| 摘要 |
PROBLEM TO BE SOLVED: To improve reliability of a compressor by reducing the number of revolutions of defrosting operation, in a refrigerating device having a plurality of outdoor heat exchangers. SOLUTION: Temperature sensors (31 and 32) are mounted on first and second heat exchangers (14 and 20). When the detecting temperature of the temperature sensor (31 or 32) is decreased to a value lower than a first given temperature, it is decided that frosting occurs. An electronic expansion valve (16 or 17) corresponding to the outdoor heat exchanger (14 or 20) to which frosting occurs is closed and a feed of a refrigerant is stopped with outdoor air fed to the outdoor heat exchanger (14 or 20). This constitution melts frost on the outdoor heat exchanger (14 or 20) with heating operation continued. |
