KR101684353B1 - Nonpowered dust collector - Google Patents

Abstract

The present invention relates to a non-powered dust collector which is attached to a running vehicle to remove wear particles in a subway rail or scattering dust in a road without power. To achieve this, the non-powered dust collector according to an embodiment of the present invention comprises: a hollow body which has an air inlet and an air outlet; a dust collecting part which stirs the flow direction of air flowing into the body to collect the dust unable to follow the flow of the air; and a suction part which allows the air to be sucked to the air inlet when the vehicle is moved.

Description

[0001] NONPOWERED DUST COLLECTOR [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a dust-free power dust collecting apparatus, and more particularly, to a dust collecting apparatus that attaches to a running vehicle and collects dust with no force when the vehicle is traveling.

Each year the severity and risk of air pollution is emphasized. In recent years, there has been an increase in the awareness of fine dust particles, which are highly susceptible to cancer. This air pollution problem can not be an exception both inside and outside.

The main factors that generate dust in the city center are various transportation means. In addition to the dust generated by friction with the ground during vehicle operation, the dust that has already been on the ground may be scattered again. Particularly, in the case of subways, the dust generated by the friction between the wheel and the rail of the train is significant, and the problem of air pollution is more serious due to the structural problem that the once generated dust can not easily escape.

In terms of space utilization, the subway is often underground, and the air conditioner is operating at a rate of 80% for outdoor air and 20% for outdoor air circulation in the passenger compartment. Although the air is sucked into the passenger compartment through a filter or the like, not all the particles are filtered. Furthermore, recently, a large number of PSD (Platform Screen Door) is installed in each station to improve platform safety and air quality, and the concentration of fine dust in underground tunnels is rather increasing. Therefore, lowering the concentration of fine dust in the underground tunnel can be a fundamental solution for improving the air quality in the passenger compartment.

Currently, underground tunnels are being cleaned periodically with water to remove fine dust in the tunnel. However, the flush cleaning method does not collect fine dust, but it only sinks for a while, so when the water dries, the fine dust splashes again. Therefore, in order to reduce the fine dust concentration in the underground tunnel, a dust collector capable of directly removing fine dust in the underground tunnel is needed. Such a dust collecting device is required to suck and collect fine dust in real time while traveling in an underground tunnel of a vast urban railway. As the density of the fine dust in the subway operation tunnel is 7.874 g / cm ³ , the largest iron component occupies the most, so that the dust collector using the inertial force of the fine dust can be effectively used.

Patent Publication No. 10-2009-0094512 (September 9, 2009)

The present invention provides a non-powered dust collecting apparatus capable of collecting minute dust in real time by using traveling wind which is attached to a vehicle and is driven by a vehicle, which is designed to quickly remove fine dust using an inertial force. .

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a non-powered dust collecting apparatus attached to a vehicle, comprising: a hollow body having an air inlet and an air outlet; A dust collecting part for dust collecting dust that can not follow the flow of air by disturbing the flow direction of air flowing into the body; And a suction portion for sucking and accelerating air to the air inlet as the vehicle moves.

According to an embodiment of the present invention, the dust collecting part includes a first dust collector, and the first dust collector forms a flow path for moving air in a zigzag shape, and flows along the flow while air flows through the flow path It may include a dust collecting plate for collecting dust that falls without falling.

According to an embodiment of the present invention, the first dust collector includes a plurality of subfilters including two barrier ribs facing each other and a barrier wall connecting one end of the two barrier ribs, The filter is disposed such that the openings facing the blocking walls face each other and one of the two partitions is inserted into the opening of the other subfilter to form the flow path, As shown in FIG.

According to an embodiment of the present invention, the two partition walls extend horizontally, the plurality of subfilters are arranged in the longitudinal direction, and the partition wall positioned below one of the two partition walls forms the dust collecting plate.

According to an embodiment of the present invention, the two partition walls may extend vertically, the plurality of subfilters may be arranged in the lateral direction, and one or more of the dust collecting plates may be horizontally arranged to connect the two partition walls .

According to an embodiment of the present invention, the two partition walls may be arranged to be inclined such that the upper portion is positioned closer to the suction portion than the lower portion.

According to an embodiment of the present invention, the dust collecting plate may be provided with a scatter preventing wall formed by bending the end portion of the dust collecting plate on the opening side.

According to an embodiment of the present invention, the dust collecting plate may be coated with an adhesive or may be provided with a magnet.

According to an embodiment of the present invention, the dust collecting unit may further include a second dust collector disposed between the suction unit and the first dust collector, wherein the second dust collector is inclined at a predetermined angle with respect to the air flowing direction And a dust collecting box which is partially opened toward the suction portion and into which the dust that has collided with the blade flows along the air flow.

According to an embodiment of the present invention, the second dust collector includes a plurality of blades that are sequentially spaced apart from the suction portion in the direction of the dust collecting tube, and when viewed from the suction portion, May not be covered by the blade disposed immediately before.

According to an embodiment of the present invention, the second dust collector includes a plurality of dust collecting modules separated by a plurality of partition walls, and each of the dust collecting modules may include the blade and the dust collecting container.

According to an embodiment of the present invention, the suction unit may include a plurality of guide vanes that divide the air introduced through the air inlet and introduce the air into each of the plurality of dust collection modules.

 According to an embodiment of the present invention, a flow buffer for stabilizing the flow of disturbed air in the second dust collector may be formed between the first dust collector and the second dust collector.

According to an embodiment of the present invention, when the vehicle is running in a reverse direction, air is sucked in through the air outlet, flows out through the air inlet, and sucked and accelerated by the air outlet as the vehicle reverses .

1 is a schematic side cross-sectional view of a non-powered dust collector according to an embodiment of the present invention.
2 is a side cross-sectional view showing a first dust collector of the non-powered dust collector of FIG.
3 is a schematic view showing a modified embodiment of the first dust collector of the non-powered dust collector of FIG.
4 is a side view showing a modified embodiment of the first dust collector of the non-powered dust collector of FIG.
5 is a cross-sectional view showing a modified embodiment of the sub filter of the non-powered dust collector of FIG.
6 is a side sectional view showing a second dust collector of the non-powered dust collector of FIG.
7 is a schematic side cross-sectional view of a non-powered dust collector according to another embodiment of the present invention.
8 is a schematic side cross-sectional view of a non-powered dust collector according to another embodiment of the present invention.
9 is a graph showing the dust collection rate depending on the size of the dust collected by the non-powered dust collector of FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for describing the embodiments of the present invention are illustrative, and thus the present invention is not limited thereto. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Where the terms "comprises", "having", "done", and the like are used in this specification, other portions may be added unless "only" is used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.

In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.

In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or " direct " is not used, one or more other portions may be located between the two portions.

It is to be understood that elements or layers are referred to as being "on " other elements or layers, including both intervening layers or other elements directly on or in between. Like reference numerals refer to like elements throughout the specification.

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

The sizes and thicknesses of the individual components shown in the figures are shown for convenience of explanation and the present invention is not necessarily limited to the size and thickness of the components shown.

It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other partially or entirely and technically various interlocking and driving is possible as will be appreciated by those skilled in the art, It may be possible to cooperate with each other in association.

Hereinafter, a non-powered dust collector according to an embodiment of the present invention will be described with reference to the accompanying drawings.

Referring to FIG. 1, a non-powered dust collecting apparatus 100 according to an embodiment of the present invention includes a body 110, a suction unit 120, and a dust collecting unit 130.

The body 110 is hollow, and is configured such that air flows in from the outside, passes through the inside thereof, and flows out to the outside. The body 110 has an air inlet 111 through which air flows and an air outlet 112 through which air flows when a vehicle (not shown) travels in a forward direction. On the other hand, it should be noted that when the vehicle travels in the reverse direction, air may flow into the air outlet 112 and air may flow out into the air inlet 111.

The body 110 is fixed to the outside of the vehicle. At this time, the body 110 is arranged so that the direction in which the air inlet 111 and the air outlet 112 are opened is parallel to the running direction of the vehicle so that the outside air can naturally flow into the inside of the body 110 . In addition, in consideration of the fact that a lot of dust is generated from the bottom surface when the vehicle is traveling, the body 110 is fixed to the lower portion of the vehicle, so that the dust collection efficiency can be further increased.

The air introduced into the body 110 through the air inlet 111 passes through the suction unit 120. The suction portion 120 is formed so as to have a reduced cross-sectional area from the air inlet 111 to the dust collecting portion 130, thereby increasing the speed of the air to be introduced. Accordingly, it is possible to mitigate the decrease in the flow velocity of the air flowing into the body 110 due to the flow resistance inside the body 110, compared to the case of the free flow.

The suction portion 120 may be formed so that the vertical cross-sectional area of the inner space with respect to the air inlet / outlet direction gradually decreases toward the inner side. For example, in the present embodiment, when the body 110 is attached to the lower portion of the vehicle, the lower portion of the air inlet 111 and the air outlet 112 side body 110 may be formed to extend downward. Thereby, the flow of the outside air can be collected and sucked and accelerated. That is, the suction unit 120 increases the flow rate and flow rate of the air passing through the inside of the body 110, thereby improving the dust collecting performance. On the other hand, as the size of the air inlet 111 increases, the flow rate of the air sucked increases and the flow rate increases. However, since the space is limited when the dust collector 100 is attached to the lower portion of the vehicle, .

Meanwhile, the suction unit 120 may be disposed on both sides of the dust collecting unit 130. That is, the suction portion 120 may be disposed not only on the air inlet 111 but also on the air outlet 112 side. Thereby, when the vehicle is running in reverse, air can be sucked into the air outlet 112 and the sucked air can be accelerated.

The air that has passed through the suction unit 120 moves to the dust collecting unit 130. The dust collecting unit 130 is configured to disturb the flow direction of the air flowing into the body 110. This allows the dust contained in the air to trap the dust by preventing it from following the flow of the air.

Referring to FIG. 2, the dust collecting unit 130 may include a first dust collector 131 that forms a flow path F so that air moves in a zigzag fashion.

The first dust collector 131 includes a plurality of subfilters 132 including two barrier ribs 133 facing each other and a barrier wall 134 connecting one end of the two barrier ribs 133 to each other. The plurality of sub-filters 132 are arranged so that openings facing the blocking wall 134 face each other. One of the two partition walls 133 is inserted into the opening of another sub filter 132 to form a flow path F. [

The air that has flowed into the first dust collector 131 can not proceed in the flow direction but is obstructed by the blocking wall 134 facing the first dust collector 131. The dust contained in the air collides with the blocking wall 134. At this time, the flow direction of the air is reversely reversed and flows between the partition walls 133 of the two facing sub-filters 132. Then, the air is once again obstructed by the blocking wall 134 of the sub-filter 132 on the suction portion 120 side. Further, the dust contained in the air collides with the blocking wall 134. As a result, the air flows out of the first dust collector 131 in the same direction as the initial inflow direction.

In this way, while the air passes through the first dust collector 131, the flow direction is reversed several times, and in the process, the dust having a relatively large inertia force can not follow the flow and collides with the blocking wall 134, 1 dust collector 131 as shown in Fig. Therefore, the dust that has collided against the blocking wall 134 while the air is moving through the flow path F is gathered and enlarged to fall off the blocking wall 134, and fall by gravity.

The first dust collector 131 may be modified by a plurality of sub-filters 132 extending and extending in various directions. In addition, the first dust collector 131 may further include a dust collecting plate 135 for collecting the falling dust. Such a dust collecting plate 135 is included in a different manner depending on the extending direction and the arrangement direction of the sub filter 132. This will be described in detail below.

2, the first dust collector 131 has a structure in which two partition walls 133 constituting each sub filter 132 extend horizontally and a plurality of sub filters 132 are arranged in the longitudinal direction ≪ / RTI >

At this time, the partition 133 positioned below the two partition walls 133 may form the dust collecting plate 135. [ The dust contained in the air can not follow the flow because of inertia and collides against the blocking wall 134, so that the falling dust accumulates on the dust collecting plate 135. The scattering plate 135 is formed with the scattering-preventing wall 136 formed by bending the opening-side end portion upward, thereby preventing the collected dust from being influenced by the air flow. The scattering-preventing wall 136 may be formed as an inwardly bent claw shape or a U-shaped shape to more reliably prevent the collected dust from scattering again.

FIG. 3 is a schematic view showing a modified embodiment of the first dust collector 131 of the non-powered dust collector 100 of FIG. 3 (a) is a side view of the first dust collector 131 ', and FIG. 3 (b) is a plan sectional view of the first dust collector 131' along the line A-A in FIG. 3C is a perspective view of the single sub filter 132 'separated for the sake of convenience.

Referring to FIG. 3, the first dust collector 131 'is formed by vertically extending two partition walls 133' constituting each sub filter 132 ', and a plurality of sub filters 132' As shown in FIG.

At this time, the first dust collector 131 'may include a dust collecting plate 135' which is connected horizontally by connecting the two partition walls 133 '. Thereby, it is possible to trap dusts which are included in the air and moved and whose inertia is reduced. Although the dust collecting plate 135 'may be disposed only on the lowermost side, it is preferable that a plurality of dusts falling in a falling direction may be swept back into the air flow before the dust collecting is performed. The position and the number of the dust collecting plates 135 'may be appropriately selected in consideration of design conditions.

Referring to FIG. 4, a plurality of vertically extending subfilters 132 '' as shown in FIG. 4 may be arranged to be inclined such that the upper portion is located closer to the suction portion (not shown) than the lower portion. As a result, an air flow downward in the first dust collector 131 '' is formed, thereby reducing the scattering of dust.

On the other hand, though not shown, the dust collecting plates 135 and 135 'are coated with an adhesive or a magnet, so that the collected dust can be prevented from being scattered again. In addition, the dust collecting plates 135, 135 ', and 135' 'are removably formed, so that collected dusts can be removed and reused.

Referring to FIG. 5, the subfilter may have various cross-sectional shapes. The cross-sectional shape of the subfilter may be U-shaped as shown in FIG. 5A or polygonal as shown in FIG. 5B. 5 (c), the subfilters disposed on the left and right sides may have different shapes, or the subfilter itself may be asymmetric as shown in FIG. 5 (d).

The dust collecting unit 130 may further include a second dust collector 141 disposed between the suction unit 120 and the first dust collector 131.

6, the second dust collector 141 includes a plurality of blades 142 inclined at a predetermined angle with respect to the inflow direction of the air introduced from the suction unit 120, And a dust collecting container 143 through which the dust that has been opened and collided with the blade 142 flows along with the air flow.

The blade 142 is disposed so as to be inclined so as to face its upper surface with respect to the air inflow direction. The blades 142 are arranged in order from the suction portion 120 toward the dust collection chamber 143. The blades 142 can also be arranged such that the upper surface of the air-impinging blades 142 when viewed from the suction portion 120 is not covered by the blade 142 disposed immediately before. That is, each of the blades 142 may be arranged in series and higher than the lower end of the blade 142 located at the back of the blade 142 positioned at the front. The blade 142 is disposed until it reaches the upper inner wall of the body 110 where the second dust collector 141 is disposed. In this manner, air can be prevented from flowing between the blades 142 without collision with the blade 142, so that the dust collecting efficiency of the second dust collector 141 can be increased.

A part of the dust contained in the air flowing into the second dust collector 141 (shown by a dotted line) does not follow the flow of air (as indicated by an arrow) and collides with the blade 142 as shown in FIG. Since the angle of the blade 142 is inclined at an acute angle to the flow direction, the particles striking the front blade 142 move toward the rear blade 142 and collide again. By repeating this process, the dust finally enters into the dust collecting container 143.

The dust collecting box 143 is disposed behind the last blade 142 to position the inlet in the air inflow direction. When air is introduced into the dust collecting container 143, the dust contained in the air loses its inertial force and is accumulated on the inner wall. In order to prevent the collected dust from being scattered again, the dust collecting container 143 is preferably formed so that its cross section has a hook shape as shown in FIG.

Meanwhile, the second dust collector 141 may include a plurality of dust collecting modules 141a to 141d that are separated by a plurality of separation walls 144. In addition, each of the dust collecting modules 141a to 141d is provided with a blade 142 and a dust collecting container 143 separately. Thereby, the dust collection efficiency can be improved as compared with the case where one dust collection module is used.

1, the suction unit 120 includes a plurality of guide vanes 121 for branching the air introduced through the air inlet 111 and introducing the air into each of the plurality of dust collection modules 141a to 141d . Through this, air can be uniformly introduced into each of the dust collecting modules 141a to 141d, thereby further increasing the dust collecting efficiency.

Each space in the suction unit 120 partitioned by the plurality of guide vanes 121 may be formed such that the vertical cross-sectional area of the inner space with respect to the air inlet / outlet direction decreases gradually toward the inner side.

Meanwhile, a flow buffer 151 may be formed between the first dust collector 131 and the second dust collector 141. The flow buffer 151 stabilizes the flow of disturbed air in the second dust collector 141. The flow buffering portion 151 is disposed at a distance equal to or more than 1/3 of the length of the second dust collector 141 so that the outlet flow of the second dust collector 141 and the flow path of the inlet flow of the first dust collector 131 are connected without the vortex region good.

When the second dust collector 141 is composed of the plurality of dust collecting modules 141a to 141d, the flow split at the second dust collector 141 is merged again at the flow buffering part 151, And the second dust collector 141 can be eliminated.

The suction unit 120, the first dust collector 131, the second dust collector 141, and the flow buffering unit 151 may be arranged in various orders according to the use environment, purpose, etc. of the present invention. This will be described in detail below.

Referring to FIG. 1 again, the non-powered dust collector 100 according to the present embodiment includes a suction unit 120, a second dust collector 141, a flow buffer 151, a first dust collector 131, 151, the second dust collector 141, and the suction unit 120 in this order. Thereby, even if the vehicle is operated in the forward direction or in the reverse direction, a large amount of dust can be collected in both directions.

Referring to FIG. 7, the non-powered dust collector 200 according to another embodiment of the present invention includes a suction unit 220, a second dust collector 241, a flow buffering unit 251, a second dust collector 241, (220). According to the non-powered dust collector 200 of the first dust collector removed, the flow rate of the introduced air is relatively low due to a relatively low pressure drop, and is effective for removing large particles of 5 μm or more.

Referring to FIG. 8, the non-powered dust collector 300 according to another embodiment of the present invention may be arranged in the order of a suction unit 320, a first dust collector 331, and a suction unit 320. According to the non-powered particulate dust collector 300 having the second dust collector removed, it is possible to remove coarse particles and large particles of 2.5 μm or more using only the first dust collector 331.

For reference, it should be noted that the components arranged in the respective embodiments are different only in the order of arrangement, and the features of each component are the same as those described above. In addition, in each embodiment, the components are arranged symmetrically so that even if the vehicle travels in both directions, even if the vehicle travels in the forward direction or the reverse direction, the dust can be continuously collected.

For example, in the case of the non-powered dust collecting apparatus 100 of FIG. 1, when the vehicle travels in the forward direction, air flows into the air inlet 111 side and flows into the suction portion 120, the second dust collector 141, And the first dust collector 131 in order. Thereafter, the air flows out to the outside regardless of the dust collecting up to the air outlet 112.

9 is a graph showing the dust collection efficiencies for the aerodynamic diameter of the dust contained in the air at a free flow velocity of 9 m / s in the non-powered dust collectors 100, 200, and 300 according to the respective embodiments of the present invention. It is a graph.

Referring to FIG. 9, in the case of the non-powered dust collector 300 including only the first dust collector (shown by dashed lines), the dust collecting efficiency is improved from particles having a diameter of 2.5 μm or more in general. As shown in FIG. Further, in the case of the non-powered dust collector 200 including only the second dust collector (shown by a solid line), the dust collecting efficiency of particles having a diameter of 7 μm is the highest. Further, in the case of the non-powered dust collector 100 including both the first dust collector and the second dust collector (shown by a dotted line), most of the particles having a diameter of 7 m or more can be collected. As described above, in the non-powered dust collector 100 according to the embodiment of the present invention, the second dust collector 141 is continuously disposed together with the first dust collector 131, thereby efficiently collecting dust of various sizes.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, it is to be understood that the present invention is not limited to those embodiments and various changes and modifications may be made without departing from the scope of the present invention. . Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, it should be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

110: Body
111: air inlet
112: air outlet
120, 220, 320:
121: Guide vane
130: Dust collector
131, 131 ', 131 ", 331: a first dust collector
132, 132 ', 132'':
133, 133 ': partition wall
134: blocking wall
135, 135 ': Collecting plate
136: Shatterproof wall
141, 141a, 141b, 141c, 141d, and 241:
142: blade
143: House paints
144: separating wall
151, 251:
100, 200, 300: Non-powered dust collector
10: Vehicle

Claims (14)

1. A non-powered dust collector attached to a vehicle,
A hollow body having an air inlet and an air outlet;
A dust collecting part for dust collecting dust that can not follow the flow of air by disturbing the flow direction of air flowing into the body; And
And a suction portion for sucking and accelerating air to the air inlet as the vehicle moves,
Wherein the dust collecting unit includes a first dust collector,
The first dust collector includes a plurality of subfilters including two partition walls facing each other and a blocking wall connecting one end of the two partition walls to each other to form a flow path for moving the air in a zigzag pattern, And a dust collecting plate for collecting the falling dust that can not follow the flow while moving through the flow path,
Wherein the plurality of subfilters are arranged such that openings facing the blocking wall face each other and one of the two partition walls is inserted into the opening of the other subfilter to form the flow path, Is configured to collide against the blocking wall. delete delete The method according to claim 1,
The two partition walls extend horizontally, the plurality of subfilters are arranged in the longitudinal direction,
And a partition wall positioned below the two partition walls forms the dust collecting plate. The method according to claim 1,
The two partition walls extend vertically, the plurality of subfilters are arranged in the lateral direction,
Wherein at least one of the at least one dust-collecting plate is horizontally disposed to connect the two partition walls. 6. The method of claim 5,
Wherein the two partition walls are inclined so that an upper portion thereof is closer to the suction portion than a lower portion. The method according to claim 1,
Wherein the dust collecting plate is provided with a scattering preventing wall formed by bending the end of the opening toward the dust collecting plate. The method according to claim 1,
Wherein the dust collecting plate is coated with an adhesive or a magnet. The method according to claim 1,
Wherein the dust collecting unit further includes a second dust collector disposed between the suction unit and the first dust collector,
The second dust collector includes:
A blade which is inclined at a predetermined angle with respect to an air flow direction;
And a dust collecting box partially opened toward the suction portion and through which dust that has collided with the blade flows along the air flow. 1. A non-powered dust collector attached to a vehicle,
A hollow body having an air inlet and an air outlet;
A dust collecting part for dust collecting dust that can not follow the flow of air by disturbing the flow direction of air flowing into the body; And
And a suction portion for sucking and accelerating air to the air inlet as the vehicle moves,
Wherein the dust collecting portion further includes a first dust collector and a second dust collector disposed between the suction portion and the first dust collector,
The first dust collector includes a dust collecting plate which forms a flow path for allowing air to move in a zigzag shape and collects dust falling while the air can not flow along the flow path,
The second dust collector includes a plurality of blades, each of which is arranged at an angle to the inflow direction of the air at an angle and is disposed in turn in the inflow direction of the air, a dust portion that is partially opened toward the suction portion, And a collecting box through which the air flows,
And the impact surface of the blade in which air collides when viewed from the suction portion is not covered by the blade disposed immediately before. 11. The method of claim 10,
Wherein the second dust collector comprises a plurality of dust collecting modules divided by a plurality of separation walls,
Wherein the dust collecting module is provided with the blade and the dust collecting container, respectively. 12. The method of claim 11,
Wherein the suction unit includes a plurality of guide vanes for branching the air introduced through the air inlet and introducing the air into each of the plurality of dust collection modules. 11. The method of claim 10,
Between the first dust collector and the second dust collector,
And a flow buffer for stabilizing the flow of disturbed air in the second dust collector is formed. The method according to claim 1,
Air flows through the air inlet and flows out through the air inlet when the vehicle is running in a reverse direction,
Further comprising a suction unit for sucking and accelerating air to the air outlet as the vehicle reverses.

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