| 摘要 |
PURPOSE:To dispense with heat insulating materials at an unit part by a method wherein in a ventilation unit a foam resin-made air flow passage body having respective flow passage parts for air charging, by-passing and exhausting is equipped, and also a selective damper for heat exchanging ventilation allowing air to flow through all heat exchanging elements and ordinary ventilation allowing air not to flow through the elements. CONSTITUTION:In a draft unit 21, an air charging flow passage part 7, an exhaust flow passage part 19, and the air flow passage 15 of a by-passing flow passage part 8 are constituted by foam resin. Then, in the part 19 a damper connected with a motor 13 is removably put in and the flow passage body 15 is interposed between fixed metal fittings 16 and fixed by a screw 17. Thereby, though an air flow passage 22 is for cold air and an exhaust flow passage 23 is for warm air, the body 15 is insulated because the body 15 is constituted of foam resin and even though the passages 22 and 23 are used for cold and warm air respectively, dew condensation does not occur. And, as the unit 21 is constituted in one body, it is possible to take out the total unit 21 after an inspection cover 24 is first removed and then the total heat exchanging elements 11 are removed at the inspection time of a motor 13, etc. |
