Electric compressor

Patent metadata

Field	Value
Publication number	US-10498201-B2
Application number	US-201715852806-A
Country	US
Kind code	B2
Filing date	Dec 22, 2017
Priority date	Dec 27, 2016
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

An electric compressor includes a housing and a cover. The housing accommodates a compression portion and an electric motor. The cover is attached to an outer surface of the housing and cooperates with the outer surface of the housing to define an accommodation space. An inverter is accommodated in the accommodation space and configured to drive the electric motor. The inverter includes a circuit board, an electrolytic capacitor, and a capacitor cover at least partly covering the electrolytic capacitor. The electrolytic capacitor includes a cylindrical main body having a first end and a second end, a lead extending from the first end of the main body and connected to the circuit board, and a pressure relief vent on the second end of the main body. The capacitor cover is interposed between the circuit board and a peripheral edge of the second end of the electrolytic capacitor.

First claim

What is claimed is:

1. An electric compressor comprising:
a housing accommodating a compression portion and an electric motor;
a cover attached to an outer surface of the housing, the cover cooperating with the outer surface of the housing to define an accommodation space; and
an inverter accommodated in the accommodation space and configured to drive the electric motor, wherein
the inverter includes a circuit board, an electrolytic capacitor, and a capacitor cover at least partly covering the electrolytic capacitor,
the electrolytic capacitor includes a cylindrical main body having a first end and a second end, a lead extending from the first end of the main body and connected to the circuit board, and a pressure relief vent on the second end of the main body,
the capacitor cover is interposed between the circuit board and a peripheral edge of the second end of the electrolytic capacitor,
the capacitor cover has a wall opposed to the second end of the electrolytic capacitor,
the wall has an opposing surface portion that faces the pressure relief vent on the second end of the electrolytic capacitor and is spaced away from the pressure relief vent,
the capacitor cover includes a positioning portion to determine a position of the electrolytic capacitor in the capacitor cover, and
the positioning portion projects toward the second end of the electrolytic capacitor from a portion of the wall other than the opposing surface portion.

2. The electric compressor according to claim 1 , wherein the first end and the second end of the electrolytic capacitor are ends of the electrolytic capacitor in an axial direction of the electrolytic capacitor, and the electrolytic capacitor is disposed such that the axial direction of the electrolytic capacitor is parallel to the circuit board.

3. The electric compressor according to claim 1 , wherein the capacitor cover has a box shape for accommodating the electrolytic capacitor.

4. The electric compressor according to claim 1 , wherein
the electric compressor includes a base having a metal main body having a plate shape and disposed between the inverter and the housing,
the main body has a surface facing the inverter and has a recess formed in the surface in a thickness direction of the main body, and
the electrolytic capacitor is disposed within the recess in the main body.

5. The electric compressor according to claim 4 , wherein
the capacitor cover has an opening and an opening edge of the opening, and
the opening edge of the capacitor cover has a projection portion extending from the opening edge and configured to come into contact with a bottom surface of the recess.

Assignees

• Toyota Jidoshokki Kk

Inventors

• Fujii Akio
• Momma Kenji

Classifications

• F04B35/04 Primary

  the means being electric · CPC title

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• H02K11/33 Primary

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

• H01G9/12

  Vents or other means allowing expansion · CPC title

• H01G9/145

  Liquid electrolytic capacitors (H01G11/00 takes precedence) · CPC title