| 摘要 |
PROBLEM TO BE SOLVED: To further reduce the cost of introduction, while solving the problem, wherein sharp cost reduction cannot be achieved, because an electronic expansion valve and a flow control valve are needed for each storehouse. SOLUTION: This cooling device maintains a plurality of storages 10 in a desired temperature state by providing the plurality of storages 10 with individual evaporators 12, and expanding a refrigerant discharged from a condenser 13 by a solenoid expansion valve 21, and then supplying the expanded refrigerant divergently to these evaporators 12. The refrigerant, discharged from the condenser 13, is expanded by the solenoid expansion valve 21 before diverging, while a refrigerant-circulating supply passage is constituted in a form of making individual solenoid on-off valves 20 interposed, in branch passages 15a leading to the individual evaporators 12. Furthermore, refrigerant supply control to the respective evaporators 12 is performed by driving the individual solenoid on-off valves 20, and the opening of the electronic expansion valve 21 is controlled so that the difference between the temperature of the refrigerant, discharged from the electronic expansion valve 21 and the temperature of the refrigerant after joining via the respective evaporators 12, is a preset targeted value. COPYRIGHT: (C)2008,JPO&INPIT
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