Motor-driven compressor

Abstract

A motor-driven compressor includes a motor driving circuit including a capacitor electrically connected through a lead to a circuit board, and a capacitor holder that is made of a plastic and holds the capacitor. The capacitor holder includes a side wall, which covers a side surface of the capacitor. The lead protrudes from the side surface. The side wall includes a through-hole, which opens through each of a first end surface of the side wall facing the circuit board and a second end surface of the side wall opposite to the circuit board and guides the lead to a portion of the circuit board to which the lead is to be connected. The side wall includes a wall surface facing the capacitor. The wall surface includes a slit, which is continuous with the through-hole and opens opposite to the circuit board.

1 . A motor-driven compressor, comprising:
 a compression unit adapted to compress refrigerant;   an electric motor adapted to drive the compression unit;   a housing that accommodates the compression unit and the electric motor;   a motor driving circuit that is adapted to drive the electric motor and includes a circuit board and a capacitor, wherein the capacitor is electrically connected through a lead to the circuit board; and   a capacitor holder that is made of a plastic and holds the capacitor, wherein   the capacitor holder includes a side wall, which covers a side surface of the capacitor, wherein the lead protrudes from the side surface,   the side wall includes a through-hole, which opens through each of a first end surface of the side wall facing the circuit board and a second end surface of the side wall opposite to the first end surface, wherein the through-hole guides the lead toward a portion of the circuit board to which the lead is to be connected, and   the side wall includes a wall surface facing the capacitor, and the side wall includes a slit in the wall surface, which is continuous with the through-hole and opens opposite to the circuit board.   
     
     
         2 . The motor-driven compressor according to  claim 1 , wherein
 the capacitor has a substantially box shape, and   the capacitor holder has a hollowed polygonal shape having the side wall as one side such that the capacitor holder surrounds four sides of the capacitor.   
     
     
         3 . The motor-driven compressor according to  claim 2 , wherein
 the capacitor of the motor driving circuit is one of a plurality of capacitors, and   the capacitor holder holds the capacitors.   
     
     
         4 . The motor-driven compressor according to  claim 3 , wherein the through-hole is one of a plurality of through-holes, and the through-holes each correspond to an adjacent pair of the capacitors. 
     
     
         5 . The motor-driven compressor according to  claim 4 , wherein
 the first end surface of the side wall includes openings of the through-holes each corresponding to an adjacent pair of the capacitors, wherein the openings of the through-holes are arranged on the same straight line, and   the capacitors in each adjacent pair are arranged shifted from each other in a direction in which the openings of the through-holes are arranged.   
     
     
         6 . The motor-driven compressor according to  claim 1 , wherein the capacitor is a film capacitor. 
     
     
         7 . The motor-driven compressor according to  claim 1 , further comprising a rotation shaft that is accommodated in the housing and rotated integrally with a rotor of the electric motor, wherein
 the compression unit, the electric motor, and the motor driving circuit are arranged in this order along an axis of the rotation shaft.