ELECTRIC COMPRESSOR

Abstract

An electric compressor includes a rotary shaft, a compression part, a motor, an inverter, an inverter housing, a motor housing arranged next to the inverter housing in a radial direction of the rotary shaft, a compression part housing, a shaft support member, a conductive pin that is electrically connected to the motor, an inverter terminal, and an electrical connecting member. The electrical connecting member has a busbar, a first terminal, a second terminal, and a case. The busbar is bent such that the first terminal is engaged with the conductive pin and the second terminal is engaged with the inverter terminal by moving the electrical connecting member in an axial direction of the rotary shaft.

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to Japanese Patent Application No. 2023-155504 filed on Sep. 21, 2023, the entire disclosure of which is incorporated herein by reference.

BACKGROUND ART

The present disclosure relates to an electric compressor.

An example of a conventional electric compressor is disclosed in Japanese Patent Application Publication No. 2000-255252. This electric compressor includes a compression part, a motor, an inverter, and a housing.

The compression part is driven by rotation of a rotary shaft to compress fluid. The motor rotates the rotary shaft. The inverter has an inverter circuit that drives the motor. The housing includes a motor housing and an inverter housing. The motor housing accommodates the motor. The inverter housing accommodates an inverter device.

In this electric compressor, the motor housing and the inverter housing are arranged side by side in a radial direction of the rotary shaft. This suppresses that an axial length of the electric compressor is increased.

Furthermore, in this electric compressor, conductive pins electrically connected to the motor are disposed on the motor housing, and inverter terminals electrically connected to the inverter circuit are disposed in the inverter housing. The conductive pins and the inverter terminals are connected through electrical conductors such as lead wires or busbars, and these electrical conductors are disposed outside the housing on one side in an axial direction of the rotary shaft.

However, in the above-described conventional electric compressor, the electrical conductors are disposed outside the housing, and thus, the electrical conductors are easily damaged and there are concerns about protection of the electrical conductors.

Furthermore, the electrical conductors are connected to the conductive pins and the inverter terminals by welding or screw fastening, which reduces ease of assembly of the electric compressor.

The present disclosure has been made in view of the above-described conventional circumstances, and is directed to providing an electric compressor in which electrical conductors through which the conductive pins and the inverter terminals are connected are protected while ease of assembly of the electric compressor is improved.

SUMMARY

In accordance with an aspect of the present disclosure, there is provided

• • an electric compressor that includes a rotary shaft, a compression part that is driven by rotation of the rotary shaft to compress fluid, a motor that rotates the rotary shaft, an inverter that has an inverter circuit configured to drive the motor, an inverter housing in which the inverter is accommodated, a motor housing that has a bottomed cylindrical shape and is arranged next to the inverter housing in a radial direction of the rotary shaft and in which the motor is accommodated, a compression part housing that has a bottomed cylindrical shape and in which the compression part is accommodated, a shaft support member that has an insertion hole through which the rotary shaft is inserted, the shaft support member being disposed between the motor housing and the compression part housing, the shaft support member rotatably supporting the rotary shaft, the shaft support member defining with the motor housing a motor chamber in which the motor is accommodated and defining with the compression part housing a compression part chamber, a conductive pin that is inserted into a first through hole formed in a bottom wall of the motor housing, the conductive pin being held by the first through hole and electrically connected to the motor, an inverter terminal that is disposed inside the inverter housing and electrically connected to the inverter circuit, and an electrical connecting member through which the conductive pin is electrically connected to the inverter terminal. The electrical connecting member has a busbar, a first terminal, a second terminal, and a case. The busbar has a plate shape. The first terminal is disposed at one end portion of the busbar and the conductive pin is connected to the first terminal outside the motor housing. The second terminal is disposed at the other end portion of the busbar and the inverter terminal is connected to the second terminal inside the inverter housing. The case has a second through hole through which the conductive pin passes to be oriented toward the first terminal, the case being fixed to the bottom wall of the motor housing and accommodating the first terminal and the busbar. The busbar is bent such that the first terminal is engaged with the conductive pin and the second terminal is engaged with the inverter terminal by moving the electrical connecting member in an axial direction of the rotary shaft.

Other aspects and advantages of the disclosure will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure, together with objects and advantages thereof, may best be understood by reference to the following description of the embodiments together with the accompanying drawings in which:

FIG. 1 is a left side schematic view of a compressor module including an electric compressor of an embodiment;

FIG. 2 is a top schematic view of the compressor module including the electric compressor of the embodiment;

FIG. 3 is a back schematic view of the compressor module including the electric compressor of the embodiment;

FIG. 4 is a partial top schematic view of an inverter housing of the electric compressor of the embodiment;

FIG. 5 is a partial front schematic view of the electric compressor of the embodiment focusing on a positional relationship among electronic components;

FIG. 6 is a partial perspective schematic view of a housing and a hermetically sealed terminal according to the electric compressor of the embodiment;

FIG. 7 is a partial perspective schematic view of a part of a case of an electrical connecting member, busbars, a part of the hermetically sealed terminal, and the inverter housing according to the electric compressor of the embodiment;

FIG. 8 is a perspective schematic view of the electrical connecting member according to the electric compressor of the embodiment, as viewed from diagonally behind the electrical connecting member;

FIG. 9 is a perspective schematic view of the electrical connecting member according to the electric compressor of the embodiment, as viewed from diagonally in front of the electrical connecting member;

FIG. 10 is a perspective schematic view of a part of the case and the busbars according to the electric compressor of the embodiment, as viewed diagonally from behind the part of the case and the busbars;

FIG. 11 is a perspective schematic view of a state in which receptacle terminals disposed at one end portions of the busbars are connected to connection end portions of the conductive pins, and plugs disposed on the other end portions of the busbars are connected to jacks, according to the electric compressor of the embodiment;

FIG. 12 is a perspective schematic view of the one end portions of the busbars that swing according to the electric compressor of the embodiment; and

FIG. 13 is a schematic view of a receptacle terminal that has an opening of an opening diameter larger than a diameter of a conductive pin according to an electric compressor of a modified example.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The following will describe an embodiment of the present disclosure with reference to the drawings. An electric compressor (hereinafter simply referred to as the compressor) 20 of the embodiment is specifically a scroll type electric compressor. This compressor 20 is mounted on a vehicle (not illustrated) and is used in an air conditioner for a vehicle. This air conditioner for the vehicle is a heat pump cycle device that performs air-conditioning inside a vehicle interior and controls temperature of equipment on the vehicle.

In the present embodiment, a front-rear direction and an up-down direction of the compressor 20 are defined by solid arrows illustrated in FIG. 1. In addition, in FIG. 1, a front side of a sheet is defined as a left side of the compressor 20 and a back side of the sheet is defined as a right side of the compressor 20. In FIG. 2 and subsequent figures, the front-rear direction, the up-down direction, and the left-right direction of the compressor 20 are defined corresponding to FIG. 1. In the following description, a front and rear, an upper and lower, and a left and right are all determined based on the front and rear, the upper and lower, and the left and right in FIG. 1. Note that these directions are examples used for ease of explanation, a posture of the compressor 20 is changed as appropriate corresponding to a vehicle on which the compressor 20 is mounted, or the like.

As illustrated in FIGS. 1 to 3, the compressor 20 of the embodiment is a part of a compressor module 10 assembled in a heat pump cycle device, which is not illustrated. The compressor module 10 is formed of a plurality of devices that is integrated with each other and constitutes the heat pump cycle device. Specifically, the compressor module 10 is formed by integrating, for example, an expansion valve, a regulating valve, an on-off valve, a chiller, a receiver, and a water heat exchanger, and a muffler in addition to the compressor 20, of the devices that constitute the heat pump cycle device. Illustrations of these devices excluding the compressor 20 are omitted.

This heat pump cycle device switches and controls the on-off valve, or the like in accordance with various operation modes to heat or cool an air flowing into the vehicle interior by refrigerant circulating in a refrigerant circuit and to cool a cooling heat medium circulating in a heat medium circuit by the refrigerant circulating in the refrigerant circuit.

This compressor module 10 includes a flow passage box 12 formed of plates each having a substantially rectangular flat shape. The plurality of devices that constitutes the heat pump cycle device is attached to the flow passage box 12. Although not illustrated, the flow passage box 12 includes a heat medium passage, or the like through which the cooling heat medium circulates in the heat medium circuit in addition to a refrigerant passage through which the refrigerant circulates in the refrigerant circuit, in the heat pump cycle device.

The compressor 20 is within an outline of the flow passage box 12 formed of the rectangular flat plates. In a positional relationship between the flow passage box 12 and the compressor 20, a rotation axis O of a rotary shaft 22 in the compressor 20 extends parallel to a main surface of the flow passage box 12, which has the largest area of surfaces of the flow passage box 12 formed of the rectangular flat plates. Here, the rotary shaft 22 will be described later. More specifically, the rotation axis O of the rotary shaft 22 extends parallel to a longitudinal direction of the main surface of the flow passage box 12. Note that the compressor 20 may be disposed such that the rotation axis O of the rotary shaft 22 extends perpendicular to the main surface of the flow passage box 12.

The compressor 20 includes the rotary shaft 22, a compression part 24, a motor 26, an inverter 28, and a housing 30.

The housing 30 includes a compression part housing 32 formed in a bottomed cylindrical shape, a motor housing 34 formed in a bottomed cylindrical shape, and an inverter housing 36. The compression part housing 32 and the motor housing 34 each have a substantially cylindrical shape. The inverter housing 36 is formed of plates each having a substantially rectangular flat shape.

The rotary shaft 22 is disposed in the compression part housing 32 and the motor housing 34. The rotary shaft 22 is formed in a columnar shape that extends in the front-rear direction of the compressor 20. The rotary shaft 22 is rotatably supported around the rotation axis O by the motor housing 34 and a shaft support member 37, which will be described later.

The compression part housing 32 and the motor housing 34 are arranged in an axial direction of the rotary shaft 22. The motor housing 34 is disposed behind the compression part housing 32. In the following description, the axial direction of the rotary shaft 22 is simply referred to as the axial direction, and one side in the axial direction means a rear side of the compressor 20.

The motor housing 34 and the inverter housing 36 are arranged side by side in a radial direction of the rotary shaft 22. That is, the inverter housing 36 is disposed on a side surface of the motor housing 34. In the following description, the radial direction of the rotary shaft 22 is simply referred to as the radial direction.

The compression part housing 32 has a compression part chamber 32A. The motor housing 34 has a motor chamber 34A. The inverter housing 36 defines an inverter chamber 36A. The shaft support member 37 is disposed between the compression part housing 32 and the motor housing 34, and the shaft support member 37 cooperates with the motor housing 34 to define the motor chamber 34A in which the motor 26 is accommodated and cooperates with the compression part housing 32 to define the compression part chamber 32A in which the compression part 24 is accommodated. The shaft support member 37 has an insertion hole 37A through which the rotary shaft 22 is inserted and rotatably supports the rotary shaft 22.

The compression part 24 is accommodated in the compression part chamber 32A. The compression part 24 is driven by rotation of the rotary shaft 22 to compress refrigerant. The refrigerant is an example of the “fluid” in the present disclosure. The compression part 24 is connected to the refrigerant passage of the flow passage box 12 through a high pressure refrigerant hose 14. Although not illustrated, the motor chamber 34A is connected to the refrigerant passage of the flow passage box 12 through a low pressure refrigerant hose. The refrigerant flowing from the refrigerant passage of the flow passage box 12 into the motor chamber 34A through the low pressure refrigerant hose is sucked into the compression part 24 through a suction passage formed in the shaft support member 37.

The compression part 24 includes a fixed scroll and an orbiting scroll, which are not illustrated. In the compression part 24, the orbiting scroll rotates by the rotation of the rotary shaft 22, which changes a volume of a compression chamber formed between the fixed scroll and the orbiting scroll. As a result, the compression part 24 sucks the refrigerant from the refrigerant passage of the flow passage box 12 into the compression chamber through the low pressure refrigerant hose, compresses the refrigerant, and discharges the compressed refrigerant. The refrigerant discharged from the compression part 24 flows into the refrigerant passage of the flow passage box 12 through the high pressure refrigerant hose 14.

The motor 26 is accommodated in the motor chamber 34A. The motor 26 has a stator and a rotor, which are not illustrated. The stator is connected to the inverter 28. The rotary shaft 22 is fixed to the rotor. The rotor is rotated by electric power supplied from the inverter 28 to the stator, which rotates the rotary shaft 22.

The inverter 28 is accommodated in the inverter chamber 36A. As illustrated in FIG. 4, the inverter 28 includes an inverter circuit 28A, a control circuit 28B, and a high voltage input filter 28C. The inverter circuit 28A drives the motor 26. The control circuit 28B controls the inverter circuit 28A. The high voltage input filter 28C reduces noise transmitted from an external power source 57 through a high voltage connector 56, which will be described later. The inverter circuit 28A, the control circuit 28B, and the high voltage input filter 28C are each formed of a circuit board and electronic devices such as switching elements mounted on the circuit board.

The compressor 20 includes a hermetically sealed terminal 38 and three jacks 52. Each of the jacks 52 is an example of the “inverter terminal” in the present disclosure.

As illustrated in FIG. 6, the hermetically sealed terminal 38 is provided on a bottom wall 34B of the motor housing 34. The bottom wall 34B is located at an end of the motor housing 34 on the one side in the axial direction. The bottom wall 34B is formed in a substantially circular plate shape and radially extends on the one side in the axial direction. The bottom wall 34B has a first through hole 34C (see FIG. 1) that extends through the bottom wall 34B in the axial direction and through which the motor chamber 34A communicates with an outside of the motor chamber 34A, and the hermetically sealed terminal 38 is disposed in the first through hole 34C. The hermetically sealed terminal 38 is fixed to the bottom wall 34B by two first fastening members 39. The hermetically sealed terminal 38 ensures a sealing performance of the motor housing 34.

The hermetically sealed terminal 38 is electrically connected to the motor 26. As illustrated also in FIG. 11, the hermetically sealed terminal 38 has three conductive pins 42 each formed in a stick shape. An insulating member is interposed among the conductive pins 42. The conductive pins 42 extend linearly in the axial direction through the first through hole 34C. One end of each of the conductive pins 42 is inserted into a terminal box 44 that is made of resin and disposed in the motor chamber 34A (see FIG. 1). Although not illustrated, in the terminal box 44, three motor wires extending from the stator of the motor 26 are each electrically connected to the one end of the corresponding conductive pin 42 through a connecting terminal. That is, the conductive pins 42 are inserted into the first through hole 34C formed in the bottom wall 34B of the motor housing 34 to be held by the first through hole 34C and electrically connected to the motor 26.

The other end of each of the conductive pins 42 is a connection end portion 46 that extends in the axial direction and protrudes from the bottom wall 34B to the outside of the motor chamber 34A.

As illustrated in FIG. 6, the inverter housing 36 has a communication hole 48. The communication hole 48 extends linearly in the axial direction and opens toward the one side in the axial direction, and the inverter chamber 36A communicates with the outside of the inverter chamber 36A through the communication hole 48. The communication hole 48 is formed in an elongated hole shape whose longitudinal direction is the left-right direction of the compressor 20.

As illustrated in FIGS. 1 and 4, the jacks 52 are disposed inside the inverter chamber 36A of the inverter housing 36. The jacks 52 face the communication hole 48 in the axial direction. As illustrated in FIG. 11, the jacks 52 each have a pair of holding pieces that hold a corresponding plug 68, which will be described later, therebetween by elastic restoring force. Each of the jacks 52 has, at one end thereof in the axial direction, an opening end into which the corresponding plug 68 is engaged. An opening at the opening end of each of the jacks 52 increases in diameter such that the corresponding plug 68, which moves relative to the jack 52, is easily inserted into the opening as the opening extends toward the one side in the axial direction.

The jacks 52 are electrically connected to the inverter circuit 28A through three conductive members 54 (see FIG. 4).

As illustrated in FIG. 6, the inverter housing 36 has an extending portion 36B. The extending portion 36B extends from the bottom wall 34B of the motor housing 34 toward one side in the axial direction.

As illustrated in FIG. 4, a distance D1 between the bottom wall 34B and an axial direction end surface 36C of the extending portion 36B, which is oriented toward the one side in the axial direction, is equal to or greater than a distance D2 between the bottom wall 34B and an axial direction end surface 60C of an electrical connecting member 60, which is oriented toward the one side in the axial direction. The electrical connecting member 60 will be described later. That is, the extending portion 36B protrudes from the bottom wall 34B of the motor housing 34 in the axial direction over the electrical connecting member 60.

The high voltage connector 56 and a communication connector 58 are each connected to the extending portion 36B (see FIG. 4). The high voltage connector 56 supplies the power from the external power source 57 to the motor 26. The communication connector 58 sends control signals from an external controller 59 to a control circuit 28B of the inverter 28, the control signals having a power smaller than the power supplied from the external power source 57.

The electrical connecting member 60 is disposed outside the housing 30 on the one side in the axial direction. The electrical connecting member 60 is fixed to the bottom wall 34B of the motor housing 34 by two second fastening members 61 (see FIG. 8). In attaching this electrical connecting member 60, receptacle terminals 66 are connected to the connection end portions 46 of the conductive pins 42 and the plugs 68 are connected to the jacks 52 by moving the electrical connecting member 60 in the axial direction of the rotary shaft 22. The receptacle terminals 66 and the plugs 68 will be described later.

As illustrated in FIG. 3, the electrical connecting member 60 extends in a direction perpendicular to the axial direction of the rotary shaft 22 and is disposed on an imaginary straight line VL extending through the rotation axis O of the rotary shaft 22. In the direction perpendicular to the axial direction of the rotary shaft 22, the electrical connecting member 60 is interposed between the high voltage connector 56 and the communication connector 58. That is, the high voltage connector 56 is disposed on an opposite side of the communication connector 58 across the electrical connecting member 60.

As illustrated in FIGS. 8 to 10, the electrical connecting member 60 includes a case 62, three busbars 64, the three receptacle terminals 66, and the three plugs 68. Each of the receptacle terminals 66 is an example of the “first terminal” in the present disclosure. Each of the plugs 68 is an example of the “second terminal” in the present disclosure.

The electrical connecting member 60 has a body 60A and a head 60B. In a cross-section perpendicular to the axial direction, the body 60A is formed in a substantially rectangular shape. In the cross-section perpendicular to the axial direction (the front-rear direction), a longitudinal direction of the head 60B is the left-right direction, and the head 60B is formed in a substantially elongated circle shape whose longitudinal direction is the left-right direction of the compressor 20 and that has a pair of straight portions extending parallel to the left-right direction.

The case 62 has a base portion 62A made of resin, a cover portion 62B made of resin, a first seal portion 62C, and a second seal portion 62D.

The base portion 62A and the cover portion 62B each have, in a cross-section in the direction perpendicular to the axial direction, a body-corresponding portion having a shape corresponding to the body 60A of the electrical connecting member 60 and a head-corresponding portion having a shape corresponding to the head 60B of the electrical connecting member 60.

The base portion 62A has two first insertion holes 65A, two second insertion holes 65B, three second through holes 65C, and a third insertion hole 65D. The first insertion holes 65A, the second insertion holes 65B, and the second through holes 65C are formed in the body-corresponding portion. The third insertion hole 65D is formed in the head-corresponding portion.

The body-corresponding portion in the base portion 62A is disposed so as to surround the hermetically sealed terminal 38, which is provided on the bottom wall 34B. That is, the hermetically sealed terminal 38 is accommodated in the case 62, and not exposed to an outside of the case 62.

The first fastening members 39 used for fixing the hermetically sealed terminal 38 to the bottom wall 34B are inserted into the first insertion holes 65A. Second fixing members 61 used for fixing the electrical connecting member 60 to the bottom wall 34B are inserted into the second insertion holes 65B. The connection end portions 46 of the conductive pins 42 pass through the second through holes 65C to be oriented toward the receptacle terminals 66. Portions of the three busbars 64 near the plugs 68 and a portion of the case 62 are inserted into the third insertion hole 65D.

The cover portion 62B is integrated with the base portion 62A with the busbars 64 and the receptacle terminals 66 interposed between the cover portion 62B and the base portion 62A. That is, the busbars 64 and the receptacle terminals 66 are accommodated in the case 62. The cover portion 62B provides insulation among the busbars 64.

The first seal portion 62C is formed of a ring-shaped packing that surrounds the body-corresponding portion in the base portion 62A. As illustrated in FIG. 7, in a state where the electrical connecting member 60 is attached to the bottom wall 34B, an end surface of the first seal portion 62C having the ring shape comes in contact with the bottom wall 34B, which forms a flat surface sealing portion for providing a seal between the bottom wall 34B and the case 62.

The second seal portion 62D is disposed at the head-corresponding portion in the cover portion 62B. The second seal portion 62D is formed of a ring-shaped packing whose outer peripheral surface has a shape corresponding to a shape of an inner peripheral surface of the communication hole 48 of the inverter housing 36. As illustrated in FIG. 7, in the state where the electrical connecting member 60 is attached to the bottom wall 34B, the outer peripheral surface of the second seal portion 62D having the ring shape comes in contact with the inner peripheral surface of the communication hole 48, which forms a cylindrical (tubular) sealing portion for providing a seal between the communication hole 48 and the case 62.

As illustrated in FIG. 10, the busbars 64 each having a plate shape are disposed such that a thickness direction of each of the busbars 64 coincides with the direction perpendicular to the axial direction (a direction indicated by an arrow AR in FIG. 10). The busbars 64 each have a first flat-wise bending portion 64A, a second flat-wise bending portion 64B, a first edge-wise bending portion 64C, a second edge-wise bending portion 64D, and a third edge-wise bending portion 64E. The first flat-wise bending portion 64A, the second flat-wise bending portion 64B, the first edge-wise bending portion 64C, the second edge-wise bending portion 64D, and the third edge-wise bending portion 64E are arranged in this order from one end portion near the receptacle terminal 66 to the other end portion near the plug 68 in each of the busbars 64. That is, the busbars 64 are bent by edge-wise bending so that the plugs 68 are engaged with the jacks 52, and the busbars 64 are bent by the flat-wise bending so that positions of the receptacle terminals 66 are adjusted in a surface direction of the bottom wall 34B of the motor housing 34.

As illustrated in FIG. 12, the busbars 64 are formed so that the one end portion of each of the busbars 64 swings with the first flat-wise bending portion 64A as a fulcrum in the direction perpendicular to the axial direction (the direction indicated by the arrow AR in FIG. 12), that is, in the surface direction of the bottom wall 34B of the motor housing 34. The busbars 64 are accommodated in the case 62. Thus, the busbars 64 may swing in the surface direction of the bottom wall 34B of the motor housing 34. That is, the case 62 has a configuration in which the one end portion of each of the busbars 64 may swing in the surface direction of the bottom wall 34B of the motor housing 34 as the case 62 is moved in the surface direction of the bottom wall 34B of the motor housing 34.

Each of the receptacle terminals 66 is fixed to the one end portion of the corresponding busbar 64. The receptacle terminals 66 are positioned inside the case 62. The receptacle terminals 66 are fixed inside the case 62. That is, as the case 62 is moved in the surface direction of the bottom wall 34B of the motor housing 34, the receptacle terminals 66 are also moved in the surface direction of the bottom wall 34B of the motor housing 34. In each of the receptacle terminals 66, an opening diameter of an opening into which the connection end portion 46 of the corresponding conductive pin 42 is inserted is the same as a diameter of the connection end portion 46 of the conductive pin 42.

Each of the plugs 68 is integrally formed with the other end portion of the corresponding busbar 64. The plugs 68 extend straight in the axial direction.

As illustrated in FIG. 9, the plugs 68 are disposed outside the case 62. The plugs 68 are inserted in the inverter chamber 36A through the communication hole 48. As illustrated in FIG. 11, the plugs 68 are connected to the jacks 52, which are disposed in the inverter chamber 36A.

In this compressor 20, the busbars 64 and the receptacle terminals 66 that are connected to the connection end portions 46 of the conductive pins 42 are accommodated in the case 62. Furthermore, the plugs 68 are connected to the jacks 52 inside the inverter housing 36. That is, although the busbars 64 and the receptacle terminals 66 as conductors through which the conductive pins 42 are electrically connected to the jacks 52 are disposed outside the housing 30, the busbars 64 and the receptacle terminals 66 are inside the case 62, and thus, these conductors are not exposed to the outside of the housing 30. Accordingly, the conductors through which the conductive pins 42 and the jacks 52 are electrically connected are not hardly damaged, and it is possible to protect the conductors.

In addition, in this compressor 20, each of the receptacle terminals 66 is disposed at the one end portion of the corresponding busbar 64, and the plug 68 is disposed at the other end portion of the busbar 64. Such busbars 64 are each bent by the edge-wise bending and the flat-wise bending to be formed in a predetermined shape. With this configuration, the electrical connecting member 60 is moved in the axial direction of the rotary shaft 22, thereby engaging the receptacle terminals 66 with the connection end portions 46 of the conductive pins 42 and engaging the plugs 68 with the jacks 52.

More specifically, in a state where each of the plugs 68 and the corresponding jack 52 are aligned and engaged with each other to be temporarily fixed, while the one end portion of each of the busbars 64 is swung with the first flat-wise bending portion 64A as the fulcrum in the surface direction of the bottom wall 34B perpendicular to the axial direction of the rotary shaft 22, the case 62 is swung in the surface direction of the bottom wall 34B. Thus, the receptacle terminal 66 is adjusted in position relative to the corresponding conductive pin 42. Then, the receptacle terminals 66 are connected to the conductive pins 42 and the plugs 68 are connected to the jacks 52 by a simple operation in which the electrical connecting member 60 is moved in the axial direction of the rotary shaft 22 in this state, so that ease of assembly of the compressor 20 may be improved.

Therefore, according to this compressor 20, it is possible to protect the conductors through which the conductive pins 42 and the jacks 52 as the inverter terminals are connected to each other and improve the ease of assembly of the compressor 20.

Specifically, in this compressor 20, the motor housing 34 and the inverter housing 36 are arranged in the radial direction of the rotary shaft 22. This configuration of the compressor 20 suppresses that an axial length of the compressor 20 is increased as compared with a configuration in which the motor housing 34 and the inverter housing 36 are arranged in the axial direction of the rotary shaft 22. In addition, in this configuration of the compressor 20, as compared with the configuration in which the motor housing 34 and the inverter housing 36 are arranged in the axial direction of the rotary shaft 22, for example, a portion of the inverter housing 36 that is overlapped in the axial direction with the bottom wall 34B of the motor housing 34 is reduced, so that the portion that causes the axial length of the compressor 20 to increase is reduced. Furthermore, in this configuration of the compressor 20, as compared with the configuration in which the motor housing 34 and the inverter housing 36 are arranged in the axial direction of the rotary shaft 22, for example, a portion of the inverter housing 36 that protrudes from the motor housing 34 in the radial direction of the rotary shaft 22 is shortened. This suppresses that the compressor 20 is increased in size in the radial direction and that the portion of the inverter housing 36 that protrudes from the motor housing 34 in the radial direction swings.

The electrical connecting member 60 and the hermetically sealed terminal 38 are disposed on the bottom wall 34B outside the housing 30 on the one side in the axial direction of the rotary shaft 22. Thus, a case connecting portion to which the electrical connecting member 60 is connected and a terminal arrangement portion where the hermetically sealed terminal 38 is provided do not need to be formed on the side surface of the motor housing 34. As a result, in a cross-sectional shape of the motor housing 34 in the direction perpendicular to the axial direction of the rotary shaft 22, that is, in the radial direction of the rotary shaft 22, irregular-shaped portions are reduced, which ensures the sealing performance of the motor housing 34 and suppresses noise and vibration.

In addition, in the direction perpendicular to the axial direction of the rotary shaft 22, the electrical connecting member 60 is interposed between the high voltage connector 56 and the communication connector 58. With this configuration, noise that is transmitted from the high voltage connector 56 to the communication connector 58 is reduced by positioning the communication connector 58 away from the high voltage connector 56.

Furthermore, in this case, as illustrated in FIG. 4, the high voltage input filter 28C, which is arranged next to the high voltage connector 56 in the axial direction, may be positioned at a left or right end of the inverter housing 36. With this configuration, as illustrated in FIG. 5, a lower portion of the high voltage input filter 28C, which is relatively large in the up-down direction, may extend to the outside of the motor housing 34 in the radial direction. This suppresses that the compressor 20 is increased in size in the radial direction.

The electrical connecting member 60 is disposed below the extending portion 36B of the inverter housing 36 to which the high voltage connector 56 and the communication connector 58 are each connected, and the distance D1 between the axial direction end surface 36C of the extending portion 36B and the bottom wall 34B is larger than the distance D2 between the axial direction end surface 60C of the electrical connecting member 60 and the bottom wall 34B. With these configurations, even when the electrical connecting member 60 is provided outside the housing 30 on the one side in the axial direction of the rotary shaft 22, the axial length of the compressor 20 is not increased. As a result, these configurations contribute to reduction in axial length of the compressor 20.

The whole of the hermetically sealed terminal 38 provided on the bottom wall 34B is accommodated in the case 62, and a sealing performance of the case 62 in contact with the bottom wall 34B is ensured by the first seal portion 62C. Accordingly, the motor chamber 34A is sealed with high reliability.

Although the present disclosure has been described based on the above embodiment, the present disclosure is not limited to the above embodiment, and may be modified within the scope of the present disclosure.

For example, in the compressor of the embodiment, each of the busbars 64 has the first flat-wise bending portion 64A, the second flat-wise bending portion 64B, the first edge-wise bending portion 64C, the second edge-wise bending portion 64D, and the third edge-wise bending portion 64E; however, the present disclosure is not limited to this configuration. For example, the first edge-wise bending portion 64C and the second edge-wise bending portion 64D may be omitted.

In the compressor of the embodiment, the opening diameter of the opening of each of the receptacle terminals 66 into which the connection end portion 46 of the corresponding conductive pin 42 is inserted is the same as the diameter of the connection end portion 46 of the conductive pin 42; however, the present disclosure is not limited to this configuration. For example, as illustrated in FIG. 13, an opening diameter R1 of an opening 66A of each of the receptacle terminals 66 may be larger than a diameter R2 of the connection end portion 46 of the corresponding conductive pin 42. This configuration makes it easier to adjust the position of the receptacle terminal 66 relative to the conductive pin 42, and further improves the ease of assembly of the electric compressor.

In the compressor of the embodiment, the base portion 62A and the cover portion 62B in the case 62 are made of resin; however, the present disclosure is not limited to this configuration. For example, the cover portion 62B may be made of metal in order to block electromagnetic noise, or the like.

The following technical ideas may be obtained from the disclosure of the specification, the drawings, or the like.

(Supplementary Note 1)

An electric compressor including:

• • a rotary shaft;
  • a compression part that is driven by rotation of the rotary shaft to compress fluid;
  • a motor that rotates the rotary shaft;
  • an inverter that has an inverter circuit configured to drive the motor;
  • an inverter housing in which the inverter is accommodated;
  • a motor housing that has a bottomed cylindrical shape and is arranged next to the inverter housing in a radial direction of the rotary shaft and in which the motor is accommodated;
  • a compression part housing that has a bottomed cylindrical shape and in which the compression part is accommodated;
  • a shaft support member that has an insertion hole through which the rotary shaft is inserted, the shaft support member being disposed between the motor housing and the compression part housing, the shaft support member rotatably supporting the rotary shaft, the shaft support member defining with the motor housing a motor chamber in which the motor is accommodated and defining with the compression part housing a compression part chamber;
  • a conductive pin that is inserted into a first through hole formed in a bottom wall of the motor housing, the conductive pin being held by the first through hole and electrically connected to the motor;
  • an inverter terminal that is disposed inside the inverter housing and electrically connected to the inverter circuit; and
  • an electrical connecting member through which the conductive pin is electrically connected to the inverter terminal, wherein
  • the electrical connecting member has a busbar, a first terminal, a second terminal, and a case,
  • the busbar has a plate shape,
  • the first terminal is disposed at one end portion of the busbar and the conductive pin is connected to the first terminal outside the motor housing,
  • the second terminal is disposed at the other end portion of the busbar and the inverter terminal is connected to the second terminal inside the inverter housing,
  • the case has a second through hole through which the conductive pin passes to be oriented toward the first terminal, the case being fixed to the bottom wall of the motor housing and accommodating the first terminal and the busbar, and
  • the busbar is bent such that the first terminal is engaged with the conductive pin and the second terminal is engaged with the inverter terminal by moving the electrical connecting member in an axial direction of the rotary shaft.

(Supplementary Note 2)

The electric compressor according to supplementary note 1, wherein

• • the first terminal is a receptacle terminal with which the conductive pin is engaged in the axial direction,
  • the second terminal extends in the axial direction, and
  • the busbar has an edge-wise bending portion at which the busbar is bent by edge-wise bending so that the second terminal is engaged with the inverter terminal and a pair of flat-wise bending portions at which the busbar is bent between the edge-wise bending portion and the receptacle terminal by flat-wise bending so that a position of the receptacle terminal is adjusted in a surface direction of the bottom wall of the motor housing, the surface direction being perpendicular to the axial direction.

(Supplementary Note 3)

The electric compressor according to supplementary note 2, wherein

• • the receptacle terminal has an opening into which the conductive pin is inserted; and
  • an opening diameter of the opening is larger than a diameter of the conductive pin.

(Supplementary Note 4)

The electric compressor according to any one of supplementary notes 1 to 3, wherein

• • a high voltage connector that supplies power from an external power source to the motor and a communication connector that sends control signals from an external controller to the inverter are each connected to the inverter housing, the control signals having a power smaller than the power supplied from the external power source, and
  • the high voltage connector is disposed on an opposite side to the communication connector across the electrical connecting member.

(Supplementary Note 5)

The electric compressor according to any one of supplementary notes 1 to 4, wherein

• • the inverter housing has an extending portion that extends from the bottom wall of the motor housing in the axial direction, and
  • the extending portion protrudes from the bottom wall of the motor housing in the axial direction over the electrical connecting member.

INDUSTRIAL APPLICABILITY

The present disclosure is applicable to an air conditioner of a vehicle, or the like.

Claims

1. An electric compressor comprising: a rotary shaft;a compression part that is driven by rotation of the rotary shaft to compress fluid;a motor that rotates the rotary shaft;an inverter that has an inverter circuit configured to drive the motor;an inverter housing in which the inverter is accommodated;a motor housing that has a bottomed cylindrical shape and is arranged next to the inverter housing in a radial direction of the rotary shaft and in which the motor is accommodated;a compression part housing that has a bottomed cylindrical shape and in which the compression part is accommodated;a shaft support member that has an insertion hole through which the rotary shaft is inserted, the shaft support member being disposed between the motor housing and the compression part housing, the shaft support member rotatably supporting the rotary shaft, the shaft support member defining with the motor housing a motor chamber in which the motor is accommodated and defining with the compression part housing a compression part chamber;a conductive pin that is inserted into a first through hole formed in a bottom wall of the motor housing, the conductive pin being held by the first through hole and electrically connected to the motor;an inverter terminal that is disposed inside the inverter housing and electrically connected to the inverter circuit; andan electrical connecting member through which the conductive pin is electrically connected to the inverter terminal, whereinthe electrical connecting member has a busbar, a first terminal, a second terminal, and a case,the busbar has a plate shape,the first terminal is disposed at one end portion of the busbar and the conductive pin is connected to the first terminal outside the motor housing,the second terminal is disposed at the other end portion of the busbar and the inverter terminal is connected to the second terminal inside the inverter housing,the case has a second through hole through which the conductive pin passes to be oriented toward the first terminal, the case being fixed to the bottom wall of the motor housing and accommodating the first terminal and the busbar, andthe busbar is bent such that the first terminal is engaged with the conductive pin and the second terminal is engaged with the inverter terminal by moving the electrical connecting member in an axial direction of the rotary shaft.

2. The electric compressor according to claim 1, wherein the first terminal is a receptacle terminal with which the conductive pin is engaged in the axial direction,the second terminal extends in the axial direction, andthe busbar has an edge-wise bending portion at which the busbar is bent by edge-wise bending so that the second terminal is engaged with the inverter terminal and a pair of flat-wise bending portions at which the busbar is bent between the edge-wise bending portion and the receptacle terminal by flat-wise bending so that a position of the receptacle terminal is adjusted in a surface direction of the bottom wall of the motor housing, the surface direction being perpendicular to the axial direction.

3. The electric compressor according to claim 2, wherein the receptacle terminal has an opening into which the conductive pin is inserted; andan opening diameter of the opening is larger than a diameter of the conductive pin.

4. The electric compressor according to claim 1, wherein a high voltage connector that supplies power from an external power source to the motor and a communication connector that sends control signals from an external controller to the inverter are each connected to the inverter housing, the control signals having a power smaller than the power supplied from the external power source, andthe high voltage connector is disposed on an opposite side to the communication connector across the electrical connecting member.

5. The electric compressor according to claim 1, wherein the inverter housing has an extending portion that extends from the bottom wall of the motor housing in the axial direction, andthe extending portion protrudes from the bottom wall of the motor housing in the axial direction over the electrical connecting member.