Compressor and refrigeration cycle apparatus

Abstract

To provide a compressor and a refrigerating cycle device capable of suppressing the occurrence of malfunction.SOLUTION: A compressor includes a compression mechanism part, an electric motor, and a case. The case includes a cylindrical main case and a bowl-shaped end case. The main case and the end case each have a fitting portion that overlaps when viewed from a radial direction of the main case. An outer side in a radial direction of the main case is defined as a first side, and an inner side in the radial direction is defined as a second side. Of the fitting portion of the main case and the fitting portion of the end case, the fitting portion disposed on the first side is referred to as a first fitting portion, and the fitting portion disposed on the second side is referred to as a second fitting portion. A distal end side of the first fitting portion in the axial direction is defined as a third side, and a proximal end side of the first fitting portion in the axial direction is defined as a fourth side. The case has a space separated from the inside of the case at an end portion on the fourth side between the first fitting portion and the second fitting portion.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] An embodiment of the present invention relates to a compressor and a refrigeration cycle device. [Background technology]

[0002] A refrigeration cycle device uses a compressor that compresses a refrigerant. The compressor has a compression mechanism, an electric motor, and a case. The compression mechanism compresses the refrigerant. The electric motor drives the compression mechanism. The case houses the compression mechanism and the electric motor. There is a demand for a compressor that can suppress malfunctions such as poor lubrication of the compression mechanism and poor insulation of the motor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-191765 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a compressor and a refrigeration cycle device that can suppress the occurrence of malfunctions. [Means for solving the problem]

[0005] The compressor of the first embodiment has a compression mechanism, an electric motor, and a case. The compression mechanism compresses gas. The electric motor drives the compression mechanism. The case houses the compression mechanism and the electric motor. The case has a cylindrical main case and a bowl-shaped end case. The end case is joined to the main case, covering the opening at the axial end of the main case. The main case and the end case each have mating portions that overlap when viewed radially of the main case. The radially outer side of the main case is referred to as the first side, and the radially inner side is referred to as the second side. Of the mating portions of the main case and the end case, the one located on the first side is referred to as the first mating portion, and the one located on the second side is referred to as the second mating portion. The axial tip side of the first mating portion is referred to as the third side, and the axial base side of the first mating portion is referred to as the fourth side. The case has a space separated from the interior of the case at a fourth end between the first fitting portion and the second fitting portion.

[0006] A compressor according to a second aspect of the embodiment is based on the compressor according to the first aspect. The case has a stepped portion on the inner periphery of the first fitting portion. The stepped portion has an inner diameter larger than that of the fourth side of the first fitting portion, and has a stepped surface at an end of the fourth side of the first fitting portion. The end face of the fourth side of the second fitting portion abuts against the stepped surface.

[0007] A compressor according to a third aspect of the embodiment is based on the compressor according to the second aspect. The second fitting portion has a chamfer at a fourth corner of the outer periphery. The space includes a first space formed between the chamfer and the first fitting portion.

[0008] A compressor according to a fourth aspect of the embodiment is based on the compressor according to the second or third aspect. The first fitting portion has a recess recessed toward the first side at a fourth end of the stepped portion. The space includes a second space formed between the recess and the second fitting portion.

[0009] A compressor according to a fifth aspect of the embodiment is based on the compressor according to the second or third aspect. The first fitting portion has a pocket portion recessed toward the fourth side at an end portion on the first side of the stepped surface. The space includes a third space formed between the pocket portion and the second fitting portion.

[0010] A compressor according to a sixth aspect of the embodiment is based on the compressor according to any one of the third to fifth aspects. The step portion has a groove recessed toward the first side in an axially intermediate portion.

[0011] A refrigeration cycle device according to an embodiment includes the compressor according to any one of aspects 1 to 6, a heat radiator connected to the compressor, an expansion device connected to the heat radiator, and a heat sink connected between the expansion device and the compressor. [Brief explanation of the drawings]

[0012] [Figure 1] 2 is a circuit diagram of the refrigeration cycle device and a side view of a compressor. FIG. [Figure 2] FIG. 3 is a cross-sectional view of a first fitting portion in the first embodiment. [Figure 3] 2 is an enlarged cross-sectional view of part E in FIG. 1, showing the first fitting portion and the second fitting portion in a fitted state. [Figure 4] FIG. 10 is a cross-sectional view of a first fitting portion in a second embodiment. [Figure 5] FIG. 4 is a cross-sectional view of the first fitting portion and the second fitting portion in a fitted state. [Figure 6] FIG. 11 is a cross-sectional view of a first fitting portion in a third embodiment. [Figure 7] FIG. 4 is a cross-sectional view of the first fitting portion and the second fitting portion in a fitted state. [Figure 8] FIG. 11 is a cross-sectional view of a first fitting portion in a modified example of the third embodiment. [Figure 9] FIG. 4 is a cross-sectional view of the first fitting portion and the second fitting portion in a fitted state. [Figure 10] FIG. 10 is a cross-sectional view of a first fitting portion in the fourth embodiment. [Figure 11] FIG. 4 is a cross-sectional view of the first fitting portion and the second fitting portion in a fitted state. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, a compressor and a refrigeration cycle device according to an embodiment will be described with reference to the drawings. 1 is a circuit diagram of a refrigeration cycle apparatus 1 and a side view of a compressor 90. The refrigeration cycle apparatus 1 has 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 circulates a refrigerant through these devices. The refrigerant circulates through the refrigeration cycle apparatus 1 while undergoing a phase change.

[0014] The compressor 90 compresses the low-pressure gas refrigerant taken in to produce high-temperature, high-pressure gas refrigerant. An accumulator (gas-liquid separator) 2b is arranged upstream of the compressor 90. The accumulator 2b separates the gas-liquid two-phase refrigerant and supplies the gas refrigerant to the compressor 90.

[0015] 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 the state shown in Figure 1, the refrigerant discharged from the compressor 90 flows through the first heat exchanger 4, the expansion device 5, and the second heat exchanger 6 in that order. At this time, the first heat exchanger 4 functions as a condenser (heat radiator), and the second heat exchanger 6 functions as an evaporator (heat absorber). When the four-way valve 3 is switched from the state shown in Fig. 1, the refrigerant discharged from the compressor 90 flows sequentially through 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 (heat radiator), and the first heat exchanger 4 functions as an evaporator (heat absorber).

[0016] The condenser dissipates heat from the high-temperature, high-pressure gas refrigerant discharged from the compressor 90, and converts the high-temperature, high-pressure gas refrigerant into a high-pressure liquid refrigerant. The expansion device 5 reduces the pressure of the high-pressure liquid refrigerant sent from the condenser, and converts the high-pressure liquid refrigerant into a low-temperature, low-pressure two-phase gas-liquid refrigerant. For example, the expansion device 5 is an expansion valve. The evaporator converts the gas-liquid two-phase refrigerant sent from the expansion device 5 into low-pressure gas refrigerant. When the low-pressure gas-liquid two-phase refrigerant evaporates in the evaporator, it absorbs heat of vaporization from the surroundings, thereby cooling the surroundings. The low-pressure gas refrigerant that has passed through the evaporator is taken into the compressor 90 described above via the accumulator 2b.

[0017] In this way, the refrigerant, which is a working fluid, circulates while changing phases between gas and liquid in the refrigeration cycle apparatus 1. The refrigerant releases heat during the phase change from gas to liquid, and absorbs heat during the phase change from liquid to gas. The refrigeration cycle apparatus 1 performs heating, cooling, defrosting, etc. by utilizing the heat release or absorption of the refrigerant.

[0018] The compressor 90 has a compression mechanism 92, an electric motor 93, and a case 30. The compression mechanism 92 compresses a refrigerant. The electric motor 93 drives the compression mechanism 92. The case 30 houses the compression mechanism 92 and the electric motor 93. The case 30 has a main case 10, an upper case (end case) 20, and a lower case (end case) 38. The main case 10 is formed into a cylindrical shape from a steel pipe material or the like.

[0019] 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 case 10. The +Z side is the upper case 20 side of the main case 10. The -Z side is the opposite side to 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 case 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.

[0020] The upper case 20 is formed into a bowl shape by drawing a steel plate material, etc. The upper case 20 covers the opening at the end of the main case 10 on the +Z side and is joined to the main case 10. The lower case 38 is formed in the same manner as the upper case 20. The lower case 38 covers the opening at the end of the main case 10 on the -Z side and is joined to the main case 10. The lower case 38 may be formed integrally with the main case 10 as part of the main case 10. A bracket 39 for fixing the compressor 90 is connected to the lower case 38.

[0021] 3 is an enlarged view of a cross section of portion E in FIG. 1. The -Z side end of the upper case 20 is inserted into the -R side of the +Z side end of the main case 10. A weld bead 31 is formed by fillet welding at the corner between the +Z side end face of the main case 10 and the outer circumferential surface of the upper case 20. The main case 10 and the upper case 20 are joined by welding. Because the upper case 20 is inserted into the -R side of the main case 10, fillet welding can be performed from the +Z side of the main case 10, making the fillet welding work easy.

[0022] The main case 10 and the upper case 20 each have a mating portion that overlaps when viewed from the R direction. Of these, the mating portion arranged on the +R side is referred to as the first mating portion, and the mating portion arranged on the -R side is referred to as the second mating portion. In the example of FIG. 3, the mating portion of the main case 10 arranged on the +R side is the first mating portion 12, and the mating portion of the upper case 20 arranged on the -R side is the second mating portion 22. The tip side of the first mating portion in the Z direction is referred to as the third side, and the base end side of the first mating portion in the Z direction is referred to as the fourth side. In the example of FIG. 3, the +Z side, which is the tip side of the first mating portion 12, is the third side, and the -Z side, which is the base end side of the first mating portion 12, is the fourth side.

[0023] (First embodiment) 2 is a cross-sectional view of the first fitting portion 12 in the first embodiment. A step portion 34 is formed on the inner periphery of the first fitting portion 12 of the main case 10. The inner diameter of the step portion 34 of the first fitting portion 12 is larger than the inner diameter of the main case 10 on the -Z side of the first fitting portion 12. A step is formed between the inner periphery of the main case 10 on the -Z side of the first fitting portion 12 and the inner periphery of the step portion 34 of the first fitting portion 12. A step surface 34e facing the +Z side is formed at the end of the -Z side of the first fitting portion 12.

[0024] 3 is a cross-sectional view of the fitted state of the first fitting portion 12 and the second fitting portion 22. 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.

[0025] A C-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 size c of the C-chamfer 23 in the R direction is smaller than the width e (see FIG. 2) of the step surface 34e in the R direction. This allows the end face on the -Z side of the second fitting portion 22 to abut against the step surface 34e. As a result, the main case 10 and the upper case 20 are positioned in the Z direction. Instead of the C-chamfer 23, an R-chamfer may be formed at the corner of the second fitting portion 22.

[0026] The case 30 has a space S at the end on the -Z side between the first fitting portion 12 and the second fitting portion 22. As described above, the end face on the -Z side of the second fitting portion 22 abuts against the step surface 34e. Therefore, the space S is separated from the interior of the case 30.

[0027] As described above, the second fitting portion 22 of the upper case 20 is inserted into the -R side of the first fitting portion 12 of the main case 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, the upper case 20 may be inserted into the main case 10 while tilted relative to the Z direction. For example, the tilt angle α of the upper case 20 is approximately 1 to 5°. Furthermore, because various components are attached to the main case 10 and the upper case 20, the main case 10 and the upper case 20 do not have high circularity. Therefore, it is difficult to smoothly insert the upper case 20 into the main case 10. In some cases, the upper case 20 is struck with a hammer before being inserted into the main case 10.

[0028] When upper case 20 is inserted into main case 10 in a tilted state, the corner on the -Z side of the outer periphery of second fitting portion 22 rubs against the inner circumferential surface of step portion 34 of first fitting portion 12. This generates iron scraps and iron powder (referred to as iron scraps, etc.). If the generated iron scraps, etc., enter the inside of case 30, they may cause operational malfunctions such as poor lubrication of compression mechanism 92 and poor insulation of electric motor 93.

[0029] Iron scraps and the like generated by the friction are pushed by the corners of the second fitting portion 22 and move to the -Z side along the inner circumferential surface of the stepped 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 scraps and the like that have moved to the -Z side end of the stepped portion 34 are captured inside the space S. Because the space S is separated from the interior of the case 30, the intrusion of iron scraps and the like into the interior of the case 30 is suppressed. This makes it possible to suppress malfunctions of the compressor 90.

[0030] The space S in the first embodiment is a first space S1 formed between the C-chamfer 23 of the second fitting portion 22 and the first fitting portion 12. The first space S1 is surrounded by the inner circumferential surface and step surface 34e of the step portion 34 of the first fitting portion 12, and the C-chamfer 23 of the second fitting portion 22. Iron scraps and the like generated by friction between the second fitting portion 22 and the first fitting portion 12 are captured inside the first space S1. Because the first space S1 is separated from the interior of the case 30, iron scraps and the like are prevented from entering the interior of the case 30. This prevents malfunctions of the compressor 90.

[0031] As described above in detail, the compressor 90 of the first embodiment has the compression mechanism 92, the electric motor 93, and the case 30. The compression mechanism 92 compresses gas. The electric motor 93 drives the compression mechanism 92. The case 30 houses the compression mechanism 92 and the electric motor 93. The case 30 has a cylindrical main case 10 and a bowl-shaped upper case 20. The upper case 20 covers an opening at an end of the main case 10 and is joined to the end of the main case 10 in the Z direction. The main case 10 and the upper case 20 each have mating portions 12, 22 that overlap when viewed from the radial direction of the main case 10. The outer side in the R direction is defined as the +R side, and the inner side in the R direction is defined as the -R side. Of the fitting portion 12 of the main case 10 and the fitting portion 22 of the upper case 20, the one arranged on the +R side is referred to as the first fitting portion 12, and the one arranged on the -R side is referred to as the second fitting portion 22. The tip side (+Z side) of the first fitting portion 12 in the Z direction is referred to as the third side, and the base end side (-Z side) of the first fitting portion 12 in the Z direction is referred to as the fourth side. The case 30 has a space S separated from the interior of the case 30 at the end on the fourth side between the first fitting portion 12 and the second fitting portion 22.

[0032] The friction between the first fitting portion 12 and the second fitting portion 22 generates iron scraps and the like. The generated iron scraps and the like are captured in a space S formed at the end portion on the fourth side between the first fitting portion 12 and the second fitting portion 22. Since the space S is separated from the interior of the case 30, the iron scraps and the like are prevented from entering the interior of the case 30. This makes it possible to prevent malfunctions of the compressor 90.

[0033] The case 30 has a step portion 34 on the inner periphery of the first fitting portion 12. The step portion 34 has an inner diameter larger than that of the fourth side of the first fitting portion 12, and has a step surface 34e at the end of the fourth side of the first fitting portion 12. The end face of the fourth side of the second fitting portion 22 abuts against the step surface 34e. This separates the space S from the interior of the case 30. Furthermore, the main case 10 and the upper case 20 are positioned in the Z direction.

[0034] The second fitting portion 22 has a C-chamfer 23 at a fourth corner of the outer periphery. The space S includes a first space S1 formed between the C-chamfer 23 and the first fitting portion 12. Iron scraps and the like generated by friction between the second fitting portion 22 and the first fitting portion 12 are captured inside the first space S1. Since the first space S1 is separated from the inside of the case 30, the iron scraps and the like are prevented from entering the inside of the case 30. This makes it possible to prevent malfunctions of the compressor 90.

[0035] The refrigeration cycle device 1 of the embodiment has the above-mentioned compressor 90, radiators 4, 6 connected to the compressor 90, an expansion device 5 connected to the radiators 4, 6, and heat sinks 6, 4 connected between the expansion device 5 and the compressor 90. The refrigeration cycle apparatus 1 has a compressor 90 in which malfunctions are suppressed, thereby increasing the reliability of the refrigeration cycle apparatus 1.

[0036] (Second embodiment) Fig. 4 is a cross-sectional view of the first fitting portion 12 in the second embodiment. Fig. 5 is a cross-sectional view of the first fitting portion 12 and the second fitting portion 22 in a fitted state. The second embodiment differs from the first embodiment in that the first fitting portion 12 has a recess 13 on the inner circumferential surface. Explanation of the second embodiment regarding the same points as the first embodiment may be omitted.

[0037] As shown in FIG. 4, 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 toward 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 around the entire circumference of the first fitting portion 12.

[0038] As shown in FIG. 5, the case 30 has a space S separated from the interior of the case 30 at the end on the -Z side between the first fitting portion 12 and the second fitting portion 22. The space S is a combination of the first space S1 (see FIG. 3) of the first embodiment and the second space S2. The second space S2 is an 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. Note that the C-chamfer 23 does not necessarily have to 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 includes only the second space S2.

[0039] As described above, scrap iron and the like are generated by friction between the corners of the second fitting portion 22 and the stepped portion 34 of the first fitting portion 12. The generated scrap iron and the like are captured in the space S located at the end of the stepped portion 34 on the -Z side. Because the volume of the second space S2 is large, the scrap iron and the like are sufficiently captured and do not easily enter the inside of the case 30. Therefore, malfunctions of the compressor 90 can be suppressed.

[0040] As described above in detail, the first fitting portion 12 of the second embodiment has the recess 13 recessed toward the +R side at the end on the fourth side (-Z side) of the step portion 34. The space S includes the second space S2 formed between the recess 13 and the second fitting portion 22. Iron chips and the like generated by friction between the first fitting portion 12 and the second fitting portion 22 are captured in the second space S2 and are less likely to enter the inside of the case 30. Therefore, malfunctions of the compressor 90 can be suppressed.

[0041] (Third embodiment) Fig. 6 is a cross-sectional view of the first fitting portion 12 in the third embodiment. Fig. 7 is a cross-sectional view of the first fitting portion 12 and the second fitting portion 22 in a fitted state. The third embodiment differs from the first embodiment in that a pocket portion 14a is provided on the step surface 34e of the first fitting portion 12. Description of the third embodiment that is similar to the first embodiment may be omitted.

[0042] 6, the first fitting portion 12 has a pocket portion 14a at the end on the +R side of the step surface 34e. The pocket portion 14a is recessed from the step surface 34e toward 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 around the entire circumference of the first fitting portion 12.

[0043] As shown in FIG. 7, the case 30 has a space S separated from the interior of the case 30 at the end on the -Z side between the first fitting portion 12 and the second fitting portion 22. The space S is formed by combining the first space S1 (see FIG. 3) of the first embodiment with a third space S3a. The third space S3a is an internal space of the pocket portion 14a, and is formed between the pocket portion 14a and the second fitting portion 22. Note that the C-chamfer 23 does not necessarily have to 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 includes only the third space S3a.

[0044] Fig. 8 is a cross-sectional view of the first fitting portion 12 in a modified example of the third embodiment. Fig. 9 is a cross-sectional view of the first fitting portion 12 and the second fitting portion 22 in a fitted state. As shown in Fig. 8, the first fitting portion 12 has a pocket portion 14b at the end of the step surface 34e on the +R side. The depth of the pocket portion 14b in the Z direction increases from the -R side to the +R side. As shown in Fig. 9, the third space S3b is an internal space of the pocket portion 14b and is formed between the pocket portion 14b and the second fitting portion 22.

[0045] As described above, scrap iron and the like are generated by friction between the corners of the second fitting portion 22 and the stepped portion 34 of the first fitting portion 12. The generated scrap iron and the like are captured in the space S located at the end of the stepped portion 34 on the -Z side. Because the third spaces S3a and S3b have large volumes, the scrap iron and the like are sufficiently captured and are less likely to enter the inside of the case 30. This makes it possible to suppress malfunctions of the compressor 90.

[0046] As described above in detail, the first fitting portion 12 of the third embodiment has the pocket portions 14a, 14b recessed toward the fourth side (-Z side) at the end of the step surface 34e on the +R side. The space S includes the third spaces S3a, S3b formed between the pocket portions 14a, 14b and the second fitting portion 22. Iron chips and the like generated by friction between the first fitting portion 12 and the second fitting portion 22 are captured in the third spaces S3a and S3b and are less likely to enter the inside of the case 30. Therefore, malfunctions of the compressor 90 can be suppressed.

[0047] (Fourth embodiment) Fig. 10 is a cross-sectional view of the first fitting portion 12 in the fourth embodiment. Fig. 11 is a cross-sectional view of the first fitting portion 12 and the second fitting portion 22 in a fitted state. The fourth embodiment differs from the first embodiment in that the step portion 34 has a groove portion 15. Descriptions of the fourth embodiment that are similar to the first embodiment may be omitted.

[0048] As shown in FIG. 10 , the first fitting portion 12 has a groove portion 15 on the inner circumferential surface of the stepped portion 34. The groove portion 15 is formed in the middle portion of the stepped portion 34 in the Z direction. The groove portion 15 is recessed from the inner circumferential surface of the stepped portion 34 toward the +R side. The inner diameter of the bottom surface of the groove portion 15 is larger than the inner diameter of the stepped portion 34. The groove portion 15 is formed in a ring shape around the entire circumference of the first fitting portion 12.

[0049] 11 , the case 30 has the same first space S1 as in the first embodiment at the end on the -Z side between the first fitting portion 12 and the second fitting portion 22. In addition, the case 30 has a fourth space S4 which is the internal space of the groove portion 15. The first space S1 and the fourth space S4 are separated from the interior of the case 30.

[0050] As described above, scrap iron and the like are generated by friction between the corners of the second fitting portion 22 and the step portion 34 of the first fitting portion 12. Some of the generated scrap iron and the like are captured in the fourth space S4 formed in the middle portion of the step portion 34 in the Z direction. The remainder of the scrap iron and the like not captured in the fourth space S4 are captured in the first space S1 located at the end of the step portion 34 on the -Z side. Because the volume of the fourth space S4 is large, scrap iron and the like are sufficiently captured and are less likely to enter the interior of the case 30. Therefore, malfunctions of the compressor 90 can be suppressed.

[0051] As described above in detail, the step portion 34 of the fourth embodiment has the groove portion 15 recessed toward the +R side in the middle portion in the Z direction. As a result, some of the iron chips and the like generated by friction between the first fitting portion 12 and the second fitting portion 22 are captured in the fourth space S4 and are less likely to enter the inside of the case 30. Therefore, malfunctions of the compressor 90 can be suppressed.

[0052] The techniques for joining the main case 10 and the upper case 20 detailed in the embodiment may also be applied to joining the main case 10 and the lower case (end case) 38. When the lower case 38 is inserted into the -R side of the main case 10, the mating portion of the main case 10 is the first mating portion, and the mating portion of the lower case 38 is the second mating portion. The tip end side in the Z direction (-Z side) of the first mating portion is the third side, and the base end side in the Z direction (+Z side) of the first mating portion is the fourth side. It is sufficient if there is a space S separated from the interior of the case 30 at the end of the fourth side between the first mating portion and the second mating portion.

[0053] In the embodiment, the upper case 20 is inserted on the -R side of the main case 10. Alternatively, the main case 10 may be inserted on the -R side of the upper case 20. In this case, the fitting portion of the upper case 20 is the first fitting portion, and the fitting portion of the main case 10 is the second fitting portion. The tip end side (-Z side) of the first fitting portion in the Z direction is the third side, and the base end side (+Z side) of the first fitting portion in the Z direction is the fourth side. It is sufficient if there is a space S separated from the interior of the case 30 at the end of the fourth side between the first fitting portion and the second fitting portion.

[0054] According to at least one of the embodiments described above, the fourth end between the first fitting portion 12 and the second fitting portion 22 has a space S separated from the inside of the case 30. This makes it possible to suppress malfunctions of the compressor 90.

[0055] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, as well as within the scope of the invention described in the claims and their equivalents. [Explanation of symbols]

[0056] S...space, S1...first space, S2...second space, S3a, S3b...third space, 1...refrigeration cycle device, 4...first heat exchanger (heat radiator, heat absorber), 5...expansion device, 6...second heat exchanger (heat absorber, radiator), 10...main case, 12...first fitting portion (fitting portion), 13...recess, 14a, 14b...pocket portion, 15...groove portion, 20...upper case (end case), 22...second fitting portion (fitting portion), 23...C-chamfer (chamfer), 30...case, 34...step portion, 34e...step surface, 38...lower case (end case), 90...compressor, 92...compression mechanism portion, 93...electric motor.

Claims

1. a compression mechanism that compresses gas; an electric motor that drives the compression mechanism; a case that houses the compression mechanism and the electric motor, The case has a cylindrical main case and a bowl-shaped end case, the end case is joined to the main case, covering an opening at an axial end of the main case; the main case and the end case each have a fitting portion that overlaps when viewed in a radial direction of the main case, a first side is an outer side of the main case in the radial direction, and a second side is an inner side of the main case in the radial direction, one of the fitting portions of the main case and the end case that is disposed on the first side is referred to as a first fitting portion, and the other of the fitting portions of the end case that is disposed on the second side is referred to as a second fitting portion; When a tip end side of the first fitting portion in the axial direction is defined as a third side and a base end side of the first fitting portion in the axial direction is defined as a fourth side, the case has a space separated from the interior of the case at the fourth end between the first fitting portion and the second fitting portion; Compressor.

2. the case has a step portion on an inner periphery of the first fitting portion, the step portion has an inner diameter larger than that of the fourth side of the first fitting portion, and has a step surface at an end of the fourth side of the first fitting portion, an end surface on the fourth side of the second fitting portion abuts against the step surface; The compressor according to claim 1 .

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

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

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

6. the step portion has a groove portion recessed toward the first side in an intermediate portion in the axial direction, The compressor according to claim 3.

7. A compressor according to any one of claims 1 to 3; a radiator connected to the compressor; an expansion device connected to the heat sink; a heat sink connected between the expansion device and the compressor. Refrigeration cycle equipment.

Images