JPH07276976A - Ventilation duct - Google Patents

Abstract

PURPOSE:To minimize the influence of a flashing part on the airflow quantity of a ventilation duct. CONSTITUTION:A ventilation duct is provided with a frame body 10 with a ventilation aperture 9 formed to exhaust the internal air of a vehicle, a plate- like butterfly valve disposed in such a way as to open/close the ventilation aperture by the internal air exhausted in a specific direction, and a flashing part 8 having the bottom face formed of the lower face of the ventilation aperture 9 at the lowest part where the butterfly valve of the ventilation aperture 9 of the frame body 10 is disposed, and rising from the lower part of the opposite side face away by the specified distance L. The relation h/H between the height (h) of the flashing part 8 and the height H from the bottom face of the ventilation aperture 9 at the lowest part of the ventilation aperture 9 for exhausting the internal air to the upper face of the ventilation aperture 9 at the uppermost part is set to 0.4 or less.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vent duct in which a plate-shaped butterfly valve is attached to a frame body having a ventilation window, and in particular, indoor air disposed in a vehicle can be discharged to the outside of the vehicle. And the vent duct.

[0002]

2. Description of the Related Art As a conventional vent duct of this type, there is a quarter vent duct provided on the rear side of a rear bumper of an automobile. This quarter vent duct is one in which a plate-shaped butterfly valve is attached to a frame body with a ventilation window, and this quarter vent duct introduces outside air into the passenger compartment from the outlet of the instrument panel and introduces it. The discharged outside air is discharged through the vehicle interior.

[0003]

In the conventional vent duct, whether the outside air is introduced into the vehicle compartment from the outlet of the instrument panel is "strongest" or "weak", the outside air is introduced. Need to respond to. Therefore, normally, the closed state of the ventilation window is maintained by the weight of the plate-shaped butterfly valve, or a magnetic material is used for the butterfly valve and the frame body, and the closed state is maintained by the attraction force of both.

However, the demand for the vent duct is that the butterfly valve does not easily open even when the washing water is washed when washing the vehicle with high-pressure washing water, or the outside air from the outlet of the instrument panel to the inside of the vehicle is "weak. In order to easily open the butterfly valve even when it is introduced in the above condition, there is a demand for a structure that satisfies both of them at the same time.

Therefore, it is usually set so that the plate-shaped butterfly valve can be easily opened even when the air is blown "weakly" from the air outlet of the instrument panel into the passenger compartment. Therefore, there is a possibility that the wash water will enter when washing the vehicle with the high-pressure wash water. As a measure against this, even if the wash water enters, by providing a water return plate that returns the invading wash water, it is possible to discharge the wash water without affecting it. it can. However, it would be meaningless if the water return plate had a great influence on the air flow rate. At the very least, the presence of water baffles should minimize the effect on airflow.

If the butterfly valve is set to open easily when the outside air is introduced into the vehicle compartment from the outlet of the instrument panel in a "weak" state, the "strongest" is set.
If the door is suddenly closed in the state, the butterfly valve may hit the frame and make a collision noise or a continuous noise depending on the condition.

Therefore, the first object of the present invention is to prevent the butterfly valve from hitting the frame to generate a sound even in a use state in which the ventilation amount is large. Also,
The second object is to minimize the influence of the water return of the vent duct on the ventilation amount.

[0008]

According to a first aspect of the present invention, there is provided a vent duct which can be opened and closed by a frame body having a ventilation window for exhausting indoor air of a vehicle and an indoor air exhausting the ventilation window in a specific direction. The bottom surface of the lowermost ventilation window provided with the plate-shaped butterfly valve and the butterfly valve of the ventilation window of the frame was used as the bottom surface, and it stood up at a predetermined distance from the lower side of the opposite surface. And a height H of the water return section and a height H from a bottom surface of the ventilation window at the bottom of the ventilation window for discharging indoor air to an upper surface of the uppermost ventilation window. The h / H is set to 0.4 or less.

According to another aspect of the present invention, there is provided a vent duct, which is a plate-like member provided with a frame body having a ventilation window for exhausting indoor air of a vehicle, and openable and closable by the indoor air exhausting the ventilation window in a specific direction. A butterfly valve, and ribs arranged to come into contact with the frame body in the moving range of the butterfly valve disposed in the uppermost ventilation window before the frame body in the moving process of the butterfly valve. Is.

A vent duct according to a third aspect of the present invention is a plate-like member which is arranged so as to be openable and closable by a frame body having a ventilation window for exhausting indoor air of a vehicle and indoor air exhausting the ventilation window in a specific direction. With a butterfly valve, in the range of movement of the butterfly valve arranged in the uppermost ventilation window, forming a corner so as to contact from the opening corner of the frame in the movement process of the butterfly valve, The contact of the butterfly valve is gradually increased from both sides of the frame.

[0011]

According to the first aspect of the present invention, the bottom surface of the lowermost ventilation window is used as the bottom surface, and the water return section that rises at a predetermined distance from the lower side of the opposite surface is the uppermost portion of the ventilation window for discharging indoor air. The relationship between the height H from the bottom surface of the lower ventilation window to the upper surface of the uppermost ventilation window and the height h of the water return section, h / H was set to 0.4 or less, and the water return section was provided. By increasing the fluid resistance,
The air volume decreases from the self. However, there is a constant relationship between the height H from the bottom surface of the ventilation window at the bottom of the ventilation window to the top surface of the ventilation window at the top and the height h of the water return section. The minimum value.

According to the second aspect of the present invention, a rib that comes into contact with the frame body in the moving range of the butterfly valve arranged in the uppermost ventilation window prior to the frame body in the movement process of the butterfly valve is provided. As a result, the ribs arranged on the frame are caused to collide with the butterfly valve, and the collision noise between the rib and the relatively soft butterfly valve is less likely to be generated.

According to another aspect of the present invention, in the moving range of the butterfly valve arranged in the uppermost ventilation window, the frame body abutting against a part of the butterfly valve is moved in the moving process of the butterfly valve. A corner is formed so as to come into contact with the opening corner, the contact state of the butterfly valve gradually changes from both sides of the frame body, and the load of the butterfly valve gradually increases, so that the frame body collides with the butterfly valve. Does not happen.

[0014]

EXAMPLES Examples of the present invention will be described below. In addition, in the embodiment, only the representative reference numerals and symbols are described for common explanations among the components in parentheses having the same function.

FIG. 1 is a perspective view of the entire vent duct of the first embodiment of the present invention, and FIG. 2 is a sectional view of the main parts of the vent duct of the first embodiment of the present invention.

In FIG. 1 and FIG. 2, a ventilation window 9 for exhausting indoor air of a vehicle is formed in the center, and a flange provided with a mounting portion 11a extending from the outer periphery thereof and having a plurality of mounting holes for the vehicle. The frame body 10 in which the portion 11 is formed is entirely formed by injection molding of synthetic resin.
In addition, in the central portion of the frame body 11, an inclined portion 12 formed in three steps is provided.
(12a, 12b, 12c). In the ventilation window 9 of the present embodiment, each through hole 12A, 12B (see FIG. 2) is formed in each inclined portion 12 formed in three diagonal steps, and normally, each through hole 12A, 12B (see FIG. 2) is formed. (See) is larger than the area of the ventilation window 9 to reduce the fluid resistance due to the through holes 12A, 12B, 12C (12C not shown) of each inclined portion 12. The through-holes 12A, 12B, 12C of each of the three inclined portions 12 have a plate-shaped butterfly valve 20 (20a, 20a) covering the through-holes on the upper surface thereof.
b, 20c) are provided. Each butterfly valve 20
Fits the hole to the protrusion provided on the upper side of the inclined portion 12 (12a, 12b, 12c), and
It is fixed by caulking 14 via (13a, 13b, 13c). Usually, the lower part of the butterfly valve 20 is closed by covering the through holes by its own weight.

The frame 10 has a protruding cylindrical portion 15 which forms the ventilation window 9. A plurality of ribs 16 are provided on the upper portion of the tubular portion 15. As shown in FIG. 2, the rib 16 has a protrusion amount that exceeds the tubular portion 15 from the flange portion 11 of the frame body 10. The tip of the rib 16 due to this protrusion is in a position where it abuts on the open free end of the butterfly valve 20a when the butterfly valve 20a is fully opened.

The rib 16 is also disclosed in the third embodiment shown in FIG.

The vent duct of this embodiment constructed as described above operates as follows.

First, when the outside air is introduced into the vehicle compartment from the outlet of the instrument panel in the "strongest" state, the butterfly valves 20a, 20b, 20c are fully opened. In this "strongest" state, when a plurality of doors are suddenly closed to pressurize the passenger compartment, the butterfly valve 20 contacts the tubular portion 15 of the frame body 10 before the butterfly valve 20a is opened. Collides with the tip of the rib 16. In this collision, even if a part of the butterfly valve 20a made of a relatively soft rubber material and the tip of the rib 16 collide, the butterfly valve 20a side cannot be a vibration source because the butterfly valve 20a side has a characteristic of a flexible material. Also, since the rib 16 side is also impacted from its vertical side, unlike the case where the butterfly valve 20a collides with a relatively wide surface, the butterfly valve 20a does not serve as a vibration source.

That is, in this embodiment, a frame 10 having a ventilation window 9 for exhausting the indoor air of the vehicle and a plate-like member arranged so as to be openable and closable by the indoor air exhausting the ventilation window 9 in a specific direction. The butterfly valve 20 and the frame body 10 in the moving range of the butterfly valve 20a disposed in the uppermost through hole 12A are different from the frame body 1 in the moving process of the butterfly valve 20a.
The rib 16 that comes into contact before 0 is provided, and the embodiment of claim 2 can be made. Therefore, before the butterfly valve 20 hits the frame 10, the butterfly valve 20
The free open end of a collides with the tip of the rib 16, and this collision is made by a butterfly valve 20a made of a relatively soft rubber material.
Part of the rib 16 collides with the tip of the rib 16, and the butterfly valve 20a side cannot serve as a vibration source.
Since the side is also impacted from the vertical side, it does not become a vibration source.

FIG. 3 is a perspective view of the entire vent duct of the second embodiment of the present invention, and FIG. 4 is a front view of the main parts of the vent duct of the second embodiment of the present invention. In the drawings, the same reference numerals and symbols as those in the first embodiment show the same or corresponding components as those of the first embodiment, and therefore, duplicated description will be omitted here. In particular, in this embodiment, only the differences from the above embodiment will be described.

3 and 4, in this embodiment, the ventilation window 9 of the frame body 10 in which the flange portion 11 provided with the mounting portion 11a having a plurality of mounting holes for the vehicle is formed is the upper two corners. Increase the radius of 15A to lower the 2
The center of the corner 15B is closer to the center of the ventilation window 9 than the radius of the corner 15B. That is, as shown in FIG. 4, the upper two corners 1 of the protruding tubular portion 15 forming the inner opening of the ventilation window 9 of the frame body 1
Increase the R (radius) of 5A and, in addition, the butterfly valve 2
The open free end of 0a is formed so that the contact between the two gradually increases as the opening advances.

The vent duct of this embodiment constructed as described above operates as follows.

When the outside air is introduced into the passenger compartment from the outlet of the instrument panel in the "strongest" state, the butterfly valves 20a, 20b, 20c are fully opened. In this "strongest" state, assume that the same harsh conditions as the former were set. At this time, before the butterfly valve 20 hits the upper portion of the tubular portion 15 of the frame body 10, the open free end of the butterfly valve 20a contacts the inside of the upper two corners 15A, and this contact is made from a relatively soft rubber material. The butterfly valve 20a has a characteristic that the butterfly valve 20a side is made of a flexible material, and the butterfly valve 20a side bends to gradually deepen the contact.
The butterfly valve 20a does not serve as a vibration source unlike the case of collision on a relatively wide surface.

By the way, the tubular portion 15 of the frame body 10 of the present embodiment.
The upper two corners 15A of the ventilation window 9 in are formed with a predetermined large radius, but when the present invention is carried out,
It is formed in a straight line or a curved line and is in the movement range of the butterfly valve 20a arranged in the uppermost through hole 12A, and the contact is started from the opening corner of the ventilation window 9 of the frame body 10 in the movement process of the butterfly valve 20a. The same effect can be obtained by forming the corners and gradually moving the butterfly valve 20a from both sides of the frame body 10 to the large contact state.

That is, in this embodiment, a frame 10 having a ventilation window 9 for discharging the vehicle interior air and a plate-like member arranged so as to be openable and closable by the room air exhausting the ventilation window 9 in a specific direction. The butterfly valve 20 is included in the movement range of the butterfly valve 20a disposed in the uppermost ventilation window 12A, and contact is started from the opening corner of the ventilation window 9 of the frame body 10 in the movement process of the butterfly valve 20a. The corner is formed in the frame 10
The butterfly valve 20a gradually shifts from both sides of the ventilation window 9 to a large contact state, and this can be the embodiment of claim 3.

FIG. 5 is a central longitudinal sectional view of the vent duct according to the third embodiment of the present invention. FIG. 6 is a characteristic diagram of the vent duct according to the third embodiment of the present invention. In the figure,
The same reference numerals and symbols as those in each of the above-mentioned embodiments indicate the same or corresponding components as those of the above-mentioned respective embodiments, and therefore, duplicated description will be omitted here.

Referring to FIG. 5, in this embodiment, a frame body 10 having a flange portion 11 having a ventilation window 9 for exhausting indoor air of a vehicle formed at the center thereof has a three-stage slant at the center portion thereof. It has the part 12 (12a, 12b, 12c). In the ventilation window 9 of the present embodiment, each through hole 12A, 12B, 12C is formed in each inclined portion 12 formed in three oblique directions, and each through hole 12A, 12B, 12C is usually formed.
The total area of the inclined windows 1 is larger than that of the ventilation window 9.
The fluid resistance due to each of the through holes 12A, 12B, 12C of 2 is reduced. Through-holes 12A in each of the three inclined portions 12;
12B and 12C have through-holes 12A and 12 on the upper surface thereof.
B-shaped butterfly valve 20 (20a,
20b, 20c). Usually, the lower part of the butterfly valve 20 is closed by covering the through holes by its own weight.

Here, the frame body 10 includes the through holes 12A, 1
2B, 12C formed inclined portion 12 (12a, 12b,
12c), the height from the bottom surface of the inclined portion 12c having the lowest through hole 12C to the inner surface of the upper portion of the ventilation window 9 is defined as the height H to the upper surface of the ventilation window 9. Further, a water return section 8 is formed which extends from the bottom surface of the inclined section 12c having the lowest through hole 12C to the back surface side of the inclined section 12c and rises upward. That is, the bottom surface of the lowermost ventilation window 9 in which the butterfly valve 20 of the ventilation window 9 of the frame body 10 is arranged is the bottom surface,
The water return section 8 rises at a predetermined distance from the lower side of the opposite surface, and its height is h. Further, the distance from the back surface of the flange portion 11 of the frame body 10 to the inner surface of the water return portion 8 is L. The relationship between the height H of the ventilation window 9 and the height of the water return section 8 is h, and the distance to the water return section 8 is L. According to experiments by the inventors, the characteristics shown in FIG. Obtained. That is, h
When / H is 0.4 or less, the fluid resistance becomes the minimum regardless of the distance to the water return section 8 regardless of L.

Therefore, in the case of providing the water return section 8 extending upward from the bottom surface of the inclined portion 12c having the lowermost through hole 12C formed therein to the rear surface side of the inclined portion 12c as in the present embodiment. When h / H is set to 0.4 or less, an optimum structure for preventing invasion of high-pressure washing water or the like can be formed with the highest efficiency.

That is, the vent duct of this embodiment is arranged so as to be openable / closable by the frame body 10 having the ventilation window 9 for discharging the indoor air of the vehicle and the indoor air for discharging the ventilation window 9 in a specific direction. The plate-shaped butterfly valve 20 and the ventilation window 9 of the frame body 10
The lower part of the ventilation window 9 in which the butterfly valve 20 is arranged is the bottom surface, and the water return section 8 is raised at a predetermined distance L from the lower side of the opposite surface. The relationship between the height H from the bottom surface of the ventilation window 9 at the bottom of the ventilation window 9 to the top surface of the ventilation window 9 at the top and the height h of the water return section 8 is
The h / H is set to 0.4 or less, which can be the embodiment of claim 1.

Therefore, from the bottom surface of the inclined portion 12c having the lowermost through hole 12C formed to the rear surface side of the inclined portion 12c,
When providing the water return section 8 that rises upward, setting h / H to 0.4 or less is an optimum way to prevent the intrusion of high-pressure washing water or the like that occurs when harsh conditions are set. Can be formed with maximum efficiency.

By the way, in the above embodiment, the frame 1
No. 0 has been described as having three inclined portions 12 having through holes 12A, 12B, 12C formed therein, but the present invention is not limited to the above-described embodiment, and the height thereof is not limited to the above-mentioned embodiment. It can also be applied to one having one or more inclined portions and through holes in the direction and the lateral direction thereof.

In the above embodiment, the closed state of the ventilation window 9 is maintained by the weight of the plate-shaped butterfly valve 20. However, in the case of implementing the present invention, the butterfly valve 20 and the frame body 10 are kept. It can also be used in a structure in which a magnetic material is used for the structure and the closed state is maintained by the attraction force of both.

[0036]

As described above, in the vent duct according to the first aspect of the present invention, the frame body having the ventilation window for discharging the indoor air of the vehicle and the indoor air for discharging the ventilation window in the specific direction can be freely opened and closed. The bottom surface of the lowermost ventilation window provided with the plate-shaped butterfly valve and the butterfly valve of the ventilation window of the frame is taken as the bottom surface, and rises at a predetermined distance from the lower side of the opposite surface. And a height H from the bottom of the ventilation window at the bottom of the ventilation window for discharging the indoor air to the upper surface of the ventilation window at the top and the height h of the water return section. In the above relationship, h / H is set to 0.4 or less.

Therefore, in the case of providing a water return portion that extends to the back surface side of the lowermost through hole and rises upward, if h / H is set to 0.4 or less, a harsh condition will be set. Even in such a case, it is possible to form an optimum structure that prevents the intrusion of water and the like in the most efficient state.

In the vent duct according to the second aspect of the present invention, a frame body having a ventilation window for exhausting indoor air of the vehicle and a plate-like member arranged so as to be openable and closable by the indoor air exhausting the ventilation window in a specific direction are provided. With a butterfly valve, for the frame in the range of movement of the butterfly valve arranged in the uppermost ventilation window,
A rib is provided which comes into contact with the frame body prior to the movement of the butterfly valve.

Therefore, before the butterfly valve hits the upper part of the frame, the open free end of the butterfly valve collides with the tip of the rib, and this collision is part of the butterfly valve made of a relatively soft material and the rib. The tip end collides, the butterfly valve side cannot serve as a vibration source, and the rib side does not serve as a vibration source because an impact is applied from its vertical side. Therefore, the butterfly valve does not collide with the frame and generate a collision noise in any usage state.

In the vent duct according to the third aspect of the present invention, a frame body having a ventilation window for discharging the indoor air of the vehicle and a plate-like member arranged so as to be openable and closable by the indoor air exhausting the ventilation window in a specific direction are provided. With a butterfly valve, in the movement range of the butterfly valve disposed in the uppermost ventilation window, forming a corner so as to start contact from the opening corner of the frame in the movement process of the butterfly valve, The butterfly valve gradually shifts to a large contact state from both sides of the frame.

Therefore, before the butterfly valve hits the upper part of the frame, the open free ends of the butterfly valve come into contact with the insides of the upper two corners, and this contact of the butterfly valve made of a relatively soft material. The contact is gradually deepened from the contact between the end and the two corners, and the butterfly valve does not serve as a vibration source, unlike when the collision occurs on a relatively wide surface of the butterfly valve. Therefore, the butterfly valve does not collide with the frame and generate a collision noise in any usage state.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a vent duct according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a vent duct according to the first embodiment of the present invention.

FIG. 3 is an overall perspective view of a vent duct according to a second embodiment of the present invention.

FIG. 4 is a front view of a main part of a vent duct according to a second embodiment of the present invention.

FIG. 5 is a central longitudinal sectional view of a vent duct according to a third embodiment of the present invention.

FIG. 6 is a characteristic diagram of a vent duct according to a third embodiment of the present invention.

[Explanation of symbols]

 8 water return part 9 ventilation window 10 frame 11 flange 12 (12a, 12b, 12c) inclined part 12A, 12B, 12C through hole 20 (20a, 20b, 20c) butterfly valve

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahiro Gonda, 1 Ochiai, Nagachi, Kasuga-cho, Nishikasugai-gun, Aichi Toyoda Gosei Co., Ltd. Toyoda Gosei Co., Ltd.

Claims (3)

[Claims] 1. A frame body having a ventilation window for exhausting indoor air of a vehicle, a plate-shaped butterfly valve arranged to be opened and closed by the indoor air exhausting the ventilation window in a specific direction, and the frame body. In the vent duct, the bottom surface of the lowermost ventilation window having the butterfly valve of the ventilation window is a bottom surface, and the water return section rises up from the lower surface of the opposite side by a predetermined distance. The relationship between the height H from the bottom of the ventilation window at the bottom of the ventilation window for discharging air to the top of the ventilation window at the top and the height h of the water return section, h / H, is set to 0.4 or less. Vent duct characterized by having done. 2. A vent comprising: a frame body having a ventilation window for exhausting indoor air of a vehicle; and a plate-shaped butterfly valve arranged so as to be openable and closable by the indoor air exhausting the ventilation window in a specific direction. In the duct, a rib is provided, which comes into contact with the frame body in the moving range of the butterfly valve disposed in the uppermost ventilation window, which comes into contact with the frame body earlier than the frame body in the movement process of the butterfly valve. Vent duct. 3. A vent comprising: a frame body having a ventilation window for exhausting indoor air of a vehicle; and a plate-shaped butterfly valve arranged to be opened and closed by the indoor air exhausting the ventilation window in a specific direction. In the duct, in the moving range of the butterfly valve arranged in the uppermost ventilation window, forming a corner so as to start contact from the opening corner of the frame in the moving process of the butterfly valve, A vent duct characterized in that the butterfly valve gradually shifts to a large contact state from both sides.