Ceiling grille for rooftop air conditioner unit

Details Ceiling grille for rooftop air conditioner unit Ceiling grille for rooftop air conditioner unit

2000-05-30

2001-10-16

Joyce, Harold (Department: 3744)

Ventilation

Vehicle

Roof structure

C454S153000

Reexamination Certificate

active

06302780

ABSTRACT:

FIELD OF THE INVENTION
This invention relates generally to apparatus for distributing comfort air within the passenger compartment of a motor vehicle from an air conditioning unit that is mounted on the roof of the motor vehicle and, in particular, to a ceiling grille that is capable of being mounted in the passenger compartment that contains front and rear comfort air deflectors that are mounted in an air plenum.
BACKGROUND OF THE INVENTION
Typically, a roof mounted air conditioner for a recreational vehicle, mini bus, or the like provides certain space saving benefits as well as more efficient comfort air distribution to all parts of the passenger compartment.
The roof top unit is generally arranged to draw warm air upwardly from the passenger compartment, pass the air through an evaporator to cool the air and then return the cooled air downwardly through the roof into the passenger compartment. The conditioned air will herein be referred to as comfort air. Controlling the distribution of comfort air within the passenger compartment has at times been a problem because the air distribution vanes typically must be adjusted manually by the passengers. This is not only bothersome, but also cooling efficiency is reduced.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to improve roof top air conditioning systems used in motor vehicles and, in particular, recreational vehicles.
It is a further object of the present invention to more efficiently distribute comfort air from a roof top air conditioning unit throughout the passenger compartment of a motor vehicle.
A further object of the present invention is to automatically adjust the comfort air deflectors of a motor vehicle roof top air conditioning system to more efficiently distribute the comfort air within the passenger compartment.
These and other objects of the present invention are attained by means of a ceiling mounted grille for a motor vehicle for distributing comfort air from a roof top air conditioning unit throughout the passenger compartment. A ceiling mounted grille is arranged to receive conditioned air from the unit. The grille contains a comfort air plenum having front and rear deflectors that are rotatably mounted in the front and rear walls of the plenum. A rocker arm is attached to each deflector and the rocker arms are, in turn, connected to cam followers that ride in contact with the cam face of a motor driven cam. The cam face is profiled to control the positioning of both deflectors to provide for efficient front and rear distribution of comfort air.


REFERENCES:
patent: 3868896 (1975-03-01), Doll et al.
patent: 3937133 (1976-02-01), Bertin et al.
patent: 4417687 (1983-11-01), Grant
patent: 4709623 (1987-12-01), Roth et al.
patent: 5501634 (1996-03-01), Wilder
patent: 6196914 (2001-03-01), Lyu

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