| 摘要 |
PROBLEM TO BE SOLVED: To determine frosting before a surface of a low-temperature side heat exchanger is covered with a large quantity of frost. SOLUTION: Frosting temperature is computed on the basis of the temperature and the relative humidity of the low-temperature side atmosphere to determine whether a surface of a second outdoor heat exchanger 3 as the low-temperature side heat exchanger is going to be covered with frost or not, and when probability of the generation of frost in the surface of the second outdoor heat exchanger 3 is determined, a flow rate of the refrigerant to be circulated is reduced to lower (save) the heat absorbing ability and heating ability of the vapor compression type refrigerator. With this structure, since frosting can be estimated before the surface of the low-temperature side heat exchanger is covered with a large quantity of frost and while frosting speed can be reduced, and frequency of defrosting operation can be reduced, while restricting remarkable deterioration of the heat absorbing efficiency, the operation efficiency of the vapor compression type refrigerator is improved. COPYRIGHT: (C)2004,JPO&NCIPI
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