Frost detection in HVACandR systems
US10488099B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2018 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | Aug 12, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2700/21171
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A frost monitor for HVAC&R systems detects efficiency degradations indicative of coil icing or frosting conditions by modeling compressor input power. The model uses temperature and compressor input power parameter measurements to predict expected compressor input power parameter values. Efficiency degradations are detected by comparing compressor power or current as predicted by the model against measured power or current. Deviations of the measured power parameter values from the predicted power parameter values by a predefined threshold reflect efficiency degradations that may be due to ice or frost accumulation on system coils. Such efficiency degradations may then be used to initiate a defrost cycle in the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.