Centrifugal blower wheel with an upwardly extending, smoothly contoured hub
AssigneeHoneywell Consumer Products, Inc.
InventorJui-Shang Wang
Life of this patent
Estimating the term…
Abstract
A centrifugal blower wheel having an indivisible prime number of peripherally spaced blades projecting upwardly from the top surface of a generally annular-shaped base plate. Each blade includes a tapered portion extending along an inside edge of the blade to approximately 1/3 to 1/2 the length of the blade. A hub is centrally located on the top surface of the base plate and surrounded by the inside edges of the blades, the hub curving upwardly from the top surface of the base plate to form a smoothly contoured curve.
Claims34
A centrifugal blower wheel having a height and a radius, comprising:
- (a) a generally annular-shaped base plate having a top and bottom surface;
- (b) a plurality of uniformly spaced fan blades mounted on the perimeter of the top surface of the base plate, the fan blades projecting upwardly from the top surface of the base plate;
- (c) a hub centrally located on the top surface of the base plate and surrounded by the blades, the hub curving upwardly from the top surface of the base plate to form a smoothly contoured curve defined by the formula:
- y=(2H/R.sup.3)x.sup.3 -(3H/R.sup.2)x.sup.2 +H
- where H is the height of the blower wheel and R is the radius of the blower wheel.
A cylindrical blower wheel comprising:
- (a) a generally annular-shaped base plate having a top and bottom surface;
- (b) a first set of uniformly spaced fan blades mounted on the perimeter of the top surface of the base plate, the first set of blades projecting upwardly from the top surface of the base plate from a proximal end of the blades to a distal end thereof;
- (c) a hub centrally located on the top surface of the base plate and surrounded by the first set of blades, the hub curving upwardly from the top surface of the base plate to form a smoothly contoured curve defined by the formula:
- y=(2H.sub.1 /R.sub.1.sup.3)x.sup.3 -(3H.sub.1 /R.sub.1.sup.2)x.sup.2 +H.sub.1
- where H.sub.1 is a distance between the top surface of the base plate and the distal end of the first set of blades and R.sub.1 is a radius of the blower wheel.
A dual inlet centrifugal blower wheel, comprising:
- (a) a generally annular-shaped base plate having a top and bottom surface;
- (b) a first set of peripherally spaced fan blades mounted on and projecting upwardly from the top surface of the base plate, the first set of blades having a proximal end mounted to the top surface and a distal end opposite thereto, the proximal and distal ends defming a length of the first set of blades, each of the first set of blades having a tapered portion extending along an inside edge of each blade to approximately 1/3 to 1/2 the length of the first set of blades;
- (c) a second set of peripherally spaced fan blades mounted on and projecting downwardly from the bottom surface of the base plate;
- and
- (d) a hub centrally located on the top surface of the base plate and surrounded by the inside edges of the first set of blades, the hub curving upwardly from the top surface of the base plate to form a smoothly contoured curve defined by the formula:
- y=(2H.sub.1 /R.sub.1.sup.3)x.sup.3 -(3H.sub.1 /R.sub.1.sup.2)x.sup.2 +H.sub.1
- where H.sub.1 is the length of the first set of blades and R.sub.1 is a radius of the blower wheel.
Dependencies are inferred from the claim text.