WO2014119813A1

WO2014119813A1 - Swirl-type fan ventilator

Info

Publication number: WO2014119813A1
Application number: PCT/KR2013/000908
Authority: WO
Inventors: 최흥원
Original assignee: (주)토네이도테크
Priority date: 2013-02-04
Filing date: 2013-02-05
Publication date: 2014-08-07
Also published as: KR101259586B1

Abstract

The present invention relates to a swirl-type ventilator, and more specifically, a swirl-type fan ventilator, wherein a swirler fan has a rotary plate and blades and generates swirl by the rotation thereof so as to induce a pressure difference and the air flow direction, thereby rapidly and efficiently introducing the air including external pollution sources or the like into a housing. The introduced air of the pollution sources rapidly and easily moves in the direction of an exhaust pipe by a suction fan which is provided on the same shaft as a fixed bell mouth and rotates so as to maximize the exhaust efficiency. The outside edge of the bell mouth is a curved surface which is curved in the direction of the swirler fan and the inside edge thereof forms a curved surface which is curved in the direction of the suction fan so as to increase the flow speed. Stepped portions in the height direction and the thickness direction are formed so as to facilitate the generation of the swirl and guides are provided to the outer walls of the blades of the swirler fan such that the air including the pollution sources or the like and partially dispersed by the rotation force of the blades is introduced into the housing. The swirl-type fan ventilator, according to the present invention, comprises: a housing formed in a hollow shape and having an inner diameter larger at one side end portion than the other side end portion; a motor provided to the inside of the housing; a cylindrical rotation shaft provided to the motor; the swirler fan including a rotation plate provided to the rotation shaft so as to rotate and a plurality of blades disposed along the outer peripheral surface of the rotation plate and fixed in an erected state; a bell mouth surrounding the swirler fan at the lower portion of the swirler fan; and a suction fan which is provided to the rotation shaft so as to rotate, is provided at the lower portion of the bell mouth, and is formed from the combination of a plurality of individual blades which are turned at a predetermined angle with respect to a radial direction.

Description

Vortex Swallower Fan Exhaust System

The present invention relates to a vortex type exhaust device, and more particularly, consisting of a rotating plate and a blade, and generating vortices by the rotation of a swirler fan to induce a pressure difference and an air flow direction so that air including an external pollution source is introduced into the housing. The air flows into the pollutant source quickly and efficiently, and it is installed on the same axis as the fixed bell mouse and is moved quickly and easily in the direction of the exhaust pipe by the rotating suction fan. The edge is curved in the direction of the swirler and the inner edge is curved in the direction of the suction fan to increase the flow rate, and to form the step in the height direction and the step in the thickness direction to facilitate the generation of vortex, Guides are installed on the outer wall of the wing to be partially dissipated by wing rotational force It relates to a swirl swirler exhaust device for introducing air into the housing, including the pollutant.

Exhaust systems, or fans, are generally used in factories, homes, restaurants, etc., where pollutants are frequently generated. The ventilator is useful when a partial source of contamination occurs on the floor away from the exhaust pipe, when it is difficult to install the exhaust pipe near the source of pollution by other installations, or when a source of pollution occurs momentarily. In addition to the source of pollution, the exhaust fan discharges odors and moisture generated in home bathrooms to the outside.

These fans have various problems in terms of performance. As the ventilator moves away from the exhaust pipe, the efficiency of removing contaminants decreases drastically. For example, if the odor and moisture in the toilet stays near the floor, it is difficult to discharge because the distance to the ceiling fan installed. In addition, a fan installed in a closed room has a problem that a tremendous noise is generated by the driving of the motor and the rotation of the fan.

For this reason, the fan is preferably installed as close as possible to the location of the generation of pollutants. However, there is a limitation in the installation conditions because it interferes with the movement of the work process and the workers and the distance between the floor and the ceiling.

In order to solve this problem, a ventilator for expanding an exhaust area using vortices has been developed. The vortex type fan installs a vortex generating fan at the inlet side of the exhaust pipe and rotates the fan. The fan generates a vortex like a donut shape around the exhaust pipe to efficiently suck contaminated air into the exhaust pipe.

However, in the case of such a vortex-type fan, the vortex should also be relatively large in proportion to the distance from the inlet of the exhaust pipe to the source of contamination so that the contaminated air can be easily sucked into the exhaust pipe. Attempts have been made to maximize the rotational force of the fan in order to increase the size of the vortex, but there is a limit and there is a problem in that the amount of power usage increases. For this reason, even if the size of the vortex is increased by maximizing the rotational force of the fan, in the existing vortex type fan structure, the source of the inhalation caused by the vortex generated by the fan is vortices and pollutants due to various structures including the motor provided between the fan and the exhaust pipe. It is reflected by this structure, and redistribution occurs in the direction of the pollutant, and the noise increases due to the turbulence caused by the mutual interference between the inflowing flow and the inflowing flow in a narrow area under the exhaust pipe, and in the space due to the flow blowing into the space. There is a problem that there is a fear of causing an additional spread of the existing pollution.

As a conventional technology for solving the above problems, Republic of Korea Patent Registration No. 10-0821295 (April 03, 2008) in the vortex type local exhaust system, is installed in the inlet of the exhaust pipe, the external power supply A swirler rotating around the exhaust pipe; And at least two vortex type local exhaust devices, including a driving unit installed in the exhaust pipe to rotate the slewer, wherein the respective vortex type local exhaust devices are rotated by the slewer. Vortex generating one side of the vortex, the swirler is arranged so as to face in the same direction, respectively, the adjacent pair of vortex type local exhaust devices are vortex type is arranged so that the areas of each of the vortex overlap each other Local exhaust systems are known.

However, although the vortex type local exhaust system is provided with a plurality of intakes to suck a large amount of contaminated air, there is a problem in that the amount of power usage increases, and various structures including a motor member provided with a pollutant between a fan and an exhaust pipe. Therefore, there is a problem in that the vortex and the pollutant are reflected on the structure, and thus re-export occurs in the pollutant direction, and the flow rate drops sharply during the process of the pollutant introduced by the fan toward the exhaust pipe.

As another conventional technology for solving the above problems, Korean Patent Application No. 10-2012-0102049 is a vortex-type fan having a bell mouse, the inside of the hollow cylinder shape, the one end is larger than the other inside diameter Having a housing; A motor provided inside the housing; A rotating shaft mounted to the motor; A first fan including a rotating plate mounted on the rotating shaft and having an outer edge curved in the motor direction, the rotating plate having a curved shape, and a plurality of blades disposed along an outer edge of the rotating plate and fixed in a radial direction; A bell mouth surrounding the first fan at the bottom of the first fan; And a second fan mounted on the rotating shaft and provided below the bell mouse, the second fan comprising a plurality of individual wing combinations twisted at a predetermined angle with respect to the radial direction. It is.

However, the above-described conventional technique is clogged so that the amount of redistribution by the rotational force of the blade is larger than the inflow into the housing. That is, the pollutant introduced into the center portion by the first fan has a disadvantage in that the discharge force due to the blade rotational force is stronger than the suction force of the second fan installed in the housing, so that additional respreading is performed.

The present invention is to solve the above problems, in particular to allow the air including the pollutant from the outside to be introduced into the housing quickly and efficiently, the air containing the introduced pollutant and the like quickly and easily moves in the direction of the exhaust pipe exhaust In addition to maximizing efficiency, increasing flow velocity and facilitating vortex generation, vortex-type swirler exhaust that injects air into the housing, including contaminants partially dispersed by blade rotation, by installing guides on the outer wall of the swirler fan. It is a technical object to provide an apparatus.

Technical Solution The present invention proposes a swirl swirler exhaust device comprising: a housing having an inner diameter having an inner diameter larger than the other side with an empty shape; and a motor provided inside the housing; and a rotating shaft mounted to the motor; And a swirler fan mounted on the rotating shaft and rotating in a disk shape, and a plurality of wings disposed along an outer circumferential surface of the rotating plate to be fixed in an upright state; and a bell mouse surrounding the swirler fan under the swirler fan. and a suction fan mounted on the rotary shaft and provided at the lower portion of the bell mouse, the suction fan comprising a plurality of individual wing combinations twisted at a predetermined angle with respect to the radial direction.

The swirler fan is formed to partially protrude from the upper portion of the housing.

In the swirler fan, vortices are generated by the blades and the rotating plate during operation, and air containing external sources of pollutants around the swirler fan along the circumference of the swirler fan and between the blades and the blades is formed by the air pressure direction and the air flow direction by the vortex formation. Flows inside.

The swirler fan includes a guide height formed on the outer wall of the wing at a wing height of 1/4 so that air containing a pollutant source that is partially dispersed by the blade rotational force is introduced into the housing.

The wings and guides of the swirler fan form a vortex to form a straight or curved line to introduce air including a pollutant into the housing.

The angle between the guide and the blade of the swirler fan is formed at an obtuse angle.

The bell mouse is a curved surface curved in the direction of the swirler fan and the inner edge is a curved surface in the direction of the suction fan so as to surround a portion of the swirler fan, the outer edge and the inner edge are the outer and inner circumference respectively Accordingly, a plurality of steps are formed in the height direction and the thickness direction.

The upper and lower ends of the suction fan are provided with a first auxiliary plate and a second auxiliary plate for dividing the inner space of the housing, respectively.

According to the vortex-type swirler fan exhaust device according to the present invention, the swirler fan is composed of a disk-shaped rotating plate and a blade and generates a vortex by the rotation of a swirler fan provided with a guide on the wing outer wall to induce a pressure difference and an air flow direction. This allows air, including external pollutants, to flow into the housing quickly and efficiently, and the air, including introduced pollutants, moves quickly in the direction of the exhaust pipe by a suction fan that is mounted on the same axis as the fixed bell mouse and rotates. It has the effect of maximizing the exhaust efficiency.

In addition, according to the present invention, the outer edge of the bell mouse is curved in the swirler direction and the inner edge is curved in the suction fan direction, thereby increasing the flow rate, and forming a step in the height direction and a step in the thickness direction to vortex There is an effect of facilitating the generation.

In addition, according to the present invention, there is an effect that a guide may be installed on the outer wall of the swirler fan to introduce air, including a source of contamination partially dispersed by the blade rotation force, into the housing.

1 is a perspective view showing an embodiment according to the present invention.

2 is a cross-sectional view showing an embodiment according to the present invention.

Figure 3 is a perspective view of a swirler fan in one embodiment according to the present invention.

Figure 4 is a perspective view showing another embodiment of a swirler fan in one embodiment according to the present invention.

Figure 5 is a perspective view showing another embodiment of a swirler fan in one embodiment according to the present invention.

Figure 6 is a perspective view showing another embodiment of a swirler fan in one embodiment according to the present invention.

Figure 7 is a perspective view showing another embodiment of a swirler fan in one embodiment according to the present invention.

8 is a perspective view showing a bell mouse in one embodiment according to the present invention.

9 is a cross-sectional view schematically showing an embodiment according to the present invention.

According to the present invention, there is provided a vortex swirler exhaust device, comprising: a vortex swirler exhaust device proposed by the present invention; a housing having a hollow shape and having one end portion having an inner diameter larger than the other side; and a motor provided in the housing. And a rotating shaft mounted to the motor; and a rotating plate mounted on the rotating shaft to rotate, and a swirler comprising a plurality of blades fixed along the outer circumferential surface of the rotating plate and fixed in an upright state. A bell mouth surrounding the swirler pan at a lower portion thereof; and a suction fan mounted on the rotating shaft and provided at a lower portion of the bell mouse, the suction fan comprising a plurality of individual wing combinations twisted at a predetermined angle with respect to a radial direction; It is made, including.

In addition, the swirler fan is characterized in that it is formed in a form protruding from the upper portion of the housing.

In addition, the swirler fan is caused by the vortex generated by the wing and the rotating plate during operation, the air containing an external pollution source around the swirler fan and the wing and the wing along the circumference of the swirler fan by the air pressure direction and the air flow direction formed by the vortex formation Is introduced into the housing.

In addition, the swirler fan is characterized in that it comprises a guide height is formed at the wing height 1/4 on the outer wall of the wing so as to introduce the air containing the pollutant, which is partly dispersed by the blade rotation force into the housing.

In addition, the blade and the guide of the swirler fan is characterized in that it forms a vortex to form a straight or curved so as to introduce air containing the pollutant into the housing.

In addition, the angle between the guide and the blade of the swirler fan is characterized in that formed in an obtuse angle.

In addition, the bell mouse is a curved surface curved in the direction of the swirler fan and the inner edge is a curved surface in the direction of the suction fan so as to surround a portion of the swirler fan, the outer edge and the inner edge are the outer periphery and the inner edge, respectively It is characterized by forming a plurality of steps in the height direction and the thickness direction along the circumference.

In addition, the upper and lower ends of the suction fan are characterized by having a first auxiliary plate and a second auxiliary plate for dividing the inner space of the housing, respectively.

Next, a preferred embodiment of the vortex swirler exhaust device according to the present invention will be described in detail with reference to the drawings.

First, one embodiment of the vortex swirler exhaust device according to the present invention is the housing 10, the grill 20, the swirler fan 30, the bell mouse 34, the suction fan 40 as shown in FIG. The rotation shaft 50 includes a motor 60, a motor case 70, an exhaust pipe 80, a first auxiliary plate 90, and a second auxiliary plate 100.

The housing 10 is formed in a hollow shape as shown in Figs. The grill 20 is coupled to one end of the housing 10, and the exhaust pipe 80 is coupled to one side of the outer circumference. The housing 10 includes a swirler fan 30, a bell mouse 34, a suction fan 40, a rotating shaft 50, a motor 60, a motor case 70, a first auxiliary plate 90, and a second auxiliary plate. The plate 100 is accommodated therein.

One end of the housing 10 may be provided with an extension having an inner diameter larger than the other side, although not shown in the drawing. It is apparent that the expansion part may be coupled to the cover, and may be implemented to facilitate the installation of the vortex type fan by providing a coupling member instead of the cover. The expansion portion is formed to have a larger internal diameter than other portions of the housing 10, so that it is possible to efficiently absorb external pollutants and the like.

The grill 20 is coupled to one end of the housing 10. The grill 20 is formed in a radial vortex shape around a central hole, and the rotation direction of the vortex is preferably formed to be the same as the rotation direction of the step 39 in the thickness direction formed on the surface of the bell mouth 34. Do.

The grill 20 may be detachably attached to the housing 10 to facilitate cleaning.

An edge 7 is provided between the end of the grill 20 and the upper portion of the housing 10. The edge 7 is configured as an inclined surface such that the inner diameter increases gradually away from the grill 20. Through such inclined surface, it is preferable to allow a pollution source such as external air to be easily introduced into the housing.

In addition, although not shown, it is also possible to mount the LED lamp on the edge 7 at predetermined intervals along the circumference. The LED lamp is turned on only when the vortex ventilator is in operation, so it can be easily checked from the outside, and it is also possible to make the interior design stand out.

The swirler fan 30 is positioned between the grill 20 and the bell mouse 34 as shown in FIGS. 1 and 3, and rotates about the rotation axis 50 to generate vortices. Swallower fan 30 is mounted to the rotating shaft 50 to rotate in a counterclockwise direction and a plurality of rotating plate 31 having a disc shape, and a plurality of wings along the outer circumferential surface of the rotating plate 31 is fixed in an upright state (32) It includes. The swirler fan 30 is formed to partially protrude from the housing 10.

The blade 32 is preferably fixed to the outer circumferential surface of the rotary plate 31 in a state standing upright on the rotary plate 31. Swallower fan 30 rotates in the counterclockwise direction during operation and vortices are generated by the vanes 32 and the rotating plate 31, and the circumference of the swirler fan 30 is formed by the air pressure direction and the air pressure difference due to the vortex formation. Accordingly, air including an external pollution source is introduced into the housing 10 between the swirler fan 30 and between the wings 32 and the wings 32. The blade 32 is preferably formed higher than the height of the rotating plate (31).

When the rotating plate 31 of the swirler fan 30 is operated in a disc shape in which the central part is blocked, the pollutant introduced into the center by the high-speed rotation of the swirler fan 30 is dragged to the edge of the blade 32 and then to the blade 32. The contaminant is efficiently introduced into the housing 10 by hitting.

The shape of the blade 32 of the swirler fan 30 can be fixed to the outer circumferential surface of the rotating plate 31 in a straight or curved form as shown in the figure, and can be formed in various forms such as a turbo type. In addition, it is also possible to form the center portion of the rotating plate 31 in a perforated shape.

As another embodiment of the swirler fan 30 is shown in Figures 4 and 5, the blade 32 can be formed in a straight line and curved form and the guide 33 on the outer wall of the blade 32 Is formed. The guide 33 hits the wing 32 so that some dispersed contaminant is introduced into the housing 10 without being re-extracted.

The guide 33 is preferably secured a passage so as to be connected to the inside of the housing 10, and the height of the guide should be adjusted by adjusting the height of the guide 33, but also to prevent shedding, so the height of the guide is wing height It is most preferable to form a quarter line at. Guide 33 is preferable to keep an eye on the height of the guide 33 because the wind discharged from the wing 32 is spread on the plate. It is also possible to form a circular groove in the plate.

As shown in FIG. 6, the swirler fan 30 is formed at an obtuse angle (90 ° to 180 °) between the guide 33 and the blade 32 to suck a large amount of pollutant into the housing 10. It is also possible.

According to another embodiment of the swirler fan 30, as shown in FIG. 7, when the size of the swirler fan 30 is large, the guide 33 is formed large so that the wing 32 is formed on one side wall of the guide 33. It is also possible to fix and form. It is possible to more efficiently remove the pollutant in the surrounding environment by controlling the wind including the pollutant scattered around the swirler fan 30.

The bell mouse 34 is provided between the swirler fan 30 and the suction fan 40 as shown in FIGS. 2 and 8.

The bell mouth 34 has a curved surface curved in the direction of the swirler fan 30 and the outer edge 36 is curved in the direction of the suction fan 40 so as to surround a portion of the swirler fan 30. . Of the pollutants introduced by the rotation of the swirler fan 30, the pollutants introduced in the direction of the outer edge 36 move on the curved surface of the outer edge 36 to the inner edge 37 and flow in the curved surface. In addition, the contaminant and the like introduced in the plane direction of the center and the contaminant, etc. introduced in the direction of the inner edge 37 flows on the curved surface of the inner edge 37.

This shape of the bell mouth 34 increases the flow rate while reducing the flow rate of the pollutant or the like introduced through the swirler fan 30, so that the pollutant or the like is quickly discharged toward the exhaust pipe (80).

The outer edge 36 and the inner edge 37 of the bell mouth 34 form a plurality of steps 38 in the height direction along the outer periphery and the inner periphery, respectively. In addition, the outer edge 36 and the inner edge 37 of the bell mouse 34 form a plurality of steps 39 in the thickness direction along the outer circumference and the inner circumference, respectively.

The step 38 in the height direction and the step 39 in the thickness direction facilitate the formation of the vortex by forming a height difference between adjacent curved surfaces.

The suction fan 40 is provided between the bell mouse 34 and the motor 60, and is mounted on the rotation shaft 50 to rotate in the same direction with the swirler fan 30. That is, in the present invention, the swirler fan 30 and the suction fan 40 are mounted together on one rotation shaft 50.

The suction fan 40 is composed of a plurality of individual wing combinations twisted at a predetermined angle with respect to the radial direction. The suction fan 40 quickly delivers a source of contamination such as external air introduced through the swirler fan 30 and the bell mouth 34 toward the exhaust port 80.

It is preferable that the exhaust port 80 is eccentrically spaced to the left with respect to the rotation shaft 50 which is the rotation center of the suction fan 40. That is, when looking at the exhaust port 80 from the front, the diameter connecting the upper end and the lower end of the exhaust port 80 is not located on the same line as the rotation shaft 50 and is deflected to the left by a predetermined distance from the rotation shaft 50. This is to more effectively discharge the pollutant such as external air delivered while the suction fan 40 rotates.

The motor 60 is provided inside the housing 10 to mount the rotation shaft 50. The motor 60 is fixed and accommodated by the motor case 70.

The first auxiliary plate 90 and the second auxiliary plate 100 respectively block the upper and lower portions of the housing 10 so that the source of contamination such as external air introduced into the suction fan 40 does not stay inside the housing 10. To be discharged to the exhaust port 80 quickly.

The first auxiliary plate 90 and the second auxiliary plate 100 are installed adjacent to the upper end and the lower end of the suction fan 40 so as to accumulate pollutants such as external air at the upper end and the lower end of the housing 10. By eliminating this, it is possible to prevent such accumulated air from being re-ejected in the intake direction.

The operating state of the vortex swirler exhaust device of the present invention will be described with reference to FIGS. 2 and 9. When the swirler fan 30 rotates counterclockwise by the driving of the motor 60, the vortices are formed by the vanes 32 and the rotating plate 31 of the swirler fan 30. By forming the flow direction, a lot of air is introduced into the housing, including an external pollution source. The pollutant introduced into the rotating plate 31 is blocked at the center thereof and dragged to the edge of the vane 32, and then hit the vane 32 of the high speed rotation so that the pollutant is efficiently introduced into the housing 10. Pollutant sources that do not flow into some of the housing 10 are dispersed into the housing 10 through the guide 33 formed on the outer wall of the wing 32. A coanda effect is observed in which the pollutant is sucked and moved quickly along the inner wall of the housing 10 and the bell mouth 34.

Contaminants, etc. introduced into the housing 10 go through the bell mouth 34 and the flow rate is increased while the flow rate is hardly reduced. In addition, the step 38 in the height direction and the step 39 in the thickness direction provided in the bell mouth 34 facilitate the formation of the vortex by forming the height difference between adjacent curved surfaces.

Pollutant sources having an increased flow rate through the bell mouse 34 are transmitted to the suction fan 40, and the suction fan 40 quickly discharges the transmitted pollutant sources and the like toward the exhaust port 80. At this time, the first auxiliary plate 90 and the second auxiliary plate 100 respectively block the upper and lower ends of the suction fan 40 so that the pollution source and the like do not accumulate in the housing 10.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes, and substitutions may be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. . The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto shall be construed as being included in the scope of the present invention.

According to the vortex-type swirler fan exhaust device according to the present invention, the swirler fan is composed of a disk-shaped rotating plate and a blade and generates a vortex by the rotation of a swirler fan provided with a guide on the wing outer wall to induce a pressure difference and an air flow direction. This allows air, including external pollutants, to flow into the housing quickly and efficiently, and the air, including introduced pollutants, moves quickly in the direction of the exhaust pipe by a suction fan that is mounted on the same axis as the fixed bell mouse and rotates. Since there is an effect of maximizing the exhaust efficiency, there is industrial applicability in the exhaust fan field.

Claims

A housing having an inner diameter having an inner diameter larger than the other side in an empty shape; and

A motor provided inside the housing; and

A rotating shaft mounted to the motor; and

A swirler fan including a disk-shaped rotating plate mounted to the rotating shaft and a plurality of vanes disposed along the outer circumferential surface of the rotating plate and fixed in an upright state;

A bell mouth surrounding the swirler pan at the bottom of the swirler pan; and

And a suction fan mounted on the rotary shaft and provided below the bell mouse, the suction fan comprising a plurality of individual wing combinations that are twisted at a predetermined angle with respect to the radial direction.
The method according to claim 1,

The swirler fan is a swirl type swirler exhaust device, characterized in that formed in the form protruding from the upper housing.
The method according to claim 1,

In the swirler fan, vortices are generated by the blades and the rotating plate during operation, and air containing external sources of pollutants around the swirler fan along the circumference of the swirler fan and between the blades and the blades is formed by the air pressure direction and the air flow direction by the vortex formation. Vortex swirler exhaust system, characterized in that flowing into the inside.
The method according to claim 1,

The swirler fan exhaust system comprising a guide height is formed on the outer wall of the wing height 1/4 of the blade so that the air containing the pollutant source is partially dispersed by the blade rotation force into the housing.
The method according to claim 4,

Vortex swirler exhaust device characterized in that the blade and the guide of the swirler fan is formed in a straight or curved form to form a vortex to introduce air containing the pollutant into the housing.
The method according to claim 4,

Vortex swirler exhaust device, characterized in that the angle between the guide and the blade of the swirler fan is formed at an obtuse angle.
The method according to claim 1,

The bell mouse is a curved surface curved in the direction of the swirler fan and the inner edge is a curved surface in the direction of the suction fan so as to surround a portion of the swirler fan, the outer edge and the inner edge are the outer and inner circumference respectively Swirl type swirler exhaust device characterized in that it forms a plurality of steps in the height direction and the thickness direction along.
The method according to claim 1,

And a first auxiliary plate and a second auxiliary plate each of which divides the inner space of the housing at upper and lower ends of the suction fan, respectively.