| 摘要 |
PURPOSE:To reduce running cost by a method wherein the air in a room is discharged through a draft shaft by a drafting force due to a temperature difference between indoor and the atmosphere, which is generated in the draft shaft, and an excessive pressure generated by the fan of an air-conditioning macine. CONSTITUTION:Air, heated in the room 3, enters into the draft shaft 2 through the suction port 8 of the draft 2. The air, to be drafted, is discharged from a drafting port 9, provided at the upper part of the draft shaft 2, through the chimney-like draft shaft having small ventilating resistance, by the drafting force due to the temperature difference between the indoor 3 and the atmosphere 4 and the excessive pressure upon ventilating air by the fan 10. At his time, a damper D1, provided in the draft shaft 2, is fully opened and the damper D2, provided in a ventilating duct 12, is closed, thereby discharging the whole amount of air discharged from the room 2. |
