Sealed compressor

Abstract

In the compression part (12), the upper suction hole of the upper cylinder (121T) is connected to the upper compression part suction pipe (102T), and the lower suction hole of the lower cylinder (121S) is connected to the lower compression part suction pipe (102S). On the liquid storage shell (26) of the liquid storage container (25), the liquid storage suction pipe (27), the upper gas-liquid separation pipe (31T) and the lower gas-liquid separation pipe (31S) penetrate the side wall of the liquid storage shell (26) and are respectively welded and fixed to the first through hole (28a), the second through hole (28b) and the third through hole (28c) of the liquid storage shell (26); the upper gas-liquid separation pipe (31T) is connected to the upper compression part suction pipe (102T) via the upper connecting pipe (104T) outside the liquid storage shell (26); and the lower gas-liquid separation pipe (31S) is connected to the lower compression part suction pipe (102S) via the lower connecting pipe (104S) outside the liquid storage shell (26).

Description

Technical Field

[0001] The present invention relates to a sealed compressor. Background Art

[0002] Among sealed compressors, there is known a compressor in which a compression part and a motor for driving the compression part are housed inside a longitudinally cylindrical compressor main body container, and a liquid storage container is provided below the compressor main body container. The liquid storage container is used to separate the refrigerant into gas refrigerant and liquid refrigerant (hereinafter referred to as gas-liquid separation of the refrigerant) and allow the compression part to only inhale the gas refrigerant.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2020-109283

[0004] Patent Document 2: Japanese Patent Application Laid-Open No. 3-202682 Summary of the invention

[0005] The compressor of Patent Document 1 is a compressor having a rotary compression part, wherein a liquid storage container for gas-liquid separation of the refrigerant sucked into the compression part and a compressor main body container are constituted as separate containers, and the liquid storage container is arranged below the compressor main body container, and the compressor main body container and the liquid storage container are connected by means of a bracket. In the structure of Patent Document 1, since the compressor main body container and the liquid storage container are constituted as separate containers, there are problems of increased container cost and increased cost due to the need to use a bracket connecting the compressor main body container and the liquid storage container.

[0006] The compressor of Patent Document 2 is a scroll compressor, and the liquid storage container is directly connected to the lower part of the compressor main body container that accommodates the compression part and the motor that drives the compression part. Specifically, in the first embodiment of Patent Document 2, the compressor main body container is composed of a longitudinally placed cylindrical main shell, a cup-shaped upper shell that closes the upper end of the main shell, and a cup-shaped lower shell that closes the lower end of the main shell, and the liquid storage container is fixed by welding the opening side of the cup-shaped liquid storage shell to the lower side of the lower shell (hereinafter referred to as welding fixation), so that the space enclosed by the lower shell and the liquid storage shell is used as a liquid storage container. That is, the lower shell is used as both a part of the compressor main body container and a part of the liquid storage container. The lower shell is provided with a compression part suction pipe that passes through the lower shell, and the refrigerant inside the liquid storage container is sucked into the compression part via the gas-liquid separation pipe connected to the compression part suction pipe.

[0007] In the structure of Patent Document 2, the compression unit suction pipe that passes through the lower shell is welded and fixed to the lower shell inside the liquid storage container. For sealed compressors used in air conditioners, in order to check whether there is a welding defect in the shell constituting the sealed container, high-pressure gas is usually sealed inside before shipment to confirm whether there is gas leakage to the outside in the water tank.

[0008] In the case where there is a defect in the weld where the lower shell and the suction pipe of the compressor are welded and fixed in the first embodiment of Patent Document 2, the refrigerant gas may leak from the inside of the compressor main container to the inside of the liquid storage container. This welding defect cannot be detected by the above method, so there is a problem that when the compressor is running, the high-pressure refrigerant in the compressor main container leaks into the low-pressure liquid storage container, resulting in low efficiency or reduced reliability.

[0009] In addition, the compressor of Patent Document 2 has the following problem, that is, since the refrigerant inside the liquid storage container is directly sucked into the compression part through the gas-liquid separation tube connected to the suction pipe of the compression part, it is impossible to properly ensure the length of the suction channel, and thus the supercharging effect cannot be fully obtained. The supercharging effect refers to the phenomenon that as the volume of the hollow part (cylinder chamber) of the cylinder in the compression part changes, the pressure in the gas-liquid separation tube of the liquid storage container changes periodically, causing the natural vibration number of the gas-liquid separation tube to resonate with the frequency of the compression part, and the pressure change in the gas-liquid separation tube becomes significantly larger, so that additional refrigerant is squeezed into the cylinder chamber. That is, a technology as follows: in order to achieve resonance in the suction channel when the compressor is running at a preset speed, the pressure change in the suction channel is increased by adjusting the length of the suction channel, thereby improving the volumetric efficiency of the compressor.

[0010] The disclosed technology is proposed in view of the above-mentioned problems, and its purpose is to provide a compressor with high reliability and high performance. In the structure of the compressor, a liquid storage container is arranged below the compressor main container. The manufacturing cost of the compressor can be suppressed, and at the same time, the refrigerant leakage from the compressor main container to the inside of the liquid storage container can be prevented, thereby realizing the improvement of volumetric efficiency based on the boosting effect.

[0011] In one embodiment of the sealed compressor disclosed in the present application, the interior of the longitudinally arranged cylindrical compressor main body container contains: a compression part, which sucks in refrigerant and discharges the compressed refrigerant into the compressor main body container; and an electric motor, which is used to drive the compression part. A liquid storage container is provided below the compressor main body container, which is used to separate the refrigerant sucked from the refrigeration cycle into gas and liquid and supply the gas refrigerant to the compression part. In the sealed compressor, the compression part has an upper cylinder and a lower cylinder, the upper suction hole of the upper cylinder is connected to the upper compression part suction pipe, the lower suction hole of the lower cylinder is connected to the lower compression part suction pipe, and the liquid storage container The device has a cup-shaped liquid reservoir shell, the open side of the liquid reservoir shell is welded and fixed to the compressor main body container, on the liquid reservoir shell, the liquid reservoir suction pipe that sucks the refrigerant from the refrigeration cycle into the liquid reservoir container, and the upper gas-liquid separation pipe and the lower gas-liquid separation pipe that transport the gas refrigerant from the inside of the liquid reservoir container pass through the liquid reservoir shell and are respectively welded and fixed to the first through hole, the second through hole and the third through hole of the liquid reservoir shell, the upper gas-liquid separation pipe is outside the liquid reservoir shell, and is connected to the upper compression part suction pipe via the upper connecting pipe, and the lower gas-liquid separation pipe is outside the liquid reservoir shell, and is connected to the lower compression part suction pipe via the lower connecting pipe.

[0012] According to one embodiment of the sealed compressor disclosed in the present application, in a structure in which a liquid storage container is arranged below the compressor main body container, the welding parts of the upper gas-liquid separation tube, the upper connecting tube, and the upper compression part suction pipe, as well as the welding parts of the lower gas-liquid separation tube, the lower connecting tube, and the lower compression part suction pipe are arranged outside the liquid storage container. Thus, the manufacturing cost of the compressor can be suppressed, and poor welding can be easily detected to achieve an improvement in volumetric efficiency based on the boosting effect, thereby providing a compressor with high reliability and high performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a longitudinal sectional view showing the rotary compressor of the embodiment.

[0014] Figure 2 It is an exploded perspective view showing the compression part of the rotary compressor according to the embodiment.

[0015] Figure 3 It is a top view showing the rotary compressor of the embodiment.

[0016] Figure 4 It is a perspective view showing the main part of the rotary compressor according to the embodiment.

[0017] Figure 5 It is a side view showing an enlarged view of a main part of the rotary compressor of the embodiment.

[0018] Figure 6 It is a perspective view showing the interior of the liquid storage container of the embodiment.

[0019] Figure 7 It is a longitudinal sectional view showing the main part of the rotary compressor of the embodiment. DETAILED DESCRIPTION

[0020] Hereinafter, the embodiments of the sealed compressor disclosed in the present application will be described in detail with reference to the accompanying drawings. In addition, the sealed compressor disclosed in the present application is not limited to the following embodiments.

[0021] Example

[0022] The structure of a rotary compressor

[0023] In the present embodiment, a rotary compressor will be described as an example of a sealed compressor. Figure 1 It is a longitudinal sectional view showing the rotary compressor of the embodiment. Figure 2 It is an exploded perspective view showing the compression part of the rotary compressor according to the embodiment. Figure 3 It is a top view showing the rotary compressor of the embodiment. Figure 4 It is a perspective view showing the main part of the rotary compressor according to the embodiment.

[0024] like Figure 1 As shown, the interior of the compressor main container 10 of the rotary compressor 1 accommodates a compression part 12 and a motor 11. The compression part 12 sucks refrigerant from the upper compression part suction pipe 102T and the lower compression part suction pipe 102S and discharges the compressed refrigerant to the interior of the compressor main container 10. The motor 11 is used to drive the compression part 12. The rotary compressor 1 is an internal high-pressure sealed compressor that discharges the high-pressure refrigerant compressed by the compression part 12 to the interior of the compressor main container 10 and then discharges it to the refrigeration cycle through the discharge pipe 107.

[0025] like Figure 1 , Figure 3 and Figure 4 As shown, the compressor main body container 10 has: a main shell 10a in a longitudinal cylindrical shape, a cup-shaped upper shell 10b, and a cup-shaped lower shell 10c. The compressor main body container 10 is formed by welding and fixing the opening side 10g of the upper shell 10b to the upper end of the main shell 10a, and welding and fixing the opening side 10d of the lower shell to the lower end of the main shell 10a.

[0026] The upper compression part suction pipe 102T and the lower compression part suction pipe 102S for sucking the low-pressure refrigerant of the refrigeration cycle into the compression part 12 are arranged in a manner that penetrates the main shell 10a. Specifically, the upper conduit 101T is brazed and fixed on the main shell 10a, and the upper compression part suction pipe 102T is inserted into the inner side of the upper conduit 101T and brazed and fixed to the upper conduit 101T. Similarly, the lower conduit 101S is brazed and fixed on the main shell 10a, and the lower compression part suction pipe 102S is inserted into the inner side of the lower conduit 101S and brazed and fixed to the lower conduit 101S.

[0027] A discharge pipe 107 for discharging the high-pressure refrigerant compressed by the compression unit 12 from the interior of the compressor body container 10 to the refrigeration cycle is provided so as to penetrate the upper shell 10b. The discharge pipe 107 is directly welded and fixed to the upper shell 10b.

[0028] Figure 5 It is a side view showing an enlarged view of a main part of the rotary compressor 1 according to the embodiment. Figure 6 It is a perspective view showing the interior of the liquid storage container 25 according to the embodiment. Figure 7 2 is a longitudinal sectional view showing the main part of the rotary compressor of the embodiment. Figure 1 , Figure 7 In the figure, for easy identification, the position of the accumulator suction pipe 27 described later is shifted in the circumferential direction of the accumulator housing 26, but the position of the accumulator suction pipe 27 is not limited.

[0029] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, a liquid storage container 25 is provided below the compressor main body container 10, and the liquid storage container 25 is used to separate the gas and liquid of the low-pressure refrigerant sucked from the refrigeration cycle, and to make the compression part 12 suck only the gas refrigerant. The liquid storage container 25 has a cup-shaped liquid storage shell 26, and the opening side 26a of the liquid storage shell 26 is welded and fixed to the lower shell 10c of the compressor main body container 10. Therefore, the lower shell 10c of the compressor main body container 10 is also used as a cover for closing the opening side 26a of the liquid storage shell 26.

[0030] On the liquid storage shell 26, the liquid storage shell suction pipe 27 that sucks the refrigerant from the refrigeration cycle into the liquid storage container 25, and the upper gas-liquid separation tube 31T and the lower gas-liquid separation tube 31S that send the gas refrigerant from the interior of the liquid storage container 25 pass through the side wall of the liquid storage shell 26 and are welded and fixed to the first through hole 28a, the second through hole 28b and the third through hole 28c of the liquid storage shell 26, respectively.

[0031] The upper gas-liquid separation pipe 31T is connected to the upper compressor suction pipe 102T via the upper connecting pipe 104T outside the liquid storage container 25. The lower gas-liquid separation pipe 31S is connected to the lower compressor suction pipe 102S via the lower connecting pipe 104S outside the liquid storage container 25.

[0032] like Figure 1 As shown, a base member 310 for supporting the entire rotary compressor 1 is welded and fixed to the lower portion of the accumulator housing 26, that is, to the anti-opening side 26b opposite to the opening side 26a.

[0033] like Figure 1 and Figure 2 As shown, the compression part 12 includes: an upper cylinder 121T, a lower cylinder 121S, a middle partition 140, an upper end plate 160T, a lower end plate 160S, and a rotating shaft 15, and the upper end plate 160T, the upper cylinder 121T, the middle partition 140, the lower cylinder 121S, and the lower end plate 160S are stacked in this order and fixed by a plurality of bolts 175 and auxiliary bolts 176. The upper end plate 160T is provided with a main bearing portion 161T. The lower end plate 160S is provided with a secondary bearing portion 161S. The rotating shaft 15 is provided with a main shaft portion 153, an upper eccentric portion 152T, a lower eccentric portion 152S, and a secondary shaft portion 151. The main shaft portion 153 of the rotating shaft 15 is fitted in the main bearing portion 161T of the upper end plate 160T, and the secondary shaft portion 151 of the rotating shaft 15 is fitted in the secondary bearing portion 161S of the lower end plate 160S, whereby the rotating shaft 15 is rotatably supported.

[0034] The motor 11 includes a stator 111 disposed on the outside and a rotor 112 disposed on the inside. The stator 111 is fixed to the inner peripheral surface of the main housing 10 a by shrink fitting. The rotor 112 is fixed to the rotating shaft 15 by shrink fitting.

[0035] In order to lubricate the sliding parts of the compression part 12 and the high-pressure part and the low-pressure part in the sealed compression chamber, a lubricating oil 18 in an amount nearly enough to penetrate the compression part 12 is sealed in the compressor body container 10 .

[0036] Next, use Figure 2 The compression section 12 is described in detail. A cylindrical upper hollow portion 130T is provided inside the upper cylinder 121T, and an upper piston 125T is arranged in the upper hollow portion 130T. The upper piston 125T is fitted in the upper eccentric portion 152T of the rotating shaft 15. A cylindrical lower hollow portion 130S is provided inside the lower cylinder 121S, and a lower piston 125S is arranged in the lower hollow portion 130S. The lower piston 125S is fitted in the lower eccentric portion 152S of the rotating shaft 15.

[0037] The upper cylinder 121T is provided with a groove extending from the upper hollow portion 130T to the outer circumference, and an upper vane 127T is arranged in the groove. The upper cylinder 121T is provided with an upper spring hole 124T leading from the outer circumference to the groove, and an upper spring 126T is arranged in the upper spring hole 124T. The lower cylinder 121S is provided with a groove extending from the lower hollow portion 130S to the outer circumference, and a lower vane 127S is arranged in the groove. The lower cylinder 121S is provided with a lower spring hole 124S leading from the outer circumference to the groove, and a lower spring 126S is arranged in the lower spring hole 124S.

[0038] One end of the upper vane 127T is pushed against the upper piston 125T by the upper spring 126T, thereby, in the upper hollow portion 130T of the upper cylinder 121T, the space outside the upper piston 125T is divided into an upper suction chamber 131T and an upper discharge chamber 133T. The upper cylinder 121T is provided with an upper suction hole 135T connected to the upper suction chamber 131T from the periphery. The upper suction hole 135T is connected to the upper compression unit suction pipe 102T. One end of the lower vane 127S is pushed against the lower piston 125S by the lower spring 126S, thereby, in the lower hollow portion 130S of the lower cylinder 121S, the space outside the lower piston 125S is divided into a lower suction chamber 131S and a lower discharge chamber 133S. The lower cylinder 121S is provided with a lower suction hole 135S connected to the lower suction chamber 131S from the periphery. The lower suction hole 135S is connected to the lower compression part suction pipe 102S.

[0039] The upper end plate 160T is provided with an upper discharge hole 190T which penetrates the upper end plate 160T and communicates with the upper discharge chamber 133T. An upper discharge valve 200T for opening or closing the upper discharge hole 190T and an upper discharge valve pressing plate 201T for limiting the warping of the upper discharge valve 200T are fixed to the upper end plate 160T by upper rivets 202T. An upper end plate cover 170T for covering the upper discharge hole 190T is arranged on the upper side of the upper end plate 160T, so that a closed upper end plate cover chamber 180T is formed by the upper end plate 160T and the upper end plate cover 170T. The upper end plate cover 170T is fixed to the upper end plate 160T by a plurality of bolts 175 which fix the upper end plate 160T and the upper cylinder 121T. The upper end plate cover 170T is provided with an upper end plate cover discharge hole 172 that allows the upper end plate cover chamber 180T to communicate with the interior of the compressor main body container 10 .

[0040] The lower end plate 160S is provided with a lower discharge hole 190S which penetrates the lower end plate 160S and communicates with the lower discharge chamber 133S. A lower discharge valve 200S for opening or closing the lower discharge hole 190S and a lower discharge valve pressing plate 201S for limiting the warping of the lower discharge valve 200S are fixed to the lower end plate 160S by lower rivets 202S. A lower end plate cover 170S for covering the lower discharge hole 190S is disposed on the lower side of the lower end plate 160S, so that a closed lower end plate cover chamber 180S is formed by the lower end plate 160S and the lower end plate cover 170S (see Figure 1 ). The lower end plate cover 170S is fixed to the lower end plate 160S by a plurality of bolts 175 that fix the lower end plate 160S and the lower cylinder 121S.

[0041] In addition, the compression unit 12 is provided with a refrigerant communication hole 136 (see FIG. 1 ) that penetrates the lower end plate 160S, the lower cylinder 121S, the middle partition plate 140, the upper end plate 160T, and the upper cylinder 121T and connects the lower end plate cover chamber 180S and the upper end plate cover chamber 180T. Figure 2 ).

[0042] Next, the flow of refrigerant generated by the rotation of the rotating shaft 15 will be described. The upper piston 125T and the lower piston 125S engaged with the upper eccentric portion 152T and the lower eccentric portion 152S of the rotating shaft 15 perform a revolving motion based on the rotation of the rotating shaft 15, thereby the upper suction chamber 131T and the lower suction chamber 131S absorb refrigerant while expanding their volumes. As a refrigerant suction passage, the low-pressure refrigerant of the refrigeration cycle is sucked into the liquid storage container 25 via the liquid storage suction pipe 27. When the refrigerant sucked into the liquid storage container 25 is mixed with liquid, the liquid is retained in the lower part of the liquid storage container 25, and only the gas refrigerant is sucked into the upper gas-liquid separation pipe 31T and the lower gas-liquid separation pipe 31S which are opened at the top inside the liquid storage container 25. The gas refrigerant sucked into the upper gas-liquid separation pipe 31T flows through the upper connecting pipe 104T and the upper compression part suction pipe 102T, and is sucked into the upper suction chamber 131T. Similarly, the gas refrigerant sucked into the lower gas-liquid separation pipe 31S flows through the lower connecting pipe 104S and the lower compression section suction pipe 102S, and is sucked into the lower suction chamber 131S.

[0043] In the case where the amount of liquid refrigerant in the refrigerant sucked from the refrigeration cycle is large, the following situation may occur, that is, the liquid level of the liquid refrigerant inside the liquid storage container 25 rises above the openings of the other side ends 31Tb and 31Sb of the upper gas-liquid separation tube 31T and the lower gas-liquid separation tube 31S, causing a large amount of liquid refrigerant to flow into the upper gas-liquid separation tube 31T and the lower gas-liquid separation tube 31S. If a large amount of liquid refrigerant flows into the compression part 12 through the upper gas-liquid separation tube 31T and the lower gas-liquid separation tube 31S, it will cause damage to the compression part 12. In order to prevent a large amount of liquid refrigerant from flowing into the upper gas-liquid separation tube 31T and the lower gas-liquid separation tube 31S, the upper gas-liquid separation tube 31T and the lower gas-liquid separation tube 31S are provided with a liquid return hole 34 for keeping the gas-liquid separation tube 31 sucking a small amount of liquid refrigerant.

[0044] Next, the flow of the discharged refrigerant generated by the rotation of the rotating shaft 15 will be described. Based on the rotation of the rotating shaft 15, the upper piston 125T fitted in the upper eccentric portion 152T of the rotating shaft 15 performs an orbital motion, thereby compressing the refrigerant while reducing the volume of the upper discharge chamber 133T. When the pressure of the compressed refrigerant is higher than the pressure of the upper end plate cover chamber 180T outside the upper discharge valve 200T, the upper discharge valve 200T opens, and the refrigerant is discharged from the upper discharge chamber 133T to the upper end plate cover chamber 180T. The refrigerant discharged to the upper end plate cover chamber 180T is discharged from the upper end plate cover discharge hole 172 provided in the upper end plate cover 170T into the compressor main body container 10.

[0045] In addition, based on the rotation of the rotating shaft 15, the lower piston 125S fitted in the lower eccentric portion 152S of the rotating shaft 15 performs an orbital motion, thereby compressing the refrigerant while reducing the volume of the lower discharge chamber 133S. When the pressure of the compressed refrigerant is higher than the pressure of the lower end plate cover chamber 180S outside the lower discharge valve 200S, the lower discharge valve 200S opens, and the refrigerant is discharged from the lower discharge chamber 133S to the lower end plate cover chamber 180S. The refrigerant discharged to the lower end plate cover chamber 180S flows through the refrigerant communication hole 136 and the upper end plate cover chamber 180T, and is discharged from the upper end plate cover discharge hole 172 provided in the upper end plate cover 170T into the compressor main body container 10.

[0046] The refrigerant discharged into the compressor main body container 10 passes through the notches (not shown) provided on the outer periphery of the stator 111 and communicating with each other, or the gaps (not shown) of the winding portion of the stator 111, or the gaps 115 (see FIG. 115 ) between the stator 111 and the rotor 112. Figure 1 ) is guided to the top of the motor 11 and discharged from the discharge pipe 107 arranged at the upper part of the compressor main body container 10.

[0047] Next, the flow of the lubricating oil 18 will be described. The lubricating oil 18 sealed in the lower part of the compressor main container 10 flows through the interior of the rotating shaft (not shown) based on the centrifugal force of the rotating shaft and is supplied to the compression part 12. The lubricating oil 18 supplied to the compression part 12 is mixed with the refrigerant and becomes mist, and is discharged into the interior of the compressor main container 10 together with the refrigerant. The lubricating oil 18 that has become mist and is discharged into the interior of the compressor main container 10 is separated from the refrigerant by the centrifugal force caused by the rotational force of the motor 11, and returns to the lower part of the compressor main container 10 as oil droplets. However, part of the lubricating oil 18 is not separated and is discharged into the refrigeration cycle together with the refrigerant. The lubricating oil 18 discharged into the refrigeration cycle returns to the liquid storage container 25 after circulating through the refrigeration cycle, and is separated inside the liquid storage container 25 and retained in the lower part of the liquid storage container 25. The lubricating oil 18 retained in the lower portion of the liquid storage container 25 flows little by little into the upper gas-liquid separation pipe 31T and the lower gas-liquid separation pipe 31S through the return hole 34 together with the liquid refrigerant, and is sucked into the upper suction chamber 131T and the lower suction chamber 131S together with the suction refrigerant.

[0048] Characteristic structure of rotary compressor

[0049] Next, the characteristic structure of the rotary compressor 1 of the embodiment is described. The characteristics of the embodiment include the structure of the liquid storage container 25 directly connected to the lower shell 10c of the compressor body container 10, and the connection structure of the upper connecting pipe 104T and the lower connecting pipe 104S.

[0050] First, in this embodiment, the lower shell 10c of the compressor main body container 10 is embedded in the inner side of the accumulator shell 26, and the opening side 26a of the accumulator shell 26 is joined to the entire circumference of the peripheral wall of the lower shell 10c by welding (see Figure 1 ). The liquid storage container 25 is sealed by the inner peripheral surface of the liquid storage shell 26 being in contact with the outer peripheral surface of the lower shell 10c of the compressor main container 10, and a welding portion is formed on the outer peripheral surface of the liquid storage shell 26. As a result, the welding portion between the liquid storage shell 26 and the compressor main container 10 faces the outside of the rotary compressor 1, so that gas leakage can be easily confirmed from the welding portion. Therefore, the operation of checking the sealing of the liquid storage shell 26 can be easily performed, so that the reliability of the sealing state can be easily ensured.

[0051] In addition, if Figure 5 , Figure 6 and Figure 7 As shown, the accumulator housing 26 is connected to the upper hollow portion 130T (see FIG. 1 ) of the upper cylinder 121T via the upper connecting pipe 104T connected to the upper gas-liquid separation pipe 31T and the upper compression unit suction pipe 102T. Figure 2) is connected. In addition, the accumulator housing 26 is connected to the lower hollow portion 130S (see Figure 2 )connect.

[0052] One end 31Ta of the upper gas-liquid separation tube 31T is connected to the upper connecting tube 104T, and the other end 31Tb penetrates the side wall of the reservoir shell 26, extends toward the inside of the reservoir shell 26, and bends upward toward the inside. In addition, one end 31Ta of the upper gas-liquid separation tube 31T penetrates the side wall of the reservoir shell 26 and is welded and fixed to the second through hole 28b of the reservoir shell 26. Similarly, one end 31Sa of the lower gas-liquid separation tube 31S is connected to the lower connecting tube 104S, and the other end 31Sb penetrates the side wall of the reservoir shell 26, extends toward the inside of the reservoir shell 26, and bends upward toward the inside. In addition, one end 31Sa of the lower gas-liquid separation tube 31S penetrates the side wall of the reservoir shell 26 and is welded and fixed to the third through hole 28c of the reservoir shell 26.

[0053] One side end 31Ta of the upper gas-liquid separation tube 31T and one side end 31Sa of the lower gas-liquid separation tube 31S are arranged side by side and adjacent to each other in the circumferential direction of the outer peripheral surface of the accumulator housing 26. The upper gas-liquid separation tube 31T and the lower gas-liquid separation tube 31S extend in parallel with each other at a distance inside the accumulator housing 26. In addition, the other side end 31Tb of the upper gas-liquid separation tube 31T and the other side end 31Sb of the lower gas-liquid separation tube 31S extend to a position above the position of the one side end 27a of the accumulator suction pipe 27.

[0054] One end portion 27a of the accumulator suction pipe 27 passes through the side wall of the accumulator case 26 and extends toward the inside of the accumulator case 26. In addition, the one end portion 27a passing through the side wall of the accumulator case 26 is welded and fixed to the first through hole 28a of the accumulator case 26. The other end portion 27b of the accumulator suction pipe 27 extends toward the upper side of the accumulator case 26 and is connected to a pipe (not shown) on the low pressure side in the refrigeration cycle.

[0055] In an embodiment, Figure 5 and Figure 6As shown, on the reservoir housing 26, the first through hole 28a through which the reservoir suction pipe 27 passes through the reservoir housing 26, the second through hole 28b through which the upper gas-liquid separation pipe 31T passes through the reservoir housing 26, and the third through hole 28c through which the lower gas-liquid separation pipe 31S passes through the reservoir housing 26 are arranged adjacent to each other in the circumferential direction of the reservoir housing 26. For example, the first through hole 28a of the reservoir suction pipe 27 is arranged to be adjacent to the third through hole 28c of the lower gas-liquid separation pipe 31S in the circumferential direction of the reservoir housing 26. In addition, the first through hole 28a of the reservoir suction pipe 27 may also be arranged to be adjacent to the second through hole 28b of the upper gas-liquid separation pipe 31T in the circumferential direction of the reservoir housing 26.

[0056] Therefore, if Figure 3 As shown, by centrally arranging the accumulator suction pipe 27, the upper gas-liquid separation pipe 31T and the lower gas-liquid separation pipe 31S at one point in the circumferential direction of the accumulator housing 26, the accumulator suction pipe 27, the upper connecting pipe 104T and the lower connecting pipe 104S can be centrally arranged in the circumferential direction of the accumulator housing 26, so that the rotary compressor 1 is formed compactly as a whole. Figure 1 , Figure 7 In order to facilitate identification, the position of the liquid reservoir suction pipe 27 in the circumferential direction of the liquid reservoir housing 26 is staggered. However, as described above, the liquid reservoir suction pipe 27 is Figure 4 and Figure 5 As shown, it is arranged at a position adjacent to the lower connecting pipe 104S. In addition, the liquid storage device suction pipe 27 is not limited to Figure 4 and Figure 5 The position shown can also be Figure 1 , Figure 7 As shown, it is arranged on the side opposite to the side where the upper connecting pipe 104T and the lower connecting pipe 104S are located in the circumferential direction of the reservoir case 26 .

[0057] like Figure 4 and Figure 5 As shown, the upper connecting pipe 104T has a lower end 104Ta connected to one end 31Ta of the upper gas-liquid separation pipe 31T, and an upper end 104Tb connected to the upper compression part suction pipe 102T, and the upper connecting pipe 104T is arranged along the outer peripheral surface of the accumulator shell 26 and the outer peripheral surface of the compressor main body container 10. Similarly, the lower connecting pipe 104S has a lower end 104Sa connected to one end 31Sa of the lower gas-liquid separation pipe 31S, and an upper end 104Sb connected to the lower compression part suction pipe 102S, and the lower connecting pipe 104S is arranged along the outer peripheral surface of the accumulator shell 26 and the outer peripheral surface of the compressor main body container 10.

[0058] like Figure 5 and Figure 6As shown, the second through hole 28b through which the upper gas-liquid separation tube 31T passes through the accumulator shell 26 and the third through hole 28c through which the lower gas-liquid separation tube 31S passes through the accumulator shell 26 are arranged side by side in the circumferential direction of the accumulator shell 26. In addition, the upper compression part suction tube 102T and the lower compression part suction tube 102S are arranged side by side in the up-down direction of the compressor main body container 10. By arranging in this way, the total length of each of the upper connecting tube 104T and the lower connecting tube 104S can be suppressed, and at the same time, by arranging the second through hole 28b and the third through hole 28c side by side in the circumferential direction, the upper gas-liquid separation tube 31T and the lower gas-liquid separation tube 31S can be constructed with common components.

[0059] Specifically, if Figure 4 and Figure 5 As shown, the upper end 104Tb of the upper connecting pipe 104T and the upper end 104Sb of the lower connecting pipe 104S are arranged in the middle of the lower end 104Ta of the upper connecting pipe 104T and the lower end 104Sa of the lower connecting pipe 104S in the circumferential direction of the compressor main container 10. Therefore, with respect to the lower connecting pipe 104S bent in a U-shape from the lower end 104Sa toward the upper end 104Sb, the upper connecting pipe 104T extends from the radially outer side of the compressor main container 10 to intersect with the lower connecting pipe 104S. As a result, the length of the upper connecting pipe 104T and the lower connecting pipe 104S protruding in the radial direction of the compressor main container 10, that is, the radial length, is suppressed, and the rotary compressor 1 becomes compact as a whole.

[0060] like Figure 1 and Figure 4 As shown, the upper end portion 104Tb of the upper connecting pipe 104T is connected to the upper suction hole 135T of the upper cylinder 121T via the upper conduit 101T provided on the peripheral wall of the main shell 10a of the compressor main container 10 and the upper compression part suction pipe 102T embedded inside the upper conduit 101T. The upper end portion 104Sb of the lower connecting pipe 104S is connected to the lower suction hole 135S of the lower cylinder 121S via the lower conduit 101S provided on the peripheral wall of the main shell 10a of the compressor main container 10 and the lower compression part suction pipe 102S embedded inside the lower conduit 101S.

[0061] Therefore, outside the liquid storage tank shell 26, one side end 31Ta of the upper gas-liquid separation tube 31T is connected to the upper compression part suction pipe 102T via the upper connecting pipe 104T. One side end 31Sa of the lower gas-liquid separation tube 31S is connected to the lower compression part suction pipe 102S via the lower connecting pipe 104S outside the liquid storage tank shell 26. Since the upper suction channel and the lower suction channel for transporting the refrigerant from the liquid storage container 25 to the compression part 12 are independently arranged like this, for example, by adjusting the respective lengths of the upper connecting pipe 104T and the lower connecting pipe 104S to the required length, the length of the upper suction passage and the length of the lower suction passage can be easily adjusted, thereby appropriately obtaining the above-mentioned boosting effect. As a result, the present embodiment achieves an improvement in volumetric efficiency based on the boosting effect, thereby improving the performance of the rotary compressor 1.

[0062] In addition, in the present embodiment, the upper connecting pipe 104T is arranged to intersect the lower connecting pipe 104S from the radially outer side of the compressor main body container 10 relative to the lower connecting pipe 104S, but the connection structure of the upper connecting pipe 104T and the lower connecting pipe 104S is not limited. For example, the lower connecting pipe 104S may be arranged to intersect the upper connecting pipe 104T from the radially outer side of the compressor main body container 10 relative to the upper connecting pipe 104T by connecting the upper end 104Tb of the upper connecting pipe 104T to the lower compression part suction pipe 102S and connecting the upper end 104Sb of the lower connecting pipe 104S to the upper compression part suction pipe 102T.

[0063] In addition, a filter (not shown) for capturing foreign matter contained in the refrigerant supplied from the accumulator suction pipe 27 to each upper gas-liquid separation tube 31T and the lower gas-liquid separation tube 31S, or a support plate (not shown) for supporting the other side ends 31Tb, 31Sb of the upper gas-liquid separation tube 31T and the lower gas-liquid separation tube 31S may also be provided inside the accumulator shell 26.

[0064] Effects of the Embodiments

[0065] Here, this embodiment will be described by comparing with the above-mentioned Patent Documents 1 to 2. The compressor of Patent Document 1 has a compressor body container and a liquid storage container which are each independent, whereas the rotary compressor 1 of the embodiment uses the lower shell 10c as a part of the compressor body container 10 and a part of the liquid storage container 25.

[0066] The compressor of patent document 2 is provided with a compression part suction pipe penetrating the lower shell on the lower shell of the compressor main body container, and the refrigerant inside the liquid storage container is directly sucked into the compression part via the gas-liquid separation pipe connected to the compression part suction pipe. The compression part suction pipe penetrating the lower shell is welded and fixed to the lower shell inside the liquid storage container. In contrast, in the rotary compressor of the embodiment, the upper gas-liquid separation pipe 31T and the lower gas-liquid separation pipe 31S for transporting gas refrigerant from the inside of the liquid storage container penetrate the side wall of the liquid storage container shell 26 and are fixed to the second through hole 28b and the third through hole 28c of the liquid storage shell 26 by welding such as brazing. The upper gas-liquid separation pipe 31T and the lower gas-liquid separation pipe 31S are fixed to the upper connecting pipe 104T and the lower connecting pipe 104S by welding such as brazing outside the liquid storage container 25, thereby connecting to the upper compression part suction pipe 102T and the lower compression part suction pipe 102S.

[0067] As described above, the rotary compressor 1 of the embodiment uses the lower shell 10c as both a part of the compressor body container 10 and a part of the liquid storage container 25, thereby providing a compressor with reduced manufacturing costs compared to a structure with independent compressor body containers and liquid storage containers.

[0068] Furthermore, in the rotary compressor 1 of the embodiment, the upper gas-liquid separation tube 31T and the lower gas-liquid separation tube 31S for conveying gas refrigerant from the inside of the liquid storage container 25 penetrate the side wall of the liquid storage container 26 and are fixed to the second through hole 28b and the third through hole 28c of the liquid storage container 26 by welding such as brazing. The upper gas-liquid separation tube 31T and the lower gas-liquid separation tube 31S are fixed to the lower end portions 104Ta and 104Sa of the upper connecting tube 104T and the lower connecting tube 104S by welding such as brazing outside the liquid storage container 25, and the upper end portions 104Tb and 104Sb of the upper connecting tube 104T and the lower connecting tube 104S are fixed to the upper compression section suction tube 102T and the lower compression section suction tube 102S by welding such as brazing. Therefore, the welding parts of the upper gas-liquid separation tube 31T, the upper connecting tube 104T, the upper compression part suction tube 102T, and the welding parts of the lower gas-liquid separation tube 31S, the lower connecting tube 104S, and the lower compression part suction tube 102S are located outside the liquid storage container 25, and poor welding can be easily detected, thereby providing a highly reliable compressor.

[0069] In addition, the upper gas-liquid separation tube 31T is connected to the upper compression part suction tube 102T via the upper connecting tube 104T, and the lower gas-liquid separation tube 31S is connected to the lower compression part suction tube 102S via the lower connecting tube 104S, and the upper suction channel and the lower suction channel for transporting the refrigerant from the liquid storage container 25 to the compression part 12 are independently set. Therefore, the length of the upper suction passage and the length of the lower suction passage can be easily adjusted by adjusting the respective lengths of the upper connecting tube 104T and the lower connecting tube 104S to the required length, so as to appropriately obtain the above-mentioned boosting effect. Therefore, this embodiment can achieve an improvement in volumetric efficiency based on the boosting effect and provide a high-performance compressor.

[0070] Furthermore, in the rotary compressor 1 of the embodiment, on the accumulator shell 26, the second through hole 28b through which the upper gas-liquid separation tube 31T passes through the accumulator shell 26 and the third through hole 28c through which the lower gas-liquid separation tube 31S passes through the accumulator shell 26 are arranged side by side in the circumferential direction of the accumulator shell 26, and the upper compression part suction tube 102T and the lower compression part suction tube 102S are arranged side by side in the vertical direction of the compressor main body container 10. By arranging the upper connecting tube 104T and the lower connecting tube 104S in this way, the total length of each of the upper connecting tube 104T and the lower connecting tube 104S can be suppressed, and by arranging the second through hole 28b and the third through hole 28c side by side in the circumferential direction, the upper gas-liquid separation tube 31T and the lower gas-liquid separation tube 31S can be constructed with common components.

[0071] Furthermore, on the accumulator housing 26 of the rotary compressor 1 of the embodiment, the first through hole 28a through which the accumulator suction pipe 27 passes through the accumulator housing 26, the second through hole 28b through which the upper gas-liquid separation pipe 31T passes through the accumulator housing 26, and the third through hole 28c through which the lower gas-liquid separation pipe 31S passes through the accumulator housing 26 are arranged adjacent to each other in the circumferential direction of the accumulator housing 26. Thus, the accumulator suction pipe 27, one side end 31Ta of the upper gas-liquid separation pipe 31T, one side end 31Sa of the lower gas-liquid separation pipe 31S, the upper connecting pipe 104T, and the lower connecting pipe 104S can be centrally arranged in the circumferential direction of the accumulator housing 26, so that the rotary compressor 1 can be made compact as a whole.

[0072] Furthermore, the present embodiment has been described by taking the rotary compressor 1 as an example, but the present embodiment can also be applied to other compressors such as a scroll compressor, and the same effects as those of the present embodiment can be obtained.

[0073] Explanation of symbols

[0074] 1 Rotary compressor

[0075] 10 Compressor body container

[0076] 10a main housing

[0077] 10b Upper housing

[0078] 10c Lower housing

[0079] 11 Electric Motor

[0080] 12 Compression

[0081] 25 liquid storage container

[0082] 26 Reservoir housing

[0083] 26a Open side

[0084] 27 Receiver suction pipe

[0085] 28a First through hole

[0086] 28b Second through hole

[0087] 28c Third through hole

[0088] 31T upper gas-liquid separation tube

[0089] 31Ta one side end

[0090] 31Tb other side end

[0091] 31S lower gas-liquid separation tube

[0092] 31Sa one side end

[0093] 31Sb The other side end

[0094] 101T Upper guide tube

[0095] 101S Downcomer

[0096] 102T Upper compression part suction pipe

[0097] 102S Lower compression part suction pipe

[0098] 104T upper connecting pipe

[0099] 104Tb upper end

[0100] 104Ta lower end

[0101] 104S lower connecting pipe

[0102] 104Sb upper end

[0103] 104Sa lower end

[0104] 121T upper cylinder

[0105] 121S Lower Cylinder

[0106] 135T Upper suction port

[0107] 135S lower suction port

Claims

1. A sealed compressor, The compressor main body container in a vertical cylindrical shape contains: a compression unit that sucks in refrigerant and discharges the compressed refrigerant into the compressor main body container; and a motor that drives the compression unit. A liquid storage container is provided below the compressor main body container, which is used to separate the refrigerant gas and liquid sucked from the refrigeration cycle and supply the gas refrigerant to the compression part. The sealed compressor is characterized in that: The compression part comprises an upper cylinder and a lower cylinder, the upper suction hole of the upper cylinder is connected to an upper compression part suction pipe, and the lower suction hole of the lower cylinder is connected to a lower compression part suction pipe. The liquid storage container has a cup-shaped liquid storage housing, and the opening side of the liquid storage housing is welded and fixed to the compressor main body container. On the liquid reservoir shell, a liquid reservoir suction pipe for sucking refrigerant from the refrigeration cycle into the liquid reservoir container, and an upper gas-liquid separation pipe and a lower gas-liquid separation pipe for transporting gas refrigerant from the liquid reservoir container pass through the side wall of the liquid reservoir shell and are respectively welded and fixed to the first through hole, the second through hole and the third through hole of the liquid reservoir shell. The upper gas-liquid separation pipe is connected to the upper compression part suction pipe via an upper connecting pipe outside the liquid reservoir shell, and the lower gas-liquid separation pipe is connected to the lower compression part suction pipe via a lower connecting pipe outside the liquid reservoir shell. On the liquid reservoir shell, the second through hole for the upper gas-liquid separation tube to pass through the liquid reservoir shell and the third through hole for the lower gas-liquid separation tube to pass through the liquid reservoir shell are arranged side by side in the circumferential direction of the liquid reservoir shell. The upper compression part suction pipe and the lower compression part suction pipe are arranged in parallel in the vertical direction of the compressor main body container.

2. The sealed compressor according to claim 1, characterized in that: In the accumulator case, the first through hole through which the accumulator suction pipe passes through the accumulator case, the second through hole, and the third through hole are arranged adjacent to each other in the circumferential direction of the accumulator case.

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