JPH04110544A - Ventilation device - Google Patents

Abstract

PURPOSE:To prevent contaminated outside air from flowing backward from an internal air discharge outlet into a room by forming a frame structure including a valve seat part with a magnetic attraction force, and forming a one-way valve with a permanent magnet material comprising alloy, metal oxide or internal compound and including a contact part between it and the valve seat part being magnetically attracted to the magnetic attraction material. CONSTITUTION:A frame structure 2 includes an upper and lower two stage inclination wall 21 provided slantingly, an upper and lower two stage vertical wall 23, and a horizontal wall 23 molded integrally together with polyethylene resin 32 containing metal oxide magnetic attraction powder 3. To a contact part 40 between a one-way valve 4 and a valve seat 20 of the same a permanent magnet member 5 is bonded through a bonding agent, and the permanent magnet member 5 is formed with a metal oxide permanent magnet member 5. The one-way valve 4 securely closes an internal air discharge outlet 24 by the aid of magnetic attraction force acting on magnetic attraction powder 3 and contact force between it and the self weight. As the pressure difference between the inside B and outside C of the room exceeds the magnetic attraction force and the self weight of the valve 4, it is separated off from the valve seat part 20 to discharge the internal air R to the outside C of the room.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a ventilation device that ventilates the interior of a car or building, for example, and more specifically, the present invention relates to a ventilation device that ventilates the interior of a car or building, and more specifically, the invention relates to a ventilation device that ventilates the interior of a car or a building. 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 contact the valve seat and close the air outlet when the air is not being discharged outdoors.
It is also smoothed out by the negative pressure generated on the surface of the car body when the car is running, and acts on the one-way 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, resulting in a reduction in the sealing performance of the internal air outlet.

In addition, a one-way valve with a small weight tends to bounce 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 a car is driving in a place where dust tends to rise straight up, and the user of the car needs a ventilation system that can keep the inside air outlet closed in a securely sealed state. There were many requests for .

An object of the present invention is to solve the above-mentioned problem, and to make it possible to keep the inside air outlet closed in a securely sealed state with a one-way valve except when the inside air is being exhausted outside, so that dirty outside air can be exhausted from the inside air. An object of the present invention is to provide a novel ventilation system capable of preventing backflow from an outlet into a room.

[Means for Solving the Problem] In order to achieve the above object, the present invention provides a mouth frame body having an air outlet for discharging indoor air to the outdoors, and a mouth frame body having an indoor air outlet for discharging indoor air to the outdoors. Other than that, contacting the peripheral edge of the inside air exhaust port as a valve seat part to close the inside air exhaust port,
In a ventilation device equipped with a one-way valve that opens the indoor air outlet only in the exhaust pressure direction away from the valve seat when indoor air is discharged to the outside, the ventilator has the following configuration (1).
) to (9) were selected.

(1) In the mouth frame body, at least the valve seat portion is formed of a magnetically attractive material, and in the one-way valve, at least the contact portion with the valve seat portion is made of an alloy or metal oxide that magnetically attracts the magnetically attractive material. A structure formed of a permanent magnet material made of a metal or an intermetallic compound.

(2) In the mouth frame body, at least the valve seat portion is formed of a magnetically attractive material, and the one-way valve has at least the contact portion with the valve seat portion made of an alloy or metal oxide that magnetically attracts the magnetically attractive material. A structure comprising a permanent magnet member made of a metal or an intermetallic compound.

(3) In the mouth frame body, at least the valve seat portion is formed of magnetically absorbing forest material, and the one-way valve has a permanent magnet coating that magnetically attracts the magnetically absorbent material at least in the contact portion with the valve seat portion. Configuration with.

(4) In the mouth frame body, at least the valve seat portion is formed of synthetic resin or rubber containing magnetically attractive powder, and in the one-way valve, at least the contact portion with the valve seat portion is made of the magnetically attractive powder. A structure made of a permanent magnetic material made of an alloy, metal oxide, or intermetallic compound that magnetically attracts the material.

(5) At least the valve seat part of the mouth frame body is formed of synthetic resin or rubber containing magnetically attractive powder, and the one-way valve has at least the magnetically attractive part in contact with the valve seat part. A structure equipped with a permanent magnet member made of an alloy, metal oxide, or intermetallic compound that magnetically attracts the material.

(6) At least the valve seat part of the mouth frame body is formed of synthetic resin or rubber containing magnetically attractive powder, and the one-way valve has at least the magnetically attractive part in contact with the valve seat part. Constructed with a permanent magnetic film that magnetically attracts materials.

(7) The mouth frame body includes a magnetically attractive member on at least the valve seat portion, and the one-way valve is made of an alloy or metal oxide that magnetically attracts the magnetically attractive material at least at the contact portion with the valve seat portion. Or a structure formed of a permanent magnet material made of an intermetallic compound.

(8) At least the valve seat portion of the mouth frame body includes a magnetically attractive member, and the one-way valve includes an alloy or metal oxide that magnetically attracts the magnetically attractive material at least at the contact portion with the valve seat portion. Or a structure equipped with a permanent magnet member made of an intermetallic compound.

(9) At least the valve seat portion of the mouth frame body is provided with a magnetically attractive material, and the one-way valve is provided with a permanent magnet coating that magnetically attracts the magnetically attractive material at least in a contact portion with the valve seat portion. configuration.

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 J contacts the periphery of the inside air outlet, which serves as a valve seat, to close the inside air outlet, except when exhausting inside air to the outside. When the pressure difference between the two and the one-way valve becomes large enough to overcome the magnetic adsorption force of the magnetic adsorption means against the permanent magnet means and the one-way valve's own weight, the inside air outlet is opened only in the direction to exhaust the 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 body.Secondly, this one-way valve The valve is disposed on the outdoor 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 valve excluding the upper end can be used for outdoor work around the mounting part. This one-way valve swings in the direction of opening the indoor air outlet (toward 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) due to its own weight. It is designed to swing in the lateral direction.

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 bottle and a support pipe are rotatably fitted can be used.

Next, the "magnetic adsorptive material", "synthetic resin or rubber containing magnetically adsorptive particles", or "magnetically adsorptive member" of the mouth frame body are at least the inside air outlet as the valve seat part. It only needs to be present on the peripheral edge of the valve seat, and includes not only the case where it is present on the entire valve seat portion but also the case where it is present on a part of the valve seat portion. For example, if the inside air outlet is rectangular, if it exists in a rectangular frame shape around the entire periphery, if it exists in a U-shape on three sides of the periphery, it may be parallel to two sides of the periphery or This includes the case where it exists in an L-shape, the case where it exists in a line segment shape on one side of the periphery, etc.

Examples of the mouth frame body formed of the above-mentioned "magnetic adsorption material" include the following (A)'E-.

(A) The entire mouth frame body is made of ■metals such as iron, cobalt, nickel, and rare earths; ■alloys such as silicon steel, permalloy, and amorphous alloys that may or may not contain these metals; ■also nft ferrite (soft magnetic metal oxides such as ferrite),
Or, (2) also formed from a magnetically attractive material made of an intermetallic metal.

In addition, as the mouth frame body formed from the above-mentioned "synthetic resin or rubber containing magnetically attractive powder," the following (B)
(C) can be exemplified.

(B) The entire mouth frame is molded from a synthetic resin or rubber containing magnetically attractive powder particles made of the metal, alloy, metal oxide, or intermetallic compound.

(C) The valve seat part of the mouth frame is made of synthetic resin or rubber containing magnetically attractive powder made of the metal, alloy, metal oxide or intermetallic compound, and the other parts are made of magnetically attractive powder. The mouth frame is simultaneously molded (so-called two-color molding) using a synthetic resin or rubber that does not contain powder or granules.

Moreover, the following (D) to (F) can be exemplified as the mouth frame body provided with the above-mentioned "magnetic attracting member".

(D) When molding the mouth frame from synthetic resin or rubber,
A magnetically attractive member made of the metal, alloy, metal oxide, or intermetallic compound is inserted into the valve seat.

(E) In the valve seat part of the mouth frame body formed of synthetic resin etc.
An engagement in which a magnetically attractive member made of a synthetic resin or rubber containing magnetically attractive particles made of the metal, alloy, metal oxide, or intermetallic compound is adhered with an adhesive or formed on the valve seat portion. Something that is attached by engaging with a groove.

(F) On the valve seat of the mouth frame body made of synthetic resin,
A magnetically attractive member made of the metal, alloy, metal oxide, or intermetallic compound is attached by bonding with an adhesive and engaging with an engagement groove formed in the valve seat.

In addition, among the above-mentioned examples, in those using magnetically attractive granular material, the content of the magnetically attractive granular material in the synthetic resin or rubber can be, for example, 1 to 6 g/Clll3. Further, the particle size of the magnetically attractive powder can be selected from a range of, for example, 0.1 to 50 μm.

Next, the "permanent magnet material made of alloy, metal oxide or intermetallic compound", "permanent magnet member made of alloy, metal oxide or intermetallic compound", or "permanent magnet coating" of the one-way valve is at least the valve seat. It is sufficient that it is present in the abutting part, and it includes not only the case where it is present in the entire abutting part but also the case where it is present in a part of the abutting part. For example, when contacting the peripheral edge of a rectangular inside air outlet, if the contact part is in a square frame shape over the entire contact part, if it is in a U-shape on three sides of the contact part, the contact part is This includes the case where it exists in parallel or an L-shape on two sides of the contact part, and the case where it exists in the form of a line segment on one side of the contact part.

The following (a) can be exemplified as a one-way valve formed from the above-mentioned "permanent magnetic material made of an alloy, metal oxide, or intermetallic compound."

(a) The entire one-way valve is made of: ■ alloys such as alnico, iron-chromium-cobalt, manganese-aluminum-carbon, etc., ■ metal oxides such as hard ferrite (hard magnetic ferrite such as barium ferrite and strontium ferrite), or ■ A permanent magnet made of an intermetallic compound such as rare earth cobalt. This permanent magnet material is magnetized after molding the one-way valve.

Moreover, the following (bHC) can be exemplified as a one-way valve equipped with a "permanent magnet member made of an alloy, a metal oxide, or an intermetallic compound."

(b) When a one-way valve is molded from synthetic resin or rubber, a permanent magnet member made of the aforementioned alloy, metal oxide, or intermetallic compound is inserted into the abutting portion.

This permanent magnet member is magnetized before or after molding the one-way valve.

(C) A permanent magnet member made of the alloy, metal oxide, or intermetallic compound is adhered to the contact part of a one-way valve made of synthetic resin or the like with an adhesive, or an engagement groove is formed in the contact part. Something that is attached to or engaged with. The permanent magnet means is magnetized before or after attachment to the one-way valve.

Moreover, the following (dHe) can be exemplified as a one-way valve equipped with the above-mentioned "permanent magnet film".

(d) A one-way valve made of synthetic resin or the like, with a paint containing permanent magnet powder made of the alloy, metal oxide, or intermetallic compound applied to the abutting part. The particle diameter of this permanent magnet powder is, for example, 0.1 to 50
It can be selected from a range of μm. Further, the paint can be appropriately selected from among various known paints or improved versions thereof depending on the material for forming the one-way valve.

The content of this permanent magnet powder in the paint is, for example, 1 to 6
g/Cl113.

(e) A permanent magnet material made of the alloy, metal oxide or intermetallic compound is applied to the abutting part of the one-way valve made of synthetic resin or the like by plating, thermal spraying, physical vapor deposition (vacuum deposition, cathode sputtering, ion bubbling, etc.). rating, etc.) or chemical vapor deposition.

The permanent magnet film is magnetized after it is formed into a one-way valve. Further, by overlapping the protective film made of a hard material on the surface of the permanent magnet film, it is possible to prevent the permanent magnet film from being worn out or chipped due to repeated contact with the valve seat.

Examples (A) to (F) of the "permanent magnet means" and examples (a) to (e) of the "magnetic attraction means" can be combined in any manner.

In addition, the "permanent magnetic material", "permanent magnetic member", or "permanent magnetic film" of the one-way valve may be compared to the "magnetic attracting material", "magnetic attracting powder", or "magnetic attracting member" of the mouth frame. It is preferable to set the magnetic attraction force within the range of 2 to 10 g/-. This is because if this magnetic attraction force is so strong that it exceeds this range, the one-way valve will not swing and the internal air outlet will not open due to the effect of the negative pressure that occurs when a car is running, and this magnetic attraction This is because if the force is so weak that it is less than this range, the one-way valve will swing and open the inside air outlet just by the vibrations that occur when the car is running, for example.

[Operation] According to the ventilation device of the present invention, the one-way valve closes the inside air outlet of the mouth frame body except when the inside air is exhausted to the outside. At this time, the permanent magnet material, permanent magnet member present in the abutting part of the one-way valve is compared with the magnetically attractive material, magnetically attractive powder, or magnetically attractive member present in the valve seat part of the mouth frame body. Or, due to the magnetic adsorption force of the permanent magnet film (when the one-way valve's own weight acts on the valve seat, the contact force due to the one-way valve's own weight is also added), the contact part of the one-way valve is attached to the valve seat. It adheres closely while maintaining high sealing performance. Therefore, even if the thickness of the one-way valve is thin, there will be no gap between the one-way valve and the valve seat, and for example, vibrations caused when the car is running will cause the one-way valve to jump up and open the internal air outlet. Not at all. Therefore, it is possible to prevent dirty outside air containing dust, dirt, smoke, odor, etc. from flowing back into the room from the inside air outlet.

Next, when the pressure difference between the indoor and outdoor areas becomes large enough to overcome the magnetic adsorption force and the one-way valve's own weight due to negative pressure generated on the surface of the car body when the car is running, the one-way valve It swings away from the valve seat part toward the outdoor side, and opens the inside air outlet 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.

[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 to 5, 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. 6
The one-way valve 4 is composed of two one-way valves 4 and a member or structure for attaching these members to each other.

Furthermore, the mouth frame body 2 contains magnetically attractive powder 3,
The one-way valve 4 includes a permanent magnet member 5. Details of these components are as follows.

(Duct for Introducing Inside Air) As shown in FIGS. 2 and 4, the duct 1 for introducing inside air extends obliquely downward from the inside air inlet 11 that is open at the upper end, and is further bent to extend laterally. The duct main body 12 and the square frame-shaped flange base 13 provided at the base end of the duct main body 12 for attaching the entire ventilation system to the vehicle body A of the automobile are integrally formed of polypropylene resin. It is something. Inside the base end of the duct body 12, a stepped frame-shaped mounting part 14 is formed for mounting the mouth frame body 2, which will be described in detail next, and a plurality of mounting protrusions 15 are formed in the mounting part 14. There is.

(Mouth frame body) As shown in FIGS. 2 and 4, the mouth frame body 2 has a diameter of about 6 mm.
Two rows of upper and lower sloped walls 21 having an inclination angle of 0 degrees, and two rows of vertical walls 22 connected to the upper end of each sloped wall 21,
A horizontal wall 23 connecting the upper inclined wall 21 and the lower vertical wall 22 is made of metal oxide-based magnetically attractive powder 3 (for example, soft ferrite, particle size 0.8 to 2 μm) for 20 to 20 minutes.
80 vol (volume)% (more preferably 40 to 60 v).

(volume)%> of polypropylene resin 32. Each inclined wall 21 is composed of three rectangular inside air exhaust ports 24 (total six in two stages above and below) lined up in the left-right direction and their peripheral edges 25. Most of the peripheral edges 25 are one way valve 4
constitutes the valve seat portion 20 that comes into contact with the valve seat portion 20. 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 intersect at the center of the inside air outlet 24 and are integrated. Note that each vertical wall 22 has a mounting portion 1 for the inside air introduction duct 1.
A plurality of mounting holes 2 for insertion into the mounting protrusions 15 of 4.
7 and a plurality of mounting protrusions 28 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) As shown in FIGS. 1, 2, etc., the one-way valve 4 is integrally molded from chloroprene rubber as a thin plate having a rectangular shape that is one size larger than the inside air outlet 24 and having a thickness of approximately 0.5 mm. It is what was done.

A plurality of mounting holes 41 are provided at the upper end of the one-way valve 4 for insertion into the mounting projections 28 of the vertical wall 22 of the mouth frame body 2.

A square frame-shaped permanent magnet member 5 is bonded to the contact portion 40 of the one-way valve 4 with the valve seat portion 20 with adhesive (in the figure, it is bonded to the indoor surface of the one-way valve 4). (Although it may be glued to the exterior surface.) The permanent magnet member 5 is made of a metal oxide permanent magnet material (for example, barium ferrite) and has a thickness of about 0.
．． It is molded into a 5° rectangular frame-shaped thin plate.

The one-way valve 4 including this permanent magnet member 5 has a specific gravity of 1.3 to 3.5 (more preferably 1.5 to 3.0). Further, the magnetic attraction force of the permanent magnet member 5 to the magnetically attractive powder 3 is set to about 4 to 7 g/-.

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 mounting 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. As shown in FIG. 5, almost the entire one-way valve 4, except for the upper end attached to the vertical wall 22, is connected to the mounting portion 42 (specifically, the boundary contact between the one-way valve 4 and the lower edge of the retainer 6). The one-way valve 4 is able to swing around the center of the valve 4 due to its own elasticity.

When this one-way valve 4 is not discharging the inside air R to the outside C, the one-way valve 4 uses the contact force acting on the valve seat 20 due to its own weight and the permanent magnet member 5 against the magnetically attractive powder 3.
Due to the magnetic attraction force, the internal air outlet 24 is closed in a securely sealed state, and the pressure difference between indoor B and outdoor C is large enough to overcome the magnetic attraction force and the weight of the one-way valve 4. At times, it is configured to be able to move away from the valve seat portion 20 and swing toward the outdoor side, opening the inside air outlet 24 only in the direction in which the inside air R is discharged to the outside C.

(Operations and effects of the embodiment) According to the ventilation system of the embodiment configured as described above,
The one-way valve 4 closes the inside air outlet 24 of the mouth frame body 2 except when the inside air R is discharged to the outside C. At this time, the contact portion 40 of the one-way valve 4 is connected to the mouth frame body 2.
Not only does it come into contact with the valve seat part 20 due to its own weight,
Due to the magnetic adsorption force between the magnetically attractive powder 3 contained in the valve seat part 20 and the square frame-shaped permanent magnet member 5 provided in the contact part 40, Adheres while maintaining sealing properties. Therefore, even if the one-way valve 4 is thin, the one-way valve 4 and the valve seat 20
There will be no gap between the two, and the one-way valve 4 will not spring up and open the inside air outlet 24 due to vibrations when the vehicle is running. Therefore, dirty outside air containing dust, dirt, smoke, odor, etc. can be prevented from flowing back into the room B from the inside air outlet 24. Furthermore, in this embodiment, the three spanning members 26 provided in the inside air outlet 24 prevent the one-way valve 4 from deforming so as to bite into the inside air outlet 24, so that the generation of the above-mentioned gap is prevented. It will definitely disappear.

Next, when the pressure difference between indoor B and outdoor C becomes large enough to overcome the magnetic attraction force and the weight of the one-way valve 4 due to negative pressure generated on the surface of the vehicle body when the car is running, the one-way valve 4 moves away from the valve seat portion 20 and swings toward the outdoor side (in the direction of arrow S2 in FIG. 5), opening the inside air outlet 24 only in the direction in which the inside air R is discharged to the outside C. Therefore, the inside air R contaminated with cigarette smoke and human exhalation can be discharged to the outside C through the inside air outlet 24.

Also, the pressure difference between indoor B and outdoor C is 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 toward the inside air outlet side (in the direction of arrow S1 in FIG. 5) due to its own weight.
The valve seat 2° is then swung to make close contact with the valve seat portion 2° again.

It should be noted that the present invention is not limited to the configurations of the embodiments described above, and can be embodied with arbitrary changes without departing from the spirit of the invention.

[Effects of the Invention] Since the ventilation device of the present invention is configured as described in claims 1 to 9, the inside air outlet is reliably sealed by the one-way valve except when the inside air is exhausted to the outside. It can be kept closed and has the excellent effect of preventing dirty outside air from flowing back into the room from the inside air outlet.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of essential parts of a ventilation system according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the entire ventilation system, and FIG.
The figure is a front view, FIG. 4 is a sectional view taken along the knee I line in FIG. 3, and FIG. 5 is an enlarged sectional view taken along the line I [-I in FIG. 3. 1... Inside air introduction duct, 2... Mouth frame body, 3...
Magnetic adsorption powder, 4... One-way valve, 5... Permanent magnet member, 20... Valve seat portion, 24...
Inside air exhaust port, 25...Periphery, 40 mountain contact part, B...Indoor, C...Outdoor, R...Inside air. Patent applicant Toyoda Gosei Co., Ltd.

Claims (9)

[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; A ventilator comprising: a one-way valve that closes the exhaust port and opens the inside air exhaust port only in the exhaust direction away from the valve seat portion when indoor air is discharged outdoors; The seat portion is formed of a magnetically attractive material, and the one-way valve is configured such that at least the contact portion with the valve seat portion is made of a permanent magnet material made of an alloy, metal oxide, or intermetallic compound that magnetically attracts the magnetically attractive material. A ventilation device characterized by: 2. 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; A ventilator comprising: a one-way valve that closes the exhaust port and opens the inside air exhaust port only in the exhaust direction away from the valve seat portion when indoor air is discharged outdoors; The seat portion is formed of a magnetically attractive material, and the one-way valve includes a permanent magnet member made of an alloy, a metal oxide, or an intermetallic compound that magnetically attracts the magnetically attractive material, at least in a contact portion with the valve seat portion. A ventilation system characterized by being equipped with. 3. 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; A one-way valve that closes the exhaust port and opens the inside air exhaust port only in the exhaust direction away from the valve seat portion when indoor air is discharged to the outside, wherein the ventilator includes at least the valve. 1. A ventilation device, wherein the seat portion is formed of a magnetically attractive material, and the one-way valve is provided with a permanent magnet coating that magnetically attracts the magnetically attractive material, at least in a contact portion with the valve seat portion. 4. 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; A ventilator comprising: a one-way valve that closes the exhaust port and opens the inside air exhaust port only in the exhaust direction away from the valve seat portion when indoor air is discharged outdoors; The one-way valve has a seat portion made of synthetic resin or rubber containing magnetically attractive powder, and at least the contact portion with the valve seat portion is made of an alloy, a metal oxide, or a material that magnetically attracts the magnetically attractive material. A ventilation device characterized in that it is formed of a permanent magnetic material made of an intermetallic compound. 5. 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; A ventilator comprising: a one-way valve that closes the exhaust port and opens the inside air exhaust port only in the exhaust direction away from the valve seat portion when indoor air is discharged outdoors; The seat portion is formed of synthetic resin or rubber containing magnetically attractive powder, and the one-way valve is made of an alloy, a metal oxide, or a material that magnetically attracts the magnetically attractive material, at least in the contact portion with the valve seat portion. A ventilation device characterized by comprising a permanent magnet member made of an intermetallic compound. 6. 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; A ventilator comprising: a one-way valve that closes the exhaust port and opens the inside air exhaust port only in the exhaust direction away from the valve seat portion when indoor air is discharged outdoors; The seat portion is formed of a synthetic resin or rubber containing magnetically attractive powder, and the one-way valve is provided with a permanent magnet film that magnetically attracts the magnetically attractive material at least in a contact portion with the valve seat portion. A ventilation device characterized by: 7. 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; A ventilator comprising: a one-way valve that closes the exhaust port and opens the inside air exhaust port only in the exhaust direction away from the valve seat portion when indoor air is discharged outdoors; The one-way valve includes a magnetically attractive member on the seat, and at least the contact portion with the valve seat is made of a permanent magnetic material made of an alloy, metal oxide, or intermetallic compound that magnetically attracts the magnetically attractive material. A ventilation system characterized by: 8. 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; A ventilator comprising: a one-way valve that closes the exhaust port and opens the inside air exhaust port only in the exhaust direction away from the valve seat portion when indoor air is discharged outdoors; The seat portion includes a magnetically attractive member, and the one-way valve includes a permanent magnet member made of an alloy, metal oxide, or intermetallic compound that magnetically attracts the magnetically attractive material at least in a contact portion with the valve seat portion. A ventilation system characterized by: 9. 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; A ventilator comprising: a one-way valve that closes the exhaust port and opens the inside air exhaust port only in the exhaust direction away from the valve seat portion when indoor air is discharged outdoors; 1. A ventilation device, wherein the seat portion is provided with a magnetically attractive material, and the one-way valve is provided with a permanent magnet coating that magnetically attracts the magnetically attractive material, at least in a contact portion with the valve seat portion.