| 摘要 |
<p>An air conditioner capable of always exhibiting necessary heating capacity by using a supercritical coolant. In a heating mode, the air conditioner (1) allows an indoor heat exchanger (16) to dissipate heat from the supercritical coolant to the air. A control unit (4) maintains the high-pressure side pressure of the cooling cycle including the indoor heat exchanger (16) constantly. The controller (4) allows an outlet temperature sensor (41) to detect the coolant outlet temperature Tgc of the indoor heat exchanger (16) and a room temperature sensor (42) to detect the room temperature Ta. The controller (4) increases/decreases the target value of the high-pressure side pressure when it judges that the capacity is insufficient in view of the room temperature Ta of the room to be heated even if the coolant outlet temperature Tgc of the indoor heat exchanger (16) in the heating mode reaches the target value Tgcs.</p> |
