HVAC module with anti-backflow control and method of operation
US9879870B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2015 |
| Grant date | Jan 30, 2018 |
| Priority date | — |
| Expiry date | Jul 28, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60H2001/002
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
HVAC module has an air inlet, an evaporator downstream of the blower and a heater downstream of the evaporator, and a rear mixing zone downstream of the evaporator and the heater, wherein a control valve prevents cold air from flowing back towards the hot air by regulating the pressure of the cold air. A method is devised to control anti-backflow control valve of such an HVAC module by the steps of reading pressure and temperatures at various points in the HVAC module; setting air flow and temperature discharge targets; calculating the resistance of the control valve and a bland valve; determining corresponding control valve and blend valve positions; and moving the control valve and blend valve to those corresponding positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.