Compressor and refrigeration cycle device

Abstract

The utility model provides a kind of compressor and refrigeration cycle device capable of inhibiting the generation of action badness. The compressor of the embodiment has a compression mechanism, a motor and a housing. The housing has a cylindrical main housing and a bowl-shaped end housing. The main housing and the end housing each have a fitting portion that overlaps when viewed radially from the main housing. The outer side of the radial direction of the main housing is designated as a first side, and the inner side of the radial direction is designated as a second side. In the fitting portion of the main housing and the fitting portion of the end housing, one side disposed on the first side is designated as a first fitting portion, and one side disposed on the second side is designated as a second fitting portion. The front end side of the axial direction of the first fitting portion is designated as a third side, and the base end side of the axial direction of the first fitting portion is designated as a fourth side. The housing has a space separated from the inner portion of the housing at the end of the fourth side between the first fitting portion and the second fitting portion.

Description

Technical Field

[0001] The embodiments of this utility model relate to compressors and refrigeration cycle devices. Background Technology

[0002] In a refrigeration cycle system, a compressor is used to compress a refrigerant. The compressor includes a compression mechanism, an electric motor, and a housing. The compression mechanism compresses the refrigerant. The electric motor drives the compression mechanism. The housing houses the compression mechanism and the electric motor.

[0003] The compressor is required to suppress malfunctions such as poor lubrication of the compression mechanism and poor insulation of the motor.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2009-191765 Utility Model Content

[0007] The problem to be solved by the utility model

[0008] The problem to be solved by this utility model is to provide a compressor and a refrigeration cycle device that can suppress the occurrence of malfunctions.

[0009] Methods for solving problems

[0010] The compressor of Embodiment 1 includes a compression mechanism, an electric motor, and a housing. The compression mechanism compresses gas. The electric motor drives the compression mechanism. The housing houses the compression mechanism and the electric motor. The housing has a cylindrical main housing and a cup-shaped end housing. The end housing covers an opening at the axial end of the main housing and engages with the main housing. The main housing and the end housing each have overlapping fitting portions when viewed radially from the main housing. The radially outer side of the main housing is designated as a first side, and the radially inner side is designated as a second side. In the fitting portions of the main housing and the end housing, the one located on the first side is designated as a first fitting portion, and the one located on the second side is designated as a second fitting portion. The axially front end side of the first fitting portion is designated as a third side, and the axially base end side of the first fitting portion is designated as a fourth side. The end of the housing on the fourth side between the first fitting portion and the second fitting portion has a space that separates from the interior of the housing.

[0011] The compressor of embodiment 2 is based on the compressor described in embodiment 1. The housing has a stepped portion on the inner periphery of the first fitting portion. The inner diameter of the stepped portion is larger than the fourth side of the first fitting portion, and the end of the fourth side of the first fitting portion has a stepped surface.

[0012] The end face of the fourth side of the second fitting part abuts against the stepped surface.

[0013] The compressor of embodiment 3 is based on the compressor described in embodiment 2. The second fitting portion has a chamfer at the corner on the fourth side of its outer periphery. The space includes a first space formed between the chamfer and the first fitting portion.

[0014] The compressor of embodiment 4 is based on the compressor described in embodiment 2 or 3. The first fitting portion has a recessed portion at its end on the fourth side of the stepped portion, which is recessed towards the first side. The space includes a second space formed between the recessed portion and the second fitting portion.

[0015] The compressor of embodiment 5 is based on the compressor described in embodiment 2 or 3. The first fitting portion has a pocket portion recessed to a fourth side at its end on the first side of the stepped surface. The space includes a third space formed between the pocket portion and the second fitting portion.

[0016] The compressor of embodiment 6 is based on any one of embodiments 3 to 5. The stepped portion has a groove recessed towards the first side at the middle portion in the axial direction.

[0017] The refrigeration cycle apparatus of the embodiment includes: a compressor as described in any one of methods 1 to 6; a radiator connected to the compressor; an expansion device connected to the radiator; and a heat absorber connected between the expansion device and the compressor. Attached Figure Description

[0018] Figure 1 It is a circuit diagram of the refrigeration cycle device and a side view of the compressor.

[0019] Figure 2 This is a cross-sectional view of the first fitting part in the first embodiment.

[0020] Figure 3 yes Figure 1 The enlarged view of section E is a cross-sectional view of the first and second fitting parts in their fitting state.

[0021] Figure 4 This is a cross-sectional view of the first fitting part in the second embodiment.

[0022] Figure 5 It is a cross-sectional view of the first and second fitting parts in their fitting state.

[0023] Figure 6 This is a cross-sectional view of the first fitting part in the third embodiment.

[0024] Figure 7 It is a cross-sectional view of the first and second fitting parts in their fitting state.

[0025] Figure 8This is a cross-sectional view of the first fitting part of a modified example of the third embodiment.

[0026] Figure 9 It is a cross-sectional view of the first and second fitting parts in their fitting state.

[0027] Figure 10 This is a cross-sectional view of the first fitting part in the fourth embodiment.

[0028] Figure 11 It is a cross-sectional view of the first and second fitting parts in their fitting state. Detailed Implementation

[0029] Hereinafter, the compressor and refrigeration cycle device of the embodiment will be described with reference to the accompanying drawings.

[0030] Figure 1 This is a circuit diagram of the refrigeration cycle unit 1 and a side view of the compressor 90. The refrigeration cycle unit 1 includes a compressor 90, a four-way valve 3, a first heat exchanger 4, an expansion device 5, a second heat exchanger 6, and a refrigerant flow path 8 that allows refrigerant to flow relative to them. The refrigerant circulates in the refrigeration cycle unit 1 while undergoing a phase change.

[0031] The compressor 90 compresses the low-pressure gaseous refrigerant drawn into it, transforming it into a high-temperature, high-pressure gaseous refrigerant. A liquid receiver (gas-liquid separator) 2b is located upstream of the compressor 90. The liquid receiver 2b separates the gaseous and liquid phases of the refrigerant, supplying the gaseous refrigerant to the compressor 90.

[0032] The four-way valve 3 reverses the flow direction of the refrigerant in the refrigerant flow path 8 of the first heat exchanger 4, the expansion device 5, and the second heat exchanger 6. When the four-way valve 3 is in... Figure 1 In this state, the refrigerant discharged from the compressor 90 flows in the order of the first heat exchanger 4, the expansion device 5, and the second heat exchanger 6. At this time, the first heat exchanger 4 functions as a condenser (radiator), and the second heat exchanger 6 functions as an evaporator (heat absorber).

[0033] When the four-way valve 3 is from Figure 1 When the state changes, the refrigerant discharged from the compressor 90 flows in the order of the second heat exchanger 6, the expansion device 5, and the first heat exchanger 4. At this time, the second heat exchanger 6 functions as a condenser (radiator), and the first heat exchanger 4 functions as an evaporator (heat absorber).

[0034] The condenser dissipates heat from the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 90, transforming the high-temperature, high-pressure gaseous refrigerant into a high-pressure liquid refrigerant.

[0035] The expansion device 5 reduces the pressure of the high-pressure liquid refrigerant supplied from the condenser, transforming the high-pressure liquid refrigerant into a low-temperature, low-pressure gas-liquid two-phase refrigerant. For example, the expansion device 5 is an expansion valve.

[0036] The evaporator transforms the gas-liquid two-phase refrigerant fed from the expansion unit 5 into a low-pressure gaseous refrigerant. In the evaporator, the low-pressure gaseous two-phase refrigerant absorbs heat of vaporization from its surroundings as it vaporizes, thereby cooling the surrounding area. The low-pressure gaseous refrigerant that has passed through the evaporator is then drawn into the interior of the compressor 90 via the receiver 2b.

[0037] Thus, in the refrigeration cycle device 1, the refrigerant, serving as the working fluid, circulates while undergoing a phase change between gas and liquid. The refrigerant dissipates heat during its transition from gas to liquid and absorbs heat during its transition from liquid to gas. The refrigeration cycle device 1 utilizes the heat dissipation or absorption of the refrigerant for heating, cooling, defrosting, and other functions.

[0038] The compressor 90 includes a compression mechanism 92, an electric motor 93, and a housing 30. The compression mechanism 92 compresses the refrigerant. The electric motor 93 drives the compression mechanism 92. The housing 30 houses the compression mechanism 92 and the electric motor 93.

[0039] The shell 30 has a main shell 10, an upper shell (end shell) 20, and a lower shell (end shell) 38. The main shell 10 is formed into a cylindrical shape from a material such as steel pipe.

[0040] In this application, the Z-direction and R-direction of the cylindrical coordinate system are defined as follows. The Z-direction is the axial direction of the main housing 10. The +Z side is the upper housing 20 side of the main housing 10. The -Z side is the opposite side of the +Z side. For example, the Z-direction is the vertical direction, the +Z side is the upper side, and the -Z side is the lower side. The R-direction is the radial direction of the main housing 10. The +R side (first side) is the outer side of the R-direction, and the -R side (second side) is the inner side of the R-direction. For example, the R-direction is the horizontal direction.

[0041] The upper shell 20 is formed into a bowl shape by deep drawing or other processes of steel sheet material. The upper shell 20 covers the opening at the +Z side end of the main shell 10 and is joined to the main shell 10.

[0042] The lower housing 38 is formed in the same manner as the upper housing 20. The lower housing 38 covers the opening at the -Z side end of the main housing 10 and engages with the main housing 10. Alternatively, the lower housing 38 may be integrally formed with the main housing 10 as part of the main housing 10. A bracket 39 for fixing the compressor 90 is connected to the lower housing 38.

[0043] Figure 3 yes Figure 1An enlarged view of the cross-section of part E. The end of the upper housing 20 on the -Z side is inserted into the end of the main housing 10 on the +Z side. A fillet weld 31 is formed at the corner between the end face of the main housing 10 on the +Z side and the outer peripheral surface of the upper housing 20. The main housing 10 and the upper housing 20 are joined by welding. Since the upper housing 20 is inserted into the main housing 10 on the -R side, the fillet weld can be actually performed from the +Z side of the main housing 10, making the fillet weld operation easy.

[0044] The main housing 10 and the upper housing 20 each have overlapping fitting portions when viewed from the R direction. The fitting portion located on the +R side is designated as the first fitting portion, and the fitting portion located on the -R side is designated as the second fitting portion. Figure 3 In the example, the fitting portion of the main housing 10 disposed on the +R side is the first fitting portion 12, and the fitting portion of the upper housing 20 disposed on the -R side is the second fitting portion 22. Furthermore, the front end side in the Z direction of the first fitting portion is designated as the third side, and the base end side in the Z direction of the first fitting portion is designated as the fourth side. Figure 3 In the example, the front end side of the first fitting part 12, i.e. the +Z side, is the third side, and the base end side of the first fitting part 12, i.e. the -Z side, is the fourth side.

[0045] (First Implementation)

[0046] Figure 2 This is a cross-sectional view of the first fitting portion 12 in the first embodiment. A stepped portion 34 is formed on the inner periphery of the first fitting portion 12 of the main housing 10. The inner diameter of the stepped portion 34 of the first fitting portion 12 is larger than the inner diameter of the main housing 10 on the -Z side of the first fitting portion 12. A step difference is formed between the inner periphery of the main housing 10 on the -Z side of the first fitting portion 12 and the inner periphery of the stepped portion 34 of the first fitting portion 12. A stepped surface 34e facing the +Z side is formed at the end of the first fitting portion 12 on the -Z side.

[0047] Figure 3 This is a cross-sectional view of the first fitting portion 12 and the second fitting portion 22 in their fitted state. The outer diameter D2 of the second fitting portion 22 is smaller than the inner diameter D1 of the stepped portion 34 of the first fitting portion 12. The second fitting portion 22 is inserted into the -R side of the stepped portion 34 of the first fitting portion 12.

[0048] A C-shaped chamfer (flat chamfer, tapered chamfer) 23 is formed at the corner on the -Z side of the outer periphery of the second fitting portion 22. The magnitude c of the C-shaped chamfer 23 in the R direction is greater than the width e of the step surface 34e in the R direction (refer to...). Figure 2 Small. Therefore, the end face of the second fitting portion 22 on the -Z side abuts against the stepped surface 34e. As a result, the main housing 10 and the upper housing 20 are positioned in the Z direction. Alternatively, an R-shaped chamfer can be formed at the corner of the second fitting portion 22 instead of a C-shaped chamfer 23.

[0049] The housing 30 has a space S at its -Z side end between the first fitting portion 12 and the second fitting portion 22. As mentioned above, the end face of the second fitting portion 22 on the -Z side abuts against the stepped surface 34e. Therefore, the space S is separated from the interior of the housing 30.

[0050] As mentioned above, the second fitting portion 22 of the upper housing 20 is inserted into the -R side of the first fitting portion 12 of the main housing 10. The outer diameter D2 of the second fitting portion 22 is smaller than the inner diameter D1 of the stepped portion 34 of the first fitting portion 12. However, there are cases where the upper housing 20 is inserted into the main housing 10 at an angle relative to the Z direction. For example, the angle α of the upper housing 20 is about 1 to 5°. In addition, since various components are installed on the main housing 10 and the upper housing 20, the roundness of the main housing 10 and the upper housing 20 is not high. Therefore, it is difficult to smoothly insert the upper housing 20 into the main housing 10. There are cases where the upper housing 20 is inserted into the main housing 10 by striking it with a hammer.

[0051] When the upper housing 20 is inserted into the main housing 10 at an angle, the corner of the outer periphery of the second fitting part 22 on the -Z side rubs against the inner peripheral surface of the step part 34 of the first fitting part 12. As a result, iron filings, iron powder, etc. (referred to as iron filings, etc.) are generated. If the generated iron filings, etc., penetrate into the interior of the housing 30, it may cause malfunctions such as poor lubrication of the compression mechanism 92 and poor insulation of the motor 93.

[0052] Iron filings and other debris generated by mutual friction are pressed down by the corner of the second fitting portion 22 and move towards the -Z side along the inner circumferential surface of the step portion 34 of the first fitting portion 12. A space S exists at the -Z side end between the first fitting portion 12 and the second fitting portion 22. Iron filings and other debris that have moved to the -Z side end of the step portion 34 are trapped inside the space S. Since the space S is separated from the interior of the housing 30, the intrusion of iron filings and other debris into the interior of the housing 30 is suppressed. Therefore, the occurrence of malfunctions in the compressor 90 can be suppressed.

[0053] In the first embodiment, the space S is a first space S1 formed between the C-shaped chamfer 23 of the second fitting portion 22 and the first fitting portion 12. The first space S1 is surrounded by the inner peripheral surface and the step surface 34e of the step portion 34 of the first fitting portion 12, and the C-shaped chamfer 23 of the second fitting portion 22. Iron filings and the like generated by the mutual friction between the second fitting portion 22 and the first fitting portion 12 are captured inside the first space S1. The first space S1 separates from the interior of the housing 30, thus suppressing the intrusion of iron filings and the like into the interior of the housing 30. As a result, the occurrence of malfunctions in the compressor 90 can be suppressed.

[0054] As detailed above, the compressor 90 of the first embodiment includes a compression mechanism 92, an electric motor 93, and a housing 30. The compression mechanism 92 compresses gas. The electric motor 93 drives the compression mechanism 92. The housing 30 houses the compression mechanism 92 and the electric motor 93. The housing 30 has a cylindrical main housing 10 and a bowl-shaped upper housing 20. The upper housing 20 covers the opening at the end of the main housing 10 and engages with the Z-direction end of the main housing 10.

[0055] The main housing 10 and the upper housing 20 each have overlapping fitting portions 12 and 22 when viewed radially from the main housing 10. The outer side in the R direction is designated as the +R side, and the inner side in the R direction is designated as the -R side. The fitting portion 12 of the main housing 10 and the fitting portion 22 of the upper housing 20, located on the +R side, are designated as the first fitting portion 12, and the fitting portion 22 located on the -R side is designated as the second fitting portion 22. The front end side (+Z side) of the first fitting portion 12 in the Z direction is designated as the third side, and the base end side (-Z side) of the first fitting portion 12 in the Z direction is designated as the fourth side. The housing 30 has a space S at the end on the fourth side between the first fitting portion 12 and the second fitting portion 22, which is separated from the interior of the housing 30.

[0056] Iron filings are generated through the mutual friction between the first fitting portion 12 and the second fitting portion 22. These iron filings are captured by a space S formed at the fourth side end between the first fitting portion 12 and the second fitting portion 22. Since the space S is separated from the interior of the housing 30, the intrusion of iron filings into the interior of the housing 30 is suppressed. Therefore, malfunctions in the compressor 90 can be suppressed.

[0057] The housing 30 has a stepped portion 34 on the inner periphery of the first fitting portion 12. The inner diameter of the stepped portion 34 is larger than that of the fourth side of the first fitting portion 12, and the end of the fourth side of the first fitting portion 12 has a stepped surface 34e. The end face of the fourth side of the second fitting portion 22 abuts against the stepped surface 34e.

[0058] Thus, space S is separated from the interior of housing 30. Furthermore, the main housing 10 and the upper housing 20 are positioned in the Z direction.

[0059] The second fitting portion 22 has a C-shaped chamfer 23 at the corner on the fourth side of its outer periphery. The space S includes a first space S1 formed between the C-shaped chamfer 23 and the first fitting portion 12.

[0060] Iron filings and other debris generated by the mutual friction between the second fitting portion 22 and the first fitting portion 12 are trapped inside the first space S1. The first space S1 separates from the interior of the housing 30, thus preventing the intrusion of iron filings and other debris into the interior of the housing 30. As a result, it is possible to suppress the occurrence of malfunctions in the compressor 90.

[0061] The refrigeration cycle device 1 of the embodiment includes the aforementioned compressor 90, radiators 4 and 6 connected to the compressor 90, expansion device 5 connected to the radiators 4 and 6, and heat absorbers 6 and 4 connected between the expansion device 5 and the compressor 90.

[0062] The refrigeration cycle unit 1 has a compressor 90 that suppresses malfunctions. As a result, the reliability of the refrigeration cycle unit 1 is increased.

[0063] (Second Implementation)

[0064] Figure 4 This is a cross-sectional view of the first fitting part 12 in the second embodiment. Figure 5 This is a cross-sectional view showing the engaged state of the first engaging portion 12 and the second engaging portion 22. The second embodiment differs from the first embodiment in that it has a recess 13 on the inner circumferential surface of the first engaging portion 12. Sometimes, descriptions of the second embodiment that are similar to the first embodiment are omitted.

[0065] like Figure 4 As shown, the first fitting portion 12 has a recess 13 on the inner circumferential surface of the stepped portion 34. The recess 13 is formed at the end of the stepped portion 34 on the -Z side. The recess 13 is recessed from the inner circumferential surface of the stepped portion 34 towards the +R side. The inner diameter of the bottom surface of the recess 13 is larger than the inner diameter of the stepped portion 34. The recess 13 is formed in a ring shape covering the entire circumference of the first fitting portion 12.

[0066] like Figure 5 As shown, the end of the housing 30 on the -Z side between the first fitting portion 12 and the second fitting portion 22 has a space S that separates from the interior of the housing 30. Space S is the first space S1 of the first embodiment (refer to...). Figure 3 It is formed by combining the first fitting portion 12 with the second fitting portion 22. The second space S2 is the internal space of the recess 13 of the first fitting portion 12, and is formed between the recess 13 and the second fitting portion 22. Alternatively, the C-bevel 23 may not be formed at the corner on the -Z side of the outer periphery of the second fitting portion 22. In this case, the space S only includes the second space S2.

[0067] As mentioned above, iron filings are generated due to the mutual friction between the corner of the second fitting portion 22 and the stepped portion 34 of the first fitting portion 12. The generated iron filings are captured by the space S located at the end of the stepped portion 34 on the -Z side. Since the second space S2 has a large volume, the iron filings are sufficiently captured and are difficult to penetrate into the interior of the housing 30. Therefore, it is possible to suppress the occurrence of malfunctions in the compressor 90.

[0068] As detailed above, the first fitting portion 12 of the second embodiment has a recess 13 recessed toward the +R side at the end of the step portion 34 on the fourth side (-Z side). The space S includes a second space S2 formed between the recess 13 and the second fitting portion 22.

[0069] Iron filings and other debris generated by the mutual friction between the first fitting part 12 and the second fitting part 22 are captured by the second space S2 and are difficult to penetrate into the interior of the housing 30. Therefore, it is possible to suppress the occurrence of malfunctions in the compressor 90.

[0070] (Third Implementation)

[0071] Figure 6 This is a cross-sectional view of the first fitting part 12 in the third embodiment. Figure 7 This is a cross-sectional view showing the fitted state of the first fitting portion 12 and the second fitting portion 22. The third embodiment differs from the first embodiment in that the stepped surface 34e of the first fitting portion 12 has a pocket portion 14a. Sometimes, the description of the third embodiment that is the same as the first embodiment is omitted.

[0072] like Figure 6 As shown, the first fitting portion 12 has a pocket portion 14a at its end on the +R side of the stepped surface 34e. The pocket portion 14a is recessed from the stepped surface 34e towards the -Z side. The depth of the pocket portion 14a in the Z direction is approximately constant in the R direction. The pocket portion 14a is formed in a ring shape covering the entire circumference of the first fitting portion 12.

[0073] like Figure 7 As shown, the end of the housing 30 on the -Z side between the first fitting portion 12 and the second fitting portion 22 has a space S that separates from the interior of the housing 30. Space S is the first space S1 of the first embodiment (refer to...). Figure 3 It is formed by combining the third space S3a with the second fitting portion 22. The third space S3a is the internal space of the bag portion 14a and is formed between the bag portion 14a and the second fitting portion 22. Alternatively, the C-shaped chamfer 23 may not be formed at the corner on the -Z side of the outer periphery of the second fitting portion 22. In this case, the space S only includes the third space S3a.

[0074] Figure 8 This is a cross-sectional view of the first fitting portion 12 in a modified example of the third embodiment. Figure 9 This is a cross-sectional view of the first fitting part 12 and the second fitting part 22 in their fitting state.

[0075] like Figure 8 As shown, the first fitting portion 12 has a pocket portion 14b at its end on the +R side of the stepped surface 34e. The depth of the pocket portion 14b in the Z direction increases from the -R side to the +R side. Figure 9 As shown, the third space S3b is the internal space of the bag portion 14b, and is formed between the bag portion 14b and the second fitting portion 22.

[0076] As mentioned above, iron filings are generated due to the mutual friction between the corner of the second fitting portion 22 and the stepped portion 34 of the first fitting portion 12. These iron filings are captured by the space S located at the -Z side end of the stepped portion 34. Because the third spaces S3a and S3b have large volumes, the iron filings are sufficiently captured and unlikely to penetrate the interior of the housing 30. Therefore, it is possible to suppress malfunctions in the compressor 90.

[0077] As detailed above, the first fitting portion 12 of the third embodiment has pocket portions 14a and 14b recessed toward the fourth side (-Z side) at the end of the step surface 34e on the +R side. The space S includes third spaces S3a and S3b formed between the pocket portions 14a and 14b and the second fitting portion 22.

[0078] Iron filings and other debris generated by the mutual friction between the first fitting part 12 and the second fitting part 22 are captured by the third spaces S3a and S3b, making it difficult for them to penetrate into the interior of the housing 30. Therefore, it is possible to suppress the occurrence of malfunctions in the compressor 90.

[0079] (Fourth Implementation)

[0080] Figure 10 This is a cross-sectional view of the first fitting part 12 in the fourth embodiment. Figure 11 This is a cross-sectional view showing the engaged state of the first fitting portion 12 and the second fitting portion 22. The fourth embodiment differs from the first embodiment in that the stepped portion 34 has a groove 15. Sometimes, descriptions of the fourth embodiment's similarities to the first embodiment are omitted.

[0081] like Figure 10 As shown, the first fitting portion 12 has a groove 15 on the inner peripheral surface of the stepped portion 34. The groove 15 is formed at the middle portion in the Z direction of the stepped portion 34. The groove 15 is recessed from the inner peripheral surface of the stepped portion 34 towards the +R side. The inner diameter of the bottom surface of the groove 15 is larger than the inner diameter of the stepped portion 34. The groove 15 is formed in a ring shape covering the entire circumference of the first fitting portion 12.

[0082] like Figure 11 As shown, the end of the housing 30 on the -Z side between the first fitting portion 12 and the second fitting portion 22 has a first space S1, which is the same as in the first embodiment. In addition, the housing 30 has a fourth space S4, which serves as the internal space of the groove portion 15. The first space S1 and the fourth space S4 are separate from the interior of the housing 30.

[0083] As mentioned above, iron filings are generated due to the mutual friction between the corner of the second fitting portion 22 and the stepped portion 34 of the first fitting portion 12. A portion of these iron filings is captured by the fourth space S4 formed in the middle portion of the stepped portion 34 in the Z direction. The remaining iron filings not captured by the fourth space S4 are captured by the first space S1 located at the end of the stepped portion 34 on the -Z side. Because the fourth space S4 has a large volume, the iron filings are sufficiently captured, making it difficult for them to penetrate the interior of the housing 30. Therefore, it is possible to suppress malfunctions of the compressor 90.

[0084] As detailed above, the step portion 34 of the fourth embodiment has a groove 15 recessed toward the +R side in the middle portion in the Z direction.

[0085] Therefore, some of the iron filings and other debris generated by the mutual friction between the first fitting part 12 and the second fitting part 22 are captured by the fourth space S4 and are difficult to penetrate into the interior of the housing 30. Thus, it is possible to suppress the occurrence of malfunctions in the compressor 90.

[0086] The techniques related to the joining of the main housing 10 and the upper housing 20, as detailed in the embodiments, can also be applied to the joining of the main housing 10 and the lower housing (end housing) 38. When the lower housing 38 is inserted into the -R side of the main housing 10, the fitting portion of the main housing 10 is the first fitting portion, and the fitting portion of the lower housing 38 is the second fitting portion. The front end side (-Z side) in the Z direction of the first fitting portion is designated as the third side, and the base end side (+Z side) in the Z direction of the first fitting portion is designated as the fourth side. It is sufficient that the end of the fourth side between the first fitting portion and the second fitting portion has a space S that separates from the interior of the housing 30.

[0087] In one embodiment, the upper housing 20 is inserted into the -R side of the main housing 10. Conversely, the main housing 10 can also be inserted into the -R side of the upper housing 20. In this case, the fitting portion of the upper housing 20 is a first fitting portion, and the fitting portion of the main housing 10 is a second fitting portion. The front end side (-Z side) in the Z direction of the first fitting portion is designated as the third side, and the base end side (+Z side) in the Z direction of the first fitting portion is designated as the fourth side. It is sufficient that the end of the fourth side between the first fitting portion and the second fitting portion has a space S that separates from the interior of the housing 30.

[0088] According to at least one embodiment described above, the end on the fourth side between the first fitting portion 12 and the second fitting portion 22 has a space S that separates from the interior of the housing 30. This allows for the suppression of malfunctions in the compressor 90.

[0089] Several embodiments of this utility model have been described, but these embodiments are merely illustrative and not intended to limit the scope of the utility model. These embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the utility model. These embodiments or variations thereof are included within the scope or spirit of the utility model, and also within the scope of the utility model and its equivalents as described in the claims.

[0090] Explanation of reference numerals in the attached figures

[0091] S…space, S1…first space, S2…second space, S3a, S3b…third space, 1…refrigeration cycle device, 4…first heat exchanger (radiator, absorber), 5…expansion device, 6…second heat exchanger (absorber, radiator), 10…main shell, 12…first fitting part (fitting part), 13…recess, 14a, 14b…bag part, 15…groove part, 20…upper shell (end shell), 22…second fitting part (fitting part), 23…C chamfer (chamfer), 30…shell, 34…step part, 34e…step surface, 38…lower shell (end shell), 90…compressor, 92…compression mechanism part, 93…motor.

Claims

1. A compressor, characterized in that, have: The compression mechanism compresses the gas; An electric motor drives the compression mechanism; and The housing contains the compression mechanism and the electric motor. The shell has a cylindrical main shell and a bowl-shaped end shell. The end housing covers the axial end opening of the main housing and engages with the main housing. The main housing and the end housing each have overlapping fitting portions when viewed radially from the main housing. The outer radial side of the main housing is designated as the first side, and the inner radial side is designated as the second side. The fitting portion of the main housing and the fitting portion of the end housing, wherein the one disposed on the first side is designated as the first fitting portion, and the one disposed on the second side is designated as the second fitting portion. When the axial front end side of the first fitting portion is designated as the third side, and the axial base end side of the first fitting portion is designated as the fourth side, The housing has a space at the end of the fourth side between the first fitting portion and the second fitting portion that is separated from the interior of the housing.

2. The compressor according to claim 1, characterized in that, The housing has a stepped portion on the inner periphery of the first fitting portion. The inner diameter of the stepped portion is larger than the fourth side of the first fitting portion, and the end of the fourth side of the first fitting portion has a stepped surface. The end face of the fourth side of the second fitting portion abuts against the stepped surface.

3. The compressor according to claim 2, characterized in that, The second fitting portion has a chamfered corner on the fourth side of its outer periphery. The space includes a first space formed between the chamfer and the first fitting portion.

4. The compressor according to claim 2 or 3, characterized in that, The first fitting portion has a recessed portion at the end on the fourth side of the stepped portion that is recessed toward the first side. The space includes a second space formed between the recess and the second fitting portion.

5. The compressor according to claim 2 or 3, characterized in that, The first fitting portion has a pocket portion recessed toward the fourth side at its end on the first side of the stepped surface. The space includes a third space formed between the bag portion and the second fitting portion.

6. The compressor according to claim 3, characterized in that, The stepped portion has a groove recessed toward the first side at the middle part of the axial direction.

7. A refrigeration cycle device, characterized in that, have: The compressor according to any one of claims 1 to 3; A radiator is connected to the compressor; An expansion device, connected to the radiator; and A heat absorber is connected between the expansion device and the compressor.

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