Refrigerating system having a compressor with an internally...

Details Refrigerating system having a compressor with an internally... Refrigerating system having a compressor with an internally...

F - Mech Eng,Light,Heat,Weapons

25

B

62/23

F25B 49/02 (2006.01) F04B 27/18 (2006.01)

Patent

CA 1332875

A refrigerating system including a refrigerant circuit having a condenser, evaporator and wobble plate type compressor with a varia- ble displacement mechanism. Two passages communicate between the crank chamber and the suction chamber in the cylinder block. A bellows is disposed in a first passage and controls the communication between the crank chamber and the suction chamber response to crank chamber pressure. A control valve is disposed in the second passage and controls communication between the crank chamber and the suction chamber in the second passage in response to a signal gen- erated outside of the compressor. A control circuit controls the gen- eration of the signal in response to thermodynamic characteristics related to the evaporator. The signal activates or deactivates the second control valve when the characteristic indicates a value beyond a predetermined range of values. This configuration enables the com- pressor to obtain better cool down characteristics in the passenger compartment of an automobile.

578155

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