JP2018140319A - Dust collector and air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust collector treating organic matter in air by electric discharge where heat quantity generated by the electric discharge is reduced and organic matter discharged without being treated can be reduced.SOLUTION: A dust collector 10 includes: a vent hole 32h passing air; a grounded ventilation electrode 32; counter electrodes 31a-31e arranged opposed to the ventilation electrode 32; and power sources 40a-40e alternately applying non-discharge voltage not making insulation breakdown of air between the ventilation electrode 32 and each counter electrode and discharge voltage making insulation breakdown of air.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a dust collector and an air cleaner that generate discharge in the air.

  Conventionally, a method using corona (streamer) discharge, which is dark discharge, is known as a method for removing dust composed of organic substances such as pollen floating in the air (see, for example, Patent Document 1). This is a method in which pollen and the like are decomposed by low-temperature oxidation by corona discharge.

JP-A-2005-300111

  In order to process organic substances such as pollen in a shorter time, a method using glow discharge can be considered. This makes it possible to instantaneously completely oxidize (burn) the organic matter.

  However, when glow discharge is used, the amount of heat generated at the time of discharge is larger than when corona discharge is used. Further, in order to reduce the amount of heat, a method of intermittently discharging can be considered. However, in this case, there is a problem that organic substances flying when the discharge is stopped cannot be processed.

  Therefore, the present invention is a dust collector that processes organic matter in the air by discharge, reduces the amount of heat generated by the discharge, and can reduce organic matter discharged without being treated, and an air equipped with the dust collector The purpose is to provide a cleaner.

  In order to solve the above-described problem, an aspect of the dust collector according to the present invention includes a vent electrode that allows air to pass therethrough, is grounded, a counter electrode that is disposed to face the vent electrode, and A non-discharge voltage that does not cause dielectric breakdown of air between the ventilation electrode and the counter electrode; and a power source that alternately applies a discharge voltage that causes dielectric breakdown of the air to the counter electrode.

  Moreover, in order to solve the said subject, the one aspect | mode of the air cleaner which concerns on this invention is equipped with the said dust collector.

  ADVANTAGE OF THE INVENTION According to this invention, it is a dust collector which processes the organic substance in air by discharge, Comprising: The dust collector and air cleaner which can reduce the calorie | heat amount which generate | occur | produces by discharge and can reduce the organic matter discharged | emitted without a process can be provided. .

FIG. 1 is a block diagram showing an outline of the overall configuration of the dust collector according to the first embodiment. FIG. 2 is a perspective view showing an appearance of an example of a ventilation electrode and a counter electrode of the dust collector according to the first embodiment. FIG. 3 is a graph showing an example of a waveform of a voltage applied to each counter electrode of the dust collector according to the first embodiment. FIG. 4 is a graph showing an example of a waveform of a voltage applied to each counter electrode of the dust collector according to the first embodiment. FIG. 5 is a block diagram showing an outline of the overall configuration of the dust collector according to the second embodiment. FIG. 6 is an external view of an air cleaner according to a modification. FIG. 7 is an external view of an air conditioner according to a modification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Each of the embodiments described below shows a specific example of the present invention. Therefore, the numerical values, shapes, materials, components, component arrangement positions, connection forms, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

  Each figure is a schematic diagram and is not necessarily illustrated strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, The overlapping description is abbreviate | omitted or simplified.

(Embodiment 1)
[1-1. overall structure]
The overall configuration of the dust collector according to Embodiment 1 will be described with reference to the drawings.

  FIG. 1 is a block diagram showing an outline of the overall configuration of a dust collector 10 according to the present embodiment. FIG. 2 is a perspective view showing an appearance of an example of the ventilation electrode 32 and the counter electrodes 31a to 31e of the dust collector 10 according to the present embodiment.

  The dust collector 10 is a device that processes organic substances in the air by electric discharge. The dust collector 10 processes organic matter such as pollen floating in the air introduced in the direction of the arrow in the drawing using a fan (not shown) or the like. In the present embodiment, the pressure of the air introduced into the dust collector 10 is atmospheric pressure. Thereby, since it can introduce into dust collector 10 without adjusting the pressure of air of atmospheric pressure, the composition of dust collector 10 can be simplified. In addition, the pressure of the air introduced into the dust collector 10 should just be substantially equal to atmospheric pressure, and does not need to correspond with atmospheric pressure exactly | strictly. For example, the pressure of the air introduced into the dust collector 10 may have a difference of about 10% from the atmospheric pressure. As shown in FIG. 1, the dust collector 10 includes a charging unit 20 and a processing unit 30.

  The charging unit 20 charges (charges) the organic substance 90 floating in the air by introducing it between the electrode pair that has generated the corona discharge, thereby generating the charged organic substance 91. The charging unit 20 includes a ground electrode 22 a and a ground electrode 22 b, a corona discharge electrode 21, and a charging power source 25.

  The ground electrode 22a and the ground electrode 22b are disposed to face the corona discharge electrode 21 and are grounded. The shape of the ground electrode 22a and the ground electrode 22b is not particularly limited, and may be, for example, a flat plate shape. The material for forming the ground electrode 22a and the ground electrode 22b is not particularly limited as long as it is a conductive material, and may be stainless steel, for example.

  The corona discharge electrode 21 is disposed to face the ground electrode 22a and the ground electrode 22b, and a voltage is applied by the charging power source 25. The shape of the corona discharge electrode 21 is not particularly limited, and may be a thin line, for example. The material for forming the corona discharge electrode 21 is not particularly limited as long as it is a conductive material, and may be, for example, stainless steel or tungsten. The distance between the corona discharge electrode 21 and the ground electrode 22a and the ground electrode 22b is, for example, about 15 mm.

  The charging power source 25 generates a corona discharge between the corona discharge electrode 21, the ground electrode 22a, and the ground electrode 22b by applying a voltage to the corona discharge electrode 21. In the present embodiment, the charging power source 25 applies a voltage of, for example, about 9 kV to the corona discharge electrode 21.

  The processing unit 30 processes the organic matter 90 such as pollen floating in the air. The processing unit 30 includes a ventilation electrode 32, a counter electrode 31a to a counter electrode 31e, and a power source 40a to a power source 40e.

  As shown in FIG. 2, the ventilation electrode 32 is an electrode having a ventilation hole 32 h that allows air to pass therethrough. Further, as shown in FIG. 1, the ventilation electrode 32 is grounded. The ventilation electrode 32 has, for example, a mesh shape as shown in FIG. 2 and has a plurality of ventilation holes 32h. As a result, it is possible to realize an electrode having high air permeability and capable of easily adsorbing the charged organic substance 91. The material for forming the ventilation electrode 32 is not particularly limited as long as it is conductive, and is, for example, tungsten.

  The counter electrode 31a to the counter electrode 31e are electrodes arranged to face the ventilation electrode 32, as shown in FIGS. The number of counter electrodes may be one or plural. In the case where the dust collector 10 includes a plurality of counter electrodes, the magnitude of the voltage applied to each counter electrode and the application timing can be adjusted. The shape of each counter electrode is not particularly limited, but in the present embodiment, it is needle-shaped as shown in FIGS. Thereby, since an electric field can be concentrated in each counter electrode, discharge can be started at a lower voltage.

  The power source 40a to the power source 40e are configured so that the non-discharge voltage that does not cause dielectric breakdown of the air between the ventilation electrode 32 and the counter electrode 31a to counter electrode 31e and the discharge voltage that causes dielectric breakdown of the air alternately. Applied to the counter electrode 31e. When a discharge voltage is applied to each counter electrode, glow discharge is generated between the ventilation electrode 32 and each counter electrode. Thereby, the charged organic substance 91 in the discharge region can be instantaneously completely oxidized. The non-discharge voltage and discharge voltage applied to each counter electrode by each power source will be described in detail later.

[1-2. Operation]
Next, operation | movement of the dust collector 10 which concerns on this Embodiment is demonstrated. Here, two operation examples are given.

[1-2-1. Operation example 1]
Operation example 1 of the dust collector 10 according to the present embodiment will be described with reference to the drawings.

  FIG. 3 is a graph showing an example of a waveform of a voltage applied to each counter electrode of the dust collector 10 according to the present embodiment.

  As described above, the power source 40a to the power source 40e alternately apply the discharge voltage and the non-discharge voltage to the counter electrode 31a to the counter electrode 31e, respectively.

  First, the discharge voltage will be described with reference to FIG.

  As shown in FIG. 3, first, in the discharge start period, the power source 40a to the power source 40e apply a voltage V1 that is equal to or higher than the discharge start voltage to the counter electrode 31a to the counter electrode 31e, respectively. As a result, a discharge is generated between the ventilation electrode 32 and each counter electrode. The value of the voltage V1 may be set as appropriate according to the distance between the ventilation electrode 32 and each counter electrode, and is, for example, about 10 kV. The application time of the voltage V1 is not limited as long as the discharge can be started. After the discharge is started by the application of the voltage V1, as shown in FIG. 3, the power source 40a to the power source 40e apply a rectangular pulse of the voltage V4 that can maintain the glow discharge to the counter electrode 31a to the counter electrode 31e, respectively. . Thereby, glow discharge can be maintained between each counter electrode and the ventilation electrode 32. The value of the voltage V4 may be set as appropriate so that glow discharge can be maintained, and is, for example, about 400V. Further, the width of the rectangular pulse of the voltage V4 is not particularly limited, but may be about 10 μsec, for example. In the example shown in FIG. 3, the voltage V1 and the voltage V4 are repeatedly applied to each counter electrode, but the number of times these voltages are applied is not particularly limited. For example, the number of times these voltages are applied may be one. In addition, when the voltage V1 and the voltage V4 are repeatedly applied to each counter electrode, a period in which the voltage application is stopped may be provided after the voltage V4 is applied until the voltage V1 is next applied. Such a voltage application stop period may be a time short enough to maintain discharge, and may be, for example, about several tens of microseconds.

  Next, the power supplies 40a to 40e apply voltage pulses for maintaining glow discharge to the counter electrodes 31a to 31e, respectively. As shown in FIG. 3, the power supply 40a to the power supply 40e apply a short pulse of the voltage V3 and a rectangular pulse of the voltage V4 to the counter electrode 31a to the counter electrode 31e, respectively. Thereby, glow discharge can be maintained between each counter electrode and the ventilation electrode 32. The value of the voltage V3 and the pulse width may be values that can start glow discharge, for example, about 2 kV and about 500 nsec. The pulse width of the voltage V4 is not particularly limited, but may be about 10 μsec, for example. Such voltage V3 and voltage V4 are repeatedly applied across the voltage application stop period. Thereby, glow discharge can be generated intermittently. The voltage application stop period may be a sufficiently short time so that discharge can be maintained, and may be, for example, about several tens of microseconds. The repetition frequency at which these voltages are applied is not particularly limited, but may be 20 kHz or more, which is the upper limit of the audible frequency band in order to mute. The period for generating the glow discharge is not particularly limited, but may be set to such a level that the ventilation electrode 32 and each counter electrode are not damaged by the heat generated by the glow discharge.

  During the period in which the glow discharge is occurring, the charged organic substance 91 located in the vicinity of the ventilation electrode 32 is completely oxidized. Thereby, the charged organic substance 91 can be substantially eliminated. Note that when the charged organic substance 91 is completely oxidized, the discharge state temporarily shifts to arc discharge as the resistance between the ventilation electrode 32 and each counter electrode decreases. In this way, the voltage applied to each power source is set as described above so as to return to glow discharge after the transition to arc discharge, and the current flowing between the vent electrode 32 and each counter electrode is limited. Also good. In order to limit the current, for example, a resistance element may be inserted in each discharge circuit.

  The voltages applied by the power source 40a to the power source 40e to the counter electrode 31a to the counter electrode 31e, respectively, during the discharge start period and the period for maintaining the glow discharge are discharge voltages.

  Next, the non-discharge voltage applied by the power source 40a to the power source 40e to the counter electrode 31a to the counter electrode 31e, respectively, following the discharge voltage will be described with reference to FIG.

  After the discharge voltage is applied, after the discharge is stopped, the power source 40a to the power source 40e apply a non-discharge voltage lower than the discharge start voltage to the counter electrode 31a to the counter electrode 31e, respectively. In the example shown in FIG. 3, the voltage V2 is applied as a non-discharge voltage. Thereby, although no discharge is generated, an electric field is generated between the ventilation electrode 32 and each counter electrode. By this electric field, it is possible to suppress the charged organic substance 91 from riding on the air flow (flow from right to left in FIG. 1) and detaching from the ventilation electrode 32. That is, in the discharge interruption period, the charged organic substance 91 can be adsorbed to the ventilation electrode 32 until the next discharge is started. Thus, the charged organic substance 91 adsorbed by the ventilation electrode 32 is completely oxidized by glow discharge generated by a discharge voltage applied subsequent to the non-discharge voltage. The value of the non-discharge voltage (voltage V <b> 2) is such that the distance between the air flow electrode 32 and each counter electrode and the flow of air are such that the discharge is not started and the charged organic matter 91 is adsorbed by the air flow electrode 32. What is necessary is just to set suitably according to speed etc. The value of the non-discharge voltage is, for example, about 9 kV.

  As described above, in the dust collector 10 according to the present embodiment, the discharge is intermittently generated by intermittently applying the discharge voltage to the counter electrode 31a to the counter electrode 31e. Therefore, the discharge is continuously generated. In some cases, the amount of heat generated can be reduced. Furthermore, the organic substance 90 introduced into the dust collector 10 is positively charged to form the charged organic substance 91, for example, so that the charged organic substance 91 is ventilated during a period in which a non-discharge voltage is applied to the counter electrode 31a to the counter electrode 31e. It can be adsorbed on the electrode 32. For this reason, it is possible to reduce the organic matter 90 discharged from the dust collector without being treated during the period when the discharge is stopped.

  In the operation example 1, the five power sources 40a to 40e are used. However, as described above, since the same voltage may be applied to each counter electrode, the voltage is applied to each counter electrode using one power source. You may apply.

[1-2-2. Operation example 2]
An operation example 2 of the dust collector 10 according to the present embodiment will be described. Operation example 2 is different from operation example 1 in that the timing of applying the discharge voltage and the non-discharge voltage applied to each counter electrode is different. Hereinafter, the operation example 2 will be described with reference to the drawings with a focus on differences from the operation example 1.

  FIG. 4 is a graph showing an example of a waveform of a voltage applied to each counter electrode of the dust collector 10 according to the present embodiment. In addition, in FIG. 4, the waveform of the voltage applied to the counter electrode 31a-counter electrode 31c among the counter electrode 31a-counter electrode 31e is shown by graph (a)-(c), respectively.

  As in the first operation example, the power source 40a alternately applies a discharge voltage and a non-discharge voltage to the counter electrode 31a. In the example shown in the graph (a) of FIG. 4, the power source 40a applies a discharge voltage from time T1 to time T2, and applies a non-discharge voltage after time T2. Similarly to the power source 40a, the power source 40b and the power source 40c alternately apply a discharge voltage and a non-discharge voltage to the counter electrode 31b and the counter electrode 31c, respectively. However, as shown in FIG. 4, the timing at which the power supply 40a to the power supply 40c apply the discharge voltage is different. In the example shown in FIG. 4, as shown in the graph (b), the power source 40b applies a discharge voltage from the time point T2 to the time point T3, and as shown in the graph (c), the power source 40c is set at the time point T3. Thereafter, a discharge voltage is applied. Although not shown in FIG. 4, similarly, the discharge voltage is applied to the power supply 40d and the power supply 40e at different timings. For example, the power supply 40a to the power supply 40e may apply a discharge voltage to the counter electrodes 31a to 31e sequentially. Thereby, since the timing and place where discharge is generated can be shifted, the timing and place where heat is generated can be dispersed. Furthermore, since the area | region where discharge has not generate | occur | produced among the ventilation electrodes 32 functions as a thermal radiation part, the temperature rise of the ventilation electrodes 32 can be suppressed. Therefore, adverse effects due to heat in the ventilation electrode 32 can be suppressed.

  As described above, when the discharge is sequentially started in each counter electrode, if the interval between the adjacent counter electrodes is narrow, the discharge generated in the adjacent counter electrode is used to determine the discharge start voltage. It may be possible to start the discharge by applying a low voltage. In this case, the applied voltage in the discharge start period of the discharge voltage may be appropriately adjusted to a value lower than the discharge start voltage.

[1-3. Summary]
As described above, the dust collector 10 according to the present embodiment includes the vent hole 32h that allows air to pass therethrough, the grounded vent electrode 32, and the counter electrode 31a to the counter electrode disposed to face the vent electrode 32. 31e. The dust collector 10 further includes a power source 40a to a power source that alternately applies a non-discharge voltage that does not cause dielectric breakdown of air between the ventilation electrode 32 and each counter electrode and a discharge voltage that causes dielectric breakdown of the air to each counter electrode. 40e.

  In this way, by intermittently applying the discharge voltage to the counter electrode 31a to the counter electrode 31e, the discharge is intermittently generated. Therefore, the amount of generated heat can be reduced as compared with the case where the discharge is continuously generated. Furthermore, the organic substance 90 introduced into the dust collector 10 is positively charged to form the charged organic substance 91, for example, so that the charged organic substance 91 is ventilated during a period in which a non-discharge voltage is applied to the counter electrode 31a to the counter electrode 31e. It can be adsorbed on the electrode 32. For this reason, it is possible to reduce the organic matter 90 discharged from the dust collector 10 without being treated during the period when the discharge is stopped.

  The dust collector 10 may include a plurality of counter electrodes 31a to 31e, and the power source 40a to power source 40e may sequentially apply a discharge voltage to the plurality of counter electrodes 31a to 31e.

  Thereby, since the timing and place where discharge is generated can be shifted, the timing and place where heat is generated can be dispersed. Furthermore, since the area | region where discharge has not generate | occur | produced among the ventilation electrodes 32 functions as a thermal radiation part, the temperature rise of the ventilation electrodes 32 can be suppressed. Therefore, adverse effects due to heat in the ventilation electrode 32 can be suppressed.

  Further, in the dust collector 10, the ventilation electrode 32 may have a mesh shape.

  As a result, it is possible to realize an electrode having high air permeability and easily adsorbing the organic matter 90.

  Further, in the dust collector 10, the counter electrode 31a to the counter electrode 31e may have a needle shape.

  Thereby, since an electric field can be concentrated in each counter electrode, discharge can be started at a lower voltage.

  Further, in the dust collector 10, glow discharge may be generated between the ventilation electrode 32 and each counter electrode by applying a discharge voltage to the counter electrode 31a to the counter electrode 31e.

  Thereby, the charged organic substance 91 in the discharge region can be instantaneously completely oxidized.

  In the dust collector 10, the air pressure may be atmospheric pressure.

  Thereby, since it can introduce into dust collector 10 without adjusting the pressure of air of atmospheric pressure, the composition of dust collector 10 can be simplified.

(Embodiment 2)
A dust collector according to Embodiment 2 will be described. The dust collector according to the present embodiment is different from the dust collector 10 according to Embodiment 1 in that a power source is shared between the charging unit and the processing unit. Hereinafter, the dust collector according to the present embodiment will be described focusing on differences from the dust collector 10 according to the first embodiment.

[2-1. overall structure]
The overall configuration of the dust collector according to the present embodiment will be described with reference to the drawings.

  FIG. 5 is a block diagram showing an outline of the overall configuration of the dust collector 110 according to the present embodiment.

  As shown in FIG. 5, the dust collector 110 according to the present embodiment includes a charging unit 120 and a processing unit 130 as in the dust collector 10 according to the first embodiment.

  The charging unit 120 is the same as the charging unit 20 according to the first embodiment in that it includes the ground electrode 22a and the ground electrode 22b, and the corona discharge electrode 21, but does not include the charging power source 25 and processes the power source 140. It is different in that it is shared with the unit 130.

  The processing unit 130 includes a ventilation electrode 32, a counter electrode 131 a to a counter electrode 131 e, and a power source 140. In the processing unit 130 according to the present embodiment, a voltage is applied to each counter electrode from one power supply 140, and each counter electrode is disposed on the charging unit 120 side with respect to the vent electrode 32. Is different. Further, as described above, the processing unit 130 shares the charging unit 120 and the power source 140. The power supply 140 applies a non-discharge voltage and a discharge voltage to each counter electrode and the corona discharge electrode 21. Thus, in this embodiment, it is not necessary to separately provide a power supply for charging in addition to the power supply 140, so that the configuration of the dust collector 110 can be simplified.

  As described above, in the present embodiment, the corona discharge electrode 21 is disposed so as to face the ground electrode 22a and the ground electrode 22b, and a non-discharge voltage is applied, whereby the corona discharge electrode 21 is connected to the ground electrode 22a and the ground electrode 22b. Corona discharge is generated between them. Here, in order to generate a corona discharge between the corona discharge electrode 21 and each ground electrode by applying a non-discharge voltage to the corona discharge electrode 21, the corona discharge electrode 21 and each of the corona discharge electrodes 21 according to the value of the non-discharge voltage. The distance from the ground electrode is set as appropriate.

  In addition, when a discharge voltage is applied to the corona discharge electrode 21, a period in which corona discharge does not occur temporarily may occur. However, normally, the period during which the discharge voltage is applied may be about 0.1% or more and less than 1% of the period during which the non-discharge voltage is applied. For this reason, the influence of the period during which the discharge voltage is applied on the organic matter processing performance of the dust collector 110 is small enough to be ignored.

[2-2. Summary]
As described above, the dust collector 110 according to the present embodiment includes the ground electrode 22a and the ground electrode 22b that are grounded. Further, the dust collector 110 is disposed opposite to the ground electrode 22a and the ground electrode 22b, and a corona discharge electrode 21 that generates a corona discharge between the ground electrode 22a and the ground electrode 22b when a non-discharge voltage is applied. Is provided. The power supply 140 applies a non-discharge voltage to the corona discharge electrode 21.

  Thereby, since it is not necessary to separately provide a power source for charging in addition to the power source 140, the configuration of the dust collector 110 can be simplified.

(Variations, etc.)
As mentioned above, although the dust collector which concerns on this invention was demonstrated based on each embodiment, this invention is not limited to said each embodiment.

  For example, one embodiment of the present invention can be realized as an air cleaner as shown in FIG. FIG. 6 is an external view of an air cleaner according to this modification. The air cleaner shown in FIG. 6 includes, for example, the dust collector according to each of the above embodiments, and extinguishes the organic matter 90 in the air. In such an air cleaner, the same effect as the dust collector according to each of the above embodiments is exhibited. Moreover, in such an air cleaner, it is not necessary to remove organic substances with a filter, so that the maintenance work of the filter can be reduced.

  One embodiment of the present invention can also be realized as an air conditioner as shown in FIG. FIG. 7 is an external view of an air conditioner according to this modification. The air conditioner shown in FIG. 7 includes, for example, the dust collector according to each of the above embodiments inside, and extinguishes organic substances in the air. In such an air conditioner, it is not necessary to remove organic substances with a filter, so that the maintenance work of the filter can be reduced.

  In each of the above embodiments, the vent electrode 32 has a mesh shape having a plurality of rectangular vent holes 32h. However, the vent electrode 32 only needs to have a vent hole. It is not limited to. For example, the ventilation electrode 32 may have a honeycomb shape, or may have a striped shape in which a plurality of linear electrodes are arranged in parallel.

  In the second embodiment, the non-discharge voltage and the discharge voltage are applied to the corona discharge electrode 21, but only the non-discharge voltage may be selectively applied.

  In the second embodiment, each counter electrode is arranged on the charging unit 120 side with respect to the ventilation electrode 32. However, the arrangement of each counter electrode is not limited to this. For example, each counter electrode may be arranged on the downstream side of the air (the left side in the horizontal direction in FIG. 5) with respect to the ventilation electrode 32 as in the first embodiment.

  In addition, the present invention can be realized by various combinations conceived by those skilled in the art for each embodiment, or by arbitrarily combining the components and functions in each embodiment without departing from the spirit of the present invention. This form is also included in the present invention.

10, 110 Dust collector 21 Corona discharge electrodes 22a, 22b Ground electrodes 31a, 31b, 31c, 31d, 31e, 131a, 131b, 131c, 131d, 131e Counter electrode 32 Ventilation electrode 32h Ventilation holes 40a, 40b, 40c, 40d, 40e, 140 Power supply

Claims (8)

A vent electrode having a vent hole for allowing air to pass through, and being grounded;
A counter electrode disposed to face the ventilation electrode;
A dust collector comprising: a non-discharge voltage that does not cause dielectric breakdown of air between the ventilation electrode and the counter electrode; and a power source that alternately applies a discharge voltage that causes dielectric breakdown of the air to the counter electrode. The dust collector includes a plurality of the counter electrodes,
The dust collector according to claim 1, wherein the power supply sequentially applies the discharge voltage to a plurality of the counter electrodes. The dust collector further includes:
A ground electrode to be grounded;
A corona discharge electrode that is disposed opposite to the ground electrode and generates a corona discharge with the ground electrode by applying the non-discharge voltage;
The dust collector according to claim 1, wherein the power source applies the non-discharge voltage to the corona discharge electrode. The dust collector according to claim 1, wherein the ventilation electrode has a mesh shape. The dust collector according to claim 1, wherein the counter electrode has a needle shape. The dust collector according to claim 1, wherein glow discharge is generated between the ventilation electrode and the counter electrode by applying the discharge voltage to the counter electrode. The dust collector according to claim 1, wherein the pressure of the air is atmospheric pressure. An air cleaner provided with the dust collector of any one of Claims 1-7.

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