| 摘要 |
PURPOSE:To enable to easily convert to an underfloor blasting system by a structure wherein the conditioned air past through a heat exchanger, which is connected through a duct to the blow-off port of a direct blow-off air conditioner, is blown-off from the openings opened in the floor through an underfloor blast passage. CONSTITUTION:The blow-off port of the direct blow-off air conditioner 4 is connected through a primary connecting duct 12 to the primary inflowing port of the heat exchanger 13 in a building, in which the direct blow-off air conditioner 4 is installed in a room 1 equipped with electronic computing equipments 2 and 3 as heat load apparatuses. The primary outflowing port of the heat exchanger 13 is communicated through the underfloor blast passage 16 of the room 1 to blow-off ports 17-19 in the room 1. On the other hand, the secondary inflowing port of the heat exchanger 13 is connected to a secondary suction duct 22, which is connected through a change-over value 23 to an indoor suction port 24 or to a fresh air suction port 25, while the secondary outflowing port is connected to a secondary exhaust duct 27, being connected through a change-over valve 28 to an indoor blow-off port 29 or to an outdoor exhaust port 30. |
