JPWO2017141962A1 - Ventilation register - Google Patents

Abstract

Providing ventilation registers that can suppress the increase in pressure loss while being able to collect extremely small contaminants with high probability. It is a ventilation register used in a natural air supply port, and is an insertion tube that is attached by being inserted into a ventilation port of a building, a filter medium through which gas passing through the insertion tube passes, and the insertion tube and the filter A ventilation resistor is provided, comprising a prefilter between the filter media, wherein the filter is a nanofilter. According to the ventilation register of the present invention, it is possible to efficiently perform ventilation by suppressing entry of foreign matter into the room and suppressing an increase in pressure loss.

Description

  The present invention relates to a ventilation register attached to a ventilation opening on the indoor side of a building.

  In order to ventilate the building, a ventilation opening may be provided on the indoor wall. Since such a ventilation port forms a through hole that communicates indoors and outdoors, a ventilation register having a filter may be attached to prevent foreign matter such as outdoor dust and raindrops from entering the room. This filter generally has a flat plate shape, and is disposed inside the ventilation opening or provided so as to cover the indoor side opening of the ventilation opening (see Patent Document 1 as an example).

  A ventilation register having an opening / closing mechanism that can block the ventilation path of the ventilation port as required is used (see Patent Document 2 as an example). By providing such an opening / closing mechanism, the ventilation path of the ventilation port can be freely opened and closed, so that a ventilation register that is convenient for the user can be provided.

Japanese Utility Model Publication No. 6-62017 JP 2005-282985 A

  In recent years, there are concerns about the health damage to human bodies caused by fine particulate matter floating in the atmosphere. Fine particulate matter is likely to enter deep into the respiratory tract, and is thought to affect the respiratory and circulatory systems. Current ventilation registers cannot adequately capture such fine particulate matter.

  The filter as described in Patent Document 1 has a small through hole that forms an air flow path. As the through hole is made smaller, it becomes possible to collect smaller foreign matters. However, if the through hole is made small, there is a problem that the air flow path is easily blocked and the pressure loss of the ventilation port increases. As a method for suppressing such an increase in pressure loss, it is conceivable to enlarge the ventilation port and the filter. However, in these cases, there is a problem that the ventilation register itself is increased in size, and the aesthetics on the indoor side of the building is easily damaged.

  In addition, a ventilation register as described in Patent Document 2 closes a ventilation port with a cover structure when the ventilation is not performed, and closes the ventilation port with a cover structure. The air passage can be opened and opened by being separated from the opening. Such a ventilation register has a manufacturing problem because it has a large number of parts such as a spring structure that assists pushing the cover structure from the ventilation port side to the indoor side when changing from the closed state to the open state. In addition, although a ventilation register that has a two-blade structure and can be opened is used, the cover structure has a complicated structure because it includes a mechanism for moving the two blades with a single lever. Therefore, it is difficult to manufacture efficiently and there is a problem in terms of cost. Furthermore, these conventional ventilation registers also have problems in use because the operator may need a strong force when operating the cover structure.

  The present invention has been made to solve the above problems. That is, an object of the present invention is to provide a ventilation register that can suppress the entry of foreign objects into the room and can suppress an increase in pressure loss without increasing the size.

  It is another object of the present invention to provide a ventilation register that has a simple structure, has a small number of parts, and is easy to manufacture. It is another object of the present invention to provide a ventilation register that is easy for a user to open and close.

In order to achieve the above object, the present invention is configured as follows.
(Item 1)
A ventilation register used in a natural air inlet,
An insertion tube that is inserted into the ventilation opening of the building and attached;
A prefilter through which the gas that has passed through the insertion tube passes,
A ventilation resistor comprising a nanofilter filter medium through which the gas that has passed through the prefilter passes.
(Item 2)
Item 2. The ventilation resistor of item 1, wherein the nanofilter has a fiber diameter of about 1 to about 250 nm and a pore size of about 5 to 10 m.
(Item 3)
The ventilation resistor of claim 2, wherein the nanofilter has a pleat with a pitch of about 3 to about 10 mm and a ridge height of about 5 to about 40 mm.
(Item 4)
The ventilation register according to any one of items 1 to 3, wherein a back space is provided between the pre-filter and the plug-in cylinder.
(Item 5)
Item 5. The ventilation register of item 4, wherein the backspace is about 5 mm or more.
(Item 6)
In any one of Items 3 to 5, the nanofilter collects about 70% or more of fine particles having a particle diameter of 0.5 to 1 μm with respect to an air flow of a linear velocity of 2.5 m / sec in the ventilation port. Ventilation register as described.
(Item 7)
The ventilation register according to item 6, wherein the ventilation register is for a ventilation port having a diameter of 100 mm, and the pressure loss coefficient of the ventilation register is 180 or less.
(Item 8)
8. The ventilation register according to item 7, wherein the pressure loss coefficient of the ventilation register is 80 or less.
(Item 9)
The ventilation register according to item 6, wherein the ventilation register is for a vent having a diameter of 150 mm, and the pressure loss coefficient of the ventilation register is 120 or less.
(Item 10)
The ventilation register according to item 9, wherein the pressure loss coefficient of the ventilation register is 60 or less.
(Item 11)
The ventilation register according to any one of Items 7 to 10, wherein a cross-sectional area of the nanofilter is about 2.0 to about 2.7 times a cross-sectional area of the ventilation port.
(Item 12)
A filter system for attaching to a ventilation register used in a natural air inlet, wherein the filter system includes a filter medium and a pre-filter, and the filter of the filter medium is a nanofilter;
The nanofilter is
Having a fiber diameter of about 1 to about 250 nm and a pore diameter of about 5 to 10 μm;
Having a pitch of about 3 to about 10 mm, and a pleat of a height of about 5 to about 40 mm;
The filter system is
A filter system that collects approximately 70% or more of fine particles having a particle diameter of 0.5 to 1 μm with respect to an air flow having a linear velocity of 2.5 m / sec in a ventilation port.
(Item 13)
An insertion tube that is inserted into the ventilation opening of the building and attached;
A face part capable of moving forward and backward with respect to the opening on the indoor side of the insertion tube,
A ventilation register comprising a cylindrical pleat filter having a plurality of pleat portions arranged in parallel along a circumferential direction,
The ventilation register according to claim 1, wherein an opening end on one side of the cylindrical pleated filter is attached to a back surface of the face portion.
(Item 14)
14. The ventilation register according to item 13, wherein the face portion includes a holding portion that holds the tubular pleated filter so as to be slidable with respect to the insertion tube.
(Item 15)
Item 15. The ventilation register according to Item 14, wherein a ventilation gap portion through which air that has passed through the cylindrical pleated filter passes is provided between the cylindrical pleated filter held by the holding unit and an inner peripheral surface of the insertion tube.
(Item 16)
Item 16. The ventilation register according to item 14 or item 15, wherein the holding unit includes a sealed portion between the holding portion and the tubular portion of the insertion tube.
(Item 17)
The ventilation register according to any one of Items 13 to 16, wherein the cylindrical pleated filter has a tapered shape from the outdoor side toward the indoor side.
(Item 18)
The ventilation register according to any one of items 13 to 17, wherein the face portion has a rectifying dome portion formed in a conical shape protruding toward an opening on the outdoor side of the insertion tube on the back surface.
(Item 19)
The ventilation register according to any one of items 13 to 18, wherein the face portion includes a seal portion that fixes the cylindrical pleated filter and seals a gap between the face pleated filter and the face portion.
(Item 20)
A plug-in tube installed in the ventilation opening of the building;
A cover body provided on the indoor side of the insertion tube;
A first wing body and a second wing body, which are attached to an air passage inside the plug-in cylinder, wherein the first wing body and the second wing body are rotated inside the plug-in cylinder. A first wing body and a second wing body which are pivotally supported and open and close the air passage by rotating each wing body;
A rotatable mounting shaft portion to be mounted on the plug-in cylinder or the cover body;
A pressing portion held by the first wing body so as to be displaceable in a radial direction of the insertion tube along a plate surface of the rotating first wing body at a position away from the mounting shaft portion; A pressing piece having
A ventilation register comprising: a connecting piece portion that allows one end side to be pivotally supported by the first wing body and the other end side to be pivotally supported by the second wing body so that the wing bodies can be linked to each other.
(Item 21)
The first wing body is rotated by being pressed by the pressing portion, the connecting piece portion is interlocked with the rotation of the first wing body, and the second wing body is interlocked with the connecting piece portion. 21. The ventilation according to item 20, wherein the first wing body and the second wing body are rotated in an opening direction or a closing direction to open and close a ventilation opening. register.
(Item 22)
The pressing piece portion is disposed between the first mounting shaft portion as the mounting shaft portion, the second mounting shaft portion, and the first mounting shaft portion and the second mounting shaft portion. A protruding portion that protrudes in a direction intersecting the axial direction of the pressing piece portion,
The first mounting shaft portion and the second mounting shaft portion are disposed on the rotation shaft of the pressing piece portion,
The ventilation register according to item 20 or item 21, wherein the pressing portion is disposed on a protruding end side of the protruding portion.
(Item 23)
The ventilation register according to any one of items 20 to 22, wherein the pressing portion and the attachment shaft portion are formed of a single member.
(Item 24)
24. The item 20 to the item 23, wherein the first wing body includes a wing piece and a holding portion that movably holds the pressing portion of the pressing piece portion between the wing piece. Ventilation registers.
(Item 25)
The ventilation register according to any one of Items 20 to 24, wherein the pressing piece includes an operation unit protruding from the cover body.

  That is, the present invention relates to a ventilation register including an insertion tube that is attached by being inserted into a ventilation opening of a building, and a face portion that is movable back and forth with respect to an opening portion on the indoor side of the insertion tube, along the circumferential direction Provided is a ventilation register comprising a cylindrical pleated filter having a plurality of pleated parts arranged in parallel, and an opening end on one side of the cylindrical pleated filter being attached to the back surface of the face part To do.

  In the present invention, a filter having a larger surface area can be disposed in a limited space by forming the filter in a pleated shape. Thus, by providing a pleated filter having a larger surface area, an increase in pressure loss can be suppressed without increasing the size of the entire ventilation register, and smooth ventilation can be performed.

  Moreover, by making such a pleated filter into a cylindrical shape, the exclusive area on the wall surface of the building can be reduced as compared with a case where the flat pleated filter is simply used. Furthermore, since the cylindrical pleat filter can be moved forward and backward with respect to the insertion tube by following the face portion, the amount of exposure of the cylindrical pleat filter to the indoor side can be changed by changing the position of the face portion relative to the insertion tube. You can adjust and adjust the ventilation.

  The face portion of the present invention may include a holding portion that holds the cylindrical pleated filter so as to be slidable with respect to the insertion tube.

  By doing so, the cylindrical pleated filter can be held so as not to drop out of the insertion tube. In addition, for example, it is easy to insert a cylindrical pleated filter inside the insertion tube to close the ventilation port, or to slide the cylindrical pleat filter and pull it out of the insertion tube to open the ventilation port. It can be carried out.

  Between the cylindrical pleated filter held by the holding part of the present invention and the inner peripheral surface of the insertion cylinder, there can be provided a ventilation gap part through which air that has passed through the cylindrical pleated filter passes.

  By doing so, it is possible to secure the air flow path that has passed through the cylindrical pleated filter by the ventilation gap. Therefore, since air can enter indoors smoothly, an increase in pressure loss can be suppressed.

  The holding part of the present invention may include a sealing part between the holding part and the cylindrical part.

  By doing so, it is possible to make it difficult for air that does not pass through the filter and the face portion to leak into the indoor side and enter.

  The cylindrical pleated filter of the present invention may be tapered from the outdoor side toward the indoor side.

  By doing so, an annular ventilation gap can be provided between the cylindrical pleated filter and the insertion cylinder so as to make one round of the outer periphery of the cylindrical pleated filter. Therefore, the air that has passed through the cylindrical pleated filter can enter the indoor more smoothly.

  The face part of the present invention may have a rectifying dome part projecting toward the outdoor side opening part of the insertion tube on the back surface.

  The shape of the rectifying dome can take any shape as long as the air that has entered the insertion tube can be smoothly guided to the cylindrical pleated filter. A conical shape is preferable, and a conical shape is more preferable. By providing the rectifying dome part, the air flows smoothly along the shape of the rectifying dome part, so that the situation where the air hits the back surface of the face part and turbulent flow occurs inside the insertion tube can be prevented, An increase in pressure loss can be suppressed.

  The face portion of the present invention has a seal portion for fixing the cylindrical pleated filter and sealing a portion between the cylindrical pleated filter.

  By doing so, it is possible to make it difficult for air containing foreign matter to enter the indoor space between the face portion and the cylindrical pleated filter.

  The cylindrical pleated filter of the present invention may be made of a filter medium having a through hole having a size of 0.3 μm or less.

  By doing so, it is possible to suppress the intrusion of foreign substances such as very small contaminants such as PM2.5 and PM0.5 into the room.

  Further, the present invention provides an insertion tube installed at a ventilation opening of a building, a cover body provided on the indoor side of the insertion tube, a first wing body and a second wing body attached to an air passage inside the insertion tube. A ventilation register having a wing body, the first wing body and the second wing body are pivotally supported inside the insertion tube so as to be rotatable, and each wing body is rotated to open and close the air passage. About the pivotable mounting shaft portion to be attached to the plug-in tube or the cover body, and the radial displacement of the plug-in tube along the plate surface of the rotating first wing body at a position away from the mounting shaft portion. A pressing piece having a pressing portion that is held by the first wing body, and one end side is pivotally supported by the first wing body and the other end side is pivotally supported by the second wing body. A connecting piece portion that connects the bodies so as to be interlocked, the first wing body is pressed and rotated by the pressing piece portion, the connecting piece portion is interlocked with the rotation of the first wing body, and Second wing A ventilation register characterized in that the first wing body and the second wing body rotate in the closing direction or the opening direction to open and close the ventilation port by rotating in conjunction with the connecting piece portion. A ventilation register is provided.

  In the present invention, by rotating the pressing piece portion, the pressing portion presses and rotates the first wing body, and further, the second wing body can be rotated via the connecting portion. Therefore, the opening / closing operation of the air passage can be performed by a simple operation of rotating the pressing piece. In addition, since the number of parts can be reduced as compared with the conventional ventilation register in which the cover structure is drawn out to the indoor side, the ventilation register has a simpler structure and is easy to manufacture and advantageous in terms of cost.

  The pressing piece of the present invention is disposed between the first mounting shaft portion as the mounting shaft portion, the second mounting shaft portion, and the first mounting shaft portion and the second mounting shaft portion. And a projecting portion projecting in a direction intersecting the axial direction of the pressing piece portion, and the first mounting shaft portion and the second mounting shaft portion are arranged on the rotation shaft of the pressing piece portion. The pressing portion may be disposed on the protruding end side of the protruding portion.

  By setting it as such a structure, the press part which can press a 1st wing body reliably can be formed, making a press piece part into a simpler structure.

  The pressing part of the present invention and the mounting shaft part may be formed of a single member.

  By adopting such a configuration for the pressing piece portion, the force for rotating the pressing piece portion is smoothly transmitted to the first wing body, and compared with the case where the pressing piece portion is composed of a plurality of members, thereby making it easier to rotate. be able to. Therefore, the operator can open and close the first wing body and the second wing body with a lighter force.

  The first wing body of the present invention may include a wing piece and a holding portion that movably holds the pressing portion of the pressing piece portion between the wing piece.

  By having such a holding portion, the first wing body can be rotated in the opening direction or the closing direction by pressing the blade piece or the holding portion of the first wing body. Further, since the holding portion can hold the pressing portion so as to be movable, the rotation axis of the first wing body and the pressing piece portion are different, and the pressing portion is displaced with respect to the first wing body during rotation. Even so, the holding unit can reliably hold the pressing unit.

  The pressing piece portion of the present invention may include an operation portion protruding from the cover body.

  Thereby, since an operator can touch an operation part easily, rotation operation of a 1st wing piece and a 2nd wing piece can be performed easily.

  According to the ventilation register of the present invention, it is possible to efficiently perform ventilation by suppressing entry of foreign matter into the room and suppressing an increase in pressure loss.

  According to the ventilation register of the present invention, it is possible to provide a ventilation register that has a small number of parts and is easy to manufacture. Further, according to the present invention, it is possible to provide a ventilation register that can easily open and close the air passage and is easy for the operator to operate.

The perspective view which shows the ventilation register of 1st Embodiment. The side view which shows the ventilation register | resistor of FIG. The rear view which shows the ventilation register | resistor of FIG. FIG. 3 is a sectional view taken along the line SA-SA in FIG. 2. Sectional drawing which shows the state which closed the insertion cylinder indoor side opening part of FIG. Explanatory sectional drawing which shows the flow path of air. It is a front view which shows the face part of a modification, Comprising: (a) shows the example of the face part which becomes substantially circular along the outer diameter of an insertion cylinder, and (b) shows the face which becomes substantially triangular shape The example of a part is shown. The perspective view which shows the front of the ventilation register of 2nd Embodiment, a left side, and a plane. The perspective view which shows the front of the ventilation register | resistor of FIG. 8, a right side surface, and a bottom face. The front view of the closed state of the ventilation register of FIG. The front view of the open state of the ventilation register | resistor of FIG. The rear view of the closed state of the ventilation register of FIG. The rear view of the open state of the ventilation register of FIG. The front view which shows the rotational axis of the 1st wing body of the ventilation register | resistor of FIG. 8, the rotational axis of the 2nd wing body, and the rotational axis of a press piece part. The perspective view of the front side which shows the opening-closing structure of the closed state with which the ventilation register | resistor of FIG. 8 is provided. The perspective view of the front side which shows the open / close structure of the open state with which the ventilation register | resistor of FIG. 8 is provided. The perspective view of the back side which shows the opening-closing structure of the closed state with which the ventilation register | resistor of FIG. 8 is provided. The bottom view which shows the opening-closing structure of the closed state with which the ventilation register | resistor of FIG. 8 is provided. The bottom view which shows the open / close structure of the open state with which the ventilation register | resistor of FIG. 8 is provided. The figure which shows the ventilation register equipped with the nano filter. The figure which shows the ventilation register | resistor which covered and attached the cover body provided with a nano filter and a pre filter to the existing indoor register | resistor. The pressure loss curve figure of the ventilation register which set the conventional ventilation filter which set the electrostatic filter, and the ventilation register which set two kinds of nano filters which gave pleat processing of three kinds of different pitches. The figure which shows the time-sequential change of pressure loss of an electrostatic filter, a micro filter, and a nano filter. The figure which shows the comparison of the collection efficiency of an electrostatic filter, a micro filter, and a nano filter. The figure which shows the result of having examined the influence which it has on the pressure loss of a back space. The figure which shows the measuring method of pressure loss.

  The invention will now be described, by way of example, with reference to the accompanying drawings, where appropriate. Throughout this specification, it should be understood that expression in the singular also includes the concept of the plural unless specifically stated otherwise. In addition, it is to be understood that the terms used in the present specification are used in the meaning normally used in the art unless otherwise specified. Thus, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.

(Definition)
In the present specification, the “nanofilter” refers to a filter including at least a part of nanofibers. “Nanofiber” in the present specification refers to a fiber having a fiber diameter of 1 to 800 nm or less. The nanofiber may be a single fiber dispersed, a single fiber partially bonded, or an aggregate (for example, a bundle) in which a plurality of single fibers are aggregated.

  In this specification, the “fiber diameter” means the fiber collected from the filter medium is observed with an optical microscope, the fiber diameter in terms of perfect circle is measured for 30 fibers, and the fiber diameter in terms of the true circle is measured. Is obtained by dividing the total by the number of fibers measured.

  In the present specification, “pore size” means that a filter is measured with a pore size distribution measuring device (for example, an automatic pore size distribution measuring device Palm Porometer manufactured by Porous Materials Inc., USA). The mean flow pore size.

In this specification, “collection efficiency” means the number of particles of a specific size upstream and downstream of a filter measured with a particle counter (for example, TSI Inc. particle counter (model 3771)),
Collection efficiency = 1− (number of downstream particles / number of upstream particles) × 100
The value calculated by

  In the present specification, the “particle size” of a particle means the diameter of a circle circumscribing the particle when the particle is viewed from an arbitrary direction. The particle diameter can be measured by, for example, enlarging 1000 times or more with a microscope such as a scanning electron microscope and taking a photograph. For the average particle diameter, 50 or more particles are selected at random and set as the average value of the particle diameters. Hereinafter, in this specification, “particle diameter” means all “average particle diameter”.

  In this specification, “PM2.5” refers to a fine particulate material having a particle size of 2.5 μm or less.

(Detailed explanation)
There are three main types of indoor ventilation. The first type is a first type ventilation system in which supply and exhaust are forcibly performed by a machine (electric fan). The second type is a second type ventilation system forcibly performing natural ventilation on the exhaust side and mechanical ventilation on the supply side. This is often used in a clean room or the like, and is rarely used in a house. The third type is a type 3 ventilation system that forcibly exhausts air by mechanical ventilation and supplies the air through a natural air inlet (indoor ventilation register).

  Unlike the air supply port for mechanical ventilation in the first type ventilation system or the second type ventilation system, the air supply port in the third type ventilation system supplies air by natural air supply. Traditionally, it has been emphasized that resistor filters have low pressure loss. This is because if the pressure loss of the ventilation register is large in the third type ventilation system, the motor capacity of the required electric exhaust fan increases and there is a risk of decompression in the room. In addition, while the air intakes of the first type ventilation system and the second type ventilation system have a constant air volume, the air supply ports of the third type ventilation system also have a large variation in the air volume. The ventilation register is different from the air inlets of the first and second type ventilation systems.

  The present inventors have unexpectedly found that a nanofilter medium can be used as a ventilation register in the third type ventilation system. At first glance, nanofilter media seem to be the same as non-woven fabric and have a high surface density, so it is considered in the field that it cannot be used for the ventilation register of the third type ventilation system from the viewpoint of pressure loss. ing. For example, in recent years, in a room of a building such as a condominium where a third-class ventilation system is generally used, the room itself has a high sealing performance. Pressure may be generated, and children may not be able to open the door with the help of children. Thus, pressure loss is a particular problem for the ventilation register of the third type ventilation system. Actually, only the electrostatic filter and the micro filter using the fiber having a fiber diameter of 1 μm or more are used for the ventilation register of the third type ventilation system.

  However, the present inventors have found that the use of the nanofilter filter medium as a ventilation resistor can dramatically improve the collection efficiency of fine particulate matter, which is comparable to conventional ventilation resistors and pressure loss. discovered.

  In the present invention, the fiber diameter of the nanofilter used in the ventilation register of the natural air inlet is about 1 to about 800 nm, about 1 to about 500 nm, about 1 to about 300 nm, about 1 to about 250 nm, about 30 to about 800 nm. , About 30 to about 500 nm, about 30 to about 300 nm, about 30 to about 250 nm, preferably about 50 to about 250 nm, more preferably about 50 to about 150 nm.

  In the present invention, the pore size of the nanofilter used for the ventilation register of the natural air inlet is about 3 to about 15 μm, preferably about 5 to about 7 μm.

  In nanofilters, those skilled in the art can adjust the pressure loss and the collection efficiency of micromaterials by balancing the pore size and fiber diameter. In a preferred embodiment, the nanofilter of the present invention is about 50 to about 150 nm. And a pore size of about 3 to about 15 μm.

  The nanofilter of the present invention can be formed of any material. Such materials include polytetrafluoroethylene (PTFE), polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyamide (PA), polyacrylonitrile (PAN), polyfluoride. Examples thereof include, but are not limited to, vinylidene chloride (PVdF), polyvinyl alcohol (PVA), polyurethane (PU), and the like. In a preferred embodiment, the nanofilter of the present invention may be made of PTFE.

  The nanofilter of the present invention may be provided with a breathable support layer on the upper surface and / or the lower surface as necessary. The nanofilter of the present invention may also comprise an additional second filter layer.

  The thickness of the nanofilter of the present invention may be about 3 to about 50 μm, more preferably about 3 to about 20 μm, and even more preferably about 3 to about 10 μm. For example, a filter using glass fiber is known as a filter having a high collection efficiency, but such a filter generally has a thickness exceeding 100 μm in many cases. From the viewpoint of the design of the ventilation register, a thinner one is preferable.

  In this invention, you may provide the ventilation register excellent in collection efficiency and pressure loss by covering a nano filter to the existing indoor ventilation register, and attaching to a 3rd type | mold ventilation indoor register. By doing in this way, a high performance filter can be easily attached to many existing buildings.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.

(First embodiment [FIGS. 1 to 6])
The ventilation register 1 of the present invention is attached to the indoor side of a ventilation opening 2 provided on the inner wall 5 of a building, and is used to suppress the entry of foreign matter such as outdoor dust and raindrops into the room. Such an indoor register 1 includes an insertion tube 3 and a face portion 4 as shown in FIGS.

(Insert tube)
The plug-in cylinder 3 has a substantially cylindrical shape as shown in FIG. The air 11 a that has entered the ventilation port 2 can pass through the inside of the insertion tube 3. Moreover, the insertion tube 3 can be inserted and attached to the ventilation opening 2 opened to the inner wall 5 of a building. An outward flange 6 directed outward from the indoor opening end 3 a of the plug-in cylinder 3 is provided, and a screwing portion S is provided on the outward flange 6. Further, the outward flange 6 has an outer frame portion 6a along its outer shape. The material of the insertion tube 3 can take any material. For example, a metal such as aluminum or stainless steel or a plastic material such as resin may be used. In a preferred embodiment, the insertion tube 3 is provided by a resin material that can be reduced in weight, but the present invention is not limited to this. As long as the shape of the plug-in cylinder is a cylinder, it can take any form. For example, it may be a triangular cylinder, a square cylinder, a polygonal cylinder, or a cylinder.

[Face part]
As shown in FIGS. 1 to 5, the face portion 4 includes a flat plate portion 7, a rectifying dome portion 7 b, a cylindrical pleat filter 8 provided on the back surface of the flat plate portion 7 (a surface facing the insertion tube 3), A holding portion 9 for the insertion tube 3 is provided. In this embodiment, the case where a pleated filter is used as an example of a cylindrical filter is illustrated, but pleating is not always necessary, and the case where a cylindrical filter that is not pleated is used is also within the scope of the present invention. Of course it should be understood. The material of the face portion 4 can be any material. For example, a metal such as aluminum or stainless steel or a plastic material such as resin may be used. In a preferred embodiment, the face portion 4 is provided by a resin material that can be reduced in weight, but the present invention is not limited to this.

  The flat plate portion 7 has a substantially square thin plate shape, and a knob portion 7a made of a thin plate piece is provided on the surface side exposed to the indoor side when attached to the inner wall 5 of the building. The face portion 4 is slidable in the forward / backward direction with respect to the insertion tube 3. Therefore, the user can pull out the face part 4 from the insertion tube 3 to the indoor side by pinching the knob part 7a with a finger and pulling it to the indoor side. The flat plate portion 7 has substantially the same shape as the outward flange 6, and the flat plate portion 7 is slid and moved to the outward flange 6 side, inside the outer frame portion 6 a of the outward flange 6. Can be stored.

  The rectifying dome portion 7 b is provided at a substantially central position on the back surface of the flat plate portion 7, and has a substantially conical shape protruding toward the outdoor side opening end 3 b of the insertion tube 3. It forms so that the ratio which expands may become large as it falls from the front end side (outdoor side) to the skirt side (indoor side) (refer FIGS. 4-6).

  Further, on the back surface of the flat plate portion 7, a support portion 12 that makes a round around the outer periphery of the tubular pleated filter 8 on the indoor side opening end 8 b side is formed. Further, the outer shape of the support portion 12 is formed so as to follow the inner shape of the insertion tube 3. The support portion 12 can contact the inner surface of the insertion tube 3 to support the face portion 4 from the inside of the insertion tube 3 (see FIG. 5).

  The cylindrical pleated filter 8 is made of a cylindrical filter medium, and has a plurality of pleated portions 8a arranged in parallel along the periphery thereof. Such a cylindrical pleat filter 8 is composed of a pleat filter in which a plurality of pleat portions 8a are provided by bending a single filter medium. By providing a plurality of pleat portions 8a in this manner, it is possible to use a filter having a larger surface area in a limited space as compared with the case of simply using a flat filter. Therefore, it can be set as the ventilation register 1 which can suppress a pressure loss. The size of the filter medium to be used can be variously changed according to the size of the ventilation register 1 and the target ventilation performance. Therefore, according to the size of the filter medium and the size of the insertion tube 3, the number of pleat portions 8 a included in the tubular pleat filter 8 can be variously set.

  Furthermore, in the first embodiment, the tubular pleat filter 8 is formed by bending the pleat filter in the parallel direction of the pleat portion 8a into a tubular shape. The outer diameter of the tubular pleated filter 8 is formed slightly smaller than the inner diameter of the insertion tube 3. By making the pleated filter into a cylindrical shape, the exclusive area on the inner wall 5 can be reduced as compared with a flat pleated filter. Therefore, the ventilation register 1 can be made compact as a whole. In addition, when not in use, the tubular pleated filter 8 can be housed inside the insertion tube 3, so that the indoor aesthetics can be maintained. In the first embodiment, the cylindrical pleated filter 8 is a cylindrical body, but the present invention is not limited to this. The tubular pleated filter 8 can take the form of an arbitrary tubular body in accordance with the shape of the tubular body of the insertion tube 3. For example, a triangular cylinder, a square cylinder, or a polygonal cylinder may be used.

  The cylindrical pleated filter 8 is provided so as to taper from the outdoor side opening end 8 c side to the indoor side opening end 8 b side, and the narrow indoor side opening end 8 b side is formed on the back surface of the face portion 4. It is fixed. A contact portion between the indoor side opening end 8b and the face portion 4 is sealed with a seal portion 10a such as an adhesive. By doing so, it is possible to prevent a gap between the face portion 4 and the cylindrical pleated filter 8 from being generated, so that foreign matter that has entered the ventilation chamber 3c of the cylindrical pleated filter 8 from the opening end 3b of the insertion cylinder 3 can be prevented. Only the purified air can surely pass through the tubular pleated filter 8 without leaking the air 11a contained therein. Further, by attaching such a cylindrical pleated filter 8 to the face portion 4 exposed to the indoor side, the filter medium can be easily replaced as compared with the case where it is provided inside the plug-in cylinder 3, for example.

  As described above, the tubular pleated filter 8 has a shape that tapers from the outdoor side opening end 8 c toward the indoor side opening end 8 b, so that the ventilation gap portion 11 is formed between the inner peripheral surface of the insertion tube 3. Is done. Therefore, since the air 11a that has passed through the tubular pleat filter 8 can form a flow path in the ventilation gap 11, the passage can be smoothly entered indoors without being blocked by the insertion tube 3. Since the cylindrical pleat filter 8 has a tapered shape as described above, such a ventilation gap portion 11 is provided in an annular shape so as to go around the outer periphery of the cylindrical pleated filter 8. The ventilation gap 11 is formed so as to greatly expand from the outdoor side toward the indoor side. Therefore, the air 11a that has entered the ventilation gap 11 can smoothly enter the indoor side without stagnation on the indoor side opening end 3b side of the insertion tube 3.

  In 1st Embodiment, what has a through-hole smaller than the foreign material used as collection object is used as a filter medium. In recent years, air pollution caused by extremely small pollutants such as PM2.5, whose maximum particle size is said to be about 2.5 μm, has become a social problem. Needs to be a small hole of 2.5 μm or less. Since PM2.5 is a very small contaminant of 2.5 μm or less, for example, by using a filter medium having a through hole of about 0.3 μm, not only PM2.5 but also PM0. Very small foreign substances such as 5 can be collected with high probability, and intrusion into the room can be suppressed. A preferred filter medium is the above-described nanofilter medium, but is not limited thereto. When it is not necessary to collect such a small foreign substance, a filter medium having a larger through hole may be used.

  For example, such filter media can be water-repellent to prevent intrusion of raindrops indoors. Therefore, it is not necessary to close the lid for preventing the entry of foreign matter such as raindrops indoors, and the ventilation register 1 that is highly convenient for the user can be obtained.

  The holding portion 9 has a ring shape and is fixed to the outdoor side opening end 8 c of the tubular pleated filter 8. Moreover, the contact part of the holding | maintenance part 9 and the outdoor side opening end 8c is sealed with the seal | sticker part 10b which consists of adhesive agents etc. In this way, it is possible to block the gap and prevent foreign matter from entering the indoor side. A prefilter 13 is attached to the inside of the holding portion 9. The prefilter 13 is a filter medium having a larger through-hole than the filter medium forming the cylindrical pleated filter 8, and removes foreign matters such as dust and rain having a large particle diameter that enter the inside of the ventilation port 2 from the outside. Can be collected. In the first embodiment, the holding portion 9 has a ring shape, but the present invention is not limited to this. The shape of the holding portion 9 can take any shape in accordance with the shape of the inner wall of the insertion tube 3.

  A sealing part 9 a is attached to the outer periphery of the holding part 9. The sealing portion 9a is made of an elastic body such as rubber or packing, and has a diameter set slightly larger than the diameter of the inner periphery of the insertion tube 3. When the holding portion 9 is inserted into the insertion tube 3, the sealing portion 9 a is compressed and pressed against the inner surface of the insertion tube 3. Since the portion between the inner peripheral surface of the insertion tube 3 and the holding portion 9 can be sealed in this way, the air 11a that does not pass through the filter medium can be prevented from entering the room indoors. However, the sealing portion 9a is not completely fixed while sealing the portion between the inner peripheral surface of the insertion tube 3 and the holding portion 9, and can slide against the inner surface of the insertion tube 3. . Therefore, such a sealing part 9a does not prevent the sliding movement of the face part 4 with respect to the insertion tube 3.

[Explanation of usage]
As shown in FIGS. 4 and 5, the ventilation register 1 is attached to a ventilation port 2 provided on the inner wall 5 of the building. Specifically, the inner diameter of the ventilation port 2 is provided to be approximately the same as the outer diameter of the insertion tube 3, and the insertion tube 3 is inserted into the ventilation port 2. On the outer peripheral surface of the plug-in cylinder 3, a packing (not shown) that fills the gap between the inner peripheral surface of the ventilation port 2 is arranged. Thereafter, the ventilation register 1 can be fixed to the inner wall 5 by screwing the screwing portion S of the outward flange 6.

  The cylindrical pleat filter 8 can be inserted into the insertion tube 3 by pushing the flat plate portion 7 of the face portion 4 toward the outward flange 6 side of the ventilation register 1 installed in the ventilation port 2 in this way. In this way, by closing the indoor side opening end 3a of the insertion tube 3 with the flat plate portion 7, it is possible to prevent outside air from entering the room. In addition, when not in use, the cylindrical pleat filter 8 is inserted into the insertion tube 3 to reduce the amount of protrusion to the indoor side so that the indoor aesthetics are not impaired. On the other hand, by pulling the flat plate portion 7 away from the outward flange 6, the indoor side opening end 3a can be opened to perform ventilation. Furthermore, the ventilation amount can be adjusted without fully pulling out the face portion 4.

[Method of suppressing increase in pressure loss]
Since the ventilation register 1 of the first embodiment includes the cylindrical pleat filter 8 having the plurality of pleat portions 8a as described above, the surface area is limited in a limited space as compared with the case where the flat pleated filter is provided. Can be bigger. Therefore, an increase in pressure loss can be suppressed.

  Moreover, the ventilation register 1 of 1st Embodiment has the rectifying dome part 7b as mentioned above. The air 11a that has entered the ventilation chamber 3c is smoothly guided toward the cylindrical pleat filter 8 along the inclination of the rectifying dome portion 7b as shown in FIG. Therefore, it is possible to prevent a situation in which the air 11a stays inside the ventilation chamber 3c and a turbulent flow is generated, so that an increase in pressure loss can be suppressed. In particular, the rectifying dome portion 7b of the first embodiment is formed so that the rate of expansion increases as it falls from the tip side (outdoor side) to the skirt side (indoor side) as described above (FIGS. 4 and 4). 5). In this way, the air 11a smoothly travels on the surface of the rectifying dome portion 7b as compared with the case where it is provided as a regular conical shape that spreads evenly from the tip side to the hem side. (See FIG. 6. In FIG. 6, the pleat portion 8a is partially omitted to show the flow of air 11a).

  As described above, by using the ventilation register 1 of the first embodiment, foreign substances such as smaller contaminants can be collected. Moreover, since the increase in pressure loss can also be suppressed, not only forced ventilation but natural ventilation can be performed smoothly.

Modification [FIG. 7]:
In the said 1st Embodiment, the face part 4 and the outward flange 6 showed the example which becomes substantially square. However, the cylindrical pleated filter 8 of the first embodiment has a substantially circular cylindrical shape with the same diameter as the insertion cylinder 3 and is inserted into the insertion cylinder 3, so that the face portion 4 and the outward flange 6 Does not affect the shape. Therefore, if the screwing portion S can be provided on the outward flange 6, for example, the ventilation portion 14 in which the face portion 4 and the outward flange 6 are substantially circular (see FIG. 7A) or a ventilation that is substantially triangular is used. The shape of the face portion 4 and the outward flange 6 can be freely designed, such as the register 15 (see FIG. 7B). Therefore, it can be set as the ventilation register 1 which has a higher aesthetic appearance.

(Second Embodiment [FIGS. 8 to 19])
Hereinafter, the ventilation register 51 of 2nd Embodiment is demonstrated, referring drawings.

  In the present specification, the ventilation register 51 includes the first wing body 53 and the second wing body 54 in the parallel direction X, the ventilation direction of the ventilation register 51 is the front-rear direction Y, and the ventilation register 51 is provided. The height direction along the rotation axis A1 of the first wing body 53 and the rotation axis A2 of the second wing body 54 is described as the Z direction. However, such description does not limit the method of using the ventilation register 51 or the installation location. Further, the structure and operation method of the first wing body 53 and the second wing body 54 using the left-right direction X and the front-rear direction Y will be described unless otherwise specified. The case where the body 54 is in the closed state will be described as a reference.

  The ventilation register 51 of 2nd Embodiment is attached to the ventilation opening provided in the inner wall of a building, and can open and close a ventilation opening. As shown in FIGS. 8 and 9, the ventilation register 51 includes an insertion tube 52, a cover body 57, and an opening / closing structure 51A. Particularly in the second embodiment, the ventilation register 51 is attached to the ventilation port so that the rotation axis A1 of the first wing body 53 and the rotation axis A2 of the second wing body 54 are along the vertical direction. In the pressing piece portion 56, the side where the operation portion 56c2 is provided is disposed on the lower side, and the other end side is disposed on the upper side. However, the ventilation register 51 may be configured such that, for example, the operation unit 56c2 is disposed on the upper side depending on the installation location, or the rotation axis A1 of the first wing body 53 and the rotation axis of the second wing body 54. You may attach so that A2 may follow the crossing direction with respect to a perpendicular direction.

(Insert tube)
The insertion tube 52 has a substantially cylindrical shape as shown in FIGS. The air that has entered the ventilation port can pass through the ventilation path R inside the insertion tube 52. Further, the insertion tube 52 can be attached by being inserted into a ventilation opening opened on the inner wall of the building. In the second embodiment, the case where the shape of the plug-in cylinder 52 is substantially cylindrical has been described, but the present invention is not limited to this. The shape of the plug-in cylinder 52 can be any form as long as it is a cylinder. For example, a triangular cylinder, a square cylinder, or a polygonal cylinder may be used.

[Cover body]
The cover body 57 is formed to expand from the indoor opening 52a of the plug-in cylinder 52 in the outer peripheral direction. Further, the cover body 57 has an outer frame portion 57 a along its outer shape and a cover portion (not shown) that covers the indoor side of the insertion tube 52.

[Opening and closing structure]
As shown in FIGS. 15 to 17, the opening / closing structure 51 </ b> A includes a first wing body 53, a second wing body 54, a connecting piece portion 55, and a pressing piece portion 56.

[First wing]
The first wing body 53 has a substantially semicircular plate shape and is pivotally supported by the insertion tube 52 so as to be rotatable. Specifically, the first wing body 53 has a fixing portion 53a fixed to the inner upper surface of the insertion tube 52 and a fixing portion 53b fixed to the inner lower surface. The wing body 53 rotates around a rotation axis A1 connecting the fixed portion 53a and the fixed portion 53b. Such a rotation axis A1 is arranged closer to the center of the insertion tube 52 than the center of the first wing body 53 in the left-right direction X. In the second embodiment, the case where the shape of the first wing body 53 is substantially semicircular has been described, but the present invention is not limited to this. As long as the shape of the 1st wing | blade body 53 is a shape in alignment with the outer edge of the insertion cylinder 52, it may be arbitrary forms. For example, if the insertion cylinder 52 is a triangular cylinder, the first wing body 53 may be a triangle. If the insertion cylinder 52 is a square cylinder, the first wing body 53 is a square. Alternatively, if the plug-in cylinder 52 is a polygonal cylinder, the first wing body 53 may be a half-polygon.

  As shown in FIG. 14, the first wing body 53 includes an outer peripheral side portion 53A on the outer peripheral side of the insertion tube 52 with respect to the rotation axis A1 in the left-right direction X, and the center of the insertion tube 52 with respect to the rotation shaft A1. Side central side portion 53B. As described above, since the rotation axis A1 is disposed on the center side of the insertion tube 52 with respect to the center of the first wing body 53 in the left-right direction X, the length in the left-right direction X of the center side portion 53B is The outer peripheral side portion 53A is formed shorter than the length in the left-right direction X. The outer peripheral side 53A and the central side 53B rotate in directions opposite to each other when the first wing body 53 rotates around the rotation axis A1. That is, when the outer peripheral side portion 53A rotates to the outdoor side, the central side portion 53B rotates to the indoor side, and conversely, when the outer peripheral side portion 53A rotates to the indoor side, the central side portion 53B rotates to the outdoor side. To do.

  As shown in FIG. 10, the first wing body 53 has a wing piece 53c and a holding portion 53d provided on the plate surface of the wing piece 53c. The blade piece 53c is a plate-like portion that opens and closes the air passage R. The holding portion 53d is substantially U-shaped and is formed to protrude from the outer peripheral side portion 53A to the indoor side. A movable gap 53e is formed between the holding portion 53d and the blade piece 53c, and the pressing portion 56a of the pressing piece portion 56 is disposed in the movable gap 53e. When the pressing piece portion 56 rotates, the pressing portion 56a can move in the movable gap 53e. The holding portion 53d has a first protrusion 53d1 that protrudes into the movable gap 53e on one end side in the left-right direction X, and a second protrusion that similarly protrudes into the movable gap 53e on the other end side. The protrusion 53d2 is formed (FIG. 19). In the second embodiment, the holding portion 53d is substantially U-shaped, but the present invention is not limited to this. For example, it may be substantially U-shaped or substantially V-shaped.

  As shown in FIGS. 11 to 13, 18, and 19, the outer peripheral side portion 53 </ b> A of the first wing body 53 has a first shaft support portion of a connecting piece portion 55, which will be described later, on the plate surface on the outdoor side. 55a is rotatably supported.

[Second wing]
Similar to the first wing body 53, the second wing body 54 has a substantially semicircular plate shape, and the end face 54c of the second wing body 54 and the end face 53f of the first wing body 53 face each other. In this state, a substantially circular flat plate portion that covers the indoor opening 52a of the insertion tube 52 and closes the air passage R is formed. In the second embodiment, the case where the shape of the second wing body 54 is substantially semicircular has been described, but the present invention is not limited to this. Similarly to the first wing body 53, the second wing body 54 may have any shape as long as the shape follows the outer edge of the insertion tube 52. For example, if the insertion cylinder 52 is a triangular cylinder, the second wing body 54 may be a triangle. If the insertion cylinder 52 is a square cylinder, the second wing body 54 is a square. Alternatively, if the plug-in cylinder 52 is a polygonal cylinder, the second wing body 54 may be a semi-polygon.

  Similar to the first wing body 53, the second wing body 54 is pivotally supported with respect to the insertion tube 52. Specifically, the second wing body 54 has a fixing portion 54a fixed to the inner upper surface of the insertion tube 52 and a fixing portion 54b fixed to the inner lower surface. The wing body 54 rotates about a rotation axis A2 connecting the fixed portion 54a and the fixed portion 54b. The rotation axis A2 is disposed closer to the center of the insertion tube 52 than the center in the left-right direction X of the second wing body 54, and the length of the center side portion 54B in the left-right direction X is the outer peripheral side portion 54A. Is shorter than the length in the left-right direction X. The rotation axis A2 of the second wing body 54 is disposed in parallel with the rotation axis A1 of the first wing body 53.

  As shown in FIG. 14, the second wing body 54 has an outer peripheral side portion 54A on the outer peripheral side of the insertion tube 52 with respect to the rotation axis A2 in the left-right direction X, and the center of the insertion tube 52 with respect to the rotation shaft A2. Side central side portion 54B. The outer peripheral side portion 54A and the central side portion 54B rotate in directions opposite to each other when the second wing body 54 rotates about the rotation axis A2. That is, when the outer peripheral side portion 54A rotates to the outdoor side, the central side portion 54B rotates to the indoor side, and conversely, when the outer peripheral side portion 54A rotates to the indoor side, the central side portion 54B rotates to the outdoor side. .

  A fixed portion 54d on which the second shaft support portion 55b of the pressing piece portion 56 is pivotally supported is formed on the outer side plate surface of the center side portion 54B of the second wing body 54. The fixed portion 54d is formed as a concave structure provided on the outdoor plate surface of the second wing body 54, and the fixed portion 54d protrudes from the indoor plate surface of the second wing body 54. .

[Connected piece]
The connecting piece 55 has a rod-like shape, and connects the first wing body 53 and the second wing body 54. The connecting piece portion 55 is provided on one end side, the outer peripheral side portion 53A of the first wing body 53, which is provided on the other end side, and the first shaft supporting portion 55a that is pivotally supported on the outdoor plate surface. It has the 2nd axial support part 55b which is the center side part 54B in the 2nd wing | blade body 54, and is axially supported by the board surface of an outdoor side.

(Pressing part)
As shown in FIGS. 9 to 11, the pressing piece portion 56 is formed by bending a rod, and includes a first attachment shaft portion 56 b, a second attachment shaft portion 56 c, and a protruding portion 56 </ b> A. The material of the rod forming the pressing piece 56 can be any material. For example, it may be a hardened plastic resin, wood, or a metal such as stainless steel or aluminum.

  The first and second mounting shaft portions 56b and 56c are arranged on the same axis along the height direction Z, and are formed of straight bar pieces. At the upper end of the first mounting shaft portion 56b, there is provided a rotation fixing portion 56b1 that is pivotally supported with respect to the upper side of the inner surface of the outer frame portion 57a of the cover body 57. A rotation fixing portion 56c1 is provided below the second mounting shaft portion 56c. The rotation fixing portion 56c1 is rotatably supported with respect to the lower side of the inner surface of the outer frame portion 57a of the cover body 57. The first attachment shaft portion 56b and the second attachment shaft portion 56c are formed with the same length. Further, the lower side of the rotation fixing portion 56c1 of the second mounting shaft portion 56c protrudes from the outer frame portion 57a of the cover body 57, and an operation portion 56c2 is provided at the lower end thereof. The operation part 56c2 protrudes outside from the outer frame part 57a, so that it is easy for the operator to operate.

  The protruding portion 56A is formed between the first mounting shaft portion 56b and the second mounting shaft portion 56c as a substantially U-shaped protruding shape in the approximate center in the height direction Z. On the projecting end side of the projecting portion 56A, a pressing portion 56a having a linear shape along the height direction Z is formed. By providing the pressing portion 56a on the protruding portion 56A, the left and right directions X and the front and rear directions from the first and second mounting shaft portions 56b and 56c while the pressing portion 56a is centered on the rotation axis A3 of the pressing piece portion 56. It can be rotated at a position separated by Y. Therefore, the first wing body 53 can be pressed by the pressing piece portion 56 alone without attaching another member to the pressing piece portion 56. In the second embodiment, the protruding portion 56A is substantially U-shaped, but the present invention is not limited to this. For example, it may be substantially U-shaped or substantially V-shaped.

  The longer the pressing portion 56a is provided in the height direction Z, the wider the area of contact with the blade piece 53c and the holding portion 53d. Therefore, since the pressure can be dispersed over a wide area, the pressing portion 56a can smoothly press the first wing body 53.

  The rotation axis A3 of the pressing piece portion 56 is disposed on an axis connecting the rotation fixing portion 56b1 and the rotation fixing portion 56c1. The rotation axis A3 of the pressing piece 56 and the rotation axis A1 of the first wing body 53 are provided at different positions in the left-right direction X and the front-rear direction Y. In particular, in the second embodiment, the rotation axis A3 of the pressing piece 56 is on the indoor side in the front-rear direction Y than the rotation axis A1 of the first wing body 53, and the outer peripheral side of the insertion tube 52 in the left-right direction X. Is arranged.

[Explanation of operation method when opening the ventilation register from the closed state to the open state]
First, the operation of opening the air passage R will be described with reference to FIG. For the ventilation register 51 in the closed state in which the first wing body 53 and the second wing body 54 close the ventilation path R, the operation portion 56c2 is rotated in the opening direction (arrow P1). By doing so, the pressing piece 56 rotates in the opening direction, and the pressing piece 56a presses the blade piece 53c of the first wing body 53 in the closed state toward the outdoor side (arrow P2). When the first wing body 53 rotates about the rotation axis A1, the outer peripheral side portion 53A of the first wing body 53 enters the insertion tube 52, and the central side portion 53B enters the indoor side. However, since the length in the left-right direction X of the center side portion 53B is formed shorter than the length in the left-right direction X of the outer peripheral side portion 53A, the amount of protrusion to the indoor side is short. Thus, the first wing body 53 is opened.

  As described above, the rotation axis A1 of the first wing body 53 and the rotation axis A3 of the pressing piece 56 are arranged at different positions in the left-right direction X and the front-rear direction Y. Therefore, as the pressing piece portion 56 and the first wing body 53 rotate, the pressing portion 56 a of the pressing piece portion 56 from the outer peripheral side of the insertion tube 52 in the left-right direction X with respect to the first wing body 53. The position is shifted toward the center. However, since the holding portion 53 d is formed long along the left-right direction X and the movable gap 53 e is also formed long along the left-right direction X, the pressing portion 56 a is positioned with respect to the first wing body 53. Even if it deviates, the position deviation can be allowed and the pressing portion 56a can be held.

  The connecting piece 55 is pressed and rotated by the first wing body 53, and the first shaft support 55a moves to the outdoor side (arrow P3). At the same time, the second shaft support portion 55b moves to the indoor side and pulls the center side portion 54B of the second wing body 54 toward the indoor side (arrow P4). As a result, the outer peripheral side portion 54A of the second wing body 54 rotates toward the outdoor side, and the second wing body 54 enters an open state (arrow P5). Since the length in the left-right direction X of the center side portion 54B is formed shorter than the length in the left-right direction X of the outer peripheral side portion 54A in the same manner as the first wing body 53, the amount of protrusion to the indoor side becomes shorter. ing. Therefore, in the open state, the first wing body 53 and the second wing body 54 can be provided with a ventilation register 51 that has a short protruding amount to the room side and does not impair the aesthetics of the room.

  As described above, the holding portion 53d is formed with the first protrusion 53d1 that protrudes into the movable gap 53e. When the operation portion 56c2 is moved from the closed state to the open state, the pressing portion 56a that has moved the movable gap 53e can be fixed at a position over the first protrusion 53d1. Since the pressing piece portion 56 is fixed in the open position in this way, the first wing body 53, the connecting piece portion 55, and the second wing body 54 are similarly maintained in the open state. Further, since the operator can obtain a click feeling at the hand when the pressing portion 56a moved through the movable gap 53e gets over the first protrusion 53d1, the operator feels that such fixing has been ensured. Can be confirmed.

  As described above, the pressing piece portion 56, the first wing body 53, the connecting piece portion 55, and the second wing body 54 are displaced substantially simultaneously. Therefore, the first wing body 53 and the second wing body 54 can be easily opened like a double door by simply operating the operation portion 56c2. Since the ventilation path R is opened in such an open state, ventilation can be performed sufficiently.

[Explanation of operation method when changing the ventilation register from the open state to the closed state]
Next, the operation of closing the air passage R will be described with reference to FIG. For the ventilation register 51 in the open state in which the first wing body 53 and the second wing body 54 open the ventilation path R, the operation portion 56c2 is rotated in the closing direction (arrow C1). By doing so, the pressing piece portion 56 rotates in the closing direction, and the pressing portion 56a is pressed so as to pull the holding portion 53d of the first wing body 53 in the open state in the closing direction. As a result, when the first wing body 53 rotates about the rotation axis A1, the outer peripheral side portion 53A of the first wing body 53 moves to the indoor side (arrow C2), and the central side portion 53B has a difference. Move to the insertion tube 52 side. Thus, the first wing body 53 is closed.

  When operating from the open state to the closed state, contrary to operating from the closed state to the open state, the pressing piece 56 and the first wing body 53 rotate, so the pressing part 56a of the pressing piece 56 is The first wing body 53 is displaced in the left-right direction X from the center side of the insertion tube 52 toward the outer peripheral side. However, it is possible for the holding portion 53d to allow the displacement and continue to hold the pressing portion 56a.

  The connecting piece 55 is pulled and rotated by the first wing body 53, and the first shaft support portion 55a moves to the indoor side (arrow C3). At the same time, the second shaft support portion 55b moves toward the outdoor side (arrow C4), and the central side portion 54B of the second wing body 54 rotates toward the outdoor side to be in a closed state ( Arrow C5).

  As described above, the holding portion 53d is formed with the second protrusion 53d2 that protrudes into the movable gap 53e. When the operation portion 56c2 is moved from the open state to the closed state, the pressing portion 56a that has moved the movable gap 53e can be fixed at a position over the second protrusion 53d2. Since the pressing piece portion 56 is fixed in the closed position in this way, the first wing body 53, the connecting piece portion 55, and the second wing body 54 are similarly maintained in the closed state. Similarly to the case of changing from the closed state to the open state, the operator can obtain a click feeling when the pressing portion 56a that has moved through the movable gap 53e gets over the second protrusion 53d2, It can be confirmed with the sense of hand that such fixation has been made securely.

  In this state, since the end face 53f of the first wing body 53 and the end face 54c of the second wing body 54 face each other and close the plug cylinder 52, the ventilation path R is closed. Thus, entry of dust, raindrops, and the like from the outside can be suppressed.

  As described above, the pressing piece portion 56 includes the first mounting shaft portion 56b, the second mounting shaft portion 56c, and the protruding portion 56A having the pressing portion 56a. Such a pressing portion 56a directly presses the first wing body 53, so that the pressing piece portion 56 is compared with the case where another member is interposed or the pressing piece portion 56 is constituted by a plurality of members. The turning force can be easily transmitted as the turning force of the first wing body 53. Therefore, the ventilation register 51 can be easily operated by the operator.

  Moreover, compared with the case where the press piece part 56 which consists of such a some member is provided, a number of parts can be decreased. Therefore, the ventilation register 51 can be manufactured easily and at a low cost. In the preferred embodiment, the pressing piece portion 56 has an integral structure, but it is obvious that the pressing piece portion 56 of the present invention may be composed of a plurality of members.

Variations:
In the second embodiment, the example in which the first attachment shaft portion 56b and the second attachment shaft portion 56c have substantially the same length, and the pressing portion 56a is provided at substantially the center in the height direction Z is shown. On the other hand, either one of the attachment shaft portions 56b and 56c may be provided longer than the other, and the pressing portion 56a may be provided so as to be biased to either the upper side or the lower side.

  In the said 2nd Embodiment, the press part 56a showed the example which has 56 A of protrusion parts which protrude in a U shape. On the other hand, you may provide the protrusion part which becomes the shape which protrudes in a mountain shape, for example. In this case, it is preferable to make the mountain-shaped tip portion straight so that the pressing portion 56a can smoothly displace the movable gap 53e of the holding portion 53d of the first wing body 53. By doing so, it is possible to suppress a situation in which the tip of the protruding portion 56A is stuck into the holding portion 53d or the blade piece 53c and cannot move inside the movable gap 53e.

  In the second embodiment, the first mounting shaft portion 56 b and the second mounting shaft portion 56 c of the pressing piece portion 56 are pivotally supported with respect to the outer frame portion 57 a of the cover body 57. Indicated. On the other hand, the place where the pressing piece portion 56 is pivotally supported is not limited to the outer frame portion 57a. For example, the first attachment shaft portion 56b is located above the insertion tube 52 in the cover body 57 or the insertion tube 52. It is good also as what is pivotally supported with respect to the upper side of the indoor side opening part 52a in. Thereby, since the press piece part 56 can be reduced in size, material cost can be made cheap.

(Third embodiment)
In the present embodiment, the nanofilter is attached to a ventilation register having a known configuration, not limited to the ventilation register of the first embodiment or the second embodiment. The ventilation register of the present invention is characterized in that it includes a nano filter, and any known structure can be used for the ventilation register itself. Although a third embodiment will be described below with reference to the drawings, it should be understood that the present invention is not limited to the specific structure of the ventilation register. For example, the present invention can also be applied to a structure in which a tubular pleated filter is inserted into an insertion tube, such as the ventilation register of the first embodiment or the second embodiment. FIG. 20 shows a view in which a nanofilter is mounted on a known general ventilation register except that a back space is provided.

  Since the nanofilter has fine fibers, it looks like paper, and even if the filter medium is actually placed flat on the ventilation register, the pressure loss may be large. Thus, in a preferred embodiment, the nanofilter can be pleated. Although the shape and size of the pleats are not particularly limited, for example, the height of the pleats is about 5 to about 40 mm, preferably about 10 to about 30 mm, more preferably about 15 to about 25 mm (for example, 15 mm, 25 mm). Etc.). The pitch of the pleats is not particularly limited, but may be, for example, about 3 to about 10 mm (specifically, 8 mm, 6 mm, 4 mm, etc.). The pleating process to the nanofilter can be formed by pleating a flat filter medium with a known pleating machine (rotary pleating machine, reciprocating pleating machine, creasing pleating machine, etc.).

  In addition to or instead of pleating the nanofilter, a backspace can be provided in the ventilation register of the present invention. As illustrated in FIG. 20, the back space is a space between the holding unit and the prefilter. The pre-filter is a filter (for example, a filter PS-150 manufactured by Japan Vilene Co., Ltd.) through which the gas supplied through the ventilation register passes before passing through the nano filter. It is used to capture in advance particles having a particle size of about 5 μm or larger, which is larger than the particle size to be collected.

  By providing the back space, for example, the pressure loss can be improved because air that has passed through the insertion tube can pass through the entire surface of the prefilter having a cross-sectional area larger than the cross-sectional area of the insertion tube (see FIG. 20). The distance between the plug-in tube and the prefilter in the back space can be any distance as long as the pressure loss can be improved. Those skilled in the art will recognize the difference in backspace so that air that has passed through a plug section having a circular cross section can pass through a wider surface of a prefilter having a square cross section that is a larger cross-sectional area than the circular section of the plug section. The distance between the barrel and the prefilter can be appropriately determined. For example, the distance between the plug-in tube and the prefilter may be about 5 mm or more, but the present invention is not limited to this. In addition, the space | interval between an insertion cylinder and a pre filter means the distance between the exit of an insertion cylinder, and a pre filter.

  When there is no backspace, the air passing through the insertion tube passes through the prefilter and the nanofilter as they are, so that ventilation is performed only in an area corresponding to the cross-sectional area of the insertion tube of the nanofilter. As a result, in the ventilation register without a back space, collection marks were formed on the nanofilter with an area and shape corresponding to the cross section of the plug-in cylinder (not shown). On the other hand, by providing the back space, the air passing through the insertion tube passes through the entire surface of the filter, and as a result, the collection efficiency and the pressure loss are improved. Moreover, since the collection area of a filter spreads from the part corresponding to a cross section of an insertion cylinder to the whole, it is thought that the duration of collection performance is also extended.

  In one embodiment, the ventilation register of the present invention collects 40% or more of fine particles having a particle size of 0.3 μm to 0.5 μm with respect to an air flow having a linear velocity of 2.5 cm / s in the ventilation port, preferably 60% or more can be collected, and more preferably 70% or more can be collected. Or the ventilation register | resistor of this invention is 40-90%, 60-90%, 70-70 microparticles | fine-particles with a particle size of 0.3 micrometer-0.5 micrometer with respect to the air current of 2.5 cm / s of linear velocity in a ventilation port. 90%, 40-80%, 60-80%, or 70-80% may be collected.

  In one embodiment, the ventilation register of the present invention collects 70% or more of fine particles having a particle diameter of 0.5 to 1 μm, preferably 75%, with respect to an air flow having a linear velocity of 2.5 m / sec in the ventilation port. More than 80% is collected, more preferably 80% or more, and particularly preferably 85% or more. Or the ventilation register | resistor of this invention is 70-95%, 80-95%, 85-95% for the microparticles | fine-particle diameter of 0.5-1 micrometer with respect to the air current of the linear velocity 2.5m / sec in a ventilation port. 70-90%, 80-90%, or 85-90%.

  In one embodiment, the ventilation register of the present invention collects 85% or more, preferably 90% or more, of fine particles having a particle diameter of 1 to 2 μm with respect to an air flow having a linear velocity of 2.5 m / sec in the ventilation port. More preferably 93% or more.

  In one embodiment, the ventilation register of the present invention collects 95% or more, preferably 98% or more, of fine particles having a particle diameter of 2 to 5 μm with respect to an air flow having a linear velocity of 2.5 m / sec in the ventilation port. You can collect.

  In one embodiment, the ventilation register of the present invention can collect almost 100% of fine particles having a particle size of 5 μm or more with respect to an air flow having a linear velocity of 2.5 cm / sec in the ventilation port.

  In one embodiment, the ventilation resistor of the present invention may have a vent diameter of 100 mm and a pressure loss factor of 180 or less. In a preferred embodiment, the ventilation resistor of the present invention may have a vent diameter of 100 mm and a pressure loss coefficient of 120 or less. In a further preferred embodiment, the ventilation resistor of the present invention may have a ventilation port diameter of 100 mm and a pressure loss coefficient of 80 or less. In a particularly preferred embodiment, the ventilation resistor of the present invention may have a vent diameter of 100 mm and a pressure loss factor of 50 or less.

  In one embodiment, the ventilation resistor of the present invention may have a vent diameter of 150 mm and a pressure loss factor of 120 or less. In a preferred embodiment, the ventilation resistor of the present invention may have a vent diameter of 150 mm and a pressure loss coefficient of 80 or less. In a further preferred embodiment, the ventilation resistor of the present invention may have a ventilation port diameter of 150 mm and a pressure loss coefficient of 60 or less. In a particularly preferred embodiment, the ventilation resistor of the present invention may have a vent diameter of 150 mm and a pressure loss factor of 45 or less.

  In the ventilation register of the present invention, the cross-sectional area of the nanofilter set in the housing may be about 2.0 to about 2.7 times the cross-sectional area of the ventilation port. The “cross-sectional area of the nanofilter” is not the development area of the pleated nanofilter but the cross-sectional area of the housing in which the nanofilter is set.

  In one embodiment, as shown in FIG. 21, a filter system (lid) including a nanofilter and a prefilter may be provided by being attached to cover an existing indoor register. Thereby, a high performance filter can be easily attached to many existing buildings. In this case, the cross-sectional area of the nanofilter set in the housing may be about 3.0 times to about 5.0 times the cross-sectional area of the ventilation port. In addition, the back space in such a filter system means the space from the insertion tube of the existing indoor register to the pre-filter of the filter system, as shown in FIG. The back space of the filter system can be about 20 to about 60 mm, preferably about 30 to about 40 mm.

(Other embodiments)
The present invention has been described with reference to the preferred embodiments for easy understanding. Hereinafter, the present invention will be described based on examples. However, the above description and the following examples are provided only for the purpose of illustration and are not intended to limit the present invention. Accordingly, the scope of the present invention is not limited to the embodiments or examples specifically described in the present specification, but is limited only by the scope of the claims.

(Example 1: Examination of pressure loss of ventilation register using nanofiber)
As a commonly used ventilation register, a conventional air supply register equipped with an electrostatic filter and an air supply register equipped with each of the two types of nanofiber filters of the present invention are set in a pressure loss measuring machine. Was measured. The pressure loss is measured based on the measurement method described in Appendix 1 of JIS C9603 (ventilation fan). As shown in FIG. 25, the pressure loss measuring machine connects a measurement port (duct) and a ventilation register to be measured so that there is no air leakage. The diameter of the duct, which is the measurement port connected to the ventilation register, is the same as the size of the ventilation port to which the ventilation register is actually mounted. In this measurement, the diameter of the duct serving as a measurement port is φ100 mm (100 pie). An appropriate orifice is selected according to the air volume. The rectifying network and the wind expansion plate are installed in order to make the wind speed in the air tank uniform. The air volume is adjusted by the power controller. At the time of measurement, after adjusting the static pressure of the air tank to be equal to the static pressure at the time of measuring the air volume of the ventilation register (static pressure becomes 0), the recorder (for example, Okano Manufacturing Co., Ltd.) The differential pressure between the air tank and the measurement pipe is read with a manometer).

  In actual measurement, first, an air flow-static pressure curve is obtained in a state (state 1) in which the ventilation register to be measured is connected to the measurement port. Next, an air volume-static pressure curve in a state where the ventilation register is removed from the measurement port (state 2) is obtained. Then, a pressure loss curve is calculated from the difference between the air volume-static pressure curve in state 1 and the air volume-static pressure curve in state 2. In the measurement, the static pressure is measured up to 100 Pa. In the present specification, the pressure loss coefficient ζ is calculated by the following equation.

ζ = δP × ((4.03 × duct cross-sectional area) / air volume)) ^ 2
δP is a differential pressure recorded by a recorder.
The result is shown in FIG.

  About the conventional electrostatic filter, it set with respect to two different types of housing designs, and measured the pressure loss (A and B of FIG. 22). Although it is the same electrostatic filter, it can be seen that the pressure loss of B is smaller than that of A due to the difference in housing design (ie, B is more than A when, for example, the same static pressure of 100 Pa is applied). Large amount of permeated gas).

  Two types of nanofilters were set in the same casing as the casing design (B in FIG. 22) with little pressure loss. C1, C2, and C3 in FIG. 22 are about 8 mm (C1), about 6 mm (C2), and a pleat mountain pitch for a nanofilter (Nitto Denko Corporation, Osaka, Japan) having a fiber diameter of about 125 nm and a pore diameter of about 10 μm. About 4 mm (C3). D1, D2 and D3 in FIG. 22 are about 8 mm (D1), about 6 mm (D2), and about 6 mm (D2), with a pleated mountain pitch for a nanofilter (Nitto Denko Corporation, Osaka, Japan) having a fiber diameter of about 60 nm and a pore diameter of about 5 μm. About 4 mm (D3). The peak height of the pleats is about 15 mm for D1, D2 and D3.

  It should be noted that there is a large difference in collection efficiency between the A and B ventilation registers and the C1-C3 and D1-D3 ventilation registers. That is, the ventilation resistors of A and B had a maximum collection efficiency of 46.3% for particles having a particle size of 0.5 to 1.0 μm, whereas the ventilation resistors of C1 to C3 and D1 to D3 Further, the collection efficiency was remarkably superior to that. For example, even when the collection efficiency of particles having a particle diameter of 0.3 μm was exceeded, both exceeded 70%. In C1 to C3 (fiber diameter of about 125 nm and pore diameter of about 10 μm) and D1 to D3 (fiber diameter of about 60 nm and pore diameter of about 5 μm), D1 to D3 were superior in collection efficiency.

  Nevertheless, the pressure loss of B and the pressure loss of C1 and D1 did not change much, and the pressure loss of C2, C3, D2 and D3 even exceeded the pressure loss of B. That is, the pressure loss coefficient of the conventional product A was 178.8 and the pressure loss coefficient of B was 45.55, whereas the pressure loss coefficient was 54.5 for C1, and 37.39 for C2. , C3 was 29.98, D1 was 42.76, D2 was 34.9, and D3 was 26.12.

  These results are extremely unexpected in the field, and the data in FIG. 22 clarify the feasibility of applying the nanofilter to the ventilation register, which is considered to be unusable for a natural air supply ventilation register. did. Significantly, this trend was consistently shown at any airflow, without changing with airflow. This also proved the possibility of applying the nanofilter to the ventilation register of Type 3 ventilation system, which is required to cope with a wide range of air flow.

  In addition, it should be noted that the tendency to improve pressure loss by reducing the pleat pitch to about 8 mm, about 6 mm, and about 4 mm was consistently observed.

(Example 2: Examination of pressure loss and collection efficiency between nanofilter and other filters)
About the nanofilter having a fiber diameter of about 60 nm and a pore diameter of about 5 μm used in Example 1, a pleat pitch of about 4 mm and a peak height of about 15 mm, and a conventional electrostatic filter (pleated processing) set in the same housing Unprocessed) and microfilters (Panasonic Ecosystems Bentech Co., Ltd. filter VB-YA100PM: fiber diameter of about 15 μm to about 46 μm) that were radially pleated were confirmed to show time-series changes in pressure loss and collection efficiency. did.

  23A is a nanofilter ventilation register of the present invention (A1 is an initial value, A2 is after 40 hours), B is a conventional microfilter (B1 is an initial value, B2 is after 30 hours), and C is It is a conventional electrostatic filter (C1 is an initial value, and C2 is after 30 hours). FIG. 23A shows a time-series change in pressure loss, and FIG. 23B shows a comparison of collection efficiency.

  The pressure loss is a digital manometer (manometer (F-213) manufactured by Tsukubarika Seiki Co., Ltd.), which is the differential pressure upstream and downstream of the filter when air is passed through the filter unit, which is the measurement object, at an air volume of 2.5 m / sec. ).

  In the nano-filter ventilation register of the present invention, the collection efficiency of 0.3 to 0.5 μm dust exceeds 70%, and a gentle curve is drawn even when the time course of pressure loss is seen. It has been found that it can withstand use. The microfilter had a larger pressure loss than the electrostatic filter and was not suitable for the ventilation register of the natural air inlet.

  Note that the initial value (B1) of the microfilter is considered to have leaked from between the housing and the filter. And it is thought that the particle | grains etc. adhere to a microfiber fiber with progress of time, the leak between microfiber fibers was improved, and the collection efficiency improved. The microfilter is considered to have a short life because clogging due to particles adhering to the microfiber fiber with time progresses faster than other filters.

(Example 3: Examination of mountain height)
As a result of the research and development by the present inventors, it has been found that pleating conditions are important for improving the pressure loss of the nanofilter.

  In this example, pressure loss was measured using a nanofilter having a pitch of about 4 mm and a peak height of about 15 mm and a nanofilter having a pitch of about 4 mm and a peak height of about 25 mm.

  The results are shown in FIG. A represents a ventilation register having a pitch of about 4 mm, a mountain height of about 15 mm, and a back space of about 5 mm, and B represents a ventilation register having a pitch of about 4 mm, a mountain height of about 25 mm, and a back space of about 5 mm.

  As can be seen from the results of A and B, it was found that the larger the peak height, the larger the developed area of the nanofilter and the better the pressure loss.

(Example 4: durability)
A nanofilter having a fiber diameter of about 60 nm and a pore diameter of about 5 μm was actually attached to the inventor's home and used for one month to measure pressure loss. As a result, it was found that the air flow rate was reduced by about 6% due to clogging.

  When the nanofilter was washed with water and the pressure loss was measured again, it almost returned to the initial value.

DESCRIPTION OF SYMBOLS 1 Ventilation register 2 Ventilation port 3 Insertion tube 3a Indoor side opening end 3b Outdoor side opening end 3c Ventilation chamber 4 Face part 5 Inner wall 6 Outward flange 6a Outer frame part 7 Flat part 7a Knob part 7b Rectification dome part 8 Cylindrical pleats Filter part 8a Pleated part 8b Indoor side opening end 8c Outdoor side opening end 9 Holding part 9a Sealing part 10a Sealing part 10b Sealing part 11 Ventilation gap part 11a Air 12 Supporting part 13 Prefilter 14 Ventilation register (Modification)
15 Ventilation register (modification)
S Screwing portion 51 Ventilation register 51A Open / close structure 52 Plug-in tube 52a Indoor side opening portion 53 First wing body 53A Outer peripheral side portion 53B Center side portion 53a Fixed portion 53b Fixed portion 53c Wing piece 53d Holding portion 53d1 First protrusion Part 53d2 second protrusion 53e movable gap 53f end face 54 second wing body 54A outer peripheral side part 54B central side part

Claims (25)

A ventilation register used in a natural air inlet,
An insertion tube that is inserted into the ventilation opening of the building and attached;
A prefilter through which the gas that has passed through the insertion tube passes,
A ventilation resistor comprising a nanofilter filter medium through which the gas that has passed through the prefilter passes. The ventilation resistor of claim 1, wherein the nanofilter has a fiber diameter of about 1 to about 250 nm and a pore diameter of about 5 to 10 μm. The ventilation resistor of claim 2, wherein the nanofilter has a pleat with a pitch of about 3 to about 10 mm and a ridge height of about 5 to about 40 mm. The ventilation register of any one of Claims 1-3 which has a back space between the said pre filter and the said insertion cylinder. The ventilation register of claim 4, wherein the backspace is about 5 mm or more. The nano filter collects about 70% or more of fine particles having a particle diameter of 0.5 to 1 μm with respect to an air flow having a linear velocity of 2.5 m / sec in the ventilation port. Ventilation register as described in section. The ventilation register according to claim 6, wherein the ventilation register is for a vent having a diameter of 100 mm, and the pressure loss coefficient of the ventilation register is 180 or less. The ventilation resistor according to claim 7, wherein the ventilation resistor has a pressure loss coefficient of 80 or less. The ventilation register according to claim 6, wherein the ventilation register is for a vent having a diameter of 150 mm, and the pressure loss coefficient of the ventilation register is 120 or less. The ventilation register according to claim 9, wherein a pressure loss coefficient of the ventilation register is 60 or less. The ventilation register according to any one of claims 7 to 10, wherein a cross-sectional area of the nanofilter is about 2.0 to about 2.7 times a cross-sectional area of the ventilation port. A filter system for attaching to a ventilation register used in a natural air inlet, wherein the filter system includes a filter medium and a pre-filter, and the filter of the filter medium is a nanofilter;
The nanofilter is
Having a fiber diameter of about 1 to about 250 nm and a pore diameter of about 5 to 10 μm;
Having a pitch of about 3 to about 10 mm, and a pleat of a height of about 5 to about 40 mm;
The filter system is
A filter system that collects approximately 70% or more of fine particles having a particle diameter of 0.5 to 1 μm with respect to an air flow having a linear velocity of 2.5 m / sec in a ventilation port. An insertion tube that is inserted into the ventilation opening of the building and attached;
A face part capable of moving forward and backward with respect to the opening on the indoor side of the insertion tube,
A ventilation register comprising a cylindrical pleat filter having a plurality of pleat portions arranged in parallel along a circumferential direction,
The ventilation register according to claim 1, wherein an opening end on one side of the cylindrical pleated filter is attached to a back surface of the face portion. The ventilation register according to claim 13, wherein the face portion includes a holding portion that holds the cylindrical pleated filter so as to be slidable with respect to the insertion tube. The ventilation register according to claim 14, further comprising a ventilation gap portion through which air that has passed through the cylindrical pleated filter passes between the cylindrical pleated filter held by the holding portion and an inner peripheral surface of the insertion tube. . The ventilation register according to claim 14 or 15, wherein the holding part includes a sealing part between the holding part and the cylindrical part of the plug-in cylinder. The ventilation register according to any one of claims 13 to 16, wherein the cylindrical pleated filter has a tapered shape from an outdoor side toward an indoor side. The ventilation register according to any one of claims 13 to 17, wherein the face portion has a rectifying dome portion formed in a conical shape projecting toward an opening portion on an outdoor side of the insertion tube on a back surface. The ventilation according to any one of claims 13 to 18, wherein the face portion includes a seal portion that fixes the tubular pleated filter and seals a gap between the face pleated filter. register. A plug-in tube installed in the ventilation opening of the building;
A cover body provided on the indoor side of the insertion tube;
A first wing body and a second wing body, which are attached to an air passage inside the plug-in cylinder, wherein the first wing body and the second wing body are rotated inside the plug-in cylinder. A first wing body and a second wing body which are pivotally supported and open and close the air passage by rotating each wing body;
A rotatable mounting shaft portion to be mounted on the plug-in cylinder or the cover body;
A pressing portion held by the first wing body so as to be displaceable in a radial direction of the insertion tube along a plate surface of the rotating first wing body at a position away from the mounting shaft portion; A pressing piece having
A ventilation register comprising: a connecting piece portion that allows one end side to be pivotally supported by the first wing body and the other end side to be pivotally supported by the second wing body so that the wing bodies can be linked to each other.   The first wing body is rotated by being pressed by the pressing portion, the connecting piece portion is interlocked with the rotation of the first wing body, and the second wing body is interlocked with the connecting piece portion. The first wing body and the second wing body are rotated in an opening direction or a closing direction to open and close a ventilation port by rotating in the manner described above. Ventilation register. The pressing piece portion is disposed between the first mounting shaft portion as the mounting shaft portion, the second mounting shaft portion, and the first mounting shaft portion and the second mounting shaft portion. A protruding portion that protrudes in a direction intersecting the axial direction of the pressing piece portion,
The first mounting shaft portion and the second mounting shaft portion are disposed on the rotation shaft of the pressing piece portion,
The ventilation register according to claim 20 or 21, wherein the pressing portion is disposed on a protruding end side of the protruding portion.   The ventilation register according to any one of claims 20 to 22, wherein the pressing portion and the attachment shaft portion are formed of a single member. The said 1st wing | blade body has a holding | maintenance part which hold | maintains a wing piece and the press part of the said press piece part so that a movement is possible between this wing piece. Ventilation register as described in. The ventilation register according to any one of claims 20 to 24, wherein the pressing piece portion includes an operation portion protruding from the cover body.