KR100529002B1 - Local exhaust ventilation system with covered rotating swirler - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a local exhaust device having a rotating swirler to form a vortex and to enlarge the exhaust area using the swirl swirler.

Local exhaust apparatus using a swirler according to the present invention is located adjacent to the inlet end of the exhaust pipe, the annular disk (rotate) to rotate the axis of the exhaust pipe shaft center rotational axis, and a plurality along the outer edge of the annular disk A swirler comprising wings disposed and fixed respectively in a radial direction; Arranged apart with a first gap between the outer surface of the exhaust pipe and a second gap between the annular top cover covering the upper portion of the swirler wing and the upper cover. A swirler cover comprising an annular lower cover covering the bottom of the swirler wing; And a driving unit installed in the exhaust pipe to rotate the swirler while the swirler rotating shaft is fixed.

Description

LOCAL EXHAUST VENTILATION SYSTEM WITH COVERED ROTATING SWIRLER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a local exhaust device, and more particularly, to a local exhaust device having a rotatable swirler to form a vortex and expanding the exhaust area by using the same.

Local exhaust systems are generally used in factories, homes, restaurants, etc., where pollutants are generated a lot, especially when partial pollutants are generated on the floor away from the exhaust vents or by other installations. It can be usefully used in case of occurrence and instantaneous pollution source.

However, the conventional local exhaust devices used for such a purpose contained various problems, which are as follows.

In other words, the capture rate required for the removal of contaminants decreases rapidly in the axial direction, which makes it inefficient for removal of contaminants occurring far from the exhaust pipe. In this case, however, there is a problem that the exhaust efficiency is lowered due to the movement of the workers as well as the work process.

In order to solve the problems of the conventional local exhaust device, exhaust devices using vortices have been developed, and these devices generate vortices by blowing air into the space similar to the flow rate of exhaust, and the exhaust device inhales them. Vortex concentrated in the process was used to improve the exhaust efficiency.

However, these exhaust systems also generate noise due to the generation of turbulence caused by mutual interference between the blowing air and the inhaling flow in a narrow area under the exhaust port, and additional diffusion of contamination in the space by the flow blowing into the space. In addition, there is a fear of causing, there is a disadvantage to install additional equipment such as a blower, a filter, a flow pipe for generating a vortex.

The present invention has been made to solve the above problems, the object of which is to install a swirler with wings in the annular disc in the exhaust port and the swirler to have a gap in the radial direction and the gap formed along the outer periphery of the exhaust pipe By providing a cover and rotating the swirler, it is to provide a local exhaust device that draws air above the exhaust port to form a vortex in the radial direction to improve the exhaust efficiency.

Another object of the present invention is to provide a local exhaust device capable of securing the safety of an operator working under the device by providing a cover to protect the rotating swirler.

In order to achieve the above object, a local exhaust device using a swirler according to the present invention includes an annular disk for rotating the shaft center of the exhaust pipe with a rotation axis while being located adjacent to an end inlet of the exhaust pipe; A swirler comprising a plurality of wings disposed along the outer edge and each of which is fixed in a radial direction; Arranged apart with a first gap between the outer surface of the exhaust pipe and a second gap between the annular top cover covering the upper portion of the swirler wing and the upper cover. A swirler cover comprising an annular lower cover covering the bottom of the swirler wing; And a driving unit installed in the exhaust pipe to rotate the swirler while the swirler rotating shaft is fixed.

The swirler cover is formed such that the space between the upper cover and the lower cover becomes narrower as it moves away from the rotational center of the swirler in the radial direction.

In the swirler cover, a hole having a diameter larger than the outer diameter of the exhaust pipe is formed in the annular upper cover, and a hole having a diameter close to the inner diameter of the exhaust pipe is formed in the annular lower cover.

Each swirler blade has a streamlined shape that is higher toward the center of rotation and lowered away from the center of rotation, so that the upper cover of the swirler cover is also higher toward the center of rotation, and radius from the center of rotation. It may be made in a shape that is lowered farther in the direction.

The swirler blades may be formed to have a portion extending radially outward of the edge of the annular disk, and have a shape extending in a straight line along the radial direction or curved in the circumferential direction of the annular disk. Characterized in that it is formed to have. Each wing of the swirler may be fixed to the upper surface of the annular disk perpendicular to the annular disk surface.

The drive unit is provided with a drive motor fixed by a bracket inside the exhaust pipe, characterized in that for rotating the swirler while the center of rotation of the swirler is fixed to the drive rod of the drive motor.

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

1 is a side cross-sectional view showing a local exhaust device according to an embodiment of the present invention, Figure 2 is a plan sectional view showing a local exhaust device according to an embodiment of the present invention.

The local exhaust device 10 according to the present embodiment has a swirler 20 and a wing 27 portion of the swirler 20 which are installed adjacent to the end inlet of the exhaust pipe 12 to form a vortex while rotating. It includes a swirler cover 30 and a driving unit 40 fixed to the exhaust pipe 12 to rotate the swirler 20.

The swirler 20 is positioned adjacent to the end of the exhaust pipe 12 and has an annular disk 23 which rotates the shaft center of the exhaust pipe 12 with a rotation axis, and an outer side of the annular disk 23. A plurality is arranged along the edge, each of which comprises a wing 27 which is fixed in a radial position.

The annular disk 23 has a hole having a diameter of at least the same size as the inner diameter of the exhaust pipe 12, the outer diameter of the annular disk 23 is made larger than the diameter of the exhaust pipe (12). The annular disk 23 is fixed while the inside of the hole is connected to the connecting teeth 25 radially extending from the center of rotation 21 of the swirler 20. Since the connecting ribs 25 are disposed at the inlet of the exhaust pipe 12, when too many are formed, they interfere with the flow of the fluid, and as shown in FIGS. 2 and 3, it is preferable that about three are arranged.

Wings 27 disposed on the outer edge of the annular disk 23 is preferably fixed to the upper surface of the annular disk 23 perpendicular to the disk surface, a portion of the wing 27 of the annular disk 23 It extends radially outwardly of the rim.

When the shape of the wing 27 is set on the annular disk 23 is fixed on the basis, as shown in Figure 1, the higher the higher toward the swirler 20 rotation center 21, the center of rotation It is made in the streamline shape which height becomes low, so that it becomes radially away from (21). Since the wing 27 is a portion that substantially generates vortex when the swirler 20 rotates, when the swirler 20 has a streamline shape as described above, a large amount of air is drawn in from the inlet of the exhaust pipe 12 to eject in a radial direction. Can be.

 In addition, in the present embodiment, each of the wings 27 is formed to extend in a straight line along the radial direction, as shown in FIG.

On the other hand, the swirler cover 30 is composed of an upper cover 32 covering the top of the swirler wing 27 and a lower cover 36 covering the bottom of the swirler wing 27.

The upper cover 32 is formed in the shape of an annular shape having a hole larger than the outer diameter of the exhaust pipe 12 in the center, and has a first gap I between the outer surface of the exhaust pipe 12. Are placed away). The lower cover 36 is formed in an annular shape having a hole having a size close to the inner diameter of the exhaust pipe 12 in the center thereof, and is separated from the upper cover 32 with a second gap II therebetween. Is placed.

In particular, the upper cover 32 is higher in height toward the center of rotation of the swirler 20 along the shape of the swirler wing 27, and lower in the radial direction away from the center of rotation (21) Losing in a curved shape. On the other hand, since the lower cover 36 has a flat plate shape, the swirler cover 30 becomes narrower as the space between the upper cover 32 and the lower cover 36 moves away from the center in the radial direction. With such a shape, when the swirler cover 30 ejects the air drawn by the swirler 20 in the radial direction, it is accelerated by the narrowing space to form a strong vortex.

The swirler cover 30 also serves to protect the swirler wing 27 from above and below.

The upper cover 32 is fixed to the outer surface of the exhaust pipe 12 through the fixing pin 38, the fixing pin 38 is the first between the outer cover and the upper cover 32 of the exhaust pipe 12 It is preferable that the flow of the fluid passing through the gap (I) is installed at equal intervals with each other at an interval not to be disturbed, and about 4 to 6 may be installed.

The upper cover 32 and the lower cover 36 are also connected to each other by a fixing pin 34, the fixing pin 34 is a plurality of both cover along the outer edge of the upper cover 32 and the lower cover 36 It is formed radially between (32, 36). The fixing pins 34 are preferably installed at equal intervals from each other, and may be formed in a number corresponding to a position corresponding to each wing 27 of the swirler 20, but the number and position It is not necessarily limited to this range. Therefore, in this embodiment, the fixing pin 34, as shown in Figure 2, is formed extending in a straight line along the radial direction.

As shown in FIG. 1, the driving unit 40 fixedly installs the driving motor 43 on the inner side surface of the exhaust pipe 12 via the bracket 41 and drives the driving rod 45 of the driving motor 43. ) Extends to the inlet end of the exhaust pipe 12 to rotate the swirler 20 while the swirler 20 is fixed thereto. However, the drive unit in the present invention is not limited to the above structure, and any structure can be used as long as the swirler can be rotated using the axis center of the exhaust pipe as the rotation axis.

On the other hand, the swirler 20, the swirler cover 30 and the drive unit 40 as described above can be produced simply by modularization, it is also possible to attach the produced swirler module to the existing exhaust pipe.

Figure 3 is a plan sectional view showing a local exhaust device according to another embodiment of the present invention.

Referring to Figure 3, the local exhaust device according to the present embodiment is the same as the local exhaust device according to the above embodiment, except that the wing 52 and the swirler cover 30 is fixed to the annular disk (23) The shape of the fixing pin 54, which serves to form and connect a predetermined gap between the upper cover 32 and the lower cover 36 of the) is different.

That is, in the present embodiment, the swirler blade 52 is formed to have a curved shape in the circumferential direction of the annular disc 23, and the shape of the fixing pin 54 is also in the circumferential direction of the lower cover 36. It has a curved shape. At this time, the curved direction of the swirler blade 52 is preferably formed to face in a direction opposite to the curved direction of the fixing pin 54. By forming in this way, the fluid accelerated by the swirler 20 serves to help a strong vortex.

The operating principle of the local exhaust device according to the present invention is as follows.

When the swirler 20 rotates while the exhaust operation is performed as shown in FIG. 1, the fluid ⓐ above the inlet of the exhaust pipe 12 flows into the swirler cover 30 through the first gap I. It is sucked in and is ejected by the swirler wing 27 into the vortic flow ⓑ in the radial direction through the second gap II. At this time, the fluid is accelerated and ejected by the swirler cover 30 and the fixing pin 34 to maintain the vortex component. The flow under the inlet of the exhaust pipe 12 by the accelerated vortex flow is divided into a flow ⓒ radially pushed out and a flow ⓓ toward the central axis by the exhaust operation. Since the exhaust device 10 operates with a constant exhaust flow rate, the exhaust flow rate is supplemented with the fluid below the axis by the radially flowed flow rate, and the interaction of the flow expands the exhaust area in the axial direction.

The vortices ⓑ and ⓒ which are radiated in the radial direction are gathered again in the axial direction by the exhaust flow, and thus, the secondary vortices ⓔ are formed below the swirler 20. Since the secondary vortex ⓔ is continuously supplied with energy by the swirler 20 and rotates at a constant speed, the secondary vortex ⓔ serves to push the air below the secondary vortex ⓔ toward the exhaust pipe 12. In this way, the exhaust region is expanded by accelerating in the direction of the inlet of the exhaust pipe 12 of the exhaust flow.

In addition, when the vortex component spreading in a large radius is gathered about the axis by the exhaust flow, it has a stronger rotational speed due to the angular moment conservation, thereby forming a low pressure distribution in the axial direction under the exhaust pipe 12 to form a strong exhaust flow. Done.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

As described above, according to the local exhaust apparatus using the swirler according to the present invention, the swirl performance and the swirler cover covering the air draw in air above the inlet of the exhaust pipe to form a vortex in the radial direction to improve the exhaust performance of the apparatus. It can improve, prevent the re-spreading of contaminants, and enable efficient removal of locally occurring contaminants.

In addition, since the swirler, the swirler cover and the drive unit can be modularized and simply installed in the existing exhaust pipe, the existing device can be utilized without additional equipment.

In addition, since the swirler blade rotating at high speed is formed by covering the swirler cover, the worker working under the apparatus can be protected.

1 is a side cross-sectional view showing a local exhaust device according to an embodiment of the present invention.

Figure 2 is a plan sectional view showing a local exhaust device according to an embodiment of the present invention.

Figure 3 is a plan sectional view showing a local exhaust device according to another embodiment of the present invention.

Claims (10)

An annular disk which is located adjacent to an end inlet of the exhaust pipe and rotates the exhaust pipe shaft center with a rotation axis, and a plurality of wings are arranged along the outer edge of the annular disk, each of which is fixed in a radial direction A swirler comprising; Arranged apart with a first gap between the outer surface of the exhaust pipe and a second gap between the annular top cover covering the upper portion of the swirler wing and the upper cover. A swirler cover comprising an annular lower cover covering the bottom of the swirler wing; And A drive unit installed in an exhaust pipe to rotate the swirler while the swirler rotating shaft is fixed; Local exhaust device using a swirler comprising a. The method of claim 1, The swirler cover is a local exhaust device using a swirler, characterized in that the space between the upper cover and the lower cover is narrower away from the rotation center of the swirler in the radial direction. The method of claim 1, The swirler cover uses a swirler, characterized in that it comprises an annular upper cover having a hole having a diameter larger than the outer diameter of the exhaust pipe, and a lower cover having a hole having a diameter close to the inner diameter of the exhaust pipe. Local exhaust system. The method of claim 1, Wherein each blade is a local exhaust device using a swirler, characterized in that it has a streamlined shape that is higher toward the rotation center, and lowered away from the rotation center in the radial direction. The method of claim 4, wherein The upper cover of the swirler cover is a local exhaust device using a swirler, characterized in that the higher toward the center of rotation along the blade shape of the swirler, the lower the radially away from the center of rotation. The method of claim 1, The swirler wing is a local exhaust device using a swirler, characterized in that the portion is formed extending in the radial direction outward to the edge of the annular disk. The method of claim 1, Each wing of the swirler is a local exhaust device using a swirler, characterized in that it is formed to have a shape extending in a straight line in the radial direction. The method of claim 1, And each vane of the swirler is formed to have a curved shape in the circumferential direction of the annular disk. The method of claim 1, Each vane of the swirler is a local exhaust device using a swirler, characterized in that the upper surface of the annular disk and the vertical perpendicular to the annular disk surface is fixed. The method of claim 1, The drive unit has a drive motor fixed to the inside of the exhaust pipe is installed, the local exhaust using a swirler characterized in that the rotating center of the swirler is fixed to the drive rod of the drive motor while rotating the swirler Device.