Electric Compressor and Air Conditioning System for vehicle, Using the Electric Compressor

Abstract

An electric compressor ( 20 ) comprises an electric motor ( 70 ) enclosed in a motor casing ( 33 ), a division wall ( 60 ) dividing the interior of the motor casing ( 33 ) and having an inner side surface in contact with a working fluid before compressed, a leg ( 120 ) integrally formed on an outer side surface of the division wall ( 60 ), and a control board ( 111 ) with a microcomputer ( 112 ) for driving the electric motor ( 70 ) mounted, the control board being fixed to the leg ( 120 ).

1 . An electric compressor, comprising:
 an electric motor for driving a compression unit for compressing a working fluid, enclosed in a housing together with the compression unit,   a division wall dividing the interior of the housing and having an inner side surface in contact with a working fluid before compressed by the compression unit,   a leg integrally formed on an outer side surface of the division wall, and   a first circuit board on which electric components for driving the electric motor are mounted, the first circuit board being fixed to the leg.   
   
   
       2 . The electric compressor according to  claim 1 , wherein
 at least one of said electric components mounted on the circuit board is in contact with said outer side surface.   
   
   
       3 . The electric compressor according to  claim 1 , wherein
 a distal end of the leg is in contact with a metal part of the circuit board.   
   
   
       4 . The electric compressor according to  claim 3 , wherein
 the metal part is a ground terminal of the circuit board.   
   
   
       5 . The electric compressor according to  claim 2 , wherein
 a distal end of the leg is in contact with a metal part of the circuit board.   
   
   
       6 . The electric compressor according to  claim 5 , wherein
 the metal part is a ground terminal of the circuit board.   
   
   
       7 . The electric compressor according to  claim 1 , further comprising:
 a temperature sensor fixed to the circuit board, and   a control means for driving the electric motor basing on a result of detection by the temperature sensor.   
   
   
       8 . The electric compressor according to  claim 7 , wherein
 when, in a waiting state of the electric compressor, temperature detected by the temperature sensor rises above an activation temperature, the control means temporarily drives the electric motor.   
   
   
       9 . The electric compressor according to  claim 8 , wherein
 when, in the waiting state of the electric compressor, the temperature detected by the temperature sensor drops to or below a stop temperature, the control means stops the temporarily-driven electric motor.   
   
   
       10 . The electric compressor according to  claim 1 , further comprising a second circuit board on which electric components for driving the electric motor in cooperation with said electric components on the first circuit board are mounted, wherein
 at least one of the electric components on the second circuit board is in contact with said outer side surface.   
   
   
       11 . An automotive air conditioning system comprising an electric compressor disposed in an engine room, said electric compressor comprising:
 an electric motor for driving a compression unit for compressing a working fluid, enclosed in a housing together with the compression unit,   a division wall dividing the interior of the housing and having an inner side surface in contact with a working fluid before compressed by the compression unit,   a leg integrally formed on an outer side surface of the division wall, and   a first circuit board on which electric components for driving the electric motor are mounted, the first circuit board being fixed to the leg.   
   
   
       12 . The automotive air conditioning system according to  claim 11 , wherein
 at least one of said electric components mounted on the circuit board is in contact with said outer side surface.   
   
   
       13 . The automotive air conditioning system according to  claim 11 , wherein
 a distal end of the leg is in contact with a metal part of the circuit board.   
   
   
       14 . The automotive air conditioning system according to  claim 13 , wherein
 the metal part is a ground terminal of the circuit board.   
   
   
       15 . The automotive air conditioning system according to  claim 12 , wherein
 a distal end of the leg is in contact with a metal part of the circuit board.   
   
   
       16 . The automotive air conditioning system according to  claim 15 , wherein
 the metal part is a ground terminal of the circuit board.   
   
   
       17 . The automotive air conditioning system according to  claim 11 , wherein the electric compressor further comprises:
 a temperature sensor fixed to the circuit board, and   a control means for driving the electric motor basing on a result of detection by the temperature sensor.   
   
   
       18 . The automotive air conditioning system according to  claim 17 , wherein
 when, in a waiting state of the electric compressor, temperature detected by the temperature sensor rises above an activation temperature, the control means temporarily drives the electric motor.   
   
   
       19 . The automotive air conditioning system electric compressor according to  claim 18 , wherein
 when, in the waiting state of the electric compressor, the temperature detected by the temperature sensor drops to or below a stop temperature, the control means stops the temporarily-driven electric motor.   
   
   
       20 . The automotive air conditioning system according to  claim 11 , wherein
 the electric compressor further comprises a second circuit board on which electric components for driving the electric motor in cooperation with said electric components on the first circuit board are mounted, and   at least one of the electric components on the second circuit board is in contact with said outer side surface.