Compressor

Abstract

To provide a compressor capable of restraining thermal deterioration of an elastic body of a vibration control member mounted to a fitting foot.SOLUTION: The compressor comprises: a compression part 3 for compressing fluid; a housing 1 for housing the compression part 3; a fitting foot 25 projecting from an outer face of the housing 1 and having a mounting hole 31; and a vibration control member 41 mounted to the mounting hole 31. The vibration control member 41 has: an outer cylinder 43 held on an inner periphery 31a of the mounting hole 31; an inner cylinder 45, which is arranged inside the outer cylinder 43 and in which a fastening member 93 for fastening the fitting foot 25 to a mounting object 91 is inserted; and an elastic body 47 arranged between the outer cylinder 43 and the inner cylinder 45 and coupling them. A heat conduction restraining member 61 for restraining heat conduction to the outer cylinder 43 from the fitting foot 25 is arranged between the inner periphery 31a of the mounting hole 31 and an outer periphery 43a of the outer cylinder 43.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a compressor.

Background Art

[0002] Patent Document 1 discloses a conventional compressor. This compressor includes a compression part, a housing, mounting feet, and vibration isolation members.

[0003] The compression part compresses a fluid. The housing accommodates the compression part. The mounting feet protrude from the outer surface of the housing and have mounting holes. The vibration isolation members are attached to the mounting holes of the mounting feet.

[0004] The vibration isolation members have an outer cylinder, an inner cylinder, and an elastic body. The outer cylinder is held on the inner peripheral surface of the mounting hole. The inner cylinder is disposed inside the outer cylinder, and a fastening member for fastening the mounting feet to an object to be mounted is inserted therethrough. The elastic body is disposed between the outer cylinder and the inner cylinder and connects the two.

[0005] This compressor is fixed to a vehicle or the like by fastening the mounting feet to an object to be mounted such as a vehicle with a fastening member inserted through the inner cylinder of the vibration isolation member. During the operation of the compressor, vibrations generated in the compression part are absorbed by the elastic body of the vibration isolation member attached to the mounting hole. As a result, according to this compressor, it is possible to suppress the transmission of vibrations generated in the compression part to the object to be mounted on the vehicle.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] However, in the conventional compressor described above, during the operation of the compressor, since the fluid compressed in the compression part becomes hot, the heat of the hot fluid is transmitted to the vibration isolator through the housing that houses the compression part, and there is a problem that an elastic body such as rubber deteriorates due to heat. For example, if an elastic body such as rubber softens due to heat, the strength-reduced elastic body is likely to break. Also, if the elastic body hardens due to being exposed to high temperatures for a long time, the vibration isolation characteristics are likely to deteriorate.

[0008] The present invention has been made in view of the above-described conventional situation, and an object to be solved is to provide a compressor capable of suppressing thermal deterioration of an elastic body of a vibration isolator attached to a mounting foot.

Means for Solving the Problems

[0009] The compressor of the present invention includes a compression part that compresses a fluid, a housing that houses the compression part, a mounting foot that protrudes from the outer surface of the housing and has a mounting hole, and a vibration isolator attached to the mounting hole, The vibration isolator has an outer cylinder held on the inner peripheral surface of the mounting hole, an inner cylinder disposed inside the outer cylinder through which a fastening member for fastening the mounting foot to an object to be mounted is inserted, and an elastic body disposed between the outer cylinder and the inner cylinder and connecting the two. A heat conduction suppressing member for suppressing heat conduction from the mounting foot to the outer cylinder is disposed between the inner peripheral surface of the mounting hole and the outer peripheral surface of the outer cylinder.

[0010] In the compressor of the present invention, the outer cylinder of the vibration isolator is held on the inner peripheral surface of the mounting hole of the mounting foot, and a heat conduction suppressing member is disposed between the inner peripheral surface of this mounting hole and the outer peripheral surface of the outer cylinder. Therefore, the heat conduction suppressing member suppresses heat conduction from the mounting foot to the outer cylinder. As a result, it is possible to suppress heat from being transmitted from the mounting foot to the elastic body disposed inside the outer cylinder.

[0011] Therefore, according to the compressor of the present invention, it is possible to suppress thermal deterioration of the elastic body of the vibration isolator attached to the mounting foot.

[0012] The heat conduction suppressing member is preferably made of a low heat conduction material having a lower heat conductivity than the mounting leg.

[0013] In this case, even if the heat conduction suppressing member is brought into surface contact with both the inner peripheral surface of the mounting hole and the outer peripheral surface of the outer cylinder, heat conduction from the mounting leg to the outer cylinder can be suppressed at the contact portion. Therefore, heat conduction from the mounting leg to the elastic body of the vibration isolating member can be easily suppressed.

[0014] The heat conduction suppressing member preferably has an annular shape.

[0015] In this case, it is easy to set the heat conduction suppressing member on the inner peripheral surface of the mounting hole or the outer peripheral surface of the outer cylinder, and it is advantageous for mounting the vibration isolating member coaxially with respect to the mounting hole. In particular, in the case of a heat conduction suppressing member having a thickness (radial width) that is uniform in the circumferential direction, setting on the inner peripheral surface of the mounting hole or the outer peripheral surface of the outer cylinder becomes even easier, and the vibration isolating member can be mounted coaxially with respect to the mounting hole.

[0016] The heat conduction suppressing member preferably has an arc shape. And when the inner peripheral surface of the mounting hole is divided into two at the proximity inner peripheral surface close to the outer surface of the housing and the remote inner peripheral surface farther from the outer surface than the proximity inner peripheral surface in the axial direction view of the mounting hole, the heat conduction suppressing member is preferably disposed on the proximity inner peripheral surface.

[0017] In this case, while suppressing an increase in cost and weight, heat conduction from the mounting leg to the elastic body of the vibration isolating member can be suppressed.

[0018] It is preferable that a contact portion with which the heat conduction suppressing member abuts is provided at one end in the axial direction of the mounting hole in the mounting leg.

[0019] In this case, the heat conduction suppressing member inserted from the other axial end into the mounting hole abuts against the abutting portion, thereby restricting the heat conduction suppressing member from moving axially in one direction beyond the abutting portion. Therefore, it is possible to prevent the heat conduction suppressing member from coming out from one axial end of the mounting hole.

[0020] When the inner peripheral surface of the mounting hole is divided into two on the near inner peripheral surface close to the outer surface of the housing and the remote inner peripheral surface farther from the outer surface than the near inner peripheral surface in the axial view of the mounting hole, it is preferable that the abutting portion is provided on the remote inner peripheral surface.

[0021] In this case, heat is conducted from the mounting leg to the heat conduction suppressing member through the abutting portion, and then to the elastic body of the vibration damping member. In this regard, the inner peripheral surface of the mounting hole is at a lower temperature on the remote inner peripheral surface farther from the outer surface of the housing than on the near inner peripheral surface, and since the abutting portion is provided on the remote inner peripheral surface, heat is less likely to be conducted from the mounting leg to the vibration damping member through the abutting portion compared to the case where the abutting portion is provided on the near inner peripheral surface.

[0022] The heat conduction suppressing member preferably comprises a spring structure that elastically supports the vibration damping member with respect to the mounting hole. And it is preferable that the spring structure is partially in contact with at least one of the inner peripheral surface of the mounting hole and the outer peripheral surface of the outer cylinder.

[0023] In this case, since the spring structure is partially in contact with at least one of the inner peripheral surface of the mounting hole and the outer peripheral surface of the outer cylinder, heat conduction through the spring structure can be suppressed compared to the case of full contact. Therefore, heat conduction from the mounting leg to the elastic body of the vibration damping member can be suppressed. Also, due to the elastic action in the spring structure, an effect of absorbing vibration generated in the compression portion can be expected.

Advantages of the Invention

[0024] According to the compressor of the present invention, heat deterioration of the elastic body of the vibration damping member attached to the mounting leg can be suppressed.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Embodiments for Carrying Out the Invention

[0026] Hereinafter, Examples 1 to 3 embodying the present invention will be described with reference to the drawings.

[0027] (Example 1) The compressor of Example 1 is an example of a specific embodiment of the compressor of the present invention, and specifically is a scroll-type electric compressor. This compressor is mounted on a vehicle, for example, and used in a vehicle air conditioner.

[0028] As shown in FIG. 1, the compressor of Example 1 includes a metal housing 1, a compression section 3, an electric motor 5, a drive shaft 7, and an inverter 9. The housing 1 is made of, for example, an aluminum alloy.

[0029] The housing 1 has a discharge housing 11, a motor housing 13, and an inverter housing 15. The discharge housing 11 and the motor housing 13 have a generally cylindrical outer shape. The inverter housing 15 has a generally rectangular box-shaped outer shape.

[0030] In the following description, the side of the discharge housing 11 located on the left side in FIG. 1 is defined as the front side of the compressor. Also, the front-rear direction shown in FIG. 2 is displayed corresponding to FIG. 1. Note that the front-rear direction shown in FIG. 1 is an example, and the front-rear direction of the compressor is appropriately changed corresponding to the vehicle on which it is mounted.

[0031] The discharge housing 11, the motor housing 13, and the inverter housing 15 are integrally assembled while being arranged in this order from the front to the rear. A gasket 17 is provided between the discharge housing 11 and the motor housing 13. The gasket 17 is made of, for example, rubber or resin.

[0032] The discharge housing 11 has a peripheral wall extending cylindrically in the front-rear direction and a bottom wall connected to the front end of the peripheral wall, and forms a bottomed cylindrical shape with an open rear side. The motor housing 13 has a peripheral wall extending cylindrically in the front-rear direction and a bottom wall connected to the rear end of the peripheral wall, and forms a bottomed cylindrical shape with an open front side. The discharge housing 11 and the motor housing 13 are butted against each other so that their openings face each other, and are fastened by a plurality of bolts (not shown). The inverter housing 15 is fastened to the bottom wall of the motor housing 13 by a plurality of bolts (not shown).

[0033] The discharge housing 11 is provided with a discharge chamber 19 and a discharge port 21 that communicates the discharge chamber 19 with the outside. And a discharge pipe 23 is connected to the discharge port 21. Note that FIGS. 1 and 2 etc. partially show a part of the discharge pipe 23. The discharge pipe 23 is connected to a condenser (not shown).

[0034] Inside the motor housing 13, a shaft support member (not shown) and a fixed scroll (not shown) in front of the shaft support member are accommodated in a state of being in contact with each other. Also, a columnar drive shaft 7 extending in the front-rear direction is accommodated in the motor housing 13. The drive shaft 7 is rotatably supported around the drive axis by the bottom wall of the motor housing 13 and the shaft support member.

[0035] The motor housing 13 is provided with a suction port that communicates the inside of the motor housing 13 with the outside. The suction port is connected to the evaporator by a suction pipe. Note that the illustration of the suction port, the suction pipe, and the evaporator is omitted.

[0036] The compression section 3 is housed on the front side within the motor housing 13. Although not shown in the figure, the compression section 3 has a fixed scroll and a swivel scroll arranged opposite to the fixed scroll. The compression section 3 changes the volume of the compression chamber formed between the fixed scroll and the swivel scroll by rotating the swivel scroll due to the rotation of the drive shaft 7. Thereby, the compression section 3 compresses the refrigerant inhaled into the motor housing 13 from the suction port and discharges the compressed refrigerant into the discharge chamber 19. The high-temperature and high-pressure refrigerant discharged into the discharge chamber 19 flows out to the outside through the discharge port 21 and the discharge pipe 23. The refrigerant is an example of the "fluid" in the present invention.

[0037] The electric motor 5 is housed on the rear side within the motor housing 13. Although not shown in the figure, the electric motor 5 has a cylindrical stator and a rotor arranged inside the stator. The stator is fixed to the inner peripheral surface of the motor housing 13 and is connected to the inverter 9. The drive shaft 7 is fixed to the rotor. By rotating the rotor due to the power supply from the inverter 9 to the stator, the drive shaft 7 is rotated.

[0038] The inverter 9 is housed within the inverter housing 15. Although not shown in the figure, the inverter 9 has an inverter circuit and a control circuit. The inverter circuit drives the electric motor 5. The control circuit controls the inverter circuit. The inverter circuit and the control circuit are each constituted by a substrate, electronic components mounted on the substrate, switching elements, and the like.

[0039] As shown in FIGS. 1 and 2, the discharge housing 11 and the motor housing 13 are provided with three mounting feet 25. Note that in FIG. 2, two of the three mounting feet 25 are shown. One of the three mounting feet 25 is provided on the discharge housing 11, another one is provided at the rear of the motor housing 13, and the remaining one is provided at a position on the motor housing 13 where this compressor can be supported at three points.

[0040] Since the three mounting legs 25 have the same configuration, the configuration of the mounting leg 25 provided on the discharge housing 11 will be described, and the description of the configurations of the remaining two mounting legs 25 will be omitted.

[0041] The mounting leg 25 is made of metal and has a substantially rectangular base portion 27 and a substantially cylindrical tubular portion 29.

[0042] The base portion 27 is integrally formed on the outer peripheral surface 11a so as to protrude from the outer peripheral surface 11a of the discharge housing 11. Note that the base portions 27 of the remaining two mounting legs 25 are integrally provided on the outer peripheral surface 13a so as to protrude from the outer peripheral surface 13a of the motor housing 13.

[0043] The tubular portion 29 is connected to the base portion 27. Specifically, the tubular portion 29 is integrally formed at the protruding tip of the base portion 27 that protrudes from the outer peripheral surface 11a of the discharge housing 11.

[0044] As shown in FIG. 3, a mounting hole 31 having a circular cross-section with a central axis O is formed in the tubular portion 29. A semi-circular arc-shaped contact portion 33 is provided at one axial end of the mounting hole 31 in the tubular portion 29. The semi-circular arc-shaped contact portion 33 is an example of the "contact portion" in the present invention.

[0045] As shown in FIG. 4, which is an axial view of the vicinity of the mounting hole 31 in FIG. 3 as viewed from the other axial direction shown in FIG. 3, when the inner peripheral surface 31a of the mounting hole 31 is divided into two by a proximity inner peripheral surface 31b close to the outer peripheral surface 1a of the housing 1 and a remote inner peripheral surface 31c farther from the outer peripheral surface 1a than the proximity inner peripheral surface 31b in the axial view of the mounting hole 31, the semi-circular arc-shaped contact portion 33 is provided on the remote inner peripheral surface 31c. The semi-circular arc-shaped contact portion 33 extends in a semi-circular arc shape in the circumferential direction over the entire remote inner peripheral surface 31c. The inner diameter of the semi-circular arc-shaped contact portion 33 is smaller than the inner diameter of a resin ring 61 described later and is substantially equal to the inner diameter of an outer cylinder 43 described later.

[0046] As shown in FIGS. 3, 5, and 6, a resin ring 61 that suppresses heat conduction from the mounting leg 25 to the outer cylinder 43 is disposed between the inner peripheral surface 31a of the mounting hole 31 and the outer peripheral surface 43a of the outer cylinder 43 described later. The resin ring 61 is an example of the "heat conduction suppressing member" in the present invention.

[0047] The resin ring 61 is made of resin and is formed of a low heat conduction material having a lower heat conductivity than the metal mounting leg 25. The resin ring 61 has a cylindrical shape with a uniform wall thickness in the circumferential direction and an outer diameter equal to the inner diameter of the mounting hole 31. The resin ring 61 is set on the inner peripheral surface 31a of the mounting hole 31 before the damper 41 is mounted in the mounting hole 31. The resin ring 61 extends over the entire axial direction except for the portion of the semi-circular arc-shaped contact portion 33 in the mounting hole 31. One axial end surface of the resin ring 61 is in contact with the semi-circular arc-shaped contact portion 33.

[0048] As shown in FIGS. 1 and 6, a damper 41 is mounted in the mounting hole 31 of each mounting leg 25. The damper 41 is an example of the "vibration damping member" in the present invention. The resonance frequency of this damper 41 is set to a predetermined value by shaping the elastic body 47 described later. Therefore, when this compressor is mounted on a vehicle, this damper 41 exhibits the effect of reducing vibration transmission in a frequency region equal to or higher than the set resonance frequency.

[0049] In a state where the damper 41 is mounted in the mounting hole 31, the inner peripheral surface 61a of the resin ring 61 is in contact with the outer peripheral surface of the damper 41, specifically, the outer peripheral surface 43a of the outer cylinder 43 described later. Thereby, the central axis O of the mounting hole 31 and the central axis C of the damper 41 coincide, and the damper 41 is held coaxially in the mounting hole 31.

[0050] As shown in FIGS. 7 and 8, the damper 41 includes a cylindrical outer cylinder 43, a cylindrical inner cylinder 45 disposed inside the outer cylinder 43, a rubber elastic body 47, and a pair of regulating plates 49. The outer cylinder 43, the inner cylinder 45, and the regulating plate 49 are made of, for example, metal or synthetic resin.

[0051] The outer cylinder 43 and the inner cylinder 45 have a common central axis C, and the two are arranged coaxially. The inner cylinder 45 is axially longer than the outer cylinder 43 and protrudes from both sides of the outer cylinder 43 in the axial direction.

[0052] The elastic body 47 is disposed between the outer cylinder 43 and the inner cylinder 45 and connects the two. The elastic body 47 has a thin-walled cylindrical portion 51, a thick-walled cylindrical portion 53, and four connecting portions 55. The thin-walled cylindrical portion 51, the thick-walled cylindrical portion 53, and the four connecting portions 55 are integrally formed by vulcanization molding.

[0053] The thin-walled cylindrical portion 51 is formed in a thin film shape and adhered to the outer peripheral surface of the inner cylinder 45. The thick-walled cylindrical portion 53 is formed in a thicker film shape than the thin-walled cylindrical portion 51 and adhered to the inner peripheral surface of the outer cylinder 43. The thin-walled cylindrical portion 51 and the thick-walled cylindrical portion 53 have the same axial length as the outer cylinder 43.

[0054] The four connecting portions 55 are connected to the thin-walled cylindrical portion 51 and the thick-walled cylindrical portion 53 at the axial center positions of the thin-walled cylindrical portion 51 and the thick-walled cylindrical portion 53. The four connecting portions 55 are arranged at equal intervals in the circumferential direction of the thin-walled cylindrical portion 51. That is, each connecting portion 55 is arranged at intervals of 90 degrees in the circumferential direction. Each connecting portion 55 has a rectangular parallelepiped shape. Each connecting portion 55 has a longer radial length than the axial length.

[0055] A pair of regulating plates 49 are respectively adhered to the axial end faces of the inner cylinder 45. Each regulating plate 49 has a disc shape with an outer diameter slightly larger than that of the outer cylinder 43. Each regulating plate 49 has a through hole 49a with the same size as the inner diameter of the inner cylinder 45. The center of the through hole 49a is located on the central axis C of the inner cylinder 45.

[0056] When the damper 41 is mounted in the mounting hole 31, for example, after the restricting plate 49 inserts the integrated unit of the unbonded inner cylinder 45, outer cylinder 43, and elastic body 47 into the mounting hole 31, the restricting plate 49 is bonded to the axial end face of the inner cylinder 45 that protrudes in one axial direction from the semi-circular arc-shaped contact portion 33, and the restricting plate 49 is also bonded to the axial end face of the inner cylinder 45 that protrudes in the other axial direction from the mounting hole 31.

[0057] As shown in FIG. 1, this compressor is attached to the mounting target 91 by fastening each mounting leg 25 to the mounting target 91 with a fastening member 93 inserted through the inner cylinder 45 of the damper 41 attached to each mounting leg 25. In this mounted state, the elastic body 47 in the damper 41 absorbs vibrations in a predetermined frequency range generated in the compression section 3 during the operation of the compressor. Thereby, it is possible to suppress the transmission of the vibrations generated in the compression section 3 to the mounting target 91.

[0058] And in this compressor, the outer cylinder 43 of the damper 41 is held on the inner peripheral surface 31a of the mounting hole 31 of the mounting leg 25, and a resin ring 61 that abuts against the outer peripheral surface 43a of the outer cylinder 43 is provided on the inner peripheral surface 31a of this mounting hole 31. For this reason, the resin ring 61 is interposed between the inner peripheral surface 31a of the mounting hole 31 and the outer peripheral surface 43a of the outer cylinder 43. This resin ring 61 has lower thermal conductivity than the mounting leg 25. For this reason, the resin ring 61 suppresses the heat conduction from the mounting leg 25 to the outer cylinder 43. As a result, it is possible to suppress heat from being transmitted to the elastic body 47 disposed inside the outer cylinder 43 from the mounting leg 25.

[0059] Therefore, according to this compressor, it is possible to suppress the thermal degradation of the elastic body 47 of the damper 41 mounted on the mounting leg 25.

[0060] In particular, in this compressor, a discharge port 21 and a discharge pipe 23 are provided in a discharge housing 11, and one of mounting legs 25 is provided on the discharge housing 11. A damper 41 mounted on the mounting leg 25 disposed near the discharge pipe 23 or the like is likely to become hot due to the heat of the high-temperature refrigerant compressed in the compression section 3. In this regard, in this compressor, even for the damper 41 exposed to high temperatures, since heat is less likely to be transmitted to the elastic body 47, thermal degradation of the elastic body 47 can be suppressed.

[0061] Also, a connecting portion 55 of the elastic body 47 in the damper 41 is connected in the radial direction between a thin-walled cylindrical portion 51 on the inner peripheral side and a thick-walled cylindrical portion 53 on the outer peripheral side, and has a shape with a long radial connection length. For this reason, if the elastic body 47 in the damper 41 softens due to heat, it is likely to break at the connecting portion 55. In this regard, in this compressor, even when the damper 41 is exposed to high temperatures, the elastic body 47 can be suppressed from softening due to heat, so that breakage of the connecting portion 55 can be suppressed.

[0062] Furthermore, in this compressor, an annular resin ring 61 is interposed between the inner peripheral surface 31a of the mounting hole 31 and the outer peripheral surface 43a of the outer cylinder 43. And the entire inner and outer peripheral surfaces of the resin ring 61 are in surface contact with both the inner peripheral surface 31a of the mounting hole 31 and the outer peripheral surface 43a of the outer cylinder 43. Even in this case, since the resin ring 61 has lower thermal conductivity than the mounting leg 25, heat conduction from the mounting leg 25 to the outer cylinder 43 can be suppressed at the contact portion. For this reason, heat conduction from the mounting leg 25 to the damper 41 can be easily suppressed.

[0063] Moreover, since it is an annular resin ring 61, it is easy to set the resin ring 61 in the mounting hole 31. Also, since the thickness of the resin ring 61 is uniform in the circumferential direction, setting into the mounting hole 31 becomes even easier, and the damper 41 can be coaxially mounted with respect to the mounting hole 31.

[0064] Further, a semi-circular arc-shaped contact portion 33 with which the end face of the resin ring 61 abuts is provided at one end in the axial direction of the mounting hole 31 in the mounting leg 25. Therefore, when the damper 41 is mounted into the mounting hole 31, it is possible to prevent the resin ring 61 from coming out from one end in the axial direction of the mounting hole 31.

[0065] Moreover, in the axial direction view of the mounting hole 31, a semi-circular arc-shaped contact portion 33 is provided on the remote inner peripheral surface 31c far from the outer peripheral surface 1a of the housing 1. Therefore, compared with the case where the semi-circular arc-shaped contact portion 33 is provided on the proximity inner peripheral surface 31b, heat is less likely to be transmitted from the mounting leg 25 to the damper 41 through the semi-circular arc-shaped contact portion 33. As a result, thermal degradation of the elastic body 47 of the damper 41 can be further suppressed.

[0066] (Embodiment 2) The compressor of Embodiment 2 is different from the compressor of Embodiment 1 in that the shape of the inner peripheral surface 31a of the mounting hole 31, the shape of the "heat conduction suppressing member" in the present invention, and the shape of the "contact portion" in the present invention are changed.

[0067] As shown in FIG. 9, in this compressor, a semi-circular arc-shaped recess 31d is formed in the inner peripheral surface 31a of the mounting hole 31. When the inner peripheral surface 31a is divided into two at the proximity inner peripheral surface 31b close to the outer peripheral surface 1a of the housing 1 and the remote inner peripheral surface 31c farther from the outer peripheral surface 1a than the proximity inner peripheral surface 31b, the semi-circular arc-shaped recess 31d is provided on the proximity inner peripheral surface 31b. The semi-circular arc-shaped recess 31d has an inner diameter larger than the inner diameter of the mounting hole 31, and extends in a semi-circular arc shape in the circumferential direction over the entire proximity inner peripheral surface 31b coaxially with the central axis O of the mounting hole 31. Further, the semi-circular arc-shaped recess 31d extends over the entire axial direction except for the portion of an annular contact portion 35 described later in the mounting hole 31.

[0068] As shown in FIGS. 10 and 11, an annular contact portion 35 is provided at one axial end of the mounting hole 31 in the cylindrical portion 29. The annular contact portion 35 is an example of the "contact portion" in the present invention. The annular contact portion 35 extends in an arc shape in the circumferential direction over the entire inner peripheral surface 31a of the mounting hole 31. The inner diameter of the annular contact portion 35 is smaller than the inner diameter of the semi-circular arc body 63 described later, and is substantially equal to the inner diameter of the outer cylinder 43 of the damper 41.

[0069] As shown in FIGS. 10, 12, and 13, a semi-circular arc body 63 made of synthetic resin for suppressing heat conduction from the mounting leg 25 to the outer cylinder 43 is provided in a semi-circular arc-shaped recess 31d on the inner peripheral surface 31a of the mounting hole 31. The semi-circular arc body 63 is an example of the "heat conduction suppressing member" in the present invention.

[0070] The semi-circular arc body 63 is disposed over the entire semi-circular arc-shaped recess 31d and extends in a semi-circular arc shape. The semi-circular arc body 63 has an outer diameter equal to the inner diameter of the semi-circular arc-shaped recess 31d and an inner diameter equal to the inner diameter of the remote inner peripheral surface 31c on the inner peripheral surface 31a of the mounting hole 31. The semi-circular arc body 63 is set in the semi-circular arc-shaped recess 31d before the damper 41 is mounted in the mounting hole 31.

[0071] In a state where the damper 41 is mounted in the mounting hole 31, the semi-circular arc body 63 is disposed between the inner peripheral surface of the semi-circular arc-shaped recess 31d on the inner peripheral surface 31a of the mounting hole 31 and the outer peripheral surface 43a of the outer cylinder 43. In this mounted state, the outer peripheral surface 43a of the outer cylinder 43 is in contact with the entire remote inner peripheral surface 31c on the inner peripheral surface 31a of the mounting hole 31 and the entire inner peripheral surface of the semi-circular arc body 63.

[0072] The semi-circular arc body 63 extends over the entire axial direction except for the portion of the annular contact portion 35 in the mounting hole 31. One axial end face of the semi-circular arc body 63 is in contact with the annular contact portion 35.

[0073] In this compressor, a semi-circular arc body 63 is provided on the inner peripheral surface 31a of the mounting hole 31 on the side of the proximity inner peripheral surface 31b where heat is easily transmitted from the housing 1. Therefore, the size of the semi-circular arc body 63 as the heat conduction suppressing member in the present invention can be set to about half of that of the resin ring 61 in the first embodiment. As a result, while suppressing an increase in cost and weight, heat conduction from the mounting leg 25 to the elastic body 47 of the damper 41 can be suppressed.

[0074] Other configurations, operations, and effects are the same as those in the first embodiment.

[0075] (Embodiment 3) The compressor of the third embodiment changes the "heat conduction suppressing member" in the present invention in the compressor of the first embodiment.

[0076] As shown in FIG. 14, in this compressor, a substantially cylindrical tolerance ring 65 is disposed between the inner peripheral surface 31a of the mounting hole 31 and the outer peripheral surface 43a of the outer cylinder 43. The tolerance ring 65 is an example of the "heat conduction suppressing member" in the present invention.

[0077] The tolerance ring 65 is formed of a spring structure body obtained by bending a band-shaped metal plate that can be elastically deformed, such as by bending. The tolerance ring 65 has a C-shaped portion 67 bent in a C shape and a corrugated spring portion 69 disposed inside the C-shaped portion 67 and bent in a wave shape. The entire outer peripheral surface of the C-shaped portion 67 is in contact with the inner peripheral surface 31a of the mounting hole 31. The corrugated spring portion 69 has a protrusion protruding toward the inner peripheral side in contact with the outer peripheral surface 43a of the outer cylinder of the damper 41 mounted inside the tolerance ring 65.

[0078] In this way, the tolerance ring 65 elastically supports the damper 41 with respect to the mounting hole 31 by the corrugated spring portion 69 that can be elastically deformed in the circumferential direction and the radial direction of the mounting hole 31 being partially in contact with the outer peripheral surface 43a of the outer cylinder.

[0079] In this compressor, since the corrugated spring portion 69 of the tolerance ring 65 partially contacts the outer peripheral surface 43a of the outer cylinder 43, heat conduction through the tolerance ring 65 can be suppressed as compared with the case of full contact. Therefore, heat conduction from the mounting leg 25 to the elastic body 47 of the damper 41 can be suppressed. Further, due to the elastic action in the corrugated spring portion 69, an effect of absorbing vibration generated in the compression portion 3 can also be expected.

[0080] Other configurations and effects are the same as those in the first embodiment.

[0081] In the above, the present invention has been described with reference to the first to third embodiments. However, it goes without saying that the present invention is not limited to the above first to third embodiments and can be appropriately modified and applied without departing from the gist thereof.

[0082] In the first to third embodiments, the damper 41 having the elastic body 47 having a predetermined shape so as to have a predetermined resonance frequency is adopted as the vibration isolation member. However, the present invention is not limited to this, and various vibration isolation members having an elastic body that is easily thermally deteriorated can be used.

[0083] In the first embodiment, the resin ring 61 as the heat conduction suppressing member is provided on the inner peripheral surface 31a of the mounting hole 31. However, the present invention is not limited to this. For example, a heat conduction suppressing member may be provided on the outer peripheral surface of the outer cylinder of the vibration isolation member.

[0084] The following technical ideas can be extracted from the disclosure of the specification and drawings.

[0085] (Appendix 1) A compression portion that compresses a fluid, A housing that houses the compression portion, A mounting leg that protrudes from the outer surface of the housing and has a mounting hole, A vibration isolation member mounted in the mounting hole, The vibration damping member includes an outer cylinder held on the inner peripheral surface of the mounting hole, an inner cylinder disposed inside the outer cylinder through which a fastening member for fastening the mounting leg to the object to be mounted is inserted, and an elastic body disposed between the outer cylinder and the inner cylinder to connect the two. The compressor is characterized in that a heat conduction suppressing member for suppressing heat conduction from the mounting leg to the outer cylinder is disposed between the inner peripheral surface of the mounting hole and the outer peripheral surface of the outer cylinder.

[0086] (Appendix 2) The compressor according to Appendix 1, wherein the heat conduction suppressing member is made of a low heat conduction material having a lower heat conductivity than the mounting leg.

[0087] (Appendix 3) The compressor according to Appendix 1 or 2, wherein the heat conduction suppressing member has an annular shape.

[0088] (Appendix 4) The heat conduction suppressing member has an arc shape, When the inner peripheral surface of the mounting hole is divided into two on the near inner peripheral surface close to the outer surface of the housing and the remote inner peripheral surface farther from the outer surface than the near inner peripheral surface in the axial direction view of the mounting hole, the heat conduction suppressing member is disposed on the near inner peripheral surface. The compressor according to any one of Appendices 1 to 3.

[0089] (Appendix 5) The compressor according to any one of Appendices 1 to 4, wherein a contact portion with which the heat conduction suppressing member abuts is provided at one end in the axial direction of the mounting hole in the mounting leg.

[0090] (Appendix 6) When the inner peripheral surface of the mounting hole is divided into two on the near inner peripheral surface close to the outer surface of the housing and the remote inner peripheral surface farther from the outer surface than the near inner peripheral surface in the axial direction view of the mounting hole, the contact portion is provided on the remote inner peripheral surface. The compressor according to Appendix 5.

[0091] (Appendix 7) The heat conduction suppressing member is formed of a spring structure that elastically supports the vibration damping member with respect to the mounting hole. The spring structure partially abuts against at least one of the inner peripheral surface of the mounting hole and the outer peripheral surface of the outer cylinder, and the compressor according to any one of Appendices 1 to 3, Appendix 5, or Appendix 6.

Industrial Applicability

[0092] The present invention can be used in air conditioners for vehicles and the like.

Explanation of Signs

[0093] 1... Housing 3... Compression part 21... Discharge port 25... Mounting leg 31... Mounting hole 31a... Inner peripheral surface 31b... Proximate inner peripheral surface 31c... Remote inner peripheral surface 33... Semi-circular arc contact part (contact part) 35... Annular contact part (contact part) 41... Damper (vibration isolation member) 43... Outer cylinder 43a... Outer peripheral surface 45... Inner cylinder 47... Elastic body 61... Resin ring (heat conduction suppression member) 63... Semi-circular arc body (heat conduction suppression member) 65... Tolerance ring (heat conduction suppression member) 91... Object to be mounted 93... Fastening member

Claims

1. a compression part for compressing a fluid; a housing for housing the compression part; a mounting leg protruding from an outer surface of the housing and having a mounting hole; a vibration isolation member mounted in the mounting hole, and comprising: an outer cylinder held on an inner peripheral surface of the mounting hole; an inner cylinder disposed inside the outer cylinder and through which a fastening member for fastening the mounting leg to an object to be mounted is inserted; an elastic body disposed between the outer cylinder and the inner cylinder and connecting both of them; a heat conduction suppressing member for suppressing heat conduction from the mounting leg to the outer cylinder is disposed between the inner peripheral surface of the mounting hole and the outer peripheral surface of the outer cylinder. A compressor characterized by this.

2. The compressor according to claim 1, wherein the heat conduction suppressing member is made of a low heat conduction material having a lower heat conductivity than the mounting leg.

3. The compressor according to claim 1 or 2, wherein the heat conduction suppressing member has an annular shape.

4. The heat conduction suppressing member has an arc shape, and when the inner peripheral surface of the mounting hole is divided into two on a proximal inner peripheral surface close to the outer surface of the housing and a distal inner peripheral surface farther from the outer surface than the proximal inner peripheral surface in an axial view of the mounting hole, the heat conduction suppressing member is disposed on the proximal inner peripheral surface. The compressor according to claim 1 or 2.

5. The compressor according to claim 1 or 2, wherein a contact portion with which the heat conduction suppressing member contacts is provided at one end in the axial direction of the mounting hole in the mounting leg.

6. When the inner peripheral surface of the mounting hole is divided into two on a proximal inner peripheral surface close to the outer surface of the housing and a distal inner peripheral surface farther from the outer surface than the proximal inner peripheral surface in an axial view of the mounting hole, the contact portion is provided on the distal inner peripheral surface. The compressor according to claim 5.

7. The heat conduction suppressing member is a spring structure that elastically supports the vibration isolation member with respect to the mounting hole, and the spring structure is partially in contact with at least one of the inner peripheral surface of the mounting hole and the outer peripheral surface of the outer cylinder. The compressor according to claim 1 or 2.

Images