Method for cleaning the filters of a vacuum cleaner and vacuum cleaner for carrying out said method
US7867304B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2007 |
| Grant date | Jan 11, 2011 |
| Priority date | — |
| Expiry date | Jan 27, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/03
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a method for cleaning the filter of a vacuum cleaner which has a dirt collecting container with a suction inlet, to which a suction tube is connected, the dirt collecting container being connected to at least one suction unit via at least one filter and at least one suction line, and at least one closing valve closing an external air inlet, via which the suction line is connected to an external air supply, in which method, for cleaning the filter, the closing valve is opened and the side of the filter that is oriented away from the dirt collecting container is impinged upon by external air. To develop the method further in such a way that all the filters present can be flowed through by suction air during suction operation, but suction operation does not have to be noticeably interrupted for filter cleaning, it is proposed according to the invention that, by opening the closing valve, the negative pressure that forms within the suction tube at a distance of 3 cm from the suction inlet, on connecting a standard suction tube, is lowered for at least 10 ms and at most 150 ms to values of less than 40% of the value forming when the closing valves are closed. Th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.