Blower fan and air conditioner having same

Patent metadata

Field	Value
Publication number	US-11041506-B2
Application number	US-201615780221-A
Country	US
Kind code	B2
Filing date	Nov 4, 2016
Priority date	Nov 30, 2015
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

Disclosed are: a blower fan capable of reducing noise and power consumption; and an air conditioner having the same. The present device comprises: a hub connected to a driving member so as to receive rotating power; and a plurality of wings radially arranged along the circumference of the hub, wherein the plurality of wings can comprise: uneven parts formed at trailing edges, which are the rear edge portions of each wing, with respect to the rotational direction thereof; and tail wing parts formed on the outer sides of the uneven parts so as to have convex parts protruding farther than the uneven parts.

First claim

The invention claimed is:

1. A blower fan comprising:
a hub coupled to a driving member and configured to receive rotation force; and
a plurality of wings radially arranged along a circumference of the hub,
wherein each of the plurality of wings includes:
a trailing edge at a rear edge portion of a wing with respect to a rotational direction thereof,
an uneven part formed at the trailing edge and including a plurality of protruding portions protruding from a surface of the trailing edge and a plurality of recessed portions recessed from the surface of the trailing edge, wherein the plurality of protruding portions and the plurality of recessed portions have a symmetrical shape with each other with respect to the surface of the trailing edge, and
a tail wing part having a convex portion which is formed on an outer side of the uneven part and protrudes farther than the uneven part.

2. The blower fan according to claim 1 , wherein:
a maximum straight distance (D) is from a center (C) of the hub to an end portion of the wing, and
a position P 1 of the tail wing part is located in a section based on 0.85*D≤P 1 ≤D.

3. The blower fan according to claim 2 , wherein a position P 2 of the uneven part is located in the section based on 0.5*D≤P 2 ≤0.9*D.

4. The blower fan according to claim 3 , wherein the uneven part is located from an inner end of the tail wing part toward the center (C) of the hub by an interval of 0.01*D or less.

5. The blower fan according to claim 1 , wherein the tail wing part has an inclined portion that is coupled to an inner side of the convex portion and is arranged to be inclined upward toward the convex portion.

6. The blower fan according to claim 1 , wherein a protruding portion of the uneven part which protrudes from a surface of the trailing edge and a recessed portion of the uneven part which is recessed from the surface of the trailing edge are alternately arranged and the recessed portion is located closest to the convex portion.

7. The blower fan according to claim 6 , wherein the protruding portion has a convex shape to have a preset curvature.

8. The blower fan according to claim 6 , wherein the protruding portion has a polygonal shape.

9. The blower fan according to claim 1 , wherein the convex portion has a convex shape to have a preset curvature and protrudes backward farther than the uneven part with respect to the rotational direction.

10. The blower fan according to claim 2 , wherein an outer end of the tail wing part is located in the end portion of the wing.

11. An air conditioner comprising:
a blower fan configured to cool a refrigerant,
wherein the blower fan has a plurality of wings, and
wherein each of the plurality of wings includes:
a trailing edge at a rear edge portion of a wing with respect to a rotational direction thereof,
an uneven part formed at the trailing edge and including a plurality of protruding portions protruding from a surface of the trailing edge and a plurality of recessed portions recessed from the surface of the trailing edge, wherein the plurality of protruding portions and the plurality of recessed portions have a symmetrical shape with each other with respect to the trailing edge; and
a convex portion formed on an outer side of the uneven part and having a preset curvature to protrude backward farther than the uneven part with respect to the rotational direction.

12. The air conditioner according to claim 11 , wherein the wing further includes a tail wing part formed in an end portion of the trailing edge of the wing and the convex portion is provided in the tail wing part.

13. The air conditioner according to claim 12 , wherein:
the blower fan further includes a hub coupled to a driving shaft and configured to receive rotation force,
the plurality of wings are arranged along a circumference of the hub,
a maximum straight distance (D) is from a center (C) of the hub to an end portion of the wing, and
a position P 1 of the tail wing part is located in a section based on 0.85*D≤P 1 ≤D.

14. The air conditioner according to claim 13 , wherein a position P 2 of the uneven part is located in a section 0.5*D≤P 2 ≤0.9*D.

15. The air conditioner according to claim 14 , wherein the uneven part is located from an inner end of the tail wing part toward the center (C) of the hub by a section of 0.01*D or less.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Byung-Ghun
• Jang Keun-Jeong
• Seo Yong-Ho
• Seo Hyeong-Joon
• Jo Eun-Sung

Classifications

• F05D2240/307

  related to the tip of a rotor blade · CPC title

• F05D2240/304

  related to the trailing edge of a rotor blade · CPC title

• F04D29/384 Primary

  characterised by form · CPC title

• F04D29/325

  for axial flow fans (blade mountings F04D29/34, blades F04D29/38) · CPC title

• F24F1/38

  Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings · CPC title