| 摘要 |
PROBLEM TO BE SOLVED: To easily replace compressors of different kinds without installing an implement such as a low voltage switch. SOLUTION: Temperatures are sensed by an outside air temperature sensor 44, an indoor temperature sensor 42, an outdoor heat exchanger temperature sensor 43, and an indoor heat exchanger temperature sensor 41, and signals of these temperatures are inputted, whereby a monitoring device 15 judges whether or not the amount of refrigerant fed to a compressor 11 is normal. In a cooling operation, for example, if it is judged that the differenceδT between the temperature of an outdoor heat exchanger 12 and that of the outside air temperature is smaller than a temperature difference Td set beforehand and if such state continues for a predetermined period of time, it is judged that the amount of refrigerant is not normal. Thus, even if a rotary compressor or the like is provided in a refrigeration circuit, it can be easily replaced with a scroll compressor. |
