Ventilation – Vehicle – Condensation preventer
Patent
1990-08-31
1992-06-30
Joyce, Harold
Ventilation
Vehicle
Condensation preventer
B60S 154
Patent
active
RE0339814
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to an arrangement for preventing mist and ice formation on a side window in a door of a motor vehicle, to which window is connected at least one air-supply duct with an outlet located at the bottom part of the window, via which duct and outlet air is fed from a fan arranged in the vehicle.
It is a generally known problem that the windows of a vehicle easily become misted and even ice up when the vehicle is used in cold weather. The ventilation system of the vehicle is rated so as to quickly free the vehicle windscreen of mist and ice, and air is also generally supplied to the adjacent front side-windows to quickly achieve good visibility through the latter.
From Swedish Patent Specification No. 209924 it is also known to supply air from a mixing box arranged in the front part of a vehicle to all the windows of the vehicle. The disadvantage of the said solution is the requirement for long air ducts and a plurality of connection couplings, which result in high pressure drops and risks of leakage. In order to achieve the effect of distinctly improving the visibility in the event of misted windows in the latter case, an extremely high fan capacity is required. To achieve this with only one large fan located centrally in the vehicle involves difficulties from the viewpoint of space, noise, etc.
Keeping the rear side-windows of a vehicle free of mist is especially problematic. One proposal for solving this problem involves arranging a smaller fan in the centre pillar of the vehicle in order to supply air through the pillar and to blow the air out towards the adjacent rear side-window. However, the solution requires special measures to be taken in a load-bearing part of the vehicle bodywork and also involves other disadvantages, such as those related to the possibility of simple installation of the air ducts and fan.
SUMMARY OF THE INVENTION
The present invention relates to a simple arrangement for achieving mist- and ice-free windows in a vehicle, especially the rear side-windows of a conventional passenger car. For this purpose the present invention is characterized in that the fan is arranged in the door side below the window between an outer bodywork panel of the door and an inner inside-wall panel of the door and in that the fan draws air through an inlet duct, the inlet of which is located in the inside-wall panel towards the vehicle interior.
The invention is furthermore characterized in that the fan, the outlet duct and the inlet duct constitute a single unit.
The positioning of the fan in the door side below the window and the integration of the fan and the duct parts into one unit result in considerable advantages. The unit can be easily and quickly installed in the vehicle and located favourably, from the point of view of noise, inside a sound absorbing inner panel, while also improving the opportunities for keeping the side windows of the vehicle free of mist and ice.
In an advantageous embodiment of the invention the unit is mounted in a rear door of the vehicle, wherein the invention is characterized in that the fan and the outlet duct are arranged in the front part of the door with the air outlet arranged at the bottom front part of the window and in that the outlet is provided with air-directing surfaces which guide the air from the outlet obliquely upwards, backwards and inwards towards the window.
By positioning the outlet close to the bottom front part of the window and also by designing it with air-directing surfaces which guide the outlet air obliquely upwards, backwards and inwards towards the window, an advantageous location from the viewpoint of installation in the door can be combined with guidance of air which is effective from the point of view of visibility.
Other features characterizing the invention emerge from the attached patent claims and the following description of an advantageous embodiment of the invention. In the description, reference is made to the attached figures.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 ill
REFERENCES:
patent: 2096901 (1937-10-01), Knecht
patent: 2523923 (1950-09-01), Rodert
patent: 4432213 (1984-02-01), Katahira et al.
patent: 4512240 (1985-04-01), Mahler et al.
Joyce Harold
Saab Automobile AB
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