Refrigeration cycle apparatus and operating method of same
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United States of America Patent
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Dec 29, 2015
Grant Date -
Dec 20, 2012
app pub date -
Mar 25, 2010
filing date -
Mar 25, 2010
priority date (Note) -
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Abstract
A refrigeration cycle apparatus achieves efficient operation by constantly recovering power in a wide operating range. The refrigeration cycle apparatus regulates a pressure of a high pressure side by changing either one or both of an opening degree of the intermediate-pressure bypass valve and an opening degree of the pre-expansion valve on the basis of a density ratio that is obtained from an inflow refrigerant density of the expander and an inflow refrigerant density of the sub-compressor in an actual operating state and a design volume ratio that has been expected at the time of design and that is obtained from a stroke volume of the sub-compressor, a stroke volume of the expander, and a ratio of a flow rate of the refrigerant flowing to the sub-compressor.
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