KR102146057B1 - Local ventilator - Google Patents

Abstract

Disclosed is a local exhaust device that sucks contaminated air and discharges it to the outside. The disclosed local exhaust device includes a driving unit; A swirler disposed near the inlet of the exhaust pipe and rotating by the driving unit to generate a vortex; And a box accommodating the swallower therein. An opening is formed in a portion corresponding to the vortex discharge end on a front wall of the box facing the vortex discharge end of the swirler, and the rotation center of the swirler between the front wall of the box and the vortex discharge end By forming a gap in the axial direction, the eddy current generated by the swirler and discharged through the vortex discharge end is introduced into the box through the gap, and the outside air of the box is also flowed through the opening and the gap. It flows into the box. An auxiliary exhaust port is formed on one of the side walls of the box, and the auxiliary exhaust port includes an exhaust means for discharging at least a portion of the vortex and external air introduced into the box to the outside of the box through the auxiliary exhaust port. Installed.

Description

Local ventilator

The present invention relates to a local exhaust device that sucks contaminated air and discharges it to the outside, and more particularly, to a local exhaust device capable of improving exhaust efficiency by forming a stable exhaust flow.

In general, exhaust systems are installed in factories or kitchens of homes or restaurants that generate pollutants such as odors, harmful gases, smoke, dust, etc., and inhale air containing these pollutants (hereinafter referred to as polluted air) to the outside. It is used for discharge.

In the conventional exhaust system used for this purpose, as the distance between the pollutant source and the exhaust device increases, the exhaust efficiency of inhaling and discharging polluted air decreases sharply. Even when the pollutant source is located in a wide open space, the exhaust system The exhaust efficiency of is lowered.

Therefore, in order to improve the exhaust efficiency, it is desirable to install the exhaust device as close to the pollutant source as possible and to block the pollutant source from the surrounding space.

However, in actual work sites, there are many cases where it is difficult to install an exhaust device close to a pollutant source and it is difficult to block the pollutant source from the surrounding space. In this case, a satisfactory exhaust efficiency cannot be obtained from a conventional exhaust device. There was this. In order to solve this problem, an exhaust fan with a larger capacity than necessary is used to increase the intake of polluted air, but in this case, the noise becomes severe and the installation and operation costs are excessive, which not only lowers economic efficiency, but is still satisfactory exhaust ventilation. There is a drawback of not getting efficiency.

In order to compensate for the problems of the conventional exhaust system, a local exhaust device that improves exhaust efficiency by using a swirler that forms a vortex has been developed, and Korean Patent No. 10-0873522 discloses a local exhaust system using a swirler. An example of an exhaust device is disclosed.

[0003] Such conventional local exhaust devices generally include a swirler installed near an inlet of an exhaust pipe to form a vortex. The airflow generated by the rotation of the swirler forms a vortex around the exhaust flow of polluted air rising from the pollutant source along the rotational central axis of the swirler toward the intake of the exhaust pipe. The vortex formed in this way acts as an air curtain that blocks the pollutant source from the surrounding space, thereby enabling the polluted air to be more efficiently sucked into the exhaust pipe.

In addition, Korean Patent Registration No. 10-1606862 discloses another example of a conventional local exhaust device. This local exhaust device includes a swirler forming a vortex and a guide member for extending the air curtain formed by the vortex in a vertical direction. We have. Such a local exhaust system has the advantage of improving exhaust efficiency since it is possible to more easily and efficiently inhale and exhaust contaminated air far from the exhaust pipe.

As described above, in a local exhaust system using a swirler, the eddy current formed by the swirler serves as an air curtain surrounding the exhaust flow. However, when there are walls or other devices around the pollutant source, or when there is a worker, the vortex formed by the swirler hits the surrounding wall, device, or worker, and the flow is unstable and disturbed. As described above, if the flow of the eddy current serving as the air curtain is not stabilized, the flow of exhaust toward the exhaust pipe is not stabilized, thereby reducing the exhaust efficiency. In particular, since the direction of the eddy current forming the air curtain and the direction of the exhaust flow are opposite to each other, when the vortex flow is not reliably stabilized, the vortex flow itself may rather interfere with the exhaust flow.

Therefore, in the conventional local exhaust system using a swallower, there is a need for an improvement to further stabilize the exhaust flow.

Patent Document 1: Republic of Korea Patent Registration No. 10-0873522 (2008. 12. 04. registration) Patent Document 2: Korean Patent Registration No. 10-1606862 (registered on March 22, 2016)

The present invention was created to solve the conventional problems as described above, and an object thereof is to provide a local exhaust device capable of improving exhaust efficiency by forming a more stable exhaust flow using a box surrounding the swallower. .

In order to achieve the above technical problem, the local exhaust device according to embodiments of the present invention,

Driving unit;

A rotating plate member connected to the driving unit and having an exhaust hole communicating with the exhaust pipe in a central region, which is disposed near the inlet of the exhaust pipe and rotates by the driving unit, and is installed in the rotating plate member together with the rotating plate member. A swallower including a plurality of blades for generating an air flow forming the vortex while rotating; And

Includes; a box accommodating the swallower therein,

An opening is formed in a portion corresponding to the vortex discharge end on a front wall of the box facing the vortex discharge end of the swirler, and the rotation center of the swirler between the front wall of the box and the vortex discharge end By forming a gap in the axial direction, the eddy current generated by the swirler and discharged through the vortex discharge end is introduced into the box through the gap, and the outside air of the box is also flowed through the opening and the gap. Flows into the box,

An auxiliary exhaust port is formed on one of the side walls of the box, and the auxiliary exhaust port includes an exhaust means for discharging at least a portion of the vortex and external air introduced into the box to the outside of the box through the auxiliary exhaust port. It characterized in that it is installed.

In addition, the auxiliary exhaust port may be disposed adjacent to a front wall of the box in which the opening is formed.

In addition, at least two of the auxiliary exhaust ports are formed at intervals, and the exhaust means may be installed in each of the at least two auxiliary exhaust ports.

In addition, the diameter of the opening may be larger than the outer diameter of the vortex discharge end of the swirler.

Further, the exhaust means may be an exhaust fan and/or an exhaust duct.

In addition, the swallower is installed to surround the first guide member having a cylindrical shape installed at the outer edge of the rotating plate member and the outer ends of the plurality of blades, and an air flow passage between the first guide member It may further include a second guide member having a cylindrical shape to form a, and a third guide member installed to cover the upper portion of the plurality of wings.

In addition, the plurality of blades are radially disposed on the upper surface of the rotating plate member, and outer ends of the plurality of blades protrude out of the outer circumferential surface of the rotating plate member and may extend long to the lower end of the outer peripheral surface of the first guide member. .

In addition, the swallower may further include a retarding means provided between the rotary plate member and the third guide member to retard the air flow generated by the plurality of blades, and the retarding means may include an upper surface of the rotary plate member It may include a plurality of barriers installed to have a height lower than the height of the plurality of wings between the lower surface of the third guide member.

In addition, the plurality of barriers may be installed so that a path of air flow passing between the rotating plate member and the third guide member is formed to be serpentine.

In addition, the plurality of barriers have different diameters, are arranged in a concentric circle shape at intervals in a radial direction around the rotational center axis of the swirler, and some of the plurality of barriers protrude upward from the upper surface of the rotating plate member. And the rest may be installed to protrude downward from the lower surface of the third guide member.

In addition, the plurality of barriers include at least two first barriers protruding upward from an upper surface of the rotating plate member and at least two second barriers protruding downward from a lower surface of the third guide member, and the at least two The first barrier and the at least two second barriers may be alternately disposed from the outer edge of the rotating plate member toward the rotational center axis.

In addition, the local exhaust device may include: an outer guide member disposed to surround an outer circumference of the swirler to guide the eddy current generated by the swirler in a direction parallel to the rotational central axis of the swirler; An inner guide member disposed inside the outer guide member to form a vortex flow passage between the outer guide member and the outer guide member through which the vortex generated by the swirler passes; And an external air guide unit installed on the outer guide member to guide air outside the outer guide member toward the vortex flowing into the box.

In addition, the external air guide unit includes: an air passage forming member installed outside the lower end of the outer guide member to form a passage between the outer guide member and the air inside the box; And a plurality of air guide members installed between the outer guide member and the air passage forming member to guide the air inside the box in a direction parallel to the rotational center axis of the swirler.

In addition, the air passage forming member has a cylindrical shape extending in a direction parallel to the rotational center axis of the swirler while surrounding the outer circumferential surface of the outer guide member, and is disposed to be spaced apart from the outer circumferential surface of the outer guide member, and the plurality of The air guide member has a plate shape elongated in a direction parallel to the rotational center axis of the swirler, and may be disposed at regular intervals along the outer peripheral surface of the outer guide member.

In addition, the local exhaust device may further include a first air supply device installed inside the box to supply the air in the box toward the plurality of wings of the swallower.

In addition, the local exhaust device may further include a second air supply device installed inside the box to supply air inside the box to the external air guide unit.

In addition, the opening of the box may have a substantially semicircular shape by being partially covered by a blanking plate.

In addition, inside the box, a first partition may be installed in parallel with the front wall between the front wall of the box and the vortex discharge end in the direction of the rotation center axis of the swirler,

A first gap is formed between the first compartment and the front wall, a second gap is formed between the first compartment and the vortex discharge end, and the first gap and the second gap communicate with the auxiliary exhaust port, At least some of the eddy current and external air introduced into the box may be discharged to the outside of the box through the auxiliary exhaust port through the first and second intervals.

In addition, the first partition may be fixed to sidewalls of the box, and a semicircular recess formed concave at a lower edge of the first partition may be formed concentrically with an opening formed in the front wall of the box.

In addition, a radius of the concave portion may be smaller than a radius of the opening and larger than a radius of the vortex discharge end portion.

In addition, the first interval may be smaller than the second interval.

In addition, two first partitions may be arranged in parallel with each other at intervals, and the concave portions of each of the two first partitions may have different radii from each other.

In addition, inside the box, a second partition may be installed in parallel with the first partition between the rear wall of the box and the first partition in the direction of the rotational center axis of the swallower, and the second partition is the box The upper space of the inner space of the box may be divided into a front space between the front wall of the box and the second partition, and a rear space between the rear wall of the box and the second partition.

In addition, the upper edge and both side edges of the second partition are fixed to the side walls of the box, and a semicircular recess formed in a concave shape is formed at the lower edge of the second partition, and the inner circumferential surface of the recess is formed of the outer guide member. It can be tightly fixed to the outer peripheral surface.

In addition, the local exhaust device may be installed so that the rotational central axis of the swirler is horizontal, and the local exhaust device passes under the swallower from inside the box, and the suction port faces the front of the box. An additional exhaust pipe installed to be opened may be further provided, and the additional exhaust pipe may suck and discharge contaminated air through the inlet.

In addition, a plurality of swallowers may be installed side by side in the box, and the openings may be formed on one wall of the box at a portion corresponding to the vortex discharge end of each of the plurality of swirlers.

In addition, two adjacent ones among the plurality of swallowers rotate in opposite directions, and a vortex guide member for guiding the flow of vortices generated in each of the two adjacent ones is disposed between the two adjacent ones. I can.

According to the local exhaust device according to embodiments of the present invention, the eddy current formed by the swallower spreads sideways and flows into the box surrounding the swallower. Accordingly, the exhaust flow of the polluted air generated in the pollutant generation area can be stably moved toward the exhaust pipe without being directly affected by the eddy current, so there is an advantage that the exhaust efficiency can be further improved.

1 is a schematic diagram showing a local exhaust system according to an embodiment of the present invention.
2 is a perspective view of the swallower shown in FIG. 1 viewed from above.
3 is a perspective view of the swallower shown in FIG. 1 viewed from below.
FIG. 4 is a perspective view of the local exhaust device shown in FIG. 1 as viewed from the outside of the box, and shows an example installed so that the rotation center axis of the swallower is horizontal.
5 is a perspective view illustrating an example in which a first air supply device is installed in the swallower shown in FIG. 2.
6 is a schematic diagram showing a local exhaust device according to another embodiment of the present invention.
7 is a perspective view of an inner guide member, an outer guide member, and an external air guide unit shown in FIG. 6 as viewed from above.
FIG. 8 is a perspective view of the local exhaust device shown in FIG. 6 as viewed from the outside of the box, and shows an example installed so that the rotation center axis of the swallower is horizontal.
9 is a perspective view illustrating a second air supply device for the external air guide unit shown in FIG. 7.
FIG. 10 is a perspective view illustrating an example in which a shielding plate is installed in an opening of a box of the local exhaust apparatus shown in FIG. 8.
11 is a schematic diagram showing an example in which a first partition and a second partition are installed inside the box of the local exhaust system shown in FIG. 10.
12A is a perspective view showing the first and second partitions shown in FIG. 11 separated from the box, and FIG. 12B is a perspective view illustrating a modified example of the first partition illustrated in FIG. 12A.
13 is a schematic cross-sectional view illustrating the local exhaust device shown in FIG. 11 by cutting it vertically along a rotational central axis.
14 is a partial cross-sectional view illustrating an example in which two first partitions are installed in the local exhaust system shown in FIG. 13.
15 is a schematic cross-sectional view showing a modified example of the local exhaust device shown in FIGS. 11 and 13.
16 is a perspective view showing an example in which two squallers are horizontally installed in one box.
17 is a schematic perspective view showing an example in which a plurality of local exhaust devices are vertically installed.
18 is a schematic vertical cross-sectional view taken along line BB′ shown in FIG. 17.

Hereinafter, a local exhaust apparatus according to embodiments of the present invention will be described with reference to the accompanying drawings. In the following drawings, the same reference numerals denote the same elements.

1 is a schematic diagram showing a local exhaust device according to an embodiment of the present invention, FIG. 2 is a perspective view of the swallower shown in FIG. 1 as viewed from above, and FIG. 3 is a view of the swallower shown in FIG. 1 from below. It is a perspective view, and FIG. 4 is a perspective view of the local exhaust device shown in FIG. 1 as viewed from the outside of the box, and shows an example installed so that the rotation center axis of the swallower is horizontal.

As shown in FIG. 1, the local exhaust device 100 according to the present invention may be installed such that the rotational central axis C of the swirler 120 is vertical. In addition, as shown in FIG. 4, the local exhaust device 100 according to the present invention may be installed such that the rotational central axis C of the swirler 120 is horizontal. On the other hand, although not shown, in the local exhaust device 100 according to the present invention, the rotation center axis C of the swallower 120 may be installed inclined at a predetermined angle. Hereinafter, for simplicity, clarity, and convenience of explanation, the local exhaust device 100 according to the present invention is illustrated and described based on an example in which the rotational central axis C of the swirler 120 is vertical. I will do it. However, in Figure 4, in order to more clearly show the local exhaust device 100 according to the present invention, the local exhaust device 100 in a state in which the rotational central axis C of the swallower 120 is horizontal. Shows.

1 to 4 together, the local exhaust device 100 according to an embodiment of the present invention is disposed near the inlet of the driving unit 110 and the exhaust pipe 101 to generate a vortex Fs by rotating. It is configured to include a swallower 120, a box 140 surrounding the swirler 120, and an exhaust fan 148 as an exhaust means installed in the box 140.

Specifically, the exhaust pipe 101 is a pipe for inhaling polluted air through an inlet at one end thereof and discharging it to the outside, and may be formed of various types of pipes such as a generally known flexible pipe or a metal pipe. The exhaust pipe 101 may be inserted into the box 140 by passing through the rear wall 140b of the box 140 from the outside of the box 140. And, the contaminated air can be sucked into the exhaust pipe 101 by a natural negative pressure, and also into the exhaust pipe 101 by an exhaust fan installed in the exhaust pipe 101, for example a sirocco fan 102. It may be forcibly inhaled. Meanwhile, the sirocco fan 102 may be installed near the inlet of the exhaust pipe 101 as shown in FIG. 1, but is not limited thereto, and may be installed near the outlet of the exhaust pipe 101.

The driving unit 110 is connected to the swirler 120 to provide a driving force for rotating the swirler 120. The driving unit 110 may include a driving motor 111 and a rotation shaft 112 connected to the driving motor 111. The driving motor 111 may be installed in the exhaust pipe 101 and may be installed inside the box 140, but is not limited thereto. For example, the drive motor 111 may be installed on the box 140 or a separate support bracket, or may be installed outside the box 140. When the drive motor 111 is installed outside the box 140, the rotation shaft 112 may be inserted into the box 140 and coupled to the swirler 120.

The rotation shaft 112 is coupled to the rotation shaft coupling portion 127 provided in the rotation center of the rotation plate member 121 of the swirler 120, as described later. As shown in FIG. 1, when the sirocco fan 102 is installed near the inlet of the exhaust pipe 101, the drive unit 110 also serves to rotate the sirocco fan 102 together with the squaler 120. I can. On the other hand, when the sirocco fan 102 is installed near the outlet of the exhaust pipe 101, a separate drive motor for rotating the sirocco fan 102 is provided.

However, the driving unit 110 having the above-described configuration is exemplary, and may have various configurations capable of providing power to rotate the swallower 120, and the installation position thereof is not limited to the above. For example, the drive unit 110 may be installed inside or outside the box 140 by means such as a bracket, and may rotate the swallower 120 through a power transmission means such as a belt or gear.

The swallower 120 is disposed near the inlet of the exhaust pipe 101 and serves to generate a vortex Fs by rotating, and is installed inside the box 140. The swirler 120 basically has a rotating plate member 121 that is disposed near the inlet of the exhaust pipe 101 and rotates, and an air flow Fa that is installed on the rotating plate member 121 to form a vortex Fs. It includes a number of wings 130 to generate.

The rotating plate member 121 may be formed in a disk shape having a diameter larger than that of the exhaust pipe 101. The rotating plate member 121 is disposed near the inlet of the exhaust pipe 101, and an exhaust hole 122 communicating with the exhaust pipe 101 is formed in the central region of the rotating plate member 121, and polluted air is discharged from the exhaust hole. It is sucked into the exhaust pipe 101 through 122.

The rotating plate member 121 is connected to the driving unit 110 and rotated. To this end, a protruding boss-shaped rotation shaft coupling portion 127 is provided in the rotation center of the rotation plate member 121, and the rotation shaft 112 of the driving motor 111 is coupled to the rotation shaft coupling portion 127. . Specifically, the rotation shaft insertion hole 128 is vertically penetrated at the center of the rotation shaft coupling part 127, and the rotation shaft 112 of the driving motor 111 is inserted into the rotation shaft insertion hole 128 and then fixed. It is firmly coupled by screws (129). The exhaust hole 122 may be formed around the rotation shaft coupling portion 127, and the rotation shaft coupling portion 127 is a rotating plate member by a plurality of connection portions 126 crossing the exhaust hole 122 in a radial direction. It may be connected to and supported by 121.

Further, the rotating plate member 121 is provided with a cylindrical exhaust passage forming member 123 installed to surround the circumference of the exhaust hole 122 to form an exhaust passage Pe communicating with the exhaust pipe 101 Can be. The exhaust passage forming member 123 may have an inner diameter larger than the outer diameter of the exhaust pipe 10 and may be installed on the upper and lower surfaces of the rotating plate member 121. Meanwhile, the exhaust passage forming member 123 may have an outer diameter smaller than the inner diameter of the exhaust pipe 10.

The plurality of blades 130 act to generate an air flow Fa while rotating together with the rotating plate member 121, and the air flow Fa generated by the plurality of blades 130 as described above is a rotating eddy current. (Fs) is formed.

The plurality of wings 130 may be fixedly installed on the surface of the rotating plate member 121 toward the exhaust pipe 101, that is, the upper surface, and radially around the exhaust hole 122 and the exhaust passage forming member 123 Can be placed. Each of the plurality of wings 130 may have a shape erected from an upper surface of the rotating plate member 121 and extended in a radial direction. The inner ends of the plurality of wings 130 may be spaced apart from the outer circumferential surface of the exhaust passage forming member 123 by a predetermined distance. Outer ends of the plurality of wings 130 may protrude a predetermined length out of the outer edge of the rotating plate member 121. That is, the plurality of blades 130 may be formed to have an outer diameter larger than the outer diameter of the rotating plate member 121.

In addition to the rotating plate member 121 and the plurality of blades 130, various components may be added to the swirler 120. Preferably, the swallower 120 is a first guide member 131, a second guide member 132 and a third guide for guiding the air flow (Fa) generated by the plurality of wings 130 It may further include a member 133 and a retarding means for retarding the air flow (Fa).

The first guide member 131 is fixedly installed on the outer edge of the rotating plate member 121 and rotates together with the rotating plate member 121. The first guide member 131 may be formed in a cylindrical shape extending downward in parallel with the rotation center axis C from the outer edge of the rotating plate member 121. The first guide member 131 may have a constant outer diameter, and the outer diameter may be the same as the outer diameter of the rotating plate member 121.

On the other hand, as described above, when the outer ends of the plurality of wings 130 protrude a predetermined length outside the outer edges of the rotating plate member 121, the outer ends of the plurality of wings 130 are the first guide members 131 ) May be extended to the lower end of the outer peripheral surface in a direction parallel to the rotational central axis (C), and accordingly, each of the plurality of wings 130 may be formed in a "b" shape.

The second guide member 132 may be installed to surround the plurality of wings 130. The second guide member 132 may be formed in a cylindrical shape having an inner diameter larger than the outer diameter of the first guide member 131. That is, the plurality of blades 130 are fixedly installed between the first guide member 131 and the second guide member 132, and accordingly, the rotating plate member 121, the first guide member 131, and a plurality of The wings 130 and the second guide member 132 are rotated together. The lower end of the second guide member 132 may be positioned at the same height as the lower end of the first guide member 131.

The third guide member 133 may be installed to cover the upper portions of the plurality of wings 130. The third guide member 133 is attached to and fixed to the upper end of the plurality of wings 130, so that it can rotate together with the plurality of wings 130. The third guide member 133 has an inner diameter larger than the outer diameter of the exhaust passage forming member 123 and has an annular plate shape having an outer diameter larger than the outer diameter of the rotating plate member 121. In addition, the upper end of the second guide member 132 is fixedly coupled to the outer edge of the third guide member 133. Accordingly, a predetermined gap (G) is formed between the outer circumferential surface of the exhaust passage forming member 123 and the inner circumferential surface of the third guide member 133, through which external air is transferred to the rotating plate member ( 121 and the third guide member 133 may be introduced.

According to the configuration as described above, the first guide member 131, the second guide member 132, and the third guide member 133 are rotated together with the rotating plate member 121 and a plurality of blades 130. do. And, the air flow (Fa) generated by the plurality of blades 130 between the rotating plate member 121, the first guide member 131, the second guide member 132 and the third guide member 133 An air flow passage (Pa) passing through this is formed. Specifically, the third guide member 133 guides the air flow Fa passing through the air flow passage Pa in a direction orthogonal to the rotation center axis C, that is, in a horizontal direction, and the first guide member ( 131 and the second guide member 132 serve to guide the air flow Fa in a direction parallel to the rotational central axis C, that is, downward in a vertical direction in the example shown in FIG. 1.

When the plurality of blades 130 rotate, air flows from the outside of the swirler 120 as air flows into the air flow passage Pa between the rotating plate member 121 and the third guide member 133 (Fa) is created. The air flow (Fa) generated in this way is rotated by a plurality of blades 130 to form a vortex (Fs), and the vortex (Fs) formed in this way is discharged through the vortex discharge end of the swirler 120 do. At this time, the eddy current Fs is widespread by centrifugal force as it exits the lower end of the air flow passage Pa and flows into the box 140. This will be described again later.

In addition, a plurality of auxiliary blades 130a may be installed in the air flow passage Pa between the first guide member 131 and the second guide member 132. The plurality of auxiliary blades 130a are disposed at regular intervals along the outer circumferential surface of the first guide member 131, and may be alternately disposed with the plurality of blades 130. Each of the plurality of auxiliary blades 130a may be formed in a rectangular plate shape that is elongated in parallel with the rotation center axis C, that is, vertically, and the upper end thereof extends to the lower surface of the third guide member 133, and The lower end may extend to the lower end of the first guide member 131.

The plurality of auxiliary blades 130a having the above configuration serves to apply an additional rotational force to the air flow Fa passing through the air flow passage Pa, which will be described later.

The retarding means may have various forms capable of retarding the air flow Fa, and preferably, a plurality of barriers installed between the upper surface of the rotating plate member 121 and the lower surface of the third guide member 133 It can be configured to include (135, 136).

Specifically, the plurality of barriers 135 and 136 have different diameters and are arranged in a concentric circle shape at intervals in the radial direction around the rotational central axis C. The plurality of barriers 135 and 136 are at least two annular first barriers 135 protruding upward from the upper surface of the rotating plate member 121 and downward protruding from the lower surface of the third guide member 133. It may include at least two second barriers 136 of an annular shape, and the at least two first barriers 135 and at least two second barriers 136 are rotated from the outer edge of the rotating plate member 121 They can be placed alternately at intervals from each other going toward (C).

The first barriers 135 and the second barriers 136 are formed to have a height lower than the height of the wing 130, and accordingly, the upper ends of the first barriers 135 and the first guide member 133 A predetermined gap is formed between the lower surfaces of ), and a predetermined gap is formed between the lower end of the second barriers 136 and the upper surface of the rotating plate member 121. It is preferable that the height of each of the first barriers 135 and the second barriers 136 is 50% to 75% of the height of the wing 130. If the height of the first barriers 135 and the second barriers 136 is lower than 50% of the height of the wing 130, the role of retarding the air flow Fa may be insignificant, as described later. If it is higher than 75% of the height of the wing 130, the gap may be too narrow so that the air flow Fa may not pass smoothly through the gap.

The path of the air flow Fa passing between the rotating plate member 121 and the first guide member 133 by the first barriers 135 and the second barriers 136 having the configuration as described above is Since it is formed serpentinely, the airflow Fa is retarded by the first barriers 135 and the second barriers 136. As described above, when the air flow Fa is retarded by the plurality of barriers 135 and 136, the air flow Fa continues to receive force from the plurality of wings 130 during the delayed time, and as a result, the air flow ( The rotational moment of the vortex Fs formed by Fa) is further increased. When the rotational moment of the vortex Fs increases, the centrifugal force of the vortex Fs becomes stronger, and accordingly, the vortex Fs can spread more widely as it exits the lower end of the air flow passage Pa.

The box 140 is formed to surround the circumference of the swallower 120 having the above-described configuration. That is, the swallower 120 is accommodated in the box 140. As described above, the driving unit 110 may be installed inside the box 140 or outside the box 140.

The box 140 may have a rectangular parallelepiped shape, for example, as shown in FIG. 4. In the front wall 140a of the box 140 facing the vortex discharge end of the swirler 120, an opening 142 is formed in a portion corresponding to the vortex discharge end of the swirler 120, and the opening ( Contaminated air is sucked into the swallower 120 through 142.

The opening 142 of the box 140 may have a circular shape as shown in FIG. 4, but is not limited thereto. For example, as shown in FIG. 10, the opening 142 may have a substantially semicircular shape by being partially covered by a blanking plate, which will be described again with reference to FIG. 10 later.

The opening 142 of the box 140 is formed to have a diameter Dh larger than the outer diameter Ds of the vortex discharge end of the swirler 120. The diameter Dh of the opening 142 of the box 140 may be approximately 100mm to 200mm larger than the outer diameter Ds of the vortex discharge end of the swirler 120. For example, when the outer diameter Ds of the swallower 120 is approximately 360 to 420 mmm, the diameter Dh of the opening 142 may be approximately 520 mm. And, in the direction of the rotational center axis (C), the distance (H) between the front wall (140a) of the box 140 and the vortex discharge end of the swallower 120 is approximately 30mm ~ 120mm, preferably 50mm ~ 100mm , More preferably, it may be 70mm to 80mm.

The vortex Fs discharged through the lower end of the air flow passage Pa formed at the vortex discharge end of the swirler 120 is spread sideways by centrifugal force, and the wall surface of the box 140 and the swirler 120 ) Is introduced into the box 140 through the gap H between the vortex discharge ends.

It is preferable to make the inside of the box 140 into a predetermined negative pressure so that the eddy current Fs can be smoothly introduced into the inside of the box 140. To this end, at least one auxiliary exhaust port 146 is formed in the box 140, and air introduced into the box 140 (the eddy current Fs and the external air described later) are formed in the auxiliary exhaust port 146. An exhaust fan 148 may be installed as an exhaust means for discharging (including Fo) to the outside of the box 140 through the auxiliary exhaust port 146. Meanwhile, an exhaust duct may be installed instead of the exhaust fan 148 as an exhaust means, or an exhaust fan and an exhaust duct may be installed together. Specifically, the auxiliary exhaust port 146 is formed on a wall different from the front wall 140a of the box 140 in which the opening 142 is formed, and preferably the rotational central axis (C) of the swallower 120 It is formed on any one sidewall 140c of the sidewalls parallel to the. That is, the auxiliary exhaust port 146 and the exhaust fan 148 are formed on one of sidewalls 140c connected at right angles to edges of the front wall 140a of the box 140. Preferably, as shown in FIG. 4, when the local exhaust device 100 is installed such that the rotational central axis C of the swirler 120 is horizontal, the auxiliary exhaust port 146 and the exhaust fan ( 148 is formed on the upper sidewall 140c of the sidewalls of the box 140. More preferably, the auxiliary exhaust port 146 is formed on the side wall 140c of the box 142 and is disposed adjacent to the front wall 140a in which the opening 142 is formed. In this case, at least some of the vortex Fs and the external air Fo first introduced into the box 140 are not congested near the opening 142 and quickly flow toward the auxiliary exhaust port 146 and thus the exhaust fan ( Since it is discharged to the outside of the box 140 by 148, the vortex Fs and external air Fo that are subsequently introduced into the box 140 may be more smoothly introduced.

In addition, at least two of the auxiliary exhaust ports 146 may be formed at intervals, and an exhaust fan 148 may be installed at each of the at least two auxiliary exhaust ports 146.

Hereinafter, the operation of the local exhaust device 100 according to an embodiment of the present invention having the above-described configuration will be described.

Referring to FIG. 1, when the rotating plate member 121 and the plurality of blades 130 start to rotate by the driving unit 110, the air outside the swallower 120 (air inside the box 140) is The air flow Fa is generated as it is introduced into the air flow passage Pa between the member 121 and the third guide member 133. The air flow Fa forms a vortex Fs that rotates along the rotational direction of the plurality of blades 130. In addition, when the exhaust operation through the exhaust pipe 101 is performed, the polluted air in the pollutant generating region A rises toward the exhaust hole 122 formed in the rotating plate member 121 to form an exhaust flow Fe.

The air flow (Fa) is retarded by a plurality of barriers (135, 136) installed between the rotating plate member (121) and the third guide member (133), and continues to apply force from the plurality of wings (130) during the delayed time. Will be delivered. As a result, since the rotational moment of the vortex Fs formed by the air flow Fa increases, the centrifugal force of the vortex Fs increases. Accordingly, the vortex Fs is spread widely while exiting the lower end of the air flow passage Pa formed at the vortex discharge end of the swirler 120.

And, since the plurality of wings 130 extend vertically to the lower end of the outer peripheral surface of the first guide member 131, the air flow Fa forming the vortex Fs is the lower end of the air flow passage Pa Until it exits, the force is continuously received by the plurality of wings 130. Accordingly, the centrifugal force of the vortex Fs becomes stronger, so that it can be spread more widely while exiting the lower end of the air flow passage Pa.

In addition, since a plurality of auxiliary blades 130a are installed in the air flow passage Pa between the first guide member 131 and the second guide member 132, the air flow Fa forming the vortex Fs Until it exits the lower end of the air flow passage (Pa) is additionally received by a number of auxiliary blades (130a). Accordingly, since the centrifugal force of the vortex Fs becomes stronger, the vortex Fs exiting the lower end of the air flow passage Pa can be spread more widely.

As described above, the vortex Fs discharged through the lower end of the air flow passage Pa formed at the vortex discharge end of the swirler 120 is spread widely, and the front wall 140a of the box 140 and the swallower ( It can be smoothly introduced into the box 140 through the gap H between the vortex discharge ends of 120). At this time, as described above, by the exhaust fan 148 installed in the box 140, some of the vortex Fs first introduced into the box 140 is discharged to the outside of the box 140, so that the box ( 140) The eddy current Fs flowing into the inside may be more smoothly introduced into the box 140. In this way, the flow of the vortex Fs introduced into the box 140 is the rotation plate through the gap G formed between the outer circumferential surface of the exhaust passage forming member 123 and the inner circumferential surface of the third guide member 133. It is introduced into the air flow path Pa between the member 121 and the third guide member 133.

In addition, external air Fo existing near the opening 142 of the box 140 is also introduced into the box 140 along the flow of the vortex Fs flowing into the box 140. This flow of external air (Fo) surrounds the exhaust flow (Fe) and acts as an air fence to suppress the exhaust flow (Fe) from being dispersed outward. In particular, since the flow direction of the external air (Fo) is the same or similar to the direction of the exhaust flow (Fe), the flow of the external air (Fo) guides the exhaust flow (Fe) instead of obstructing the exhaust flow (Fe). It also plays a role.

In this way, most of the flow of the external air Fo introduced into the box 140 together with the flow of the vortex Fs is discharged to the outside of the box 140 by the exhaust fan 148, and the rest is the vortex Fs ) Flows into the air flow path Pa between the rotating plate member 121 and the third guide member 133 through the gap G.

If the eddy current Fs does not flow into the box 140 and descends downward, the exhaust flow Fe rising toward the exhaust pipe 101 may be affected by the vortex Fs flowing in the opposite direction. have. Accordingly, there may be a problem that the exhaust flow (Fe) becomes unstable and the exhaust efficiency decreases, and a problem that some of the exhaust flow (Fe) flows out along the flow of the eddy current (Fs) may occur. In this case, the exhaust efficiency This can be degraded.

However, as described above, in the local exhaust device 100 according to the present invention, the vortex Fs formed by the swirler 120 spreads sideways and the box 140 surrounding the swallower 120 It can flow smoothly into the interior. Therefore, the exhaust flow Fe rising toward the exhaust pipe 101 is hardly affected by the flow of the eddy current Fs in the opposite direction, but by the flow of the external air Fo rising in the same direction. It can be guided smoothly. As a result, the exhaust flow Fe of the polluted air generated in the pollutant generating region A can stably rise toward the exhaust pipe 101, so that the exhaust efficiency can be improved.

5 is a perspective view illustrating an example in which a first air supply device is installed in the swallower shown in FIG. 2.

Referring to FIG. 5, the local exhaust device 100 is installed inside the box 140 to supply the air inside the box 140 to the plurality of wings 130 of the swallower 120. 1 An air supply device 180 may be further included, and the first air supply device 180 includes a first blower 181, a first air supply duct 182, and a first connection pipe 183. Can include.

Specifically, the first blower 181 may be fixedly installed inside the box 140, specifically between the walls of the swallower 120 and the box 140, It is a device that serves to inhale and blow into the first air supply duct 182 through the first connection pipe 183.

The first air supply duct 182 is disposed outside the swirler 120 and, unlike the swirler 120, is installed to be fixed without rotating. For example, the first air supply duct 182 may be fixedly installed on the outer surface of the exhaust pipe 101, but is not limited thereto, and may be fixedly installed on the box 140 through a bracket (not shown). have. The first air supply duct 182 may have a ring shape with an air supply passage formed therein, and a gap (G) between the outer circumferential surface of the exhaust passage forming member 123 and the inner circumferential surface of the third guide member 133 It is arranged to surround and communicates with the gap G. Accordingly, the first air supply duct 182 communicates with the air flow passage Pa between the rotating plate member 121 and the third guide member 133 through the gap G.

The first connecting pipe 183 is a conduit connecting the first blower 181 and the first air supply duct 182.

Sufficient air can be supplied to the plurality of blades 130 of the swirler 120 by the first air supply device 180, so that the vortex Fs can be formed smoothly. In addition, since the first air supply device 180 sucks not only the air inside the box 140 but also some of the eddy current Fs introduced into the box 140, the vortex Fs inside the box 140 The flow of is to be made smoothly, and the flow of the subsequent vortex Fs into the box 140 can be made more smoothly.

In the local exhaust device 100 according to the present invention, the swallower 120 shown in Figs. 1 to 3 only shows a preferred example. Therefore, the local exhaust device 100 according to the present invention is not limited by the configuration of the swallower 120 shown in FIGS. 1 to 3. Accordingly, the swirler 120 used in the local exhaust device 100 according to the present invention includes a rotating plate member 121 connected to the driving unit 110 to rotate, and a vortex Fs installed on the rotating plate member 121. It has a basic configuration including a plurality of wings 130 for generating, and may optionally include various components. For example, an embodiment in which other components are added to the swallower 120 shown in FIGS. 1 to 3 is shown in the drawings below.

6 is a schematic diagram showing a local exhaust device according to another embodiment of the present invention, FIG. 7 is a perspective view of the inner guide member, the outer guide member and the outer air guide unit shown in FIG. 6 as viewed from above, and FIG. 8 is As a perspective view of the local exhaust system shown in Fig. 6 from the outside of the box, it shows an example installed so that the rotation center axis of the swallower is horizontal.

As in Figs. 1 to 4, for simplicity, clarity and convenience of explanation, Figs. 6 and 7 show a local exhaust device 100a installed so that the rotational central axis C of the swallower 120 is vertical. Is shown, and in FIG. 8, the local exhaust device 100a in a state in which the rotational central axis C of the swallower 120 is horizontal is shown.

6 to 8 together, a local exhaust device 100a according to another embodiment of the present invention is similar to the local exhaust device 100 according to the embodiment shown in FIGS. , A swirler 120 that is disposed near the inlet of the exhaust pipe 101 and rotates to generate a vortex Fs, a box 140 surrounding the circumference of the swirler 120, and the box 140 And an auxiliary exhaust port 146 formed and an exhaust fan 148 installed in the auxiliary exhaust port 146.

In addition, the local exhaust device 100a is additionally disposed to surround the outer circumference of the swirler 120 to guide the vortex Fs generated by the swirler 120, and An inner guide member disposed inside the outer guide member 150 to form a vortex flow passage Ps through which the eddy current Fs generated by the swirler 120 passes between the outer guide member 150 and the outer guide member 150 ( 160) and an air guide unit 153 installed on the outer guide member 150 to guide the air outside the swirler 120 toward the vortex Fs.

The drive unit 110, the exhaust pipe 101, the swallower 120, the box 140, the auxiliary exhaust port 146, and the exhaust fan 148 have already been described in FIGS. 1 to 4, and are not described again here.

In the embodiment shown in Figures 6 to 8, the outer guide member 150, the inner guide member 160 and the air guide unit 153 are additionally installed on the swallower 120, all of which are the box 140 ) Are placed inside.

The outer guide member 150 has a cylindrical shape extending a predetermined height in a direction parallel to the rotation center axis C, for example, a vertical direction while surrounding the outer periphery of the swirler 120. The outer guide member 150 is disposed to be spaced apart from the outer circumferential surface of the swallower 120, specifically the outer circumferential surface of the second guide member 132, and the upper end thereof is installed above the swirler 120. It may be fixed to the support member 170. Therefore, even if the swirler 120 rotates, the outer guide member 150 does not rotate.

The support member 170 may have a plate shape, for example, but is not limited thereto, and may have various shapes capable of supporting the outer guide member 150. The support member 170 may be installed to be fixed to the exhaust pipe 101 or the box 140. The swallower 120 is installed to be spaced apart from the bottom surface of the support member 170 by a predetermined distance so that rotation is not disturbed by the support member 170. An air inlet hole 172 may be formed in the support member 170 so that air can be smoothly introduced into the swirler 120.

In addition, the outer guide member 150 may be formed in a cylindrical shape having a constant diameter. In addition, the height of the outer guide member 150 may be appropriately determined, for example, within a range of about 100mm to 400mm in consideration of the distance between the swallower 120 and the pollutant source and the diameter of the swallower 120.

The outer guide member 150 having the above-described configuration allows the eddy current Fs generated by the plurality of blades 130 of the swirler 120 to be parallel to the rotational central axis C, for example, in a vertical direction. It serves as a guide.

The inner guide member 160 is disposed inside the outer guide member 150. The inner guide member 160 is installed to be fixed to the outer guide member 150, and for this purpose, the inner guide member 160 and the outer guide member 150 are spaced apart in a circumferential direction and extend in a radial direction. A plurality of connecting members 165 may be installed. In addition, the inner guide member 160 is disposed below the swirler 120 and is spaced apart from the swirler 120 by a predetermined distance so as not to interfere with the rotation of the swirler 120.

The inner guide member 160 is formed in a cylindrical shape having a diameter smaller than the diameter of the outer guide member 150, and accordingly, the swirler 120 between the inner guide member 160 and the outer guide member 150 A vortex flow path (Ps) through which the eddy current (Fs) generated by) passes is formed. As described above, the inner guide member 160 not only forms the vortex flow path Pa, but also part of the vortex Fs passing through the vortex flow path Pa is inward, that is, toward the exhaust flow Fe. It can play a role in preventing flow.

An annular fixing plate member 161 may be installed inside the inner guide member 160. The fixed plate member 161 may be horizontally disposed below the rotary plate member 121 of the swirler 120 at a predetermined interval from the rotary plate member 121.

In addition, the fixing plate member 161 is fixedly installed to the inner guide member 160. Specifically, an outer edge portion of the fixing plate member 161 may be fixed to the inner guide member 160. Accordingly, the fixing plate member 161 does not rotate like the inner guide member 160.

In addition, a hollow 162 communicating with the exhaust hole 122 formed in the rotating plate member 121 is formed in the central region of the fixing plate member 161, and the contaminated air in the exhaust region is the hollow 162 and the exhaust hole. It is sucked into the exhaust pipe 101 through 122. The fixed plate member 161 may be provided with a cylindrical exhaust passage forming member 163 installed to surround the circumference of the hollow 162 to form an exhaust passage Pe communicating with the exhaust pipe 101. . The exhaust passage forming member 163 may be installed on the upper surface of the fixing plate member 161.

And, various attempts have been made to further stabilize the exhaust flow (Fe). Among these attempts, when an air guide unit 153 having the following configuration is additionally installed on the outer guide member 150, the exhaust flow Fe is further stabilized and the exhaust efficiency is further improved. there was.

The air guide unit 153 serves to guide the air (air inside the box 140) outside the swirler 12, specifically the outside guide member 150, toward the vortex Fs. It is installed outside the lower end of the outer guide member 150.

Specifically, the air guide unit 153 may include an air passage forming member 151 and a plurality of air guide members 152.

The air passage forming member 151 has a cylindrical shape extending a predetermined height in a direction parallel to the rotation center axis C, for example, a vertical direction while surrounding the lower end of the outer circumferential surface of the outer guide member 150. The air passage forming member 151 is disposed to be spaced apart from the outer circumferential surface of the outer guide member 150 by a predetermined distance, and accordingly, between the outer guide member 150 and the air passage forming member 151, the swirler 120 A passage through which the air of the air passes is formed.

The plurality of air guide members 152 are installed between the outer guide member 150 and the air passage forming member 151 to transfer air outside the swirler 120 in a direction parallel to the rotational central axis C, for example While guiding in the vertical direction, it serves to allow external air to flow toward the vortex Fs, and may have a plate shape extending in a direction parallel to the rotation center axis C, for example, in a vertical direction. For example, the plurality of air guide members 152 may be disposed along the outer circumferential surface of the outer guide member 150 at regular intervals from each other.

When the local exhaust apparatus 100a shown in FIGS. 6 to 8 having the above-described configuration is operated, air flow is formed outside the outer guide member 150 by the rapid flow of the vortex Fs. At this time, the air inside the box 140 is introduced into the passage between the air passage forming member 151 and the outer guide member 150 of the air guide unit 153 by the second air supply device 190 , The air introduced into the passage is guided by the air guide member 152 in a direction parallel to the rotational central axis C of the swirler 120, that is, in a vertical direction, and flows toward the vortex Fs. The flow of air is discharged through the lower end of the vortex flow passage (Pa) and merges with the vortex (Fs) that spreads sideways. Accordingly, the eddy current Fs is introduced into the box 140 while being gently changed in direction under the influence of the flow of air by the air guide unit 153. In other words, the eddy current Fs shown in FIG. 1 is relatively sharply bent while exiting the lower end of the air flow path Pa and flows into the box 140, whereas the vortex Fs shown in FIG. 6 is As it exits the lower end of the vortex flow passage (Pa), it may be introduced into the box 140 while being bent relatively gently and roundly under the influence of the flow of external air.

The present applicant, through a number of experiments, found that according to the air guide unit 153 having the above configuration, the exhaust flow Fe is more stabilized and the exhaust efficiency is improved compared to the embodiment shown in FIG. .

9 is a perspective view illustrating a second air supply device for the external air guide unit shown in FIG. 7.

Referring to FIG. 9, the local exhaust device 100a according to the present embodiment is installed inside the box 140 to supply the air inside the box 140 to the external air guide unit 153. An air supply device 190 may further be included, and the second air supply device 190 includes a second blower 191, a second air supply duct 192, and a second connection pipe 193. can do.

Specifically, the second blower 191 may be fixedly installed inside the box 140, specifically between the walls of the swallower 120 and the box 140, and may be provided with air inside the box 140. It is a device that serves to inhale and blow into the second air supply duct 192 through the second connector 193.

The second air supply duct 192 is disposed outside the swirler 120 and, unlike the swirler 120, is installed to be fixed without rotating. For example, the second air supply duct 192 may be fixedly installed on the outer peripheral surface of the outer guide member 150 and the outer peripheral surface of the external air passage forming member 151. The second air supply duct 192 may have a ring shape with an air supply passage formed therein, and surround the entrance of the passage between the outer circumferential surface of the outer guide member 150 and the inner circumferential surface of the air passage forming member 151 It is arranged so that it communicates with the passage.

The second connecting pipe 193 is a conduit connecting the second blower 191 and the second air supply duct 192.

Air flow by the air guide unit 153 may be sufficiently achieved by air supply by the second air supply device 190. In addition, the second air supply device 190 sucks not only the air inside the box 140 but also some of the eddy current Fs introduced into the box 140, so that the eddy current Fs inside the box 140 The flow of is to be made smoothly, and the flow of the subsequent vortex Fs into the box 140 can be made more smoothly.

Meanwhile, the local exhaust device 100a according to the embodiment shown in FIGS. 6 to 8 may further include the first air supply device 180 shown in FIG. 5. The first air supply duct 182 of the first air supply device 180 is installed above the support member 170 installed above the swirler 120, and the air inlet hole of the support member 170 It is arranged to surround 172. Accordingly, the first air supply duct 182 has an air flow path Pa between the rotating plate member 121 and the third guide member 133 through the air inlet hole 172 and the gap G. Because of communication, the air inside the box 140 may be supplied to the plurality of wings 130 of the swallower 120.

FIG. 10 is a perspective view illustrating an example in which a shielding plate is installed in an opening of a box of the local exhaust apparatus shown in FIG. 8.

Referring to FIG. 10, the local exhaust device 100a shown in FIGS. 6 to 8 may be installed in a welding workshop and used to inhale poisonous gas generated during welding. Specifically, the local exhaust device 100a is installed next to the welding work table T. In this case, the local exhaust device 100a may be installed such that the rotation center axis C is horizontal. That is, the swallower 120 in the box 140 of the local exhaust device 100a is installed such that its rotational central axis C is horizontal. Accordingly, the opening 142 formed in the box 140 faces the welding work table T. The opening 142 may be partially covered by a shielding plate 196 at a lower portion thereof so that the toxic gas generated on the welding table T can be effectively introduced, and only a portion at the upper portion thereof may be opened. Accordingly, the opening 142 may be opened in a substantially semicircular shape. In this case, the area covered by the shielding plate 196 of the total area of the opening 142 may be approximately 50% or less, and preferably approximately 45% or less.

The blanking plate 196 extends horizontally toward the swirler 120 through the opening 142 from the upper end of the first blanking plate member 196a arranged vertically and the first blanking plate member 196a It may include a second screening plate member (196b). As such, the shielding plate 196 may be formed of members 196a and 196b separate from the box 140, but is not limited thereto. For example, the shielding plate 196 may be integrally formed with the front wall 140a of the box 140.

The shielding plate 196 may also be applied to the box 140 of the local exhaust apparatus 100 according to the embodiment shown in FIGS. 1 to 4.

FIG. 11 is a schematic diagram showing an example in which the first and second partitions are installed inside the box of the local exhaust system shown in FIG. 10, and FIG. 12A is the separation of the first and second partitions shown in FIG. 11 from the box. Fig. 12B is a perspective view showing a modified example of the first partition shown in Fig. 12A, and Fig. 13 is a schematic diagram showing the local exhaust device shown in Fig. 11 vertically cut along the rotational center axis. It is a cross-sectional view.

11, 12A and 13 together, a first partition 210 and a second partition 220 may be installed in the box 140 of the local exhaust apparatus 100a according to the present invention.

The first partition 210 is in the direction of the rotational center axis C of the swallower 120, for example, in the horizontal direction in FIG. 13, the front wall 140a and the swallower 120 of the box 140 It is disposed between the vortex discharge end (Ss) of, and is disposed parallel to the front wall (140a) with a predetermined first gap (G1). The first partition 210 generally has a rectangular plate shape, and a recess 210d is formed at the lower portion thereof. Specifically, the upper edge 210a of the first partition 210 is closely fixed to the side wall 140c on which the auxiliary exhaust port 146 of the box 140 is formed, and both sides 210b of the box 140 It is tightly fixed to both side walls, and the lower edge 210c may be located at a height similar to the rotation center axis C. Accordingly, the height of the first partition 210 is lower than the height of the box 140, and is preferably approximately half the height of the box 140.

A semicircular concave portion 210d formed concave upward is formed at the lower edge 210c of the first partition 210. The center of the concave portion 210d coincides with the rotational central axis C of the swirler 120. That is, the concave portion 210d is formed concentrically with the swirler 120 and the opening 142. The radius Rp of the concave portion 210d may be smaller than the radius Rh of the opening 142, and the maximum radius Rs of the swallower 120 (in FIG. 13, the air passage forming member 151) Or the radius of the vortex discharge end (Ss)). For example, when the maximum radius Rs of the swallower 120 is 210 mm, the radius Rp of the concave portion 210d may be approximately 240 mm, and the radius Rh of the opening 142 is approximately 260 mm. I can.

As described above, the first partition 210 is disposed in parallel with the front wall 140a at a predetermined first interval G1, and the first interval G1 is in the direction of the rotational central axis C. It may be smaller than the second interval G2 between the first partition 210 and the vortex discharge end Ss. For example, when the distance H between the front wall 140a of the box 140 and the vortex discharge end Ss is 70 mm, the first distance G1 may be approximately 30 mm, and the second distance (G2) may be approximately 40mm.

The first gap G1 between the first compartment 210 and the front wall 140a and the second gap G2 between the first compartment 210 and the vortex discharge end Ss are both of the box 140 It communicates with the auxiliary exhaust port 146 formed in the side wall 142c of the. Therefore, the outside air (Fo) flowing into the box 140 through the opening 142 formed in the front wall 140a of the box 140 is separated into two flows by the first partition 210, The flows flow toward the auxiliary exhaust port 146 through the first and second intervals G1 and G2, respectively. At this time, since the first gap G1 is narrower than the second gap G2, less outside air Fo flows through the first gap G1, and more outside air Fo flows through the second gap ( G2) will flow through.

Although not shown in FIG. 12 to avoid complexity, the vortex Fs (refer to FIG. 6) introduced into the box 12 also merges with the flow of the external air Fo, and the first gap ( It flows through G1) and the second gap G2.

At least some of the external air (Fo) and vortex (Fs) flowing through the first and second gaps G1 and G2 are discharged to the outside of the box 140 through the auxiliary exhaust port 146, and the second gap Some of the external air Fo and vortex Fs flowing through (G2) flows toward the rear inside the box 140. Some of the air flowing toward the rear of the box 140 is introduced into the passage between the outer guide member 150 and the air passage forming member 151 (see FIG. 6), and the rest of the second partition 220 It is introduced toward the swallower 120 through the air inlet hole 172 (see FIG. 6) formed in the support member 170 through the lower space.

Meanwhile, the first partition 210 illustrated in FIG. 12A may be replaced with the partition 211 illustrated in FIG. 12B.

Referring to FIG. 12B, the first partition 211 has a generally arc-shaped plate shape, but a concave portion 211d is formed at the lower portion thereof. Specifically, the upper edge 211a of the first partition 211 is formed in a convex arc shape, and both ends of the upper edge 211a may be fixed to both side walls of the box 140. A semicircular concave portion 211d formed concave upward is formed at the lower edge 211c of the first partition 211. The center of the concave portion 211d coincides with the rotational central axis C of the swirler 120. That is, the concave portion 211d is formed concentrically with the swirler 120 and the opening 142. A detailed description of the concave portion 211d is the same as that of the concave portion 210d of the first partition 210 illustrated in FIG. 12A.

Again, referring to FIGS. 11, 12A and 13 together, the second partition 220 is in the direction of the rotational central axis C of the swallower 120, for example, the box 140 in the horizontal direction in FIG. 13. ) Is disposed between the rear wall 140b and the first partition 210, and is disposed in parallel with each of the rear wall 140b and the first partition 21 at a predetermined interval. The second partition 220 has a generally rectangular plate shape, and a concave portion 220d is formed at the lower portion thereof. Specifically, the upper edge 220a of the second partition 220 is tightly fixed to the side wall 140c on which the auxiliary exhaust port 146 of the box 140 is formed, and both sides 220b of the box 140 It is tightly fixed to both side walls, and the lower edge 220c may be located at a height similar to the rotational central axis C. Accordingly, the height of the second partition 220 is lower than the height of the box 140, and is preferably approximately half the height of the box 140.

The lower edge 220c of the second partition 220 has a semicircular recess 220d formed to be concave upward. The inner circumferential surface of the concave portion 220d is closely fixed to the outer circumferential surface of the outer guide member 150. Accordingly, the radius of the concave portion 220d coincides with the radius of the outer peripheral surface of the outer guide member 150.

The second partition 220 includes an upper space of the inner space of the box 140, a front space between the front wall 140a and the second partition 220 of the box 140, and the rear wall of the box 140 ( 140b) and the second partition 220 in the rear space.

Among the inner spaces of the box 140, a lower space located below the second partition 220 is not separated by the second partition 220. Therefore, as described above, some of the external air Fo introduced into the upper space inside the box 140 through the second gap G2 formed by the first partition 210 is in the second partition 220 Swallow through the air inlet hole 172 (see Fig. 6) formed in the support member 170 located in the space behind the second partition 220, passing through the space below the second partition 220 and not flowing horizontally. It is introduced toward the ru 120. On the other hand, air introduced into the box 140 without passing through the second gap G2 formed by the first partition 210, that is, the blanking plate 196, in particular, the second blanking plate member 196b extending horizontally. The external air (Fo) introduced into the lower space inside the box 140 through both sides of) flows approximately horizontally, and the air inlet holes 172 formed in the support member 170 located in the space behind the second partition 220 ) (See FIG. 6) may be introduced toward the swallower 120. In addition, some of the external air (Fo) introduced into the lower space inside the box 140 is a passage between the outer guide member 150 and the air passage forming member 151 located in the space in front of the second partition 220 It is introduced into the interior (see Fig. 6).

Applicant, through many experiments, when installing the first partition 210 and the second partition 220 in the box 140, external air (Fo) is more smoothly introduced into the box 140 , The flow of external air (Fo) from the inside of the box 140 is made smoothly, and air supply toward the swallower 120 through the air inlet hole 172 formed in the support member 170 and the outer guide member 150 It was found that air supply into the passage between) and the air passage forming member 151 is also made smoothly. Due to this, the air fence formed by the flow of the outside air Fo is formed in a better shape, and as a result, the exhaust flow Fe can be more stable.

14 is a partial cross-sectional view illustrating an example in which two first partitions are installed in the local exhaust system shown in FIG. 13.

Referring to FIG. 14, in the direction of the rotational central axis (C) of the swirler 120, two first partitions between the front wall 140a of the box 140 and the vortex discharge end Ss of the swirler 120 (210, 210') may be arranged parallel to each other at intervals. The two first partitions 210 and 210 ′ have the shape shown in FIG. 12A, but may be replaced with two first partitions 211 having the shape shown in FIG. 12B.

Specifically, the first partition 210 is disposed in parallel with the front wall 140a at a predetermined first interval G11, and the first partition 210 ′ has a predetermined distance from the first partition 210 Are arranged in parallel with the first interval G12 of. As described above, since the two first partitions 210 and 210 ′ are disposed between the front wall 140a of the box 140 and the vortex discharge end Ss, the front wall 140a of the box 140 The interval H between the and the vortex discharge end Ss is wider than the interval H illustrated in FIG. 13, and may be, for example, approximately 120 mm. In this case, the two first gaps G11 and G12 may be approximately 30 mm, respectively, and the second gap G2 may be approximately 60 mm.

In addition, a radius Rp1 of the concave portion 210d of the first partition 210 and a radius Rp2 of the concave portion of the first partition 210 ′ may be smaller than a radius Rh of the opening 142, , It may be larger than the maximum radius (Rs) of the swallower 120. For example, when the maximum radius Rs of the swallower 120 is 210 mm, the radius Rp1 of the concave portion of the first partition 210 may be approximately 240 mm, and the concave portion of the first partition 210 ′ The radius Rp2 may be approximately 220 mm, and the radius Rh of the opening 142 may be approximately 260 mm.

The present applicant, through many experiments, when installing the two first partitions (210, 210') in the box 140, the outside air (Fo) more smoothly flows into the box 140, thereby It has been found that the air fence formed by the flow of external air Fo is formed in a better shape, and as a result, the exhaust flow Fe is more stable.

15 is a schematic cross-sectional view showing a modified example of the local exhaust device shown in FIGS. 11 and 13.

The local exhaust device 100a illustrated in FIG. 15 has a configuration in which two first partitions 210 and 210' and an additional exhaust pipe 240 are added to the configuration of the local exhaust device illustrated in FIG. 13. Since the two first partitions 210 and 210 ′ are the same as those shown in FIG. 13, only the additional exhaust pipe 240 will be described below.

The local exhaust device 100a may be installed such that the rotational center axis C of the swallower 120 is horizontal, and the pollutant generation area A is in front of the front wall 140a of the box 140. It is arranged to be located.

The additional exhaust pipe 240 may be disposed below the swallower 120. Specifically, the additional exhaust pipe 240 passes through the rear wall 140b of the box 140 from the outside of the box 140 and is inserted into the box 140, and then the suction port 241 of the box 140 It opens toward the front. An exhaust fan, such as a sirocco fan (not shown), is installed in the additional exhaust pipe 240, and thus contaminated air can be sucked through the inlet 241 of the additional exhaust pipe 240.

The polluted air generated in the pollutant generation area (A) located in front of the box 140 flows into the box 140 through the opening 142 formed in the front wall 140a of the box 140, (Fe) is formed, and this exhaust flow (Fe) is sucked into the swirler 120 and discharged through the exhaust pipe 101. In addition, the exhaust flow Fe generated near the front wall 140a of the box 140 may be sucked through the intake port 241 of the additional exhaust pipe 240 and discharged through the additional exhaust pipe 240.

As described above, the additional exhaust pipe 240 serves to improve the overall exhaust efficiency by inhaling and discharging the polluted air near the intake port 241. In particular, the additional exhaust pipe 240 lowers the pressure near the intake port 241 to form a negative pressure. Accordingly, the exhaust flow Fe rising from the pollutant generating region A far from the intake port 241 is naturally bent toward the swallower 120 due to the negative pressure near the intake port 241, and the inside of the swirler 120 Inflow into the furnace becomes easy. In addition, the air fence formed by the flow of external air (Fo) flowing into the box 140 is also lowered further downward by the negative pressure below, so that the air fence is generally formed closer to the horizontal and longer. I can. Accordingly, the exhaust flow (Fe) rising from the pollutant generation area (A) can be more smoothly guided toward the swallower 120 by this air fence, and in particular, the polluted air far away from the swallower 120 is also Guided by a longer air fence, it can be smoothly sucked into the swallower 120.

In particular, as a result of experimenting with the local exhaust system 100a having the configuration shown in FIG. 15 by the present applicant, the exhaust flow of contaminated air generated at a position approximately 2m horizontally away from the opening 142 of the box 140 ( Fe) was also found to be smoothly sucked into the local exhaust device 100a.

On the other hand, when the pollutant generation area is relatively wide, for example, a plating factory, a tire manufacturing plant, a semiconductor manufacturing plant, a welding workshop, an automobile parts manufacturing plant, a soldering workshop, a food manufacturing plant, etc. When a large amount of air contaminated by pollutants such as dust or odor is generated, it is difficult to sufficiently exhaust the large amount of contaminated air with only one local exhaust device. In this case, it is possible to efficiently exhaust contaminated air generated in a wider area by installing two or more local exhaust devices 100 and 100a according to the present invention.

For example, a plurality of local exhaust devices 100 and 100a may be attached to each other to be installed or may be installed at intervals from each other. In addition, the boxes 140 of a plurality of local exhaust devices 100 and 100a may be integrated with each other. In other words, a plurality of swallowers 120 may be installed side by side in one integrated box 140, in this case, the opening 142 may be formed for each of the plurality of swallowers 120. In addition, the openings 142 formed in this way may be connected to each other. In addition, depending on the installation location of the local exhaust devices 100 and 100a or the generation of contaminated air, a part of the opening 142 of the box 140 may be covered with a blanking plate 196 or the like.

FIG. 16 is a schematic perspective view showing an example in which the plurality of local exhaust devices 100a are integrated, and an example in which two swallowers 120 are horizontally installed in one box 140.

Referring to FIG. 16, the local exhaust device 100a may be installed in, for example, a welding workshop and used to inhale toxic gas generated during welding. Specifically, a box 140 is installed next to the welding work table T, and two swallowers 120 are installed side by side in the box 140. In this case, the local exhaust device 100a may be installed such that the rotation center axis C is horizontal. That is, the two swallowers 120 are installed so that their rotational central axis C is horizontal, and accordingly, the opening 142 formed in the box 140 faces the welding work table T. . Two openings 142 are formed in a portion corresponding to the vortex discharge end of each of the two swirlers 120, but the two openings 142 may be connected to each other. In addition, a portion of the openings 142 may be partially covered by a blanking plate 196, respectively.

If the two swirlers 120 rotate in the same direction, the vortices between the two swirlers 120 rotate in a direction facing each other and collide, thereby generating turbulence and smooth exhaust Flow can be disrupted. Therefore, in the present invention, the two swallowers 120 are opposite to each other so that the eddy currents generated in each of the two swallowers 120 rotate in the same direction between the swirlers 120 It is preferable to be installed to rotate in the direction.

In addition, a vortex guide member 198 for smoothly guiding the flow of vortices generated by each of the swirlers 120 may be disposed between the two swallowers 120. In other words, the vortex guide member 198 suppresses collision of vortices discharged through the vortex discharge ends of each of the two swirlers 120, and the vortices are between the box 140 and the swallower 120. By guiding to smoothly flow into the box 140 through the gap of, as a result, it helps to form a smooth exhaust flow.

FIG. 17 is a schematic perspective view illustrating an example in which a plurality of local exhaust devices 100 and 100a are integrated, and FIG. 18 is a schematic perspective view showing an example in which a plurality of local exhaust devices 100a are vertically installed. It is a schematic vertical cross-sectional view along line BB' indicated in.

Referring to FIGS. 17 and 18 together, contaminated air generated in a relatively large work area can be efficiently exhausted by using a plurality of local exhaust devices 100a according to the present invention. The plurality of local exhaust devices 100a are installed on an area where contaminants are generated, for example, a relatively wide and open upper work table T', so that in a wide area on the work table T' Polluted air generated can be exhausted.

Specifically, the plurality of local exhaust devices 100a are vertically disposed above the work table T'at a predetermined distance from the work table T', respectively. That is, the plurality of local exhaust devices 100a are installed so that their rotational central axis C is vertical, and accordingly, the opening 142 of the box 140 faces the work table T'located below. .

The plurality of local exhaust devices 100a are disposed along the periphery of the work table T', and are disposed at a predetermined distance upward from the upper surface of the work table T'. For example, as shown in FIG. 15, if the upper surface of the work table T'is rectangular, the plurality of local exhaust devices 100a are also arranged in a rectangular shape.

The blanking plate 196 may be installed in the opening 142 of the box 140 of each of the plurality of local exhaust devices 100a. The shielding plates 196 may be installed to cover a portion of the space surrounded by the plurality of local exhaust devices 100a of the openings 142 of each box 140 of the plurality of local exhaust devices 100a.

A blocking plate 230 may be installed horizontally at a height corresponding to the height of the blocking plates 196 in the space surrounded by the plurality of local exhaust devices 100a, and the blocking plate 230 is It serves to block the exhaust flow Fe rising from the table T'from escaping to the outside through the space surrounded by the plurality of local exhaust devices 100a.

In the plurality of local exhaust devices 100a arranged as described above, as described above, the outside air Fo into the box 140 through the opening 142 of each local exhaust device 100a. Flow is introduced. This flow of external air (Fo) surrounds the exhaust flow (Fe) and acts as an air fence to suppress the exhaust flow (Fe) from being dispersed outward. Since an air fence made of external air Fo is formed in each of the plurality of local exhaust devices 100a, these air fences are continuously connected to surround the entire work table T'. Accordingly, since the exhaust flow Fe rising from the work table T'is suppressed from being released to the outside by the air fence, most of it can be introduced into the plurality of local exhaust devices 100a. As a result, the efficiency of exhausting polluted air to a relatively large area can be improved.

Meanwhile, the present invention has been described above with reference to the local exhaust devices shown in FIGS. 10 or 11 with reference to FIGS. 16 to 18, but other local exhaust devices according to various embodiments of the present invention are also shown. It may be arranged as shown in 16-18.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those of ordinary skill in the art will appreciate that various modifications and other equivalent embodiments are possible therefrom. Therefore, the true scope of protection of the present invention should be determined by the appended claims.

100,100a...Local exhaust system 101...Exhaust pipe
102...Sirocco fan 110...
111...drive motor 112...rotary shaft
120...Swaler 121...Rotating plate member
122...Exhaust hole 123...Exhaust passage forming member
126...Connection 127...Rotary shaft coupling
128...Rotary shaft insertion hole 129...Set screw
130... wing 130a... secondary wing
131...first guide member 132...second guide member
133...3rd guide member 135...1st barrier
136...second barrier 140...box
142... opening 146... auxiliary exhaust
148...exhaust fan 150...outer guide member
151...Air passage forming member 152...Air guide member
153...air guide unit 160...inner guide member
161...fixing plate member 162...hollow
163...Exhaust passage forming member 165...Connecting member
170...support member 172...air inlet hole
180...first air supply 181...first blower
182...1st air supply duct 183...1st connector
190...second air supply 191...second blower
192...2nd air supply duct 193...2nd connector
196...Blanking plate 198...Vortex guide member
210,210',211...the first partition 220...the second partition
230...blocking plate 240...additional exhaust pipe

Claims (28)

Driving unit;
A rotating plate member connected to the driving unit and having an exhaust hole communicating with the exhaust pipe in a central region, which is disposed near the inlet of the exhaust pipe and rotates by the driving unit, and is installed in the rotating plate member together with the rotating plate member. A swallower including a plurality of blades for generating an air flow forming the vortex while rotating; And
Includes; a box accommodating the swallower therein,
An opening is formed in a portion corresponding to the vortex discharge end on a front wall of the box facing the vortex discharge end of the swirler, and the vortex discharge end of the swirler is inside of the box from the front wall of the box where the opening is formed. It is disposed in a retracted position, and a gap is formed between the vortex discharge end of the swirler and the front wall in which the opening of the box is formed in front of the vortex discharge end of the swirler along the rotational center axis of the swirler. The eddy current generated by the swirler and discharged through the vortex discharge end is introduced into the box through the gap, and external air of the box is also introduced into the box through the opening and the gap,
An auxiliary exhaust port is formed on one of the side walls of the box, and the auxiliary exhaust port includes an exhaust means for discharging at least a portion of the vortex and external air introduced into the box to the outside of the box through the auxiliary exhaust port. Local exhaust device, characterized in that installed. The method of claim 1,
The auxiliary exhaust port is disposed adjacent to a front wall of the box in which the opening is formed. The method of claim 1,
At least two of the auxiliary exhaust ports are formed at intervals, and the exhaust means is installed in each of the at least two auxiliary exhaust ports. The method of claim 1,
The local exhaust device, characterized in that the diameter of the opening is larger than the outer diameter of the vortex discharge end of the swirler. The method of claim 1,
The local exhaust device, wherein the exhaust means is an exhaust fan and/or an exhaust duct. The method of claim 1,
The swirler is provided to surround the first guide member in a cylindrical shape installed at the outer edge of the rotating plate member and the outer ends of the plurality of blades to form an air flow path between the first guide member. And a second guide member having a cylindrical shape and a third guide member installed to cover upper portions of the plurality of blades. The method of claim 6,
The plurality of blades are radially disposed on the upper surface of the rotating plate member, and outer ends of the plurality of blades protrude out of the outer circumferential surface of the rotating plate member and extend long to the lower end of the outer peripheral surface of the first guide member. Local exhaust system. The method of claim 6,
The swallower further comprises a retarding means provided between the rotating plate member and the third guide member to retard the air flow generated by the plurality of blades. The method of claim 8,
Wherein the retarding means includes a plurality of barriers installed between the upper surface of the rotating plate member and the lower surface of the third guide member to have a height lower than that of the plurality of blades. The method of claim 9,
The plurality of barriers are installed such that a path of air flow passing between the rotating plate member and the third guide member is formed in a serpentine manner. The method of claim 10,
The plurality of barriers have different diameters and are arranged in a concentric circle shape at intervals in a radial direction around a rotational central axis of the swirler,
Some of the plurality of barriers are installed to protrude upward from the upper surface of the rotating plate member, and the rest are installed to protrude downward from the lower surface of the third guide member. The method of claim 11,
The plurality of barriers include at least two first barriers protruding upward from an upper surface of the rotating plate member and at least two second barriers protruding downward from a lower surface of the third guide member, and the at least two first The barrier and the at least two second barriers are alternately disposed from an outer edge of the rotating plate member toward a rotational center axis. The method of claim 1,
An outer guide member disposed to surround the outer circumference of the swirler to guide the eddy current generated by the swirler in a direction parallel to the rotational center axis of the swirler;
An inner guide member disposed inside the outer guide member to form a vortex flow passage between the outer guide member and the outer guide member through which the vortex generated by the swirler passes; And
And an external air guide unit installed on the outer guide member to guide the air outside the outer guide member toward a vortex flowing into the box. The method of claim 13,
The external air guide unit,
An air passage forming member installed outside the lower end of the outer guide member to form a passage through which the air inside the box passes between the outer guide member and the outer guide member;
And a plurality of air guide members installed between the outer guide member and the air passage forming member to guide the air inside the box in a direction parallel to the rotational center axis of the swirler. . The method of claim 14,
The air passage forming member has a cylindrical shape extending in a direction parallel to the rotational center axis of the swirler while surrounding the outer peripheral surface of the outer guide member, and is disposed to be spaced apart from the outer peripheral surface of the outer guide member,
The plurality of air guide members have a plate shape elongated in a direction parallel to the rotational central axis of the swirler, and are disposed at regular intervals along the outer peripheral surface of the outer guide member. The method of claim 1 or 13,
And a first air supply device installed inside the box and supplying the air inside the box toward the plurality of wings of the swirler. The method of claim 13,
And a second air supply device installed inside the box and supplying the air inside the box to the external air guide unit. The method of claim 1 or 13,
The local exhaust device, characterized in that the opening of the box is partially covered by a blanking plate to have a substantially semicircular shape. The method of claim 13,
Inside the box, a first partition is installed in parallel with the front wall between the front wall of the box and the vortex discharge end in the direction of the rotation center axis of the swirler,
A first gap is formed between the first compartment and the front wall, a second gap is formed between the first compartment and the vortex discharge end, and the first gap and the second gap communicate with the auxiliary exhaust port, At least a portion of the eddy current and the external air flowing into the box is discharged to the outside of the box through the auxiliary exhaust port through the first and second intervals. The method of claim 19,
The first partition is fixed to sidewalls of the box, and a semicircular recess formed at a lower edge of the first partition is formed concentrically with an opening formed in the front wall of the box. The method of claim 20,
The local exhaust device, wherein a radius of the concave portion is smaller than a radius of the opening and larger than a radius of the vortex discharge end. The method of claim 19,
The local exhaust apparatus, wherein the first interval is smaller than the second interval. The method of claim 22,
The local exhaust device, wherein two of the first partitions are arranged in parallel at intervals from each other, and the concave portions of each of the two first partitions have different radii from each other. The method of claim 19,
Inside the box, a second partition is installed parallel to the first partition between the rear wall of the box and the first partition in the direction of the rotational center axis of the swallower,
The second partition divides the upper space of the inner space of the box into a front space between the front wall of the box and the second partition, and a rear space between the rear wall of the box and the second partition. Device. The method of claim 24,
The upper edge and both side edges of the second partition are fixed to the side walls of the box, and a semicircular recess formed in a concave shape is formed at the lower edge of the second partition, and the inner circumferential surface of the recess is on the outer peripheral surface of the outer guide member. Local exhaust device, characterized in that the tightly fixed. The method according to any one of claims 1, 13, or 19,
The local exhaust device is installed so that the rotation center axis of the swirler is horizontal,
The local exhaust system further includes an additional exhaust pipe installed to pass under the swallower in the box and open the inlet toward the front of the box, and the additional exhaust pipe inhales polluted air through the inlet. Local exhaust device, characterized in that to discharge. The method of claim 1 or 13,
A local exhaust apparatus, characterized in that a plurality of swallowers are installed side by side in the box, and the openings are formed in a portion corresponding to a vortex discharge end of each of the plurality of swirlers on one wall of the box. The method of claim 27,
Two adjacent ones among the plurality of swallowers rotate in opposite directions, and a vortex guide member for guiding the flow of vortices generated in each of the two adjacent ones is disposed between the two adjacent ones. Local exhaust system.

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