System for controlling flow rate of refrigerant
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United States of America Patent
Stats
-
May 24, 1988
Issued Date -
N/A
app pub date -
Mar 10, 1987
filing date -
Jul 26, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system for controlling the flow rate of a refrigerant for refrigeration cycles which comprises an 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 calculating 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 comparison, 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.
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