| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide air conditioning equipment which prevents the occurrence of refrigerant noise upon recovery of heating operation.SOLUTION: Air conditioning equipment (1) includes a refrigerant circuit (20) which is constituted by connecting a compressor (21), a four-way switching valve (22), an outdoor heat exchanger (23), an expansion valve (24) and an indoor heat exchanger (25), and fills R32 as refrigerant thereinto such that a heating operation and a defrosting operation for defrosting the outdoor heat exchanger (23) can be switched by the four-way switching valve (22). In the air conditioning equipment (1), such a liquid suppression control as to suppress inflow of liquid refrigerant from the outdoor heat exchanger (23) to the indoor heat exchanger (25) is performed by wholly closing the expansion valve (24) or making the opening of the expansion valve (24) smaller than that upon the defrosting operation from the end of the defrosting operation to the recovery of the heating operation by switching the four-way switching valve (22).</p> |
