Wind wheel and fan comprising the same

This application is a continuation-in-part of International Patent Application No. PCT/CN2019/076279 with an international filing date of Feb. 27, 2019, designating the United States, now pending, and further claims foreign priority benefits to Chinese Patent Application No. 201821429072.8 filed Sep. 1, 2018. The contents of all of the aforementioned applications, including any intervening amendments thereto, are incorporated herein by reference. Inquiries from the public to applicants or assignees concerning this document or the related applications should be directed to: Matthias Scholl P C., Attn.: Dr. Matthias Scholl Esq., 245 First Street, 18th Floor, Cambridge, Mass. 02142.

The disclosure relates to a wind wheel and a fan comprising the wind wheel.

Conventionally, a wind wheel includes a plurality of blades and a hub. The plurality of blades each includes an inner edge and an outer edge with respect to the hub, a leading edge, and a trailing edge. The inner edge is directly connected to the hub. The inner edge, the outer edge, the leading edge, and the trailing edge are connected sequentially to each other to form a pressure surface and a suction surface of each blade. Every two adjacent blades form an air duct. The shape and the radial length of the blades and the deflection angle of the pressure surface with respect to the end face of the hub all affect the air volume of the air duct.

Provided is a wind wheel comprising a plurality of blades and a hub. The plurality of blades each comprises an inner edge and an outer edge with respect to the hub, a leading edge, and a trailing edge; and the inner edge is directly connected to the hub; the inner edge, the outer edge, the leading edge, and the trailing edge are connected sequentially to each other to form a pressure surface and a suction surface of each blade; in a top view of the orthographic projection of the wind wheel, the maximum distance between the center O of the hub and the outer edge of one of the plurality of blades refers to an outer diameter R of the plurality of blades; the distance between the center O of the hub and the cross point A 1 of the inner edge and the leading edge is named R 1 ; the outer edge is connected to the leading edge via an arc; the distance between the center O of the hub and a joint A 2 of the arc and the leading edge is named R 2 ; and the distance R 1 , R 2 , and the outer diameter R satisfy the following conditions: 0.35R≤R 1 ≤0.45R; 0.8R≤R 2 ≤0.9R.

The distance R 2 and the outer diameter R satisfy the following conditions: 0.85R≤R 2 ≤0.87R; make a circle with the center O as a center and the distance R 2 as a radius, the cross point of the circle and the trailing edge is named A 3 , the included angle α between the line OA 2 and the line OA 3 satisfies the following condition: 65°≤α≤66°; and the longest connection segment A 2 A 3 on the blade is along the circumference of the circle.

The cross point of the trailing edge and the inner edge is named A 4 , the included angle β between the line OA 1 and the line OA 4 satisfies the following condition: 61.5°≤β≤62.5°.

The included angle γ between the line OA 1 and the line OA 2 satisfies the following condition: 29.5°≤γ≤30.5°.

In the pressure surface, the included angle δ between the connection line of the cross point A 1 and the cross point A 2 and the end face of the hub satisfies the following condition: 16°≤δ≤17.2°.

The plurality of blades is four in number.

Also provided is a fan comprising: a motor, the aforesaid wind wheel, a current collector, and a mesh enclosure; the wind wheel, the current collector, and the mesh enclosure are disposed on the motor.

The wind wheel has improved structural parameters, and can produce much more air speed and wind power than conventional products.

FIG. 1 is a schematic diagram of a wind wheel according to one embodiment of the disclosure;

FIG. 2 is a top view of a wind wheel according to one embodiment of the disclosure;

FIG. 3 is a front view of a wind wheel according to one embodiment of the disclosure;

FIG. 4 is a stereogram of a wind wheel according to one embodiment of the disclosure;

FIG. 5 is a sectional view taken from line B-B in FIG. 4 ; and

FIG. 6 is a schematic diagram of a wind wheel according to another embodiment of the disclosure.

To further illustrate, embodiments detailing a wind wheel and a motor comprising the same are described below. It should be noted that the following embodiments are intended to describe and not to limit the disclosure.

As shown in FIGS. 1-5 , a wind wheel comprises a hub 2 and a plurality of blades 1 . The plurality of blades 1 each comprises an inner edge 13 and an outer edge 14 with respect to the hub, a leading edge 15 , and a trailing edge 16 ; and the inner edge is directly connected to the hub 2 ; the inner edge 13 , the outer edge 14 , the leading edge 15 , and the trailing edge 16 are connected sequentially to each other to form a pressure surface 11 and a suction surface 12 of each blade. Every two adjacent blades form an air duct 31 .

In a top view of the orthographic projection of the wind wheel, the maximum distance between the center O of the hub 2 and the outer edge 14 of one of the plurality of blades 1 refers to the outer diameter R of the plurality of blades 1 ; the distance between the center O of the hub 2 and the cross point A 1 of the inner edge 13 and the leading edge 15 is named R 1 ; the outer edge 14 is connected to the leading edge 15 via an arc 17 ; the distance between the center O of the hub 2 and a joint A 2 of the arc 17 and the leading edge 15 is named R 2 ; and the distance R 1 , R 2 , and the outer diameter R satisfy the following conditions: 0.35R≤R 1 ≤0.45R; 0.8R≤R 2 ≤0.9R.

The distance R 2 and the outer diameter R satisfy the following conditions: 0.85R≤R 2 ≤0.87R; make a circle 18 with the center O as a center and the distance R 2 as a radius, the cross point of the circle 18 and the trailing edge 16 is named A 3 , the included angle α between the line OA 2 and the line OA 3 satisfies the following condition: 65°≤α≤66°; and the longest connection segment A 2 A 3 on the blade 1 is along the circumference of the circle 18 .

The cross point of the trailing edge 16 and the inner edge 13 is named A 4 , the included angle β between the line OA 1 and the line OA 4 satisfies the following condition: 61.5°≤β≤62.5°.

The included angle γ between the line OA 1 and the line OA 2 satisfies the following condition: 29.5°≤γ≤30.5°.

In the pressure surface 11 , the included angle δ between the connection line of the cross point A 1 and the cross point A 2 and the end face of the hub 2 satisfies the following condition: 16°≤δ≤17.2°.

The plurality of blades 1 is four in number.

As shown in FIG. 6 , a fan comprises a motor 4 , a wind wheel 3 in Example 1, a current collector 5 , and a mesh enclosure 6 , and the wind wheel 3 , the current collector 5 , and the mesh enclosure 6 are disposed on the motor 4 .

It will be obvious to those skilled in the art that changes and modifications may be made, and therefore, the aim in the appended claims is to cover all such changes and modifications.