Patent ID: 6439858
Filing Date: 2002-08-27
Classification: F04B

Abstract:
A control valve for a variable capacity compressor, comprising:a valve housing having a valve port formed between an inlet port and an outlet port: a valve member disposed inside the valve housing for movement relative to the valve port to control the flow rate through the adjustment of the opening degree of the valve port; a solenoid magnetization unit coupled to the valve housing, the solenoid magnetization unit including a cylindrical solenoid assembly having a central axis, and having one axial end located proximate to the valve housing and the other axial end located distally from the valve housing, a fixed suction member located at the distal end of the solenoid assembly, a plunger, having an inner cylindrical portion, disposed within said solenoid assembly for movement axially thereof, the plunger having one axial end proximate to the valve housing and the other axial end distal from the valve housing, the proximate end of the plunger being operatively coupled to the valve member for moving the valve member relative to the valve port, the plunger being movable in the direction of the fixed suction member by the magnetization of the solenoid assembly, and a plunger spring for urging the plunger to move in the direction away from the fixed suction member; and a pressure sensitive bellows for actuating the opening or closing of the valve, the bellows being located within the inner cylindrical portion of the plunger and being expandable and contractible relative thereto in the axial direction of the solenoid assembly, the bellows being operatively coupled at one axial end thereof to the proximate end of the plunger and at the other axial end thereof to the fixed suction member.