JP2018118190A - Cyclone dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cyclone dust collector where the collection efficiency of dust is increased, which does not require a blowing circuit having high pressure loss and which can blow air in a single unit.SOLUTION: In a cyclone dust collector constituted with an axial blower 3, a charging portion 4 consisting of a discharge electrode and a counter electrode and a dust moving portion 14 consisting of an external cylinder 16 and an internal column 15 disposed at the inside of the external cylinder 16 in the order from an upstream side,: a dust discharge slit is disposed on the side wall of the external cylinder 16; an external cylinder electrode is disposed on the whole internal side wall surface of the external cylinder 16; an internal column electrode is disposed on the whole external side wall surface of the internal column 15; dust is charged by discharging between the discharge electrode and the counter electrode; and an electric field is disposed between the external cylinder electrode and the internal column electrode in a direction moving the dust from the internal column 15 to the external cylinder 16.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a dust collector that removes dust in the air by the action of a centrifugal action and an electric field.

  As a conventional cyclone dust collecting apparatus combined with an electric dust collecting action, the one shown in Patent Document 1 is known. Hereinafter, the cyclone dust collector will be described.

  That is, as shown in FIG. 15, the outer cylinder 106 having the suction port 107 from the upper side surface, the inner cylinder 105, the dust hopper 108, and the charging unit 101 installed on the upstream side of the suction port 107 are configured. The charging unit 101 includes a discharge electrode 102 to which a high voltage is applied and a ground electrode plate 103 connected to the ground, and corona discharge is generated between the two. Further, the outer cylinder 106 is connected to the ground, and a high voltage is applied to the inner cylinder 105 by the high voltage power source 104, and an electric field directed from the inner cylinder 105 toward the outer cylinder 106 is formed.

  Dust in the air introduced into the charging unit 101 is charged by collision with air ions generated by corona discharge, and the charged atmospheric dust enters through the suction port 107 and passes between the inner cylinder 105 and the outer cylinder 106. . At this time, since the dust passes between the inner cylinder 105 and the outer cylinder 106 while drawing a swirling flow, it receives a centrifugal force from the inner cylinder 105 toward the outer cylinder 106. The charged dust is subjected to Coulomb force from the inner cylinder 105 toward the outer cylinder 106 by an electric field. The dust collected in the vicinity of the outer cylinder 106 due to the centrifugal force and the Coulomb force in the direction from the inner cylinder 105 toward the outer cylinder 106 moves downward and enters the dust hopper 108. The air from which the dust has been removed is sucked from the bottom of the inner cylinder 105, moves from the inside to the top, and is taken out from the outlet at the top of the inner cylinder. By filling the room with this air, an indoor environment with less dust can be obtained.

  Further, as another conventional cyclone dust collecting device combined with an electric dust collecting action, a device as shown in Patent Document 2 is known. Hereinafter, the cyclone dust collector will be described.

  That is, as shown in FIG. 16, the air is introduced from the suction port 109 and is conveyed to the cylinder 120 provided above while being swung by the blower fan 110. A linear discharge electrode 111 is provided at the center of the cylinder 120, and a grid electrode 112 is provided as a counter electrode inside the side wall of the cylinder. A high voltage power source 114 applies a high voltage to the discharge electrode 111 and a counter electrode 112. Applying 0V causes a discharge to charge dust contained in the air, and at the same time, an electric field provided between the discharge electrode 111 and the grid electrode 112 causes a Coulomb force in the direction from the discharge electrode 111 to the grid electrode 112. obtain.

  The dust is directed to the counter electrode by the centrifugal force generated by the swirl and the Coulomb force generated by the electric field, and passes through the grid electrode 112. Dust that has passed through the grid electrode 112 exits the discharge port 115 and accumulates in the circulation path 119 while circulating through the circulation path 119 by the circulation fan 117. The dust accumulated in the circulation path 119 falls by gravity due to externally applied vibration and is discharged from the dust hopper 118. The air from which the dust has been removed is blown out from the blowout opening 116, and clean air is supplied to the space where it is necessary.

JP-A-3-207463 (FIG. 1) Japanese Patent Laid-Open No. 50-48574 (FIG. 3)

  In the conventional cyclone dust collector described in Patent Document 1, the flow may be disturbed because air is reversed from the bottom to the top when the air moves to the inner cylinder. There exists a subject that it is easy to put in an inner cylinder. In addition, there is a problem that an air flow passage with a large pressure loss is necessary to swirl the air in the apparatus. In addition, it is necessary to connect a blower to the outside, and there is a problem that air cannot be flowed by the device alone.

  Further, the conventional cyclone dust collector described in Patent Document 2 is structurally difficult to reduce the large distance between the discharge electrode and the counter electrode, so that the dust moving distance increases and at the same time the electric field between the discharge electrode and the counter electrode is strengthened. Therefore, there is a problem that it is difficult to improve the dust removal performance.

  Therefore, the present invention solves the above-mentioned conventional problems, and improves the dust removal performance, does not require a large pressure loss blower circuit, and is a cyclone dust collector capable of sending air alone. For the purpose of provision.

  In order to achieve the above object, the present invention provides an air flow inlet, an axial blower, a charging unit composed of a discharge electrode and a counter electrode, an inner cylinder provided inside an outer cylinder and an outer cylinder in order from the upstream side of the air stream on a straight line. A dust moving part, an air flow outlet duct, a dust discharge slit on the side wall of the outer cylinder, an outer cylindrical electrode on the entire inner side wall of the outer cylinder, and an inner cylindrical electrode on the entire outer side wall of the inner cylinder, This is a cyclone dust collector that discharges between the discharge electrode and the counter electrode to charge the dust and provides an electric field between the outer cylinder electrode and the inner cylinder electrode in the direction that the dust moves from the inner cylinder to the outer cylinder. This achieves the intended purpose.

  ADVANTAGE OF THE INVENTION According to this invention, the cyclone dust collector which has higher collection efficiency can be provided. Further, it is not necessary to provide a blower circuit with a large pressure loss to obtain a swirl flow, and it is possible to send air without separately connecting a blower to the outside.

The perspective view of the cyclone dust collector of Embodiment 1 of this indication The perspective sectional view of the cyclone dust collector of Embodiment 1 Side surface sectional view of cyclone dust collector of Embodiment 1 1 is a perspective view of a charging unit according to Embodiment 1. FIG. The perspective view of the inner cylinder of Embodiment 1 The perspective view of the outer cylinder of Embodiment 1 Sectional drawing of the outer cylinder of Embodiment 1 The perspective view of the dust moving part of Embodiment 1 The figure which shows the flow of the air of the cyclone dust collector of Embodiment 1. The perspective view of the cyclone dust collector of Embodiment 2 of this indication Perspective sectional view of the cyclone dust collecting apparatus of the second embodiment The perspective view which shows the centrifugal blower and centrifugal blower holder of Embodiment 2. The perspective view of the centrifugal blower holder of Embodiment 2. The perspective view seen from the back of the centrifugal blower holder of Embodiment 2. Side view of conventional cyclone dust collecting device described in Patent Document 1 Side view of conventional cyclone dust collecting device described in Patent Document 2

  The cyclone dust collecting apparatus according to the first aspect of the present invention includes a gas flow inlet, an axial blower, a charging unit including a discharge electrode and a counter electrode, an outer cylinder, and an inner side of the outer cylinder on a straight line in order from the upstream side of the air stream. It consists of a dust moving part consisting of an inner cylinder, an air flow outlet duct, a dust discharge slit on the side wall of the outer cylinder, an outer cylinder electrode on the entire inner side wall of the outer cylinder, and an inner cylinder on the entire outer side wall of the inner cylinder An electrode is provided, discharge is generated between the discharge electrode and the counter electrode to charge the dust, and an electric field is provided between the outer cylinder electrode and the inner cylinder electrode in a direction in which the dust moves from the inner cylinder to the outer cylinder. is there.

  As a result, centrifugal force is applied to the dust by blowing by the axial flow blower, and Coulomb force is applied to the dust in the same direction as the centrifugal force by discharging, so that dust is removed from the air from the dust discharge slit on the side wall of the outer cylinder in the dust moving part. Since dust can be separated, the dust removal performance can be enhanced without reversing the air direction. Further, it is possible to provide a cyclone dust collector that does not require a blower circuit with a large pressure loss and can send air alone.

  Further, the cyclone dust collector of the form according to claim 2 is a charging unit comprising a gas flow inlet, a centrifugal blower, a centrifugal blower holder having a spiral slope guide in order from the upstream side of the air flow on a straight line, a discharge electrode and a counter electrode. A dust moving part composed of an outer cylinder and an inner cylinder provided inside the outer cylinder, an air flow outlet duct, a dust discharge slit on the side wall of the outer cylinder, an outer cylinder electrode on the entire inner side wall of the outer cylinder, and an inner cylinder An inner cylindrical electrode is provided on the entire outer side wall of the battery, and a discharge is generated between the discharge electrode and the counter electrode to charge the dust, and the outer cylindrical electrode and the inner cylindrical electrode are arranged in such a direction that the dust moves from the inner cylinder to the outer cylinder. An electric field is provided between them.

  As a result, the centrifugal force is applied to the dust by blowing by the centrifugal blower and the Coulomb force in the same direction as the centrifugal force is given by the discharge without causing the air direction to be reversed. Since the dust can be separated from the air by removing the dust outside, the dust removal performance can be enhanced without reversing the direction of the air. Further, it is possible to provide a cyclone dust collector that does not require a blower circuit with a large pressure loss and can send air alone.

(Embodiment 1)
As shown in FIG. 1, the cyclone dust collecting device 1 includes a dust moving unit 14 surrounded by an air flow inlet 2, an axial blower 3, a charging unit 4, and a dust storage box 5 in order from the upstream side of the air flow on a straight line. And a blowout duct 6 on the downstream side of the dust moving unit 14. 1 to 7, the surface viewed from the direction in which air is sucked into the axial blower 3 from the upstream side is the front. 2 and 11, the air flow is indicated by A in the figure.

  As shown in FIG. 1, the axial blower 3 is housed in an axial blower holder 7 and connected to the charging unit 4. The axial blower 3 includes an axial blower blade 8 and an axial blower case 9, and the axial blower blade 8 rotates in a clockwise direction when viewed from the front of FIG. 2 (the direction in which air is sucked). I have to. As a result, air is moved in the direction from the front toward the back of the dust storage box 5, and the air is sent to the charging unit 4 and the following provided on the downstream side. What is important here is that a swirl flow is created on the downstream side of the axial flow fan 3 as shown in FIG. 9, and this swirl flow depends on the rotational speed of the axial flow fan blades 8. It is formed over a distance of 3 to 4 times the diameter in the direction of the axis 10. In this embodiment, the centrifugal force is applied to the dust in the air while having the function of conveying the air using the swirl flow, and at the same time, the action of the Coulomb force described later is applied to move the dust more in the centrifugal direction. It becomes the operation principle of the form.

  3 and 4, the charging unit 4 includes a needle-like discharge electrode 18, a cylindrical inner counter electrode 19 and an outer counter electrode 20, and the discharge electrode 18 with respect to the inner counter electrode 19 and the outer counter electrode 20. The charging unit insulator 21 is fixed to an intermediate position between the inner counter electrode 19 and the outer counter electrode 20 by taking a creepage distance. The discharge electrode 18 is sandwiched between the inner counter electrode 19 and the outer counter electrode 20, and a high voltage is applied to the discharge electrode 18 and a voltage of 0 V is applied to the inner counter electrode 19 and the outer counter electrode 20, thereby leading the tip of the discharge electrode 18. Corona discharge occurs, and the dust passing through the charging unit 4 is charged.

  In order to swirl the swirling flow created by the axial flow fan 3 in the space between the charging unit 4 inner counter electrode 19 and the outer counter electrode 20, the axial flow fan holder 7 has a conical shape with a top portion 39 disposed on the upstream side. The turning promotion part 40 is provided. The top portion 39 is disposed so as to be positioned on the central axis 10 which is the rotation axis of the axial flow fan blade 8.

  As shown in FIG. 3, the dust moving unit 14 takes the creeping distance between the inner cylinder 15, the outer cylinder 16 arranged at a distance on the outer peripheral side of the inner cylinder 15, and the inner cylinder 15 and the outer cylinder 16, It consists of a dust moving part insulator 11 that is fixed on both end faces.

  As shown in FIG. 5, the inner cylinder 15 includes a cylindrical inner cylinder base body 22 having insulating properties, and an inner cylinder electrode 23 provided on the side wall surface of the inner cylinder base body 22.

  As shown in FIG. 6, the outer cylinder 16 is provided with an outer cylinder electrode 25 on the inner side wall surface of a cylindrical outer cylinder base body 24 having insulation properties, and penetrates the side wall of the outer cylinder base body 24 and the outer cylinder electrode 25. It has a structure provided with a dust discharge slit 26. The dust discharge slit 26 is an elongated slit in the axial direction of the outer cylinder 16. Further, as shown in FIG. 7, a tangent line extending in a clockwise direction from the inner wall of the outer cylinder 16 is provided so as to penetrate the side wall of the outer cylinder 16.

  That is, the dust moving unit 14 is configured by providing the inner cylinder 15 concentrically on the inner side of the outer cylinder 16 in accordance with the central axis 10 of the axial flow fan blade 8, and as shown in FIG. Both are fixed while being insulated by the dust moving part insulator 11 provided in each. The inner cylinder 15 and the outer cylinder 16 form a cylindrical inner / outer cylinder space 17.

  As shown in FIG. 2, the dust that has entered the dust moving section 14 passes through the inner and outer cylinder spaces 17 while turning clockwise as viewed from the front. By applying a high voltage having the same polarity as the discharge electrode 18 of the charging unit 4 to the inner cylindrical electrode 23 and a voltage of 0 V to the outer cylinder electrode 25, an electric field is formed in the inner and outer cylinder space 17, and the axial flow fan blade 8 Coulomb force in the same direction as centrifugal force can be applied to dust that has been receiving centrifugal force by rotation.

  FIG. 9 shows the flow of air inside the cyclone dust collector obtained by the fluid analysis in the above configuration. If it demonstrates in detail, as shown in FIG. 2, the axial-flow fan blade | wing 8 is rotating in the clockwise direction. A swirling flow is created on the downstream side of the axial blower 3. As a result, air is moved in the direction from the front toward the back of the dust storage box 5, and a swirling flow is sent to the axial-flow fan holder 7. In the axial blower holder 7, the swirl promoting unit 40 flows toward the outer periphery as it flows downstream, and a large centrifugal force is applied. Then, the air is sent to the charging unit 4 and the following provided on the downstream side. The dust charged by the charging unit 4 is sent to the dust moving unit 14 on the downstream side of the charging unit 4 while further turning.

  The dust obtained by the centrifugal force due to the rotation of the axial blower blade 8 and the Coulomb force due to the electric field in the inner and outer cylinder spaces 17 moves in the direction from the inner cylinder 15 toward the outer cylinder 16, and is moved from the dust discharge slit 26 to the outside of the outer cylinder 16. Is discharged. Further, as shown in FIG. 7 which is a BB sectional view in FIG. 6, the dust discharge slit 26 is provided so as to extend in a clockwise direction when viewed from the front and in a tangential direction of the inner wall of the outer cylinder 16. Therefore, dust that turns clockwise as viewed from the front is easily discharged.

  Since the dust moving unit 14 is surrounded by the dust storage box 5, the dust discharged from the dust discharge slit 26 drifts in the dust storage box 5 and settles on the surface of the dust storage box 5 by adhesion or settling. Can be deposited. Thereby, clean air from which dust has been removed is supplied from the outlet duct 6 on the downstream side of the dust moving unit 14. When the accumulated dust is removed, the dust storage box lid 12 is opened so that the dust can be sucked out by a vacuum cleaner or the like. Alternatively, it is also possible to suck out the accumulated dust by inserting a nozzle of a vacuum cleaner into the dust suction hole 13 provided in the dust storage box 5. Incidentally, the dust suction hole 13 is closed except when dust is sucked out.

  In the present embodiment, the operation principle is summarized as follows. The swirl flow produced by the axial flow fan 3 on the downstream side of the axial flow blower 3 is directly sent in the axial flow direction without being inverted, and the charging unit 4 having a cylindrical ventilation region and the dust movement By providing the portion 14, the centrifugal force and the Coulomb force in the same direction as the centrifugal force are applied to the dust while blowing, the dust is removed outside the dust moving portion 14, and the dust is separated from the air. By doing so, centrifugal force can be applied to the dust while obtaining the blowing function, and at the same time, a dust collector having high collection efficiency with small energy can be obtained.

(Embodiment 2)
Next, a perspective view of the cyclone dust collecting apparatus according to the second embodiment is shown in FIG. 10, and a perspective sectional view is shown in FIG.

  As shown in FIGS. 10 and 11, the cyclone dust collecting device 27 according to the second embodiment of the present disclosure includes, on a straight line, the airflow inlet 2 in order from the upstream side of the airflow, the centrifugal blower 28 and the centrifugal blower holder in order from the upstream side. 29, the dust moving unit 14 surrounded by the charging unit 4 and the dust storage box 5, and the blowout duct 6 on the downstream side of the dust moving unit 14. The charging unit 4, the dust storage box 5, and the dust moving unit 14 have the same configuration as in the first embodiment. However, it differs in the following points.

  That is, the dust discharge slit 26 provided in the outer cylinder 16 of the dust moving unit 14 is different from FIG. 6, as shown in FIG. 11, as shown in FIG. It is provided in a shape extending in the tangential direction of the inner wall.

  Further, a centrifugal blower 28 is provided in place of the axial blower 3. As shown in FIG. 11, the centrifugal blower 28 is housed in a centrifugal blower holder 29 and connected to the charging unit 4. Here, the surface viewed from the direction in which air is sucked into the centrifugal blower 28 from the upstream side is defined as the front surface.

  The centrifugal blower holder 29 is a cylindrical body having a concentric cross section with the charging unit 4 and the outer cylinder 16, and as shown in FIG. 13, a spiral that divides the upstream side and the downstream side in the direction of the central axis 31 of the cylindrical body. A slope guide 32 is provided.

  The spiral slope guide 32 is a spiral plate that turns around the central axis 31 of the cylindrical body, and includes a slope outlet 33 that allows the front and back of the spiral slope guide 32 to communicate with each other. The slope outlet 33 is formed by a gap (spiral pitch) between plate bodies formed in a spiral shape. Further, the spiral slope guide 32 includes a centrifugal blower fixing hole 38 that houses the centrifugal blower 28 in a central portion including the central axis 31 of the cylindrical body.

  As shown in FIG. 12, the centrifugal blower 28 is a sirocco fan that includes a centrifugal blower blade 34 and a centrifugal blower case 35 and has a centrifugal blower outlet 37.

  After being stored in the centrifugal blower holder 29 so as to fit into the downstream centrifugal blower fixing hole 38 shown in FIG. 13, the centrifugal blower holder lid 30 is put on the upstream side as shown in FIG. The centrifugal blower 28 is fixed by aligning the central axis 31 of the cylindrical body and the rotational axis of the centrifugal blower blade 34. The centrifugal blower outlet 37 is disposed so that the centrifugal blower suction port 36 is disposed in front of the cyclone dust collecting device 27 and air is blown toward the inner wall inside the centrifugal blower holder 29.

  In the above configuration, the centrifugal blower 28 sucks air in a direction perpendicular to the front surface from the centrifugal blower suction port 36 as shown in FIG. That is, air is sucked from the front of the cyclone dust collector 27.

  As shown in FIG. 12, the centrifugal blower blade 34 rotates counterclockwise when viewed from the front, and after the air is sucked from the centrifugal blower suction port 36, the centrifugal blower outlet 34 is bent at an angle of 90 degrees. It is blown out from 37. At this time, as a result of fluid analysis, it is known that the air existing between the centrifugal fan case 35 and the centrifugal fan blades 34 is moved so as to rotate at substantially the same speed as the rotational speed of the centrifugal fan blades 34.

  By providing the configuration of the centrifugal blower holder 29 according to the present embodiment, the flow of air that is substantially the same as the rotational speed of the centrifugal blower blades 34 can be used as a swirling flow as it is. The blown air can be placed on the spiral slope guide 32 of the centrifugal fan holder 29. The spiral slope guide 32 has an action of promoting the swirling of the swirling flow. After exiting the slope outlet 33, the air enters the downstream charging unit 4 and the dust moving unit 14 while turning counterclockwise as viewed from the front.

  The centrifugal force is applied to the dust contained in the air by this swirling flow. The charging unit 4 is charged, and the dust moving unit 14 receives the Coulomb force from the inner cylinder 15 toward the outer cylinder 16 to be removed from the air, and is discharged from the dust discharge slit 26 and accumulated in the dust storage box 5. This principle is the same as that described in the first embodiment of the present invention.

  Since the centrifugal blower 28 is less slippery between the centrifugal blower blades 34 and the air, it is possible to forcibly rotate the air, and the cyclone dust collecting device 27 described in the second embodiment simultaneously produces a swirling flow. This is useful when it is necessary to push the air strongly downstream when a long duct is connected.

  The cyclone dust collector according to the present disclosure can collect dust with high efficiency, does not require a blower circuit with a large pressure loss, and can send air alone. Therefore, it is useful as a device for purifying indoor air by circulating indoor air or purifying outdoor air and putting it indoors.

DESCRIPTION OF SYMBOLS 1 Cyclone dust collector 2 Airflow inflow port 3 Axial flow fan 4 Charging part 5 Dust storage box 6 Blowing duct 7 Axial flow fan holder 8 Axial flow fan blade 9 Axial flow fan case 10 Central shaft 11 Dust moving part insulator 12 Dust storage Box cover 13 Dust suction hole 14 Dust moving part 15 Inner cylinder 16 Outer cylinder 17 Inner / outer cylinder space 18 Discharge electrode 19 Inner counter electrode 20 Outer counter electrode 21 Charging part insulator 22 Inner column base body 23 Inner column electrode 24 Outer cylinder base body 25 External cylinder electrode 26 Dust discharge slit 27 Cyclone dust collector 28 Centrifugal blower 29 Centrifugal blower holder 30 Centrifugal blower holder lid 31 Central axis 32 Spiral slope guide 33 Slope outlet 34 Centrifugal blower blade 35 Centrifugal blower case 36 Centrifugal blower inlet 37 Centrifugal blower Air outlet 38 Centrifugal blower fixing hole 39 Top 4 Turning promoting portion

Claims (4)

Consists of an airflow inlet, an axial blower, a charging unit consisting of a discharge electrode and a counter electrode, a dust moving unit consisting of an outer cylinder and an inner cylinder inside the outer cylinder, and an airflow outlet duct And
A dust discharge slit on the side wall of the outer cylinder, an outer cylinder electrode on the entire inner side wall of the outer cylinder, and an inner column electrode on the entire outer side wall of the inner cylinder,
A cyclone that discharges between a discharge electrode and a counter electrode to charge dust and forms an electric field between the outer cylinder electrode and the inner cylinder electrode in a direction in which the dust moves from the inner cylinder to the outer cylinder Dust collector. Dust movement consisting of an air flow inlet, a centrifugal blower, a centrifugal blower holder with a spiral slope guide, a charging part consisting of a discharge electrode and a counter electrode, and an outer cylinder and an inner cylinder inside the outer cylinder Part, consisting of airflow ducts,
A dust discharge slit on the side wall of the outer cylinder, an outer cylinder electrode on the entire inner side wall of the outer cylinder, and an inner column electrode on the entire outer side wall of the inner cylinder,
A cyclone collector comprising a discharge between a discharge electrode and a counter electrode to charge the dust, and an electric field is provided between the outer cylinder electrode and the inner cylinder electrode in a direction in which the dust moves from the inner cylinder to the outer cylinder. Dust equipment. The cyclone dust collector according to claim 1 or 2, further comprising a dust storage box that encloses the dust moving part. The cyclone dust collector according to claim 3, wherein a lid for opening the dust storage box or a suction hole into which a suction nozzle of a vacuum cleaner is inserted is provided.

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