CN102243005A - Defrosting control method of air-cooling refrigerator evaporator - Google Patents

Abstract

Translated fromChinese

本发明属于电器设备技术领域，特别涉及一种风冷冰箱蒸发器化霜控制方法。该控制方法采用电加热器间隙加热实现对蒸发器的除霜控制，具体包括下列步骤：步骤1、开始化霜时，电加热器先加热t1时间，当电加热器表面温度达到T1后，停止加热t2时间；步骤2、再加热t3时间，停止加热t4时间；步骤3、再加热t5时间，停止加热t6；如此间隙性加热，一直到退出化霜。本发明采用电加热器间隙加热的方式控制化霜，能够有效地利用电加热器停止加热时表面的余热，来进行对蒸发器的除霜，减少电加热器加热时带入箱内的热量，提高化霜效率，降低能耗。

The invention belongs to the technical field of electrical equipment, and in particular relates to a defrosting control method for an evaporator of an air-cooled refrigerator. The control method adopts gap heating of the electric heater to realize the defrosting control of the evaporator, and specifically includes the following steps: Step 1. When defrosting is started, the electric heater is first heated for t1 time, and when the surface temperature of the electric heater reaches T1, stop Heating for t2 time; step 2, reheat for t3 time, stop heating for t4 time; step 3, reheat for t5 time, stop heating for t6 time; heat intermittently until exiting defrosting. The present invention controls defrosting by means of electric heater gap heating, can effectively use the waste heat on the surface when the electric heater stops heating, to defrost the evaporator, reduce the heat brought into the box when the electric heater is heated, Improve defrosting efficiency and reduce energy consumption.

Description

Translated fromChinese

一种风冷冰箱蒸发器化霜控制方法A method for controlling defrosting of an air-cooled refrigerator evaporator

技术领域technical field

本发明属于电器设备技术领域，特别涉及一种风冷冰箱蒸发器化霜控制方法。The invention belongs to the technical field of electrical equipment, and in particular relates to a defrosting control method for an evaporator of an air-cooled refrigerator.

背景技术Background technique

风冷冰箱俗称无霜冰箱，蒸发器上结的霜靠电加热加热自动除霜，而不需要人工除霜。Air-cooled refrigerators are commonly known as frost-free refrigerators. The frost formed on the evaporator is automatically defrosted by electric heating without manual defrosting.

结霜过程：启动压缩机，蒸发器制冷，吸收箱内的水蒸汽，在蒸发器表面先形成一层薄霜，经过一段时间的开停制冷，蒸发器的霜层加厚，充满整个蒸发器翅片间的间隙，此时需要去除蒸发器上的霜，冰箱才能正常工作。压缩机停止工作，电加热自动加热，一直加热到蒸发器上的霜没有，停止加热几分钟后，压缩机再重新启动制冷。Frosting process: Start the compressor, the evaporator is refrigerated, absorbs the water vapor in the box, and forms a thin layer of frost on the surface of the evaporator. After a period of on-off cooling, the frost layer of the evaporator thickens and fills the entire evaporator. At this time, the frost on the evaporator needs to be removed, so that the refrigerator can work normally. The compressor stops working, and the electric heater automatically heats up until there is no frost on the evaporator. After stopping the heating for a few minutes, the compressor restarts to refrigerate.

加热器化霜加热控制通常的方式：加热时一直工作，直至化霜结束。采用这种方式化霜，消耗很大的能耗，而且效率不高。The usual way of heater defrost heating control: it works all the time during heating until the end of defrosting. Adopting this method to defrost consumes a lot of energy, and the efficiency is not high.

发明内容Contents of the invention

本发明要解决的问题是提供一种风冷冰箱蒸发器化霜控制方法，其利用电加热器表面余热来加热蒸发器进行化霜，以提高化霜效率，降低能耗。The problem to be solved by the present invention is to provide a defrosting control method for an evaporator of an air-cooled refrigerator, which uses the waste heat on the surface of an electric heater to heat the evaporator for defrosting, so as to improve the defrosting efficiency and reduce energy consumption.

为实现上述目的，本发明的技术方案为：一种风冷冰箱蒸发器化霜控制方法，采用电加热器间隙加热实现对蒸发器的除霜控制，具体包括下列步骤：In order to achieve the above object, the technical solution of the present invention is: a defrosting control method for the evaporator of an air-cooled refrigerator, which uses electric heater gap heating to realize the defrosting control of the evaporator, specifically including the following steps:

步骤1、开始化霜时，电加热器先加热t1时间，当电加热器表面温度达到T1后，停止加热t2时间；Step 1. When defrosting starts, the electric heater is heated for t1 time, and when the surface temperature of the electric heater reaches T1, stop heating for t2 time;

步骤2、再加热t3时间，停止加热t4时间；Step 2, reheat for t3 time, stop heating for t4 time;

步骤3、再加热t5时间，停止加热t6；如此间隙性加热，一直到退出化霜。Step 3. Reheat for t5, stop heating for t6; heat intermittently until defrost exits.

上述方案中，t1 至t6的大小根据电加热器的样式、电加热功率、冰箱大小等情况适当调整，具体如下：In the above scheme, the size of t1 to t6 is properly adjusted according to the style of electric heater, electric heating power, size of refrigerator, etc., as follows:

当电加热器为钢管/石英管，且其功率小于100W时，所述t1≥5min，t2≥30s，t3≥30s，t4≥30s，t5≥30s，t6≥30s，T1≥60℃。When the electric heater is a steel pipe/quartz tube, and its power is less than 100W, t1≥5min, t2≥30s, t3≥30s, t4≥30s, t5≥30s, t6≥30s, T1≥60°C.

当电加热器为钢管/石英管，且其功率在100W至200W之间时，所述t1≥4min，t2≥30s，t3≥30s，t4≥30s，t5≥30s，t6≥30s，T1≥70℃。When the electric heater is a steel pipe/quartz tube, and its power is between 100W and 200W, the t1≥4min, t2≥30s, t3≥30s, t4≥30s, t5≥30s, t6≥30s, T1≥70 ℃.

当电加热器为钢管/石英管，且其功率在大于200W时，所述t1≥3min，t2≥30s，t3≥30s，t4≥30s，t5≥30s，t6≥30s，T1≥80℃。When the electric heater is a steel tube/quartz tube, and its power is greater than 200W, the t1≥3min, t2≥30s, t3≥30s, t4≥30s, t5≥30s, t6≥30s, T1≥80°C.

当电加热器为铝管，且其功率在小于100W时，所述t1≥7min，t2≥30s，t3≥30s，t4≥30s，t5≥30s，t6≥30s，T1≥10℃。When the electric heater is an aluminum tube and its power is less than 100W, t1≥7min, t2≥30s, t3≥30s, t4≥30s, t5≥30s, t6≥30s, T1≥10°C.

当电加热器为铝管，且其功率在100W至200W之间时，所述t1≥6min，t2≥30s，t3≥30s，t4≥30s，t5≥30s，t6≥30s，T1≥15℃。When the electric heater is an aluminum tube, and its power is between 100W and 200W, said t1≥6min, t2≥30s, t3≥30s, t4≥30s, t5≥30s, t6≥30s, T1≥15°C.

当电加热器为铝管，且其功率在大于200W时，所述t1≥5min，t2≥30s，t3≥30s，t4≥30s，t5≥30s，t6≥30s，T1≥20℃。When the electric heater is an aluminum tube and its power is greater than 200W, said t1≥5min, t2≥30s, t3≥30s, t4≥30s, t5≥30s, t6≥30s, T1≥20°C.

当电加热器为钢管，且其功率为400W时，所述t1≥5min，t2≥1min，t3≥2min，t4≥1min，t5≥2min，t6≥1min，T1≥80℃。When the electric heater is a steel pipe and its power is 400W, said t1≥5min, t2≥1min, t3≥2min, t4≥1min, t5≥2min, t6≥1min, T1≥80°C.

与现有技术相比，本发明具有如下有益效果：Compared with the prior art, the present invention has the following beneficial effects:

本发明采用电加热器间隙加热的方式控制化霜，能够有效地利用电加热器停止加热时表面的余热，来进行对蒸发器的除霜，减少电加热器加热时带入箱内的热量，提高化霜效率，降低能耗。The present invention controls defrosting by means of electric heater gap heating, can effectively use the waste heat on the surface when the electric heater stops heating, to defrost the evaporator, reduce the heat brought into the box when the electric heater is heated, Improve defrosting efficiency and reduce energy consumption.

附图说明Description of drawings

图1 为本发明间隙加热曲线图；Fig. 1 is gap heating curve figure of the present invention;

图2为图1中化霜周期A→B功率的放大图。Fig. 2 is an enlarged diagram of the defrosting cycle A→B power in Fig. 1.

具体实施方式Detailed ways

以下结合实施例及附图对本发明进行详细的描述。The present invention will be described in detail below in conjunction with the embodiments and accompanying drawings.

如图1所示，本发明公开了一种风冷冰箱蒸发器化霜控制方法，该方法采用电加热器间隙加热实现对蒸发器的除霜控制，具体包括下列步骤：As shown in Figure 1, the present invention discloses a defrosting control method for an evaporator of an air-cooled refrigerator. The method adopts gap heating of an electric heater to realize the defrosting control of the evaporator, and specifically includes the following steps:

步骤1、开始化霜时，电加热器先加热t1时间，当电加热器表面温度达到T1后，停止加热t2时间；Step 1. When defrosting starts, the electric heater is heated for t1 time, and when the surface temperature of the electric heater reaches T1, stop heating for t2 time;

步骤2、再加热t3时间，停止加热t4时间；Step 2, reheat for t3 time, stop heating for t4 time;

步骤3、再加热t5时间，停止加热t6；如此间隙性加热，一直到退出化霜。Step 3. Reheat for t5, stop heating for t6; heat intermittently until defrost exits.

t1 至t6的大小根据电加热器的样式、电加热功率、冰箱大小等情况适当调整，如图2所示，具体如下：The size of t1 to t6 should be properly adjusted according to the style of electric heater, electric heating power, refrigerator size, etc., as shown in Figure 2, and the details are as follows:

当电加热器为钢管/石英管，且其功率小于100W时，所述t1≥5min，t2≥30s，t3≥30s，t4≥30s，t5≥30s，t6≥30s，T1≥60℃。When the electric heater is a steel pipe/quartz tube, and its power is less than 100W, t1≥5min, t2≥30s, t3≥30s, t4≥30s, t5≥30s, t6≥30s, T1≥60°C.

当电加热器为钢管/石英管，且其功率在100W至200W之间时，所述t1≥4min，t2≥30s，t3≥30s，t4≥30s，t5≥30s，t6≥30s，T1≥70℃。When the electric heater is a steel pipe/quartz tube, and its power is between 100W and 200W, the t1≥4min, t2≥30s, t3≥30s, t4≥30s, t5≥30s, t6≥30s, T1≥70 ℃.

当电加热器为钢管/石英管，且其功率在大于200W时，所述t1≥3min，t2≥30s，t3≥30s，t4≥30s，t5≥30s，t6≥30s，T1≥80℃。When the electric heater is a steel tube/quartz tube, and its power is greater than 200W, the t1≥3min, t2≥30s, t3≥30s, t4≥30s, t5≥30s, t6≥30s, T1≥80°C.

当电加热器为铝管，且其功率在小于100W时，所述t1≥7min，t2≥30s，t3≥30s，t4≥30s，t5≥30s，t6≥30s，T1≥10℃。When the electric heater is an aluminum tube and its power is less than 100W, t1≥7min, t2≥30s, t3≥30s, t4≥30s, t5≥30s, t6≥30s, T1≥10°C.

当电加热器为铝管，且其功率在100W至200W之间时，所述t1≥6min，t2≥30s，t3≥30s，t4≥30s，t5≥30s，t6≥30s，T1≥15℃。When the electric heater is an aluminum tube, and its power is between 100W and 200W, said t1≥6min, t2≥30s, t3≥30s, t4≥30s, t5≥30s, t6≥30s, T1≥15°C.

当电加热器为铝管，且其功率在大于200W时，所述t1≥5min，t2≥30s，t3≥30s，t4≥30s，t5≥30s，t6≥30s，T1≥20℃。When the electric heater is an aluminum tube and its power is greater than 200W, said t1≥5min, t2≥30s, t3≥30s, t4≥30s, t5≥30s, t6≥30s, T1≥20°C.

当电加热器为钢管，且其功率为400W时，所述t1≥5min，t2≥1min，t3≥2min，t4≥1min，t5≥2min，t6≥1min，T1≥80℃。When the electric heater is a steel pipe and its power is 400W, said t1≥5min, t2≥1min, t3≥2min, t4≥1min, t5≥2min, t6≥1min, T1≥80°C.

图1中，线1为冷藏温度线，线2为冷冻温度线，线3为功率曲线，In Figure 1, line 1 is the refrigeration temperature line, line 2 is the freezing temperature line,line 3 is the power curve,

A→C 为一个运行周期，A→B为化霜周期，举例说明A→B如何控制：A→C is a running cycle, A→B is a defrosting cycle, how to control A→B as an example:

以400W化霜功率的钢管电加热为例,采用间隙加热:Take the steel pipe electric heating with 400W defrosting power as an example, using gap heating:

加热t1=5分钟后,停t2=1分钟,再加热t3=2分钟,停t4=1分钟,再加热t4=2分钟,停t5=1分钟,再加热t5=2分钟,停t6=1分钟,再加热t7=1分钟后退出化霜,化霜过程中加热器累计加热12分钟,不加热4分钟。After heating for t1=5 minutes, stop for t2=1 minute, reheat for t3=2 minutes, stop for t4=1 minute, reheat for t4=2 minutes, stop for t5=1 minute, reheat for t5=2 minutes, stop for t6=1 Minutes, reheat for t7=1 minute and exit defrosting. During defrosting, the heater will heat for 12 minutes and not heat for 4 minutes.

若采用一直加热,电加热加热约15分钟;对比这两种形式，间隙式电加热省电[0.4*(15-12)/60]*2=0.04kwh/24h，约下降3%的耗电。If constant heating is used, electric heating will heat for about 15 minutes; compared with these two forms, intermittent electric heating saves power [0.4*(15-12)/60]*2=0.04kwh/24h, reducing power consumption by about 3% .

间隙加热形式，5分钟后电加热表面温度达390℃，停止加热1分钟后表面温度下降约20℃，假定钢管加热器为黑体，加热器向空间发射的辐射能为Q=σb*A*T4(σb黑体辐射常数,其值为5.67*10-8W/(m2.K4；A为电加热参与辐射的表面积m2；T为表面温度K)。In the form of gap heating, the surface temperature of electric heating reaches 390°C after 5 minutes, and the surface temperature drops by about 20°C after stopping heating for 1 minute. Assuming that the steel pipe heater is a black body, the radiant energy emitted by the heater to the space is Q=σb*A*T4 (σb black body radiation constant, its value is 5.67*10-8W/(m2.K4; A is the surface area m2 of electric heating participating in radiation; T is the surface temperature K).

间隙加热与一直加热的单位时间辐射能比：Q间：Q一直=(T间/T一直)4=（643/663）4=88.5%。The ratio of radiant energy per unit time between gap heating and constant heating: between Q: Q all the time=(T between/T all the time)4=(643/663)4=88.5%.

间隙加热与一直加热总辐射能比：Q间：Q一直=88.5%*（11分钟/10分钟）=97.3%。The total radiant energy ratio of gap heating and constant heating: between Q: Q=88.5%*(11 minutes/10 minutes)=97.3%.

间隙加热和一直加热形式，电加热总辐射能相当。The total radiant energy of electric heating is equivalent to gap heating and continuous heating.

本发明间隙式加热方式适用于多种电加热形式，比如钢管加热管、石英加热管、铝管加热管，该间隙式加热方式也不受加热管功率的影响，但考虑200L以上的冰箱的化霜时箱内温度回升，一般功率不小于100W,同时考虑安全因素，电加热功率一般不大于450W。The gap heating method of the present invention is applicable to various electric heating forms, such as steel pipe heating tubes, quartz heating tubes, and aluminum tube heating tubes. When the temperature in the box rises during frost, the general power is not less than 100W, and considering the safety factor, the electric heating power is generally not more than 450W.

本发明采用间隙式加热方式，能提高化霜效率，降低能耗约3%。The present invention adopts the intermittent heating method, which can improve the defrosting efficiency and reduce energy consumption by about 3%.

Claims (8)

1. a wind cooling refrigerator evaporimeter defrosting control method is characterized in that: adopt the heating of electric heater gap to realize the defrosting of evaporimeter is controlled, specifically comprise the following steps:

When step 1, beginning defrost, electric heater is the heating t1 time earlier, after the electric heater surface temperature reaches T1, stops to heat the t2 time;

Step 2, heat the t3 time again, stop to heat the t4 time;

Step 3, heat the t5 time again, stop to heat t6; So intermittence heating is until withdraw from defrost.

2. wind cooling refrigerator evaporimeter defrosting control method according to claim 1 is characterized in that: electric heater is steel pipe/quartz ampoule, and its power is during less than 100W, described t1 〉=5min, t2 〉=30s, t3 〉=30s, t4 〉=30s, t5 〉=30s, t6 〉=30s, T1 〉=60 ℃.

3. wind cooling refrigerator evaporimeter defrosting control method according to claim 1 is characterized in that: electric heater is steel pipe/quartz ampoule, and its power is between 100W to 200W the time, described t1 〉=4min, t2 〉=30s, t3 〉=30s, t4 〉=30s, t5 〉=30s, t6 〉=30s, T1 〉=70 ℃.

4. wind cooling refrigerator evaporimeter defrosting control method according to claim 1 is characterized in that: electric heater is steel pipe/quartz ampoule, and its power is greater than 200W the time, described t1 〉=3min, t2 〉=30s, t3 〉=30s, t4 〉=30s, t5 〉=30s, t6 〉=30s, T1 〉=80 ℃.

5. wind cooling refrigerator evaporimeter defrosting control method according to claim 1 is characterized in that: electric heater is an aluminum pipe, and its power is less than 100W the time, described t1 〉=7min, t2 〉=30s, t3 〉=30s, t4 〉=30s, t5 〉=30s, t6 〉=30s, T1 〉=10 ℃.

6. wind cooling refrigerator evaporimeter defrosting control method according to claim 1 is characterized in that: electric heater is an aluminum pipe, and its power is between 100W to 200W the time, described t1 〉=6min, t2 〉=30s, t3 〉=30s, t4 〉=30s, t5 〉=30s, t6 〉=30s, T1 〉=15 ℃.

7. wind cooling refrigerator evaporimeter defrosting control method according to claim 1 is characterized in that: electric heater is an aluminum pipe, and its power is greater than 200W the time, described t1 〉=5min, t2 〉=30s, t3 〉=30s, t4 〉=30s, t5 〉=30s, t6 〉=30s, T1 〉=20 ℃.

8. wind cooling refrigerator evaporimeter defrosting control method according to claim 1 is characterized in that: electric heater is a steel pipe, and its power is when being 400W, described t1 〉=5min, t2 〉=1min, t3 〉=2min, t4 〉=1min, t5 〉=2min, t6 〉=1min, T1 〉=80 ℃.

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