JPH04350446A - Ventilator - Google Patents

Abstract

PURPOSE:To prevent outside fowl air from flowing upstream into a room through an outlet for inside air without increasing the weight and cost of the apparatus by using good seal for a one-way valve outlet for inside air. CONSTITUTION:In a ventilator, an opening-framing material 2 or the material of a one-way valve 4 is formed in two layers, one layer being an opposing layer 2a, 4a and the other being a not-opposing layer 2b, 4b. The opposing layer 2a, 4a is formed of a synthetic resin 32 or rubber 34 which in either case contains magnetically attracting particulates 31 or particulates of permanent magnet 33, whereas the not-opposing layer 2b, 4b is formed of a synthetic resin 32 or rubber 34 which in either case is free of magnetically attracting particulates or particulates of permanent magnet or contains such magnetic particulates only in a slight amount. The opening-framing material 2 or the one-way valve 4 can be formed in three layers with an intermediate layer 2c between an opposing layer 2a and a not-opposing layer 2b.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a ventilation system for ventilating the interior of an automobile, building, etc., and more specifically, an inside air exhaust system for exhausting dirty indoor air (hereinafter referred to as inside air) to the outside. This is related to the improvement of.

0002

[Prior Art] Conventional ventilation systems include, for example,
As disclosed in Japanese Patent Application Laid-open No. 9130 and Japanese Patent Application Laid-Open No. 59-63221, a mouth frame body having an inside air exhaust port for discharging inside air to the outside, and a peripheral portion of the inside air exhaust port of the mouth frame body are provided. It is equipped with a one-way valve that opens and closes the inside air outlet by coming into contact with it due to its own weight. However, this ventilation device has the disadvantage that a gap is generated between the one-way valve and the mouth frame, resulting in a reduction in the sealing performance of the inside air outlet. In particular, in ventilation systems for automobiles, the one-way valve may jump due to vibrations when the automobile is running, causing the inside air outlet to open wide. If the sealing performance of the inside air outlet deteriorates in this way, dirty outdoor air containing dust, dirt, smoke, odors, etc. (hereinafter referred to as outside air) will flow back into the room from the inside air outlet and be harmful to people. Sometimes it gave me a sense of pleasure.

0003

[Problems to be Solved by the Invention] Therefore, the present inventors have previously completed several inventions related to the technology of bringing the mouth frame body and the one-way valve into close contact with each other by magnetic adsorption force, and have already filed applications (for example, (Patent Application No. 2-54240). These inventions include embodiments in which the mouth frame body or the one-way valve is made of synthetic resin or rubber containing magnetically attractive powder or permanent magnet powder. According to these inventions, the sealing performance of the inside air outlet by the one-way valve is improved, so that the above-mentioned conventional problems can be solved.

However, magnetically attractive powder or permanent magnet powder has a large specific gravity and is expensive, so as in the above embodiment, the entire mouth frame or one-way valve is made of magnetically attractive powder or permanent magnet powder. If it is made of synthetic resin or rubber containing permanent magnet powder, there is a problem in that the weight of the entire ventilation device increases and the cost also increases.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems, suppress an increase in the weight and cost of the ventilation system, and improve the sealing performance of the inside air outlet using a one-way valve, thereby preventing dirty outside air from the inside air outlet. An object of the present invention is to provide a novel ventilation system capable of preventing backflow into a room.

[0006]

Means for Solving the Problems In order to achieve the above object, the ventilation device according to claim 1 of the present invention includes a mouth frame body having an inside air outlet, and a periphery of the inside air outlet of the mouth frame body. In a ventilation device equipped with a one-way valve that opens and closes an inside air outlet by contacting the mouth frame body, the mouth frame body or the one-way valve has a two-layer structure of a layer facing the one-way valve or the mouth frame body and a non-facing layer; The opposing layer is formed of a synthetic resin or rubber containing magnetically attractive powder or granular material or permanent magnet powder, and the non-opposing layer is formed of a synthetic resin or rubber that does not contain or contains only a small amount of magnetically attractive powder or granular material. It is characterized by being made of resin or rubber.

[0007] Furthermore, the ventilation device according to claim 2 is a ventilation device similarly equipped with a mouth frame body and a one-way valve, in which the mouth frame body or the one-way valve is arranged in a layer facing the one-way valve or the mouth frame body and a layer not facing the mouth frame body. and an intermediate layer thereof, the facing layer and the non-facing layer are formed of synthetic resin or rubber containing magnetically attractive powder or permanent magnet powder, and the intermediate layer is formed of magnetically attractive powder or rubber. It is characterized by being formed from a synthetic resin or rubber that does not contain or contains only a small amount of granules or permanent magnet powder.

[0008] In these ventilation devices, the "mouth frame body" is equipped with at least an inside air outlet and its periphery; It may be something that has been done. (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 described in (1) above is formed and added as a separate part from the mouth frame body. (3) A room air introduction duct for taking in room air and introducing it to the room air outlet, or a room air release duct for releasing the room air discharged from the room 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 as a separate part from the mouth frame body.

[0009] Furthermore, the shape of the inside air outlet of this mouth frame body is as follows:
It can be set as appropriate, such as a square, a triangle, or a circle, as needed. Similarly, the number of internal air exhaust ports and the opening area are also
It can be set appropriately as necessary.

[0010] Next, the "one-way valve" closes the inside air exhaust port by contacting the peripheral edge of the inside air exhaust port of the mouth frame body except when exhausting inside air to the outside. When the pressure difference between the valve and the opening frame becomes large enough to overcome the magnetic adsorption force with the mouth frame body and the weight of the one-way valve, the internal air outlet opens only in the direction to exhaust internal air to the outside. It is something that 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 peripheral edge of the mouth frame. Secondly,
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 installed directly above the inside air outlet, so that almost the entire valve excluding the upper end is centered around the mounting part. It is provided so that it can be swung as it is. 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.

[0011]Next, as the "magnetic adsorption powder and granules",
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 (2) Similarly, granules made of intermetallic compounds can be exemplified.

Examples of the "permanent magnet powder" include: ■ Alloys such as alnico, iron-chromium-cobalt, manganese-aluminum-carbon, etc., and ■ Hard ferrite (hard magnetic ferrite such as barium ferrite and strontium ferrite).
Examples include metal oxides such as (2) or intermetallic compounds such as rare earth cobalt.

Examples of "synthetic resin" include polyethylene, polypropylene, polystyrene, ABS, vinyl chloride, polyethylene, ethylene vinyl acetate, thermoplastic elastomer, etc., and examples of "rubber" include chloroprene rubber, natural rubber, Examples include styrene butadiene rubber and ethylene propylene rubber.

[0014] The particle diameter of the magnetically attractive powder or the permanent magnet powder can be appropriately selected from the range of, for example, 0.1 to 100 μm. Further, the content of magnetically attractive powder or permanent magnet powder in the synthetic resin or rubber is, for example, 1 to 6 g/cm3, in other words, 20 to 80% by volume.
(more preferably 40 to 60% by volume).

[0015] Next, examples of methods for forming the mouth frame body or one-way valve into a two-layer structure of a facing layer and a non-facing layer include two-color molding, insert molding, and pasting. Furthermore, examples of methods for forming the mouth frame body or one-way valve into a three-layer structure of a facing layer, a non-facing layer, and an intermediate layer include sandwich molding, insert molding, and pasting.

[0016] The magnetic adsorption force between the mouth frame and the one-way valve is preferably in the range of 0.2 to 10 g/cm2. This is because if the magnetic attraction force is stronger than 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 the car is running. This is because, for example, the one-way valve swings due to vibrations generated when the car is running, opening the inside air outlet.

[0017]

[Operation] According to the ventilation device according to claim 1 or 2 of the present invention, at least the facing layer of the mouth frame body or the one-way valve is made of synthetic resin or rubber containing magnetically attractive powder or permanent magnet powder. As a result, the magnetic adsorption force between the mouth frame and the one-way valve is ensured, and a gap does not occur between the one-way valve and the mouth frame, and the one-way valve does not jump up due to external vibrations. Therefore, the sealing performance of the inside air outlet is improved, and it is possible to prevent dirty outside air from flowing back into the room from the inside air outlet. When the pressure difference between the room and the outdoors becomes large enough to overcome the magnetic adsorption force, the one-way valve separates from the mouth frame body and opens the inside air outlet, thereby discharging dirty inside air from the inside air outlet to the outside. Can be done.

[0018] Furthermore, since the non-facing layer or intermediate layer of the mouth frame body or one-way valve is formed of synthetic resin or rubber that does not contain or contains a small amount of magnetically attractive powder or permanent magnet powder, these The mouth frame body or one-way valve does not increase in weight or cost compared to the conventional one.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a ventilation system for an automobile will be described below with reference to FIGS. 1 to 5. This ventilation system consists of a duct 1 for introducing inside air that takes in inside air R from the interior of a car and introduces it to the next inside air outlet, and 6 inside air exhaust ports for discharging the inside air R to outside C. A mouth frame body 2 having a peripheral edge of
It is composed of six one-way valves 4 attached to the mouth frame body 2 so as to open the outlet only when the inside air is discharged, and a member or structure for attaching these members to each other. Details of these components are as follows.

As shown in FIGS. 2 and 4, the inside air introduction duct 1 extends obliquely downward from an inside air inlet 11 that is open at the upper end, and is further bent to extend laterally.
2 and a rectangular frame-shaped flange base 13 provided at the base end of the duct body 12 for attaching the entire ventilation system to the vehicle body A of the automobile, are integrally formed of polypropylene resin. be. 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.

As shown in FIGS. 2 and 4, the mouth frame body 2 is
Two rows of upper and lower sloped walls 21 having an inclination angle of about 60 degrees, and two rows of vertical walls 22 connected to the upper end of each sloped wall 21.
and a horizontal wall 23 connecting the upper inclined wall 21 and the lower vertical wall 22. 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. A valve support frame 26 extends radially from the center part to the peripheral part 25 at intervals of about 60 degrees.
is formed integrally with the peripheral edge portion 25. Most of this peripheral portion 25 is the valve seat portion 2 that the one-way valve 4 comes into contact with.
It constitutes 0. 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 FIGS. 1 and 5, the mouth frame body 2 has a three-layer structure including a facing layer 2a, a non-facing layer 2b, and an intermediate layer 2c between the facing layer 2a and the one-way valve 4. The non-facing layer 2b contains 30 magnetically attractive powder particles 31 made of soft ferrite and having a particle size of 20 to 80 μm.
A soft polypropylene resin 32 containing ~60% by weight is used, and a hard polypropylene resin 32 that does not contain this magnetically attractive powder is used for the intermediate layer 2c, and is molded by a known sandwich molding method. . As a result, the average specific gravity of the mouth frame 2 was 1.14 to 1.30, and the specific gravity when the entire mouth frame was molded from a polypropylene resin containing magnetically attractive powder was 1.24 to 1. 48
It is approximately 10% lighter than the previous model.

The mouth frame body 2 constructed as described above is attached to the attachment portion 14 of the inside air introduction duct 1 in the following manner. That is, first, the mouth frame body 2 is attached to the mounting part 14 from the outdoor side, and the mounting protrusion 15 of the mounting part 14 is attached.
is inserted into the mounting hole 27 of the vertical wall 22. 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. In addition, the installation of this mouth frame body 2 is as follows.
This is done after the next six one-way valves 4 are attached to the mouth frame body 2.

As shown in FIGS. 1, 2, etc., the one-way valve 4 is a thin plate-shaped member having a rectangular shape slightly larger than the inside air outlet 24 and having a thickness of about 0.5 to 2.0 mm. This one-way valve 4 has a two-layer structure of a facing layer 4a and a non-facing layer 4b with respect to the mouth frame body 2, and the facing layer 4a
A soft chloroprene rubber 34 containing 10 to 60% by volume of permanent magnet powder 33 made of hard ferrite and having a particle diameter of 20 to 80 μm is used, and the non-facing layer 4b contains this permanent magnet powder. A soft chloroprene rubber 34 is used, and is molded by a known two-color molding method. As a result, the average specific gravity of this one-way valve 4 was 1.20 to 2.40, compared to a specific gravity of 1.40 to 3.40 when the entire one-way valve was molded from chloroprene rubber containing permanent magnet powder. It is approximately 13% lighter.

Permanent magnet powder 7 in one-way valve 4
are magnetized at pitches of 5 mm after molding the one-way valve 4, and the magnetic force thereof is 50 to 200 Gauss. As a result, the one-way valve 4 for the mouth frame body 2
The magnetic attraction force is set to about 0.2 to 7 g/cm2. A plurality of mounting holes 41 are provided at the upper end of the one-way valve 4 for insertion into the mounting protrusions 28 of the vertical wall 22 of the mouth frame body 2.

The one-way valve 4 constructed as described above is attached to the outdoor side surface of the mouth frame 2 in the following manner. That is, first, one-way valve 4
from the outdoor side to the inclined wall 21 so as to close the inside air outlet 24, and insert the mounting protrusion 28 of the vertical wall 22 into the mounting hole 41 at the upper end of the one-way valve 4. Next, a retainer 6 formed into an elongated plate shape made of polypropylene resin is attached to the upper end of the one-way valve 4,
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 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, this one-way valve 4 is as shown in FIG.
As shown in FIG. 2, substantially the entire part of the one-way valve 4, excluding the upper end attached to the vertical wall 22, is centered around the mounting part 42 (specifically, the boundary contact area between the one-way valve 4 and the lower edge of the retainer 6). It is possible to swing due to its elasticity.

According to the ventilation device of this embodiment constructed as described above, the facing layer 2a of the mouth frame 2 is formed of the polypropylene resin 32 containing the magnetically attractive powder 31, and the facing layer 2a of the one-way valve 4 Since the layer 4a is formed of the chloroprene rubber 34 containing the permanent magnet powder 33, the mouth frame 2
The magnetic adsorption force between the one-way valve 4 and the one-way valve 4 is ensured, and a gap does not occur between the one-way valve 4 and the mouth frame body 2.
The one-way valve 4 will not jump up due to vibrations while the car is running. Therefore, the sealing performance of the inside air outlet 24 is improved, and it is possible to prevent dirty outside air from flowing back into the room 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 adsorption force and the one-way valve 4's own weight due to negative pressure generated on the surface of the car body when the car is running, The one-way valve 4 moves away from the valve seat 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.

Further, the intermediate layer 2c of the mouth frame body 2 is formed of a polypropylene resin 32 that does not contain magnetically attractive powder, and the non-facing layer 4b of the one-way valve 4 is formed of a chloroprene rubber 34 that does not contain a permanent magnet powder. Since it was formed by
These mouth frame body 2 and one-way valve 4 do not increase in weight or cost compared to conventional ones.

Furthermore, the polypropylene resin 32 forming the facing layer 2a of the mouth frame body 2 is made soft, and the chloroprene rubber 34 forming the facing layer 4a of the one-way valve 4 is made soft.
Since it is made of a soft material, the impact of contact between the mouth frame body 2 and the one-way valve 4 is alleviated, and contact noise is less likely to occur. On the other hand, since the polypropylene resin 32 forming the intermediate layer 2c of the mouth frame body 2 is made of a hard material, the strength of the mouth frame body 2 is also ensured.

It should be noted that the present invention is not limited to the configuration of the above-mentioned embodiments, and can be implemented with arbitrary changes within the scope of the spirit of the invention.

[0033]

[Effects of the Invention] Since the ventilation system of the present invention is configured as claimed in claim 1 or 2, it is possible to improve the sealing performance of the inside air outlet by the one-way valve while suppressing an increase in the weight and cost of the ventilation system. This has the excellent effect of preventing dirty outside air from flowing back into the room from the inside air outlet.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of essential parts of a ventilation system according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the entire ventilation system.

FIG. 3 is a front view of the entire ventilation system.

FIG. 4 is a sectional view taken along line II in FIG. 3;

FIG. 5 is an enlarged sectional view taken along line II-II in FIG. 3;

[Explanation of symbols]

1 Internal air introduction duct
2 Mouth frame body 2a Opposing layer
2b Non-confronting layer 2c Intermediate layer
4 One-way valve 4a Opposing layer
4b Non-opposing layer 24 Internal air outlet
31 Magnetic adsorption powder 32 Polypropylene resin
33 Permanent magnet powder 34 Chloroprene rubber

Claims (2)

[Claims] 1. A ventilator comprising a mouth frame body having an inside air exhaust port, and a one-way valve that opens and closes the inside air exhaust port by contacting a peripheral edge of the inside air exhaust port of the mouth frame body, wherein the mouth frame body or the one-way valve has a two-layer structure of a facing layer and a non-facing layer with respect to the one-way valve or mouth frame body, and the facing layer is formed of synthetic resin or rubber containing magnetically attractive powder or permanent magnet powder, A ventilation device characterized in that the non-facing layer is formed of a synthetic resin or rubber that does not contain or contains only a small amount of magnetically attractive powder or permanent magnet powder. 2. A ventilator comprising: a mouth frame body having an inside air outlet; and a one-way valve that contacts a peripheral edge of the inside air outlet of the mouth frame body to open and close the inside air outlet; Alternatively, the one-way valve has a three-layer structure including a layer facing the one-way valve or the mouth frame body, a non-facing layer, and an intermediate layer thereof, and the facing layer and the non-facing layer are made of magnetically attractive powder or granular material of permanent magnet. 1. A ventilation device, characterized in that the intermediate layer is formed of a synthetic resin or rubber that does not contain or contains only a small amount of magnetically attractive powder or permanent magnet powder.