Air conditioning apparatus for an electric vehicle using least power consumption between compressor and electric heater
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United States of America Patent
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-
Mar 26, 1996
Grant Date -
N/A
app pub date -
Dec 28, 1992
filing date -
Dec 27, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An air conditioning apparatus for heating a cabin of an electric car having reduced electric power consumption is disclosed. An initial setting of the heating operation is that of using a refrigerating cycle 17. An average value of actual electric power consumption using the refrigerating cycle for a predetermined period is calculated. Furthermore, electric power consumption using an electric heater 20 is calculated for obtaining the same heating capacity as that obtained by the refrigerating cycle. A switching of the heating operation from the refrigerating cycle to the electric heater 20 takes place when it is determined that electric power consumption using the electric heater is less than that using the refrigerating cycle 17.
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