System for controlling flow rate of refrigerant

Details System for controlling flow rate of refrigerant System for controlling flow rate of refrigerant

F - Mech Eng,Light,Heat,Weapons

25

B

62/144

F25B 41/04 (2006.01) F25B 41/06 (2006.01) G05D 23/20 (2006.01)

Patent

CA 1250442

ABSTRACT OF THE DISCLOSURE A system for controlling the flow rate of a refrigerant for refrigeration cycles which comprises a electronic expansion valve disposed at the inlet of an evaporator and a controller for controlling the opening-closing movement of the valve. The controller comprises a calculat- ing unit for comparing the degree of superheat of the refrigerant measured at the evaporator with a preset degree of superheat and feeding a valve opening adjusting signal to the valve according to the value obtained by the compari- son, and a valve full-closing signal generator for comparing the measured temperature of the space to be cooled with a preset temperature and feeding a valve full-closing signal to the valve based on the value obtained from the comparison of temperatures, in preference to the opening adjusting signal.

487418

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