| 摘要 |
PURPOSE:To reduce the amount of decorative board to be attached on a ceiling with a reduction in cost and an improvement of appearance of the ceiling, and prevent dust from blowing out from a dust collector filter of a suction port into a room. CONSTITUTION:An air outlet 13 is separated from a suction port 15 by a partition wall 11 with an opening 11a, and a circulation fan 12 is so located that its air delivery port faces the opening 11a. A space between the partition wall 11 and a heat exchanger 10 communicates with an air supply port 22c, and a space between the suction port 15 and the partition wall 11 communicates with an exhaust air inlet 21c of a ventilator 2. In addition, to prevent air supplied between the partition wall 11 and the heat exchanger 10 from flowing back to the air outlet 13 side, the opening 11a is shut by a damper 11b that is opened by the air flow of the circulation fan 12, or the circulation fan 12 itself capable of operating at a very low power. |
