Return fan control system and method
US8326464B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 29, 2008 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Aug 5, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F2110/40
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A return fan control system for an HVAC system comprises a supply fan control loop, a return fan control loop and a building pressure control system. The supply fan control loop comprises a duct pressure controller arranged to control a supply fan to a duct pressure setpoint. The return plenum pressure control loop comprises a return plenum pressure controller arranged to automatically control a return fan to a return plenum pressure setpoint determined by a setpoint reset function. The building pressure control system is operable to control a building pressure. The building pressure control system may comprise a building pressure control loop and an outside air control loop cooperatively arranged to control an exhaust damper in response to an outside air intake.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.