KR102592130B1 - Hood cap for prevent headwinds - Google Patents

Abstract

The present invention uses Bernoulli's principle to increase the flow rate of external air to induce upward discharge of indoor air to enable rapid discharge, and provides a backwind prevention hood cap whose structure itself is manufactured to be unaffected by backwinds. there is.
The above object of the present invention is a cylindrical or semi-cylindrical hollow pipe, including a horizontal communication pipe for duct connection,
An expansion pipe communicating with the horizontal outlet of this horizontal communication pipe, a neck pipe extending from the top of the horizontal discharge port to the top of this expansion pipe and narrowing upward, a vertical guide pipe forming a narrowing pipe extending to the discharge port of this neck pipe, and It has a streamlined guide surface disposed with a maximum convex curvature toward the horizontal outlet of the horizontal communication pipe on the opposite side of the vertical plate surface, and includes an induction partition plate that partitions the expansion pipe and the neck pipe of the vertical induction pipe,
The outside air flowing in from the lower part of the expansion pipe and flowing into the reduction pipe is accelerated into a fast air flow by the streamlined guide surface of the maximum convex curvature, pulling the indoor air discharged from the horizontal outlet of the horizontal communication pipe upward and discharging quickly. This can be achieved by using a backwind prevention hood cap that is designed to fundamentally block the inflow of backwinds by making the outside circular.

Description

Hood cap for prevent headwinds}

The present invention relates to a hood cap installed on the exterior wall of a building when indoor air in an apartment or house is ventilated to the outdoors. More specifically, it relates to indoor air that is exhausted by increasing the flow rate of the outside air using Bernoulli's principle. It relates to a backwind prevention hood cap that doubles the flow upward and allows exhaust, and structurally prevents backwind.

Generally, the hood cap is connected to a duct connected to the outdoor side of the building and is used to ventilate indoor polluted air. However, in reality, when there is a strong headwind from the outside, it flows back into the room or causes a resonance phenomenon with the wind from the internal blower. It has the drawback of generating noise indoors.

This hood cap is mounted on a ventilation hole installed on the wall of a building and has a horizontal communication pipe inserted into a duct that communicates with the inside and the outside, and an exhaust passage is formed at equal intervals at the end of this horizontal cylindrical pipe, and a windbreak plate is installed on the support connection piece disposed. It is installed or has a structure in which a shielding plate with a semicircular cut is formed at the bottom of a circular cap.

The hood cap of this structure affects the exhaust flow caused by the hood cap when rain or wind blows, causing it to flow backwards and flow in through the flue duct, causing overload on the internal equipment (exhaust fan), causing indoor noise, shortened lifespan, and leakage. was pointed out.

Patent Documents 1 to 5 have been disclosed to solve these problems.

In Patent Document 1, it consists of a main body having inflow prevention wings inclined toward the outside to prevent wind from flowing back into the duct from the outside, and a cover that blocks the flow path formed in the center of the main body to form a detour from the outside. We provide a waterproof ventilation cap that not only prevents air from flowing back inside to ensure efficient ventilation, but also prevents rainwater from flowing back from the outside.

In Patent Document 2, a backwind prevention hood cap with a backwind prevention curtain installed inside the hood cap to allow indoor air to be discharged smoothly while effectively blocking the inflow of outside air and rainwater was disclosed.

In Patent Document 3, the ventilation cap is improved to a structure that can reduce air resistance, thereby minimizing interference from external wind pressure, reducing noise generation, preventing a decrease in ventilation efficiency, and maximizing indoor air exhaust performance. A technology has been disclosed.

In Patent Document 4, the position of the tip of the backwind blocking pipe installed inside the ventilation pipe is positioned forward of the ventilation hole formed in the ventilation pipe, so that the outside air flowing into the ventilation pipe is blocked by the backwind blocking pipe and is blocked from flowing inside, and is blocked to the outside. A hood cap for preventing backwinds that can prevent backwinds of air has been disclosed.

1. Korean Patent No. 10-1543603 (registered on August 5, 2015) 2. Korean Patent Publication No. 10-2018-0089028 (published on August 8, 2018) 3. Korean Patent No. 10-1954419 (registered on February 26, 2019) 4. Korean Patent No. 10-2067180 (registered on January 10, 2020)

In Patent Document 1, the backflow prevention inflow prevention wing formed on the cap body prevents rainwater from flowing back inside, but the strong wind blowing outside blocks the flow of air discharged from the exhaust port and flows in, overloading the internal equipment. Disadvantages still remain, and the complex cover structure increases manufacturing costs.

Taking this into account, Patent Document 2 adopts a backwind prevention membrane, but when used for a long period of time, the backwind prevention membrane needs to be replaced due to a blinding phenomenon, and the complicated structure cannot be solved.

In addition, Patent Document 3 shows that the external wind caused by the blocking cover is guided to the backflow prevention section formed in the center along the slope of the discharge guide surface and the discharge guide port, and a venturi effect is exerted to increase the wind speed so that the wind is forcibly discharged in the opposite direction from which it was introduced, thereby causing backflow. Prevention of this phenomenon has been sought, but the central backflow prevention space is expanded in the case of rapid outdoor air, so it has the disadvantage of failing to take into account the phenomenon of backflow overcoming the pressure of the discharged indoor air.

In addition, Patent Document 4 adopts a backwind blocking pipe that protrudes along the same line as the connecting pipe, but this also has the disadvantage of causing exhaust air to flow backwards when the wind speed of the outside air is strong, thereby creating a load on the internal equipment.

The present invention was developed to solve the disadvantages of the prior art as described above. The present invention was developed to accelerate and discharge the polluted air discharged from a horizontal communication pipe extending indoors by the increased gas velocity of the outdoor air flowing in from the vertical direction. It is a device that guides the outside air that flows in from the lower part of the vertically communicating expansion pipe and flows to the upper reduction pipe into a fast air flow by the streamlined guide surface with the maximum convex curvature, thereby directing the indoor air discharged from the horizontal outlet of the horizontal communication pipe. The goal is to provide a backwind prevention hood cap that is pulled upward to encourage rapid discharge, while the outer surface is circular to effectively block backwind inflow to maximize backwind prevention and allow internal air to be discharged quickly.

The backwind prevention hood cap of the present invention to achieve the above object is,

A hollow cylindrical horizontal communication pipe for duct connection;

A vertical guide pipe forming an expansion pipe communicating with the horizontal outlet of the horizontal communication pipe, a neck pipe extending from the top of the horizontal discharge port to the top of the expansion pipe and narrowing upward, and a narrowing pipe extending to the discharge port of the neck pipe; and,

It has a streamlined guide surface disposed with a maximum convex curvature toward the horizontal outlet of the horizontal communication pipe on the opposite side of the vertical plate surface, and includes an induction partition plate that vertically divides the extension pipe and the neck pipe of the vertical induction pipe,

In the process where the air flowing in from the lower part of the expansion pipe flows to the upper part of the reduction pipe, the indoor air discharged from the horizontal outlet of the horizontal communication pipe is changed into a fast air flow by the streamlined guide surface with the maximum convex curvature in the middle, and is guided and discharged upward. The structure is designed so that the stronger the wind outside, the faster the internal air is discharged.

In the present invention, the induction partition plate is partitioned outside the inlet of the vertical induction pipe and extends inside the inlet of the narrowing pipe beyond the outlet of the neck pipe, and the convex curvature of the streamlined induction surface of the outlet end of the horizontal outlet and the back of the Due to the deviation of the gas flow of the vertical and horizontal plates, the gas flow of the convex curvature of the streamlined guide surface becomes relatively fast, leading to the internal air of the horizontal outlet to escape quickly, thereby doubling the air flow speed and discharging in the first order, and at the same time, the neck pipe It is characterized in that it is discharged by inducing a secondary fast air flow due to the difference in suction amount between the cross-sectional areas of the outlet and the lower expansion pipe.

According to the present invention, the ventilation air is dragged by the outside air, rises, and is discharged through a vertical induction pipe that can use the Bernoulli principle, and prevents direct wind from outside. Rather, the stronger the draft, the faster the indoor polluted air is discharged. It is made with a flow structure, and can reduce noise and breakdowns caused by headwinds of internal equipment installed indoors.

In addition, according to the present invention, it has a simple structure and can be assembled and used in the exhaust duct of a building, ensuring versatility, industrial mass production effects can be expected, and the structure is simpler than existing products, reducing the cost. Savings are possible.

In addition, according to the present invention, there is an advantage that ventilation of the internal air can be stably achieved by using the flow of external air without a separate device and there is no risk of breakdown.

Figure 1 is a perspective view of a first embodiment of the present invention.
Figure 2 is a half-sectional perspective view showing the internal structure of Figure 1.
Figure 3 is a longitudinal cross-sectional view of Figure 1.
Figure 4 is an operational diagram showing air flow according to installation of the first embodiment of the present invention.
Figures 5 and 6 are a half cross-sectional perspective view and a longitudinal cross-sectional view of the second embodiment of the present invention.
Figure 7 is a longitudinal cross-sectional view of the rainwater blocking cover installed in the third embodiment of the present invention.
Figures 8 and 9 are a perspective view and a longitudinal cross-sectional view of a fourth embodiment of the present invention.
Figure 10 is a perspective view of a fifth embodiment of the present invention.
Figures 11 and 12 are a bottom perspective view and a plan cross-sectional view of the sixth embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

(First Example)

Figure 1 is a perspective view of a first embodiment of the present invention, Figure 2 is a half-sectional perspective view showing the internal structure of Figure 1, and Figure 3 is a longitudinal cross-sectional view of Figure 1.

Figure 4 is an operational diagram showing the air flow according to the installation of the first embodiment of the present invention. Referring to these drawings, it is installed within the outer wall 100 of the house to provide ventilation for the indoor 200 and the outdoor 300. A horizontal communication pipe (10) is inserted by inserting the side of the horizontal inlet (10a) into the duct (400) communicating with the duct, a vertical induction pipe (20) is erected in the vertical direction and communicates with this horizontal communication pipe, and the interior of this vertical induction pipe is divided. It is configured to be provided with an induction partition plate (30).

The vertical guide pipe 20 has an expansion pipe 21 that communicates with the horizontal outlet 10b of the horizontal communication pipe 10 in a vertical direction, and extends upward from the top of the horizontal outlet 10b to the top of this expansion pipe. A neck pipe 22 is formed that is reduced to, and a reduction pipe 23 is formed that extends to the discharge port 22b of this neck pipe.

This vertical guide pipe 20 has a hollow expansion pipe 21 having an inlet 21a and an outlet 21b, an inlet 22a having the same diameter as the expansion pipe, and extends outward in a protruding and curved state. The hollow neck pipe 22 having an outlet 22b on the upper side, the hollow narrowing pipe 23 having an inlet 23a and an outlet 23b having the same diameter as the outlet 22b of the neck pipe. is formed

At this time, the diameter of the expansion pipe 21 is formed to be larger than the diameter of the horizontal communication pipe 10, so that the diameter of the outlet 10b of the horizontal communication pipe 10 penetrates on one side and the horizontal communication pipe 10 is formed by welding, etc. and the vertical guide pipe 20 are fixed at right angles to each other.

The induction partition plate 30 is attached to partition the vertical induction pipe 20 in the vertical direction.

The guide partition plate 30 is formed of a vertical flat surface 32 on one side and a streamlined guide surface 31 having a convex curvature 31a that protrudes convexly from the bottom to the top on the other side, and this streamlined guide surface ( 31) is formed to extend from the upper side to a parallel plate surface 31b extending parallel to the vertical plate surface 32.

In this induction partition plate 30, the maximum convex curvature 31a of the streamlined induction surface 31 is disposed toward the horizontal outlet 10b of the horizontal communication pipe 10, and the parallel plate surface 31b is located on the neck pipe ( It is attached by dividing the expansion pipe 21 and the neck pipe 22 of the vertical guide pipe 20 in a state that extends inside the inlet 23a of the reduction pipe 23 beyond the outlet 22b of the 22).

According to the first embodiment, which is a preferred embodiment of the present invention, contaminated air in the room 200 flows into the inlet 10a of the horizontal communication pipe 10 through the duct 400 and is discharged through the outlet 10b.

Of course, such emissions are discharged by being forcibly blown by an exhaust fan (not shown) of the internal equipment.

The contaminated air discharged in this way is guided and discharged upward by the vertical guide pipe (20).

That is, it flows in through the inlet 21a of the expansion pipe 21 and flows through the outlet 21b and the inlet 22a of the neck pipe 22 → outlet 22b → the inlet 23a of the reduction pipe 23. →It is discharged through the outlet (23b).

This upward discharge due to the flow of external air is a venturi effect caused by the neck pipe 22, which is a curved pipe in which the shape of the vertical induction pipe 20 is reduced by the expansion pipe 21 at the bottom and the reduction pipe 23 at the top. Although it is possible to prevent backwinds, the present invention can completely block backwinds from flowing into the outlet (10b) of the horizontal communication pipe (10) by using the induction partition plate (30) provided vertically.

That is, there is no difference between the external air flowing through the vertical induction pipe 20 and the external air flowing in the space on the side of the vertical flat surface 32 of the induction partition plate 30 as the same air flow as described above. The contaminated air discharged from the outlet (10b) of the horizontal communication pipe (10) is dragged upward by a faster air flow due to the streamlined guide surface (31) with the maximum convex curvature (31a) at the outlet (10b) of the communication pipe (10). It is discharged quickly (Bernoulli principle effect).

Specifically, the induction partition plate 30 is partitioned outside the inlet 21a of the expansion pipe 21 of the vertical induction pipe 20, and the reduction pipe above the outlet 22b of the neck pipe 22. It extends inside the inlet (23a) of (23) and is discharged by first increasing the air flow speed at the reduced gap (W1) between the outlet end of the horizontal outlet (10b) and the convex curvature of the streamlined guide surface (31), and at the same time, the neck Contaminated air is quickly discharged by inducing a secondary fast air flow at the reduced gap (W2) between the parallel plate surface (31b) that divides the outlet (22b) of the pipe (22) and the inlet (23a) of the reduction pipe (23). The gas flow diagram is such that the contaminated air discharged from the outlet (10b) of the horizontal communication pipe (10) is pulled upward by being combined with the discharged air on the side of the vertical flat surface (32) in the reduction pipe (23) and discharged. It is formed and the inflow of headwind is automatically blocked.

(Second Embodiment)

In the second embodiment, as shown in FIGS. 5 and 6, rainwater or moisture droplets flow inward to the inner peripheral surface of the upper end of the outlet (10b) of the horizontal communication pipe 10 of the first embodiment shown in FIGS. 1 to 4. To prevent this, a water blocking prevention protrusion plate (11) is constructed.

In this embodiment, when indoor air, outside air, or rainwater flows down the inner peripheral surface of the reduction pipe 23 and the neck pipe 22, the water droplets formed by the water blocking prevention protrusion plate 11 are induced to fall. This can block the inflow into the outlet (10b).

(Third Embodiment)

As shown in FIG. 7, the third embodiment is constructed by assembling a rainwater blocking cover 40 on the outlet 23b of the reduced pipe 23 of the vertical guide pipe 20.

In this third embodiment, external rainwater is blocked by the roof of the rainwater blocking cover 40, thereby preventing inflow into the vertical guide pipe 20.

It is obvious that the discharged air discharged through the vertical induction pipe 20 according to this embodiment is diverted downward by the roof of the rainwater blocking cover 40 and is finally discharged, and it will be fully understood even if a detailed description is omitted.

(Example 4)

In the fourth embodiment, as shown in FIGS. 8 and 9, the expansion pipe 21 of the vertical induction pipe 20 has an expansion inlet cut in the vertical plate surface 32 of the induction partition plate 30. (21c), and has a semi-cylindrical shape on the vertical flat surface 32 side and a square cylinder shape on the streamlined guide surface 31 side to facilitate close installation on the vertical outer wall 100. " An expanded inlet (21c) of a flat cross-sectional shape is formed, and it is formed by forming a plurality of V-shaped vertical gas flow guide grooves (32a) protruded at regular intervals in the vertical direction to accelerate the gas flow. .

In this embodiment, the air flow of the vertical flat surface 32 is accelerated by the division of the induction partition plate 30 and the air flow is accelerated by the plurality of V-shaped gas flow longitudinal induction grooves 32a and the air flow is further accelerated. Inflow can be increased

(Example 5)

As shown in FIG. 10, the fifth embodiment has a semi-cylindrical shape on the vertical flat surface 32 side and a square cylindrical shape on the streamlined guide surface 31 side to facilitate close installation on the vertical outer wall 100. semi-cylindrical " The extension pipe 21 of the vertical induction pipe 20 has a flat cross-sectional shape of the shape of an extension portion 24 that accommodates the lower end of the induction partition plate 30, and this extension portion includes the inlet 21a. The air inlet openings 24a communicating with are formed through the air inlet openings 24a at equal intervals.

In this embodiment, the flow is induced as air flows in from the air inlet opening (24a) penetrating the extension portion (24) in cooperation with the inlet (21a) while blocking exposure of the lower end of the induction partition plate (30). There is no significant difference between the example and the effect.

(Example 6)

In the sixth embodiment, as shown in FIGS. 11 and 12, the vertical guide pipe 20 is formed into a semi-cylindrical shape as in the fourth embodiment and FIG. 5. "The streamlined guide surface 31 of the guide partition plate 30, which is formed in a flat cross-sectional shape and vertically divides it, is streamlined downward at both ends to facilitate gas flow to the left and right with the maximum convex curvature at the center as the peak. As a result, the curvature can be gradually reduced so that the end is flush with the parallel plate surface (31b).

This embodiment can provide more smooth gas flow by gradually reducing the curvature of both sides of the maximum convex curvature 31a of the streamlined guidance surface 31 like the cross-sectional shape of an airplane wing.

Above, embodiments according to the present invention have been described. However, the present invention is not limited to the above-described embodiments, and may be implemented with various modifications without departing from the technical concept of the present invention.

For example, in the above-described embodiment, it is possible to configure the streamlined guide surface 31 of the guide partition plate 30 to face both the upper and lower sides, or it can also be configured as an asymmetric streamlined guide surface.

As such, in the detailed description of the present invention, specific embodiments have been described, but of course, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the claims and equivalents as well as the claims described later.

The backwind prevention hood cap of the present invention is installed on a duct communicating with the exterior wall of a building, and is useful as a safety measure to prevent fires and noise by eliminating overload of internal facilities by preventing backflow caused by drafts as well as appearance.

10: Horizontal communication pipe 11: Water blocking prevention projection plate
20: vertical guide pipe 21, 21a: expansion pipe
22: neck pipe 23: narrow pipe
30: guidance partition plate 31: streamlined guidance surface
31a: Maximum convex curvature 31b: Parallel plate surface
32: Vertical flat surface 32a: V-shaped vertical gas flow guide groove
40: Rainwater blocking cover

Claims (8)

A horizontal communication pipe (10) made of a cylindrical hollow pipe connected to the horizontal inlet (10a) of the duct (400) installed to communicate with the outdoors on the exterior wall (100) of the house for indoor ventilation, and the horizontal communication pipe (10) It consists of a connection structure of vertical induction pipes (20) that are erected and fixed in a vertical direction parallel to the outer wall (100) to communicate and form an air flow by natural convection,
The vertical induction pipe 20 has an inlet 21a and an outlet 21b, a hollow expansion pipe 21 connected to a horizontal communication pipe 10 on one side, and an inlet 22a having the same diameter as the expansion pipe. It has a hollow neck pipe 22 that protrudes and extends in a reduced state from the top of the horizontal outlet 10b toward the upper side and has an outlet 22b on the upper side, and an inlet having the same diameter as the outlet 22b of the neck pipe. (23a) and an outlet (23b), a hollow reduced pipe (23) connected to the top of the rainwater blocking cover (40) sequentially extends upward, and the expansion pipe (21) and the neck pipe (22) The lower end protrudes outside the inlet (21a) to divide the inside of the tube in the vertical direction, and the upper end extends to the inside of the inlet (23a) of the reduction tube (23), and has a streamlined guide surface (31) and a vertical flat surface (32). A partition plate 30 is installed,
The induction partition plate 30 has a vertical flat surface 32 on one side and a streamlined induction section on the other side with a maximum convex curvature 31a that protrudes convexly toward the horizontal outlet 10b of the horizontal communication pipe 10 while going from the bottom to the top. A surface 31 is formed, and a parallel plate surface 31b extending parallel to the vertical plate surface 32 is formed on the streamlined guide surface 31,
The expansion pipe 21 is cut on one lower side to form an expansion inlet 21c exposing the vertical plate side of the induction partition plate 30,
The outside air is primarily air at the reduced gap (W1) between the outlet end of the horizontal outlet (10b) formed by the streamlined guide surface (31) with the maximum convex curvature (31a) and the maximum convex curvature (31a) of the streamlined guide surface (31). It is discharged by increasing the flow speed, and at the same time, a secondary fast air flow is induced in the reduced gap (W2) between the outlet (22b) of the neck pipe (22) and the inlet (23a) of the reduction pipe (23), thereby causing horizontal air flow with fast air flow. A backwind prevention hood cap, characterized in that indoor air discharged from the horizontal outlet (10b) of the communication pipe (10) is pulled upward and discharged quickly.
delete delete delete delete delete delete According to paragraph 1,
The streamlined guiding surface 31 of the guiding partition plate 30 has the maximum convex curvature 31a in the center as its peak, and the curvature gradually decreases in a downward streamline shape to both ends on the left and right, so that the height of the parallel plate surface 31b is reached at the ends. A backwind prevention hood cap characterized by consisting of.

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