CN116006432A

CN116006432A - Electric compressor

Info

Publication number: CN116006432A
Application number: CN202210924339.5A
Authority: CN
Inventors: 内藤笃志; 岩濑裕亮; 木下雄介; 藤井明夫
Original assignee: Toyota Industries Corp
Current assignee: Toyota Industries Corp
Priority date: 2021-10-22
Filing date: 2022-08-02
Publication date: 2023-04-25
Also published as: JP2023062981A; JP7533420B2

Abstract

The invention relates to an electric compressor, which aims to realize miniaturization of the electric compressor. The first detection wiring (61) and the second detection wiring (62) are connected to the connector (80) from a direction orthogonal to the thickness direction of the circuit board (31). Therefore, the connector (80) and the circuit board (31) can be arranged in the inverter chamber (32) in a state of overlapping in the thickness direction of the circuit board (31). Therefore, for example, compared with the case that the connector (80) and the circuit board (31) are arranged in the inverter chamber (32) in a state of not overlapping in the thickness direction of the circuit board (31), the space saving in the inverter chamber (32) is realized.

Description

Electric compressor

Technical Field

The present invention relates to an electric compressor.

Background

The electric compressor includes a compression unit, an electric motor, and an inverter device. The compression unit compresses a fluid. The electric motor drives the compression unit. The inverter device has a circuit board. A driving circuit is mounted on the circuit board. The driving circuit is driven by electric power from a low-voltage power supply. The motor-driven compressor further includes a high-voltage connector connection unit. The high-voltage connector of the high-voltage power supply is connected to the high-voltage connector connection portion. The inverter device converts dc power from the high-voltage power supply into ac power by driving the drive circuit, and supplies the ac power to the electric motor, thereby driving the electric motor. The housing of the motor-driven compressor has an inverter chamber for housing a circuit board.

However, in such an electric compressor, a technique for detecting a connection state with a high-voltage connector at a high-voltage connector connection portion is conventionally known, for example, as in patent document 1. In this case, for example, the high-voltage connector connection portion has a first detection wiring and a second detection wiring. The first detection wiring can be connected to one end of a detection conductor provided in the high-voltage connector. The second detection wiring can be connected to the other end of the detection conductor.

The first detection wiring, the detection conductor, and the second detection wiring are in a conductive state of the series circuit when the high-voltage connector connection portion is connected to the high-voltage connector, and form a closed loop circuit together with a detection circuit that detects a connection state of the high-voltage connector connection portion to the high-voltage connector. On the other hand, when the high-voltage connector is in a disconnected state with respect to the high-voltage connector connection portion, the series circuit of the first detection wiring, the detection conductor, and the second detection wiring is rendered non-conductive, and no closed-loop circuit is formed with the detection circuit. When the series circuit of the first detection wiring, the detection conductor, and the second detection wiring is non-conductive, the detection circuit transmits a disconnection detection signal indicating that the high-voltage connector connection unit is disconnected from the high-voltage connector to, for example, the host ECU. When receiving the disconnection detection signal from the detection circuit, the host ECU alerts the user that the high-voltage connector connection unit and the high-voltage connector are disconnected.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2020-145848

Disclosure of Invention

Problems to be solved by the invention

However, in such an electric compressor, a connector for electrically connecting a first detection wire and a second detection wire extending from the high-voltage connector connection portion into the inverter chamber to the detection circuit may be disposed in the inverter chamber. Here, if the volume specification of the circuit board is uniquely determined, there are cases where the arrangement position of the connector with respect to the circuit board is restricted according to the connection method of the first detection wiring and the second detection wiring to the connector. As described above, there is a possibility that the size of the electric compressor is increased in order to secure a space for disposing the connector in the inverter chamber. Therefore, it is desired to reduce the space in the inverter chamber and to reduce the size of the motor-driven compressor.

Means for solving the problems

An electric compressor for solving the above problems includes: a compression unit that compresses a fluid; an electric motor that drives the compression unit; an inverter device having a circuit board on which a drive circuit driven by electric power from a low-voltage power supply is mounted, and which converts direct-current electric power from a high-voltage power supply into alternating-current electric power by driving of the drive circuit and supplies the alternating-current electric power to the electric motor, thereby driving the electric motor; a housing having an inverter chamber for accommodating the circuit board; and a high-voltage connector connection portion to which a high-voltage connector of the high-voltage power supply is connected, the high-voltage connector connection portion having: a first detection wiring connectable to one end of a detection conductor provided in the high-voltage connector; and a second detection wiring that is connectable to the other end of the detection conductor, wherein the first detection wiring, the detection conductor, and the second detection wiring are in a conductive state of a series circuit when the high-voltage connector connection portion is connected to the high-voltage connector, and form a closed-loop circuit together with a detection circuit that detects a connection state of the high-voltage connector connection portion to the high-voltage connector, and a connector that electrically connects the first detection wiring and the second detection wiring extending from the high-voltage connector connection portion into the inverter chamber to the detection circuit is disposed in the inverter chamber, wherein the connector and the circuit board are disposed in a state overlapping in a thickness direction of the circuit board, and the first detection wiring and the second detection wiring are connected to the connector from a direction intersecting the thickness direction of the circuit board.

Thus, the first detection wiring and the second detection wiring are connected to the connector from a direction intersecting the thickness direction of the circuit board. Therefore, the connector and the circuit board can be arranged in the inverter chamber in a state of being overlapped in the thickness direction of the circuit board. Therefore, for example, the space in the inverter chamber can be saved as compared with a case where the connector and the circuit board are disposed in the inverter chamber in a state of not overlapping in the thickness direction of the circuit board. As a result, the motor-driven compressor can be miniaturized.

In the above-described electric compressor, the electric compressor may include a low-voltage connector connecting portion to which a low-voltage connector of the low-voltage power supply is connected, the low-voltage connector connecting portion including: a third detection wiring connectable to a first detection connection conductor provided in the low-voltage connector and electrically connected to the detection circuit; and a fourth detection wiring that can be connected to a second detection connection conductor provided in the low-voltage connector and electrically connected to the detection circuit, wherein the connector connects the first detection wiring to the third detection wiring and connects the second detection wiring to the fourth detection wiring.

Thus, the detection conductor, the first detection wiring, the second detection wiring, the third detection wiring, the fourth detection wiring, the first detection connection conductor, and the second detection connection conductor form a closed-loop circuit together with the detection circuit. Therefore, when forming a closed-loop circuit together with the detection circuit, for example, no pattern via the circuit substrate is required. Thus, the circuit board is not enlarged by forming a pattern for a closed loop circuit. Therefore, for example, the circuit board is prevented from unnecessarily increasing in size, and thus the space in the inverter chamber can be saved. As a result, the motor-driven compressor can be further miniaturized.

In the above-described motor-driven compressor, the driving circuit may include: a high voltage circuit for driving the electric motor; and a low-voltage circuit that controls the high-voltage circuit, wherein the connector is disposed in the inverter chamber in a state of overlapping with a portion of the circuit board on which the low-voltage circuit is mounted in a thickness direction of the circuit board.

Thus, for example, the insulation distance between the connector and the circuit board can be shortened as compared with a case where the connector and the portion of the circuit board where the high-voltage circuit is mounted overlap in the thickness direction of the circuit board. Therefore, the connector and the circuit board can be brought close to each other as much as possible, and thus the space in the inverter chamber can be saved. As a result, the motor-driven compressor can be further miniaturized.

Effects of the invention

According to the present invention, the motor-driven compressor can be miniaturized.

Drawings

Fig. 1 is a side sectional view for explaining an electric compressor of an embodiment.

Fig. 2 is a sectional view showing a part of the motor-driven compressor in an enlarged manner.

Fig. 3 is a plan view of the inverter chamber in plan view.

Description of the reference numerals

10 … motor compressor; 11 … shell; 16 … compression; 17 … electric motor; 30 … inverter device; 31 … circuit substrate; 32 … inverter chamber; 33 … drive circuit; 34 … high voltage circuit; 35 … low voltage circuit; 40 … high voltage connector connection; 41 … high voltage power supply; 42 … high voltage connector; 50 … low voltage connector connection; 51 … low voltage power supply; 52 … low voltage connector; 61 … first detecting wirings; 62 … second detecting wirings; 63 … third detecting wirings; 64 … fourth detecting wirings; 70 … detecting conductors; 71 … first detecting connecting conductors; 72 … second detecting connecting conductors; 73 … detection circuitry; 80 … connector.

Detailed Description

An embodiment of the motor-driven compressor will be described below with reference to fig. 1 to 3. The electric compressor of the present embodiment is used for, for example, a vehicle air conditioner.

(integral Structure of electric compressor 10)

As shown in fig. 1, the motor-driven compressor 10 includes a housing 11. The housing 11 has a motor housing 12, a discharge housing 13, and an inverter housing 14. The motor case 12, the discharge case 13, and the inverter case 14 are made of metal, for example, aluminum.

The motor case 12 has a plate-shaped end wall 12a and a peripheral wall 12b extending cylindrically from the outer peripheral portion of the end wall 12a. The discharge housing 13 has a cylindrical shape. The discharge casing 13 is connected to a portion of the peripheral wall 12b of the motor case 12 opposite to the end wall 12a. The discharge housing 13 closes an opening in the motor case 12 on the opposite side of the end wall 12a.

The motor-driven compressor 10 includes a rotary shaft 15. The rotary shaft 15 is housed in the motor case 12. The electric compressor 10 further includes a compression unit 16, an electric motor 17, and an inverter device 30. The inverter device 30 has a circuit board 31.

The compression unit 16 compresses a refrigerant as a fluid by rotation of the rotary shaft 15. The compression portion 16 is driven by rotation of the rotary shaft 15. The compression portion 16 is housed in the motor case 12. The compression portion 16 is, for example, a scroll composed of a fixed scroll, not shown, fixed in the motor housing 12 and a movable scroll, not shown, disposed opposite to the fixed scroll.

The electric motor 17 rotates the rotary shaft 15 to drive the compression portion 16. The electric motor 17 is housed in the motor case 12. The compression portion 16 and the electric motor 17 are arranged in an axial direction, which is a direction in which the rotation axis of the rotary shaft 15 extends. The electric motor 17 is disposed closer to the end wall 12a of the motor case 12 than the compression portion 16. A motor chamber 18 for accommodating the electric motor 17 is formed between the compression portion 16 and the end wall 12a in the motor case 12.

The electric motor 17 includes a cylindrical stator 20 and a rotor 21 disposed inside the stator 20. The rotor 21 rotates integrally with the rotary shaft 15. The stator 20 encloses the rotor 21. The rotor 21 includes a rotor core 21a fixed to the rotary shaft 15, and a plurality of permanent magnets 21b provided to the rotor core 21 a. The stator 20 includes a cylindrical stator core 20a and a motor coil 20b wound around the stator core 20 a.

The peripheral wall 12b is formed with a suction port 12h. The suction port 12h is formed in a portion of the peripheral wall 12b on the end wall 12a side. The suction port 12h communicates with the motor chamber 18. An end of the external refrigerant circuit 25 is connected to the suction port 12h. A discharge port 13h is formed in the discharge housing 13. The other end of the external refrigerant circuit 25 is connected to the discharge port 13h.

The refrigerant sucked into the motor chamber 18 from the external refrigerant circuit 25 through the suction port 12h is compressed by the compression portion 16 by the driving of the compression portion 16, and flows out to the external refrigerant circuit 25 through the discharge port 13h. The refrigerant flowing out to the external refrigerant circuit 25 flows back into the motor chamber 18 through the suction port 12h via the heat exchanger and the expansion valve of the external refrigerant circuit 25. The motor-driven compressor 10 and the external refrigerant circuit 25 constitute a vehicle air conditioner 26.

The inverter case 14 has a plate-shaped end wall 14a and a peripheral wall 14b extending cylindrically from the outer peripheral portion of the end wall 14 a. The inverter case 14 is attached to the end wall 12a of the motor case 12 in a state where an opening on the opposite side of the end wall 14a in the peripheral wall 14b is closed by the end wall 12a of the motor case 12. The thickness direction of the end wall 14a of the inverter case 14 coincides with the axial direction of the rotary shaft 15.

The inverter chamber 32 is partitioned by the

end walls

14a and 14b of the inverter case 14 and the end wall 12a of the motor case 12. Accordingly, the housing 11 has the inverter chamber 32. The inverter device 30 is housed in the inverter chamber 32. The compression unit 16, the electric motor 17, and the inverter device 30 are arranged in this order in the axial direction of the rotary shaft 15.

(regarding the high-voltage connector connecting portion 40)

As shown in fig. 2 and 3, the motor-driven compressor 10 includes a high-voltage connector connection portion 40. The high-voltage connector connection portion 40 protrudes from the end wall 14a of the inverter case 14 to the outside of the inverter case 14. A high-voltage connector 42 of a high-voltage power source 41 is connected to the high-voltage connector connection portion 40. In addition, the high-voltage connector connection portion 40 has a bus bar 40a. The bus bar 40a electrically connects the high-voltage power source 41 and the circuit board 31.

(with respect to the low voltage connector connecting portion 50)

The motor-driven compressor 10 includes a low-voltage connector connection portion 50. The low-voltage connector connection portion 50 protrudes from the end wall 14a of the inverter case 14 to the outside of the inverter case 14. A low-voltage connector 52 of a low-voltage power supply 51 is connected to the low-voltage connector connection portion 50. In addition, the low-voltage connector connection portion 50 has a bus bar 50a. The bus bar 50a electrically connects the low-voltage power supply 51 and the circuit board 31.

(Structure of inverter device 30)

The circuit board 31 is accommodated in the inverter chamber 32. Accordingly, the inverter chamber 32 accommodates the circuit board 31. The circuit board 31 is housed in the inverter chamber 32 in a state where the thickness direction of the circuit board 31 coincides with the axial direction of the rotary shaft 15. The circuit substrate 31 extends along the end wall 14a of the inverter case 14.

A drive circuit 33 is mounted on the circuit board 31. The drive circuit 33 has a high-voltage circuit 34 for driving the electric motor 17, and a low-voltage circuit 35 for controlling the high-voltage circuit 34. The high-voltage circuit 34 includes, for example, a switching element that performs switching operation for driving the electric motor 17, a noise filter element that reduces noise, and the like. The low voltage circuit 35 includes, for example, a control circuit for controlling the switching operation of the switching element.

The drive circuit 33 is driven by electric power from the low-voltage power supply 51. The power from the low-voltage power supply 51 is supplied to the low-voltage circuit 35 via the bus bar 50a. The low voltage circuit 35 controls the switching operation of the switching element based on a control signal from the vehicle ECU74 as the host ECU. Thereby, the driving circuit 33 is driven based on the control signal from the low-voltage power supply 51.

In the inverter device 30, dc power supplied from the high-voltage power source 41 to the high-voltage circuit 34 via the bus bar 40a is converted into ac power by switching operation of the switching element. Then, the electric motor 17 is driven by supplying ac power to the electric motor 17. Accordingly, the inverter device 30 converts the dc power from the high-voltage power source 41 into ac power by driving the driving circuit 33 and supplies the ac power to the electric motor 17, thereby driving the electric motor 17.

(first detection wiring 61 and second detection wiring 62)

The high-voltage connector connection portion 40 has a first detection wiring 61 and a second detection wiring 62. The first detection wire 61 can be connected to one end of the detection conductor 70 provided in the high-voltage connector 42. The second detection wire 62 can be connected to the other end of the detection conductor 70. The first detection wiring 61 and the second detection wiring 62 extend from the high-voltage connector connection portion 40 into the inverter chamber 32. The first detection wire 61 and the second detection wire 62 are wire harnesses. The first detection wiring 61 and the second detection wiring 62 extending from the high-voltage connector connection portion 40 into the inverter chamber 32 are electrically connected to the connection terminal 65.

(third detection wiring 63 and fourth detection wiring 64)

The low-voltage connector connection portion 50 has a third detection wiring 63 and a fourth detection wiring 64. The third detection wiring 63 can be connected to the first detection connection conductor 71 provided in the low-voltage connector 52. The fourth detection wiring 64 can be connected to the second detection connection conductor 72 provided in the low-voltage connector 52. The third detection wiring 63 and the fourth detection wiring 64 are leads protruding from the low-voltage connector connection portion 50 into the inverter chamber 32. The first and second detecting

connection conductors

71 and 72 are electrically connected to a detection circuit 73 provided outside the motor-driven compressor 10. The detection circuit 73 is electrically connected to the vehicle ECU 74.

(Structure of connector 80)

A connector 80 for electrically connecting the first detection wiring 61 and the second detection wiring 62 extending from the high-voltage connector connection portion 40 into the inverter chamber 32 to the detection circuit 73 is disposed in the inverter chamber 32. The connector 80 has a connector housing 81 and terminals 82. The connector housing 81 is made of resin. The terminals 82 are accommodated in the connector housing 81. The terminals 82 are electrically connected to the third detection wiring 63 and the fourth detection wiring 64, respectively, at the positions protruding from the low-voltage connector connection portion 50 into the inverter chamber 32.

The connector housing 81 has a connection port 81a to which the connection terminal 65 is connected. The terminal 82 faces the connection port 81a. The connector 80 is disposed in the inverter chamber 32 with the connection port 81a facing in a direction orthogonal to the thickness direction of the circuit board 31. The connection terminal 65 is connected to the connection port 81a from a direction perpendicular to the thickness direction of the circuit board 31. Thus, the first detection wiring 61 and the second detection wiring 62 are electrically connected to the terminal 82 of the connector 80 via the connection terminal 65. Therefore, the first detection wiring 61 and the second detection wiring 62 are connected to the connector 80 from a direction orthogonal to the thickness direction of the circuit board 31.

The connector 80 connects the first detection wiring 61 and the third detection wiring 63, and connects the second detection wiring 62 and the fourth detection wiring 64. The detection conductors 70, the first detection wiring 61, the second detection wiring 62, the third detection wiring 63, the fourth detection wiring 64, the first detection connection conductor 71, and the second detection connection conductor 72 form a closed-loop circuit together with the detection circuit 73. Therefore, the first detection wiring 61, the detection conductor 70, and the second detection wiring 62 are in a conductive state of the series circuit when the high-voltage connector connection portion 40 is connected to the high-voltage connector 42, and form a closed loop circuit together with the detection circuit 73.

(relation between the connector 80 and the circuit board 31)

The connector 80 and the circuit board 31 are disposed in the inverter chamber 32 in a state of overlapping in the thickness direction of the circuit board 31. Specifically, the connector 80 is disposed in the inverter chamber 32 in a state of overlapping with a portion of the circuit board 31 where the low-voltage circuit 35 is mounted in the thickness direction of the circuit board 31. The high-voltage circuit 34 is disposed at a position distant from the connector 80 as compared with the low-voltage circuit 35. A part of the connector 80 overlaps the circuit board 31.

(action)

Next, the operation of the present embodiment will be described.

The detection circuit 73 detects the connection state of the high-voltage connector connection portion 40 with the high-voltage connector 42. When the series circuit of the first detection wiring 61, the detection conductor 70, and the second detection wiring 62 is non-conductive, the detection circuit 73 transmits a disconnection detection signal indicating that the high-voltage connector connection unit 40 and the high-voltage connector 42 are disconnected to the vehicle ECU 74. When receiving the disconnection detection signal from the detection circuit 73, the vehicle ECU74 turns on, for example, a warning lamp to warn a user who is a passenger such as a driver that the high-voltage connector connection unit 40 and the high-voltage connector 42 are in a disconnected state.

(Effect)

In the above embodiment, the following effects can be obtained.

(1) The first detection wiring 61 and the second detection wiring 62 are connected to the connector 80 from a direction orthogonal to the thickness direction of the circuit board 31. Therefore, the connector 80 and the circuit board 31 can be disposed in the inverter chamber 32 in a state of being overlapped in the thickness direction of the circuit board 31. Therefore, for example, the space in the inverter chamber 32 can be saved as compared with a case where the connector 80 and the circuit board 31 are disposed in the inverter chamber 32 in a state of not overlapping in the thickness direction of the circuit board 31. As a result, the motor-driven compressor 10 can be miniaturized.

(2) The detection conductors 70, the first detection wiring 61, the second detection wiring 62, the third detection wiring 63, the fourth detection wiring 64, the first detection connection conductor 71, and the second detection connection conductor 72 form a closed loop circuit together with the detection circuit 73. Therefore, when a closed-loop circuit is formed together with the detection circuit 73, for example, a pattern via the circuit substrate 31 is not required. Thus, the circuit board 31 is not increased in size due to the formation of the pattern for the closed-loop circuit. Therefore, for example, unnecessary enlargement of the circuit board 31 is suppressed, and the space in the inverter chamber 32 can be saved. As a result, the motor-driven compressor 10 can be further miniaturized.

(3) The connector 80 is disposed in the inverter chamber 32 in a state of overlapping with a portion of the circuit board 31 where the low-voltage circuit 35 is mounted in the thickness direction of the circuit board 31. Thus, for example, the insulation distance between the connector 80 and the circuit board 31 can be shortened as compared with a case where the connector 80 and the portion of the circuit board 31 where the high-voltage circuit 34 is mounted overlap in the thickness direction of the circuit board 31. Therefore, the connector 80 can be brought close to the circuit board 31 as much as possible, and thus the space in the inverter chamber 32 can be saved. As a result, the motor-driven compressor 10 can be further miniaturized.

(modification)

The above-described embodiment can be modified as follows. The above-described embodiments and the following modifications can be combined and implemented within a range that is not technically contradictory.

In the embodiment, when a closed-loop circuit is formed together with the detection circuit 73, for example, a structure may be adopted in which a pattern is passed through the circuit board 31.

In the embodiment, the detection circuit 73 may be mounted on the circuit board 31. In this case, the pattern of the detection conductor 70, the first detection wiring 61, the second detection wiring 62, and the circuit board 31 forms a closed-loop circuit together with the detection circuit 73. Therefore, the third detection wiring 63, the fourth detection wiring 64, the first detection connection conductor 71, and the second detection connection conductor 72 can be omitted. For example, the series circuit including the first detection wiring 61, the detection conductor 70, and the second detection wiring 62 is made non-conductive. Thus, the detection circuit 73 transmits a disconnection detection signal indicating that the high-voltage connector connection unit 40 and the high-voltage connector 42 are disconnected to the microcomputer mounted on the circuit board 31. Then, the microcomputer communicates with the vehicle ECU74, and transmits a disengagement detection signal to the vehicle ECU 74.

In the embodiment, the entire connector 80 may be overlapped with the circuit board 31. Since the first detection wiring 61 and the second detection wiring 62 are connected to the connector 80 from a direction orthogonal to the thickness direction of the circuit board 31, the entire connector 80 can be arranged so as to overlap the circuit board 31. Therefore, the size of the circuit board 31 can be increased regardless of the arrangement position of the connector 80.

In the embodiment, the connector 80 may overlap with a portion of the circuit board 31 where the high-voltage circuit 34 is mounted in the thickness direction of the circuit board 31. In this case, it is necessary to sufficiently secure the insulation distance between the connector 80 and the circuit board 31.

In the embodiment, the first detection wiring 61 and the second detection wiring 62 may be connected to the connector 80 from a direction inclined with respect to the thickness direction of the circuit board 31. In this case, the connector 80 is disposed in the inverter chamber 32 with the connection port 81a oriented in a direction inclined with respect to the thickness direction of the circuit board 31. In short, the first detection wiring 61 and the second detection wiring 62 may be connected to the connector 80 from a direction intersecting the thickness direction of the circuit board 31.

In the embodiment, the electric compressor 10 may be configured such that the inverter device 30 is disposed radially outward of the rotary shaft 15 with respect to the housing 11, for example. In short, the compression unit 16, the electric motor 17, and the inverter device 30 may be arranged in the axial direction of the rotary shaft 15, not in this order.

In the embodiment, the compression unit 16 is not limited to the scroll type, and may be, for example, a piston type, a vane type, or the like.

In the embodiment, the motor-driven compressor 10 constitutes the vehicle air conditioner 26, but is not limited thereto. The electric compressor 10 may be mounted on a fuel cell vehicle, for example, and compresses air, which is a fluid supplied to the fuel cell, by the compression unit 16.

Claims

1. An electric compressor is provided with:

a compression unit that compresses a fluid;

an electric motor that drives the compression unit;

an inverter device having a circuit board on which a drive circuit driven by electric power from a low-voltage power supply is mounted, and which converts direct-current electric power from a high-voltage power supply into alternating-current electric power by driving of the drive circuit and supplies the alternating-current electric power to the electric motor, thereby driving the electric motor;

a housing having an inverter chamber for accommodating the circuit board; and

a high-voltage connector connection part for connecting a high-voltage connector of the high-voltage power supply,

the high-voltage connector connection portion has:

a first detection wiring connectable to one end of a detection conductor provided in the high-voltage connector; and

a second detection wiring connectable to the other end of the detection conductor,

the first detecting wiring, the detecting conductor, and the second detecting wiring are in a conductive state of a series circuit when the high-voltage connector connecting portion is connected to the high-voltage connector, and form a closed loop circuit together with a detecting circuit that detects a connection state of the high-voltage connector connecting portion to the high-voltage connector,

a connector for electrically connecting the first detection wiring and the second detection wiring extending from the high-voltage connector connection portion into the inverter chamber to the detection circuit is disposed in the inverter chamber,

the electric compressor is characterized in that,

the connector and the circuit board are disposed in the inverter chamber in a state of overlapping in a thickness direction of the circuit board,

the first detection wiring and the second detection wiring are connected to the connector from a direction intersecting a thickness direction of the circuit board.

2. The motor-driven compressor according to claim 1, wherein,

the motor-driven compressor is provided with a low-voltage connector connecting part for connecting a low-voltage connector of the low-voltage power supply,

the low voltage connector connection portion has:

a third detection wiring connectable to a first detection connection conductor provided in the low-voltage connector and electrically connected to the detection circuit; and

a fourth detection wiring connectable to a second detection connection conductor provided in the low-voltage connector and electrically connected to the detection circuit,

the connector connects the first detection wiring to the third detection wiring, and connects the second detection wiring to the fourth detection wiring.

3. An electric compressor according to claim 1 or 2, characterized in that,

the driving circuit has:

a high voltage circuit for driving the electric motor; and

a low voltage circuit controlling the high voltage circuit,

the connector is disposed in the inverter chamber in a state of overlapping with a portion of the circuit board on which the low-voltage circuit is mounted in a thickness direction of the circuit board.