Electric compressor

Abstract

An electric compressor ( 10 ) is equipped with a motor chamber ( 27 ) provided in a suction pressure region. The motor chamber ( 27 ) is adjacent to an inverter accommodation chamber ( 101 ) with a first housing ( 24 ) therebetween, and a cooling hole ( 130 ) extending from the motor chamber ( 27 ) toward the inverter accommodation chamber ( 101 ) is formed through the first housing ( 24 ). The cooling hole ( 130 ) is a through-hole passing through the first housing ( 24 ). A cooling medium in the motor chamber ( 27 ) flows into the cooling hole ( 130 ) and comes into contact with a heat transfer plate ( 110 ), thereby cooling the heat transfer plate ( 110 ) directly.

1 . An electric compressor comprising:
 a compression mechanism portion for sucking in fluid from a suction pressure region;   an electric motor for driving the compression mechanism portion;   a motor chamber provided in the suction pressure region for accommodating the electric motor;   an inverter assembly for converting a direct current into a polyphase alternating current to supply the converted current to the electric motor, the inverter assembly controlling rotational frequency of the electric motor, with the inverter assembly being provided with a substrate having an electric circuit, electronic components connected to the substrate, and a base for supporting the substrate; and   an inverter accommodation chamber for accommodating the inverter assembly and removably fixing the inverter assembly;   a housing separating the motor chamber and the inverter accommodation chamber, the housing having formed therethrough a through-hole extending from the motor chamber toward the inverter accommodation chamber, the through-hole being in contact at one end thereof with the base, with the motor chamber and the inverter accommodation chamber being sealed from each other around the through-hole.   
   
   
       2 . The electric compressor according to  claim 1 , wherein the motor chamber and the inverter accommodation chamber are sealed from each other using an O-ring. 
   
   
       3 . The electric compressor according to  claim 1  or  2 , wherein: the electronic components include a switching element; and the through-hole is provided in a vicinity of the switching element.