Filter purge control for HVAC fixed air circulation system

Details Filter purge control for HVAC fixed air circulation system Filter purge control for HVAC fixed air circulation system

2008-03-04

2008-03-04

McAllister, Steven B. (Department: 3749)

Ventilation

Vehicle

Having inlet airway

C454S137000, C296S190090

Reexamination Certificate

active

07338357

ABSTRACT:
A fixed air circulation system for the cab enclosure of an off-highway vehicle is disclosed. Fresh air is introduced into the cab through a fresh air inlet having a fresh air filter therein. The air inlet leads, through a manifold or fresh air duct, to the inside of the operator's compartment. When a cab door is opened, a bypass valve to the conduit is opened. When the door is closed, the air pulse created in the cab is effective, through the bypass valve or normal openings with the blower off, to dislodge dust and dirt from the filter.

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