JP3541235B2 - Vent cap for ventilation - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a vent cap for ventilation.
[0002]
[Prior art]
In the event of a storm such as a typhoon, rain infiltrates through a ventilation vent cap installed on the outer wall of the building, and often causes accidents that cause much damage to the room. Reasons for such rainwater intrusion include the fact that the location of the problem is the outer wall that cannot be directly inspected, and that it is difficult to confirm the site because damage occurs in a short time during the passage of a typhoon etc. As a result, full-scale problem handling has not been done so far.
[0003]
As is well known, typical vent caps used for ventilation include the following.
▲ 1 ▼ Flat type
16 and 17 show a longitudinal sectional view and a front view thereof. The flat vent cap 101 is attached to a place where rain does not hit, such as under the eaves, but since there is no hood, there is a risk that rain directly enters. It is the cheapest but has the most rain and wind.
(2) Cell food type
18 and 19 show a longitudinal sectional view and a front view thereof. The cell hood type vent cap 102 is improved from the viewpoint of preventing rain from entering the flat type vent cap, and is the most popular product, and is attached to an outer wall surface other than under the eaves to prevent rain from entering. Rain from below well penetrates into the cell hood type vent cap 102.
[0004]
▲ 3 ▼ Deep type
20 and 21 show a longitudinal sectional view and a front view thereof. Although this deep vent cap 103 is a type that is currently being fixed as a countermeasure against rain infiltration, damage is caused when it is used on the air supply side, and is not complete. The drawback of the cell hood type vent cap 102 is improved, and the hood is further deepened. There is less rain infiltration than the flat type vent cap 101 and the cell hood type vent cap 102, but damage often occurs in the case of air supply. Sometimes.
▲ 4 ▼ type
FIG. 22 is a longitudinal sectional view, and FIG. There are two types of blow-through vent caps 104, upper and lower and left and right blow-throughs. It has the highest rain-proof performance among the existing products, but it has a design disadvantage because it protrudes greatly from the wall surface.
[0005]
In addition to the various vent caps described above, Japanese Patent Application Laid-Open No. 4-95239 discloses a vent cap for ventilation shown in FIGS. The ventilation vent cap shown in FIGS. 24 and 25 provides a ventilation vent cap in which the outer wall around the mounting location of the ventilator is less likely to be soiled by exhaust air for many years and the outer wall has less traces of dirty water flowing down. For this purpose, a shielding plate 108 is provided by a stay 107 in front of the front end of a cylindrical main body tube 106 having an outward flange 105 on the outer periphery of the front end, and a louver piece 109 is inclined forward at the open front end of the main body tube 106. A guide frame 114 having a louver ventilation hole 110 projecting therefrom and a collar 113 projecting forward on the outer periphery of a semicircular frame flange 112 in the lower half of the front end of the main body cylinder 106. The frame flange 112 is fixedly attached to the flange 115 of the main body tube 106, and between the collar front edge 114 a of the guide frame 114 and the back surface of the shielding plate 108. It is intended to form the exhaust gap 116 structures.
[0006]
[Problems to be solved by the invention]
The conventional various vent caps for ventilation described above have the following problems.
In other words, conventional vent caps for various ventilations were merely studied based on unfounded images at actual sites, and were obtained by conducting accurate tests in a test room equipped with test facilities and the like. It was not designed based on data.
[0007]
Therefore, the conventional vent cap for ventilation has various shape variations and installation conditions as described above, and even if the selection and construction are examined, the conventional vent cap for ventilation is based on the main body itself. Because of the lack of image, there was a limit in preventing damage from water leakage at the construction level.
The present invention has been made in view of the above problems in the related art, and has as its object to provide a vent cap for ventilation that can minimize water leakage damage based on data obtained by an accurate test.
[0008]
[Means for Solving the Problems]
In order to prevent water leakage damage, it is necessary to consider the structure of the vent cap body provided in the part that is directly hit by rain. The present inventors performed a performance evaluation of a vent cap for ventilation based on a full-scale test, and corresponded to the vent cap of the present invention based on data obtained thereby.
That is, the vent cap for ventilation of the present invention,In a ventilation vent cap having a shielding plate provided by a support member in front of a front end of a cylindrical main body tube, the shielding plate is substantially flat, and a guide is provided from the periphery of the opening of the main body tube to the outer peripheral side of the main body tube. A cylindrical collar formed with a frame and projecting forward from the outer edge of the guide frame is characterized in that its axis coincides with the main body cylinder and its front edge is located inside the shielding plate. With such a configuration, it is possible to achieve both rain prevention performance and ventilation efficiency.
Further, the ventilation vent cap of the present invention is a ventilation vent cap in which a shielding plate is provided by a support member in front of a front end of a cylindrical main body cylinder, wherein a cylindrical collar is provided between the main body cylinder and the shielding plate. The collar is disposed so as to coincide with the axis, and the front edge of the collar is located inside the outer edge of the shield plate, and the front edge of the collar expands and projects toward the shield plate, and the extension line in the protruding direction is the shield plate. Is set to intersect withBy doing so, the ventilation through the vent cap for ventilation is performed smoothly, and the shielding by the shielding plate becomes effective,From the outside into the cylindrical body cylinderRainwater intrusion can be effectively prevented.
[0009]
In addition, by disposing a long member whose longitudinal direction is along the direction of gravity between the main body cylinder and the shielding plate, not only can insects, birds and the like intrude into the cylindrical main body cylinder, but also "indirect invasion". It is possible to prevent the problem that "rain" gradually gathers to form a large pool of water, so that the rainwater attached to the long member naturally falls along the long member and is discharged out of the main body cylinder.
Further, by making the shield plate detachable, the same or similar finish as the outer wall finish can be performed in consideration of the design, and various designs such as a round shape and a square shape can be selected. In addition, by providing an opening and closing mechanism for opening and closing the opening of the front edge of the collar by the shielding plate, it is possible to prevent the intrusion of wind into the room and the backflow of exhaust air in the case of strong wind, and to add a heat-sensing mechanism to prevent fire. At times, it is possible to prevent infiltration of a flame or spread of fire to the outside.
The opening / closing mechanism may be a mechanism using a shape memory alloy, or may be a mechanism using a thermal fuse. By doing so, a simple and maintenance-free opening / closing mechanism can be provided.
[0010]
[Action]
According to the vent cap for ventilation of the present invention, the air from the room enters the main body cylinder from the rear part and is exhausted through the collar, and the exhaust is radiated from the gap between the front edge of the collar and the shielding plate.
In addition, dust and oil collected inside the collar flow down as dirty water in rainy weather, but the dirty water flows down from the front edge of the collar that protrudes forward, so it does not flow down the outer wall surface and flows down. The wall surface can be prevented from being stained by dirty water.
Moreover, according to the vent cap for ventilation of the present invention, the front edge of the collar is located inside the outer edge of the shielding plate, so that the rain hitting the shielding plate drips and does not blow into the duct. Water intrusion can be efficiently prevented.
[0011]
【Example】
Hereinafter, examples of the vent cap for ventilation of the present invention will be described.
As shown in FIG. 1 and FIG. 2, an outward flange 2 is formed on a peripheral edge of an opening front end of a main body cylinder 1 of a vent cap for ventilation according to an embodiment of the present invention.
[0012]
A long member 3 extending in the direction of gravity indicated by an arrow Z in the figure is attached to the front end opening of the main body cylinder 1, and further, an outward flange 2 formed on the periphery of the opening front end of the main body cylinder 1 is provided. The guide frame 4 is attached. The guide frame 4 is formed by forming a cylindrical collar 6 projecting forward on the outer periphery of a frame flange 5. A base end of a support member 7 is fixedly attached to the frame flange 5, and a disk-shaped shielding plate 8 is attached to a front end of the support member 7. Therefore, the cylindrical collar 6 is disposed between the cylindrical main body cylinder 1 and the shielding plate 8 so that the axis of the cylindrical collar 6 coincides with that of the cylindrical main body cylinder 1.
That is, the guide frame 4 is formed by forming a substantially cylindrical collar 6 projecting outward from the outer periphery of a cylindrical frame flange 5 so as to expand in diameter. The guide frame 4 is attached to the outward flange 2 of the main body tube 1 so as to be sandwiched between the outer flange 2 and the outward flange 2. In such a structure, the front edge 6a of the collar 6 is set so as to be located inside the outer edge 8a of the shielding plate 8 toward the center of the shielding plate 8 in the direction of the center of the circle.
[0015]
The projecting direction of the front edge 6a of the collar 6 of the guide frame 4 indicated by the broken line X in the drawing is set to the outside of the guide frame 4, and the extension of the projecting direction X intersects the shielding plate 8. I have.
The collar 6 is formed so as to have a protruding amount such that an appropriate gap A is formed between the front edge 6a and the back surface of the shielding plate 8.
[0016]
The vent cap for ventilation according to the present invention described above is fitted and mounted in a mounting hole of a wall in a building, and a gap between the outer peripheral edge of the outward flange 2 of the main body tube 1 and the wall surface is appropriately sealed by sealing.
[0017]
Dirty air containing oil smoke and the like from the room enters the main body cylinder 1 through the rear opening 1b, and the air is exhausted forward from the front end opening of the main body cylinder 1 to which the long member 3 is attached along the direction of gravity. The exhaust is diffused from the gap A between the shielding plate 8 and the front edge 6a of the collar 6 of the guide frame 4 and diffused into the outside air, and the outer wall surface of the building to which the vent cap for ventilation is attached becomes dirty. Is prevented as much as possible.
[0018]
In addition, dust and oil accumulate on the inner surface of the guide frame 4 during use, and they flow down as dirty water when it rains. However, since the guide frame 4 projects forward from the outer wall surface, the dirty water is There is almost no flow along the surface, and the dirt around the area where the ventilation vent cap is attached on the outer wall surface is extremely reduced.
[0019]
In particular, in the ventilation vent cap of the present invention, the shielding plate 8 is formed in a circular shape, and the front edge 6a of the collar 6 is located on the inner side in the direction of the center of the shielding plate 8 with respect to the outer edge 8a of the shielding plate 8. In addition, it is possible to efficiently prevent the blowing of rain wind into the main body tube 1 by the shielding plate 8.
In addition, the positional relationship between the outer edge 8a of the shielding plate 8 and the front edge 6a of the collar 6 is set so that the extension of the front edge 6a of the collar 6 in the protruding direction X intersects the shielding plate 8. Ventilation can be performed smoothly, and the shielding by the shielding plate 8 becomes effective, so that the infiltration of rainwater into the cylindrical main body cylinder 1 from the outside can be effectively prevented. In the vent cap for ventilation according to the above-described embodiment of the present invention, not only the long member 3 can prevent insects, birds, and the like from entering the main body cylinder 1, but also the long member 3 has the front end opening of the main body cylinder 1. The rainwater attached to the long member 3 naturally falls along the long member 3 and is discharged to the outside of the main body cylinder 1 because the water is attached to the long member 3 so as to extend in the gravity direction shown by the upper arrow Z in FIG.
3 and 4 show a vent cap for ventilation according to another embodiment of the present invention. In the vent cap for ventilation of this embodiment, the shielding plate 10 is different from the previous embodiment in that the front plate 10a and the back plate 10b The back plate 10b has a hole 10c. Therefore, in the vent cap for ventilation of the present embodiment, an air flow path indicated by an arrow B in the drawing is formed in addition to the gap A, and it is possible to realize a ventilation efficiency higher than that of the vent cap for ventilation shown in the above embodiment.
5 and 6 show a vent cap for ventilation according to still another embodiment of the present invention. In the vent cap for ventilator of this embodiment, the shielding plate 8 is different from the previous embodiment through bolts and nuts 11. It is detachable from the frame flange 5. Therefore, in the ventilation vent cap of this embodiment, it is necessary to attach the shielding plate 8 having a color scheme that matches the outer wall of the building where the ventilation vent cap is provided, and to elaborate other designs on the shielding plate 8. It can be performed efficiently and at low cost.
FIG. 7 shows a vent cap for ventilation according to another embodiment of the present invention. In the vent cap for vent according to the present embodiment, a shielding plate 12 is attached to a telescopic opening / closing mechanism 14 for opening and closing an opening of a cylindrical main body cylinder 1. The expansion / contraction opening / closing mechanism 14 is attached to a fire damper mechanism 15 using a heat-sensitive fuse or a shape memory alloy. The expansion / contraction opening / closing mechanism 14 expands / contracts due to the external wind, while the fire protection damper mechanism 15 senses the temperature in the event of a fire and automatically operates based on a certain temperature by the action of a heat-sensitive fuse or a shape memory alloy. The opening of the cylindrical main body tube 1 is closed by 12.
More specifically, the spring 14a of the telescopic opening / closing mechanism 14 contracts in the direction of arrow A due to the wind pressure of a certain level or more of the external wind, whereby the shielding plate 12 attached to the telescopic opening / closing mechanism 14 moves in the direction of arrow A. The opening at the front edge of the collar is closed by the shielding plate 12. Also, when the outside wind becomes lower than a certain level, the spring 14a returns in the direction of arrow B, whereby the shield plate 12 attached to the telescopic opening / closing mechanism 14 moves in the direction of arrow B and returns to the original position, The opening at the leading edge of the collar is opened.
Further, in the event of a fire, when the shape memory alloy spring 15a of the fire protection damper mechanism 15 reaches a certain temperature or higher, the function of the shape memory alloy automatically shrinks in the direction of the arrow A. The shield plate 12 attached via the cover 14 moves in the direction of arrow A, and the opening at the front edge of the collar is closed by the shield plate 12.
When the above-described fire damper mechanism 15 is constituted by a heat-sensitive fuse, the shield plate 12 is always urged in the direction of arrow A by a spring 15a made of a normal material, and the urging force of the spring 15a is resisted. Then, the shield plate 12 is held in the state shown in the figure with the opening at the front edge of the collar opened by the holding means made of a thermal fuse (not shown). On the other hand, in the event of a fire, the holding means made of the heat-sensitive fuse of the fire protection damper mechanism 15 is melted and broken by the hot air or the heat of the flame that flows in from the outside. As a result, the spring 15a automatically contracts in the direction of arrow A, and the fire protection damper mechanism 15 The shield plate 12 attached via the telescopic opening / closing mechanism 14 moves in the direction of arrow A, and the opening at the front edge of the collar is closed by the shield plate 12.
Next, the results of performance tests of the ventilation vent cap of the embodiment of the present invention and the conventional ventilation vent cap will be described.
1. Test method and test equipment
1-1 Explanation of test method
The reason that a full-scale test has not been conducted on the performance characteristics of the vent cap for ventilation in the past is that there was no test environment capable of reproducing a place similar to the actual place. Therefore, the present applicant has a function capable of freely controlling various environments, and uses an artificial weather chamber capable of reproducing a storm such as a typhoon. The test was performed.
(1) Environmental specifications that can be created by the climate chamber used for this test and the setting conditions for this test
(1) Rainfall: max300mm → 30,60,90mm / Hr
(2) Wind speed: max 10 m / sec → 4, 7, 10 m / sec
(3) Temperature: -50 to + 60 ° C → 22 ° C
(4) Humidity: 10 to 95% RH → 50%
As shown in FIG. 8, the artificial weather chamber is divided into two zones. In this test, a heat insulation panel 23 assumed on the outer wall is provided between the zone 21 and the zone 22, and the zone 21 side is the outside and the zone 22 is the room. The wind is sent obliquely upward at an angle of 45 ° by the blower 25 while raining from the rainfall nozzle 24 on the ceiling, and directed toward four ventilation vent caps 26 arranged and mounted on the outer wall surface of the heat insulating panel 23 in the vertical and horizontal directions. And directly hit the wind and rain. On the indoor side (zone 22), transparent acrylic ducts 27, 27 are connected to the ventilation vent caps 26 and supported by a duct support base 28, and the transparent acrylic ducts 27, 27 are 1100 mm from the heat insulating panel 23. A water collecting port is provided at the point (1), one end of a water collecting hose 29 is connected to the water collecting port, and a measuring cylinder 30 is disposed at the other end of the collecting hose 29, and "rain pool" is collected by the measuring cylinder 30. To measure the amount of rainwater infiltration.
Further, two types of the transparent acryl ducts 27, 27, a straight sirocco fan 31 and a total heat exchange type ventilation fan 32, were connected to one of them through a flexible duct.
In this test using the artificial weather chamber described above, the air flow direction of the straight sirocco fan 31 was divided into three patterns of air supply, exhaust, and stop, and measurement items and measurement criteria such as the rain penetration distance and penetration amount for each pattern were set. Then, the measurement was performed. In this test, in particular, by using a transparent acrylic duct, it was possible to visually confirm and measure the mechanism of rain invasion and the distance and amount of rain infiltration.
[Device specifications used in the test]
・ All heat exchange type ventilation fan
Mitsubishi Electric: LGH-50RS 550m³/ H × 1φ × 100V × 210W
・ Straight sirocco fan
Mitsubishi Electric: BFS-18BSA 480m³/ H × 1φ × 100V × 61W
・ Vent cap
Unix Co., Ltd.
Flat type: SG-C-150, 200
Cell food: LSG-A-150, 200
Deep type: FSW-F-150, 200
Vertical blow-out type: KBS-150, 200
(2) Outline of test results
As a result of observing the rain entering the duct 27 from the vent cap 26 for ventilation, it was found that "direct infiltration rain", which directly entered without hitting the lash, etc., was stopped by the lash or mesh, etc. It turned out to be divided into "indirect infiltration rain". The “direct infiltration rain” has the same diameter as the raindrop at that time, but adheres to the pipe wall in the duct 27 in a slender manner. This is hereinafter referred to as “linear water droplet”. Since this linear state is still in its infancy, it does not lead to water leakage. However, rain hitting gully, which is generally considered to be effective, or an indispensable bird-proof net, attaches to it and grows, forming large-diameter raindrops, and as such, due to the external wind and air supply, the ducts are left as they are. 27. Such “indirect infiltration rain” further collects in the duct 27, and usually flows down to the bottom of the duct 27 at an early time to form a large water pool. This is hereinafter referred to as “rain pool”. The “rain pool” flows outward when the slope of the duct 27 is a large forward slope (outside slope). However, when the slope is slightly forward, it flows toward the indoor side when air is supplied or the outside wind is strong. It is considered that the water leaks from the sirocco fan 31 main body, the connection failure of the duct 27, and the like. Therefore, this “rain pool” is considered to be the direct cause of the water leakage damage. In the case of a vent cap 26 for ventilation that has a relatively easy structure for rain to enter, such as a conventional flat type or cell hood, the “rain pool” is connected at the bottom of the duct 27, and if there is a gap etc. run down. However, in the case of the vent cap 26 for ventilation having a structure that does not allow rain to enter, such as a deep type or a blow-through type, a small-sized “rain pool” is formed at most near the outer wall. However, when air is supplied from the ventilation vent cap 26, even if the duct 27 has a slight forward gradient, the duct 27 rises against the gradient and flows down from a gap or the like as in the connected state.
(3) Wind and rain penetration test measurement results
A. Test results with straight sirocco fan
▲ 1 ▼ In the stop state
FIG. 9 shows the measurement results of the linear water droplet penetration distance and the rainfall reaching distance of various vent caps when the external wind speed was changed to 4 m / s, 7 m / s, and 10 m / s at a rainfall of 30 mm / Hr. The linear water droplet intrusion distance tends to increase as the external wind speed increases in each shape. In particular, the flat type and cell hood reach 1000 mm or more when the external wind speed is 7 m / s or more. Further, they have a longer reach of the rain pool than other shapes, and in the flat type, the rain pool reaches the water collecting port position of 1100 mm from the wall surface when the external wind speed is 10 m / s. As a result, in comparison of the four types, it can be said that the deep type and the vertical blow-through type have shapes in which rain is less likely to enter than the flat type and the cell hood.
Compared to the above measurement results of the conventional vent cap, the vent cap of the embodiment of the present invention shows the same performance as the deep vent cap.
FIG. 10 shows the vent cap for ventilation according to the embodiment of the present invention and the conventional flat and cell hood lines when the rainfall is changed to 30, 60 and 90 mm / Hr at the external wind speeds of 4 m / s and 7 m / s, respectively. The measurement results of the water droplet penetration distance and the rainfall reach distance are shown. Looking at the influence of the external wind speed on the infiltration situation of rain in both the flat type and the cell hood shape, the linear water droplet infiltration distance and the rainfall reach distance increase as the external wind speed increases. On the other hand, when looking at the influence of the amount of rainfall on the infiltration situation of rain of both shapes, the effect on the linear water droplet infiltration distance is small, but when the external wind speed is 7 m / s, the rainfall reach distance increases as the amount of rainfall increases. Extending.
On the other hand, in the vent cap for ventilation according to the embodiment of the present invention, there is no rain pool, and the distance of linear water drop penetration is smaller than that of other vent caps.
FIG. 11 shows the amount of rain penetration of various vent caps when the outside wind speed is 10 m / s, the rainfall amount is 90 mm / Hr, and the sirocco fan is a long stop member. As shown in the figure, there was a difference in the amount of rain infiltration depending on the shape, and the flat type was recognized much more than others. In contrast, it can be seen that the vent cap for ventilation according to the embodiment of the present invention has a smaller amount of rain infiltration than the other vent caps.
▲ 2 ▼ In case of intake
FIG. 12 shows the measurement results of the water collection amount of each ventilation vent cap when the sirocco fan is in the intake state and the rainfall amount is set to 90 mm / hr. As shown in the figure, the flat type can collect water of 630 ml or more, and the cell hood and the deep type can collect water of about 170 to 180 ml. Low water volume.
B. Test results with a total heat exchange type ventilation fan
▲ 1 ▼ In case of intake
FIG. 13 shows the linear water droplet penetration distance and the rainfall reaching distance of various vent caps when the external wind speed is changed to 4 m / s, 7 m / s, and 10 m / s at a rainfall of 30 mm / h. In the case of the deep type and the vertical type, the effect of the external wind speed on the linear water droplet infiltration distance can be seen, but in other cases, the total length of the acrylic duct reaches 2000 mm, which is a measurement limit where the effect of the external wind speed cannot be compared. On the other hand, the rainfall reaching distance reaches the water collecting port position of 1100 mm from the wall surface regardless of the size of the external wind speed in each shape. In particular, in the case of the flat type, when the external wind speed was 7 m / s and 10 m / s, a rain pool was formed beyond the water collecting port, and it was confirmed that the rain reached the detection limit of 2000 mm in the duct.
On the other hand, the vent cap for ventilation according to the embodiment of the present invention shows better performance in both the linear water droplet infiltration distance and the rainfall reach distance as compared with other vent caps.
FIG. 14 shows rain infiltration amounts of various vent caps when the external wind speed is changed to 4 m / s, 7 m / s, and 10 m / s at a rainfall amount of 30 mm / Hr. The amount of rain infiltration increases in proportion to the external wind speed in all shapes, and in particular, the flat type and the cell hood are larger than the deep type and the vertical type. Also, the reason that the cell hood is larger than the flat type is that, other than the shape that the hood takes in rain from below, it is not possible to measure the rain pool beyond the water intake during the flat type test It is also possible.
On the other hand, in the vent cap for ventilation according to the embodiment of the present invention, the amount of rain infiltration is smaller than the other vent caps at any wind speed.
(2) In case of exhaust
FIG. 15 shows the linear water droplet penetration distance and the rainfall reaching distance of various vent caps when the rainfall amount is changed to 30 m / Hr and 90 mm / Hr at an external wind speed of 10 m / s. The linear water droplet infiltration distance was 1000 mm or less irrespective of the size of the external wind speed in each shape, and was not measured particularly in the vertical blow-through type. On the other hand, the rainfall reach distance was measured up to around 400 mm in the flat type, but was not measured in other cases.
On the other hand, in the vent cap for ventilation according to the embodiment of the present invention, the linear water droplet infiltration distance and the rainfall reach distance are smaller than those of other vent caps at any rainfall.
(4) Examination of test results
(1) In the case of a vent cap that comes with a horizontal gully or a mesh, the rain that hits that part collects and creates large water droplets, which are drawn down into the duct side while falling down, or pushed by the wind Come in. It has been found that the amount of infiltration due to this phenomenon is the largest factor in terms of quantity.
(2) Similarly, rain that falls on the surface of a hood, such as a cell hood, other than a horizontal gully or a mesh, becomes a large water droplet while falling down the hood surface, and is sucked into the duct when it drip from the end The phenomenon also turned out to be a major factor.
{Circle over (3)} Rain particles rolled up by a strong wind blowing from below will be pushed up as the particle size becomes smaller. For this reason, if rain enters from diagonally below, such as a cell hood, the hood will prevent the rain from going, and eventually, all the rain that has no place to go to will enter the duct, and the existence of the hood will It turned out to be counterproductive.
(4) In the case of the deep type, the flat type has both the flat type and the disadvantage of the cell hood due to the structure that eliminates the place where rain from below goes and the entrance with either a gull or a mesh, so the flat type Although the performance is better than that of the cell hood, the problem remains because it has disadvantages.
However, the vent caps for ventilation according to the examples of the present invention were able to overcome the various problems described above, and demonstrated that they exhibited good characteristics under various conditions.
【The invention's effect】
As described above, according to the vent cap for ventilation of the present invention, in the vent cap for ventilation formed by providing a shielding plate by a support member in front of the front end of the cylindrical main body cylinder, between the cylindrical main body cylinder and the shielding plate Since the cylindrical collar is disposed so that the axis of the cylindrical main body cylinder coincides with the axis of the cylindrical main body, the outer wall surface around the mounting location of the ventilator is less likely to be contaminated by the exhaust air, and a trace of the flow of dirty water remains. The appearance of the outer wall surface can be maintained for many years.
In addition, since the front edge of the collar is located inside the outer edge of the shielding plate, it is possible to provide excellent rainproof performance with respect to storms or rain that enters during a typhoon.
In general, the better the rainproof performance, the larger the outer shape of the hood and the like, while the vent cap for ventilation of the present invention is smart in design and has a shape with little presence on the outer wall.
Further, while the rainproofing performance and the ventilation efficiency (pressure loss) generally tend to be inversely proportional, the ventilation vent cap of the present invention achieves both of them, and for example, has a higher pressure than the conventional blow-through type. Loss is small, and sufficient rain-proof performance is obtained.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a vent cap for ventilation according to an embodiment of the present invention.
FIG. 2 is a front view of the vent cap for ventilation of the embodiment shown in FIG.
FIG. 3 is a longitudinal sectional view of a vent cap for ventilation according to another embodiment of the present invention.
FIG. 4 is a front view of the vent cap for ventilation of the embodiment shown in FIG. 3;
FIG. 5 is a longitudinal sectional view of a vent cap for ventilation according to still another embodiment of the present invention.
FIG. 6 is a front view of the vent cap for ventilation of the embodiment shown in FIG. 5;
FIG. 7 is a longitudinal sectional view of a vent cap for ventilation according to still another embodiment of the present invention.
FIG. 8 is an artificial weather chamber used for testing the rainproof performance and the like of the vent cap for ventilation according to one embodiment of the present invention.
FIG. 9 shows the results of a rainproof performance test of a vent cap for ventilation according to one embodiment of the present invention.
FIG. 10 shows the results of a rainproof performance test of a vent cap for ventilation according to one embodiment of the present invention.
FIG. 11 shows the results of a rainproof performance test of a vent cap for ventilation according to one embodiment of the present invention.
FIG. 12 shows the results of a rainproof performance test of a vent cap for ventilation according to one embodiment of the present invention.
FIG. 13 shows the results of a rainproof performance test of a vent cap for ventilation according to one embodiment of the present invention.
FIG. 14 shows the results of a rainproof performance test of a vent cap for ventilation according to one embodiment of the present invention.
FIG. 15 shows the results of a rainproof performance test of a vent cap for ventilation according to one embodiment of the present invention.
FIG. 16 is a longitudinal sectional view of a conventional flat ventilation vent cap.
FIG. 17 is a front view of the flat ventilation vent cap shown in FIG. 16;
FIG. 18 is a longitudinal sectional view of a conventional cell food type vent cap for ventilation.
19 is a front view of the self-venting vent cap shown in FIG. 18;
FIG. 20 is a longitudinal sectional view of a conventional vent cap for deep ventilation.
FIG. 21 is a front view of the vent cap for deep ventilation shown in FIG. 20;
FIG. 22 is a longitudinal sectional view of a conventional vent-type vent cap for ventilation.
FIG. 23 is a bottom view of the ventilating vent cap shown in FIG. 22;
FIG. 24 is a longitudinal sectional view of a conventional vent cap for ventilation.
FIG. 25 is a front view of the vent cap for ventilation shown in FIG. 24;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Main body cylinder, 3 ... Long member, 6 ... Collar, 7 ... Support member, 8 ... Shielding plate, 6a ... Collar front edge, 8a ... Shielding plate outer edge .

Claims (7)

In a vent cap for ventilation formed by providing a shielding plate by a support member in front of the front end of the cylindrical main body cylinder,
The shielding plate is substantially flat,
A guide frame is formed from the periphery of the opening of the main body cylinder to the outer peripheral side of the main body cylinder,
Cylindrical collar which is formed to protrude forward from the outer edge of the guide frame, ventilation vents to match the main body tube and the shaft center, and its front edge, characterized in that located inside the the shielding plate cap. In a vent cap for ventilation formed by providing a shielding plate by a support member in front of the front end of the cylindrical main body cylinder,
A cylindrical collar is arranged between the cylindrical main body cylinder and the shielding plate so that the main body cylinder and the axial center thereof are aligned, and the front edge of the collar is located inside the outer edge of the shielding plate,
Ventilation vent cap, characterized in that the collar front edge extension line of the protruding direction protrudes diametrically enlarged toward the shield plate is set so as to intersect the shielding plate. The vent cap for ventilation according to claim 1 or 2, wherein a long member is arranged between the main body cylinder and the shielding plate, and a longitudinal direction of the long member is set along a direction of gravity. The vent cap for ventilation according to claim 1, wherein the shield plate is detachable. The vent cap for ventilation according to any one of claims 1 to 4, further comprising an opening / closing mechanism that opens and closes an opening portion of the front edge of the collar with the shielding plate. 6. The vent cap for ventilation according to claim 5, wherein the opening / closing mechanism is a mechanism using a shape memory alloy. The ventilation vent cap according to claim 5, wherein the opening / closing mechanism is a mechanism using a thermal fuse.

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