| 摘要 |
PURPOSE:To suppress the temperature rise of a heat exchanger and to allow a refrigerating cycle to scarcely fall in a release control by accelerating an air flow rate varying speed if the temperature of the exchanger is higher than a set value, and decelerating the varying speed if it is lower than the set value. CONSTITUTION:When the temperature 14b of a heat exchanger is higher than a set temperature value, an air flow rate varying time is set to a designated time 4, and when the temperature 14b of the exchanger is lower than the set value, the varying time is set to a designated time 40. An air flow rate varying speed is set to 10rpm/0.2sec at the time 4, and a fan motor 12 is varied at 100rpm in 2 seconds. The varying speed is set to 10rpm/2sec at the time 40, and the motor 12 is varied at 100 rpm in 20 seconds. Thus, abrupt increase/ decrease in an air flow rate is avoided to suppress the temperature rise of the exchanger. |
