JP5403004B2 - Electric compressor - Google Patents

Description

  The present invention relates to an electric compressor.

  Patent Document 1 discloses a conventional electric compressor. The electric compressor includes a compression mechanism that compresses refrigerant, a motor mechanism that operates the compression mechanism, an inner housing that houses the compression mechanism and the motor mechanism in a sealed state, and an outer housing that houses the inner housing. .

  In the inner housing, a suction port through which the refrigerant is sucked into the compression mechanism and a discharge port through which the refrigerant is discharged from the compression mechanism are formed, and an external pipe connected to the suction port and the discharge port is fixed. The outer housing is in contact with external piping extending to the outside.

  The electric compressor includes a spring that supports the inner housing in the outer housing, and a thixotropic fluid that is injected into a space defined between the outer housing and the inner housing. A mounting portion to the outside (object) is formed in the outer housing.

  This electric compressor can suppress vibration and noise from the compression mechanism and the motor mechanism from being transmitted to the outside by the spring and the thixotropic fluid.

JP 11-294365 A

  However, in the conventional electric compressor, since the outer housing is in contact with the external piping, vibration and noise from the compression mechanism and the motor mechanism are between the outer housing and the external piping fixed to the inner housing. Will be transmitted. Further, the heat of the refrigerant compressed to a high temperature and high pressure by the compression mechanism is radiated from the outer housing via the inner housing and the spring, and is easily taken away by the thixotropic fluid via the inner housing. For this reason, in this electric compressor, the quantity of heat of the refrigerant is likely to decrease. For example, when used as a heat pump, it is difficult to exhibit sufficient heating capacity in a heat exchanger for heating.

  The present invention has been made in view of the above-described conventional situation, and provides an electric compressor that is difficult to transmit vibration and noise to the outside and that can exhibit sufficient heating capacity when used as a heat pump. Is a problem to be solved.

The electric compressor of the present invention is an electric compressor including a compression mechanism that compresses a refrigerant, and a motor mechanism that operates the compression mechanism.
An inner housing that accommodates the compression mechanism and the motor mechanism in a sealed state; and an outer housing that accommodates the inner housing and has an attachment portion that is fixed to an object by a fastening means;
The inner housing is formed with a suction port through which the refrigerant is sucked into the compression mechanism and a discharge port through which the refrigerant is discharged from the compression mechanism, and an external pipe connected to the suction port and the discharge port is fixed. And
Said outer housing is made of a material having a vibration-proof property and heat insulating property, Ri encapsulated possible and the external pipe and the non-contact state der the inner housing by being combined,
The mounting portion includes a first mounting portion and a second mounting portion,
The outer housing can contain the inner housing and is fixed to the object by inserting the fastening means into the first attachment part, the second attachment part and the object.
The outer housing includes a first housing member having the first mounting portion and a second housing member having the second mounting portion,
Between the inner housing and the outer housing, an intermediate material having vibration-proof properties and / or heat insulation properties is provided,
The first housing member is provided with the first mounting portion protruding on one side extending in the longitudinal direction,
It said second housing member, said second attachment portion on one side extending in the longitudinal direction shall be the features that you have been protrusively.

In the electric compressor according to the present invention, since the outer housing has vibration proofing and encloses the inner housing and is in a non-contact state with the external piping, vibration and noise from the compression mechanism and the motor mechanism are generated from the inner housing. Transmission to the outside (object) can be suppressed. Further, in this electric compressor, since the outer housing has a heat insulating property and hardly transfers heat, the heat of the refrigerant compressed to a high temperature and high pressure by the compression mechanism is not easily radiated from the inner housing to the outside. . For this reason, this electric compressor does not easily reduce the amount of heat of the refrigerant, and, for example, even when it is used as a heat pump, it can exhibit sufficient heating capacity in a heat exchanger for heating.
The mounting portion includes a first mounting portion and a second mounting portion, and the outer housing can include the inner housing when the fastening means is inserted into the first mounting portion, the second mounting portion, and the object, and Fixed to the object. In this case, the assembling work for enclosing the inner housing in the outer housing and the assembling work for fixing the outer housing to the object can be performed simultaneously, so that the assembling work can be simplified.
The outer housing includes a first housing member having a first mounting portion and a second housing member having a second mounting portion. With such a specific configuration, the electric compressor can simplify the outer housing.
Between the inner housing and the outer housing, an intermediate material having vibration-proof properties and / or heat insulation properties is provided. In this case, the electric compressor can further suppress transmission of vibration and noise from the compression mechanism and the motor mechanism from the inner housing to the outside as long as the intermediate material has vibration proofing properties. Further, in this electric compressor, since the intermediate material is difficult to transfer heat if the intermediate material has heat insulation properties, the heat of the refrigerant compressed by the compression mechanism to high temperature and high pressure is It is difficult to dissipate heat further from the outside. As a result, this electric compressor can reliably exhibit the effects of the present invention.

Therefore, the electric compressor of the present invention is difficult to transmit vibration and noise to the outside, and can exhibit a sufficient heating capacity when used as a heat pump.
The electric compressor of the present invention is an electric compressor including a compression mechanism that compresses a refrigerant, and a motor mechanism that operates the compression mechanism.
An inner housing that accommodates the compression mechanism and the motor mechanism in a sealed state; and an outer housing that accommodates the inner housing and has an attachment portion that is fixed to an object by a fastening means;
The inner housing is formed with a suction port through which the refrigerant is sucked into the compression mechanism and a discharge port through which the refrigerant is discharged from the compression mechanism, and an external pipe connected to the suction port and the discharge port is fixed. And
The outer housing is made of a material having a vibration-proof property and a heat insulating property, and can be included in the inner housing by being combined, and is in a non-contact state with the external pipe,
The mounting portion includes a first mounting portion and a second mounting portion,
The outer housing can contain the inner housing and is fixed to the object by inserting the fastening means into the first attachment part, the second attachment part and the object.
The outer housing includes a first housing member having the first mounting portion and a second housing member having the second mounting portion,
The first housing member is provided with the first mounting portion protruding on one side extending in the longitudinal direction,
The second housing member is also characterized in that the second attachment portion is projected on one side extending in the longitudinal direction.

It is not preferred the outer housing is a cylindrical. In this case, since the electric compressor can simplify the outer housing, the manufacturing cost can be reduced. Further, since the inner housing can be easily accommodated in the outer housing, the assembling work can be simplified.

It is not preferred the outer housing is a container shape. In this case, the outer housing encloses the entire inner housing, and can reliably exhibit vibration isolation and heat insulation. As a result, this electric compressor can more reliably exhibit the effects of the present invention.

Outer housing, have preferably to be made of resin or fiber reinforced resin. In this case, the outer housing can easily exhibit the vibration proofing property and the heat insulating property, and thus the effects of the present invention can be more reliably exhibited.

Outer housing, have preferred to have a metal reinforcing portion to the mounting portion. In this case, it is possible to reliably prevent the attachment portion from being damaged by the force acting on the outer housing attached to the object.

It is a schematic diagram of the air conditioner to which the electric compressor of Example 1 is applied. 1 is a schematic cross-sectional view of an electric compressor according to a first embodiment. 1 is a perspective view of an outer housing according to an electric compressor of Example 1. FIG. FIG. 10 is a perspective view of an outer housing according to the electric compressor of the second embodiment. FIG. 10 is a perspective view of an outer housing according to the electric compressor of the third embodiment. 6 is a schematic cross-sectional view of an electric compressor of Example 4. FIG.

  Embodiments 1 to 4 embodying the present invention will be described below with reference to the drawings.

Example 1
As shown in FIG. 1, the electric compressor 1 according to the first embodiment is applied to an air conditioner that is mounted on a vehicle and adjusts the temperature in the passenger compartment. The air conditioner includes the electric compressor 1, a direction switching valve 91, an outside air heat exchanger 92, an expansion valve 93, and a passenger compartment heat exchanger 94.

  As shown in FIG. 2, the electric compressor 1 includes a compression mechanism 3, a motor mechanism 5, an inner housing 10 that houses the compression mechanism 3 and the motor mechanism 5 in a sealed state, and an outer housing 20 that houses the inner housing 10. And. Specific configurations of the inner housing 10 and the outer housing 20 will be described in detail later.

  The compression mechanism 3 includes a fixed scroll 3A that is fixed to the inner peripheral surface 11B of the first inner housing 11 that constitutes the inner housing 10, and a movable scroll 3B that is disposed to face the fixed scroll 3A. The fixed scroll 3A and the movable scroll 3B mesh with each other to form a compression chamber 3C. A drive shaft 5 </ b> A is accommodated in the first inner housing 11. The drive shaft 5A has a front end portion (right side in FIG. 2) rotatably supported by the front end side bearing device 5B and a rear end portion (left side in FIG. 2) rotatably supported by the rear end side bearing device 5C. Has been.

  The motor mechanism 5 is disposed closer to the inner bottom surface 11 </ b> D of the first inner housing 11 than the compression mechanism 3. A stator 5 </ b> D is fixed to the inner peripheral surface 11 </ b> B of the first inner housing 11. A three-phase current is supplied to the stator 5D from a drive circuit (not shown). A rotor 5E fixed to the drive shaft 5A is provided inside the stator 5D. The rotor 5E is rotationally driven by a current supplied to the stator 5D in the stator 5D. A motor mechanism 5 is configured by the drive shaft 5A, the stator 5D, and the rotor 5E.

  As shown in FIGS. 1 and 2, when the motor mechanism 5 rotates to operate the compression mechanism 3, the compression mechanism 3 sucks refrigerant from outside the inner housing 10 and the outer housing 20 through the suction pipe 95. ,Compress. The compression mechanism 3 discharges the compressed refrigerant to the outside of the inner housing 10 and the outer housing 20 through the discharge pipe 96.

  As shown in FIG. 1, the direction switching valve 91 is connected to the electric compressor 1 via a suction pipe 95 and a discharge pipe 96. In addition, the direction switching valve 91 is connected to an outside air heat exchanger 92 via a pipe 97. Furthermore, the direction switching valve 91 is connected to the passenger compartment heat exchanger 94 via a pipe 99. The expansion valve 93 is connected to the outside air heat exchanger 92 via a pipe 98A. The expansion valve 93 is connected to the vehicle interior heat exchanger 94 via a pipe 98B.

  When the direction switching valve 91 causes the discharge pipe 96 and the pipe 97 to communicate with each other and the suction pipe 95 and the pipe 99 communicate with each other under the control of a control unit (not shown) mounted on the vehicle, the discharge pipe 96 is discharged from the electric compressor 1. The refrigerant discharged through the air flows along the direction D1 shown in FIG. On the other hand, when the direction switching valve 91 causes the discharge pipe 96 and the pipe 99 to communicate with each other and the suction pipe 95 and the pipe 97 to communicate with each other, the refrigerant discharged from the electric compressor 1 via the discharge pipe 96 is as shown in FIG. It flows along the direction D2 shown in FIG.

  Since the outside air heat exchanger 92, the passenger compartment heat exchanger 94, and the expansion valve 93 are well-known structures, illustration and description are simplified. The outside air heat exchanger 92 performs heat dissipation or heat absorption with respect to outside air. The vehicle interior heat exchanger 94 performs heat dissipation or heat absorption with respect to the air in the vehicle interior.

  Next, the inner housing 10 and the outer housing 20 of the electric compressor 1 will be described in detail.

  As shown in FIG. 2, the inner housing 10 has a sealed space 10 </ b> A that houses the compression mechanism 3 and the motor mechanism 5 in a sealed state. The inner housing 10 may be composed of one member, or may be composed of a plurality of members that are combined with each other to define the sealed space 10A. In this embodiment, the inner housing 10 includes a first inner housing 11 that opens on the rear end side (left side in FIG. 2), and a second inner housing 12 that closes the rear end side of the first inner housing 11. The compression mechanism 3 and the motor mechanism 5 have a substantially cylindrical shape that is long in the direction in which the compression mechanism 3 and the motor mechanism 5 are arranged. The inner housing 10 is preferably made of a metal material such as an iron material or an aluminum material in order to ensure durability against vibration and heat generated from the compression mechanism 3 and the motor mechanism 5, a high-temperature and high-pressure refrigerant, and the like. .

  The compression mechanism 3 and the motor mechanism 5 are fixed in the sealed space 10A with a well-known fixing structure such as shrink fitting, press fitting, and bolt fastening. Such a fixing structure is difficult to attenuate vibrations and noises of the compression mechanism 3 and the motor mechanism 5 while fixing the compression mechanism 3 and the motor mechanism 5 with high rigidity. As a result, vibration and noise of the compression mechanism 3 and the motor mechanism 5 are easily transmitted to the inner housing 10. Further, heat transmitted from the compression mechanism 3 and the motor mechanism 5 is also easily transmitted to the inner housing 10.

  A suction port 15 is provided through the inner bottom surface 11 </ b> D of the first inner housing 11. A suction member 50 as an external pipe is fixed to the suction port 15. In the sealed space 10 </ b> A, a refrigerant supply path (not shown) is provided between the suction port 15 and the compression mechanism 3.

  A discharge chamber 3 </ b> D is defined between the first inner housing 11 and the second inner housing 12. A discharge port 16 is provided through the inner bottom surface 12 </ b> D of the second inner housing 12. A discharge member 60 as an external pipe is fixed to the discharge port 16.

  The suction member 50 and the discharge member 60 are well-known pipe joints. A suction pipe 95 is connected to the suction member 50. A discharge pipe 96 is connected to the discharge member 60.

  The outer housing 20 has a long cylindrical shape in the direction in which the compression mechanism 3 and the motor mechanism 5 are arranged, and accommodates the inner housing 10 therein. As shown in FIG. 3, the outer housing 20 includes a first housing member 201 and a second housing member 202. The first and second housing members 201 and 202 each have a semi-cylindrical shape, and constitute a cylindrical outer housing 20 by being combined with each other. As shown in FIG. 2, the inner wall surfaces 20 </ b> B of the first and second housing members 201, 202 are shaped so as to be in close contact with the outer wall surface 10 </ b> C of the inner housing 10.

  The first and second housing members 201 and 202 are made of a vibration-proof and heat-insulating material such as a resin or a fiber reinforced resin. In the present embodiment, the first and second housing members 201 and 202 are made of resin.

  As shown in FIG. 3, in the first housing member 201, two first attachment portions 201 </ b> A and 201 </ b> B are projected on one side extending in the longitudinal direction and one on the other side extending in the longitudinal direction. The coupling part 201C is provided in a projecting manner. Further, in the second housing member 202, two second mounting portions 202A and 202B are projected on one side extending in the longitudinal direction, and one coupling portion 202C is projected on the other side extending in the longitudinal direction. It is installed.

  The first mounting portions 201A and 201B, the second mounting portions 202A and 202B, and the coupling portions 201C and 202C are insert-molded with a metal reinforcing portion 29B, and a through hole 29A is provided through the reinforcing portion 29B. When the first and second housing members 201 and 202 are combined, the first attachment portion 201A and the second attachment portion 202A come into contact with each other, and the respective through holes 29A communicate coaxially. In addition, the first mounting portion 201B and the second mounting portion 202B come into contact with each other, and the respective through holes 29A communicate coaxially. Further, the coupling portion 201C and the coupling portion 202C come into contact with each other, and the respective through holes 29A communicate coaxially.

  As shown in FIG. 2, a rib-like engagement portion 8 is projected from an object 9 such as a vehicle frame or an engine to which the electric compressor 1 is attached. As shown in FIG. 3, the engagement portion 8 is formed with two screw holes 8A and 8B.

  In a state where the first and second housing members 201 and 202 are combined so that the inner housing 10 is sandwiched, the bolt 89A is inserted into the through hole 29A of the first and second mounting portions 201A and 202A, and the tip is engaged. 8 is screwed into the screw hole 8A. Further, the bolt 89B is inserted into the through hole 29A of the first and second mounting portions 201B and 202B, and the tip thereof is screwed into the screw hole 8B of the engaging portion 8. Further, the bolt 89C is inserted into the through hole 29A of the coupling portions 201C and 202C, and the tip thereof is screwed into a nut (not shown). Thereby, the first and second housing members 201 and 202 are firmly coupled, and the electric compressor 1 is fixed to the object 9. At this time, as shown in FIG. 2, the outer housing 20 can contain the inner housing 10. Further, the outer housing 20 can support the inner housing 10 by the inner wall surfaces 20B of the first and second housing members 201 and 202 being in close contact with the outer wall surface 10C of the inner housing 10. Bolts 89A, 89B, and 89C are examples of the fastening means of the present invention.

  In a state in which the outer housing 20 accommodates the inner housing 10, the suction member 50 and the discharge member 60 protrude from the both ends of the outer housing 20 in the longitudinal direction to the outside. The suction member 50 and the discharge member 60 are not in contact with the outer housing 20.

  The air conditioner to which the electric compressor 1 according to the first embodiment having such a configuration is applied performs temperature adjustment in the passenger compartment as follows.

  As shown in FIG. 1, when cooling the passenger compartment, the direction switching valve 91 causes the discharge pipe 96 and the pipe 97 to communicate with each other and the suction pipe 95 and the pipe 99 to communicate with each other. If it does so, the refrigerant | coolant which was compressed by the compression mechanism 3 and became high temperature / high pressure will flow along the direction D1, and will thermally radiate and liquefy with respect to external air in the heat exchanger 92 for external air. The pressure of the refrigerant is reduced at the expansion valve 93. Thereafter, the refrigerant absorbs heat from the air in the passenger compartment in the passenger compartment heat exchanger 94 and evaporates. As a result, the air in the passenger compartment is cooled. Then, the refrigerant is returned to the electric compressor 1 through the pipe 99, the direction switching valve 91, and the suction pipe 95.

  On the other hand, when heating the passenger compartment, the direction switching valve 91 causes the discharge pipe 96 and the pipe 99 to communicate with each other and the suction pipe 95 and the pipe 97 to communicate with each other. If it does so, the refrigerant | coolant which was compressed by the compression mechanism 3 and became high temperature / high pressure will flow along the direction D2, and will thermally radiate with respect to the air in a vehicle interior in the vehicle interior heat exchanger 94, and will liquefy. As a result, the air in the passenger compartment is heated. Thereafter, the pressure of the refrigerant is reduced at the expansion valve 93. The refrigerant absorbs heat from the outside air in the outside air heat exchanger 92 and evaporates. Thereafter, the refrigerant is returned to the electric compressor 1 through the pipe 97, the direction switching valve 91, and the suction pipe 95.

  Here, in the electric compressor 1 according to the first embodiment, the compression mechanism 3 and the motor mechanism 5 are fixed to the inner housing 10 with high rigidity. For this reason, if vibration and noise transmission between the inner housing 10 and the object 9 cannot be suppressed, vibration and noise from the compression mechanism 3 and the motor mechanism 5 may cause the inner housing 10 and the outer housing 20 to move. Thus, the signal is transmitted to the object 9 without being attenuated so much that the comfort of the vehicle interior environment is likely to be hindered. In addition, if heat transfer cannot be suppressed between the inner housing 10 and the object 9, the heat of the refrigerant that has been compressed by the compression mechanism 3 to become high temperature and pressure is lost to the object 9. .

  In this regard, in the electric compressor 1 according to the first embodiment, the compression mechanism 3 and the motor mechanism 5 are housed in the inner housing 10 in a sealed state. Then, by combining the outer housing 20 made of a resin having anti-vibration properties and heat insulation properties, the outer housing 20 can contain the inner housing 10 and the outer housing 20 can support the inner housing 10. For this reason, this electric compressor 1 can attenuate the vibration transmitted from the inner housing 10 to the outer housing 20 by supporting the inner housing 10 with the outer housing 20 having vibration proofing properties. In the electric compressor 1, the suction member 50 and the discharge member 60 are fixed to the inner housing 10 in a non-contact state with the outer housing 20. For this reason, in the electric compressor 1, vibration and noise from the compression mechanism 3 and the motor mechanism 5 are not transmitted between the outer housing 20 and the suction member 50 and the discharge member 60. As a result, the electric compressor 1 can suppress vibration and noise from the compression mechanism 3 and the motor mechanism 5 from being transmitted from the inner housing 10 to the object 9.

  Further, in this electric compressor 1, the outer housing 20 has a heat insulating property and is difficult to transfer heat. Therefore, the heat of the refrigerant compressed by the compression mechanism 3 to high temperature and pressure is transferred from the inner housing 10 to the outside. It is difficult to dissipate heat to the housing 20 and the object 9. For this reason, in this electric compressor 1, the amount of heat of the sucked refrigerant and the discharged refrigerant is difficult to decrease. For this reason, as shown in FIG. 1, this electric compressor 1 causes the refrigerant to flow in the vehicle interior heat exchanger 94 even when it is used as a heat pump for heating the vehicle interior by flowing the refrigerant along the direction D2. The temperature can be increased. As a result, the passenger compartment heat exchanger 94 can dissipate heat more effectively with respect to the air in the passenger compartment, and can exhibit a sufficient heating capacity.

  Therefore, the electric compressor 1 according to the first embodiment is difficult to transmit vibration and noise to the outside, and can exhibit a sufficient heating capacity when used as a heat pump.

  Further, in the outer housing 20, the bolt 89A is inserted into the first mounting portion 201A, the second mounting portion 202A and the screw hole 8A (object 9), and the bolt 89B is inserted into the first mounting portion 201B, the second mounting portion 202B and the screw. When the bolt 89C is inserted into the hole 8B (the object 9) and the bolts 89C are inserted into the coupling portions 201C and 202C, the inner housing 10 can be contained and is fixed to the object 9. For this reason, the electric compressor 1 can simultaneously perform the assembling work for enclosing the inner housing 10 in the outer housing 20 and the assembling work for fixing the outer housing 20 to the object 9, thereby simplifying the assembling work. Can be realized.

Further, the outer housing 20 includes a first housing member 201 having first mounting portions 201A and 201B and a second housing member 202 having second mounting portions 202A and 202B . With such a specific configuration, the electric compressor 1 can simplify the outer housing 20.

  Further, the electric compressor 1 can realize a reduction in manufacturing cost because the outer housing 20 has a simple cylindrical shape. Moreover, since the inner housing 10 can be easily accommodated in the outer housing 20, the assembling work can be simplified.

  Furthermore, the electric compressor 1 has the first and second housing members 201 and 202 made of resin, so that the outer housing 20 can easily exhibit vibration proofing and heat insulating properties. It can play more reliably.

  Further, the attachment portion 29 is reinforced by a metal reinforcement portion 29B. For this reason, the electric compressor 1 can reliably prevent the attachment portion 29 from being damaged by the force acting on the outer housing 20 attached to the object 9.

(Example 2)
As shown in FIG. 4, the electric compressor according to the second embodiment employs an outer housing 21 instead of the outer housing 20 according to the first embodiment. Other configurations are the same as those of the electric compressor 1 of the first embodiment. For this reason, about the same structure as the electric compressor 1 of Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted or simplified.

  The outer housing 21 includes a first housing member 211 and a second housing member 212. The first and second housing members 211 and 212 are obtained by adding substantially semicircular wall portions 213 to both ends in the longitudinal direction of the first and second housing members 201 and 202 in the first embodiment. A cutout 214 is formed in the wall 213 so as not to contact the suction member 50 and the discharge member 60. By combining the first and second housing members 211 and 212 with each other, the outer housing 21 having a container shape is configured.

  In the electric compressor according to the second embodiment having the above-described configuration, the outer housing 21 having a container shape encloses the entire inner housing 10 and can reliably exhibit vibration proofing properties and heat insulating properties. As a result, this electric compressor can more reliably exhibit the effects of the present invention.

(Example 3)
As shown in FIG. 5, the electric compressor according to the third embodiment employs an outer housing 22 instead of the outer housing 20 according to the first embodiment. Other configurations are the same as those of the electric compressor 1 of the first embodiment. For this reason, about the same structure as the electric compressor 1 of Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted or simplified.

  The outer housing 22 is formed by integrally molding housing portions 221 and 222 and a hinge portion 223 that couples both.

  The housing part 221 has a shape obtained by removing the coupling part 201C from the first housing member 201 in the first embodiment. The housing portion 222 has a shape obtained by removing the coupling portion 202C from the second housing member 202 in the first embodiment. The hinge part 223 connects the side extending in the longitudinal direction on the opposite side of the mounting parts 201A and 201B in the housing part 221 and the side extending in the longitudinal direction on the opposite side of the mounting parts 202A and 202B in the housing part 222. The hinge portion 223 is deformed and the housing portion 221 and the housing portion 222 come into contact with each other, whereby the cylindrical outer housing 22 is configured.

  The electric compressor according to the third embodiment having the above-described configuration can achieve the same functions and effects as those of the electric compressor 1 according to the first embodiment. Moreover, this electric compressor can implement | achieve reduction of a number of parts and simplification of an assembly | attachment operation | work by omitting the coupling parts 201C and 202C and the volt | bolt 89C.

Example 4
As shown in FIG. 6, the electric compressor 2 according to the fourth embodiment employs an outer housing 23 instead of the outer housing 20 according to the first embodiment, and an intermediate member 31 between the inner housing 10 and the outer housing 23. 32 is provided. Other configurations are the same as those of the electric compressor 1 of the first embodiment. For this reason, about the same structure as the electric compressor 1 of Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted or simplified.

  The outer housing 23 includes a close contact portion 231 and a separation portion 232. The close contact portion 231 is in close contact with the outer wall surface 10 </ b> C of the inner housing 10 at both ends in the longitudinal direction of the outer housing 23. The spacing portion 232 is spaced apart from the outer wall surface 10 </ b> C of the inner housing 10 between the close contact portion 231 on one end side in the longitudinal direction and the close contact portion 231 on the other end side to form a gap.

  The intermediate members 31 and 32 are provided in a gap between the separation portion 232 and the outer wall surface 10 </ b> C of the inner housing 10.

  The intermediate material 31 and the intermediate material 32 are made of different materials. That is, the intermediate material 31 is made of a vibration-proof material, for example, rubber, elastomer, resin, fiber reinforced resin, silicon gel, or the like. In this embodiment, the intermediate member 31 is a rubber annular body, a so-called O-ring. The intermediate material 31 is disposed on one end side and the other end side in the longitudinal direction of the separation portion 232. The intermediate member 31 is mounted in a state of being compressed and deformed in a gap between the separation portion 232 and the outer wall surface 10 </ b> C of the inner housing 10.

  On the other hand, the intermediate material 32 is made of a heat insulating material, for example, a fiber aggregate such as glass wool, a foam material, cellulose fiber, a vacuum heat insulating material, or the like. In this embodiment, the intermediate member 32 is a thick sheet-like body made of glass wool. The intermediate member 32 is wound around the outer wall surface 10 </ b> C of the inner housing 10 and is filled in a gap between the separation portion 232 and the outer wall surface 10 </ b> C of the inner housing 10.

  In the electric compressor 2 according to the fourth embodiment having the above-described configuration, the vibration and noise from the compression mechanism 3 and the motor mechanism 5 are transmitted from the inner housing 10 to the object 9 when the intermediate member 31 has vibration proofing properties. Can be further suppressed. Further, in the electric compressor 1, since the intermediate member 32 has a heat insulating property, the intermediate member 32 is difficult to transfer heat. It is difficult to further dissipate heat from the inner housing 10 to the object 9. As a result, this electric compressor 2 can reliably exhibit the effects of the present invention.

  In the above, the present invention has been described with reference to the first to fourth embodiments. However, the present invention is not limited to the first to fourth embodiments, and can be appropriately modified and applied without departing from the spirit of the present invention. Needless to say.

  For example, in the fourth embodiment, the outer housing 23 has the close contact portion 231 and the separating portion 232, but the close contact portion 231 is deleted, and the outer housing 23 includes the inner housing 10 via the intermediate members 31 and 32. May be.

  Further, in the fourth embodiment, instead of the intermediate members 31 and 32, an intermediate member made of a single member having vibration proofing properties and heat insulating properties may be used. Moreover, as an intermediate material, you may have only one of vibration proofing or heat insulation.

  The compression mechanism 3 is not limited to the scroll type, and a reciprocating type, a vane type, or other known compression methods can be employed.

  The present invention can be used for air conditioning of vehicles and the like.

DESCRIPTION OF SYMBOLS 1, 2 ... Electric compressor 3 ... Compression mechanism 5 ... Motor mechanism 10 ... Inner housing 201A, 201B, 202A, 202B ... Attachment part (201A, 201B ... 1st attachment part, 202A, 202B ... 2nd attachment part)
20, 21, 22, 23 ... outer housing 89A, 89B, 89C ... fastening means (bolts)
9 ... object 31, 32 ... intermediate material 15 ... suction port 16 ... discharge port 50, 60 ... external piping (50 ... suction member, 60 ... discharge member)
201, 211 ... first housing member 202, 212 ... second housing member 29B ... reinforcing portion

Claims (6)

In an electric compressor comprising a compression mechanism for compressing a refrigerant and a motor mechanism for operating the compression mechanism,
An inner housing that accommodates the compression mechanism and the motor mechanism in a sealed state; and an outer housing that accommodates the inner housing and has an attachment portion that is fixed to an object by a fastening means;
The inner housing is formed with a suction port through which the refrigerant is sucked into the compression mechanism and a discharge port through which the refrigerant is discharged from the compression mechanism, and an external pipe connected to the suction port and the discharge port is fixed. And
Said outer housing is made of a material having a vibration-proof property and heat insulating property, Ri encapsulated possible and the external pipe and the non-contact state der the inner housing by being combined,
The mounting portion includes a first mounting portion and a second mounting portion,
The outer housing can contain the inner housing and is fixed to the object by inserting the fastening means into the first attachment part, the second attachment part and the object.
The outer housing includes a first housing member having the first mounting portion and a second housing member having the second mounting portion,
Between the inner housing and the outer housing, an intermediate material having vibration-proof properties and / or heat insulation properties is provided,
The first housing member is provided with the first mounting portion protruding on one side extending in the longitudinal direction,
It said second housing member includes an electric compressor the second mounting portion on one side extending in the longitudinal direction, characterized that you have been protrusively. In an electric compressor comprising a compression mechanism for compressing a refrigerant and a motor mechanism for operating the compression mechanism,
An inner housing that accommodates the compression mechanism and the motor mechanism in a sealed state; and an outer housing that accommodates the inner housing and has an attachment portion that is fixed to an object by a fastening means;
The inner housing is formed with a suction port through which the refrigerant is sucked into the compression mechanism and a discharge port through which the refrigerant is discharged from the compression mechanism, and an external pipe connected to the suction port and the discharge port is fixed. And
The outer housing is made of a material having a vibration-proof property and a heat insulating property, and can be included in the inner housing by being combined, and is in a non-contact state with the external pipe,
The mounting portion includes a first mounting portion and a second mounting portion,
The outer housing can contain the inner housing and is fixed to the object by inserting the fastening means into the first attachment part, the second attachment part and the object .
The outer housing includes a first housing member having the first mounting portion and a second housing member having the second mounting portion,
The first housing member is provided with the first mounting portion protruding on one side extending in the longitudinal direction,
The electric compressor according to claim 2, wherein the second housing member has the second mounting portion protruding on one side extending in the longitudinal direction. It said outer housing electric compressor according to claim 1 or 2 wherein the tubular. Said outer housing electric compressor according to claim 1 or 2, wherein the shape of the container. Said outer housing, an electric compressor according to any one of claims 1 to 4 is made of resin or fiber reinforced resin. The electric compressor according to claim 5 , wherein the outer housing has a metal reinforcing portion in the attachment portion.

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