Air purifier, method for determining time to replace filter thereof, and device and method for determining filter replacement time pressure differential therefor
US10188976B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2014 |
| Grant date | Jan 29, 2019 |
| Priority date | — |
| Expiry date | Jun 2, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D46/42
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An air purifier according to the present disclosure includes: a memory for storing a flow rate/pressure differential correlation graph with regard to each filter utilization state; a pressure differential sensor for measuring a pressure differential, which is a difference in pressure between the front and rear ends of the filter; and a filter replacement time management unit for determining the time to replace the filter according to a result of matching a pressure differential of the filter, which is measured by the pressure differential sensor at a preset cycle, and the flow rate of air flowing into the filter during pressure differential measurement with the flow rate/pressure differential correlation graph for each utilization state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.