| 摘要 |
PURPOSE:To perform prevention of freezing together by supplying a freezing detector with the output of a temperature sensor for correcting the opening degree of an air-mixing door which is arranged in the vicinity of a cooler and used for adjusting the rate of mixture of warm air with cooled air. CONSTITUTION:When the compressor 3 is turned off, the temperature sensor 30 detectes the cooled air from an evaporator 1 and sends the output thereof to a controller 5 for driving an actuator, thereby correcting the opening degree of the mixing door 10 and preventing the difference in levels of the blow-out temperature. When the compressor 3 is turned on, a relay 31 operates, contact points 31 and 32 for shifting are shifted and the temperature sensor 30 sends out the output thereof to the freezing detector 33. In the freezing detector 33, the output of the sensor 30 is discriminated and, when the occurrence of freezing is discriminated, a contact point 331 is turned off, a relay 34 is deactuated, a contact point 341 is turned off, and thereby the action of the compressor 3 is stopped. |
