Control system and method for multi-stage heating and cooling system with minimum on time and off time
US9494953B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2013 |
| Grant date | Nov 15, 2016 |
| Priority date | — |
| Expiry date | Dec 20, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F2110/10
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A system and method are provided for activating and deactivating heating or cooling stages of a heating, ventilating, and air conditioning (HVAC) unit, which includes activating a heating or cooling stage of the HVAC unit based on a determined need for heating or cooling. A monitored temperature is compared with a first temperature setpoint and a monitored on-time of the heating or cooling stage is compared with a first time period setpoint. The heating or cooling stage is deactivated based on the comparison of the monitored temperature with the first temperature setpoint, when the monitored on-time is greater than the first time period setpoint. The monitored temperature is then compared with a second temperature setpoint. The heating or cooling stage is reactivated based on a comparison of the monitored temperature with the second temperature setpoint, when a monitored off-time is greater than the second time period setpoint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.