| 摘要 |
PURPOSE:To make operation of a refrigerating cycle at the time of low temperature performable, by driving an intake door in a direction, where an inside air suction port is expanded wide, till suction air temperature becomes more than the specified value, while allowing operation of a compressor in preference to a freeze proofing device. CONSTITUTION:In an arithmetic and control unit 31, there is provided with a circuit 33 which outputs opening in a direction, where an inside air suction port of an intake door is expanded wide from the full-close position when outside temperature is less than the specified value, while addes the opening toll the suction temperature detected by a sensor 10 becomes more than the specified value and outputs it. And, at the output side of this circuit 33, there is provided with a circuit 36 which compares each operation value of compressor on-off circuit 34 and 33 or an evaporator freeze proofing device with output value of an intake door opening sensor 12 and outputs the differential opening. Also, at the output side of this circuit 36, there is provided with a circuit 35 which outputs a driving signal to an intake door operating actuator 11. |
