Partial recirculation vehicle HVAC system
AssigneeDENSO International America, Inc.
InventorRaymond Bailey
Life of this patent
Estimating the term…
Abstract
A blower unit for a vehicle heating, venting, and air conditioning (HVAC) unit is disclosed. The blower unit includes a case member that defines at least one exterior air intake aperture and at least one interior air intake aperture. The blower unit also includes a sealing member, a first door, and a second door. The first and second doors can move independent of each other. The first and second doors can be positioned in a mixture position to allow air flow into the blower unit through both the exterior and interior air intake apertures. The first door, in the mixture position, is sealed against the sealing member. As such, the first door and the sealing member cooperate to reduce air flow out of the blower unit through the interior air intake aperture.
Claims12
A blower unit for a vehicle heating, venting, and air conditioning unit comprising:
- a case member defining at least one exterior air intake aperture, at least one interior air intake aperture and a lower opening in communication with the at least one exterior intake aperture and the at least one interior air intake aperture;
- a first door disposed between the lower opening and the at least one exterior air intake aperture and between the lower opening and the at least one interior air intake aperture;
- a second door disposed between the lower opening and the at least one exterior air intake aperture and between the lower opening and the at least one interior air intake aperture;
- and
- a sealing member fixedly attached to the case member at a position between the lower opening and the at least one exterior air intake aperture and between the lower opening and the at least one interior air intake aperture, the first and second doors movable with respect to the sealing member, the sealing member portioning the lower opening into a first portion and a second portion different than the first portion;
- wherein the first and second doors can move independent of each other;
- wherein the first and second doors are positionable, in a mixture position allow airflow into the blower unit through both the exterior and interior air intake apertures, wherein the first door, in the mixture position, is sealed against the sealing member such that the first door fully closes an air passage between the at least one exterior air intake aperture and only the first portion of the lower opening;
- and
- wherein a filter is disposed between the lower opening and the at least one exterior air intake aperture and between the lower opening and the at least one interior air intake aperture, the sealing member directly abuts the filter to define the first and second portions of the lower opening.
Dependencies are inferred from the claim text.