JPH04110538A - Ventilation device - Google Patents

Abstract

PURPOSE:To prevent contaminated outside air from flowing backward from an internal air discharge outlet into a room by providing a frame structure including magnet means on a valve seat part thereof, and a one-way valve including magnetic attraction means magnetically attracted to the electromagnet means at a contact part between the valve seat part and it. CONSTITUTION:A one-way valve 4 is mounted on the surface of a frame structure outside a room, and is closed, securely sealing an internal 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 magnetic attraction powder 5 to an electromagnet member 3, excepting when internal air R is discharged to the outside C of the room. It is, therefore, eliminated the possibility of the internal air discharge outlet 24 being opened because of the 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. When a sensor 73 of a control circuit 7 does not sense any contamination in fresh air, a current flowing through a coil 32 of the electromagnet member 3 is shut off and demagnetized. When a pressure difference between the inside B and outside C of the room exceeds the self weight of the valve 4, the valve 4 is separated off from the valve seat part 20 to discharge the internal air R to the outside C of the room 25 peripheral part 31 magnetic core material.

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.

The 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.

[Problem H to be solved by the invention] However, when the one-way valve is made thinner to reduce its own weight as in the above conventional example, the contact force against the valve seat when the one-way valve closes the inside air exhaust port 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 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 backwards and cause discomfort to people. In particular, this backflow phenomenon occurs conspicuously when a car is driving in a place where there is a slope of sand and dust. There were many requests for equipment.

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 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 an electromagnetic means at least at the valve seat, and the fun-way valve is magnetically attracted to the electromagnetic means at least at a contact portion with the valve seat. The structure is equipped with magnetic adsorption means.

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 magnetic adsorption means against the electromagnetic means and the self-weight of the one-way valve, the one-way opening opens the inside air outlet only in the direction to discharge inside air to the outside. It is a thing with a nature. 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. Secondly, 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 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, 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 of the Funway 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 "electromagnetic means" of the mouth frame may be provided at least on the peripheral edge of the internal air outlet serving as the valve seat, and is not limited to the case where it is provided on the entire valve seat. , including cases where it 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 "electromagnet means" consists of various combinations of magnetic cores and coils, and the following (^) to (G) can be exemplified.

(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, and ■soft ferrite (soft magnetic metal oxides such as ferrite),
or ■ It is also formed from a magnetic core material made of intermetallic metal, the body facing the mouth frame is used as the magnetic core, and a coil made of a conductive wire such as copper wire, aluminum wire, etc. is attached to the mouth frame. thing.

(8) The entire mouth frame body is molded from synthetic resin or rubber containing magnetic core particles made of the metal, alloy, metal oxide, or intermetallic compound, and the mouth frame body itself serves as a magnetic core. The coil is attached to the mouth frame body. This coil is installed by inserting it during molding of the mouth frame body, or after molding.

(C) The valve seat part of the mouth frame is made of synthetic resin or rubber containing magnetic core powder made of the metal, alloy, metal oxide or intermetallic compound, and the other parts are made of magnetic core powder. Using a synthetic resin or rubber that does not contain any of What will become. This coil is installed by inserting it during molding of the mouth frame body, or after molding.

(D) When molding the mouth frame from synthetic resin or rubber,
A magnetic core member as a magnetic core made of the metal, alloy, metal oxide, or intermetallic compound is inserted into the valve seat portion, and the coil is attached to the magnetic core member. This coil is installed before or after inserting the magnetic core member.

(E) In the valve seat part of the mouth frame body formed of synthetic resin, etc.
A magnetic core member made of synthetic resin or rubber containing magnetic core particles made of the metal, alloy, metal oxide, or intermetallic compound is bonded with an adhesive and engaged with an engagement groove formed in the valve seat portion. The coil is attached to the magnetic core member. This coil is installed before or after the magnetic core member is installed.

(F) On the valve seat of the mouth frame body made of synthetic resin,
The magnetic core member made of the metal, alloy, metal oxide, or intermetallic compound is attached by bonding with an adhesive or engaging with an engagement groove formed in the valve seat, and the coil is attached to the magnetic core member. What happens when you put it on. This coil is installed before or after the magnetic core member is installed.

(G) In the valve seat part of the mouth frame body formed of synthetic resin etc.
A magnetic core coating made of the metal, alloy, metal oxide, or intermetallic compound is formed, and the coil is attached to the valve seat.9 The method for forming this magnetic core coating is as follows: A method of applying a paint containing a magnetic core powder made of an oxide or an intermetallic compound, or a method of plating, thermal spraying, physical vapor deposition, or chemical vapor deposition of a magnetic core material made of the metal, alloy, metal oxide, or intermetallic compound. A method can be exemplified.

In addition, among the above-mentioned examples that use magnetic core powder, the content of the magnetic core powder in the synthetic resin, rubber, or paint can be, for example, 1 to 6 g/cm<3>. In addition, the particle size of the magnetic core powder is, for example, 0.1 to -5
It can be selected from a range of 0 μm.

Next, the "magnetic adsorptive means" of the one-way valve only needs to be provided at least at the part in contact with the valve seat part,
This includes not only the case where it is provided on the entire abutting part but also the case where it is provided on a part of the abutting part. 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. This "magnetically attractive means" is formed of a material that magnetically attracts the electromagnetic means, and includes the following (a) to (a).
) can be exemplified.

(a) The entire one-way valve is made of metals such as iron, cobalt, nickel, and rare earths, and alloys such as silicon steel, permalloy, and amorphous alloys that may or may not contain these metals.
Similarly, it is formed from a magnetically attractive material made of a metal oxide such as soft phunirite, or (2) also an intermetallic compound.

(b) The entire one-way valve is molded from a synthetic resin or rubber containing magnetically attractive powder made of the metal, alloy, metal oxide, or intermetallic compound.

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

(d) When molding the Funway valve from synthetic resin or rubber, a magnetically attractive member made of the metal, alloy, metal oxide, or intermetallic compound is inserted into the abutting part.

(e) Magnetically attractive material made of synthetic resin or rubber containing magnetically attractive particles made of the metal, alloy, metal oxide, or intermetallic compound in the abutting part of the one-way valve made of synthetic resin, etc. A device that is attached by attaching components with adhesive or engaging them in engagement grooves formed in the corresponding contact portions.

g) A magnetically attractive member made of the metal, alloy, metal oxide, or intermetallic compound is bonded with an adhesive or formed on the contact part of a one-way valve made of synthetic resin, etc. Something that is attached by engaging with a matching groove.

(g) A one-way valve made of synthetic resin or the like, with a magnetic adsorption film made of the metal, alloy, metal oxide, or intermetallic compound formed on the abutting part. The method for forming this magnetic adsorption film includes: (1) the above metals, alloys,
A method of applying a paint containing magnetically attractive powder particles made of metal oxides or intermetallic compounds;
Examples include methods of plating, thermal spraying, physical vapor deposition, or chemical vapor deposition of a magnetically attractive material made of a metal oxide or an intermetallic compound.

In addition, among the above-mentioned examples, in those using magnetically attractive powder, the content of the magnetically attractive powder in the synthetic resin, rubber, or paint is, for example, 1 to 6 g/Cll13.
It can be done. Further, the particle size of the magnetically attractive powder can be selected from a range of, for example, 0.1 to 50 μm.

Examples (A) to (G) of the "electromagnetic means" and examples (a) to (g) of the "magnetic attraction means" can be combined in any manner.

Further, the coil of the electromagnetic means is connected to various known power sources (
For example, batches 1) and 8) shown in FIGS. 6 and 7 can be connected, and the following cases (1) and (2) are possible regarding how current is passed through the coils.

(1) simply connecting a power source to the coil of the electromagnetic means;
When a constant current is always passed through the coil.

In this case, it is preferable that the magnetic attraction force of the magnetic attraction means to the excited electromagnetic means be set within the range of 2 to 10 g/ca. 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.

(2) A control circuit for starting or increasing the current flowing through the coil of the electromagnetic means when the inside air is not being discharged to the outside, and stopping or decreasing the current flowing through the coil when the inside air is being exhausted to the outside, is installed in the coil. When connecting to.

In this case, when the current flowing through the coil is started or increased, the magnetic attraction force of the magnetically attractive means to the excited electromagnetic means may be set to be equal to or higher than that in the case (1) above. preferable.

This is because there is no need to open the inside air outlet except when exhausting inside air to the outside, and it is only necessary to improve the sealing performance of the inside air outlet.

As this control circuit, the following (■) can be exemplified.

■ As shown in FIG. 6, a control circuit 7 using a manually operated switch 71 is used, for example, as an outside air intake/inside air circulation changeover switch (not shown) in an automobile ventilation system.
It can be linked with. Further, in order to reduce the current flowing through the manual operation switch 71, an output circuit 72 using a relay, a transistor, etc. may be provided between the manual operation switch 71 and the coil 32.

■ As shown in Figure 7, there is a sensor 73 that detects dirt components such as dust, dirt, smoke, and odor in the outside air, and when the sensor 73 detects the dirt components, it discharges the inside air to the outside. If the sensor 73 does not detect all the dirt components, it determines that it is time to exhaust the indoor air to the outside and stops or increases the current flowing through the coil 32. Control circuit 7 including a judgment and output circuit 74 for reducing the amount of power The judgment and output circuit 74 can be, for example, a relay control circuit, an electronic control circuit, a microcomputer control circuit, or the like.

[Function] 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 inside air is exhausted to the outside. At this time, if a current is passed through the coil of the electromagnetic means provided on the valve seat portion of the mouth frame body, the magnetically attractive means provided on the contact portion of the one-way valve magnetically attracts the excited electromagnetic means. (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 maintains a high sealing performance against the valve seat. Close contact while doing so. 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 discharging indoor air to the outside, follow the steps (1) and (2) below.
In each case, the Funway valve moves away from the valve seat and swings toward the outdoor side, opening the inside air outlet only in the direction of exhausting the inside air to the outside. Therefore,
Inside air contaminated with cigarette smoke and human exhalation can be discharged to the outside from the inside air outlet.

(1) When a constant current is always passed through the coil of the electromagnet means, for example, due to the negative pressure generated on the surface of the car body when the car is running, the difference in air pressure between indoors and outdoors may cause the magnetic attraction means to act on the electromagnetic means. This is when it becomes large enough to overcome the magnetic attraction force and the one-way valve's own weight.

(2) When the control circuit stops or reduces the current flowing through the coil of the electromagnetic means, the difference in air pressure between indoors and outdoors is caused by the one-way valve's own weight (if the current is not zero, a slight Magnetic attraction force is added.

) when it becomes large enough to overcome. Therefore, even if the pressure difference is smaller than in case (1) above, the one-way valve swings sensitively to open the inside air outlet, so that the inside air can be efficiently exhausted to the outside.

Here, in the case where the control circuit uses the manual operation switch of example (2) above, the judgment of whether or not it is time to discharge the indoor air to the outside and the operation of the manual operation switch are performed by a human being. will be carried out.

In addition, when the control circuit uses a sensor such as the example ① above, the judgment as to whether it is time to exhaust the inside air to the outside is based on the detection of dirt components in the outside air by the sensor. Therefore, the judgment and output circuit will perform this automatically.

[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 is provided with an electromagnetic member 3 as an electromagnetic means, and the one-way valve 4 is provided with a magnetically attractive powder 5 as a magnetically attractive 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 diagonally downward from the inside air inlet 11 that is open at the upper end, and is further bent to extend horizontally. An extending duct main body 12 and a 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 an automobile are integrally formed of polypropylene resin. It is what it is. 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 (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. 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 Funway valve 4, which will be described in detail later. Mounting protrusion 28
is formed.

As shown in FIG. 5 and the like, a rectangular frame-shaped engagement groove 29 surrounding each internal air outlet 24 is formed in the valve seat portion 2o.

An electromagnet member 3 having a square frame shape is also engaged in the engagement groove 29 and bonded with an adhesive, so that the one-way valve 4 is brought into contact with the exposed surface of the electromagnet member 3. The electromagnetic member 3 includes a rectangular frame-shaped magnetic core member 31 made of soft ferrite, and a coil 32 made of a copper wire wound around an outer peripheral groove of the magnetic core member 31.

As shown in FIG. 7, the coil 32 of the electromagnetic member 3 is equipped with a battery 8 as a power source, and a control circuit 7 that controls on/off the current flowing from the battery 8 to the coil 32.
are connected. This control circuit 87 is connected to a sensor 73 that detects dirt components such as dust, dirt, smoke, and odor in the outside air.
and an output circuit 874, which applies a current to the coil 32 when the sensor 73 senses the dirt component, and cuts off the current to the coil 32 when the sensor 73 does not detect the dirt component. As the output circuit 74, a microcomputer control circuit is used. The magnetic force of the electromagnetic member 3 when a current flows through the coil 32 to excite it is set to 30 to 2000 G (Gauss) (more preferably 200 to 600 G).

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. In other words, the opening frame body 2 is inserted into the mounting portion 1 from the outdoor side.
4, and attach the mounting protrusion 15 of the mounting portion 14 to the vertical wall 2.
2 into the mounting hole 27. Next, this mounting protrusion 15
By heating and melting the top of the mouth frame 2 to fuse or attach it to the vertical wall 22, the mouth frame 2 is attached so that it will not come off. Note that the installation of this mouth frame body 2 is
This is done after installing the next six one-way valves 4.

(One-way valve) As shown in FIGS. 1 and 2, the one-way valve 4 has a metal oxide-based magnetically attractive powder 5 (e.g., soft ferrite, particle size 0.8 to 2 μm). 20~80v
The chloroprene rubber 52 containing vol% (more preferably 40 to 60vol%) forms a rectangular shape that is one size larger than the inside air outlet 24 and has a thickness of about 0.0mm.
It is integrally molded as a thin plate of 5 mr. 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.

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 attraction force of the magnetically attractive powder 5 to the electromagnetic member 3 is set to about 7 to 20 g/aft.

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

In addition, this one-way valve 4 uses the contact force acting on the valve seat part 20 due to its own weight and the magnetic adsorption force of the magnetically attractive powder 5 against the electromagnetic member 3, except when discharging the inside air R to the outside C. As a result, the inside air outlet 24 is closed in a securely sealed state, and when the pressure difference between the indoor air B and the outdoor air C becomes large enough to overcome the weight of the one-way valve 4, the one-way valve 4 is moved away from the valve seat 20. swings outdoors,
It is configured such that the inside air outlet 24 can be opened 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 sensor 73 of the control circuit 7 detects dust, dirt, etc. in the outside air.
When no dirt components such as smoke or odor are detected, the determination and output circuit 74 determines that it is time to discharge the inside air R to the outside C, and the electromagnet member 3 provided on the valve seat portion 20 of the mouth frame body 2 A current is applied to the coil 32 to excite it. Therefore, when the one-way valve 4 closes the inside air outlet 24 of the mouth frame body 2, the contact portion 40 of the one-way valve 4
Not only does it abut against the valve seat part 20 of the mouth frame body 2 due to its own weight, but also due to the force of magnetic adsorption between the excited electromagnetic member 3 and the magnetically attractive powder 5 contained in the abutment part 40. ,
It comes into close contact with the valve seat portion 20 while maintaining high sealing performance. Therefore, even if the one-way valve 4 is thin, a gap will not be generated between the one-way valve 4 and the valve seat 20, and the one-way valve 4 will jump up due to vibrations when the car is running, and the inside air outlet 24 will be closed. It never opens. Therefore, it is possible to highly prevent dirty outside air containing dust, dirt, smoke, odor, etc. from flowing back into the room B from the inside air outlet 24.

Next, when the sensor 73 of the control circuit 7 does not detect dirt components in the outside air, the determination and output circuit 74 determines that it is not the time to discharge the inside air R to the outside C, and the coil 32 of the electromagnetic member 3 Demagnetize by cutting off the current flowing through the magnet.

In this state, when the pressure difference between indoor B and outdoor C becomes large enough to overcome the weight of the one-way valve 4 due to, for example, negative pressure generated on the surface of the car body when the car is running, the one-way valve 4 It moves away from the seat 20 and swings toward the outdoor side (in the direction of arrow S2 in FIG. 5), and the indoor air R
The inside air exhaust port 24 is opened only in the direction of exhausting the air to the outside C. Therefore, internal air R contaminated by cigarette smoke and human breath
can be efficiently discharged from the inside air outlet 24 to the outside C.

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 modified and embodied as desired 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,
It has the following excellent effects:

First, according to the ventilation system according to claim 1, the inside air outlet can be closed in a securely sealed state with a one-way valve except when inside air is exhausted to the outside, and dirty outside air can be exhausted from the inside air. This can prevent backflow from the outlet into the room.

Furthermore, according to the ventilation device according to claim 2, the sensor can automatically determine whether or not it is time to exhaust the inside air to the outside, and when the inside air is not exhausted to the outside, the By further improving the sealing performance of the inside air outlet, it is possible to prevent the backflow of the outside air to a high level, and when exhausting inside air to the outside, the one-way valve can be easily swung even with a small pressure difference, making the inside air more efficient. can be discharged.

[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 line I in FIG. 3, and FIG. 5 is an enlarged sectional view along the ■-■ line in FIG. FIG. 3 is a block diagram showing an example of a control circuit of the means. 1... Inside air introduction duct, 2... Mouth frame body, 3...
An electromagnetic member as an electromagnetic means, 4... One-way valve, 5... Magnetically attractive granular material as a magnetically attractive means, 7
... Control circuit, 20... Valve seat portion, 24... Internal air outlet, 25... Peripheral portion, 31... Magnetic core member, 32...
... Coil, 40 ... Contact part, 71 ... Manual operation switch, 72 ... Output circuit, 73 ... Sensor 74
...Judgment and output circuit, B...Indoor, C...Outdoor, R...Inside.

Claims (2)

[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 ventilating device comprising an electromagnetic means on a seat, and the one-way valve having magnetically attractive means magnetically attracted to the electromagnetic means at least in a contact portion with the valve seat. 2. a sensor that detects dirt components such as dust, dirt, smoke, and odor in the outside air; A determination and output circuit that starts or increases the current flowing through the coil, and when the sensor does not detect a dirt component, determines that it is time to discharge indoor air to the outside, and stops or reduces the current flowing through the coil. 2. A ventilator according to claim 1, wherein a control circuit provided is connected to said electromagnetic means.