JPH04110543A - Ventilation device - Google Patents

Abstract

PURPOSE:To prevent contaminated outside air from flowing out of an internal discharge outlet into a room by providing a frame structure including a magnetic attraction coated film on a valve seat part thereof, and a one-way valve including permanent magnet means magnetically attracted to the magnet attraction coated film at a contact part between the valve seat and it. CONSTITUTION:A one-way valve 4 is mounted on the surface of a frame structure 4 outside a room, and is closed, securely sealing an internal air discharge outlet 24 by the aid of contact force acting on a valve seat part 20 by the self weight thereof, and of magnetic attraction force of a permanent magnet film 3. Accordingly, the internal air discharge outlet 24 is not opened because of the one-way valve 4 springing up owing to vibration produced upon an automobile running, and hence contaminated outside air is prevented from flowing backward from the internal air discharge outlet 24 into the room B. As the pressure difference between the inside B and outside C of the room exceeds the self weight of the valve 4 and the magnetic attraction force owing to negative pressure produced upon an automobile surface upon its running, the valve 4 is separated off from the valve seat part 20 to open the internal air discharge outlet 24. Thus, contaminated inside air R is discharged from the internal air discharge outlet 24 to the outside C of the room.

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. 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 except the upper end portion is swingable about 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 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. ) 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, conventionally, by reducing the thickness of the Funway valve to reduce its own weight, the inside air outlet can be opened even when there is a small pressure difference, and the dirty inside air can be efficiently removed. I'm trying to drain it.

[Problems to be Solved by the Invention] However, if the one-way valve is made thinner to reduce its own weight as in the conventional example described above, the force of contact with the valve seat when the one-way valve closes the internal air outlet decreases. As the one-way valve becomes weaker, the edge of the one-way valve becomes more 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 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 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 backwards and cause discomfort 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 one.

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 reliably sealed state with a Funway valve except when the inside air is exhausted to the outside, so that the dirty outside air can be removed from the inside air. An object of the present invention is to provide a novel ventilation device capable of preventing backflow from an outlet into a room.

[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. In the ventilator equipped with a one-way valve that opens, the mouth frame body includes a magnetically absorbent film on at least the valve seat portion, and the one-way valve includes the magnetically absorbent film on at least the portion that contacts the valve seat portion. The structure is equipped with permanent magnet means for magnetic attraction.

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 two and the one-way valve becomes large enough to overcome the magnetic adsorption force of the permanent magnet means against the magnetic adsorption film and the one-way valve's own weight, the inside air outlet is opened only in the direction of exhausting inside air to the outside. It has unidirectional opening. 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, this 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 attached directly above the inside air outlet, so that almost the entire valve except for the upper end is 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, and swings in the direction of closing the indoor air outlet (toward the indoor air outlet side) due to its own weight. It is supposed to be done.

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 "magnetic adsorption film" of the mouth frame body only needs to be provided at least on the peripheral edge of the inside air outlet serving as the valve seat, and only when it is provided on the entire valve seat. It also includes cases where the valve seat is provided in a part of the valve seat. For example, if the inside air outlet is rectangular, if it is provided in a rectangular frame shape around the entire periphery, if it is provided in a U-shape on three sides of the periphery, then if it is provided in a U-shape on three sides of the periphery, two sides of the periphery This includes cases in which they are provided in parallel or in an L-shape, cases in which they are provided in a line segment shape on one side of the peripheral edge, and the like.

This "magnetic adsorption film" is formed of a material that magnetically attracts the permanent magnet means described below.
) (8) can be exemplified.

(A) In the valve seat part of the mouth frame body formed of synthetic resin etc.
■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, ■Metal oxides such as soft ferrite (soft magnetic ferrite), or , ■A coating film made by applying a paint containing magnetically absorbing powder particles also made of an intermetallic compound.

The particle diameter of this magnetically attractive powder is, for example, 0. 1-5
It can be selected from a range of 0 μm. Further, the paint can be appropriately selected from among various known paints or improved versions thereof depending on the material for forming the mouth frame. The content of this magnetically absorbing powder in the paint is, for example, 1 to 6
g/cm3.

(B) In the valve seat part of the mouth frame body formed of synthetic resin etc.
A film formed by plating, thermal spraying, physical vapor deposition (vacuum deposition, cathode sputtering, ion blating, etc.) or chemical vapor deposition of a magnetically attractive material made of the metal, alloy, metal oxide, or intermetallic compound.

Further, by overlapping the protective film made of a hard material on the surface of the magnetically attractive film, it is possible to prevent the magnetically attractive film from being worn out or chipped due to repeated contact with the one-way valve.

Next, the "permanent magnet means" of the one-way valve only needs to be provided at least in the abutting part with the valve seat part, and it is not limited to the case where it is provided in the entire abutting part. This also includes cases where it is provided in a part of the For example, when contacting the periphery of a rectangular internal air outlet, if the contact part is provided in a square frame shape over the entire contact part, it may be provided in a U-shape on three sides of the contact part. In this case, it includes a case where it is provided in parallel or an L-shape on two sides of the abutting part, and a case where it is provided in a line segment shape on one side of the abutting part. Examples of this "permanent magnet means" include the following (a) to (g).

(a) The entire one-way valve is made of: ■ an alloy such as alnico, iron-chromium-cobalt, manganese-aluminum-carbon, etc., ■ metal oxide such as hard ferrite (hard magnetic ferrite such as barium ferrite, strontium ferrite), or ■ It is formed from a permanent magnet material made of an intermetallic compound such as rare earth cobalt. The permanent magnet means may be magnetized either before or after the one-way valve is formed.

(b) The entire one-way valve is molded from synthetic resin or rubber (so-called bonded magnet) containing permanent magnet powder made of the aforementioned alloy, metal oxide, or intermetallic compound. This permanent magnet means is magnetized after the one-way valve is molded.

(C) The contact part of the one-way valve is made of synthetic resin or rubber containing permanent magnet powder made of the alloy, metal oxide or intermetallic compound, and the other parts are made of permanent magnet powder. The one-way valve is simultaneously molded (so-called two-color molding) using a synthetic resin or rubber that does not contain the same. This permanent magnet means is magnetized after the one-way valve is molded.

(d) 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 contact portion.

The permanent magnet means is magnetized before or after molding the one-way valve.

(e) Glue a permanent magnet member made of synthetic resin or rubber containing permanent magnet powder made of the alloy, metal oxide, or intermetallic compound to the contact part of the one-way valve made of synthetic resin, etc. It is attached by adhering with adhesive or by engaging with the engagement groove formed in the corresponding joint. The permanent magnet means is magnetized before or after attachment to the one-way valve.

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

(()) A one-way valve made of synthetic resin or the like, with a permanent magnet film made of the alloy, metal oxide, or intermetallic compound formed on the abutting part.

Methods for forming this permanent magnet film include: (1) applying a paint containing permanent magnet powder made of the above alloy, metal oxide, or intermetallic compound; Examples of methods include plating, thermal spraying, physical vapor deposition, or chemical vapor deposition of the permanent magnet material. This permanent magnet means is magnetized after being formed into a one-way valve.

In addition, among the above examples, in those using permanent magnet powder, the content of the permanent magnet powder in the synthetic resin, rubber, or paint can be, for example, 1 to 6 g/cm<3>. Further, the particle size of the magnetically attractive powder can be selected from a range of, for example, 0.1 to 50 μm.

The examples (A) and (B) of the above-mentioned "magnetic adsorption film" and the examples (a) to (g) of the "permanent magnet means" can be combined in any way.

Further, it is preferable that the magnetic attraction force of the permanent magnet means to the magnetic attraction film be set 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 too weak to fall within this range, the Funway valve will swing and open the inside air outlet just by the vibrations that occur when the car is running, for example.

[Function] According to the ventilation device of the present invention, the one-way valve closes the inside air outlet of the mouth frame except when the inside air is exhausted to the outside. At this time, due to the force of magnetic attraction of the permanent magnet means provided at the abutting part of the one-way valve to the magnetically attractive coating provided on the valve seat part of the mouth frame body (the dead weight of the one-way valve is (When acting on the valve, the contact force due to its own weight is also added.) The contact portion of the Funway valve closely contacts the valve seat portion while maintaining a 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 flip up and open the inside air outlet. There's no need to put it away.

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 moves to the valve seat. The indoor air outlet opens only in the direction in which the indoor air is discharged outdoors.

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 applied to 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 equipped with six inside air exhaust ports and their peripheral edges for discharging, and 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.

Further, the mouth frame body 2 is provided with a magnetically attractive film 3, and the Funway valve 4 is provided with a permanent magnet powder 5 as a permanent magnet means. 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 opened 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 integrally molded from polypropylene resin. Each inclined wall 21 is composed of three rectangular inside air exhaust ports 24 (total of six in two stages above and below) aligned in the left and right direction and their peripheral edges 25. Valve support frames 26 extending radially from the center to the peripheral edge 25 at intervals of about 60 degrees are integrally formed with the peripheral edge 25. This peripheral part 2
Most of 5 is the valve seat part 20 that the one-way valve 4 comes into contact with.
It consists of Each vertical wall 22 has a plurality of mounting holes 27 for inserting and mounting the mounting protrusion 15 of the mounting portion 14 of the inside air introduction duct 1, and a plurality of mounting holes 27 for mounting the one-way valve 4, which will be described in detail later. A protrusion 28 is formed.

As shown in FIG. 5 etc., a rectangular frame-shaped magnetic adsorption film 3 surrounding each internal air outlet 24 is formed on the valve seat portion 20.
A one-way valve 4 is brought into contact with the exposed surface of this magnetically attractive film 3.

This magnetic adsorption film 3 is made of a metal oxide-based magnetic adsorption powder 31 (for example, soft ferrite, powder particle size 0.8 to 2.
This is a coating film formed by applying a paint 32 containing .mu.m>.

The 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 and 2, the one-way valve 4 includes a metal oxide permanent magnet powder 5 (for example, hard ferrite manufactured by Toda Kogyo Co., Ltd., product number FS-31).
7. 20 to 80 vol (powder particle size 0.8 to 2 μm) (
volume)% (more preferably 40-60VO1 (volume)%
) It is integrally molded from the contained chloroprene rubber 52 as a rectangular thin plate approximately 0.5 porcelain thick, which is one size larger than the inside air outlet 24. The permanent magnet powder 5 in this one-way valve 4 is
After molding, it is magnetized at a pitch of 51TIIT1, and its magnetic force is 30 to 2000G (Gauss) (more preferably 100 to 200G). A plurality of mounting holes 41 are provided for insertion into the mounting protrusions 28 of the wall 22.

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

Further, the magnetic adsorption force of the permanent magnet powder 5 in the Funway valve 4 to the magnetic adsorption film 3 of the mouth frame body 2 is set to about 4 to 7 g/cd.

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 made of polypropylene resin is formed into an elongated plate shape.
is placed on the upper end of the one-way valve 4, and the mounting protrusion 28 of the vertical wall 22 is inserted into the mounting hole 61 of the retainer 6. Subsequently, the top of the mounting protrusion 28 is heated and melted to fuse or attach to the retainer 6, thereby attaching the upper end of the one-way valve 4 and the retainer 6 to the vertical wall 22.
Attach it so that it does not come off.

Therefore, as shown in FIG. 5, almost the whole of this fun-way valve 4, excluding the upper end attached to the vertical wall 22, is connected to the mounting portion 42 (more specifically, the one-way valve 4 and the lower edge of the retainer 6). The one-way valve 4 can swing around the boundary contact portion) 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 part 20 due to its own weight and the permanent magnet powder 5 against the magnetic adsorption film 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,
A rectangular frame-shaped magnetic adsorption coating 3 provided on the valve seat portion 20
The permanent magnet powder 5 contained in the contact portion 40 is in close contact with the valve seat portion 20 while maintaining a high sealing property due to the magnetic adsorption force. 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 radial valve support frame 26 provided inside the inside air outlet 24 prevents the one-way valve 4 from being deformed so as to bite into the inside air outlet 24, so that the above-mentioned gap is less likely to occur. 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 from 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 part 20 is again brought into close contact with the valve seat part 20.

It should be noted that the present invention is not limited to the configuration of the above-mentioned embodiments, and can be embodied by changing the designations to the appointed officials without departing from the spirit of the invention.

[Effects of the Invention] Since the ventilation system of the present invention is configured as described above,
When not exhausting inside air to the outside, the inside air outlet can be kept closed with a one-way valve in a securely sealed state, preventing dirty outside air from flowing back into the room from the inside air outlet. It has excellent effects.

[Brief explanation of drawings]

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 line 1 in FIG. 3, and FIG. 1... Inside air introduction duct, 2... Mouth frame body, 3...
Magnetic adsorption film, 4... one-way valve, 5...
Permanent magnet member as permanent magnet means, 20... Valve seat part, 24... Internal air outlet, 25... Peripheral part, 31...
・Magnetic adsorption powder, 32...Paint, 40...Contact part, B...Indoor, C...Outdoor, R...Inside air. Figure 4 Figure 5

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; 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 system, wherein a seat portion is provided with a magnetically attractive coating, and the one-way valve is provided with permanent magnet means for magnetically adhering to the magnetically attractive coating at least at a portion in contact with the valve seat portion.