Hermetic compressor

Abstract

To improve efficiency of work of welding each wiring member forming a suction path conveying refrigerant to a compression portion from an accumulator container to a compressor main body container and the accumulator container.SOLUTION: In a compression portion of a hermetic compressor, an upper compression portion suction pipe is connected to an upper suction hole of an upper cylinder, and a lower compression portion suction pipe is connected to a lower suction hole of a lower cylinder. A first through-hole and a second through-hole passing through the accumulator container are formed in the accumulator container. A first gas-liquid separation pipe penetrates the first through-hole and is fixed by being welded to the first through-hole. A second gas-liquid separation pipe penetrates the second through-hole, and is fixed by being welded to the second through-hole. The first gas-liquid separation pipe is connected to the upper compression portion suction pipe via a first communication pipe outside the accumulator container, and the second gas-liquid separation pipe is connected to the lower compression portion suction pipe via a second communication pipe outside the accumulator container, The upper compression portion suction pipe and the lower compression portion suction pipe are disposed in such a way as to align in the vertical direction of a compressor main body container. The first through-hole and the second through-hole are disposed in such a way as to align in the vertical direction of the accumulator container.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a hermetic compressor. [Background technology]

[0002] Known hermetic compressors include a vertical cylindrical compressor main body container that houses a compression section and a motor that drives the compression section, and an accumulator container that separates the refrigerant into gas refrigerant and liquid refrigerant (hereinafter referred to as gas-liquid separation of the refrigerant) and draws only the gas refrigerant into the compression section. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-109283 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-150973 Summary of the Invention [Problem to be solved by the invention]

[0004] In the compressor of Patent Document 1, an accumulator container that separates the gas and liquid refrigerant sucked into the compression section is disposed below the compressor main body container, which prevents the hermetic compressor from becoming larger in size compared to when the accumulator container is disposed on the outer periphery of the side surface of the compressor main body container.

[0005] In the hermetic compressor of Patent Document 1, an accumulator suction pipe that draws refrigerant into the accumulator container and a gas-liquid separation pipe that sends gaseous refrigerant from the inside of the accumulator container to the compression section inside the compressor main container are fixed by passing through a through hole formed in the side wall of the accumulator container and a through hole formed in the side surface of the compressor main container.

[0006] The compressor of Patent Document 2 is a so-called two-cylinder rotary compressor in which the compression section of the compressor main body container is equipped with two cylinders, an upper cylinder and a lower cylinder, and is equipped with two independent suction paths: a first suction path that sends gaseous refrigerant from the inside of the accumulator container to the upper cylinder chamber of the compressor main body container, and a second suction path that sends gaseous refrigerant from the inside of the accumulator container to the lower cylinder chamber of the compressor main body container.In addition, in the compressor of Patent Document 2, piping members that pass through through holes formed in the side of the compressor main body container are fixed to the compressor main body container by welding or brazing.

[0007] Here, in a hermetic compressor in which an accumulator container is arranged below a compressor main body container as described in Patent Document 1, when two cylinders, an upper cylinder and a lower cylinder, are provided, it is conceivable to provide two through holes on the side of the accumulator container and the side of the compressor main body container, respectively, for passing piping members that form two independent suction paths, and to fix each of the piping members that form the two suction paths to each through hole by welding or brazing.

[0008] However, in this case, the number of welds required to weld the piping members that form the two suction paths to the compressor main body container and the accumulator container increases, which reduces the work efficiency in the welding process.

[0009] The disclosed technology has been made in consideration of the above, and aims to provide a hermetic compressor in which an accumulator container is arranged below a compressor main body container, and which can improve work efficiency when welding each piping component that forms a refrigerant suction path. [Means for solving the problem]

[0010] In one aspect of the hermetic compressor disclosed herein, a vertically cylindrical compressor main container houses a compression unit that compresses a refrigerant and discharges it into the compressor main container, and a motor that drives the compression unit. An accumulator container is provided below the compressor main container, separating the refrigerant into a gas refrigerant and a liquid refrigerant and supplying the gas refrigerant to the compression unit. The compression unit has an upper cylinder and a lower cylinder, and an upper compression unit suction pipe is connected to an upper suction hole of the upper cylinder, and a lower compression unit suction pipe is connected to a lower suction hole of the lower cylinder. The accumulator container has a first through hole and a second through hole that penetrate the side wall of the accumulator container. A first gas-liquid separation pipe that transports gas refrigerant from inside the accumulator container penetrates the first through hole of the accumulator container and is fixed by welding to the first through hole. A second gas-liquid separation pipe that transports gas refrigerant from inside the accumulator container penetrates a second through hole of the accumulator container and is fixed by welding to the second through hole. The first gas-liquid separation pipe is connected to the upper compression section suction pipe via a first connecting pipe outside the accumulator container. The second gas-liquid separation pipe is connected to the lower compression section suction pipe via a second connecting pipe outside the accumulator container. The upper compression section suction pipe and the lower compression section suction pipe are arranged side by side in the vertical direction of the compression section main body container. The first through hole and the second through hole of the accumulator container are arranged side by side in the vertical direction of the accumulator container. [Effects of the Invention]

[0011] According to one aspect of the hermetic compressor disclosed in the present application, in a structure in which an accumulator container is disposed below a compressor main body container, it is possible to improve work efficiency when welding each piping member that forms a refrigerant suction path. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a vertical cross-sectional view showing a rotary compressor according to a first embodiment. [Figure 2] FIG. 2 is an exploded perspective view showing a compression unit of the rotary compressor of the first embodiment. [Figure 3] FIG. 3 is a perspective view showing a main part of the rotary compressor of the first embodiment. [Figure 4] FIG. 4 is a side view showing a main part of the rotary compressor of the first embodiment. [Figure 5] FIG. 5 is a perspective view showing the inside of the accumulator container in the first embodiment. [Figure 6] FIG. 6 is a plan view showing the inside of the accumulator container in the first embodiment in a see-through manner. [Figure 7] FIG. 7 is a side view showing the inside of the accumulator container in the first embodiment in a see-through manner. [Figure 8] FIG. 8 is a perspective view showing a main part of a rotary compressor according to a second embodiment. [Figure 9] FIG. 9 is a side view showing a main part of the rotary compressor of the second embodiment. [Figure 10] FIG. 10 is a side view showing a main part of a rotary compressor according to a third embodiment. [Figure 11] FIG. 11 is a side view showing a main part of the rotary compressor of the fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments of the hermetic compressor disclosed in the present application will be described in detail with reference to the drawings. However, the hermetic compressor disclosed in the present application is not limited to the following embodiments. [Example]

[0014] (Configuration of a rotary compressor) In this embodiment, a rotary compressor will be described as an example of a hermetic compressor. Fig. 1 is a vertical cross-sectional view showing the rotary compressor of the first embodiment. Fig. 2 is an exploded perspective view showing a compression section of the rotary compressor of the first embodiment. Fig. 3 is a perspective view showing a main part of the rotary compressor of the first embodiment. Fig. 4 is a side view showing a main part of the rotary compressor of the first embodiment.

[0015] As shown in FIG. 1, the rotary compressor 1 is an internal high-pressure hermetic compressor that houses a compression section 12 that draws in refrigerant from an upper compression section suction pipe 102T and a lower compression section suction pipe 102S, compresses the refrigerant, and discharges the compressed refrigerant into the compressor main body vessel 10, and a motor 11 that drives the compression section 12, and discharges the high-pressure refrigerant compressed in the compression section 12 into the compressor main body vessel 10 and further into the refrigeration cycle through a discharge pipe 107.

[0016] 1, 3, and 4, the compressor main body casing 10 has a vertical cylindrical main shell 10a, a cup-shaped top shell 10b, and a cup-shaped bottom shell 10c. The compressor main body casing 10 is constructed by fixing an opening side 10g of the top shell 10b to the upper end of the main shell 10a by welding, and fixing an opening side 10d of the bottom shell 10c to the lower end of the main shell 10a by welding.

[0017] An upper compression section suction pipe 102T and a lower compression section suction pipe 102S are provided to penetrate the main shell 10a for drawing low-pressure refrigerant from the refrigeration cycle into the compression section 12. More specifically, an upper guide pipe 101T is brazed to the main shell 10a, and the upper compression section suction pipe 102T is fixed to the upper guide pipe 101T by passing through the inside of the upper guide pipe 101T and being brazed to the upper guide pipe 101T. Similarly, a lower guide pipe 101S is brazed to the main shell 10a, and the lower compression section suction pipe 102S is fixed to the lower guide pipe 101S by passing through the inside of the lower guide pipe 101S and being brazed to the lower guide pipe 101S.

[0018] A discharge pipe 107 is provided penetrating the top shell 10b for discharging the high-pressure refrigerant compressed in the compression section 12 from the inside of the compressor main body vessel 10 to the refrigeration cycle. The discharge pipe 107 is fixed to the top shell 10b by being directly brazed.

[0019] 1, 3, 4, and 7, an accumulator container 25 is provided below the compressor main body container 10. The accumulator container 25 separates gas and liquid from the low-pressure refrigerant drawn from the refrigeration cycle and draws only the gaseous refrigerant into the compression section 12. The accumulator container 25 has a cup-shaped accumulator shell 26, and an opening side 26a of the accumulator shell 26 is fixed to the bottom shell 10c of the compressor main body container 10 by welding. Therefore, the bottom shell 10c of the compressor main body container 10 also serves as a lid that closes the opening side 26a of the accumulator shell 26.

[0020] The accumulator shell 26 is formed with a first through hole 28b, a second through hole 28c, and a third through hole 28a that penetrate the side wall of the accumulator shell 26. A first gas-liquid separation pipe 31T, which sends gaseous refrigerant from the inside of the accumulator container 25, penetrates the first through hole 28b of the accumulator shell 26 and is fixed by being welded to the first through hole 28b. Similarly, a second gas-liquid separation pipe 31S, which sends gaseous refrigerant from the inside of the accumulator container 25, penetrates the second through hole 28c of the accumulator shell 26 and is fixed by being welded to the second through hole 28c. Furthermore, an accumulator suction pipe 27, which draws refrigerant from the refrigeration cycle into the accumulator container 25, penetrates the third through hole 28a of the accumulator shell 26 and is fixed by being welded to the third through hole 28a.

[0021] The first gas-liquid separation pipe 31T is connected to the upper compression section suction pipe 102T via a first connecting pipe 104T outside the accumulator vessel 25. The second gas-liquid separation pipe 31S is connected to the lower compression section suction pipe 102S via a second connecting pipe 104S outside the accumulator vessel 25.

[0022] As shown in FIG. 1, a base member 310 that supports the entire rotary compressor 1 is fixed by welding to a lower portion of the accumulator shell 26, that is, the counter-opening side 26b opposite to the opening side 26a.

[0023] As shown in Figures 1 and 2, the compression section 12 has an upper cylinder 121T, a lower cylinder 121S, an intermediate partition plate 140, an upper end plate 160T, a lower end plate 160S, and a rotating shaft 15. The upper end plate 160T, the upper cylinder 121T, the intermediate partition plate 140, the lower cylinder 121S, and the lower end plate 160S are stacked in this order and fixed with 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 sub-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 sub-shaft portion 151. The main shaft portion 153 of the rotating shaft 15 is fitted to the main bearing portion 161T of the upper end plate 160T, and the sub-shaft portion 151 of the rotating shaft 15 is fitted to the sub-bearing portion 161S of the lower end plate 160S, so that the rotating shaft 15 is rotatably supported.

[0024] The motor 11 has a stator 111 disposed on the outside and a rotor 112 disposed on the inside. The stator 111 is fixed to the inner circumferential surface of the main shell 10a by shrink fitting. The rotor 112 is fixed to the rotating shaft 15 by shrink fitting.

[0025] The compressor main body container 10 is filled with lubricating oil 18 in an amount that nearly immerses the compression section 12, in order to lubricate the sliding members of the compression section 12 and to seal the high-pressure and low-pressure sections within the compression chamber.

[0026] Next, the compression section 12 will be described in detail using Figure 2. The upper cylinder 121T has a cylindrical upper hollow section 130T (upper cylinder chamber) therein, and an upper piston 125T is disposed in the upper hollow section 130T. The upper piston 125T is engaged with an upper eccentric section 152T of the rotary shaft 15. The lower cylinder 121S has a cylindrical lower hollow section 130S (lower cylinder chamber) therein, and a lower piston 125S is disposed in the lower hollow section 130S. The lower piston 125S is engaged with a lower eccentric section 152S of the rotary shaft 15.

[0027] The upper cylinder 121T has a groove extending from the upper hollow portion 130T to the outer periphery, and an upper vane 127T is disposed in the groove. The upper cylinder 121T has an upper spring hole 124T that leads from the outer periphery to the groove, and an upper spring 126T is disposed in the upper spring hole 124T. The lower cylinder 121S has a groove extending from the lower hollow portion 130S to the outer periphery, and a lower vane 127S is disposed in the groove. The lower cylinder 121S has a lower spring hole 124S that leads from the outer periphery to the groove, and a lower spring 126S is disposed in the lower spring hole 124S.

[0028] One end of the upper vane 127T is pressed against the upper piston 125T by the upper spring 126T, thereby dividing the space outside the upper piston 125T in the upper hollow portion 130T of the upper cylinder 121T into an upper suction chamber 131T and an upper discharge chamber 133T. The upper cylinder 121T is provided with an upper suction hole 135T that communicates with the upper suction chamber 131T from its outer periphery. The upper suction hole 135T is connected to the upper compression section suction pipe 102T. One end of the lower vane 127S is pressed against the lower piston 125S by the lower spring 126S, thereby dividing the space outside the lower piston 125S in the lower hollow portion 130S of the lower cylinder 121S into a lower suction chamber 131S and a lower discharge chamber 133S. The lower cylinder 121S is provided with a lower suction hole 135S that communicates with the lower suction chamber 131S from its outer periphery. The lower suction hole 135S is connected to the lower compression section suction pipe 102S.

[0029] The upper end plate 160T is provided with an upper discharge hole 190T that penetrates the upper end plate 160T and communicates with the upper discharge chamber 133T. An upper discharge valve 200T that opens and closes the upper discharge hole 190T and an upper discharge valve retainer 201T that restricts warping of the upper discharge valve 200T are fixed to the upper end plate 160T with upper rivets 202T. An upper end plate cover 170T that covers the upper discharge hole 190T is disposed above the upper end plate 160T, forming an upper end plate cover chamber 180T that is closed 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 with a plurality of bolts 175 that also secure the upper end plate 160T to the upper cylinder 121T. The upper end plate cover 170T is provided with an upper end plate cover discharge hole 172 that connects the upper end plate cover chamber 180T and the inside of the compressor main body container 10.

[0030] The lower end plate 160S is provided with a lower discharge hole 190S that penetrates the lower end plate 160S and communicates with the lower discharge chamber 133S. A lower discharge valve 200S that opens and closes the lower discharge hole 190S and a lower discharge valve retainer 201S that restricts warping of the lower discharge valve 200S are fixed to the lower end plate 160S with lower rivets 202S. A lower end plate cover 170S that covers the lower discharge hole 190S is disposed below the lower end plate 160S, and a lower end plate cover chamber 180S that is closed by the lower end plate 160S and the lower end plate cover 170S is formed (see FIG. 1). The lower end plate cover 170S is fixed to the lower end plate 160S with a plurality of bolts 175 that also secure the lower end plate 160S to the lower cylinder 121S.

[0031] In addition, the compression section 12 is provided with a refrigerant passage hole 136 (see Figure 2) that penetrates the lower end plate 160S, the lower cylinder 121S, the intermediate 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.

[0032] The flow of refrigerant caused by the rotation of the rotary shaft 15 will be described below. As the rotary shaft 15 rotates, the upper piston 125T and the lower piston 125S fitted to the upper eccentric portion 152T and the lower eccentric portion 152S of the rotary shaft 15 revolve, causing the upper suction chamber 131T and the lower suction chamber 131S to expand in volume and draw in refrigerant. Low-pressure refrigerant from the refrigeration cycle is drawn into the accumulator container 25 through the accumulator suction pipe 27. If the refrigerant drawn into the accumulator container 25 contains liquid, it accumulates in the lower portion of the accumulator container 25, and only the gaseous refrigerant is drawn into the first gas-liquid separation pipe 31T and the second gas-liquid separation pipe 31S, which open upward inside the accumulator container 25. The gaseous refrigerant drawn into the first gas-liquid separation pipe 31T passes through the first connecting pipe 104T and the upper compression section suction pipe 102T and is drawn into the upper suction chamber 131T. Similarly, the gas refrigerant drawn into the second gas-liquid separation pipe 31S passes through the second connecting pipe 104S and the lower compression section suction pipe 102S, and is drawn into the lower suction chamber 131S.

[0033] When a large amount of liquid refrigerant is drawn from the refrigeration cycle, the liquid level of the liquid refrigerant inside the accumulator vessel 25 may rise above the openings of the other ends 31Tb, 31Sb of the first gas-liquid separation pipe 31T and the second gas-liquid separation pipe 31S, causing a large amount of liquid refrigerant to flow into the first gas-liquid separation pipe 31T and the second gas-liquid separation pipe 31S. If a large amount of liquid refrigerant flows into the compression section 12 through the first gas-liquid separation pipe 31T and the second gas-liquid separation pipe 31S, it may damage the compression section 12. To prevent a large amount of liquid refrigerant from flowing into the first gas-liquid separation pipe 31T and the second gas-liquid separation pipe 31S, the first gas-liquid separation pipe 31T and the second gas-liquid separation pipe 31S are provided with liquid return holes 34 for drawing the liquid refrigerant into the gas-liquid separation pipe 31 little by little.

[0034] Next, we will explain the flow of refrigerant discharged by rotation of the rotary shaft 15. As the rotary shaft 15 rotates, the upper piston 125T fitted to the upper eccentric portion 152T of the rotary shaft 15 revolves, causing the upper discharge chamber 133T to compress the refrigerant while reducing its volume. When the pressure of the compressed refrigerant becomes higher than the pressure in the upper end plate cover chamber 180T outside the upper discharge valve 200T, the upper discharge valve 200T opens and discharges the refrigerant from the upper discharge chamber 133T to the upper end plate cover chamber 180T. The refrigerant discharged into the upper end plate cover chamber 180T is discharged into the compressor main body container 10 through the upper end plate cover discharge hole 172 provided in the upper end plate cover 170T.

[0035] Furthermore, as the rotary shaft 15 rotates, the lower piston 125S fitted to the lower eccentric portion 152S of the rotary shaft 15 revolves, compressing the refrigerant in the lower discharge chamber 133S while reducing its volume, and when the pressure of the compressed refrigerant becomes higher than the pressure in the lower end plate cover chamber 180S outside the lower discharge valve 200S, the lower discharge valve 200S opens and discharges the refrigerant from the lower discharge chamber 133S to the lower end plate cover chamber 180S. The refrigerant discharged into the lower end plate cover chamber 180S passes through the refrigerant passage hole 136 and the upper end plate cover chamber 180T and is discharged into the compressor main body container 10 from the upper end plate cover discharge hole 172T provided in the upper end plate cover 170T.

[0036] The refrigerant discharged into the compressor main body container 10 is guided above the motor 11 through a notch (not shown) on the outer periphery of the stator 111 that connects the top and bottom, or a gap (not shown) in the winding section of the stator 111, or a gap 115 (see Figure 1) between the stator 111 and the rotor 112, and is discharged from a discharge pipe 107 located at the top of the compressor main body container 10.

[0037] Next, the flow of lubricating oil 18 will be described. Lubricating oil 18 sealed in the lower part of compressor main body container 10 is supplied to compression section 12 through the interior of the rotating shaft (not shown) due to the centrifugal force of the rotating shaft. Lubricating oil 18 supplied to compression section 12 is entrained in the refrigerant and turns into mist, which is then discharged together with the refrigerant into the inside of compressor main body container 10. The mist of lubricating oil 18 discharged into compressor main body container 10 is separated from the refrigerant by centrifugal force caused by the rotational force of motor 11, turns into oil droplets, and returns to the bottom of compressor main body container 10. However, some of the lubricating oil 18 is not separated and is discharged together with the refrigerant into the refrigeration cycle. The lubricating oil 18 discharged into the refrigeration cycle circulates through the refrigeration cycle and returns to accumulator container 25, where it is separated inside accumulator container 25 and accumulates in the bottom of accumulator container 25. The lubricating oil 18 accumulated in the lower part of the accumulator container 25 flows little by little through the liquid return hole 34 together with the liquid refrigerant into the first gas-liquid separation pipe 31T and the second gas-liquid separation pipe 31S, and is sucked into the upper suction chamber 131T and the lower suction chamber 131S together with the suction refrigerant.

[0038] (Characteristic structure of a rotary compressor) Next, a description will be given of a characteristic configuration of the rotary compressor 1 of the embodiment 1. The characteristics of the embodiment 1 include the structure of the accumulator container 25 directly joined to the bottom shell 10c of the compressor main body container 10, and the connection structure of the first connecting pipe 104T and the second connecting pipe 104S.

[0039] Fig. 5 is a perspective view showing the inside of the accumulator container 25 in Example 1. Fig. 6 is a plan view showing the inside of the accumulator container 25 in Example 1 in a see-through manner. Fig. 7 is a side view showing the inside of the accumulator container 25 in Example 1 in a see-through manner. Note that in Fig. 1, for ease of understanding, the position of an accumulator suction pipe 27, which will be described later, is shifted in the circumferential direction of the accumulator shell 26, but this does not limit the position of the accumulator suction pipe 27.

[0040] First, in this embodiment, the bottom shell 10c of the compressor main body vessel 10 is fitted inside the accumulator shell 26, and the opening side 26a of the accumulator shell 26 is joined by welding around the circumferential direction of the peripheral wall of the bottom shell 10c (see FIG. 1). The accumulator vessel 25 is sealed by the inner peripheral surface of the accumulator shell 26 contacting the outer peripheral surface of the bottom shell 10c of the compressor main body vessel 10, and a weld is formed on the outer peripheral surface of the accumulator shell 26. Because the weld between the accumulator shell 26 and the compressor main body vessel 10 faces the outside of the rotary compressor 1, it is easy to check for gas leakage from the weld. For example, after filling the inside of the accumulator container 25 (accumulator shell 26) with a gas for inspection (nitrogen or the like), the piping (for example, the accumulator suction pipe 27) connecting the inside of the accumulator container 25 to the outside is sealed, and the accumulator container 25 integrated with the compressor main body container 10 is submerged in water to check for gas leakage from the welded parts facing the outside of the rotary compressor 1, thereby making it possible to inspect whether the airtightness of the accumulator container 25 is ensured (whether there are any welding defects). This makes it easy to inspect the airtightness of the accumulator shell 26, making it easy to ensure the reliability of the airtight state.

[0041] 1, 3, and 4, the accumulator shell 26 is connected to the upper hollow portion 130T (see FIG. 2) of the upper cylinder 121T via a first connecting pipe 104T connected to the first gas-liquid separation pipe 31T and an upper compression section suction pipe 102T. The accumulator shell 26 is also connected to the lower hollow portion 130S (see FIG. 2) of the lower cylinder 121S via a second connecting pipe 104S connected to the second gas-liquid separation pipe 31S and a lower compression section suction pipe 102S.

[0042] One end 31Ta of the first gas-liquid separation pipe 31T is connected to the first connecting pipe 104T, and the other end 31Tb penetrates the side wall of the accumulator shell 26 and extends toward the inside of the accumulator shell 26. The first gas-liquid separation pipe 31T extends radially from the position of the first through-hole 28b of the accumulator shell 26 and is bent downward, and then extends along the bottom surface of the interior of the accumulator shell 26, with the other end 31Tb bent upward in this interior. A portion of the first gas-liquid separation pipe 31T extends along the bottom surface of the interior of the accumulator shell 26, and a liquid return hole 34 is provided in this portion, so that the lubricating oil 18 remaining in the lower part of the accumulator container 25 can be effectively returned to the inside of the compressor main body container 10 via the first gas-liquid separation pipe 31T together with a small amount of liquid refrigerant. Furthermore, one end 31Ta of the first gas-liquid separation pipe 31T penetrates the side wall of the accumulator shell 26 and is fixed by welding to the first through hole 28b of the accumulator shell 26. Similarly, one end 31Sa of the second gas-liquid separation pipe 31S is connected to the second connecting pipe 104S, and the other end 31Sb penetrates the side wall of the accumulator shell 26 and extends toward the inside of the accumulator shell 26. The second gas-liquid separation pipe 31S extends radially from the position of the second through hole 28c of the accumulator shell 26 and is bent downward, and then extends along the bottom surface of the interior of the accumulator shell 26 and the other end 31Sb is bent upward inside the accumulator shell 26. A portion of the second gas-liquid separation pipe 31S extends along the bottom surface inside the accumulator shell 26, and a liquid return hole 34 is provided in this portion, so that the lubricating oil 18 that has accumulated in the lower part of the accumulator vessel 25 can be effectively returned to the inside of the compressor main body vessel 10 together with a small amount of liquid refrigerant via the second gas-liquid separation pipe 31S. In addition, one end 31Sa of the second gas-liquid separation pipe 31S penetrates the side wall of the accumulator shell 26 and is fixed to the second through-hole 28c of the accumulator shell 26 by welding.

[0043] That is, inside the accumulator shell 26, the first gas-liquid separation pipe 31T and the second gas-liquid separation pipe 31S extend parallel to each other at a predetermined height along the bottom surface inside the accumulator shell 26 and are bent upward so as not to contact each other. The open end of the other end 31Tb of the first gas-liquid separation pipe 31T and the open end of the other end 31Sb of the second gas-liquid separation pipe 31S are positioned at the same height in the up-down direction of the accumulator shell 26. This makes it possible to prevent a large amount of liquid refrigerant from flowing into the gas-liquid separation pipe with the lower open end of the two gas-liquid separation pipes 31T, 31S.

[0044] One end 31Ta of the first gas-liquid separation pipe 31T and one end 31Sa of the second gas-liquid separation pipe 31S are arranged side by side in the up-down direction on the outer peripheral surface of the accumulator shell 26. The first gas-liquid separation pipe 31T and the second gas-liquid separation pipe 31S extend parallel to each other at a distance from each other along the bottom surface of the accumulator shell 26 inside the accumulator shell 26. This allows the lubricating oil 18 that has accumulated in the lower part of the accumulator container 25 to be returned evenly from the two gas-liquid separation pipes, the first gas-liquid separation pipe 31T and the second gas-liquid separation pipe 31S, to the inside of the compressor main body container 10. The other end 31Tb of the first gas-liquid separation pipe 31T and the other end 31Sb of the second gas-liquid separation pipe 31S extend above the position of one end 27a of the accumulator suction pipe 27. This makes it possible to prevent the liquid refrigerant that has flowed into the accumulator vessel 25 from the accumulator suction pipe 27 from directly flowing into the first gas-liquid separation pipe 31T and the second gas-liquid separation pipe 31S.

[0045] 6, when viewed from the top and bottom of the accumulator shell 26, inside the accumulator shell 26, the first gas-liquid separation pipe 31T is bent in one direction from the position of the first through hole 28b that penetrates the accumulator shell 26, and the second gas-liquid separation pipe 31S is bent in the opposite direction from the position of the second through hole 28c that penetrates the accumulator shell 26. This ensures that the first gas-liquid separation pipe 31T and the second gas-liquid separation pipe 31S extend parallel to each other at a predetermined height along the bottom surface of the interior of the accumulator shell 26 from the first through hole 28b and second through hole 28c that are aligned in the vertical direction.

[0046] One end 27a of the accumulator suction pipe 27 penetrates the side wall of the accumulator shell 26 and extends into the accumulator shell 26. The one end 27a that penetrates the side wall of the accumulator shell 26 is fixed to a third through hole 28a in the accumulator shell 26 by welding. The other end 27b of the accumulator suction pipe 27 extends upward in the accumulator shell 26 and is connected to low-pressure piping (not shown) that forms part of the refrigeration cycle. As shown in FIGS. 3 and 6, the third through hole 28a of the accumulator suction pipe 27 is disposed adjacent to the first through hole 28b of the first gas-liquid separation pipe 31T in the circumferential direction of the accumulator shell 26.

[0047] In this way, the accumulator suction pipe 27, the first gas-liquid separation pipe 31T, and the second gas-liquid separation pipe 31S are arranged together in one location in the circumferential direction of the accumulator shell 26 as shown in Fig. 3, which makes it possible to arrange the accumulator suction pipe 27, the first connecting pipe 104T, and the second connecting pipe 104S together in the circumferential direction of the accumulator shell 26, thereby forming a compact rotary compressor 1 as a whole. Note that the position of the accumulator suction pipe 27 is not limited to the position shown in Figs. 5 and 6, and it may be arranged at a position away from the side where the first connecting pipe 104T and the second connecting pipe 104S are located in the circumferential direction of the accumulator shell 26, as shown in Fig. 1.

[0048] 1, 3, and 4, the first connecting pipe 104T has a lower end 104Ta connected to one end 31Ta of the first gas-liquid separation pipe 31T and an upper end 104Tb connected to the upper compression section suction pipe 102T, and is arranged along the outer peripheral surface of the accumulator shell 26 and the outer peripheral surface of the compressor main body vessel 10. Similarly, the second connecting pipe 104S has a lower end 104Sa connected to one end 31Sa of the second gas-liquid separation pipe 31S and an upper end 104Sb connected to the lower compression section suction pipe 102S, and is arranged along the outer peripheral surface of the accumulator shell 26 and the outer peripheral surface of the compressor main body vessel 10.

[0049] The first gas-liquid separation pipe 31T is connected to the first connecting pipe 104T and passes through the first through hole 28b of the accumulator shell 26. The second through holes 28c, through which the second gas-liquid separation pipe 31S connected to the second connecting pipe 104S passes through the accumulator shell 26, are arranged side by side in the up-down direction of the accumulator shell 26, as shown in FIGS. 3 and 4. In the first embodiment, as shown in FIGS. 4 and 5, the second through hole 28c, through which the second gas-liquid separation pipe 31S passes through the accumulator shell 26, is arranged above the first through hole 28b, through which the first gas-liquid separation pipe 31T passes through the accumulator shell 26, in the up-down direction of the accumulator shell 26. Furthermore, the upper compression section suction pipe 102T and the lower compression section suction pipe 102S are arranged side by side in the up-down direction of the compressor main body container 10. The upper compression section suction pipe 102T is disposed above the lower compression section suction pipe 102S in the up-down direction of the compressor main body container 10.

[0050] Therefore, the first through hole 28b, the second through hole 28c, the upper compression section suction pipe 102T, and the lower compression section suction pipe 102S are each arranged on a straight line L that extends along the vertical direction of the accumulator container 25 and the compressor main body container 10. Here, the fact that each through hole (28b, 28c) and each compression section suction pipe (102T, 102S) is arranged on a straight line L that extends along the vertical direction means that when each through hole or each compression section suction pipe is viewed from the radial direction of the compressor main body container 10 and the accumulator container 25, at least a portion of each through hole or each compression section suction pipe overlaps with the straight line L. By arranging them in this manner, when welding the piping components that form the suction path that sends refrigerant from the accumulator container 25 to the compression section 12, namely the upper compression section suction pipe 102T, the lower compression section suction pipe 102S, the first gas-liquid separation pipe 31T, the second gas-liquid separation pipe 31S, the first connecting pipe 104T, and the second connecting pipe 104S, to the compressor main body container 10 and the accumulator container 25, the position of the welding torch that forms the weld can be moved in one direction in the vertical direction of the compressor main body container 10 and the accumulator container 25, and welding can be performed without moving the compressor main body container 10 and the accumulator container 25 in their circumferential direction, thereby improving welding workability and shortening the welding time.

[0051] 1, 3, and 4, the upper end 104Tb of the first connecting pipe 104T is connected to the upper suction hole 135T of the upper cylinder 121T via an upper guide pipe 101T provided on the peripheral wall of the main shell 10a of the compressor main body vessel 10 and an upper compression section suction pipe 102T fitted inside the upper guide pipe 101T. The upper end 104Sb of the second connecting pipe 104S is connected to the lower suction hole 135S of the lower cylinder 121S via a lower guide pipe 101S provided on the peripheral wall of the main shell 10a of the compressor main body vessel 10 and a lower compression section suction pipe 102S fitted inside the lower guide pipe 101S.

[0052] Therefore, one end 31Ta of the first gas-liquid separation pipe 31T is connected to the upper compression section suction pipe 102T via the first connecting pipe 104T outside the accumulator shell 26. One end 31Sa of the second gas-liquid separation pipe 31S is connected to the lower compression section suction pipe 102S via the second connecting pipe 104S outside the accumulator shell 26. In this way, a first suction path that sends refrigerant from the accumulator vessel 25 to the upper cylinder 121T (upper hollow portion 130T) of the compression section 12, and a second suction path that sends refrigerant from the accumulator vessel 25 to the lower cylinder 121S (lower hollow portion 130S) of the compression section 12 are provided independently. In this embodiment, the first and second connecting pipes 104T and 104S are provided independently. By adjusting the lengths of the first and second connecting pipes 104T and 104S to desired lengths, the lengths of the first and second suction passages can be easily adjusted to obtain an appropriate supercharging effect. This allows the present embodiment to achieve improved volumetric efficiency through the supercharging effect, thereby enhancing the performance of the rotary compressor 1. The supercharging effect is a phenomenon in which the pressure in the gas-liquid separation pipe of the accumulator vessel periodically fluctuates with changes in the volume of the hollow portion (cylinder chamber) of the cylinder in the compression section. This causes the natural frequency of the gas-liquid separation pipe to match the frequency of the compression section, resulting in resonance. This significantly increases the pressure change in the gas-liquid separation pipe, forcing excess refrigerant into the cylinder chamber. This technology enhances the volumetric efficiency of the compressor by adjusting the length of the suction passage to cause resonance in the suction passage when the compressor is operated at a predetermined rotation speed. This technology amplifies the pressure fluctuation in the suction passage and enhances the volumetric efficiency of the compressor.

[0053] Furthermore, a second connecting pipe 104S is disposed between the first connecting pipe 104T and each of the outer peripheral surfaces of the compressor main body container 10 and the accumulator container 25. For this reason, when the first connecting pipe 104T is viewed from the radial direction of the compressor main body container 10 and the accumulator container 25 (when the first connecting pipe 104T is viewed from the right side in FIG. 4), the second connecting pipe 104S is disposed so as to overlap and be hidden by the first connecting pipe 104T. In other words, in the circumferential direction of the compressor main body container 10 and the accumulator container 25, piping members such as the first connecting pipe 104T and the second connecting pipe 104S are gathered in the portion along the straight line L on which the first through hole 28b, the second through hole 28c, the upper compression section suction pipe 102T, and the lower compression section suction pipe 102S are respectively disposed. Therefore, when winding sound-insulating material (sound-absorbing material) (not shown) for reducing noise generated from the compressor main body vessel around the outer peripheral surfaces of the compressor main body vessel 10 and the accumulator vessel 25 in the circumferential direction, it is possible to align and fix both ends of the sound-insulating material in the circumferential direction of the outer peripheral surfaces with the portions along the straight line L. Specifically, by forming notches in the portions of both ends of the sound-insulating material that contact the respective piping members, it is possible to easily wind both ends of the sound-insulating material around the respective piping members. Therefore, even in a structure in which the first connecting pipe 104T, the second connecting pipe 104S, etc. are arranged along the outer peripheral surfaces of the compressor main body vessel 10 and the accumulator vessel 25, it is possible to prevent a decrease in the ease of winding the sound-insulating material.

[0054] In addition, the inside of the accumulator shell 26 may be provided with a filter (not shown) that captures foreign matter contained in the refrigerant supplied from the accumulator suction pipe 27 to the first gas-liquid separation pipe 31T and the second gas-liquid separation pipe 31S, and a support plate (not shown) that supports the other ends 31Tb, 31Sb of the first gas-liquid separation pipe 31T and the second gas-liquid separation pipe 31S.

[0055] (Effects of Example 1) As described above, in the rotary compressor 1 of the first embodiment, the upper compression section suction pipe 102T and the lower compression section suction pipe 102S are arranged side by side in the up-down direction of the compressor main body container 10. In the accumulator shell 26, the first through-hole 28b through which the first gas-liquid separation pipe 31T penetrates the accumulator shell 26 and the second through-hole 28c through which the second gas-liquid separation pipe 31S penetrates the accumulator shell 26 are arranged side by side in the up-down direction of the accumulator container 25. As a result, when welding the piping components that form the suction path that sends refrigerant from the accumulator container 25 to the compression section 12, namely the upper compression section suction pipe 102T, the lower compression section suction pipe 102S, the first gas-liquid separation pipe 31T, the second gas-liquid separation pipe 31S, the first connecting pipe 104T, and the second connecting pipe 104S, to the compressor main body container 10 and the accumulator container 25, the position of the welding torch that forms the weld is moved in one direction in the vertical direction of the compressor main body container 10 and the accumulator container 25, and movement of the compressor main body container 10 and the accumulator container 25 in their circumferential direction is suppressed, thereby improving welding workability and shortening welding time.

[0056] Furthermore, in the rotary compressor 1 of the first embodiment, the first through hole 28b, the second through hole 28c, the upper compression section suction pipe 102T, and the lower compression section suction pipe 102S are each arranged on a straight line L that extends along the vertical direction of the accumulator vessel 25 and the compressor main body vessel 10. This allows welding to be performed by moving the position of the welding torch in one direction in the vertical direction of the compressor main body vessel 10 and the accumulator vessel 25 without moving the compressor main body vessel 10 and the accumulator vessel 25 in their circumferential directions, further improving welding workability. In addition, piping components such as the first connecting pipe 104T and the second connecting pipe 104S can be arranged together in the portion of the compressor main body vessel 10 and the accumulator vessel 25 that extends along the straight line L in the circumferential direction. Therefore, when a sound-insulating material (not shown) is wrapped around the outer circumferential surfaces of the compressor main body vessel 10 and the accumulator vessel 25 in the circumferential direction, both ends of the sound-insulating material in the circumferential direction can be aligned and fixed to the portion that extends along the straight line L. Therefore, even in a structure in which the first connecting pipe 104T, the second connecting pipe 104S, etc. are arranged along the outer peripheral surfaces of the compressor main body container 10 and the accumulator container 25, the workability of winding the sound-insulating material is not reduced.

[0057] Furthermore, in the rotary compressor 1 of the first embodiment, when viewed from the top-bottom direction of the accumulator shell 26, the first gas-liquid separation pipe 31T is bent in one direction from the position of the first through hole 28b, and the second gas-liquid separation pipe 31S is bent in the opposite direction from the position of the second through hole 28c inside the accumulator shell 26. This makes it possible to realize, in the shortest distance, a shape in which the first gas-liquid separation pipe 31T and the second gas-liquid separation pipe 31S extend parallel to each other at a predetermined height along the bottom surface inside the accumulator shell 26 from the first through hole 28b and the second through hole 28c, which are aligned in the top-bottom direction.

[0058] Other embodiments will be described below with reference to the drawings. In the other embodiments, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the description thereof will be omitted. [Example]

[0059] Fig. 8 is a perspective view showing a main part of a rotary compressor of Example 2. Fig. 9 is a side view showing a main part of a rotary compressor of Example 2. Example 2 differs from Example 1 in the positions of the first through hole 28b and the second through hole 28c and the connection structure of the first connecting pipe 104T and the second connecting pipe 104S.

[0060] 8 and 9, in the second embodiment, the first through-hole 28b through which the first gas-liquid separation pipe 31T connected to the first connecting pipe 104T penetrates the accumulator shell 26, and the second through-hole 28c through which the second gas-liquid separation pipe 31S connected to the second connecting pipe 104S penetrates the accumulator shell 26 are arranged side by side in the up-down direction of the accumulator shell 26. In the second embodiment, the first through-hole 28b through which the first gas-liquid separation pipe 31T penetrates the accumulator shell 26 is arranged above the second through-hole 28c through which the second gas-liquid separation pipe 31S penetrates the accumulator shell 26 in the up-down direction of the accumulator shell 26. In addition, the upper compression section suction pipe 102T and the lower compression section suction pipe 102S are arranged side by side in the up-down direction of the compressor main body container 10. The upper compression section suction pipe 102T is disposed above the lower compression section suction pipe 102S in the up-down direction of the compressor main body container 10.

[0061] In Example 2, the positions of the first through holes 28b and the second through holes 28c are upside down compared to the positions of the first through holes 28b and the second through holes 28c in Example 1. Therefore, although not shown, the first gas-liquid separation pipe 31T in Example 2 is formed in the same shape as the second gas-liquid separation pipe 31S in Example 1 (FIGS. 5 to 7). Similarly, the second gas-liquid separation pipe 31S in Example 2 is formed in the same shape as the first gas-liquid separation pipe 31T in Example 1 (FIGS. 5 to 7).

[0062] 9, the first through hole 28b and the second through hole 28c are arranged so as to be offset in the circumferential direction of the accumulator container 25 with respect to the upper compression section suction pipe 102T and the lower compression section suction pipe 102S. In other words, when viewed from the top-bottom direction (e.g., vertically above) of the compressor main body container 10, the first through hole 28b and the second through hole 28c are arranged so as not to overlap with the upper compression section suction pipe 102T and the lower compression section suction pipe 102S. Furthermore, in the circumferential direction of the compressor main body container 10 and the accumulator container 25, the positions of the first through hole 28b and the second through hole 28c and the positions of the upper compression section suction pipe 102T and the lower compression section suction pipe 102S are adjacent to each other. Therefore, the first communication pipe 104T has an upper end 104Tb connected to the upper compression section suction pipe 102T and a lower end 104Ta connected to one end 31Ta of the first gas-liquid separation pipe 31T, so that the direction in which the first communication pipe 104T extends along the outer peripheral surfaces of the compressor main body vessel 10 and the accumulator vessel 25 is inclined with respect to the up-down direction of the compressor main body vessel 10 and the accumulator vessel 25. The second communication pipe 104S has an upper end 104Sb connected to the lower compression section suction pipe 102S and a lower end 104Sa connected to one end 31Sa of the second gas-liquid separation pipe 31S, so that the direction in which the second communication pipe 104S extends along the outer peripheral surfaces of the compressor main body vessel 10 and the accumulator vessel 25 is inclined with respect to the up-down direction of the compressor main body vessel 10 and the accumulator vessel 25.

[0063] Furthermore, when viewed from the radial direction of the compressor main body vessel 10 and the accumulator vessel 25, the first connecting pipe 104T and the second connecting pipe 104S are arranged adjacent to each other along the outer peripheral surfaces of the compressor main body vessel 10 and the accumulator vessel 25. Therefore, both circumferential ends of the sound-insulating material (not shown) wound around the outer peripheral surfaces of the compressor main body vessel 10 and the accumulator vessel 25 can be aligned and fixed to the first connecting pipe 104T and the second connecting pipe 104S, thereby preventing a decrease in workability when winding the sound-insulating material. Furthermore, when viewed from the radial direction of the compressor main body vessel 10 and the accumulator vessel 25, the first connecting pipe 104T and the second connecting pipe 104S are arranged so as not to overlap each other. Therefore, it is possible to reduce the amount of protrusion of the first connecting pipe 104T and the second connecting pipe 104S from the radial direction of the compressor main body vessel 10 and the accumulator vessel 25, allowing the rotary compressor 1 to be made compact. 9, the first connecting pipe 104T and the second connecting pipe 104S can be formed to have the same length, and piping members having the same dimensions can be used for the first connecting pipe 104T and the second connecting pipe 104S. Therefore, the first connecting pipe 104T and the second connecting pipe 104S can be made of the same material, which reduces the manufacturing cost of the rotary compressor 1.

[0064] (Effects of Example 2) In the second embodiment, as in the first embodiment, the upper compression section suction pipe 102T and the lower compression section suction pipe 102S are arranged side by side in the up-down direction of the compressor main body vessel 10, and the first through hole 28b through which the first gas-liquid separation pipe 31T penetrates the accumulator shell 26 and the second through hole 28c through which the second gas-liquid separation pipe 31S penetrates the accumulator shell 26 are arranged side by side in the up-down direction of the accumulator vessel 25. Therefore, during welding, the position of the welding torch that forms the welded portions of the piping members is moved in one direction in the up-down direction of the compressor main body vessel 10 and the accumulator vessel 25, and movement of the compressor main body vessel 10 and the accumulator vessel 25 in the circumferential direction is suppressed, thereby improving the efficiency of welding and shortening the working time.

[0065] In addition, in the second embodiment, the first connecting pipe 104T and the second connecting pipe 104S are arranged so as not to overlap each other when viewed in the radial direction of the compressor main body vessel 10 and the accumulator vessel 25. This reduces the amount of protrusion of the first connecting pipe 104T and the second connecting pipe 104S relative to the radial direction of the compressor main body vessel 10 and the accumulator vessel 25, thereby making the rotary compressor 1 compact. Furthermore, the first connecting pipe 104T and the second connecting pipe 104S are arranged adjacent to each other along the outer circumferential surfaces of the compressor main body vessel 10 and the accumulator vessel 25 when viewed in the radial direction of the compressor main body vessel 10 and the accumulator vessel 25. This allows both circumferential ends of a sound-insulating material (not shown) wound around the outer circumferential surfaces of the compressor main body vessel 10 and the accumulator vessel 25 to be aligned and fixed to the first connecting pipe 104T and the second connecting pipe 104S, thereby preventing a decrease in the workability of winding the sound-insulating material.

[0066] Additionally, according to the second embodiment, the upper compression section suction pipe 102T is disposed higher than the lower compression section suction pipe 102S in the up-down direction of the compressor main body container 10, and the first through hole 28b, through which the first gas-liquid separation pipe 31T penetrates the accumulator shell 26, is disposed higher than the second through hole 28c, through which the second gas-liquid separation pipe 31S penetrates the accumulator shell 26, in the up-down direction of the accumulator container 25. This makes it possible to form the first connecting pipe 104T and the second connecting pipe 104S with the same length, and allows piping members with the same dimensions to be used as the first connecting pipe 104T and the second connecting pipe 104S, thereby reducing the manufacturing cost of the rotary compressor 1. [Example]

[0067] 10 is a side view showing a main part of a rotary compressor of Example 3. Example 3 differs from Examples 1 and 2 in the connection structure of the first connecting pipe 104T and the second connecting pipe 104S.

[0068] 10 , in the third embodiment, the first through hole 28b, the second through hole 28c, the upper compression section suction pipe 102T, and the lower compression section suction pipe 102S are arranged on a straight line L, and the first through hole 28b, through which the first gas-liquid separation pipe 31T penetrates the accumulator shell 26, is arranged above the second through hole 28c, through which the second gas-liquid separation pipe 31S penetrates the accumulator shell 26. This makes it possible to form the first connecting pipe 104T and the second connecting pipe 104S with the same lengths, and by using piping members having common dimensions for the first connecting pipe 104T and the second connecting pipe 104S, that is, piping members having the same dimensions including the inner diameter, outer diameter, and length, the manufacturing cost of the rotary compressor 1 can be reduced.

[0069] Furthermore, in the third embodiment, the entire first connecting pipe 104T is bent with respect to the straight line L toward one side in the circumferential direction of the compressor main body vessel 10 and the accumulator vessel 25, and the entire second connecting pipe 104S is bent with respect to the straight line L toward the opposite side from the one side in the circumferential direction of the compressor main body vessel 10 and the accumulator vessel 25. By bending the first connecting pipe 104T and the second connecting pipe 104S in this manner, it is possible to reduce the amount of protrusion of the first connecting pipe 104T and the second connecting pipe 104S in the radial direction of the compressor main body vessel 10 and the accumulator vessel 25, thereby making the rotary compressor 1 more compact. Furthermore, by inverting the first connecting pipe 104T and using the first connecting pipe 104T as the second connecting pipe 104S, the first connecting pipe 104T and the second connecting pipe 104S can be made common, thereby reducing the manufacturing cost of the rotary compressor 1.

[0070] (Effects of Example 3) In Example 3, as in Example 1, when welding the upper compression section suction pipe 102T, the lower compression section suction pipe 102S, the first gas-liquid separation pipe 31T, the second gas-liquid separation pipe 31S, the first connecting pipe 104T, and the second connecting pipe 104S to the compressor main body container 10 and the accumulator container 25, welding can be performed by moving the position of the welding torch in one direction in the vertical direction of the compressor main body container 10 and the accumulator container 25 without moving the compressor main body container 10 and the accumulator container 25 in their circumferential direction, thereby further improving the workability of welding. [Example]

[0071] 11 is a side view showing a main part of a rotary compressor of Example 4. Example 4 differs from Examples 1 to 3 in the connection structure of the first connecting pipe 104T and the second connecting pipe 104S.

[0072] As shown in Figure 11, in Example 4, the first through hole 28b and the second through hole 28c, the upper compression section suction pipe 102T, and the lower compression section suction pipe 102S are each arranged on a straight line L, and the second through hole 28c, through which the second gas-liquid separation pipe 31S penetrates the accumulator shell 26, is arranged above the first through hole 28b, through which the first gas-liquid separation pipe 31T penetrates the accumulator shell 26.

[0073] Furthermore, similar to the third embodiment, the entire first connecting pipe 104T in the fourth embodiment is bent toward one side of the circumferential direction of the compressor main body container 10 and the accumulator container 25 with respect to the straight line L, and the entire second connecting pipe 104S is bent toward the opposite side of the circumferential direction of the compressor main body container 10 and the accumulator container 25 with respect to the straight line L. By bending the first connecting pipe 104T and the second connecting pipe 104S in this manner, it is possible to reduce the amount of protrusion of each of the first connecting pipe 104T and the second connecting pipe 104S in the radial direction of the compressor main body container 10 and the accumulator container 25, and the rotary compressor 1 can be made compact.

[0074] (Effects of Example 4) In Example 4, as in Example 1, when welding the upper compression section suction pipe 102T, the lower compression section suction pipe 102S, the first gas-liquid separation pipe 31T, the second gas-liquid separation pipe 31S, the first connecting pipe 104T, and the second connecting pipe 104S to the compressor main body container 10 and the accumulator container 25, welding can be performed by moving the position of the welding torch in one direction in the vertical direction of the compressor main body container 10 and the accumulator container 25 without moving the compressor main body container 10 and the accumulator container 25 in their circumferential direction, thereby further improving the workability of welding. [Explanation of symbols]

[0075] 1. Rotary compressor (hermetic compressor) 10 Compressor main body container 10c bottom shell 11 Motor 12 Compression section 25 Accumulator vessel 26 Accumulator shell 26a Opening side 27 Accumulator suction pipe 28a Third through hole 28b 1st through hole 28c 2nd through hole 31T 1st gas-liquid separation tube 31Ta One end 31Tb other end 31S 2nd gas-liquid separation tube 31Sa One end 31Sb other end 101T Upper guide tube 101S Lower guide tube 102T Upper compression section intake pipe 102S Lower compression section intake pipe 104T First connecting pipe 104Tb top end 104Ta lower end 104S Second connecting pipe 104Sb top end 104Sa lower end 121T upper cylinder 121S Lower Cylinder 135T upper suction hole 135S lower suction hole

Claims

1. A vertical cylindrical compressor main body container contains a compression unit that compresses a refrigerant and discharges it into the compressor main body container, and a motor that drives the compression unit. In a hermetic compressor, an accumulator container is provided below the compressor main body container to separate a refrigerant into a gas refrigerant and a liquid refrigerant and supply the gas refrigerant to the compression section, the compression section has an upper cylinder and a lower cylinder, an upper compression section suction pipe connected to an upper suction hole of the upper cylinder, and a lower compression section suction pipe connected to a lower suction hole of the lower cylinder; The accumulator container has a first through hole and a second through hole formed therethrough, a first gas-liquid separation pipe that sends gas refrigerant from inside the accumulator container passes through the first through hole and is fixed to the first through hole by welding; a second gas-liquid separation pipe that sends gas refrigerant from inside the accumulator container passes through the second through hole and is fixed to the second through hole by welding; the first gas-liquid separation pipe is connected to the upper compression section suction pipe via a first connecting pipe outside the accumulator vessel, and the second gas-liquid separation pipe is connected to the lower compression section suction pipe via a second connecting pipe outside the accumulator vessel, the upper compression section suction pipe and the lower compression section suction pipe are arranged side by side in the up-down direction of the compressor main body container, a hermetic compressor, wherein the first through hole and the second through hole of the accumulator container are arranged side by side in the up-down direction of the accumulator container.

2. the first through hole, the second through hole, the upper compression section suction pipe, and the lower compression section suction pipe are arranged on a straight line along the up-down direction of the compressor main body container. The hermetic compressor according to claim 1 .

3. the first through hole is disposed higher than the second through hole in the up-down direction of the accumulator container, The first connecting pipe and the second connecting pipe have the same size. The hermetic compressor according to claim 1 or 2.

4. the first through hole and the second through hole are arranged so as not to overlap with the upper compression section suction pipe and the lower compression section suction pipe when viewed from the top-bottom direction of the compressor main body container. The hermetic compressor according to claim 1 .

5. When viewed from a radial direction of the compressor main body container and the accumulator container, the first communication pipe and the second communication pipe are arranged so as not to overlap each other.

5. The hermetic compressor according to claim 1.

6. an open end of the first gas-liquid separation pipe and an open end of the second gas-liquid separation pipe are located at the same height in the vertical direction of the accumulator container; 6. The hermetic compressor according to claim 1.

7. Within the accumulator vessel, the first gas-liquid separation pipe and the second gas-liquid separation pipe extend parallel to each other at a predetermined height along a bottom surface within the accumulator vessel and are bent upward. The hermetic compressor according to claim 6.

8. Inside the accumulator container, the first gas-liquid separation pipe is bent in one direction from the position of the first through hole when viewed in the vertical direction of the accumulator container, and the second gas-liquid separation pipe is bent in the opposite direction from the position of the second through hole when viewed in the vertical direction of the accumulator container. The hermetic compressor according to any one of claims 1 to 7.

Images