Electric compressor

Abstract

An electric compressor is provided with a housing in which a motor chamber and an inverter chamber are partitioned, the housing having a partition wall that partitions the motor chamber and the inverter chamber. The airtight terminal has a conductive member that passes through the through-hole of the partition wall, a first end of the conductive member is electrically connected to the inverter, a second end of the conductive member is electrically connected to the connection terminal, and a support plate that supports the conductive member and is fixed to the partition wall in a state where the through-hole is closed. The cluster block has a conductive member insertion hole into which the second end of the conductive member is inserted. The support plate is fixed to the partition wall in a state of being disposed in the motor chamber. The periphery of the conductive member insertion hole in the cluster block includes a sealing surface in surface contact with the support plate.

Description

Technical Field

[0001] The present disclosure relates to an electric compressor. Background Art

[0002] An electric compressor includes a compression section, a motor, an inverter, and a housing. The compression section compresses a fluid. The motor drives the compression section. The inverter drives the motor. A motor chamber and an inverter chamber are defined in the housing. The motor chamber houses the motor. A fluid is sucked into the motor chamber. The inverter chamber houses the inverter. The housing has a partition wall that separates the motor chamber from the inverter chamber. A through hole is formed in the partition wall.

[0003] In addition, the electric compressor includes an airtight terminal and a cluster block. The airtight terminal electrically connects the motor and the inverter in a state where the space between the motor chamber and the inverter chamber is sealed. The cluster block is disposed in the motor chamber. The cluster block is insulating. The cluster block houses connection terminals therein. The connection terminals electrically connect the airtight terminal and motor wiring led out from the motor.

[0004] For example, as disclosed in Japanese Unexamined Patent Application Publication No. 2016-211490, the airtight terminal has a conductive member and a support plate. The conductive member has a first end and a second end, and passes through the through hole of the partition wall. And, in the conductive member, the first end is electrically connected to the inverter, and the second end is electrically connected to the connection terminal. The support plate supports the conductive member. The support plate is fixed to the partition wall in a state where the through hole of the partition wall is blocked. In the above publication, the support plate is fixed to the partition wall in a state of being disposed in the inverter chamber. Summary of the Invention

[0005] Problems to be Solved by the Invention

[0006] In such an electric compressor, the pressure of the fluid sucked into the motor chamber acts on the support plate via the through hole. Therefore, in order to enable the support plate to withstand the pressure of the fluid, for example, it is conceivable to increase the rigidity of the support plate by increasing the thickness of the support plate. At this time, if the support plate is fixed to the partition wall in a state of being disposed in the inverter chamber as in the above-mentioned document, it is possible that the support plate may interfere with the inverter corresponding to "increasing the thickness of the support plate". Therefore, in order to prevent interference between the inverter and the support plate, it is necessary to newly secure a space for disposing the inverter in the inverter chamber. As a result, the size of the electric compressor increases.

[0007] Means for Solving the Problems

[0008] An electric compressor according to one technical solution of the present disclosure includes: a compression unit configured to compress a fluid; a motor configured to drive the compression unit; an inverter configured to drive the motor; a housing that defines a motor chamber for housing the motor and sucking the fluid, and an inverter chamber for housing the inverter, the housing having a partition wall that separates the motor chamber from the inverter chamber; an airtight terminal that electrically connects the motor and the inverter in a state where the motor chamber and the inverter chamber are sealed; a connection terminal that electrically connects the airtight terminal and a motor wiring led out from the motor; and an insulating cluster block that is disposed in the motor chamber and houses the connection terminal therein. The partition wall has a through-hole. The airtight terminal has: a conductive member that passes through the through-hole, and a first end of the conductive member is electrically connected to the inverter, and a second end of the conductive member is electrically connected to the connection terminal; and a support plate that supports the conductive member and is fixed to the partition wall in a state where the through-hole is blocked. The cluster block has a conductive member insertion hole into which the second end of the conductive member is inserted. The support plate is fixed to the partition wall in a state of being disposed in the motor chamber. The periphery of the conductive member insertion hole in the cluster block includes a sealing surface that is in surface contact with the support plate. Description of the Drawings

[0009] Figure 1 is a cross-sectional view of the electric compressor in the embodiment.

[0010] Figure 2 is to Figure 1 A partially enlarged cross-sectional view of the electric compressor is shown.

[0011] Figure 3 is Figure 1 An exploded perspective view of the airtight terminal and the cluster block included in the electric compressor is shown. Detailed Description of the Embodiment

[0012] Hereinafter, an embodiment for embodying the electric compressor will be described according to Figures 1 to 3 An embodiment of the electric compressor will be described. The electric compressor of the present embodiment is used, for example, in a vehicle air conditioner.

[0013] <Outline of the Electric Compressor>

[0014] As Figure 1As shown, the electric compressor 10 includes a housing 11. The housing 11 has a discharge housing member 12 and a motor housing member 13. The discharge housing member 12 and the motor housing member 13 are cylindrical. The motor housing member 13 is connected to the discharge housing member 12. The discharge housing member 12 and the motor housing member 13 are made of a metal material. The discharge housing member 12 and the motor housing member 13 are, for example, made of aluminum. The motor housing member 13 has a plate-shaped end wall 13a and a cylindrical peripheral wall 13b. The peripheral wall 13b extends from the outer peripheral portion of the end wall 13a.

[0015] The electric compressor 10 includes a rotating shaft 14. The rotating shaft 14 is housed inside the motor housing member 13. Therefore, the rotating shaft 14 is housed inside the housing 11. The rotating shaft 14 is rotatably supported by the motor housing member 13.

[0016] The electric compressor 10 includes a compression section 15 and a motor 16. The compression section 15 and the motor 16 are housed inside the motor housing member 13. Therefore, the housing 11 houses the compression section 15 and the motor 16. The compression section 15 and the motor 16 are arranged side by side in the axial direction of the rotating shaft 14, that is, in the direction in which the rotation axis of the rotating shaft 14 extends. The motor 16 is arranged closer to the end wall 13a of the motor housing member 13 than the compression section 15. Inside the motor housing member 13, the space located closer to the end wall 13a of the motor housing member 13 than the compression section 15 is a motor chamber S1 for housing the motor 16. Therefore, the housing 11 defines the motor chamber S1.

[0017] The compression section 15 is driven by the rotation of the rotating shaft 14. The compression section 15 compresses the refrigerant as a fluid. The compression section 15 is, for example, a scroll type having an unillustrated fixed scroll member fixed to the motor housing member 13 inside the motor housing member 13 and an unillustrated rotating scroll member arranged opposite to the fixed scroll member.

[0018] The motor 16 has a cylindrical stator 17 and a cylindrical rotor 18. The rotor 18 is arranged inside the stator 17. The rotor 18 is configured to be able to rotate integrally with the rotating shaft 14. The rotor 18 has a rotor core 18a and a plurality of permanent magnets 18b. The rotor core 18a is fixed to the rotating shaft 14. The plurality of permanent magnets 18b are provided on the rotor core 18a. The stator 17 surrounds the rotor 18. The stator 17 has a cylindrical stator core 17a and a motor coil 19. The motor coil 19 is wound around the stator core 17a. And, by supplying electric power to the motor coil 19, the rotor 18 rotates integrally with the rotating shaft 14. The compression section 15 is driven along with the rotation of the rotating shaft 14. In this way, the motor 16 drives the compression section 15.

[0019] The housing 11 has a suction port 13h. The suction port 13h is formed in a portion of the peripheral wall 13b of the motor housing member 13 near the end wall 13a. The suction port 13h sucks refrigerant into the motor chamber S1. Thus, refrigerant is sucked into the motor chamber S1. The first end of the external refrigerant circuit 20 is connected to the suction port 13h. The housing 11 has a discharge port 12h. The discharge port 12h is formed in the discharge housing member 12. The second end of the external refrigerant circuit 20 is connected to the discharge port 12h.

[0020] The refrigerant sucked into the motor chamber S1 from the first end of the external refrigerant circuit 20 through the suction port 13h is compressed in the compression section 15 by the drive of the compression section 15. The refrigerant compressed in the compression section 15 flows out to the second end of the external refrigerant circuit 20 through the discharge port 12h. And, the refrigerant that has flowed out to the external refrigerant circuit 20 flows back into the motor chamber S1 through the suction port 13h via the heat exchanger and expansion valve of the external refrigerant circuit 20. The electric compressor 10 and the external refrigerant circuit 20 constitute the vehicle air conditioning device 21.

[0021] The electric compressor 10 includes a converter cover 22. The converter cover 22 is a part of the housing 11. Thus, the housing member 11 has the converter cover 22. The converter cover 22 is a cylindrical shape with one end closed. The open end of the converter cover 22 is connected to the end wall 13a of the motor housing member 13. And, the converter chamber 23 is defined by the end wall 13a of the motor housing member 13 and the converter cover 22. Thus, the housing 11 defines the converter chamber 23. The end wall 13a of the motor housing member 13 is a partition wall that separates the motor chamber S1 from the converter chamber 23.

[0022] The electric compressor 10 includes a converter 24. The converter 24 is housed in the converter chamber 23. Thus, the converter chamber 23 houses the converter 24. The converter 24 drives the motor 16. The compression section 15, the motor 16, and the converter 24 are arranged in this order in the axial direction of the rotating shaft 14.

[0023] <Motor wiring>

[0024] The electric compressor 10 includes a motor wiring 25. The motor wiring 25 is led out from the motor coil 19 of the motor 16. Specifically, three motor wirings 25 are led out from a portion of the motor coil 19 located near the end wall 13a of the motor housing member 13, corresponding to the U-phase, V-phase, and W-phase motor coils 19. Each motor wiring 25 is a wiring led out from the motor coil 19 in a state where the electric wires constituting a part of the motor coil 19 are covered with an insulating coating.

[0025] <Through hole>

[0026] AsFigure 2 As shown, a through hole 26 is formed in the end wall 13a of the motor housing member 13. The through hole 26 penetrates the end wall 13a of the motor housing member 13 in the thickness direction of the end wall 13a. The through hole 26 is formed in a portion of the end wall 13a of the motor housing member 13 that is located on the radially outer side of the central portion of the end wall 13a of the motor housing member 13 with respect to the rotary shaft 14. The first end of the through hole 26 opens on the first surface of the end wall 13a of the motor housing member 13. The second end of the through hole 26 opens on the second surface of the end wall 13a of the motor housing member 13. The first surface of the end wall 13a faces the inside of the motor chamber S1, and the second surface of the end wall 13a faces the inside of the converter chamber 23. Sometimes, as will be described later, the first surface of the end wall 13a is referred to as the partition wall facing surface 35.

[0027] <Hermetic terminal>

[0028] As Figure 2 and Figure 3 shown, the electric compressor 10 includes a hermetic terminal 30. The hermetic terminal 30 electrically connects the motor 16 and the converter 24 in a state where the motor chamber S1 and the converter chamber 23 are sealed.

[0029] The hermetic terminal 30 has a conductive member 31, a support plate 32, and a gasket 33. The hermetic terminal 30 has three conductive members 31 corresponding to the motor coils 19 of the U-phase, V-phase, and W-phase. Each conductive member 31 is a cylindrical metal pin extending linearly. Each conductive member 31 has a first end and a second end. Each conductive member 31 passes through the through hole 26. Each conductive member 31 extends parallel to each other. The first end of each conductive member 31 projects into the converter chamber 23 through the through hole 26. And, the first end of each conductive member 31 is electrically connected to the converter 24. The second end of each conductive member 31 projects into the motor chamber S1 through the through hole 26.

[0030] The support plate 32 is in a flat plate shape. The support plate 32 is made of metal. Each conductive member 31 penetrates the support plate 32 in the thickness direction of the support plate 32. An insulating glass member 34 is interposed between each conductive member 31 and the support plate 32. Each glass member 34 insulates the corresponding conductive member 31 from the support plate 32. And, the support plate 32 supports each conductive member 31 in a state where the corresponding conductive member 31 is insulated from the support plate 32 through each glass member 34.

[0031] The support plate 32 is fixed to the end wall 13a of the motor housing member 13 in a state of being disposed within the motor chamber S1. The support plate 32 is fixed to the end wall 13a of the motor housing member 13 in a state of closing the through-hole 26. The end wall 13a of the motor housing member 13 has a partition wall facing surface 35 facing the support plate 32. The partition wall facing surface 35 is in a flat surface shape. The through-hole 26 opens on the partition wall facing surface 35. The support plate 32 has a plate facing surface 36 facing the partition wall facing surface 35. The plate facing surface 36 is in a flat surface shape. The support plate 32 is disposed on the end wall 13a of the motor housing member 13 with the plate facing surface 36 along the partition wall facing surface 35.

[0032] The gasket 33 is in a flat plate shape. The gasket 33 is made of rubber configured to be elastically deformable. The gasket 33 is interposed between the partition wall facing surface 35 and the plate facing surface 36. The gasket 33 is in close contact with the partition wall facing surface 35 and the plate facing surface 36. The gasket 33 seals between the partition wall facing surface 35 and the plate facing surface 36.

[0033] The gasket 33 has a hole 33a. The hole 33a penetrates the gasket 33 in the thickness direction of the gasket 33. The hole 33a has the same shape as the through-hole 26. The hole 33a communicates with the through-hole 26. The gasket 33 has two holes 33b. Each hole 33b penetrates the gasket 33 in the thickness direction of the gasket 33. The two holes 33b are formed in the portion of the gasket 33 located on both sides sandwiching the hole 33a. Each hole 33b is in a circular hole shape.

[0034] The end wall 13a of the motor housing member 13 has two wall holes 37. The two wall holes 37 are formed in the portion of the end wall 13a of the motor housing member 13 located on both sides sandwiching the through-hole 26. Each wall hole 37 is in a circular hole shape. Each wall hole 37 opens on the partition wall facing surface 35. Each wall hole 37 communicates with the corresponding hole 33b of the gasket 33. The aperture diameter of the wall hole 37 is the same as the aperture diameter of the hole 33b.

[0035] As Figure 2 shown, the end wall 13a of the motor housing member 13 has two bolt insertion holes 38. Each bolt insertion hole 38 communicates with the end of the corresponding wall hole 37 on the side opposite to the partition wall facing surface 35. Each bolt insertion hole 38 opens on the second surface of the end wall 13a of the motor housing member 13. Each bolt insertion hole 38 is in a circular hole shape. The aperture diameter of the bolt insertion hole 38 is smaller than the aperture diameter of the wall hole 37.

[0036] The support plate 32 has two plate holes 39. Each plate hole 39 penetrates the support plate 32 in the thickness direction of the support plate 32. The two plate holes 39 are formed in portions of the support plate 32 located on both sides sandwiching the three conductive members 31. Each plate hole 39 is in the shape of a circular hole. Each plate hole 39 communicates with a corresponding hole 33b of the gasket 33. Each plate hole 39 communicates with a corresponding wall hole 37 via the corresponding hole 33b. The diameter of the plate hole 39 is the same as the diameter of the hole 33b and the diameter of the wall hole 37.

[0037] The hermetic terminal 30 has two nuts 40. The nut 40 has a nut cylindrical portion 41 and a nut flange portion 42. The nut cylindrical portion 41 is cylindrical. The inside of the nut cylindrical portion 41 is an internal threaded hole. The outer diameter of the nut cylindrical portion 41 is slightly smaller than the diameter of the wall hole 37, the diameter of the hole 33b, and the diameter of the plate hole 39. The nut cylindrical portion 41 is configured to be able to be inserted through the plate hole 39, the hole 33b, and the wall hole 37 in sequence. Therefore, the nut cylindrical portion 41 is inserted through the wall hole 37. In addition, the nut cylindrical portion 41 is inserted through the plate hole 39.

[0038] The nut flange portion 42 projects annularly from the nut cylindrical portion 41 toward the radially outer side of the nut cylindrical portion 41. The nut flange portion 42 projects from a portion of the outer peripheral surface of the nut cylindrical portion 41 located at the axial end of the nut cylindrical portion 41. Each nut 40 is arranged relative to the support plate 32 in a state where the nut cylindrical portion 41 is inserted through the corresponding plate hole 39 and the wall hole 37 and the nut flange portion 42 is fixed around the corresponding plate hole 39.

[0039] The hermetic terminal 30 has two bolts 43. Each bolt 43 is configured to be able to be screwed (threadedly engaged, threadedly connected) with the nut cylindrical portion 41 of the nut 40. A washer 43a is integrated with each bolt 43. Each bolt 43 is screwed with the nut cylindrical portion 41 from inside the converter chamber 23 through the corresponding bolt insertion hole 38. Each bolt 43 fixes the support plate 32 to the end wall 13a of the motor housing member 13 via the nut flange portion 42 by the tightening force of each bolt 43 generated by screwing with the nut cylindrical portion 41 from inside the converter chamber 23.

[0040] <Cluster block>

[0041] The electric compressor 10 includes a cluster block 50. The cluster block 50 is arranged in the motor chamber S1. The cluster block 50 is insulating. The cluster block 50 is made of resin. The cluster block 50 houses three connection terminals 51 inside. Each connection terminal 51 electrically connects the hermetic terminal 30 and the motor wiring 25. Thus, the cluster block 50 is arranged in the motor chamber S1 and houses the connection terminals 51 that electrically connect the hermetic terminal 30 and the motor wiring 25 inside.

[0042] The cluster block 50 has a block main body portion 52 and a block plate portion 53. The block main body portion 52 is in a substantially square box shape. The block plate portion 53 is in a flat plate shape. The block main body portion 52 protrudes from the first surface of the block plate portion 53.

[0043] Inside the block main body portion 52, three terminal accommodation chambers 54 are partitioned. Corresponding connection terminals 51 are accommodated in each terminal accommodation chamber 54. As Figure 3 shown, three motor wiring insertion holes 55 are formed in the block main body portion 52. Each motor wiring insertion hole 55 communicates with the corresponding terminal accommodation chamber 54. Each motor wiring insertion hole 55 is configured to allow the corresponding motor wiring 25 to be inserted therethrough. And each motor wiring 25 is electrically connected to the connection terminal 51 in the terminal accommodation chamber 54 via the corresponding motor wiring insertion hole 55.

[0044] As Figure 2 shown, three conductive member insertion holes 56 are formed in the block plate portion 53. Accordingly, the cluster block 50 has the conductive member insertion holes 56. Each conductive member insertion hole 56 opens on the second surface of the block plate portion 53 at a position on the side opposite to the block main body portion 52. Each conductive member insertion hole 56 communicates with the corresponding terminal accommodation chamber 54. Each conductive member insertion hole 56 is configured to allow the second end of the conductive member 31 to be inserted therethrough. And the second end of each conductive member 31 is electrically connected to the connection terminal 51 in the terminal accommodation chamber 54 via the corresponding conductive member insertion hole 56. In this way, the second end of the conductive member 31 is inserted into the conductive member insertion hole 56. The conductive member 31 passes through the through hole 26, and the first end of the conductive member 31 is electrically connected to the converter 24, and the second end of the conductive member 31 is electrically connected to the connection terminal 51. Electric power from the converter 24 is supplied to the motor 16 via the conductive member 31, the connection terminal 51, and the motor wiring 25. Thereby, the motor 16 is driven.

[0045] <Sealing surface>

[0046] The second surface of the block plate portion 53 is in a flat surface shape. And the second surface of the block plate portion 53 is configured to be capable of making surface contact with the support plate 32. The periphery of each conductive member insertion hole 56 in the second surface of the block plate portion 53 becomes a sealing surface 57 that makes surface contact with the support plate 32. In this way, the periphery of the conductive member insertion hole 56 in the surface of the cluster block 50 facing the support plate 32 includes the sealing surface 57 that makes surface contact with the support plate 32.

[0047] <Accommodation portion>

[0048] Two housing portions 58 are formed in the block plate portion 53. Accordingly, housing portions 58 are formed in the cluster block 50. Each housing portion 58 is formed on the second surface of the block plate portion 53. The two housing portions 58 are disposed at positions on both sides of the portion sandwiching the three conductive member insertion holes 56. Each housing portion 58 is a concave portion having a circular hole shape in a plan view. The aperture diameter of each housing portion 58 is slightly larger than the outer diameter of the nut flange portion 42 of the nut 40. Each housing portion 58 houses the nut flange portion 42 of the corresponding nut 40.

[0049] <Annular sealing portion>

[0050] The block plate portion 53 has an outer peripheral wall 59. The outer peripheral wall 59 projects in a cylindrical shape from the outer peripheral portion of the second surface of the block plate portion 53. The cluster block 50 is disposed relative to the support plate 32 with the outer peripheral wall 59 surrounding the outer peripheral surface of the support plate 32. The inner peripheral surface of the outer peripheral wall 59 is in close contact with the outer peripheral surface of the support plate 32. In this way, an annular sealing portion 60 that seals the space between the support plate 32 is formed by the inner peripheral surface of the outer peripheral wall 59 surrounding the outer peripheral surface of the support plate 32. In this way, the cluster block 50 has the annular sealing portion 60.

[0051] [Function of the embodiment]

[0052] Next, the function of the present embodiment will be described.

[0053] The periphery of the conductive member insertion hole 56 in the cluster block 50 includes a sealing surface 57 that makes surface contact with the support plate 32. Thereby, the intrusion of foreign matter into the inside of the cluster block 50 via between the conductive member insertion hole 56 and the conductive member 31 is suppressed. Further, the intrusion of foreign matter into the inside of the cluster block 50 via between the conductive member insertion hole 56 and the conductive member 31 is further suppressed by the annular sealing portion 60.

[0054] [Effect of the embodiment]

[0055] The following effects can be obtained in the above-described embodiment.

[0056] (1) The support plate 32 is fixed to the end wall 13a in a state of being disposed in the motor chamber S1 that bears the pressure of the refrigerant. Therefore, a part of the support plate 32 is supported by the end wall 13a, and thus the support plate 32 is hardly affected by the pressure of the refrigerant. Therefore, it is not necessary to increase the rigidity of the support plate 32 by increasing the thickness of the support plate 32 in order to enable the support plate 32 to withstand the pressure of the refrigerant. As a result, it is not necessary to newly secure a layout space for the converter 24 in the converter chamber 23 in order to prevent the converter 24 from interfering with the support plate 32. Therefore, problems such as an increase in the size of the electric compressor 10 can be avoided.

[0057] In addition, the periphery of the conductive member insertion through-hole 56 in the cluster block 50 includes a sealing surface 57 that makes surface contact with the support plate 32. Thereby, it is possible to suppress the intrusion of foreign matter into the interior of the cluster block 50 via between the conductive member insertion through-hole 56 and the conductive member 31. In this way, the periphery of the conductive member insertion through-hole 56 in the cluster block 50 is configured as a sealing surface 57 that makes surface contact with the support plate 32 fixed to the end wall 13a of the motor housing member 13 in a state of being disposed in the motor chamber S1. By doing so, the sealing performance of the existing configuration of the cluster block 50 disposed in the motor chamber S1 is improved. Therefore, unlike a comparative example in which a sealing member is provided between the conductive member insertion through-hole 56 and the conductive member 31, there is no need for a configuration in which the length of the sealing member is extremely increased, that is, the length of the conductive member insertion through-hole 56 is extremely increased, in order to make the sealing performance of the sealing member good. Through the above, it is possible to achieve miniaturization of the physical size of the electric compressor 10.

[0058] (2) The hermetic terminal 30 has a flat gasket 33 interposed between the partition wall opposing surface 35 and the plate opposing surface 36. Thereby, the support plate 32 is pressed toward the partition wall opposing surface 35 due to the pressure of the refrigerant. As a result, the gasket 33 is appropriately compressed and deformed between the partition wall opposing surface 35 and the plate opposing surface 36. Thereby, the sealing performance between the partition wall opposing surface 35 and the plate opposing surface 36 at the gasket 33 can be improved. Therefore, the motor 16 and the converter 24 can be electrically connected in a state where the motor chamber S1 and the converter chamber 23 are further sealed by the hermetic terminal 30, and thus the reliability of the electric compressor 10 can be improved.

[0059] (3) "Fixing the support plate 32 to the end wall 13a of the motor housing member 13 using the bolt 43" is performed in a state where the nut cylinder portion 41 is inserted through the plate hole 39 and the wall hole 37. Therefore, when the support plate 32 is fixed to the end wall 13a of the motor housing member 13 using the bolt 43, the relative position of the support plate 32 and the end wall 13a of the motor housing member 13 is not easily shifted by the nut cylinder portion 41. Thereby, it is possible to easily ensure the positional accuracy of the support plate 32 and the end wall 13a of the motor housing member 13. As a result, it is possible to easily position the position of the conductive member 31 relative to the end wall 13a of the motor housing member 13 at a desired position.

[0060] (4) A housing portion 58 for housing the nut flange portion 42 is formed in the cluster block 50. "The configuration in which the housing portion 58 for housing the nut flange portion 42 is formed in the cluster block 50 in this way" is preferable as a configuration for avoiding interference between the cluster block 50 and the nut flange portion 42.

[0061] (5) The cluster block 50 has an annular seal portion 60 that seals with the support plate 32 by surrounding the outer peripheral surface of the support plate 32. Thereby, it is possible to further suppress the intrusion of foreign matter into the interior of the cluster block 50 via between the conductive member insertion hole 56 and the conductive member 31 by the annular seal portion 60.

[0062] The annular seal portion 60 surrounds the outer peripheral surface of the support plate 32. Therefore, the cluster block 50 is disposed in a state where it is close to the end wall 13a of the motor housing member 13 by an amount corresponding to "the annular seal portion 60 surrounds the outer peripheral surface of the support plate 32". Thereby, the cluster block 50 can be disposed in the motor chamber S1 in a state of being extremely close to the end wall 13a of the motor housing member 13, and thus, the miniaturization of the physical size of the electric compressor 10 can be further achieved. In this way, while further achieving the miniaturization of the physical size of the electric compressor 10, the improvement of the sealing performance of the cluster block 50 can be achieved.

[0063] [Modification Example]

[0064] In addition, the above-described embodiment can be modified and implemented as follows. The above-described embodiment and the following modification examples can be implemented in combination with each other within a range where there is no technical contradiction.

[0065] ○ In the embodiment, the cluster block 50 may also be configured not to have the annular seal portion 60.

[0066] ○ In the embodiment, the housing portion 58 for housing the nut flange portion 42 may be formed, for example, on the support plate 32. In this case, the housing portion 58 is a circular hole-shaped recess that communicates with the plate hole 39 and is one size larger than the plate hole 39.

[0067] ○ In the embodiment, the housing portion 58 may not be a recess, and for example, may be a hole that penetrates the block plate portion 53 in the thickness direction of the block plate portion 53. In short, the housing portion 58 is configured to be able to house the nut flange portion 42.

[0068] ○ In the embodiment, the cluster block 50 may also be integrally formed with a resin component that is part of the motor 16. As the resin component, for example, a resin cover that ensures insulation between the motor coil 19 and the housing 11 can be cited.

[0069] ○ In the embodiment, for example, it may be configured as follows: an internal threaded hole is formed in the end wall 13a of the motor housing member 13, and the support plate 32 is fixed to the end wall 13a of the motor housing member 13 by screwing a bolt into the internal threaded hole via the plate hole 39 from inside the motor chamber S1.

[0070] ○In an embodiment, for example, the closed end of the converter cover 22 may also be connected to the end wall 13a of the motor housing member 13, and the open end of the converter cover 22 may be closed by a cover member that is a member other than the motor housing member 13. The converter chamber 23 may also be defined by the converter cover 22 and the cover member. In this case, the end wall 13a of the motor housing member 13 and the bottom wall of the converter cover 22 function as a partition wall that separates the motor chamber S1 from the converter chamber 23.

[0071] ○In an embodiment, the electric compressor 10 may, for example, also be configured such that the converter 24 is disposed on the outer side in the radial direction of the rotary shaft 14 with respect to the housing 11. In short, the compression section 15, the motor 16, and the converter 24 may not be arranged in this order in the axial direction of the rotary shaft 14.

[0072] ○In an embodiment, the compression section 15 is not limited to the scroll type, and may be, for example, a piston type, a vane type, a rotary type, or the like.

[0073] ○In an embodiment, the electric compressor 10 constitutes the vehicle air-conditioning device 21, but is not limited thereto. For example, the electric compressor 10 may also be configured to be mounted on a fuel cell vehicle and compress air, which is a fluid supplied to the fuel cell, by the compression section 15.

Claims

1. An electric compressor, comprising: a compression section configured to compress a fluid; a motor configured to drive the compression section; a converter configured to drive the motor; a housing that defines a motor chamber for housing the motor and sucking the fluid, and a converter chamber for housing the converter, the housing having a partition wall that separates the motor chamber from the converter chamber; an airtight terminal that electrically connects the motor and the converter in a state where the motor chamber and the converter chamber are sealed; a connection terminal that electrically connects the airtight terminal and a motor wiring led out from the motor; and an insulating cluster block that is disposed in the motor chamber and houses the connection terminal therein, the partition wall having a through hole, the airtight terminal having: a conductive member that passes through the through hole, and a first end of the conductive member is electrically connected to the converter, and a second end of the conductive member is electrically connected to the connection terminal; and a support plate that supports the conductive member and is fixed to the partition wall in a state where the through hole is blocked, the cluster block having a conductive member insertion through hole for inserting the second end of the conductive member, the support plate being fixed to the partition wall in a state where it is disposed in the motor chamber, a sealing surface that is in surface contact with the support plate being included around the conductive member insertion through hole in the cluster block.

2. The electric compressor according to claim 1, the partition wall having a partition wall facing surface that faces the support plate, the support plate having a plate facing surface that faces the partition wall facing surface, the airtight terminal further having a flat gasket interposed between the partition wall facing surface and the plate facing surface.

3. The electric compressor according to claim 1 or 2, the airtight terminal having: a nut having a nut cylinder portion and a nut flange portion that protrudes annularly outward in the radial direction of the nut cylinder portion; and a bolt that is screwed into the nut cylinder portion, the partition wall further having a wall hole for inserting the nut cylinder portion, the support plate further having a plate hole for inserting the nut cylinder portion and communicating with the wall hole, the nut being disposed relative to the support plate in a state where the nut cylinder portion is inserted through the plate hole and the wall hole and the nut flange portion is clamped around the plate hole, the bolt fixing the support plate to the partition wall via the nut flange portion by the tightening force of the bolt generated by screwing with the nut cylinder portion from the converter chamber.

4. The electric compressor according to claim 3, the cluster block further having a housing portion for housing the nut flange portion.

5. The electric compressor according to claim 1, the cluster block further having an annular sealing portion configured to seal between itself and the support plate by surrounding the outer peripheral surface of the support plate.

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