| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiation air-conditioning system which suppresses the degradation of radiation air-conditioning efficiency from ceiling material 2 and heat radiation loss to an upper floor due to a vertical temperature difference of a ceiling space S2, and has satisfactory efficiency.SOLUTION: A radiation air-conditioning system includes a ceiling space S2 hermetically demarcated via ceiling material 2 on the upper side of a living room space S1 and an air-conditioner 3 which takes-in air in the ceiling space S2 and supplies cooled or heated air-conditioned air to the ceiling space S2. Therein, a blowing port 31a of the air-conditioner 3 is opened downward and blows the air-conditioned air to the ceiling material 2. Therefore, particularly in the heating time of winter season, a vertical temperature difference in the ceiling space S2 is reduced and heat radiation loss to an upper floor is suppressed. Moreover by directly blowing the air-conditioned air to the ceiling material 2, the convection heat transfer rate between a lower layer part of the ceiling space S2 and the ceiling material 2 is made to be larger than the convection heat transfer rate between an upper layer part of the ceiling space S2 and the upper floor side, and a heat exchange amount with the living room space S1 side is increased. |
