JPS6134891Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drainage structure for a ventilation hole in a vehicle such as an automobile, and an object thereof is to provide a drainage structure for a ventilation hole that prevents water from entering through the ventilation hole during car washing.

BACKGROUND ART Vehicles such as automobiles are provided with ventilation holes for introducing outside air at appropriate locations inside and outside the vehicle in order to exchange the air inside the vehicle or take air into air conditioning equipment such as coolers, heaters, and defroster.
Generally, in such a ventilation hole, a louver is attached to the outside air opening of the vehicle body in order to prevent rainwater and the like from entering the vehicle body. These louvers are sufficient to prevent rainwater from entering due to normal natural phenomena, but when washing a vehicle, especially when washing a car under high pressure, the water pressure is extremely high (for example, about 50 kg/ ^cm2 ), so the louver alone is sufficient to prevent water from entering. It is difficult to completely prevent water from flowing into the ventilation holes, and water may sometimes enter the ventilation holes.

Conventionally, in order to solve this problem, a partition plate made of a flat plate was installed inside the ventilation hole so as to block part of the air passage, and this flat plate was configured to block the water droplets that flew in. However, when a simple flat plate without any special features is provided in the passageway, the effective ventilation cross-sectional area of the ventilation holes becomes small, resulting in a significant decrease in the amount of ventilation.

The present invention solves the above-mentioned drawbacks by adopting the structure described in the claims of the utility model registration, and prevents water from entering during car washing, etc., without significantly reducing the effective ventilation cross-sectional area of the ventilation hole. It has a drainage structure with ventilation holes.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a ventilation hole installed at a required location of the vehicle, for example, on the side wall surface above the rear of the vehicle as shown in FIG. The hole 1 is composed of a ventilation duct 2 that forms a ventilation path, an exterior communication hole 3 that opens to the outside of the vehicle, and an interior communication hole 4 that opens to the interior of the vehicle, which are bored at predetermined positions of the ventilation duct 2.

In the present invention, a partition plate 5 having the structure shown in FIG. 3 is provided in the well-known ventilation hole 1 having the above-mentioned structure so as to be located inside the ventilation duct 2 and to block the ventilation path. As shown in FIG. 3, this partition plate 5 is made by making a required number of character-shaped cuts at intervals in the vertical direction of one flat plate, pushing and bending the cut portions toward the outside communication hole 3, and then The baffle plate 6 is made to expand at an inclination angle of , and the slit portion 7 formed by hollowing out the baffle plate 6 is used as an air flow path. In addition, a drain hole 8 is bored in the lower bottom surface of the ventilation duct 2, located directly below the rear of the partition plate 5. With this configuration, even if water droplets due to a strong water flow during car washing jump into the ventilation duct 2 from the outside communication hole 3, the water droplets will be directed to the baffle plate 6 that slopes outward as shown in FIG. It is blocked by the collision, and it becomes impossible to intrude inward from the partition plate 5. Water droplets hitting the baffle plate 6 naturally evaporate while remaining attached to the baffle plate surface, or water dripping inward is discharged from the drain hole 8. On the other hand, ventilation air introduced into or discharged from the vehicle exterior communication hole 3 through the ventilation duct 2 into the vehicle interior has a low flow velocity and is a gas, so it bends freely along the passage and is not blocked by the baffle plate 6. The air passes through the slit portion 7 without any air leakage and is ventilated. In addition,
It is desirable that the partition plate 5 be provided as close to the vehicle exterior communication hole 3 as possible.

Further, in the example shown in FIG. 2, the height of the partition plate 5 is such that there is a gap between the partition plate 5 and the ceiling surface of the ventilation duct 2, but it may be provided so as to completely block the cross section of the ventilation path of the ventilation duct 2. It is.

In the case of the present invention, the draining effect and ventilation effect change depending on the inclination angle θ (see Fig. 4) of the baffle plate 6 formed on the partition plate 5, but according to experiments, the inclination angle θ = 30
It is best to set it at an angle of 50° to 50°. FIG. 5 shows a change curve of the draining effect and the ventilation effect with respect to the change in the inclination angle θ of the baffle plate 6 when the partition plate 5 of the present invention is provided so as to completely block the cross section of the ventilation passage. Regarding the drainage effect, the inclination angle θ = 0, that is, when the cross section of the ventilation passage is completely blocked by the flat partition plate 5 similar to the conventional one, the drainage efficiency = 1 (no water intrusion), and regarding the ventilation effect, the partition plate 5 The amount of ventilation when no ventilation is provided is shown as ventilation efficiency = 1 (maximum). As is clear from the illustrated curves, the drainage effect gradually decreases from around θ=30°, and the ventilation effect becomes almost the same as without the partition plate around θ=50°. Therefore, this θ=30°~50
If the inclination angle θ of the baffle plate 6 is selected within the range of .degree., the ventilation effect can be improved without significantly reducing the draining effect.

The drainage structure of the ventilation hole according to the present invention has the above-mentioned configuration and function, with the baffle plate cut out integrally with the partition plate to prevent water droplets from entering, and the slits drilled on the partition plate to prevent water droplets from entering. Since the ventilation hole serves as a passage for incoming air, compared to conventional drainage structures that use a simple flat plate as a partition plate, it is highly effective in preventing water from entering without significantly reducing the effective cross-sectional area of the ventilation hole. .

[Brief explanation of the drawing]

Fig. 1 is an external view of an automobile showing one example of the arrangement position of ventilation holes, Fig. 2 is a schematic side view showing one embodiment of the drainage structure of the ventilation holes according to the present invention, and Fig. 3 is a partition plate. FIG. 4 is an enlarged sectional view of the baffle plate portion, and FIG. 5 is a characteristic diagram showing changes in the drainage effect and ventilation effect with respect to the inclination angle θ of the baffle plate 6. 1... Ventilation hole, 2... Ventilation duct, 3... Vehicle exterior communication hole, 4... Vehicle interior communication hole, 5... Partition plate, 6...
...Baffle plate, 7...Slit part, 8...Drain hole.

Claims (1)

[Scope of utility model registration request] A partition plate is provided inside the ventilation duct to block the ventilation path, and a drainage hole is bored at the bottom of the ventilation duct directly below the inside of the car, and a drain hole is provided on the surface of the partition plate. A plurality of letter-shaped notches are formed at intervals in the vertical direction, and each of the letter-shaped notches is expanded at an angle of 30° to 50° toward the outside of the ventilation duct to act as a baffle plate for water droplets. A drainage structure for a ventilation hole in a vehicle, characterized in that the baffle plate is hollowed out, and a slit portion formed at the site where the baffle plate is hollowed out serves as a passage for air flowing in the ventilation duct.