Compressor and refrigeration cycle unit

Abstract

This invention provides a compressor and a refrigeration cycle device for suppressing malfunctions. The compressor includes a compression mechanism for compressing gas, an electric motor for driving the compression mechanism, and a housing for housing 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 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. Of 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 axial front end side of the first fitting portion is designated as a third side, and the axial base end side of the first fitting portion is designated as a fourth side. At least one of the first corner portion on the third side of the inner periphery of the first fitting portion and the second corner portion on the fourth side of the outer periphery of the second fitting portion forms an R-shaped chamfer.

Description

Technical Field

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

[0002] In a refrigeration cycle device, 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] A compressor is needed that can 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. 2019-19714 Utility Model Content

[0007] The problem to be solved by this utility model is to provide a compressor and refrigeration cycle device that can suppress malfunctions.

[0008] 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. At least one of the first corner portion on the third side of the inner periphery of the first fitting portion and the second corner portion on the fourth side of the outer periphery of the second fitting portion has an R-shaped chamfer.

[0009] The compressor of embodiment 2 is based on the compressor described in embodiment 1. A first R-shaped chamfer is formed at the first corner, and a second R-shaped chamfer is formed at the second corner.

[0010] The compressor of embodiment 3 is based on the compressor described in embodiment 2. When the radial distance from the inner circumferential surface of the first fitting portion to the center of the first R-shaped chamfer is set as c1, and the radius of curvature of the first R-shaped chamfer is set as R1, c1 = R1. When the radial magnitude of the first R-shaped chamfer is set as a1, and the distance from the end face of the third side of the first fitting portion to the center of the first R-shaped chamfer is set as b1, a1 < b1. When the radial distance from the outer circumferential surface of the second fitting portion to the center of the second R-shaped chamfer is set as c2, and the radius of curvature of the second R-shaped chamfer is set as R2, c2 = R2. When the radial magnitude of the second R-shaped chamfer is set as a2, and the distance from the end face of the fourth side of the second fitting portion to the center of the second R-shaped chamfer is set as b2, a2 ​​< b2.

[0011] The compressor of embodiment 4 is based on the compressor described in embodiment 2 or 3. The housing has a first stepped portion formed on the inner periphery of the first fitting portion, or a second stepped portion formed on the outer periphery of the second fitting portion. The inner diameter of the first 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 first stepped surface. The outer diameter of the second stepped portion is smaller than the third side of the second fitting portion, and the end of the third side of the second fitting portion has a second stepped surface. The housing has a first stepped portion such that when the radial width of the first stepped surface is set to e1 and the radial size of the second R-bevel is set to a2, a2 ​​< e1. The housing has a second stepped portion such that when the radial width of the second stepped surface is set to e2 and the radial size of the first R-bevel is set to a1, a1 < e2. When the distance from the end face of the third side of the first fitting part to the center of the first R chamfer is set as b1, the distance from the end face of the fourth side of the second fitting part to the center of the second R chamfer is set as b2, and the axial length of the first step part and the second step part is set as h, b1 < h / 2 and b2 < h / 2 are true.

[0012] The compressor of embodiment 5 is based on the compressor described in embodiment 4. The housing has a first stepped portion, and when the radial size of the first R chamfer is set to a1, 0.3mm < a1 holds true. The housing has a second stepped portion, and when the radial size of the second R chamfer is set to a2, 0.3mm < a2 holds true.

[0013] The compressor of embodiment 6 is based on any one of embodiments 1 to 5. The first fitting part is the fitting part of the main housing, and the second fitting part is the fitting part of the end housing.

[0014] 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

[0015] Figure 1 It is a circuit diagram of the refrigeration cycle device and a side view of the compressor.

[0016] Figure 2 for Figure 1 Enlarged view of the cross-section of part E.

[0017] Figure 3 This is an exploded view of the main shell and the upper shell.

[0018] Figure 4 This is an illustration of the joining method of the housing.

[0019] Figure 5 This is an explanatory diagram showing the contact state of the first and second fitting parts.

[0020] Figure 6 This is an enlarged view of the contact state of the first and second fitting parts in the embodiment.

[0021] Figure 7 This is an enlarged view of the contact state of the first and second mating parts in the comparison method.

[0022] Explanation of reference numerals in the attached figures

[0023] 1…Refrigeration cycle device; 4…First heat exchanger (radiator, absorber); 5…Expansion device; 6…Second heat exchanger (absorber, radiator); 10…Main housing; 12…First fitting part (fitting part); 13…First R-bevel (R-bevel); 20…Upper housing (end housing); 22…Second fitting part (fitting part); 23…Second R-bevel (R-bevel); 30…Housing; 34…Step part (second step part); 34e…Step surface (second step surface); 38…Lower housing (end housing); 90…Compressor; 92…Compression mechanism part; 93…Motor. Detailed Implementation

[0024] Hereinafter, the compressor and refrigeration cycle device of the embodiment will be described with reference to the accompanying drawings.

[0025] 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.

[0026] The compressor 90 compresses the low-pressure gaseous refrigerant drawn into it, transforming it into a high-temperature, high-pressure gaseous refrigerant. A receiver (gas-liquid separator) 2b is located upstream of the compressor 90. The receiver 2b separates the gaseous and liquid refrigerant phases and supplies the gaseous refrigerant to the compressor 90.

[0027] 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 position... 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).

[0028] 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).

[0029] The condenser dissipates heat from the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 90, turning the high-temperature, high-pressure gaseous refrigerant into a high-pressure liquid refrigerant.

[0030] 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.

[0031] 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.

[0032] Thus, in the refrigeration cycle device 1, the refrigerant, serving as the working fluid, circulates while undergoing 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.

[0033] 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.

[0034] 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.

[0035] In this application, the Z and R directions 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.

[0036] 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.

[0037] 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 is engaged 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.

[0038] Figure 2 yes Figure 1 An 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 -R side of the main housing 10, the fillet weld can be performed from the +Z side of the main housing 10, making the fillet weld operation easy.

[0039] 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 2 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 2 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.

[0040] Figure 3This is an exploded view of the main housing 10 and the upper housing 20. The housing 30 has a first stepped portion formed on the inner periphery of the first fitting portion or a second stepped portion formed on the outer periphery of the second fitting portion. Figure 3 In this example, the housing 30 has a stepped portion (second stepped portion) 34 formed on the outer periphery of the second fitting portion 22 of the upper housing 20. The outer diameter of the stepped portion 34 of the second fitting portion 22 is smaller than the outer diameter of the upper housing 20 on the +Z side of the second fitting portion 22. A step is formed between the outer periphery of the upper housing 20 on the +Z side of the second fitting portion 22 and the outer periphery of the stepped portion 34 of the second fitting portion 22. A stepped surface (second stepped surface) 34e facing the -Z side is formed at the end of the second fitting portion 22 on the +Z side.

[0041] The outer diameter D2 of the stepped portion 34 of the second fitting portion 22 is smaller than the inner diameter D1 of the first fitting portion 12. The stepped portion 34 of the second fitting portion 22 is inserted into the -R side of the first fitting portion 12.

[0042] A first R-shaped chamfer 13 is formed at the first corner on the +Z side of the inner periphery of the first fitting portion 12. The magnitude a1 of the first R-shaped chamfer 13 in the R direction is smaller than the width e2 of the step surface 34e in the R direction. That is, a1 < e2 holds. As a result, the end face on the +Z side of the first fitting portion 12 abuts against the step surface 34e. Consequently, the main housing 10 and the upper housing 20 are positioned in the Z direction.

[0043] A second R-shaped chamfer 23 is formed at the second corner on the -Z side of the outer periphery of the stepped portion 34 of the second fitting portion 22. The magnitude a2 of the R direction of the second R-shaped chamfer 23 is greater than or equal to the magnitude a1 of the R direction of the first R-shaped chamfer 13. The magnitude a2 of the R direction of the second R-shaped chamfer 23 is greater than 0.3 mm. That is, 0.3 mm < a2 holds true.

[0044] The distance c1 in the R direction from the inner peripheral surface of the first fitting portion 12 to the center 13c of the first R chamfer 13 is equal to the first radius of curvature R1 of the first R chamfer 13. That is, c1 = R1 holds true. In addition, the distance b1 from the +Z side end face of the first fitting portion 12 to the center 13c of the first R chamfer 13 is greater than the magnitude a1 of the R direction of the first R chamfer 13. That is, a1 < b1 holds true. Thus, the end face of the first R chamfer 13 on the -Z side and the first connecting portion 14 of the inner peripheral surface of the first fitting portion 12 are smoothly and continuously connected.

[0045] The distance c2 in the R direction from the outer peripheral surface of the stepped portion 34 of the second fitting portion 22 to the center 23c of the second R-chamfer 23 is equal to the second radius of curvature R2 of the second R-chamfer 23. That is, c2 = R2 holds true. In addition, the distance b2 from the end face of the -Z side of the second fitting portion 22 to the center 23c of the second R-chamfer 23 is greater than the magnitude a2 of the R direction of the second R-chamfer 23. That is, a2 < b2 holds true. Thus, the end face of the second R-chamfer 23 on the +Z side and the second connecting portion 24 of the outer peripheral surface of the stepped portion 34 of the second fitting portion 22 are smoothly and continuously connected.

[0046] The distance b1 from the +Z side end face of the first fitting portion 12 to the center 13c of the first R chamfer 13 is less than half the Z-direction length h of the stepped portion 34. That is, b1 < h / 2 holds true. Similarly, the distance b2 from the -Z side end face of the second fitting portion 22 to the center 23c of the second R chamfer 23 is less than half the Z-direction length h of the stepped portion 34. That is, b2 < h / 2 holds true. Therefore, the inner circumferential surface of the first fitting portion 12 and the outer circumferential surface of the stepped portion 34 of the second fitting portion 22 are in surface contact with each other. Consequently, the fitting stability of the first fitting portion 12 and the second fitting portion 22 in the R direction is increased.

[0047] Figure 4 This is an explanatory diagram of the joining method of the housing 30. A 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. As described above, the outer diameter D2 of the stepped portion 34 of the second fitting portion 22 is smaller than the inner diameter D1 of the first fitting portion 12. However, sometimes 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 degrees. Furthermore, since various components are mounted 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 relative to the main housing 10. Sometimes, the upper housing 20 is struck with a hammer to insert it into the main housing 10.

[0048] Figure 5 This is an explanatory diagram showing the contact state of the first fitting part 12 and the second fitting part 22. When the upper housing 20 is inserted into the main housing 10 in an inclined state, the second corner of the outer periphery of the second fitting part 22 on the -Z side abuts against the first corner of the inner periphery of the first fitting part 12 on the +Z side.

[0049] Figure 7 This is an enlarged view of the contact state of the first fitting part 12 and the second fitting part 22 in the comparison method. Figure 7 Is with Figure 5An enlarged view of a portion corresponding to part F. In the comparison method, C-shaped chamfers (planar chamfers, conical chamfers) are formed on both the first and second corners. A first C-shaped chamfer 13p is formed on the first corner, and a second C-shaped chamfer 23p is formed on the second corner.

[0050] The end of the second C chamfer 23p on the +Z side forms a discontinuous corner with the second connecting portion 24p on the outer peripheral surface of the step portion 34 of the second fitting portion 22. The end of the first C chamfer 13p on the -Z side forms a discontinuous corner with the first connecting portion 14p on the inner peripheral surface of the first fitting portion 12.

[0051] When the upper housing 20 is inserted into the main housing 10, the second connecting portion 24p rubs against the first connecting portion 14p. As a result, the corners of the second connecting portion 24p and / or the first connecting portion 14p are chipped off, producing iron filings, iron powder, etc. (referred to as iron filings, etc.). The generated iron filings, etc., may cause malfunctions such as poor lubrication of the compression mechanism 92 and poor insulation of the motor 93 inside the housing 30.

[0052] Figure 6 This is an enlarged view of the contact state of the first fitting part 12 and the second fitting part 22 in the embodiment. Figure 6 yes Figure 5 An enlarged view of part F. When the upper housing 20 is inserted into the main housing 10, the second connecting part 24 rubs against the first connecting part 14. In the second connecting part 24, the second R-shaped chamfer 23 is smoothly and continuously connected to the outer peripheral surface of the stepped portion 34 of the second fitting part 22. In the first connecting part 14, the first R-shaped chamfer 13 is smoothly and continuously connected to the inner peripheral surface of the first fitting part 12. Therefore, even if the second connecting part 24 and the first connecting part 14 rub against each other, it is not easy to generate iron filings or the like. As a result, the occurrence of compressor malfunctions is suppressed.

[0053] Furthermore, it is sufficient that at least one of the first corner of the first fitting portion 12 and the second corner of the second fitting portion 22 has a chamfered radius (R). In this case, at least one of the first connecting portion 14 and the second connecting portion 24 becomes a smoothly continuous connecting portion. Thus, even if the second connecting portion 24 rubs against the first connecting portion 14, the generation of iron filings and the like can be suppressed.

[0054] Furthermore, a corner portion 25 is formed between the end face of the second fitting portion 22 on the -Z side and the second R chamfer 23. As described above, the size a2 of the R direction of the second R chamfer 23 (refer to...) Figure 3 The diameter is greater than 0.3 mm. This suppresses the contact between the corner 25 and the first fitting part 12.

[0055] As described in detail above, the compressor 90 of the 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 Z-direction end of the main housing 10 and engages with the main housing 10. The main housing 10 and the upper housing 20 each have overlapping fitting portions 12 and 22 when viewed from the R direction. 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. In the fitting portion 12 of the main housing 10 and the fitting portion 22 of the upper housing 20, the one located on the +R side is designated as the first fitting portion 12, and the one 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. At least one of the first corner portion on the third side of the inner periphery of the first fitting portion 12 and the second corner portion on the fourth side of the outer periphery of the second fitting portion 22 is provided with an R-shaped chamfer.

[0056] When the first fitting portion 12 and the second fitting portion 22 are engaged, the R-shaped chamfer formed on at least one of the first corner portion and the second corner portion rubs against each other. This suppresses the generation of iron filings and the like, thereby suppressing malfunctions of the compressor 90.

[0057] A first R-shaped chamfer 13 is formed at the first corner, and a second R-shaped chamfer 14 is formed at the second corner.

[0058] By forming R-shaped chamfers at both the first and second corners, the generation of iron filings and the like can be effectively suppressed.

[0059] Let c1 be the distance in the R direction from the inner peripheral surface of the first fitting portion 12 to the center 13c of the first R-shaped chamfer 13. Let R1 be the first radius of curvature of the first R-shaped chamfer 13. At this time, c1 = R1 holds true. Let a1 be the magnitude of the R direction of the first R-shaped chamfer 13. Let b1 be the distance from the +Z side end face of the first fitting portion 12 to the center 13c of the first R-shaped chamfer 13. At this time, a1 < b1 holds true. Thus, the end face of the first R-shaped chamfer 13 on the -Z side and the first connecting portion 14 of the inner peripheral surface of the first fitting portion 12 are smoothly and continuously connected.

[0060] Let c2 be the distance in the R direction from the outer peripheral surface of the second fitting portion 22 to the center 23c of the second R-bevel 23. Let R2 be the second radius of curvature of the second R-bevel 23. At this time, c2 = R2 holds true. Let a2 be the magnitude of the R direction of the second R-bevel 23. Let b2 be the distance from the end face of the -Z side of the second fitting portion 22 to the center 23c of the second R-bevel 23. At this time, a2 < b2 holds true. Thus, the end face of the second R-bevel 23 on the +Z side and the second connecting portion 24 of the outer peripheral surface of the stepped portion 34 of the second fitting portion 22 are smoothly and continuously connected.

[0061] The surfaces of the first connecting portion 14 and the second connecting portion 24 are smooth and continuous. Therefore, when the first fitting portion 12 and the second fitting portion 22 are engaged, even if the first connecting portion 14 and the second connecting portion 24 rub against each other, it is not easy to generate iron filings or the like. As a result, the occurrence of compressor malfunctions is suppressed.

[0062] The housing 30 has a stepped portion 34 formed on the outer periphery of the second fitting portion 22. The outer diameter of the stepped portion 34 is smaller than that of the +Z side of the second fitting portion 22, and the end of the second fitting portion 22 on the +Z side has a stepped surface 34e. Let the width of the stepped surface 34e in the R direction be e2, and let the size of the first R chamfer 13 in the R direction be a1. At this time, a1 < e2 holds. Let the distance from the end face of the first fitting portion 12 on the +Z side to the center 13c of the first R chamfer 13 be b1. Let the distance from the end face of the second fitting portion 22 on the -Z side to the center 23c of the second R chamfer 23 be b2. Let the length of the stepped portion 34 in the Z direction be h. At this time, b1 < h / 2 and b2 < h / 2 holds.

[0063] As a result, the fitting stability of the first fitting part 12 and the second fitting part 22 in the Z and R directions becomes higher.

[0064] When the size of the R direction of the second R chamfer 23 is set to a2, 0.3mm < a2 holds true.

[0065] Even if a corner 25 is formed between the end face of the -Z side of the second fitting portion 22 and the second R chamfer 23, the contact between the corner 25 and the first fitting portion 12 can be suppressed. As a result, the generation of iron filings and the like is suppressed.

[0066] The first fitting part 12 is the fitting part of the main housing 10. The second fitting part 22 is the fitting part of the upper housing 20.

[0067] A fillet weld bead 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 fillet weld operation can be performed from the +Z side of the main housing 10, and the fillet weld operation is easy.

[0068] 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.

[0069] 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.

[0070] 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. At least one of the first corner portion on the third side of the inner periphery of the first fitting portion and the second corner portion on the fourth side of the outer periphery of the second fitting portion is provided with an R chamfer.

[0071] In one embodiment, the upper housing 20 is inserted into the -R side of the main housing 10. Conversely, the main housing 10 may 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. An R-shaped chamfer may be formed on at least one of the first corner portion on the third side of the inner periphery of the first fitting portion and the second corner portion on the fourth side of the outer periphery of the second fitting portion.

[0072] The housing 30 of the embodiment has a stepped portion (second stepped portion) 34 formed on the outer periphery of the second fitting portion 22. In contrast, the housing 30 may also have a first stepped portion formed on the inner periphery of the first fitting portion 12. The inner diameter of the first stepped portion is larger than the fourth side of the first fitting portion 12, and a first stepped surface is formed at the end of the fourth side of the first fitting portion 12. When the width of the first stepped surface in the R direction is set to e1, and the size of the second R-direction chamfer 23 in the R direction is set to a2, a2 ​​< e1. When the size of the first R-direction chamfer 13 in the R direction is set to a1, 0.3 mm < a1.

[0073] According to at least one embodiment described above, at least one of the first corner and the second corner has a chamfered radius (R). This helps to suppress malfunctions of the compressor 90.

[0074] 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 new 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 and their variations are included in the scope and spirit of the utility model, and are included in the scope of the utility model and its equivalents as set forth in the claims.

Claims

1. A compressor, characterized in that, The device includes a compression mechanism for compressing gas, an electric motor for driving the compression mechanism, and a housing for housing 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 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 outer radial side of the main housing is designated as the first side, and the inner radial side is designated as the second side. Of the fitting portion of the main housing and the fitting portion of the end housing, the one located on the first side is designated as the first fitting portion, and the one located on the second side is designated as the second fitting portion. When the axial front end side of the first fitting part is designated as the third side and the axial base end side of the first fitting part is designated as the fourth side, At least one of the first corner portion on the third side of the inner periphery of the first fitting portion and the second corner portion on the fourth side of the outer periphery of the second fitting portion has an R-shaped chamfer.

2. The compressor according to claim 1, characterized in that, A first R-shaped chamfer is formed at the first corner, and a second R-shaped chamfer is formed at the second corner.

3. The compressor according to claim 2, characterized in that, When the radial distance from the inner circumferential surface of the first fitting portion to the center of the first R-shaped chamfer is defined as c1, and the radius of curvature of the first R-shaped chamfer is defined as R1, c1 = R1 holds true. When the radial dimension of the first R-shaped chamfer is set to a1, and the distance from the end face of the third side of the first fitting portion to the center of the first R-shaped chamfer is set to b1, a1 < b1 holds true. When the radial distance from the outer peripheral surface of the second fitting part to the center of the second R-shaped chamfer is set to c2, and the radius of curvature of the second R-shaped chamfer is set to R2, c2 = R2 holds true. When the radial dimension of the second R chamfer is set to a2 and the distance from the end face of the fourth side of the second fitting portion to the center of the second R chamfer is set to b2, a2 ​​< b2 holds true.

4. The compressor according to claim 2 or 3, characterized in that, The housing has a first stepped portion formed on the inner periphery of the first fitting portion, or a second stepped portion formed on the outer periphery of the second fitting portion. The inner diameter of the first 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 first stepped surface. The outer diameter of the second stepped portion is smaller than that of the third side of the second fitting portion, and a second stepped surface is provided at the end of the third side of the second fitting portion. The housing has the first stepped portion. When the radial width of the first stepped surface is set to e1 and the radial size of the second R-shaped chamfer is set to a2, a2 ​​< e1 holds true. The housing has a second stepped portion, and when the radial width of the second stepped surface is set to e2 and the radial size of the first R-bevel is set to a1, a1 < e2 holds true. When the distance from the end face of the third side of the first fitting portion to the center of the first R-shaped chamfer is set as b1, the distance from the end face of the fourth side of the second fitting portion to the center of the second R-shaped chamfer is set as b2, and the axial length of the first step portion and the second step portion is set as h, b1 < h / 2 and b2 < h / 2 are true.

5. The compressor according to claim 4, characterized in that, The housing has the first stepped portion, and when the radial dimension of the first R chamfer is set to a1, 0.3mm < a1 holds true. The housing has a second stepped portion, and when the radial size of the second R chamfer is set to a2, 0.3mm < a2 holds true.

6. The compressor according to claim 1 or 2, characterized in that, The first fitting part is the fitting part of the main housing. The second fitting part is the fitting part of the end housing.

7. A refrigeration cycle device, characterized in that, have: The compressor according to claim 1 or 2; 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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