Centrifugal blower, air conditioner, and refrigeration cycle apparatus
US11319961B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2016 |
| Grant date | May 3, 2022 |
| Priority date | — |
| Expiry date | Feb 11, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F1/40
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A centrifugal blower having high efficiency and reduced noise is provided. A centrifugal blower to be accommodated in a housing having an air inlet includes a spiral casing having a bell mouth and a centrifugal fan housed in the casing. The bell mouth includes a first region and a second region. The first region is disposed closest to the air inlet. A distance from a rotational axis of the centrifugal fan to a downstream end in the first region is greater than a distance from the rotational axis to the downstream end in the second region. A curvature of a surface of the first region in a cross section including the rotational axis is smaller than a curvature of a surface of the second region in a cross section including the rotational axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.