KR20170059240A

KR20170059240A - Local ventilator

Info

Publication number: KR20170059240A
Application number: KR1020150163339A
Authority: KR
Inventors: 김지하; 박용찬
Original assignee: 김지하
Priority date: 2015-11-20
Filing date: 2015-11-20
Publication date: 2017-05-30

Abstract

Disclosed is a local ventilation apparatus rotating a discharge flow in a vortex shape to increase discharge efficiency. According to the present invention, the apparatus comprises: a driving unit; a swirler disposed close to an inlet end part of a ventilation pipe to be rotated by the driving unit, to generate first and second swirls around a discharge flow towards the discharge pipe; a first swirl guide member disposed to surround the outer periphery of the swirler to guide the first swirl downward; and a second swirl guide member disposed inside the first swirl guide member to guide the second swirl downward. The swirler is connected to the driving unit to be rotated, and includes: a rotary plate member having a discharge hole communicating with the discharge pipe in a central region and having a vertically penetrated connection hole in the periphery of the discharge hole; multiple upper blades installed on the upper surface of the rotary plate member to generate a first airflow forming the first swirl; a barrier installed in an edge part of the upper surface of the rotary plate member at a height lower than that of the upper blades to retard the first airflow; and multiple lower blades installed on the bottom surface of the rotary plate member to generate a second airflow forming the second swirl.

Description

(Local ventilator)

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] 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 rotating an exhaust flow in a spiral shape.

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

The conventional local exhaust system used for this purpose is installed to be connected to the exhaust pipe. As the distance between the pollution source and the local exhaust system becomes larger, 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, in the case where it is difficult to install the local exhaust system near the contamination source due to the obstruction by another installation, a case where a constant working space is required between the source and the local exhaust system, and it is difficult to shut off the contamination source from the surrounding space, In many cases, it is difficult to satisfy the installation conditions.

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 , 10-0873521 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 generated by the rotation of the swirler forms a vortex around the exhaust stream rising toward the inlet of the exhaust pipe along the swirl center axis of rotation, So that the contaminated air can be more efficiently sucked into the exhaust pipe.

However, in the conventional local exhaust system, the vortex formed by the swirler spreads widely in the horizontal direction due to the centrifugal force due to the rotation of the swirler, so that an air curtain spreading in an umbrella shape around the exhaust flow is formed . 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 experiments and studies to expand the air curtain in the vertical direction so that contaminated air far from the local exhaust device can be efficiently sucked and exhausted.

Through various experiments and studies, Applicants have found that when a vortex formed by a swirler, that is, an air curtain, is extended in the vertical direction and the exhaust flow formed inside the vortex is raised while rotating in the form of a vortex, So that the exhaust efficiency is improved.

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

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the prior art, and it is an object of the present invention to improve exhaust efficiency by expanding a vortex formed by a swirler in a vertical direction and rotating an exhaust flow formed inside a vortex, The present invention has been made to solve the above problems.

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

A driving unit;

A sweller disposed near the suction end of the exhaust pipe and generating a first vortex and a second vortex around the exhaust flow toward the exhaust pipe by being rotated by the driving unit;

A first vortex guiding member disposed to surround the outer periphery of the swirler and guiding the first vortex downward; And

And a second vortex guiding member disposed inside the first vortex guiding member and guiding the second vortex downward,

In the sweller,

A rotating plate member connected to the driving unit and rotated to form an exhaust hole communicating with the exhaust pipe in a center region and having a connecting hole vertically passing around the exhaust hole;

A plurality of upper blades installed on an upper surface of the rotating plate member to generate a first air flow forming the first vortex;

A barrier disposed at an upper edge portion of the rotating plate member at a height lower than the height of the plurality of upper blades to retard the first air flow;

And a plurality of lower vanes provided on a bottom surface of the rotating plate member to generate a second air flow forming the second vortex.

A plurality of upper wings are disposed on the outer circumferential surface of the first upper wing guide member from the upper surface of the rotating plate member, As shown in FIG.

The upper ends of the plurality of upper wings may be provided with a cylindrical second upper wing guide member surrounding the plurality of upper wings. The upper ends of the plurality of upper wings may be provided with an annular plate And a gap may be formed between the upper end of the barrier and the bottom surface of the third upper wing guide member such that the first air flow may flow past the upper end of the barrier .

The height of the barrier may be 50% to 80% of the height of the plurality of upper blades.

Further, the plurality of lower vanes may be disposed on the bottom surface of the rotating plate member, and may be arranged radially with an interval along the outer circumference of the connecting hole.

In addition, a cylindrical first lower wing guide member extending vertically downward is fixedly installed between the exhaust hole and the connection hole on the bottom surface of the rotary plate member, and a plurality of lower wing guide members, And a third lower wing guide member surrounding the plurality of lower wings may be installed at an outer end of the plurality of lower wings.

The first swirl guide member is a cylindrical member spaced apart from the outer edge of the sweller, and the upper end of the swirl member is fixed to the support plate. And the second vortex guiding member is a cylindrical member having an inner diameter which is greater than or equal to the outer diameter of the plurality of lower vanes and is disposed to be spaced apart from the swirler under the sweller and fixed to the outer guide member .

Further, a plurality of first connecting members extending radially in the circumferential direction are provided between the second vortex guiding member and the second vortex guiding member, and the second vortex guiding member includes a plurality of first connecting members Member can be fixed to the first vortex guiding member.

In addition, a cylindrical inner guide member having a diameter smaller than the diameter of the second vortex guiding member is disposed inside the second vortex guiding member, and the inner guide member is installed to be fixed to the second vortex guiding member .

Further, a plurality of second connecting members extending radially in the circumferential direction are provided between the inner guide member and the second vortex guiding member, and the inner guide member is connected to the inner guide member through the plurality of second connecting members And can be fixed to the second vortex guiding member.

A cylindrical exhaust flow guide member for guiding the exhaust flow toward the exhaust hole is disposed inside the inner guide member. An annular connecting plate member is horizontally installed between the exhaust flow guide member and the inner guide member And the exhaust flow guide member can be fixed to the inner guide member through the connecting plate member.

The first vortex guiding member may further include a plurality of swash plates disposed on the lower end of the first vortex guiding member at intervals along the circumferential direction and having a shape bent obliquely toward the second vortex guiding member from the first vortex guiding member .

The lower end of the second vortex guiding member may extend to a position lower than the lower end of the first vortex guiding member and the lower end of the plurality of swash plates may be positioned at a height higher than or equal to the lower end of the second vortex guiding member Can be installed.

The plurality of swash plates are fixedly provided on the lower end of the first vortex guiding member at a predetermined interval along the circumferential direction at a predetermined interval from the lower end of the first vortex guiding member toward the second vortex guiding member It can have a 30 ° ~ 70 ° bent shape.

The sum of the circumferential widths of the plurality of swash plates may be 20% to 40% of the circumferential length of the first vortex guiding member.

In addition, the first vortex guiding member and the second vortex guiding member may have a stepped cylindrical shape such that the diameter of the lower portion is larger than the diameter of the upper portion.

In addition, a ring-shaped passage forming member having a diameter smaller than the diameter of the second vortex guiding member is provided inside the lower end portion of the second vortex guiding member, and the passage forming member is provided between the passage forming member and the second vortex guiding member. A plurality of vertical guide plates for vertically guiding a part of the vortex can be radially installed at intervals in the circumferential direction.

According to the local exhaust system of the present invention, the rotational force and the rotational speed of the first vortex are raised by the barrier formed on the upper edge portion of the rotating plate member, and the second vortex is also subjected to the rotational force and the rotational speed The exhaust flow formed inside the second vortex also rises toward the exhaust pipe due to the influence of the first vortex and the second vortex having a high rotational force and rotational speed and rotating in a spiral shape. As described above, when the exhaust flow rises while rotating in a spiral shape, the exhaust flow can be more smoothly and stably sucked into the exhaust pipe, thereby improving the exhaust efficiency.

In addition to the air curtains formed by the first vortex and the second vortex generated by the plurality of upper vanes and the plurality of lower vanes, the air curtains surrounding the exhaust region are formed to be double thick and firm, The air curtain can be further extended in the vertical direction by the vortex guiding member. Accordingly, the polluted air far from the exhaust pipe can be more easily and efficiently sucked and exhausted, thereby improving the exhaust efficiency.

Further, the first vortex and the second vortex are stabilized by the plurality of swash plates provided at the lower end portion of the first vortex guiding member, whereby the exhaust flow formed inside the first vortex and the second vortex is stabilized, thereby further improving the exhaust efficiency .

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.
Fig. 3 is a perspective view of the sweller shown in Fig. 1 as seen from below. Fig.
4 is a perspective view showing the first vortex guide member, the second vortex guide member, the inner guide member and the swash plate shown in Fig.
5 is a cross-sectional view illustrating local exhaust self-purifying according to another embodiment of the present invention.
6 is a perspective view showing the first vortex guide member, the second vortex guide member, the inner guide member and the swash plate shown in Fig. 5;

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.

1 is a perspective view of the sweller shown in FIG. 1, and FIG. 3 is a cross-sectional view of the sweller shown in FIG. 1 viewed from below. FIG. 4 is a perspective view showing the first vortex guiding member, the second vortex guiding member, the inner guiding member and the swash plate shown in Fig. 1; Fig.

1 to 4, a local exhaust apparatus 100 according to an embodiment of the present invention includes a driving unit 110 and a exhaust pipe 10 disposed near the suction end of the exhaust pipe 10 to rotate the exhaust pipe 10 A swirler 120 for generating a first vortex Fs1 and a second vortex Fs2 around the exhaust flow Fe directed toward the first vortex 120 and a second vortex Fs2 arranged to surround the outer periphery of the swirler 120, A first vortex guiding member 141 for guiding the second vortex Fs1 downward and a second vortex guiding member 142 disposed on the inside of the first vortex guiding member 141 to guide the second vortex Fs2 downward 142).

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 includes a first vortex Fs1 disposed near the suction end of the exhaust pipe 10 and forming a double air curtain around the exhaust flow Fe rising toward the exhaust pipe 10 by rotation, A plurality of upper wings 131, a barrier 135 and a plurality of lower wings 136. The first wings 131 and the second wings 131 generate a second vortex Fs2.

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 may be 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 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 region passes through the exhaust hole 122 and is sucked into the exhaust pipe 10.

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 hole 122 is formed around the rotation shaft coupling part 127. The rotation shaft coupling part 127 is formed by a plurality of connection parts 126 radially crossing the exhaust hole 122, As shown in Fig.

The rotating plate member 121 is provided with a cylindrical exhaust gas forming member 123 which surrounds the exhaust hole 122 and forms an exhaust passage Pe communicating with the exhaust pipe 10 . The exhaust pipe 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 surface of the rotating plate member 121. Meanwhile, the lower end of the exhaust pipe 10 may extend near the upper surface of the rotating plate member 121, and in this case, the exhaust path forming member 123 may not be required.

A connection hole 124 is formed in the rotation plate member 121 so as to extend vertically around the exhaust hole 122. The connection hole 124 allows the upper and lower portions of the rotation plate member 121 to communicate with each other, . A part of the air introduced from the outside into the upper portion of the rotating plate member 121 may be introduced into the lower portion of the rotating plate member 121 through the connecting hole 124. As described above, when the exhaust passage forming member 123 is provided on the upper surface of the rotating plate member 121, the connecting hole 124 may be located around the exhaust passage forming member 123.

The plurality of upper blades 131 rotate together with the rotating plate member 121 to generate a first air flow Fa1. The first air flow Fa1 generated by the plurality of upper blades 131 forms a first vortex Fs1 which is rotated downward and the first vortex Fs1 flows through the exhaust pipe 10 And the exhaust flow (Fe) rising toward the exhaust flow (Fe).

The plurality of upper blades 131 may be fixedly mounted on the upper surface of the rotary plate member 121 and radially disposed at predetermined intervals along the circumference of the connection hole 124. Each of the plurality of upper blades 131 may have a shape rising from the upper surface of the rotating plate member 121 and extending in the radial direction.

A first upper wing guide member 132, which extends vertically downward, may be fixed to the bottom edge of the rotating plate member 121. In this case, the plurality of upper wings 131 may extend vertically from the upper surface of the rotating plate member 121 to the lower end of the outer circumferential surface of the first upper wing guide member 132, (131) may be formed in an "a" shape. The first upper wing guide member 132 may be formed in a cylindrical shape having a predetermined outer diameter and the outer diameter of the first upper wing guide member 132 may be the same as the outer diameter of the rotating plate member 121.

In addition, a second upper blade guide member 133 surrounding the plurality of upper blades 131 may be installed at an outer end of the plurality of upper blades 131. The second upper wing guide member 133 may have a cylindrical shape having an inner diameter larger than an outer diameter of the first upper wing guide member 132. Specifically, the inner diameter of the second upper wing guide member 133 is larger than the outer diameter of the first upper wing guide member 132, and the first upper wing guide member 132 and the second upper wing guide member 132 The plurality of upper wings 131 are fixedly installed between the upper blades 133.

A plurality of upper wings 131 may be provided at the upper end thereof with a third upper wing guide member 134 covering a plurality of upper wings 131. The third upper wing guide member 134 may have an inner diameter larger than the outer diameter of the exhaust pipe 10 and the outer rim portion may have an annular plate shape fixedly coupled to the upper end of the second upper wing guide member 133 . Thereby, a predetermined gap is formed between the outer peripheral surface of the exhaust pipe 10 and the inner peripheral surface of the third upper blade guide member 134, and external air is supplied to the upper portion of the rotary plate member 121, And can flow into the upper blade 131 side.

According to the above configuration, the first upper wing guide member 132, the second upper wing guide member 133, and the third upper wing guide member 134 are rotatably supported by the rotation plate member 121 and the plurality of upper wings 131 ). The plurality of upper blades 131 are provided between the rotating plate member 121, the first upper blade guide member 132, the second upper blade guide member 133 and the third upper blade guide member 134 A first air flow passage Pa1 through which the generated first air flow Fa1 passes is formed.

The air flowing from the outside flows through the first air flow passage Pa1 and the plurality of upper wings 131 flows into the first air flow passage Pa1 to rotate the first air flow Fa1 flowing therethrough The first vortex Fs1 thus generated surrounds the exhaust flow Fe that escapes from the lower end of the first air flow passage Pa1 and ascends toward the exhaust pipe 10. The first vortex Fs1 generates the first vortex Fs1, Serves as an air curtain.

Particularly, the plurality of upper vanes 131 extend vertically to the lower end of the outer circumferential surface of the first upper vane guide member 132, so that the first vortex Fs1 passing through the first air flow passage Pa1, It is possible to proceed further in the vertical direction, i.e., further downward. The first vortex Fs1 is continuously subjected to rotational force by the plurality of upper vanes 131 until the first vortex Fs1 passes through the lower end of the first air flow passage Pa1, And the exhaust flow (Fe) formed in the exhaust gas is formed in a spiral shape. This will be described in detail later.

The barrier 135 is provided at a predetermined height on the upper edge of the rotating plate member 121 to suspend the first air flow Fa1 formed by the plurality of upper blades 131. [

Specifically, the barrier 135 is formed between adjacent upper wings 131 of the plurality of upper wings 131. The barrier 135 is formed at a height lower than the height of the plurality of upper wings 131 so that the upper end of the barrier 135 and a plurality of upper wings 131 A predetermined gap G is formed between the bottom surfaces of the projections 134a and 134b. The height of the barrier 135 is preferably 50% to 80% of the height of the upper blade 131. If the height of the barrier 135 is lower than 50% of the height of the upper blade 131, the first air flow Fa1 may not play a role to retard the first air flow Fa1 as described later. If it is higher than 80%, the gap G becomes too narrow, so that the first air flow Fa1 may not pass smoothly through the gap G. [

The first air flow Fa1 flows over the upper end of the barrier 135 through the gap G and the first air flow Fa1 temporarily lags in front of the barrier 135 in this process. When the first air flow Fa1 stays in front of the barrier 135 for a while, the first air flow Fa1 continues to receive the rotational force from the plurality of upper wings 131, The rotational force of the first vortex Fs1 formed by the flow Fa1 is increased. When the rotational force of the first vortex Fs1 rises, the exhaust flow Fe formed inside the first vortex Fs1 may be formed in a spiral shape, which will be described later in detail.

The plurality of lower blades 136 rotate together with the rotating plate member 121 to generate a second air flow Fa2. As will be described later, the second air flow Fa2 generated by the plurality of lower vanes 136 forms a second vortex Fs2 that rotates downward, and this second vortex Fs2 also forms a second vortex Fs2, And serves as an air curtain surrounding the exhaust flow (Fe) rising toward the exhaust pipe (10) in the same manner as the exhaust gas flow (Fs1).

The plurality of lower vanes 136 may be fixed to the bottom surface of the rotating plate member 121 and radially disposed at predetermined intervals along the outer circumference of the connection hole 124. Each of the plurality of lower wings 136 may have a shape rising from the bottom surface of the rotating plate member 121 and extending in the radial direction. The outer diameters of the plurality of lower vanes 136 may be smaller than the outer diameter of the rotating plate member 121.

A first lower wing guide member 137 extending vertically downward between the exhaust hole 122 and the coupling hole 124 may be fixedly installed on the bottom surface of the rotary plate member 121. The first lower wing guide member 137 may have a cylindrical shape having a predetermined outer diameter and a height equal to the height of the plurality of lower wings 136.

In addition, a plurality of lower vanes 136 may be provided at a lower end thereof with a second lower vane guide member 138 covering a plurality of lower vanes 136. The inner edge portion of the second lower wing guide member 138 is fixed to the lower end portion of the first lower wing guide member 137 and is formed into an annular plate shape having an outer diameter smaller than the outer diameter of the plurality of lower wings 136 Lt; / RTI >

In addition, a third lower blade guide member 139 surrounding the plurality of lower blades 136 may be installed at an outer end of the plurality of lower blades 136. The third lower wing guide member 139 may be formed in a cylindrical shape having an outer diameter smaller than the inner diameter of the first upper wing guide member 132 and having the same height as the height of the plurality of lower wings 136.

According to the above configuration, the first lower wing guide member 137, the second lower wing guide member 138, and the third lower wing guide member 139 are rotatably supported by the rotation plate member 121 and the plurality of lower wings 136 ). The plurality of lower wings 136 are provided between the rotary plate member 121, the first lower wing guide member 137, the second lower wing guide member 138 and the third lower wing guide member 139 And a second air flow passage Pa2 through which the generated second air flow Fa2 passes is formed. A predetermined gap is formed between the outer edge portion of the second lower wing guide member 138 and the lower end portion of the third lower wing guide member 139. The gap is formed by the second air flow Fa2 And the second vortex Fs2 becomes an outlet through which the second vortex Fs2 escapes.

The air flowing through the connecting hole 124 formed in the rotating plate member 121 flows through the second air flow passage Pa2 and the plurality of lower wings 136 flows through the second air flow passage Pa2, And the second vortex Fs2 thus generated passes through the outlet of the second air flow passage Pa2 and flows toward the exhaust pipe 10 rising toward the exhaust pipe 10. In this case, And serves as an air curtain surrounding the flow Fe. That is, the plurality of upper vanes 131 generates the first vortex Fs1, and the plurality of lower vanes 136 generate the second vortex Fs2 inside the first vortex Fs1, A double air curtain is formed around the flow Fe.

The first vortex guiding member 141 has a cylindrical shape extending in the vertical direction by a predetermined height while surrounding the outer periphery of the swirler 120. The first vortex guiding member 141 is spaced apart from the outer edge of the swirler 120, specifically, the outer circumferential surface of the second upper vane guide member 133, and the upper end of the swirller 120 (Not shown). Therefore, even if the swirler 120 rotates, the first vortex guiding member 141 does not rotate.

The supporting plate 160 may be fixed to the exhaust pipe 10 and the swirler 120 may be fixed to the supporting plate 160 so as not to be disturbed by the supporting plate 160. [ 160 at a predetermined distance from the bottom surface. The support plate 160 may have at least one, preferably a plurality of air inflow holes 161 to allow air to flow smoothly toward the sweller 120.

The first vortex guiding member 141 may be formed in a cylindrical shape having a predetermined diameter. The height of the outer guide member 141 can be properly determined within a range of about 100 mm to 400 mm, for example, in consideration of the distance between the sweller 120 and the contamination source, the diameter of the sweller 120, and the like.

The first vortex guiding member 141 having the above-described configuration guides the first vortex Fs1 generated by the plurality of upper vanes 131 of the swirler 120 downward, In the vertical direction, that is, downward, as will be described later.

The second vortex guiding member 142 is disposed inside the first vortex guiding member 141. The second vortex guiding member 142 is installed to be fixed to the first vortex guiding member 141. For this, a plurality of first connecting members 151 may be installed between the second vortex guiding member 142 and the first vortex guiding member 141 and extend in the circumferential direction and extend in the radial direction. The second vortex guiding member 142 is fixed to the first vortex guiding member 141 through the plurality of first connecting members 151. The second vortex guiding member 142 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 second vortex guiding member 142 is formed in a cylindrical shape having an inner diameter equal to or greater than the outer diameter of the plurality of lower vanes 136. The second vortex Fs2 generated by the plurality of lower vanes 136 is guided downward by the second vortex guiding member 142 so that the air curtain formed by the second vortex Fs2, Extends in the vertical direction, i.e., downward, which will be described later.

The second vortex guiding member 142 is formed in a cylindrical shape having a diameter smaller than the diameter of the first vortex guiding member 141 so that the second vortex guiding member 142 and the first vortex guiding member 141 A first vortical flow passage Ps1 in the vertical direction through which the first vortex Fs1 generated by the plurality of upper vanes 131 passes is formed.

It is preferable that the first vortex flow passage Ps1 has a shape having a narrow width in the radial direction and a relatively high height in the vertical direction in order to further improve the straightness in the vertical direction of the first vortex Fs1. It is preferable that the vertical height of the first vortex guiding member 141 and the second vortex guiding member 142 is larger than the gap between the first vortex guiding member 141 and the second vortex guiding member 142. [

The lower end of the second vortex guiding member 142 may extend to a lower position than the lower end of the first vortex guiding member 141. The second vortex guiding member 142 can prevent some of the first vortex Fs1 passing through the first vortex flow passage Pa1 from flowing toward the inside, that is, toward the exhaust flow Fe .

On the other hand, a cylindrical inner guide member 143 having a diameter smaller than the diameter of the second vortex guiding member 142 may be disposed inside the second vortex guiding member 142. The inner guide member 143 has a diameter smaller than or equal to the outer diameter of the second lower wing guide member 138. The second vortical flow passage Ps2 in the vertical direction through which the second vortex Fs2 passes may be formed between the inner guide member 143 and the second vortex guide member 142. [

The inner guide member 143 is installed to be fixed to the second vortex guiding member 142. To this end, the inner guiding member 143 and the second vortex guiding member 142 are spaced apart from each other in the circumferential direction A plurality of second connecting members 152 may be provided. The inner guide member 143 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.

An exhaust flow guide member 144 for guiding the exhaust flow Fe toward the exhaust hole 22 formed in the center region of the rotary plate member 121 may be disposed inside the inner guide member 143. The exhaust flow guide member 144 may be formed in a cylindrical shape having an inner diameter similar to the outer diameter of the exhaust hole 122 and disposed below the exhaust hole 122. Therefore, the exhaust flow (Fe) rising from the exhaust area toward the exhaust pipe 10 is guided by the exhaust flow guide member 144, passes through the exhaust hole 122, and is sucked into the exhaust pipe 10 more smoothly .

The exhaust flow guide member 144 is installed to be fixed to the inner guide member 143. An annular connecting plate member 153 is interposed between the inner guide member 143 and the exhaust flow guide member 144 Can be installed horizontally. Therefore, the exhaust flow guide member 144 does not rotate in the same manner as the inner guide member 143.

On the other hand, the first vortex Fs1 passing through the first vortex flow passage Ps1 between the first vortex guiding member 141 and the second vortex guiding member 142 descends downward while rotating, The flow of the first vortex Fs1 may become unstable due to various factors that can not be achieved. For example, by mixing some of the first vortex Fs1 with the second vortex Fs2 and the exhaust flow Fe while flowing inward, not only the first vortex Fs1 but also the second vortex Fs2, The flow (Fe) may also become unstable. If the exhaust flow Fe rising toward the exhaust pipe 10 while rotating in the spiral shape is unstable for the reason described above, there is a problem that the exhaust flow Fe is not sucked into the exhaust pipe 10 smoothly, .

The Applicant has conducted a wide variety of tests in order to prevent the above problems. As a result of various tests, if a plurality of swash plates 170 are installed at the lower end of the first vortex guiding member 141 at intervals in the circumferential direction, the first vortex Fs1 and the second vortex Fs2 are stabilized And finally the exhaust flow (Fe) formed inside the first vortex Fs1 and the second vortex Fs2 is also stabilized, thereby improving the exhaust efficiency. I could. The operation and effect of the plurality of swash plates 170 are based on a result of a lot of tests, and it is thought that a combination of various factors that can not be explained clearly is considered to result.

The plurality of swash plates 170 may be disposed at regular intervals along the circumferential direction at the lower end of the first vortex guiding member 141. The plurality of swash plates 170 may be fixedly installed at the lower end of the first vortex guiding member 141 by using suitable fixing means, for example, a fixing screw 171. Meanwhile, the plurality of swash plates 170 may be fixed to the lower end of the first vortex guiding member 141 by welding. In addition, the plurality of swash plates 170 may be integrally formed with the first vortex guiding member 141.

The plurality of swash plates 170 have a plate shape bent at a predetermined angle? From the lower end of the first vortex guide member 141 to the second vortex guide member 142 side. Further, the plurality of swash plates 170 are installed such that the lower end of the swash plate 170 is positioned higher than or equal to the lower end of the second vortex guiding member 142.

Specifically, as a result of a lot of tests, it was found that the exhaust flow (Fe) was stable when the angle of inclination (θ) of the swash plate 170 was 30 ° to 70 °, The exhaust flow (Fe) was formed most stably.

When six to ten swash plates 170 were installed at regular intervals in the circumferential direction of the first vortex guiding member 141, a favorable result of stabilizing the exhaust flow (Fe) was obtained. The exhaust flow (Fe) was formed most stable when 8 were installed.

The exhaust flow Fe is stable when the sum of the circumferential widths W of the plurality of swash plates 170 is about 20% to 40% of the circumferential length of the first vortex guiding member 141, The exhaust flow (Fe) was formed more stably at the range of about 35% to 35%, and the exhaust flow (Fe) was the most stable at the range of about 25% to 28%.

For example, eight swash plates 170 are provided on a first vortex guide member 141 having a diameter of 300 mm, and a value obtained by summing the circumferential widths W of each of the plurality of swash plates 170 is referred to as a first vortex guide The circumferential length of the first vortex guiding member 141 becomes approximately 942 mm and the sum of the circumferential widths W of each of the eight swash plates 170 The width W of each of the eight swash plates 170 in the circumferential direction is approximately 32 mm.

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

Referring to FIG. 1, when the swirler 120 is rotated by the driving unit 110, external air flows into the sweller 120 through the air inflow hole 161 formed in the support plate 160. Thus, the air introduced from the outside flows into the first air flow passage Fa1 to form the first air flow Fa1 by the plurality of upper wings 131. [ The air introduced from the outside is also introduced into the second air flow passage Fa2 through the connection hole 124 formed in the rotary plate member 121 and is guided by the plurality of lower wings 136 to the second air flow Fa2 . 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.

The first air flow Fa1 forms a first vortex Fs1 that rotates along the direction of rotation of the sweller 120 and the second air flow Fa2 forms a swirl direction Thereby forming a second vortex Fs1 that rotates.

Particularly, since the first air flow Fa1 flows over the barrier 135 provided on the upper edge of the rotating plate member 121, the first air flow Fa1 temporarily lags in front of the barrier 135, The rotational force is continuously transmitted. The plurality of upper vanes 131 extend vertically to the lower end of the outer circumferential surface of the first upper vane guide member 132 so that the first vortex Fs1 passes through the lower end of the first air flow passage Pa1 And is constantly subjected to rotational force by the plurality of upper wings 131 until it goes out. Therefore, the first vortex Fs1 exiting the lower end of the first air flow passage Pa1 has a high rotational force and a high rotational speed.

The plurality of upper vanes 131 extend vertically to the lower end of the outer circumferential surface of the first upper vane guide member 132 so that the first vortex Fs1 passing through the first air flow passage Pa1 is perpendicular Direction, that is, downward.

The first vortex Fs1 is guided vertically downward again by the first vortex guiding member 141 while exiting the lower end of the first air flow passage Pa1. That is, the first vortex Fs1 passing through the outlet of the first air flow passage Pa1 of the swirler 120 is blocked by the first vortex guide member 141, And the first vortex flow guide Ps1 formed between the first vortex flow guide member 142 and the second vortex flow guide member 142. Therefore, the straightness of the first vortex Fs1 in the vertical downward direction is increased. Particularly, since the first vortex flow passage Ps1 has a narrow radial width and a high height in the vertical direction, the first vortex flow Fs1 passing through the first vortex flow passage Ps1 has a vertical directivity Can be further improved.

The second vortex Fs2 is guided vertically downward by the second vortex guiding member 142 while exiting the outlet of the second air flow passage Pa2. That is, the second vortex Fs2 having passed through the outlet of the second air flow passage Pa2 of the swirler 120 is blocked by the second vortex guide member 142, So that the second vortex Fs2 can be straightened downward in the vertical direction as well.

As described above, since the air curtain is formed thicker and thicker by the first vortex Fs1 and the second vortex Fs2, the air curtain is expanded in the vertical direction, so that the contaminated air far from the exhaust pipe 10 is more easily And can be efficiently sucked and exhausted, thereby improving the exhaust efficiency.

Particularly, since the first vortex Fs1 is rotated by the barrier 135 as described above, the second vortex Fs2 formed on the inner side of the first vortex Fs1 also becomes the first vortex Fs1) to increase the rotational force and the rotational speed. The exhaust flow Fe formed inside the second vortex Fs2 is also subjected to the influence of the first vortex Fs1 and the second vortex Fs2 having a high rotational force and rotational speed, 10). As described above, when the exhaust flow Fe rises while rotating in a spiral shape, the exhaust flow Fe can be more smoothly and stably sucked into the exhaust pipe, thereby improving the exhaust efficiency.

In FIG. 1, the first vortex Fs1 and the second vortex Fs2 forming the double air curtain are shown as simply flowing downward, but they are three-dimensionally arranged in the rotational direction of the sweller 120, for example, When viewed from above, it rotates counterclockwise along the circumference of the exhaust flow Fe and descends toward the exhaust area, and the exhaust flow Fe also rises toward the exhaust pipe 10 while rotating counterclockwise.

The first vortex Fs1 and the second vortex Fs2 are stabilized by the plurality of swash plates 170 so that the exhaust flow formed inside the first vortex Fs1 and the second vortex Fs2 (Fe) is stabilized, the exhaust efficiency is further improved.

Hereinafter, another embodiment of the local exhaust system according to the present invention will be described with reference to FIGS. 5 and 6. FIG.

FIG. 5 is a cross-sectional view illustrating a local exhaust system according to another embodiment of the present invention, FIG. 6 is a perspective view illustrating the first vortex guide member, the second vortex guide member, the inner guide member, and the swash plate shown in FIG. 5 .

5 and 6, the local exhaust apparatus 200 according to another embodiment of the present invention also includes a driving unit 110 and an exhaust pipe 10 disposed near the suction end of the exhaust pipe 10, A swirler 120 for generating a first vortex Fs1 and a second vortex Fs2 around the exhaust flow Fe directed toward the first vortex 120 and a second vortex Fs2 arranged to surround the outer periphery of the swirler 120, A first vortex guiding member 241 for guiding the second vortex flow Fs1 downward and a second vortex guiding member 242 for guiding the second vortex Fs2 downward are disposed inside the first vortex guiding member 241 242).

Components other than the first vortex guiding member 241 and the second vortex guiding member 242 among the components of the local exhaust apparatus 200 are the same as those of the constitution of the local exhaust apparatus 100 shown in Figs. Elements and their operations and effects are the same and are given the same reference numerals. Therefore, the description of the same components will be omitted, and only the first vortex guide member 241 and the second vortex guide member 242 will be described.

The first vortex guiding member 241 guides the first vortex Fs1 generated by the plurality of upper vanes 131 of the swirler 120 downward. And extends a predetermined height in the vertical direction. The first vortex guiding member 241 is spaced apart from the outer edge of the sweller 120, specifically, the outer circumferential surface of the second upper wing guide member 133, and the upper end of the swirl member 120 (Not shown). The first vortex guiding member 241 has a stepped cylindrical shape such that the diameter of the lower part is larger than the diameter of the upper part.

The second vortex guiding member 242 is disposed inside the first vortex guiding member 241 and serves to guide the second vortex Fs2 generated by the plurality of lower vanes 136 downward . The second vortex guiding member 242 is installed to be fixed to the first vortex guiding member 241. For this purpose, the second vortex guiding member 242 and the first vortex guiding member 241 are provided in the circumferential direction A plurality of first connecting members 151 extending in the radial direction may be provided. The second vortex guiding member 242 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 second vortex guiding member 142 has an inner diameter that is greater than or equal to the outer diameter of the plurality of lower vanes 136. Like the first vortex guiding member 241, the second vortex guiding member 142 has a stepped cylindrical shape such that the diameter of the lower portion is larger than the diameter of the upper portion. The lower end of the second vortex guiding member 242 may extend to a lower position than the lower end of the first vortex guiding member 241.

As described above, when the first vortex guiding member 241 and the second vortex guiding member 242 have a stepped cylindrical shape, the first vortex guiding member 241 and the second vortex guiding member 242 The diameters of the first vortex Fs1 and the second vortex Fs2 guided by the first vortex guide member 241 and the second vortex guide member 242 are also increased. Accordingly, since the diameter of the double air curtain formed by the first vortex Fs1 and the second vortex Fs2 is increased, there is an advantage that the exhaust area surrounded by the air curtain can be widened.

A passage forming member 281 is provided inside the lower end portion of the second vortex guiding member 241 and a plurality of vertical guide plates 282 are provided between the passage forming member 281 and the second vortex guiding member 241 ) Can be installed.

Specifically, the passage forming member 281 is formed in a ring shape having a diameter and a constant height smaller than the diameter of the second vortex guiding member 241, and the second vortex guiding member 241, And forms a passage through which a part of the second vortex Fs2 exiting the flow passage Ps2 passes. The plurality of vertical guide plates 182 are radially disposed at intervals in the circumferential direction and have a vertically extending plate shape and are inserted into the passage between the passage forming member 281 and the second vortex guiding member 241 And acts to guide some of the second vortices Fs2 vertically.

With the above-described configuration, the straightness of the second vortex Fs2 in the vertical downward direction is further improved, and the air curtain can be formed longer in the vertical direction.

The passage forming member 281 and the plurality of vertical guide plates 282 may be installed inside the second vortex guiding member 141 shown in FIG.

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, 200 ... Local exhaust system 110 .. Drive
111 ... drive motor 112 ... rotation shaft
120 ... Sweller 121 ... Rotating plate member
122 ... exhaust hole 123 ... exhaust passage forming member
124 ... connection hole 126 ... connection
127 ... rotation shaft coupling portion 128 ... rotation shaft insertion hole
129 ... fixing screw 131 ... upper blade
132 ... first upper wing guide member 133 ... second upper wing guide member
134 ... third upper wing guide member 135 ... barrier
136 ... lower blade 137 ... first lower blade guide member
138 ... second lower wing guide member 139 ... third lower wing guide member
141, 241 ... first vortex guide member 142, 242 ... second vortex guide member
143 ... Inner guide member 144 ... Exhaust flow guide member
151 ... first connecting member 152 ... second connecting member
153 ... connecting plate member 160 ... supporting plate
161 ... air inlet ball 170 ... swash plate
171 ... fixing screw 281 ... passage forming member
282 ... vertical guide plate

Claims

A driving unit;
A sweller disposed near the suction end of the exhaust pipe and generating a first vortex and a second vortex around the exhaust flow toward the exhaust pipe by being rotated by the driving unit;
A first vortex guiding member disposed to surround the outer periphery of the swirler and guiding the first vortex downward; And
And a second vortex guiding member disposed inside the first vortex guiding member and guiding the second vortex downward,
In the sweller,
A rotating plate member connected to the driving unit and rotated to form an exhaust hole communicating with the exhaust pipe in a center region and having a connecting hole vertically passing around the exhaust hole;
A plurality of upper blades installed on an upper surface of the rotating plate member to generate a first air flow forming the first vortex;
A barrier disposed at an upper edge portion of the rotating plate member at a height lower than the height of the plurality of upper blades to retard the first air flow;
And a plurality of lower vanes provided on a bottom surface of the rotating plate member to generate a second air flow forming the second vortex.

The method according to claim 1,
A first upper wing guide member of a cylindrical shape extending vertically downward is fixedly mounted on a bottom edge portion of the rotary plate member, and the plurality of upper wings are fixed to the lower end portion of the outer peripheral surface of the first upper wing guide member, Wherein the exhaust pipe is vertically elongated to a predetermined length.

3. The method of claim 2,
Wherein a plurality of upper wings are provided at an outer end thereof with a cylindrical second upper wing guide member surrounding the plurality of upper wings,
A third upper wing guide member having an annular plate shape covering the plurality of upper wings is installed at the upper end of the plurality of upper wings,
And a gap is formed between the upper end of the barrier and the lower face of the third upper wing guide member such that the first air flow can flow over the upper end of the barrier.

4. The method according to any one of claims 1 to 3,
Wherein the height of the barrier is 50% to 80% of the height of the plurality of upper blades.

The method according to claim 1,
Wherein the plurality of lower vanes are disposed on a bottom surface of the rotating plate member and are arranged radially with an interval along an outer circumference of the connection hole.

6. The method of claim 5,
A first lower blade guide member of a cylindrical shape extending vertically downward between the exhaust hole and the connection hole is fixedly installed on a bottom surface of the rotating plate member,
And a second lower blade guide member having an annular plate shape covering the plurality of lower blades is installed at a lower end of the plurality of lower blades,
And a third lower wing guide member surrounding the plurality of lower wings is installed at an outer end of the plurality of lower wings.

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 first vortex guiding member is a cylindrical member spaced apart from an outer edge of the sweller, the upper end being fixed to the support plate,
The second vortex guiding member is a cylindrical member having an inner diameter which is equal to or larger than the outer diameter of the plurality of lower vanes and is disposed to be spaced apart from the swirler under the sweller and fixed to the outer guide member Characterized by local exhaust ventilation.

8. The method of claim 7,
A plurality of first connecting members extending in a radial direction and spaced apart from each other in the circumferential direction are provided between the second vortex guiding member and the second vortex guiding member, Wherein the first vortex guiding member is fixed to the first vortex guiding member.

The method according to claim 1,
A cylindrical inner guide member having a diameter smaller than the diameter of the second vortex guiding member is disposed inside the second vortex guiding member and the inner guide member is provided to be fixed to the second vortex guiding member .

10. The method of claim 9,
Wherein a plurality of second connection members extending in the radial direction and spaced apart in the circumferential direction are provided between the inner guide member and the second vortex guide member and the inner guide member is connected to the second guide member via the plurality of second connection members, And is fixed to the vortex guiding member.

10. The method of claim 9,
A cylindrical exhaust flow guide member for guiding the exhaust flow toward the exhaust hole is disposed inside the inner guide member,
An annular connecting plate member is installed horizontally between the exhaust flow guide member and the inner guide member,
Wherein the exhaust flow guide member is fixed to the inner guide member via the connecting plate member.

The method according to claim 1,
And a plurality of swash plates disposed at a lower end portion of the first vortex guiding member at intervals along the circumferential direction and having a shape bent obliquely toward the second vortex guiding member from the first vortex guiding member Local exhaust system.

13. The method of claim 12,
The lower end of the second vortex guiding member extends to a lower position than the lower end of the first vortex guiding member,
Wherein the plurality of swash plates are installed such that a lower end of the swash plate is located at a height equal to or higher than a lower end of the second vortex guiding member.

The method according to claim 12 or 13,
Wherein the plurality of swash plates are fixedly provided at a lower end portion of the first vortex guiding member at a predetermined interval along the circumferential direction and at a distance of 30 ° from the lower end of the first vortex guiding member toward the second vortex guiding member, To 70 DEG.

15. The method of claim 14,
Wherein the sum of the circumferential widths of the plurality of swash plates is 20% to 40% of the circumferential length of the first vortex guiding member.

The method according to claim 1,
Wherein the first vortex guiding member and the second vortex guiding member have a stepped cylindrical shape such that the diameter of the lower portion is larger than the diameter of the upper portion.

The method according to claim 1,
Wherein a ring-shaped passage forming member having a diameter smaller than the diameter of the second vortex guiding member is provided inside the lower end portion of the second vortex guiding member, and between the passage forming member and the second vortex guiding member, And a plurality of vertical guide plates vertically guiding a part of the vertical guide plate are radially provided at intervals in the circumferential direction.