CN103375401A - Hermetic compressor - Google Patents

Abstract

Translated fromChinese

本发明提供一种减少过压缩损失的密闭型电动压缩机。本发明的密闭型电动压缩机具备溢流阀装置(15)，该溢流阀装置(15)对以使压缩室与喷出压室连通的方式设置的溢流流路(26)进行开闭，溢流阀装置(15)具有：阀芯(15d)，其以对溢流流路(26)进行开闭的方式设置；施力构件(15e)，其以使溢流流路(26)成为闭状态的方式对阀芯(15d)施力；限动件(25)，其安装有施力构件(15e)；保持器(16)，其将限动件(25)保持在溢流流路(26)内，其中，限动件(25)具有从其中央部朝向溢流流路(26)的内壁呈放射状地突出的多个突出部(25b)，在突出部(25b)彼此之间形成有制冷剂通路(15g)。

The invention provides a hermetic electric compressor with reduced overcompression loss. The hermetic electric compressor of the present invention is provided with a relief valve device (15) that opens and closes a relief flow passage (26) provided to communicate the compression chamber and the discharge pressure chamber. , The overflow valve device (15) has: a spool (15d), which is set to open and close the overflow flow path (26); a force member (15e), which makes the overflow flow path (26) The spool (15d) is forced to become a closed state; the stopper (25) is equipped with a force applying member (15e); the retainer (16) keeps the stopper (25) in the overflow flow In the passage (26), wherein, the stopper (25) has a plurality of protrusions (25b) protruding radially from its central part toward the inner wall of the overflow flow passage (26), between the protrusions (25b) A refrigerant passage (15g) is formed between them.

Description

Translated fromChinese

密闭型电动压缩机Hermetic Electric Compressor

技术领域technical field

本发明涉及密闭型电动压缩机。The present invention relates to a hermetic electric compressor.

背景技术Background technique

通常，使用于室内空调装置等的密闭型电动压缩机在大范围的运转条件下，无法避免气体制冷剂的过压缩或液体制冷剂压缩的状态下的运转、即、无法避免对密闭型电动压缩机的压缩机构部的过负载状态的运转。因此，需要一种能够耐受这种运转的结构的密闭型电动压缩机。Generally, under a wide range of operating conditions, a hermetic electric compressor used in a room air conditioner cannot avoid overcompression of the gas refrigerant or operation in a state where the liquid refrigerant is compressed The operation of the overload state of the compression mechanism of the machine. Therefore, there is a need for a hermetic electric compressor with a structure capable of withstanding such operation.

以往，作为具有气体制冷剂的过压缩防止结构及液体压缩防止结构的密闭型电动压缩机，列举有例如专利文献1公开的技术。该密闭型电动压缩机在具有吸入口和喷出口的密闭容器内收纳有电动机部和压缩机构部。压缩机构部使回旋涡盘与具有涡卷状的制冷剂通路的固定涡盘啮合而形成压缩室。Conventionally, as a hermetic electric compressor having a gas refrigerant overcompression prevention structure and a liquid compression prevention structure, for example, the technique disclosed in Patent Document 1 is cited. In this hermetic electric compressor, a motor unit and a compression mechanism unit are accommodated in a hermetic container having a suction port and a discharge port. The compression mechanism unit forms a compression chamber by meshing an orbiting scroll with a fixed scroll having a scroll-shaped refrigerant passage.

并且，该密闭型电动压缩机在固定涡盘的台板上设有将压缩室与喷出压室连结的溢流阀装置。该溢流阀装置配置在使压缩室与喷出压室连通的溢流流路内，溢流流路将溢流孔、阀室、及限动件插入部从压缩室侧朝向喷出压室侧依次同心地排列而形成。In addition, in this hermetic electric compressor, a relief valve device is provided on the base plate of the fixed scroll to connect the compression chamber and the discharge pressure chamber. The relief valve device is disposed in the relief flow path that communicates the compression chamber and the discharge pressure chamber, and the relief flow path connects the relief hole, the valve chamber, and the stopper insertion portion from the compression chamber side to the discharge pressure chamber. The sides are concentrically arranged in sequence and formed.

该溢流阀装置是一种止回阀，在压缩行程的中途，在压缩室内的压力成为喷出压力以上的过压缩时、或根据运转时的温度条件等而从吸入口吸入液体制冷剂的液体压缩时等，将溢流流路打开。此时，制冷剂经由形成于限动件的贯通孔而向喷出压室流动，其中该限动件配置于限动件插入部。This relief valve device is a check valve that draws in liquid refrigerant from the suction port when the pressure in the compression chamber becomes overcompressed to a level higher than the discharge pressure in the middle of the compression stroke, or due to temperature conditions during operation, etc. When liquid is compressed, etc., open the overflow flow path. At this time, the refrigerant flows into the discharge pressure chamber through the through hole formed in the stopper disposed in the stopper insertion portion.

【在先技术文献】【Prior technical literature】

【专利文献】【Patent Literature】

【专利文献1】日本特开2010-270762号公报[Patent Document 1] Japanese Patent Laid-Open No. 2010-270762

然而，在上述的密闭型电动压缩机(例如，参照专利文献1)中，如上述那样，制冷剂经由限动件的狭窄的贯通孔而流动，因此存在无法高效率地使制冷剂向喷出压室逃散的问题。因此，以往的密闭型电动压缩机存在因过压缩损失而消耗电力增加的问题。However, in the above-mentioned hermetic electric compressor (for example, refer to Patent Document 1), since the refrigerant flows through the narrow through-hole of the stopper as described above, there is a problem that the refrigerant cannot be efficiently discharged to the The problem of escape from the room. Therefore, the conventional hermetic electric compressor has a problem of increased power consumption due to overcompression loss.

发明内容Contents of the invention

因此，本发明的课题在于提供一种减少过压缩损失的密闭型电动压缩机。Therefore, an object of the present invention is to provide a hermetic electric compressor with reduced overcompression loss.

解决所述课题的密闭型电动压缩机的特征在于，具备：压缩机构部，其使回旋涡盘与固定涡盘啮合而形成压缩室，且对吸入到所述压缩室内的制冷剂进行压缩；密闭容器，其收纳所述压缩机构部，且具有将由所述压缩室压缩过的制冷剂喷出的喷出压室；溢流流路，其以使所述压缩室与所述喷出压室连通的方式形成于所述固定涡盘；溢流阀装置，其配置在所述溢流流路内，当所述压缩室的压力上升得高于设定压力时进行开路，以将所述压缩室与所述喷出压室连通，所述溢流阀装置具有：阀芯，其以对所述溢流流路进行开闭的方式设置；施力构件，其以使所述溢流流路成为闭状态的方式对所述阀芯施力；限动件，其安装有所述施力构件；保持器，其将所述限动件保持在所述溢流流路内，其中，所述限动件具有从该限动件的中央部朝向所述溢流流路的内壁呈放射状地突出的多个突出部，在所述突出部彼此之间形成有制冷剂通路。The hermetic electric compressor that solves the above-mentioned problems is characterized in that it includes: a compression mechanism unit that engages an orbiting scroll and a fixed scroll to form a compression chamber, and compresses refrigerant sucked into the compression chamber; a container that accommodates the compression mechanism unit and has a discharge pressure chamber that discharges the refrigerant compressed by the compression chamber; and an overflow flow path that communicates the compression chamber with the discharge pressure chamber Formed in the fixed scroll in a manner; the overflow valve device, which is arranged in the overflow flow path, opens the circuit when the pressure of the compression chamber rises higher than the set pressure, so that the compression chamber In communication with the discharge pressure chamber, the overflow valve device includes: a valve core configured to open and close the overflow flow path; a biasing member configured to make the overflow flow path force the spool in a closed state; a stopper, which is equipped with the force applying member; a retainer, which keeps the stopper in the overflow flow path, wherein the stopper The movable member has a plurality of protrusions radially protruding from the central portion of the stopper toward the inner wall of the overflow flow path, and a refrigerant passage is formed between the protrusions.

【发明效果】【Invention effect】

根据本发明，能够提供一种减少过压缩损失的密闭型电动压缩机。According to the present invention, it is possible to provide a hermetic electric compressor with reduced overcompression loss.

附图说明Description of drawings

图1是本发明的第一实施方式的密闭型电动压缩机的纵向剖视图。Fig. 1 is a longitudinal sectional view of a hermetic electric compressor according to a first embodiment of the present invention.

图2是表示图1的密闭型电动压缩机的回旋涡盘与固定涡盘啮合的情况的固定涡盘的背视图。Fig. 2 is a rear view of the fixed scroll showing a meshing state of the orbiting scroll and the fixed scroll of the hermetic electric compressor shown in Fig. 1 .

图3是图1的密闭型电动压缩机的固定涡盘的俯视图。Fig. 3 is a plan view of a fixed scroll of the hermetic electric compressor of Fig. 1 .

图4(a)是与图3的IV-IV剖面对应的闭阀状态的溢流阀装置的剖视图，(b)是表示省略了保持器的记载的闭阀状态的溢流阀装置的、在固定涡盘包含有局部剖切剖面的局部立体图。Fig. 4 (a) is a cross-sectional view of the relief valve device in the closed state corresponding to the IV-IV cross section of Fig. 3 , and (b) shows the relief valve device in the closed state with the description of the retainer omitted. The fixed scroll includes a partial perspective view with a partially cutaway section.

图5(a)是与图3的IV-IV剖面对应的开阀状态的溢流阀装置的剖视图，(b)是表示省略了保持器的记载的开阀状态的溢流阀装置的、在固定涡盘包含有局部剖切剖面的局部立体图。Fig. 5 (a) is a cross-sectional view of the relief valve device in the valve-open state corresponding to the IV-IV cross-section of Fig. 3 , and (b) shows the relief valve device in the valve-open state with the description of the retainer omitted. The fixed scroll includes a partial perspective view with a partially cutaway section.

图6是本发明的第二实施方式的密闭型电动压缩机的固定涡盘的俯视图。6 is a plan view of a fixed scroll of a hermetic electric compressor according to a second embodiment of the present invention.

图7(a)是与图6的VII-VII剖面对应的开阀状态的溢流阀装置的剖视图，(b)是表示开阀状态的溢流阀装置的、在固定涡盘包含有局部剖切剖面的局部立体图。Fig. 7 (a) is a cross-sectional view of the relief valve device in the valve-open state corresponding to the VII-VII cross-section of Fig. 6, and (b) is a partial cross-sectional view showing the relief valve device in the valve-open state, including a fixed scroll. Partial perspective view of cut section.

图8(a)是本发明的第三实施方式的密闭型电动压缩机的开阀状态的溢流阀装置的剖视图，(b)是表示开阀状态的溢流阀装置的、在固定涡盘包含有局部剖切剖面的局部立体图。8( a ) is a cross-sectional view of the relief valve device in the valve-open state of the hermetic electric compressor according to the third embodiment of the present invention, and (b) shows the relief valve device in the valve-open state in the fixed scroll. Contains partial perspective views with partially cutaway sections.

图9(a)是本发明的第四实施方式的密闭型电动压缩机的开阀状态的溢流阀装置的剖视图，(b)是表示开阀状态的溢流阀装置的、在固定涡盘包含有局部剖切剖面的局部立体图。9( a ) is a cross-sectional view of the relief valve device in the valve-open state of the hermetic electric compressor according to the fourth embodiment of the present invention, and (b) shows the relief valve device in the valve-open state in the fixed scroll. Contains partial perspective views with partially cutaway sections.

【符号说明】【Symbol Description】

1  密闭容器1 airtight container

2  压缩机构部2 Compression Mechanism Department

3  回旋涡盘3 orbiting scroll

4  固定涡盘4 fixed scroll

4e 喷出口4e ejection port

7  电动机部7 Motor Department

9  压缩室9 compression chamber

10 吸入室10 suction chamber

12 喷出压室12 Ejection pressure chamber

13 制冷机油13 Refrigeration oil

15 溢流阀装置15 overflow valve device

15a 溢流孔15a Overflow hole

15b 阀座15b Seat

15c 阀室15c valve chamber

15d 阀芯15d spool

15e 施力构件15e Force member

15g 制冷剂通路15g refrigerant passage

15j 大径部15j Large diameter part

15k 小径部15k Trail Department

16  保持器16 retainer

16c 主体部16c Main body

16d 延伸部16d extension

16e 凸部16e Convex

25  限动件25 stopper

25a 中央部25a central part

25b 突出部25b Protrusion

25c 凸部25c Convex

26  溢流流路26 Overflow flow path

40a 吸入口40a Suction port

40b 涡卷状气体通路40b Scroll gas passage

C   密闭型电动压缩机C Hermetic electric compressor

具体实施方式Detailed ways

接下来，适当参照附图，说明本发明的第一实施方式至第四实施方式。Next, first to fourth embodiments of the present invention will be described with appropriate reference to the drawings.

(第一实施方式)(first embodiment)

本实施方式的密闭型电动压缩机的主要特征在于，配置在将压缩室与喷出压室连通的溢流流路内的溢流阀装置的限动件具有：中央部；从该中央部朝向溢流流路的内壁呈放射状地突出的多个突出部。The main feature of the hermetic electric compressor of this embodiment is that the stopper of the relief valve device arranged in the relief flow passage connecting the compression chamber and the discharge pressure chamber has: a central portion; The inner wall of the overflow flow path has a plurality of protrusions that protrude radially.

在此，在说明了密闭型电动压缩机的整体结构之后，对溢流阀装置进行说明。Here, after describing the overall structure of the hermetic electric compressor, the relief valve device will be described.

<密闭型电动压缩机的整体结构><Overall Structure of Hermetic Electric Compressor>

图1是本发明的第一实施方式的密闭型电动压缩机的纵向剖视图。图2是表示图1的密闭型电动压缩机的回旋涡盘与固定涡盘啮合的情况的固定涡盘的背视图。Fig. 1 is a longitudinal sectional view of a hermetic electric compressor according to a first embodiment of the present invention. Fig. 2 is a rear view of the fixed scroll showing a meshing state of the orbiting scroll and the fixed scroll of the hermetic electric compressor shown in Fig. 1 .

如图1所示，密闭型电动压缩机C由高压腔室方式的密闭型涡盘压缩机构成，作为室内空调装置等的制冷循环的一部分使用，而在大范围的运转条件下使用。密闭型电动压缩机C具备：具有回旋涡盘3及固定涡盘4的压缩机构部2；驱动该压缩机构部2的电动机部7；收纳压缩机构部2及电动机部7的筒状纵长的密闭容器1。需要说明的是，压缩机构部2配置在密闭容器1内的上部，电动机部7配置在密闭容器1内的下部。并且，在密闭容器1内的底部积存有制冷机油13。As shown in FIG. 1 , the hermetic electric compressor C is composed of a high-pressure chamber type hermetic scroll compressor, and is used as part of a refrigeration cycle of a room air conditioner or the like, and is used under a wide range of operating conditions. The hermetically sealed electric compressor C is provided with: acompression mechanism part 2 having anorbiting scroll 3 and afixed scroll 4; a motor part 7 for driving thecompression mechanism part 2; Airtight container1. In addition, thecompression mechanism part 2 is arrange|positioned in the upper part in the airtight container 1, and the motor part 7 is arrange|positioned in the lower part in the airtight container 1. As shown in FIG. Further, refrigeratingmachine oil 13 is stored at the bottom of the airtight container 1 .

密闭容器1将上盖体1b和底盖体1c上下焊接于圆筒状的筒部1a而构成。在上盖体1b设有吸入管14。符号18是逆流防止阀。在筒部1a的侧面设有喷出管17。密闭容器1的内部成为喷出压室12。The airtight container 1 is configured by welding anupper cover body 1b and abottom cover body 1c to acylindrical tube portion 1a up and down. Thesuction pipe 14 is provided in theupper cover body 1b.Symbol 18 is a backflow prevention valve. Thedischarge pipe 17 is provided in the side surface of thecylindrical part 1a. The inside of the airtight container 1 serves as adischarge pressure chamber 12 .

吸入管14从密闭容器1的上表面部贯通密闭容器1而用于向压缩机构部2的吸入侧引导制冷剂气体。喷出管17以与密闭容器1内的喷出压室12连通的方式连接于侧面。Thesuction pipe 14 penetrates the airtight container 1 from the upper surface portion of the airtight container 1 and guides the refrigerant gas to the suction side of thecompression mechanism unit 2 . Thedischarge pipe 17 is connected to the side surface so as to communicate with thedischarge pressure chamber 12 in the airtight container 1 .

压缩机构部2具备：在台板4d上竖立设置有涡卷状的固定涡盘卷板4a的固定涡盘4；在台板3d上竖立设置有涡卷状的回旋涡盘卷板3a的回旋涡盘3；通过紧固构件等而与固定涡盘4一体化，并对回旋涡盘3进行支承的框架6。Thecompression mechanism unit 2 includes: afixed scroll 4 in which a spiral fixedscroll wrap 4a is erected on abase plate 4d; a spiral orbiting scroll wrap 3a erected on abaseplate 3d scroll 3 ; frame 6 that is integrated withfixed scroll 4 by fastening members and the like, and supports orbitingscroll 3 .

需要说明的是，图1中，符号9是形成在固定涡盘卷板4a与回旋涡盘卷板3a之间的在后面详细说明的制冷剂的压缩室，符号4e是将由压缩室9压缩后的制冷剂向喷出压室12喷出的喷出口。It should be noted that, in FIG. 1 ,symbol 9 is a compression chamber for a refrigerant described in detail later, which is formed between the fixed scroll wrap 4 a and the orbiting scroll wrap 3 a, andsymbol 4 e is the refrigerant compressed by thecompression chamber 9 . The refrigerant is discharged to the discharge port of thedischarge pressure chamber 12.

如图2所示，在固定涡盘4上形成有涡卷状气体通路40b，该涡卷状气体通路40b通过固定涡盘卷板4a而将吸入口40a与喷出口4e连结，该涡卷状气体通路40b经由喷出口4e而与喷出压室12(参照图1)相通。与该固定涡盘4对置而形成为大致圆盘状的所述的回旋涡盘3以回旋自如的方式配置。如上所述，在回旋涡盘3的上表面设置的回旋涡盘卷板3a以与固定涡盘卷板4a啮合的方式配置。As shown in FIG. 2, aspiral gas passage 40b is formed on the fixedscroll 4. Thespiral gas passage 40b connects thesuction port 40a and thedischarge port 4e through the fixedscroll wrap 4a. Thegas passage 40b communicates with the discharge pressure chamber 12 (see FIG. 1 ) via thedischarge port 4e. The above-mentionedorbiting scroll 3 formed in a substantially disk shape facing the fixedscroll 4 is arranged so as to be able to rotate freely. As described above, the orbiting scroll wrap 3 a provided on the upper surface of theorbiting scroll 3 is disposed so as to engage with the fixed scroll wrap 4 a.

符号10是吸入室，形成在从吸入口40a到回旋涡盘3为止的涡卷状气体通路40b上。Reference numeral 10 denotes a suction chamber formed in a scroll-shapedgas passage 40b extending from thesuction port 40a to theorbiting scroll 3 .

再次返回图1，固定涡盘4通过规定的紧固用具(螺栓等)而固定于框架6，框架6的外周侧通过焊接而固定在密闭容器1的内壁面。并且，在固定涡盘4设有在后面详细说明的溢流阀装置15。框架6具备将曲轴5支承为旋转自如的主轴承9a。在回旋涡盘3的下表面侧连结有曲轴5的偏心部5b。Returning to FIG. 1 again, the fixedscroll 4 is fixed to the frame 6 with predetermined fastening tools (bolts, etc.), and the outer peripheral side of the frame 6 is fixed to the inner wall surface of the airtight container 1 by welding. Furthermore, the fixedscroll 4 is provided with arelief valve device 15 which will be described in detail later. The frame 6 includes amain bearing 9 a that rotatably supports the crankshaft 5 . Theeccentric portion 5 b of the crankshaft 5 is connected to the lower surface side of theorbiting scroll 3 .

在回旋涡盘3的下表面侧与框架6之间配置有欧氏环8，欧氏环8安装到在回旋涡盘3的下表面侧形成的槽和在框架6上形成的槽内。而且，该欧氏环8起到接受曲轴5的偏心部5b的偏心旋转而使回旋涡盘3不自转地进行公转运动的作用。Oldham'sring 8 is disposed between the lower surface side of orbitingscroll 3 and frame 6 , and Oldham'sring 8 is fitted into a groove formed on the lower surface side of orbitingscroll 3 and a groove formed in frame 6 . And this Oldham'sring 8 plays the role which receives the eccentric rotation of theeccentric part 5b of the crankshaft 5, and makes theorbiting scroll 3 perform an orbital motion without autorotation.

电动机部7具备定子7a及转子7b。定子7a通过压入等而紧固于密闭容器1。转子7b以可旋转的方式配置在定子7a内。电动机部7经由固定于转子7b的曲轴5而使回旋涡盘3进行回旋运动。The motor unit 7 includes astator 7a and arotor 7b. Thestator 7a is fastened to the airtight container 1 by press fitting or the like. Therotor 7b is rotatably arranged inside thestator 7a. The motor unit 7 orbits theorbiting scroll 3 via the crankshaft 5 fixed to therotor 7b.

曲轴5具备主轴部5a和所述的偏心部5b，由设置于框架6的主轴承9a和下轴承21支承。偏心部5b偏心而一体地形成在曲轴5的主轴部5a，并与回旋涡盘3的背面设置的回旋轴承(未图示)嵌合。曲轴5由电动机部7进行驱动。偏心部5b相对于曲轴5的主轴部5a进行偏心旋转运动，从而驱动回旋涡盘3。而且，曲轴5中，向主轴承9a、下轴承21及回旋轴承(未图示)引导制冷机油13的供油通路5c设置在其内部，且在电动机部7侧的轴端安装有汲取制冷机油13而向供油通路5c引导的供油管5d。The crankshaft 5 includes amain shaft portion 5 a and the aforementionedeccentric portion 5 b, and is supported by amain bearing 9 a and alower bearing 21 provided on the frame 6 . Theeccentric portion 5 b is formed eccentrically and integrally with themain shaft portion 5 a of the crankshaft 5 , and is fitted to a revolving bearing (not shown) provided on the back surface of the revolvingscroll 3 . The crankshaft 5 is driven by a motor unit 7 . Theeccentric portion 5 b performs an eccentric rotational movement with respect to themain shaft portion 5 a of the crankshaft 5 to drive the orbitingscroll 3 . Furthermore, in the crankshaft 5, anoil supply passage 5c for guiding the refrigeratingmachine oil 13 to themain bearing 9a, thelower bearing 21, and the swing bearing (not shown) is provided inside, and a refrigerating machine oil pump is attached to the shaft end on the motor part 7 side. 13 and theoil supply pipe 5d leading to theoil supply passage 5c.

在回旋涡盘3的背面侧与框架6之间形成有成为吸入管14的压力与喷出压室12的压力的中间的压力的中间压室19。该中间压室19形成在将密闭容器1内的制冷机油13向压缩机构部2的滑动部供给的路径中途。而且，积存在密闭容器1的底部的制冷机油13由于该中间压室19与喷出压室12的压力差而经由在曲轴5的中心部形成的供油通路5c向主轴承9a等供给。Between the back side of theorbiting scroll 3 and the frame 6 is formed anintermediate pressure chamber 19 having a pressure intermediate between the pressure of thesuction pipe 14 and the pressure of thedischarge pressure chamber 12 . Theintermediate pressure chamber 19 is formed in the middle of a path for supplying the refrigeratingmachine oil 13 in the airtight container 1 to the sliding portion of thecompression mechanism portion 2 . The refrigeratingmachine oil 13 accumulated in the bottom of the airtight container 1 is supplied to themain bearing 9a and the like through theoil supply passage 5c formed in the center of the crankshaft 5 due to the pressure difference between theintermediate pressure chamber 19 and thedischarge pressure chamber 12 .

在这样的密闭型电动压缩机C中，通过使电动机部7的转子7b旋转，而经由曲轴5使回旋涡盘3进行回旋运动。由此，从吸入管14吸入的制冷剂经由逆流防止阀18及吸入口40a(参照图2)而被送入到涡卷状气体通路40b(参照图2)。在该涡卷状气体通路40b中，如图2所示，在固定涡盘卷板4a与回旋涡盘卷板3a之间形成有所述的压缩室9。In such a hermetic electric compressor C, theorbiting scroll 3 is caused to orbit via the crankshaft 5 by rotating therotor 7 b of the motor unit 7 . Thereby, the refrigerant sucked in from thesuction pipe 14 is sent into the scroll-shapedgas passage 40b (see FIG. 2 ) through thebackflow prevention valve 18 and thesuction port 40a (see FIG. 2 ). In this scroll-shapedgas passage 40b, as shown in FIG. 2, the above-mentionedcompression chamber 9 is formed between thefixed scroll wrap 4a and theorbiting scroll wrap 3a.

通过使回旋涡盘3不自转地相对于固定涡盘4进行公转运动，而从吸入口40a向图2所示的吸入室10吸入制冷剂。另一方面，图2所示的压缩室9伴随着该回旋涡盘卷板3a的公转运动而接近中央的喷出口4e。The refrigerant is sucked from thesuction port 40 a into thesuction chamber 10 shown in FIG. 2 by causing theorbiting scroll 3 to perform an orbital motion relative to the fixedscroll 4 without rotating. On the other hand, thecompression chamber 9 shown in FIG. 2 approaches thedischarge port 4e in the center along with the orbital movement of theorbiting scroll wrap 3a.

压缩室9越接近中央的喷出4e，压缩室9的容积越减少。即，压缩室9的制冷剂被压缩。然后，移动到面向中央的喷出4e的位置的压缩室9将压缩的制冷剂经由喷出4e向密闭容器1内的喷出压室12(参照图1)喷出。该喷出的制冷剂通过在框架6(参照图1)的外周设置的通路而被向下方引导，在将电动机部7(参照图1)冷却之后，从喷出管17(参照图1)被送入到密闭容器1(参照图1)的外部的制冷循环内。The closer thecompression chamber 9 is to thecentral discharge 4e, the smaller the volume of thecompression chamber 9 is. That is, the refrigerant in thecompression chamber 9 is compressed. Then, thecompression chamber 9 moved to a position facing thecentral discharge 4e discharges the compressed refrigerant to the discharge pressure chamber 12 (see FIG. 1 ) in the airtight container 1 through thedischarge 4e. The discharged refrigerant is guided downward through a passage provided on the outer periphery of the frame 6 (refer to FIG. 1 ), and after cooling the motor unit 7 (refer to FIG. 1 ), is discharged from the discharge pipe 17 (refer to FIG. 1 ). It is sent into the refrigeration cycle outside the airtight container 1 (refer to FIG. 1 ).

另一方面，图2所示的涡卷状气体通路40b的吸入室10在借助回旋涡盘卷板3a的公转运动而吸入了制冷剂之后，将制冷剂封入在固定涡盘卷板4a与回旋涡盘卷板3a之间而形成压缩室9。并且，被封入在压缩室9内的制冷剂如上述那样被压缩而由中央的喷出4e喷出。On the other hand, after thesuction chamber 10 of the scroll-shapedgas passage 40b shown in FIG. 2 sucks the refrigerant by the orbital motion of theorbiting scroll wrap 3a, the refrigerant is sealed between thefixed scroll wrap 4a and the return. Acompression chamber 9 is formed between the scroll wraps 3a. Then, the refrigerant sealed in thecompression chamber 9 is compressed as described above, and is discharged from thecentral discharge 4e.

需要说明的是，图2中，符号15a是溢流阀装置15(参照图1)的后述的溢流孔。In addition, in FIG. 2, the code|symbol 15a is the relief hole mentioned later of the relief valve apparatus 15 (refer FIG. 1).

<溢流阀装置><Relief valve device>

构成溢流阀装置15的后述的阀芯15d(参照图4(a)及(b))是一种止回阀，在压缩室9内的压力高于喷出压力的过压缩条件下开阀，起到将压缩室9内的制冷剂向喷出压室排出而抑制压缩室9的压力上升的作用。以下，说明使用了蝶形阀式的阀芯的溢流阀装置15。Thespool 15d (refer to FIG. 4(a) and (b)) described later constituting therelief valve device 15 is a check valve that opens under an overcompression condition in which the pressure in thecompression chamber 9 is higher than the discharge pressure. The valve functions to discharge the refrigerant in thecompression chamber 9 to the discharge pressure chamber to suppress pressure rise in thecompression chamber 9 . Hereinafter, therelief valve device 15 using a butterfly valve type spool will be described.

图3是图1的密闭型电动压缩机的固定涡盘的俯视图。Fig. 3 is a plan view of a fixed scroll of the hermetic electric compressor of Fig. 1 .

如图3所示，溢流阀装置15对应于在压缩机构部2(参照图1)上形成的多个压缩室9(参照图2)而配置在固定涡盘4的多个部位。这种溢流阀装置15在压缩室9的内的压力超过后述的设定压力时，用于将制冷剂从压缩室9向喷出压室12(参照图1)喷出。As shown in FIG. 3 , therelief valve devices 15 are arranged at a plurality of positions of the fixedscroll 4 corresponding to the plurality of compression chambers 9 (see FIG. 2 ) formed in the compression mechanism portion 2 (see FIG. 1 ). Such arelief valve device 15 is used to discharge the refrigerant from thecompression chamber 9 to the discharge pressure chamber 12 (see FIG. 1 ) when the pressure inside thecompression chamber 9 exceeds a set pressure described later.

需要说明的是，图3中，符号4e是喷出口，符号16是后述的保持器。In addition, in FIG. 3, the code|symbol 4e is a discharge port, and the code|symbol 16 is a retainer mentioned later.

接着参照的图4(a)是与图3的IV-IV剖面对应的闭阀状态的溢流阀装置的剖视图，图4(b)是表示省略了保持器的记载的闭阀状态的溢流阀装置的、在固定涡盘包含有局部剖切剖面的局部立体图。FIG. 4(a) to be referred to next is a cross-sectional view of a relief valve device in a valve-closed state corresponding to the IV-IV cross-section of FIG. 3 , and FIG. A partial perspective view of the valve device including a partially cutaway section in the fixed scroll.

如图4(a)及(b)所示，溢流阀装置15具备配置在溢流流路26内的阀芯15d、施力构件15e及限动件25、配置在固定涡盘4的上表面的保持器16。As shown in FIGS. 4( a ) and ( b ), therelief valve device 15 includes avalve element 15 d disposed in therelief passage 26 , a biasingmember 15 e and astopper 25 , and is disposed on the fixedscroll 4 .Surface holder 16.

溢流流路26以将涡卷状气体通路40b(参照图2)与喷出压室12(参照图1)连通的方式形成在固定涡盘4的台板4d上。该溢流流路26由溢流孔15a和阀室15c构成。Theoverflow channel 26 is formed on thebase plate 4d of the fixedscroll 4 so as to communicate thespiral gas passage 40b (see FIG. 2 ) with the discharge pressure chamber 12 (see FIG. 1 ). Theoverflow channel 26 is constituted by theoverflow hole 15a and thevalve chamber 15c.

溢流孔15a向涡卷状气体通路40b(参照图2)开口。溢流孔15a的容积成为在涡卷状气体通路40b上形成的压缩室9(参照图2)的容积的一部分，伴随着压缩行程中残留的气体的再膨胀损失而成为死区容积，因此优选极力减小溢流孔15a的容积(内径尺寸或长度尺寸)。Theoverflow hole 15a opens to thespiral gas passage 40b (see FIG. 2 ). The volume of theoverflow hole 15a becomes a part of the volume of the compression chamber 9 (see FIG. 2 ) formed in the scroll-shapedgas passage 40b, and becomes a dead volume accompanying the re-expansion loss of the gas remaining in the compression stroke, so it is preferable The volume (inner diameter dimension or length dimension) of theoverflow hole 15a is reduced as much as possible.

阀室15c包括：主要配置后述的限动件25的大径部(限动件插入部)15j；形成得比该大径部15j的直径小，且形成得比溢流孔15a的直径大，面向该溢流孔15a而与该溢流孔15a连通的小径部15k。Thevalve chamber 15c includes: a large-diameter portion (stopper insertion portion) 15j where astopper 25 described later is mainly arranged; the diameter of the large-diameter portion 15j is smaller than that of the large-diameter portion 15j, and the diameter of theoverflow hole 15a is formed larger. , facing theoverflow hole 15a and communicating with thesmall diameter portion 15k of theoverflow hole 15a.

需要说明的是，大径部15j与小径部15k经由锥形部15m而连通。In addition, the large-diameter part 15j and the small-diameter part 15k communicate via thetapered part 15m.

在该小径部的底部形成有阀座15b，该阀座15b由在溢流孔15a的周围呈环状地突起的台阶部构成。Avalve seat 15b is formed at the bottom of the small-diameter portion. Thevalve seat 15b is formed of a stepped portion protruding annularly around theoverflow hole 15a.

阀芯15d以闭塞溢流孔15a的方式配置于该阀座15b。该阀芯15d由圆盘状的弹簧钢板等形成。Thevalve element 15d is arranged on thevalve seat 15b so as to close theoverflow hole 15a. Thevalve element 15d is formed of a disc-shaped spring steel plate or the like.

限动件25具有大致圆柱状的中央部25a和从该中央部25a朝向溢流流路26的内壁即大径部15j的内壁呈放射状地突出的多个突出部25b(在本实施方式中，为沿着中央部25a的周面等间隔的3个)，在突出部25b彼此之间形成有制冷剂通路15g。Thestopper 25 has a substantially cylindricalcentral portion 25a and a plurality of protrudingportions 25b (in this embodiment, 15 g of coolant passages are formed between the protrudingparts 25 b at equal intervals along the peripheral surface of thecentral part 25 a.

突出部25b形成为沿着大致圆柱状的中央部25a的高度方向(溢流流路26的长度方向)细长延伸的大致长方体。The protrudingportion 25b is formed in a substantially rectangular parallelepiped elongated along the height direction of the substantially columnarcentral portion 25a (the longitudinal direction of the overflow flow path 26).

另外，在突出部25b与溢流流路26的内壁之间设有未图示的微小的间隙。In addition, a small gap (not shown) is provided between the protrudingportion 25 b and the inner wall of theoverflow channel 26 .

如图3所示，本实施方式中的保持器16是通过紧固构件20而安装在固定涡盘4的台板4d的上表面上的板体。在保持器16形成有使溢流阀装置15的制冷剂通路15g面向喷出压室12(参照图1)的开口16a、以及使固定涡盘4的喷出口4e面向喷出压室12(参照图1)的开口16b。As shown in FIG. 3 , theretainer 16 in this embodiment is a plate body attached to the upper surface of thebase plate 4 d of the fixedscroll 4 via the fastening member 20 . Theretainer 16 is formed with anopening 16a in which therefrigerant passage 15g of therelief valve device 15 faces the discharge pressure chamber 12 (see FIG. 1 ), and adischarge port 4e of the fixedscroll 4 faces the discharge pressure chamber 12 (see Figure 1)opening 16b.

如图4(a)所示，保持器16的开口16a的缘部与由施力构件15e向上方施力的阀室15c内的限动件25的上表面抵接。进一步详细而言，如图3及图4(a)所示，保持器16的开口16a的缘部仅与限动件25的上表面中的、突出部25b的上表面的外缘抵接。As shown in FIG. 4( a ), the edge of the opening 16 a of theretainer 16 abuts against the upper surface of thestopper 25 in thevalve chamber 15 c urged upward by the urgingmember 15 e. More specifically, as shown in FIG. 3 and FIG. 4( a ), the edge of the opening 16 a of theretainer 16 abuts only the outer edge of the upper surface of theprotrusion 25 b among the upper surfaces of thestopper 25 .

并且，保持器16通过与限动件25的上表面抵接，来限制限动件25在阀室15c内朝向上方移动的情况。由此，限动件25在阀室15c内被保持在规定的位置，安装在该限动件25上的施力构件15e以将阀芯15d按压在阀座15b上的按压力成为规定范围内的方式设定。Furthermore, theretainer 16 restricts the upward movement of thestopper 25 in thevalve chamber 15 c by abutting against the upper surface of thestopper 25 . Thus, thestopper 25 is held at a predetermined position in thevalve chamber 15c, and the pressing force of the biasingmember 15e attached to thestopper 25 to press thevalve element 15d against thevalve seat 15b falls within a predetermined range. way to set.

这种保持器16例如可以通过钢板的冲压成形加工来制造。Such aretainer 16 can be manufactured, for example, by press forming of a steel plate.

在这样的溢流阀装置15中，将本实施方式的密闭型电动压缩机C装入的制冷循环(例如室内空调装置等)的通常运转时，如图4(a)所示，阀芯15d以闭塞溢流孔15a的方式配置在阀座15b上，限动件25的施力构件15e以规定的作用力(按压力)将阀芯15d朝向阀座15b按压。即，在通常运转时，在图2所示的压缩室9中被压缩的制冷剂不经由通过阀芯15d(参照图4(a))密闭的溢流孔15a，而经由在固定涡盘4的中央形成的喷出口4e(参照图1)，向喷出压室12(参照图1)喷出。In such arelief valve device 15, during normal operation of a refrigeration cycle (such as a room air conditioner, etc.) in which the hermetic electric compressor C of this embodiment is incorporated, as shown in FIG. 4(a), thevalve body 15d The urgingmember 15e of thestopper 25 is arranged on thevalve seat 15b so as to close theoverflow hole 15a, and presses thevalve element 15d toward thevalve seat 15b with a predetermined force (pressing force). That is, during normal operation, the refrigerant compressed in thecompression chamber 9 shown in FIG. Thedischarge port 4e (refer to FIG. 1 ) formed in the center of the nozzle is used to discharge to the discharge pressure chamber 12 (refer to FIG. 1 ).

接着参照的图5(a)是与图3的IV-IV剖面对应的开阀状态的溢流阀装置的剖视图，图5(b)是表示省略了保持器的记载的开阀状态的溢流阀装置的、在固定涡盘包含有局部剖切剖面的局部立体图。FIG. 5(a) to be referred to next is a cross-sectional view of the relief valve device in the valve-open state corresponding to the IV-IV cross-section of FIG. 3 , and FIG. A partial perspective view of the valve device including a partially cutaway section in the fixed scroll.

压缩室9(参照图2)内的压力成为喷出压力以上，更详细而言，压缩室9内的压力大于设定压力(喷出压力+阀芯15d的重量+施力构件15e的弹性按压力)时，如图5(a)及(b)所示，闭塞溢流孔15a的阀芯15d克服施力构件15e的作用力(按压力)等而被向上方抬起。其结果是，压缩室9(参照图2)内的制冷剂如图5(a)的空心箭头所示，经由在溢流孔15a、限动件25的突出部25b彼此之间形成的制冷剂通路15g、及开口16a，向喷出压室12(参照图1)喷出。The pressure in the compression chamber 9 (refer to FIG. 2 ) becomes equal to or higher than the discharge pressure. pressure), as shown in Figure 5(a) and (b), thespool 15d blocking theoverflow hole 15a is lifted upward against the force (pressing force) of the biasingmember 15e. As a result, the refrigerant in the compression chamber 9 (see FIG. 2 ) passes through the refrigerant formed between theoverflow hole 15 a and the protrudingportion 25 b of thestopper 25 as shown by the hollow arrow in FIG. 5( a ). Thepassage 15g and theopening 16a discharge to the discharge pressure chamber 12 (see FIG. 1 ).

并且，制冷剂向喷出压室12喷出而压缩室9(参照图2)的压力小于所述的设定压力时，如图4(a)所示，施力构件15e复位，由此，阀芯15d再次闭塞溢流孔15a。And, when the refrigerant is discharged into thedischarge pressure chamber 12 and the pressure of the compression chamber 9 (see FIG. 2 ) is lower than the above-mentioned set pressure, as shown in FIG. Thespool 15d closes theoverflow hole 15a again.

接下来，说明本实施方式的密闭型电动压缩机C的作用效果。Next, the effects of the hermetic electric compressor C of the present embodiment will be described.

当制冷剂通过阀芯15d时的流路阻力大时，高压制冷剂残留在压缩室9内，压缩作功量增加，因此消耗多余的输入电力。因此，如上所述，在本实施方式的密闭型电动压缩机C中，保持器16不会妨碍在限动件25上设置的制冷剂通路15g中的流通，且充分地具有限制限动件25的移动范围的功能。因此，在本实施方式中，如上所述那样，如图5所示，形成从限动件25的中央部25a呈放射状地突出的多个突出部25b，在该突出部25b彼此之间设有制冷剂通路15g。When the flow path resistance of the refrigerant passing through thevalve element 15d is large, the high-pressure refrigerant remains in thecompression chamber 9, and the amount of compression work increases, thereby consuming excess input power. Therefore, as described above, in the hermetic electric compressor C of the present embodiment, theretainer 16 does not interfere with the flow in therefrigerant passage 15g provided on thestopper 25, and thestopper 25 is sufficiently limited. function of the range of motion. Therefore, in this embodiment, as mentioned above, as shown in FIG.Refrigerant passage 15g.

并且，将该限动件25隔开规定的间隙向阀室15c插入，并使限动件25的上表面的一部分与保持器16抵接，由此来限制限动件25的在阀室15c内的移动范围。Then, thestopper 25 is inserted into thevalve chamber 15c with a predetermined gap, and a part of the upper surface of thestopper 25 is brought into contact with theretainer 16, thereby restricting the position of thestopper 25 in thevalve chamber 15c. within the range of movement.

由此，根据本实施方式，在限动件25的外周的多个部位能够较大地确保制冷剂通路15g，因此在压缩室9(参照图1)内成为比喷出压力过大的压力时，能够高效率地使制冷剂向密闭容器1(参照图1)内的喷出压室12(参照图1)逃散。因此，根据本实施方式，可提供一种能够进一步减少过压缩损失且高性能、高可靠性的密闭型电动压缩机C(参照图1)。Thus, according to the present embodiment, since therefrigerant passage 15g can be largely ensured at a plurality of places on the outer periphery of thestopper 25, when the pressure in the compression chamber 9 (see FIG. 1 ) becomes too high compared to the discharge pressure, It is possible to efficiently escape the refrigerant into the discharge pressure chamber 12 (see FIG. 1 ) in the airtight container 1 (see FIG. 1 ). Therefore, according to the present embodiment, it is possible to provide a high-performance, high-reliability hermetic electric compressor C (see FIG. 1 ) capable of further reducing overcompression loss.

另外，根据本实施方式，由于限动件25具有突出部25b从中央部25a呈放射状地突出的简单的结构，因此能够利用烧结体来形成限动件25，所述限动件25的耐磨损性等机械特性优异且生产性及可靠性优异。In addition, according to the present embodiment, since thestopper 25 has a simple structure in which the protrudingportion 25b protrudes radially from thecentral portion 25a, thestopper 25 can be formed from a sintered body, and the wear resistance of thestopper 25 Excellent mechanical properties such as damage resistance, and excellent productivity and reliability.

(第二实施方式)(second embodiment)

接下来，说明本发明的第二实施方式。Next, a second embodiment of the present invention will be described.

该第二实施方式的密闭型电动压缩机C相对于所述第一实施方式的密闭型电动压缩机C仅在溢流阀装置15的结构上不同，其他的密闭型电动压缩机C的结构与第一实施方式共通，因此，这里仅说明溢流阀装置15。图6是本发明的第二实施方式的密闭型电动压缩机的固定涡盘的俯视图，是表示保持器的平面形状的图。图7(a)是与图6的VII-VII剖面对应的开阀状态的溢流阀装置的剖视图，图7(b)是表示开阀状态的溢流阀装置的、在固定涡盘包含有局部剖切剖面的局部立体图。The hermetic electric compressor C of the second embodiment differs from the hermetic electric compressor C of the first embodiment only in the structure of therelief valve device 15 , and the structure of the other hermetic electric compressors C is the same as that of the first embodiment. Since the first embodiment is common, only therelief valve device 15 will be described here. 6 is a plan view of a fixed scroll of a hermetic electric compressor according to a second embodiment of the present invention, showing a planar shape of a retainer. Fig. 7 (a) is the cross-sectional view of the overflow valve device in the valve-open state corresponding to the VII-VII cross-section of Fig. 6, and Fig. 7 (b) shows the relief valve device in the valve-open state, including the fixed scroll A partial perspective view of a partially cutaway section.

如上所述，第一实施方式中的保持器16的开口16a(参照图3及图4(a))的缘部通过仅与限动件25的上表面中的、突出部25b的上表面的外缘抵接，来限制限动件25朝向上方移动的情况。As described above, the edge of theopening 16a (see FIG. 3 and FIG. 4(a)) of theretainer 16 in the first embodiment passes only the upper surface of theprotrusion 25b among the upper surfaces of thestopper 25. The outer edge abuts to limit the situation that thestopper 25 moves upward.

相对于此，如图6、以及图7(a)及(b)所示，第二实施方式中的保持器16与限动件25的上表面中的、中央部25a的上表面抵接。On the other hand, as shown in FIG. 6 and FIGS. 7( a ) and ( b ), theretainer 16 in the second embodiment is in contact with the upper surface of thecentral portion 25 a of the upper surfaces of thestopper 25 .

更详细而言，如图6所示，保持器16具备主体部16c和从该主体部16c向外侧方向延伸的多个延伸部16d。More specifically, as shown in FIG. 6 , theretainer 16 includes amain body portion 16c and a plurality ofextension portions 16d extending outward from themain body portion 16c.

在本实施方式中的保持器16的主体部16c形成有使喷出口4e面向喷出压室12(参照图1)的开口16b。即，如上所述，由于喷出口4e形成在固定涡盘4的中央，因此保持器16的主体部16c配置在固定涡盘4的中央。In themain body part 16c of theholder 16 in this embodiment, theopening 16b which makes thedischarge port 4e face the discharge pressure chamber 12 (refer FIG. 1) is formed. That is, as described above, since thedischarge port 4 e is formed at the center of the fixedscroll 4 , themain body portion 16 c of theretainer 16 is arranged at the center of the fixedscroll 4 .

延伸部16d对应于溢流阀装置15的个数而形成，从主体部16c朝向各溢流阀装置15延伸。即，如上所述，溢流阀装置15沿着以喷出口4e为中心而呈涡卷状延伸的涡卷状气体通路40b(参照图2)配置，因此保持器16的延伸部16d从主体部16c呈放射状地延伸。Theextension part 16d is formed corresponding to the number ofrelief valve devices 15, and extends toward eachrelief valve device 15 from themain body part 16c. That is, as described above, therelief valve device 15 is disposed along thespiral gas passage 40b (see FIG. 2 ) extending spirally around thedischarge port 4e. 16c extends radially.

并且，如图7(a)及(b)所示，延伸部16d通过延伸部16d的前端而与限动件25的中央部25a的上表面抵接。And, as shown in FIGS. 7( a ) and ( b ), theextension portion 16 d abuts on the upper surface of thecentral portion 25 a of thestopper 25 through the front end of theextension portion 16 d.

而且，本实施方式中的延伸部16d的宽度(与延伸方向正交的方向的宽度)优选设定成与限动件25的中央部25a的直径大致相同。Furthermore, it is preferable to set the width (width in the direction perpendicular to the extending direction) of the extendingportion 16d in this embodiment to be substantially the same as the diameter of thecentral portion 25a of thestopper 25 .

如图7(a)及(b)所示，这种第二实施方式的溢流阀装置15由于通过延伸部16d的前端而与限动件25的中央部25a的上表面抵接，因此能够使制冷剂通路15g向喷出压室12(参照图1)侧较大地开口，该制冷剂通路15g在限动件25的中央部25a的外侧形成在突出部25b彼此之间。As shown in Fig. 7 (a) and (b), since therelief valve device 15 of the second embodiment is in contact with the upper surface of thecentral part 25a of thestopper 25 through the front end of theextension part 16d, it can Therefrigerant passage 15g is formed between theprotrusions 25b on the outside of thecentral portion 25a of thestopper 25 and is formed to open toward the discharge pressure chamber 12 (see FIG. 1 ) side.

即，在压缩室9(参照图2)内的压力成为设定压力以上而阀芯15d克服施力构件15e的作用力(按压力)等被向上方抬起时，如图7(a)的空心箭头所示流动的制冷剂从溢流孔15a经由较大地开口的制冷剂通路15g向喷出压室12(参照图1)喷出。因此，根据该溢流阀装置15，能够进一步减少密闭型电动压缩机C(参照图1)的过压缩损失。That is, when the pressure in the compression chamber 9 (refer to FIG. 2 ) becomes higher than the set pressure and thevalve element 15d is lifted upward against the urging force (pressing force) of the urgingmember 15e, etc., as shown in FIG. 7( a ), The refrigerant flowing as indicated by the hollow arrow is discharged from theoverflow hole 15a to the discharge pressure chamber 12 (see FIG. 1 ) through therefrigerant passage 15g which is widely opened. Therefore, according to thisrelief valve device 15 , the overcompression loss of the hermetic electric compressor C (see FIG. 1 ) can be further reduced.

另外，如图7(a)及(b)所示，该溢流阀装置15使延伸部16d的前端与限动件25的中央部25a的上表面抵接，与所述的第一实施方式的通过保持器16(参照图3)的开口16a的缘部与突出部25b的外缘抵接的情况相比，能够较大地取得保持器16相对于限动件25的接触面积。因此，根据该溢流阀装置15，能够减少对限动件25的接触面压，因此能够提供一种高性能且高可靠性的密闭型电动压缩机C(参照图1)。In addition, as shown in FIGS. 7( a ) and ( b ), therelief valve device 15 makes the front end of theextension portion 16 d contact the upper surface of thecentral portion 25 a of thestopper 25 , which is the same as that of the first embodiment described above. The contact area of theretainer 16 with respect to thestopper 25 can be obtained larger than when the edge of theopening 16a of the retainer 16 (see FIG. 3 ) abuts against the outer edge of the protrudingportion 25b. Therefore, according to therelief valve device 15 , the contact surface pressure on thestopper 25 can be reduced, so that a high-performance and highly reliable hermetic electric compressor C (see FIG. 1 ) can be provided.

(第三实施方式)(third embodiment)

接下来，说明本发明的第三实施方式。Next, a third embodiment of the present invention will be described.

该第三实施方式的密闭型电动压缩机C相对于所述第一实施方式的密闭型电动压缩机C仅在溢流阀装置15的结构上不同，其他的密闭型电动压缩机C的结构与第一实施方式共通，因此这里仅说明溢流阀装置15。The hermetic electric compressor C of the third embodiment differs from the hermetic electric compressor C of the first embodiment only in the structure of therelief valve device 15 , and the structure of the other hermetic electric compressors C is similar to that of the first embodiment. Since they are common to the first embodiment, only therelief valve device 15 will be described here.

图8(a)是本发明的第三实施方式的密闭型电动压缩机的开阀状态的溢流阀装置的剖视图，图8(b)是表示开阀状态的溢流阀装置的、在固定涡盘包含有局部剖切剖面的局部立体图。8( a ) is a cross-sectional view of the relief valve device in the valve-open state of the hermetic electric compressor according to the third embodiment of the present invention, and FIG. The scroll contains a partial perspective view of a partially cutaway section.

所述的第二实施方式中的溢流阀装置15(参照图7(a))的延伸部16d与突出部25b的上表面为相同高度，且与中央部25a的上表面抵接。Theextension part 16d of therelief valve device 15 in the second embodiment described above (see FIG. 7(a)) has the same height as the upper surface of theprotruding part 25b, and is in contact with the upper surface of thecentral part 25a.

相对于此，如图8(a)及(b)所示，第三实施方式中的溢流阀装置15在限动件25的中央部25a的上表面具有朝向上方突出的凸部25c。并且，保持器16的延伸部16d的前端与凸部25c的上表面抵接。On the other hand, as shown in FIGS. 8( a ) and ( b ), therelief valve device 15 in the third embodiment has aconvex portion 25 c protruding upward on the upper surface of thecenter portion 25 a of thestopper 25 . Furthermore, the tip of theextension portion 16d of theholder 16 is in contact with the upper surface of theconvex portion 25c.

如图8(a)及(b)所示，这样的第三实施方式中的溢流阀装置15在保持器16的延伸部16d的前端与限动件25的突出部25b的上表面之间，能够以与凸部25c的高度相同的间隔形成间隙。As shown in FIGS. 8( a ) and ( b ), therelief valve device 15 in such a third embodiment is located between the front end of theextension portion 16 d of theretainer 16 and the upper surface of theprotrusion 25 b of thestopper 25 . , gaps can be formed at the same interval as the height of theconvex portion 25c.

即，在压缩室9(参照图2)内的压力成为设定压力以上而阀芯15d克服施力构件15e的作用力(按压力)等被向上方抬起时，如图8(a)的空心箭头所示流动的制冷剂从溢流孔15a经由较大地开口的制冷剂通路15g向喷出压室12(参照图1)喷出。That is, when the pressure in the compression chamber 9 (refer to FIG. 2 ) becomes higher than the set pressure and thevalve element 15d is lifted upward against the biasing force (pressing force) of the biasingmember 15e, etc., as shown in FIG. 8( a ), The refrigerant flowing as indicated by the hollow arrow is discharged from theoverflow hole 15a to the discharge pressure chamber 12 (see FIG. 1 ) through therefrigerant passage 15g which is widely opened.

并且，由于在保持器16的延伸部16d的前端与限动件25的突出部25b的上表面之间形成有间隙，因此即使限动件25旋转而延伸部16d位于制冷剂通路15g的上方，制冷剂也能经由该间隙向喷出压室12(参照图1)喷出。Furthermore, since a gap is formed between the tip of theextension portion 16d of theretainer 16 and the upper surface of theprotrusion 25b of thestopper 25, even if thestopper 25 rotates and theextension portion 16d is located above therefrigerant passage 15g, The refrigerant can also be discharged to the discharge pressure chamber 12 (see FIG. 1 ) through the gap.

因此，根据该溢流阀装置15，提供一种能够与限动件25的旋转角度无关地稳定减少密闭型电动压缩机C(参照图1)的过压缩损失且高性能的密闭型电动压缩机C。Therefore, according to therelief valve device 15, a high-performance hermetic electric compressor capable of stably reducing the overcompression loss of the hermetic electric compressor C (see FIG. 1 ) regardless of the rotation angle of thestopper 25 is provided. c.

(第四实施方式)(fourth embodiment)

接下来，说明本发明的第四实施方式。Next, a fourth embodiment of the present invention will be described.

该第四实施方式的密闭型电动压缩机C相对于所述第一实施方式的密闭型电动压缩机C仅在溢流阀装置15的结构上不同，其他的密闭型电动压缩机C的结构与第一实施方式共通，因此这里仅说明溢流阀装置15。The hermetic electric compressor C of the fourth embodiment differs from the hermetic electric compressor C of the first embodiment only in the structure of therelief valve device 15 , and the structure of the other hermetic electric compressors C is the same as that of the first embodiment. Since they are common to the first embodiment, only therelief valve device 15 will be described here.

图9(a)是本发明的第四实施方式的密闭型电动压缩机的开阀状态的溢流阀装置的剖视图，图9(b)是表示开阀状态的溢流阀装置的、在固定涡盘包含有局部剖切剖面的局部立体图。Fig. 9(a) is a cross-sectional view of the relief valve device in the valve-open state of the hermetic electric compressor according to the fourth embodiment of the present invention, and Fig. 9(b) is a view showing the relief valve device in the valve-open state, fixed The scroll contains a partial perspective view of a partially cutaway section.

所述的第三实施方式中的溢流阀装置15(参照图7(a))的延伸部16d与限动件25的凸部25c的上表面抵接。Theextension portion 16 d of the relief valve device 15 (see FIG. 7( a )) in the third embodiment is in contact with the upper surface of theconvex portion 25 c of thestopper 25 .

相对于此，如图9(a)及(b)所示，第四实施方式中的溢流阀装置15在与限动件25的中央部25a的上表面对置的保持器16的延伸部16d具有朝向限动件25的中央部25a突出的凸部16e。并且，保持器16的延伸部16d的凸部16e与限动件25的中央部25a的上表面抵接。On the other hand, as shown in FIGS. 9( a ) and ( b ), in therelief valve device 15 in the fourth embodiment, the extension portion of theretainer 16 facing the upper surface of thecentral portion 25 a of thestopper 25 16 d has aconvex portion 16 e protruding toward thecentral portion 25 a of thestopper 25 . Furthermore, theconvex portion 16 e of theextension portion 16 d of theretainer 16 abuts on the upper surface of thecentral portion 25 a of thestopper 25 .

如图9(a)及(b)所示，这样的第四实施方式中的溢流阀装置15在限动件25的突出部25b的上表面与保持器16的延伸部16d之间，能够以与凸部16e的高度相同的间隔形成间隙。As shown in FIGS. 9( a ) and ( b ), in therelief valve device 15 of the fourth embodiment, between the upper surface of the protrudingportion 25 b of thestopper 25 and theextension portion 16 d of theretainer 16 , it is possible to Gaps are formed at the same intervals as the height of theprotrusions 16e.

即，在压缩室9(参照图2)内的压力成为设定压力以上而阀芯15d克服施力构件15e的作用力(按压力)等被向上方抬起时，如图9(a)的空心箭头所示流动的制冷剂从溢流孔15a经由较大地开口的制冷剂通路15g向喷出压室12(参照图1)喷出。That is, when the pressure in the compression chamber 9 (refer to FIG. 2 ) becomes higher than the set pressure and thevalve element 15d is lifted upward against the biasing force (pressing force) of the biasingmember 15e, etc., as shown in FIG. 9( a ), The refrigerant flowing as indicated by the hollow arrow is discharged from theoverflow hole 15a to the discharge pressure chamber 12 (see FIG. 1 ) through therefrigerant passage 15g which is widely opened.

并且，由于在保持器16的延伸部16d与限动件25的突出部25b的上表面之间形成有间隙，因此即使限动件25旋转而延伸部16d位于制冷剂通路15g的上方，制冷剂也能经由该间隙向喷出压室12(参照图1)喷出。Furthermore, since a gap is formed between theextension portion 16d of theretainer 16 and the upper surface of the protrudingportion 25b of thestopper 25, even if thestopper 25 rotates and theextension portion 16d is located above therefrigerant passage 15g, the refrigerant It is also possible to discharge to the discharge pressure chamber 12 (see FIG. 1 ) through this gap.

因此，根据该溢流阀装置15，提供一种能够与限动件25的旋转角度无关地稳定减少密闭型电动压缩机C(参照图1)的过压缩损失且高性能的密闭型电动压缩机C。Therefore, according to therelief valve device 15, a high-performance hermetic electric compressor capable of stably reducing the overcompression loss of the hermetic electric compressor C (see FIG. 1 ) regardless of the rotation angle of thestopper 25 is provided. c.

以上，说明了本发明的第一实施方式至第四实施方式，但本发明并未限定为这些实施方式，而能够以各种方式来实施。The first to fourth embodiments of the present invention have been described above, but the present invention is not limited to these embodiments, and can be implemented in various forms.

在所述实施方式中，成为在限动件25与阀芯15d之间配置施力构件15e的结构，但本发明也可以为如下结构：将限动件25(参照图5(a))在阀室15c(参照图5(a))内配置成能够沿着上下方向移动，在保持器16(参照图5(a))与限动件25之间配置施力构件15e(参照图5(a))，在限动件25的下端安装阀芯15d(参照图5(a))，而且限动件25自身成为阀芯，施力构件15e对限动件25朝向阀座15b(参照图5(a))施力。In the above-described embodiment, the biasingmember 15e is disposed between thestopper 25 and thevalve body 15d, but the present invention may also have a structure in which the stopper 25 (see FIG. Thevalve chamber 15c (refer to FIG. 5(a)) is arranged to be movable in the vertical direction, and the biasingmember 15e is arranged between the retainer 16 (refer to FIG. 5(a)) and the stopper 25 (refer to FIG. 5(a)). a)), avalve core 15d is installed at the lower end of the stopper 25 (refer to Fig. 5 (a)), and thestopper 25 itself becomes a valve core, and theforce member 15e faces thevalve seat 15b to the stopper 25 (refer to Fig. 5(a)) apply force.

另外，在所述实施方式中，在限动件25设置的突出部25b的个数成为3个，但本发明可以将突出部25b的个数形成为2个、或4个以上。In addition, in the above-described embodiment, the number ofprotrusions 25b provided on thestopper 25 is three, but in the present invention, the number ofprotrusions 25b may be two, or four or more.

另外，在所述实施方式中，将设置于限动件25的突出部25b在大致圆柱状的中央部25a的大致整个高度上设置，但本发明也可以将突出部25b的设置位置设定为中央部25a的上部、下部或中部、或这些位置的组合。In addition, in the above-described embodiment, the protrudingportion 25b provided on thestopper 25 is provided substantially over the entire height of the substantially columnarcentral portion 25a, but the present invention may set the protrudingportion 25b at The upper part, lower part or middle part of thecentral part 25a, or a combination of these positions.

Claims (4)

Translated fromChinese

1.一种密闭型电动压缩机，其特征在于，具备：1. A hermetic electric compressor, characterized in that it has:压缩机构部，其使回旋涡盘与固定涡盘啮合而形成压缩室，且对吸入到所述压缩室内的制冷剂进行压缩；a compression mechanism unit that engages the orbiting scroll and the fixed scroll to form a compression chamber, and compresses refrigerant sucked into the compression chamber;密闭容器，其收纳所述压缩机构部，且具有将由所述压缩室压缩过的制冷剂喷出的喷出压室；an airtight container housing the compression mechanism and having a discharge pressure chamber for discharging the refrigerant compressed by the compression chamber;溢流流路，其以使所述压缩室与所述喷出压室连通的方式形成于所述固定涡盘；an overflow flow path formed in the fixed scroll so that the compression chamber communicates with the discharge pressure chamber;溢流阀装置，其配置在所述溢流流路内，当所述压缩室的压力上升得高于设定压力时进行开路，以使所述压缩室与所述喷出压室连通，a relief valve device arranged in the relief flow path, and opens the circuit when the pressure of the compression chamber rises higher than a set pressure, so that the compression chamber communicates with the discharge pressure chamber,所述溢流阀装置具有：The overflow valve device has:阀芯，其以对所述溢流流路进行开闭的方式设置；a spool configured to open and close the overflow flow path;施力构件，其以使所述溢流流路成为闭状态的方式对所述阀芯施力；a urging member for urging the spool so as to close the overflow passage;限动件，其安装有所述施力构件；a stopper, which is installed with the force applying member;保持器，其将所述限动件保持在所述溢流流路内，a retainer retaining the stop within the overflow flow path,所述限动件具有从该限动件的中央部朝向所述溢流流路的内壁呈放射状地突出的多个突出部，在所述突出部彼此之间形成有制冷剂通路。The stopper has a plurality of protrusions radially protruding from a central portion of the stopper toward an inner wall of the overflow flow path, and a refrigerant passage is formed between the protrusions.2.根据权利要求1所述的密闭型电动压缩机，其特征在于，2. The hermetic electric compressor according to claim 1, wherein:所述保持器从所述喷出压室侧与所述限动件的所述中央部抵接而将所述限动件保持在所述溢流流路内。The retainer abuts against the central portion of the stopper from the side of the discharge pressure chamber to hold the stopper in the overflow flow path.3.根据权利要求2所述的密闭型电动压缩机，其特征在于，3. The hermetic electric compressor according to claim 2, wherein:在所述限动件的所述中央部设有与所述保持器抵接的凸部。A convex portion abutting against the retainer is provided at the central portion of the stopper.4.根据权利要求2所述的密闭型电动压缩机，其特征在于，4. The hermetic electric compressor according to claim 2, wherein:在所述保持器设有与所述限动件的所述中央部抵接的凸部。A convex portion abutting against the central portion of the stopper is provided on the retainer.

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