Motor-driven compressor

Abstract

A securing means for an insulating member that is advantageous in improving the efficiency of assembly of a motor-driven compressor is provided. Phase wires extending from an end face of a stator core, which is closer to a compression mechanism, are bound to form a phase wire bundle. The distal ends of the phase wires are electrically connected together, so that a wire connecting portion is formed at the distal end of the phase wire bundle. The wire connecting portion, which serves as a neutral point, is coated with an insulating tube made of insulating plastic. The distal end of the insulating tube is sealed. A receiving hole is formed in the cluster block. The insulating tube is fitted in the receiving hole and secured to the cluster block by contacting an inner surface of the receiving hole.

1 . A motor-driven compressor comprising:
 an electric motor having a stator;   a compression mechanism that is driven by the electric motor to compress refrigerant;   an outer shell for accommodating therein the electric motor and the compression mechanism;   a cluster block located inside the outer shell;   a phase wire bundle that is formed by binding a plurality of phase wires extending from a plurality of phase coils, which form the stator; and   a wire connecting portion serving as a neutral point, at which the phase wires of the phase wire bundle are connected together,   wherein the phase wire bundle and the wire connecting portion are coated with an insulating member, and the insulating member is secured to the cluster block by a securing means.   
     
     
         2 . The motor-driven compressor according to  claim 1 , wherein the securing means is defined by a receiving hole formed in the cluster block, the insulating member is fitted in the receiving hole, and the insulating member contacts an inner surface of the receiving hole. 
     
     
         3 . The motor-driven compressor according to  claim 2 , wherein the receiving hole has a tapering portion, the diameter of which decreases from an entrance of the receiving hole in the direction of depth, and a widening portion, the diameter of which increases from the tapering portion in the direction of depth. 
     
     
         4 . The motor-driven compressor according to  claim 2 , wherein the receiving hole is formed as a through hole that extends through the cluster block. 
     
     
         5 . The motor-driven compressor according to  claim 2 , wherein the cluster block includes connectors connected to lead wires extending from the phase coils, and the receiving hole and the connectors are arranged in parallel. 
     
     
         6 . The motor-driven compressor according to  claim 1 , wherein the securing means is a hook that extends from the cluster block, and the insulating member is hooked to the hook. 
     
     
         7 . The motor-driven compressor according to  claim 1 , wherein the stator has opposite end faces, and the compression mechanism, the electric motor, and a drive control section for the electric motor are arranged in that order in series, and the phase wires extend from one of the end faces of the stator that is closer to the compression mechanism. 
     
     
         8 . A motor-driven compressor comprising:
 an electric motor having a stator;   a compression mechanism that is driven by the electric motor to compress refrigerant;   an outer shell for accommodating therein the electric motor and the compression mechanism;   a cluster block located inside the outer shell;   a phase wire bundle that is formed by binding a plurality of phase wires extending from a plurality of phase coils, which form the stator; and   a wire connecting portion serving as a neutral point, at which the phase wires of the phase wire bundle are connected together,   wherein the phase wire bundle and the wire connecting portion are coated with an insulating member, and the insulating member is secured to the cluster block by a retainer.   
     
     
         9 . The motor-driven compressor according to  claim 8 , wherein the retainer is defined by a receiving hole formed in the cluster block, the insulating member is fitted in the receiving hole, and the insulating member contacts an inner surface of the receiving hole. 
     
     
         10 . The motor-driven compressor according to  claim 9 , wherein the receiving hole has a tapering portion, the diameter of which decreases from an entrance of the receiving hole in the direction of depth, and a widening portion, the diameter of which increases from the tapering portion in the direction of depth. 
     
     
         11 . The motor-driven compressor according to  claim 9 , wherein the receiving hole is formed as a through hole that extends through the cluster block. 
     
     
         12 . The motor-driven compressor according to  claim 9 , wherein the cluster block includes connectors connected to lead wires extending from the phase coils, and the receiving hole and the connectors are arranged in parallel. 
     
     
         13 . The motor-driven compressor according to  claim 8 , wherein the retainer is a hook that extends from the cluster block, and the insulating member is hooked to the hook. 
     
     
         14 . The motor-driven compressor according to  claim 8 , wherein the stator has opposite end faces, and the compression mechanism, the electric motor, and a drive control section for the electric motor are arranged in that order in series, and the phase wires extend from one of the end faces of the stator that is closer to the compression mechanism.