Inverter-integrated electric compressor

• US 9,722,474 B2
• Filed: 12/25/2013
• Issued: 08/01/2017
• Est. Priority Date: 02/21/2013
• Status: Active Grant

• Current Assignee: Mitsubishi Heavy Industries Thermal Systems, Ltd. (Mitsubishi Heavy Industries, Ltd.)
• Original Assignee: Mitsubishi Heavy Industries Automotive Thermal Systems Co., Ltd.
• Inventors: Hattori, Makoto, Asai, Masahiko
• Primary Examiner(s): Mok, Alex W
• Application Number:
  US14/654,995
• Publication Number:
  US 20150349613A1
• Time in Patent Office: 1,315 Days
• Field of Search: 310 71
• CPC Class Codes: F04B 35/04 the means being electric
• CPC Class Codes: F04B 39/121 Casings
• CPC Class Codes: F04C 2240/808 Electronic circuits (e.g. inverters) installed inside the machine
• CPC Class Codes: H02K 11/33 Drive circuits, e.g. power electronics H02K11/38 takes precedence
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections

Abstract

The purpose of the present invention is to provide an inverter-integrated electric compressor which, even with the connector of a power source-side cable configured to be connected directly to a P-N terminal on a circuit board, reduces the stress on the circuit board by support by a high voltage electric component and can implement this support with high precision. This inverter-integrated electric compressor is configured such that a P-N terminal for inputting high-voltage DC power is provided on a main circuit board, a power source-side cable can be connected to said P-N terminal by inserting a connector provided on one end, a high-voltage electric component configuring the inverter device is arranged in the facing position on the side of the main circuit board opposite that of the P-N terminal, and the electric component is housed in a case and fixed by a resin member; and is further configured such that multiple protruding and receding portions are formed on the edge of the top opening of the case, and stress on the main circuit board when the connector is plugged in is received by the protruding portions abutting against the bottom surface of the main circuit board.

Claims

1. An inverter-integrated electric compressor having an integrated inverter device incorporated in an inverter housing section provided on an outer circumference of a housing, the compressor comprising:

a P-N terminal configured to input high-voltage direct-current power provided on a main circuit board of an inverter device, a power source cable being able to be connected by inserting a connector provided at one end of the power source cable into the P-N terminal; and

a high-voltage electrical component constituting the inverter device provided at a position across from the P-N terminal on the opposite side of the main circuit board,

the electrical component being housed within a case and anchored in place by a resin material, a plurality of raised and recessed sections being provided on a circumferential edge of an opening in an upper end of the case, and the raised sections being brought into contact with an undersurface of the main circuit board so as to bear stress placed upon the main circuit board when the connector is inserted.

2. The inverter-integrated electric compressor according to claim 1, wherein the electrical component is a smoothing capacitor constituting a noise-removing filter circuit provided on a high-voltage direct-current power line of the inverter device.

3. The inverter-integrated electric compressor according to claim 1, wherein the electrical component is a coil constituting a noise-removing filter circuit provided on a high-voltage direct-current power line of the inverter device.

4. The inverter-integrated electric compressor according to claim 1, wherein the case housing the electrical component has a rectangular shape as seen in plan view, and the plurality of raised and recessed sections provided on the circumferential edge of the opening in the upper end of the case is provided in alternation and so that at least one raised section is present on each side of the opening.

5. The inverter-integrated electric compressors according to claim 1, wherein the connector provided at the one end of the power source cable is provided at a position corresponding to that of the P-N terminal on the side of a lid for closing off the inverter housing section, and the connector can be inserted into the P-N terminal when the lid is mounted in place.