KR101709278B1 - Local ventilator - Google Patents

Abstract

The disclosed local exhaust system includes a driving unit, a sweller that is disposed near the suction end of the exhaust pipe and generates a vortex that forms an air curtain around the exhaust flow toward the exhaust pipe by being rotated by the driving unit, An outer guide member which is arranged so as to guide the vortex generated by the swirler downward and a vortex flow passage which is disposed inside the outer guide member and which is formed by the swirler between the outer guide member And an outer guide member having a shape bent toward the inner guide member from the outer guide member to control a vortex passing through the vortex flow passage so that some of the vortex flows inward And a plurality of vortex control plates for inhibiting the vortex control member from being directed toward the vortex control plate.

Description

(Local ventilator)

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a local exhaust system for sucking contaminated air and discharging the polluted air to the outside, and more particularly, to a local exhaust system capable of improving exhaust efficiency by stabilizing exhaust flow toward an exhaust pipe.

In general, the local exhaust system is installed in a factory where a lot of pollutants are generated, a kitchen of a home and a restaurant, and is widely used for sucking contaminated air and discharging it to the outside.

Conventional local exhaust systems used for this purpose are installed in an exhaust pipe. As the distance between the pollution source and the exhaust pipe increases, the exhaust efficiency for sucking and discharging the polluted air is drastically lowered. In addition, there is a problem that the exhaust efficiency of the local exhaust system is lowered even when the pollution source is located in a wide open space. Therefore, in order to improve the exhaust efficiency, it is preferable to dispose the local exhaust device as close as possible to the contamination source and block the contamination source from the surrounding space.

However, when it is difficult to install the exhaust pipe near the contamination source by other fixtures, when a certain working space is required between the contamination source and the exhaust pipe, and when it is difficult to block the contamination source from the surrounding space, It is often difficult.

In order to overcome the problems of the conventional local exhaust system, local exhaust systems have been developed to expand the exhaust area and improve the exhaust efficiency by using a swirler that forms a vortex, and Korean Patent No. 10-0529002 , 10-0821295, 10-0873521 and 10-0873522 disclose examples of local exhaust using swirlers.

These local exhaust devices are generally equipped with a swirler which is installed on the suction port side of the exhaust pipe to form a vortex. The airflow created by the rotation of the sweller creates a vortex around the exhaust stream of contaminated air rising along the swirl center axis of rotation towards the inlet of the exhaust pipe, Serves as an air curtain that blocks the surrounding air from the surrounding area, thereby allowing the contaminated air to be sucked into the exhaust pipe more efficiently.

However, in the conventional local exhaust system, the vortex formed by the swirler is spread in the horizontal direction by the centrifugal force due to the rotation of the swirler, and the air curtain is formed in the form of an umbrella-like spread around the exhaust flow . Therefore, although the conventional local exhaust system has the effect of expanding the exhaust region horizontally, the effect of expanding the exhaust region in the vertical direction is insufficient.

Accordingly, the present applicant has conducted various studies for expanding the air curtain in the vertical direction so that the contaminated air far from the exhaust pipe can be efficiently sucked and exhausted.

However, when the vertical direction is imparted to the vortex in various ways, the air curtain formed by the vortex extends in the vertical direction to narrow the passage of the exhaust flow. As the vortex rotates and descends downward, it is spread outward by centrifugal force, but due to various factors, some of the vortexes are directed inward, i.e. towards the exhaust stream.

As described above, when some of the air in the vortex flows inward in a state in which the passage of the exhaust flow is narrowed, some of the air is mixed with the exhaust flow rising toward the exhaust pipe to interfere with the exhaust flow. There is a problem that the exhaust flow is blocked or the exhaust flow becomes unstable and the exhaust efficiency is lowered.

Patent Document 1: Korean Patent No. 10-0529002 (Registered on November 09, 2005) Patent Document 2: Korean Patent No. 10-0821295 (registered on Apr. 03, 2008) Patent Document 3: Korean Patent No. 10-0873521 (Registered on December 04, 2008) Patent Document 4: Korean Patent No. 10-0873522 (Registered on December 04, 2008)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vortex generating apparatus and a vortex generating apparatus which are provided with a vortex control plate for suppressing the inward airflow of some vortices at the lower end of an outer guide member surrounding a swirl generating vortex, Which is capable of improving the exhaust efficiency by stabilizing the exhaust flow toward the internal combustion engine.

According to an aspect of the present invention, there is provided a local exhaust system comprising:

A driving unit;

A sweller which is disposed near the suction end of the exhaust pipe and generates a vortex that forms an air curtain around the exhaust flow toward the exhaust pipe by being rotated by the driving unit;

An outer guide member disposed to surround the outer periphery of the swirler and guiding downward the vortex generated by the swirler;

An inner guide member disposed on the inner side of the outer guide member and defining a vortex flow passage through which the vortex generated by the swirler passes between the inner guide member and the outer guide member; And

Wherein the vortex flow control valve has a shape bent toward the inner guide member from the outer guide member to control a vortex passing through the vortex flow passage so that some of the vortex flows inward And a plurality of vortex control plates for suppressing the vortex.

The outer guide member is a cylindrical member spaced apart from the outer edge of the sweller, and the upper end of the outer guide member is fixed to the support plate. The inner guide member may be a cylindrical member having a diameter smaller than the diameter of the outer guide member and may be disposed below the sweller and spaced apart from the swirler and fixed to the outer guide member.

Further, a plurality of connecting members extending in the radial direction and spaced circumferentially are provided between the inner guide member and the outer guide member, and the inner guide member is fixed to the outer guide member through the plurality of connecting members .

In addition, at least one air inflow hole may be formed in the support plate to allow air to flow into the swirler.

The height of the inner guide member may be greater than the gap between the inner guide member and the outer guide member so that the vortex flow passage has a height in the vertical direction with respect to the width in the radial direction.

The lower end of the inner guide member may extend to a lower position than the lower end of the outer guide member.

The plurality of vortex control plates may be installed such that the lower end of the vortex control plate is positioned at a height higher than or equal to a lower end of the inner guide member.

The plurality of vortex control plates are fixedly provided at a lower end portion of the outer guide member at regular intervals along a circumferential direction at a predetermined distance from the lower end of the outer guide member toward the inner guide member by 30 to 90 It may have a bent plate shape.

The sum of the circumferential widths of the plurality of vortex control plates may be 20% to 40% of the circumferential length of the outer guide member.

Further, the outer guide member and the inner guide member may have a stepped shape so as to gradually increase in diameter while going downward.

The swirler includes a rotating plate member connected to the driving unit and rotatably connected to the exhaust pipe and having an exhaust suction hole communicating with the exhaust pipe at a central region thereof, And may include a plurality of blades that generate a flow.

The plurality of blades extend from the upper surface of the rotating plate member to an outer peripheral surface of the first guide member, and the plurality of blades extend from the upper surface of the rotating plate member to the outer peripheral surface of the first guide member. And a cylindrical second guide member surrounding the plurality of blades and forming an air flow passage between the first guide member and the first guide member may be attached to the outer end portion.

The height of the first guide member and the second guide member is larger than the distance between the first guide member and the second guide member so that the height of the air flow passage in the vertical direction is higher than the width in the radial direction .

The sweller may further include a third guide member covering an upper portion of the plurality of blades.

The rotating plate member may be provided with a cylindrical first exhaust passage forming member which surrounds the exhaust suction hole and forms an exhaust passage communicating with the exhaust pipe.

In addition, an annular fixing plate member having a hollow in the central region is disposed at an inner side of the inner guide member at an interval from the swirler below the swirler, and the fixing plate member is installed to surround the hollow, A second exhaust passage forming member having a cylindrical shape and forming an exhaust passage communicating with the exhaust pipe may be provided.

The local exhaust device is installed horizontally on the inner surface of the side wall surrounding the space where the polluted air is generated. The exhaust pipe is inserted into the ventilation hole with a diameter smaller than the diameter of the ventilation hole,

The swirler of the local exhaust apparatus generates vortex using external air introduced through the gap between the exhaust pipe and the ventilation hole and supplies the vortex to the inside of the space, and the contaminated air in the space is discharged to the outside through the exhaust pipe .

According to the local exhaust system according to the embodiments of the present invention, a part of the vortex passing through the vortex flow passage between the inner guide member and the outer guide member is inwardly moved inward by a plurality of vortex control plates provided on the outer guide member, It is possible to suppress the flow toward the flow. Accordingly, there is an advantage that the exhaust flow toward the exhaust pipe can be stabilized and the exhaust efficiency is improved.

1 is a cross-sectional view illustrating a local exhaust system according to an embodiment of the present invention.
FIG. 2 is a perspective view of the sweller shown in FIG. 1 from above. FIG.
3 is a perspective view of the outer guide member, the inner guide member, and the vortex control plate shown in Fig. 1, viewed from above.
4 is a partial cross-sectional view showing a modified example of the sweller shown in Fig.
5 and 6 are a partial sectional view and a perspective view showing a modified example of the outer guide member and the inner guide member shown in FIG.
FIG. 7 is a cross-sectional view showing an example in which the local exhaust device shown in FIG. 1 is installed in a horizontal direction and is used as a ventilator.
FIG. 8 is a photograph showing an exhaust flow in the local exhaust system according to the embodiment shown in FIGS. 5 and 6. FIG.

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

FIG. 2 is a perspective view of the sweller shown in FIG. 1, and FIG. 3 is a side view of the outer guide member shown in FIG. 1, Member and a vortex control plate as viewed from above.

1 to 3, a local exhaust apparatus 100 according to an embodiment of the present invention includes a driving unit 110 and a vortex generator 110 which is disposed near the suction end of the exhaust pipe 10 and rotates to generate vortex Fs An outer guide member 140 disposed to surround the outer periphery of the swirler 120 and guiding downward the vortex Fs generated by the swirler 120, An inner guide member 150 (which is disposed inside the outer guide member 140) and forms a vortex flow passage Ps through which the vortex Fs generated by the sweller 120 is passed between the outer guide member 140 and the outer guide member 140 And a plurality of vortex control plates 170 arranged in the outer guide member 140 for controlling vortexes Fs passing through the vortex flow passage Ps to suppress some of the vortexes Fs from being directed inward ).

Specifically, the exhaust pipe 10 is a pipe for sucking contaminated air through a suction end opened at a lower end thereof and discharging the polluted air to the outside, and may be formed of various kinds of pipes such as a flexible pipe or a metal pipe generally known. The contaminated air can be sucked into the exhaust pipe 10 by natural negative pressure and is sucked into the exhaust pipe 10 by an exhaust fan such as a sirocco fan 20 installed in the exhaust pipe 10. [ It may be forced inhalation.

The driving unit 110 is connected to the swirler 120 to provide power for rotating the swirler 120. The driving unit 110 may include a driving motor 111 disposed on the center axis of the exhaust pipe 10 and a rotating shaft 112 connected to the driving motor 111. The rotating shaft 112 is coupled to a rotating shaft coupling part 127 provided at a rotating center part of the rotating plate member 121 of the swirler 120 as described later. As described above, when the sirocco fan 20 is installed in the exhaust pipe 10, the driving unit 110 may rotate the sirocco fan 20 together with the sweller 120.

However, the driving unit 110 having the above-described configuration is illustrative and may have various configurations capable of providing power for rotating the sweller 120, and the mounting position is not limited to the above. For example, the driving unit 110 may be installed inside or outside the exhaust pipe 10 by a means such as a bracket, and may rotate the swirler 120 through a power transmitting means such as a belt or a gear.

The swirler 120 is disposed near the suction end of the exhaust pipe 10 and generates a vortex Fs that forms an air curtain around the exhaust flow Fe rising toward the exhaust pipe 10 by rotating And includes a rotating plate member 121 rotatably installed near the suction end of the exhaust pipe 10 and a plurality of blades 124 provided on the rotating plate member 121.

The rotating plate member 121 may be formed in a disc shape having a diameter larger than the diameter of the exhaust pipe 10. The rotating plate member 121 is installed near the suction end of the exhaust pipe 10 such that the rotational center axis coincides with the central axis of the exhaust pipe 10. [ An exhaust air suction hole 122 communicating with the exhaust pipe 10 is formed in the central region of the rotating plate member 121. The contaminated air in the exhaust area passes through the exhaust air suction hole 122 and sucked into the exhaust pipe 10 do.

The rotating plate member 121 is connected to the driving unit 110 and rotated. The rotation shaft member 121 is provided with a protruding boss-shaped rotation shaft coupling unit 127 and the rotation shaft 112 of the driving motor 111 is coupled to the rotation shaft coupling unit 127 . Specifically, a rotation shaft insertion hole 128 is vertically formed at the center of the rotation shaft engagement portion 127, and the rotation shaft 112 of the drive motor 111 is inserted into the rotation shaft insertion hole 128, And is tightly coupled by a screw 129. The exhaust sucking hole 122 is formed around the rotating shaft engaging part 127. The rotating shaft engaging part 127 is formed by a plurality of connecting parts 126 radially crossing the exhaust sucking hole 122, (Not shown).

The rotary plate member 121 is provided with a cylindrical first exhaust passage forming member 123 which surrounds the exhaust suction hole 122 and forms an exhaust passage Pe communicating with the exhaust pipe 10 May be provided. The first 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, respectively. The lower end of the exhaust pipe 10 may extend to the upper surface of the rotating plate member 121. In this case, the first exhaust path forming member 123 is not required on the upper surface of the rotating plate member 121 .

The plurality of blades 124 rotate together with the rotating plate member 121 to generate an air flow Fa. As will be described below, the air flow Fa generated by the plurality of vanes 124 forms a downwardly directed vortex Fs that rotates, and this vortex Fs is directed to the exhaust stream < RTI ID = 0.0 > And serves as an air curtain surrounding the iron (Fe).

The vanes 124 may be fixed to the upper surface of the rotating plate member 121 and radially disposed at predetermined intervals along the circumference of the exhaust suction hole 122. Each of the plurality of blades 124 may have a shape rising from the upper surface of the rotating plate member 121 and extending in the radial direction.

A first guide member 131 extending vertically downward may be installed on the outer edge of the rotating plate member 121. The plurality of blades 124 may extend from the top surface of the rotating plate member 121 to the outer circumferential surface of the first guide member 131 so that each of the plurality of blades 124 is formed of a " Or the like. The first guide member 131 may be formed in a cylindrical shape having a predetermined outer diameter, and the outer diameter of the first guide member 131 may be the same as the outer diameter of the rotating plate member 121. The first guide member 131 is fixed to the rotation plate member 121 so as to rotate together with the rotation plate member 121. For example, the upper end of the first guide member 131 may be fixed to the bottom of the outer edge of the rotating plate member 121.

In addition, a second guide member 132 surrounding the plurality of blades 124 may be attached to an outer end of the plurality of blades 124. 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. Specifically, the inner diameter of the second guide member 132 is formed to be larger than the outer diameter of the first guide member 131 by a width of the vanes 124 in the radial direction. That is, the plurality of vanes 124 are fixedly installed between the first guide member 131 and the second guide member 132, so that the rotation plate member 121, the first guide member 131, The blade 124 and the second guide member 132 rotate together.

The vertical air flow path Pa is formed between the first guide member 131 and the second guide member 132 and the plurality of vanes 124 are formed in the first The swirling flow Fs is generated between the guide member 131 and the second guide member 132 and rotates the air introduced into the air flow path Pa to generate the vortex Fs. 10) of the exhaust flow (Fe).

The vertical height of the first guide member 131 and the second guide member 132 is set to be greater than the vertical height of the first guide member 131 and the second guide member 132 in order to form the air- Is larger than the distance between the first guide member 131 and the second guide member 132. [ It is preferable that the vertical height of the second guide member 132 is higher than the vertical height of the first guide member 131. Accordingly, the upper end of the second guide member 132 extends to a position higher than the upper surface of the rotating plate member 121.

As described above, in the swirler 120 of the local exhaust system 100 according to the embodiment of the present invention, the radial width of the swirler 120 is narrowed by the first guide member 131 and the second side guide member 132 The air flow passage Pa having a high height in the vertical direction is formed, so that the vortex Fs passing through the air flow passage Pa can be further advanced in the vertical direction, i.e., in the axial direction.

The swirler 120 may further include a third guide member 133 covering an upper portion of the plurality of blades 124. The third guide member 133 may include a plurality of blades 124, To prevent upward flow of the vortex (Fs) The third guide member 133 has an inner diameter larger than the outer diameter of the exhaust pipe 10 and smaller than the outer diameter of the first guide member 131 and an outer edge portion of the annular shape fixed to the upper end of the second guide member 132 As shown in FIG. A predetermined gap is formed between the outer circumferential surface of the exhaust pipe 10 and the inner circumferential surface of the third guide member 133. Air around the exhaust pipe 10 can be introduced into the plurality of vanes 124 through the gap have.

On the other hand, the configuration of the sweller 120 shown in Figs. 1 and 2 is merely an example. That is, the sweller 120 may have various shapes, and other examples of the sweller 120 will be described with reference to FIG.

The outer guide member 140 has a shape extending in the vertical direction by a predetermined height while surrounding the outer periphery of the sweller 120. The outer guide member 140 is disposed at a predetermined distance from the outer edge of the swirler 120, specifically, the outer peripheral surface of the second guide member 132, and the upper end of the outer guide member 140 is positioned above the swirler 120 And can be fixed to the horizontally installed support plate 160. Therefore, even if the swirler 120 rotates, the outer guide member 140 does not rotate.

The swirler 120 is spaced apart from the bottom surface of the support plate 160 by a predetermined distance so that rotation of the swirler 120 is not disturbed by the support plate 160. The support plate 160 may be fixed to the inside of the range hood, Respectively. At least one, preferably a plurality of air inflow holes 162 may be formed in the support plate 160 to allow air to flow smoothly toward the sweller 120.

The outer guide member 140 may be formed in a cylindrical shape having a predetermined diameter. The height of the outer guide member 140 can be properly determined in consideration of the distance between the sweller 120 and the contamination source, the diameter of the sweller 120, and the like, for example, within a range of about 100 mm to 400 mm.

The outer guide member 140 having the above-described configuration guides the vortex Fs generated by the plurality of vanes 124 of the swirler 120 downward to thereby guide the air curtain Fs formed by the vortex Fs, In the vertical direction, that is, in the axial direction, which will be described later.

The inner guide member 150 is disposed inside the outer guide member 140. The inner guide member 150 is installed to be fixed to the outer guide member 140. The inner guide member 150 is disposed between the inner guide member 150 and the outer guide member 140 in a radial direction A plurality of connecting members 155 may be installed. The inner guide member 150 is disposed below the swirler 120 and 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 150 is formed in a cylindrical shape having a diameter smaller than the diameter of the outer guide member 140 so that the inner guide member 150 and the outer guide member 140 are provided with the sweller 120 The vortex flow passage Ps in the vertical direction through which the vortex Fs generated by the vortex flow passage Ps passes is formed.

 It is preferable that the vortex flow passage Ps has a shape with a narrow radial width and a relatively high height in the vertical direction in order to further improve the vertical directivity of the vortex Fs. For this, the vertical height of the inner guide member 150 is preferably larger than the gap between the inner guide member 150 and the outer guide member 140.

The lower end of the inner guide member 150 may extend to a lower position than the lower end of the outer guide member 140. The inner guide member 150 not only forms the vortex flow passage Pa as described above but also allows some of the vortex Fs passing through the vortex flow passage Pa to flow inwardly, To prevent the water from flowing to the outside.

An annular fixing plate member 151 may be provided on the inner side of the inner guide member 150. The fixing plate member 151 may be horizontally disposed below the rotating plate member 121 of the swirler 120 at a predetermined interval from the rotating plate member 121.

The fixing plate member 151 is fixed to the inner guide member 150. Specifically, the outer edge portion of the fixing plate member 151 may be fixed to the inner guide member 150. Therefore, the fixing plate member 151 does not rotate like the inner guide member 150.

A hollow 152 communicating with the exhaust suction hole 122 formed in the rotary plate member 121 is formed in the central region of the fixing plate member 151. The contaminated air in the exhaust region is discharged through the hollow 152 and the exhaust Passes through the suction hole (122) and is sucked into the exhaust pipe (10). The fixing plate member 151 is provided with a cylindrical second exhaust passage forming member 153 which surrounds the hollow 152 and forms an exhaust passage Pe communicating with the exhaust pipe 10 . The second exhaust passage forming member 153 may be provided on the upper surface and the lower surface of the fixing plate member 151 and may have an inner diameter larger than the outer diameter of the first exhaust passage forming member 123.

The fixed plate member 151 and the second exhaust passage forming member 153 are formed so that a part of the vortex Fs generated by the swirler 120 is blown between the swirler 120 and the inner guide member 150 And also blocks the exhaust gas from flowing out toward the exhaust flow (Fe).

The plurality of vortex control plates 170 are disposed at regular intervals along the circumferential direction of the outer guide member 140. The vortex control plate 170 may be fixed to the lower end of the outer guide member 140 by using suitable fixing means such as a fixing screw 172. Meanwhile, the plurality of vortex control plates 170 may be fixed to the lower end of the outer guide member 140 by welding. The vortex control plate 170 may be integrally formed with the outer guide member 140.

The vortex control plate 170 has a plate shape bent at a predetermined angle? From the lower end of the outer guide member 140 to the inner guide member 150 side. The plurality of vortex control plates 170 are installed such that the lower ends of the vortex control plates 170 are positioned at the same height as the lower ends of the inner guide members 150.

The plurality of vortex control plates 170 having the above-described configuration controls the vortex Fs passing through the vortex flow passage Ps between the inner guide member 150 and the outer guide member 140, (Fe) toward the inside of the exhaust pipe 10, so that the exhaust flow (Fe) rising toward the exhaust pipe 10 can be stably formed. This will be described in detail later.

Specifically, as a result of a lot of tests, it was found that the exhaust flow (Fe) was stable when the bent angle θ of the vortex control plate 170 was 30 ° to 90 °, , The exhaust flow (Fe) was formed most stably.

When six to ten vortex control plates 170 are installed at regular intervals in the circumferential direction of the outer guide member 140, a favorable result that the exhaust flow (Fe) is stabilized can be obtained, The exhaust flow (Fe) was formed most stable when 8 were installed.

When the total sum of the circumferential widths W of the vortex control plates 170 is 20% to 40% of the circumferential length of the outer guide member 140, And the exhaust flow (Fe) was most stable when the temperature was 30% ~ 35%.

For example, eight vortex control plates 170 are provided on the outer guide member 140 having a diameter of 300 mm, and a value obtained by summing the circumferential widths W of each of the vortex control plates 170 is referred to as an outer guide member The circumferential length of the outer guide member 140 is approximately 942 mm and the sum of the circumferential widths W of each of the eight vortex control plates 170 is approximately 311 mm So that the circumferential width W of each of the eight vortex control plates 170 is approximately 39 mm.

Hereinafter, variations of the swirler, the outer guide member and the inner guide member shown in Figs. 1 to 3 will be described with reference to Figs. 4 to 6. Fig.

4 is a partial cross-sectional view showing a modified example of the sweller shown in Fig.

4, a plurality of blades 124 'installed on the rotary plate member 121 of the swirler 120 may have a shape extending from the upper surface of the rotary plate member 121 to the outer peripheral surface of the first guide member 131, Lt; / RTI > The upper end of each of the plurality of blades 124 'may be formed to be inclined so as to be gradually decreased from the rotation center. The third guide member 133 'that covers the upper portion of the plurality of blades 124' also has a sloping shape that is inclined downwardly toward the outer circumference, that is, have.

The distance between the rotation plate member 121 and the third guide member 133 becomes gradually narrower as the distance from the rotation center becomes larger. Therefore, the air flow formed by the plurality of blades 124 ' Fa gradually increase toward the outer ends of the plurality of vanes 124 ', and thus a stronger vortex Fs can be formed.

5 and 6 are a partial sectional view and a perspective view showing a modified example of the outer guide member and the inner guide member shown in FIG.

Referring to FIGS. 5 and 6, the outer guide member 140 'installed to surround the outer periphery of the sweller 120 may have a stepped shape gradually increasing in diameter with the downward direction. Also, the inner guide member 150 'provided inside the outer guide member 140' may have a stepped shape such that the diameter gradually increases downward as the outer guide member 140 '.

As described above, when the outer guide member 140 'and the inner guide member 150' have a stepped shape, the vortex flow formed between the outer guide member 140 'and the inner guide member 150' The diameter of the passage Ps becomes larger, and the diameter of the vortex Fs exiting the lower end of the vortex flow passage Ps becomes larger. Accordingly, since the diameter of the air curtain formed by the vortex Fs is increased, there is an advantage that the exhaust area surrounded by the air curtain can be widened.

Hereinafter, the operation of the local exhaust system 100 according to the present invention having the above-described configuration, the formation of the vortex and the exhaust flow thereof will be described.

Referring to FIG. 1, when the swirler 120 is rotated by the driving unit 110, the swirler 120 is rotated from the periphery of the exhaust pipe 10 through a plurality of air inflow holes 162 formed in the support plate 160, And the air thus introduced forms the air flow Fa by the plurality of vanes 124 of the sweller 120. [ The air flow Fa forms a vortex Fs that rotates along the direction of rotation of the sweller 120. This vortex Fs is surrounded by the air curtain Fs that surrounds the exhaust area to separate the exhaust area from its surrounding area. . Then, when the exhaust operation is performed through the exhaust pipe 10, the exhaust flow Fe is formed while the contaminated air in the exhaust region rises toward the exhaust pipe 10.

Although the vortex Fs forming the air curtain is shown as simply flowing downward in FIG. 1, the vortex flow in the direction of rotation of the swirler 120, for example, To the exhaust area while rotating in the counterclockwise direction.

The vortex Fs formed by the vanes 124 passes through the air flow passage Pa formed between the first guide member 131 and the second side guide member 132 of the sweller 120 , The air flow path Pa is formed in a shape having a narrower radial width and a higher vertical height. Accordingly, the vortex Fs passing through the air flow passage Pa can proceed further in the vertical direction, that is, in the axial direction, so that the air curtain formed by the vortex Fs can also be extended .

The vortex Fs is again guided in the vertical direction, that is, the axial direction, by the outer guide member 140 while exiting the lower end of the air flow passage Pa of the swirler 120. [ That is, the vortex Fs that has passed through the outlet of the air flow path Pa of the swirler 120 is blocked by the outer guide member 140 and can not spread widely, and the vortex Fs between the outer guide member 140 and the inner guide member 150 And is directed downward while rotating along the vortex flow passage Ps formed in the vortex flow passage Fs. Particularly, since the vortex flow passage Ps has a narrow radial width and a height in the vertical direction, the vertical directivity of the vortex Fs passing through the vortex flow passage Ps can be further improved . This means that the air curtain surrounding the exhaust area is formed longer in the vertical direction. Therefore, there is an advantage that the polluted air far from the exhaust pipe 10 can be more easily sucked and exhausted.

Further, if the air curtain is formed long in the vertical direction, the passage of the exhaust flow (Fe) surrounded by the air curtain becomes narrow, so that the exhaust flow Fe is also influenced by the rotating vortex Fs. Accordingly, since the exhaust flow Fe rises and rotates in the form of a spiral, it is advantageous in that it can be sucked and exhausted more smoothly into the exhaust pipe 10.

As described above, some of the vortices Fs are directed inward, that is, toward the exhaust flow Fe. In a state in which the passage of the exhaust flow Fe is narrow, some air directed inward of the vortex Fs flows in the exhaust flow (Fe), while lowering the exhaust efficiency.

However, in the present invention, a plurality of vortex control plates 170 provided on the outer guide member 140 are used to guide the vortex flow passing through the vortex flow passage Ps between the inner guide member 150 and the outer guide member 140 Fs) can be suppressed from being directed inward, that is, toward the exhaust flow (Fe).

The operation of the plurality of vortex control plates 170 is based on a result of a lot of tests, and the operation of the vortex control plate 170 is considered to result from the following combination of reasons.

First, since the distance between the inner guide member 150 and the vortex control plate 170 becomes gradually narrower downward, the speed of the vortex F becomes higher as the vortex Fs escapes through the narrowed passage. As a result, the directivity of the vortex Fs vertically downward is further improved near the lower end of the inner guide member 150, so that the phenomenon that some of the vortices Fs are directed inward can be suppressed.

Second, since the interval between the inner guide member 150 and the vortex control plate 170 becomes gradually narrower downward, the speed of the vortex F is increased as the vortex Fs escapes through the narrowed passage. Accordingly, the pressure near the lower end of the inner guide member 150 is lowered and balanced with the lower pressure of the exhaust flow (Fe) in the inner side, so that the phenomenon that some of the vortices Fs are directed inward can be suppressed will be.

Third, since a plurality of vortex control plates 170 are inclined toward the inner guide member 150, some vortexes Fs are reflected on the outer circumferential surface of the inner guide member 140 along the inclined surfaces of the vortex control plate 170 By being outwardly directed, the phenomenon that some of the vortices Fs are directed inward may be reduced or suppressed.

As described above, the plurality of vortex control plates 170 control the vortex Fs passing through the vortex flow passage Ps to suppress some of the vortex Fs from going inward, that is, toward the exhaust flow Fe Accordingly, the exhaust flow (Fe) rising toward the exhaust pipe (10) can be stabilized and the exhaust efficiency is improved.

The above-mentioned advantages can be clearly confirmed through the photograph of FIG.

FIG. 8 is a photograph showing an exhaust flow in the local exhaust system according to the embodiment shown in FIGS. 5 and 6. FIG.

8, when the local exhaust system 100 according to the present invention is installed far away from a pollution source, for example, even if it is separated by 100 cm or more, the exhaust flow Fe is rotated toward the local exhaust system 100 in a spiral shape And it can be seen that the exhaust flow Fe is not disturbed and is stably sucked into the exhaust pipe 10 even adjacent to the local exhaust device 100. [

In the meantime, although the local exhaust system 100 according to the present invention has been illustrated and described above as an example of a vertical exhaust system, the installation direction of the local exhaust system 100 according to the present invention is not limited. That is, the local exhaust system 100 according to the present invention may be installed in a horizontal direction or in an inclined direction.

FIG. 7 is a cross-sectional view showing an example in which the local exhaust device shown in FIG. 1 is installed in a horizontal direction and is used as a ventilator.

7, the local exhaust system 100 according to the present invention is installed in a horizontal direction to supply clean air to the inside of a contaminated space, Can play a role.

Specifically, the local exhaust system 100 may be installed horizontally on a wall surrounding the space where the contaminated air is generated, for example, on the inner surface of the side wall 30. The side wall (30) is formed with a ventilation hole (32) communicating with the outside. The support plate 160 of the local exhaust system 110 may be fixedly installed on the inner surface of the side wall 30 and the air inlet hole 162 formed in the support plate 160 may communicate with the ventilation hole 32.

The exhaust pipe 10 may be inserted into the ventilation opening 32 with a diameter smaller than the diameter of the ventilation opening 32 and the driving motor 111 of the driving portion 110 may be installed in the exhaust pipe 10. [ But is not limited thereto. The rotating shaft 112 of the driving unit 110 may be coupled to the rotating plate member 121 of the sweller 120 of the local exhaust system 100 while being inserted into the exhaust pipe 10. An exhaust fan such as a sirocco fan 20 may be installed in the exhaust pipe 10 and the sirocco fan 20 may be coupled to the rotating shaft 112 and rotated.

Clean fresh air can be introduced into the sweller 120 through the gap between the exhaust pipe 10 and the ventilation port 32. The clean fresh air thus introduced flows into the vortex Fs by the sweller 120, . The polluted air in the contaminated space forms an exhaust flow (Fe) and is discharged to the outside through the exhaust pipe (10). At this time, the vortex Fs serves not only as an air curtain surrounding the exhaust flow Fe, but also serves to supply clean air into the contaminated space.

The basic structure, operation, and effect of the local exhaust system 100 are the same as those of the structure, operation, and effect described above with reference to FIGS. 1 to 6, and a detailed description thereof will be omitted in order to avoid repetition.

In addition, the local exhaust device 100 may serve as a ventilator. In this case, the clean air outside can be supplied into the contaminated space, and the contaminated air inside the space can be discharged to the outside. Therefore, according to the local exhaust system 100 of the present invention, the inside of the contaminated space can be quickly ventilated with clean air.

Although the local exhaust device 100 according to the present invention is installed on the inner surface of the side wall 30 to serve as a ventilator, the present invention is not limited thereto. For example, the local exhaust system 100 according to the present invention may be installed in a vertical direction to a ceiling wall having ventilation holes in a wall surrounding the space where the polluted air is generated, and may serve as a ventilator.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the true scope of protection of the present invention should be determined by the appended claims.

100 ... local exhaust device 110 .. driving part
111 ... drive motor 112 ... rotation shaft
120 ... Sweller 121 ... Rotating plate member
122 ... exhaust suction hole 123 ... first exhaust passage forming member
124, 124 '... wing 126 ... connection
127 ... rotation shaft coupling portion 128 ... rotation shaft insertion hole
129 ... fixing screw 131 ... first guide member
132 ... second guide member 133, 133 '... third guide member
140, 140 '... outer guide member 150, 150' ... inner guide member
151 ... fixing plate member 152 ... hollow
153 ... second exhaust passage forming member 155 ... connecting member
160 ... support plate 162 ... air inflow hole
170 ... Vortex control panel 172 ... Set screw

Claims (17)

A driving unit;
A sweller which is disposed near the suction end of the exhaust pipe and generates a vortex that forms an air curtain around the exhaust flow toward the exhaust pipe by being rotated by the driving unit;
An outer guide member disposed to surround the outer periphery of the swirler and guiding downward the vortex generated by the swirler;
An inner guide member disposed on the inner side of the outer guide member and defining a vortex flow passage through which the vortex generated by the swirler passes between the inner guide member and the outer guide member; And
Wherein the vortex flow control valve has a shape bent toward the inner guide member from the outer guide member to control a vortex passing through the vortex flow passage so that some of the vortex flows inward A plurality of vortex control plates for restricting the vortex flow,
The swirler includes a rotating plate member that is connected to the driving unit and rotates and has an exhaust suction hole communicating with the exhaust pipe at a center region thereof and an air flow which is installed on the rotating plate member and rotates together with the rotating plate member, And a plurality of vanes for generating the vanes. The method according to claim 1,
A support plate is installed on the upper part of the swirler with an interval from the swirler,
Wherein the outer guide member is a cylindrical member spaced apart from an outer edge of the sweller, the upper end of the outer guide member being fixed to the support plate,
Wherein the inner guide member is a cylindrical member having a diameter smaller than the diameter of the outer guide member and is disposed below the sweller and spaced apart from the swirler and fixed to the outer guide member. Device. 3. The method of claim 2,
A plurality of connecting members extending in the radial direction and spaced apart in the circumferential direction are provided between the inner guide member and the outer guide member and the inner guide member is fixed to the outer guide member through the plurality of connecting members . 3. The method of claim 2,
Wherein at least one air inflow hole is formed in the support plate so as to allow air to flow toward the swirler. 5. The method according to any one of claims 1 to 4,
Wherein the height of the inner guide member is larger than the gap between the inner guide member and the outer guide member so that the vortex flow passage has a height in the vertical direction with respect to the width in the radial direction. 5. The method according to any one of claims 1 to 4,
And the lower end of the inner guide member extends to a lower position than the lower end of the outer guide member. The method according to claim 6,
Wherein the plurality of vortex control plates are installed such that a lower end of the vortex control plate is positioned higher than or equal to a lower end of the inner guide member. 5. The method according to any one of claims 1 to 4,
Wherein the plurality of vortex control plates are fixedly provided at a lower end portion of the outer guide member at a predetermined interval along the circumferential direction at intervals of 30 to 90 degrees from the lower end of the outer guide member toward the inner guide member, And a second exhaust gas outlet. 9. The method of claim 8,
Wherein a sum of the circumferential widths of the plurality of vortex control plates is 20% to 40% of a circumferential length of the outer guide member. The method according to claim 1,
Wherein the outer guide member and the inner guide member have a stepped shape so as to gradually increase in diameter while being directed downward. delete The method according to claim 1,
A plurality of blades extending from an upper surface of the rotating plate member to an outer peripheral surface of the first guide member, and an outer end of the plurality of blades, Wherein a cylindrical second guide member which surrounds the plurality of blades and forms an air flow passage between the first guide member and the first guide member is attached to the first guide member. 13. The method of claim 12,
The height of the first guide member and the height of the second guide member is larger than the gap between the first guide member and the second guide member so that the height of the air flow passage in the vertical direction is higher than the width in the radial direction . 13. The method of claim 12,
Wherein the sweller includes a third guide member covering an upper portion of the plurality of vanes. The method according to claim 1,
Wherein the rotating plate member is provided with a cylindrical first exhaust passage forming member which is provided so as to surround a periphery of the exhaust suction hole and forms an exhaust passage communicating with the exhaust pipe. The method according to claim 1,
An annular fixing plate member having a hollow in a central region is disposed at an inner side of the inner guide member with an interval from the sweller below the swirler,
Wherein the fixing plate member is provided with a cylindrical second exhaust passage forming member which surrounds the hollow and forms an exhaust passage communicating with the exhaust pipe. The method according to claim 1,
Wherein the exhaust pipe is inserted into the ventilation hole with a diameter smaller than a diameter of the ventilation hole formed through the side wall, the exhaust pipe being inserted into the ventilation hole,
The swirler of the local exhaust apparatus generates vortex using external air introduced through the gap between the exhaust pipe and the ventilation hole and supplies the vortex to the inside of the space, and the contaminated air in the space is discharged to the outside through the exhaust pipe Wherein the exhaust gas is exhausted from the internal combustion engine.

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