System and method for determining air purifier filter change time using measurement of motor speed
US8182579B2 · kind B2 · utility
36Cited by
10References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2009 |
| Grant date | May 22, 2012 |
| Priority date | — |
| Expiry date | Aug 6, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D46/46
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A system and a method are disclosed for changing a filter provided in an air purifier at an optimum time by measuring the rotational speed of a motor that operates the filter. The system for determining an air purifier filter change time includes: a motor speed measurement unit; a time counting unit; a speed determination unit; a time comparison unit; and a filter change time determination unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.