| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooler capable of efficiently and uniformly obtaining a cooling effect without increasing the evaporation temperature of an evaporator or delaying cooling speed when all evaporators are driven. SOLUTION: When all electromagnetic valves 19 (19a to 19c) are opened, a controller 22 judges whether the absolute valueΔTE of a difference between a maximum temperature and a minimum temperature in the evaporators 11 (11a to 11c) is more than a prescribed valueΔTEP or not. When the judged result isΔTE<ΔTEP, a 1st correction opening degreeθ1 is added to the opening degreeθof an electronic expansion valve 17, and at the time ofΔTE>=ΔTEP, an electromagnetic valve 19 corresponding to the evaporator 11 of the minimum temperature is closed, a 2nd correction opening degreeθ2 smaller than the 1st correction opening degreeθ1 is added to the apertureθand a refrigerant is allowed to flow into the evaporators 11 by the opening degreeθ.
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