High efficiency air conditioner condenser fan
US7014423B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2003 |
| Grant date | Mar 21, 2006 |
| Priority date | — |
| Expiry date | Mar 27, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F1/40
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
Novel twisted blades with an air foil for use with air conditioner condensers and heat pumps that provide improved airflow efficiency to minimize operating power requirements having an overall diameter across the blades being approximately 19 inches, and approximately 27.6 inches. The blades (AC-A) can run at approximately 840 rpm to produce approximately 2200 cfm of air flow using approximately 110 Watts of power from an 8-pole motor. Using an OEM 6-pole ⅛ hp motor produced approximately 2800 cfm with approximately 144 Watts of power while running the blades at approximately 1100 rpm. Power savings were 25% (50 W) over the conventional configuration. A second version of the fan (AC-B) with some refinements to the flow geometry produced a similar air flow while using only 131 W of power at 1100 rpm. Power savings were 32% (62 W) over the conventional configuration. Embodiments can include two, three, four and five blades equally spaced apart from one another about hubs. Additionally, a novel noise reduction configuration can include asymmetrically mounted blades such as five blades asymmetrically mounted about the hub. Short, conical diffusers were shown to further improve air movi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.