| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioner in which a dehumidifying capability can be controlled in a fine manner while it is changed over in multi-stage and its performance and cost are well balanced. SOLUTION: One refrigerant flow passage of an indoor heat exchanger 5 is provided with an opening or closing valve 12, the opening or closing valve is controlled for its opening or closing in response to a temperature difference (Tr-Tc) of an indoor temperature (Tr) and a set temperature (Tc) and then a throttle amount of an expansion valve 3 is controlled in such a way that a temperature difference (Te-Ts2) between a temperature (Te) at an outlet of the expansion valve 3 and a temperature (Ts2) at an intermediate section of the indoor heat exchanger may become a predetermined reference value. With such an arrangement as above, liquid phase of refrigerant flowing in the indoor heat exchanger is variably controlled to enable a dehumidifying capability to be changed over to three-steps. In addition, an auxiliary heat exchanging section 5a and a temperature sensor 10 installed at an outlet of the auxiliary heat exchanging section are added to enable the dehumidifying capability to be changed over in five steps and a fine humidity control can be carried out. |
