Electric compressor

Patent metadata

Field	Value
Publication number	US-11489402-B2
Application number	US-201916725274-A
Country	US
Kind code	B2
Filing date	Dec 23, 2019
Priority date	Dec 27, 2018
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

An electric compressor includes a motor housing, an inverter, a cover, and a fastener. The inverter includes a board; an electronic component; a holder composed of an insulating material, the holder containing the electronic component and supporting the board; a bus bar integrated with the holder, and electrically connected to a circuit pattern and the motor housing; and a tubular member interposed between the cover and the bus bar, with the fastener inserted in the tubular member. The fastening force from the fastener causes the tubular member to press the bus bar toward the motor housing.

First claim

What is claimed is:

1. An electric compressor comprising:
a motor housing composed of an electrically conductive material and containing a motor that drives a compression mechanism;
an inverter that supplies power to the motor;
a cover defining, together with the motor housing, a space in which the inverter is contained; and
a fastener fixing the cover to the motor housing,
the inverter including
a board having a circuit pattern thereon,
an electronic component mounted on the board,
a holder composed of an insulating material, the holder containing the electronic component and supporting the board,
a bus bar integrated with the holder, and electrically connected to the circuit pattern and the motor housing, and
a tubular member interposed between the cover and the bus bar, with the fastener inserted in the tubular member, wherein

a fastening force from the fastener causes the tubular member to press the bus bar toward the motor housing.

2. The electric compressor according to claim 1 , wherein
the bus bar includes
a connected portion connected to the circuit pattern with solder, and
a pressed portion disposed between the tubular member and the motor housing, so that the pressed portion is pressed by the tubular member.

3. The electric compressor according to claim 2 , wherein
the connected portion extends in a direction parallel to a fastening direction of the fastener, and
the pressed portion extends in a direction orthogonal to the fastening direction of the fastener.

4. The electric compressor according to claim 1 , wherein
the tubular member includes
a tubular segment in which the fastener is insertable therein, and
a flange protruding outward in a radial direction of the tubular segment from an end of the tubular segment adjacent to the cover, and

the holder further includes a tubular interposition portion interposed between the flange and the bus bar.

5. The electric compressor according to claim 1 , wherein
the tubular member includes a tubular segment in which the fastener is insertable therein,
the holder further includes a tubular interposition portion interposed between the cover and the bus bar, with the interposition portion being in contact with an outer periphery of the tubular segment, and
the outer periphery of the tubular segment is roughened.

6. The electric compressor according to claim 1 , wherein
the cover is composed of an electrically conductive material, and
the tubular member is composed of an electrically conductive material.

Assignees

• Toyota Jidoshokki Kk

Inventors

• Kinoshita Yusuke
• Enami Shingo
• Yano Junya

Classifications

• F04B35/04

  the means being electric · CPC title

• B60H2001/006

  Noise reduction · CPC title

• F04C29/0085

  Prime movers · CPC title

• B60H1/3222

  characterised by the compressor driving arrangements, e.g. clutches, transmissions or multiple drives (B60H1/3208, B60H1/3226 take precedence) · CPC title

• H02K11/33 Primary

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title