JP4516675B2 - Attic ventilator with rainwater and snowstorm intrusion prevention function - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention reliably prevents intrusion of rainwater during storms and snowstorms during storms into the back of the hut, and greatly increases the ventilation volume compared to the conventional one, and reduces the dehumidification and exhaust heat of the shed with natural ventilation. The present invention relates to an eaves-lined building ventilation system that has sufficiently high ventilation performance.
[0002]
[Prior art]
Ventilation of the attic is indispensable to exhaust heat and dehumidify the attic of the building. The greater the ventilation in the attic, the better the heat exhaust and dehumidification effects in the attic. For this purpose, the area of the eaves through which the outside air flows in and out, and the opening area of the building ventilation device, and the ventilation resistance generated when the airflow passes can be reduced as much as possible. However, if the opening area of the ventilator is increased and the ventilation resistance is reduced, conversely, rainwater during storms and snowstorms during storms can easily enter the back of the shed, causing rain leaks and dew condensation in the building.
[0003]
Therefore, the performance required for the eaves and the building ventilation system is to reliably prevent the intrusion of rainwater and snowstorm and to introduce sufficient outside air into the back of the hut. A number of eaves and ridge ventilation systems have been devised and used so far, but it is the first priority to prevent rainwater and storm snowstorms from entering the back of the shed. The area is reduced and the ventilation resistance is increased. For this reason, the ventilation volume in the shed is small, and none of the ventilation devices can secure a sufficient ventilation volume for exhausting heat and dehumidifying the shed.
[0004]
The present inventors have already provided 2 to 3 ventilation blocks as shown in FIGS. 1 and 2 as eave skys and building ventilation devices that prevent intrusion of rainwater and the like during storms and ensure ventilation in the back of the shed. The eave sky and the building ventilation apparatus which are formed discontinuously through the gap are devised (Patent Hei 10-127216, etc.).
[0005]
[Problems to be solved by the invention]
However, as a result of further research, the present inventor has made the ventilation device as small as possible to reduce the cross-sectional area of the through-holes constituting the ventilation block in order to prevent intrusion of rainwater or the like. I had to increase the number. As a result, the ventilation resistance increased, and a sufficient ventilation volume could not be obtained, and it was difficult to say that the ventilation performance was sufficient.
[0006]
The present invention has been made in view of the problems of the prior art as described above, and the object of the present invention is to reliably prevent intrusion of rainwater during a storm and a snowstorm during a storm into the back of a hut. , Providing eaves and ridge ventilation equipment with high ventilation performance that can increase ventilation volume significantly compared to conventional and secure sufficient ventilation volume to dehumidify and exhaust heat in the back of the hut with natural ventilation power There is.
[0007]
[Means for Solving the Problems]
The eaves ventilator of the present invention is formed of a large number of through-holes having a square cross section with a side length of 4 mm to 6 mm sandwiched between an upper plate and a lower plate according to the invention of claim 1. In two or three three-dimensional ventilation blocks, the space formed by the three-dimensional ventilation block and the upper plate and the lower plate has a vertical dimension corresponding to the height of the space, either alone or in combination. It has a structure in which one or two random loop-shaped fiber net-like three-dimensional ventilation blocks that prevent rainwater or snow from entering from the side to the other side are provided. The ventilation block made up of a large number of through holes reduces the ventilation resistance by rectifying the airflow flowing in and out. In addition, the fiber mesh three-dimensional ventilation block collides rainwater and snowstorm that has entered through the ventilation block on the airflow inflow side with the mesh fiber, preventing its passage and reliably preventing entry into the back of the hut, This is an eaves ventilator with significantly increased ventilation.
[0008]
Moreover, the ridge ventilation apparatus of this invention installs the eaves-top ventilation apparatus based on Claim 1 based on invention of Claim 2 in a reverse V shape in a ridge part so that it may correspond with the inclination direction of a roof. It is made . Ventilation block made up of a large number of through holes reduces the flow resistance by rectifying the flow, and the fiber mesh three-dimensional ventilation block prevents rainwater and snowstorms from entering, ensuring that rainwater and snowstorms enter the back of the hut. This is a building ventilation system that prevents the airflow and significantly increases the amount of ventilation compared to the prior art.
[0009]
One of the features of the present invention is that the size of the through hole of the conventional ventilation block shown in FIGS. 1 and 2 is a small square cross section with a side length of 2 mm to 3 mm in order to prevent rainwater from entering. However, in the present invention, the through-hole has a large square cross-section with a side length of 4 mm to 6 mm in order to greatly increase the ventilation rate by reducing the ventilation resistance. . Another feature is that in the prior art, intrusion of rainwater and snowstorm is prevented by reducing the size of the through hole of the ventilation block as much as possible and providing a gap between the ventilation blocks. In the present invention, a fiber net-like three-dimensional ventilation block is disposed between the ventilation block and rainwater and snowstorms are thereby completely prevented. This fiber mesh ventilation block has extremely low ventilation resistance when airflow passes and has the function of preventing only rainwater and snowstorms from entering. It has a feature that the amount is greatly increased as compared with the prior art.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described based on examples with reference to the drawings. FIG. 3 shows the eaves ventilator of the present invention. In the type A shown in FIG. 3A, one random loop is formed between the two three-dimensional ventilation blocks 32 formed of a large number of through holes 36 having a square cross section with a side length of 4 mm to 6 mm. The fiber net-like three-dimensional ventilation block 33 is provided. The ventilation block in the future has a structure that is sandwiched between the upper plate 30 and the lower plate 31. Moreover, the magnitude | size of a ventilation block and a fiber net-like ventilation block shall be 30 mm-50 mm in length, and 20 mm-30 mm in width. Type B is composed of three ventilation blocks 32 ', which are the same as the ventilation blocks used in Type A, and two fiber mesh ventilation blocks 33'. Further, rainwater and snowstorms enter the shed. This is intended to improve the prevention performance.
[0011]
Next, an embodiment of the building ventilation apparatus of the present invention is shown in FIG. The type A shown in FIG. 4A is a ventilation block 42a having a square cross section made up of a large number of through holes 46 having a square cross section with a side length of 4 mm to 6 mm, and a ventilation block having a trapezoidal cross section. The fiber net-like ventilation block 43 is disposed between 42b. The ventilation block has a structure sandwiched between the upper plate 40 and the lower plate 41. The size of the ventilation block 42a and the fiber mesh ventilation block 43 is 30 mm to 50 mm in length and 20 mm to 30 mm in width, and the trapezoidal ventilation block 42b is 30 mm to 50 mm in length, 20 mm to 30 mm in the lower base, and 40 mm to 60 mm in the upper base. And Type B is composed of three ventilation blocks 42 'having the same shape as each ventilation block used in Type A and two fiber mesh ventilation blocks 43', and the back of rainwater and snowstorm huts. This is intended to improve the performance of preventing the intrusion into the water.
[0012]
[Example 1]
As an example of the present invention, the invented eaves and building ventilator were examined by conducting wind tunnel model experiments for the presence or absence of rainwater during storms and snowstorms intruding into the back of huts during windbreaks. As shown in FIG. 5, this wind tunnel device can generate rain and snowstorm with a maximum wind speed of 50 m / s. A building model in which the eaves and the building ventilation apparatus of the present invention were installed was installed in the wind tunnel test section, and the presence or absence of rainwater and snowstorm intrusion into the back of the hut was verified.
[0013]
As a result of the test, in type A of the eaves ventilator of the present invention, no rainwater intrusion into the back of the shed during rainstorms and windbreaking snow up to a wind speed of 40 m / s is observed. In Type B, no rainwater or snowstorm intrudes into the back of the hut even during storms up to 50 m / s and storms.
[0014]
In the building ventilator type A of the present invention, no rainwater or snowstorm invades the back of the hut even during storms and storms up to a wind speed of 40 m / s. In Type B, intrusion of rainwater and snowstorm into the back of the hut is not recognized at all even during storms and storms with wind speeds up to 50 m / s.
[0015]
[Example 2]
Regarding the building where the eaves and the building ventilation device of the present invention are installed, using the weather conditions such as wind speed, wind direction, temperature, solar radiation amount in each region of Japan, the simulation calculation of the ventilation amount to the back of the hut was performed, It has been proved that the ventilation device of the present invention has a high ventilation performance in which the ventilation volume is greatly increased as compared with the prior art, and the exhaust heat and dehumidification of the cabin can be sufficiently performed with natural ventilation.
[0016]
【The invention's effect】
As described above, the present invention reliably prevents the intrusion of rainwater and snowstorms into the back of a shed even in the event of a storm with a wind speed of 40 m / s to 50 m / s and stormy snow. An eave sky and a building ventilation device having a high ventilation performance that is significantly increased compared to the above and can sufficiently exhaust heat and dehumidify the back of a hut with natural ventilation is provided.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing an example of a conventional eave sky ventilation device.
FIG. 2 is a schematic sectional view showing an embodiment of a conventional building ventilation device.
FIG. 3 is a schematic cross-sectional view showing an embodiment of the eaves ventilator of the present invention. (A) is a type A eave-top ventilation device, and (b) is a type-B eave-top ventilation device.
FIG. 4 is a schematic sectional view showing an embodiment of a building ventilation device of the present invention. (A) is a type A building ventilation device, and (b) is a type B building ventilation device.
FIG. 5 is a schematic view of a side fixing portion of the wind tunnel device for generating rainwater and snowstorm in the first embodiment of the present invention.
[Brief description of symbols]
10, 20, 30, 30 ', 40, 40': Upper plate 11, 21, 31, 31 ', 41, 41': Lower plate 12, 22, 32, 32 ', 42, 42': Ventilation block 13, 23: Cavity 33, 33 ', 43, 43': Fiber network ventilation block 14, 24, 34, 34 ', 44, 44': Cylindrical body 15, 25, 36, 36 ', 46, 46': Through hole 35, 35 ', 45, 45': Random loop fiber network

Claims (2)

In two or three three-dimensional ventilation blocks formed by a large number of through-holes having a square cross section with a side length of 4 mm to 6 mm sandwiched between an upper plate and a lower plate, the three-dimensional ventilation block and the upper plate, In the space formed by the lower plate, it has a vertical dimension corresponding to the height of the space, alone or in combination, preventing rainwater or snow from entering from one side to the other side. Alternatively, the eaves ventilator has a structure in which two random loop-shaped fiber net-like three-dimensional ventilation blocks are arranged. In two or three three-dimensional ventilation blocks formed by a large number of through-holes having a square cross section with a side length of 4 mm to 6 mm sandwiched between an upper plate and a lower plate, the three-dimensional ventilation block and the upper plate, One piece that has a vertical dimension corresponding to the height of the space in the space formed by the lower plate, and that alone or in combination prevents rainwater or snow from entering from one side to the other side. Or the building ventilation apparatus which installs the eave sky ventilation apparatus which has the structure which has arrange | positioned the two random loop-like fiber net-like three-dimensional ventilation block in the ridge part so that it may correspond with the inclination direction of a roof, and a reverse V shape .

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