| 摘要 |
PURPOSE:To reduce the total thickness of a heat-exchanging ventilator using a counter-flow type heat exchanger in a double-tubular structure, and disposing a centrifugal fan respectively on the inside of an inner-tube wall and on the outside of an outer-tube wall. CONSTITUTION:When an exhaust and a suction fans 24, 25 are driven by a motor 23, air in a room is drawn from an inlet port 6 of an ornamental hood 7 by the exhaust fan 24 as shown by an arrow C in the drawing and then discharged from an outlet port 4 of an outer casing 3 to the outside B of the room via a first passage 15 formed in the body 11 of a heat exchanger. On the other hand, open air is drawn from an inlet port 5 into a second passage 16 by the suction fan 25 as shown by an arrow D and then supplied into the room from an outlet port 8 of the ornamental hood 7. During the above process, heat exchange is performed through heat-exchanging walls 14 between the indoor air and open air flowing in opposite directions to each other respectively in the first and second passages 15, 16 disposed adjacent to each other, so that heated open air is supplied into the room A. |
