AIR CONDITIONING SYSTEM

To provide an air conditioning system capable of achieving good responsive humidification while saving energy related to humidification of an ambient air.SOLUTION: An air conditioning system comprises: an outdoor conditioning unit 2 comprising an ambient air humidifier 2c and a cooler 2f, configured to enable performing switching among a humidification operation by the ambient air humidifier 2c, a dehumidification operation by the cooler 2f, and a dehumidification/non-dehumidification operation without humidification and dehumidification; an air conditioner 1 that adjusts the temperature of a mixed air of a return air A3 taken in from a target space S and an ambient air A0 taken in from the outdoor unit 2, and supplies the mixed air to the targe space S; and a vaporizing humidifier 13b which performs humidification of the air on the downstream side of the outdoor conditioning unit 2. The outdoor conditioning unit 2 performs the humidification operation when below a humidification upper limit value, and performs the dehumidification operation when exceeding a dehumidification lower limit value. The humidification upper limit value is set to a value lower than dehumidification lower limit value, and when the dehumidification/non-dehumidification operation is performed in the outdoor conditioning unit 2, humidification is performed by the vaporizing humidifier 13b as necessary.SELECTED DRAWING: Figure 1 【課題】外気の加湿に係るエネルギーを節減しつつ、反応性の良い加湿を実現し得る空調システムを提供する。【解決手段】外気加湿器２ｃと冷却器２ｆとを備え、外気加湿器２ｃによる加湿運転と、冷却器２ｆによる除湿運転と、加湿および除湿を行わない非加湿非除湿運転とを切り替えて実行可能に構成された外調機２と、対象空間Ｓから取り込んだ還気Ａ３と外調機２から取り込んだ外気Ａ０との混合空気の温度を調整して対象空間Ｓに供給する空調機１と、外調機２の下流側において空気に対し加湿を行う気化式の加湿器１３ｂとを備え、外調機２においてＬ加湿上限値を下回る場合に加湿運転を実行し、除湿下限値を上回る場合に除湿運転を実行し、前記加湿上限値は前記除湿下限値よりも低い値に設定され、外調機２において非加湿非除湿運転を行う際には、必要に応じて気化式の加湿器１３ｂで加湿を行う。【選択図】図１