HVAC system and method for conditioning air
US6755035B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2003 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Feb 20, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2600/0251
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
Outside air is treated to remove moisture before it enters the conditioned air space of a store or other building containing refrigeration furniture. The sensible air temperature and relative humidity measurements are taken to allow microprocessor calculations of the wet bulb temperature. A pair of unequal sized compressors of the HVAC system are then cycled in stages for peak efficiency and minimum compressor horsepower usage for low cost operation and minimal energy consumption both of the HVAC system and the refrigeration furniture. The wet bulb temperature is converged by the microprocessor which iterates a known polynomial approximately every 6 seconds to derive the wet bulb temperature. A time delay circuitry set at approximately 30 minutes prevents unnecessary staging of the compressors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.