Patent ID: 6019678
Filing Date: 2000-02-01
Classification: F04D,F24F

Abstract:
A ventilation fan for duct comprising:(a) a ventilation fan main body having(1) a blower including a fan installed inside, an intake port formed at the lower side, and a scroll having an exhaust port, and(2) a wind tunnel installed at said intake port side of said blower, and having a curved portion rotatable along the brim of an opening formed in a ceiling,(b) an adapter for duct connection detachably fitted to said exhaust port, and(c) a decorative plate which may be installed by covering the lower surface of said wind tunnel,whereby as said curved portion of said wind tunnel rotates along said brim of said opening, said ventilation fan main body is fitted to said ceiling, and said decorative plate is fitted to the lower side by covering said wind tunnel.