State estimation apparatus, method, and program recording medium
US11865483B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 26, 2018 |
| Grant date | Jan 9, 2024 |
| Priority date | — |
| Expiry date | Sep 5, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2700/15
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A state estimation apparatus acquires current information at a power supply part of a refrigeration/freezing facility, derives a degree of change in current information acquired at a state estimation practice time point and derives a degree of change with respect to at least one pair of pieces of current information out of current information acquired at a predetermined time interval before state estimation is practiced, determines whether or not cleaning of the filter of the refrigeration/freezing facility has been practiced, based on the degree of change with respect to at least one pair of pieces of the current information and the degree of change in the current information acquired at the state estimation practice time point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.