Motor compressor

Abstract

To inhibit increase in size of an inverter housing in a direction orthogonal to an axial direction of a rotary shaft and inhibit damage of a high voltage connector and a low voltage connector in a motor compressor in which the inverter housing is provided on a peripheral wall of the motor housing.SOLUTION: An inverter housing 36 provided on a peripheral wall of a motor housing 34 has an extending portion 36B extending in a direction opposite to the peripheral wall farther than a bottom wall 34B of the motor housing 34 in an axial direction of a rotary shaft 22. The extending portion 36B is provided with a high voltage connector 56 and a low voltage connector 58. The high voltage connector 56 supplies electric power from a high voltage power source 57 to a motor 26. The low voltage connector 58 supplies electric power smaller than that supplied from the high voltage power source 57 from a low voltage power source 59 to an inverter 28. The high voltage connector 56 and the low voltage connector 58 overlap with the bottom wall 34B and are disposed in a range of a width of the extending portion 36B in an axial view of the rotary shaft 22.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to an electric compressor. [Background technology]

[0002] An example of a conventional electric compressor is disclosed in Patent Document 1. This electric compressor includes a compression section, a motor, an inverter, and a housing.

[0003] The compression unit is driven by rotation of the rotary shaft to compress the fluid. The motor rotates the rotary shaft. The inverter has an inverter circuit that drives the motor. The housing has a motor housing and an inverter housing. The motor housing houses the motor. The inverter housing houses the inverter.

[0004] In this electric compressor, the inverter housing is disposed on the outer peripheral surface of the motor housing, and the motor housing and the inverter housing are arranged side by side in the radial direction of the rotating shaft, which prevents the axial length of the electric compressor from becoming large.

[0005] In this electric compressor, a high-voltage connector and a low-voltage connector are connected to the side of the inverter housing. The high-voltage connector supplies power from an external power source to the motor. The low-voltage connector is a communication connector that transmits control signals from an external control device, which consumes less power than the external power source, to the inverter. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-324903 Summary of the Invention [Problem to be solved by the invention]

[0007] Incidentally, for example, when a compressor module is formed by integrating multiple devices that constitute a heat pump cycle with an electric compressor, and this compressor module is applied to an air conditioning system to be mounted on a vehicle or the like, it is necessary to make the electric compressor more compact in order to improve the mountability on the vehicle.

[0008] However, in the above-described conventional electric compressor, the high-voltage connector and the low-voltage connector are protruding from the side surfaces of the outer frame that constitutes the inverter housing. Specifically, when the direction perpendicular to the axial direction of the rotating shaft is defined as the width direction of the inverter housing, these connectors protrude laterally from the side surfaces of the inverter housing that face the width direction. As a result, the inverter housing is enlarged in the width direction perpendicular to the axial direction of the rotating shaft by the amount that these connectors protrude from the side surfaces of the inverter housing.

[0009] Furthermore, if the high-voltage connector and the low-voltage connector protrude from the side surface of the inverter housing, the protruding portions are susceptible to damage from external impacts.

[0010] The present invention has been made in consideration of the above-mentioned conventional situation, and aims to solve the problem of preventing the inverter housing from becoming larger in a direction perpendicular to the axial direction of the rotating shaft and preventing damage to the high-voltage connector and low-voltage connector in an electric compressor in which an inverter housing is provided on the peripheral wall of a cylindrical motor housing. [Means for solving the problem]

[0011] The electric compressor of the present invention comprises: a rotating shaft; a compression unit that is driven by rotation of the rotary shaft and compresses the fluid; a motor that rotates the rotary shaft; an inverter having an inverter circuit that drives the motor; a housing that accommodates the rotating shaft, the compression unit, the motor, and the inverter, The housing includes: a motor housing having a cylindrical shape with a bottom, the motor housing having a cylindrical peripheral wall extending in the axial direction of the rotary shaft and a bottom wall connected to one end of the peripheral wall, the motor being accommodated on an inner peripheral surface side of the peripheral wall; an inverter housing provided on the peripheral wall and accommodating the inverter; a compression unit housing having a cylindrical shape with a bottom, the compression unit housing being disposed on the opposite side of the bottom wall with the motor interposed therebetween and configured to accommodate the compression unit; a shaft support member that is provided between the opening of the motor housing and the opening of the compression unit housing, that defines, together with the motor housing, a motor chamber that houses the motor, and that defines, together with the compression unit housing, a compression unit chamber that houses the compression unit, and that has an insertion hole through which the rotating shaft is inserted and rotatably supports the rotating shaft, the inverter housing has an extension portion that extends in the axial direction away from the peripheral wall beyond the bottom wall, The extension portion has a high voltage connector for supplying power from a high voltage power supply to the motor; a low voltage connector for supplying a power from a low voltage power source to the inverter that is less than the power of the high voltage power source; The high-voltage connector and the low-voltage connector are characterized in that they overlap the bottom wall when viewed in the axial direction of the rotating shaft and are arranged within the width range of the extension portion.

[0012] In the electric compressor of the present invention, the inverter housing has an extension portion that extends axially beyond the bottom wall of the motor housing in a direction opposite to the peripheral wall, and a high-voltage connector and a low-voltage connector are provided on this extension portion. The high-voltage connector and the low-voltage connector are arranged so as to overlap with the bottom wall when viewed in the axial direction of the rotating shaft. This prevents the inverter housing from becoming larger in height, which is a direction perpendicular to the axial direction of the rotating shaft, compared to when these connectors are provided so as to protrude from the extension portion toward the opposite side of the motor housing without overlapping with the bottom wall when viewed in the axial direction. Furthermore, the bottom wall prevents the high-voltage connector and the low-voltage connector from being damaged by external impact.

[0013] Furthermore, the high-voltage connector and the low-voltage connector are disposed within the width of the extension portion when viewed in the axial direction. Therefore, the high-voltage connector and the low-voltage connector do not protrude from the extension portion in the width direction of the inverter housing when viewed in the axial direction. As a result, the inverter housing is prevented from becoming larger in size in the width direction, which is perpendicular to the axial direction of the rotating shaft, due to the high-voltage connector and the low-voltage connector. Furthermore, the high-voltage connector and the low-voltage connector are prevented from being damaged by external impact.

[0014] Therefore, according to the present invention, in an electric compressor in which an inverter housing is provided on the peripheral wall of a cylindrical motor housing, it is possible to prevent the inverter housing from becoming larger in size in a direction perpendicular to the axial direction of the rotating shaft, and to prevent damage to the high-voltage connector and low-voltage connector.

[0015] The motor housing may be provided with a conductive pin electrically connected to the motor and penetrating the bottom wall. The inverter housing may house inverter terminals electrically connected to the inverter circuit and may have extension-portion through-holes that open into the extension portion. An electrical connection member may be provided between the bottom wall and the extension portion, penetrating the extension-portion through-hole and electrically connecting the conductive pin and the inverter terminal. The high-voltage connector is preferably disposed on the opposite side of the low-voltage connector from the axial view, with the electrical connection member sandwiched therebetween.

[0016] In this case, the inverter terminals connected to the inverter circuit of the inverter housed in the inverter chamber are electrically connected to the conductive pins connected to the motor housed in the motor chamber by an electrical connection member. The electrical connection member is disposed between the high-voltage connector and the low-voltage connector when viewed in the axial direction. This facilitates increasing the distance between the high-voltage connector and the low-voltage connector. This is advantageous for reducing noise transmitted from the high-voltage connector to the low-voltage connector. Furthermore, because the electrical connection member does not protrude beyond the width of the extension portion, the electric compressor does not become larger in the width direction of the inverter housing due to the electrical connection member.

[0017] The electrical connection member preferably has a plate-shaped bus bar, a first terminal, and a second terminal. The first terminal is provided at one end of the bus bar, and a conductive pin can be connected to it outside the motor housing. The second terminal is provided at the other end of the bus bar, and an inverter terminal can be connected to it inside the inverter housing. The first terminal is preferably connected to the conductive pin in the axial direction, and the second terminal is preferably connected to the inverter terminal in the axial direction. Furthermore, it is preferable that the high-voltage connector is connected to a high-voltage cable connector provided at one end of a high-voltage cable that supplies power from a high-voltage power source. Furthermore, it is preferable that the low-voltage connector is connected to a low-voltage cable connector provided at one end of a low-voltage cable that supplies power from a low-voltage power source in the axial direction.

[0018] In this case, the connection between the first terminal and the conductive pin, the connection between the second terminal and the inverter terminal, the connection between the high-voltage connector and the high-voltage cable connector, and the connection between the low-voltage connector and the low-voltage cable connector are all made in the axial direction. Therefore, these connections can all be made in the axial direction without changing the orientation of the housing. As a result, these connections are easy to make. It is also easy to secure working space for these connections. As a result, the assembly of the electric compressor can be simplified.

[0019] The motor housing preferably has a peripheral wall provided with a pair of mounting legs for mounting the motor housing to an object, and one of the mounting legs is preferably located on the opposite side of the inverter housing from the axial direction, with the high-voltage connector sandwiched therebetween, and the other mounting leg is preferably located on the opposite side of the inverter housing from the axial direction, with the low-voltage connector sandwiched therebetween.

[0020] If an external impact acts on a motor housing attached to an object and damages the mounting legs, the impact could extend to the inverter housing, potentially damaging the inverter circuit, etc. In this regard, with this electric compressor, one mounting leg is located on the opposite side of the inverter housing across the high-voltage connector, and the other mounting leg is located on the opposite side of the inverter housing across the low-voltage connector, making it easy to increase the distance between the inverter housing and the mounting legs. Therefore, even if the mounting legs are damaged, the inverter housing is less likely to be affected. As a result, damage to the inverter circuit, etc. due to damage to the mounting legs can be reduced. [Effects of the Invention]

[0021] According to the present invention, in an electric compressor in which an inverter housing is provided on the peripheral wall of a cylindrical motor housing, it is possible to reduce the size of the inverter housing in a direction perpendicular to the axial direction of the rotating shaft and to reduce damage to the high-voltage connector and low-voltage connector. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is a schematic diagram of a compressor module including an electric compressor according to a first embodiment, as viewed from the left. [Figure 2] FIG. 2 is a schematic diagram of a compressor module including the electric compressor of the first embodiment as viewed from above. [Figure 3] FIG. 3 is a schematic diagram of a compressor module including the electric compressor of the first embodiment, as viewed from the rear. [Figure 4] FIG. 4 is a partial schematic view of the electric compressor of the first embodiment, mainly showing the inverter housing portion as viewed from above. [Figure 5] FIG. 5 is a schematic diagram of the electric compressor of the first embodiment, showing the inverter housing, the motor housing, the power connector as a high-voltage connector, the communication connector as a low-voltage connector, the electrical connection members, and the mounting legs as viewed from behind. [Figure 6] FIG. 6 is a partial perspective view of the electric compressor according to the first embodiment, which diagrammatically shows a part of the inverter housing, a part of the motor housing, and an airtight terminal. [Figure 7] FIG. 7 is a perspective view of the electric compressor according to the first embodiment, which is a schematic view of a part of the accommodating case, a bus bar, a part of the airtight terminal, and a part of the inverter housing in the electrical connecting member. [Figure 8] FIG. 8 is a perspective view of the electric compressor according to the first embodiment, which is a schematic view of an inverter housing, a power connector, and a communication connector. [Figure 9] FIG. 9 is a perspective view showing the electric connecting member of the electric compressor according to the first embodiment, as viewed obliquely from behind. [Figure 10] FIG. 10 is a perspective view schematically showing an electrical connection member of the electric compressor of the first embodiment, as viewed obliquely from the front. [Figure 11]FIG. 11 is a perspective view of the electric compressor of the first embodiment, showing a part of the casing, a bus bar, a receptacle terminal as a first terminal provided at one end of the bus bar, and a male terminal as a second terminal provided at the other end of the bus bar, as seen from diagonally behind. [Figure 12] FIG. 12 is a perspective view showing the electric compressor of the first embodiment, in which a receptacle terminal provided at one end of a bus bar is connected to a conductive pin of an airtight terminal, and a male terminal provided at the other end of the bus bar is connected to a female terminal serving as an inverter terminal. [Figure 13] FIG. 13 is a schematic diagram of the electric compressor of the second embodiment, showing the inverter housing, the motor housing, the power connector, the communication connector, the electrical connecting members, and the mounting legs as viewed from behind. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, first and second embodiments of the present invention will be described with reference to the drawings.

[0024] Example 1 The electric compressor (hereinafter simply referred to as the compressor) 20 of the first embodiment is specifically a scroll-type electric compressor. The compressor 20 is mounted on a vehicle (not shown) and is used in a vehicle air conditioner. The vehicle air conditioner is a heat pump cycle device that conditions the air inside the vehicle cabin and adjusts the temperature of on-board equipment.

[0025] In this embodiment, the front-rear direction and the up-down direction of the compressor 20 are defined by solid arrows shown in Fig. 1. The front side of the page in Fig. 1 is defined as the left, and the back side of the page is defined as the right. 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 in accordance with Fig. 1. In the following description, the front-rear direction, the up-down direction, and the left-right direction are all based on the front-rear direction, the up-down direction, and the left-right direction in Fig. 1. Note that these directions are an example provided for convenience of explanation, and the attitude of the compressor 20 is changed as appropriate depending on the vehicle in which it is installed, etc.

[0026] 1 to 3, a compressor 20 of the first embodiment constitutes a compressor module 10 incorporated in a heat pump cycle device (not shown). The compressor module 10 integrates a plurality of devices that constitute the heat pump cycle device. Specifically, the compressor module 10 integrates the compressor 20 and, although not shown, for example, an expansion valve, a control valve, an on-off valve, a chiller, a receiver, a water-cooled heat exchanger, and a muffler, all of which are included in the heat pump cycle.

[0027] This heat pump cycle device switches and controls on-off valves and the like according to various operating modes, thereby heating or cooling the air blown into the vehicle cabin with the refrigerant circulating through the refrigerant circuit, and cooling the cooling heat medium circulating through the heat medium circuit with the refrigerant circulating through the refrigerant circuit.

[0028] The compressor module 10 includes a thick, generally rectangular, flat flow path box 12. Multiple devices constituting the heat pump cycle device are attached to the flow path box 12. Although not shown, the flow path box 12 includes a refrigerant passage for circulating a refrigerant that circulates in a refrigerant circuit in the heat pump cycle device, as well as a heat medium passage for circulating a cooling heat medium that circulates in a heat medium circuit.

[0029] The compressor 20 is accommodated within the outer shape of the flow path box 12, which is a rectangular flat plate. In addition, in the positional relationship between the flow path box 12 and the compressor 20, a rotation axis O of a rotating shaft 22 (described later) in the compressor 20 extends parallel to the main surface of the flow path box 12, which has the largest area. More specifically, the rotation axis O of the rotating shaft 22 extends parallel to the longitudinal direction of the main surface of the flow path box 12. Note that the compressor 20 may be disposed so that the rotation axis O of the rotating shaft 22 extends perpendicular to the main surface of the flow path box 12.

[0030] The compressor 20 includes a rotating shaft 22 , a compression section 24 , a motor 26 , an inverter 28 , and a housing 30 .

[0031] The housing 30 includes a compressor housing 32, a motor housing 34, an inverter housing 36, and a support member 37. The compressor housing 32 and the motor housing 34 have a generally cylindrical outer shape. Specifically, the compressor housing 32 has a cylindrical peripheral wall extending in the axial direction of the rotary shaft 22 and a bottom wall connected to the front end of the peripheral wall, forming a cylindrical shape with an open rear end. The motor housing 34 has a cylindrical peripheral wall extending in the axial direction of the rotary shaft 22 and a bottom wall 34B connected to the rear end of the peripheral wall, forming a cylindrical shape with an open front end. The inverter housing 36 has a generally rectangular flat plate shape and a thick plate outer shape. The support member 37 has a generally circular flat plate shape and a thick plate outer shape.

[0032] The rotary shaft 22 is provided inside the compression unit housing 32 and the motor housing 34. The rotary shaft 22 has a cylindrical shape extending in the front-rear direction. The rotary shaft 22 is supported by the motor housing 34 and a shaft support member 37 so as to be rotatable around a rotation axis O.

[0033] The compression unit housing 32 and the motor housing 34 are arranged side by side in the direction of the rotation axis O of the rotary shaft 22. The motor housing 34 is arranged behind the compression unit housing 32.

[0034] The motor housing 34 and the inverter housing 36 are arranged side by side in the radial direction of the rotary shaft 22. That is, the inverter housing 36 is arranged on the side surface of the motor housing 34, i.e., on the outer peripheral surface side of the motor housing 34.

[0035] In the following description, the direction of the rotation axis O will be simply referred to as the axial direction. In other words, the axial direction means the axial direction of the rotation shaft 22, and an axial view means a view from the axial direction of the rotation shaft 22. Furthermore, the radial direction means the radial direction of the rotation shaft 22, i.e., a direction perpendicular to the axial direction of the rotation shaft 22. In the axial view, the direction perpendicular to the axial direction of the rotation shaft 22 includes the width direction and height direction of the inverter housing 36 (extension portion 36B described later). Furthermore, the axial direction coincides with the front-rear direction of the compressor 20, and for convenience of explanation, one side of the axial direction refers to the front of the compressor 20. Furthermore, the width direction of the inverter housing 36 coincides with the left-right direction of the compressor 20, and the height direction of the inverter housing 36 coincides with the up-down direction of the compressor 20.

[0036] The compression unit housing 32, together with the pivotal support member 37, defines a compression unit chamber 32A. The motor housing 34, together with the pivotal support member 37, defines a motor chamber 34A. The motor chamber 34A is formed on the inner circumferential surface of the peripheral wall of the motor housing 34. The inverter housing 36, together with the motor housing 34, defines an inverter chamber 36A. The inverter chamber 36A is formed on the outer circumferential surface of the peripheral wall of the motor housing 34. A pivotal support member 37 is provided between the opening of the compression unit housing 32 and the opening of the motor housing 34, and this pivotal support member 37 defines the compression unit chamber 32A and the motor chamber 34A. The pivotal support member 37 has an insertion hole 37A through which the rotating shaft 22 is inserted, and rotatably supports the rotating shaft 22.

[0037] The compression section 24 is housed in the compression chamber 32A. The compression section 24 compresses the refrigerant by rotation of the rotary shaft 22. The refrigerant is an example of the "fluid" in the present invention. The compression section 24 is connected to the refrigerant passage of the flow path box 12 via a high-pressure refrigerant hose 14. Although not shown, the motor chamber 34A is connected to the refrigerant passage of the flow path box 12 via a low-pressure refrigerant hose. The refrigerant that flows into the motor chamber 34A from the refrigerant passage of the flow path box 12 via the low-pressure refrigerant hose is drawn into the compression section 24 via a suction passage (not shown) provided in the shaft support member 37.

[0038] Although not shown, the compression unit 24 has a fixed scroll and an orbiting scroll. The compression unit 24 changes the volume of a compression chamber formed between the fixed scroll and the orbiting scroll as the orbiting scroll rotates due to rotation of the rotary shaft 22. As a result, the compression unit 24 draws in and compresses refrigerant from the refrigerant passage in the flow path box 12 via the low-pressure refrigerant hose, and discharges the compressed refrigerant. The refrigerant discharged from the compression unit 24 flows out into the refrigerant passage in the flow path box 12 via the high-pressure refrigerant hose 14.

[0039] The motor 26 is housed in the motor chamber 34A. Although not shown, the motor 26 has a stator and a rotor. The stator is connected to the inverter 28. The rotating shaft 22 is fixed to the rotor. When power is supplied from the inverter 28 to the stator, the rotor rotates, and the rotating shaft 22 rotates.

[0040] Inverter 28 is housed in inverter chamber 36A. As shown in FIG. 4, inverter 28 has inverter circuit 28A, control circuit 28B, and high-voltage input filter 28C. Inverter circuit 28A drives motor 26. Control circuit 28B controls inverter circuit 28A. High-voltage input filter 28C reduces noise in the power supplied from external power supply 57 via power connector 56, which will be described later. Inverter circuit 28A, control circuit 28B, and high-voltage input filter 28C are each composed of a circuit board, electronic components mounted on the board, switching elements, etc.

[0041] The compressor 20 has three conductive pins 42 and three female terminals 52. The female terminals 52 are an example of an "inverter terminal" according to the present invention. The three conductive pins 42 are arranged side by side in the left-right direction. Each conductive pin 42 has the same configuration. The three female terminals 52 are arranged side by side in the left-right direction. Each female terminal 52 has the same configuration.

[0042] 6 and 7, the conductive pins 42 are rod-shaped and are provided inside the hermetic terminal 38. Inside the hermetic terminal 38, insulating members are interposed between the conductive pins 42.

[0043] As shown in FIG. 6, the airtight terminal 38 is provided on the bottom wall 34B of the motor housing 34. The other axial end of the motor housing 34 is the bottom wall 34B. The bottom wall 34B is generally disk-shaped and extends radially from the other axial end of the motor housing 34. A first through-hole 34C (see FIG. 1) is formed in the bottom wall 34B, penetrating the axial direction and connecting the motor chamber 34A to the outside. The airtight terminal 38 is disposed in this first through-hole 34C. Each conductive pin 42 provided in the airtight terminal 38 extends linearly in the axial direction and penetrates the bottom wall 34B. The airtight terminal 38 is fixed to the bottom wall 34B by two first fastening members 39. The airtight terminal 38 ensures airtightness within the motor chamber 34A.

[0044] Each conductive pin 42 is electrically connected to the motor 26. One end of each conductive pin 42 is inserted into a resin terminal box 44 disposed in the motor chamber 34A (see FIG. 1). Although not shown, within the terminal box 44, three motor wires extending from the stator of the motor 26 are electrically connected to one end of each conductive pin 42 via connection terminals. The other end of each conductive pin 42 forms a connection end 46 that protrudes from the bottom wall 34B to the outside of the motor chamber 34A and extends in the axial direction.

[0045] 6, the inverter housing 36 has an extension-portion through-hole 48 at the other axial end, i.e., the end of an extension portion 36B (described later). The extension-portion through-hole 48 extends linearly in the axial direction and opens toward the other axial end of the extension portion 36B, connecting the inverter chamber 36A to the outside. The extension-portion through-hole 48 has an oblong hole shape that is long in the left-right direction.

[0046] As shown in FIGS. 1 and 4, each female terminal 52 is provided in the inverter housing 36. Each female terminal 52 is disposed within the inverter chamber 36A. Each female terminal 52 axially faces the extension-portion through-hole 48. As shown in FIG. 12, each female terminal 52 has a pair of clamping pieces that clamp a male terminal 68 (described later) by elastic restoring force. Each female terminal 52 has an open end at the other axial end into which the male terminal 68 is fitted. The open end of each female terminal 52 has an opening diameter that widens toward the other axial end to facilitate insertion of the male terminal 68, which moves axially relative to the female terminal 52. In this way, the female terminal 52 and the male terminal 68 are connected by moving the male terminal 68 axially relative to the female terminal 52 and fitting them together.

[0047] Each female terminal 52 is electrically connected to the inverter circuit 28A via three conductive members 54 (see FIG. 4).

[0048] As shown in Fig. 6, the inverter housing 36 has an extension portion 36B that extends in the axial direction away from the peripheral wall beyond the bottom wall 34B of the motor housing 34. The extension portion 36B extends in the other axial direction beyond the bottom wall 34B. As also shown in Fig. 4, the rear end of the inverter housing 36 forms the extension portion 36B. In the left-right direction, the width of the extension portion 36B is equal to the width of the rest of the inverter housing 36 other than the extension portion 36B. With respect to the bottom wall 34B of the motor housing 34, the extension portion 36B protrudes in the axial direction beyond an electrical connection member 60, which will be described later.

[0049] As shown in FIGS. 1 to 4, a power connector 56 and a communication connector 58 are connected to the extension portion 36B. The power connector 56 is an example of a "high-voltage connector" in the present invention. The communication connector 58 is an example of a "low-voltage connector" in the present invention. The power connector 56 supplies power from an external power source 57 to the motor 26. The external power source 57 is an example of a "high-voltage power source" in the present invention. The communication connector 58 transmits a control signal from an external control device 59, which has lower power than the external power source 57, to the control circuit 28B of the inverter 28. The external control device 59 is an example of a "low-voltage power source" in the present invention.

[0050] 5 and 6, the power connector 56 and the communication connector 58 are connected to the outer bottom surface 36C of the extension portion 36B on the motor housing 34 side. When viewed in the axial direction, a portion of the power connector 56 overlaps the bottom wall 34B, and a portion of the communication connector 58 overlaps the bottom wall 34B.

[0051] 7, a mounting base 70 is integrally formed on the left end portion on the other axial side of the outer bottom surface 36C of the extension portion 36B. The mounting base 70 has one end that opens to the outer bottom surface 36C and the other end that opens to an end surface 70A on the other axial side of the mounting base 70, and a first communication hole 71 that extends in a substantially L-shape within the mounting base 70. The first communication hole 71 connects the inside of the inverter chamber 36A to the outside.

[0052] As shown in Figure 8, the power connector 56 is fixed to the other axial end face 70A of the mounting base 70 by four third fastening members 72. Note that Figure 8 shows three of the four third fastening members 72. The power connector 56 has a power connector connection portion 56A.

[0053] As shown in FIGS. 1, 2 and 4, the rear end of the power connector connection portion 56A of the power connector 56 protrudes slightly in the axial direction beyond the extension portion 36B.

[0054] One end of a power cable 57A is connected to the external power supply 57. The power cable 57A is an example of a "high voltage cable" according to the present invention. The other end of the power cable 57A is provided with a power cable connector 57B. The power cable connector 57B is an example of a "high voltage cable connector" according to the present invention. The power cable connector 57B is connected axially to a power connector connection portion 56A of the power connector 56.

[0055] 6, a second communication hole 73 is formed in the right end portion on the other axial side of the outer bottom surface 36C of the extension portion 36B. The second communication hole 73 communicates between the inverter chamber 36A and the outside.

[0056] 8, the communication connector 58 is fixed by a fastening member (not shown) at a location corresponding to the second communication hole 73. The communication connector 58 has a communication connector connecting portion 58A.

[0057] As shown in FIGS. 2 and 4, the rear end of communication connector connecting portion 58A of communication connector 58 protrudes slightly in the axial direction beyond extension portion 36B.

[0058] One end of a communication cable 59A is connected to the external control device 59. The communication cable 59A is an example of a "low-voltage cable" according to the present invention. The other end of the communication cable 59A is provided with a communication cable connector 59B. The communication cable connector 59B is an example of a "low-voltage cable connector" according to the present invention. The communication cable connector 59B is connected axially to a communication connector connection portion 58A of the communication connector 58.

[0059] The power connector connection portion 56A of the power connector 56 is electrically connected to the inverter circuit 28A of the inverter 28 via a power-side conductive member (not shown). The communication connector connection portion 58A of the communication connector 58 is electrically connected to the control circuit 28B of the inverter 28 via a communication-side conductive member (not shown).

[0060] As shown in Fig. 5, the power connector 56 and the communication connector 58 are disposed within the width of the extension portion 36B when viewed in the axial direction. The two-dot chain line shown in Fig. 5 represents a circumscribing rectangle ER that encompasses the inverter housing 36, including the extension portion 36B, and the motor housing 34 when viewed in the axial direction. When viewed in the axial direction, the power connector 56, the communication connector 58, and an electrical connection member 60 (described later) disposed between the two connectors are disposed within the circumscribing rectangle ER.

[0061] An electrical connection member 60 is disposed on the outside of the housing 30 on the other side in the axial direction. The electrical connection member 60 is provided between the bottom wall 34B and the extension portion 36B of the motor housing 34. The electrical connection member 60 is fixed to the bottom wall 34B by two second fastening members 61 (see FIG. 9 ), with a head portion 60B (described later) passing through the extension portion through-hole 48. The electrical connection member 60 electrically connects the conductive pins 42 and the female terminals 52. When attaching the electrical connection member 60, by moving the electrical connection member 60 in the axial direction, each receptacle terminal 66 (described later) is connected to the connection end portion 46 of each conductive pin 42, and each male terminal 68 (described later) is connected to each female terminal 52 by fitting.

[0062] As shown in Fig. 3, the electrical connection member 60 is disposed on an imaginary straight line VL. The imaginary straight line VL passes through the rotational axis O of the rotating shaft 22 and extends in the up-down direction perpendicular to the axial direction. As also shown in Fig. 5, a power connector 56 and a communication connector 58 are disposed on either side of the electrical connection member 60 in the left-right direction perpendicular to the axial direction. That is, the power connector 56 is disposed on the opposite side of the communication connector 58 with the electrical connection member 60 sandwiched therebetween.

[0063] 9, the electrical connection member 60 has a body portion 60A and a head portion 60B. In a cross section perpendicular to the axial direction (front-rear direction), the body portion 60A has a generally rectangular shape. In a cross section perpendicular to the axial direction, the head portion 60B has a generally oval shape that is long in the left-right direction and has a pair of straight line portions that extend parallel to the left-right direction.

[0064] 10 to 12, the electrical connection member 60 has a housing 62, three bus bars 64, three receptacle terminals 66, and three male terminals 68. The receptacle terminals 66 are an example of the "first terminals" in the present invention. The male terminals 68 are an example of the "second terminals" in the present invention.

[0065] The male terminal 68 is formed integrally with one end of the bus bar 64 on one axial side. The male terminal 68 extends linearly in the axial direction.

[0066] As shown in Fig. 10, the male terminal 68 is disposed outside the accommodating case 62. The male terminal 68 is inserted into the inverter chamber 36A through the extension-portion through-hole 48. Then, as shown in Figs. 1 and 12, the male terminal 68 is connected to the female terminal 52 disposed inside the inverter chamber 36A.

[0067] The receptacle terminal 66 is fixed to the other end of the bus bar 64. The receptacle terminal 66 is fixed at a predetermined position inside the accommodating case 62. That is, as the accommodating case 62 is moved in the planar direction of the bottom wall 34B of the motor housing 34, the receptacle terminal 66 also moves in the planar direction of the bottom wall 34B of the motor housing 34. The diameter of the opening in the receptacle terminal 66, through which the connection end 46 of the conductive pin 42 is introduced, is the same as the diameter of the connection end 46 of the conductive pin 42.

[0068] As shown in FIG. 11 , each bus bar 64 is disposed such that the thickness direction of the bus bar 64 coincides with the direction perpendicular to the axial direction. Each bus bar 64 has a strip shape and is integrally formed by bending a metal plate or the like. Each bus bar 64 has three edgewise bent portions and two flatwise bent portions. More specifically, each bus bar 64 has, in order from the other end toward the one end, a first flatwise bent portion 64A, a second flatwise bent portion 64B, a first edgewise bent portion 64C, a second edgewise bent portion 64D, and a third edgewise bent portion 64E.

[0069] In this way, each bus bar 64 is bent edgewise so that the male terminals 68 can be mated with the female terminals 52, and is bent flatwise so that the position of the receptacle terminals 66 can be adjusted in the plane direction of the bottom wall 34B of the motor housing 34.

[0070] That is, with respect to the position of the male terminal 68 provided at one end of each bus bar 64, the receptacle terminal 66 provided at the other end of the bus bar 64 can swing in a direction perpendicular to the axial direction, that is, in the plane of the bottom wall 34B of the motor housing 34, about the first flatwise bent portion 64A as a base point. Each bus bar 64 is accommodated in the accommodating case 62. Therefore, as the accommodating case 62 is moved in the plane of the bottom wall 34B of the motor housing 34, the receptacle terminal 66 provided at the other end of each bus bar 64 accommodated in the accommodating case 62 can swing in the plane of the bottom wall 34B of the motor housing 34. As a result, with respect to each bus bar 64, the male terminal 68 can be mated with the female terminal 52, and the receptacle terminal 66 can be mated with the conductive pin 42.

[0071] As shown in FIG. 10, the accommodating 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.

[0072] In a cross section perpendicular to the axial direction, the base portion 62A and the cover portion 62B have a body portion equivalent portion having a shape corresponding to the body portion 60A of the electrical connection member 60, and a head portion equivalent portion having a shape corresponding to the head portion 60B of the electrical connection member 60.

[0073] 10 and 11, the base portion 62A has two first insertion holes 65A, two second insertion holes 65B, three second through holes 65C, and one third insertion hole 65D. Each of the first insertion holes 65A, each of the second insertion holes 65B, and each of the second through holes 65C is formed in the portion corresponding to the body. The third insertion hole 65D is formed in the portion corresponding to the head.

[0074] The portion of the base 62A corresponding to the body is disposed so as to surround the hermetic terminal 38 provided on the bottom wall 34B. In other words, the hermetic terminal 38 is accommodated within the accommodating case 62, and is not exposed to the outside.

[0075] A first fastening member 39 for fixing the airtight terminal 38 to the bottom wall 34B is inserted through each first insertion hole 65A. A second fastening member 61 for fixing the electrical connection member 60 to the bottom wall 34B is inserted through each second insertion hole 65B. The connection end 46 of each conductive pin 42 passes through each second through hole 65C. The portions of the three bus bars 64 on the male terminal 68 side and a part of the accommodating case 62 are inserted through the third insertion hole 65D.

[0076] The cover portion 62B is integrated with the base portion 62A, sandwiching the bus bars 64 and the receptacle terminals 66 between the cover portion 62B and the base portion 62A. That is, the bus bars 64 and the receptacle terminals 66 are housed within the housing case 62. The cover portion 62B insulates the bus bars 64 from one another.

[0077] The first seal portion 62C is made of an annular packing that surrounds the portion of the base portion 62A that corresponds to the body portion. As shown in Fig. 7, when the electrical connection member 60 is attached to the bottom wall 34B, the end face of the annular first seal portion 62C abuts against the bottom wall 34B, thereby forming a flat seal portion.

[0078] The second seal portion 62D is disposed in a portion corresponding to the head of the cover portion 62B. The second seal portion 62D is made of an annular packing having an outer circumferential surface shape corresponding to the inner circumferential surface shape of the extension portion through hole 48 of the inverter housing 36. As shown in Fig. 7, when the electrical connection member 60 is attached to the bottom wall 34B, the outer circumferential surface of the annular second seal portion 62D abuts against the inner circumferential surface of the extension portion through hole 48, thereby forming a cylindrical (tubular) seal portion.

[0079] 1 to 3, the housing 30 is provided with three mounting legs 80. Each mounting leg 80 is formed integrally with the outer surface of the housing 30, i.e., the outer peripheral surface of the peripheral wall of the motor housing 34 and the outer peripheral surface of the peripheral wall of the compression unit housing 32.

[0080] Two of the three mounting legs 80 are provided on the motor housing 34, and the remaining one is provided on the compression unit housing 32. Specifically, a mounting leg 80 is provided at the rear end of the motor housing 34, at the lower left end and at the lower right end. In addition, a mounting leg 80 is provided at the rear end of the compression unit housing 32, at the lower right end.

[0081] As shown in FIG. 5 , in an axial view, three mounting legs 80 are arranged within a circumscribed rectangle ER of the housing 30, which includes the inverter housing 36 and the motor housing 34. Furthermore, in an axial view, the three mounting legs 80 are arranged on the opposite side of the inverter housing 36, with the power connector 56 and the communication connector 58 sandwiched between them. Specifically, in an axial view, the mounting leg 80 provided at the lower left end at the rear end of the motor housing 34 is arranged on the opposite side of the inverter housing 36, with the power connector 56 sandwiched between them. The mounting leg 80 provided at the lower left end at the rear end of the motor housing 34 and the power connector 56 are spaced a predetermined distance apart in the vertical direction. Furthermore, in an axial view, the mounting leg 80 provided at the lower right end at the rear end of the motor housing 34 and the mounting leg 80 provided at the lower right end at the rear end of the compression unit housing 32 are arranged on the opposite side of the inverter housing 36, with the communication connector 58 sandwiched between them. A mounting leg 80 provided at the rear end of the motor housing 34 at the lower right end and the communication connector 58 are spaced a predetermined distance apart in the vertical direction.

[0082] Each mounting leg 80 extends parallel to the vertical direction. In other words, each mounting leg 80 extends perpendicular or substantially perpendicular to the circuit board on which the inverter circuit 28A is mounted in the inverter chamber 36A. Each mounting leg 80 extends vertically and has a female screw hole 80A that opens downward.

[0083] As shown in Figures 1 to 3, the flow path box 12 is provided with three plate-shaped mounting portions 82. The mounting portions 82 are an example of an "object to be mounted" in the present invention. Each mounting portion 82 extends horizontally leftward from the left side surface 12A of the flow path box 12. Each mounting portion 82 has a mounting hole 82A at a position corresponding to each mounting leg 80.

[0084] A damper 84 is disposed in each mounting hole 82A. Although not shown, each damper 84 has an outer cylinder, an inner cylinder, and a cylindrical rubber elastic body that connects the outer cylinder and the inner cylinder. The outer cylinder of the damper 84 is fitted into each mounting hole 82A. A male thread portion 86A of a fourth fastening member 86 for fastening the mounting leg 80 to the mounted portion 82 is inserted into the inner cylinder of each damper 84. The male thread portion 86A of each fourth fastening member 86 is screwed into the female threaded hole 80A of the mounting leg 80. In this way, the compressor 20 is fixed to the flow path box 12 by three-point support at the locations of the three mounting legs 80.

[0085] In this compressor 20, a power connector 56 and a communication connector 58 are connected to an outer bottom surface 36C, which is the lower surface of an extension portion 36B of the inverter housing 36 that extends axially beyond the bottom wall 34B of the motor housing 34. The power connector 56 and the communication connector 58 are arranged so as to overlap with the bottom wall 34B in an axial view. This prevents the inverter housing 36 from becoming larger in the radial direction, which is a direction perpendicular to the axial direction, and in the up-down direction, compared to when these connectors are provided so as to protrude from the upper surface of the extension portion 36B. Furthermore, the bottom wall 34B prevents the power connector 56 and the communication connector 58 from being damaged by external impact in the axial direction.

[0086] Moreover, because the power connector 56 and the communication connector 58 are disposed within the width of the extension portion 36B when viewed in the axial direction, it is possible to prevent the inverter housing 36 from becoming larger in size in the width direction, which is the direction perpendicular to the axial direction, due to the power connector 56 and the communication connector 58. It is also possible to prevent the power connector 56 and the communication connector 58 from being damaged by external impact in the width direction of the inverter housing 36.

[0087] Therefore, in a compressor 20 in which an inverter housing 36 is provided on the peripheral wall of a motor housing 34, it is possible to prevent the inverter housing 36 from becoming larger in the direction perpendicular to the axial direction, and to prevent damage to the power connector 56 and the communication connector 58.

[0088] Furthermore, in this compressor 20, the electrical connection member 60 that electrically connects the conductive pins 42 and the female terminals 52 is disposed between the power connector 56 and the communication connector 58 when viewed in the axial direction. This makes it easier to increase the distance between the power connector 56 and the communication connector 58, which is advantageous for reducing noise propagating from the power connector 56 to the communication connector 58. Furthermore, because the electrical connection member 60 does not protrude from the extension portion 60 in the width direction, the electrical connection member 60 does not increase the size of the compressor 20 in the width direction of the inverter housing 36. Furthermore, damage to the electrical connection member 60 due to external impact can be reduced in the axial direction and the width direction of the inverter housing 36.

[0089] Furthermore, in this compressor 20, the connection between the conductive pin 42 and the receptacle terminal 66 in the electrical connection member 60, and the connection between the male terminal 68 and the female terminal 52 in the inverter housing 36, are made by axial movement of the electrical connection member 60. The connection between the power connector 56 and the power cable 57A, and the connection between the communication connector 58 and the communication cable 59A are also made axially. This makes these connections easy, and also makes it easy to ensure working space for these connections. As a result, the assembly of the compressor 20 can be simplified.

[0090] Furthermore, in this compressor 20, the mounting legs 80 for attaching the housing 30 to the mounting portion 82 are separated from the inverter housing 36 by the power connector 56 and the communication connector 58. That is, the mounting leg 80 provided at the bottom of the left end of the motor housing 34 is separated from the inverter housing 36 by the power connector 56. Furthermore, the mounting leg 80 provided at the bottom of the right end of the motor housing 34 is separated from the inverter housing 36 by the communication connector 58. Therefore, even if the mounting legs 80 are damaged by an external impact, the effects of this damage are unlikely to extend to the inverter housing 36. As a result, damage to the inverter circuit 28A and the like due to damage to the mounting legs 80 can be reduced.

[0091] Furthermore, in this compressor 20, the three mounting legs 80 provided on the housing 30, the power connector 56, the communication connector 58, and the electrical connection members 60 are arranged within the circumscribing rectangle ER of the housing 30 when viewed in the axial direction, and these members do not protrude from the circumscribing rectangle ER. This prevents the mounting legs 80 and other components from protruding from the circumscribing rectangle ER, which would otherwise increase the size of the compressor 20 in the width and height directions of the inverter housing 36, which are directions perpendicular to the axial direction. This also prevents the mounting legs 80 and other components from being damaged by external impact in the axial direction and the width direction of the inverter housing 36.

[0092] Furthermore, in this compressor 20, the flat seal formed by the first seal portion 62C provided on the electrical connection member 60 ensures airtightness within the accommodating case 62 surrounding the airtight terminal 38, and the cylindrical seal formed by the second seal portion 62D provided on the electrical connection member 60 ensures airtightness around the extension-portion through-hole 48 of the inverter housing 36. Therefore, the electrical connection member 60 can easily ensure airtightness of the inverter chamber 36A and the motor chamber 34A.

[0093] Furthermore, in this compressor 20, the inverter housing 36 is disposed on the outer peripheral surface side of the motor housing 34, and the motor housing 34 and the inverter housing 36 are disposed side by side in the radial direction, which prevents the axial length of the compressor 20 from increasing.

[0094] Furthermore, in this compressor 20, a portion of the power connector 56 and a portion of the communication connector 58 overlap with the extending portion 36B in the axial direction. Therefore, the length by which the power connector 56 and the communication connector 58 protrude in the axial direction from the extending portion 36B can be reduced by the amount of the overlapping portion.

[0095] Example 2 13, compressor 21 of the second embodiment has three mounting legs 88 and the like provided on the outer surface of housing 30. Specifically, one mounting leg 88 is integrally formed on the outer circumferential surface of the peripheral wall of motor housing 34, and two mounting legs (not shown) are integrally formed on the outer circumferential surface of the peripheral wall of the compression unit housing.

[0096] The mounting leg 88 provided on the motor housing 34 is located at the lower rear end of the motor housing 34. The two mounting legs provided on the compression unit housing are located at the upper and lower rear ends of the compression unit housing, respectively.

[0097] These mounting legs 88 etc. extend parallel to the left-right direction. In other words, each mounting leg 88 etc. extends parallel or approximately parallel to the circuit board on which the inverter circuit is mounted. The mounting leg 88 provided on the motor housing 34 extends in the left-right direction and has a screw insertion hole 88A that is open at both ends. The two mounting legs provided on the compression unit housing also have similar screw insertion holes (not shown).

[0098] Although not shown, each of the mounting legs 88 etc. is fixed to each of the mounting portions extending from the flow path box by a fastening member inserted into the screw insertion hole 88A etc.

[0099] When viewed in the axial direction, the lower halves of the mounting legs 88 provided at the lower end of the motor housing 34 and the mounting legs provided at the lower end of the compression unit housing extend downwardly beyond the circumscribed rectangle ER of the housing 30. On the other hand, the upper halves of the mounting legs 88 provided at the lower end of the motor housing 34 and the mounting legs provided at the lower end of the compression unit housing, and the mounting legs provided at the upper end of the compression unit housing are located within the circumscribed rectangle ER of the housing 30.

[0100] For this reason, this compressor 21 is slightly larger in the vertical direction compared to the compressor 20 of Example 1, since the lower half of the mounting legs 88, etc., provided at the lower end of the housing 30 protrude from the circumscribed rectangle ER.

[0101] Furthermore, the mounting legs 88 provided at the lower end of the motor housing 34 are separated from the inverter housing 36 by the electrical connection members 60. Therefore, even if the mounting legs 88 are damaged, the effects of this damage are unlikely to extend to the inverter housing 36. As a result, damage to the inverter circuit 28A and the like due to damage to the mounting legs 88 can be reduced.

[0102] The other configurations and effects are the same as those of the first embodiment.

[0103] The present invention has been described above in accordance with Examples 1 and 2, but it goes without saying that the present invention is not limited to the above Examples 1 and 2, and can be modified and applied as appropriate within the scope of the invention.

[0104] For example, in the compressor 20 of Example 1, the rear end portion of the inverter housing 36 is the extension portion 36B, and in the left-right direction of the compressor 20, the width of the extension portion 36B is equal to the width of other portions of the inverter housing 36 other than the extension portion 36B, but the present invention is not limited to this, and the shape and size of the extension portion 36B can be set as appropriate.

[0105] In compressor 20 of the first embodiment, the rear end of power connector 56 and the rear end of communication connector 58 protrude slightly in the axial direction beyond extension portion 36B, but the present invention is not limited to this. For example, the high-voltage connector may entirely overlap with extension portion 36B in the axial direction, so that the high-voltage connector does not protrude in the axial direction from extension portion 36B, or the low-voltage connector may entirely overlap with extension portion 36B in the axial direction, so that the low-voltage connector does not protrude in the axial direction from extension portion 36B.

[0106] In the compressor 20 of the first embodiment, the power connector 56 and the communication connector 58 are arranged side by side in the width direction of the extension portion 36B (the left-right direction of the compressor 20) when viewed in the axial direction, but the present invention is not limited to this. For example, when viewed in the axial direction, the high-voltage connector and the low-voltage connector may be arranged side by side in the up-down direction of the compressor 20 (a direction perpendicular or approximately perpendicular to the circuit board) within the width range of the extension portion 36B.

[0107] In compressor 20 of the first embodiment, power cable 57A is axially connected to power connector 56, and communication cable 59A is axially connected to communication connector 58, but the present invention is not limited to this. For example, a high-voltage cable may be connected to the high-voltage connector from below compressor 20 (in a direction perpendicular or nearly perpendicular to the circuit board), and a low-voltage cable may be connected to the low-voltage connector from below compressor 20 (in a direction perpendicular or nearly perpendicular to the circuit board).

[0108] In the compressor 20 of the first embodiment, the power connector 56 and the communication connector 58 are provided on the outer bottom surface 36C of the extension portion 36B, but the present invention is not limited to this. For example, a high-voltage connector or a low-voltage connector may be provided on the other axial end surface (rear end surface) of the extension portion 36B (inverter housing 36).

[0109] In the compressor 20 of the first embodiment, the diameter of the opening in the receptacle terminal 66 through which the connection end 46 of the conductive pin 42 is introduced is the same as the diameter of the connection end 46 of the conductive pin 42, but the present invention is not limited to this. For example, the diameter of the opening in the receptacle terminal 66 may be larger than the diameter R2 of the connection end 46 of the conductive pin 42. In this case, it becomes easier to adjust the position of the receptacle terminal 66 relative to the conductive pin 42, which can further improve the ease of assembly of the electric compressor.

[0110] In the compressor 20 of the first embodiment, the base portion 62A and the cover portion 62B of the housing case 62 are made of resin, but the present invention is not limited to this. For example, the cover portion 62B may be made of metal to shield against electromagnetic noise, etc. [Industrial Applicability]

[0111] The present invention can be used in air conditioning systems for vehicles and the like. [Explanation of symbols]

[0112] 20, 21...Electric compressor 22...Rotation axis 24...Compression section 26...Motor 28...Inverter 28A...Inverter circuit 32...Compression section housing 32A...Compression chamber 34...Motor housing 34A...Motor room 34B…Bottom wall 36...Inverter housing 36A...Inverter room 36B...Extension part 37... Shaft support member 37A...Through hole 42...Conductive pin 48...Extension part through hole 52...Female terminal (inverter terminal) 56...Power connector (high voltage connector) 57...External power supply (high voltage power supply) 57A...Power cable (high voltage cable) 57B...Power cable connector (high voltage cable connector) 58...Communication connector (low voltage connector) 59...External control device (low voltage power supply) 59A...Communication cable (low voltage cable) 59B...Communication cable connector (low voltage cable connector) 60...Electrical connection member 64...Busbar 66...Receptacle terminal (first terminal) 68...Male terminal (second terminal) 80...Mounting leg 82...Attached part (attachment target)

Claims

1. A rotation axis; a compression unit that is driven by rotation of the rotary shaft and compresses the fluid; a motor that rotates the rotary shaft; an inverter having an inverter circuit that drives the motor; a housing that accommodates the rotating shaft, the compression unit, the motor, and the inverter, The housing includes: a motor housing having a cylindrical shape with a bottom, the motor housing having a cylindrical peripheral wall extending in the axial direction of the rotary shaft and a bottom wall connected to one end of the peripheral wall, the motor being accommodated on an inner peripheral surface side of the peripheral wall; an inverter housing provided on the peripheral wall and accommodating the inverter; a compression unit housing having a cylindrical shape with a bottom, the compression unit housing being disposed on the opposite side of the bottom wall with the motor interposed therebetween and configured to accommodate the compression unit; a shaft support member that is provided between the opening of the motor housing and the opening of the compression unit housing, that defines, together with the motor housing, a motor chamber that houses the motor, and that defines, together with the compression unit housing, a compression unit chamber that houses the compression unit, and that has an insertion hole through which the rotating shaft is inserted and rotatably supports the rotating shaft, the inverter housing has an extension portion that extends in the axial direction away from the peripheral wall beyond the bottom wall, The extension portion has a high voltage connector for supplying power from a high voltage power supply to the motor; a low voltage connector for supplying a power from a low voltage power source to the inverter that is less than the power of the high voltage power source; The electric compressor, characterized in that the high-voltage connector and the low-voltage connector overlap the bottom wall when viewed in the axial direction of the rotating shaft and are arranged within a width range of the extension portion.

2. The motor housing is provided with a conductive pin that is electrically connected to the motor and that penetrates the bottom wall, The inverter housing accommodates inverter terminals electrically connected to the inverter circuit, and has an extension-portion through-hole formed therein that opens into the extension portion, an electrical connection member is provided between the bottom wall and the extension portion, the electrical connection member passing through the extension portion through-hole and electrically connecting the conductive pin and the inverter terminal; 2. The electric compressor according to claim 1, wherein the high-voltage connector is disposed on an opposite side to the low-voltage connector with the electrical connection member interposed therebetween when viewed in the axial direction.

3. the electrical connection member includes a plate-shaped bus bar, a first terminal provided at one end of the bus bar and connected to the conductive pin outside the motor housing, and a second terminal provided at the other end of the bus bar and connected to the inverter terminal inside the inverter housing, the first terminal and the conductive pin are connected in the axial direction, the second terminal and the inverter terminal are connected in the axial direction, a high-voltage cable connector provided at one end of a high-voltage cable that supplies power from the high-voltage power supply and the high-voltage connector are connected in the axial direction; 3. The electric compressor according to claim 2, wherein a low-voltage cable connector provided at one end of a low-voltage cable for supplying power from the low-voltage power supply is connected to the low-voltage connector in the axial direction.

4. The peripheral wall is provided with a pair of mounting legs for mounting the motor housing to an object, 4. The electric compressor according to claim 1, wherein, when viewed in the axial direction, one of the mounting legs is disposed on the opposite side of the inverter housing with the high-voltage connector therebetween, and the other of the mounting legs is disposed on the opposite side of the inverter housing with the low-voltage connector therebetween.

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