| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a refrigerating apparatus capable of reducing the drive of the compressor in the high temperature side cycle as much as possible, while suppressing the pressure rise of refrigerant in an evaporator in the low temperature side cycle during defrosting. <P>SOLUTION: The refrigerating apparatus has a high temperature side cycle 10 connecting the high temperature side compressor 11, the high temperature side condenser 12, the high temperature side throttle device 13, and the high temperature side evaporator 14, and forming the high temperature side coolant circulation circuit circulating the high temperature side coolant, the low temperature side cycle 20 connecting the low temperature side compressor 21, the low temperature side condenser 22, the low temperature side throttle device 23, and the low temperature side evaporator 24, forming the low temperature side coolant circulation circuit circulating carbon dioxide as the low temperature side coolant, and having the liquid receiver 25 and a solenoid valve 26 in the coolant discharge side of the low temperature side condenser 22, the cascade condenser 30 having the high temperature side evaporator 14 and the low temperature side condenser 22 and performing the heat-exchanging between the high temperature coolant and the low temperature side coolant, and the control means 40 controlling the heating of the defrosting heater 27 during defrosting based on the detected pressure of the suction side pressure 52 and the detected temperature of the evaporator temperature sensor 51. <P>COPYRIGHT: (C)2012,JPO&INPIT |
