JPH0448144B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a ventilation system provided on the outer wall of a building such as a residence.

[Background technology]

Conventionally, as shown in FIG.
is installed to provide attic ventilation or indoor ventilation. As shown in FIG. 3, the ventilation girder 53 has a plurality of downward walls 54a formed on a gallow component plate 54, and a ventilation hole 55 is provided in each downward wall 54a.
In the outer wall 51, a large number of openings 57 are vertically arranged in an exterior plate 56, and a ventilation hood 58 is fitted into each opening 57. As shown in FIG. 4, the ventilation hood 58 is box-shaped with open front and top surfaces, and is fixed to the exterior plate 56 by flanges 58a on both front side edges and the lower edge. 59 is a mesh body, with ventilation 5
3 and the exterior plate 56 to perform waterproof and insect-proof functions.

According to this ventilation structure, since the ventilation pane 53 having the downward wall 54a and the hood 58 are provided, the intrusion path of the outside air is curved to some extent, and rainwater is prevented from entering together with the outside air. The net body 59 also provides a waterproof effect.

However, during strong winds, the entry route may be bent and the net 59
However, as shown by arrow a, there is a problem in that rainwater enters indoors along with the outside air.

[Purpose of the invention]

An object of this invention is to provide a ventilation system that prevents rainwater from entering during strong winds.

[Disclosure of the invention]

The ventilation system of the present invention includes a ventilation grate with ventilation holes formed in a plurality of downward facing walls, a front edge fixed to the opening periphery of an exterior material placed on the indoor side of the ventilation gara, and an opening on the front and top surfaces to connect the ventilation gill to the outside wall. An opened ventilation hood, a windmill rotatably supported within the ventilation hood and rotated by incoming wind of a predetermined wind pressure or higher, and a windmill that rotates in conjunction with the rotation axis of the windmill and spreads due to its centrifugal force to spread out the ventilation hood. The ventilation hood includes an umbrella-shaped damper that closes an opening on the top surface, and a bypass air path that opens from the rear surface of the ventilation hood to the front surface of the exterior material.

According to the configuration of the present invention, when the wind is strong, the wind turbine is rotated by the incoming wind from the ventilation hole in the ventilation hole, and this rotation is transmitted to the damper via the rotating shaft, causing the damper to spread due to centrifugal force. By this,
The opening of the ventilation hood is closed to prevent rainwater from entering the room along with the incoming wind. In this case, the bypass air passage maintains a constant flow of air and the windmill continues to rotate, so the damper can reliably close the opening. In addition, when there is no wind or weak wind,
The damper becomes deflated and natural ventilation occurs. At this time, even if the ventilation hood is open, rainwater will not enter due to the incoming wind.

Embodiment A first embodiment of the present invention will be described based on FIG. This ventilation system includes a ventilation hood 2 opened to an outer wall 1, and a damper 13 that closes a flow path of the ventilation hood 2 by inflowing air from outdoors having a predetermined wind pressure or higher.
It is equipped with the following.

The ventilation hood 2 is box-shaped with an open front and upper front, and is fitted into an opening 4 provided in the exterior material 1a of the outer wall 1. The ventilation hood 2 is fixed to the exterior material 1a by a flange 2b on the front periphery with fasteners (not shown) such as wood screws. Similar to the example shown in FIG. 8, a large number of ventilation hoods 2 are arranged vertically, and a ventilation hood 5 and a mesh body 6 are arranged on the outdoor side. The ventilation rack 5 has downward walls 5a formed in multiple stages, and ventilation holes 7 formed in each downward wall 5a.

The damper 13 is made up of a large number of vanes 13b arranged radially around a rotating shaft 13a. Each blade plate 13b is supported at its upper end so as to be movable up and down. Rotating shaft 13
A is connected to a rotating shaft 15 of a wind turbine 14 provided on the front surface of the ventilation hood 2 via bevel gears 16 and 17. Support members 18 and 19 support the rotating shafts 13a and 15 on the ventilation hood 2. The ventilation hood 2 is provided with a bypass air passage 20 that opens from the rear surface to the front surface of the exterior material 1a. The outlet 20a of the bypass air passage 20 is arranged at a location where wind pressure is difficult to act, that is, at a location where the ventilation hole 7 of the ventilation hole 5 is not provided.

In this configuration, when the wind is strong, the wind turbine 14
is rotated vigorously. That rotation is damper 1
3 and the centrifugal force causes each vane plate 13b to spread as shown by the chain line in the figure. Therefore, the opening 2a of the ventilation hood 2 is closed to block the wind. Therefore, even if it rains, rainwater will not enter the house along with the incoming wind. Opening 2a with damper 13
Even if the is closed, there is a bypass air passage 20, so
Air flow is maintained and the windmill 14 continues to rotate.
When there is no wind or weak wind, damper 1 is set as shown by the solid line in the figure.
3 is in a deflated state and natural ventilation is performed. Note that the installation location of this ventilation device is not limited to the location of the ventilation pane 53 in FIG. 2, but may be located anywhere on the outer wall 1. The outer wall 1 here refers to the outer peripheral part of a building, and may be a cloth foundation, or a curtain part between upper and lower floor outer wall panels of a building.

〔Effect of the invention〕

In the ventilation system of this invention, when the wind is strong, the windmill is rotated by the incoming wind from the ventilation hole in the ventilation hole.
This rotation is transmitted to the damper via the rotating shaft, and the damper expands due to centrifugal force. This closes the opening of the ventilation hood and prevents rainwater from entering the room along with the incoming wind. In this case, the bypass air passage maintains a constant flow of air and the windmill continues to rotate, so the damper can reliably close the opening. In addition, when there is no wind or weak wind, the damper is in a deflated state, which has the effect of natural ventilation. In addition, by setting the ventilation holes formed in the downward facing wall and the opening formed on the top surface of the ventilation hood, upward air can be brought into the room. This provides extremely good ventilation.
In addition, since the ventilation holes and the openings formed on the top surface of the ventilation hood are approximately horizontal, even if the damper does not close the openings on the top surface of the ventilation hood in a calm state,
This has the effect of preventing rain from penetrating indoors.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of an embodiment of the present invention, Fig. 2 is a front view of a building equipped with a conventional ventilation gate,
FIG. 3 is a sectional view of the ventilation hood, and FIG. 4 is a perspective view of the ventilation hood. 1...Outer wall, 2...Ventilation hood, 2a...Opening, 5...Ventilation hole, 6...Network, 7...Opening, 13...Damper, 14...Windmill, 15...Rotating shaft, 20 ...Bypass air path.

Claims (1)

[Claims] 1. A ventilation hood with ventilation holes formed in a plurality of downward facing walls, a ventilation hood whose front edge is fixed to the opening periphery of the exterior material placed on the indoor side of the ventilation hood, and whose front and top surfaces are open and open to the outside wall; A windmill that is rotatably supported within this ventilation hood and rotates by incoming wind of a predetermined wind pressure or higher, and an umbrella that rotates in conjunction with the rotation shaft of this windmill and expands due to its centrifugal force to close the opening on the top surface of the ventilation hood. A ventilation system comprising: a damper having a shape of 100 mm, and a bypass air passage opened from the rear surface of the ventilation hood to the front surface of the exterior material.