Drain pump assembly for a washing machine appliance and methods of operating the same
US10947658B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2018 |
| Grant date | Mar 16, 2021 |
| Priority date | — |
| Expiry date | Mar 13, 2039 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06F2105/58
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A washing machine appliance and a method of selectively draining a sump of the washing machine appliance at the start of an operating cycle is provided. The method includes determining that the drain pump assembly has drained wash fluid from the sump, e.g., by checking to see whether an empty sump flag has been set in the controller. In addition, the method includes determining that a water supply valve has not been opened since the wash fluid was drained from the sump and that a sump pressure exceeds a predetermined threshold pressure, e.g., indicating that water is in sump that was not intentionally added by the water supply valve. The drain pump assembly is then operated to perform a drain cycle at the beginning of a subsequent operating cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.