Refrigerant metering in a variable flow system

Details Refrigerant metering in a variable flow system Refrigerant metering in a variable flow system

F - Mech Eng,Light,Heat,Weapons

25

B

62/40

F25B 41/00 (2006.01) F25B 41/06 (2006.01)

Patent

CA 1315999

REFRIGERANT METERING IN A VARIABLE FLOW SYSTEM ABSTRACT OF THE DISCLOSURE In a refrigeration system having a compressor driven by a variable speed motor, the refrigerant flow volume through the expansion device is controlled by way of a solenoid driven piston which alternately opens and closes the orifice, with the duty cycle of the solenoid being controlled such that the time period in which the orifice is open is proportional to the speed of the motor. A bypass channel is provided in parallel around the orifice such that a minimal flow is provided to thereby share the load with the modulating orifice and act to dampen the movement of the solenoid piston.

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