| 摘要 |
PURPOSE:To reduce noise in adjacent rooms, by closing an opening with the cover facing a partition in openings of return cover and preventing noise from spreading to the adjacent rooms through the roof space. CONSTITUTION:Rooms 4, 5 are separated by partitions 3. The openings P, Q with a cover, facing a partition 3 are closed in the openings of return cover 2 of an air-conditioning return opening 1 in respective rooms 4, 5. That is, even the sound of one 4 of rooms goes out from the air-conditioning return opening 1 to the ceiling, the openings P, Q with a cover, facing the partition 3 are closed and further, the openings P, Q with a cover facing the partition 3 of the adjacent room 5 are closed to prevent noises from spreading. At this time, the openings P, Q with covers, not facing the partition 3 of the air- conditioning return opening 1 are kept open. In this way, the return function of the air-conditioning return opening 1 is not damaged. |
