| 摘要 |
<p>PROBLEM TO BE SOLVED: To suppress generation of drain water in an adsorption heat exchanger which becomes a condenser.SOLUTION: A control unit (30) controls a refrigerant circuit (10) and a passage control mechanism (20) so that a first humidification operation in which outside air (OA) is supplied to indoor space while being passed through a first adsorption heat exchanger (101) which becomes a condenser and a second humidification operation in which the outside air (OA) is supplied to the indoor space while being passed through a second adsorption heat exchanger (102) which becomes the condenser are executed alternately. Also, the control unit (30) controls rotational frequency of a compressor (100) so that humidity of indoor air (RA) becomes close to preset target humidity. Furthermore, the control unit (30) performs a condensation temperature control operation for increasing a lower limit value of the rotational frequency of the compressor (100) when a condensation temperature (TC) of the adsorption heat exchanger which becomes the condenser out of the first and the second adsorption heat exchangers (101, 102) is lower than a preset condensation temperature threshold value (TCth).</p> |
