Displacement controlling structure for clutchless variable...

Details Displacement controlling structure for clutchless variable... Displacement controlling structure for clutchless variable...

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 1/29 (2006.01) F04B 27/18 (2006.01) F04B 49/06 (2006.01)

Patent

CA 2178875

A variable displacement compressor which has a suction chamber, a discharge chamber, and a crank chamber. The displacement of the compressor is controlled by supplying refrigerant to the crank chamber from the discharge chamber via a pressurizing passage and releasing the gas into the suction chamber via a pressure releasing passage. An increase in the pressure in the crank chamber decreases the displacement, and a decrease in the pressure in the crank chamber increases the displacement. A displacement controlling structure of the compressor includes an electromagnetic valve which alters the size of an area of the pressurizing passage. A computer controls the electromagnetic valve in accordance with commands to alter the displacement. The computer enlarges the opened area of the pressurizing passage by controlling the electromagnetic valve in response to commands to reduce the displacement.

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