JP2023133843A - Hermetic compressor and manufacturing method thereof - Google Patents

Abstract

To provide a hermetic compressor which prevents the temperature of coolant within an accumulator container joined to a compressor main body container from rising.SOLUTION: A hermetic compressor includes: a vertically-disposed cylindrical compressor main body container in which a discharge pipe and a suction pipe for coolant are provided; an accumulator container connected with the suction pipe; a compression part which is arranged within the compressor main body container, and compresses and discharges from the discharge pipe the coolant sucked from the accumulator container via the suction pipe; and a motor which is arranged within the compressor main body container and drives the compression part. The accumulator container is joined to the compressor main body container. On an internal part of the accumulator container, a partition member which partitions the internal part into a heat insulation part and an accumulator part is provided. The heat insulation part is formed between the partition member and the compressor main body container. The heat insulation part is formed between the partition member and the compressor main body container and has a heat insulation space which blocks heat transfer from the compressor main body container to the accumulator part. On the accumulator container, a penetration port which connects the heat insulation space and an outer part of the compressor main body container is provided and the penetration port is closed in such a state that the heat insulation space has a negative pressure.SELECTED DRAWING: Figure 1

Description

The present invention relates to a hermetic compressor and a method for manufacturing the same.

A hermetic compressor houses a compression section and a motor that drives the compression section inside a vertical cylindrical compressor main container, and separates the refrigerant into gas refrigerant and liquid refrigerant below the compressor main container. (Hereinafter, the gas-liquid refrigerant is referred to as separation.) Compressors are known that are provided with an accumulator container for sucking only the gas refrigerant into the compression section.

The compressor of Patent Document 1 is a compressor with a rotary compression section, and an accumulator container that separates gas and liquid of the refrigerant sucked into the compression section is constituted by a container independent of the compressor main body container. It is arranged below the machine main body container, and the compressor main body container and the accumulator container are connected using a bracket. The compressor of Patent Document 2 is a compressor in which the compression section is of a scroll type, and an accumulator container is directly joined to the lower part of the compressor body container that accommodates the compression section and a motor that drives the compression section. In the compressor of Patent Document 3, the inside of a closed container is divided by a pressure partition wall, the upper part of the pressure partition wall is a compressor body container in which a compression part and a motor are accommodated, and the lower part of the pressure partition wall is an accumulator container. .

JP2020-109283A Japanese Patent Application Publication No. 3-202682 Japanese Patent Application Publication No. 6-66258

In a compressor in which an accumulator container is joined to the bottom of the compressor main body container as in Patent Documents 1, 2, and 3 mentioned above, the manufacturing cost of the compressor is suppressed, and refrigerant leakage from the compressor main body container to the accumulator container is prevented. In order to prevent this and realize a highly reliable hermetic compressor, a structure has been considered in which the upper end of the accumulator container is welded to the bottom of the compressor main container. However, when the accumulator container is joined to the compressor main container, the heat generated inside the compressor main container is likely to be transmitted to the accumulator container, and there is a possibility that the refrigerant in the accumulator container will be heated. By heating the refrigerant in the accumulator container, the temperature of the refrigerant sucked into the compressor body container from the accumulator container increases, and the efficiency of the rotary compressor decreases with this temperature increase.

The disclosed technology has been made in view of the above, and provides a hermetic compressor and a method for manufacturing the same that can suppress the temperature rise of refrigerant in an accumulator container joined to a compressor main container. The purpose is to provide.

One aspect of the hermetic compressor disclosed in the present application includes a vertically placed cylindrical compressor body container provided with a refrigerant discharge pipe and a suction pipe, an accumulator container connected to the suction pipe, and an inside of the compressor main body container. The compressor is provided with a compression section that is disposed in the accumulator container and compresses the refrigerant sucked in through the suction pipe from the accumulator container and discharges it from the discharge pipe, and a motor that is disposed in the compressor main container and drives the compression section. The accumulator container is joined to the compressor body container. A partition member is provided inside the accumulator container to partition the inside into a heat insulating section and an accumulator section. The heat insulating section is formed between the partition member and the compressor main body container. The heat insulating part is formed between the partition member and the compressor main body container, and has a heat insulating space that blocks heat transfer from the compressor main body container to the accumulator part. The accumulator container is provided with a through hole that connects the heat insulating space with the outside of the compressor main body container, and the through hole is closed so that the heat insulating space is under negative pressure.

According to one aspect of the hermetic compressor disclosed in the present application, it is possible to suppress an increase in the temperature of the refrigerant in the accumulator container joined to the compressor main body container.

FIG. 1 is a longitudinal sectional view showing a rotary compressor of Example 1. FIG. 2 is an exploded perspective view showing the compression section of the rotary compressor of Example 1. FIG. 3 is a perspective view showing the rotary compressor of Example 1. FIG. 4 is a longitudinal cross-sectional view showing essential parts in Example 2.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the hermetic compressor and its manufacturing method disclosed in the present application will be described in detail below with reference to the drawings. Note that the hermetic compressor and the manufacturing method thereof disclosed in the present application are not limited to the following examples.

(Configuration of rotary compressor)
In the first embodiment, a rotary compressor will be described as an example of a hermetic compressor. FIG. 1 is a longitudinal sectional view showing a rotary compressor of Example 1. FIG. 2 is an exploded perspective view showing the compression section of the rotary compressor of Example 1.

As shown in FIG. 1, the rotary compressor 1 includes a compression section 12 that sucks refrigerant into the compressor body container 10 from a compression section suction pipe 102 and discharges the compressed refrigerant into the compressor body container 10. and a motor 11 that drives the compression section 12, and discharges the high-pressure refrigerant compressed by the compression section 12 into the compressor main body container 10 and further discharges it into the refrigeration circuit through the discharge pipe 107. This is a hermetic compressor.

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. 10g is welded and fixed at a first welding part V, and the opening side 10d of the bottom shell 10c is welded and fixed to the lower end of the main shell 10a at a second welding part W.

A compression section suction pipe 102 for sucking low-pressure refrigerant of the refrigeration circuit into the compression section 12 is provided to penetrate the main shell 10a. Specifically, a guide tube 101 is fixed to the main shell 10a by brazing, and a compression section suction tube 102 passes through the inside of the guide tube 101 and is fixed to the guide tube 101 by brazing.

A discharge pipe 107 for discharging the high-pressure refrigerant compressed in the compression section 12 from the inside of the compressor main body container 10 to the refrigeration circuit is provided to penetrate the top shell 10b. The discharge pipe 107 is directly brazed and fixed to the top shell 10b.

An accumulator container 25 is provided below the compressor body container 10 for separating the gas and liquid of the low-pressure refrigerant sucked from the refrigeration circuit and allowing only the gas refrigerant to be sucked into the compression section 12. Specifically, at a position below the second weld W between the main shell 10a and the bottom shell 10c in the compressor body container 10, the opening side 26a of the accumulator shell 26 is connected to the opposite opening side 10e of the bottom shell 10c. The accumulator container 25 is formed by welding and fixing at the welding portion X and sealing the inside of the accumulator shell 26.

In the accumulator shell 26, an accumulator suction pipe 27 that sucks refrigerant from the refrigeration circuit into the inside of the accumulator container 25, and a gas-liquid separation pipe 31 that sends a gaseous refrigerant from inside the accumulator, each passing through the accumulator shell 26 and passing through the accumulator shell 26. 26 by brazing.

The gas-liquid separation pipe 31 is connected to the compression section suction pipe 102 via a suction pipe 104 outside the accumulator container 25 .

A base member 310 that supports the entire compressor is welded and fixed to the lower part of the accumulator shell 26.

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 stacked in this order and fixed with a plurality of bolts 175. 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 is provided with a main shaft portion 153, an eccentric portion 152, 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, so that the rotating shaft 15 rotates. freely supported.

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

Inside the compressor main body container 10, lubricating oil 18 is sealed in an amount such that the compression part 12 is almost immersed in it, in order to lubricate the sliding members of the compression part 12 and seal the high-pressure part and the low-pressure part in the compression chamber. ing.

Next, the compression unit 12 will be explained in detail with reference to FIG.
The cylinder 121 is provided with a cylindrical hollow part 130 inside, and a piston 125 is arranged in the hollow part 130. The piston 125 is engaged with an eccentric portion 152 of the rotating shaft 15. The cylinder 121 is provided with a groove extending outward from the hollow portion 130, and a vane 127 is disposed in the groove. The cylinder 121 is provided with a spring hole 124 communicating from the outer periphery to the groove, and a spring 126 is disposed in the spring hole 124. By pressing one end of the vane 127 against the piston 125 by the spring 126, a space outside the piston 125 in the hollow portion 130 of the cylinder 121 is divided into a suction chamber 133 and a discharge chamber 131. The cylinder 121 is provided with a suction hole 135 that communicates with the suction chamber 133 from the outer periphery. The compression section suction pipe 102 is connected to the suction hole 135 . The upper end plate 160T is provided with a discharge hole 190 that passes through the upper end plate 160T and communicates with the discharge chamber 131. A discharge valve 200 that opens and closes the discharge hole 190 and a discharge valve holder 201 that restricts warping of the discharge valve 200 are fixed to the upper end plate 160T by rivets 202. An upper end plate cover 170 that covers the discharge hole 190 is disposed above the upper end plate 160T, and an upper end plate cover chamber 180 is closed by the upper end plate 160T and the upper end plate cover 170. The upper end plate cover 170 is fixed to the upper end plate 160T by a plurality of bolts 175 that fix 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 that communicates the upper end plate cover chamber 180 with the inside of the compressor main body container 10 .

The flow of the suction refrigerant due to the rotation of the rotating shaft 15 will be explained below.
As the rotation of the rotation shaft 15 causes the piston 125 fitted to the eccentric portion 152 of the rotation shaft 15 to revolve, the suction chamber 133 sucks refrigerant while expanding its volume. As a refrigerant suction path, the low-pressure refrigerant of the refrigeration circuit is sucked into the accumulator container 25 through the accumulator suction pipe 27, and if liquid is mixed in the refrigerant sucked into the accumulator container 25, the lower part of the accumulator container 25. Only the gaseous refrigerant is sucked into the gas-liquid separation pipe 31 that is open upward inside the accumulator container 25. The gas refrigerant sucked into the gas-liquid separation pipe 31 passes through the suction pipe 104 and the compression section suction pipe 102 and is sucked into the suction chamber 133. When the amount of liquid refrigerant among the refrigerants sucked from the refrigeration circuit is large, the liquid level of the liquid refrigerant inside the accumulator container 25 rises above the open end 31b of the gas-liquid separation tube 31, and a large amount of the liquid refrigerant is vaporized. There is a possibility that it will flow into the liquid separation tube 31. If a large amount of liquid refrigerant flows into the compression section 12 through the gas-liquid separation pipe 31, it may cause damage to the compression section 12. In order to prevent a large amount of liquid refrigerant from flowing into the gas-liquid separation tube 31, the gas-liquid separation tube 31 is provided with a liquid return hole 34 for sucking the liquid refrigerant into the gas-liquid separation tube 31 little by little.

Next, the flow of the discharged refrigerant due to the rotation of the rotating shaft 15 will be explained.
Due to the rotation of the rotating shaft 15, the piston 125 fitted to the eccentric portion 152 of the rotating shaft 15 revolves, and the discharge chamber 131 compresses the refrigerant while reducing its volume, and the pressure of the compressed refrigerant is applied to the discharge valve. When the pressure becomes higher than the pressure in the upper end plate cover chamber 180 on the outside of the refrigerant 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 an upper end plate cover discharge hole 172 provided in the upper end plate cover 170.

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

Next, the flow of the lubricating oil 18 will be explained.
Lubricating oil 18 sealed in the lower part of the compressor body container 10 is supplied to the compression section 12 through the inside 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 caught up in the refrigerant, becomes a mist, and is discharged into the compressor body container 10 together with the refrigerant. The lubricating oil 18 discharged into the compressor body container 10 in the form of mist is separated from the refrigerant by centrifugal force due to the rotational force of the motor 11, and returns to the lower part of the compressor body container 10 again as oil droplets. . However, some of the lubricating oil 18 is not separated and is discharged into the refrigeration circuit together with the refrigerant. The lubricating oil 18 discharged into the refrigeration circuit circulates through the refrigeration circuit, returns to the accumulator container 25, is separated inside the accumulator container 25, and stays in the lower part of the accumulator container 25. The lubricating oil 18 accumulated in the lower part of the accumulator container 25 flows into the gas-liquid separation pipe 31 little by little together with the liquid refrigerant through the liquid return hole 34, and is sucked into the suction chamber 133 together with the suction refrigerant.

(Characteristic configuration of rotary compressor)
Next, the characteristics of the rotary compressor 1 of Example 1 will be explained. Features of this embodiment include, as shown in FIG. 1, that a heat insulating section 35 is provided inside the accumulator container 25.

(Structure of insulation part)
FIG. 3 is a perspective view showing the rotary compressor 1 of the first embodiment. As shown in FIGS. 1 and 3, a partition member 28 is provided inside the accumulator shell 26 of the accumulator container 25 to partition the inside into a heat insulating section 35 and an accumulator section 36. As shown in FIGS. A heat insulating portion 35 is formed between the partition member 28 and the bottom shell 10c of the compressor body container 10 to block heat transfer from the compressor body container 10 to the accumulator portion 36.

The heat insulating part 35 is provided with a through hole 37 that connects the heat insulating space 35a and the external space of the compressor main body container 10, and the heat insulating space 35a is under negative pressure (atmospheric pressure in the heat insulating space 35a of the heat insulating part 35 is The through-hole 37 is closed in a state where the pressure is lower than the atmospheric pressure (the pressure in the external space of the main body container 10). In other words, the heat insulating space 35a of the heat insulating section 35 is in a vacuum state (a space filled with gas at a pressure lower than atmospheric pressure). Specifically, the accumulator shell 26 is provided with a connecting pipe 38 that passes through the through hole 37, and a welded portion Q where the connecting pipe 38 is brazed and joined to the through hole 37 is provided on the outside of the accumulator shell 26. It is formed. The heat insulating space 35a of the heat insulating section 35 is evacuated to a negative pressure (vacuum) using, for example, a vacuum pump connected to the connecting pipe 38. After the inside of the heat insulating space 35a of the heat insulating part 35 is evacuated, a closing part 39 that closes the connecting pipe 38 is formed at one end of the connecting pipe 38 outside the accumulator container 25. The closing portion 39 is formed by, for example, crushing the connecting pipe 38 using a tool such as pinch-off pliers, and sealing the crushed portion by brazing. That is, by sealing the connecting pipe 38, the through hole 37 is closed while the heat insulating space 35a of the heat insulating section 35 is under negative pressure (vacuum). Note that the through-hole 37 being closed refers to a state in which fluid does not enter or exit through the through-hole 37 . In the first embodiment, the connecting pipe 38 passed through the through hole 37 is sealed, so that the through hole 37 is indirectly closed.

As described above, the accumulator container 25 has the third welded portion X where the opening side 26a, which is the upper end of the accumulator shell 26, is joined to the bottom shell 10c of the compressor main container 10. The open side 26a of the accumulator shell 26 is closed by the bottom shell 10c.

The outer circumference of the partition member 28 is curved downward from the accumulator shell 26. The partition member 28 is fitted so that the outer circumferential surface of the curved outer circumferential portion is in contact with the inner circumferential surface of the main shell 26b, and the inner circumferential surface of the main shell 26b and the outer circumferential surface of the outer circumferential portion of the partition member 28 form a fourth welded portion. It is joined by Y. Further, each of the third welded portions X and the fourth welded portions Y of the accumulator shell 26 is formed over the circumferential direction of the accumulator shell 26. Therefore, the introduction space into which the refrigerant is introduced inside the accumulator shell 26 is sealed by the main shell 26b, the bottom shell 26c, and the partition member 28. Further, the heat insulation space 35a of the heat insulation part 35 is formed by the opening side 26a of the accumulator shell 26, the bottom shell 10c of the compressor main body container 10, and the partition member 28. The outer peripheral portion of the partition member 28 is not limited to a shape that is curved downward from the accumulator shell 26, but may be curved upward from the accumulator shell 26.

In the manufacturing process of the rotary compressor 1 of this embodiment, the partition member 28 is joined to the main shell 26b of the accumulator shell 26 at the fourth welded portion Y. Subsequently, after joining the accumulator shell 26 to the bottom shell 10c of the compressor main body container 10 at the third welding part Exhaust. After the heat insulating space 35a of the heat insulating section 35 is brought into negative pressure (vacuum) in this way, a closing part 39 is formed at one end of the connecting pipe 38, thereby closing the heat insulating space 35a. Further, in the manufacturing process of the rotary compressor 1, the through hole 37 is closed by sealing the connecting pipe 38 outside the accumulator container 25.

(Effects of Example 1)
As described above, in the rotary compressor 1 of the first embodiment, the heat insulating section 35 is formed inside the accumulator shell 26 between the partition member 28 and the compressor main body container 10 (bottom shell 10c). The heat insulating section 35 has a heat insulating space 35a that blocks heat transfer from the compressor main body container 10 to the accumulator section 36. The accumulator container 25 (accumulator shell 26) is provided with a through hole 37 that connects the heat insulating space 35a of the heat insulating section 35 with the outside of the compressor body container 10. The state is blocked. Thereby, in the case where the accumulator container 25 joined to the compressor main body container 10 is provided, heat transfer from the compressor main body container 10 to the internal space 36a of the accumulator section 36 can be suppressed by the heat insulating section 35, so that the accumulator It is possible to suppress the temperature of the refrigerant in the container 25 (accumulator section 36) from rising. Moreover, when the insulation space 35a of the insulation part 35 is under negative pressure (vacuum) and the insulation space 35a is at atmospheric pressure (that is, when the insulation space 35a is filled with air at atmospheric pressure) ), the density of the fluid that contributes to heat transfer in the heat insulating space 35a is lower, and therefore heat transfer by convection in the heat insulating space 35a is less likely to occur, further suppressing heat transfer from the compressor main body container 10 to the accumulator section 36. be able to.

Further, in the rotary compressor 1 of the first embodiment, the connecting pipe 38 is brazed and sealed on the outside of the accumulator shell 26, so that the through hole 37 is indirectly closed. Thereby, by sealing the connecting pipe 38 with a simple structure, the through hole 37 can be easily closed while the heat insulating space 35a of the heat insulating part 35 remains under negative pressure.

Example 2 will be described below with reference to the drawings. In the second embodiment, the same constituent members as those in the first embodiment are given the same reference numerals as those in the first embodiment, and explanations thereof will be omitted.

FIG. 4 is a longitudinal cross-sectional view showing essential parts in Example 2. The second embodiment differs from the first embodiment in that a connecting pipe 48 connected to a refrigeration circuit (not shown) is provided instead of the connecting pipe 38 in which the sealing portion 39 is formed.

As shown in FIG. 4, the heat insulating section 35 in Example 2 has a connecting pipe 48 provided in the through hole 37, and one end 48a of the connecting pipe 48 connects to a refrigeration circuit (not shown). It is connected to piping 50 that constitutes the section. Further, on the outside of the accumulator shell 26, the connecting pipe 48 is provided with a sealing valve 49 for closing the flow path within the connecting pipe 48. By closing the sealing valve 49, the insulation space 35a of the insulation part 35 is under negative pressure (vacuum), and the through hole 37 is closed.

By connecting the connecting pipe 48 to the piping 50 of the refrigeration circuit, the second embodiment allows the compressor body container 10 to be evacuated by opening the sealing valve 49 during the evacuating process of the refrigeration circuit. At the same time, the heat insulating space 35a of the heat insulating section 35 can be evacuated. After the heat insulating space 35a of the heat insulating part 35 is evacuated, the flow path in the connecting pipe 48 is closed by closing the sealing valve 49, and the heat insulating space 35a in the heat insulating part 35 is brought into negative pressure (vacuum). The through hole 37 is closed.

(Effects of Example 2)
According to the second embodiment, as in the first embodiment, the through hole 37 is closed while the heat insulating space 35a of the heat insulating part 35 is under negative pressure, so that the accumulator container joined to the compressor main body container 10 25, the heat transfer from the compressor main body container 10 to the internal space 36a of the accumulator section 36 can be suppressed by the heat insulating section 35, so that the temperature of the refrigerant in the accumulator container 25 (accumulator section 36) can be reduced. It is possible to suppress the rise. Furthermore, the connecting pipe 48 is sealed by a sealing valve 49 outside the accumulator shell 26, so that the through hole 37 is indirectly closed. Thereby, by sealing the connecting pipe 48 with a simple structure, the through hole 37 can be easily closed while the heat insulating space 35a of the heat insulating part 35 remains under negative pressure.

In addition, in the second embodiment, by connecting the connecting pipe 48 provided with the sealing valve 49 to the piping 50 of the refrigeration circuit, the compressor main body container 10 is evacuated and the compressor main body container 10 is evacuated and the compressor main body container 10 is simultaneously insulated. The heat insulating space 35a of the section 35 can be evacuated. Therefore, in the manufacturing process of the rotary compressor 1, the step of evacuating the heat insulating space 35a of the heat insulating section 35 can be omitted.

Embodiments 1 and 2 described above are examples for making the heat insulating space 35a of the heat insulating part 35 negative pressure (vacuum), and the entire rotary compressor 1 is After the heat insulating space 35a of the heat insulating section 35 is evacuated after being placed in a vacuum furnace, the through hole 37 may be directly closed with a sealing plug or a brazing material.

Note that in addition to suppressing heat transfer between the compressor main body container 10 and the accumulator container 25, a heat insulating space 35a of the heat insulating part 35 is formed in order to further suppress heat dissipation due to radiation from the compressor main body container 10. It is desirable that the inner wall surface has a mirror surface. In this case, for example, the bottom shell 10c of the compressor body container 10, the main shell 26b of the accumulator shell 26, and the inner wall surface of the heat insulating space 35a of the heat insulating section 35 in the partition member 28 are provided with metal forming the accumulator shell 26, etc. Before the plate bending process and welding process, mirror finishing is performed by polishing the surface of the metal plate or plating the surface of the metal plate with metal such as copper. Thereby, the radiant heat from the compressor main body container 10 is reflected on the inner wall surface of the heat insulating space 35a of the heat insulating part 35, and the radiation from the compressor main body container 10 is suppressed, thereby improving the heat insulation properties of the heat insulating part 35.

In the present disclosure, the opening side 26a of the accumulator shell 26 is not limited to a structure in which it is joined to the bottom shell 10c of the compressor main body container 10. Although not shown, the open side 26a of the accumulator shell 26 may be joined to the main shell 10a of the compressor main body container 10. Further, the outer peripheral part of the partition member 28 forming the heat insulating part 35 may be curved upward of the accumulator shell 26 and joined to the outer peripheral surface of the opening side 10d of the bottom shell 10c of the compressor main body container 10. In this case, the opening side 26a of the accumulator shell 26 is joined to the outer circumference of the partition member 28, and indirectly joined to the bottom shell 10c of the compressor main body container 10 via the partition member 28. As described above, in the structure in which the opening side 26a of the accumulator shell 26 is joined to the compressor body container 10 in the present disclosure, the opening side 26a of the accumulator shell 26 is connected to the bottom shell of the compressor body container 10 via the partition member 28. 10c is included.

Further, in this embodiment, the opening side 26a of the accumulator shell 26 is joined to the bottom shell 10c of the compressor body container 10, but for example, the annular accumulator shell They may be arranged over the circumferential direction of the surface. Further, the cylindrical accumulator shell may be joined to the top shell 10b of the compressor main body container 10. Even in such a case, the same effects as in this embodiment can be obtained by arranging the heat insulating portion 35 at a position adjacent to the main shell 10a of the compressor body container 10 inside the accumulator shell 26.

Further, in this embodiment, the case where the accumulator container 25 is formed by the cup-shaped accumulator shell 26 having an opening formed at one end side (opening side 26a) is illustrated, but for example, the accumulator container 25 is formed by the accumulator shell 26. The compressor may further include a lid member that closes the opening side 26a, and the upper surface side of this lid member may be joined to the bottom shell 10c of the compressor main body container 10. Even in such a case, by providing the heat insulating portion 35 formed between the partition member 28 and the lid member of the accumulator container 25, the same effects as in this embodiment can be obtained.

In addition, in this embodiment, the case where the cup-shaped accumulator shell 26 is formed into a cup shape by a single member is illustrated, but the cup-shaped accumulator shell 26 has a dish-shaped end at the end of the cylindrical member. It may be formed into a cup shape by joining these members by welding.

Further, the rotary compressor of the present disclosure is not limited to a so-called one-cylinder rotary compressor having one cylinder, but may be applied to a so-called two-cylinder rotary compressor having two cylinders. Further, in this embodiment, a rotary compressor has been described as an example, but the present invention may be applied to other compressors such as a scroll compressor, and the same effects as in this embodiment can be obtained.

1 Rotary compressor (hermetic compressor)
10 Compressor main body container 10c Bottom shell 11 Motor 12 Compression section 25 Accumulator container 26 Accumulator shell 26a Opening side (upper end)
26b Main shell 26c Bottom shell 28 Partition member 35 Heat insulation part 35a Heat insulation space 36 Accumulator part 36a Accumulator part internal space 37 Penetration port 38 Connection pipe 39 Closure part 48 Connection pipe 49 Sealing valve 50 Piping 104 Suction pipe 107 Discharge pipe

Claims (7)

a vertically placed cylindrical compressor main body container provided with a refrigerant discharge pipe and a suction pipe; an accumulator container connected to the suction pipe; A hermetic compressor, comprising: a compression section that compresses refrigerant sucked in through a pipe and discharges it from the discharge pipe; and a motor that is disposed inside the compressor body container and drives the compression section. ,
the accumulator container is joined to the compressor main body container,
A partition member is provided inside the accumulator container to partition the inside into a heat insulating part and an accumulator part,
The heat insulating part is formed between the partition member and the compressor main body container, and has a heat insulating space that blocks heat transfer from the compressor main body container to the accumulator part,
The accumulator container is provided with a through hole that connects the heat insulating space with the outside of the compressor main body container,
In the hermetic compressor, the through hole is closed so that the adiabatic space is under negative pressure. The accumulator container has a cup-shaped accumulator shell with an opening formed at one end, and the opening side of the accumulator shell is joined to the compressor main body container.
The hermetic compressor according to claim 1. A connecting pipe is provided in the through hole,
The hermetic compressor according to claim 1 or claim 2. The through hole is closed by sealing the connecting pipe on the outside of the accumulator container.
The hermetic compressor according to claim 3. the connecting pipe has a sealing valve;
The hermetic compressor according to claim 3 or 4. A method for manufacturing a hermetic compressor according to claim 3, comprising:
Connecting the connecting pipe to a refrigeration circuit to which the hermetic compressor is connected,
A method for manufacturing a hermetic compressor, in which the adiabatic space is made to have a negative pressure by evacuation through the connecting pipe. closing the through hole by sealing the connecting pipe outside the accumulator container;
A method for manufacturing a hermetic compressor according to claim 6.

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