JP7782343B2 - Hermetic compressor - Google Patents

Description

The present invention relates to a hermetic compressor.

A known hermetic compressor is one that includes a vertical, cylindrical compressor main container that houses a compression section and a motor that drives the compression section, and an accumulator container that separates the refrigerant into gaseous and liquid refrigerant (hereinafter referred to as gas-liquid separation of the refrigerant) and draws only the gaseous refrigerant into the compression section.

Japanese Patent Application Laid-Open No. 2020-109283 JP 2010-150973 A

In the compressor of Patent Document 1, the accumulator container, which separates the gas and liquid refrigerant drawn into the compression section, is located below the compressor main container. This prevents the hermetic compressor from becoming larger when equipped with an accumulator container, compared to when the accumulator container is located on the outer periphery of the side of the compressor main container.

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 inside the accumulator container to the compression section inside the compressor main container are fixed through through holes formed in the side wall of the accumulator container and through through holes formed in the side of the compressor main container.

The compressor in 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. Furthermore, in the compressor in Patent Document 2, the 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.

Here, in a hermetic compressor in which an accumulator container is placed below the compressor main container, as described in Patent Document 1, if 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 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 the respective through-holes by welding or brazing.

However, in this case, the number of welds required to connect the piping components that form the two suction paths to the compressor main body container and the accumulator container increases, resulting in a problem of reduced work efficiency during the welding process.

The disclosed technology was developed in light of the above, and aims to provide a hermetic compressor with an accumulator container located below the compressor main body container, which can improve work efficiency when welding the piping components that form the refrigerant suction path.

One aspect of the hermetic compressor disclosed herein is a vertically cylindrical compressor main container that houses a compression unit that compresses 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 gaseous and liquid refrigerant and supplying the gaseous refrigerant to the compression unit. The compression unit has an upper cylinder and a lower cylinder, with the upper compression unit suction pipe connected to the upper suction hole of the upper cylinder and the lower compression unit suction pipe connected to the 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 gaseous refrigerant from inside the accumulator container penetrates the first through hole of the accumulator container and is fixed to the first through hole by welding. A second gas-liquid separation pipe, which sends gas refrigerant from inside the accumulator container, passes through a second through-hole in the accumulator container and is fixed by welding 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 container. The first through-hole and the second through-hole in the accumulator container are arranged side by side in the vertical direction of the accumulator container.

According to one aspect of the hermetic compressor disclosed in this application, in a structure in which an accumulator container is disposed below the compressor main body container, work efficiency can be improved when welding the piping components that form the refrigerant suction path.

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

Below, examples of hermetic compressors disclosed in the present application are described in detail with reference to the drawings. Note that the hermetic compressors disclosed in the present application are not limited to the following examples.

(Configuration of 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.

As shown in Figure 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 container 10, as well as a motor 11 that drives the compression section 12.The high-pressure refrigerant compressed in the compression section 12 is discharged into the compressor main body container 10 and further discharged into the refrigeration cycle through a discharge pipe 107.

As shown in Figures 1, 3, and 4, the compressor main container 10 has a vertical cylindrical main shell 10a, a cup-shaped top shell 10b, and a cup-shaped bottom shell 10c. The compressor main container 10 is constructed by welding the opening side 10g of the top shell 10b to the upper end of the main shell 10a, and welding the opening side 10d of the bottom shell 10c to the lower end of the main shell 10a.

An upper compression section suction pipe 102T and a lower compression section suction pipe 102S are provided through the main shell 10a to draw low-pressure refrigerant from the refrigeration cycle into the compression section 12. Specifically, the upper guide pipe 101T is brazed to the main shell 10a, and the upper compression section suction pipe 102T is secured 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, the lower guide pipe 101S is brazed to the main shell 10a, and the lower compression section suction pipe 102S is secured 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.

A discharge pipe 107 penetrates the top shell 10b to discharge the high-pressure refrigerant compressed in the compression section 12 from inside the compressor main body vessel 10 to the refrigeration cycle. The discharge pipe 107 is fixed by brazing directly to the top shell 10b.

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

The accumulator shell 26 has 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. The first gas-liquid separation pipe 31T, which transports 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, the second gas-liquid separation pipe 31S, which transports 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, the 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.

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.

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

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, upper cylinder 121T, intermediate partition plate 140, lower cylinder 121S, and lower end plate 160S are stacked in this order and fixed with a plurality of bolts 175 and auxiliary bolts 176. A main bearing portion 161T is provided on the upper end plate 160T. A sub-bearing portion 161S is provided on the lower end plate 160S. The rotating shaft 15 has 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 engaged with the main bearing portion 161T of the upper end plate 160T, and the sub-shaft portion 151 of the rotating shaft 15 is engaged with the sub-bearing portion 161S of the lower end plate 160S, thereby supporting the rotating shaft 15 so that it can rotate freely.

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

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 seal between the high-pressure and low-pressure sections within the compression chamber.

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) formed therein, and an upper piston 125T is disposed in the upper hollow section 130T. The upper piston 125T is engaged with the upper eccentric section 152T of the rotating shaft 15. The lower cylinder 121S has a cylindrical lower hollow section 130S (lower cylinder chamber) formed therein, and a lower piston 125S is disposed in the lower hollow section 130S. The lower piston 125S is engaged with the lower eccentric section 152S of the rotating shaft 15.

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

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

The upper end plate 160T has an upper discharge hole 190T that passes through 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 prevents the upper discharge valve 200T from warping 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 positioned 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 multiple bolts 175 that secure the upper end plate 160T to the upper cylinder 121T. The upper end plate cover 170T has an upper end plate cover discharge hole 172 that connects the upper end plate cover chamber 180T to the interior of the compressor main body container 10.

The lower end plate 160S has 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 prevents the lower discharge valve 200S from warping 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 positioned below the lower end plate 160S, forming a lower end plate cover chamber 180S that is closed 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 with multiple bolts 175 that also secure the lower end plate 160S to the lower cylinder 121S.

The compression section 12 also has a refrigerant passage hole 136 (see Figure 2) that penetrates the lower end plate 160S, lower cylinder 121S, intermediate partition plate 140, upper end plate 160T, and upper cylinder 121T and connects the lower end plate cover chamber 180S and the upper end plate cover chamber 180T.

The flow of refrigerant caused by the rotation of the rotary shaft 15 is explained below. As the rotary shaft 15 rotates, the upper piston 125T and lower piston 125S, fitted to the upper eccentric portion 152T and lower eccentric portion 152S of the rotary shaft 15, revolve, causing the upper suction chamber 131T and 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 at the bottom, and only the gaseous refrigerant is drawn into the first gas-liquid separation pipe 31T and second gas-liquid separation pipe 31S, which open upward inside the accumulator container 25. The gas 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.

If 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 tube 31T and the second gas-liquid separation tube 31S, causing a large amount of liquid refrigerant to flow into the first gas-liquid separation tube 31T and the second gas-liquid separation tube 31S. If a large amount of liquid refrigerant flows into the compression section 12 through the first gas-liquid separation tube 31T and the second gas-liquid separation tube 31S, it may damage the compression section 12. To prevent a large amount of liquid refrigerant from flowing into the first gas-liquid separation tube 31T and the second gas-liquid separation tube 31S, the first gas-liquid separation tube 31T and the second gas-liquid separation tube 31S are provided with liquid return holes 34 for drawing liquid refrigerant into the gas-liquid separation tube 31 little by little.

Next, we will explain the flow of refrigerant discharged by rotation of the rotating shaft 15. As the rotating shaft 15 rotates, the upper piston 125T fitted to the upper eccentric portion 152T of the rotating shaft 15 revolves, causing the upper discharge chamber 133T to compress the refrigerant while reducing its volume. When the pressure of the compressed refrigerant exceeds 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.

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 as the lower discharge chamber 133S reduces its volume. When the pressure of the compressed refrigerant exceeds the pressure in the lower end plate cover chamber 180S outside the lower discharge valve 200S, the lower discharge valve 200S opens, discharging 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 through the upper end plate cover discharge hole 172T provided in the upper end plate cover 170T.

The refrigerant discharged into the compressor main body vessel 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 through a gap in the winding section of the stator 111 (not shown), or through the gap 115 between the stator 111 and the rotor 112 (see Figure 1), and is then discharged from the discharge pipe 107 located at the top of the compressor main body vessel 10.

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

(Characteristic configuration of rotary compressor)
Next, a description will be given of the characteristic configuration of the rotary compressor 1 of Example 1. The characteristics of Example 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.

Figure 5 is a perspective view showing the interior of the accumulator container 25 in Example 1. Figure 6 is a plan view showing the interior of the accumulator container 25 in Example 1. Figure 7 is a side view showing the interior of the accumulator container 25 in Example 1. Note that in Figure 1, for ease of illustration, the position of the accumulator suction pipe 27 (described below) is shifted circumferentially around the accumulator shell 26, but this does not limit the position of the accumulator suction pipe 27.

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 Figure 1). The accumulator vessel 25 is sealed with the inner peripheral surface of the accumulator shell 26 in contact with 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, gas leakage from the weld can be easily confirmed. For example, after filling the accumulator container 25 (accumulator shell 26) with a test gas (such as nitrogen), the piping connecting the inside of the accumulator container 25 to the outside (such as the accumulator suction pipe 27) is sealed, and the accumulator container 25 integrated with the compressor main body container 10 is submerged in water. Checking for gas leaks from the welds facing the outside of the rotary compressor 1 allows inspection of whether the accumulator container 25 is airtight (whether there are any welding defects). This makes it easy to inspect the airtightness of the accumulator shell 26, making it easier to ensure reliable sealing.

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

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 interior of the accumulator shell 26. The first gas-liquid separation pipe 31T extends radially from the position of the first through-hole 28b along the accumulator shell 26 and bends downward, then extends along the bottom surface of the interior of the accumulator shell 26 and the other end 31Tb bends upward within the 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. This allows the lubricating oil 18 that has accumulated in the lower part of the accumulator container 25 to be effectively returned to the interior of the compressor main container 10 via the first gas-liquid separation pipe 31T, along 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. This allows the lubricating oil 18 that has accumulated in the lower part of the accumulator container 25 to be effectively returned to the inside of the compressor main body container 10 via the second gas-liquid separation pipe 31S, along with a small amount of liquid refrigerant. Furthermore, 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.

In other words, 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 come into contact with each other. Furthermore, in the vertical direction of the accumulator shell 26, 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. This prevents a large amount of liquid refrigerant from flowing into the gas-liquid separation pipe with the lower opening end of the two gas-liquid separation pipes 31T, 31S.

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 vertical 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 interior of 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 to the inside of the compressor main body container 10 from the two gas-liquid separation pipes, the first gas-liquid separation pipe 31T and the second gas-liquid separation pipe 31S. 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 prevents the liquid refrigerant that flows into the accumulator container 25 from the accumulator suction pipe 27 from flowing directly into the first gas-liquid separation pipe 31T or the second gas-liquid separation pipe 31S.

As shown in FIG. 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.

One end 27a of the accumulator suction pipe 27 penetrates the side wall of the accumulator shell 26 and extends into the interior of the accumulator shell 26. The end 27a that penetrates the side wall of the accumulator shell 26 is fixed by welding to a third through hole 28a in the accumulator shell 26. 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 Figures 3 and 6, the third through hole 28a of the accumulator suction pipe 27 is positioned adjacent to the first through hole 28b of the first gas-liquid separation pipe 31T in the circumferential direction of the accumulator shell 26.

In this way, the accumulator suction pipe 27 and the first and second gas-liquid separation pipes 31T and 31S are arranged together in one location in the circumferential direction of the accumulator shell 26, as shown in FIG. 3. This allows the accumulator suction pipe 27 and the first and second connecting pipes 104T and 104S to be arranged together in the circumferential direction of the accumulator shell 26, resulting in 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 in a separate location on the opposite side of the accumulator shell 26 from where the first and second connecting pipes 104T and 104S are located, as shown in FIG. 1.

As shown in Figures 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.

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 vertical direction of the accumulator shell 26, as shown in Figures 3 and 4. In Example 1, as shown in Figures 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 vertical 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 vertical direction of the compressor main body container 10. The upper compression section suction pipe 102T is positioned higher than the lower compression section suction pipe 102S in the vertical direction of the compressor main body container 10.

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 vertically through the accumulator container 25 and the compressor main body container 10. Here, "the respective through holes (28b, 28c) and the respective compression section suction pipes (102T, 102S) are arranged on a straight line L that extends vertically" means that when the respective through holes and the respective compression section suction pipes are viewed from the radial direction of the compressor main body container 10 and the accumulator container 25, at least a portion of each of the respective through holes and the respective compression section suction pipes overlaps with the straight line L. With this arrangement, when welding the piping components that form the suction path that sends refrigerant from the accumulator vessel 25 to the compression section 12 -- 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 vessel 10 and the accumulator vessel 25, the position of the welding torch that forms the weld can be moved in one direction in the vertical direction of the compressor vessel 10 and the accumulator vessel 25, and welding can be performed without moving the compressor vessel 10 and the accumulator vessel 25 in the circumferential direction, improving welding workability and shortening welding time.

As shown in Figures 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 container 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 container 10 and a lower compression section suction pipe 102S fitted inside the lower guide pipe 101S.

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 the desired lengths, the lengths of the first and second suction passages can be easily adjusted to achieve the optimal supercharging effect. This embodiment thereby achieves 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 as the volume of the hollow cylinder (cylinder chamber) in the compression section changes. 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 within the suction passage when the compressor is operated at a predetermined rotational speed.

In addition, a second connecting pipe 104S is arranged between the first connecting pipe 104T and the outer peripheral surfaces of the compressor main body container 10 and the accumulator container 25. Therefore, 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 Figure 4), the second connecting pipe 104S is arranged 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 components such as the first connecting pipe 104T and the second connecting pipe 104S are grouped together 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 arranged. Therefore, when winding sound-insulating material (sound-absorbing material) (not shown) around the outer periphery of the compressor main vessel 10 and the accumulator vessel 25 to reduce noise generated by the compressor main vessel, it is possible to align and secure both ends of the sound-insulating material in the circumferential direction of the outer periphery along the line L. Specifically, by forming notches at both ends of the sound-insulating material where they contact the respective piping components, it is possible to easily wind both ends of the sound-insulating material in alignment with the respective piping components. Therefore, even in a structure in which the first connecting pipe 104T, second connecting pipe 104S, etc. are arranged along the outer periphery of the compressor main vessel 10 and the accumulator vessel 25, the ease of winding the sound-insulating material is minimized.

The interior of the accumulator shell 26 may also 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.

(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, thereby preventing the compressor main body container 10 and the accumulator container 25 from moving in their circumferential direction, thereby improving welding workability and shortening welding time.

Furthermore, in the rotary compressor 1 of Example 1, 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 runs along the vertical direction of the accumulator container 25 and the compressor main body container 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 container 10 and the accumulator container 25 without moving the compressor main body container 10 and the accumulator container 25 in their circumferential direction, 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 container 10 and the accumulator container 25 that runs along the straight line L in the circumferential direction. Therefore, when winding sound-proofing material (not shown) around the outer periphery of the compressor main body container 10 and the accumulator container 25, it is possible to align and fix both ends of the sound-proofing material in the circumferential direction with the portions along the straight line L. Therefore, even in a structure in which the first connecting pipe 104T, second connecting pipe 104S, etc. are arranged along the outer periphery of the compressor main body container 10 and the accumulator container 25, the ease of winding the sound-proofing material is minimized.

Furthermore, in the rotary compressor 1 of Example 1, 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, and the second gas-liquid separation pipe 31S is bent in the opposite direction from the position of the second through hole 28c. This allows the first gas-liquid separation pipe 31T and the second gas-liquid separation pipe 31S to 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 the second through hole 28c, which are aligned in the vertical direction, in the shortest distance.

Other embodiments will be described below with reference to the drawings. In these embodiments, components that are the same as those in Example 1 will be assigned the same reference numerals as in Example 1, and descriptions thereof will be omitted.

Figure 8 is a perspective view showing the main parts of a rotary compressor of Example 2. Figure 9 is a side view showing the main parts 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.

8 and 9, in Example 2, the first through-hole 28b through which the first gas-liquid separation pipe 31T connected to the first connecting pipe 104T passes through 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 passes through the accumulator shell 26 are arranged side by side in the vertical direction of the accumulator shell 26. In Example 2, in the vertical direction of the accumulator shell 26, the first through-hole 28b through which the first gas-liquid separation pipe 31T passes through the accumulator shell 26 is arranged above the second through-hole 28c through which the second gas-liquid separation pipe 31S passes through 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 vertical direction of the compressor main body container 10. The upper compression section suction pipe 102T is positioned higher than the lower compression section suction pipe 102S in the vertical direction of the compressor main body container 10.

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. For this reason, 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 (Figures 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 (Figures 5 to 7).

As shown in Figure 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 relative to the upper compression section suction pipe 102T and the lower compression section suction pipe 102S. In other words, when viewed from the top-to-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 are adjacent to the positions of the upper compression section suction pipe 102T and the lower compression section suction pipe 102S. Therefore, the first connecting pipe 104T has its upper end 104Tb connected to the upper compression section suction pipe 102T and its lower end 104Ta connected to one end 31Ta of the first gas-liquid separation pipe 31T, so that the direction in which the first connecting pipe 104T extends along the outer surfaces of the compressor main body vessel 10 and the accumulator vessel 25 is inclined relative to the vertical direction of the compressor main body vessel 10 and the accumulator vessel 25. The second connecting pipe 104S has its upper end 104Sb connected to the lower compression section suction pipe 102S and its lower end 104Sa connected to one end 31Sa of the second gas-liquid separation pipe 31S, so that the direction in which the second connecting pipe 104S extends along the outer surfaces of the compressor main body vessel 10 and the accumulator vessel 25 is inclined relative to the vertical direction of the compressor main body vessel 10 and the accumulator vessel 25.

Furthermore, when viewed radially from the compressor main body container 10 and the accumulator container 25, 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 container 10 and the accumulator container 25. Therefore, both circumferential ends of the sound-insulating material (not shown) wrapped around the outer circumferential surfaces of the compressor main body container 10 and the accumulator container 25 can be aligned and fixed to the first connecting pipe 104T and the second connecting pipe 104S, thereby minimizing the reduction in workability when wrapping the sound-insulating material. Furthermore, when viewed radially from the compressor main body container 10 and the accumulator container 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 minimize the amount of protrusion of the first connecting pipe 104T and the second connecting pipe 104S radially from the compressor main body container 10 and the accumulator container 25, thereby enabling the rotary compressor 1 to be made compact. Furthermore, in Example 2, as shown in FIG. 9, it is possible to form the first connecting pipe 104T and the second connecting pipe 104S to be the same length, and piping materials with common dimensions can be used for the first connecting pipe 104T and the second connecting pipe 104S. This allows the first connecting pipe 104T and the second connecting pipe 104S to be made of the same material, thereby reducing the manufacturing cost of the rotary compressor 1.

(Effects of Example 2)
In Example 2, as in Example 1, 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 passes through the accumulator shell 26, and the second through hole 28c, through which the second gas-liquid separation pipe 31S passes through 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 welds 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.

In addition, in Example 2, the first connecting pipe 104T and the second connecting pipe 104S are arranged so that they do not overlap each other when viewed radially from the compressor main body container 10 and the accumulator container 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 container 10 and the accumulator container 25, making it possible to make 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 container 10 and the accumulator container 25 when viewed radially from the compressor main body container 10 and the accumulator container 25. This allows both circumferential ends of the sound-insulating material (not shown) wrapped around the outer circumferential surfaces of the compressor main body container 10 and the accumulator container 25 to be aligned and fixed to the first connecting pipe 104T and the second connecting pipe 104S, thereby minimizing any degradation in workability when wrapping the sound-insulating material.

In addition, according to Example 2, the upper compression section suction pipe 102T is positioned higher than the lower compression section suction pipe 102S in the vertical direction of the compressor main body container 10, and the first through hole 28b through which the first gas-liquid separation pipe 31T passes through the accumulator shell 26 is positioned higher than the second through hole 28c through which the second gas-liquid separation pipe 31S passes through the accumulator shell 26 in the vertical 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 components with the same dimensions to be used for the first connecting pipe 104T and the second connecting pipe 104S, thereby reducing the manufacturing cost of the rotary compressor 1.

Figure 10 is a side view showing the main parts 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.

As shown in FIG. 10 , in Example 3, 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 passes through the accumulator shell 26, is arranged above the second through hole 28c, through which the second gas-liquid separation pipe 31S passes through 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 components with common dimensions for the first connecting pipe 104T and the second connecting pipe 104S, i.e., the same dimensions including the inner diameter, outer diameter, and length, the manufacturing costs of the rotary compressor 1 can be reduced.

In addition, in Example 3, the entire first connecting pipe 104T is bent relative to the line L toward one side in the circumferential direction of the compressor main body vessel 10 and the accumulator vessel 25, while the entire second connecting pipe 104S is bent relative to the line L toward the opposite side of 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 it 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 costs of the rotary compressor 1.

(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.

Figure 11 is a side view showing the main parts of a rotary compressor according to 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.

As shown in Figure 11, in Example 4, 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 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.

Furthermore, as in Example 3, the entire first connecting pipe 104T in Example 4 is bent relative to the straight line L toward one side in the circumferential direction of the compressor main body container 10 and the accumulator container 25, and the entire second connecting pipe 104S is bent relative to the straight line L toward the opposite side from the one side in the circumferential direction of the compressor main body container 10 and the accumulator container 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 container 10 and the accumulator container 25, allowing the rotary compressor 1 to be made more compact.

(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.

1. Rotary compressor (hermetic compressor)
DESCRIPTION OF SYMBOLS 10 Compressor main body container 10c Bottom shell 11 Motor 12 Compression section 25 Accumulator container 26 Accumulator shell 26a Opening side 27 Accumulator suction pipe 28a Third through hole 28b First through hole 28c Second through hole 31T First gas-liquid separation pipe 31Ta One end 31Tb Other end 31S Second gas-liquid separation pipe 31Sa One end 31Sb Other end 101T Upper guide pipe 101S Lower guide pipe 102T Upper compression section suction pipe 102S Lower compression section suction pipe 104T First connecting pipe 104Tb Upper end 104Ta Lower end 104S Second connecting pipe 104Sb Upper end 104Sa Lower end 121T Upper cylinder 121S Lower cylinder 135T Upper suction hole 135S Lower suction hole

Claims (8)

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. 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 . 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 dimensions.
The hermetic compressor according to claim 1 or 2. 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 . 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. 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. 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. 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.