Patent ID: 7664378
Filing Date: 2010-02-16
Classification: F04D,F24H

Abstract:
1. A fan arrangement for a fan heater which comprises a heater body having an air inlet, and air outlet, and a receiving cavity to communicate between said air inlet and said air outlet, an electric unit having a driving shaft disposed in said heater body within said receiving cavity for electrically connecting to a power source, and a heating element, wherein said fan arrangement comprises: a plurality of fan assemblies each of which comprises a plurality of heater fan blades each having a top edge portion and a bottom edge portion, wherein each of said fan assemblies is mounted with said adjacent fan assembly to form an integral fan unit within said receiving cavity, wherein said fan unit is operatively coupled with said electric unit for being driven to rotate by said electric unit, wherein when said electric unit is activated to drive said fan unit to rotate and heat up said heat element at said elevated temperature, said fan assemblies are adapted to draw air flowing from said air inlet to said air outlet via said heating element, so as to heat up said air drawn by said fan unit, and deliver said heated air to a predetermined heating zone from said air outlet; a top mounting member; a bottom mounting member, wherein each of said top mounting member and said bottom mounting member has a plurality of the mounting slots indently formed on an inner surface of said respective top mounting member and said bottom mounting member, wherein said mounting slots are aligned with said corresponding heater fan blades of said uppermost and said bottommost fan assemblies respectively so as to mount said corresponding heater fan blades with said top mounting member and said bottom mounting member to form said fan unit having an integral structure; and a plurality of connecting members spacedly supported between said top mounting member and said bottom mounting member, wherein said top edge portion and said bottom edge portion of each of said heater fan blades are mounted with two of said corresponding connecting members, said top mounting member and said bottom mounting member respectively so as to securely attach with said corresponding adjacent fan assembly via said corresponding connecting member, wherein said fan assemblies are spacedly and securely attached on said corresponding connecting members for forming said fan unit of said fan arrangement, wherein each of said connecting members also has a plurality of said mounting slots formed on a top and a bottom sides of said connecting member, wherein each of said heater fan blades are adapted to insert and mount into said corresponding mounting slot for securely attaching thereon, wherein said mounting slots on said top side of said connecting member are not aligned with said mounting slots on said bottom side of said connecting member so as to minimize a thickness of said connecting member and maximize a connection strength between said heater fan blades and said corresponding connecting members.