WO2012063427A1

WO2012063427A1 - Ventilation vent cap

Info

Publication number: WO2012063427A1
Application number: PCT/JP2011/006075
Authority: WO
Inventors: 横山　隆
Original assignee: パナソニック株式会社
Priority date: 2010-11-12
Filing date: 2011-10-31
Publication date: 2012-05-18
Also published as: CN103140719A; JP2012102963A; US20130090053A1; JP5747152B2; CN103140719B

Abstract

A ventilation vent cap comprises: a body tube part which is provided within the outer wall of a building and fitted inside a duct that provides communication between the inside of a room and the outside of a room; a screening part which is provided outside the room on the room-external side end surface of the body tube part with the interposition of a supporting member; and a cover part for covering the vertical top of an air passage between the room-external side end surface and the screening part. The screening part has a pyramidal shape, and the apex of the pyramid is positioned in the air passage, vertically above the upper end of the opening of the body tube part.

Description

Vent cap for ventilation

The present invention relates to a vent cap for ventilation.

A conventional vent vent cap is provided with a shielding plate for preventing the blowing of wind and rain on the outdoor side (see, for example, Patent Document 1). FIG. 8 is a cross-sectional view showing a configuration of a conventional vent vent cap disclosed in Patent Document 1. As shown in FIG.

As shown in FIG. 8, the ventilation vent cap includes a main body cylinder portion 102 provided in the duct 101, a conical shielding portion 104 provided from the main body cylinder portion 102 via a support member 103, and a main body cylinder portion. The cover part 105 which covers the upper part from 102 to the shielding part 104 is provided.

In such a conventional vent vent cap, since the upper part is covered with the cover part 105, the exhaust flow 106 collides with the shielding part 104 and flows downward. However, there is a problem that the pressure loss of the exhaust flow 106 increases due to the shapes of the cover portion 105 and the shielding portion 104, and the ventilation performance of the ventilator decreases.

JP 2009-222270 A

The vent vent cap of the present invention is provided outside the building through a support member on the outdoor side end face of the main body cylinder portion, which is provided in the outer wall of the building and fitted into a duct communicating the room and the outside. And a cover part that shields the upper part of the ventilation path between the outdoor side end face and the shielding part in the vertical direction. The shielding part has a cone shape, and the apex of the cone is in the ventilation path. It is located vertically above the upper end of the opening.

Such a configuration suppresses the exhaust flow from flowing in the direction of the cover. Therefore, the turbulent flow of the exhaust gas in the vicinity of the cover is prevented, the pressure loss is not increased, and the ventilation performance of the ventilator is not deteriorated.

FIG. 1 is a view showing a cross section and an exhaust flow of a ventilation vent cap according to a first embodiment of the present invention. FIG. 2 is a perspective view showing the venting vent cap and the exhaust flow. FIG. 3 is a front view showing an installed state of the vent cap for ventilation. FIG. 4 is a view showing a cross section and an exhaust flow of the vent vent cap according to the second embodiment of the present invention. FIG. 5 is a perspective view showing the ventilation vent cap and the exhaust flow. FIG. 6 is a view showing a cross section and an exhaust flow of the vent cap for ventilation according to the third embodiment of the present invention. FIG. 7 is a view showing a cross section and an exhaust flow of a vent cap for ventilation according to a fourth embodiment of the present invention. FIG. 8 is a cross-sectional view showing the structure of a conventional vent cap for ventilation.

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

(Embodiment 1)
FIG. 1 is a view showing a cross section and an exhaust flow of the vent vent cap according to Embodiment 1 of the present invention, and FIG. 2 is a perspective view showing the vent vent cap and the exhaust flow. As shown in FIGS. 1 and 2, the vent vent cap 18 includes a main body cylinder portion 5, a shielding portion 8, and a cover portion 10. Here, the shielding portion 8 is a cone 14 having a circular bottom surface 8a. The apex 13 of the cone 14 is located in the ventilation path 9 and is located vertically above the opening upper end 5 a of the main body cylinder portion 5. The main body cylinder portion 5 is provided in the outer wall 1 of the building, and is inserted and fitted into a duct 4 that communicates the indoor 2 and the outdoor 3. The shielding portion 8 is provided on the outdoor side 3 via the support member 7 on the outdoor side end surface 6 of the main body cylindrical portion 5. The ventilation path 9 is a space between the outdoor side end face 6 and the shielding part 8. The cover unit 10 blocks the upper part of the ventilation path 9 in the vertical direction (upper side of the drawing in FIG. 1). As shown in FIG. 2, the angle formed between the line connecting the apex 13 and the lower end 11 of the circular bottom 8a and the line connecting the lower end 11 and the upper end 12 of the circular bottom 8a is θ.

When the ventilation operation is performed in the above configuration, the exhaust flow 17 flows along the surface of the cone 14 of the shielding portion 8 as it passes through the main body cylinder portion 5 and approaches the vicinity of the shielding portion 8. Since the apex 13 of the cone 14 is located vertically above the opening upper end 5a of the main body cylinder portion 5, the exhaust flow 17 is less likely to flow toward the cover portion 10, and turbulence of the exhaust flow 17 near the cover portion 10 is prevented. It is. Thus, since the exhaust flow 17 that exits the main body cylinder portion 5 is smoothly exhausted along the surface of the cone 14 of the shielding portion 8, the pressure loss increases and the ventilation performance of the ventilator also decreases. There is nothing.

Further, as shown in FIG. 2, when the exhaust flow 17 exits the ventilation path 9 at the lower end 11 of the circular bottom surface 8a, the exhaust flow 17 flows at an angle θ with respect to the outer wall surface 1a. For this reason, even if the exhaust flow 17 is dirty, the exhaust flow 17 does not hit the outer wall surface 1a, so that the outer wall surface 1a can be prevented from being dirty by the exhaust flow 17.

Further, a cover portion 10 is provided in a part of the ventilation path 9. The position of the cover portion 10 is the upper side of the ventilation vent cap 18, that is, the ceiling 19 side under the eaves shown in FIG. 3 which is a front view showing the installation state of the ventilation vent cap according to the first embodiment of the present invention. Thus, even if the ventilation vent cap 18 is provided in the vicinity of the ceiling 19, the upper part of the ventilation path 9 is closed by the cover portion 10 as shown in FIG. In addition, the ceiling 19 can be prevented from becoming dirty.

(Embodiment 2)
In the second embodiment of the present invention, the same components as those in the first embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and only different points will be described. The second embodiment of the present invention is different from the first embodiment in the shapes of the shielding portion 8 and the cover portion 10.

FIG. 4 is a view showing a cross section and an exhaust flow of the ventilation vent cap according to the second embodiment of the present invention, and FIG. 5 is a perspective view showing the ventilation vent cap and the exhaust flow. As shown in FIG. 4, the shielding portion 8 has a conical 23 shape in which the apex 13 faces the main body cylindrical portion 5. Here, the base angle of the cross section of the cone 23 is δ. Further, as shown in FIG. 5, in the cover portion 10, the length of the cover edge portion 16 on the outdoor end surface 6 side is longer than the length of the cover edge portion 15 on the circular bottom surface 8 a side of the shielding portion 8. That is, the end side 26 of the cover portion 10 is a diagonally lower line from the circular bottom surface 8a side to the outdoor side end surface 6 side.

When the ventilation operation is performed in the above configuration, as shown in FIG. 4, when the exhaust flow 24 flowing through the lower portion in the main body cylinder portion 5 passes through the main body cylinder portion 5 and approaches the vicinity of the shielding portion 8, the cone 23 of the shielding portion 8 Flushed along the surface.

As shown in FIG. 5, the exhaust flow 25 flowing in the upper part of the main body cylinder 5 flows along the cover edge 15 on the circular bottom surface 8 a side of the cover 10, and shields the cover 10 near the end 26. It passes through a substantially V-shaped region S composed of the portion 8 and is discharged to the outdoor 3 from below the end side 26.

At this time, as shown in FIG. 5, the exhaust flow 25 flowing along the cover portion 10 is discharged to the outdoor 3 first from the vicinity of the apex T on the shielding portion 8 side of the region S. Further, the exhaust flow 24 is smoothly discharged to the outdoor 3 from below the end side 26. Therefore, the pressure loss does not increase and the ventilation performance of the ventilator does not deteriorate.

Note that δ is preferably in the range of 30 ° to 70 °.

(Embodiment 3)
In the third embodiment of the present invention, the same components as those in the second embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and only different points will be described. The third embodiment of the present invention is different from the second embodiment in the shape of the shielding part.

FIG. 6 is a view showing a cross section and an exhaust flow of the vent vent cap according to the third embodiment of the present invention. As shown in FIG. 6, the shielding part 38 having the circular bottom surface 38a is composed of a plurality of

cones

33, 34 having

different bottom angles

33a, 34a of the cone section instead of the conical shape. The shielding part 38 is convex with respect to the ventilation path 9. That is, the shielding part 38 is formed by joining a cone 33 having a bottom angle 33a having a conical section and a cone 34 having a bottom angle 34a having a conical section. Here, the base angle 34a is smaller than the base angle 33a. If the shielding part 38 has such a shape, the exhaust flows 24 and 25 flow more smoothly along the

cones

33 and 34, so that the pressure loss does not increase and the ventilation performance of the ventilator does not deteriorate. .

In order to prevent the exhaust flows 24 and 25 from moving toward the outer wall 1, it is desirable to increase the bottom angle 33a. However, when the base angle 33a is increased, the thickness dimension B of the shielding portion 38 increases. When the thickness dimension B increases, the shielding portion 38 closes the opening 21 of the main body cylinder portion 5, so that the distance C from the outer wall surface 1 a to the circular bottom surface 38 a needs to be increased.

In the third embodiment, the shielding portion 38 is composed of two

cones

33 and 34, and the bottom angle 34a of the cone 34 is smaller than the bottom angle 33a of the cone 33. Therefore, the thickness dimension of the shielding part 38 can be reduced to the maximum while the exhaust flows 24 and 25 are along the

cones

33 and 34.

Here, the flow of the exhaust streams 24 and 25 is as follows. As the exhaust streams 24, 25 approach the cone 34, they flow radially outward along the surface of the cone 34. The exhaust streams 24 and 25 flow along the cone 33 when reaching the cone 33, leave the ventilation vent cap 18 at the lower end 11, and are discharged to the outdoor 3. Since the exhaust flows 24 and 25 have a directional component of the bottom angle 33 a with respect to the outer wall surface 1 a at the lower end 11, the exhaust flows 24 and 25 do not go toward the outer wall 1.

The pressure loss of the ventilation vent cap 18 is smaller as the distance between the center 20 of the shielding portion 38 and the outdoor end face 6 is larger (the ventilation airflow flows more). Further, as the angle of the lower end 11 (bottom angle 33a) is larger, the exhaust flows 24 and 25 are separated from the outer wall surface 1a, so the antifouling effect of the outer wall 1 is enhanced (the angle of the lower end 11 is preferably 70 ° at the maximum) . For this reason, since the shielding part 38 is comprised using the some

cones

33 and 34, the center 20 and the outdoor side end surface 6 can take an appropriate distance. Therefore, the fall of ventilation air volume is suppressed and the angle of the lower end 11 can be made larger. As a result, the antifouling effect of the outer wall 1 is increased, and the allowance dimension C can be reduced, so that a thin vent cap 18 having excellent exterior properties is obtained. In the third embodiment, the shielding portion 38 is composed of two

cones

33 and 34, but may be composed of three or more cones combined.

(Embodiment 4)
In the fourth embodiment of the present invention, the same components as those of the second embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and only different points will be described. The fourth embodiment of the present invention is different from the second embodiment in the shape of the shielding part.

FIG. 7 is a view showing a cross section and an exhaust flow of the vent cap for ventilation according to the fourth embodiment of the present invention. As shown in FIG. 7, the shielding portion 48 is formed by combining a plurality of

spherical surfaces

42 and 43 having different radii instead of the conical shape. The shielding part 48 is convex with respect to the ventilation path 9.

Since the shielding part 48 is composed of the two

spherical surfaces

42 and 43, the

exhaust flow

24 and 25 exiting from the room can be smoothly changed from the straight traveling direction J to the blowing direction G, and the ventilation airflow is reduced. It can be suppressed. Further, at the lower end 11 where the exhaust flow 24 is separated from the ventilation vent cap 18, the exhaust flow 24 flows to the outdoor 3 side at an angle close to the angle orthogonal to the outer wall 1, and the outer wall 1 is not contaminated by the exhaust flow 24. Moreover, since the surface of the shielding part 48 consists of the two

spherical surfaces

42 and 43, the connection part of each spherical surface 42 and the spherical surface 43 becomes gentle, and does not produce a ridgeline. As a result, since dust does not collect in the ridge line portion, the surface of the shielding portion 48 can be kept clean, and the beauty of the product itself can be maintained.

The vent cap for ventilation according to the present invention is useful for an outdoor hood or the like attached to the outer wall of a building.

DESCRIPTION OF SYMBOLS 1 Outer wall 1a Outer wall surface 2 Indoor 3 Outdoor 4 Duct 5 Main body cylinder part 5a Opening upper end 6 Outdoor end surface 7

Support member

8,38,48

Shielding part

8a, 38a Circular bottom face 9 Ventilation path 10 Cover part 11 Lower end 13 Vertex 14 Cone 15 Cover edge portion 16 on the circular bottom face side

Cover edge portions

17, 24, 25 on the outdoor end face side Exhaust flow 18 Ventilation vent cap 19 Ceiling 20 Center 21

Opening portions

23, 33, 34 Cone 26

End sides

33a,

34a Bottom angle

42,43 spherical surface

Claims

A main body cylinder portion that is provided in the outer wall of the building and is inserted into a duct that communicates the room with the outside;
A shielding part provided outside the room via a support member on the outdoor side end surface of the main body cylinder part;
A cover portion that shields the upper side in the vertical direction of the ventilation path between the outdoor end surface and the shielding portion;
The ventilation vent cap according to claim 1, wherein the shielding portion has a cone shape, and the apex of the cone is positioned in the ventilation path and vertically above the upper end of the opening of the main body cylinder portion.
A main body cylinder portion that is provided in the outer wall of the building and is inserted into a duct that communicates the room with the outside;
A conical shielding portion provided on the outdoor side end surface of the main body cylinder portion via a support member, and having a vertex facing the main body cylinder portion;
A cover portion that shields the upper side in the vertical direction of the ventilation path between the outdoor end surface and the shielding portion;
The ventilation vent cap according to claim 1, wherein the cover portion has a longer cover edge portion on the outdoor end surface side than a cover edge portion on the circular bottom surface side of the shielding portion.
3. The ventilation vent according to claim 2, wherein the shielding part is composed of a plurality of cones having different cone angles instead of a conical shape, and the shielding part is convex with respect to the ventilation path. cap.
The ventilation vent cap according to claim 2, wherein the shielding portion is formed in a composite shape with a plurality of spherical surfaces having different radii instead of a conical shape, and the shielding portion is convex with respect to the ventilation path.