Detecting and handling a blocked condition in the coil
US10168067B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2015 |
| Grant date | Jan 1, 2019 |
| Priority date | — |
| Expiry date | Sep 19, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2700/11
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A heating, ventilation, and air-conditioning (HVAC) system comprises an outdoor unit with a fan and a coil, and a controller communicatively coupled to the fan and coil. The controller is operable to receive feedback data from the fan, where the feedback data from the fan corresponds to a power and a speed of the fan. The controller is further operable to store a fan model and a plurality of thresholds and determine a virtual sensor measurement, based at least in part upon the feedback data from the fan and the fan model. The controller is operable to determine that the virtual sensor measurement is greater than a frost threshold or a fouling threshold. The controller is finally operable to, in response to determining that the pressure difference is greater than the frost threshold or the fouling threshold, determine a blocked condition on the coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.