HVAC fan

Patent metadata

Field	Value
Publication number	US-11187083-B2
Application number	US-201916405656-A
Country	US
Kind code	B2
Filing date	May 7, 2019
Priority date	May 7, 2019
Publication date	Nov 30, 2021
Grant date	Nov 30, 2021

Abstract

A fan for a climate control outdoor unit includes a plurality of airfoils located around a central hub. Each of the airfoils includes a leading edge and a trailing edge opposite the leading edge. A pressure side surface extends between the leading edge and the trailing edge. A suction side surface is opposite the pressure side surface and extends between the leading edge and the trailing edge. The leading edge includes a greatest negative deviation from a radial line of greater than 10% of a span of the airfoil. The greatest negative deviation is located at between 45% and 85% of the span of the airfoil.

First claim

What is claimed is:

1. A fan for a climate control outdoor unit comprising:
a plurality of airfoils located around a central hub, wherein each of the airfoils includes:
a leading edge;
a trailing edge opposite the leading edge;
a pressure side surface extending between the leading edge and the trailing edge; and
a suction side surface opposite the pressure side surface and extending between the leading edge and the trailing edge, wherein the leading edge includes a greatest negative deviation from a radial line of greater than 10% of a span of the airfoil and the greatest negative deviation is located at between 45% and 85% of the span of the airfoil.

2. The fan of claim 1 , wherein the greatest negative deviation from the radial line is greater than 15% of the span.

3. The fan of claim 2 , wherein the greatest negative deviation from the radial line is located at between 60% and 80% of the span.

4. The fan of claim 1 , wherein the airfoil at 0% of the span of the airfoil includes a negative deviation from the radial line of between 0% and 5% of the span of the airfoil.

5. The fan of claim 1 , wherein the greatest negative deviation defines a convex profile of the leading edge with respect to the pressure side surface and the leading edge includes a concave profile with respect to the pressure side surface located adjacent the central hub.

6. The fan of claim 5 , wherein the concave profile of the leading edge is centered at between 10% and 30% of the span of the airfoil.

7. The fan of claim 5 , wherein the leading edge includes a downstream extending concavity and an upstream extending concavity and the downstream extending concavity is located radially inward of the upstream extending concavity.

8. The fan of claim 7 , wherein an inflection point between the downstream extending concavity and the upstream extending concavity is located at between 15% and 50% of the span of the airfoil.

9. The fan of claim 1 , wherein the airfoil includes a tip fence extending between the leading edge and the trailing edge of the airfoil having a concave profile extending along the pressure side surface of the airfoil.

10. The fan of claim 1 , wherein a tip section located outward of 90% of the span of the airfoil includes a negative deviation of between 5% and 10% of the span from the radial line.

11. The fan of claim 1 , wherein the fan is a molded polymeric structure with the central hub and the central hub includes a socket keyed for mounting to a rotor shaft.

12. A fan housing assembly comprising:
a housing defining an inlet and a diffuser located fluidly downstream of the inlet;
a fan located within the fan housing and having a plurality of airfoils located around a central hub, wherein each of the airfoils includes:
a leading edge;
a trailing edge opposite the leading edge;
a pressure side surface extending between the leading edge and the trailing edge; and
a suction side surface opposite the pressure side surface and extending between the leading edge and the trailing edge, wherein the leading edge includes a greatest negative deviation from a radial line of greater than 10% of a span of the airfoil and the greatest negative deviation is located at between 45% and 85% of the span of the airfoil.

13. The assembly of claim 12 , wherein the diffuser is a diverging diffuser and the inlet includes a plurality of lobes fluidly upstream of the fan and separated by a corresponding recessed portion with the plurality of lobes and the corresponding recessed portion defining a leading edge of the inlet.

14. The assembly of claim 12 , further comprising a downstream extending concavity along the leading edge of the airfoil and an upstream extending concavity along the leading edge of the airfoil and the downstream extending concavity is located radially inward of the upstream extending concavity.

15. The assembly of claim 14 , wherein the greatest negative deviation from the radial line is greater than 15% of the span and a tip section located outward of 90% of the span of the airfoil includes a negative deviation of between 5% and 10% of the span from the radial line.

16. The assembly of claim 15 , wherein the greatest negative deviation from the radial line is located at between 60% and 80% of the span.

17. The assembly of claim 12 , wherein the airfoil at 0% the span of the airfoil includes a negative deviation from the radial line of between 0% and 5% of the span of the airfoil.

18. The assembly of claim 12 , wherein the greatest negative deviation defines a convex profile of the leading edge with respect to the pressure side surface and the leading edge includes a concave profile with respect to the pressure side surface located adjacent the central hub.

19. The assembly of claim 18 , wherein the concave profile of the leading edge is centered at between 10% and 30% of the span of the airfoil.

20. The assembly of claim 12 , wherein the airfoil includes a tip fence extending between the leading edge and the trailing edge of the airfoil having a concave profile extending along the pressure side surface of the airfoil.

21. The assembly of claim 12 , wherein a tip section located outward of 90% of the span of the airfoil includes a negative deviation of between 5% and 10% of the span from the radial line.

22. The assembly of claim 12 , wherein the fan is a molded polymeric structure with the central hub and the central hub includes a socket keyed for mounting to a rotor shaft.

Assignees

• Carrier Corp

Inventors

• Stauter Richie C
• Dygert Ryan K
• Zaki Mina Adel
• Asselin Daniel

Classifications

• F05D2240/306

  related to the suction side of a rotor blade · CPC title

• F04D29/666

  by means of rotor construction or layout, e.g. unequal distribution of blades or vanes · CPC title

• F24F1/38 Primary

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

• F04D25/12

  the unit being adapted for mounting in apertures · CPC title

• F04D29/384

  characterised by form · CPC title