| 摘要 |
PROBLEM TO BE SOLVED: To obtain an air conditioner capable of having large cooling capacity by reducing a target value of an evaporator outlet overheat degree during an operation of a refrigerant pump cycle.SOLUTION: An air conditioner includes: a compressor for performing a compression type refrigeration cycle operation for compressing and circulating a refrigerant; a condenser for condensing the refrigerant compressed by the compressor; an expansion valve for expanding the refrigerant condensed by the condenser; an evaporator for evaporating the refrigerant expanded by the expansion valve; and a refrigerant pump for performing a refrigerant pump cycle operation for circulating the refrigerant condensed by the condenser in a state where the compressor is stopped. Also, when an overheat degree on an evaporator outlet side during the refrigerant pump cycle operation is out of a range of a predetermined target value of SHto SHdetermined beforehand, and larger than a threshold value SH, which is larger than the target value, determined beforehand, a refrigerant circulation amount is adjusted by controlling rotational frequency of the refrigerant pump. |
