Filter purge control for HVAC variable air circulation system
US7377848B2 · kind B2 · utility
13Cited by
24References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2006 |
| Grant date | May 27, 2008 |
| Priority date | — |
| Expiry date | Jul 12, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60H3/0633
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A variable air circulation system for the cab enclosure of an off-highway vehicle is disclosed and described. The system provides for adjustment of the ratio between fresh air circulation and recirculation of cab air. Fresh air is introduced into the cab through a fresh air inlet having a fresh air filter therein. The air inlet leads to a circulation conduit. When a cab door is opened, a valve to the conduit is opened. When the door is closed, the air pulse created in the cab is effective, through the valve, to dislodge dust and dirt from the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.