Hermetic compressor

Abstract

A compressor body container (10) has a vertical cylindrical main shell (10a), a cup-shaped top shell (10b), and a cup-shaped bottom shell (10c), and the interior of the main shell (10a) is sealed by fixing the open side of the top shell (10b) to the upper end portion of the main shell (10a) by welding at a first welding portion (V), and fixing the open side (10d) of the bottom shell (10c) to the lower end portion of the main shell (10a) by welding at a second welding portion (W). An accumulator container (25) has a cup-shaped accumulator shell (26), and the interior of the accumulator shell (26) is sealed by welding the open side (26a) of the accumulator shell (26) to the opening opposing side (10e) of the bottom shell (10c) at a third welding portion (X) below the position of the second welding portion (W) of the compressor body container (10).

Description

Technical Field

[0001] The present invention relates to a hermetic compressor that compresses and conveys a refrigerant in a refrigerator or an air conditioner using a refrigeration cycle.

Background Art

[0002] As a hermetic compressor, a compression part and a motor for driving the compression part are housed inside a vertical cylindrical compressor body container, and at the lower part of the compressor body container, the refrigerant is separated into a gaseous refrigerant and a liquid refrigerant (hereinafter referred to as gas-liquid separation of the refrigerant), and an accumulator container for sucking only the gaseous refrigerant into the compression part is provided. A known compressor is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] The compressor of Patent Document 1 has a rotary compressor as the compression part, and an accumulator container for separating the gas-liquid of the refrigerant sucked into the compression part is composed of a container independent of the compressor body container and is disposed below the compressor body container. The compressor body container and the accumulator container are connected using a bracket. In the configuration of Patent Document 1, since the compressor body container and the accumulator container are configured as independent containers, there are problems of increased container cost and increased cost due to the use of a bracket for connecting the compressor body container and the accumulator container.

[0005] The compressor in Patent Document 2 has a scroll-type compression section, and an accumulator container is directly joined to the lower part of the compressor main body container that houses the compression section and the motor that drives the compression section. Specifically, in the first embodiment of Patent Document 2, the compressor main body container is composed of a vertical cylindrical main shell, a cup-shaped top shell that closes the upper end of the main shell, and a cup-shaped bottom shell that closes the lower end of the main shell. The accumulator container forms an accumulator container with a space sealed by the bottom shell and the accumulator shell by fixing the opening side of the cup-shaped accumulator shell to the lower side of the bottom shell by welding. That is, the bottom shell serves as a part of the compressor main body container and a part of the accumulator container. A compression section suction pipe penetrating the bottom shell is provided on the bottom shell, and the refrigerant inside the accumulator container is sucked into the compression section through the compression section suction pipe.

[0006] In the above configuration, the main shell and the accumulator shell are fixed to the bottom shell by welding at one welding part common to both. Generally, for a hermetic compressor for an air conditioner, in order to inspect for the presence or absence of poor welding of the shell that constitutes the hermetic container, high-pressure gas is sealed inside before shipment, and the presence or absence of leakage to the outside is confirmed in a water tank.

[0007] When there is a defect in a common welding part where the main shell and the accumulator shell are fixed by welding to the bottom shell of the first embodiment of Patent Document 2, the refrigerant gas leakage path will be described. Depending on the pattern of the defect in the welding part, the refrigerant gas leakage path may be any one of three paths: the first path is the leakage of refrigerant gas from the inside to the outside of the compressor main body container; the second path is the leakage of refrigerant gas from the inside to the outside of the accumulator container; the third path is the leakage of refrigerant gas from the inside of the compressor main body container to the inside of the accumulator container, or there may be a pattern in which two or more of the three paths are combined. Welding defects that cause refrigerant gas leakage from the inside of the compressor main body container to the outside, which is the first path, or from the inside of the accumulator container to the outside, which is the second path, can be detected by the method of enclosing the high-pressure gas and checking for external leakage in a water tank. However, welding defects that cause refrigerant gas leakage from the inside of the compressor main body container to the inside of the accumulator container, which is the third path, cannot be detected by this method. There is a problem that when the compressor is operating, the high-pressure refrigerant inside the compressor main body container leaks into the low-pressure accumulator container, leading to a decrease in efficiency and reliability.

[0008] The compressor of Patent Document 3 divides the inside of the sealed container with a pressure partition wall. The upper part of the pressure partition wall is the compressor main body container where the compression part and the motor are housed, and the lower part of the pressure partition wall is the accumulator container. Even in the configuration of Patent Document 3, it is difficult to detect defects in the welded part between the inner peripheral surface of the sealed container and the pressure partition wall by the inspection method described in Patent Document 2. There is a problem that the high-pressure refrigerant inside the compressor main body container leaks into the low-pressure accumulator container, leading to a decrease in efficiency and reliability.

[0009] The disclosed technology has been made in view of the above, and in a compressor in which an accumulator container is arranged below the compressor main body container, it aims to suppress the manufacturing cost of the compressor, prevent refrigerant leakage from the compressor main body container to the accumulator container, and provide a highly reliable hermetic compressor.

Means for Solving the Problem

[0010] One aspect of the hermetic compressor disclosed in the present application includes a compression section that sucks refrigerant from a suction pipe passing through a container inside a compression section main body container, compresses the refrigerant, and discharges the compressed refrigerant into the compression section main body container, and a motor that drives the compression section. The compressor main body container has a vertical cylindrical main shell, a cup-shaped top shell, and a cup-shaped bottom shell. The opening side of the top shell is fixed to the upper end of the main shell by welding at a first welded portion, and the opening side of the bottom shell is fixed to the lower end of the main shell by welding at a second welded portion, thereby sealing the inside of the main shell. The accumulator container has a cup-shaped accumulator shell, and the opening side of the accumulator shell is fixed by welding at a third welded portion below the position of the second welded portion in the compressor main body container on the side opposite to the opening of the bottom shell (hereinafter referred to as the anti-opening side), thereby sealing the inside of the accumulator shell. The first welding part, the second welding part, and the third welding part are exposed outside the compressor main body container.

Advantages of the Invention

[0011] According to one aspect of the hermetic compressor disclosed in the present application, in a compressor in which an accumulator is disposed below a compressor main body container, it is possible to suppress the manufacturing cost of the compressor, prevent refrigerant leakage from the compressor main body container to the accumulator container, and provide a highly reliable hermetic compressor.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0013] Hereinafter, an embodiment of the compressor disclosed in the present application will be described in detail with reference to the drawings. Note that the compressor disclosed in the present application is not limited by the following embodiments.

Embodiment

[0014] (Configuration of Rotary Compressor) In this embodiment, as an example of the compressor, a rotary compressor will be described. FIG. 1 is a longitudinal sectional view showing the rotary compressor of the embodiment. FIG. 2 is an exploded perspective view showing the compression part of the rotary compressor of the embodiment.

[0015] As shown in FIG. 1, the rotary compressor 1 includes a compression part 12 that sucks refrigerant from the compression part suction pipe 102 inside the compressor main body container 10 and discharges the compressed refrigerant inside the compressor main body container 10, and a motor 11 that drives the compression part 12. It is an internal high-pressure type hermetic compressor that discharges the high-pressure refrigerant compressed by the compression part 12 inside the compressor main body container 10 and further discharges it to the refrigeration cycle through the discharge pipe 107.

[0016] The compressor main body container 10 has a vertical cylindrical main shell 10a, a cup-shaped top shell 10b, and a cup-shaped bottom shell 10c. The opening side 10g of the top shell 10b is fixed to the upper end of the main shell 10a by welding at the first welding part V, and the opening side 10d of the bottom shell 10c is fixed to the lower end of the main shell 10a by welding at the second welding part W.

[0017] A compression part suction pipe 102 for sucking the low-pressure refrigerant of the refrigeration cycle into the compression part 12 is provided through the main shell 10a. Specifically, a guide pipe 101 is fixed to the main shell 10a by brazing, and the compression part suction pipe 102 passes through the inside of the guide pipe 101 and is fixed to the guide pipe 101 by brazing.

[0018] In other words, the welded joint (seventh welded joint) joining the guide pipe 101 and the compressor main body container 10, the welded joint (eighth welded joint) joining the guide pipe 101 and the compression part suction pipe 102, and the welded joint (ninth welded joint) joining the compression part suction pipe 102 and the communication pipe 104 are provided outside the compressor main body container 10. Therefore, even if a welding defect occurs in the seventh, eighth, and ninth welded joints, it is possible to easily detect leakage of refrigerant gas from the outside of the compressor main body container 10, so that a highly reliable rotary compressor 1 can be provided.

[0019] A discharge pipe 107 for discharging the high-pressure refrigerant compressed by the compression part 12 from the inside of the compressor main body container 10 to the refrigeration cycle is provided penetrating the top shell 10b. The discharge pipe 107 is directly fixed to the top shell 10b by brazing.

[0020] Below the compressor main body container 10, an accumulator container 25 is provided for separating the gas-liquid of the low-pressure refrigerant sucked from the refrigeration cycle and sucking only the gaseous refrigerant into the compression part 12. Specifically, at a position below the second welded joint W between the main shell 10a and the bottom shell 10c in the compressor main body container 10, the opening side 26a of the accumulator shell 26 is fixed to the anti-opening side 10e of the bottom shell 10c by welding with a third welded joint X, and the inside of the accumulator shell 26 is sealed, thereby forming the accumulator container 25.

[0021] An accumulator suction pipe 27 for sucking refrigerant from the refrigeration cycle into the inside of the accumulator container 25 and a gas-liquid separation pipe 31 for sending gaseous refrigerant from inside the accumulator are respectively provided penetrating the accumulator shell 26 and fixed to the accumulator shell 26 by brazing.

[0022] The gas-liquid separation pipe 31 is connected to the compressor suction pipe 102 via the connecting pipe 104 outside the accumulator container 25. The end of the gas-liquid separation pipe 31 to which the connecting pipe 104 is connected is formed with an enlarged diameter so that one end of the connecting pipe 104 can be inserted. The end of the compressor suction pipe 102 to which the connecting pipe 104 is connected has an enlarged diameter so that the other end of the connecting pipe 104 can be inserted. Thereby, the gas-liquid separation pipe 31 and the connecting pipe 104 can be easily connected outside the accumulator container 25, and the compressor suction pipe 102 and the connecting pipe 104 can be easily connected outside the compressor body container 10.

[0023] The connecting pipe 104 extends along the vertical direction of the compressor body container 10 and the accumulator container 25 and is connected to the gas-liquid separation pipe 31 and the compressor suction pipe 102. One end and the other end of the connecting pipe 104 are bent along the radial direction of the compressor body container 10 and the accumulator container 25. Thereby, the work in the process of connecting the connecting pipe 104 and the gas-liquid separation pipe 31 and the process of connecting the connecting pipe 104 and the compressor suction pipe 102 are facilitated, and each pipe of the gas-liquid separation pipe 31, the compressor suction pipe 102, and the connecting pipe 104 can be formed into a simple shape. As a result, an increase in the manufacturing cost of the rotary compressor 1 can be suppressed.

[0024] In addition, a welded portion (the fourth welded portion) that joins the gas-liquid separation pipe 31 and the accumulator container 25 (accumulator shell 26), a welded portion (the fifth welded portion) that joins the accumulator suction pipe 27 and the accumulator container 25, and a welded portion (the sixth welded portion) that joins the gas-liquid separation pipe 31 and the connecting pipe 104 are provided outside the accumulator container 25. Therefore, even when a welding defect occurs in the fourth, fifth, and sixth welded portions, it is possible to easily detect a leakage of the refrigerant gas from the outside of the compressor body container 10, so that a highly reliable rotary compressor 1 can be provided.

[0025] That is, since the welding parts (the fourth to ninth welding parts) of the accumulator suction pipe 27, the gas-liquid separation pipe 31, and the communication pipe 104, which are respectively connected to the rotary compressor 1, are provided outside the accumulator container 25 and the compressor main body container 10, it becomes possible to easily detect leakage of refrigerant gas from the fourth to ninth welding parts outside the rotary compressor 1, and welding defects of each welding part can be repaired to form appropriate welding parts.

[0026] At the lower part of the accumulator shell 26, a base member 310 that supports the entire rotary compressor 1 is fixed by welding. The accumulator shell 26 has a concave bottom surface that bulges downward. Also, inside the accumulator shell, the gas-liquid separation pipe 31 is bent along the bottom surface of the accumulator shell 26, and the gas-liquid separation pipe 31 is arranged close to the vicinity of the bottom surface of the accumulator shell 26.

[0027] Thereby, a liquid return hole 34 (to be described later) of the gas-liquid separation pipe 31 can be arranged close to the bottom of the accumulator shell 26 where liquid refrigerant accumulates. Thus, together with the liquid refrigerant accumulating at the bottom, lubricating oil 18 can be easily returned to the compression part 12 through the liquid return hole 34 as described later, and the seal of the compression part 12 can be appropriately performed by the lubricating oil 18.

[0028] Also, as described above, the accumulator shell 26 is supported by the base member 310, and the shape of the lower part of the accumulator shell 26 is formed in a shape along the placement surface of the base member 310. Thereby, for example, by using the base member 310 as a common part with a rotary compressor of another specification that is an existing product, an increase in the parts cost of the rotary compressor 1 of the embodiment can be suppressed, and the manufacturing cost can be reduced.

[0029] Furthermore, for the rotary compressor 1 of the embodiment, components other than the accumulator container 25, the gas-liquid separation pipe 31, the accumulator suction pipe 27, and the communication pipe 104 may be shared with a rotary compressor (hereinafter also referred to as a rotary compressor of a different specification, not shown) in which an accumulator container (not shown) and the compressor main body container are arranged side by side in the radial direction (horizontal direction). Thereby, as components other than the accumulator container 25, the gas-liquid separation pipe 31, the accumulator suction pipe 27, and the communication pipe 104 of the rotary compressor 1 of the embodiment, parts of a rotary compressor of a different specification that are existing products (for example, the compressor main body container 10, the motor 11, the compression part 12) can be diverted, and the manufacturing equipment of the existing product can be used as the manufacturing equipment of this embodiment to reduce the manufacturing cost.

[0030] The compression part 12 has a cylinder 121, an upper end plate 160T, a lower end plate 160S, and a rotating shaft 15. The upper end plate 160T, the cylinder 121, and the lower end plate 160S are laminated in order and fixed by a plurality of bolts 175. A main bearing part 161T is provided on the upper end plate 160T. A sub-bearing part 161S is provided on the lower end plate 160S. A main shaft part 153, an eccentric part 152, and a sub-shaft part 151 are provided on the rotating shaft 15. By fitting the main shaft part 153 of the rotating shaft 15 into the main bearing part 161T of the upper end plate 160T and fitting the sub-shaft part 151 of the rotating shaft 15 into the sub-bearing part 161S of the lower end plate 160S, the rotating shaft 15 is rotatably supported.

[0031] The motor 11 has a stator 111 arranged on the outside and a rotor 112 arranged on the inside. The stator 111 is fixed by shrink fitting on the inner peripheral surface of the main shell 10a. The rotor 112 is fixed by shrink fitting on the rotating shaft 15.

[0032] Inside the compressor main body container 10, lubricating oil 18 in an amount such that the compression part 12 is substantially immersed is enclosed for lubrication of the sliding members of the compression part 12 and for sealing between the high-pressure part and the low-pressure part in the compression chamber.

[0033] Next, the compression part 12 will be described in detail with reference to FIG. 2. The cylinder 121 is provided with a cylindrical hollow portion 130 inside, and a piston 125 is arranged in the hollow portion 130. The piston 125 is fitted to the eccentric portion 152 of the rotating shaft 15. The cylinder 121 is provided with a groove portion provided outward from the hollow portion 130, and a vane 127 is arranged in the groove portion. The cylinder 121 is provided with a spring hole 124 communicating from the outer periphery to the groove portion, and a spring 126 is arranged in the spring hole 124. One end of the vane 127 is pressed against the piston 125 by the spring 126, so that the space outside the piston 125 in the hollow portion 130 of the cylinder 121 is partitioned into a suction chamber 133 and a discharge chamber 131. The cylinder 121 is provided with a suction hole 135 communicating from the outer periphery to the suction chamber 133. A compression part suction pipe 102 is connected to the suction hole 135. The upper end plate 160T is provided with a discharge hole 190 penetrating through the upper end plate 160T and communicating with the discharge chamber 131. A discharge valve 200 for opening and closing the discharge hole 190 and a discharge valve retainer 201 for regulating the deflection of the discharge valve 200 are fixed to the upper end plate 160T by a rivet 202. An upper end plate cover 170 covering the discharge hole 190 is arranged above the upper end plate 160T, and an upper end plate cover chamber 180 closed by the upper end plate 160T and the upper end plate cover 170 is formed. The upper end plate cover 170 is fixed to the upper end plate 160T by a plurality of bolts 175 for fixing the upper end plate 160T and the cylinder 121. The upper end plate cover 170 is provided with an upper end plate cover discharge hole 172 communicating the upper end plate cover chamber 180 with the inside of the compressor main body container 10.

[0034] The flow of the suction refrigerant due to the rotation of the rotating shaft 15 will be described below. Due to the rotation of the rotating shaft 15, the piston 125 fitted to the eccentric portion 152 of the rotating shaft 15 performs a revolution motion, causing the suction chamber 133 to expand in volume and suck in the refrigerant. As the refrigerant suction path, the low-pressure refrigerant in the refrigeration cycle is sucked into the accumulator container 25 through the accumulator suction pipe 27. If liquid is mixed in the refrigerant sucked into the accumulator container 25, it stays at the lower part of the accumulator container 25, and only the gaseous refrigerant is sucked into the gas-liquid separation pipe 31 that opens upward inside the accumulator container 25. The gaseous refrigerant sucked into the gas-liquid separation pipe 31 is sucked into the suction chamber 133 through the connecting pipe 104 and the compression part suction pipe 102. When the amount of liquid refrigerant in the refrigerant sucked from the refrigeration cycle is large, the liquid level of the liquid refrigerant inside the accumulator container 25 may rise above the opening end 31b of the gas-liquid separation pipe 31, and a large amount of liquid refrigerant may flow into the gas-liquid separation pipe 31. If a large amount of liquid refrigerant flows into the compression part 12 through the gas-liquid separation pipe 31, it will cause damage to the compression part 12. To prevent a large amount of liquid refrigerant from flowing into the gas-liquid separation pipe 31, the gas-liquid separation pipe 31 is provided with a liquid return hole 34 for sucking the liquid refrigerant into the gas-liquid separation pipe 31 little by little.

[0035] Next, the flow of the discharged refrigerant due to the rotation of the rotating shaft 15 will be described. Due to the rotation of the rotating shaft 15, the piston 125 fitted to the eccentric portion 152 of the rotating shaft 15 performs a revolution motion, causing the discharge chamber 131 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 180 outside the discharge valve 200, the discharge valve 200 opens and discharges the refrigerant from the discharge chamber 131 to the upper end plate cover chamber 180. The refrigerant discharged into the upper end plate cover chamber 180 is discharged into the compressor main body container 10 from the upper end plate cover discharge hole 172 provided in the upper end plate cover 170.

[0036] The refrigerant discharged into the compressor main body container 10 is guided above the motor 11 through a notch (not shown) that communicates the upper and lower parts provided on the outer periphery of the stator 111, or a gap (not shown) in the winding part of the stator 111, or the gap 115 between the stator 111 and the rotor 112 (see FIG. 1), and is discharged into the refrigeration cycle from the discharge pipe 107 provided on the top shell 10b.

[0037] Next, the flow of the lubricating oil 18 will be described. The lubricating oil 18 enclosed in the lower part of the compressor main body container 10 is supplied to the compression part 12 through the inside of the rotating shaft (not shown) by the centrifugal force of the rotating shaft. The lubricating oil 18 supplied to the compression part 12 is entrained by the refrigerant and becomes atomized, and is discharged into the compressor main body container 10 together with the refrigerant. The atomized lubricating oil 18 discharged into the compressor main body container 10 is separated from the refrigerant by centrifugal force by the rotational force of the motor 11, becomes oil droplets, and returns to the lower part of the compressor main body container 10 again. However, a part of the lubricating oil 18 is not separated and is discharged into the refrigeration cycle together with the refrigerant. The lubricating oil 18 discharged into the refrigeration cycle circulates through the refrigeration cycle and returns to the accumulator container 25, where it is separated inside the accumulator container 25 and stays in the lower part of the accumulator container 25. The lubricating oil 18 staying in the lower part of the accumulator container 25 flows into the gas-liquid separation pipe 31 little by little through the liquid return hole 34 together with the liquid refrigerant, and is sucked into the suction chamber 133 together with the suction refrigerant.

[0038] (Characteristic configuration of the rotary compressor) Next, the characteristic configuration of the rotary compressor 1 of the embodiment will be described. The compressor main body container 10 that houses the compression part 12 and the motor 11 is formed by fixing the opening side 10g of the cup-shaped top shell 10b to the upper end of the vertical cylindrical main shell 10a by welding, and fixing the opening side 10d of the cup-shaped bottom shell 10c to the lower end of the main shell 10a by welding. The accumulator container 25 has the opening side 26a of the accumulator shell 26 fixed to the anti-opening side 10e of the bottom shell 10c by the third welding part X by welding at a position below the second welding part W between the main shell 10a and the bottom shell 10c in the compressor main body container 10, and the inside of the accumulator shell 26 is sealed.

[0039] (Effects of the embodiment) Here, the present embodiment will be described in comparison with the above-mentioned Patent Documents 1 to 3. The compressor of Patent Document 1 includes a compressor main body container and an accumulator container as independent containers, whereas the rotary compressor 1 of the embodiment uses the bottom shell 10c as part of the compressor main body container 10 and part of the accumulator container 25. In the compressor of Patent Document 2, the main shell and the accumulator shell are welded to the bottom shell at a single welding part that they share, whereas in the rotary compressor 1 of the embodiment, a second welding part W between the bottom shell 10c and the main shell 10a and a third welding part X between the bottom shell 10c and the accumulator shell 26 are provided independently. The opening side 26a of the bottom shell 10c is welded to the main shell 10a, and the accumulator shell 26 is welded to the anti-opening side 10e of the bottom shell 10c. In the compressor of Patent Document 3, the inside of a single container is partitioned into a compressor main body container and an accumulator container by a pressure partition wall, whereas in the rotary compressor 1 of the embodiment, an accumulator container 25 is welded to the independently formed compressor main body container 10 using part of the compressor main body container 10.

[0040] As described above, in the rotary compressor 1 of the embodiment, since the bottom shell 10c serves as part of the compressor main body container 10 and part of the accumulator container 25, a compressor can be provided that suppresses the manufacturing cost of the rotary compressor 1 compared to a structure in which the compressor main body container and the accumulator container are provided independently. Further, the second welding portion W between the bottom shell 10c and the main shell 10a and the third welding portion X between the bottom shell 10c and the accumulator shell 26 are located at different positions. The opening side 10d of the bottom shell 10c is welded to the main shell 10a, and the accumulator shell 26 is welded to the anti-opening side 10e of the bottom shell 10c, so that the second welding portion W and the third welding portion X are provided independently of each other. Thereby, it is possible to avoid the refrigerant gas from flowing from the main shell to the accumulator shell through a defective welding portion generated in one welding portion, as in a structure in which one common welding portion is provided. For this reason, even when a welding defect occurs in either the second welding portion W or the third welding portion X, the rotary compressor 1 of the present embodiment can prevent the leakage of the refrigerant gas from the compressor main body container 10 to the accumulator container 25, and since the welding defects of the second welding portion W and the third welding portion X can be easily detected, a highly reliable compressor can be provided.

[0041] Also, in the rotary compressor 1 of the embodiment, among both ends of the gas-liquid separation pipe 31, the end on the side to which the communication pipe 104 is connected is enlarged in diameter so that one end of the communication pipe 104 can be inserted. Thereby, outside the accumulator container 25, the gas-liquid separation pipe 31 and the communication pipe 104 can be easily connected by simply inserting the communication pipe 104 into the enlarged end of the gas-liquid separation pipe 31. Further, among both ends of the compression part suction pipe 102, the end on the side to which the communication pipe 104 is connected is enlarged in diameter so that the other end of the communication pipe 104 can be inserted. Thereby, outside the compressor main body container 10, the compression part suction pipe 102 and the communication pipe 104 can be easily connected by simply inserting the communication pipe 104 into the enlarged end of the compression part suction pipe 102. Furthermore, in the rotary compressor 1 of the embodiment, in each of the gas-liquid separation pipe 31 and the compression part suction pipe 104, the end on the side connected to the communication pipe 104 is enlarged in diameter outside the compressor main body container 10 and the accumulator container 25. Therefore, both ends of the communication pipe 104 can be easily connected to the enlarged ends of the two pipes (gas-liquid separation pipe 31, compression part suction pipe 104) by a single insertion operation.

[0042] Further, in the rotary compressor 1 of the embodiment, among both ends of the communication pipe 104, the end on the side connected to the gas-liquid separation pipe 31 is bent along the radial direction of the accumulator container 25. Therefore, by bringing one end of the communication pipe 104 closer to the inside in the radial direction of the accumulator container 25, it can be easily connected to the gas-liquid separation pipe 31. Also, among both ends of the communication pipe 104, the end on the side connected to the compression part suction pipe 102 is bent along the radial direction of the compressor main body container 10. Therefore, by bringing the other end of the communication pipe 104 closer to the inside in the radial direction of the compressor main body container 10, it can be easily connected to the compression part suction pipe 102. Furthermore, in the rotary compressor 1 of the embodiment, the communication pipe 104 extends along the vertical direction of the compressor main body container 10 and the accumulator container 25, and both ends of the communication pipe 104 (that is, the end on the side connected to the gas-liquid separation pipe 31 and the end on the side connected to the compression part suction pipe 102) are bent along the radial direction of the compressor main body container 10 and the accumulator container 25. Therefore, by bringing both ends of the communication pipe 104 closer to the inside in the radial direction of the compressor main body container 10 and the accumulator container 25 with a single operation, it can be easily connected to each of the two pipes (gas-liquid separation pipe 31, compression part suction pipe 104). As a result, the connection work between the communication pipe 104 and the gas-liquid separation pipe 31 and the connection work between the communication pipe 104 and the compression part suction pipe 102 are facilitated, and each of the pipes of the gas-liquid separation pipe 31, the compression part suction pipe 102, and the communication pipe 104 can be formed in a simple shape. Consequently, an increase in the manufacturing cost of the rotary compressor 1 can be suppressed.

[0043] Further, in the rotary compressor 1 of the embodiment, the accumulator shell 26 has a concave bottom surface that bulges downward, and inside the accumulator shell 26, the gas-liquid separation pipe 31 is bent along the bottom surface of the accumulator shell 26. As a result, the gas-liquid separation pipe 31 can be arranged closer to the vicinity of the bottom surface of the accumulator shell 26. And since the liquid return hole 34 for sucking the liquid refrigerant into the gas-liquid separation pipe 31 little by little is arranged in a portion along the bottom surface of the accumulator shell 26 formed by bending a part of the gas-liquid separation pipe 31, it becomes easier to return the lubricating oil 18 together with the liquid refrigerant accumulated at the bottom of the accumulator shell 26 to the compression part 12 through the liquid return hole 34, and the compression part 12 can be properly sealed by the lubricating oil 18.

[0044] Further, in the rotary compressor 1 of the embodiment, the fourth welded part between the gas-liquid separation pipe 31 and the accumulator container 25, the fifth welded part between the accumulator suction pipe 27 and the accumulator container 25, and the sixth welded part between the gas-liquid separation pipe 31 and the communication pipe 104 are provided outside the accumulator container 25. Also, in the rotary compressor 1, the seventh welded part between the guide pipe 191 and the compressor main body container 10, the eighth welded part between the guide pipe 101 and the compression part suction pipe 102, and the ninth welded part between the compression part suction pipe 102 and the communication pipe 104 are provided outside the compressor main body container 10. As a result, it becomes possible to easily detect leakage of refrigerant gas from the fourth to ninth welded parts outside the rotary compressor 1, and welding defects of each welded part can be repaired to form appropriate welded parts.

[0045] Further, in the rotary compressor 1 of the embodiment, the constituent members excluding the accumulator container 25, the gas-liquid separation pipe 31, the accumulator suction pipe 27, and the communication pipe 104 are made common with a rotary compressor of a different specification in which the accumulator container and the compressor main body container are arranged side by side in the radial direction. As a result, the rotary compressor 1 can reduce the manufacturing cost by diverting parts of a rotary compressor of a different specification (for example, the compressor main body container 10, the motor 11, the compression part 12) and using the existing manufacturing equipment as the manufacturing equipment of this embodiment.

[0046] Further, in the rotary compressor 1 of the embodiment, the accumulator shell 26 is supported by a base member 310 used in a rotary compressor of a different specification, and the lower shape of the accumulator shell 26 is formed so as to be supported by the base member 310. By using the base member 310 as a common part with a rotary compressor of a different specification in this way, an increase in the component cost of the rotary compressor 1 can be suppressed, and the manufacturing cost can be reduced.

[0047] Hereinafter, a modified example will be described with reference to the drawings. In the modified example, the same reference numerals as those in the embodiment are given to the same constituent members as those in the embodiment, and the description thereof will be omitted.

[0048] (Modified Example) FIG. 3 is a longitudinal sectional view showing a main part of the rotary compressor 2 of the modified example. As in the modified example shown in FIG. 3, the main shell 10a and the bottom shell 10c of the compressor main body container 10 are integrally formed by pressing (press molding) a steel plate material. The opening side 26a of the cup-shaped accumulator shell 26 is fixed to the outer peripheral wall 10f of the bottom shell 10c integrally formed with the main shell 10a by welding.

[0049] Also in the rotary compressor 2 of the modified example, a compressor can be provided that suppresses the manufacturing cost of the rotary compressor 2 by a configuration in which the bottom shell 10c also serves as a part of the compressor main body container 10 and a part of the accumulator container 25.

[0050] Further, by integrally forming the main shell 10a and the bottom shell 10c of the compressor main body container 10 by pressing a steel plate material, the second welded portion W between the main shell 10a and the bottom shell 10c can be eliminated, and leakage from the compressor main body container 10 to the accumulator container 25 due to welding defects can be prevented, and a highly reliable compressor can be provided.

[0051] Note that the rotary compressor of this embodiment is not limited to a so-called single-cylinder type rotary compressor having one cylinder, and may be applied to a so-called two-cylinder type rotary compressor having two cylinders. Further, although this embodiment has been described by taking a rotary compressor as an example, it may be applied to compressors of other compression methods such as scroll compressors, and the same effects as those of this embodiment can be obtained.

Explanation of Signs

[0052] 1 - 2 Rotary compressor 10 Compressor main body container 10a Main shell 10b Top shell 10c Bottom shell 10d Opening side of the bottom shell 10e Side opposite to the opening of the bottom shell 10f Outer peripheral wall of the bottom shell 10g Opening side of the top shell 11 Motor 12 Compression part 15 Rotating shaft 18 Lubricating oil 25 Accumulator container 26 Accumulator shell 26a Opening side of the accumulator shell 27 Accumulator suction pipe 31 Gas-liquid separation pipe 31b Opening end of the gas-liquid separation pipe 34 Liquid return hole 101 Guide pipe 102 Compression part suction pipe 104 Connecting pipe 107 Discharge pipe 111 Stator 112 Rotor 121 Cylinder 124 Spring hole 125 Piston 126 Spring 127 Vane 130 Hollow part 131 Discharge chamber 133 Suction chamber 135 Suction Hole 151 Sub - shaft Part 152 Eccentric Part 153 Main - shaft Part 160T Upper End Plate 160S Lower End Plate 161T Main - bearing Part 161S Sub - bearing Part 170 Upper End - plate Cover 172 Upper End - plate Cover Discharge Hole 175 Bolt 180 Upper End - plate Cover Chamber 190 Discharge Hole 200 Discharge Valve 201 Discharge - valve Presser 202 Rivet 310 Base Member First Welding Part of V - top Shell and Main Shell Second Welding Part of W - main Shell and Bottom Shell Third Welding Part of X - bottom Shell and Accumulator Shell

Claims

1. Inside a vertical cylindrical compressor main body container, there is a compression part that sucks in and compresses refrigerant and discharges the compressed refrigerant into the compressor main body container, and a motor that drives the compression part, are accommodated, In a hermetic compressor having an accumulator container that separates the gas-liquid of the refrigerant sucked from the refrigeration cycle below the compressor main body container and supplies the gaseous refrigerant to the compression part, The compressor main body container has a vertical cylindrical main shell, a cup-shaped top shell, and a cup-shaped bottom shell. The opening side of the top shell is fixed to the upper end of the main shell by welding at a first welded part, and the opening side of the bottom shell is fixed to the lower end of the main shell by welding at a second welded part, so that the inside of the main shell is sealed, The accumulator container has a cup-shaped accumulator shell. The opening side of the accumulator shell is fixed to the opposite opening side of the bottom shell by welding at a third welded part below the position of the second welded part in the compressor main body container, so that the inside of the accumulator shell is sealed, The first welded part, the second welded part, and the third welded part are exposed outside the compressor main body container, hermetic compressor.

2. Inside a vertical cylindrical compressor main body container, there is a compression part that sucks in and compresses refrigerant and discharges the compressed refrigerant into the compressor main body container, and a motor that drives the compression part, are accommodated, In a hermetic compressor having an accumulator container that separates the gas-liquid of the refrigerant sucked from the refrigeration cycle below the compressor main body container and supplies the gaseous refrigerant to the compression part, The compressor main body container has a vertical cylindrical main shell, a cup-shaped top shell, and a cup-shaped bottom shell. The main shell and the bottom shell are integrally formed by press molding of a steel plate material. The opening side of the top shell is fixed to the upper end of the main shell by welding at a welded part, so that the inside of the main shell is sealed, The accumulator container has a cup-shaped accumulator shell. The opening side of the accumulator shell is fixed to the outer peripheral wall of the bottom shell by welding at another welded part, so that the inside of the accumulator shell is sealed, The welded part and the other welded part are exposed outside the compressor main body container, hermetic compressor. Claim 3: Inside a vertical cylindrical compressor main body container, there is a compression section that sucks in and compresses refrigerant and discharges the compressed refrigerant into the compressor main body container, and a motor that drives the compression section, and they are accommodated. Below the compressor main body container, there is an accumulator container that separates the gas-liquid of the refrigerant sucked from the refrigeration cycle and supplies the gaseous refrigerant to the compression section. The compressor main body container has a vertical cylindrical main shell, a cup-shaped top shell, and a cup-shaped bottom shell. The opening side of the top shell is fixed to the upper end of the main shell by welding at a first welded part, and the opening side of the bottom shell is fixed to the lower end of the main shell by welding at a second welded part, so that the inside of the main shell is sealed. The accumulator container has a cup-shaped accumulator shell. The opening side of the accumulator shell is fixed to the anti-opening side of the bottom shell by welding at a third welded part below the position of the second welded part in the compressor main body container, so that the inside of the accumulator shell is sealed. It is a hermetic compressor, A gas-liquid separation pipe that penetrates the accumulator shell and sends gaseous refrigerant from the inside of the accumulator container. A connecting pipe connected to the gas-liquid separation pipe outside the accumulator container. A compression section suction pipe connected to the connecting pipe and through which the compression section sucks refrigerant. An accumulator suction pipe that penetrates the accumulator shell and sucks refrigerant from the refrigeration cycle into the inside of the accumulator container. At the end of the gas-liquid separation pipe where the connecting pipe is connected, one end of the connecting pipe is inserted. At the end of the compression section suction pipe where the connecting pipe is connected, the other end of the connecting pipe is inserted. A hermetic compressor, in which a fourth welded part that joins the gas-liquid separation pipe and the accumulator container, a fifth welded part that joins the accumulator suction pipe and the accumulator container, and a sixth welded part that joins the gas-liquid separation pipe and the connecting pipe are provided outside the accumulator container. Claim 4: Inside a vertical cylindrical compressor main body container, there is a compression section that sucks in and compresses refrigerant and discharges the compressed refrigerant into the compressor main body container, and a motor that drives the compression section, and they are accommodated. Below the compressor main body container, there is an accumulator container that separates the gas-liquid of the refrigerant sucked from the refrigeration cycle and supplies the gaseous refrigerant to the compression section. The compressor main body container has a vertical cylindrical main shell, a cup-shaped top shell, and a cup-shaped bottom shell. The main shell and the bottom shell are integrally formed by press molding a steel plate, and the opening side of the top shell is fixed to the upper end of the main shell by welding so that the inside of the main shell is sealed. The accumulator container has a cup-shaped accumulator shell, and the opening side of the accumulator shell is fixed to the outer peripheral wall of the bottom shell by welding so that the inside of the accumulator shell is sealed. It is a hermetic compressor, A gas-liquid separation pipe that penetrates the accumulator shell and sends gaseous refrigerant from the inside of the accumulator container, A communication pipe connected to the gas-liquid separation pipe outside the accumulator container, A compression part suction pipe connected to the communication pipe and through which the compression part sucks refrigerant through the communication pipe, An accumulator suction pipe that penetrates the accumulator shell and sucks refrigerant from the refrigeration cycle into the inside of the accumulator container. At the end of the gas-liquid separation pipe to which the communication pipe is connected, one end of the communication pipe is inserted. At the end of the compression part suction pipe to which the communication pipe is connected, the other end of the communication pipe is inserted. A fourth welded part that joins the gas-liquid separation pipe and the accumulator container, a fifth welded part that joins the accumulator suction pipe and the accumulator container, and a sixth welded part that joins the gas-liquid separation pipe and the communication pipe are provided outside the accumulator container. Hermetic compressor.

5. The communication pipe extends along the vertical direction of the compressor main body container and the accumulator container. One end and the other end of the communication pipe are bent along the radial direction of the compressor main body container and the accumulator container. The hermetic compressor according to claim 4.

6. The accumulator shell has a concave bottom surface that bulges downward. Inside the accumulator shell, the gas-liquid separation pipe is bent along the bottom surface. The hermetic compressor according to claim 4.

7. In the hermetic compressor, the components excluding the accumulator container, the gas-liquid separation pipe, the accumulator suction pipe, and the communication pipe are Another accumulator container that separates the gas and liquid of the refrigerant inhaled from the refrigeration cycle and supplies the gaseous refrigerant to the compression section is common to another compressor provided side by side with the compressor main body container in the radial direction of the compressor main body container. The hermetic compressor according to claim 4.

8. The other compressor includes a base member that supports the compressor main body container. In the hermetic compressor, the accumulator shell is supported by the base member, and the shape of the lower part of the accumulator shell is formed so as to be supported by the base member. The hermetic compressor according to claim 7.

Images