JP2010069450A - Charging apparatus, dust collector and deodorizing apparatus equipped with charging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a charging apparatus in which materials stuck to a discharge electrode can be removed and charging efficiency can be raised and further to provide a dust collector and a deodorizing apparatus equipped with the charging apparatus. <P>SOLUTION: The charging apparatus is equipped with a counter electrode 20, the discharge electrode 10 which is formed in an endless form and is provided so as to be able to circulate around the counter electrode 20 while holding a predetermined spacing and a first cleaning means 31 which comes into contact with the discharge electrode 10 to remove the materials stuck to the discharge electrode 10. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a charging device, a dust collecting device including the charging device, and a deodorizing device.

  In the prior art, for example, “an electric dust collector that collects dust by generating corona discharge between at least one pair of discharge electrodes and a counter electrode, and charging dust particles in the air with this corona discharge, A surface of the discharge electrode that causes corona discharge is formed on an iron-based alloy having a carbon content of 0.2% by weight or less as a base, and a treatment film including an Al and Cr oxide layer on the base An electric dust collector characterized by being formed "has been proposed (see, for example, Patent Document 1).

JP-A-7-178350 (Claim 1)

  The charging device causes, for example, corona discharge between the discharge electrode and the counter electrode to charge fine particles in the air. Such a charging device is used in a dust collecting device that collects charged fine particles, a deodorizing device that uses active oxygen such as ozone generated by discharge, and the like.

  Such a charging device has a problem in that the discharge location of the discharge electrode and the counter electrode deteriorates due to the discharge.

In addition, when a deposit such as silica adheres to the discharge electrode or the counter electrode, there is a problem that the discharge between the electrodes decreases and the charging efficiency deteriorates. Moreover, this has had the problem that dust collection performance and the generation performance of active oxygen fall.
Such deterioration and deterioration in performance appear more prominently when the charging device is operated for a long time.

  The present invention has been made to solve the above-described problems. At least a deposit attached to a discharge electrode can be removed, and a charging device capable of improving charging efficiency, and a collector provided with the same. It aims at obtaining a dust device and a deodorizing device.

  A charging device according to the present invention includes a counter electrode, a discharge electrode that is formed endlessly, and is provided so as to be able to circulate around the counter electrode while maintaining a predetermined interval. And a first cleaning means for removing deposits on the discharge electrode.

  Since this invention is provided with the 1st cleaning means which contact | abuts to a discharge electrode and removes the deposit | attachment of this discharge electrode, the deposit | attachment adhering to a discharge electrode can be removed, and charging efficiency is improved. Can do.

Embodiment 1 FIG.
FIG. 1 is a schematic configuration diagram of a charging apparatus according to Embodiment 1 of the present invention.
FIG. 2 is a front view and a side view of main parts of the charging device according to Embodiment 1 of the present invention.
FIG. 3 is a configuration diagram of the rotating shaft according to the first embodiment of the present invention.

  In the figure, the charging device in the present embodiment has a discharge electrode 10 and a counter electrode 20. This charging device generates, for example, corona discharge between the discharge electrode 10 and the counter electrode 20, and charges fine particles in the air.

  Further, the charging device includes a rotating shaft 11, a rotating shaft 21, an insulating shield 40, a first cleaning means 31, a second cleaning means 32, a counter electrode drive chain 100, a sprocket 110, a discharge electrode. It has a drive chain 120, a sprocket 130, and a tray 300.

The discharge electrode 10 is formed in an endless shape, and is provided so as to be able to circulate around the counter electrode 20 while maintaining a predetermined interval.
The discharge electrode 10 is formed by plating silver, gold, platinum or nickel on the surface of phosphor bronze, tungsten, copper, nickel, stainless steel, zinc, iron, or an alloy thereof, or a metal thereof. In the first embodiment, for example, the material of the discharge electrode 10 is phosphor bronze, and a nickel plating surface treatment is performed.

  A voltage corresponding to the distance between the discharge electrode 10 and the counter electrode 20 is applied to the discharge electrode 10. For example, when the distance between the discharge electrode 10 and the counter electrode 20 is 8 to 12 mm, a voltage of plus 5.5 to 9.5 kV or minus 6.5 to 10.5 kV is applied to the discharge electrode 10. Is done. The relationship between the installation distance and the discharge voltage will be described later.

  Further, the discharge electrode 10 is formed in a flat cross section having a long side and a short side, and the long side is disposed in parallel with the width direction of the counter electrode 20. For example, the short side is 0.05 to 0.1 mm and the long side is 0.6 to 1.0 mm. The relationship between the shape of the discharge electrode 10 and the voltage / current characteristics will be described later.

The counter electrode 20 is formed in an endless shape, and is provided so as to be able to circulate while maintaining a predetermined distance from the discharge electrode 10.
The counter electrode 20 is formed of a conductive resin in which phosphor bronze, tungsten, copper, nickel, stainless steel, zinc, iron, carbon, or a metal filler is kneaded.

  Further, the width of the counter electrode 20 is at least twice the distance between the discharge electrode 10 and the counter electrode 20. For example, the counter electrode 20 has a width of 17 to 25 mm and a thickness of 0.1 to 0.5 mm. The relationship between the shape of the counter electrode 20 and the distance between the electrodes will be described later.

The rotating shaft 11 supports the discharge electrode 10 and is rotationally driven to circulate the discharge electrode 10.
Specifically, as shown in FIGS. 1 and 2, the rotating shaft 11 is disposed on four rectangular sides that surround the counter electrode 20 at a predetermined interval.
Further, as shown in FIG. 3, the rotating shaft 11 is formed with a guide groove 13 that prevents the discharge electrode 10 from dropping off. A discharge electrode 10 having a flat shape is disposed in the guide groove 13.
Further, a surface treatment for increasing the frictional force with the discharge electrode 10 is applied to the contact surface with the discharge electrode 10. For example, high friction processing or conductive rubber is used.
The rotating shaft 11 is pressed to the outside of the discharge electrode 10 in the circulation direction by an elastic body (spring or the like) not shown. As a result, the discharge electrode 10 is stretched so that a constant tension is applied and bending is reduced.
Further, the rotary shaft 11 is integrally formed with a discharge electrode drive chain 120 and a gear 12 that meshes.

The sprocket 130 is rotationally driven by a discharge electrode drive motor 521 described later.
A discharge electrode drive chain 120 is wound around the sprocket 130. When the sprocket 130 is driven to rotate, the discharge electrode drive chain 120 that meshes with the sprocket 130 circulates.
Thereby, the rotating shaft 11 which meshes with the discharge electrode drive chain 120 is rotationally driven.

The rotating shaft 21 supports the counter electrode 20 and is rotatively driven to circulate the counter electrode 20.
Specifically, as shown in FIGS. 1 and 2, the rotating shaft 21 is arranged vertically with a predetermined interval. An endless counter electrode 20 is wound around the rotating shaft 21.
As shown in FIG. 3, the rotating shaft 21 is formed with a guide groove 23 that prevents the counter electrode 20 from falling off. The counter electrode 20 is disposed in the guide groove 23.
Further, the surface of the contact surface with the counter electrode 20 is subjected to surface processing for increasing the frictional force with the counter electrode 20. For example, high friction processing or conductive rubber is used.
The rotating shaft 21 is pressed to the outside of the counter electrode 20 in the circulation direction by an elastic body (spring or the like) not shown. As a result, the counter electrode 20 is stretched so that a constant tension is applied and bending is reduced.
The rotating shaft 21 is integrally formed with a counter electrode drive chain 100 and an engaging gear 22.

The sprocket 110 is rotationally driven by a counter electrode drive motor 522 described later.
The counter electrode drive chain 100 is wound around the sprocket 110. When the sprocket 110 is driven to rotate, the counter electrode drive chain 100 that meshes with the sprocket 110 circulates and moves.
Thereby, the rotating shaft 21 which meshes with the counter electrode drive chain 100 is rotationally driven.

  In the first embodiment, the discharge electrode drive chain 120 is circulated and moved to rotationally drive the rotary shaft 11. However, the present invention is not limited to this, and the rotary shaft 11 is connected to the discharge electrode drive motor 521. May be rotationally driven directly or via a reduction gear or the like. The same applies to the rotating shaft 21.

  The rotating shaft 11 and the rotating shaft 21 are made of a conductive material. And the high voltage mentioned later is applied to this rotating shaft 11 and the rotating shaft 21, and the said high voltage is applied to the discharge electrode 10 and the counter electrode 20. FIG.

The insulating shield 40 is disposed at a part between the discharge electrode 10 and the counter electrode 20 and is formed of an insulating material. For example, as shown in FIGS. 1 and 2, the counter electrode 20 is disposed above and below the counter electrode 20.
And the space | interval of the discharge electrode 10 and the counter electrode 20 in the arrangement position of this insulation shield 40 is made shorter than the space | interval of the part in which the said insulation shield 40 is not installed. In other words, the distance between the upper and lower portions of the counter electrode 20 and the discharge electrode 10 is made shorter than the distance between the side surface of the counter electrode 20 and the discharge electrode 10.
By providing this insulating shield 40, it is possible to prevent the discharge from concentrating even if the distance between the discharge electrode 10 and the counter electrode 20 is shorter than other portions. This makes it possible to reduce the size of the charging device.

  In addition, it is good also as a structure which does not provide the insulation shield 40. FIG. In this case, the distance between the upper and lower portions of the counter electrode 20 and the discharge electrode 10 is the same as the other portions.

The first cleaning means 31 is in contact with the discharge electrode 10 and removes deposits on the discharge electrode 10.
Specifically, the first cleaning means 31 has a brush that is fixed at a predetermined position and comes into contact with the discharge electrode 10. The brush and the discharge electrode 10 come into contact with each other, and the discharge electrode 10 circulates and moves. Thus, the deposits on the discharge electrode 10 are removed. For example, as shown in FIG. 1, the first cleaning means 31 is installed on the outer peripheral side of the lower part of the discharge electrode 10.
Moreover, the 1st cleaning means 31 is formed with an insulating material. This is to prevent the occurrence of abnormal discharge. For example, a polyethylene brush is used.

The second cleaning means 32 contacts the counter electrode 20 and removes the deposits on the counter electrode 20.
Specifically, the second cleaning means 32 has a brush that is fixed at a predetermined position and abuts against the counter electrode 20, the brush and the counter electrode 20 abut, and the counter electrode 20 circulates and moves. Then, the deposit on the counter electrode 20 is removed. For example, as shown in FIG. 1, the second cleaning means 32 is installed on the outer peripheral side of the lower portion of the counter electrode 20.
The second cleaning means 32 is formed of an insulating material. This is to prevent the occurrence of abnormal discharge. For example, a polyethylene brush is used.
In addition, the 2nd cleaning means 32 is good also as a structure which is not provided in the position directly under the discharge electrode 10, as shown in FIG. This is because the discharge directly under the discharge electrode 10 is small and the amount of deposits is small.

In addition, the installation place of the 1st cleaning means 31 and the 2nd cleaning means 32 is not restricted to this, It can provide in arbitrary positions. A plurality of first cleaning means 31 and second cleaning means 32 may be provided. For example, the first cleaning means 31 may be provided on the upper part of the discharge electrode 10 or may be provided on the inner peripheral side of the discharge electrode 10.
Further, the first cleaning means 31 and the second cleaning means 32 may be any means as long as they can remove deposits attached to the discharge electrode 10, and are not limited to the brush type, but may be of any shape. Also good.

  The tray 300 is disposed below the discharge electrode 10 and the counter electrode 20 and temporarily accumulates the deposits removed by the first cleaning means 31 and the second cleaning means 32.

FIG. 4 is a control block diagram according to Embodiment 1 of the present invention.
As shown in FIG. 4, the charging device includes a control unit 500, a voltmeter 510, a hygrometer 511, a counter electrode drive motor 522, a discharge electrode drive motor 521, and a display unit 530. In addition, the control unit 500 has a timer 501 that measures the passage of a predetermined time.

  The voltmeter 510 corresponds to the voltage measuring means in this invention. The hygrometer 511 corresponds to the humidity measuring means in the present invention.

The voltmeter 510 measures the discharge voltage and inputs a monitor voltage proportional to the discharge voltage to the control means 500.
The hygrometer 511 measures the humidity of the air flowing into the charging device and inputs a signal related to the humidity to the control unit 500.

The control means 500 is constituted by an arithmetic device such as a microcomputer, for example, and controls the operation of the entire charging device based on a stored program.
In addition, the control unit 500 measures the elapse of a predetermined time using the timer 501.
In addition, the control unit 500 controls the discharge electrode drive motor 521 and the counter electrode drive motor 522 by an operation described later.

  The display unit 530 includes, for example, a segment LED, a liquid crystal display element, and the like, and notifies the user of predetermined information regarding the deterioration state based on the output of the control unit 500.

(Electrode cleaning operation)
FIG. 5 is a flowchart showing an electrode cleaning operation according to Embodiment 1 of the present invention.
Hereinafter, the electrode cleaning operation in the first embodiment will be described with reference to FIG.

(S1)
After starting the operation of the charging device, the control unit 500 determines whether the monitor voltage input from the voltmeter 510 is equal to or higher than a predetermined voltage value. For example, it is determined whether or not the monitor voltage is 5V or higher.

Here, the relationship between the deterioration of the discharge electrode 10 and the counter electrode 20 (hereinafter simply referred to as “electrode” when not distinguished) and the discharge voltage will be described.
When a discharge occurs between the discharge electrode 10 and the counter electrode 20, silica (Siox), dust in the air, or the like adheres to the surface of the electrode. Such deposits cause electrode deterioration.
When such deposits adhere, the discharge between the electrodes decreases. On the other hand, in the charged state, the current value between the electrodes is kept constant, so that the discharge voltage increases when the discharge decreases.

FIG. 6 is a diagram illustrating an increase in the monitor voltage due to the elapsed discharge time when the charging current is constant.
As shown in FIG. 6, it can be seen that the monitor voltage increases with the elapsed charge time. The difference in electrode material in FIG. 6 will be described later.
From the above, it is possible to determine the deterioration state by monitoring the discharge voltage.

(S2)
In step S1, when the control unit 500 determines that the monitor voltage is equal to or higher than a predetermined value (5V), it starts the cleaning mode.
In this cleaning mode, the discharge electrode 10 and the counter electrode 20 are circulated and moved, and the first cleaning means 31 and the second cleaning means 32 remove the deposits.
Specifically, the control unit 500 drives the discharge electrode drive motor 521 to rotate. When the discharge electrode drive motor 521 rotates, the sprocket 130 is driven to rotate. When the sprocket 130 rotates, the rotary shaft 11 that meshes with the discharge electrode drive chain 120 is driven to rotate. When the rotating shaft 21 rotates, the discharge electrode 10 circulates.
Then, the adhering matter attached to the discharge electrode 10 is swept off by the brush of the first cleaning means 31 in contact with the discharge electrode 10.

  Similarly, when the counter electrode driving motor 522 is driven to rotate, the control unit 500 rotates the rotating shaft 21 via the sprocket 110 and the counter electrode driving chain 100, and the counter electrode 20 circulates and moves to the second position. Deposits adhering to the counter electrode 20 are swept away by the brush of the cleaning means 31.

  After performing the cleaning mode, the control unit 500 returns to step S1 again and repeats voltage monitoring.

(S3)
When it is determined in step S1 that the monitor voltage is less than the predetermined value (5V), the control unit 500 refers to the timer 501 to determine whether or not a predetermined cumulative charging time has elapsed. For example, it is determined whether the cumulative charge time is 3000 hours or more.

(S4)
If it is determined in step S3 that the accumulated charging time is 3000 hours or longer, the control unit 500 causes the display unit 530 to display information indicating that the electrode is in an aged deterioration state.

(S5)
After the display, the operation of the charging device is terminated after a predetermined time has elapsed.

(S6)
When it is determined in step S3 that the accumulated charging time is less than 3000 hours, the control unit 500 determines whether or not the humidity measured by the hygrometer 511 is equal to or higher than a predetermined value. For example, it is determined whether the humidity is 80% or more.

If it is determined that the humidity is 80% or higher, the control unit 500 starts the cleaning mode in step S2.
Thus, when high humidity air flows into the charging device, the cleaning mode is started. This is because when the humidity increases, the amount of deposits (silica and the like) due to moisture contained in the air increases.

(S7)
When it is determined in step S6 that the humidity is less than 80%, the control unit 500 starts normal operation, returns to step S1, and repeats the above procedure.

  In the first embodiment, the electrode cleaning operation is performed according to the monitor voltage and humidity. However, the present invention is not limited to this, and according to one of the monitor voltage and humidity, Electrode cleaning may be performed. Further, regardless of the monitor voltage and humidity, the electrode cleaning may be performed every predetermined time or may be performed constantly.

  The effect of such electrode cleaning will be described with reference to FIG.

FIG. 7 is a diagram showing the return of charging efficiency by electrode cleaning.
As shown in FIG. 7, it can be seen that the monitor voltage is decreased by performing electrode cleaning. That is, it can be seen that the discharge between the electrodes is increased and the charging efficiency is restored by removing the deposits on the electrodes.
Further, it can be seen that the monitor voltage is recovered (decreased) to the initial state by electrode cleaning regardless of whether the electrode base material is stainless steel or phosphor bronze plated with nickel. That is, the charging efficiency can be improved regardless of the material of the electrode.

(Electrode material)
Next, the durability of the electrode due to the difference in electrode material will be described.
Again, attention is paid to the material of the discharge electrode 10 in FIG.
In conventional charging devices, stainless steel is generally used as the material of the discharge electrode 10. On the other hand, in the first embodiment, as described above, the discharge electrode 10 is made of phosphor bronze and further subjected to nickel plating surface treatment.
As shown in FIG. 6, phosphor bronze has a higher initial voltage than stainless steel, but the subsequent rise angle is gentle, and the superiority appears after a certain time. That is, as in the first embodiment, the material of the discharge electrode 10 is phosphor bronze, so that the deterioration of the electrode proceeds more slowly than that made of stainless steel.

As shown in FIG. 6, when nickel plating is performed, the initial voltage is slightly higher than stainless steel or phosphor bronze, but the rising angle is lower than that of stainless steel or phosphor bronze alone. That is, when phosphor bronze, which is a basic material, is nickel-plated, it does not easily deteriorate and has a further durability effect.
Thus, the effect of reducing the deterioration of the discharge electrode 10 and improving the durability can be obtained by changing the material of the electrode base material and modifying the surface.

(Shape of discharge electrode)
Next, the relationship between the shape of the discharge electrode 10 and voltage-current characteristics will be described.

FIG. 8 is a diagram showing voltage-current characteristics when the discharge electrode is charged to a positive voltage.
FIG. 9 is a diagram showing voltage-current characteristics when the discharge electrode is charged to a negative voltage.
FIGS. 8 and 9 show the measured current values with respect to the applied voltage while changing the length of the long side and the short side of the discharge electrode 10 having a flat shape.

  Based on such voltage-current characteristics, the lengths of the long side and the short side of the discharge electrode 10 can be determined as follows.

The current use area in the charging device is 600 μA or less.
For example, in FIG. 8, when paying attention to a curve having a short side of 0.75 mm and a long side of 0.91, the applied voltage is about 9.4 kV and the current reaches 600 μA. Further, in this curve, it can be seen that the current starts to flow when the applied voltage is about 6.3 kV. Therefore, the range of the applied voltage when using the discharge electrode 10 of this shape is about 6.3 kV to about 9.4 kV. The same can be said for the other curves in FIGS.
Thus, the working voltage range is determined by the shape of the discharge electrode 10. In other words, the shape of the discharge electrode 10 can be determined by the value of the applied voltage or its range.

From the above, when the range of the voltage applied to the charging device is set to plus 5.5 to 9.5 kV or minus 6.5 to 10.5 kV, the short of the discharge electrode 10 can be seen from the curves of FIGS. By analogy of the length of the side and the long side, it is as follows. That is, the lower limit of the short side is 0.05 mm, the upper limit is 0.10 mm, the lower limit of the long side is 0.6 mm, and the upper limit is 1.0 mm.
As described above, when the discharge electrode 10 has a flat cross-section having a long side and a short side and has a shape having the above length, the current use region is used when the use range of the applied voltage is as described above. Can be 600 μA or less. Thereby, the effect which prevents the abnormal discharge by the increase in an electric current can be show | played.

(Distance between electrodes)
Next, the relationship between the distance between the discharge electrode 10 and the counter electrode 20 (interelectrode distance) and the voltage-current characteristics will be described.

FIG. 10 is a diagram showing the voltage-current characteristics depending on the distance between the electrodes.
In FIG. 10, the distance between the electrodes is changed, and the current value with respect to the applied voltage is measured. FIG. 10 shows the characteristics when a positive voltage is applied to the discharge electrode 10.

As described above, the current use region in the charging device is 600 μA or less. Moreover, the range of the applied voltage is plus 5.5 to 9.5 kV.
As shown in FIG. 10, the discharge current increases as the voltage increases. As the distance between the electrodes is longer, the current rise is more gradual. Therefore, the distance between the electrodes needs to be set to a distance that is equal to or less than the current use region (600 μA) at the maximum value of the use voltage (9.5 kV).
On the other hand, it is known that if the distance between the electrodes is too long, the discharge current decreases and the charging efficiency decreases.
Therefore, as shown in FIG. 10, 8 to 12 mm, which is a current of 600 μA or less at a voltage of 9.5 kV, is optimal.

(Shape of counter electrode)
Next, the relationship between the interelectrode distance and the shape of the counter electrode will be described.

FIG. 11 is a diagram showing the relationship between the interelectrode distance and the discharge range.
Moreover, Fig.11 (a) has shown the discharge range. FIG. 11B shows the counter electrode width.
As shown in FIG. 11A, as a result of actually measuring the discharge range of the discharge electrode 10, the range is a range where the angle with the perpendicular to the counter electrode 20 is 45 degrees.
On the other hand, as described above, the distance between the discharge electrode 10 and the counter electrode 20 is set to 8 to 12 mm.
For this reason, the width of the counter electrode 20 is required to be at least twice the distance between the electrodes. Desirably, a width obtained by adding 1 mm to twice the distance between the electrodes is optimal. Therefore, as shown in FIG. 11B, the width of the counter electrode 20 is desirably 17 to 25 mm.

As described above, in the present embodiment, the discharge electrode 10 and the counter electrode 20 are circulated and moved, and the first cleaning means 31 and the second cleaning means 32 remove the deposits on the electrodes.
For this reason, the deposit | attachment adhering to the discharge electrode 10 and the counter electrode 20 can be removed, and charging efficiency can be improved.

Insulating shields 40 are disposed above and below the counter electrode 20.
For this reason, the distance between the upper and lower sides of the counter electrode 20 and the discharge electrode 10 can be shortened, and the charging device can be miniaturized.

The rotating shafts 11 and 21 are formed with guide grooves 13 and 23 that prevent the electrodes from falling off, and are subjected to surface processing for increasing the frictional force with the electrodes on the contact surfaces with the electrodes, It is pressed by the elastic body.
For this reason, the slip of the rotating shafts 11 and 21 and an electrode can be reduced, and the rotational driving force of the rotating shafts 11 and 21 can be transmitted to an electrode. Further, the endless electrode can be stretched so that a constant tension is applied to the outside in the circulation direction and the bending is reduced. As a result, even when the electrodes are circulated, the electrodes can be prevented from being bent, the distance between the electrodes can be kept constant, and stable discharge can be performed.

Further, the control means 500 starts the cleaning mode when the monitor voltage is equal to or higher than a predetermined value.
For this reason, electrode cleaning can be performed in accordance with a decrease in the charging efficiency of the electrode. Thereby, the charging efficiency can be maintained at a predetermined value or more.

Further, the control means 500 starts the cleaning mode when the humidity of the air flowing into the charging device is equal to or higher than a predetermined value.
For this reason, when the deposits (silica etc.) resulting from the water | moisture content contained in air increase, electrode cleaning can be performed. Thereby, the charging efficiency can be maintained at a predetermined value or more.

Further, the discharge electrode 10 is formed in a flat cross section having a long side and a short side, and the long side is installed in parallel with the width direction of the counter electrode 20.
For this reason, the adhering matter adhering to the discharge electrode 10 is easily removed by the first cleaning means 31.

Further, a voltage corresponding to the distance between the discharge electrode 10 and the counter electrode 20 is applied to the discharge electrode 10.
For this reason, a discharge current can be made into a predetermined use area or less. Thereby, abnormal discharge etc. can be prevented.

Further, the width of the counter electrode 20 is at least twice the distance between the discharge electrode 10 and the counter electrode 20, preferably 8 to 12 mm.
For this reason, the width of the counter electrode 20 can be made wider than the discharge range from the discharge electrode 10. Thereby, abnormal discharge can be prevented and charging efficiency can be improved.

The discharge electrode 10 is formed by plating silver, gold, or platinum on the surface of tungsten, copper, nickel, stainless steel, zinc, iron, or an alloy thereof, or these metals, and the counter electrode 20 is , Tungsten, copper, nickel, stainless steel, zinc, or iron, or a conductive resin kneaded with carbon or a metal filler.
For this reason, compared with the conventional stainless steel material, deterioration of an electrode can be reduced and durability of an electrode can be improved.

  In the first embodiment, the first cleaning means 31 and the second cleaning means 32 are fixed at predetermined positions, and the discharge electrode 10 and the counter electrode 20 are circulated and moved. The first cleaning means 31 and the second cleaning means 32 may be moved to remove the deposits.

Embodiment 2. FIG.
FIG. 12 is a schematic configuration diagram of a charging device according to Embodiment 2 of the present invention.
As shown in FIG. 12, the second embodiment is configured to include a plurality of discharge electrodes 10 and counter electrodes 20.

In FIG. 12, the counter electrodes 20-1, 20-2, 20-3 and 20-4 are arranged in parallel to the width direction.
A discharge electrode 10-1 is provided around the counter electrode 20-1. The discharge electrode 10-1 is disposed so as to be able to circulate at an intermediate position between the counter electrode 20-1 and the counter electrode 20-2.

A discharge electrode 10-3 is provided around the counter electrode 20-3. In the discharge electrode 10-3, one side is an intermediate position between the counter electrode 20-2 and the counter electrode 20-3, and the other side opposite to the discharge electrode 10-3 is an intermediate position between the counter electrode 20-3 and the counter electrode 20-4. Are arranged so as to be able to circulate.
That is, the discharge electrodes 10 disposed between the plurality of counter electrodes 20 are disposed so that the distance between the electrodes is kept constant.
Other configurations, shapes, and operations are the same as those in the first embodiment, and the same parts are denoted by the same reference numerals.

  Even with such a configuration, the same effects as those of the first embodiment can be obtained.

  Further, according to the configuration of the second embodiment, it is not necessary to provide the discharge electrodes 10 on all of the plurality of counter electrodes 20 provided. For this reason, compared with providing a plurality of charging devices having the configuration of the first embodiment, the number of components can be reduced, and the cost can be reduced.

  In the second embodiment, the case where the number of the counter electrodes 20 is four has been described. However, the present invention is not limited to this, and an arbitrary number can be provided. In this case, the discharge electrode 10 is provided every other plurality of the counter electrodes 20.

Embodiment 3 FIG.
13 is a schematic configuration diagram of a charging apparatus according to Embodiment 3 of the present invention.
As shown in FIG. 13, the third embodiment has a configuration in which a plurality of counter electrodes 20 are provided and one discharge electrode 10 is provided.

In FIG. 13, the counter electrodes 20-1, 20-2, 20-3 and 20-4 are arranged in parallel to the width direction.
And the discharge electrode 10 is arrange | positioned so that the intermediate position between the some counter electrodes 20 may meander in zigzag form.
That is, the discharge electrode 10 is composed of an endless one, and is located at an intermediate position between the counter electrodes 20-1 and 20-2, an intermediate position between the counter electrodes 20-2 and 20-3, and the counter electrodes 20-3 and 20-. 4 are arranged at intermediate positions of 4 and circulate and move so as to maintain a certain distance.
Other configurations, shapes, and operations are the same as those in the first embodiment, and the same parts are denoted by the same reference numerals.

  Even with such a configuration, the same effects as those of the first and second embodiments can be obtained.

  In addition, according to the configuration of the third embodiment, the number of discharge electrodes 10 can be one, and the number of parts can be further reduced as compared with the first and second embodiments, thereby reducing the cost. Can be made.

  In the third embodiment, the case where the number of the counter electrodes 20 is four has been described. However, the present invention is not limited to this, and an arbitrary number can be provided.

  In the third embodiment, the structure is simplified by using only one discharge electrode 10, but the length of the discharge electrode 10 is longer than that in the first or second embodiment. For this reason, the configuration of the first or second embodiment is preferably used when importance is attached to the discharge electrode 10, and the configuration of the third embodiment is preferably used when simplification of the structure is important.

Embodiment 4 FIG.
In the fourth embodiment, a dust collector provided with the charging device of the first to third embodiments will be described.

The dust collector in this Embodiment is comprised by the charging device of the said Embodiment 1-3 and the dust collector which is not shown in figure.
As described above, the charging device charges dust, which is airborne particles, by corona discharge.
The dust collecting unit adheres the charged dust to the dust collecting plate with Coulomb force. This dust collection part is arrange | positioned in the downstream of a charging device. Further, the dust collecting part is constituted by a dust collecting electrode and a high voltage electrode, and a voltage is applied between the dust collecting electrode and the high voltage electrode.

With such a configuration, air flows into the dust collector, and the charging device charges the dust in the air.
The dust charged by the charging device adheres to the dust collection electrode by the Coulomb force of the high voltage electrode in the dust collection portion. Thereby, the air which passed the said dust collector can be cleaned.

  As described above, in the present embodiment, since the dust collecting device includes the above-described charging device, the same effects as in the first to third embodiments can be obtained.

In addition, the discharge electrode 10 and the counter electrode 20 of the charging device are circulated and moved, and the first cleaning means 31 and the second cleaning means 32 remove the deposits on the electrodes.
For this reason, the deposit | attachment of the said electrode can be removed, without removing a charging device from a dust collector. This eliminates the need for the user to disassemble the dust collector and facilitates maintenance.

Embodiment 5 FIG.
In the fifth embodiment, a deodorizing apparatus provided with the charging device of the first to third embodiments will be described.
The deodorizing apparatus in the present embodiment is configured by the charging apparatus in the first to third embodiments and a catalyst unit (not shown).

The catalyst unit is disposed between the discharge electrode 10 and the counter electrode 20 of the charging device.
The catalyst part has, for example, a honeycomb, corrugated or square opening parallel to the air flow in the ventilation path on a base material such as paper ceramic or cordierite, and mesopores such as zeolite, activated carbon and silica gel. Alternatively, a porous adsorbent having micropores, a porous metal oxide having a pore structure centered on transition metals such as manganese oxide and titanium oxide, and one or more kinds of noble metals such as platinum and palladium are mixed. To be supported on the substrate.

Next, the operation will be described.
First, corona discharge is generated from the discharge electrode 10 to the catalyst portion by the voltage supplied between the discharge electrode 10 and the counter electrode 20.
At this time, odorous gas components and volatile organic compounds in the air that flow into the deodorizing device, such as acetaldehyde and formaldehyde, are once captured by the adsorbing part such as hydrophobic zeolite and manganese oxide on the catalyst part, and the corona discharge It is decomposed by the active species such as oxygen radicals and hydroxyl radicals generated by the above, detoxified, and dissociated from the adsorption part.
Further, adsorption removal and oxidative decomposition of odorous components by the noble metal component on the discharge electrode 10 activated by applying a high voltage to the discharge electrode 10 are performed, and ozone generation is promoted by dissociation of oxygen atoms from the noble metal. The

  In addition, oxygen atoms dissociated from precious metals oxidize odor gas components and volatile organic compound decomposition products decomposed by corona discharge, thereby recombining odor gas components and volatile organic compound decomposition products. Since it can also be prevented, the decomposition of odorous gas components and volatile organic compounds is further promoted.

  As described above, in the present embodiment, since the deodorizing apparatus includes the above-described charging device, the same effects as in the first to third embodiments can be obtained.

In addition, the discharge electrode 10 and the counter electrode 20 of the charging device are circulated and moved, and the first cleaning means 31 and the second cleaning means 32 remove the deposits on the electrodes.
For this reason, the deposit | attachment of the said electrode can be removed, without removing a charging device from a deodorizing apparatus. This eliminates the need for the user to disassemble the deodorizing device, and facilitates maintenance.

It is a schematic block diagram of the charging device which concerns on Embodiment 1 of this invention. It is the principal part front view and side view of the charging device which concern on Embodiment 1 of this invention. It is a block diagram of the rotating shaft which concerns on Embodiment 1 of this invention. It is a control block diagram concerning Embodiment 1 of this invention. It is a flowchart which shows the electrode cleaning operation | movement which concerns on Embodiment 1 of this invention. It is a figure showing the raise of the monitor voltage by the discharge elapsed time when charging current is constant. It is a figure which shows the return of the charge efficiency by electrode cleaning. It is a figure which shows the voltage-current characteristic in case a discharge electrode is charged to a plus voltage. It is a figure which shows the voltage-current characteristic in case a discharge electrode is charged to a negative voltage. It is a figure which shows the voltage-current characteristic by the distance between electrodes. It is a figure which shows the relationship between the distance between electrodes, and the discharge range. It is a schematic block diagram of the charging device which concerns on Embodiment 2 of this invention. It is a schematic block diagram of the charging device which concerns on Embodiment 3 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Discharge electrode, 11 Rotating shaft, 12 Gear, 13 Guide groove, 20 Counter electrode, 21 Rotating shaft, 22 Gear, 23 Guide groove, 31 First cleaning means, 32 Second cleaning means, 40 Insulation shield, 100 Opposing Electrode drive chain, 110 sprocket, 120 discharge electrode drive chain, 130 sprocket, 300 tray, 500 control means, 501 timer, 510 voltmeter, 511 hygrometer, 521 discharge electrode drive motor, 522 counter electrode drive motor, 530 display unit.

Claims (19)

A counter electrode;
A discharge electrode that is formed in an endless shape and is circulated around the counter electrode while maintaining a predetermined interval;
A charging device comprising: a first cleaning unit that contacts the discharge electrode and removes deposits on the discharge electrode. A second cleaning means for contacting the counter electrode to remove the deposit on the counter electrode;
The counter electrode is
2. The charging device according to claim 1, wherein the charging device is formed in an endless shape and is provided so as to be able to circulate while maintaining a predetermined distance from the discharge electrode. The first cleaning means has a brush fixed at a predetermined position and in contact with the discharge electrode,
3. The charging device according to claim 1, wherein the brush and the discharge electrode are in contact with each other and the discharge electrode is circulated and moved to remove deposits on the discharge electrode. The second cleaning means has a brush fixed at a predetermined position and in contact with the counter electrode,
4. The charging device according to claim 2, wherein the brush and the counter electrode come into contact with each other and the counter electrode is circulated and moved to remove deposits on the counter electrode. 5. A plurality of the counter electrodes are provided, and the counter electrodes are arranged in parallel in the width direction,
The charging device according to claim 1, wherein the discharge electrode is provided so as to be able to circulate at an intermediate position between the opposing electrodes. It is disposed in a part between the discharge electrode and the counter electrode, and includes an insulating shield formed of an insulating material,
The charging device according to claim 1, wherein an interval between the discharge electrode and the counter electrode at an arrangement position of the insulating shield is shorter than the predetermined interval.   The charging device according to claim 1, further comprising a rotating shaft that supports at least the discharge electrode and is rotationally driven to circulate and move the discharge electrode. The rotating shaft is formed with a guide groove for preventing the discharge electrode from dropping off,
The contact surface with the discharge electrode is subjected to surface treatment to increase the frictional force with the discharge electrode,
The charging device according to claim 7, wherein the charging device is pressed by an elastic body outside the discharge electrode in the circulation direction. A drive motor for circulating and moving at least the discharge electrode;
The charging device according to claim 1, further comprising a control unit that controls the drive motor. Equipped with voltage measuring means for measuring the discharge voltage,
The charging device according to claim 9, wherein the control unit drives the drive motor in accordance with the discharge voltage. Humidity measuring means for measuring the humidity of the air flowing into the charging device,
The charging device according to claim 9, wherein the control unit controls the drive motor according to the humidity.   The said discharge electrode is formed in the cross-sectional flat shape which has a long side and a short side, and a long side is installed in parallel with the width direction of the said counter electrode, The any one of Claims 1-11 characterized by the above-mentioned. Charging device.   The charging device according to claim 1, wherein a voltage corresponding to a distance between the discharge electrode and the counter electrode is applied to the discharge electrode.   The charging device according to any one of claims 1 to 13, wherein the width of the counter electrode is at least twice the distance between the discharge electrode and the counter electrode. The distance between the discharge electrode and the counter electrode is 8-12 mm,
The charging device according to claim 1, wherein a voltage of plus 5.5 to 9.5 kV or minus 6.5 to 10.5 kV is applied to the discharge electrode. The counter electrode has a width of 17 to 25 mm and a thickness of 0.1 to 0.5 mm.
The charging device according to claim 15, wherein the discharge electrode has a short side of 0.05 to 0.1 mm and a long side of 0.6 to 1.0 mm. The discharge electrode is formed by plating silver, gold, platinum or nickel on the surface of phosphor bronze, tungsten, copper, nickel, stainless steel, zinc, iron, or an alloy thereof, or a metal thereof,
17. The counter electrode according to claim 1, wherein the counter electrode is formed of phosphor bronze, tungsten, copper, nickel, stainless steel, zinc, or iron, or a conductive resin kneaded with carbon or a metal filler. The charging device according to 1.   A dust collector comprising the charging device according to claim 1.   A deodorizing device comprising the charging device according to claim 1.

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