System for detecting drainage flow obstructions in washing appliances
US11634853B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2020 |
| Grant date | Apr 25, 2023 |
| Priority date | — |
| Expiry date | Aug 28, 2040 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06F2105/58
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method of monitoring drainage of a washing appliance such as a dishwasher or washing machine having a pump for draining a washing chamber is disclosed. The method includes receiving a time series of power consumption data relating to the operation of the washing appliance over a monitored period of operation including pumped draining of the washing chamber. A measure of the duration of a portion of the monitored period comprising said pumped draining is derived from the time series of power consumption data. The measure of duration is then compared to a reference value and an indicator of a drainage condition is determined based on the comparison. The method may be used to detect scaling or blockages in drainage flow paths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.