| 摘要 |
PROBLEM TO BE SOLVED: To reduce a refrigerant quantity, and to enhance efficiency in a cooling cycle using a combustible refrigerant. SOLUTION: A closed loop is formed of a compressor 12, a condenser 2, a passage control means 13, a first pressure reducing means 7, and a first evaporator 3. A second pressure reducing means 8 and a second evaporator 5 are connected so as to become parallel to the first pressure reducing means 7 and the first evaporator 3. Since cooling is performed by alternately switching the two evaporators 3 and 5 by the cooling cycle for arranging the passage control means 13 on the inlet side of the first pressure reducing means V and the second pressure reducing means 8, pipe capacity of a cooling system and the refrigerant quantity can be reduced more than a cooling system for performing cooling by one evaporator and a cooling system for performing cooling by flowing the refrigerant in parallel to a plurality of evaporators. COPYRIGHT: (C)2003,JPO
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