Inverter-integrated electric compressor

• US 9,318,935 B2
• Filed: 10/20/2011
• Issued: 04/19/2016
• Est. Priority Date: 10/27/2010
• Status: Active Grant

• Current Assignee: Mitsubishi Heavy Industries, Ltd.
• Original Assignee: Mitsubishi Heavy Industries, Ltd.
• Inventors: Nakagami, Takashi, Nakano, Koji, Kamitani, Hiroyuki, Takashige, Takayuki
• Primary Examiner(s): Le, Dang
• Application Number:
  US13/699,905
• Publication Number:
  US 20130119834A1
• Time in Patent Office: 1,643 Days
• Field of Search: 310/64, 310/89, 310/68.D
• US Class Current: 1/1
• CPC Class Codes: F04B 39/121 Casings
• CPC Class Codes: F04B 53/08 Cooling; Heating; Preventing freezing
• CPC Class Codes: F04C 18/0215 where only one member is moving
• CPC Class Codes: F04C 2240/808 Electronic circuits (e.g. inverters) installed inside the machine
• CPC Class Codes: F04C 23/008 Hermetic pumps
• CPC Class Codes: F04C 29/047 Cooling of electronic devices installed inside the pump housing, e.g. inverters
• CPC Class Codes: H02K 11/05 Rectifiers associated with casings, enclosures or brackets
• CPC Class Codes: H02K 11/33 Drive circuits, e.g. power electronics H02K11/38 takes precedence
• CPC Class Codes: H02K 5/22 Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
• CPC Class Codes: H02K 9/223 Heat bridges

Abstract

A control circuit board (25) configuring an inverter (21) serves as a thermally-conductive substrate. One surface of the control circuit board (25) is installed in a heat transferable manner on a heat-dissipating planar part (31) disposed on a housing (2), while heat-producing electrical components (39) are disposed in a heat transferable manner on the other surface of the control circuit board (25). The control circuit board (25) includes a substrate body (41) constituted of an insulator, and heat-conducting through members (42) constituted of a good thermal conductor filled through in a thickness direction of the substrate body (41). One end of each of the heat-conducting through members (42) is disposed in a heat transferable manner on the heat-dissipating planar part (31), and the electrical component (39) is disposed in a heat transferable manner on the other end.

Claims

1. An inverter-integrated electric compressor, comprising

an inverter box provided on an outer surface of a housing that contains a compressor for a refrigerant and an electric motor that drives the compressor,

an inverter that has a control circuit board and is housed and installed in the inverter box, and

a heat-producing electrical component that is loaded on the control circuit board and constitutes the inverter,

a heat-dissipating planar part that constitutes an outer wall of the housing being formed inside the inverter box, and

heat of the electrical component being cooled by being dissipated to the heat-dissipating planar part side,

wherein the control circuit board serves as a thermally-conductive substrate,

the thermally-conductive substrate includes a substrate body made of an insulator, and a heat-conducting through member made of a good thermal conductor and filled through in a thickness direction of the substrate body,

the heat-conducting through member is located on the thermally-conductive substrate to conform to a loading position of the electrical component, and

in the heat-conducting through member, one end surface thereof is disposed in a heat transferable manner on the heat-dissipating planar part, and the electrical component is disposed in a heat transferable manner on the other end surface.

2. The inverter-integrated electric compressor according to claim 1,

wherein a thickness of the heat-conducting through member is set to be slightly larger than a thickness of the substrate body, and out of the end surfaces of the heat-conducting through member, at least the end surface which is in contact with the heat-dissipating planar part is slightly projected from a surface of the substrate body.

3. The inverter-integrated electric compressor according to claim 1,

wherein the electrical component is of a surface mount type which is directly mounted on a surface of the control circuit board.

4. The inverter-integrated electric compressor according to claim 1,

wherein the control circuit board is a multilayered board.

5. The inverter-integrated electric compressor according to claim 1,

wherein the inverter box is provided on an end surface of the housing.

6. The inverter-integrated electric compressor according to claim 1,

wherein the electrical component that is mounted on the control circuit board is a switching element.

7. The inverter-integrated electric compressor according to claim 1,

wherein the electrical component that is mounted on the control circuit board is a noise suppressing member.