JPS5996066A - Water-influx preventing apparatus at outside-air introducing port of car - Google Patents

Abstract

PURPOSE:To prevent inflow of water droplets into a duct by reducing the speed of wind by installing a net in a cowl box, and by collecting at the same time, the water droplets caught by the net. CONSTITUTION:A net 6 is installed at a specific place or over the whole surface on the inner surface of a cowl box 2. Then, the air flow which passes through the space formed between the inner surface of the cowl box 2 and the net 6 is broken by the net 6, and splash of water droplets at the stepped part 21 and the projection part and 22 and 23 in the cowl box 2 or at the projection part of a duct 4 is reduced by the above-described air flow, and even if splashes are formed at the projection parts 21-23, the splashed water droplets W are caught and collected onto the net 6 by the surface tension of the water droplet, and thus influx of water droplets into the duct 4 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for preventing water from entering a vehicle interior at an outside air intake port of an automobile.

This type of outside air introduction port is generally provided with a cowl box 2 in front of a windshield 1 as shown in FIG. The running wind is guided into the vehicle interior through a duct 4 opened in the box 2 either directly or through an air conditioner or the like not shown in the figure.

Rainwater that entered the cowl box 2 along with the driving wind,
Alternatively, water during car washing is discharged from a drain port 5 formed on the side of the box 2.

However, there are protrusions 21 to 23 on the side wall surfaces 2b-20, bottom surface 2d, etc. of the cowl box 2 due to the arrangement of other equipment, etc.
is formed (Figures 1 and 3). Therefore, when the water droplets W such as rainwater that enter the cowl pocket 2 along with the running wind adhere to the side wall 2b, 2O2 bottom surface 2d, etc. of the box 2 and flow toward the drain port 5, the above-mentioned protrusions 21- At 23, it becomes droplets and splashes up.

On the other hand, the airflow flowing through the cowl hooks 7 and 2 is quite fast while driving, and is particularly fast when the cross-sectional area of the cowl hooks 7 and 2 is small. Infiltrate. Also, the actual air is drawn around the duct 4 protruding from the bottom surface 2d of the cowl box 2 by the airflow, hits the protruding wall surface of the duct 4, and the droplets are sucked into the duct 4.

The purpose of the present invention is to solve the above-mentioned problems.The present invention provides a net 6 on a specific part or the entire surface of the inner surface of the cowl box 2 to reduce the wind speed and at the same time attach and collect water droplets. It is characterized by preventing water droplets from entering the inside.

That is, FIG. 1 shows an example in which the net 6 is provided in front of the stepped portion 21 of the side wall 2b on the rear side of the cowl box 2 in the traveling direction. The net 6
are arranged with a slight gap between them and the side 12b as shown in FIG.

Although the net 6 is provided only near the stepped portion 21 in the figure, it may be provided over substantially the entire surface of the side wall 2b. In addition, when the upper part of the side wall 2b has a slope 2e or the like as shown in the figure, the upper part 6a of the net 6 is made to protrude above the lower end of the slope 2e.

The mesh 6 may be a synthetic resin mesh, wire mesh, punched metal, knitted fabric, woven fabric, non-woven fabric, or the like as appropriate.

3 and 4 show an example in which the net 6 is provided on the bottom surface 2d of the cowl box 2. Is the net 6 a protrusion on the bottom surface 2d? ? -23 with a slight gap, and extends to the protruding wall surface of the duct 4.

Note that the net 6 may be formed integrally with the net covering the side wall 2b in the example of FIGS. 1 and 2. Also, the net 6 may be provided on substantially the entire inner surface of the cowl box 2, including the side wall 2C and the top plate 2a on the front side in the direction of travel.

Since the present invention has the above configuration, the airflow passing between the inner surface of the cowl box 2 and the net 6 is weakened by the net 6,
゛The air flow reduces the flying of water droplets on the stepped portion 21, the protruding portions 22 and 23 in the cowl box 2, the protruding portion of the duct 4, etc., and even if water droplets are generated on the protruding portions 21 to 23, etc. The splashed water droplet W is drawn into the net 6 due to its surface tension.
The problem of water droplets entering the duct 4 can be solved with an extremely simple structure.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway slope view of the front part of an automobile equipped with a water intrusion prevention device at the outside air inlet of the present invention, Fig. 2 is an enlarged vertical sectional view of the main part, and Fig. 3 is a diagram of another embodiment. The slope view and Fig. 4 are its enlarged vertical cross-sectional views. 1 is a windshield, 2 is a cowl box, 3 is an outside air intake hole, 4 is a duct, 5 is a drain port, and 6 is a screen.

Claims (1)

[Claims] (1) In the case where the outside air introduced into the cowl box from the outside air introduction hole of the cowl box is guided into the passenger compartment through a duct that opens inside the box, a net is installed inside the cowl box to reduce the wind speed. A water intrusion prevention device at an outside air intake of an automobile, characterized in that it prevents water droplets from entering the duct by adhering and collecting the water droplets at the same time.