JP4930352B2 - Vent cap for ventilation - Google Patents

Description

  The present invention relates to a venting vent cap installed on an outer wall portion of a building when indoor air of a house or the like is ventilated outside the room.

  Conventionally, as this type of ventilation vent cap, a ventilation vent cap provided with a shielding plate for preventing the blowing of wind and rain on the indoor side is known (for example, see Patent Document 1).

  The ventilation vent cap will be described below with reference to FIG.

As shown in the figure, in a ventilation vent cap in which a shielding plate 103 for preventing wind and rain intrusion is provided by a support member 102 in front of the outdoor side end portion of a cylindrical main body cylinder 101, the shielding plate 103 is substantially flat. On the other hand, an outward flange 104 is formed at the periphery of the front end opening of the main body cylinder 101. The outward flange 104 projects forward and a guide frame 105 is attached. The guide frame 105 is a cylindrical frame flange. 105a and a collar 105b projecting with an enlarged diameter forward, and the front edge of the collar 105b is located on the inner side of the shielding plate 103 to prevent wind and rain intrusion.
JP-A-8-240331 (0010 paragraph, 0011 paragraph, FIG. 1)

  Moreover, the vent vent cap of patent document 2 is known as a vent vent cap provided with the windproof board of another shape in order to prevent wind and rain invasion. The ventilation vent cap will be described with reference to FIG.

As shown in the figure, a duct connecting cylinder member 112 fitted into a ventilation duct 111 provided on a wall 110 of a building, and a ventilation vent fixed to the duct connecting cylinder member 112 and attached to the outdoor side of the wall 110. The cap body 113, the tapered cover 114 that is provided around the ventilation vent cap body 113 and protrudes from the ventilation vent cap body 113 and that widens toward the outdoor side, and wind and rain are generated from the front of the ventilation vent cap body 113. A windbreak plate 115 that covers the outdoor side of the ventilation vent cap body 113 at a position where it is not blown, and is disposed so as to have a ventilation space between the ventilation vent cap body 113 and the tapered cover 114; The windproof plate 115 is bent toward the outdoor side and the taper-shaped cover 114 is attached to the outdoor side. It has a configuration which is positioned inside the periphery of.
JP 2000-320870 A (3rd page, 4th column, FIG. 2)

  In such a conventional venting vent cap, the venting vent cap described in Patent Document 1 is effective in the rain intrusion when it rains, but when the main purpose of the venting vent cap is ventilated The indoor dirty air passes through the main body cylinder 101, hits the shielding plate 103, changes its direction to the outer peripheral direction of the shielding plate 103, and exhausts it to the outside of the room. At this time, the air hitting the shielding plate 103 is bounced back by the shielding plate 103 and becomes an exhaust flow toward the outer wall surface. When the air exhausted from the room is dirty, the exhaust flow is dirty. Therefore, when the dirty exhaust flow hits the outer wall surface, the outer wall surface becomes dirty. Further, when the wind speed of the exhaust flow is high, the exhaust flow bounced back to the outer wall surface increases, and the outer wall surface is further contaminated by the exhaust flow.

  In addition, the vent vent cap described in Patent Document 2 has an effect of reducing the pressure loss by positioning the peripheral edge of the tapered cover 114 outside the windbreak plate 115, but the exhaust flow from the room is limited. Passes through the inner peripheral surface of the tapered cover 114, so that the inner peripheral surface becomes dirty. In such a case, when the ventilation vent cap installed on the wall is viewed from the front, the dirty inner peripheral surface of the tapered cover 114 can be seen, so that the ventilation vent cap becomes dirty due to the exhaust flow. Not only deteriorates the appearance of the exterior wall, but also deteriorates the appearance of the outer wall itself provided with a vent cap for ventilation.

  On the other hand, in recent years, it has been obligated to always operate the ventilation fan due to the airtightness of the house, and in the vent vent cap described in Patent Document 1, the dirty exhaust flow always hits the wall and the outer wall becomes dirty. End up. In addition, in the ventilation vent cap described in Patent Document 2, the appearance of the ventilation vent cap, and further, the outer wall itself is deteriorated by seeing dirt on the inner surface of the ventilation vent cap installed on the outer wall. .

  In such a conventional vent vent cap, there is a problem that the exhaust flow is bounced back to the shielding plate and the contaminated exhaust flow hits the outer wall, thereby contaminating the outer wall. In addition, if the windshield of the ventilation vent cap is smaller than the tapered cover, there is a problem that the ventilation vent cap itself can be seen and the appearance of the outer wall itself is impaired, and the ventilation vent cap is installed. There is a need for a vent cap for ventilation that prevents the entire outer wall from being soiled and invisible.

  The present invention solves such a conventional problem, and even if there is a shielding plate in front of the ventilation port, it can prevent the exhaust flow from being rebounded by the shielding plate and contaminating the outer wall, and from the front. It is an object of the present invention to provide a venting vent cap that can cover a dirty part even when the venting vent cap is seen, can prevent rain from entering, and has low pressure loss.

  In order to achieve the above object, a vent cap according to the present invention is provided in the outer wall of a building and is fitted into a duct that communicates between the indoor side and the outdoor side, and the outdoor side of the main body cylindrical part Ventilation vent cap provided with a shielding portion provided outside through a support member at the end portion, and provided with a conical collar protruding from the outdoor side opening of the main body cylinder portion to the outdoor side, The collar has an axial center coinciding with that of the main body cylinder, and the front edge thereof is located at substantially the same diameter as the shielding part or inside the diameter of the shielding part, and is projected to expand toward the shielding part, The virtual extension line in the protruding direction does not intersect with the shielding part.

  Another means is that the shielding portion has a protruding portion whose thickness increases on the indoor side from the outer peripheral edge toward the central portion.

  In another means, a frame portion having an outer diameter smaller than the diameter of the shielding portion and an inner diameter larger than the inner diameter of the main body cylinder portion is provided outside the outdoor opening of the main body cylinder portion.

  According to the present invention, even if the indoor air is an exhaust flow including dirt, the exhaust flow is guided by the conical collar and flows to the outer wall side when leaving the outer peripheral edge of the shielding portion. Therefore, the exhaust flow does not hit the outer wall surface, and it is possible to prevent the outer wall surface from being contaminated by the exhaust flow, and when the ventilation vent cap is viewed from the front, the collar is located at substantially the same diameter or inside as the shielding part. A vent cap for ventilation that has the four effects of preventing the dirt from adhering to the inside of the collar by the exhaust flow, preventing rain from entering, and reducing the pressure loss of the vent cap can be obtained.

  In addition, when a dirty exhaust flow from the room hits the shielding part through the main body cylindrical part, it is guided along the surface of the projecting shape part, and when the exhaust flow leaves the outer periphery of the shielding part, it is closer to the outdoor side than the outer peripheral direction. Since the air flows at an angle, the exhaust flow does not return to the outer wall surface, and contamination of the outer wall due to the exhaust flow can be prevented.

  In addition, rain that has entered from between the shielding part and the front edge of the collar adheres to the front part of the main body cylinder part, but the attached rainwater is attached to the main body by a frame provided outside the outdoor opening of the main body cylinder part. Since it does not enter the opening of the tube portion, rainwater can be prevented from entering the room.

The ventilation vent cap according to claim 1 of the present invention includes a main body cylinder portion that is provided in an outer wall of a building and is fitted and inserted into a duct that communicates the indoor side and the outdoor side, and an outdoor end portion of the main body cylindrical portion. A ventilation vent cap provided with a shielding part provided outside through a support member, and a conical collar is provided by projecting from the outdoor opening of the main body cylinder part to the outdoor side. Is aligned with the cylindrical portion of the main body, and the front edge thereof is located at substantially the same diameter as the shielding portion or on the inner side of the diameter of the shielding portion, and projects with an enlarged diameter toward the shielding portion. A configuration in which the virtual extension line in the protruding direction does not intersect with the shielding portion, and the shielding portion guides the dirty exhaust flow from the room along the surface, and the exhaust flow from the outer peripheral edge of the shielding portion. When moving away from the outer peripheral direction, Is obtained by a configuration having a protrusion-shaped portion having a thickness increasing in the indoor side toward the center from the outer peripheral edge as flowing with a through the main body tube portion becomes dirty from the exhaust air stream When it hits the shielding part, it is guided along the surface of the protruding part, and when the exhaust flow moves away from the outer periphery of the shielding part, it flows at an angle outside the outer peripheral direction, so that the exhaust flow returns to the outer wall side. In addition, it can prevent dirt on the outer wall due to the exhaust flow, and when the vent vent cap is viewed from the front, dirt attached to the inside of the collar due to the exhaust flow is not visible, rain is difficult to enter, and the vent vent cap It can reduce pressure loss, both ventilation vent cap for response rate four effect that can be obtained.

In the vent cap according to claim 2 , a frame portion having an outer diameter smaller than the diameter of the shielding portion and an inner diameter larger than the inner diameter of the main body cylinder portion is provided outside the outdoor opening of the main body cylinder portion. Rainwater that has entered from between the shielding part and the front edge of the collar adheres to the front part of the main body cylinder part, but the attached rainwater flows along the outer periphery of the frame part and drops from the left and right ends of the outer periphery. Since it does not enter the opening of the main body cylinder portion, it is possible to prevent the rain that has entered the inside of the collar from entering the room.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1, a main body cylinder portion 5 that is provided in the outer wall 1 of the building and is fitted and inserted into a duct 4 that communicates between the indoor 2 side and the outdoor 3 side, and in front of the outdoor side end portion of the main body cylinder portion 5. A flange 11 that is in contact with the outer wall surface 1a is formed on the peripheral edge 10 of the outdoor opening 9 of the main body cylinder 5; A conical collar 12 is provided so as to protrude from the outdoor opening 9 toward the outdoor side 3. The collar 12 is provided so that the axis of the main body cylinder 5 coincides with the axis, and the front edge 13 of the collar 12 has substantially the same diameter as that of the shielding part 7, and expands and projects toward the shielding part 7. The virtual extension line L is formed so as not to intersect the shielding part 7.

  In the above configuration, when ventilation is performed, the exhaust air, which is dirty air in the room 2, passes through the main body cylinder portion 5, and the exhaust air flow that exits from the outdoor opening 9 of the main body cylinder portion 5 goes straight toward the shielding portion 7. And the exhaust flow 15 that flows along the inner peripheral surface of the conical collar 12 while spreading slightly. At this time, the collar 12 starts from the outer peripheral portion of the flange 11 formed in the outdoor opening 9. Since the diameter is increased and expanded toward the outdoor 3 side, no vortex is generated in the vicinity of the base 16 of the collar 12, and the exhaust flow 15 flows smoothly and the pressure loss can be reduced.

  Further, when the exhaust flow 14 traveling straight toward the shielding portion 7 hits the shielding portion 7, the direction of the exhaust flow 14 is changed from the straight direction to the direction of the outer peripheral edge 17 of the shielding portion 7. Is formed so as not to intersect with the shielding portion 7, so that it is combined with the air flow 15 flowing along the inner peripheral surface of the collar 12, and the combined exhaust flow is directed toward the outer wall 1 side. It is exhausted to the outdoor 3. At this time, even if the exhaust flow is dirty, it does not flow toward the outer wall 1, so that the dirty exhaust flow does not hit the outer wall surface 1 a and can prevent the outer wall surface 1 a from being dirty.

  Further, when the dirty exhaust flow flows into the ventilation vent cap, dirt adheres to the inner peripheral surface of the collar 12, but the front edge 13 which is the outer peripheral portion of the collar 12 is substantially the same as the outer peripheral edge 17 of the shielding portion 7. Since it has a diameter, when the ventilation vent cap is viewed from the front, dirt on the inner peripheral surface of the collar 12 is not visible.

  Further, when it rains, the rain is applied to the outer periphery of the collar 12, but the collar 12 is enlarged in diameter toward the shielding part 7, in other words, the collar 12 is reduced in diameter toward the main body cylinder part 5. 2 has a slope through which rainwater flows toward the flange 11, rainwater flows from the collar 12 toward the flange 11, and further down along the outer periphery of the flange 11, and the flange shown in FIG. 11 reaches the left and right ends 19 and drops downward. At this time, even if a strong wind 20 such as a typhoon blows from the outdoor 3 to the outer wall surface 1 a, the rainwater dripped from the collar 12 falls on the outer wall 1 side from the front edge 13 of the collar 12, so it blows to the outer wall surface 1 a. Contrary to the wind 20, the air flows toward the shielding part 7 and does not enter from the front edge 13 of the collar 12.

  Thus, even when strong wind 20 such as a typhoon blows during rain, rainwater does not enter the inside of the main body cylinder portion 5 and rainwater can be prevented from entering the room. In addition, by making the shielding part 7 and the collar 12 have substantially the same diameter, pressure loss is reduced, dirt is prevented from adhering to the outer wall 1 due to the exhaust flow, and a good view of the vent vent cap due to dirt blinding inside the collar 12 is obtained. The four effects of maintaining sexuality and preventing rainwater intrusion can be taken together.

  In the first embodiment, the front edge 13 of the collar 12 has substantially the same diameter as the shielding part 7. However, even if the front edge 13 is located inside the outer diameter of the shielding part 7, the front edge 13 The imaginary extension line L in the protruding direction is configured so as not to intersect the shielding part 7, and there is no difference in the operation effect.

  Further, although the flange 11 of the main body cylinder portion 5 is illustrated as an integral shape with the main body cylinder portion 5, even if the flange 11 is formed as a part of the collar 12, for example, as shown in FIG. There is no difference.

(Embodiment 2)
As shown in FIG. 4, the second embodiment has a protruding portion 22 that increases in thickness toward the interior 2 as the shielding portion 7A moves from the outer peripheral edge 17A toward the central portion 21, as compared with the first embodiment. There is a feature in the point.

  In the above configuration, when the dirty exhaust flow from the room 2 passes through the main body cylindrical portion 5 and hits the shielding portion 7A, it is guided along the surface of the projecting shape portion 22, and the exhaust flow is separated from the outer peripheral edge 17A of the shielding portion 7A. Sometimes, the exhaust flow does not return to the outer wall 1 side because it flows at an angle toward the outdoor 3 side with respect to the outer peripheral direction, and the outer wall surface 1a can be prevented from being contaminated by the exhaust flow.

  Further, the exhaust flow is rectified by both the tapered surface 23 of the protruding portion 22 on the shielding portion 7A side and the tapered surface 24 of the collar 12, and the blowing angle is determined to be blown out toward the anti-outer wall 1, thereby further increasing the outer wall. As a result, the effect of preventing dirt is increased.

(Embodiment 3)
As shown in FIG. 5, the third embodiment has an outer diameter smaller than that of the shielding portion 7 and an inner diameter of the main body cylinder on the outdoor side of the outdoor opening 9 of the main body cylinder portion 5 with respect to the first embodiment. It is characterized in that a frame portion 25 larger than the inner diameter of the portion 5 is provided.

  In the above configuration, rain that has entered from between the shielding part 7 and the collar 12 adheres to the front part 26 of the main body cylinder part 5, but the attached rainwater flows along the outer periphery of the frame part 25, and from the left and right ends of the outer periphery. Since it does not drop and enter the outdoor opening 9 of the main body cylinder portion 5, it is possible to prevent the rain that has entered the inside of the collar 12 from entering the room.

  The vent cap according to the present invention has the four effects of reducing pressure loss, preventing dirt from adhering to the wall due to exhaust flow, maintaining the appearance of the vent cap by hiding dirt inside the collar, and preventing rainwater intrusion. It is useful as a vent cap for ventilation to be attached to the outer wall.

Sectional drawing which shows the installation state of the vent cap for ventilation of Embodiment 1 of this invention Perspective view of the venting vent cap Sectional drawing which shows another structure of the vent cap for the ventilation Sectional drawing which shows the installation state of the vent cap for ventilation of Embodiment 2 of this invention Sectional drawing which shows the installation state of the vent cap for ventilation of Embodiment 3 of this invention Sectional drawing which shows the installation state of the vent cap for the conventional ventilation Sectional drawing which shows the installation state of other conventional vent caps for ventilation

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer wall 2 Indoor 3 Outdoor 4 Duct 5 Main body cylinder part 6 Support member 7 Shielding part 7A Shielding part 9 Outdoor side opening part 12 Collar 13 Front edge 17A Outer peripheral edge 21 Center part 22 Projection shape part 25 Frame part

Claims (2)

A main body cylinder portion that is provided in the outer wall of the building and is inserted into a duct that communicates between the indoor side and the outdoor side, and a shielding portion that is provided outside the outdoor end portion of the main body cylinder portion via a support member. A vent cap for ventilation provided with a conical collar projecting from the outdoor opening of the main body cylinder portion toward the outdoor side, the collar having the same axis as the main body cylinder portion; and The front edge is positioned approximately the same diameter as the shielding part or inside the diameter of the shielding part, and projects with an enlarged diameter toward the shielding part, and a virtual extension line in the projecting direction does not intersect the shielding part. In addition, the shielding unit is configured such that a dirty exhaust flow from the room is guided along the surface, and when the exhaust flow moves away from the outer peripheral edge of the shielding unit, the shielding unit has an angle more outward than the outer circumferential direction. toward the center from the outer peripheral edge flowing has Ventilation vent cap having a protrusion-shaped portion having a thickness increasing in the indoor side in accordance with earthenware pots. The ventilation vent cap according to claim 1, wherein a frame part having an outer diameter smaller than a diameter of the shielding part and an inner diameter larger than the inner diameter of the main body cylinder part is provided outside the outdoor opening of the main body cylinder part.

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