| 摘要 |
<p>The present invention addresses the problem of providing an air conditioner that uses R32 as a refrigerant and that can reduce the load on a compressor, and a method for operating an air conditioner. Provided is an air conditioner (1), having: a refrigeration cycle in which at least a compressor (14), an outdoor heat exchanger (11), an indoor heat exchanger (21), an outdoor expansion valve (13), and an indoor expansion valve (23) are connected, and refrigerant containing 70 wt% or more of R32 is circulated; and a controller (1a). An upper limit, which regulates the pressure ratio of the compressor (14) so that the dryness fraction of the refrigerant in the intake side of the compressor (14) during operation is higher than 0.85, is set so as to decrease as the intake pressure of refrigerant in the compressor (14) increases. A method for operating the air conditioner (1) is also provided. When the air conditioner (1) is operating, the controller (1a) has the characteristic of adjusting the rotational speed of the compressor (14) so that the pressure ratio is less than the upper limit.</p> |
