Electric compressor for vehicle air conditioner

Abstract

An electric compressor for a vehicle air conditioner capable of preventing refrigerant leakage is provided. A case ( 77 ) is formed by injecting a molten metal into a mold, and a compression unit for compressing a refrigerant is accommodated inside, wherein a machined portion ( 123 ) is formed on one of an inner circumferential surface ( 77 A) in contact with the refrigerant and an outer circumferential surface adjacent to the inner circumferential surface.

1 . An electric compressor for a vehicle air conditioner, wherein a case is formed by injecting a molten metal into a mold, and a compression unit for compressing a refrigerant is accommodated inside, and
 wherein a machined portion is formed on one of an inner circumferential surface in contact with the refrigerant and an outer circumferential surface adjacent to the inner circumferential surface.   
   
   
       2 . An electric compressor for a vehicle air conditioner according to  claim 1 , wherein a thickness between the machined portion and an inner circumferential portion, or a thickness between the machined portion and an outer circumferential portion is larger than that between the inner circumferential surface and the outer circumferential surface. 
   
   
       3 . An electric compressor for a vehicle air conditioner according to  claim 1 , wherein
 a pressure case that accommodates the compression unit and an electrical-equipment case that accommodates electrical parts that control an electric motor for driving the compression unit are integrally provided in the case, and   the molten metal is injected from the pressure case side.   
   
   
       4 . An electric compressor for a vehicle air conditioner according to  claim 3 , wherein
 the pressure case is a substantially cylindrical member having at least a bottom surface, a plurality of ribs that radially extend being provided on the bottom surface, and   a suction hole through which the refrigerant flows into the pressure case from outside is provided so as to pass through between the plurality of ribs in the case.   
   
   
       5 . An electric compressor for a vehicle air conditioner according to  claim 4 , wherein a boss that supports a rotation shaft of the compression unit is provided at the center portion of the bottom surface, and
 the suction hole is a through-hole extending toward the boss.   
   
   
       6 . An electric compressor for a vehicle air conditioner according to  claim 4 , wherein a discharge hole in which the refrigerant flows out from the pressure case is provided in the pressure case, and
 the suction hole and the discharge hole are formed substantially in the same direction with respect to the case.   
   
   
       7 . An electric compressor for a vehicle air conditioner according to  claim 4 , wherein
 the suction hole is located at a position higher than the central axis of the pressure case when the pressure case is attached to a desired attachment position.