| 摘要 |
PROBLEM TO BE SOLVED: To obtain a cooling system for cooling a refrigeration compartment and a freezing compartment independently in which the quantity of refrigerant is reduced while enhancing the efficiency and the reliability is enhanced by preventing extremely low pressure operation of a compressor. SOLUTION: Immediately before switching the cooling operation from a freezing compartment 6 to a refrigeration compartment 4 and from the refrigeration compartment 4 to the freezing compartment 6, a compressor 1 is operated (pump down) for a predetermined time while closing both first and second on/off valves 10, 11 to purge a refrigerant standing in a first or second evaporator 3, 5 to the condenser 2 side (high pressure side). Subsequently, the first or second on/off valve 10, 11 is opened and cooling operation of the refrigeration compartment 4 or the freezing compartment 6 is started.
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