JPS6144503Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a ventilation system for vehicles such as automobiles and railway vehicles, which is characterized in that a spherical valve is provided inside a ventilation duct that communicates the interior and exterior of the vehicle.

A conventional vehicle ventilation system has a ventilation duct 6 in an opening 63 of a vehicle body panel 62, as shown in FIG.
4, an exterior grille 72 is attached to the opening 63 of the vehicle body panel 62, and a soft plate-shaped valve 71 made of rubber or the like is fixed to the opening 65 on the indoor side of the ventilation duct 64 on the outdoor side of the opening 65. Since this is a vehicle ventilation system fixed with a fixture 66, in this conventional vehicle ventilation system, when the air pressure inside the vehicle increases, the soft plate-shaped valve opens from the interior to the outside as shown by the imaginary line. The indoor and outdoor areas communicate with each other to reduce the indoor air pressure, but since the plate valve is made of soft material, the plate valve may warp due to thermal deformation or other factors during use and no longer seal the opening. There are drawbacks such as outside air and outside noise entering the vehicle interior, and when the inside of the vehicle becomes negative pressure, the soft plate valve gets caught up in the opening, causing the plate valve to malfunction. It has the disadvantage that it stops working. Further, in the conventional vehicle ventilation system, one end of the plate valve must be fixed, so there is a drawback that it takes time to fix the valve.

The purpose of this invention is to eliminate these drawbacks of conventional vehicle ventilation systems so that it can be used in good condition for a long period of time, the valve does not get caught in the opening, and the valve is not fixed. That is.

Next, an embodiment of the vehicle ventilation system of this invention will be described.

Example 1 An opening 3 is provided in the body panel 2 of the automobile 1, and the opening 3 of the automobile 1 is provided on the indoor side of the opening 3 of the vehicle body panel 2.
An outer duct piece 4 bent downward at a substantially right angle from the horizontal direction is provided on the indoor side of the vehicle, and one end of the outer duct piece 4 is fixed to a nut 5 fixed to a vehicle body panel 2 with a bolt 6.

A ventilation duct is constituted by fixing an inner duct piece 7 to the other end of the outer duct piece 4 by a claw 4' and a fixing hole 7', and the vertical direction of the inner duct piece 7 constituting this ventilation duct is A circular opening in the center inside the part 9
A conical receiving part 8 is provided, and guide ribs 10 inclined downward from the side wall of the inner duct piece 7 are provided at intervals on the central opening edge of the receiving part 8.

A spherical valve 11 having a diameter larger than the diameter of the circular opening edge of the receiving part 8 is placed on this receiving part 8. An exterior grill 12 is fixed to the vehicle body panel 2 on the outdoor side of the opening 3 of the vehicle body panel 2 with claws 12' of the exterior grill 12, and an opening 13 is provided on the upper side wall of the receiving portion 8 of the inner duct 7. Then, connect the drain pipe 1 to this opening 13.
This is an automotive ventilation system that connects 4.

In the automobile ventilation system of Example 1, when the air pressure inside the car increases, the spherical valve 11 floats due to the pressure, and the indoor side and the outdoor side of the car communicate with each other, thereby lowering the indoor air pressure. When the indoor side and the outdoor side of the car are connected and the indoor air pressure becomes almost the same as the outdoor air pressure, the spherical valve 11 that had been floating until now falls to the receiving part 8 due to its own weight and is guided by the guide rib 10. The opening 9 of the receiving part 8 is closed while

Further, in the automobile ventilation system of the first embodiment, water such as rainwater that has entered through the exterior grille 12 is discharged from the conical receiving portion 8 to the outside of the automobile through the drain pipe 14.

Embodiment 2 On the indoor side of the opening 23 of the vehicle body panel 22, an outward duct piece 24 is provided which is bent downward at a substantially right angle from the horizontal direction on the indoor side. One end of the leaning duct piece 24 is fixed with a bolt 26. This outer duct piece 2
A water drain part 34 having an inclined part 34' to prevent water from entering is provided at the lower part of one end side of the pipe 4.

The inner duct piece 2 is attached to the other end of the outer duct piece 24.
7 is fixed by the claw 24' and the fixing hole 27' to form a ventilation duct, and the inside of the vertical part of the inner duct piece 27 forming this ventilation duct has a circular opening 29 in the center. A horizontal receiving part 28 is provided,
An inner duct piece 27 is attached to the center opening edge of this receiving part 28.
Guide ribs 30 are provided at intervals and are inclined downwardly from the side wall of the housing.

A spherical valve 31 having a diameter larger than the diameter of the circular opening edge of the receiving portion 28 is placed on the receiving portion 28 .

The ventilation system for an automobile has an exterior grille 32 fixed to the vehicle body panel 22 on the outdoor side of the opening 23 of the vehicle body panel 22 with claws 32' of the exterior grille 32.

Example 3 An outer duct piece 44 having almost the same shape as the outer duct piece of Example 2 was inserted into the opening 43 of the vehicle body panel 42.
An exterior grill 52 is attached to the guide side of the vehicle body panel 42 with nuts 45 and bolts 46, and an exterior grill 52 is attached to the exterior side of the opening 43 of the vehicle body panel 42.
It is fixed with the claw 52'.

The inner duct piece 4 is attached to the other end of the outer duct piece 44.
7 is fixed by the claw 44' and the fixing hole 47' to form a ventilation duct. As the vertical part of the inner duct piece 47 goes downward, the diameter gradually decreases and the opening 4 becomes circular in the center.
A receiving portion 48 which doubles as a guide plate is provided, and this receiving portion 4
This is a ventilation system for a vehicle in which a spherical valve 51 having a diameter larger than the diameter of a circular opening 49 of a receiving portion 28 is mounted on the holder 8 .

In addition, in the vehicle ventilation systems of Examples 1 to 3, an ordinary spherical valve with a flat surface was used as the spherical valve, but a spherical valve with a flocked surface was used as the spherical valve to improve sealing performance. Alternatively, you can use a spherical valve that can be used as a spherical valve by filling a gas lighter than air inside the spherical valve to reduce the weight of the spherical valve so that it operates quickly when the air pressure inside the vehicle increases even a little. good. Further, the outer duct piece and the inner duct piece may be formed into one piece.

The vehicle ventilation system of this invention uses a spherical valve as a valve, and since the spherical valve is simply placed on the receiving part, there is no need to fix the spherical valve. The vehicle ventilation system of this invention can be used in good condition for a long period of time because the spherical valve is not caught in the opening of the receiving part.

[Brief explanation of the drawing]

Fig. 1 is a rear side view of the automobile, Fig. 2 is a longitudinal sectional view of one embodiment of the present invention, Fig. 3 is a longitudinal sectional view of another embodiment, and Fig. 4 is a longitudinal sectional view of yet another embodiment. Vertical sectional view, FIG. 5 is a vertical sectional view of a conventional product. 1 is a car, 2 is a car body panel, 3 is an opening, 4
and 7 are the duct pieces, 8 is the receiving part, 9 is the opening of the receiving part, 1
0 is a guide rib, 11 is a spherical valve, and 12 is an exterior grill.

Claims (1)

[Scope of utility model registration request] In a vehicle ventilation system, a ventilation duct that communicates between the indoor side and the outdoor side of the vehicle is provided with a valve that allows air to flow in only one direction from the inside of the vehicle to the outside of the vehicle. One part of the ventilation duct is arranged almost vertically, and a receiving part with a circular opening in the center is provided inside the vertical part of the ventilation duct,
A ventilation system for a vehicle, characterized in that a spherical valve having a diameter larger than the diameter of the circular opening edge of the receiving part is mounted on the receiving part.