Water level detection system for a washing machine appliance and methods for operating the same
US11155954B2 · kind B2 · utility
0Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2019 |
| Grant date | Oct 26, 2021 |
| Priority date | — |
| Expiry date | Dec 31, 2039 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06F2105/08
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A washing machine appliance includes a sump for collecting wash fluid, a water supply valve for supplying wash fluid during a fill cycle, and a drain pump assembly for draining that wash fluid during a drain cycle. A controller is configured for monitoring the sump pressure using a water level detection system, detecting a fill sensing failure such as a slow pressure rise after the fill cycle, detecting a drain sensing failure such as a slow pressure drop during the drain cycle, and determining that the water level detection system is malfunctioning if the fill sensing failure and the drain sensing failure are detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.