Ventilation – Vehicle – Having inlet airway
Reexamination Certificate
1999-07-12
2001-03-06
Joyce, Harold (Department: 3749)
Ventilation
Vehicle
Having inlet airway
C454S285000, C454S318000
Reexamination Certificate
active
06196914
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a ceiling grille for an air conditioner mounted to a roof panel of a vehicle for air-conditioning a passenger compartment to thereby afford comfortable on-board environment. More particularly, the present invention relates to a ceiling grille for an air conditioner of a recreational vehicle, in which a blade can automatically and continuously change a direction of air flow discharged into a passenger compartment, whereby improving cooling efficiency of the air conditioner.
2. Description of the Prior Art
Generally, an air conditioner mounted to a roof panel of a vehicle is of benefit to ease an air flow passing through an evaporator and to uniformly deliver cooled air to front and rear portions of a passenger compartment.
An air conditioner for a recreational vehicle performs its air-conditioning function by intaking warm air from a passenger compartment through both sides of a ceiling grille, passing the warm air through a heat exchanger, conveying cooled air to a center portion of the cei ing grille via a blower, and discharging the cooled air forward anc rearward to cool the passenger compartment.
A ceiling grille for an air conditioner of a recreational vehicle has a pair of blades disposed at front and rear ends thereof, respectively, through which cooled air is discharged into a passenger compartment. Each of the pair of blades serves to adjust a direction of air flow discharged through it while being manually pivoted about a horizontal center shaft.
However, in the ceiling grille of the prior art, constructed as mnentioned above, it is bothersome for a passenger to manually pivot the blade to change the direction of the air flow. Also, cooling efficiency is reduced in that the cooled air is concentrically discharged to a portion of the passenger compartment unless otherwise the blade is manually and continuously pivoted.
In other words, when the cooled air is concentrically discharged to a portion of the passenger compartment, a passenger seated adjacent to the portion may be overly exposed to cooled air while another passenger seated remote from the portion may be deficiently exposed to cooled air.
SUMMARY OF THE INVENTION
Accordingly, the present invention has been made in an effort to solve the problems occurring in the prior art, and an object of the present invention is to provide a ceiling grille for an air conditioner of a recreational vehicle, in which a blade can automatically and continuously change a direction of an air flow discharged into a passenger compartment to uniformly distribute the air flow while being pivoted about a horizontal center shaft by a motor, whereby improving cooling efficiency.
In order to achieve the above object, according to one aspect of the present invention, there is provided a ceiling grille for an air conditioner of a recreational vehicle, the ceiling grille having a blade capable of being automatically pivoted, the ceiling grille comprising: a cam rotated by a motor for providing upward and downward moving forces, the cam having a camming surface formed at one end thereof; a link pivotally fastened to a bracket mounted to the ceiling grille, the link having one end on which a first projection is formed and the other end on which a second projection is formed, the first projection being brought into contact with the camming surface of the cam; an arm having one end secured to a center shaft of the blade to be integrally rotated therewith and the other end brought into contact with the second projection of the link; and a torsion spring wound around the center shaft for biasing the blade in one direction, whereby the blade is pivoted together with the center shaft as the cam is rotated by the motor.
Accordina to another aspect of the present invention, the blade has a hook member, and the ceiling grille has a locking clip. When the hcok member is locked into the locking clip, an air outlet which is defined in the ceiling grille and in which the blade is disposed, is closed.
REFERENCES:
patent: 4018159 (1977-04-01), Bennett
patent: 4676146 (1987-06-01), Takahashi et al.
patent: 5586935 (1996-12-01), Kotoh et al.
patent: 5738580 (1998-04-01), Baek
patent: 57-148132 (1982-09-01), None
Carrier Corporation
Joyce Harold
LandOfFree
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