Compressor and refrigeration cycle apparatus

Abstract

To provide a compressor and a refrigerating cycle device capable of suppressing operation failure.SOLUTION: A compressor according to a first aspect of an embodiment includes a compression mechanism, 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. A round chamfer is formed on at least one of a first corner part on a third side of an inner periphery of the first fitting part and a second corner part on a fourth side of an outer periphery of the second fitting part.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 Publication No. 2019-19714 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 according to Embodiment Aspect 1 has a compression mechanism section, an electric motor, and a case. The compression mechanism section compresses gas. The electric motor drives the compression mechanism section. The case houses the compression mechanism section and the electric motor. The case has a cylindrical main case and a bowl-shaped end case. The end case covers an opening at an axial end of the main case and is joined to the main case. The main case and the end case each have a fitting portion that overlaps when viewed from the radial direction of the main case. Taking the outer side in the radial direction of the main case as the first side and the inner side in the radial direction as the second side. Of the fitting portion of the main case and the fitting portion of the end case, the one arranged on the first side is taken as the first fitting portion, and the one arranged on the second side is taken as the second fitting portion. Taking the tip side in the axial direction of the first fitting portion as the third side and the base end side in the axial direction of the first fitting portion as the fourth side. An R chamfer is formed on at least one of a first corner portion on the third side of the inner circumference of the first fitting portion and a second corner portion on the fourth side of the outer circumference of the second fitting portion.

[0006] The compressor according to Embodiment Aspect 2 is premised on the compressor according to Aspect 1. A first R chamfer is formed on the first corner portion, and a second R chamfer is formed on the second corner portion.

[0007] The compressor according to Embodiment Aspect 3 is premised on the compressor according to Aspect 2. When the radial distance from the inner peripheral surface of the first fitting portion to the center of the first R chamfer is c1 and the radius of curvature of the first R chamfer is R1, c1 = R1 holds. When the radial size of the first R chamfer is a1 and the distance from the end face on the third side of the first fitting portion to the center of the first R chamfer is b1, a1 < b1 holds. When the radial distance from the outer peripheral surface of the second fitting portion to the center of the second R chamfer is c2 and the radius of curvature of the second R chamfer is R2, c2 = R2 holds. When the radial size of the second R chamfer is a2 and the distance from the end face on the fourth side of the second fitting portion to the center of the second R chamfer is b2, a2 < b2 holds.

[0008] The compressor according to Embodiment Aspect 4 is based on the compressor described in Aspect 2 or 3. The case has a first stepped portion formed on the inner circumference of the first fitting portion or a second stepped portion formed on the outer circumference of the second fitting portion. The first stepped portion has a larger inner diameter than the fourth side of the first fitting portion and has a first stepped surface at the end of the fourth side of the first fitting portion. The second stepped portion has a smaller outer diameter than the third side of the second fitting portion and has a second stepped surface at the end of the third side of the second fitting portion. When the case has the first stepped portion, the radial width of the first stepped surface is e1, and the radial size of the second chamfer is a2, a2 < e1 holds. When the case has the second stepped portion, the radial width of the second stepped surface is e2, and the radial size of the first chamfer is a1, a1 < e2 holds. When the distance from the end surface on the third side of the first fitting portion to the center of the first chamfer is b1, the distance from the end surface on the fourth side of the second fitting portion to the center of the second chamfer is b2, and the axial length of the first stepped portion and the second stepped portion is h, b1 < h / 2 and b2 < h / 2 hold.

[0009] The compressor according to Embodiment Aspect 5 is based on the compressor described in Aspect 4. When the case has the first stepped portion and the radial size of the first chamfer is a1, 0.3 mm < a1 holds. When the case has the second stepped portion and the radial size of the second chamfer is a2, 0.3 mm < a2 holds.

[0010] The compressor according to Embodiment Aspect 6 is based on the compressor described in any one of Aspects 1 to 5. The first fitting portion is the fitting portion of the main case, and the second fitting portion is the fitting portion of the end case.

[0011] The refrigeration cycle device according to the embodiment has a compressor described in any one of Aspects 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.

Brief Description of the Drawings

[0012] [Figure 1] Circuit diagram of the refrigeration cycle device and side view of the compressor. [Figure 2] Enlarged view of the cross-section of part E in FIG. 1. [Figure 3] Exploded view of the main case and upper case. [Figure 4] An explanatory diagram of how the case is joined. [Figure 5] FIG. 4 is an explanatory diagram of a state in which the first fitting portion and the second fitting portion are in contact with each other. [Figure 6] FIG. 4 is an enlarged view of a state in which a first fitting portion and a second fitting portion are in contact with each other in the embodiment. [Figure 7] FIG. 10 is an enlarged view of a contact state between a first fitting portion and a second fitting portion in a comparative embodiment. 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] 2 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 fitting portion that overlaps when viewed from the R direction. Among these, the fitting portion arranged on the +R side is defined as the first fitting portion, and the fitting portion arranged on the -R side is defined as the second fitting portion. In the example of FIG. 2, the fitting portion of the main case 10 arranged on the +R side is the first fitting portion 12, and the fitting portion of the upper case 20 arranged on the -R side is the second fitting portion 22. Also, the tip side in the Z direction of the first fitting portion is defined as the third side, and the base end side in the Z direction of the first fitting portion is defined as the fourth side. In the example of FIG. 2, the +Z side, which is the tip side of the first fitting portion 12, is the third side, and the -Z side, which is the base end side of the first fitting portion 12, is the fourth side.

[0023] FIG. 3 is an exploded view of the main case 10 and the upper case 20. The case 30 has a first step portion formed on the inner circumference of the first fitting portion or a second step portion formed on the outer circumference of the second fitting portion. In the example of FIG. 3, the case 30 has a step portion (second step portion) 34 formed on the outer circumference of the second fitting portion 22 of the upper case 20. The outer diameter D2 of the step portion 34 of the second fitting portion 22 is smaller than the outer diameter of the upper case 20 on the +Z side of the second fitting portion 22. A step is formed between the outer circumference of the upper case 20 on the +Z side of the second fitting portion 22 and the outer circumference of the step portion 34 of the second fitting portion 22. A step surface (second step surface) 34e facing the -Z side is formed at the +Z side end of the second fitting portion 22.

[0024] The outer diameter D2 of the step portion 34 of the second fitting portion 22 is smaller than the inner diameter D1 of the first fitting portion 12. The step portion 34 of the second fitting portion 22 is inserted into the -R side of the first fitting portion 12. A first chamfer 13 is formed at the first corner portion on the +Z side of the inner circumference of the first fitting portion 12. The size a1 of the first 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. Thereby, the end surface on the +Z side of the first fitting portion 12 abuts against the step surface 34e. As a result, the main case 10 and the upper case 20 are positioned in the Z direction.

[0025] A second chamfer 23 is formed at a second corner on the -Z side of the outer periphery of the step portion 34 of the second fitting portion 22. The size a2 in the R direction of the second chamfer 23 is equal to or greater than the size a1 in the R direction of the first chamfer 13. The size a2 in the R direction of the second chamfer 23 is greater than 0.3 mm. That is, 0.3 mm < a2 holds.

[0026] 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 chamfer 13 is equal to the first radius of curvature R1 of the first chamfer 13. That is, c1 = R1 holds. Also, the distance b1 from the end face on the +Z side of the first fitting portion 12 to the center 13c of the first chamfer 13 is greater than the size a1 in the R direction of the first chamfer 13. That is, a1 < b1 holds. Thus, at the first connection portion 14 between the end portion on the -Z side of the first chamfer 13 and the inner peripheral surface of the first fitting portion 12, the two are smoothly and continuously connected.

[0027] The distance c2 in the R direction from the outer peripheral surface of the step portion 34 of the second fitting portion 22 to the center 23c of the second chamfer 23 is equal to the second radius of curvature R2 of the second chamfer 23. That is, c2 = R2 holds. Also, the distance b2 from the end face on the -Z side of the second fitting portion 22 to the center 23c of the second chamfer 23 is greater than the size a2 in the R direction of the second chamfer 23. That is, a2 < b2 holds. Thus, at the second connection portion 24 between the end portion on the +Z side of the second chamfer 23 and the outer peripheral surface of the step portion 34 of the second fitting portion 22, the two are smoothly and continuously connected.

[0028] The distance b1 from the end face on the +Z side of the first fitting portion 12 to the center 13c of the first chamfer 13 is smaller than half of the length h in the Z direction of the step portion 34. That is, b1 < h / 2 holds. Also, the distance b2 from the end face on the -Z side of the second fitting portion 22 to the center 23c of the second chamfer 23 is smaller than half of the length h in the Z direction of the step portion 34. That is, b2 < h / 2 holds. Thus, the inner peripheral surface of the first fitting portion 12 and the outer peripheral surface of the step portion 34 of the second fitting portion 22 are in surface contact with each other. Therefore, the fitting stability in the R direction of the first fitting portion 12 and the second fitting portion 22 is increased.

[0029] FIG. 4 is an explanatory diagram of a method for joining the cases 30. The second mating portion 22 of the upper case 20 is inserted into the -R side of the first mating portion 12 of the main case 10. As described above, the outer diameter D2 of the stepped portion 34 of the second mating portion 22 is smaller than the inner diameter D1 of the first mating 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 roundness. 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.

[0030] 5 is an explanatory diagram of the contact state between the first fitting portion 12 and the second fitting portion 22. When the upper case 20 is inserted into the main case 10 in a tilted state, the second corner on the −Z side of the outer periphery of the second fitting portion 22 contacts the first corner on the +Z side of the inner periphery of the first fitting portion 12.

[0031] Fig. 7 is an enlarged view of the abutting state of the first fitting portion 12 and the second fitting portion 22 in a comparative embodiment. Fig. 7 is an enlarged view of a portion corresponding to portion F in Fig. 5. In the comparative embodiment, C-chamfers (flat chamfers, tapered chamfers) are formed at both the first corner and the second corner. A first C-chamfer 13p is formed at the first corner, and a second C-chamfer 23p is formed at the second corner.

[0032] A discontinuous corner is formed at a second connection portion 24p between the +Z side end of the second C-chamfer 23p and the outer peripheral surface of the step portion 34 of the second fitting portion 22. A discontinuous corner is formed at a first connection portion 14p between the -Z side end of the first C-chamfer 13p and the inner peripheral surface of the first fitting portion 12.

[0033] When upper case 20 is inserted into main case 10, second connection portion 24p and first connection portion 14p rub against each other. This causes corners of second connection portion 24p and / or first connection portion 14p to be scraped off, generating iron scraps and iron powder (referred to as iron scraps, etc.). The generated iron scraps, etc. may cause malfunctions inside case 30, such as poor lubrication of compression mechanism 92 and poor insulation of electric motor 93.

[0034] FIG. 6 is an enlarged view of the first fitting portion 12 and the second fitting portion 22 in contact with each other in this embodiment. FIG. 6 is an enlarged view of portion F in FIG. 5. When the upper case 20 is inserted into the main case 10, the second connecting portion 24 and the first connecting portion 14 rub against each other. In the second connecting portion 24, the second R chamfer 23 and the outer peripheral surface of the step portion 34 of the second fitting portion 22 are smoothly and continuously connected. In the first connecting portion 14, the first R chamfer 13 and the inner peripheral surface of the first fitting portion 12 are smoothly and continuously connected. Therefore, even if the second connecting portion 24 and the first connecting portion 14 rub against each other, iron chips and the like are unlikely to be generated. This reduces the occurrence of malfunctions of the compressor.

[0035] 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 is rounded. In this case, at least one of the first connecting portion 14 and the second connecting portion 24 becomes a smoothly continuous connecting portion. This prevents the generation of iron chips and the like even if the second connecting portion 24 and the first connecting portion 14 rub against each other.

[0036] A corner 25 is formed between the -Z side end face of the second fitting portion 22 and the second R-chamfer 23. As described above, the size a2 (see FIG. 3) of the second R-chamfer 23 in the R direction is greater than 0.3 mm. This prevents the corner 25 from coming into contact with the first fitting portion 12.

[0037] As described above in detail, the compressor 90 of this embodiment has a compression mechanism 92, an electric motor 93, and a 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 the opening at the end of the main case 10 in the Z direction and is joined to the main case 10. The main case 10 and the upper case 20 each have mating portions 12, 22 that overlap when viewed from the R direction. The outer side in the R direction is the +R side, and the inner side in the R direction is the -R side. Of the mating portion 12 of the main case 10 and the mating portion 22 of the upper case 20, the one located on the +R side is referred to as the first mating portion 12, and the one located on the -R side is referred to as the second mating portion 22. The tip side (+Z side) in the Z direction of the first fitting portion 12 is the third side, and the base side (-Z side) in the Z direction of the first fitting portion 12 is the fourth side. A rounded chamfer is formed on at least one of a first corner on the third side of the inner periphery of the first fitting portion 12 and a second corner on the fourth side of the outer periphery of the second fitting portion 22.

[0038] When the first fitting portion 12 and the second fitting portion 22 are fitted together, the R-chamfer formed on at least one of the first corner portion and the second corner portion rubs against the other corner portion, thereby suppressing the generation of iron chips and the like, thereby suppressing malfunctions of the compressor 90.

[0039] A first R chamfer 13 is formed at the first corner, and a second R chamfer 14 is formed at the second corner. By forming R-chamfers on both the first corner and the second corner, the generation of iron scraps and the like is effectively suppressed.

[0040] Let the distance in the R direction from the inner peripheral surface of the first fitting portion 12 to the center 13c of the first chamfer 13 be c1. Let the first radius of curvature of the first chamfer 13 be R1. At this time, c1 = R1 holds. Let the size of the first chamfer 13 in the R direction be a1. Let the distance from the +Z side end face of the first fitting portion 12 to the center 13c of the first chamfer 13 be b1. At this time, a1 < b1 holds. Thereby, at the first connection portion 14 between the -Z side end portion of the first chamfer 13 and the inner peripheral surface of the first fitting portion 12, the two are smoothly and continuously connected.

[0041] Let the distance in the R direction from the outer peripheral surface of the second fitting portion 22 to the center 23c of the second chamfer 23 be c2. Let the second radius of curvature of the second chamfer 23 be R2. At this time, c2 = R2 holds. Let the size of the second chamfer 23 in the R direction be a2. Let the distance from the -Z side end face of the second fitting portion 22 to the center 23c of the second chamfer 23 be b2. At this time, a2 < b2 holds. Thereby, at the second connection portion 24 between the +Z side end portion of the second chamfer 23 and the outer peripheral surface of the stepped portion 34 of the second fitting portion 22, the two are smoothly and continuously connected.

[0042] The surfaces of the first connection portion 14 and the second connection portion 24 are smoothly continuous. Therefore, when the first fitting portion 12 and the second fitting portion 22 are fitted, even if the first connection portion 14 and the second connection portion 24 rub against each other, it is difficult for iron filings, etc. to be generated. Thereby, the occurrence of malfunction of the compressor is suppressed.

[0043] The case 30 has a stepped portion 34 formed on the outer periphery of the second fitting portion 22. The stepped portion 34 has an outer diameter smaller than that on the +Z side of the second fitting portion 22 and has a stepped surface 34e at the +Z side end of the second fitting portion 22. Let the width in the R direction of the stepped surface 34e be e2, and the size of the first chamfer 13 in the R direction be a1. At this time, a1 < e2 holds. Let the distance from the +Z side end face of the first fitting portion 12 to the center 13c of the first chamfer 13 be b1. Let the distance from the -Z side end face of the second fitting portion 22 to the center 23c of the second chamfer 23 be b2. Let the length in the Z direction of the stepped portion 34 be h. At this time, b1 < h / 2 and b2 < h / 2 hold. As a result, the fitting stability in the Z direction and the R direction of the first fitting portion 12 and the second fitting portion 22 is enhanced.

[0044] When the size in the R direction of the second chamfer 23 is a2, 0.3 mm < a2 holds. Even if a corner portion 25 is formed between the end surface on the -Z side of the second fitting portion 22 and the second chamfer 23, the contact between the corner portion 25 and the first fitting portion 12 is suppressed. Thereby, the generation of iron filings and the like is suppressed.

[0045] The first fitting portion 12 is a fitting portion of the main case 10. The second fitting portion 22 is a fitting portion of the upper case 20. A welding bead 31 by fillet welding is formed at the corner between the end surface on the +Z side of the main case 10 and the outer peripheral surface of the upper case 20. The fillet welding work can be carried out from the +Z side of the main case 10, and the fillet welding work is easy.

[0046] The refrigeration cycle device 1 of the embodiment includes the compressor 90 described above, the radiators 4, 6 connected to the compressor 90, the expansion device 5 connected to the radiators 4, 6, and the absorbers 6, 4 connected between the expansion device 5 and the compressor 90. The refrigeration cycle device 1 has a compressor 90 in which the occurrence of malfunction is suppressed. Thereby, the reliability of the refrigeration cycle device 1 is enhanced.

[0047] The technology regarding the joining of the main case 10 and the upper case 20 detailed in the embodiment may be applied to the joining of the main case 10 and the lower case (end case) 38. When the lower case 38 is inserted on the -R side of the main case 10, the fitting portion of the main case 10 is the first fitting portion, and the fitting portion of the lower case 38 is the second fitting portion. The tip side (-Z side) in the Z direction of the first fitting portion is defined as the third side, and the base end side (+Z side) in the Z direction of the first fitting portion is defined as the fourth side. It is sufficient that an R chamfer is 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.

[0048] In the embodiment, the upper case 20 is inserted on the -R side of the main case 10. On the contrary, 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 side (-Z side) in the Z direction of the first fitting portion is the third side, and the base end side (+Z side) in the Z direction of the first fitting portion is the fourth side. It is sufficient that chamferring of R is 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.

[0049] The case 30 of the embodiment has a stepped portion (second stepped portion) 34 formed on the outer periphery of the second fitting portion 22. On the contrary, the case 30 may have a first stepped portion formed on the inner periphery of the first fitting portion 12. The first stepped portion has an inner diameter larger than that on the fourth side of the first fitting portion 12 and has a first stepped surface at the end on the fourth side of the first fitting portion 12. When the width in the R direction of the first stepped surface is e1 and the size in the R direction of the second chamferring 23 is a2, a2 < e1 holds. When the size in the R direction of the first chamferring 13 is a1, 0.3 mm < a1 holds.

[0050] According to at least one embodiment described above, chamferring of R is provided on at least one of the first corner portion and the second corner portion. Thereby, malfunction of the compressor 90 can be suppressed.

[0051] Although some 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, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalent scope thereof.

Description of Reference Numerals

[0052] 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...first R chamfer (R chamfer), 20...upper case (end case), 22...second fitting portion (fitting portion), 23...second R chamfer (R chamfer), 30...case, 34...step portion (second step portion), 34e...step surface (second 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, a rounded chamfer is formed on at least one of a first corner on the third side of an inner periphery of the first fitting portion and a second corner on the fourth side of an outer periphery of the second fitting portion; Compressor.

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

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

4. the case has a first step portion formed on an inner periphery of the first fitting portion or a second step portion formed on an outer periphery of the second fitting portion, the first step portion has an inner diameter larger than that of the fourth side of the first fitting portion, and has a first step surface at an end of the fourth side of the first fitting portion; the second step portion has an outer diameter smaller than that of the second fitting portion on the third side, and has a second step surface at an end of the second fitting portion on the third side; the case has the first step portion, the width of the first step surface in the radial direction is e1, and the size of the second R-chamfer in the radial direction is a2, where a2<e1 holds; the case has the second step portion, the width of the second step surface in the radial direction is defined as e2, and the size of the first R-chamfer in the radial direction is defined as a1, where a1<e2 holds; When a distance from the end surface on the third side of the first fitting portion to the center of the first R-chamfer is defined as b1, a distance from the end surface on the fourth side of the second fitting portion to the center of the second R-chamfer is defined as b2, and a length in the axial direction of the first step portion and the second step portion is defined as h, b1<h / 2 and b2<h / 2 are satisfied. The compressor according to claim 2 or 3.

5. the case has the first step portion, and when the radial size of the first R chamfer is a1, 0.3 mm<a1 holds; the case has the second step portion, and when the radial size of the second R chamfer is a2, 0.3 mm<a2 holds. The compressor according to claim 4.

6. the first fitting portion is a fitting portion of the main case, the second fitting portion is a fitting portion of the end case; The compressor according to claim 1 or 2.

7. The compressor according to claim 1 or 2; 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.

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