KR20240079738A - Exhaust hood cap for headwind protection - Google Patents

Abstract

The exhaust hood cap for preventing backwind according to the present invention forms a backwind stopper that protrudes in one direction to block the part where outside wind flows in, blocks outside wind from flowing into the piping section, and expands the area on the inner surface of the backwind stopper. By forming an air induction slope inclined at a predetermined angle, the direction of exhaust air discharged from the inside can be directed to the outside, which has the effect of increasing exhaust efficiency.

Description

Exhaust hood cap for headwind protection }

The present invention relates to an exhaust hood cap for preventing backwinds, and more specifically, to a backwind stopper that protrudes in one direction to block draft air from flowing into the piping section, and to guide the exhaust air in an outward direction. It relates to an exhaust hood cap for preventing backwinds that expands the inner side of the hood.

In general, ventilation facilities are installed to protrude through the exterior wall (W) of the building so that indoor air from kitchens and bathrooms can be exhausted individually for each home, and are connected to the exhaust duct (D) that communicates with the room to ventilate the kitchen and bathroom. An exhaust hood cap 1 is installed to discharge polluted indoor air such as in a bathroom to the outside, and this installation structure is as shown in FIG. 1.

According to Domestic Registered Utility Model Publication No. 20-0201440 (Patent Document 1) regarding such a conventional exhaust hood cap, the inclined surface of the outer cover forms an end line on one side of the round protruding protrusions, and at the same time points toward the internal space. Regarding the exhaust hood cap, which is curved to allow for indentation and forms several ventilation holes, and guide vanes extending into the inner space between these ventilation holes are formed diagonally, making manufacturing simple and easy, and ensuring convenience in the process. The technology has been announced.

In addition, according to Domestic Patent Publication No. 10-1197155 (Patent Document 2) regarding another conventional exhaust hood cap, in order to form a vent cap, the head part and the body are not manufactured and combined separately, but a single metal plate is used. We have announced a technology for manufacturing a ventilation cap and a ventilation cap that can shorten the manufacturing process and reduce manufacturing costs by sequentially manufacturing the head and body.

However, looking at the contents of the conventional patent document 1, there is a problem that the flow or discharge of air current is not smooth as the ventilation hole through which indoor air is discharged is directed downward and the ventilation hole is formed between the inclined planes, and the wind generated from outside If it was generated from below, a problem occurred where the discharged air would flow backwards toward the room.

In addition, looking at the contents of the conventional patent document 2, it can be seen that the head portion formed of the through hole through which the airflow is discharged is directed downward, which has the effect of blocking the inflow of rainwater, but the flow of airflow is limited and external wind pressure is generated downward. In this case, there is a problem in which the discharge of airflow is not smooth.

Meanwhile, in order to solve this problem, conventionally, as shown in FIGS. 1 and 2, a hole is not formed in one direction to allow smooth discharge of air flow, but rather a gap is set so that the discharge air flow can be discharged up, down, left and right, that is, in all directions. An exhaust hood cap (1) equipped with a disc-shaped cover (C) spaced apart has been developed and is being used.

However, the conventional exhaust hood cap also had a problem in that the air flow discharged through the draft generated from the outside was blocked or reduced, resulting in a significant decrease in the exhaust air volume and exhaust efficiency.

Here, as seen in the graph of FIG. 2, depending on the intensity of the exhaust discharged from the inside, that is, the number of stages of the range hood, in the case of a 3-stage range hood, the exhaust air volume satisfies the KS standard (270 m/h), but in the case of a 1-stage range hood, it almost meets the KS standard. When a typhoon or gust of wind occurs nearby, the existing exhaust hood cap has the problem of not meeting the KS standards.

As such, the conventional exhaust hood cap has a problem in which ventilation efficiency is significantly reduced due to changes in external wind pressure, and many companies are researching and developing solutions to this problem.

The present invention was created to solve the problems of the prior art as described above. The purpose of the present invention is to block drafts from flowing into the piping section by forming a backwind stopper protruding in one direction to block drafts from entering. , An exhaust hood for preventing backwinds that can increase exhaust efficiency by forming an air induction slope inclined at a predetermined angle to expand the area on the inner surface of the backwind bump, so that the exhaust air discharged from the inside can be directed to the outside. A cap is provided.

The exhaust hood cap for preventing backwind according to the present invention to achieve the above object is mounted on the end of a pipe connected to a range hood or ventilation outlet to exhaust indoor air and block external wind at the same time, and is installed on the exterior wall of a building to prevent backwind. It consists of a pipe-shaped connection pipe connected to the end of the pipe as an exhaust hood cap, a seating flange extending outward on one side of the connecting pipe to be in close contact with the outer wall, and a plurality of bolt fastening holes penetrating forward and backward on one side of the seating flange. A piping department consisting of; a disc-shaped cover main body disposed at a predetermined distance in front of the piping unit, a draft blocking wall extending from the edge of the cover main body in the direction of the piping unit, and formed on one surface of the cover main body to communicate with the bolt fastening hole. A cover portion consisting of a cylindrical bolt seating port; It is characterized in that it is composed of a ring-shaped backwind blocking portion protruding forward on one surface of the seating flange to block drafts flowing in between the seating flange and the draft blocking wall.

The headwind blocking portion is characterized by being composed of a ring-shaped headwind guard protruding in the direction of the cover portion, and an air inducing slope inclined at a predetermined angle so that the inner surface of the headwind guard is expanded on the inner surface of the headwind guard.

The outer peripheral surface of the draft blocking wall is characterized in that a draft movement guide surface curved inward of the draft blocking wall is formed so as to change the direction of the draft moving between the draft blocking wall and the backwind blocking portion by pressing it in the direction of the outer wall.

A return guide surface curved at a predetermined radius is formed on the outer peripheral surface of the headwind blocking portion to return the direction of draft flowing in through the outer wall.

As such, the exhaust hood cap for preventing backwind according to the present invention has the following effects.

First, by forming a backwind stopper that protrudes in one direction to block the part where draft air flows in, it is possible to block draft wind from flowing into the interior of the piping section.

Second, by forming an air induction slope inclined at a predetermined angle to expand the area on the inner surface of the backwind bump, the direction of the exhaust air discharged from the inside can be directed to the outside, thereby increasing the exhaust efficiency.

Third, by forming a draft movement guide surface curved inward of the draft blocking wall on the outer peripheral surface of the draft blocking wall, it is possible to change the direction of the incoming draft and block it from flowing into the piping section,

Fourth, by forming a return guide surface curved with a predetermined radius on the outer peripheral surface of the headwind blocking portion, there is an effect of minimizing the amount of draft flowing into the interior by returning the direction of draft wind flowing in through the outer wall.

1 is an installation configuration diagram showing the installation structure of a conventional exhaust hood cap;
Figure 2 is a side cross-sectional view showing the internal structure of a conventional exhaust hood cap and a graph showing the amount of air discharged according to the draft angle for the conventional exhaust hood cap;
Figure 3 is an installation configuration diagram showing the installation structure of the exhaust hood cap according to the present invention;
Figure 4 is a perspective and exploded perspective view showing the exhaust hood cap according to the present invention;
Figure 5 is a side cross-sectional view showing the internal structure of the exhaust hood cap according to the present invention and a graph showing the amount of air discharged according to the draft angle for the exhaust hood cap according to the present invention;
Figure 6 is an enlarged view of portion "A" of Figure 5, and is a partial enlarged view showing the air induction slope according to the present invention;
Figure 7 is an enlarged view of portion "A" of Figure 5, a partial enlarged view showing the draft movement guidance surface according to the present invention;
Figure 6 is an enlarged view of portion "A" of Figure 5, and is a partial enlarged view showing the return induction surface according to the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the attached drawings.

As shown in FIG. 3, the exhaust hood cap for preventing backwind is attached to the end of the pipe (P) connected to the range hood (R) or ventilation hole (H) to exhaust indoor air and block external wind at the same time. It is an exhaust hood cap (1) for preventing backwind installed on the outer wall (W) of the building, and as shown in FIGS. 3 to 5, a pipe-shaped connection pipe (11) connected to the end of the pipe (P), and the connection A piping section consisting of a seating flange (12) extending outward to be in close contact with the outer wall (W) on one side of the pipe (11) and a plurality of bolt fastening holes (13) penetrating back and forth through one side of the seating flange (12). (10) and; A disc-shaped cover body 21 disposed at a predetermined distance in front of the piping section 10, and a draft blocking wall extending from the edge of the cover body 21 in the direction of the piping section 10 ( 22), and a cover portion 20 consisting of a cylindrical bolt seating port 23 formed on one surface of the cover body 21 to communicate with the bolt fastening hole 13; It is composed of a ring-shaped backwind blocking portion 30 that protrudes forward on one surface of the seating flange 12 to block draft wind (WO) flowing between the seating flange 12 and the draft blocking wall 22. .

Meanwhile, it is preferable that the angle of the virtual straight line connecting the lower end of the draft blocking wall 22 and the upper end of the draft blocking part 30 is manufactured to be 45 degrees or less with respect to the outer wall (W).

Here, a bolt penetrates the bolt fastening hole 13, which is preferably fastened with a screw thread formed on the inside of the bolt seating hole 23, and thus the bolt penetrates the seating flange 12 from the rear to the front. It is desirable to conclude.

And, as shown in FIG. 6, the headwind blocking unit 30 includes a ring-shaped headwind stopper 31 protruding in the direction of the cover unit 20, and a headwind stopper 31 on the inner surface of the headwind stopper 31. The inner surface of (31) consists of an air induction inclined surface (32) inclined at a predetermined angle to expand the tube.

In addition, on the outer peripheral surface of the draft blocking wall 22, as shown in FIG. 7, the direction of the draft wind (WO) moving between the draft blocking wall 22 and the backwind blocking portion 30 is formed in the direction of the outer wall (W). A draft movement guide surface 24 is formed that is curved toward the inside of the draft blocking wall 22 so that it can be changed by pressing.

In addition, as shown in FIG. 8, a return guide surface 33 curved at a predetermined radius is formed on the outer peripheral surface of the backwind blocking portion 30 to return the direction of the draft wind (WO) flowing in through the outer wall (W). do.

The operation of the exhaust hood cap for preventing backwind according to the present invention configured as described above is as follows.

As shown in FIG. 3, the exhaust hood cap for preventing backwind is attached to the end of the pipe (P) connected to the range hood (R) or ventilation hole (H) to exhaust indoor air and block external wind at the same time. It is an exhaust hood cap (1) installed on the exterior wall (W) of the building to prevent backdraft.

That is, as shown in FIG. 5, the exhaust hood cap 1 is spaced apart from the piping part 10 through which the internal air is discharged by a predetermined distance in front of it, and has a disc-shaped cover part ( 20), it is possible to prevent a decrease in the discharge efficiency of air discharged from the inside through the cover portion that blocks drafts.

At this time, as shown in FIGS. 5 and 6, one surface of the seating flange 12 has a ring protruding forward to block the draft WO flowing between the seating flange 12 and the draft blocking wall 22. By forming the shaped backwind blocking portion 30, the draft wind (WO) flowing in between the seating flange 12 and the draft blocking wall 22 is prevented from colliding with the air discharged from the inside, thereby reducing the discharge efficiency. It can be prevented in advance.

Here, the graph shown in FIG. 5 is a graph measuring the exhaust wind volume discharged from the inside according to the angle of the draft wind. As confirmed, when the draft wind (WO) is no wind, the exhaust wind volume is 450 m/h in 3rd gear, It was measured at 360m/h in 1st stage, and when it flows in at 80 degrees from the outer wall (W), it is 400m/h in 3rd stage. It is measured at 325m/h in 1st stage. If it flows in at 45 degrees, it is measured at 325m/h in 3rd stage. It can be confirmed that it is 360m/h and measured at 295m/h in 1st stage, and when flowing horizontally, it is 355m/h in 3rd stage and 290m/h in 1st stage.

Meanwhile, conventionally, as shown in the graph shown in FIG. 2, the exhaust air volume satisfies the KS standard (270 m/h), but in the case of one stage, it is close to the KS standard, so when a typhoon or gust of wind occurs, the existing exhaust hood cap meets the KS standard. It can be confirmed that the problem of not being able to comply with the above can be solved through the headwind blocking unit 30.

In addition, as shown in FIG. 6, the backwind blocking unit 30 is formed with a ring-shaped backwind barrier 31 protruding in the direction of the cover unit 20, thereby preventing draft air (WO) flowing in from the outside through the pipe. It is possible to block the inflow into the interior of the unit 10.

At this time, an air induction slope 32 is formed on the inner surface of the backwind stopper 31, inclined at a predetermined angle so as to expand the inner side of the backwind stopper 31, so that the direction of the exhaust air discharged from the inside is directed to the outside. This can lead to increased emission efficiency.

In addition, on the outer peripheral surface of the draft blocking wall 22, as shown in FIG. 7, the direction of the draft wind (WO) moving between the draft blocking wall 22 and the backwind blocking portion 30 is formed in the direction of the outer wall (W). By forming a draft movement guiding surface 24 curved inwardly of the draft blocking wall 22 to be changed by pressing, the draft (WO) in contact with the draft movement guiding surface 24 flows along the surface. It is changed, and the changed draft wind (WO) pushes the draft wind (WO) moving between the draft blocking wall 22 and the back wind blocking unit 30 in one direction, thereby minimizing the inflow of the draft wind (WO). .

In addition, as shown in FIG. 8, a return guide surface 33 curved at a predetermined radius is formed on the outer peripheral surface of the backwind blocking portion 30 to return the direction of the draft wind (WO) flowing in through the outer wall (W). As a result, when the draft wind (WO) flowing in through the outer wall (W) contacts the return induction surface (33), it can change direction in the opposite direction along the surface, thereby minimizing the amount of draft wind flowing inside. There will be.

The present invention is not limited to the specific preferred embodiments described above, and various modifications can be made by anyone skilled in the art without departing from the gist of the invention as claimed in the claims. Of course, such changes are within the scope of the claims.

<Explanation of symbols for main parts of the drawing>
R: Range hood H: Ventilation hole
P Pipe W: Exterior wall
WO: Draft 1: Exhaust hood cap
10: piping part 11: connection pipe
12: Seating flange 13: Bolt fastening hole
20: cover part 21: cover body
22: draft blocking wall 23: bolt seating port
24: Draft movement guide surface 30: Backwind blocking portion
31: Backwind stopper 32: Air induction slope
33: return induction surface

Claims (4)

It is mounted on the end of the pipe (P) connected to the range hood (R) or ventilation hole (H) to exhaust indoor air and block external wind at the same time, and is installed on the exterior wall (W) of the building to prevent backdraft hood cap (1) ) in,
A pipe-shaped connection pipe 11 connected to an end of the pipe P, a seating flange 12 extending outward to be in close contact with the outer wall W on one side of the connection pipe 11, and the seating flange A piping portion (10) consisting of a plurality of bolt fastening holes (13) penetrating front and rear on one side of (12);
A disc-shaped cover body 21 disposed at a predetermined distance in front of the piping section 10, and a draft blocking wall extending from the edge of the cover body 21 in the direction of the piping section 10 ( 22), and a cover portion 20 consisting of a cylindrical bolt seating port 23 formed on one surface of the cover body 21 to communicate with the bolt fastening hole 13;
A ring-shaped backwind blocking portion (30) protruding forward on one surface of the seating flange (12) to block the draft (WO) flowing between the seating flange (12) and the draft blocking wall (22). Features an exhaust hood cap to prevent backwind. According to claim 1,
The headwind blocking unit 30 includes a ring-shaped headwind stopper 31 protruding in the direction of the cover part 20, and an inner surface of the headwind stopper 31 so that the inner surface of the headwind stopper 31 is expanded. An exhaust hood cap for preventing backwind, characterized by consisting of an air induction inclined surface (32) inclined at a predetermined angle. According to claim 1,
On the outer peripheral surface of the draft blocking wall (22), the draft blocking wall (22) is provided so that the direction of the draft (WO) moving between the draft blocking wall (22) and the backwind blocking unit (30) is changed by pressing it in the direction of the outer wall (W). An exhaust hood cap for preventing backwind, characterized in that a draft movement guide surface (24) is formed curved inward of (22). According to claim 1,
An exhaust hood cap for preventing backwind, characterized in that a return guide surface 33 curved at a predetermined radius is formed on the outer peripheral surface of the backwind blocking portion 30 to return the direction of draft wind (WO) flowing in through the outer wall (W). .

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