State estimation apparatus, method, and program storage medium
US11358086B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 2018 |
| Grant date | Jun 14, 2022 |
| Priority date | — |
| Expiry date | Mar 30, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B23/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A state estimation apparatus includes: a current information acquisition part that acquires information about a current at a power supply part of a refrigerating/freezing apparatus; a current information storage part that holds current information in a normal state of the refrigerating/freezing apparatus; an evaluation part that derives a degree of change based on the acquired current information and the current information in the normal state of the refrigerating/freezing apparatus; a filter cleaning determination part that estimates a clogging state of a filter of the refrigerating/freezing apparatus based on the degree of change to determine whether cleaning of the filter is necessary; and an output part that provides, for a determination result indicating that the cleaning of the filter is necessary, an output to that effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.