JP2007218549A - Ventilation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure waterproofing performance regardless of the diameter of a ventilation port or a water gradient, in attaching a ventilation device to a ventilation port provided on an outer wall of a building. <P>SOLUTION: The ventilation device A comprises a first member 1 having a disk part 1a and a louver 1d provided in a central through-hole 1c, and a second member 2 having a cylindrical body part 2a, a collar part 2b provided on one open end of the body part 2a and having a diameter smaller than the diameter of the disk part 1a of the first member and larger than the diameter of the through hole and a predetermined thickness, and a flashing part 2c provided on the other open end side of the body part 2a or within the body part. The first member 1 is arranged on the end surface of the collar part 2b of the second member 2 so that the louver 1d connects with one open end of the second member 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a ventilator that is attached to a vent opening formed in an outer wall and ventilates a vent layer formed on the indoor side along the outer wall and the outside air.

  In buildings, ventilating openings are made in the outer wall for the purpose of ventilating the room or ventilating the wall between the outer wall and the inner wall. In order to prevent intrusion of rainwater into the room or wall, it is common to install a device called a bend cap, weather cover, or the like provided with a louver. However, the waterproof performance is insufficient with only the louver, and there is a risk that rainwater may enter the room or the wall in the event of a storm.

  In order to solve the above problem, a ventilator described in Patent Document 1 has been proposed. This ventilation device is inserted and fixed in a ventilation hole opened in the outer wall, and is formed in a cylindrical shape with the outer end opened inside the gallery and the inner end closed, and has a ventilation window hole on the upper side. In addition, a water return plate is provided between the ventilation window hole and the opening. After this ventilation device is attached to the ventilation hole, a louver plate is attached to cover the opening side. With this ventilator, even when wind and rain are blown from diagonally below, it is possible to repel rainwater with a water return plate and take only the wind indoors.

  In the above ventilator, when the ventilator is inserted and fixed in the ventilating hole, mortar is filled between the inner peripheral surface of the ventilating hole and the outer peripheral surface of the cylindrical part, or provided on the outer peripheral surface of the cylindrical part. The plate spring is brought into contact with the inner peripheral surface of the ventilation hole to apply a spring force or to be bonded using an adhesive.

JP 2001-021188 A

  Even the technique described in Patent Document 1 is not completely free of problems, but has some problems to be solved. For example, in this technique, there is no special member for exerting the waterproof performance between the ventilation device and the ventilation hole, and mortar or adhesive is used. However, it is difficult to fill mortar or adhesive without a gap between the inner peripheral surface of the ventilation hole having a large gap and the outer peripheral surface of the cylindrical portion. In particular, there is a problem that reliability cannot be ensured because there is no way to confirm whether or not mortar or adhesive is filled without any gap between them.

  Further, if the outer diameter of the cylindrical portion of the ventilator is not compatible with the inner diameter of the ventilation hole, the fixing is likely to be insufficient, and there is a possibility that stable fixing cannot be realized. For this reason, it is necessary to prepare a plurality of types of ventilation equipment corresponding to the inner diameter of the ventilation hole. In particular, when replacing existing ventilation equipment during renovation of an existing building, considering the effects on other parts and the effort, the diameter of the vent hole already opened corresponds to the diameter of the ventilation equipment. The refurbishr must stock several types of ventilators to accommodate the inner diameter of the existing vents.

  When renovating an existing building, some of the ventilation holes formed in this building have a water gradient toward the outside of the building in order to prevent rainwater from entering the building. In this case, there is a possibility that it is difficult to cope with the ventilator.

  An object of the present invention is to provide a ventilator that can reliably ensure waterproof performance by a simple operation regardless of the diameter of a vent opening and the presence or absence of a water gradient.

  In order to solve the above problems, a first ventilator according to the present invention is a ventilator that is attached to a circular vent opening formed in an outer wall and ventilates while preventing intrusion of rainwater. A first water stop member provided with a louver in the through hole, a cylindrical body portion having an outer diameter corresponding to the diameter of the through hole of the first water stop member, and one open end of the body portion A flange having a diameter smaller than the diameter of the disk of the first water stop member and larger than the diameters of the through hole and the ventilation opening and a predetermined thickness, and the other open end side of the trunk Or a second water stop member having a water return portion provided inside the trunk portion, and the first water stop member is disposed on an end surface of the flange portion of the second water stop member. It arrange | positions and integrates so that the louver provided in the 1st water stop member and the one open end of the said 2nd water stop member may connect.

  The second ventilator of the present invention is the first ventilator described above, wherein the outer wall of the body of the second water-stopping member has elasticity and heat insulation and is perforated in the outer wall in a free state. A holding member having an outer diameter larger than the diameter of the ventilation port is attached.

  According to a third ventilator of the present invention, in the first or second ventilator, a throttling portion is formed on the other open end side of the trunk portion of the second water-stopping member. The diameter of the throttle part is configured to be smaller than the diameter of one open end side of the part.

  In the first ventilator according to the present invention, one open end of the body portion of the second water stop member has a diameter smaller than the diameter of the disk of the first water stop member and larger than the diameter of the vent hole. In addition, since the flange portion having a predetermined thickness is provided, when the ventilation device is configured by connecting the first water stop member to the end surface of the flange portion and integrating the first water stop member, The collar part of the 2nd water stop member will be continuously arrange | positioned at a disk. For this reason, when the body part of the second water stop member is inserted into the ventilation port provided on the outer wall, the ventilation device is attached, and the buttocks are brought into contact with the outer surface of the outer wall, the outer surface of the outer wall and the disc A gap for filling a wet sealing material (hereinafter simply referred to as “sealing material”) corresponding to the thickness of the collar portion is formed. Therefore, the sealing material filled in the gap has a width and thickness necessary for watertightness, and it is possible to reliably block a gap between the ventilator and the vent that may enter rainwater.

  In particular, since the gap filling the sealing material becomes the outer surface side of the outer wall and one surface of the filling part is opened, the degree of filling of the sealing material can be confirmed by visual observation, or deterioration of the sealing material after aging by visual inspection or pressing. (Hardening) It is possible to check the situation, and most of the sealing material is covered with a disk, and the excess sealing material can be uniformly wiped with a spatula etc. using the edge of the disk as a ruler. Can be finished beautifully.

  Further, in the second ventilator of the present invention, a holding member having elasticity and heat insulation is provided on the outer wall in a free state on the outer periphery of the trunk portion of the second water stop member constituting the ventilator. Since it is installed so that it is larger than the diameter of the ventilation port, the holding member is compressed when the ventilation device is inserted into the ventilation port, and the elasticity of the holding member acts when inserted to a predetermined position. The mounting position of the ventilator can be maintained.

  In particular, even if the diameter of the ventilation port varies depending on the building, it can be handled with a single ventilator as long as it is in the range of the inner diameter that can be absorbed by the elasticity of the holding member. Even in the case where the mouth has a water gradient, the holding member is deformed according to the water gradient, so that the entire collar portion can be in contact with the outer surface of the outer wall to maintain a close contact state. For this reason, even in the case of renovation work, the refurbishr does not need to stock many types of ventilation equipment.

  Furthermore, since the holding member has heat insulation properties, even if the difference between the outer diameter of the trunk of the ventilator and the diameter of the vent is large, the inflow and outflow of heat in the ventilator part is kept to a minimum. Can do.

  In the third ventilator of the present invention, since the throttle portion is formed on the other open end side of the body portion of the second water blocking member, there are obstacles (reinforcing bars for concrete panels) inside the outer wall material or inside the building. Or existing equipment piping, etc.) can be prevented from interfering with each other. Therefore, from the desired position (for example, the same position in the horizontal direction on each floor, the same position in the vertical direction on the same floor, the center of the outer wall panel, etc., the position where you want to attach here aesthetically) due to the presence of the obstacle It is easy to avoid that the ventilator must be attached with a shift, and the degree of deterioration in the exterior design of the building due to the ventilator attachment can be suppressed.

  Hereinafter, the most preferable embodiment of the ventilator according to the present invention will be described. The ventilator according to the present invention is attached to a ventilation port formed through the outer wall of a building, and has a function of ventilating the ventilation layer formed between the room or along the outer wall and the outside air. . And even when applied to a new building or an existing building, it is possible to realize reliable waterproofing between the ventilator and the vent.

  In the ventilator of the present invention, even when applied to a new building or an existing building, it is possible to maintain a reliable mounting state with respect to the vent, and the vent formed in the existing building It is possible to cope with even a case having a gradient.

  The ventilation device of the present invention is configured by combining a first water stop member (first member) and a second water stop member (second member). The first member is disposed on the outer surface of the outer wall, is formed in a disk shape, and has a through hole in the center. The second member is arranged in a ventilation port provided on the outer wall, and has a cylindrical body, a flange provided at an open end on one side of the body, and the other open end or the other end. And a water return portion provided inside on the open side. And the ventilation apparatus is comprised by making the collar part of a 2nd member oppose the disk of a 1st member, and integrating.

  The first member is formed in a disk shape, and a through hole is formed in the center thereof so as to penetrate the first member along the axial center. The through hole is provided with a louver. The position where the louver is formed in the through hole is not particularly limited, and may be any position along the axis of the first member. However, since the first member is disposed on the outer surface of the outer wall, the first member is preferably formed on the surface side of the disk as much as possible. In this way, by providing a louver in the through hole, it is possible to prevent the rainwater that enters the first member from entering from the upper side.

  The second member has a cylindrical body portion, and a flange portion is provided at an open end on one side of the body portion, and a water return portion is provided inside the open end or the open end side on the other side. In particular, the trunk has an outer diameter smaller than the inner diameter of the vent because it is inserted into the vent. However, the length of the body portion is not particularly limited, and is preferably set as appropriate according to the thickness of the outer wall.

  The flange of the second member is in contact with the outer surface of the outer wall to determine the position of the second member with respect to the vent and the outer wall of the outer wall when mounted on the vent in a state combined with the first member. It has a function of forming a recess for filling the sealing material together with the surface. For this reason, the diameter of a collar part is set to the dimension smaller than the diameter of the disk of a 1st member, and larger than the diameter of a vent hole. In particular, it is possible to cope with a plurality of vent holes having different diameters by setting the diameter of the collar portion to a size close to the diameter of the disc within a range in which a filling thickness of a predetermined ceiling is ensured.

  The body of the second member is formed in a cylindrical shape. The outer diameter of the trunk is not particularly limited, but is preferably as small as possible to achieve indoor ventilation. By making the outer diameter of the trunk portion smaller, it is possible to apply to a ventilation port having a different diameter.

  The water return portion provided in the second member has a function of preventing water that has entered the inside of the second member through the gall formed in the first member from entering the room or the ventilation layer. is there. The water return part should just be what can exhibit the said function, and does not limit a shape or a composition. There are several shapes and structures as the water return portion having such a function. For example, a plate-like standing member that covers the lower side of the open end portion on the other side of the trunk portion, and the inside of the trunk portion. It can comprise by the combination with the plate-shaped drooping member which closes up. By configuring in this way, the rainwater that blows in from the diagonally below from the bottom when strong winds are prevented from advancing by the standing member and the drooping member, so it prevents the rainwater from entering the building while maintaining the ventilation function be able to.

  The material and manufacturing method of the first member and the second member are not particularly limited. However, it is preferable to manufacture by injection molding with a synthetic resin when considering the molding of the disk portion and the molding of the body and the collar. For example, when a metal plate is press-molded, the cost of the press mold is higher than that of the injection mold, and synthetic resin is advantageous from this point of view.

  A ventilation device configured by combining the first member and the second member is attached in a state where the trunk portion is inserted into a ventilation port formed on the outer wall. For this reason, the means to hold | maintain the attachment state of a ventilator becomes essential. In the present invention, by attaching a holding member having elasticity and heat insulation to the outer periphery of the trunk portion in a free state with a diameter larger than the diameter of the ventilation port, the attachment state of the ventilation device to the ventilation port is maintained. Configure to get.

  The material of the holding member is not particularly limited, and any material having appropriate elasticity and heat insulating properties can be used. However, special foamed polyurethane (for example, “Super Sheet” from Nippon Kijo Co., Ltd.) or EPDM can be used. Sponge-like synthetic resins such as foams are preferable because they have airtightness and watertightness.

  The ventilation device attached to the ventilation port formed on the outer wall is relatively lightweight, and is supported by the sealing material filled in the concave portion as described above, so that a particularly large force does not act on it and a relatively small force. It is possible to hold the mounting state sufficiently. In addition, since the holding member has heat insulation properties, when the ventilator is attached to the ventilator, even if there is a large difference between the outer diameter of the trunk of the ventilator and the ventilator diameter, the inflow of heat in the ventilator part And spillage can be minimized.

  In the present invention, it is preferable to provide a throttle portion having a diameter smaller than the diameter of the body portion on the open end side on the other side of the body portion. In this way, by providing the throttle part, it is possible to achieve good ventilation by requesting the throttle part to the ventilation layer provided on the indoor side of the ventilation port. The diameter of the throttle portion is not particularly limited as long as it can ventilate the room or the ventilation layer.

  Next, a preferred embodiment of the ventilator will be described with reference to the drawings. FIG. 1 is an assembled sectional view of a ventilating apparatus according to the present embodiment. FIG. 2 is a front view. FIG. 3 is a development view of the ventilation apparatus according to the present embodiment. FIG. 4 is a diagram illustrating a state in which the ventilation device according to the present embodiment is attached to the outer wall.

  The ventilator A shown in the figure has a first member 1, a second member 2, and a holding member 3, and in particular, an internal water blocking member 4 is further inserted inside the second member 2, Even in the case of a severe downfall such as a storm, the intrusion of rainwater into the indoor side can be prevented almost completely.

  As for the 1st member 1, the disk part 1a is formed in the front, and the boss | hub part 1b fitted to the 2nd member 2 is formed in the back surface side. A through hole 1c is formed through the disk portion 1a and the boss portion 1b, and a gallery 1d is formed in the through hole 1c. A drainage groove 1e is formed at the lower end of the through-hole 1c for allowing water that has entered the interior through the louver 1d to flow.

  In addition, a ring-shaped concave groove 1f that fits with a ring-shaped protrusion formed on the flange portion of the second member 2 is formed on the back surface of the disk portion 1a. The concave groove 1f has a function of fitting together with the corresponding portion of the second member 2 together with the boss portion 1b to strengthen the assembled state.

  As described above, in the first member 1 in which the louver 1d and the drainage groove 1e are formed, the vertical direction is determined. That is, the downward direction of the louver 1d (the side where the drainage groove 1e is formed) is downward. For this reason, a positioning groove 1g is formed on the back surface of the disk portion 1a.

  The second member 2 has a body portion 2a. A flange portion 2b is provided at one open end of the body portion 2a, and a water return portion 2c made of a standing piece is provided at the other end side. It has been. Further, a cylindrical housing portion 2d for housing the internal water stop member 4 is formed inside the body portion 2a, and the bottom portion of the storage portion 2d is engaged with the internal water stop member 4 so that each other. An engagement protrusion 2e for setting the position is formed. In addition, the accommodating part 2d is comprised so that the boss | hub part 1b formed in the 1st member 1 can be fitted while accommodating the internal water stop member 4. FIG.

  As described above, the size of the flange portion 2b is smaller than the diameter of the disk portion 1a of the first member 1 and larger than the diameter of the ventilation port, and a predetermined thickness (suitable for filling a waterproof sealant). Thickness corresponding to the dimension). Further, a ring-shaped fitting protrusion 2f that fits into the groove 1f formed in the first member 1 is formed on the end surface of the flange portion 2b.

  As for the 2nd member 2, the top-and-bottom direction is determined by providing the water return part 2c which consists of a standing piece. That is, the base of the water return portion 2c is on the lower side. For this reason, positioning protrusions 2g are formed at positions facing the positioning grooves 1g of the first member 1 on the extended surface of the base portion of the water return portion 2c on the end surface of the flange portion 2b.

  The holding member 3 is made of a sponge-like member formed in a C shape, and has an inner diameter that is substantially the same as or slightly smaller than the outer diameter of the body 2a of the second member 2, and the ventilation hole to which the outer diameter is to be attached. It has a dimension that is sufficiently larger than the inner diameter. The width dimension of the holding member 3 is not particularly limited, but has a dimension that can stabilize the position of the ventilator when inserted into the ventilation port.

  The internal water stop member 4 is housed inside the second member, and has a function of preventing the rainwater that is blown from the slit of the louver 1d from being blown by the upward wind or the like during a storm. For this reason, it has the water return part 4b which consists of a drooping piece formed in the edge part of the cylindrical body 4a toward the other side (from the upper part of the internal water stop member 4 to the lower part) from the inclination direction downstream side of the gallery 1d. Configured. An engaging groove 4c for engaging and positioning with an engaging protrusion 2e provided on the second member 2 is formed at a portion facing the water return portion 4b.

  In the figure, reference numeral 5 denotes an insect screen arranged between the boss 1b of the first member 1 and the internal water blocking member 4. The arrangement position of the insect screen 5 is not limited to the present embodiment, and may be any position in the trunk portion 2a of the second member 2. Reference numeral 6 denotes a masking film that protects the surface of the disk portion 1a of the first member 1, and is peeled off after the ventilation device A is attached.

  When assembling the ventilation apparatus A with the members 1 to 5, first, the internal water blocking member 4 is accommodated in the accommodating portion 2 d of the second member 2. At this time, by engaging the engagement protrusion 2e of the second member and the engagement groove 4c of the internal water blocking member 4 with each other, the bases of the water return portions 2c and 4b provided on the members 2 and 4 are alternately arranged. It is arranged to become.

  Next, the insect-repellent net 5 is put on the internal water-stopping member 4 accommodated in the accommodating portion 2 d of the second member 2. Furthermore, the positioning protrusion 2g of the second member 2 and the positioning groove 1g of the first member 1 are engaged, and the boss portion 1b of the first member 1 is fitted into the accommodating portion 2d, and at the same time, the flange portion 2b. The fitting protrusion 2f is fitted into the groove 1f. Thus, it is possible to match the direction of the louver 1d and the direction of the water return portion 4b of the internal water blocking member 4 by assembling the fitting protrusion 2f and the concave groove 1f.

  Then, the ventilation apparatus A is comprised by winding the holding member 3 around the outer periphery of the trunk | drum 2a of the 2nd member 2, and adhere | attaching it with an adhesive agent, an adhesive tape, etc. FIG. In particular, when the first member 1, the second member 2, and the internal water blocking member 4 are assembled to each other and assembled, it is possible to realize a strong assembly by applying an adhesive to the contact portion. is there.

  Next, a procedure for mounting the ventilator A configured as described above to the ventilation port will be described. As shown in FIG. 3, a ventilation port 12 is formed in the outer wall 11. When the ventilation device A is attached to the ventilation port 12, a sealant is applied to the inner surface of the disk portion 1a in advance along the outer periphery of the flange portion 2b, and then attached to the outer periphery of the trunk portion 2a of the second member 2. The outer diameter of the holding member 3 is compressed, and this compressed state is held and inserted into the ventilation port 12. And when the collar part 2b contact | abuts on the outer surface of the outer wall 11, insertion of the ventilation apparatus A is stopped. At this time, the sealing material 14 is filled in a gap 13 formed between the disk portion 1 a and the outer surface of the outer wall 11. A part of the surplus sealing material is pushed into the ventilation port, and the remaining surplus sealing material protrudes from the disk portion 1a. The surplus sealing material protruding from the disk portion 1a is wiped off with a spatula or the like using the outer edge portion of the disk portion 1a as a ruler.

  In the above state, the ventilator A is stably held at a predetermined position of the ventilation port 12 by the holding member 3 having an elastic inside by the sealing material 14 whose outer surface side is filled in the gap 13.

  Note that, even when a water gradient is formed in the ventilation port 12 as shown by a two-dot chain line in FIG. 3, the ventilation port A is deformed in accordance with the water gradient of the ventilation port 12 by the holding member 3. In addition, since the disk portion 1a is positioned in equilibrium with the outer surface of the outer wall 11 by the sealing material 14, the disk portion 1a is stably held without being inclined to a predetermined position of the ventilation port 12.

  As described above, the gap 13 equal to the thickness of the flange 2b is formed between the back surface of the disk portion 1a of the first member 1 constituting the ventilation device A and the outer surface of the outer wall 11, and the gap 13 has a seal. Since the material 14 is filled, it is possible to block the minute gap formed between the outer surface of the outer wall 11 and the flange 2b and prevent rainwater from entering.

  In addition, since the heat-insulating holding member 3 is disposed in the space between the body portion 2b of the ventilator A and the ventilation opening 12, it becomes possible to eliminate excessive heat exchange between indoor air and outside air. It is possible to realize a favorable ventilation with less heat loss.

  Next, another embodiment of the ventilator will be described with reference to the drawings. FIG. 4 is a view for explaining a ventilator having a throttle portion on the trunk. FIG. 5 is a view for explaining a ventilating apparatus in which a throttle part is provided in the trunk part and the throttle part is refracted. In the figure, the same parts as those in the first embodiment and the parts having the same functions are denoted by the same reference numerals and the description thereof is omitted.

  FIG. 4 shows a configuration in which a throttle portion 2 h is provided on the other open end side of the body portion 2 a of the second member 2. The diameter of the throttle portion 2h is not particularly limited as long as it can satisfy the amount of air to be ventilated.

  In this example, the diameter of the throttle portion 2h can be made smaller than the diameter of one side (the first member 1 side) of the body portion 2a. For example, an obstacle inside the outer wall (made of concrete such as lightweight cellular concrete) It is easy to attach a ventilator by evading obstacles (existing equipment piping, etc.) existing inside the outer wall. Therefore, ventilation is shifted from the desired position (the same position in the horizontal direction on each floor, the same position in the vertical direction on the same floor, the center of the outer wall panel, etc., where you want to attach it aesthetically) due to the presence of the obstacle. It becomes easy to avoid having to install the appliance, and the degree of deterioration of the exterior design of the building due to the installation of the ventilation appliance can be suppressed.

  In FIG. 5, the diaphragm portion 2h has a refracting portion 2i that is refracted substantially perpendicularly upward. The end portion (upper end portion) of the refracting portion 2i is set to a position substantially equal to or smaller than the outer peripheral surface of the trunk portion 2a, and when inserted into the ventilation opening, the ventilation device A of the first embodiment. It is possible to carry out similarly.

  In this example, when the thickness of the outer wall is small, it is possible to ventilate by inserting the refracting portion 2i into the indoor ventilation layer.

  In each of the above examples, since the throttle portion 2h is provided in the barrel portion 2a, the stepped portion between the barrel portion 2b and the throttle portion 2h can function as a water return, and the internal stop in the first embodiment can be achieved. The water member 4 becomes unnecessary. Further, in the example of FIG. 5, the open end on the indoor side faces upward, so that the refracting portion 2 i can function as a water return portion 2 c provided on the second member 2.

  In addition, the attachment position of the holding member 3 may be the trunk portion 2a or the throttle portion 2h. In this case, it is preferable that the holding member 3 is attached so as to be in contact with the trunk portion 2a so that the positional deviation is less likely to occur during insertion into the ventilation port. .

  The ventilator A of the present invention can be suitably used not only for newly built buildings but also for repairing existing buildings.

It is assembly sectional drawing of the ventilator which concerns on a present Example. It is an expanded view of the ventilation apparatus which concerns on a present Example. It is a figure explaining the state which attached the ventilator which concerns on a present Example to the outer wall. It is a figure explaining the ventilator which provided the throttle part in the trunk | drum. It is a figure explaining the ventilator which provided the throttle part in the trunk | drum and refracted this throttle part.

Explanation of symbols

A Ventilator 1 1st member 1a Disk part 1b Boss part 1c Through hole 1d Gully 1e Drainage groove 1f Concave groove 1g Groove 2 2nd member 2a Body part 2b Ridge part 2c Water return part 2d Storage part 2e Engagement protrusion 2f Fitting Protrusion 2g Protrusion 2h Restriction part 2i Refraction part 3 Holding member 4 Internal water stop member 4a Tubular body 4b Water return part 4c Engagement groove 5 Insect net 6 Masking film 11 Outer wall 12 Ventilation port 13 Gap 14 Sealing material

Claims (3)

A ventilator that is attached to a circular ventilation opening on the outer wall and ventilates while preventing rainwater from entering,
A first water-stopping member having a disc shape and a louver in the central through hole;
A cylindrical body having an outer diameter corresponding to the diameter of the through hole of the first water stop member, and a diameter of a disk of the first water stop member provided at one open end of the body A flange that is smaller and larger than the diameter of the through hole and the ventilation hole and has a predetermined thickness, and a water return portion provided on the other open end side of the trunk or inside the trunk. A second water-stopping member having the first water-stopping member provided on the end surface of the flange portion of the second water-stopping member, and the second water-stopping member. A ventilation apparatus characterized by being arranged and integrated so that one open end of a member communicates. A holding member having elasticity and heat insulation and having an outer diameter larger than the diameter of the ventilation hole bored in the outer wall in a free state is attached to the outer periphery of the body portion of the second water stop member. The ventilation apparatus according to claim 1. The throttle part is formed on the other open end side of the body part of the second water stop member, and the diameter of the throttle part is configured to be smaller than the diameter of one open end side of the body part. The ventilator according to claim 1 or 2, characterized by.

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