Air purifier device
US6951582B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Nov 4, 2004 |
| Grant date | Oct 4, 2005 |
| Priority date | — |
| Expiry date | Nov 4, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03C3/72
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An air purifier device includes a fan unit in an electrically conductive housing for drawing ambient air into the housing via an air inlet, and an electrically conductive dust-collecting member in the housing and disposed adjacent to an air outlet. A detecting unit is operable so as to provide a control signal in response to at least one of a change in electrical characteristics of the housing due to body contact therewith, and a change in electrical characteristics of the dust-collecting member due to excessive accumulation of dust thereon. A power control unit is operable to supply electric power to a negative ion generating unit such that a drive voltage is applied to an ionizing member of the negative ion generating unit, and is responsive to the control signal from the detecting unit to interrupt supply of the electric power to the negative ion generating unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.