INDOOR AIR CONDITIONING SYSTEM

To provide an indoor air conditioning system capable of performing any one of a dehumidification operation, an air blowing operation and a heating operation in accordance with a temperature condition and a humidity condition and optimally maintaining an indoor temperature and humidity environment.SOLUTION: An indoor air conditioning system 10 performs any one of a dehumidification operation in which cooled and dehumidified air cooled and dehumidified by a two-coil type heat pump air conditioner indoor unit 16a by using heat exchanged at a cooling coil 31 is reheated by using heat exchanged at a heating coil 32, an air blowing operation that does not use the heat exchanged at the cooling coil and the heating coil and a heating operation that does not use the heat exchanged at the cooling coil and uses the heat exchanged at the heating coil. A one-coil type heat pump air conditioner indoor unit 17a performs a cooling operation using the heat exchanged at the cooling coil. While the one-coil type heat pump air conditioner indoor unit continues the cooling operation, the dehumidification operation, the air blowing operation and the heating operation of the two-coil type heat pump air conditioner indoor unit are switched in accordance with an indoor set temperature condition and set humidity condition.SELECTED DRAWING: Figure 1 【課題】温度条件および湿度条件に応じて除湿運転と送風運転と暖房運転とのいずれかを行うことができ、室内の温湿度環境を最適に保持することができる室内空調システムを提供する。【解決手段】室内空調システム１０では、２コイル式のヒートポンプエアコン室内機１６ａが冷却コイル３１の交換熱を使用して冷却除湿した冷却除湿空気を加熱コイル３２の交換熱を使用して再熱する除湿運転と、冷却コイルおよび加熱コイルの交換熱を使用しない送風運転と、冷却コイルの交換熱を使用せずに加熱コイルの交換熱を使用した暖房運転とのいずれかを行い、１コイル式のヒートポンプエアコン室内機１７ａが冷却コイルの交換熱を使用した冷房運転を行い、１コイル式のヒートポンプエアコン室内機が冷房運転を継続しつつ、室内の設定温度条件および設定湿度条件に応じて２コイル式のヒートポンプエアコン室内機の除湿運転と送風運転と暖房運転とが切り替わる。【選択図】図１