Ventilation – Vehicle – Condensation preventer
Patent
1993-03-15
1994-09-27
Joyce, Harold
Ventilation
Vehicle
Condensation preventer
B60H 126
Patent
active
053503350
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a distributor device for a ventilation system in a vehicle, intended for distributing ventilation air to a number of different ventilation nozzles in the vehicle, and provided with a substantially cylindrical housing which is designed with a number of outlets and in which a ventilator unit is rotatably journalled for distributing ventilation air to the different outlets in the housing, the housing having outlets in both its circumferential surface and its end walls, and the ventilator unit being cylindrical and having a circumferential surface and end walls in which there are provided apertures which, by rotation of the ventilator unit, may be caused to coincide with corresponding outlets in the circumferential surface and end walls of the housing.
STATE OF THE ART
Ventilation systems for vehicles generally include a ventilation housing in which air is led in and tempered before being supplied, by means of a distributor device, to the interior of the vehicle via a number of outlets, and nozzles placed at different positions in the vehicle interior. Such outlets and nozzles may, for example, consist of defroster nozzles, dashboard nozzles, fascia nozzles and floor nozzles. Distribution of the ventilation air between such outlets is commonly achieved with the aid of a number of dampers which may be caused to close or open communication between the ventilation housing and each respective nozzle. In the employment of, for example, three different nozzles, it is usual in such contexts to employ three different dampers for regulating the nozzles. As a result, such a ventilation system will be of relatively complex design and construction, with a plurality of separate dampers and regulators. Consequently, the design of the distributor device will be bulky in itself in order to be able to accommodate all of the included components. In turn, this implies that the above-mentioned prior art solution is relatively heavy and expensive to manufacture. With a view to reducing the number of regulators and dampers or ventilator devices, it is known in the Art to cause one and the same ventilator device to control distribution of air to a plurality of different outlets.
One such simplified design of the distributor device is disclosed in SE,C,434 487, in which a ventilator device designed as a planar damper is disposed to control the air distribution to three different outlets in the circumferential surface of the housing of the distributor device. One drawback inherent in such a design is, however, that it is necessary to determine beforehand how the air is to be distributed at certain pre-set damper positions. As a result, such a solution does not afford the same possibility of individual regulation of each outlet as when separate dampers are employed.
The disadvantages inherent in both of the above-mentioned solutions become even more manifest when further outlets are desired, for example if it is desired to provide, in a private automobile, separate air outlets in the immediate proximity of the rear seat. If, in addition, the intention is to have the possibility of providing separate regulation of the ventilation air on the right and left hand sides in the vehicle, sophisticated variations of the prior Art solutions will be even more complex and expensive.
A further solution is proposed in DE,A,2209365, in which a cylindrical distributor housing with a cylindrical ventilator drum disposed in the housing distributes air from one inlet in the end wall to outlets in the circumferential surfaces. By rotating the ventilator drum, apertures in the ventilator drum can be caused to coincide with corresponding apertures in the housing, whereby regulation of the air flow between outlets can be achieved. U.S. Pat. No. 3659515 and U.S. Pat. No. 4157113 also call for the utilization of cylindrical ventilation drums in which inlets and outlets are provided in the circumferential surface of the ventilation drum.
A further development of the cylinder concept is disclosed in German Patent Specificatio
REFERENCES:
patent: 3659515 (1972-05-01), Galaniuk
patent: 3661069 (1972-05-01), Grosseau
patent: 4157113 (1979-06-01), Karran et al.
Joyce Harold
Saab Automobile Aktiebolag
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