| 摘要 |
PURPOSE:To operate the refrigerating cycle by the cpability corresponding to the load by using a veriable-capacity type compressor, which can change discharge capacity, and controlling capacity in case of operation in response to the degree of demand of the capability of air cooling. CONSTITUTION:The variable-capacity type compressor 12 incorporating a capacity variable member 18 is installed. The signals of temperature sensors 14, 19 are inputted to a control circuit 15, the large capacity operation and stoppage of operation of the compressor 12 are alternately changed over when room temperature is high and the large capaciblity of air cooling is required, small capacity operation and the stoppage of operation are alternately changed over when room temperature is low and the capability of air cooling is not needed so much, the freezing of an evaportor 5 is prevented, and these changeover is controlled with the change of room temperature. Accordingly, the refrigerating cycle can be operated in capability corresponding to the load as required, the power consumption of the compressor 12 is suppressed, and noises can be reduced down to low value. |
