Patent ID: 9022061
Filing Date: 2015-05-05
Classification: F04B,Y10T

Abstract:
1. A displacement control valve for a variable displacement compressor comprising: a valve housing having a discharge chamber connecting space and a crank chamber connecting space, the discharge chamber connecting space being in fluid communication with a discharge chamber of the variable displacement compressor, the crank chamber connecting space being in fluid communication with a crank chamber of the variable displacement compressor, wherein the valve housing comprises a hole providing a fluid communication channel between the discharge chamber connecting space and the crank chamber connecting space; a valve body configured to reciprocate within the valve housing to open and close the fluid communication channel, wherein the valve body comprises a large diameter portion and a small diameter portion having a diameter smaller than that of the large diameter portion, the small diameter portion being inserted in the hole, wherein the valve body further comprises a valve seat disposed between the large diameter portion and the small diameter portion and configured to open and close the fluid communication channel, wherein the valve body is biased by a spring to open the fluid communication channel, wherein the valve body comprises a first end to which a suction pressure is applied and a second end to which a crank chamber pressure is applied, the second end being coupled to the solenoid; a solenoid configured to move the valve body; and a thermally deformable means installed in the discharge chamber connecting space of the valve housing and coupled to the valve housing and the valve body such that deformation of the thermally deformable means causes the valve body to open or close the fluid communication channel.