Ventilation fan

• US 6,435,964 B1
• Filed: 09/06/2001
• Issued: 08/20/2002
• Est. Priority Date: 09/06/2001
• Status: Expired due to Fees

• Current Assignee: Enlight Corporation
• Original Assignee: Enlight Corporation
• Inventors: Chang, Hsin Chung
• Primary Examiner(s): Joyce, Harold
• Application Number:
  US09/946,481
• Time in Patent Office: 348 Days
• Field of Search: 454/341, 454/346, 454/349, 454/352, 454/353, 454/354, 454/355
• US Class Current: 454/349
• CPC Class Codes: F24F 7/06 with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit

Abstract

A ventilation fan includes a case-like frame having an opening and a rib in the opening, a motor fastened to the rib inside the case-like frame, a face cover detachably covered on the case-like frame, the face cover having air inlets in communication with the opening of the case-like frame, a centrifugal fan fastened to. the motor shaft of the motor and disposed outside the case-like frame, and a wind box detachably covered on the outside of the case-like frame over the centrifugal fan.

Claims

1. A ventilation fan comprising a housing, a motor, a centrifugal fan, and a face cover, wherein

said housing is comprised of a rectangular case-like frame and a wind box, said case-like frame comprising an opening through top and bottom sides thereof, a rib extended across the center of said opening and adapted to hold said motor inside said case-like frame in such a position that the motor shaft of the motor extends over the top side of said case-like frame for the mounting of said centrifugal fan;

two elongated slots disposed on the top side of said case-like frame, and a plurality of retaining holes, said wind box being a whirl pool chamber covered on the top side of said case-like frame over said centrifugal fan, said wind box comprising a plurality of border hooks respectively fastened to the retaining holes of said case-like frame, an air output port for output of air, and a valve flap hinged to said air output port to let air pass through said air output port to the outside of said wind box and to prohibit outside air from passing through said air output port to the inside of said wind box;

said face cover is covered on said the bottom side of case-like frame over said motor, comprising two coupling flanges respectively fastened to the elongated slots of said case-like frame, and a plurality of air inlets in air communication with said opening of said case-like frame.