| 摘要 |
PURPOSE:To prevent air leakage and cut down the number of components by integrally forming each indoor and outdoor suction duct joint section with a fan casing for air supply and air discharge by means of forming resin respectively and penetrating a side board of a main body, and forming integrally each indoor and outdoor discharge duct joint section with a passage unit into one piece in the title device for housing service. CONSTITUTION:An exhaust fan casing 9, an indoor suction duct joint section 19, an supply fan casing 11, and an outdoor suction duct joint section 20 are integrally molded with foaming resin respectively. Then a passage unit 14 which holds a thermal conversion device 13 and subdivides into an exhaust passage 4 and an air supply passage 7 is integrally molded with an indoor discharge duct joint section 22 and an outdoor discharge duct joint section 23 by means of foaming resin into one piece. |
