Air-conditioning apparatus with dirt detection
US11204184B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 5, 2018 |
| Grant date | Dec 21, 2021 |
| Priority date | — |
| Expiry date | Apr 5, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/2614
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An air-conditioning apparatus includes: a suction-air temperature detection sensor that detects the temperature of air that is sucked into a heat exchange unit or the temperature of space to be subjected to heat exchange as a suction air temperature; a cooled/heated-air temperature detection sensor that detects the temperature of air blown from the heat exchange unit or the temperature of the heat exchange unit as a cooled/heated air temperature; and a control device, which includes a microcomputer or a hardware circuit. The control device acquires data on a temperature difference between the suction air temperature detected by the suction-air temperature detection sensor and the cooled/heated air temperature detected by the cooled/heated-air temperature detection sensor at different times as time-series data, and determines whether the heat exchange unit is dirty or not based on the time-series data regarding the temperature difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.