| 摘要 |
PURPOSE:To increase the operating efficiency of a compressor by decreasing the number of ON-OFF operations by changing the capacity of the compressor when the temperature at the outlet of an evaporator reaches a set value. CONSTITUTION:A freezing cycle is composed of a capacity variable compressor 2 which is driven by an engine 1 and of which capacity is able to be changed according to a cooling load, a condensor 6, a liquid receiver 7, an expansion valve 8 and an evaporator 9. The temperature at the outlet of the above-mentioned evaporator 9 in a duct 10 provided with a fan 11 is detected by a temperature sensor 15, and the detected value is compared with the set value in a controller 16. The capacity of the compressor 2 is changed to a low capacity by a capacity changing mechanism 3, when the temperature at the outlet of an evaporator 9 is lower than the set value, on the other hand, it is changed to a high capacity, when the temperature is higher than the set value. |
