JPH04158155A - Ventilator - Google Patents

Abstract

PURPOSE:To prevent dirty air from counterflowing from an inner air exhaustion port into a room except when the inner air is exhausted outdoors by providing an opening device in which a one-way valve is driven compulsorily based on fluid pressure or electromagnetic force to close the inner air exhaustion port of a port frame. CONSTITUTION:Except when inner air (R) is exhausted to the outdoor (C), an air cylinder 3 drives a one-way valve 4 compulsorily to a port frame side, whereby the one-way valve 4 comes into contact with a valve seat 20 to close an inner air exhaustion port 24. Even if vibration of a running automobile is transmitted, for example, there is no possibility that the one-way valve 4 jumps up to open the inner air exhaustion port 24, and thus dirty outer air containing sand and dirt, dust, smoke, odor and the like is prevented from counterflowing into a room (B) through the opened port 24. In order to exhaust the inner air (R) to the outdoor (C), the air cylinder 3 drives the one-way valve 4 compulsorily to the outdoor side, so that the valve 4 comes apart from the valve seat 20 of the port frame 2 to open the inner air exhaustion port 24.

Description

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

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

This one-way valve is formed into a plate shape that is one size larger than the inside air outlet, and is disposed on the outdoor side surface of the mouth frame body, and for example, the upper end of the one-way valve is attached directly above the inside air outlet. As a result, substantially the entire portion excluding the upper end portion is provided to be swingable around the mounting portion. This one-way valve uses its own weight to 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 collapse under 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.

[Problems to be Solved by the Invention] This ventilation device is used by being attached to a car, for example, but since the air inside the relatively small interior of a car is easily contaminated by cigarette smoke, human breath, etc. The ability to quickly discharge outdoors is required.

However, as mentioned above, the one-way valve swings toward the outdoor side and opens the indoor air outlet only by the pressure difference, so when the pressure difference is small compared to the weight of the one-way valve, the indoor air outlet cannot be opened. There was a problem in that the dirty internal air could not be exhausted.

Therefore, in the past, by reducing the weight of the one-way valve by, for example, reducing the thickness of the one-way valve, the inside air outlet can be opened even when the pressure difference is small.

However, if the weight of the one-way valve is reduced, the contact force of the one-way valve against the valve seat when closing the internal air outlet becomes weaker, and the edges of the one-way valve become more easily deformed. There is a drawback that a gap is generated between the seat and the seat, which deteriorates the sealing performance of the inside 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 an area where dust tends to fly up, and the user of the car is asking for a ventilation system that can keep the inside air outlet closed in a securely sealed state. There were many requests for it.

The first object of the present invention is to reliably keep the inside air outlet closed even when vibrations are transmitted, except when inside air is being exhausted outdoors, and to prevent dirty outside air from flowing back into the room from the inside air outlet. The objective is to provide a ventilation system that can prevent this. Furthermore, the second object of the present invention is that when discharging indoor air to the outside, even if the one-way valve has a large weight,
Another object of the present invention is to provide a ventilation device that can reliably open an inside air outlet and exhaust dirty inside air from the inside air outlet to the outdoors even if the pressure difference between indoors and outdoors is small.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a mouth frame body having an inside air outlet for discharging inside air to the outside, and a valve that is not used when inside air is exhausted outside. In a ventilation device comprising a one-way valve that contacts a peripheral edge of the inside air exhaust port as a seat to close the inside air exhaust port, and opens the inside air exhaust port only in the exhaust direction when exhausting inside air to the outside, The following configuration (1), (2) or (3) was adopted.

(1) A configuration including a closing device that forcibly drives the one-way valve based on fluid pressure or electromagnetic force to close the internal air outlet of the mouth frame body.

(2) A configuration including an opening device that forcibly drives the one-way valve based on fluid pressure or electromagnetic force to open the internal air outlet of the mouth frame body.

(3) A configuration including an opening/closing device that opens and closes the internal air outlet of the mouth frame body by forcibly driving the one-way valve based on fluid pressure or electromagnetic force.

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 discharging the indoor air to the outside, the indoor air outlet is opened only in the direction in which the indoor air is discharged to the outside. Therefore, firstly, this one-way valve is formed to be slightly larger than the inside air outlet so that it can come into contact with the valve seat of the mouth frame. Second, this one-way valve is disposed on the outdoor side surface of the mouth frame body, and for example, (1) the upper end of the one-way valve is installed directly above the inside air outlet, so that almost the entire area excluding the upper end is The one-way valve is provided so as to be able to swing around the mounting part, or (1) the entire one-way valve is supported by the closing device, opening device, or opening/closing device, and the entire one-way valve can be separated from and abutted on the mouth frame body while remaining parallel to the mouth frame body. It is set up like this.

This one-way valve only needs to have enough rigidity to withstand driving by the closing device, opening device, or opening/closing device, and examples of the material of the one-way valve include metal, synthetic resin, rubber, and composite materials thereof. be able to.

In particular, from the viewpoint of adhesion to the valve seat and prevention of abnormal noise,
It is preferable to use a rubber or rubber-like synthetic resin molded with a metal plate inserted inside it, or a metal plate with rubber or a rubber-like synthetic resin pasted on the side of the mouth frame body. In addition, the rocking structure of the one-way valve is as follows (
1) (2) can be exemplified.

(1) A structure in which the one-way valve, including the part that is the center of its swing, is integrally formed of rubber or rubber-like synthetic resin, and swings using the visibility of the elasticity. 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 "closing device", "opening device" or "opening/closing device" of the one-way valve includes the following (A) to (C).
can be exemplified.

(A) Fluid pressure cylinders such as air cylinders and hydraulic cylinders that generate linear motion based on fluid pressure.

(8) An electromagnetic solenoid that generates linear motion based on electromagnetic force.

(C) A combination of an electric motor that generates rotational motion based on electromagnetic force and a linkage mechanism that converts the rotational motion into linear motion.

The following (1) and (2) can be exemplified as control circuits for the door closing device, opening device, or opening/closing device.

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

(2) A sensor that detects dirt components such as dust, dirt, smoke, and odor in the outside air, and a closing device or A control circuit comprising a determination and output circuit that operates an opening/closing device, and when the sensor does not detect a dirt component, determines that it is time to discharge indoor air to the outside and operates the opening device or the opening/closing device. For this judgment and output circuit, for example, a relay control circuit, an electronic control circuit, a microcomputer control circuit, etc. can be used.

[Function] According to the ventilation device according to claim 1, since the mouth closing device forcibly drives the one-way valve toward the mouth frame body except when internal air is exhausted to the outside, the one-way valve closes to the mouth frame body. It contacts the valve seat of the body and closes the internal air outlet.

Therefore, even if vibrations are transmitted when the car is running, the one-way valve will not jump up and open the inside air outlet, and dirty outside air containing dust, dirt, smoke, odors, etc. will be aired through the inside air outlet. This can prevent water from flowing back into the room.

According to the ventilation device according to claim 2, when internal air is discharged outdoors, the opening device forcibly drives the one-way valve toward the outdoor side, so that the one-way valve is separated from the valve seat of the mouth frame body. to open the inside air outlet. Therefore, even when the pressure difference between the interior and exterior of the car is small compared to the weight of the one-way valve, the inside air outlet can be opened, and the inside air contaminated with cigarette smoke and human breath can be removed from the inside air outlet. can be reliably discharged from the room.

According to the ventilation device according to claim 3, the ventilation device according to claim 1 or 2
It has the same effect as the ventilation device described.

[First Embodiment] A first embodiment in which the present invention is embodied in an automobile exhaust system will be described with reference to FIGS. 1 to 3.

This ventilation system has a duct 1 for introducing inside air that takes in inside air R from the interior B of a car and introduces it to the next inside air outlet.
a mouth frame body 2 having an inside air outlet for discharging the inside air R to the outdoors C and a peripheral portion thereof; and a mouth frame body 2 configured to open the inside air outlet only when discharging the inside air R to the outdoors C. a one-way valve 4 attached to the one-way valve 4;
It is comprised of an air cylinder 3 as an opening/closing device that forcibly drives the inside air outlet to open and close the inside air outlet, and a member or structure for attaching these members to each other. Details of these components are as follows.

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

(Gout Frame Body) The mouth frame body 2 includes an inclined wall 21 having an inclination angle of about 60 degrees, a horizontal wall 23 connected to the lower end of the inclined wall 21, and the upper end of the inclined wall 21 and the horizontal wall. Two rows of vertical walls 22, upper and lower, connected to the inner end of the wall 23 are integrally molded from polypropylene resin. This inclined wall 21 is composed of a rectangular inside air outlet 24 and its peripheral edge 25,
Most of the peripheral portion 25 constitutes the valve seat portion 20 against which the one-way valve 4 comes into contact. The rain vertical wall 22 is formed with a plurality of mounting holes 27 for insertion into the mounting protrusions 15 of the mounting portion 14 of the inside air introduction duct 1, and the upper row of vertical walls 22 is for mounting the one-way valve 4. A plurality of mounting protrusions 28 are formed.

The mouth frame body 2 configured as described above is constructed by inserting the mounting projection 15 of the mounting portion 14 of the inside air introduction duct 1 into the mounting hole 27 of the vertical wall 22, and heating and melting the top of the mounting projection 15. It is attached to the inside air introduction tact 1. Note that the mouth frame body 2 is attached after the next one-way valve 4 is attached to the mouth frame body 2.

(One-way valve) The one-way valve 4 is formed into a rectangular plate shape by inserting a stainless steel plate one size larger than the inside air outlet 24 inside chloroprene rubber, and is driven by the air cylinder 3. It has enough rigidity to withstand it. 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 configured as described above has the mounting protrusion 28 of the vertical wall 22 inserted into the mounting hole 41 at the upper end thereof, and the mounting projection 28 of the retainer 6 formed into an elongated plate shape made of polypropylene resin. By inserting the mounting projection 28 of the vertical wall 22 and heating and melting the top of the mounting projection 28, it is attached to the outdoor side surface of the mouth frame 2 so as to close the inside air outlet 24.

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.

(Air Cylinder) The air cylinder 3 is a spring-return type single-acting or double-acting type consisting of a cylinder tube 31 and a piston rod 32 that enters and exits the cylinder tube 31. Since the one-way valve 4 can be driven with a small force, a small and lightweight air cylinder 3 is used. The base end of the cylinder tube 31 is rotatably pivoted to a coupling member 16 provided on the inner bottom surface of the duct body 12.

Further, the tip of the piston rod 32 is rotatably pivoted to a coupling member 43 provided on the back surface of the one-way valve 4.

Then, by a control circuit (not shown) using the sensor, etc., the piston rod 32 is retracted to move the one-way valve 4 toward the mouth frame side, as shown in FIG. 1, except when the inside air R is discharged to the outside C. When the inside air R is discharged to the outside C, the piston rod 32 is extended to drive the one-way valve 4 toward the outside, as shown in FIG.

(Operations and Effects) According to the ventilation system of the first embodiment configured as described above, the air cylinder 3 is operated in a one-way manner as shown in FIG. In order to forcibly drive the valve 4 toward the mouth frame body, the one-way valve 4
contacts the valve seat portion 20 of the mouth frame body 2 to close the inside air outlet 24. Therefore, even if vibrations are transmitted when the car is running, for example, the one-way valve 4 will not jump up and open the inside air outlet 24, and the dirty outside air containing dust, dirt, smoke, odors, etc. will be brought into the inside air. It is possible to prevent the air from flowing back into the room B from the outlet 24.

Next, when the inside air R is discharged to the outside C, the air cylinder 3 forcibly drives the one-way valve 4 toward the outside of the room, as shown in FIG. The valve seat portion 2o is separated and the inside air outlet 24 is opened. Therefore, even when the pressure difference between the interior B and the exterior C is small when the car is running, for example, compared to the weight of the one-way valve 4, the interior air outlet 24 can be opened, allowing the interior air contaminated with cigarette smoke and human exhalation to be released. R can be reliably discharged to the outside through the inside air exhaust port 24.

[Second Embodiment] The ventilation system of the second embodiment shown in FIGS. 4 to 6 is provided with an electric motor 51 and a link mechanism 52 as the opening/closing device in place of the air cylinder 3 as the opening/closing device. This embodiment differs from the first embodiment only in the following points.

The electric motor 51 is attached to the inner surface of the duct body 12. The link mechanism 52 includes a crank 53 attached to the rotating shaft of the electric motor 51 and a slit 5 attached to the back of the one-way valve 4.
5, and a connecting joint 56 whose left end is pivoted to the tip of the crank 53 and whose right end is fitted into the slit 55 in FIG.

A control circuit (not shown) using the sensor etc. causes the electric motor 51 to rotate so that the crank 53 is on the indoor side, as shown in FIG. 4, except when the inside air R is discharged to the outside C. The right end of the connecting node 56 is the slit 55.
The one-way valve 4 is fitted into the indoor end of the valve 4, and the one-way valve 4 is forcibly driven toward the mouth frame body. Furthermore, when discharging the inside air R to the outside C, the electric motor 51 rotates so that the crank 53 comes to the mouth frame side, and the right end of the connecting joint 56 comes to the one-way valve side end as shown in FIG. Once fitted, the one-way valve 4 is placed on standby so as to be able to swing to the outside of the room due to the pressure difference.

According to the ventilation system of the second embodiment configured in this way,
When the inside air R is not being discharged to the outside C, the electric motor 51 and the link mechanism 52 forcefully drive the one-way valve 4 toward the mouth frame as shown in FIG. The internal air outlet 24 is closed by contacting the valve seat 20 of the mouth frame body 2. Therefore, it is possible to prevent dirty outside air from flowing back into the room B from the inside air outlet 24.

Next, when discharging the inside air R to the outside C, as shown in FIG. When the pressure difference between the indoor air B and the outdoor air C becomes large while the car is running, the one-way valve 4 swings toward the outdoor side, as shown in FIG.

The inside air is exhausted from the inside air outlet 24 to the outside.

[Third Embodiment] A ventilation system according to a third embodiment shown in FIGS. 7 to 9 includes an electric motor 71 and a link mechanism as an opening device in place of the electric motor 51 and link mechanism 52 as the opening device. This embodiment differs from the second embodiment only in that 72 is provided.

The electric motor 71 is attached to the inner surface of the duct body 12. The link mechanism 72 includes a crank 73 attached to the rotating shaft of the electric motor 71 and a slit 7 attached to the back of the one-way valve 4.
5 and a connecting joint 76 whose left end is pivoted to the tip of the crank 73 and whose right end is fitted into the slit 75 in FIG.

A control circuit (not shown) using the sensor etc. normally rotates the electric motor 71 so that the crank 73 is on the indoor side, as shown in FIG.
The right end of the valve 6 fits into the mouth frame side end of the slit 75, so that the one-way valve 4 is placed on standby so as to be able to swing toward the outdoor side due to the pressure difference. Also, when you want to reliably discharge the inside air R to the outside C, use the crank 7 as shown in Fig. 9.
The electric motor 71 rotates so that 3 is on the mouth frame side,
The right end of the connecting joint 76 fitted into the one-way valve side end of the slit 75 forcibly drives the one-way valve 4 toward the outdoor side.

According to the ventilation device of the third embodiment configured in this way,
Normally, as shown in FIG. 7, the electric motor 71 and the link machine 172 keep the one-way valve 4 on standby in a swingable manner, so that the weight of the one-way valve 4 is reduced between indoor B and outdoor C when the vehicle is running. When the pressure difference between the indoor air and the indoor air becomes large, the one-way valve 4 swings toward the outdoor side as shown in FIG. 8, and the dirty indoor air R is discharged outdoors through the indoor air outlet 24.

Next, when you want to reliably discharge the inside air R to the outside C, use the 9th
As shown in the figure, the electric motor 71 and the link mechanism 7
2 forcibly drives the one-way valve 4 toward the outdoor side.

Therefore, for example, even when the pressure difference between the indoor air B and the outdoor air C when the car is running is small relative to the weight of the one-way valve 4, the inside air exhaust port 24 can be opened, and the dirty inside air R can be discharged from the inside air exhaust port 24 to the outside. can be reliably discharged.

Moreover, since the one-way valve 4 can be swung further from the state shown in FIG. 9, high ventilation performance can be obtained.

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.

According to the ventilation device according to claim 1, even when vibrations are transmitted, the inside air outlet is reliably closed and the dirty outside air is prevented from flowing back into the room from the inside air outlet, except when inside air is exhausted outside. It is possible to prevent this from happening.

According to the ventilation device according to claim 2, when discharging the indoor air to the outdoors, the indoor air exhaust port can be reliably opened even if the one-way valve has a large weight or the pressure difference between indoors and outdoors is small. , Dirty indoor air can be discharged outdoors from the indoor air outlet.

According to the ventilation device according to claim 3, the ventilation device according to claim 1 or 2
The effects of the ventilation device described can also be obtained.

[Brief explanation of the drawing]

Figures 1 to 3 show a first embodiment of a ventilation system embodying the present invention, with Figure 1 being a cross-sectional view with the inside air outlet closed, and Figure 2 showing the inside air outlet being open. FIG. 3 is an exploded perspective view of the entire ventilation system. Figures 4 to 6 show a second embodiment of the ventilation system, with Figure 4 being a sectional view with the inside air outlet closed, and Figure 5 being the closed state with the inside air outlet openable. Cross-sectional view, No. 6
The figure is a cross-sectional view of the inside air outlet in a state where it is opened due to a pressure difference. Figures 7 to 9 show a third embodiment of the ventilation system, Figure 7 is a sectional view of the inside air outlet in a closed state with the opening possible, and Figure 8 is a cross-sectional view of the inside air outlet in a closed state with the opening possible. FIG. 9 is a cross-sectional view of the inside air outlet opened by the opening device. 1... Inside air introduction duct, 2... Mouth frame body, 311.
Air cylinder as an opening/closing device, 4... One-way valve, 20... Valve seat portion, 24... Internal air outlet, 2
5... Peripheral portion, 51... Electric motor as a closing device, 52... Also a link mechanism, 71... Electric motor as an opening device, 72... Also a link mechanism, B... Indoor , C...Outdoor, R...Introverted. Patent applicant Toyoda Gosei Co., Ltd.

Claims (1)

[Claims] 1. 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, and the indoor air outlet serving as a valve seat except when discharging indoor air to the outdoors. A ventilation device comprising: a one-way valve that contacts a peripheral edge to close the inside air outlet; and, when exhausting indoor air to the outside, opens the inside air outlet only in the exhaust direction away from the valve seat; A ventilation device comprising a closing device that forcibly drives the one-way valve based on fluid pressure or electromagnetic force to close the internal air outlet of the mouth frame. 2. A mouth frame body having an inside air outlet for discharging indoor air to the outdoors, and a mouth frame body that abuts the peripheral edge of the indoor air outlet as a valve seat except when discharging indoor air to the outdoors. A one-way valve that closes the inside air 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. Alternatively, a ventilation device comprising an opening device that is forcibly driven based on electromagnetic force to open the inside air outlet of the mouth frame body. 3. A mouth frame body having an inside air outlet for discharging indoor air to the outdoors, and a mouth frame body that abuts the peripheral edge of the indoor air outlet as a valve seat except when discharging indoor air to the outdoors. A one-way valve that closes the inside air 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. Alternatively, a ventilation device comprising an opening/closing device that is forcibly driven based on electromagnetic force to open and close the inside air outlet of the mouth frame body.