Electric compressor

Abstract

The present invention provides an electric compressor in which a lead wire on the motor driving circuit side can be electrically connected positively to a sealed terminal. Because the sealed terminal is formed from a terminal body which is made of a metal having electrical conductivity and whose end is provided with a male threaded portion, and a joining nut made of a metal having electrical conductivity and which is different from the material for the terminal body, and is threadably mounted on the male threaded portion of the terminal body, it is possible to positively join the joining nut of a different material to the terminal body and to positively join the lead wire of the same material as the joining nut to the joining nut by welding, whereby it becomes possible to electrically connect a lead wire on the driving circuit housing chamber side positively to the sealed terminal.

1 . An electric compressor comprising:
 a compression section for compressing a cooling medium; a motor for driving the compression section;   a motor driving circuit for driving the motor; and a sealed terminal which is provided in a partition wall for partitioning a space between the motor and the motor driving circuit and is intended for electrically connecting a lead wire on the motor side and a lead wire on the motor driving circuit side,   wherein the sealed terminal has a terminal body which is made of a metal having electrical conductivity and whose end is provided with a male threaded portion, and a joining member made of a metal having electrical conductivity and which is different from the material for the terminal body, the joining member being provided so as to be capable of being screwed to the male threaded portion of the terminal body.   
     
     
         2 . The electric compressor according to  claim 1 , wherein the terminal body is made of a ferrous metal and the joining member is made of a cuprous metal. 
     
     
         3 . The electric compressor according to  claim 1  or  2 , wherein the length along which the joining member fits over the male threaded portion of the terminal body is not less than 0.4 times the diameter of the male threaded portion. 
     
     
         4 . The electric compressor according to  claim 2 , wherein the length along which the joining member fits over the male threaded portion of the terminal body is not less than 0.4 times the diameter of the male threaded portion.