JP2008039222A - Oil separator and compressor for cold storage unit-type refrigerating machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent damage of a welding portion and deformation of an upper cover body by preventing displacement of a filter element in a shell even under the application of vibration and external force during transportation and the like, with respect to an oil separator and a compressor for a cold storage unit-type refrigerating machine, having the filter element for capturing an oil included in a refrigerant gas. <P>SOLUTION: This oil separator is composed of the filter element 36 having a filter member 37 for capturing the oil included in the refrigerant, the upper cover body 38 adhered to an upper portion of the filter member 37, a lower cover body 39 adhered to a lower portion of the filter member 37, and a high-pressure introduction pipe 15A welded to the upper cover body 38, and a shell 35 composed of a cylindrical portion 35A, an upper flange 35B and a lower flange 35C, and provided with the filter element 36 inside, a fixing member 50 is disposed to fix the filter element 36 in the shell 35. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an oil separator and a compressor for a regenerator refrigerator, and more particularly to an oil separator having a filter element for collecting oil contained in a refrigerant and a compressor for a regenerator refrigerator.

  There are various types of regenerative refrigerators, such as Gifford McMahon refrigerators (hereinafter referred to as GM refrigerators), jurtmusson + GM refrigerators, closed cycle refrigerators, Stirling refrigerators, etc. In general, many GM refrigerators are used. This GM refrigerator is connected to a compressor for a regenerator type refrigerator (hereinafter simply referred to as a compressor), and a high-pressure refrigerant gas (generally helium gas) supplied from the compressor is pressurized in the refrigerator. It is set as the structure which carries out the freezing process using the cold obtained by carrying out adiabatic expansion to low pressure from this.

  The compressor performs a process of increasing the pressure of the low-pressure refrigerant gas (return gas) returned from the GM refrigerator in the compressor body and supplying it to the GM refrigerator again as a supply gas. The return gas returned from the GM refrigerator is boosted again by the compressor body, and the boosted refrigerant (supply gas) is cooled by the refrigerant gas heat exchange unit.

  The refrigerant gas that has undergone the cooling process is sent to the oil separator for oil-liquid separation (an example of the oil separator is shown in Patent Document 1). Then, the refrigerant gas subjected to the gas-liquid separation is sent to the adsorber, and then supplied to the GM refrigerator as a supply gas.

  5 to 7 show an example of a conventional oil separator 115. The oil separator 115 is generally composed of a shell 135 and a filter element 136.

  The shell 135 includes a cylindrical portion 135A, an upper flange 135B, a high-pressure side discontinuation 115B, and an oil return pipe 115C. The cylindrical portion 135A accommodates an oil separation element 136, which will be described later, and has a hollow cylindrical shape. A high-pressure side pipe 115B is fixed to the upper flange 135B by welding. The upper flange 135B is fixed with a high-pressure gas introduction pipe 115A, a high-pressure gas outlet pipe 115B, and an oil return pipe 115C by welding.

  The high-pressure gas introduction pipe 115A is connected to the compressor main body, and high-pressure refrigerant gas that has been pressurized by the compressor main body and cooled by the heat exchange unit is introduced. The high pressure gas outlet pipe 115B is connected to an adsorber, and the refrigerant gas separated by the filter element 136 is led out from the oil separator 115 through the high pressure gas outlet pipe 115B.

  The upper end of the oil return pipe 115C is connected to the compressor. The introduction opening 156 provided at the lower end of the oil return pipe 115C is opened near the bottom of the oil separator 115. Oil separated by the filter element 136 is accumulated at the bottom of the oil separator 115, and the separated oil is returned to the compressor via the oil return pipe 115C and a return pipe connected thereto. . The return pipe is provided with a filter that collects dust contained in the separated oil.

  The filter element 136 includes a high-pressure gas introduction tube 115A, a filter member 137, an upper lid 138, a lower lid 139, and the like, as shown in an enlarged manner in FIGS.

  The filter member 137 has a structure in which glass wool is wound around a core of a punching plate and a punching plate is disposed on the outermost periphery. An upper lid 138 is fixed to the upper end of the filter member 137 using an adhesive, and a lower lid 139 is fixed to the lower end of the filter member 137 using an adhesive.

  At this time, it is necessary to provide a thick adhesive so that the glass wool fibers are not exposed to the outside as dust, and the high-pressure refrigerant gas to be introduced appropriately passes through the filter member 137. If the amount of adhesive applied is insufficient, glass wool fibers enter the return pipe, clogging the filter provided in the return pipe, and the oil separated by the oil separator 115 returns to the compressor. There is a risk of not being in a state. In addition, when a thin portion is present in the adhesive, when a high-pressure refrigerant gas is applied, a crack or the like occurs in the thin portion, and the refrigerant gas containing oil does not pass through the filter member 137 and thus the high-pressure gas. There is a possibility that the oil separator 115 may flow out through the outlet tube 115B.

  In order to prevent these, the upper lid body 138 and the lower lid body 139 are provided with flange portions 138a and 139a. By forming the flanges 138a and 139a, it is possible to widen the adhesive application region between the filter member 137 and the upper lid 138 and between the filter member 137 and the lower lid 139. As a result, it is possible to prevent the glass wool fibers constituting the filter member 137 from entering the oil separator 115, and to appropriately introduce a high-pressure refrigerant gas into the filter member 137. The flanges 138a and 139a are integrally formed when the upper lid 138 and the lower lid 139 are processed by drawing.

  By adhering using an adhesive as described above, the filter member 137, the upper lid body 138, and the lower lid body 139 are integrated. The integrated filter member 137, upper lid 138, and lower lid 139 are fixed to the high-pressure gas introduction tube 115A by welding the upper lid 138 to the high-pressure gas introduction tube 115A.

  As shown in FIG. 7, a curved portion 138b is formed at a position where the upper lid 138 is welded to the high-pressure gas introduction tube 115A. Thus, by forming the curved portion 138b at the welding position of the upper lid 138, the welding area can be expanded, and more reliable welding can be performed. In FIG. 7, reference numeral 162 denotes a welded portion.

Conventionally, the oil separation element 136 configured as described above is configured to be fixed to the shell 135 by fixing the high-pressure gas introduction pipe 115A to the upper flange 115B by welding. A portion denoted by reference numeral 142 in FIG. 5 is a welded portion between the high-pressure gas introduction tube 115A and the upper flange 115B.
JP 2006-029684 A

  However, as shown in FIG. 5, the conventional oil separator 115 has a structure in which the filter element 136 is fixed to the shell 135 only by welding the high-pressure gas introduction pipe 115A to the upper flange 115B. . For this reason, when a vibration or external force is applied when the compressor provided with the oil separator 115 is conveyed, the filter element 136 is centered on the welded portion 162 between the high-pressure gas introduction pipe 115A and the upper lid 138. And an excessive stress is applied to the welded portion 162.

  Therefore, in the conventional oil separator 115, there is a possibility that the welded portion 162 between the high-pressure gas introduction pipe 115A and the upper lid body 138 may be damaged or the upper lid body 138 may be deformed during transportation. There was a problem. As described above, when the welded portion 162 is damaged or the upper lid 138 is deformed, glass wool fibers constituting the filter member 137 are mixed into the oil from this portion, or high-pressure refrigerant gas leaks from the damaged and deformed portion. I will.

  As a configuration for avoiding this, it is conceivable to increase the mechanical strength of the upper lid 138 or to increase the strength of the welded portion 162. However, if the plate thickness is increased in order to increase the mechanical strength of the upper lid body 138, the collar portion 138a cannot be deep drawn. Further, when trying to cut the collar portion 138a by cutting, there is a problem that the material cost and the processing cost are significantly increased.

  Further, as a method for increasing the strength of the welded portion 162, it is conceivable to increase the curvature of the curved portion 138b and widen the welding area. However, in this configuration, there is a problem in that the separation distance between the upper surface of the filter member 137 and the upper lid 138 becomes large in the welded portion 162, and high-pressure refrigerant gas leaks from this portion.

  The present invention has been made in view of the above points, and prevents displacement of the filter element within the shell even when vibration and external force are applied during transportation, etc., and damage to the welded portion or deformation of the upper lid body. It is an object to provide an oil separator and a regenerator type compressor for a refrigerating machine that can suppress the generation of the above.

  In order to solve the above-described problems, the present invention is characterized by the following measures.

The invention described in claim 1
A filter material that captures oil contained in the refrigerant, an upper lid that is bonded to the upper portion of the filter material, a lower lid that is bonded to the lower portion of the filter material, and the refrigerant that is bonded to the upper lid A filter element having an introduction pipe for flowing the gas into the filter material;
In an oil separator comprising an upper flange portion, a lower flange portion, and a cylindrical portion, the filter element is mounted inside, and the introduction pipe is provided with a shell fixed to the upper flange.
A fixing member for fixing the filter element in the shell is provided.

The invention according to claim 2
The oil separator according to claim 1, wherein
The fixing member has a mounting portion to be attached to the filter element and an engaging portion for fixing the filter element in the shell by engaging with an inner wall of the shell. .

The invention according to claim 3
The engaging portion is engaged with a lower flange portion of the shell.

The invention according to claim 4
The oil separator according to claim 2,
The engaging portion is engaged with a cylindrical portion of the shell.

The invention according to claim 5
In the oil separator according to any one of claims 1 to 4,
The upper lid is provided with a reinforcing member.

Further, the invention described in claim 6
The oil separator according to claim 5,
The reinforcing member is welded to the introduction pipe.

A compressor according to the invention of claim 7 is
An oil separator according to any one of claims 1 to 6 is provided.

  According to the present invention, since the filter element is fixed by the fixing member in the shell, even if an external force or vibration is applied to the oil separator by transportation or the like, the joining position of the upper lid and the introduction pipe It is possible to prevent damage to the cover and deformation of the upper lid.

  Further, by providing a reinforcing member on the upper lid, the mechanical strength of the upper lid can be substantially increased while maintaining the thickness of the upper lid itself at a thickness that allows drawing processing, It is possible to prevent the upper lid body from being deformed when the external force or vibration is applied.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 shows a compressor 10 for a regenerator type refrigerator (hereinafter referred to as a compressor) that is an embodiment of the present invention. The compressor 10 is connected to the GM refrigerator 30 by a supply pipe 22 and a return pipe 23.

  The compressor 10 pressurizes the low-pressure refrigerant gas returned from the GM refrigerator 30 via the return pipe 23 (this refrigerant gas is referred to as return gas) by the compressor body 11 and again as supply gas via the supply pipe 22. The process which supplies to the GM refrigerator 30 is performed. The compressor 10 generally includes a compressor body 11, a heat exchanger 12, a high-pressure side pipe 13, a low-pressure side pipe 14, an oil separator 15, an adsorber 16, a storage tank 17, a bypass mechanism 18, and the like.

  The return gas returned from the GM refrigerator 30 first flows into the storage tank 17 via the return pipe 23. The function of the storage tank 17 is to remove pulsations contained in the return gas. Since the main body 38 constituting the storage tank 17 has a relatively large capacity, pulsation can be removed by introducing return gas into the main body 38.

  The return gas from which pulsation has been removed by the storage tank 17 is led out to the low-pressure side pipe 14. The low-pressure side pipe 14 is connected to the compressor body 11, and thus the return gas from which pulsation has been removed in the storage tank 17 is supplied to the compressor body 11.

  The compressor body 11 is, for example, a scroll-type or rotary-type pump, and has a function of increasing the pressure of the return gas (the refrigerant gas whose pressure has been increased by the compressor body 11 is referred to as supply gas). The compressor body 11 sends the pressurized supply gas to the high-pressure side pipe 13A. When the pressure is increased by the compressor main body 11, the supply gas is sent out to the high-pressure side pipe 13A in a state where oil in the compressor main body 11 is slightly mixed.

  The compressor body 11 is configured to cool using oil. For this reason, the oil cooling pipe 33 that circulates oil is configured to be connected to the oil heat exchanging section 26 that constitutes the heat exchanger 12. The oil cooling pipe 33 is provided with an orifice 32 that controls the flow rate of oil flowing inside.

  The heat exchanger 12 is configured so that cooling water circulates through the cooling water pipe 25, and an oil heat exchanging unit 26 that cools oil flowing through the oil cooling pipe 33 and a refrigerant gas heat exchanging unit that cools the supply gas. 27. The oil flowing in the oil cooling pipe 33 in the oil heat exchanging section 26 is heat-exchanged and cooled, and the supply gas flowing in the high-pressure side pipe 13A is heat-exchanged and cooled in the refrigerant gas heat exchanging section 27.

  The supply gas pressurized by the compressor body 11 and cooled by the refrigerant gas heat exchange unit 27 is supplied to the oil separator 15 through the high-pressure side pipe 13A. The oil separator 15 separates the oil contained in the supply gas from the refrigerant and removes impurities and dust contained in the oil. For convenience of explanation, a detailed description of the configuration of the oil separator 15 will be described later.

  The supply gas from which oil has been removed by the oil separator 15 is sent to the adsorber 16 through the high-pressure side pipe 13B. The adsorber 16 has a function of removing a particularly vaporized oil component contained in the supply gas. Then, when the oil component evaporated in the adsorber 16 is removed, the supply gas is led out to the supply pipe 22, and thereby supplied to the GM refrigerator 30.

  The bypass mechanism 18 includes a bypass pipe 19, a high pressure side pressure detection device 20, and a bypass valve 21. The bypass pipe 19 is a pipe that communicates the high pressure side through which the supply gas of the compressor 10 flows and the low pressure side through which the return gas flows. The high pressure side pressure detection device 20 detects the pressure of the supply gas in the high pressure side pipe 13A. The bypass valve 21 is an electric valve device that opens and closes the bypass pipe 19. Further, although the bypass valve 21 is a normally closed valve, it is configured to be driven and controlled by the high pressure side pressure detector 20.

  Specifically, when the high-pressure side pressure detection device 20 detects that the pressure of the supply gas from the compressor body 11 to the oil separator 15 (that is, the pressure in the high-pressure side pipe 13A) is equal to or higher than a predetermined pressure, The bypass valve 21 is driven and opened by the high pressure side pressure detection device 20. As a result, supply gas having a predetermined pressure or higher is prevented from being supplied to the refrigerator 30.

  Next, the oil separator 15 will be described. 2 to 4 are sectional views showing an oil separator 15 according to an embodiment of the present invention. The oil separator 15 is roughly constituted by a shell 35 and a filter element 36.

  The shell 35 includes a cylindrical portion 35A, an upper flange 35B, and a lower flange 35C. The cylindrical portion 35A has a hollow cylindrical shape. A lower flange 35C is fixed to the lower end portion of the cylindrical portion 35A by welding, and is thus hermetically sealed. Further, an upper flange 35B is fixed to the upper end portion of the cylindrical portion 35A by welding, so that the structure is airtightly closed.

  The upper flange 35B is provided with a high-pressure gas introduction pipe 15A, a high-pressure gas lead-out pipe 15B, and an oil return pipe 15C. The high-pressure gas introduction pipe 15A is connected to the high-pressure side pipe 13A, so that the supply gas pressurized by the compressor body 11 is introduced.

  The high pressure gas outlet pipe 15B is connected to the high pressure side pipe 13B. The high-pressure side pipe 13 </ b> B is a pipe that connects the oil separator 15 and the adsorber 16. An oil return port 15C is connected to the upper end of the oil return pipe 15C. The introduction opening 56 provided at the lower end of the oil return pipe 15 </ b> C opens near the bottom of the oil separator 15.

  The oil return port 15C is connected to the oil return pipe 24. The oil return pipe 24 has a high pressure side connected to the oil separator 15 and a low pressure side connected to the low pressure side pipe 14. Further, a filter 43 for removing dust contained in the oil separated by the oil separator 15 and an orifice 31 for controlling the return amount of the oil are provided in the middle of the oil return pipe 24.

  3 and 4, the filter element 36 includes a high-pressure gas introduction pipe 15A, a filter member 37, an upper lid 38, a lower lid 39, a fixing member 50, a reinforcing plate 60, and the like. Has been.

  The filter member 37 has a structure in which glass wool is wound around the core of the punching plate 41 and the punching plate 40 is disposed on the outermost periphery. An upper lid 38 is fixed to the upper end portion of the filter member 37 using an adhesive (not shown), and a lower lid body 39 is fixed to the lower end portion using an adhesive.

  Further, the upper lid body 38 and the lower lid body 39 are formed with flange portions 38a and 39a. By forming the flange portions 38 a and 39 a, it is possible to widen the adhesive application region between the filter member 37 and the upper lid body 38 and between the filter member 37 and the lower lid body 39. Accordingly, it is possible to prevent the glass wool fibers constituting the filter member 37 from entering the oil separator 15 and to appropriately introduce the high-pressure refrigerant gas into the filter member 37. The flanges 38a and 39a are integrally formed when the upper lid 38 and the lower lid 39 are processed by drawing.

  By adhering using an adhesive as described above, the filter member 37, the upper lid body 38, and the lower lid body 39 are integrated. The integrated filter member 37, upper lid body 38, and lower lid body 39 are fixed to the high-pressure gas introduction tube 15A by welding the upper lid body 38 to the high-pressure gas introduction tube 15A. A reference numeral 62 in FIG. 4 indicates a welded portion between the upper lid 38 and the high-pressure gas introduction pipe 15A.

  In order to firmly weld the upper lid body 38 and the high-pressure gas introduction pipe 15A, it is desirable to bend the welded portion 62 of the upper lid body 38 so as to increase the welding area. There is a possibility that the refrigerant gas leaks from the weld 62. Further, when the upper lid 38 is to be formed by using the drawing process in which the flange portions 38a and 39a are formed with good workability and low processing cost, it is necessary to reduce the plate thickness. In order to increase the mechanical strength, it is necessary to increase the plate thickness of the upper lid 38. For this reason, in this embodiment, the reinforcing plate 60 is provided above the upper lid 38.

  The reinforcing plate 60 is, for example, a highly rigid metal disk such as stainless steel, and is fixed to the upper portion of the upper lid 38 by using an adhering means such as adhesion or welding. As shown in FIG. 4, in the present embodiment, the upper lid 38 is welded to the high pressure gas introduction pipe 15A at the weld 62 (the weld is indicated by reference numeral 62 in FIG. 4), and the high pressure gas introduction pipe is used. 15A and the reinforcing plate 60 are also welded at the welded portion 61.

  Thus, in this embodiment, since the high pressure gas introduction pipe 15A and the upper lid 38 are welded at a plurality of locations, reliable welding can be performed. Therefore, even if an external force or vibration is applied by conveyance or the like, the welded portion 62 between the high-pressure gas introduction tube 15A and the upper lid 38 is not damaged, and the reliability of the oil separator 15 can be improved. .

  Further, by providing the reinforcing plate 60 on the upper lid 38, the reinforcing plate 60 prevents the upper lid 38 from being deformed. For this reason, the plate thickness of the upper lid 38 is reinforced by the reinforcing plate 60 even if the rib portions 38a, 39a are made thin so that the upper lid 38 can be drawn, so that even if external force or vibration is applied as described above, The body 38 is not deformed. Further, deep drawing can be performed as compared with the conventional case, and the widths of the flange portions 38a and 39a can be increased. Therefore, the application amount of the adhesive can be set to the optimum amount, and this can prevent the refrigerant gas from leaking.

  Further, conventionally, the curved portion 138b (see FIG. 7) is formed in the upper lid body 138 in order to increase the welding area of the welded portion 162. However, in this embodiment, the curved portion is not provided in the upper lid body 38. Further, it is possible to improve the bondability with the high-pressure gas introduction pipe 15A. Therefore, it is possible to prevent the refrigerant gas from leaking out.

  Next, the fixing member 50 will be described. The fixing member 50 has a function of fixing the filter element 36 so as not to be displaced in the shell 35, and is formed of a metal material such as stainless steel or iron. In this embodiment, the three fixing members 50 are arranged on the filter element 36 at intervals of 120 ° in plan view (see FIG. 3A). Note that the number of the fixing members 50 is not limited to three, but can be more or less than this.

  The fixing member 50 includes a mounting portion 51, side engaging portions 52a and 52b, a bottom engaging portion 53, and the like. The mounting portion 51 is a plate-like member having a length substantially equal to the length of the filter member 37 in the longitudinal direction (the vertical direction in FIGS. 2, 3B, and 4). An arm portion 51a is formed on the upper portion of the mounting portion 51, and an arm portion 51b is formed on the lower portion. The arm portion 51 a is configured to engage with the upper lid body 38, and the arm portion 51 b is configured to engage with the lower lid body 39. More specifically, the arm members 51a and 51b formed on the upper and lower sides of the mounting portion 51 sandwich the upper and lower sides of the filter member 37 (between the upper lid body 38 and the lower lid body 39), so that the fixing member 50 is a filter. Mounted on the element 36. The arm portions 51a and 51b may be fixed to the upper lid body 38 and the lower lid body 39 by welding.

  Further, side portion engaging portions 52 a and 52 b extending to the side are formed on the upper and lower portions of the fixing member 50. The side engaging portions 52a and 52b extend toward the 45 inner wall of the shell 35 (the inner wall 45 of the cylindrical portion 35A) and engage with the inner wall 45 in a state where the fixing member 50 is attached to the filter element 36. It is configured as follows. Further, the fixing member 50 is formed with a bottom engaging portion 53 that extends further downward from the position where the arm portion 51b is formed. The bottom engaging portion 53 is configured to engage (contact) the upper surface 46 of the lower flange 35C in a state where the filter element 36 is mounted in the shell 35. The bottom engaging portion 53 and the lower flange 35C may be fixed by welding.

  When the filter element 36 to which the fixing member 50 having the above-described configuration is mounted is mounted in the shell 35, the side engaging portions 52 a and 52 b of the fixing member 50 are engaged with the inner wall 45 of the shell 35 as shown in FIG. 2. The bottom engaging portion 53 is in contact with the upper surface 46 of the lower flange 35C. Further, the fixing member 50 is configured to be mounted on the filter element 36 by the mounting portion 51. Therefore, the position of the filter element 36 is restricted by the fixing member 50 in the shell 35, and the displacement thereof is restricted.

  Accordingly, even if an external force or vibration is applied to the oil separator 15 by conveying the compressor 10 having the oil separator 15, the filter element 36 is not displaced in the shell 35. Therefore, it is possible to suppress the stress from being applied to the welded portion 62 between the high-pressure gas introducing tube 15A and the upper lid 38 and the welded portion 61 between the high-pressure gas introducing tube 15A and the reinforcing plate 60. It is possible to prevent damage from occurring. Thereby, the reliability of the oil separator 15 can be improved.

FIG. 1 is a block diagram showing a compressor according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing an oil separator according to an embodiment of the present invention. FIG. 3 is a cross-sectional view showing an oil separation element of the oil separator shown in FIG. 4 is an enlarged cross-sectional view of the vicinity of the upper lid in FIG. FIG. 5 is a cross-sectional view showing an oil separator which is a conventional example. 6 is a cross-sectional view showing an oil separation element of the oil separator shown in FIG. FIG. 7 is an enlarged cross-sectional view showing the vicinity of the upper lid in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Compressor 12 Heat exchanger 13 High pressure side pipe 14 Low pressure side pipe 15 Oil separator 15A High pressure gas introduction pipe 15B High pressure gas outlet pipe 15C Oil return pipe 18 Bypass mechanism 22 Supply pipe 23 Return pipe 24 Oil return pipe 30 Refrigeration Machine 35 Shell 35A Cylindrical part 35B Upper flange 35C Lower flange 36 Filter element 37 Filter member 38 Upper lid 38a, 39a Ridge part 39 Lower lid 42, 61, 62 Welding part 50 Fixing member 51 Mounting part 51a, 51b Arm part 52a 52b Side engaging portion 53 Bottom engaging portion 60 Reinforcing plate

Claims (7)

A filter material that captures oil contained in the refrigerant, an upper lid that is bonded to the upper portion of the filter material, a lower lid that is bonded to the lower portion of the filter material, and the refrigerant that is bonded to the upper lid A filter element having an introduction tube for introducing the filter material into the filter material;
In an oil separator comprising an upper flange part, a lower flange part, and a cylindrical part, the filter element is mounted inside, and the shell in which the introduction pipe is fixed to the upper flange,
An oil separator comprising a fixing member for fixing the filter element in the shell.   2. The fixing member according to claim 1, further comprising: a mounting portion that is mounted on the filter element; and an engaging portion that fixes the filter element in the shell by engaging with an inner wall of the shell. The oil separator described.   The oil separator according to claim 2, wherein the engaging portion is engaged with a lower flange portion of the shell.   The oil separator according to claim 2, wherein the engaging portion is engaged with a cylindrical portion of the shell.   The oil separator according to any one of claims 1 to 4, wherein a reinforcing member is provided on the upper lid.   The oil separator according to claim 5, wherein the reinforcing member is welded to the introduction pipe. In the compressor for a regenerator type refrigerator that supplies refrigerant to the regenerator type refrigerator,
A compressor for a regenerator type refrigerating machine, comprising the oil separator according to any one of claims 1 to 6.

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