JPH0741610Y2 - Vehicle interior air exhaust device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a vehicle interior air discharge device for discharging air in a vehicle interior to the outside of the vehicle.

[Prior Art] In general, the size of a vehicle compartment is smaller than that of a general living room, so it is necessary to take a large amount of ventilation in terms of smoking, carbon dioxide gas emitted by humans, and odor. Therefore, in order to introduce as much fresh air as possible into the passenger compartment, it is needless to say that an air introduction hole is provided in a place where the dynamic pressure due to the vehicle speed can be used. The air exhaust hole is provided in a negative pressure portion outside the vehicle, which is usually generated by the vehicle speed, a door lock pillar, and the like, and the air exhaust hole allows only an air flow from the vehicle interior to the vehicle exterior and is used during rain or car washing. A vehicle interior air discharge device is provided to prevent water droplets, dust, etc. from entering the vehicle interior.

However, in the vehicle interior air exhaust device, the sound outside the vehicle, particularly the wind noise during running, etc., enters the vehicle interior in the direction opposite to the flow of air from the vehicle interior to the vehicle exterior, and the quietness in the vehicle interior is reduced. There was a problem of harm.

Conventionally, as a vehicle interior air discharge device that has been made to solve such a problem, there is one disclosed in Japanese Utility Model Publication No. 56-26978. As shown in FIGS. 4 to 6, this is because the air discharge hole 4 formed in the door lock pillar 3 facing the end face 2 of the door 1 allows only the air flow from the vehicle interior to the vehicle exterior. A louver frame 7 provided for each of the small openings 6 is fitted with a flap valve 5 for blocking a directional air flow so as to open and close a large number of small openings 6 formed in a lattice, and the inside of the louver frame 7 is located inside the vehicle. In addition, the opening of the louver frame 7 is covered and a cutout 9 is formed on the vehicle body outer plate 8 side.
The sound-insulating cover 10 having the above is provided, and the sound-absorbing material 11 is attached to the surface of the sound-insulating cover 10 on the side facing the opening so that the sound-absorbing material 11 absorbs sound entering from outside the vehicle.

[Problems to be Solved by the Invention] However, in the vehicle interior air discharge device as described above, noise such as wind noise is generated only once when passing through the opening of the louver frame 7 from the outside of the vehicle. 10 The sound absorbing material 11 on the surface only hits and is absorbed, and then hits the notch 9 and hits the vehicle body outer plate 8 to reach the inside of the vehicle. Therefore, noise can be reduced to some extent, but it is not always sufficient I could not say.

In view of such circumstances, the present invention intends to provide a vehicle interior air exhaust device that can further improve the noise reduction effect.

[Means for Solving the Problems] The present invention is provided with a flap valve which is attached to an air discharge hole formed at a panel required position for partitioning the inside and the outside of the vehicle compartment by opening and closing the opening from the vehicle interior. In a vehicle interior air discharge device that allows only the flow of air to the outside of the vehicle, a box-shaped duct that includes the opening and extends upward by a desired amount is provided on the inside of the opening of the vehicle interior. A communication hole is formed on the upper side of the surface not facing the opening so as to be displaced from the opening, and a sound absorbing material is attached to substantially the entire inner surface of the duct except the opening, and the communication of the sound absorbing material is performed. By providing a slit slightly larger than the communication hole at the hole position, with respect to the air flow from the vehicle interior to the vehicle outside, the communication hole is tilted to open the communication hole and to the air flow in the opposite direction. Is a sound absorption hula that closes the communication hole. It has a configuration in which an up valve is formed.

[Operation] While traveling, negative pressure is generated outside the vehicle, the flap valve opens the opening, the sound absorbing flap valve tilts to open the communication hole, and the air inside the vehicle passes from the communication hole through the duct to the opening. In the state of being sucked out of the vehicle, noise outside the vehicle such as wind noise enters the duct through the opening, first hits the sound absorbing material on the inner surface of the duct facing the opening, is attenuated and diffuses, Most of the diffused noise disappears while being repeatedly absorbed and attenuated by the sound absorbing material on the inner surface of the box-shaped duct, and the noise entering the vehicle interior through the communication hole becomes extremely small.

Also, when there is almost no pressure difference between the inside and outside of the vehicle, such as when the vehicle is stopped, and the sound absorbing flap valve and the flap valve block the communication hole and the opening, respectively, the noise outside the vehicle is
It is more difficult to reach the inside of the vehicle as compared to when the vehicle is running, and the backflow of air from outside the vehicle is significantly reduced.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, air exhaust holes 14 are formed at both ends of a back panel 13 which forms a vehicle interior in front of a front wall 12 of a truck, and the air exhaust holes 14 are provided in the vehicle interior. A flap valve in which a louver frame 17 having an opening 15 communicating with the outside and having a lattice-shaped louver 16 arranged on the outside of the vehicle is fitted, and divided openings 18 are formed in the upper and lower multistages inside the louver frame 17 inside the vehicle. The support frame 19 is mounted, and the flap valve support frame 19 has each of the split openings 18 tilted to the outside of the vehicle with respect to the flow of air from the passenger compartment to the exterior of the vehicle, and the split openings 18 are opened to open air in the opposite direction. Split openings for flow
A flap valve 20 for closing 18 is provided.

A box-shaped duct 21 that includes the entire split opening 18 and extends upward by a desired amount is formed on the inside of the flap valve support frame 19 in the vehicle compartment, and a rear outer pillar 22 is provided above the duct 21. A rectangular communication hole (23) communicating with the vehicle interior is formed in the opposing side wall surface, offset from the division opening (18). A sound absorbing material 24 such as urethane is attached to substantially the entire surface of the inner surface of the duct 21 excluding the division openings 18, and at the position of the communication hole 23 of the sound absorbing material 24, a slightly larger size than the communication hole 23 is used. By providing the character-shaped slit 25, the communication hole 23 is opened by tilting toward the inside of the duct 21 and opening the communication hole 23 for the air flow from the vehicle interior to the vehicle exterior, and closing the communication hole 23 for the air flow in the opposite direction. A sound absorbing flap valve 26 is formed.

In addition, 27 has shown the door.

Next, the operation of the embodiment will be described.

While traveling, negative pressure is generated outside the vehicle, each flap valve 20 tilts to open each split opening 18, and at the same time, the sound absorbing flap valve 26
When the vehicle tilts to open the communication hole 23, and the air in the vehicle compartment is sucked out of the vehicle from the communication hole 23 through the duct 21 and each split opening 18 to the outside of the vehicle, Enter the duct 21 from the split opening 18 and first divide the duct 21
The sound absorbing material 24 on the surface facing the surface 18 is absorbed, attenuated and diffused. The diffused noise repeatedly hits the sound absorbing material 24 on the inner surface of the box-shaped duct 21, is absorbed and attenuated each time, most of the noise disappears, and only the slightly remaining noise is opened. Enter the passenger compartment from the communication hole 23.

In addition, when there is almost no pressure difference between the inside and outside of the vehicle, such as when the vehicle is stopped, the sound absorbing flap valve 26 and each flap valve 20 have a communication hole 23.
And in the state where each of the divided openings 18 is closed,
Noise outside the vehicle is less likely to be transmitted to the vehicle interior than when traveling.

In this way, the communication hole 23 is formed on the upper side of the surface not facing the division opening 18 so as to be displaced from the division opening 18, and the division opening 18 is formed.
By using the box-shaped duct 21 in which the sound absorbing material 24 is attached to almost the entire inner surface except for, the effect of trapping noise in the duct 21 is enhanced, and the communication hole 23 can be opened and closed by the sound absorbing material 24. By forming the sound absorbing flap valve 26, not only the backflow of air from the outside of the vehicle but also the intrusion of noise from the outside of the vehicle can be significantly reduced.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[Advantages of the Invention] As described above, according to the present invention, the communication hole is formed on the upper side of the surface not facing the opening so as to be offset from the opening, and the sound absorbing material is attached to substantially the entire surface except the opening. The use of the box-shaped duct improves the effect of confining the noise that enters from the outside of the vehicle inside the duct, and by forming a sound absorbing flap valve that can open and close the communication hole with a sound absorbing material, Not only the backflow of air from the vehicle but also the intrusion of noise from the outside of the vehicle can be significantly reduced, and the excellent effect that the quietness in the vehicle interior can be improved can be achieved.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention (I in FIG. 3).
-I arrow equivalent view), FIG. 2 is a II-II arrow view of FIG. 1, FIG. 3 is a perspective view showing an example of a mounting position of the vehicle interior air discharge device of the present invention, and FIG. 5 is a sectional view showing an example, FIG. 5 is a view taken along the line VV of FIG. 4, and FIG. 6 is a view taken along the line VI-VI of FIG. 13 is a back panel, 14 is an air discharge hole, 15 is an opening, 17 is a louver frame, 18 is a split opening, 19 is a flap valve support frame, 20 is a flap valve, 21 is a duct, 23 is a communication hole, and 24 is a sound absorbing material. , 25 is a slit, and 26 is a sound absorbing flap valve.

Claims (1)

[Scope of utility model registration request] 1. A flap valve, which is opened and attached to an air discharge hole formed at a required position on a panel for partitioning the inside and outside of the vehicle compartment and allows opening and closing of the opening, allows only the flow of air from the vehicle interior to the vehicle exterior. In the vehicle interior air exhausting device, a box-shaped duct that includes the opening and extends a desired amount upward is provided on the inside of the opening, and the upper side of the surface of the duct that does not face the opening. In addition, a communication hole is formed so as to be displaced from the opening, and a sound absorbing material is attached to substantially the entire inner surface of the duct except for the opening, and at the position of the communication hole of the sound absorbing material, slightly less than the communication hole. By providing a large slit in the sound absorbing flap valve, it tilts inward of the duct to open the communication hole for the air flow from the vehicle interior to the vehicle exterior and closes the communication hole for the air flow in the opposite direction. Specially formed Car indoor air discharge device to.