CN103256784A - Refrigerator - Google Patents

Abstract

Translated fromChinese

本发明提供一种冰箱，不会产生冷冻室温度异常上升或冷藏室温度局部降低，良好地进行冷却。该冰箱具备作为冷冻温度带室的冷冻室、作为冷藏温度带室的冷藏室、收纳冷却器的冷却器室、从该冷却器室经过冷冻室再次返回冷却器室的冷冻室冷气风道、从冷却器室经过冷藏室再次返回冷却器室的冷藏室冷气风道、向冷冻室冷气风道送风的第一送风机、以及向冷藏室冷气风道送风的第二送风机，该冰箱的特征是，设定或者调整第一送风机及第二送风机的转速组合，使得第一送风机的吹出区域压力（P1）、第二送风机的吹出区域压力（P2）、冷却器室的冷却器的上游压力（P3）、冷却器室的冷却器的下游压力（P0）的关系成为P1>P3>P0及P2>P3>P0。

The present invention provides a refrigerator capable of performing good cooling without causing an abnormal increase in the temperature of the freezing compartment or a local decrease in the temperature of the refrigerating compartment. The refrigerator is provided with a freezing compartment as a freezing temperature zone compartment, a refrigerating compartment as a refrigerating temperature zone compartment, a cooler compartment for accommodating a cooler, a cold air duct for the freezing compartment from the cooler compartment, passing through the freezing compartment and returning to the cooler compartment again. The cooler room passes through the refrigerating room and returns to the refrigerating room cold air duct of the cooler room again, the first blower blows air to the freezing room cold air duct, and the second blower blows air to the refrigerating room cold air duct. The refrigerator is characterized by , set or adjust the rotation speed combination of the first blower and the second blower, so that the blowing area pressure of the first blower (P1), the blowing area pressure of the second blower (P2), the upstream pressure of the cooler in the cooler chamber (P3 ), and the downstream pressure (P0) of the cooler in the cooler chamber are P1>P3>P0 and P2>P3>P0.

Description

Translated fromChinese

冰箱refrigerator

技术领域technical field

本发明涉及一种冰箱。The invention relates to a refrigerator.

背景技术Background technique

作为本技术领域的背景技术，具有日本专利第3494874号公报（专利文献1）。As background technology in this technical field, there is Japanese Patent No. 3494874 (Patent Document 1).

在专利文献1中公开了如下冰箱：具备由压缩机、散热器、毛细管、冷却器构成的冷却系统、冷藏室、冷冻室、覆盖冷却器的冷却器空气流道、将在所述冷却器空气流道中冷却的空气送往冷藏室的冷藏室送风流道、将在所述冷却器空气流道中冷却的空气送往冷冻室的冷冻室送风流道、使空气从冷藏室向冷却器空气流道回流的冷藏室返回流道、使空气从冷冻室向冷却器空气流道回流的冷冻室返回流道、所述冷藏室送风流道内的冷藏室用风扇、所述冷冻室送风流道内的冷冻室用风扇，通过同时驱动冷藏室用风扇和冷冻室用风扇来冷却冷藏室和冷冻室（专利文献1的图7、图8、图11等）。Patent Document 1 discloses a refrigerator that includes a cooling system consisting of a compressor, a radiator, a capillary tube, and a cooler, a refrigerator compartment, a freezer compartment, a cooler air channel covering the cooler, The air cooled in the flow channel is sent to the refrigerating room air supply channel of the refrigerating room, the air cooled in the cooler air channel is sent to the freezer air supply channel of the freezing room, and the air is sent from the refrigerating room to the cooler air channel Refrigerator return passage for returning air, freezer return passage for returning air from the freezer to the cooler air passage, a fan for the refrigerator in the air supply passage for the refrigerator, and a freezer compartment in the air supply passage for the freezer With the fan, the refrigerator compartment and the freezer compartment are cooled by simultaneously driving the refrigerator compartment fan and the freezer compartment fan (FIG. 7, FIG. 8, FIG. 11, etc. of Patent Document 1).

现有技术文献prior art literature

专利文献1：日本专利第3494874号公报Patent Document 1: Japanese Patent No. 3494874

在专利文献1中记载的冰箱中，没有关于逆流现象的记载，所谓逆流现象是指，在同时驱动冷藏室用风扇和冷冻室用风扇的冷却运转过程中，从冷冻室或者冷藏室向另一方储藏室流入冷气，也就是，冷气从冷藏室返回流道或者冷冻室返回流道流向冷藏室或者冷冻室，所以该冰箱对于发生了逆流情况下的考虑不充分。该情况下，产生冷却运转过程中冷冻室温度异常上升或者冷藏室温度过于下降这样的事态，存在冰箱内不能良好冷却的情况。In the refrigerator described inPatent Document 1, there is no description about the backflow phenomenon. The so-called backflow phenomenon refers to the flow from the freezer compartment or the freezer compartment to the other during the cooling operation in which the refrigerator compartment fan and the freezer compartment fan are simultaneously driven. The cold air flows into the storage room, that is, the cold air flows from the refrigerating room return channel or the freezing room return channel to the refrigerating room or the freezing room, so the refrigerator does not fully consider the occurrence of reverse flow. In this case, during the cooling operation, the temperature of the freezer compartment rises abnormally or the temperature of the refrigerator compartment drops too much, and the inside of the refrigerator may not be properly cooled.

发明内容Contents of the invention

本发明是鉴于如上课题而作出的发明，目的在于提供一种冰箱，在利用送风机对储藏室输送冷气的冷却运转过程中，不存在储藏室温度异常上升或者局部过于下降，能够良好冷却。The present invention was made in view of the above problems, and an object of the present invention is to provide a refrigerator capable of cooling well without abnormal temperature rise or local excessive drop in the storage room during cooling operation in which the storage room is cooled by a fan.

为了解决上述课题，采用例如权利要求书中记载的结构。作为其一个例子的冰箱具备作为冷冻温度带室的冷冻室、作为冷藏温度带室的冷藏室、收纳冷却器的冷却器室、从该冷却器室经过所述冷冻室再次返回所述冷却器室的冷冻室冷气风道、从所述冷却器室经过所述冷藏室再次返回所述冷却器室的冷藏室冷气风道、向所述冷冻室冷气风道送风的第一送风机、以及向所述冷藏室冷气风道送风的第二送风机，该冰箱的特征在于，设定或者调整所述第一送风机以及所述第二送风机的转速组合，使得所述第一送风机的吹出区域压力P1、所述第二送风机的吹出区域压力P2、所述冷却器室的所述冷却器的上游压力P3、所述冷却器室的所述冷却器的下游压力P0之间的关系成为P1>P3>P0以及P2>P3>P0。In order to solve the above-mentioned problems, for example, the configuration described in the claims is employed. A refrigerator as an example thereof includes a freezer compartment as a freezing temperature zone compartment, a refrigerating compartment as a refrigeration temperature zone compartment, a cooler compartment for accommodating a cooler, and returning from the cooler compartment to the cooler compartment through the freezer compartment. The cold air duct of the freezer compartment, the cold air duct of the refrigerator compartment from the cooler compartment through the refrigerator compartment and back to the cooler compartment, the first air blower for supplying air to the cold air duct of the freezer compartment, and the first air blower for supplying air to all The second blower for blowing air from the cold air duct of the refrigerating room is characterized in that the rotation speed combination of the first blower and the second blower is set or adjusted so that the blowing area pressure P1 of the first blower, The relationship between the blowing area pressure P2 of the second air blower, the upstream pressure P3 of the cooler in the cooler chamber, and the downstream pressure P0 of the cooler in the cooler chamber is P1>P3>P0 and P2>P3>P0.

本发明的效果如下。The effects of the present invention are as follows.

根据本发明，能够提供一种冰箱，在利用送风机对储藏室输送冷气的冷却运转过程中，不存在储藏室温度异常上升或者局部过于下降的情况，能够良好冷却。According to the present invention, it is possible to provide a refrigerator capable of good cooling without an abnormal increase in the temperature of the storage room or a partial excessive drop in the temperature of the storage room during the cooling operation in which the storage room is cooled by a blower.

附图说明Description of drawings

图1是表示本发明第一实施方式涉及的冰箱的门敞开状态的主视图。Fig. 1 is a front view showing a door-open state of a refrigerator according to a first embodiment of the present invention.

图2是图1的A-A剖视图。Fig. 2 is a cross-sectional view along line A-A of Fig. 1 .

图3是表示本发明第一实施方式涉及的冰箱的冷冻室背部结构的放大图。Fig. 3 is an enlarged view showing the rear structure of the freezer compartment of the refrigerator according to the first embodiment of the present invention.

图4是表示本发明第一实施方式涉及的冰箱的风道结构的主视图。Fig. 4 is a front view showing an air duct structure of the refrigerator according to the first embodiment of the present invention.

图5是本发明第一实施方式涉及的冰箱的冷气风道的模式图。Fig. 5 is a schematic diagram of a cooling air duct of the refrigerator according to the first embodiment of the present invention.

图6是表示本发明第一实施方式涉及的冰箱的基本控制的流程图。Fig. 6 is a flowchart showing basic control of the refrigerator according to the first embodiment of the present invention.

图7是表示本发明第一实施方式涉及的冰箱的基本控制的流程图。Fig. 7 is a flowchart showing basic control of the refrigerator according to the first embodiment of the present invention.

图8是用于判别本发明第一实施方式涉及的冰箱的结霜状态的表。Fig. 8 is a table for discriminating the frosting state of the refrigerator according to the first embodiment of the present invention.

图9a是表示结霜量大小引起的流动模式变化的模式图。Fig. 9a is a schematic diagram showing changes in the flow pattern due to the amount of frost formation.

图9b是表示结霜量大小引起的流动模式变化的模式图。Fig. 9b is a schematic diagram showing changes in the flow pattern due to the amount of frost formation.

图9c是表示结霜量大小引起的流动模式变化的模式图。Fig. 9c is a schematic diagram showing changes in the flow pattern due to the amount of frost formation.

图10是表示冷冻室用风扇和冷藏室用风扇的设定值与逆流的有无的表。Fig. 10 is a table showing the setting values of the fans for the freezer compartment and the fans for the refrigerator compartment, and the presence or absence of backflow.

图11a是表示结霜量大小引起的冷冻室风量和冷藏室风量变化的图。Fig. 11a is a graph showing changes in the air volume of the freezing compartment and the air volume of the refrigerating compartment depending on the amount of frosting.

图11b是表示结霜量大小引起的冷冻室风量和冷藏室风量变化的图。Fig. 11b is a graph showing changes in the air volume of the freezing compartment and the air volume of the refrigerating compartment depending on the amount of frosting.

图12是本发明第二实施方式涉及的冰箱的冷气风道的模式图。Fig. 12 is a schematic diagram of the cooling air duct of the refrigerator according to the second embodiment of the present invention.

图中：In the picture:

1—冰箱，2—冷冻室，3—冷藏室，4—冷冻室冷气吹出口，5—冷冻室冷气返回口，6—冷藏室冷气吹出口，7—冷藏室冷气返回口，8—绝热箱体，9—绝热分隔部，10—冷冻室门搁物架，11—冷藏室门搁物架，12—冷冻室背面分隔部件，13—冷藏室背面分隔部件，14—冷冻室用风扇（冷冻室送风单元、第一送风机），15—冷藏室用风扇（冷藏室送风单元、第二送风机），16—冷却器，17—冷却器室，18—冷却器室分隔部件，20—蔬菜收纳空间，21—冷冻室送风道，22—冷藏室送风道，22a—第一冷藏室风道，22b—第二冷藏室风道，22c—第三冷藏室风道，23—冷藏室返回风道，25—压缩机，26—区划部（肋），27—冷藏室风门，28—流槽，29—除霜加热器，35—机械室，51—冷冻室温度传感器，52—冷藏室温度传感器，53—冷却器温度传感器，60—压力调整流道。1—refrigerator, 2—freezer, 3—refrigerator, 4—air outlet of freezer, 5—air return of freezer, 6—air outlet of refrigerator, 7—return of air of refrigerator, 8—insulation box Body, 9—insulation partition, 10—freezer door shelf, 11—refrigerator door shelf, 12—freezer back partition, 13—refrigerator rear partition, 14—freezer fan (freezer room air supply unit, first blower), 15—refrigerating room fan (refrigerating room air supply unit, second blower), 16—cooler, 17—cooler room, 18—cooler room partition, 20—vegetables Storage space, 21—freezer air duct, 22—refrigerator air duct, 22a—first refrigerator air duct, 22b—second refrigerator air duct, 22c—third refrigerator air duct, 23—refrigerator room Return air duct, 25—compressor, 26—division (rib), 27—refrigerator door, 28—flow trough, 29—defrosting heater, 35—mechanical room, 51—freezer temperature sensor, 52—refrigeration Chamber temperature sensor, 53—cooler temperature sensor, 60—pressure adjustment flow channel.

具体实施方式Detailed ways

以下，针对本发明的实施方式，参照附图进行说明。Hereinafter, embodiments of the present invention will be described with reference to the drawings.

实施例1Example 1

首先，参照图1~图11说明本发明涉及的冰箱的第一实施方式。First, a first embodiment of the refrigerator according to the present invention will be described with reference to FIGS. 1 to 11 .

首先参照图1~图5说明本实施方式的冰箱的结构。图1是表示本实施方式的冰箱的门敞开状态的主视图，图2是图1的A-A剖视图（门关闭状态），图3是表示本实施方式的冰箱的冷冻室背部结构的放大图。图4是表示本实施方式的冰箱的风道结构的主视图，图5是本实施方式的冰箱的冷气风道的模式图。First, the configuration of the refrigerator according to the present embodiment will be described with reference to FIGS. 1 to 5 . 1 is a front view showing the door of the refrigerator of the present embodiment in an open state, FIG. 2 is a cross-sectional view along A-A of FIG. 1 (door closed state), and FIG. FIG. 4 is a front view showing the air duct structure of the refrigerator according to the present embodiment, and FIG. 5 is a schematic view of the cooling air duct of the refrigerator according to the present embodiment.

如图1所示，本实施方式的冰箱1在上层具备冷冻室2，在下层具备冷藏室3，在冷藏室3的下部具备抽屉式的蔬菜收纳空间20。冰箱1的箱外与箱内由通过填充硬质氨基甲酸乙酯泡沫而形成的绝热箱体8分隔，冷冻室2和冷藏室3通过绝热分隔部9分隔。冷冻室2以及冷藏室3分别由前方的冷冻室门2a以及冷藏室门3a开闭，冷冻室门2a以及冷藏室门3a分别具备冷冻室门搁物架10以及冷藏室门搁物架11。As shown in FIG. 1 , therefrigerator 1 according to the present embodiment includes afreezer compartment 2 on the upper floor, arefrigerator compartment 3 on the lower floor, and a drawer-typevegetable storage space 20 below therefrigerator compartment 3 . The outside of therefrigerator 1 is separated from the inside by aninsulating box 8 filled with rigid urethane foam, and thefreezer compartment 2 and therefrigerator compartment 3 are separated by aninsulating partition 9 .Freezer compartment 2 andrefrigerator compartment 3 are opened and closed by frontfreezer compartment door 2a andrefrigerator compartment door 3a, respectively.

冷冻室门搁物架10以及冷藏室门搁物架11是上部敞开的袋形状收纳部，尤其是冷藏室门搁物架11适合于收纳填装有清凉饮料水、矿泉水的塑料瓶、罐等饮料容器，使用者易于存取饮料容器。Thefreezer door shelf 10 and therefrigerator door shelf 11 are bag-shaped storage parts with the top open, especially therefrigerator door shelf 11 is suitable for storing plastic bottles and cans filled with cool drink water and mineral water. and other beverage containers, the user can access the beverage container easily.

在冷冻室2的背面（从正面观察冰箱1为冷冻室2的里侧）配设有冷冻室背面分隔部件12，冷冻室背面分隔部件12在上部具备冷冻室冷气吹出口4，在下部具备冷冻室冷气返回口5。而且，冷冻室冷气吹出口4在上下方向上设有多个，与由载置食品的搁板2b区划出的多个储藏空间分别对应地吹出冷气。On the back side of the freezer compartment 2 (refrigerator 1 is the back side of thefreezer compartment 2 when viewed from the front), a freezercompartment back partition 12 is provided. Room air-conditioning returns toport 5. In addition, freezer compartmentcold air outlets 4 are provided in plural in the vertical direction, and cool air is blown out corresponding to a plurality of storage spaces partitioned byshelf 2b on which foods are placed.

在冷藏室3的背面（从正面观察冰箱1为冷藏室3的里侧）配设有冷藏室背面分隔部件13，冷藏室背面分隔部件13具备冷藏室冷气吹出口6。冷藏室冷气吹出口6在上下方向设有多个，向由载置食品的搁板3b区划出的各个储藏空间输送冷气。On the back side of the refrigerator compartment 3 (refrigerator 1 is the back side of therefrigerator compartment 3 when viewed from the front), a refrigerator compartmentback partition member 13 is arranged. The refrigerator compartmentrear partition member 13 has a refrigerator compartmentcold air outlet 6 . A plurality ofcool air outlets 6 in the refrigerator compartment are provided in the vertical direction, and cool air is sent to each storage space partitioned by theshelf 3b on which food is placed.

如图2所示，冰箱1在冷冻室2的背部具备冷却器室17，在冷却器室17内收纳有作为冷却单元的翅片管型的冷却器16。冷却器16、冰箱1的背面下部的机械室35内所配备的压缩机25、作为散热单元的未图示的散热器、作为减压单元的未图示的毛细管利用制冷剂管连接构成冷冻循环。冷却器室17的前方由冷却器室分隔部件18分隔，在冷却器室分隔部件18与冷冻室背面分隔部件12之间形成有冷冻室送风道21。在冷却器16的下方配设有除霜加热器29，使得能够融解冷却器16上结成的霜。霜融解所产生的除霜水下滴到配设在除霜加热器29下方的作为储水部的流槽28，经由未图示的排水管到达机械室35，向下流至机械室35内所配备的未图示的蒸发皿，利用压缩机25的放热等蒸发。As shown in FIG. 2 ,refrigerator 1 includescooler chamber 17 at the back offreezer compartment 2 , and fintube type cooler 16 as a cooling unit is accommodated incooler chamber 17 . Thecooler 16, thecompressor 25 installed in themachine room 35 at the lower back of therefrigerator 1, the unillustrated radiator as a heat dissipation unit, and the unillustrated capillary tube as a decompression unit are connected by refrigerant pipes to form a refrigeration cycle. . The front ofcooler compartment 17 is partitioned by coolercompartment partition member 18 , and freezer compartmentair supply duct 21 is formed between coolercompartment partition member 18 and freezer compartmentrear partition member 12 . A defrostingheater 29 is disposed below thecooler 16 so as to melt frost formed on thecooler 16 . The defrosting water generated by the melting of frost drips into thegutter 28 as a water storage part arranged below the defrostingheater 29, reaches themachine room 35 through a drain pipe not shown in the figure, and flows down to themachine room 35. The equipped evaporator (not shown) evaporates using the heat released by thecompressor 25 or the like.

图3是表示冷冻室2背面的冷冻室背面分隔部件12（参照图2）拆卸后状态的放大图。在冷冻室背面分隔部件12的背部，配设有冷却器室分隔部件18（参照图2）。在冷却器室分隔部件18的上部，在冰箱1的宽度方向上并排具备有作为冷冻室送风单元的冷冻室用风扇14（第一送风机）和作为冷藏室送风单元的冷藏室用风扇15（第二送风机）。与冷却器室分隔部件18的背部的冷却器室17内所配备的冷却器16进行换热后的冷气利用冷冻室用风扇14以及冷藏室用风扇15送往冷冻室2以及冷藏室3。在冷藏室用风扇15的侧方，形成有冷藏室送风道22。而且，在冷却器室分隔部件18的前面（冷藏室用风扇15的吹出侧），设有肋形状的区划部26，从冷藏室用风扇15吹出的冷气被引导至冷藏室送风道22。另外，在冷却器室分隔部件18设有开口5a，该开口5a用于使从设在冷冻室背面分隔部件12的冷冻室冷气返回口5（参照图1）流入的返回冷气流入冷却器室17内。FIG. 3 is an enlarged view showing a state where freezer compartment back partition member 12 (see FIG. 2 ) on the back side offreezer compartment 2 is removed. A coolercompartment partition member 18 is disposed on the back of the freezer compartment rear partition member 12 (see FIG. 2 ). On the upper portion of the coolercompartment partition member 18, a freezer fan 14 (first blower) as a freezer ventilation unit and arefrigerator fan 15 as a refrigerator ventilation unit are arranged side by side in the width direction of therefrigerator 1. (second blower). Cooled air after exchanging heat with cooler 16 provided incooler compartment 17 at the back of coolercompartment partition member 18 is sent tofreezer compartment 2 andrefrigerator compartment 3 byfreezer compartment fan 14 andrefrigerator compartment fan 15 . On the side of thefan 15 for a refrigerator, arefrigerator air duct 22 is formed. Furthermore, a rib-shapedpartition 26 is provided on the front side of cooler compartment partition member 18 (on the blowing side of refrigerating compartment fan 15 ), and cold air blown from refrigeratingcompartment fan 15 is guided to refrigeratingcompartment air duct 22 . In addition, the coolercompartment partition member 18 is provided with anopening 5a for allowing return cold air flowing in from the freezer compartment cool air return port 5 (see FIG. 1 ) provided on the freezer compartmentrear partition member 12 into thecooler compartment 17. Inside.

如图4所示，冷藏室送风道22在从冷冻室2正面观察的背面左侧向下方延伸，分支为在绝热分隔部9的背部并且在冷藏室3的背面左侧向下方延伸的第一冷藏室风道22a（由虚线进行图示）；在背面右侧向下方延伸的第二冷藏室风道22b（由虚线进行图示）；在绝热分隔部9的下部向前方延伸的第三冷藏室风道22c（参照图2）。在第一冷藏室风道22a、第二冷藏室风道22b、以及第三冷藏室风道22c上，分别形成有冷藏室冷气吹出口6，对由搁板3b、冷藏室门搁物架11等区划出的各个收纳空间对应地供给冷气。As shown in FIG. 4 , the refrigeratingroom air duct 22 extends downward on the left side of the back side viewed from the front of the freezingroom 2 , and branches into a second section extending downward on the back side of therefrigerating room 3 at the back side of theheat insulating partition 9 . A refrigeratingroom air duct 22a (illustrated by dotted lines); a second refrigeratingroom air duct 22b (illustrated by dotted lines) extending downward on the right side of the back; Refrigeratingroom air duct 22c (refer to FIG. 2 ). On the first refrigeratingroom air channel 22a, the second refrigeratingroom air channel 22b, and the third refrigeratingroom air channel 22c, the coldair blowing outlet 6 of the refrigerating room is respectively formed, and theshelves 3b, the refrigeratingroom door shelf 11 Each storage space demarcated by the equal area is supplied with cold air correspondingly.

另外，在冷藏室3的背面中央，形成有冷藏室返回风道23（由虚线进行图示），使得从形成于冷藏室3下部的蔬菜收纳空间20的背部的冷藏室冷气返回口7流入的冷气流入冷却器室17。而且，在冷藏室送风道22内配设有控制向冷藏室3的冷气量的通风阻力调整单元、即冷藏室风门27。In addition, in the back center of therefrigerator compartment 3, a refrigerator compartment return air duct 23 (illustrated by a dotted line) is formed, so that the cold air returning to the refrigerator compartment from the refrigerator compartment coldair return port 7 formed on the back of thevegetable storage space 20 at the bottom of therefrigerator compartment 3 flows in. The cold air flows into thecooler chamber 17 . In addition, in refrigeratorcompartment air duct 22 ,refrigerator compartment damper 27 , which is a ventilation resistance adjustment means for controlling the amount of cool air torefrigerator compartment 3 , is disposed.

此处，针对冰箱1内冷气的基本流动，参照图5进行说明。图5表示冷藏室风门27为打开状态、冷冻室用风扇14和冷藏室用风扇15均为驱动状态下冷气在冷冻室2和冷藏室3中循环的状态。如图5中箭头所示，由冷却器16冷却后的冷气利用冷冻室用风扇14升压，经由冷冻室送风道21从冷冻室冷气吹出口4流入冷冻室2。对冷冻室2进行冷却后的冷气经由冷冻室冷气返回口5返回冷却器室17，再次由冷却器16冷却。Here, the basic flow of cold air in therefrigerator 1 will be described with reference to FIG. 5 . 5 shows a state in which cool air circulates in thefreezer compartment 2 and therefrigerator compartment 3 with therefrigerator compartment damper 27 open and thefreezer compartment fan 14 and therefrigerator compartment fan 15 both driven. As shown by the arrow in FIG. 5 , the cold air cooled by the cooler 16 is pressurized by thefreezer fan 14 and flows into thefreezer 2 through thefreezer air duct 21 from the freezercool air outlet 4 . The cold air after cooling thefreezer compartment 2 returns to thecooler compartment 17 through the freezer compartment coldair return port 5, and is cooled by the cooler 16 again.

另一方面，由冷却器16冷却后的冷气的一部分利用冷藏室用风扇15升压，经由冷藏室送风道22从冷藏室冷气吹出口6流入冷藏室3。对冷藏室3进行冷却后的冷气从冷藏室冷气返回口7在冷藏室返回风道23中流到冷却器室17，由冷却器16再次冷却。On the other hand, part of the cold air cooled by cooler 16 is pressurized byrefrigerator fan 15 , and flows intorefrigerator compartment 3 from refrigerator compartmentcool air outlet 6 through refrigeratorcompartment air duct 22 . The cold air after cooling the refrigeratingchamber 3 flows from the refrigerating chamber coldair returning port 7 in the refrigerating chamberreturn air duct 23 to thecooler chamber 17 and is cooled again by the cooler 16 .

而且，在本实施方式的冰箱中，使从冷藏室送风道22经由冷藏室冷气吹出口6、冷藏室冷气返回口7、冷藏室冷气返回风道23到达冷却器室17的冷藏室侧风道的通风阻力大于从冷冻室送风道21经由冷冻室冷气吹出口4、冷冻室冷气返回口5到达冷却器室17的冷冻室侧风道的通风阻力。具体地，通过使冷藏室冷气吹出口6的总开口面积为5000mm²、冷冻室冷气吹出口4的总开口面积为15000mm²，从而使得冷藏室侧风道的通风阻力大于冷冻室侧风道的通风阻力。In addition, in the refrigerator of the present embodiment, the side wind from the refrigerator compartment reaches thecooler compartment 17 from the refrigerator compartmentair supply duct 22 through the refrigerator compartmentcool air outlet 6, the refrigerator compartment coolair return port 7, and the refrigerator compartment coolair return duct 23. The ventilation resistance of the passage is greater than the ventilation resistance of the freezing chamber side air passage from the freezing chamberair supply passage 21 to the freezing chamber side air passage of thecooler chamber 17 via the freezing chambercold air outlet 4 and the freezing chamber coldair returning port 5 . Specifically, the total opening area of thecold air outlet 6 in the refrigerator compartment is 5000 mm² , and the total opening area of thecold air outlet 4 in the freezer compartment is 15000 mm² , so that the ventilation resistance of the side air duct of the refrigerator compartment is greater than that of the side air duct of the freezer compartment. ventilation resistance.

另外，冰箱1具备用于检测冷冻室2、冷藏室3、冷却器16、外部空气温度的冷冻室温度传感器51（参照图2）、冷藏室温度传感器52（参照图2）、冷却器温度传感器53（参照图2）、未图示的外部空气温度传感器。并且，冰箱1具备分别检测门2a、3a的开闭状态的未图示的门传感器。In addition, therefrigerator 1 includes a freezer compartment temperature sensor 51 (see FIG. 2 ), a refrigerator compartment temperature sensor 52 (see FIG. 2 ), and a cooler temperature sensor for detecting the temperatures of thefreezer compartment 2, therefrigerator compartment 3, the cooler 16, and the outside air. 53 (refer to FIG. 2 ), an outside air temperature sensor not shown. Further,refrigerator 1 includes door sensors (not shown) that detect the open and closed states ofdoors 2a and 3a, respectively.

冰箱1具备搭载有CPU、ROM或RAM等存储器、接口电路等的未图示的控制基板，控制基板与所述的冷冻室温度传感器51、冷藏室温度传感器52、冷却器温度传感器53、分别检测冷冻室门2a、冷藏室门2b的开闭状态的门传感器、未图示的温度设定器、将储藏室在短时间内冷却至规定温度的快速冷却模式设定器、将冷冻室2在短时间内冷却至规定温度的快速冷冻模式设定器等连接。利用所述ROM中预先搭载的程序，进行压缩机25的ON/OFF或转速控制、驱动冷藏室风门27的未图示的驱动器的控制、冷冻室用风扇14和冷藏室用风扇15的ON/OFF或转速控制等控制。Refrigerator 1 is equipped with CPU, ROM or RAM etc. memory, interface circuit etc. not shown control substrate, control substrate and above-mentioned freezercompartment temperature sensor 51, refrigeratingcompartment temperature sensor 52,cooler temperature sensor 53, respectively detect Door sensors for opening and closing states of thefreezer compartment door 2a and refrigeratingcompartment door 2b, a temperature setting device not shown, a rapid cooling mode setting device for cooling the storage compartment to a predetermined temperature in a short time, and setting thefreezer compartment 2 at It is connected to a rapid freezing mode setter that cools down to a predetermined temperature in a short time, etc. The ON/OFF or rotation speed control of thecompressor 25, the control of the unillustrated driver for driving therefrigerating compartment damper 27, and the ON/OFF of the freezingcompartment fan 14 and therefrigerating compartment fan 15 are performed using the program preinstalled in the ROM. OFF or speed control and other controls.

接着，针对本实施方式的冰箱的控制，参照图6~图8进行说明。图6以及图7是表示本实施方式的冰箱的基本控制的控制流程图，图8是用于判别本实施方式的冰箱1的结霜状态的值的表。而且，控制通过控制装置、例如控制基板的CPU执行保存在ROM中的程序来进行。Next, control of the refrigerator according to this embodiment will be described with reference to FIGS. 6 to 8 . 6 and 7 are control flowcharts showing basic control of the refrigerator according to the present embodiment, and FIG. 8 is a table of values for determining the frosting state of therefrigerator 1 according to the present embodiment. Furthermore, control is performed by a control device, for example, a CPU of a control board executing a program stored in a ROM.

如图6所示，冰箱1通过接通电源来开始运转（开始）。接通电源后实施使未冷却的箱内快速冷却至设定温度附近的所谓下降（pull down）运转，但是此处省略下降运转时的控制，说明从箱内被冷却至规定温度、压缩机处于停止状态起的控制。As shown in FIG. 6 , therefrigerator 1 starts to operate (starts) when the power is turned on. After the power is turned on, the so-called pull down operation is performed to quickly cool the uncooled box to the vicinity of the set temperature. However, the control during the pull down operation is omitted here. Control from stop state.

在冰箱1的压缩机停止状态下，判定压缩机启动条件是否成立（步骤S101）。在冰箱1中，在冷冻室温度传感器51检测的冷冻室温度（以下称作“冷冻室温度”）为TF2（TF2=-17℃）以上（冷冻室2为上限设定温度以上）、或者冷藏室温度传感器52检测的冷藏室温度（以下称作“冷藏室温度”）为TR2（TR2=6℃）以上（冷藏室3为上限设定温度以上）的情况下，压缩机启动条件成立（步骤S101为Yes），接着，冷冻室用风扇14以及冷藏室用风扇15的转速设定值分别设定为1（步骤S102）。In the state where the compressor of therefrigerator 1 is stopped, it is determined whether or not the condition for starting the compressor is satisfied (step S101 ). In therefrigerator 1, the freezer temperature detected by the freezer temperature sensor 51 (hereinafter referred to as "freezer temperature") is above TF2 (TF2 = -17°C) (thefreezer 2 is above the upper limit set temperature), or the refrigerator When the temperature of the refrigerating compartment detected by the compartment temperature sensor 52 (hereinafter referred to as "refrigerating compartment temperature") is higher than TR2 (TR2 = 6°C) (therefrigerating compartment 3 is at or above the upper limit setting temperature), the condition for starting the compressor is established (step Yes in S101 ), and then, the rotational speed setting values of thefan 14 for the freezer compartment and thefan 15 for the refrigerator compartment are each set to 1 (step S102 ).

而且，在冰箱1中，冷冻室用风扇14以及冷藏室用风扇15各自的转速能够切换为设定值1~5共5阶段，设定值1为最低速，设定值5为最高速。冷冻室用风扇14的设定值和具体的转速之间的关系如下，设定值1：大约1200min^-1，设定2：大约1600min^-1，设定3：大约2000min^-1，设定4：大约2400min^-1，设定5：大约2800min^-1。另外，冷藏室用风扇15的设定值和具体的转速之间的关系如下，设定值1：大约1100min^-1，设定2：大约1500min^-1，设定3：大约1900min^-1，设定4：大约2300min^-1，设定5：大约2700min^-1。In addition, in therefrigerator 1, the rotational speeds of thefreezer compartment fan 14 and therefrigerator compartment fan 15 are switchable in five stages ofset values 1 to 5, withset value 1 being the lowest speed and setvalue 5 being the highest speed. The relationship between the setting value of thefan 14 for the freezer and the specific rotational speed is as follows, setting value 1: about 1200min^-1 , setting 2: about 1600min^-1 , setting 3: about 2000min^-1 , setting 4 : about 2400 min^-1 , setting 5: about 2800 min^-1 . In addition, the relationship between the^set value and the specific rotational speed of thefan 15 for the refrigerating^room is as follows^. Setting 4: about 2300 min^-1 , setting 5: about 2700 min^-1 .

接着，开始冷藏和冷冻室冷却运转，即冷藏室风门27成为打开状态，压缩机25成为驱动状态，冷冻室用风扇14以及冷藏室用风扇15以基于步骤S101中设定的设定值的转速被驱动，对冷冻室2和冷藏室3双方进行冷却（步骤S103）。Then, the refrigeration and freezer cooling operations are started, that is, therefrigerator door 27 is opened, thecompressor 25 is driven, and thefreezer fan 14 and therefrigerator fan 15 rotate at a speed based on the set value set in step S101. is driven to cool both thefreezer compartment 2 and the refrigerator compartment 3 (step S103 ).

在冷藏和冷冻室冷却运转过程中，首先，进行冷冻室2的热负荷是否大的判定（步骤S104）。步骤S104在冷冻室温度为TF3（TF3=-14℃）以上（冷冻室2为热负荷设定上限温度以上）的情况下成立（Yes）。在步骤S104不成立的情况下，接着进行冷藏室的热负荷是否大的判定（步骤S105）。步骤S105在冷藏室温度为TR3（TR3=8℃）以上（冷藏室3为热负荷设定上限温度以上）的情况下成立（Yes）。During the refrigerating and freezing compartment cooling operation, first, it is determined whether or not the thermal load of the freezingcompartment 2 is large (step S104 ). Step S104 is established (Yes) when the freezer compartment temperature is equal to or higher than TF3 (TF3=−14° C.) (thefreezer compartment 2 is equal to or greater than the thermal load setting upper limit temperature). When step S104 is not established, it is next determined whether or not the thermal load of the refrigerator compartment is large (step S105 ). Step S105 is established (Yes) when the refrigerator compartment temperature is equal to or higher than TR3 (TR3=8° C.) (refrigerator compartment 3 is equal to or greater than the heat load setting upper limit temperature).

在步骤S105未成立的情况下，接着判定是否实施结霜量判定运转（下文中详细叙述）（步骤S106）。在步骤S106不成立的情况下（No），接着判定冷藏室风门关闭条件是否已经成立（步骤S107）。步骤S107在冷藏室温度为TR1（TR1=2℃）以上（冷藏室3为下限设定温度以下）的情况下成立（Yes）。在步骤S107不成立的情况下，再次返回步骤S104的判定（关于步骤S104、S105、S106成立的情况，在下文中叙述）。If step S105 is not established, it is next determined whether or not to implement frosting amount determination operation (described in detail below) (step S106 ). When step S106 is not satisfied (No), next, it is judged whether the refrigerator compartment damper closing condition is satisfied (step S107). Step S107 is established (Yes) when the refrigerator compartment temperature is equal to or higher than TR1 (TR1=2° C.) (refrigerator compartment 3 is equal to or less than the lower limit set temperature). When step S107 is not established, it returns to the determination of step S104 again (the cases of step S104 , S105 , and S106 are established will be described later).

在步骤S107成立的情况下，接着实施冷冻室冷却运转，即冷藏室风门27成为关闭状态，冷藏室用风扇15停止，冷冻室用风扇14和压缩机25被驱动冷却冷冻室2（步骤S108）。在冷冻室冷却运转实施过程中，判定冷藏室风门关闭条件是否已经成立（步骤S109）。步骤S109在冷藏室温度为TR2（TR2=6℃）以上的情况下成立（Yes）。在步骤S109成立的情况下，转移到步骤S103，冷藏室风门27成为打开状态，开始冷藏和冷冻室冷却运转。在步骤S109不成立的情况下（No），接着判定压缩机停止条件是否成立（步骤S110）。步骤S110在冷冻室温度为TF1（TF2=-21℃）以下（冷冻室2为下限设定温度以下）的情况下成立（Yes），在步骤S110不成立的情况下，再次返回步骤S109的判定。在步骤S110成立的情况下，压缩机25、冷冻室用风扇14停止（步骤S111），返回步骤S101的压缩机启动条件判定。When step S107 is established, then implement the freezer cooling operation, that is, therefrigerator door 27 is closed, therefrigerator fan 15 is stopped, and thefreezer fan 14 andcompressor 25 are driven to cool the freezer 2 (step S108) . During execution of the freezing compartment cooling operation, it is determined whether or not the condition for closing the refrigerating compartment damper is satisfied (step S109 ). Step S109 is established (Yes) when the refrigerator compartment temperature is equal to or higher than TR2 (TR2=6°C). When step S109 is established, it transfers to step S103, therefrigerating compartment damper 27 is opened, and a refrigerating and freezing compartment cooling operation is started. When step S109 is not satisfied (No), it is next determined whether or not the compressor stop condition is satisfied (step S110 ). Step S110 is established (Yes) when the freezer compartment temperature is TF1 (TF2=-21° C.) or lower (thefreezer compartment 2 is lower than the lower limit set temperature), and returns to step S109 again when step S110 is not established. When step S110 is established, thecompressor 25 and thefreezer compartment fan 14 are stopped (step S111 ), and the process returns to the determination of the compressor activation condition in step S101 .

接着，针对在步骤S104中判定为冷冻室热负荷大的情况进行说明。步骤S104例如在冷冻室门2a的打开时间长、或者在冷冻室2中收纳有常温以上食品时等情况下成立。在步骤S104成立的情况下，转移到图7所示的步骤S201，判定冷冻室用风扇设定值是否已经成为了最大。例如，在冷冻室用风扇设定值设定为1的情况下，步骤S201不成立（No），转移到步骤S202在冷冻室用风扇设定值上加1。由此，冷冻室用风扇的设定值成为2。接着，判定是否是向冷却器16的结霜量多的状态（步骤S203）。Next, a case where it is determined in step S104 that the thermal load of the freezing compartment is large will be described. Step S104 is established, for example, when thefreezer compartment door 2 a is opened for a long time, or when food at or above normal temperature is stored in thefreezer compartment 2 . When step S104 is established, it transfers to step S201 shown in FIG. 7, and it determines whether the fan setting value for freezing compartments has reached the maximum. For example, when the setting value of the fan for freezing compartment is set to 1, step S201 is not established (No), and it transfers to step S202, and 1 is added to the setting value of the fan for freezing compartment. Thereby, the setting value of the fan for freezer compartments becomes 2. Next, it is determined whether or not the amount of frost deposited on cooler 16 is large (step S203 ).

此处，参照图8说明冰箱1的结霜量判定方法。冰箱1使用外部空气温度、上次除霜运转后的压缩机累计驱动时间、上次除霜运转后的门开闭次数来判定结霜量。具体地，如图8所示，对外部空气温度、压缩机累计驱动时间、除霜运转后的门开闭次数分配点数，计算各点数的和，如果点数的和为4以下，则判定为“结霜量小”，如果为5以上，则判定为“结霜量大”。因此，例如在外部空气温度Tout=30℃、压缩机驱动时间t=5h、除霜运转后的门开闭次数Nd=10次的情况下，点数为3+0+1=4，判定为“结霜量小”。Here, a method for determining the frosting amount of therefrigerator 1 will be described with reference to FIG. 8 . Therefrigerator 1 determines the amount of frosting by using the outside air temperature, the accumulated drive time of the compressor since the previous defrosting operation, and the number of door openings and closings since the previous defrosting operation. Specifically, as shown in FIG. 8, points are assigned to the outside air temperature, the cumulative driving time of the compressor, and the number of times of door opening and closing after defrosting operation, and the sum of each point is calculated. If the sum of the points is 4 or less, it is judged as " The amount of frosting is small", and if it is 5 or more, it is judged as "the amount of frosting is large". Therefore, for example, when the outside air temperature Tout=30°C, the compressor driving time t=5h, and the number of times Nd of door opening and closing after defrosting operation is 10 times, the number of points is 3+0+1=4, and the judgment is " The amount of frosting is small".

在步骤S203未成立的情况下，也就是在步骤S203中判定为“结霜量小”的情况下，接着判定冷冻室用风扇14的设定值和冷藏室用风扇15的设定值之差是否为3以上（步骤S204）。在步骤S204成立的情况下（Yes），对冷藏室用风扇15的设定值加1（步骤S205）。例如，在冷冻室用风扇14的设定值为2、冷藏室用风扇15的设定值为1的情况下，步骤S204不成立（步骤S204成立的情况在下文叙述），接着判定是否产生了冷气从冷藏室3向冷冻室2流动、或者从冷冻室2向冷藏室3流动的所谓逆流现象（步骤S206）。冰箱1根据从冷冻室用风扇14或者冷藏室用风扇15的设定值被变更时间点开始的冷冻室温度或者冷藏室温度的变化来判定有无逆流。具体地，在从冷冻室用风扇14或者冷藏室用风扇15的设定值被变更时间点起两分钟后的冷冻室温度上升了0.5℃以上的情况下判定为冷藏室3的冷气正向冷冻室2逆流，在两分钟后的冷藏室温度下降了0.5℃以上的情况下判定为冷冻室2的冷气正向冷藏室3逆流（关于逆流，在下文详细叙述）。When step S203 is not established, that is, when it is determined in step S203 that "the amount of frosting is small", the difference between the set value of thefan 14 for the freezer and the set value of thefan 15 for the refrigerating room is determined next. Whether it is 3 or more (step S204). When step S204 is established (Yes), 1 is added to the set value of thefan 15 for refrigerator compartments (step S205). For example, when the set value of thefan 14 for the freezer compartment is 2 and the set value of thefan 15 for the refrigerating compartment is 1, step S204 is not established (the case of step S204 is established as described below), and then it is determined whether cold air is generated. A so-called backflow phenomenon of flowing from therefrigerator compartment 3 to thefreezer compartment 2 or from thefreezer compartment 2 to the refrigerator compartment 3 (step S206 ).Refrigerator 1 determines the presence or absence of backflow based on a change in the temperature of the freezer compartment or the temperature of the refrigerator compartment since the set value of thefan 14 for the freezer compartment or thefan 15 for the refrigerator compartment was changed. Specifically, it is determined that the cold air in therefrigerator compartment 3 is freezing when the temperature in the freezer compartment has risen by 0.5° C. or more two minutes after the set value of thefan 14 for the freezer compartment or thefan 15 for the refrigerator compartment has been changed.Compartment 2 flows backward, and when the temperature of the refrigerator compartment drops by 0.5° C. or more two minutes later, it is determined that the cold air infreezer compartment 2 is flowing backward into refrigerator compartment 3 (details of the reverse flow will be described later).

在步骤S206中判定为“存在逆流”的情况下（步骤S206为Yes），冷藏室用风扇15的设定值被提升至冷冻室用风扇14的设定值，冷冻室用风扇14和冷藏室用风扇15成为相同设定值（步骤S302）。另一方面，在步骤S206不成立的情况下，转移到图6的步骤S105的判定，而在步骤S105~S107不成立的情况下，再次回到步骤S104进行冷冻室热负荷的判定。在冷冻室热负荷大的情况下，通过步骤S202多次成立，冷冻室用风扇14的设定值被提升。而且，在冷冻室用风扇14的设定值达到最大值5后，步骤S201成立（Yes），冷冻室用风扇14的设定值不被变更，转移到步骤S203的判定。When it is determined in step S206 that "there is backflow" (step S206 is Yes), the set value of thefan 15 for the refrigerator compartment is raised to the set value of thefan 14 for the freezer compartment, and thefan 14 for the freezer compartment and the refrigerator compartment Thefan 15 becomes the same set value (step S302). On the other hand, when step S206 is not established, it transfers to the determination of step S105 in FIG. 6 , and when steps S105 to S107 are not established, it returns to step S104 again to determine the thermal load of the freezer compartment. When the heat load of the freezer compartment is large, the setting value of thefan 14 for the freezer compartment is raised by step S202 being established multiple times. Then, when the set value of thefan 14 for the freezer reaches the maximum value of 5, step S201 is established (Yes), the set value of thefan 14 for the freezer is not changed, and the process proceeds to the determination of step S203.

另外，在步骤S203中判定为“结霜量大”的情况下（步骤S203为Yes），判定冷冻室用风扇14的设定值与冷藏室用风扇15的设定值之差是否为2以上（步骤S301）。在步骤S301成立的情况下（Yes），接着在步骤S205中对冷藏室用风扇15的设定值加1。In addition, when it is determined in step S203 that "the amount of frosting is large" (Yes in step S203), it is determined whether the difference between the set value of thefreezer compartment fan 14 and the set value of therefrigerating compartment fan 15 is 2 or more. (step S301). When step S301 is established (Yes), then, in step S205, the setting value of thefan 15 for refrigerator compartments is incremented by 1.

接着，针对在步骤S105中判定为冷藏室热负荷大的情况进行说明。步骤S105例如在冷藏室门3a的打开时间长、或者在冷冻室2中收纳有常温以上的食品时等情况下成立。在步骤S105成立的情况下，接着判定冷藏室用风扇设定值是否已经最大（步骤S207）。在步骤S207不成立的情况下（No），对冷藏室用风扇设定值加1（步骤S208），转移到向冷却器的结霜量的判定（步骤S209）。在步骤S207成立的情况下，不变更冷藏室用风扇设定值，转移到步骤S209。步骤S209中结霜量的判定与步骤S203相同，在步骤S209不成立的情况下（No），判定冷冻室用风扇14的设定值与冷藏室用风扇15的设定值之差是否为3以上（步骤S201），在步骤S209成立的情况下，判定冷冻室用风扇14的设定值与冷藏室用风扇15的设定值之差是否为2以上（步骤S303）。在步骤S210或者步骤S303成立的情况下（Yes），对冷冻室用风扇14的设定值加1（步骤S211），转移到有无逆流的判定（步骤S212）。在步骤S210或者步骤S303不成立的情况下，不变更冷冻室用风扇14的设定值，转移到步骤S212。步骤S212的判定与步骤S206相同，在步骤S212成立的情况下（Yes），冷冻室用风扇14的设定值被提升至冷藏室用风扇15的设定值，冷冻室用风扇14和冷藏室用风扇15成为相同设定值（步骤S304）。另一方面，在步骤S212不成立的情况下，转移到图6的步骤S106的判定。Next, a case where it is determined in step S105 that the thermal load of the refrigerator compartment is large will be described. Step S105 is established, for example, when therefrigerator compartment door 3a is opened for a long time, or when food at a normal temperature or higher is stored in thefreezer compartment 2 . When step S105 is established, it is next determined whether or not the fan setting value for a refrigerator compartment has reached the maximum (step S207). When step S207 is not established (No), 1 is added to the set value of the fan for refrigerator compartments (step S208), and it transfers to determination of the frosting amount to a cooler (step S209). When step S207 is established, it transfers to step S209 without changing the fan setting value for refrigerating compartments. The determination of the amount of frosting in step S209 is the same as that in step S203. If step S209 is not established (No), it is determined whether the difference between the set value of thefan 14 for the freezer and the set value of thefan 15 for the refrigerating room is 3 or more (Step S201 ), when step S209 is established, it is determined whether the difference between the set value of thefreezer compartment fan 14 and the set value of therefrigerating compartment fan 15 is 2 or more (step S303 ). When step S210 or step S303 is established (Yes), 1 is added to the setting value of thefan 14 for freezing compartments (step S211), and it transfers to the determination of whether backflow exists (step S212). When step S210 or step S303 is not established, the setting value of thefan 14 for freezing compartments is not changed, and it transfers to step S212. The determination of step S212 is the same as that of step S206. When step S212 is established (Yes), the set value of thefan 14 for the freezer compartment is raised to the set value of thefan 15 for the freezer compartment, and thefan 14 for the freezer compartment and the freezer compartment Thefan 15 becomes the same set value (step S304). On the other hand, when step S212 is not established, it transfers to the determination of step S106 in FIG. 6 .

接着，针对结霜量判定运转进行说明。判定有无实施结霜量判定运转的图6的步骤S106在从上次结霜量判定运转结束后经过了30分钟以上的情况下成立（Yes）。此处，之所以为30分钟的理由，是因为可以想到如果为例如10分钟或者20分钟程度，则从上次判定起的经过时间短，结霜的状态并没有持续太久。在步骤S106成立的情况下，通过图7的步骤S213实施结霜量判定运转。所谓结霜量判定运转，是利用逆流是否容易产生依赖于冷却器16的结霜量（理由在下文叙述）来检测结霜量的运转。具体地，是将冷冻室用风扇14以及冷藏室用风扇15的转速分别变更为设定值1以及设定值2并基于从变更风扇转速时间点起两分钟后冷冻室温度的变化来判定结霜量的运转。冰箱1利用结霜量判定运转在冷冻室温度上升了0.5℃以上的情况下判定为冷却器16处于“结霜量过大”状态，步骤S214的除霜条件成立（Yes）。在步骤S214不成立的情况下，冷冻室用风扇14以及冷藏室用风扇15成为结霜量判定运转实施前的设定值，转移到图6的步骤S107。Next, the frosting amount determination operation will be described. Step S106 in FIG. 6 , which determines whether or not the frosting amount judging operation is performed, is established (Yes) when 30 minutes or more have elapsed since the previous frosting amount judging operation was completed. Here, the reason why it is 30 minutes is because it is conceivable that if it is about 10 minutes or 20 minutes, the elapsed time from the previous determination is short, and the state of frosting does not last too long. When step S106 is established, frosting amount determination operation is performed in step S213 of FIG. 7 . The frosting amount judging operation is an operation for detecting the amount of frosting based on whether backflow is likely to occur depending on the amount of frosting in the cooler 16 (the reason will be described later). Specifically, the rotation speeds of thefreezer compartment fan 14 and therefrigerator compartment fan 15 are changed to theset value 1 and theset value 2 respectively, and the result is determined based on the change in the freezer compartment temperature two minutes after the change of the fan speed. Operation of the amount of frost.Refrigerator 1 determines that cooler 16 is in the "excessive frosting" state when the freezer compartment temperature has risen by 0.5° C. or more by the frosting amount judging operation, and the defrosting condition in step S214 is satisfied (Yes). When step S214 is not established, thefan 14 for a freezer compartment and thefan 15 for a refrigerator compartment become the set value before execution of frosting amount determination operation, and it transfers to step S107 of FIG.

在图7的步骤S214成立的情况下，接下来，压缩机25、冷冻室用风扇14、冷藏室用风扇15停止，开始对除霜加热器29通电，实施除霜运转（步骤S215）。除霜运转在除霜结束条件已成立的情况下结束（图7的步骤S216）。步骤S216在冷却器温度传感器53检测的冷却器温度上升并到达设想除霜已经完成的8℃的情况下成立（Yes）。在步骤S216成立的情况下，接下来，冷冻室用风扇14的设定值、冷藏室用风扇15的设定值都设定为最大值5（图7的步骤S217），转移到图6的步骤S103，实施冷藏冷冻运转。If step S214 of FIG. 7 is established, thencompressor 25 ,freezer fan 14 , andrefrigerator fan 15 are stopped, anddefrosting heater 29 is started to be energized to perform a defrosting operation (step S215 ). The defrosting operation ends when the defrosting end condition is satisfied (step S216 in FIG. 7 ). Step S216 is established (Yes) when the temperature of the cooler detected by thecooler temperature sensor 53 has risen and reached 8° C. where it is assumed that defrosting has been completed. When step S216 is established, next, the set value of thefan 14 for the freezing compartment and the set value of thefan 15 for the refrigerating compartment are all set to a maximum value of 5 (step S217 of FIG. Step S103, implementing refrigerating and freezing operation.

利用以上的控制，冷冻室2的时间平均温度维持为大约-19℃，冷藏室3的时间平均温度维持为大约4℃。With the above control, the time-average temperature of thefreezer compartment 2 is maintained at about -19°C, and the time-average temperature of therefrigerator compartment 3 is maintained at about 4°C.

以上说明了本实施方式的冰箱的构造和控制方法，接着针对本实施方式的冰箱所取得的效果进行说明。As mentioned above, the structure and control method of the refrigerator of this embodiment were demonstrated, Next, the effect acquired by the refrigerator of this embodiment is demonstrated.

本实施方式的冰箱1具备收纳冷却器16的冷却器室17、由从冷却器室17通往冷冻室2的冷冻室送风道21和从冷冻室2通往冷却器室17的冷冻室返回风道（冷冻室冷气返回口5）所构成的风道（冷冻室送风道21和冷冻室返回风道总称为“冷冻室侧风道”）、由从冷却器室17通往冷藏室3的冷藏室送风道22和从冷藏室通往冷却器室17的冷藏室返回风道23所构成的风道（冷藏室送风道22和冷藏室返回风道23总称为“冷藏室侧风道”）、使冷气向所述冷冻室侧风道循环的冷冻室用风扇14、以及使冷气向所述冷藏室侧风道循环的冷藏室用风扇15。Therefrigerator 1 of the present embodiment is equipped with acooler compartment 17 for accommodating the cooler 16, a freezercompartment air duct 21 leading from thecooler compartment 17 to thefreezer compartment 2, and a freezer compartment return path leading from thefreezer compartment 2 to thecooler compartment 17. The air duct (freezing compartmentair supply duct 21 and freezing compartment return air duct collectively referred to as "freezing compartment side air duct") formed by the air duct (refrigerated air return port 5) leads from thecooler compartment 17 to therefrigerating compartment 3 The refrigeratingroom air duct 22 and the air duct formed by the refrigerating room returningair duct 23 leading from the refrigerating room to the cooler room 17 (the refrigeratingroom air duct 22 and the refrigerating room returningair duct 23 are collectively referred to as "refrigerating room side wind "), thefreezer fan 14 for circulating cold air to the freezer side air duct, and therefrigerator compartment fan 15 for circulating cold air to the refrigerator side air duct.

在同时驱动冷冻室用风扇14和冷藏室用风扇15并冷却时，控制为调节冷冻室用风扇14的转速和冷藏室用风扇15的转速，使得冷冻室用风扇14的升压能力和冷藏室用风扇15的升压能力之差落入规定范围（图7的步骤S204、S210）。由此，能够提供如下冰箱：能够抑制冷藏室返回冷气向冷冻室2逆流或者冷冻室返回冷气向冷藏室3逆流，在进行冷却运转时，难以发生冷冻室2的温度异常上升、或者冷藏室3的温度局部过于下降这样的事态，箱内被良好冷却。其理由参照图9以及图10进行说明。此处，所谓逆流，是从一个储藏室流出的返回冷气不流向冷却器室17，而是从另一个储藏室的冷气返回口流入的现象。When simultaneously driving thefan 14 for the freezer and thefan 15 for the refrigerator to cool, the control is to adjust the rotation speed of thefan 14 for the freezer and thefan 15 for the refrigerator so that the boosting capacity of thefan 14 for the freezer is the same as that of the refrigerator. The difference in boosting capability of thefan 15 falls within a predetermined range (steps S204 and S210 in FIG. 7 ). Thereby, it is possible to provide a refrigerator that can suppress the backflow of the cold air returned from the refrigerator compartment to thefreezer compartment 2 or the counterflow of the cold air returned from the freezer compartment to therefrigerator compartment 3, and it is difficult for the temperature of thefreezer compartment 2 to rise abnormally or the temperature of therefrigerator compartment 3 to rise during the cooling operation. In such a situation where the temperature drops too much locally, the inside of the box is well cooled. The reason for this will be described with reference to FIGS. 9 and 10 . Here, the so-called reverse flow is a phenomenon in which the returned cold air flowing out from one storage room does not flow into thecooler room 17, but flows in from the cold air return port of the other storage room.

图9a、图9b、图9c是冰箱的风道与冷气流动的模式图，冷却器室17内的冷却器16的下游侧区域为区域0，冷冻室用风扇14的吹出侧区域为区域1，冷藏室用风扇15的吹出侧区域为区域2，冷却器室17内的冷却器16的上游侧区域为区域3。根据冷藏室用风扇15以及冷冻室用风扇14的升压能力的大小关系，区域0~区域3各自的压力P0~P3成为图9a、图9b、图9c的三种状态。Fig. 9a, Fig. 9b, Fig. 9c are the pattern diagrams of the air duct and cold air flow of the refrigerator, the downstream side area of the cooler 16 in thecooler chamber 17 isarea 0, the blowing side area of thefan 14 for the freezer isarea 1, The area on the blowing side of thefan 15 for refrigerator compartment is anarea 2 , and the area on the upstream side of the cooler 16 in thecooler room 17 is anarea 3 . According to the magnitude relationship of the boosting capabilities of thefan 15 for the refrigerator compartment and thefan 14 for the freezer compartment, the respective pressures P0 to P3 in theregions 0 to 3 are in the three states shown in Fig. 9a, Fig. 9b, and Fig. 9c.

图9a表示通过驱动冷藏室用风扇15以及冷冻室用风扇14控制为区域0~区域3各压力P0~P3为P1>P3>P0、P2>P3>P0的状态。由于冷气从压力高的一侧流向低的一侧，所以此时冰箱内的流动形成为图9a中箭头所示。冷冻室2以及冷藏室3中成为被供给与冷却器16进行了换热后的冷气的状态，所以冰箱被良好并且稳定地冷却。Fig. 9a shows the state where the pressures P0-P3 in the regions 0-3 are controlled to be P1>P3>P0, P2>P3>P0 by driving thefan 15 for the refrigerator compartment and thefan 14 for the freezer compartment. Since cold air flows from the side with high pressure to the side with low pressure, the flow in the refrigerator at this time is formed as shown by the arrow in Fig. 9a. Thefreezer compartment 2 and therefrigerator compartment 3 are in a state of being supplied with cold air having exchanged heat with the cooler 16, so the refrigerator is well and stably cooled.

接着，考虑从图9a的状态使冷冻室用风扇14的升压能力相对于冷藏室用风扇15相对降低的情况。例如，从图9a的状态降低冷冻室用风扇14的转速，提高冷藏室用风扇15的转速。该情况下，相对于区域2的压力P2，区域1的压力P1相对降低，图9a的压力关系不再成立，成为P2>P3>P1>P0的状态。Next, consider the case where the pressurization capacity of thefan 14 for freezer compartments is relatively lowered with respect to thefan 15 for refrigerator compartments from the state of FIG. 9a. For example, the rotation speed of thefan 14 for freezer compartments is decreased from the state of FIG. 9a, and the rotation speed of thefan 15 for refrigerator compartments is increased. In this case, the pressure P1 in theregion 1 is relatively lower than the pressure P2 in theregion 2, and the pressure relationship in FIG. 9a no longer holds, and a state of P2>P3>P1>P0 is established.

图9b是表示压力关系处于P2>P3>P1>P0状态的情况下的冷气流动的图。由于冷气从压力高的一侧流向低的一侧，所以由冷藏室用风扇15送出的冷气进入区域3后，向相比区域3的压力P3为低压的区域1和区域0双方流动。因此，向区域1的流动成为从冷冻室冷气返回口5经由冷冻室2流向冷冻室冷气吹出口4侧的逆流（图9b中用虚线箭头所示的流动）。从冷冻室冷气返回口5由于逆流而流入冷冻室2的冷气由于是从冷藏室3流出的返回冷气，所以温度、湿度高，成为冷冻室冷气返回口5附近过度温度上升、非意图的结霜的要因。Fig. 9b is a diagram showing the flow of cold air when the pressure relationship is in the state of P2>P3>P1>P0. Since the cold air flows from the high pressure side to the low side, the cold air sent by thefan 15 for the refrigerator compartment enters thezone 3 and then flows to both thezone 1 and thezone 0, which are lower than the pressure P3 in thezone 3. Therefore, the flow to theregion 1 is a reverse flow from the freezer coolair return port 5 to the freezercool air outlet 4 side through the freezer compartment 2 (the flow indicated by the dotted arrow in FIG. 9 b ). The cold air flowing back into thefreezer 2 from the coldair return port 5 in the freezer is the return air from therefrigerator 3 , so the temperature and humidity are high, resulting in excessive temperature rise near the coldair return port 5 in the freezer and unintended frosting. the main reason.

同样，考虑从图9a的状态使冷冻室用风扇14的升压能力相对于冷藏室用风扇15相对上升的情况。例如，从图9a的状态提高冷冻室用风扇14的转速，降低冷藏室用风扇15的转速。该情况下，相对于区域2的压力P2，区域1的压力P1相对上升，图9a的压力关系不再成立，成为P1>P3>P2>P0的状态。Similarly, the case where the pressure boosting capability of thefan 14 for freezer compartments is relatively increased with respect to thefan 15 for refrigerator compartments from the state of FIG. 9a is considered. For example, the rotation speed of thefan 14 for freezing compartments is increased from the state of FIG. 9a, and the rotation speed of thefan 15 for refrigerator compartments is decreased. In this case, the pressure P1 in theregion 1 rises relatively to the pressure P2 in theregion 2, and the pressure relationship in FIG. 9a no longer holds, and a state of P1>P3>P2>P0 is established.

图9c是表示压力关系处于P1>P3>P2>P0状态情况下的冷气流动的图。该情况下，从冷冻室2流出的返回冷气分为向冷却器16的流动和向冷藏室3逆流的流动。此时，从冷藏室冷气返回口7向冷藏室3逆流的冷气（图9c中用虚线箭头所示的流动）由于是从冷冻室2流出的返回冷气，所以相对于冷藏室3为低温，冷藏室冷气返回口附近被过度冷却，能够成为非意图的食品冻结的要因。如上所述，根据冷藏室用风扇15以及冷冻室用风扇14的升压能力的大小关系，尽管正在驱动冷藏室用风扇15和冷冻室用风扇14双方，也会存在一个储藏室中产生逆流导致冰箱不再被良好冷却的情况。Fig. 9c is a diagram showing the flow of cold air when the pressure relationship is in the state of P1>P3>P2>P0. In this case, the return cold air flowing out from thefreezer compartment 2 is divided into a flow to the cooler 16 and a flow back to therefrigerator compartment 3 . At this time, the cold air flowing back from the coldair return port 7 of the refrigerator compartment to the refrigerator compartment 3 (the flow shown by the dotted arrow in Fig. 9c) is due to the returned cold air flowing out of thefreezer compartment 2, so it is at a low temperature relative to therefrigerator compartment 3. The vicinity of the room-cooled air return port is excessively cooled, which may cause unintentional food freezing. As described above, depending on the magnitude relationship between the boosting capabilities of thefan 15 for the refrigerator and thefan 14 for the freezer, even if both thefan 15 for the refrigerator and thefan 14 for the freezer are being driven, there may be a case where a backflow occurs in one of the storage rooms. A condition where the refrigerator is no longer being cooled well.

于是，在本实施方式的冰箱1中，预先求出使区域0~区域3的各压力P0~P3成为P1>P3>P0、P2>P3>P0关系的冷藏室用风扇15和冷冻室用风扇14的转速的组合，从该组合中选择冷藏和冷冻室冷却运转时的冷藏室用风扇15和冷冻室用风扇14的转速。Therefore, in therefrigerator 1 of the present embodiment, thefan 15 for the refrigerator compartment and the fan for the freezer compartment are obtained in advance so that the respective pressures P0 to P3 in theregions 0 to 3 are in the relationship of P1>P3>P0 and P2>P3>P0. 14 combinations of rotational speeds, and the rotational speeds of therefrigerator compartment fan 15 and thefreezer compartment fan 14 during the refrigeration and freezer compartment cooling operations are selected from the combinations.

图10是表示冰箱1中冷冻室用风扇14的转速设定值1~5和冷藏室用风扇15的转速设定值1~5的组合与逆流有无产生的表。图10中用记号◎、○、Δ所表示的组合为区域0~区域3的各压力P0~P3满足P1>P3>P0、P2>P3>P0的关系的组合，记号◎是不管结霜量如何都不存在逆流的状态，记号○是在结霜量过大的情况下产生逆流的状态，记号Δ是在结霜量大的情况下产生逆流的情况，均是能够进行良好并且稳定的冷却的组合。FIG. 10 is a table showing combinations of rotationspeed setting values 1 to 5 of thefreezer compartment fan 14 and rotationspeed setting values 1 to 5 of therefrigerator compartment fan 15 in therefrigerator 1 and the presence or absence of backflow. The combinations represented by the marks ◎, ○, and Δ in Fig. 10 are the combinations where the pressures P0~P3 in theareas 0~3 meet the relationship of P1>P3>P0, P2>P3>P0, and the marks ◎ are regardless of the amount of frosting In any case, there is no backflow state. The mark ○ is the state of backflow when the amount of frost is too large, and the mark Δ is the case of backflow when the amount of frost is large. Both of them can perform good and stable cooling. The combination.

另一方面，图10中用记号×所表示的组合为区域0~区域3的各压力P0~P3成为P2>P3>P1>P0或者P1>P3>P2>P0导致产生逆流的组合。On the other hand, the combination indicated by the mark X in FIG. 10 is a combination in which the respective pressures P0 to P3 in theregions 0 to 3 are P2>P3>P1>P0 or P1>P3>P2>P0 to cause backflow.

于是，在冰箱1中，通过图7的步骤S204、S210，控制为选择不产生逆流的冷藏室用风扇15和冷冻室用风扇14的转速的组合（图10中记号○所表示的组合），抑制进行冷却运转时冷冻室2的温度异常上升或者冷藏室3的温度局部过于降低这样的问题的发生，良好地进行冷却。Then, in therefrigerator 1, through steps S204 and S210 in FIG. 7, the combination of the rotation speeds of thefan 15 for the refrigerator compartment and thefan 14 for the freezer compartment that does not generate backflow is controlled (the combination indicated by the mark ○ in FIG. 10 ), During the cooling operation, the temperature of thefreezer compartment 2 abnormally rises or the temperature of therefrigerator compartment 3 partially falls excessively, and cooling is performed satisfactorily.

本实施方式的冰箱1具备结霜量推测单元（图7的步骤S203、S209），在同时驱动冷冻室用风扇14和冷藏室用风扇15进行冷却时，在利用结霜量推测单元判定为结霜量多的情况下，控制为调节冷冻室用风扇14的转速和冷藏室用风扇15的转速，使得冷冻室用风扇14的升压能力与冷藏室用风扇15的升压能力之差落入规定范围之内（图7的步骤S301、S303）。由此，能够提供如下冰箱：即使在结霜的情况下，也能够抑制冷藏室返回冷气从冷冻室冷气返回口5流向冷冻室2的逆流、冷冻室返回冷气从冷藏室冷气返回口7流向冷藏室3的逆流，在进行冷却运转时，冷冻室2的温度异常上升或者冷藏室3的温度局部过于降低这样的事态难以发生。理由参照图11a、图11b以及图12进行说明。Therefrigerator 1 of the present embodiment is equipped with a frosting amount estimation unit (steps S203 and S209 in FIG. 7 ), and when thefreezer compartment fan 14 and therefrigerating compartment fan 15 are simultaneously driven for cooling, the frosting amount estimation unit is used to determine that it is frosted. When the amount of frost is large, the control is to adjust the rotation speed of thefan 14 for the freezer compartment and the rotation speed of thefan 15 for the refrigerator compartment so that the difference between the boosting capacity of thefan 14 for the freezer compartment and the boosting capacity of thefan 15 for the refrigerator compartment falls within within the specified range (steps S301 and S303 in FIG. 7 ). Thereby, it is possible to provide a refrigerator in which even in the case of frost, it is possible to suppress the backflow of the cold air returned from the refrigerator compartment from the coldair return port 5 of the freezer compartment to thefreezer compartment 2, and the cold air returned to the freezer compartment from the coldair return port 7 of the refrigerator compartment to the refrigerator compartment. The backflow of thecompartment 3 is unlikely to cause the temperature of the freezingcompartment 2 to rise abnormally or the temperature of therefrigerating compartment 3 to partially drop too much during the cooling operation. The reason will be described with reference to FIG. 11 a , FIG. 11 b and FIG. 12 .

图11a、图11b是表示向冷却器的结霜量和冷冻室风量、冷藏室风量关系的图，图11a表示向冷却器的结霜量少的情况（结霜量小），图11b表示向冷却器的结霜量多的情况（结霜量大）。Fig. 11a and Fig. 11b are graphs showing the relationship between the amount of frost deposited on the cooler and the air volume of the freezer compartment and the air volume of the refrigerator compartment. When there is a lot of frost on the cooler (large amount of frost).

如图11a所示，在向冷却器16的结霜量少的情况下，表示了在维持冷藏室用风扇15的转速一定、使冷冻室用风扇14的转速变化的情况下，在冷冻室用风扇14的转速低的区域A，由于冷冻室用风扇14的升压能力相对小于冷藏室用风扇15的升压能力，所以冷冻室风量为负，产生逆流。也就是，在区域A中，形成图9b所示的流动场。另一方面，表示了在冷冻室用风扇14的转速高的区域B，由于冷冻室用风扇14的升压能力相对大于冷藏室用风扇15的升压能力，所以冷藏室风量为负，产生逆流。也就是，在区域B中，形成图9c所示的流动场。As shown in Fig. 11a, when the amount of frost on the cooler 16 is small, it shows that when the rotational speed of thefan 15 for the refrigerating chamber is kept constant and the rotational speed of thefan 14 for the freezing chamber is changed, the frosting for the freezing chamber is reduced. In the region A where the rotation speed of thefan 14 is low, since the boosting capacity of thefan 14 for the freezer is relatively smaller than that of thefan 15 for the refrigerator, the air volume in the freezer is negative and reverse flow occurs. That is, in the region A, the flow field shown in FIG. 9b is formed. On the other hand, it shows that in the region B where the rotational speed of thefan 14 for the freezer is high, since the boosting capacity of thefan 14 for the freezer is relatively greater than that of thefan 15 for the refrigerator, the air volume in the refrigerator is negative and reverse flow occurs. . That is, in the region B, the flow field shown in FIG. 9c is formed.

另一方面，在结霜量多的情况下，在将冷藏室用风扇15维持为与图11a相同转速、同样使冷冻室用风扇14的转速变化的情况下，如图11b所示，可知冷冻室风量为负的区域A以及区域B扩展。这起因于由于结霜导致冷却器16的通风阻力增加。冷却器16的通风阻力增加后，冷气通过时的压力下降变大，所以图9a所示区域3与区域0之间的压力差变大。因此，相对于P0，P3相对上升，所以容易产生图9b的压力关系P2>P3>P1>P0或者图9c的压力关系P1>P3>P2>P0。也就是，伴随着向冷却器16的结霜量的增加，产生向冷冻室2或者冷藏室3的逆流的风险提高。On the other hand, when there is a lot of frosting, if thefan 15 for the refrigerating compartment is maintained at the same rotational speed as in FIG. Area A and area B where the room air volume is negative expand. This is due to an increase in the ventilation resistance of the cooler 16 due to frost formation. After the ventilation resistance of the cooler 16 increases, the pressure drop when the cold air passes becomes larger, so the pressure difference between thearea 3 and thearea 0 shown in FIG. 9 a becomes larger. Therefore, relative to P0, P3 rises relatively, so it is easy to produce the pressure relationship P2>P3>P1>P0 in Figure 9b or the pressure relationship P1>P3>P2>P0 in Figure 9c. That is, the risk of backflow tofreezer compartment 2 orrefrigerator compartment 3 increases as the amount of frost deposited on cooler 16 increases.

于是，在本实施方式的冰箱1中，不仅在结霜量少的条件下，即使在结霜量多的条件下，也预先求出使区域0~区域3的各压力P0~P3成为P1>P3>P0、P2>P3>P0的关系的冷藏室用风扇15和冷冻室用风扇14的转速的组合，从该组合中选择冷藏和冷冻室冷却运转时的冷藏室用风扇15和冷冻室用风扇14的转速。图10中用记号◎、○所表示的冷冻室用风扇14、冷藏室用风扇15的转速设定值的组合是在结霜量多的条件下区域0~区域3的各压力P0~P3满足P1>P3>P0、P2>P3>P0的关系的组合，是能够良好冷却冰箱的组合。另一方面，图10中用记号Δ、×所表示的组合是在结霜量多的条件下区域0~区域3的各压力P0~P3成为P2>P3>P1>P0或者P1>P3>P2>P0从而发生逆流的组合。于是，在冰箱1中，通过图7的步骤S203、S209判定结霜量，控制为选择不产生逆流的冷藏室用风扇15和冷冻室用风扇14的转速的组合（图12中用记号○所表示的组合）（图7的步骤S301、S303），从而成为进行冷却运转时即使冷却器16结霜也难以发生冷冻室2温度异常上升或者冷藏室3温度局部过于降低这样事态的冰箱。Therefore, in therefrigerator 1 of the present embodiment, not only under the condition of a small amount of frosting, but also under the condition of a large amount of frosting, the pressures P0 to P3 in theregions 0 to 3 are obtained in advance so that the pressures P0 to P3 are P1> P3>P0, P2>P3>P0 the combination of the rotation speed of thefan 15 for the refrigerator compartment and thefan 14 for the freezer compartment, and thefan 15 for the refrigerator compartment and thefan 15 for the freezer compartment during the cooling operation of the refrigerator compartment and the freezer compartment are selected from this combination. The speed of thefan 14. The combination of the rotational speed setting values of thefreezer fan 14 and therefrigerating room fan 15 represented by the marks ◎ and ○ in FIG. The combination of the relationship of P1>P3>P0 and P2>P3>P0 is a combination capable of cooling the refrigerator well. On the other hand, the combinations represented by the marks Δ and × in Fig. 10 are such that the pressures P0 to P3 in theareas 0 to 3 are P2>P3>P1>P0 or P1>P3>P2 under the condition that the amount of frost is large >P0 so that countercurrent occurs. Therefore, in therefrigerator 1, the amount of frosting is determined through steps S203 and S209 in FIG. 7, and the combination of the rotation speeds of thefan 15 for the refrigerator compartment and thefan 14 for the freezer compartment that does not generate backflow is controlled (indicated by the symbol ○ in FIG. 12 ). combination shown) (steps S301 and S303 in FIG. 7 ), thus becoming a refrigerator in which the temperature of thefreezer compartment 2 is unlikely to rise abnormally or the temperature of therefrigerator compartment 3 to partially drop too much even if the cooler 16 is frosted during the cooling operation.

本实施方式的冰箱1在根据同时驱动冷冻室用风扇14和冷藏室用风扇15进行冷却时冷冻室温度传感器51、冷藏室温度传感器52的检测温度的变化检测到逆流的情况下，调节冷冻室用风扇14的转速和冷藏室用风扇15的转速的设定值，使得冷冻室用风扇14的升压能力与冷藏室用风扇15的升压能力之差落入规定范围之内（图7的步骤S206、S212、S302、S304）。具体地，在检测到逆流的情况下，使冷冻室用风扇14的转速和冷藏室用风扇15的转速的设定值为相同值、也就是图10中用记号◎所示的冷冻室用风扇14、冷藏室用风扇15的组合。如上所述，图10中所示记号◎、○是结霜量多的条件下能够良好冷却冰箱的冷冻室用风扇14和冷藏室用风扇15的设定值的组合，记号◎表示结霜进一步增加、即使达到冷却器16的翅间流道接近闭塞的状态也不产生逆流的组合。因此，以图10中记号○、Δ所示的冷冻室用风扇14和冷藏室用风扇15的组合正在实施冷却运转时即便是产生了逆流的情况下，通过检测逆流，选择逆流难以产生的图10中记号◎所示的冷冻室用风扇14和冷藏室用风扇15的组合，就能够使产生逆流的状态不再继续，能够在不产生影响的范围内（冷藏室中产生冻结、或者冷冻食品融化、或者不结霜的范围）恢复到良好的冷却状态。Refrigerator 1 of the present embodiment adjusts the freezer compartment when backflow is detected based on changes in the detected temperatures of freezercompartment temperature sensor 51 and refrigeratingcompartment temperature sensor 52 when thefreezer compartment fan 14 and therefrigerating compartment fan 15 are simultaneously driven for cooling. With the set value of the rotating speed of thefan 14 and the rotating speed of thefan 15 for the refrigerating room, the difference between the boosting capacity of thefan 14 for the freezing room and the boosting capacity of thefan 15 for the refrigerating room falls within the prescribed range (Fig. 7). Steps S206, S212, S302, S304). Specifically, when reverse flow is detected, the set value of the rotational speed of thefan 14 for the freezing compartment and the rotational speed of thefan 15 for the refrigerating compartment are the same value, that is, the fan for the freezing compartment shown by the mark ◎ in FIG. 14. The combination of thefan 15 for the cold room. As mentioned above, the marks ◎ and ○ shown in FIG. 10 are the combination of the setting values of thefreezer fan 14 and therefrigerator fan 15 that can cool the refrigerator well under the condition that there is a lot of frosting. increase, and a combination in which backflow does not occur even when the inter-fin flow passage of the cooler 16 is nearly closed. Therefore, even if backflow occurs when the combination of thefreezer compartment fan 14 and therefrigerator compartment fan 15 shown by the marks ○ and Δ in FIG. The combination of thefan 14 for the freezer compartment and thefan 15 for the refrigerator compartment shown by the mark ◎ in 10 can prevent the state of backflow from continuing, and it can be within the range of no influence (freezing occurs in the refrigerator compartment, or frozen food thawed, or non-frosted range) to return to a well-cooled state.

本实施方式的冰箱1使得冷藏室侧风道的通风阻力大。由此，即便结霜，冰箱也难以产生逆流。以下说明理由。In therefrigerator 1 of the present embodiment, the ventilation resistance of the side air passage of the refrigerator compartment is large. Therefore, even if frost is formed, it is difficult for the refrigerator to generate backflow. The reason is explained below.

通常，在同时冷却冷藏室3和冷冻室2的情况下，设计为向应维持温度高的冷藏室3的送风量相对于冷冻室较低。为了使向冷藏室3的送风量低于向冷冻室2的送风量，可以考虑到相对于冷冻室用风扇14相对降低冷藏室用风扇15的升压能力（以低速）驱动，或者使冷藏室侧风道的通风阻力大于冷冻室侧风道。关于前者，如上所述，在相对于冷冻室用风扇14相对降低冷藏室用风扇15的升压能力并进行驱动的情况下，结霜，并且逆流产生的风险增高，所以，成为容易产生逆流的冰箱。因此，为了使冰箱难以产生逆流，作为使向冷藏室3的送风量低于冷冻室2的措施，优选使冷藏室侧风道的通风阻力大于冷冻室侧风道。Usually, when cooling therefrigerator compartment 3 and thefreezer compartment 2 at the same time, it is designed so that the air flow rate to therefrigerator compartment 3 which should maintain a high temperature is low compared with a freezer compartment. In order to make the air flow rate to therefrigerator compartment 3 lower than that to thefreezer compartment 2, it may be considered to reduce the boosting capacity of thefan 15 for the freezer compartment (at a low speed) relative to thefan 14 for the freezer compartment, or to drive thefan 15 at a low speed. The ventilation resistance of the side air duct of the refrigerator is greater than that of the side air duct of the freezer. Regarding the former, as described above, when the boosting capacity of thefan 15 for the refrigerating room is relatively lower than that of thefan 14 for the refrigerating room and is driven, frost will form and the risk of backflow will increase, so backflow is likely to occur. refrigerator. Therefore, in order to make it difficult for the refrigerator to generate backflow, it is preferable to make the ventilation resistance of the air passage on the refrigerating chamber side larger than that on the air passage on the freezing chamber side as a measure to make the air flow rate to the refrigeratingchamber 3 lower than that of the freezingchamber 2 .

本实施方式的冰箱1在通风阻力大的冷藏室侧风道中具备冷藏室风门27。由此，在确保大的食品收纳空间的同时，能够降低逆流的风险。为了降低逆流的风险，在风道中配设风门是有效的，但是如果配设风门，则相应地不是食品收纳部的无效内容积增加，产生食品收纳空间减少的问题。因此，从确保大的食品收纳空间的观点，不优选在冷藏室风道和冷冻室风道中分别设置风门。于是，在考虑在冷藏室侧风道和冷冻室侧风道中某一方设置风门的情况下，就要选择开口面积与通风阻力的大小均衡的风门。此时，只要是设计为通风阻力相对较大的冷藏室侧风道，则能够配设开口面积较小、紧凑的风门。因此，在为了确保大的食品收纳空间的同时降低逆流的风险而配设风门的情况下，在通风阻力大的冷藏室侧风道配设风门是有效的。Refrigerator 1 according to the present embodiment includesrefrigerator compartment damper 27 in the refrigerator compartment side air duct having a large ventilation resistance. Thereby, while securing a large food storage space, the risk of backflow can be reduced. In order to reduce the risk of backflow, it is effective to provide a damper in the air duct. However, if the damper is provided, the ineffective internal volume of the food storage part increases correspondingly, resulting in a problem that the food storage space decreases. Therefore, from the viewpoint of securing a large food storage space, it is not preferable to separately provide dampers in the refrigerator compartment air duct and the freezer compartment air duct. Therefore, when it is considered to install a damper in one of the side air duct of the refrigerator compartment and the side duct of the freezer compartment, it is necessary to select a damper with a balanced opening area and ventilation resistance. At this time, as long as the side air duct of the refrigerating room is designed to have a relatively large ventilation resistance, a compact damper with a small opening area can be provided. Therefore, when disposing the damper in order to reduce the risk of backflow while securing a large food storage space, it is effective to dispose the damper in the side air duct of the refrigerating room having a large ventilation resistance.

本实施方式的冰箱1利用在向冷却器16的结霜量增多的情况下容易产生逆流的特性，在检测到逆流的情况下实施除霜运转（图7的213~S215）。由此，在向冷却器16的结霜量过度增多之前，能够融化冷却器16的霜，所以在进行冷却运转时，难以发生由于逆流导致冷冻室2温度异常上升或者冷藏室3温度局部过于降低这样的事态，并且能够更加正确地判定是否已经达到了除霜所需的结霜量，所以能够将除霜运转的实施抑制为必要最小限度。因此，能够减少除霜所要的电力量，成为节能性能高的冰箱。Therefrigerator 1 of the present embodiment utilizes the characteristic that backflow is likely to occur when the amount of frost deposited on the cooler 16 increases, and performs a defrosting operation when backflow is detected ( 213 to S215 in FIG. 7 ). As a result, the frost on the cooler 16 can be melted before the amount of frost forming on the cooler 16 increases excessively, so during the cooling operation, it is difficult for the temperature of the freezingcompartment 2 to rise abnormally or the temperature of therefrigerating compartment 3 to partially drop too much due to backflow. In such a situation, it is possible to more accurately determine whether or not the amount of frost required for defrosting has been reached, so that the implementation of the defrosting operation can be suppressed to the necessary minimum. Therefore, the amount of electric power required for defrosting can be reduced, resulting in a refrigerator with high energy-saving performance.

实施例2Example 2

接着，参照图12说明本发明涉及的冰箱的第二实施方式。而且，图12中所示结构以外的结构与第一实施方式的冰箱1相同，因此省略说明。另外，关于图12中与第一实施方式的冰箱1发挥相同功能的要素，赋予相同的符号并省略说明。Next, a second embodiment of the refrigerator according to the present invention will be described with reference to FIG. 12 . Moreover, since the structure other than the structure shown in FIG. 12 is the same as therefrigerator 1 of 1st Embodiment, description is abbreviate|omitted. In addition, in FIG. 12, the same code|symbol is attached|subjected to the element which exhibits the same function as therefrigerator 1 of 1st Embodiment, and description is abbreviate|omitted.

图12是第二实施方式的冰箱的冷气风道的模式图。图12表示在冷藏室风门27为打开状态、冷冻室用风扇14和冷藏室用风扇15均为驱动状态下冷气在冷冻室2和冷藏室3中循环的状态。如图5中箭头所示，利用冷却器16冷却后的冷却器下游侧的区域（区域0）的冷气利用冷冻室用风扇14升压，流入冷冻室用风扇14的吹出侧区域（区域1），经由冷冻室送风道21从冷冻室冷气吹出口4流入冷冻室2。对冷冻室2进行冷却后的冷气经由冷冻室冷气返回口5返回冷却器室17的冷却器16的上游侧的区域（区域3），再次由冷却器16冷却。Fig. 12 is a schematic diagram of a cooling air duct of the refrigerator according to the second embodiment. FIG. 12 shows a state in which cold air circulates in thefreezer compartment 2 and therefrigerator compartment 3 when therefrigerator compartment damper 27 is opened and thefreezer compartment fan 14 and therefrigerator compartment fan 15 are both driven. As shown by the arrow in FIG. 5 , the cold air in the area (area 0 ) on the downstream side of the cooler after being cooled by the cooler 16 is boosted by thefan 14 for the freezer compartment, and flows into the area on the blowing side of thefan 14 for the freezer compartment (area 1 ). , flows into thefreezer compartment 2 from the freezer compartmentcold air outlet 4 through the freezer compartmentair supply duct 21 . The cold air that has cooledfreezer compartment 2 returns to the area (area 3 ) on the upstream side of cooler 16 incooler room 17 through freezer compartment coldair return port 5 , and is cooled by cooler 16 again.

另一方面，由冷却器16冷却后的区域0的冷气的一部分利用冷藏室用风扇15升压，流入冷藏室用风扇15的吹出侧的区域（区域2）。区域2的冷气的一部分经由与区域1连通的压力调整流道60流入区域1，剩余部分经由冷藏室送风道22从冷藏室冷气吹出口6流入冷藏室3。对冷藏室3进行冷却后的冷气从冷藏室冷气返回口7流经冷藏室返回风道23并返回冷却器室17的冷却器16的上游侧区域（区域3），再次由冷却器16冷却。On the other hand, part of the cool air inzone 0 cooled by cooler 16 is pressurized by refrigeratingroom fan 15 and flows into the area on the blowing side of refrigerating room fan 15 (zone 2 ). A part of the cool air inzone 2 flows intozone 1 through the pressure regulating channel 60 communicating withzone 1 , and the rest flows into therefrigerating room 3 through the refrigerating roomair supply channel 22 from the refrigerating roomcold air outlet 6 . The cold air after cooling therefrigerator compartment 3 flows from the refrigerator compartment coldair return port 7 through the refrigerator compartmentreturn air duct 23 and returns to the upstream side area (area 3 ) of the cooler 16 of thecooler compartment 17 , and is cooled by the cooler 16 again.

而且，压力调整流道60的开口面积为200mm²，比从冷藏室送风道22经由冷藏室冷气吹出口6、冷藏室冷气返回口7、冷藏室返回风道23到达冷却器室17的冷藏室侧风道、以及从冷冻室送风道21经由冷冻室冷气吹出口4、冷冻室冷气返回口5到达冷却器室17的冷冻室侧风道的通风阻力都大。Moreover, the opening area of the pressure regulating flow channel 60 is 200 mm² , which is larger than that of therefrigerated air duct 22 from the refrigerating room to thecooler room 17 via the refrigerating roomcold air outlet 6 , the refrigerating room coldair returning port 7 , and the refrigerating room returningair duct 23 . The ventilation resistance of the compartment side air duct and the freezer compartment side air duct from the freezer compartmentair supply duct 21 to thecooler compartment 17 via the freezercool air outlet 4 and the freezer coolair return port 5 is large.

如上所述，第二实施方式的冰箱具备在冷冻室用风扇14的吹出侧区域（区域1）与冷藏室用风扇15的吹出侧区域（区域2）之间连通的压力调整流道60。由此能够提供如下冰箱：能够抑制冷藏室返回冷气向冷冻室2逆流、冷冻室返回冷气向冷藏室3逆流，在进行冷却运转时，冷冻室2的温度异常上升或者冷藏室3的温度局部过于降低这样的事态难以发生，箱内被良好冷却。以下说明理由。As described above, the refrigerator according to the second embodiment includes the pressure adjustment flow path 60 communicating between the blowing-side area (area 1 ) of thefreezer fan 14 and the blowing-side area (area 2 ) of therefrigerating room fan 15 . Thereby, it is possible to provide a refrigerator that can suppress the backflow of cold air returned from the refrigerator compartment to thefreezer compartment 2 and the counterflow of cold air returned from the freezer compartment to therefrigerator compartment 3. It is difficult to reduce such a situation, and the inside of the box is well cooled. The reason is explained below.

设图12所示第二实施方式的冰箱的区域0~区域3的各压力为P0'~P3'，在区域2的压力P2'相对于区域1的压力P1'相对较高的情况下，利用压力调整流道60缓和区域2的压力P2'的上升以及区域1的压力P1'的下降。因此，相比区域3的压力P3'，区域1的压力P1'难以下降，所以成为难以产生向冷冻室2的逆流的冰箱。另外，同样在区域1的压力P1'相对于区域2的压力P2'相对较高的情况下，利用压力调整流道60缓和区域1的压力P1'的上升以及区域2的压力P2'的下降。因此，相比区域3的压力P3'，区域2的压力P2'难以下降，所以成为难以产生向冷藏室3的逆流的冰箱。Assuming that the pressures in theregions 0 to 3 of the refrigerator according to the second embodiment shown in FIG. 12 are P0' to P3', and when the pressure P2' in theregion 2 is relatively higher than the pressure P1' in theregion 1, use The pressure adjustment channel 60 moderates the increase in the pressure P2 ′ in theregion 2 and the decrease in the pressure P1 ′ in theregion 1 . Therefore, since the pressure P1' of the area|region 1 is hard to fall compared with the pressure P3' of the area|region 3, it becomes a refrigerator in which backflow to thefreezer compartment 2 is hard to generate|occur|produce. Also, when the pressure P1 ′ in theregion 1 is relatively higher than the pressure P2 ′ in theregion 2 , the pressure adjustment channel 60 moderates the increase in the pressure P1 ′ in theregion 1 and the decrease in the pressure P2 ′ in theregion 2 . Therefore, since the pressure P2' of the area|region 2 is hard to drop compared with the pressure P3' of the area|region 3, it becomes a refrigerator in which backflow to therefrigerator compartment 3 is hard to generate|occur|produce.

第二实施方式的冰箱中，使压力调整流道60的通风阻力比冷藏室侧风道以及冷冻室侧风道的通风阻力都大。由此，能够向冷冻室2以及冷藏室3供给充足的冷气。压力调整流道60具有压力调整作用并且冷气也从高压侧流向低压侧，例如，如果压力调整流道60的通风阻力小于冷藏室侧风道的通风阻力，则冷藏室用风扇15向冷藏室3送出的冷气经由压力调整流道60大量流向冷冻室用风扇14的吹出区域。因此，发生不再能向冷藏室3输送规定风量这样的事态。另外，在压力调整流道60的通风阻力小于冷冻室侧风道的通风阻力的情况下，也同样产生不再能向冷冻室2输送规定风量这样的问题。于是，在第二实施方式的冰箱中，通过使压力调整流道60的通风阻力比冷藏室侧风道以及冷冻室侧风道的通风阻力都大，从而能够向冷冻室2以及冷藏室3供给充足的冷气。In the refrigerator of the second embodiment, the ventilation resistance of the pressure adjustment flow path 60 is made larger than the ventilation resistances of both the refrigerator compartment side duct and the freezer compartment side duct. Thereby, sufficient cold air can be supplied to freezingroom 2 andrefrigerating room 3 . The pressure regulating channel 60 has a pressure regulating effect and cold air also flows from the high pressure side to the low pressure side. A large amount of the sent cold air flows through the pressure adjustment flow path 60 to the blowing area of thefan 14 for freezing compartment. Therefore, a situation occurs that the predetermined air volume can no longer be sent to therefrigerator compartment 3 . Also, when the ventilation resistance of the pressure regulating flow path 60 is smaller than the ventilation resistance of the freezer-side air path, a problem that a predetermined amount of air cannot be sent to thefreezer compartment 2 similarly arises. Then, in the refrigerator of the second embodiment, by making the ventilation resistance of the pressure regulating flow path 60 larger than the ventilation resistance of both the refrigerator compartment side air duct and the freezer compartment side air duct, it is possible to supply air to thefreezer compartment 2 and therefrigerator compartment 3 . Plenty of air conditioning.

而且，本发明不限定为上述的实施例，还包括各种变形例。例如，在上述实施方式的冰箱中，基于外部空气温度、压缩机驱动时间、门开闭次数来推测结霜量，但是也没有必要一定使用所有条件来进行判定。另外，也可以通过检测例如外部空气湿度、箱内湿度等影响结霜量的其他因素来推测结霜量。在上述实施方式的冰箱中，利用图10所示的表来决定不产生逆流的冷冻室用风扇14和冷藏室用风扇15的转速的组合，但也可以通过例如将不产生逆流的转速范围进行规定来决定冷冻室用风扇14与冷藏室用风扇15之间的关系。并且，在上述实施方式的冰箱中，利用冷冻室温度传感器51以及冷藏室温度传感器52的检测温度来判定逆流，也可以在例如冷冻室冷气返回口5、冷藏室冷气返回口7附近设置用于检测逆流的逆流检测用的温度传感器。另外，可以使用压力传感器来检测图9b、图9c所示的压力分布，从而判定逆流。另外，在上述第二实施方式的冰箱中，具备压力调整流道60，可以通过利用阀等使得压力调整流道60的通风阻力能够改变，从而在检测出逆流的情况下控制为降低通风阻力。也就是，上述实施例是为了易于理解地说明本发明而详细进行的说明，不限定为一定具备所说明的所有结构。In addition, this invention is not limited to the above-mentioned Example, Various modification examples are included. For example, in the refrigerator of the above-mentioned embodiment, the amount of frosting is estimated based on the outside air temperature, the compressor driving time, and the number of door opening and closing times, but it is not necessary to use all the conditions for determination. In addition, the amount of frosting can also be estimated by detecting other factors that affect the amount of frosting, such as the humidity of the outside air and the humidity in the box. In the refrigerator of the above-mentioned embodiment, the combination of the rotational speeds of thefreezer compartment fan 14 and therefrigerating compartment fan 15 that does not cause backflow is determined using the table shown in FIG. The relationship between thefan 14 for a freezer compartment and thefan 15 for a refrigerator compartment is determined according to regulations. In addition, in the refrigerator of the above-mentioned embodiment, the temperature detected by the freezercompartment temperature sensor 51 and the refrigeratingcompartment temperature sensor 52 is used to determine the reverse flow. A temperature sensor for backflow detection that detects backflow. In addition, a pressure sensor can be used to detect the pressure distribution shown in Fig. 9b and Fig. 9c to determine the reverse flow. In addition, in the refrigerator of the above-mentioned second embodiment, the pressure adjustment flow path 60 is provided, and the ventilation resistance of the pressure adjustment flow path 60 can be changed by using a valve or the like, so that the ventilation resistance can be controlled to be reduced when backflow is detected. That is, the above-mentioned embodiments have been described in detail for the purpose of explaining the present invention in an easy-to-understand manner, and are not limited to necessarily having all the described configurations.

Claims (6)

Translated fromChinese

1.一种冰箱，具备作为冷冻温度带室的冷冻室、作为冷藏温度带室的冷藏室、收纳冷却器的冷却器室、从该冷却器室经过所述冷冻室再次返回所述冷却器室的冷冻室冷气风道、从所述冷却器室经过所述冷藏室再次返回所述冷却器室的冷藏室冷气风道、向所述冷冻室冷气风道送风的第一送风机、以及向所述冷藏室冷气风道送风的第二送风机，该冰箱的特征在于，1. A refrigerator comprising a freezer compartment as a freezing temperature zone compartment, a refrigerating compartment as a refrigerating temperature zone compartment, a cooler compartment for accommodating a cooler, and returning to the cooler compartment through the freezer compartment from the cooler compartment The cold air duct of the freezer compartment, the cold air duct of the refrigerator compartment from the cooler compartment through the refrigerator compartment and back to the cooler compartment, the first air blower for supplying air to the cold air duct of the freezer compartment, and the first air blower for supplying air to all The second air blower for air supply in the cold air duct of the refrigerator is described, and the refrigerator is characterized in that,设定或者调整所述第一送风机以及所述第二送风机的转速组合，使得所述第一送风机的吹出区域压力P1、所述第二送风机的吹出区域压力P2、所述冷却器室的所述冷却器的上游压力P3、所述冷却器室的所述冷却器的下游压力P0之间的关系成为P1>P3>P0以及P2>P3>P0。Set or adjust the rotation speed combination of the first blower and the second blower so that the pressure P1 of the blowing area of the first blower, the pressure P2 of the blowing area of the second blower, the pressure of the cooler chamber The relationship between the upstream pressure P3 of the cooler and the downstream pressure P0 of the cooler of the cooler chamber is P1>P3>P0 and P2>P3>P0.2.根据权利要求1所述的冰箱，其特征在于，2. The refrigerator according to claim 1, characterized in that,具备检测所述冷却器的结霜量的结霜量检测单元或者推测所述冷却器的结霜量的结霜量推测单元，基于所述结霜量检测单元或者所述结霜量推测单元，设定所述第一送风机以及所述第二送风机的转速。A frosting amount detecting unit that detects a frosting amount of the cooler or a frosting amount estimating unit that estimates a frosting amount of the cooler is provided, based on the frosting amount detecting unit or the frosting amount estimating unit, The rotation speeds of the first air blower and the second air blower are set.3.根据权利要求1所述的冰箱，其特征在于，3. The refrigerator according to claim 1, characterized in that,具备对从所述冷藏室的冷气返回口或者所述冷冻室的冷气返回口流入的逆流进行检测的逆流检测单元，在检测到所述逆流的情况下，设定所述第一送风机以及所述第二送风机的转速，从而恢复到不产生所述逆流的状态。A reverse flow detection unit is provided for detecting a reverse flow flowing in from the cold air return port of the refrigerator compartment or the cold air return port of the freezer compartment, and when the reverse flow is detected, the first air blower and the The rotation speed of the second air blower is thus restored to the state where the reverse flow is not generated.4.根据权利要求1至3中任一项所述的冰箱，其特征在于，4. The refrigerator according to any one of claims 1 to 3, characterized in that,使所述冷藏室冷气风道的通风阻力相对大于所述冷冻室冷气风道。The ventilation resistance of the cold air duct of the refrigerating chamber is relatively greater than that of the cold air duct of the freezing chamber.5.根据权利要求4所述的冰箱，其特征在于，5. The refrigerator according to claim 4, characterized in that,在所述冷藏室冷气风道设有通风阻力调整单元。A ventilation resistance adjustment unit is provided in the cold air duct of the refrigerator compartment.6.一种冰箱，具备冷却器、融化所述冷却器的霜的除霜单元、作为冷冻温度带室的冷冻室、作为冷藏温度带室的冷藏室、收纳所述冷却器的冷却器室、从所述冷却器室经过所述冷冻室再次返回所述冷却器室的冷冻室冷气风道、从所述冷却器室经过所述冷藏室再次返回所述冷却器室的冷藏室冷气风道、向所述冷冻室冷气风道流动冷气的冷冻室送风机、以及向所述冷藏室冷气风道流动冷气的冷藏室送风机，该冰箱的特征在于，6. A refrigerator comprising a cooler, a defrosting unit for melting frost in the cooler, a freezer compartment as a room in a freezing temperature zone, a refrigerator compartment as a room in a refrigeration temperature zone, a cooler compartment for accommodating the cooler, The cold air duct of the freezer compartment that passes through the freezer compartment from the cooler compartment and returns to the cooler compartment, the cold air duct of the refrigerator compartment that returns from the cooler compartment to the cooler compartment through the refrigerator compartment, A freezer compartment blower that flows cold air into the freezer cool air duct, and a refrigerator compartment blower that flows cold air into the refrigerator cool air duct, wherein the refrigerator is characterized in that具备对流向所述冷藏室的冷气返回口或者所述冷冻室的冷气返回口的逆流进行检测的逆流检测单元，基于所述逆流检测单元实施所述除霜单元的除霜运转。A backflow detection unit that detects backflow to the cold air return port of the refrigerator compartment or the cold air return port of the freezer compartment is provided, and the defrosting operation of the defrosting unit is performed based on the backflow detection unit.

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