Electric compressor

Patent metadata

Field	Value
Publication number	US-11486378-B2
Application number	US-202117157488-A
Country	US
Kind code	B2
Filing date	Jan 25, 2021
Priority date	Jan 30, 2020
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

An electric compressor includes a housing, an inverter, an inverter case, a case bottom wall, and a case peripheral wall. The inverter case has a seal peripheral wall. The seal peripheral wall has a cylindrical shape and extends from the case bottom wall in a direction opposite to a direction in which the case peripheral wall extends. The seal peripheral wall surrounds a part of an outer peripheral surface of the housing. A seal member having an annular shape seals a gap between an inner peripheral surface of the seal peripheral wall and the outer peripheral surface of the housing.

First claim

What is claimed is:

1. An electric compressor comprising:
a compression part configured to compress fluid;
an electric motor configured to drive the compression part;
an inverter including a circuit board that is configured to drive the electric motor;
a housing having a bottomed-cylindrical shape and accommodating the electric motor;
an inverter case having a bottomed-cylindrical shape, wherein the inverter case has:
a case bottom wall having a plate-like shape and facing a bottom wall of the housing; and
a case peripheral wall having a cylindrical shape and extending from an outer peripheral portion of the case bottom wall;

an inverter cover closing an opening of the case peripheral wall and cooperating with the inverter case to form an inverter accommodation chamber for accommodating the inverter; and
a fastening bolt for fastening the inverter case to the housing,
wherein the compression part, the electric motor, and the inverter are arranged in this order in an axial direction of a rotary shaft,
wherein the case bottom wall has a through hole, and an electronic component is mounted on the circuit board is inserted through the through hole and thermally in contact with an outer surface of the bottom wall of the housing,
wherein a seal member having an annular shape seals a gap between the inverter case and the housing,

wherein
the inverter case has a seal peripheral wall that has a cylindrical shape and extends from the case bottom wall in a direction opposite to a direction in which the case peripheral wall extends,
the seal peripheral wall surrounds a part of an outer peripheral surface of the housing, and
the seal member seals a gap between an inner peripheral surface of the seal peripheral wall and the outer peripheral surface of the housing.

2. The electric compressor according to claim 1 , wherein
the electric compressor includes a gasket that has a loop shape and seals a gap between an end face of the case peripheral wall and the inverter cover,
the case bottom wall has a surface adjacent to the seal peripheral wall, and
the surface of the case bottom wall is in contact with the outer surface of the bottom wall of the housing.

3. The electric compressor according to claim 1 , wherein
the circuit board has another electronic component mounted on the circuit board, wherein the another electronic component is mounted on a mounting surface area that is a part of a surface of the case bottom wall adjacent to the case peripheral wall, and
the mounting surface area of the surface is closer to the inverter cover than an area of the surface other than the mounting surface area is.

Assignees

• Toyota Jidoshokki Kk

Inventors

• Okochi Takeshi
• Yano Junya
• Kinoshita Yusuke
• Yamakage Shumpei

Classifications

• F05B2260/301

  Retaining bolts or nuts · CPC title

• H02K5/225

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title

• H02P27/06

  using DC to AC converters or inverters (H02P27/05 takes precedence) · CPC title

• F05B2210/14

  Refrigerants with particular properties, e.g. HFC-134a · CPC title

• F04B39/06 Primary

  Cooling; Heating; Prevention of freezing · CPC title