Refrigeration and air-conditioning apparatus
US9239180B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2010 |
| Grant date | Jan 19, 2016 |
| Priority date | — |
| Expiry date | Oct 4, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2700/04
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
When an operating state indicated by a set of operation data measured during normal operation becomes a state satisfying an operation data obtaining condition, the set of operation data at the time is obtained as a set of operation data for initial learning, and an inner volume of a refrigerant extension piping is calculated based on the obtained set of operation data for initial learning. A total amount of refrigerant in a refrigerant circuit 10 is calculated based on the calculated inner volume of the refrigerant extension piping and the current set of operation data, and the calculated total refrigerant is compared with a reference amount of refrigerant to determine a presence or absence of refrigerant leakage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.