Air conditioning apparatus for an electric vehicle using least p

Heat exchange – Movable heating or cooling surface – Rotary drum

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165 111, 165 42, 165 43, 237 21B, F25B 2900

Patent

active

055012671

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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patent: 4994958 (1991-02-01), Iida
patent: 5325912 (1994-07-01), Hotta et al.

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