Electric compressor

Abstract

To provide a motor-driven compressor that can improve the degree of freedom in design of an invertor.SOLUTION: A motor-driven compressor 10 comprises a compressor unit 30, an electric motor 40, an inverter 50, a housing 20, a power line connector 60, a communication line connector 70, and interlocking communication lines 90. The power line connector 60 and the communication line connector 70 are provided on an exposed surface 21d that serves as the external surface of the housing 20. The interlocking communication lines 90 are routed over the power line connector 60 and the communication line connector 70. A first terminal 91 of the interlocking communication line 90 is located in the power line connector 60. A second terminal 92 of the interlocking communication line 90 is located in the communication line connector 70. The interlocking communication line 90 is routed on the exposed surface 21d from the first terminal 91 to the second terminal 92.SELECTED DRAWING: Figure 1

Description

Technical Field

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

Background Art

[0002] An electric compressor includes a compression part, an electric motor, an inverter, and a housing. The compression part compresses a fluid. The electric motor drives the compression part. The inverter drives the electric motor. The housing houses the compression part, the electric motor, and the inverter. The housing has an inverter housing part that houses the inverter and a lid body that closes an opening of the inverter housing part.

[0003] For example, the electric compressor described in Patent Document 1 includes a power line connector and a communication line connector. The power line connector and the communication line connector are provided on the lid body. The power line connector and the communication line connector are electrically connected to the inverter. An interlock communication line is provided in the communication line connector. The interlock communication line is, for example, a communication line used to confirm the connection of the power line connector. The interlock communication line is usually arranged on a substrate constituting the inverter.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, when changing the arrangement of the interlock communication line according to the requirements of the user of the electric compressor, it is also necessary to change the design of the inverter that is electrically connected to the interlock communication line. Therefore, since it is necessary to consider the arrangement of the interlock communication line, there is a risk that the degree of freedom in the design of the inverter will decrease.

Means for Solving the Problem

[0006] The electric compressor for solving the above problems includes a compression part that compresses a fluid, an electric motor that drives the compression part, an inverter that drives the electric motor, a housing that houses the compression part, the electric motor, and the inverter, a power line connector that is provided on the housing and is connected to a vehicle-side first connector to supply power to the inverter, a communication line connector that is provided on the housing and is connected to a vehicle-side second connector to input a control signal for driving the compression part to the inverter, and an interlock communication line that is laid across the power line connector and the communication line connector and is connected to a vehicle-side interlock wiring when the power line connector is connected to the vehicle-side first connector and the communication line connector is connected to the vehicle-side second connector. The power line connector and the communication line connector are provided on the outer surface of the housing. A first terminal that is one end of the interlock communication line is located at the power line connector, a second terminal that is the other end of the interlock communication line is located at the communication line connector, and the interlock communication line is laid on the outer surface from the first terminal to the second terminal.

[0007] According to the above configuration, when changing the arrangement of the interlock communication line according to the requirements of the user of the electric compressor, it is not necessary to change the design of the inverter. That is, the degree of freedom in the design of the inverter can be improved compared to the case where the interlock communication line is laid on the substrate constituting the inverter.

[0008] In the above electric compressor, it is preferable to include a connecting part that integrally connects the power line connector and the communication line connector, and the interlock communication line is arranged inside the connecting part and is connected to the power line connector and the communication line connector.

[0009] According to the above configuration, the arrangement of the power line connector and the communication line connector can be completed simultaneously with the laying of the communication line for interlock. Therefore, the manufacturing process of the electric compressor can be reduced.

[0010] In the above electric compressor, the housing has a housing recess for accommodating the inverter and an inverter cover for closing the housing recess, and the outer surface is preferably the outer surface of the inverter cover.

[0011] According to the above configuration, the communication line for interlock can be laid with the inverter cover removed from the electric compressor. Therefore, the laying of the communication line for interlock can be easily carried out.

Effects of the Invention

[0012] According to this invention, the degree of freedom in the design of the inverter can be improved.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Modes for Carrying Out the Invention

[0014] Hereinafter, embodiments in which an electric compressor is embodied will be described with reference to FIGS. 1 and 2. The electric compressor of the present embodiment is used, for example, in a vehicle air conditioner. <Electric Compressor> As shown in FIG. 1, the electric compressor 10 includes a housing 20, a compression unit 30, an electric motor 40, and an inverter 50. The housing 20 is cylindrical. The housing 20 is made of metal. The housing 20 is made of, for example, aluminum. Note that the housing 20 is composed of a plurality of housing components that can be divided in the axial direction.

[0015] The compression section 30 compresses the refrigerant as a fluid. The electric motor 40 drives the compression section 30. The inverter 50 drives the electric motor 40. The housing 20 houses the compression section 30, the electric motor 40, and the inverter 50. The compression section 30, the electric motor 40, and the inverter 50 are arranged in this order in the axial direction of the housing 20.

[0016] The electric motor 40 is driven by being supplied with power from the inverter 50. The compression section 30 is of a scroll type composed of a fixed scroll and a movable scroll (not shown). The compression section 30 compresses the refrigerant sucked into the housing 20 as the electric motor 40 is driven.

[0017] The housing 20 has an inverter housing section 21. The inverter housing section 21 has a housing recess 21a that houses the inverter 50. That is, the housing 20 has a housing recess 21a that houses the inverter 50. In the present embodiment, the housing recess 21a has an opening 21c that opens toward the outside in the axial direction of the housing 20. The inverter housing section 21 has an inverter cover 21b. The inverter cover 21b closes the opening 21c. That is, the housing 20 has an inverter cover 21b that closes the housing recess 21a. The inverter cover 21b has an exposed surface 21d. The exposed surface 21d is a surface located on the side opposite to the housing recess 21a in the inverter cover 21b. The exposed surface 21d is a surface that is exposed to the outside in the inverter cover 21b. That is, the exposed surface 21d is the outer surface of the inverter cover 21b. The inverter housing section 21 has an exposed surface 21d that is exposed to the outside. That is, the exposed surface 21d is the outer surface of the housing 20.

[0018] <Power line connector, communication line connector, connecting section, interlock communication line> The electric compressor 10 includes a power line connector 60, a communication line connector 70, a connecting section 80, and an interlock communication line 90.

[0019] The power line connector 60 and the communication line connector 70 are provided in the inverter accommodation part 21. That is, the power line connector 60 and the communication line connector 70 are provided in the housing 20. The power line connector 60 and the communication line connector 70 are provided on the exposed surface 21d. That is, the power line connector 60 and the communication line connector 70 are provided on the outer surface of the housing 20.

[0020] The power line connector 60 has a first power terminal 61 and a first housing 62. The first housing 62 is formed of a resin member. The first housing 62 is provided on the exposed surface 21d. A part of the first housing 62 penetrates the inverter cover 21b. The first housing 62 is a bottomed cylindrical shape. A first connection port 62a is provided in the first housing 62. The first power terminal 61 penetrates the inverter cover 21b and the bottom of the first housing 62. The first power terminal 61 is electrically connected to the inverter 50. The first end of the first power terminal 61 is electrically connected to a switching element, a capacitor, etc. (not shown) of the inverter 50. The second end of the first power terminal 61 is located inside the first connection port 62a. In FIG. 1, for convenience of explanation, the first power terminal 61 is described as one, but actually it has a positive terminal and a negative terminal.

[0021] The communication line connector 70 has a second power terminal 72, a control terminal 73, and a second housing 74. The second housing 74 is formed of a resin member. The second housing 74 is provided on the exposed surface 21d. A part of the second housing 74 penetrates the inverter cover 21b. The second housing 74 is a bottomed cylindrical shape. The second housing 74 is provided with a second connection port 74a. The second power terminal 72 and the control terminal 73 penetrate the inverter cover 21b and the bottom of the second housing 74. The second power terminal 72 and the control terminal 73 are electrically connected to the inverter 50. The first end of each of the second power terminal 72 and the control terminal 73 is electrically connected to a control unit including a CPU that the inverter 50 has. The second end of each of the second power terminal 72 and the control terminal 73 is located inside the second connection port 74a. In FIG. 1, for convenience of explanation, the second power terminal 72 is shown as one, but actually it has a positive terminal and a negative terminal. That is, the second power terminal 72 is a terminal for applying power to operate the control unit of the inverter 50. Also, for convenience of explanation, the control terminal 73 is shown as one, but actually there are a plurality of them. The control terminal 73 only needs to exist in the number of control signals input to the control unit of the inverter 50. A control signal for driving the compression unit 30 is conducted to the control terminal 73.

[0022] As shown in FIGS. 1 and 2, the connecting portion 80 connects the first housing 62 of the power line connector 60 and the second housing 74 of the communication line connector 70. The connecting portion 80 is integrally formed with each of the housings 62, 74. That is, the connecting portion 80 integrally connects the power line connector 60 and the communication line connector 70. The connecting portion 80 is formed of a resin member. The connecting portion 80 is provided along the exposed surface 21d.

[0023] The communication line 90 for interlock is, for example, a plate-shaped bus bar. The communication line 90 for interlock is routed across the power line connector 60 and the communication line connector 70. Specifically, the first terminal 91, which is one end of the communication line 90 for interlock, is disposed inside the first connection port 62a of the first housing 62. That is, the first terminal 91 of the communication line 90 for interlock is located at the power line connector 60. The second terminal 92, which is the other end of the communication line 90 for interlock, is disposed inside the second connection port 74a of the second housing 74. That is, the second terminal 92 of the communication line 90 for interlock is located at the communication line connector 70. The communication line 90 for interlock is disposed across the inside of the first housing 62, the inside of the connecting portion 80, and the inside of the second housing 74. The communication line 90 for interlock is covered with a resin member except for the portions located inside the first connection port 62a and the second connection port 74a. The portion of the communication line 90 for interlock passing through the inside of the connecting portion 80 extends along the exposed surface 21d. For this reason, the communication line 90 for interlock is routed to the exposed surface 21d side without passing through the inverter cover 21b. That is, the communication line 90 for interlock is routed on the outer surface of the housing 20 from the first terminal 91 to the second terminal 92. The communication line 90 for interlock is integrally formed with the power line connector 60 and the communication line connector 70. Also, the communication line 90 for interlock is not routed on the substrate constituting the inverter 50. Note that, for convenience of explanation, the first power terminal 61, the second power terminal 72, and the control terminal 73 are not shown in FIG. 2.

[0024] <Relationship between the electric compressor and the vehicle> The electric compressor 10 of the present embodiment is applied to a vehicle air conditioner. The electric compressor 10 is mounted on a vehicle 100. The vehicle 100 includes a first battery 101, a second battery 102, a vehicle control device 103, a vehicle-side first connector 104, and a vehicle-side second connector 105. The vehicle 100 includes a first power line L1, a second power line L2, a normal communication line L3, a first vehicle-side interlock wiring L4, and a second vehicle-side interlock wiring L5. Note that the voltage of the first battery 101 is higher than the voltage of the second battery 102. Also, the first vehicle-side interlock wiring L4 and the second vehicle-side interlock wiring L5 are the vehicle-side interlock wirings in the claims.

[0025] The first power line L1 electrically connects the first battery 101 and the vehicle-side first connector 104. The second power line L2 electrically connects the second battery 102 and the vehicle-side second connector 105. The normal communication line L3 electrically connects the vehicle control device 103 and the vehicle-side second connector 105.

[0026] The vehicle-side first connector 104 is connected to the first connection port 62a of the power line connector 60. The power stored in the first battery 101 is supplied to the inverter 50 via the first power line L1, the vehicle-side first connector 104, and the first power terminal 61 of the power line connector 60. That is, power is supplied to the inverter 50 when the power line connector 60 is connected to the vehicle-side first connector 104.

[0027] The vehicle-side second connector 105 is connected to the second connection port 74a of the communication line connector 70. The power stored in the second battery 102 is supplied to the inverter 50 via the second power line L2, the vehicle-side second connector 105, and the second power terminal 72 of the communication line connector 70. That is, power is supplied to the inverter 50 when the communication line connector 70 is connected to the vehicle-side second connector 105.

[0028] The vehicle control device 103 outputs a control signal for controlling the drive of the electric compressor 10. The control signal output from the vehicle control device 103 is supplied to the inverter 50 via the normal communication line L3, the vehicle-side second connector 105, and the control terminal 73 of the communication line connector 70. That is, when the communication line connector 70 is connected to the vehicle-side second connector 105, a control signal for driving the compression unit 30 is input to the inverter 50.

[0029] The first end of the first vehicle-side interlock wiring L4 is electrically connected to the first terminal 91 of each interlock communication line 90 via the vehicle-side first connector 104. The second end of the first vehicle-side interlock wiring L4 is electrically connected to the vehicle control device 103.

[0030] The first end of the second vehicle-side interlock wiring L5 is electrically connected to the second terminal 92 of each interlock communication line 90 via the vehicle-side second connector 105. The second end of the second vehicle-side interlock wiring L5 is electrically connected to the vehicle control device 103. That is, when the power line connector 60 is connected to the vehicle-side first connector 104 and the communication line connector 70 is connected to the vehicle-side second connector 105, the interlock communication line 90 is connected to the vehicle-side interlock wiring.

[0031] Assume a case where the vehicle-side first connector 104 is connected to the power line connector 60 and the vehicle-side second connector 105 is connected to the communication line connector 70. In this case, the electrical signal output by the vehicle control device 103 is input to the interlock communication line 90 via either the first vehicle-side interlock wiring L4 or the second vehicle-side interlock wiring L5. The electrical signal returns to the vehicle control device 103 via either the other of the first vehicle-side interlock wiring L4 and the second vehicle-side interlock wiring L5. The vehicle control device 103 determines that the vehicle-side first connector 104 and the vehicle-side second connector 105 are properly connected to the electric compressor 10 when the electrical signal output to either the first vehicle-side interlock wiring L4 or the second vehicle-side interlock wiring L5 returns.

[0032] Assume a case where the vehicle-side first connector 104 is not connected to the power line connector 60, or the vehicle-side second connector 105 is not connected to the communication line connector 70. In this case, even if the vehicle control device 103 outputs an electronic signal to either the first vehicle-side interlock wiring L4 or the second vehicle-side interlock wiring L5, the electrical signal does not return to the vehicle control device 103. At this time, the vehicle control device 103 determines that the vehicle-side first connector 104 or the vehicle-side second connector 105 is not properly connected to the electric compressor 10.

[0033] That is, in the present embodiment, the interlock communication line 90 of the electric compressor 10 is used for the vehicle control device 103 to determine whether the vehicle-side first connector 104 and the vehicle-side second connector 105 are connected to the electric compressor 10. When the vehicle control device 103 cannot confirm the connection of the vehicle-side first connector 104 and the vehicle-side second connector 105 to the electric compressor 10, for example, it activates an interlock function such as stopping the operation of the vehicle air conditioner.

[0034] [Operations and Effects of the Present Embodiment] The operations and effects of the present embodiment will be described. (1) The interlock communication line 90 is arranged on the exposed surface 21d side of the inverter cover 21b. Therefore, when changing the arrangement of the interlock communication line 90 according to the user's request of the electric compressor 10, it is not necessary to arrange the interlock communication line 90 on the substrate of the inverter 50, so it is not necessary to change the design of the inverter 50. That is, the degree of freedom in the design of the inverter can be improved compared to the case where the interlock communication line 90 is arranged on the substrate constituting the inverter 50.

[0035] (2) The electric compressor 10 is provided with a connecting portion 80 that integrally connects the power line connector 60 and the communication line connector 70. And the interlock communication line 90 is disposed inside the connecting portion 80 and is connected to the power line connector 60 and the communication line connector 70. Therefore, the laying of the interlock communication line 90 can be completed simultaneously with the arrangement of the power line connector 60 and the communication line connector 70. Thus, the manufacturing process of the electric compressor 10 can be reduced.

[0036] (3) The interlock communication line 90 is laid along the exposed surface 21d of the inverter cover 21b. Therefore, the interlock communication line 90 can be laid with the inverter cover 21b removed from the electric compressor 10. Thus, the laying of the interlock communication line 90 can be easily carried out.

[0037] (4) The interlock communication line 90 is not laid on the substrate of the inverter 50. Therefore, it is not necessary to consider the laying of the interlock communication line 90 when designing the inverter 50. Thus, it is possible to prevent the progress of the design of the inverter 50 from being delayed due to the requirements of the user of the electric compressor 10.

[0038] [Modified Example] Note that the above embodiment can be modified as follows. The above embodiment and the following modified examples can be implemented in combination with each other within a technically non - conflicting range.

[0039] ○ According to the present embodiment, the power line connector 60 and the communication line connector 70 are provided on the exposed surface 21d of the inverter cover 21b, but it is not limited to this. For example, the power line connector 60 and the communication line connector 70 may be provided on the surface of the peripheral wall forming the housing recess 21a of the inverter housing portion 21 that is exposed to the outside. In this case, the interlock communication line 90 is laid on the surface of the peripheral wall forming the housing recess 21a of the inverter housing portion 21 that is exposed to the outside. That is, the surface of the peripheral wall forming the housing recess 21a of the inverter housing portion 21 that is exposed to the outside may be used as the outer surface of the housing 20.

[0040] ○ In the present embodiment, the inverter housing portion 21 may be formed such that the opening 21c of the housing recess 21a opens in a direction orthogonal to the axis of the housing 20. ○ In the present embodiment, the connecting portion 80 may be omitted. In this case, the portion between the power line connector 60 and the communication line connector 70 in the interlock communication line 90 is slightly separated from the exposed surface 21d of the inverter cover 21b.

[0041] ○ In the present embodiment, the interlock communication line 90 is a plate-shaped bus bar, but it may be a flexible wiring. ○ In the present embodiment, the interlock function executed by the vehicle control device 103 when the connection of the vehicle-side first connector 104 and the vehicle-side second connector 105 to the electric compressor 10 cannot be confirmed may be changed as appropriate.

[0042] ○ In each of the above embodiments, the compression portion 30 is not limited to the scroll type, and may be, for example, a piston type, a vane type, or the like. ○ In each of the above embodiments, the electric compressor 10 may be mounted on a fuel cell vehicle and compress air as a fluid supplied to the fuel cell by the compression portion 30.

Description of Reference Numerals

[0043] 10... Electric compressor, 20... Housing, 21a... Housing recess, 21b... Inverter cover, 21d... Exposed surface as the outer surface of the housing, 30... Compression portion, 40... Electric motor, 50... Inverter, 60... Power line connector, 70... Communication line connector, 80... Connecting portion, 90... Interlock communication line, 91... First terminal of the interlock communication line, 92... Second terminal of the interlock communication line, 104... Vehicle-side first connector, 105... Vehicle-side second connector, L4... First vehicle-side interlock wiring as the vehicle-side interlock, L5... Second vehicle-side interlock wiring as the vehicle-side interlock wiring.

Claims

1. A compression unit that compresses a fluid, An electric motor that drives the compression unit, An inverter that drives the electric motor, A housing that houses the compression unit, the electric motor, and the inverter, A power line connector provided on the housing and connected to a vehicle-side first connector to supply power to the inverter, A communication line connector provided on the housing and connected to a vehicle-side second connector to input a control signal for driving the compression unit into the inverter, An interlock communication line that is routed across the power line connector and the communication line connector, and is connected to a vehicle-side interlock wiring when the power line connector is connected to the vehicle-side first connector and the communication line connector is connected to the vehicle-side second connector. An electric compressor comprising: The power line connector and the communication line connector are provided on an outer surface of the housing, The power line connector has a first connection port having a bottomed cylindrical first housing formed of a resin member, The communication line connector has a second connection port having a bottomed cylindrical second housing formed of a resin member, A first terminal, which is one end of the interlock communication line, is located inside the first connection port, A second terminal, which is the other end of the interlock communication line, is located inside the second connection port, The interlock communication line is integrally formed with the power line connector and the communication line connector, and is routed on the outer surface without being routed on a substrate constituting the inverter from the first terminal to the second terminal. An electric compressor characterized by that.

2. A connecting portion that integrally connects the power line connector and the communication line connector, The electric compressor according to claim 1, wherein the interlock communication line is disposed inside the connecting portion and is connected to the power line connector and the communication line connector.

3. The housing, A housing recess that houses the inverter, An inverter cover that closes the housing recess, and has, The electric compressor according to claim 1 or claim 2, wherein the outer surface is an outer surface of the inverter cover.

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