JPH04158160A - Ventilation device - Google Patents

Abstract

PURPOSE:To prevent polluted surrounding air from reversing back into an indoor region from an indoor air discharging port of a port frame by a method wherein a one-way valve abuts against a valve seat of the port frame by its own weight other than a time in which the indoor air is discharged out of a room and the one-way valve closes the indoor air discharging port. CONSTITUTION:A one-way valve 4 abuts against a valve seat 20 of a port frame 2 by its own weight other than a time in which an indoor air R is discharged out of a room C and the one-way valve closes an indoor air discharging port 24. An air blowing force of an electric fan 7 is such a weak force as one not to cause the one-way valve 4 to be oscillated. For example, in the event that a thickness of the one-way valve 4 is substantially thin, it is sometimes found that a clearance is generated between the one-way valve 4 and the valve seat 20. However, if the indoor air R is being blown by the electric fan 7 toward the indoor air discharging port 24, the indoor air R blown flows out of the clearance or an opening even if the indoor air discharging port R24 has a clearance or opening, resulting in that the polluted surrounding air is prevented from being reversely flowed back from the clearance or the opening into the indoor region B.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a ventilation device for ventilating the interior of a car or a building, for example, and more specifically, for exhausting dirty indoor air (hereinafter referred to as inside air) to the outside. This relates to the improvement of an internal air exhaust device for the purpose of

[Prior Art] A conventional ventilation device has a vent having an indoor air outlet for discharging indoor air to the outside, as disclosed in, for example, Japanese Utility Model Publication No. 62-9130 and Japanese Patent Application Laid-open No. 59-63221. The frame body contacts the peripheral edge of the inside air exhaust port serving as a valve seat part to close the inside air exhaust port when the inside air is not being discharged to the outside, and is separated from the valve seat part when the inside air is being discharged to the outside. and a one-way valve that opens the inside air outlet only in the exhaust direction.

This one-way valve is formed into a plate shape that is one size larger than the inside air outlet, and is disposed on the outdoor side surface of the mouth frame body, and for example, the upper end of the one-way valve is attached directly above the inside air outlet. As a result, substantially the entire portion excluding the upper end portion is provided to be swingable around the mounting portion. This one-way valve uses its own weight to abut against the valve seat and close the inside air outlet except when exhausting inside air to the outside.
It is caused by the negative pressure generated on the surface of the car body when the car is running, and acts on the one-way valve. When the valve becomes large enough to overcome its own weight, it moves away from the valve seat and swings toward the outdoor side, opening the inside air outlet only in the direction of exhausting inside air to the outside.

This ventilation device is used by being attached to a car, for example, but since the air inside a relatively small car interior is easily contaminated by cigarette smoke and human breath, it is required to have the ability to quickly exhaust the air outside. has been done.

Therefore, in the past, by reducing the thickness of the one-way valve to reduce its own weight, the inside air outlet could be opened even when there was a small pressure difference, and dirty inside air could be efficiently discharged. I try to do that.

[Problems to be Solved by the Invention] However, when the one-way valve is made thinner to reduce its own weight as in the conventional example described above, the contact force against the valve seat portion when the one-way valve closes the inside air outlet becomes weak. At the same time, the edge of the one-way valve becomes easily deformed, resulting in a gap between the one-way valve and the valve seat, which reduces the sealing performance of the internal air outlet.

In addition, a one-way valve with a small weight is likely to bounce up due to the vibrations caused when the vehicle is running, which may cause the inside air outlet to open wide. If the inside air outlet deteriorates in its sealing performance or opens unnecessarily, dirty outdoor air containing dust, dirt, smoke, odors, etc. (hereinafter referred to as outside air) may enter the room from the inside air outlet. This has long been a concern because it can flow back and cause discomfort and anger to people. In particular, this backflow phenomenon occurs conspicuously when automobiles drive in areas where dust particles tend to rise, and many car users have requested a ventilation system that does not cause this backflow phenomenon. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a novel ventilation system that can solve the above problems and prevent dirty outside air from flowing back into the room from the inside air outlet of the mouth frame.

[Means for Solving the Problems] In order to achieve the above object, the ventilation device of the present invention includes a mouth frame body having an inside air outlet for discharging inside air to the outside;
When the inside air is not being discharged to the outside, the valve seat is in contact with the peripheral edge of the inside air exhaust port to close the inside air exhaust port, and when the inside air is being exhausted to the outside, the inside air exhaust port is opened only in the discharge direction. The ventilator equipped with a one-way valve that opens is configured to include an electric fan that blows inside air to the inside air outlet toward the indoor side from the mouth frame body.

Here, the "mouth frame body" includes at least an inside air outlet and its periphery, and includes, for example, the following (1) to (4).
) may be one in which a separate member is added.

(1) A mounting member for attaching the mouth frame to a place where the ventilator is attached (for example, the body of an automobile) is formed integrally with the mouth frame and is added thereto.

(2) The mounting member of (1) above is formed and added as a separate part from the mouth frame body.

(3) A inside air introduction duct for taking in inside air and introducing it to the inside air outlet, or a inside air release duct for releasing inside air discharged from the inside air outlet to the outside, is connected to the mouth frame body. Something that is integrally formed and added.

(4) A device in which the inside air introduction duct or the inside air discharge duct described in (3) above is formed and added as a separate part from the mouth frame body.

Further, the shape of the inside air outlet of the mouth frame body can be appropriately set as necessary, such as a square, a triangle, or a circle.

Similarly, the number of internal air inlets formed and the opening area can be appropriately set as necessary.

Next, the "one-way valve" closes the inside air exhaust port by contacting the peripheral edge of the inside air exhaust port, which serves as a valve seat, except when exhausting inside air to the outside. When the pressure difference between the one-way valve and the one-way valve becomes large enough to overcome the weight of the one-way valve, the one-way valve opens the inside air outlet only in the direction to discharge inside air to the outside. Therefore, firstly, this one-way valve is formed to be slightly larger than the inside air outlet so that it can come into contact with the valve seat of the mouth frame. Second, the one-way valve is disposed on the outdoor side surface of the mouth frame body, and for example, the upper end of the one-way valve is installed directly above the inside air outlet, so that almost the entire part except for the upper end is installed. It is provided so as to be swingable about the mounting portion. This one-way valve swings in the direction of opening the indoor air outlet (towards the outdoor side) due to the pressure difference between indoors and outdoors, while it swings in the direction of closing the indoor air outlet (toward the indoor air outlet side) due to its own weight. It is designed to oscillate.

Examples of the material for this one-way valve include metal, synthetic resin, and rubber. Moreover, the following (1) and (2) can be exemplified as the swing structure of the one-way valve.

(1) The one-way valve, including the part that is the center of its swing, is integrally formed of elastomer (a rubber-like soft synthetic resin) or rubber, and is swung using the flexibility of its elasticity. structure. In this case, the rocking resistance can be reduced by forming the part that is the center of rocking to be thinner than other parts.

(2) A structure in which the swinging center of the one-way valve is constructed from a separate hinge member. As this hinge member, for example, one in which a support pin and a support pipe are rotatably fitted can be used.

Next, the above-mentioned "electric fan" only needs to be provided on the indoor side of the mouth frame, and the following (1) and (2) can be exemplified as specific mounting positions and mounting methods. .

(1) An electric fan is installed independently immediately on the indoor side of the mouth frame.

(2) When the mouth frame body is formed with the inside air introduction duct, an electric fan is attached to the entrance, midway, or exit of the inside air introduction duct by screwing, gluing, welding, or the like.

Further, this "electric fan" may be any fan as long as it can blow inside air to the inside air outlet, and examples of its type and structure include a propeller fan and a sirocco fan in which an impeller is rotated by an electric motor.

Moreover, the air force of this "electric fan" can be set as follows.

To generate a weak blowing force that does not cause the one-way valve to swing except when discharging indoor air to the outside.

When discharging indoor air outdoors, either 1. generate a weak blowing force that does not cause the one-way valve to swing, or 2. generate a strong blowing force that causes the one-way valve to swing.

The control circuit for this "electric fan" is as follows (1) (
2) can be exemplified.

(1) For example, in a car ventilation system, a circuit using a switch for switching between outside air intake and internal air circulation or a switch linked to a blower switch.

(2) A sensor that detects dirt components such as dust, dirt, smoke, and odor in the outside air, and when the sensor detects the dirt components, it determines that it is not the time to exhaust inside air to the outside and turns on the electric fan. A control circuit comprising a judgment and output circuit that reduces the current flowing through the electric fan, and when the sensor does not detect a dirt component, determines that it is time to discharge indoor air to the outside and increases the current flowing through the electric fan. For this judgment and output circuit, for example, a relay control circuit, an electronic control circuit, a microcomputer control circuit, etc. can be used.

In addition, at least the valve seat portion of the mouth frame body and at least the contact portion of the one-way valve with respect to the valve seat portion,
It is preferable to provide means for magnetically attracting the valve seat portion and the contact portion to improve the adhesion between the two. This “means”
As examples, the following combinations (1) to (3) can be exemplified.

(1) A permanent magnet means or an electromagnet means provided on at least the valve seat part (including a part thereof; the same applies hereinafter) of the mouth frame body, and at least a contact part (including a part thereof) of the one-way valve. (hereinafter the same shall apply).

(2) Magnetic attraction means provided on at least the valve seat portion of the mouth frame body, and permanent magnet means or electromagnetic means provided on at least the contact portion of the one-way valve.

(3) Permanent magnet means or electromagnet means provided at least on the valve seat portion of the mouth frame body, and permanent magnet means or electromagnet means provided on at least the contact portion of the one-way valve.

[Function] In the ventilator of the present invention, the one-way valve contacts the valve seat portion of the mouth frame body due to its own weight to close the inside air outlet when the inside air is not being discharged to the outside. The force blown by the electric fan at this time may be set to a weak force that does not cause the one-way valve to swing, as described above. At this time, for example, if the thickness of the one-way valve is quite thin, there may be a gap between the one-way valve and the valve seat, and for example, if the one-way valve is affected by severe vibrations when the car is running. In some cases, the one-way valve may pop up and open the internal air outlet.

However, if the inside air is blown to the inside air outlet by an electric fan as mentioned above, even if there is a gap or opening in the inside air outlet as described above, the blown inside air will flow outside through the gap or opening. Since it flows out, it is possible to prevent dirty outside air from flowing back into the room through the gap or opening.

Next, when the pressure difference between the indoor and outdoor areas becomes large enough to overcome the weight of the one-way valve due to negative pressure generated on the surface of the car body when the car is running, for example, the one-way valve moves away from the valve seat to the outdoor side. The inside air outlet opens only in the direction of exhausting the inside air to the outside. Therefore, the indoor air contaminated with cigarette smoke and human exhalation can be discharged to the outside from the indoor air outlet. At this time, the electric fan operates as follows.

■If the blowing force of the electric fan at this time is a weak force that does not cause the one-way valve to swing, add this blowing force to the pressure difference and swing the one-way valve greatly to improve the efficiency of inside air exhaust. can be increased. Moreover, this blown air can prevent dirty outside air from flowing back into the room through the gaps or openings.

■If the force being blown by the electric fan at this time is strong enough to cause the one-way valve to swing, the one-way valve may be swung by this force even if the pressure difference is insufficient. , the internal air can be forced out. Moreover, this blown air can prevent dirty outside air from flowing back into the room through the gaps or openings.

[Example] Hereinafter, an example in which the present invention is embodied in an automobile exhaust system will be described with reference to the drawings.

As shown in Figures 1 and 2, this ventilation system includes a duct 1 for introducing inside air to take in inside air R from the interior B of the automobile and introduce it to the next inside air outlet, and a duct 1 for introducing inside air to the outside C. A mouth frame body 2 comprising six inside air exhaust ports and their peripheral edges for discharging the inside air, and a mouth frame body 2 that is attached to the mouth frame body 2 so as to open the inside air exhaust ports only when exhausting inside air R to the outdoors C. It is composed of six one-way valves 4, two electric fans 7 attached to the inside air inlet of the inside air introduction duct, and a member or structure for attaching these members to each other. Further, the mouth frame body 2 contains a permanent magnet powder 3, and the one-way valve 4 contains a magnetically attractive powder 5. Details of these components are as follows.

(Duct for Introducing Inside Air) The duct 1 for introducing inside air extends diagonally downward from the inside air inlet 11 opened at the upper end, and further includes a duct body 12 that is bent and extends laterally, and a base end of the duct body 12. A rectangular frame-shaped flange base 13 for attaching the entire ventilation system to the vehicle body A of an automobile is integrally formed of polypropylene resin. A stepped frame-shaped mounting portion 14 is formed inside the base end of the duct body 12 for mounting the mouth frame body 2, which will be described in detail below.
A plurality of attachment protrusions 15 are formed on the attachment portion 14 .

(Mouth Frame Body) The mouth frame body 2 includes two levels of upper and lower sloped walls 21 having an inclination angle of about 60 degrees, and three rows of vertical walls 22 connected to the upper and lower ends of each sloped wall 21. The horizontal wall 23 connecting the upper inclined wall 21 and the vertical wall 22 in the center row is made of metal oxide permanent magnet powder 3 (for example, hard ferrite manufactured by Toda Kogyo Co., Ltd., product number FS-). 317, powder particle size 0.
8-2 μm) in an amount of 20-80 vol% (more preferably 40-60 vol%).

Each inclined wall 21 is composed of three (total six in total, two stages above and below) rectangular inside air exhaust ports 24 arranged in the left-right direction and their peripheral edges 25.

Most of this peripheral portion 25 constitutes a valve seat portion 20 against which the one-way valve 4 comes into contact. Furthermore, between the diagonally opposite corners of each of the inside air exhaust ports 24 and between the center of the upper side and the center of the lower side, a total of three spanning members 26, which the one-way valve 4 contacts, are connected to the peripheral edge 25. These spanning members 26 are constructed by integrally molding the inside air outlet 24.
They intersect with each other and are integrated at the center.

The permanent magnet powder 3 in the mouth frame 2 is magnetized after the mouth frame 2 is molded, and its magnetic force is 30 to 2000 G (Gauss) (more preferably 100 to 200 G).

Incidentally, a plurality of mounting holes 27 are formed in the vertical walls 22 of the upper and lower rows of the mouth frame body 2 for insertion into the mounting protrusions 15 of the mounting portion 14 of the inside air introduction duct 1. A plurality of mounting protrusions 28 are formed on the vertical wall 22 in the center row for mounting one-way valves 4, which will be described in detail later.

The mouth frame body 2 configured as described above is attached to the attachment portion 14 of the inside air introduction duct 1 in the following manner. That is, the opening frame body 2 is inserted into the mounting portion 14 from the outdoor side.
The mounting protrusion 15 of the mounting portion 14 is attached to the vertical wall 22.
into the mounting hole 27 of. Next, the top of the attachment protrusion 15 is heated and melted to fuse or attach to the vertical wall 22, thereby attaching the mouth frame 2 so that it will not come off. Note that the mouth frame body 2 is attached after the following six one-way valves 4 are attached to the mouth frame body 2.

(One-way valve) The one-way valve 4 is made of metal oxide-based magnetically attractive powder 5 (e.g., soft ferrite, powder particle size 0.8 to 2.
chloroprene rubber containing 20 to 80 vol% (more preferably 40 to 60 vol%) of It is molded.

At the upper end of this one-way valve 4, the vertical wall 22
A plurality of mounting holes 41 for insertion into the mounting protrusions 28 of the
is provided.

The one-way valve 4 has a specific gravity of 1.3 to 3.5 (more preferably 1.5 to 3.0).

Further, the force with which the magnetically attractive powder 5 contained in the contact portion 40 of the one-way valve 4 magnetically attracts the permanent magnet powder 3 contained in the valve seat portion 20 is approximately 4 to 7 g. /a
(It is set to

The one-way valve 4 configured as described above is attached to the outdoor side surface of the mouth frame body 2 in the following manner. That is, first, the one-way valve 4 is placed on the inclined wall 21 from the outdoor side so as to close the inside air outlet 24, and the mounting protrusion 28 of the vertical wall 22 is inserted into the mounting hole 41 at the upper end of the one-way valve 4. Next, a retainer 6 formed of polypropylene resin into an elongated plate shape is attached to the upper end of the one-way valve 4, and the retainer 6
The mounting protrusion 28 of the vertical wall 22 is inserted into the mounting hole 61 of the vertical wall 22 . Subsequently, the top of the attachment protrusion 28 is heated and melted to fuse or attach it to the retainer 6, thereby attaching the upper end of the one-way valve 4 and the retainer 6 to the vertical wall 22 so that they will not come off.

Therefore, as shown in FIG. 4, substantially the entire one-way valve 4, excluding the upper end portion attached to the vertical wall 22, is centered around the mounting portion 42.
It is able to swing due to its own elasticity.

When this one-way valve 4 is not discharging the inside air R to the outside C, the inside air exhaust port 2
are closed with a secure seal, and indoor B and outdoor C
When the pressure difference between the valve seat portion 2 and the one-way valve 4 becomes large enough to overcome its own weight and the magnetic attraction force,
It is configured so that the inside air outlet 24 can be opened only in the direction in which the air outlet 24 is swung away from zero and toward the outdoor side, and the inside air R is discharged to the outside C.

(Electric fan) The electric fan 7 includes a frame 71 and a frame 71.
an electric motor 72 attached to the
This is a propeller fan composed of a propeller-shaped impeller 73 that is rotationally driven by a propeller-shaped impeller 73. This electric fan 7 is
Two of them are attached to the inside air inlet 11 at the upper end of the inside air introduction duct 1. A control circuit (not shown) using the sensor etc. generates a strong blowing force that swings the one-way valve 4 when discharging the indoor air R to the outdoor C. for,
The one-way valve 4 is designed to generate a weak blowing force that does not cause it to swing.

Note that when installing the electric fan 7 in the inside air introduction duct 1 as in this embodiment, it is important to note that when the electric fan is not rotating or the electric fan's blowing force is weak, the inside air cannot be brought outside. In consideration of situations where it is necessary to discharge the inside air (for example, when releasing the increased pressure of inside air that occurs at the moment the door is closed), an area at the inside air inlet 11 for the inside air to pass through is secured. That's true.

Further, as shown by the chain line in FIG. 1, the electric fan 7 can be installed inside the inside air introduction duct 1 so as to face the inside air outlet 24, or can be installed directly on the indoor side surface of the mouth frame 2. You can also

(Operations and effects of the embodiment) In the ventilation system of the embodiment configured as described above,
When the inside air R is not being discharged to the outside C, the one-way valve 4 contacts the valve seat 20 of the mouth frame body 2 due to its own weight to close the inside air outlet 24. The force blown by the electric fan 7 at this time is so weak that the one-way valve 4 does not swing. At this time, for example, one-way valve 4
If the one-way valve 4 is quite thin, a gap may be created between the one-way valve 4 and the valve seat 20, and if the one-way valve 4 is affected by severe vibrations during driving, for example,
The one-way valve 4 may jump up and open the inside air outlet 24.

However, as mentioned above, the electric fan 7
If the inside air R is being blown to the inside air outlet R as shown above,
Even if a gap or opening occurs in 24, this blown inside air R will flow out from the gap or opening to the outside C, preventing dirty outside air from flowing back into the room B from the gap or opening. can do.

Furthermore, the contact part 40 of the one-way valve 4 of this embodiment not only contacts the valve seat part 20 of the mouth frame body 2 and the three spanning members 26 by its own weight, but also The magnetically attractive powder 5 is magnetically attracted to the permanent magnet powder 3 contained in the valve seat part 20 and the spanning member 26, so that it is attracted to the valve seat part 20 and the spanning member 26. It adheres closely while maintaining high sealing performance. Therefore, the possibility that each inside air outlet 24 will form a gap or open as described above is extremely low.

Next, when the pressure difference between the indoor B and outdoor C becomes large enough to overcome the weight of the one-way valve 4 due to negative pressure generated on the surface of the car body when the car is running, for example, when the one-way valve 4 or the valve seat 20 away from the outdoor side (first
The inside air outlet 24 opens only in the direction of exhausting the inside air R to the outside C. Therefore, the inside air R contaminated with cigarette smoke and human breath is removed from the inside air outlet 2.
4 to outside C. The force blown by the electric fan 7 at this time is a strong force that causes the one-way valve 4 to swing, so even if the pressure difference is insufficient, the one-way valve 4 is oscillated by this force, The internal air R can be forcibly discharged. In addition, due to this blowing force, dirty outside air is forced into the room B through the gaps and openings.
This can prevent the water from flowing backwards.

Next, the pressure difference between indoor B and outdoor C is the one-way valve 4.
When the weight of the one-way valve 4 becomes smaller than its own weight, the one-way valve 4 moves to the inside air outlet side (in the direction of arrow S1 in Fig. 1) due to its own weight.
The valve seat 20 is then swung back to the valve seat portion 20 and comes into close contact with the valve seat portion 20 again.

It should be noted that the present invention is not limited to the configuration of the above-mentioned embodiments, and can be modified and embodied as desired without departing from the spirit of the invention.

[Effect of the invention 1 Since the ventilation system of the present invention is configured as described above,
This provides an excellent effect of preventing dirty outside air from flowing back into the room from the inside air outlet of the mouth frame body.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a ventilation system according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the entire ventilation system. 1... Inside air introduction duct, 2... Mouth frame body, 4...
One-way valve, 7... Electric fan, 20... Valve seat, 24... Internal air outlet, 25... Peripheral part, B.
...Indoors, C...Outdoors, R...Inside. Patent applicant Toyoda Gosei Co., Ltd.

Claims (1)

[Claims] 1. A mouth frame body having an inside air outlet for discharging indoor air to the outside; and a mouth frame body having an indoor air outlet for discharging indoor air to the outside; In a ventilator equipped with a one-way valve that closes the exhaust port and opens the indoor air exhaust port only in the exhaust direction away from the valve seat when indoor air is discharged outdoors, . A ventilation device comprising an electric fan that blows inside air to the inside air outlet.