Apparatus for measuring refrigerant flow rate in refrigeration cycle
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United States of America Patent
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Mar 31, 1987
Grant Date -
N/A
app pub date -
Jul 2, 1985
filing date -
Jul 2, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A refrigerant flow rate measuring apparatus has a means for detecting the opening degree A of an expansion valve of a refrigeration cycle, a pressure detecting means for detecting the refrigerant pressure Pi at upstream side of the expansion valve, a pressure detecting means for detecting the refrigerant pressure Po at downstream side of the expansion valve, a refrigerant density detecting means for detecting the density .gamma.i of the refrigerant at the inlet side of the expansion valve, a converting means for directly or indirectly converting the values detected by the detecting means into electric signals, and a calculating means for calculating the flow rate of the refrigerant in accordance with the following formula, from the electric signals. ##EQU1##
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