KR100784250B1 - Vortex Exhaust System - Google Patents

Abstract

The purpose of the present invention is to reduce the noise caused by the vortex interference, to remove the exhaust gas in a wider area, to simplify the structure and to install and use in the existing equipment to reduce the cost and installation and maintenance It is to provide an exhaust system that can reduce the effort required.

Accordingly, the present invention is a disk-shaped swirler rotatably installed with respect to the exhaust pipe, the wings are arranged in the vertical direction along the swirler to form a vortex, the drive unit is installed in the exhaust pipe to rotate the swirler It provides an exhaust device using a vortex comprising.

Exhaust pipe, swirler, wing, drive motor

Description

Vortex Ventilator using swiler}

1 is a schematic cross-sectional view showing an exhaust device according to the present invention;

2 is a schematic cross-sectional view showing an exhaust device according to another embodiment of the present invention;

3 is a view showing a swirler installed in the exhaust device of the present invention;

4 is a view showing another embodiment of a swirler according to the present invention;

5 is a perspective view showing a state in which a protection means is installed on the outside of the swirler according to the present invention;

6a and 6b is an operating state diagram showing the operating state of the exhaust device according to the present invention according to the difference in the rotational speed of the swirler,

7a and 7b is an operating state diagram showing the operating state of the exhaust device according to the present invention according to the difference in the angle of the swirler.

Explanation of symbols on the main parts of the drawings

10: swirler 11: wings

20,32: Drive motor 21: Bracket

30: bearing 31: rack

33: Pinion gear 40: Secondary vortex                 

50 exhaust pipe 60 rear panel

61: front panel 62: support

The present invention relates to an exhaust device. More particularly, the present invention relates to an exhaust device capable of enlarging the exhaust area using vortices and thereby improving the exhaust performance.

The present invention can be used in factories, homes and restaurants where a lot of pollutants are generated. Preferably, when a partial pollutant is generated on the floor away from the exhaust port, it is difficult to install the exhaust port near the pollutant by another installation. In this case, it can be used in case of occurrence of instant pollutant sources.

Existing general exhaust devices reduce exhaust speed rapidly as they move away from the exhaust port, so that the effective exhaust area is limited to a region as small as the diameter of the exhaust port, which is not suitable for removing contamination occurring far from the exhaust port.

In order to make up for this drawback, exhaust devices using vortices have been developed, which use a concentrated vortex formed by blowing air into the space, which is comparable to the flow rate of the exhaust. will be.

However, the above-described conventional devices generate noise due to the generation of turbulence due to mutual interference between the blowing air and the inhaling flow in a narrow area under the exhaust port, and also the addition of pollution in the space by the flow blowing into the space. It may cause diffusion and has the disadvantage of installing additional equipment such as a blower, a filter, and a flow pipe for generating vortices.

Accordingly, an object of the present invention is to provide an exhaust device that can reduce noise caused by eddy current interference, which is devised to solve the above problems.

Another object of the present invention is to provide an exhaust device capable of removing exhaust gas in a wider area.

In addition, the present invention has another object to provide an exhaust device that can simplify the structure and to be installed and used in an existing facility to reduce the cost and reduce the effort required for installation and maintenance.

In order to achieve the object as described above, the present invention, by using a disk (swivel) rotating at a high speed and a variety of wings installed on it to form a strong vortex in the space to be exhausted, and thus the vortex and the exhaust flow formed By creating an imaginary air curtain (secondary vortex) under the influence, the air curtain collects the exhaust area near the central axis, consequently concentrating the exhaust flow to the source of contamination and expanding the exhaust area to a distance. Make a point.

Therefore, if the swirler can be operated when instantaneous local pollution occurs, it can improve the energy efficiency and also cause tornado-like flow by the interaction with the bottom surface. Effective removal of pollutants can also be expected.

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

1 is a schematic cross-sectional view showing an exhaust device according to the present invention.

According to the above-described drawings, the present invention comprises a swirler 10 installed in the exhaust pipe 50 constituting the exhaust device to form a vortex, and a drive unit for rotating the swirler 10.

The driving unit can be largely divided into an internal driving method and an external driving method. In the case of the internal driving method, the driving motor 20 is fixedly installed on the inner circumferential surface of the exhaust pipe 50 through the bracket 21 as shown in FIG. The center of rotation of the swirler 10 is fixed to the rotation shaft of the drive motor 20 extending outside the exhaust pipe 50.

In addition, in the case of the external drive method according to another embodiment of the present invention, as shown in Figure 2, the swirler 10 is rotatable through the bearing 30 on the outer peripheral surface of the front end of the exhaust pipe (50) The rack 31 is installed in a circular shape along an upper end of the swirler 10, and a pinion gear 33 is installed on a rotation shaft of the driving motor 32 installed outside the exhaust pipe 50. It is structured to engage with the rack 31.

Therefore, the power of the drive motor 32 is transmitted to the swirler 10 through the rack 31 and the pinion gear 33 to rotate the swirler 10.

In the case of the external drive method, the swirler, bearing, and motor can be easily modularized so that they can be easily attached to the existing exhaust pipe 50, and the internal drive can be minimized due to minimizing the failure of the motor due to a pollution source. It is preferable to the method.

Here, the drive unit may be used in any structure as long as the swirler 10 can be rotated with the center of the exhaust pipe 50 as the axial center, and is not particularly limited to the above-mentioned structure.

On the other hand, the swirler 10 is rotated with respect to the exhaust pipe 50 to generate the vortex, it is made of a circular flat plate structure and includes a predetermined shape of the wings 11 arranged in the vertical direction at the bottom of the flat plate do.

The vane 11 is a portion that substantially generates vortex when the swirler 10 rotates, and the characteristics of the vortex vary depending on the installation direction, the installation position, or the form of the swirler 10. A swirler 10 having various types of wings 11 may be considered, such as installing the wings 11 away from or near the central axis, or installing the blades 11 in a straight line and a curved shape.

3 illustrates a structure in which the wing 11 is curved toward an axial center to form a curved surface, and FIG. 4 illustrates a structure of a wing 11 formed in a straight line as another embodiment of the present invention. Doing.

In addition, the driving speed (rotational speed) of the swirler 10 also affects the flow around the exhaust pipe 50, and in general, it is preferable to rotate at a speed of 2000 to 3000 rpm.                     

In addition, according to another embodiment of the present invention, the protection means is further installed on the outside of the swirler to prevent the safety accident by the swirler rotating at high speed with the equipment protection.

To this end, the protection means is installed in the exhaust pipe 50 is located in the disk-shaped back plate 60 extending to the rear of the swirler 10 and the front of the wing 11 is installed on the swirler 10 A donut-shaped front plate 61 includes a support 62 which is vertically installed with a predetermined interval at the front end of the back plate 60 to support the front plate 61.

Therefore, the swirler 10 and the blade 11 are covered and protected by the back plate 60 and the front plate 61, and the air gap for forming the vortex is formed between the back plate and the front plate, that is, the wing 11 side is opened. Is blown away.

The operating principle of the present invention is as follows.

When the swirler 10 is rotated while the exhaust operation is performed as shown in FIG. 6A, the flow under the swirler 10 simultaneously affects the centrifugal force pushed out by the swirler 10 and the centripetal force due to the exhaust operation. It does not move in the radial direction, but rotates by the rotational speed of the swirler 10. The fluid that does not move in the radial direction is like a virtual fluid wall (air curtain).

Since the exhaust device operates at a constant exhaust flow rate, air is sucked under the air curtain than air outside the air curtain. At this time, the air pushed out by the swirler 10 enters the seat of the sucked air. It is directed toward the exhaust pipe (50). Based on this principle, the secondary vortex 40 is formed below the swirler 10 to rotate in a direction perpendicular to the rotational direction of the swirler 10 as shown in FIG. 6A. (Of course, this secondary vortex is part of the primary vortex (air curtain) that rotates about the axis of the exhaust pipe 50.)

Since the secondary vortex 40 formed as described above is continuously supplied with energy by the swirler 10 and rotates at a constant speed, the secondary vortex 40 serves to push the air below the secondary vortex 40 toward the exhaust pipe 50. This principle causes the influence of the exhaust flow to expand downwards, which results in a larger exhaust area.

The position where the secondary vortex 40 is formed varies depending on the rotational speed of the swirler 10. As the swirler rotational speed increases, the centrifugal force acts greatly, so that the secondary vortex 40 is generated farther from the swirler. (See Figure 6b)

When the rotational speed of the swirler 10 is small and the secondary vortex 40 is formed below the swirler, a complicated and strong turbulence occurs at the lower side of the swirler, thereby increasing noise. In addition, since the pollutant is diffused in the turbulence, there is a fear of the spread of the pollutant in the exhaust flow. However, if the secondary vortex 40 is formed away from the swirler, the noise is reduced by the reliable separation of the secondary vortex 40 and the exhaust flow, and there is no fear of spreading the pollutant by the swirler. In addition, a wider exhaust area is formed by the secondary vortex 40 that exits the swirler.

The flow characteristics as described above are also affected by the shape of the swirler 10, that is, the size of the swirler and the angle formed with the axis. The larger the radius of the swirler can form a strong vortex, with a deeper exhaust depth at the same rotational speed. As in FIG. 6A, the swirler 10 is generally in a state perpendicular to the axis.                     

As shown in FIG. 7A, when the angle θ formed between the central axis of rotation and the inclined surface of the swirler 10 is between 45 and 90 degrees, the secondary vortex 40 may be sent downward near the bottom surface. However, when the angle formed by the swirler 10 is between 45 and 90 degrees, the secondary vortex 40 is crushed by the inclined surface of the swirler 10, and as a result, the exhaust flow is in an unstable state. In this case, there is a concern that the pollutant may be diffused by the unstable flow. As shown in FIG. 7B, when the angle θ formed between the central axis of rotation and the inclined surface of the swirler 10 is between 90 and 120 degrees, which is greater than 90 degrees, the exhaust depth is reduced, but stable secondary vortex is inclined than when the inclined surface is 90 degrees. 40 is formed so that the noise is reduced, the exhaust flow also flows stably.

The shape of the wings 11 attached to the swirler 10 also plays an important role. When the swirler 10 rotates, the fluid around the wing is rotated by the blade 11 attached to the swirler. Therefore, the larger the cross-sectional area of the wing, the more the fluid can be rotated. The larger the radius, the faster the swirler rotates, so the outer wings should be longer. Also, in order to prevent the spread of the pollutant by the swirler, the wing should be attached to the swirler at a predetermined distance from the exhaust pipe 50. And, as mentioned, the shape of the wing with curvature can be considered to push out a large amount of flow outward.

According to the exhaust device according to the present invention as described above, it is possible to improve the exhaust performance of the exhaust port by using the vortex formed by the swirler, it is possible to efficiently remove the locally generated pollutant source, There is an advantage that can be simply installed and used in the existing exhaust system without expansion.

Claims (5)

A disk shaped swirler rotatably installed with respect to the exhaust pipe, Wings arranged in a vertical direction along the swirler to form a vortex, Exhaust device using a vortex installed in the exhaust pipe and including a drive unit for rotating the swirler. 2. The exhaust device using vortex according to claim 1, wherein the vane has a straight structure or a curved structure that is curved toward an axial center. The exhaust device using vortex according to claim 1 or 2, wherein an angle formed between the center of rotation of the swirler and the inclined surface of the swirler is between 45 and 120 degrees. The exhaust device using vortex according to claim 3, wherein the vanes are spaced apart from the exhaust pipe at a predetermined interval and are formed longer in length toward the outside. According to claim 1, wherein the drive unit is installed on the outer peripheral surface of the end of the exhaust pipe rotatable by the swirler, the rack is installed in a circular shape along the upper end of the swirler, is installed outside the exhaust pipe An exhaust device using a vortex, characterized in that the rotation shaft of the drive motor is a structure in which a gear is installed and meshed with the rack.

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