Patent ID: 8857199
Filing Date: 2014-10-14
Classification: F25B,F25D,Y02B

Abstract:
1. A refrigerating apparatus comprising: a first refrigerant circuit including a first compressor, a first condenser, a first pressure reducer, and a first evaporator, connected circularly with a first refrigerant pipe, a refrigerant discharged from the first compressor being condensed at the first condenser and thereafter evaporated at the first evaporator to acquire a cooling effect; a second refrigerant circuit including a second compressor, a second condenser, a second pressure reducer, and a second evaporator, connected circularly with a second refrigerant pipe, a refrigerant discharged from the second compressor being condensed at the second condenser and thereafter evaporated at the second evaporator to acquire a cooling effect; a temperature sensor configured to detect a temperature of an internal portion of a cold storage cabinet, the first evaporator and the second evaporator being disposed to cool the internal portion; and a controller configured to control the first compressor and the second compressor based on a temperature detected by the temperature sensor in such a manner that: (i) when the detected temperature increases and reaches a first temperature while both the first compressor and the second compressors are off, only the first compressor starts and continues operating until the detected temperature decreases and reaches a second temperature lower than the first temperature; (ii) when the detected temperature decreases and reaches the second temperature while the first compressor is on but the second compressor is off, the first compressor stops operating and both the first compressor and the second compressor continue stopping until the detected temperature increases and reaches the first temperature again; (iii) when the detected temperature increases and reaches the first temperature again while both the first compressor and the second compressors are off, only the second compressor starts and continues operating until the temperature decreases and reaches the second temperature again; and (iv) when the detected temperature decreases and reaches the second temperature again while the second compressor is on but the first compressor is off, the second compressor stops operating and both first compressor and the second compressor continue stopping again until the detected temperature increases and reaches the first temperature again.