Motor-driven compressor

Abstract

A motor-driven compressor includes a housing made of a metal material, a compression portion, an electric motor, and a cover. The compression portion and the electric motor are accommodated in the housing, and the cover is attached to the housing. The cover is formed by a plastic portion and a shield made of a metal material that intercepts electromagnetic noise. A motor drive circuit for driving the electric motor is accommodated in an accommodation space defined by the housing and the cover. An elastic sealing member is located between the housing and the cover. The shield includes an extended portion that extends toward the housing and is arranged inside the sealing member. The extended portion is in contact with the housing.

1 . A motor-driven compressor, comprising:
 a housing made of a metal material;   a compression portion and an electric motor accommodated in the housing;   a cover attached to the housing and configured by a plastic portion and a shield made of a metal material that intercepts electromagnetic noise;   a motor drive circuit accommodated in an accommodation space defined by the housing and the cover, wherein the motor drive circuit drives the electric motor; and   an elastic sealing member located between the housing and the cover, wherein   the shield includes an extended portion that extends toward the housing and is arranged inside the sealing member, and   the extended portion is in contact with the housing.   
     
     
         2 . The motor-driven compressor according to  claim 1 , wherein the extended portion has a spring property. 
     
     
         3 . The motor-driven compressor according to  claim 1 , wherein the extended portion contacts a whole inner peripheral surface of the sealing member. 
     
     
         4 . The motor-driven compressor according to  claim 1 , further comprising:
 a rotor accommodated in the housing, the rotor configuring the electric motor; and   a rotary shaft accommodated in the housing, the rotary shaft rotating integrally with the rotor, wherein   the compression portion, the electric motor, and the motor drive circuit are arranged in this order in an axial direction of the rotary shaft.   
     
     
         5 . The motor-driven compressor according to  claim 1 , wherein the shield extends over a whole inner surface of the plastic portion. 
     
     
         6 . The motor-driven compressor according to  claim 1 , wherein the housing includes an annular extension contacting the sealing member, and wherein the extended portion is annular and has a tip end contacting the extension.