Abstract:
The present invention relates to a dust removal apparatus and, more specifically, to a dust removal apparatus preventing a raw material from absorbing water when coming into contact with the outside air by separating the raw material from dust through an electrical reaction.

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
       [0001]    This Application claims the benefit of priority and is a Continuation application of the prior International Patent Application No. PCT/KR2015/008288, with an international filing date of Aug. 7, 2015, which designated the United States, and is related to the Korean Patent Application No. 10-2014-0102349, filed Aug. 8, 2014, the entire disclosures of all applications are expressly incorporated by reference in their entirety herein. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    1. Field of the Invention 
         [0003]    The present invention relates to a dust removal apparatus, and more particularly to an apparatus for removing dust included in a raw material. 
         [0004]    2. Description of Related Art 
         [0005]    Generally, in apparatuses for removing a foreign substance included in a raw material, a method of separating the foreign substance from the raw material by forced air has widely been used. 
         [0006]    However, such a forced air blowing method requires a large amount of electric power to continuously generate wind, and it is disadvantageous in that a raw material contacts external air and thus vapor included in air intaked from the outside permeates the raw material. 
         [0007]    As illustrated in  FIG. 1 , a foreign material separator includes a recycled raw material supplier  10  to supply a recycled raw material, a dust separator  11  to remove a foreign material from the recycled raw material supplied from the recycled raw material supplier  10 , and a recycled raw material storage unit  12  to collect the recycled raw material from which the foreign material has been removed in the dust separator  11 . 
         [0008]    In addition, the dust separator  11  includes: a main body  16  having a cylindrical shape and including a recycled raw material inlet  13  disposed at an upper side, a foreign material outlet  14 , and a recycled raw material outlet  15  disposed at a lower side; a recycled raw material induction tube  17  extending to a certain length from the recycled raw material inlet  13  and disposed along a central axial line of an inside of the main body to induce a recycled raw material downward; a high-pressure air blowing pipe  18  disposed below the recycled raw material induction tube  17  at a position facing a lower exit thereof to remove a foreign material included in the recycled raw material by applying air-blowing pressure to the recycled raw material dropping downward; and an external high-pressure air blower  19  connected to the high-pressure air blowing pipe  18 . 
         [0009]    The foreign material separator can separate various foreign materials due to the velocity of air discharged from the external high-pressure air blower  19 , but consumes a large amount of electric power to continuously operate the high-pressure air blower  19 . In addition, external air is introduced into the foreign material separator and thus moisture permeates the raw material, resulting in problems with the quality of a product produced from the raw material. 
       RELATED ART DOCUMENT 
     Patent Document 
       [0010]    (Patent document 1) Korean Patent Publication No. 2011-0027049 
       BRIEF SUMMARY OF THE INVENTION 
       [0011]    Therefore, the present invention has been made in view of the above problems, and it is one object of the present invention to provide a dust removal apparatus that minimizes energy consumed for dust removal and prevents moisture from permeating a raw material. 
         [0012]    In accordance with one aspect of the present invention, provided is a dust removal apparatus  1000  including: a main body  100  including a transfer path  110  opening from an upper end to a lower end thereof; a dust discharger  120  extending from a one side of the transfer path  110  to a side surface of the main body  100 ; and an adsorbing unit  130  disposed at a position connecting the transfer path  110  to the dust discharger  120  to adsorb a raw material  1  and dust  2  moving from the upper end to the lower end of the transfer path  110 , wherein the adsorbing unit  130  includes an electrifying unit  131  to electrically charge the raw material  1  and the dust  2 , a roller  132  to adsorb the charged raw material  1  and the charged dust  2  by electrical attraction while rotating, and a first ion generator  121  to release ions to the dust  2  adsorbed on the roller  132  and thus detach the dust  2  therefrom. 
         [0013]    In addition, the roller  132  is surrounded by an inner wall of the main body  100  and face the electrifying unit  131  to form an electrifying path  110 - 2 , the electrifying unit  131  being configured such that a one side thereof is spaced apart from an outer circumferential surface of the roller  132  by a distance limiting introduction of the raw material  1  into the dust discharger  120  and the other side thereof is spaced apart from the outer circumferential surface of the roller  132  by a distance allowing transfer of the raw material  1  and the dust  2 , and the first ion generator  121  is provided at an entrance of the dust discharger  120  through which the dust  2  detached from the roller  132  is introduced into the dust discharger  120 . 
         [0014]    In addition, the dust removal apparatus  1000  includes a raw material storage unit  200  to store a raw material discharged from the transfer path  110 , a dust storage unit  300  to store dust discharged from the dust discharger  120 , and a connection part  140  connecting the dust discharger  120  to the dust storage unit  300 , wherein the connection part  140  includes an air amplifier  141  to suck external air and transfer the external air to the dust storage unit  300 . 
         [0015]    In addition, the main body  100  includes an air inlet  150  provided at a lower end of the dust discharger  120  and spaced apart therefrom, the air inlet  150  connecting an outside of the main body  100  to an entrance of the dust discharger  120 , and the air amplifier  151  sucks, from the outside, air for transferring the dust  2  detached from the roller  132  to the dust storage unit  300 , in cooperation with the air inlet  150 . 
         [0016]    In addition, the main body  100  may further include a controller  111  to control an amount of the raw material  1 , including the dust  2 , introduced from the transfer path  110  to the adsorbing unit  130 . 
         [0017]    In addition, the main body  100  includes a power unit  160  to transfer power to the controller  111  and the roller  132 , the power unit  160  comprising a power transmitting member  161  connecting the controller  111  and the roller  132  to transfer power thereto. 
         [0018]    In addition, the electrifying unit  131  includes a discharge electrode  131 - 1  to emit a large amount of electrons to resin and dust and a high-pressure pulse generator  131 - 2  to supply a high-pressure pulse to the discharge electrode  131 - 1 . 
         [0019]    In addition, the transfer path  110  is provided with a second ion generator  112  at a lower end thereof to remove an electric charge of the raw material  1  detached from the roller  132 . 
         [0020]    In addition, the roller  132  rotates in a direction in which the raw material  1  and the dust  2  move through the transfer path  110 , and the raw material  1  adsorbed on the roller  132  contacts an inner wall of the main body  100  formed between a lower portion of the transfer path  110  and the dust discharger  120  and thus is detached thereby from the roller  132 . 
         [0021]    As is apparent from the fore-going description, the present invention advantageously provides a dust removal apparatus including a rubber roller having an electrostatic attraction force and an electrifying member in order to remove a raw material and dust. 
         [0022]    Thus, the dust removal apparatus according to the present invention consumes a smaller amount of power than that consumed in an existing dust removal apparatus in which forced air must be continuously blown to continuously classify a raw material and dust. 
         [0023]    In addition, unlike an existing dust removal method wherein forced air is blown by introducing external air to separate a raw material and dust and thus the raw material absorbs moisture contained in the external air and, consequently, the raw material from which moisture has been removed by a dryer contains moisture again, a path through which a raw material moves is blocked from the outside and thus exposure of the raw material dried by a dryer to external moisture is minimized. 
         [0024]    Accordingly, deterioration of quality of products due to moisture permeating the raw material is prevented and re-drying of the raw material is not required. 
         [0025]    In addition, unlike an existing apparatus in which, when more than a certain amount of raw materials used for production of products is stored in a raw material storage unit, an operator must stop a dust removal apparatus or must empty the raw material storage unit after stopping, a sensor included in a raw material storage unit controls a motor to adjust the amount of a raw material used for production, and thus, labor consumption needed for maintenance of the dust removal apparatus according to the present invention may be minimized. 
         [0026]    As is apparent from the fore-going description, the present invention advantageously provides a dust removal apparatus including a rubber roller having an electrostatic attraction force and an electrifying member in order to remove a raw material and dust. 
         [0027]    Thus, the dust removal apparatus according to the present invention consumes a smaller amount of power than that consumed in an existing dust removal apparatus in which forced air must be continuously blown to continuously classify a raw material and dust. 
         [0028]    In addition, unlike an existing dust removal method wherein forced air is blown by introducing external air to separate a raw material and dust and thus the raw material absorbs moisture contained in the external air and, consequently, the raw material from which moisture has been removed by a dryer contains moisture again, a path through which a raw material moves is blocked from the outside and thus exposure of the raw material dried by a dryer to external moisture is minimized. 
         [0029]    Accordingly, deterioration of quality of products due to moisture permeating the raw material is prevented and re-drying of the raw material is not required. 
         [0030]    In addition, unlike an existing apparatus in which, when more than a certain amount of raw materials used for production of products is stored in a raw material storage unit, an operator must stop a dust removal apparatus or must empty the raw material storage unit after stopping, a sensor included in a raw material storage unit controls a motor to adjust the amount of a raw material used for production, and thus, labor consumption needed for maintenance of the dust removal apparatus according to the present invention may be minimized. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0031]      FIG. 1  is a perspective view of a conventional dust removal apparatus; 
           [0032]      FIG. 2  is an overall perspective view of a dust removal apparatus according to the present invention; 
           [0033]      FIG. 3  is a cross-sectional view of a dust removal apparatus according to the present invention; and 
           [0034]      FIG. 4  is a cross-sectional view of a dust removal apparatus according to the present invention (When a roller is grounded and thus used as an electrifying body). 
           [0035]      FIG. 5  is a cross-sectional view of a dust removal apparatus according to the present invention (When a roller is grounded and thus inserted, or a roller absorbs the raw material and the dust). 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0036]    Hereinafter, a dust removal apparatus  1000  according to the present invention will be described in detail with reference to the accompanying drawings. 
         [0037]      FIG. 2  is an overall perspective view of a dust removal apparatus  1000  according to the present invention. 
         [0038]    The dust removal apparatus  1000  includes a main body  100 , a raw material storage unit  200 , a dust storage unit  300 , and a dryer  400 . 
         [0039]    Referring to  FIG. 2 , the dust removal apparatus  1000  includes: the main body  100  to independently separate and discharge a raw material  1  and dust  2 ; the dryer  400  disposed at an upper end of the main body  100  to dry the raw material  1  including the dust  2 ; the raw material storage unit  200  disposed at a lower end of the main body  100  to store the raw material  1  separated from the main body  100 ; and the dust storage unit  300  disposed at a side surface of the main body  100  to store the dust  2  separated from the main body  100 . 
         [0040]    In particular, the raw material  1  including the dust  2  is stored in the dryer  400 , the dryer  400  dries the raw material  1  and the dust  2  and introduces the same into the main body  100 , and the main body  100  separates the raw material  1  and the dust  2  that are introduced from the dryer  400  and discharges the raw material  1  and the dust  2  to the raw material storage unit  200  and the dust storage unit  300 , respectively. 
         [0041]      FIG. 3  is a cross-sectional view of the dust removal apparatus  1000 . 
         [0042]    Referring to  FIG. 2  or  FIG. 3 , the main body  100  includes a transfer path  110  to separate and discharge the raw material  1  and the dust  2 , introduced from the dryer  400 , into the raw material storage unit  200  and the dust storage unit  300 , respectively, a dust discharger  120 , an adsorbing unit  130 , a connection part  140 , an air inlet  150 , and a power unit  160 . 
         [0043]    In this regard, the transfer path  110  is divided, based on the adsorbing unit  130 , into three paths: an introduction path  110 - 1  to introduce the raw material  1  and the dust, introduced from the dryer  400 , into the adsorbing unit  130 ; an electrifying path  110 - 2  through which the raw material  1  and the dust  2  are transferred in the adsorbing unit  130 ; and a discharge path  110 - 3  through which the raw material  1  separated from the adsorbing unit  130  is discharged. 
         [0044]    Thus, the raw material  1  and the dust  2 , introduced via the introduction path  110 - 1 , are each independently separated by the adsorbing unit  130  while moving through the electrifying path  110 - 2  formed on the adsorbing unit  130 , and thus, the raw material  1  is discharged to the raw material storage unit  200  via the discharge path  110 - 3  and the dust  2  is discharged into the dust storage unit  300  via the dust discharger  120 . 
         [0045]    In this regard, the adsorbing unit  130  includes an electrifying unit  131  and a roller  132  configured to separate the raw material  1  and the dust  2 , introduced via the introduction path  110 - 1 . 
         [0046]    That is, in the adsorbing unit  130 , the roller  132  is provided at a one side of the electrifying path  110 - 2  and the electrifying unit  131  is provided at the other side of the electrifying path  110 - 2 , and thus, the adsorbing unit  130  performs an electrical action to independently separate the raw material  1  and the dust  2  moving via the electrifying path  110 -  2  formed between the roller  132  and the electrifying unit  131 . 
         [0047]    In particular, the electrifying unit  131  electrically charges the raw material  1  and the dust  2 , introduced via the electrifying path  110 - 2 , and the roller  132  adsorbs the raw material  1  and the dust  2 , having electric charges by the electrifying unit  131 , by electrical attraction. 
         [0048]    In this regard, when a diameter of the electrifying path  110 - 2  formed between the roller  132  and the electrifying unit  131  becomes large, electric power needed for the electrical action occurring in the adsorbing unit  130  is increased. 
         [0049]    That is, in order for a discharge electrode  131 - 1  that applies current to the raw material  1  and the dust  2  to emit high electric power according to the increase in diameter of the electrifying path  110 - 2 , electric power needed in a high-pressure pulse generator  131 - 2  that supplies a high-pressure pulse to the discharge electrode  131 - 1  is increased. 
         [0050]    Thus, it is recommended that the electrifying path  110 - 2  have as small a diameter as possible so long as the raw material  1  and the dust  2  can move therethrough. 
         [0051]    In addition, the discharge electrode  131 - 1  may be spaced apart from an outer circumferential surface of the roller  132  by a certain distance to face the outer circumferential surface thereof. 
         [0052]    In particular, by such a configuration wherein the discharge electrode  131 - 1  is spaced apart from the outer circumferential surface of the roller  132  by a certain distance to face the roller  132 , the raw material  1  and the dust  2  moving through the electrifying path  110 - 2  move along the outer circumferential surface of the roller  132  and thus are smoothly adsorbed onto the roller  132 . 
         [0053]    The raw material  1  adsorbed onto the roller  132  is detached by a first inner wall  101  of the main body  100 , formed between the discharge path  110 - 3  and the dust discharger  120 . 
         [0054]    In this regard, to detach the raw material  1  adsorbed onto the roller  132 , the first inner wall  101  is spaced apart from the outer circumferential surface of the roller  132  by a shorter distance than a diameter of the raw material  1 . 
         [0055]    That is, the roller  132  rotates in a direction in which the raw material  1  and the dust  2  move through the electrifying path  110 - 2  and adsorbs the raw material  1  and the dust  2 , and the adsorbed raw material  1  contacts the first inner wall  101  and thus is detached thereby as the roller  132  rotates. 
         [0056]    In addition, the dust  2  adsorbed onto the roller  132  is detached by the first inner wall  101  or a first ion generator  121  provided at a predetermined position in an entrance of the dust discharger  120  into which the dust  2  detached from the roller  132  is introduced to release ions. 
         [0057]    That is, the first ion generator  121  is provided at the first inner wall  101  or the entrance of the dust discharger  120  to release ions to the dust  2  adsorbed onto the roller  132 , thereby removing the electrical charge therefrom. 
         [0058]    Although a method of using a separation distance between the first inner wall  101  and the roller  132  and a method of using the first ion generator  121  have been described as a method of detaching the raw material  1  and the dust  2  adsorbed onto the roller  132 , various other methods, in which a first protrusion through which the raw material  1  cannot pass is provided at a contact potion between the first inner wall  101  and the discharge path  110 - 3  to detach the raw material  1  from the roller  132 , and second protrusion through which the dust  2  cannot pass is provided at the first inner wall  101  or the entrance of the dust discharger  120  to detach the dust from the roller  132 , may be performed. 
         [0059]    Thus, the method of detaching the raw material  1  and the dust  2  from the roller  132  is not particularly limited so long as it enables the raw material  1  and the dust  2  to be efficiently separated and thus transferred to the raw material storage unit  200  and the dust storage unit  300 , respectively. 
         [0060]    The raw material  1  detached from the roller  132  retains the electrical charge imparted by the electrifying unit  131 , and thus may be adsorbed onto an inner wall of the raw material discharge path  110 - 3  or the raw material storage unit  200  by electrical attraction therebetween. 
         [0061]    Thus, to neutralize the raw material  1 , a second ion generator  112  is provided at the raw material discharge path  110 - 3  to release ions, thereby neutralizing the raw material  1  detached from the roller  132 . 
         [0062]    The dust discharger  120  is connected to the dust storage unit  300  via the connection part  140 . 
         [0063]    In this regard, the dust discharger  120  and the connection part  140  are inclined closer to a ground surface away from the entrance of the dust discharger  120  towards the dust storage unit  300 , and thus the dust  2  detached from the roller  132  may be transferred to the dust storage unit  300  by gravity. However, in order for the dust  2  to effectively move without stopping due to friction, an air amplifier  141  may be provided at the connection part  140 . 
         [0064]    The air amplifier  141  absorbs external air and releases the absorbed air from the other side to the one side of the connection part  140 . 
         [0065]    Thus, the air amplifier  141  serves to move air remaining inside the connection part  140  to the dust storage unit  300 . 
         [0066]    In this regard, the air inlet  150  of the main body  100  is spaced apart from a lower end of the dust discharger  120  by a predetermined distance to absorb, from the outside, air for transferring the dust  2  detached from the roller  132  to the dust storage unit  300 , in cooperation with the air amplifier  141 . 
         [0067]    In particular, the air inlet  150  extends from a lower end thereof to the first inner wall  101 . 
         [0068]    A relationship between the air inlet  150  and the air amplifier  141  will now be described with reference to  FIG. 2 . Compressed air discharged from the air amplifier  141  transfers air of the connection part  140  to the dust storage unit  300  and thus the connection part  140  temporarily forms a vacuum. 
         [0069]    Thus, external air is introduced from the air inlet  150  connected to the connection part  140  and transferred to the connection part  140  in a vacuum state. 
         [0070]    That is, the dust  2  detached from the roller  132  is transferred to the dust storage unit  300  by flow of air from the air amplifier  141  and the air inlet  150 . 
         [0071]    In this regard, to prevent moisture in the external air introduced from the air inlet  150  from permeating the raw material  1  when the external air contacts the raw material  1  separated from the main body  100 , the roller  132  may be disposed close to the second inner wall  102  of the main body  100 , formed between the introduction path  110 - 1  and the dust discharger  120 . 
         [0072]    In addition, although not shown in the drawings, even when the roller  132  is disposed close to the second inner wall  102 , the air introduced from the air inlet  150  may be introduced into the introduction path  110 - 1  and the adsorbing unit  130  in a rotation direction of the roller  132  by the Coand{hacek over (a)} effect, and thus, a blocking barrier may be configured to prevent introduction of air via a space formed between the roller  132  and the second inner wall  102 . 
         [0073]    In addition, the main body  100  may further include a controller  111  at the introduction path  110 - 1  to control the amount of the raw material  1  including the dust  2  introduced from the dryer  400  to the adsorbing unit  130 . 
         [0074]    The controller  111  is connected to the power unit  160  disposed at an upper end of one side of the main body  100  and the roller  132  via a power transferring member  161 . Various members may be used as the power unit  160 , but the power unit  160  may be a motor to continuously transfer power. 
         [0075]    In this regard, the power transferring member  161  may be various connecting elements such as a chain or belt and is not particularly limited so long as it efficiently transfers power generated from the power unit  160  to the roller  132  and the controller  111 . 
         [0076]    In addition, the motor used in the power unit  160  may be configured in singular or plural number and thus may be connected to the roller  132  and the controller  111  via the respective power transferring members  161 , or the roller  132 , the controller  111 , and the power unit  160  may be connected to one another via one connecting member. 
         [0077]    The raw material storage unit  200  includes a sensor  210  to adjust the amount of the raw material  1  discharged through the raw material discharge path  110 - 3  and stored in the raw material storage unit  200 . 
         [0078]    The sensor  210  is provided at an upper end or side surface of the raw material storage unit  200  to measure the height of the raw material  1  stored in the raw material storage unit  200 . 
         [0079]    In addition, when the raw material  1  stored in the raw material storage unit  200  reaches a certain height, the sensor  210  transmits a signal to the power unit  160  to stop operation of the power unit  160 , thereby preventing the raw material  1  from being introduced into the raw material storage unit  200 . 
         [0080]    In particular, the sensor  210  stops the power unit  160  when the raw material  1  stored in the raw material storage unit  200  reaches a certain height, thereby stopping movement of the controller  111  and the roller  132  connected to the power unit  160 , and restarts the power unit  160  when the height of the raw material  1  stored in the raw material storage unit  200  is less than a predetermined height. 
         [0081]    The dust storage unit  300 , in which the dust  2  introduced from the connection part  140  is stored, includes a dust container  310  connected to the connection part  140  and a dust filter  320  connected to an upper end of the dust container  310 . 
         [0082]    The dust container  310  stores the dust  2  introduced from the connection part  140 . 
         [0083]    Thus, the dust container  310  is perforated from an inner side to an upper side thereof and thus a dust storage space  311  for storage of the dust  2  is formed therein. 
         [0084]    In addition, an outer wall of the dust container  310  is configured to have a single step or a plurality of steps and thus the area of the dust storage space  311  increases away from a lower side thereof towards an upper side thereof. 
         [0085]    In addition, the dust container  310  is provided with a dust blocking part  312 , an upper end of which is vertically bent inward and downward, and thus, to prevent air including the dust  2  discharged from the connection part  140  from moving upward while rotating from the lower side to the upper side along an inner wall of the dust container  310 . 
         [0086]    In particular, the air including the dust  2  introduced from the connection part  140  maintains moving force obtained by the air amplifier  141  and thus moves upward along the inner wall of the dust container  310 . 
         [0087]    In this regard, to weaken a force of the air including the dust  2 , moving upward along the inner wall of the dust container  310 , the dust container  310  increases in area away from the lower side thereof towards the upper side thereof and is provided with the dust blocking part  312  at an upper end thereof. 
         [0088]    Thus, clogging of the dust filter  320  with the dust  2  that may occur in the dust filter  320  may be prevented by minimizing direct contact between the dust filter  320  disposed at the upper end of the dust container  310  and the dust  2 . 
         [0089]      FIG. 4  is a view of a dust removal apparatus  1000  according to another embodiment of the present invention. 
         [0090]    Referring to  FIG. 4 , the adsorbing unit  130  may be configured such that the electrifying unit  131  is disposed in the roller  132 . 
         [0091]    In particular, the electrifying unit  131 , provided at the inner wall of the main body  100  and spaced apart from the roller  132  by a predetermined distance to electrically charge the raw material  1  and the dust  2  moving through the electrifying path  110 - 2 , is disposed in the roller  132  so that the raw material  1  and the dust  2  moving through the electrifying path  110 - 2  are electrically charged. 
         [0092]    Thus, the roller  132  and the electrifying unit  131  are configured in an integrated form, and thus, configuration of the adsorbing unit  131  is simplified and, accordingly, manufacturing processes of products may be simplified. 
         [0093]    In addition, the electrifying unit  131  may be disposed at any position so long as it electrically charges the raw material  1  and the dust  2  for smooth adsorption onto the roller  132 . 
         [0094]    Thus, the electrifying unit  131  is provided at a transfer path through which the raw material  1  and the dust  2  move from the dryer  400  to the adsorbing unit  130  or the adsorbing unit  130 , but the position thereof is not particularly limited so long as it enables the raw material  1  and the dust  2  to be smoothly adsorbed onto the roller  132 . 
         [0095]    In addition, as illustrated in  FIG. 5 , the dust removal apparatus  1000  may be configured such that the roller  132  is grounded and inserted thereinto in a state of previously being electrically charged, or the roller  132  adsorbs the raw material  1  and the dust  2  having electric charges obtained by frictional interaction with the controller  111 . 
         [0096]    The above-described embodiments of the present invention should not be interpreted as limiting to the scope of the invention. It should be understood by those skilled in the art that the invention may be applied to various applications, and various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, these changes and modifications are intended to be within the scope of the invention as long as they are obvious to those skilled in the art. 
         [0000]    
       
         
               
             
               
               
             
           
               
                   
               
               
                 DESCRIPTION OF REFERENCE NUMERALS 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 1000: Dust removal apparatus 
                   
               
               
                 1: Raw material 
               
               
                 2: Dust 
               
               
                 100: Main body 
               
               
                 101: first inner wall 
               
               
                 102: Second inner wall 
               
               
                 110: Transfer path 
                 110-1: Introduction path 
               
               
                 110-2: Electrifying path 
                 110-3: Discharge path 
               
               
                 111: Controller 
               
               
                 112: Second ion generator 
               
               
                 120: Dust discharger 
                 121: First ion generator 
               
               
                 130: Adsorbing unit 
               
               
                 131: Electrifying unit 
                 131-1: Discharge electrode 
               
               
                 131-2: High-pressure pulse generator 
               
               
                 132: Roller 
               
               
                 140: Connection part 
               
               
                 141: Air amplifier 
               
               
                 150: Air inlet 
                 151: Air amplifier 
               
               
                 160: Power unit 
                 161: Power transferring member 
               
               
                 200: Raw material storage unit 
               
               
                 210: Sensor 
               
               
                 300: Dust storage unit 
               
               
                 310: Dust container 
                 311: Dust storage space 
               
               
                 312: Dust blocking part 
               
               
                 320: Dust filter 
               
               
                 400: Dryer