| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioner capable of accurately determining a degree of the shortage of a refrigerant.SOLUTION: The air conditioner has a refrigerant circuit constituted by annularly connecting a compressor 15, a four-way valve 16, an outdoor-side heat exchanger 17, a decompression expansion valve 18, and an indoor-side heat exchanger 19, an indoor air blower 20 and a storing device 26. A number of revolutions of the compressor 15 is controlled so that a temperature difference between an indoor temperature and a supplied-air temperature reaches a prescribed value while operating the indoor air blower 20 at a prescribed number of revolutions, the number of revolutions of the compressor 15 is stored in the storing device 26, and the degree of the shortage of the refrigerant is determined by comparing the number of revolutions of the compressor 15 with that of the last operation in the prescribed number of times of operations. As the more the shortage of the refrigerant is, the higher the number of revolutions of the compressor 15 is, the shortage of the refrigerant can be determined when the number of revolutions of the compressor 15 is higher than the value of the last time as a result of the comparison of the number of revolutions of the last operation and the number of revolutions of the compressor 15 in the prescribed number of times of operations. |
