Electric compressor

Abstract

Provided is an electric compressor which includes a motor which rotates a rotary shaft of a impeller; a housing which accommodates the motor; a plate attached to the housing mounted with a control circuit configured to drive and control the motor; and a refrigerant flow passage provided between the housing and the plate. At least a part of the refrigerant flow passage is formed by a heat radiation fin provided on at least one of the housing and the plate.

1 .- 6 . (canceled) 
     
     
         7 . An electric compressor comprising:
 a motor which rotates a rotary shaft of an impeller;   a housing which accommodates the motor;   a plate attached to the housing and mounted with a control circuit configured to drive and control the motor; and   a refrigerant flow passage provided between the housing and the plate,   wherein at least a part of the refrigerant flow passage is formed by a heat radiation fin provided on at least one of the housing and the plate.   
     
     
         8 . The electric compressor according to  claim 7 , wherein the heat radiation fin is provided on both the housing and the plate. 
     
     
         9 . The electric compressor according to  claim 8 , wherein the heat radiation fin provided on the housing side and the heat radiation fin provided on the plate side are alternately arranged. 
     
     
         10 . The electric compressor according to  claim 7 , further comprising:
 a pair of bearings disposed to sandwich the motor therebetween and supporting the rotary shaft,   wherein the housing includes a partition wall between one bearing on the side closer to the plate among the pair of bearings and the plate, and   a bearing support portion which supports the one bearing is provided inside the partition wall, and the refrigerant flow passage is provided outside the partition wall facing the bearing support portion.   
     
     
         11 . The electric compressor according to  claim 7 , wherein the refrigerant flow passage is a one-pass meandering flow passage having a folded portion, and
 the folded portion is bent.   
     
     
         12 . The electric compressor according to  claim 7 , wherein a surface area facing the refrigerant flow passage is larger on the plate side than on the housing side.