JP2011067738A - Discharge device, and electrostatic atomizer equipped therewith - Google Patents

Abstract

Disclosed is a discharge device and an electrostatic atomization device that can be reduced in size and can generate discharge products efficiently and stably.
A discharge device that generates a discharge product includes a discharge electrode having a shape that becomes narrower in a direction in which the discharge product is diffused, a counter electrode that faces the discharge electrode, and electrodes. A power supply unit 21 that supplies power to apply a voltage therebetween and a piezoelectric vibrator 4 that boosts the voltage supplied from the power supply unit 21 by vibration are provided. The piezoelectric vibrator 4 includes input-side electrodes 42a and 42b to which electric power is input from the power supply unit 21, a piezoelectric body 41 that vibrates in accordance with a voltage applied to the input-side electrodes 42a and 42b, and input-side electrodes 42a and 42a. And an output-side electrode 43 that outputs electric power larger than the electric power input to 42b. The counter electrode 32 is connected to the output side electrode 43, and a voltage boosted by the piezoelectric vibrator 4 is applied between the electrodes 31 and 32.
[Selection] Figure 1

Description

  The present invention relates to a discharge device that generates a discharge product by generating a discharge between electrodes, and an electrostatic atomizer provided with the discharge device.

  As an electrostatic atomizer provided with a discharge device, there is known an apparatus that electrostatically atomizes water to generate charged fine particle mist containing nanometer-sized charged fine particles (for example, see Patent Document 1). Charged fine particle mist is attracting attention because of its high health and beauty effects.

  In general, as shown in FIG. 15, a discharge device 102 for generating discharge products such as charged fine particles includes a discharge unit 103 that generates ozone and charged fine particles by generating corona discharge between electrodes, A power supply unit 121 that supplies power to the discharge unit 103 is provided.

  The discharge part 103 is comprised by the discharge electrode 131 which has a shape which becomes thin as it goes in the direction which diffuses a discharge product, and the counter electrode 132 which opposes the discharge electrode 131. FIG. The discharge device 102 generates a discharge product by applying a voltage between the electrodes 131 and 132 using the power supplied from the power supply unit 121. In the discharge unit 103 having such a configuration, when charged fine particle mist containing charged fine particles is generated, water is supplied to the discharge electrode 131.

JP 2007-31460 A

  By the way, for the design convenience of the electrostatic atomizer, the conventional discharge device can only apply a voltage of about several kV between the electrodes, and may not generate the discharge product sufficiently. In such a case, it was necessary to use a high-voltage transformer having a winding and an iron core to boost the voltage.

  However, since a discharge device including a high voltage transformer including a winding and an iron core is a large device, there is a disadvantage that a space required for installing the discharge device and the electrostatic atomizer including the discharge device is increased. That is, there has been a problem that downsizing can be achieved and discharge products cannot be sufficiently generated.

  As a configuration for generating a high voltage between electrodes, a piezoelectric vibrator that boosts a voltage by vibration is known, and it is also possible to apply a high voltage between electrodes using such a piezoelectric vibrator. Although it is conceivable, since the piezoelectric vibrator generates mechanical vibration (ultrasonic vibration), there is a possibility that the discharge product cannot be stably generated due to the mechanical vibration.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a discharge device and an electrostatic atomization capable of achieving downsizing and generating a discharge product efficiently and stably. To provide an apparatus.

  The invention according to claim 1 is a discharge device that generates a discharge product by applying a voltage between the electrodes, the discharge electrode having a shape that becomes narrower toward a direction in which the discharge product is diffused, and a discharge A counter electrode that is opposed to the electrode with a gap, a power supply unit that supplies power to apply a voltage between the discharge electrode and the counter electrode, and a voltage supplied as power from the power supply unit is boosted by vibration The piezoelectric vibrator includes: an input side electrode to which power supplied from the power supply unit is input; a piezoelectric body that vibrates in accordance with a voltage applied to the input side electrode; An output side electrode that outputs electric power larger than the electric power input to the input side electrode in response to vibration, the counter electrode is connected to the output side electrode, and the piezoelectric vibrator is disposed between the discharge electrode and the counter electrode Boosted by Wherein the pressure is applied.

  According to the above configuration, since the piezoelectric vibrator that boosts the voltage supplied as power from the power supply unit by vibration is provided, a high-voltage transformer that requires a winding or an iron core to boost the voltage is unnecessary. A high voltage can be applied between the electrodes. Therefore, it is possible to reduce the size and to efficiently generate discharge products. Further, the counter electrode facing the discharge electrode is connected to the output side electrode of the piezoelectric vibrator that outputs power larger than the power input to the input side electrode of the piezoelectric vibrator, and the discharge electrode and the counter electrode are connected to each other. A voltage boosted by the piezoelectric vibrator is applied between them. For this reason, compared with the case where the discharge electrode having a shape that becomes narrower in the direction of diffusing the discharge product is connected to the output electrode of the piezoelectric vibrator, the discharge product caused by the vibration of the piezoelectric vibrator Unstable generation can be suppressed. Therefore, according to the present invention, it is possible to reduce the size and to generate discharge products efficiently and stably.

A second aspect of the present invention is the discharge device according to the first aspect, wherein the discharge apparatus includes a plurality of discharge electrodes.
According to the above configuration, since the discharge device includes a plurality of discharge electrodes, a large amount of discharge products can be generated as compared with a case where only one discharge electrode is provided.

The invention according to claim 3 is the discharge device according to claim 1 or 2, wherein the output-side electrode of the piezoelectric vibrator also serves as a counter electrode.
According to the above configuration, since the output-side electrode of the piezoelectric vibrator also serves as the counter electrode, the number of parts of the discharge device can be reduced as compared with the case where the counter electrode is configured separately from the piezoelectric vibrator. it can.

  Invention of Claim 4 was equipped with the discharge apparatus as described in any one of Claims 1-3, and the liquid supply means which supplies a liquid with respect to a discharge electrode, and was supplied with respect to the discharge electrode. The liquid is atomized by electric discharge.

  According to the said structure, the discharge apparatus as described in any one of Claims 1-3 and the liquid supply means which supplies a liquid with respect to a discharge electrode are provided, The liquid supplied with respect to the discharge electrode is used. Since it is atomized by electric discharge, charged fine particle mist can be generated.

  Invention of Claim 5 is an electrostatic atomizer of Claim 4, Comprising: As a liquid supply means, the discharge electrode is cooled, and the water | moisture content in air is condensed, and it is liquid with respect to a discharge electrode. A heat exchanger for supplying the heat.

  According to the above configuration, the discharge device stores the liquid as the liquid supply means because it includes the heat exchanger that cools the discharge electrode to condense moisture in the air and supplies the liquid to the discharge electrode. This eliminates the need for a tank and the trouble of supplying liquid to the tank.

Invention of Claim 6 is an electrostatic atomizer of Claim 4 or 5, Comprising: It is comprised so that switching is possible whether liquid is supplied with respect to a discharge electrode, It is characterized by the above-mentioned. To do.
According to the above configuration, since it is configured to be able to switch whether or not to supply liquid to the discharge electrode, the user of the electrostatic atomizer selects whether or not to generate charged fine particle mist. Can do.

  According to the present invention, downsizing can be achieved, and discharge products can be generated efficiently and stably.

The block diagram of the electrostatic atomizer which concerns on the 1st Embodiment of this invention. The perspective view which shows the discharge part provided with the discharge electrode and counter electrode which concern on the same embodiment. (A) Sectional drawing of the piezoelectric vibrator which concerns on the embodiment, (b) The perspective view of the piezoelectric vibrator which concerns on the embodiment. The block diagram of the electrostatic atomizer which concerns on the 2nd Embodiment of this invention. The perspective view which shows the discharge part provided with the some discharge electrode which concerns on the same embodiment. The block diagram of the electrostatic atomizer which concerns on the 3rd Embodiment of this invention. The perspective view which shows the discharge part provided with the discharge electrode and counter electrode which concern on the same embodiment. The block diagram of the electrostatic atomizer which concerns on the 4th Embodiment of this invention. The perspective view which shows the modification of a piezoelectric vibrator. (A)-(e) The perspective view which shows the modification of a counter electrode. (A) (b) The perspective view which shows the modification of a discharge electrode. (A)-(c) The perspective view which shows the modification of the discharge part provided with the some discharge electrode. The block diagram of the electrostatic atomizer which concerns on the modification of 3rd Embodiment. It is a perspective view of the discharge part which concerns on the modification, Comprising: The perspective view which shows the modification of a piezoelectric vibrator. The block diagram of the conventional electrostatic atomizer.

  Hereinafter, a plurality of embodiments embodying the present invention will be described with reference to the drawings. In addition, each figure is the schematic diagram which illustrated only the structure required in order to demonstrate the mechanism for generating a discharge product, and illustration and description are abbreviate | omitted about the other structure.

(First embodiment)
As shown in FIG. 1, the electrostatic atomizer 1 includes a discharge device 2 including a power supply unit 21 and a discharge unit 3, and a liquid supply device 5 that supplies water as a liquid to the discharge unit 3. And a control unit 9 that controls the discharge device 2 and the liquid supply device 5.

  The discharge device 2 includes a power supply unit 21 that supplies power to the discharge unit 3, a discharge unit 3 that generates a discharge product such as ozone and charged fine particles by generating a corona discharge between the electrodes, and a corona discharge. And a piezoelectric vibrator 4 for increasing a voltage applied between the electrodes.

  The power supply unit 21 is a power supply circuit that supplies an AC voltage obtained from a commercial power supply as power. Since the power supply unit 21 supplies an AC voltage to the discharge unit 3 via the piezoelectric vibrator 4, the AC voltage that has become a high voltage by the piezoelectric vibrator 4 is supplied to the discharge unit 3.

  As shown in FIGS. 1 and 2, the discharge unit 3 includes a discharge electrode 31 connected to the ground that is a reference potential point, and a counter electrode 32 provided to face the discharge electrode 31 with a space therebetween. ing. When a high voltage is applied between the discharge electrode 31 and the counter electrode 32, corona discharge is generated between the electrodes 31 and 32.

  The discharge electrode 31 is an electrode having a shape that becomes narrower in the direction in which the discharge product is diffused (the direction indicated by the arrow A in the figure). In the present embodiment, the tip of the discharge electrode 31 has a sharp protrusion and is provided on a ground wiring 31a formed on a substrate (not shown).

  The counter electrode 32 is an electrode for generating discharge in the space between the discharge electrode 31. Directivity can be given in the direction in which the discharge product is diffused by the location of the counter electrode 32 with respect to the discharge electrode 31. In the present embodiment, the counter electrode 32 is formed in an annular shape in order to reduce the influence on the diffusion of the discharge product. The counter electrode 32 is connected to the piezoelectric vibrator 4 whose potential is higher than the reference potential point.

  When no liquid is supplied from the liquid supply device 5 to the discharge unit 3 configured as described above, that is, when no liquid is supplied to the discharge electrode 31, the activity of ozone, which is a discharge product, during corona discharge Material is generated. Therefore, the electrostatic atomizer 1 generates the discharge product from which the sterilization and the deodorizing effect are acquired by applying a voltage between the electrodes 31 and 32, without using a liquid.

  On the other hand, when a liquid is supplied to the discharge unit 3 from the liquid supply device 5, that is, when a liquid is supplied to the discharge electrode 31, the liquid is charged at the time of discharge, and a Coulomb force acts on the charged liquid. To do. Then, the liquid is supplied to the tip of the discharge electrode 31, and the surface of the liquid becomes a tailor cone having a pointed shape in the direction indicated by the arrow A, and electric charges concentrate on the tip of the tailor cone. When the charge concentrates on the tip of the tailor cone and becomes high density, electrostatic atomization is performed by repeatedly dividing and scattering (Rayleigh splitting) of the liquid due to the repulsive force of the charge. Then, charged fine particle mist having radicals and containing nanometer-sized charged fine particles is generated by electrolysis. Therefore, the electrostatic atomizer 1 generates charged fine particles, which are discharge products, by applying a voltage between the electrodes 31 and 32 using a liquid, thereby producing a charged fine particle mist that can provide health and beauty effects. generate.

  In the present embodiment, the electrostatic atomizer 1 is configured to be able to switch whether or not to supply liquid to the discharge electrode 31. Specifically, while the control unit 9 performs control to supply power to the power supply unit 21, the control unit 9 can perform control to drive the electric pump 52 constituting the liquid supply device 5 and control to stop the drive. It is configured as follows.

  In the present embodiment, the contact member 22 is fixed to the counter electrode 32 of the discharge unit 3 that generates discharge, and the counter electrode 32 is electrically connected to the piezoelectric vibrator 4 via the contact member 22. . The contact member 22 is formed of an elastic metal material, and the contact member 22 suppresses transmission of mechanical vibration generated in the piezoelectric vibrator 4 to the counter electrode 32. Therefore, in the present embodiment, the counter electrode 32 and the piezoelectric vibrator 4 are supported by separate support members. Further, from the viewpoint of more reliably suppressing the transmission of mechanical vibration, the contact between the contact member 22 and the piezoelectric vibrator 4 is preferably a point contact.

  As shown in FIGS. 1 and 3, the piezoelectric vibrator 4 includes a piezoelectric body 41, input side electrodes 42 a and 42 b to which power supplied from the power supply unit 21 is input, and vibration of the piezoelectric body 41. The piezoelectric transformer includes an output side electrode 43 that outputs electric power larger than electric power input to the input side electrodes 42a and 42b. In the present embodiment, the plate-like piezoelectric vibrator 4 is formed to have a rectangular shape in plan view, and the thickness direction of the piezoelectric vibrator 4 (the direction indicated by the arrow X in the drawing) and the length direction. The dimensional ratio in the direction indicated by the arrow Y in the figure corresponds to the approximate amplification ratio between the input voltage and the output voltage. In the present embodiment, the dimension in the longitudinal direction Y of the piezoelectric vibrator 4 is set to 10 to 20 times the dimension in the thickness direction X of the piezoelectric vibrator 4. The length direction Y of the piezoelectric vibrator 4 is a direction perpendicular to the thickness direction X of the piezoelectric vibrator 4. In the present embodiment, the length direction Y of the piezoelectric vibrator 4 is the longitudinal direction of the piezoelectric vibrator 4. Direction.

  The piezoelectric body 41 is made of a lead zirconate titanate (PZT) material, and is formed in a rectangular plate shape in the present embodiment. The piezoelectric body 41 vibrates according to the voltage applied to the input side electrodes 42a and 42b.

  The input side electrodes 42 a and 42 b are electrodes provided on both sides of the piezoelectric body 41 in the thickness direction X on the one end 41 a side in the length direction Y of the piezoelectric vibrator 4. That is, the input side electrode 42 a is provided on one surface in the thickness direction X of the piezoelectric body 41, and the input side electrode 42 b is provided on the other surface in the thickness direction X of the piezoelectric body 41. An AC voltage supplied from the power supply unit 21 is applied between the input side electrodes 42a and 42b.

  The output-side electrode 43 is an electrode provided on the other end 41 b side in the length direction Y of the piezoelectric body 41 and on the end face facing the length direction Y. The output side electrode 43 is connected to the counter electrode 32 via the contact member 22 described above, and a high voltage generated in the output side electrode 43 is applied between the counter electrode 32 and the discharge electrode 31. It is configured. The output side electrode 43 is coated with a gold plating or the like made of an acid resistant material to improve the durability of the output side electrode 43 against acid, high voltage, and strong mechanical vibration.

  As described above, the piezoelectric vibrator 4 is polarized in a plurality of directions, has at least one electrode as a power supply surface, and further has at least one electrode as a high voltage output surface. That is, in the present embodiment, the input side electrodes 42 a and 42 b constitute the power supply surface of the piezoelectric vibrator 4, and the output side electrode 43 constitutes the high voltage output surface of the piezoelectric vibrator 4.

  As shown in FIG. 1, an AC voltage having a resonance frequency corresponding to the dimension in the longitudinal direction Y of the piezoelectric vibrator 4 is applied to the input-side electrodes 42 a and 42 b electrically connected to the power supply unit 21. It is configured as follows. Based on the application of the AC voltage, strong mechanical vibration (ultrasonic vibration) is generated in the longitudinal direction Y of the piezoelectric vibrator 4, and the length direction of the piezoelectric vibrator 4 is indicated by a two-dot chain line in the figure. A standing wave W1 having a half-wavelength (λ / 2) of Y is generated. The standing wave W1 is a longitudinal wave vibration, but for the sake of convenience, it is shown as a transverse wave in the drawing. By this mechanical vibration, the voltage applied from the power supply unit 21 to the input side electrodes 42 a and 42 b is boosted, and a high voltage is generated at the output side electrode 43.

  Therefore, the power supply unit 21 supplies power to apply a voltage between the discharge electrode 31 and the counter electrode 32, and the piezoelectric vibrator 4 vibrates the voltage supplied as power from the power supply unit 21. It is configured to boost the voltage. In this way, a high voltage boosted by the piezoelectric vibrator 4 is applied between the discharge electrode 31 and the counter electrode 32.

  Further, the piezoelectric vibrator 4 configured as described above is sandwiched and supported by a holding member 23 as a supporting member provided in the discharge device 2. In the present embodiment, the holding member 23 is provided at the position where the standing wave W1 of the piezoelectric vibrator 4 becomes the node F1 so as to sandwich the piezoelectric vibrator 4 in the thickness direction X.

  The liquid supply device 5 supplies the discharge electrode 31 with water, which is a liquid stored in the tank 51 through a liquid supply path 53, and a tank 51 as a liquid storage section detachably provided in a tank holder (not shown). The electric pump 52 is provided. That is, the liquid supply device 5 as a liquid supply means supplies water to the discharge electrode 31 of the discharge unit 3.

  The control unit 9 is an integrated circuit such as a microcomputer configured to supply power from the power supply unit 21 to the discharge unit 3 in accordance with a user operation. Moreover, the control part 9 is comprised so that control which drives the electric pump 52 and control which stops the said drive as mentioned above according to a user's operation can be performed.

According to this embodiment, the following effects can be obtained.
(1) Since the discharge device 2 includes the piezoelectric vibrator 4 that boosts the voltage supplied as power from the power supply unit 21 by vibration, a high-voltage transformer that requires a winding or an iron core is not required to boost the voltage. However, a high voltage can be applied between the discharge electrode 31 and the counter electrode 32. Therefore, it is possible to reduce the size and to efficiently generate discharge products.

  (2) The counter electrode 32 facing the discharge electrode 31 is connected to the output-side electrode 43 of the piezoelectric vibrator 4 that outputs a larger electric power than the power inputted to the input-side electrode of the piezoelectric vibrator 4, and the discharge is performed. A voltage boosted by the piezoelectric vibrator 4 is applied between the electrode 31 and the counter electrode 32. For this reason, compared with the case where the discharge electrode 31 having a shape that becomes narrower in the direction in which the discharge product is diffused is connected to the output-side electrode 43 of the piezoelectric vibrator 4, the discharge caused by the vibration of the piezoelectric vibrator 4. Unstable generation of the product can be suppressed. Therefore, due to the effects of (1) and (2), it is possible to reduce the size and to generate discharge products efficiently and stably.

  (3) The electrostatic atomizer 1 includes the discharge device 2 and liquid supply means for supplying a liquid to the discharge electrode 31, and atomizes the liquid supplied to the discharge electrode 31 by discharge. . For this reason, charged fine particle mist can be generated.

  (4) Whether or not to supply liquid to the discharge electrode 31 can be switched. For this reason, the user of the electrostatic atomizer 1 can select whether or not to generate charged fine particle mist.

  (5) Since the counter electrode 32 and the output side electrode 43 are electrically connected by the contact member 22 having elasticity, transmission of mechanical vibration generated in the piezoelectric vibrator 4 can be suppressed.

  (6) The holding member 23 that sandwiches the piezoelectric vibrator 4 is provided at a position that becomes the node F1 of the standing wave W1 that is generated in the piezoelectric vibrator 4 due to the application of the AC voltage. For this reason, breakage of the piezoelectric vibrator 4 can be avoided.

(Second Embodiment)
Next, a second embodiment in which the configuration of the discharge unit 3 in the first embodiment is changed will be described. In addition, about the component similar to the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted or simplified. The liquid supply means and the control unit 9 are not shown.

  As shown in FIGS. 4 and 5, the present embodiment is characterized in that the discharge device 2 includes a plurality of discharge electrodes 31. Specifically, as shown in FIG. 5, in this embodiment, a plurality of discharge electrodes 31 are provided on a ground wiring 31 a formed on a substrate (not shown). The tip is facing the same direction. Therefore, in the present embodiment, a plurality of discharge electrodes 31 are provided for one counter electrode 32.

According to the present embodiment, in addition to the operational effects described in the first embodiment, the following operational effects can be obtained.
(7) Since the discharge device 2 includes a plurality of discharge electrodes 31, a larger amount of discharge products can be generated than when only one discharge electrode 31 is provided.

(Third embodiment)
Next, a third embodiment in which the output-side electrode 43 of the piezoelectric vibrator 4 is configured as the counter electrode 32 will be described. In addition, about the component similar to the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted or simplified. The liquid supply means and the control unit 9 are not shown.

  As shown in FIG. 6, the present embodiment is characterized in that the output-side electrode 43 of the piezoelectric vibrator 4 also serves as a counter electrode. That is, in the present embodiment, the discharge portion 3 is configured by the discharge electrode 31 and the output side electrode 43 without using the counter electrode 32 formed separately from the output side electrode 43 in the first embodiment. ing.

  As shown in FIG. 7, the other end portion 41b of the piezoelectric body 41 according to the present embodiment is formed with a notch so as to form a circle. An output-side electrode 43 is provided on the end surface on the other end 41 b side of the piezoelectric body 41 including the end surface of the notch formed in this way. The discharge electrode 31 is provided toward the notch formed in the other end 41 b of the piezoelectric body 41.

According to the present embodiment, in addition to the operational effects described in the first embodiment, the following operational effects can be obtained.
(8) Since the output-side electrode 43 of the piezoelectric vibrator 4 also serves as a counter electrode, the number of parts of the discharge device 2 can be reduced as compared with the case where the counter electrode is configured separately from the piezoelectric vibrator 4. Can do. As a result, downsizing and cost reduction can be achieved.

(Fourth embodiment)
Next, a description will be given of a fourth embodiment in which a Peltier unit 6 that is a heat exchanger is used instead of the liquid supply device 5 as a liquid supply unit that supplies a liquid to the discharge unit 3. In addition, about the component similar to the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted or simplified.

  As shown in FIG. 8, in this embodiment, the electrostatic atomizer 1 includes a Peltier unit 6 having a Peltier element 6A, a heat exchanger power supply unit 71 that supplies power to the Peltier unit 6, and a Peltier unit. 6 is provided with a mechanical switch 72 provided in wiring for supplying electric power to 6.

  The Peltier unit 6 is a small heat exchanger provided with a Peltier element 6A and heat radiation fins 64 provided on the heat radiation side substrate 61 constituting the Peltier element 6A. The Peltier element 6A includes a heat dissipation side substrate 61 provided with a heat dissipation side electrode, a heat absorption side substrate 62 provided with a heat absorption side electrode, P-type and N-type thermoelectric semiconductors connecting the heat dissipation side electrode and the heat absorption side electrode, It is comprised by.

  The heat dissipating side substrate 61 and the heat absorbing side substrate 62 provided with the electrodes have insulation and thermal conductivity, and the heat dissipating side electrode, the N-type thermoelectric semiconductor, the heat absorbing side electrode, and the P type thermoelectric semiconductor are arranged in series in this order. When a direct current is supplied as power from the heat exchanger power supply unit 71 included in the electrostatic atomizer 1 to the circuit connected to the heat atomization apparatus 1, heat conduction from the heat absorption side substrate 62 to the heat dissipation side substrate 61 occurs. . Therefore, the discharge electrode 31 provided on the heat absorption side substrate 62 is configured to be cooled, and the Peltier unit 6 condenses moisture in the air by cooling the discharge electrode 31 to the discharge electrode 31. Liquid supply means for supplying the liquid. The heat conducted from the heat absorption side substrate 62 to the heat radiation side substrate 61 is efficiently radiated by the heat radiation fins 64.

  The heat exchanger power supply unit 71 is a power supply circuit that supplies a direct current as power to the Peltier element 6A. In the present embodiment, the electrostatic atomizer 1 is configured to be able to switch whether or not to supply liquid to the discharge electrode 31 by operating the switch 72. In other words, by operating the switch 72, the Peltier element 6A can be supplied with electric power and can be stopped.

According to the present embodiment, in addition to the operational effects described in the first embodiment, the following operational effects can be obtained.
(9) Since the discharge device 2 includes the Peltier unit 6 that condenses moisture in the air by cooling the discharge electrode 31 and supplies the liquid to the discharge electrode 31 as a liquid supply means, the liquid is stored. The tank 51 and the trouble of supplying liquid to the tank 51 can be dispensed with.

  In addition, this invention is not limited to the said embodiment, A various design change is possible based on the meaning of this invention, and they are not excluded from the scope of the present invention. For example, the above embodiment may be changed as follows, and the following changes and the above embodiments may be combined.

  As shown in FIG. 9, the side surfaces 41 c and 41 d in the longitudinal direction Y of the piezoelectric vibrator 4 are formed so as to approach each other from the node F <b> 1 of the standing wave W <b> 1 to the output side electrode 43. The piezoelectric vibrator 4 may be formed so as to become thinner toward the head. That is, the width H1 of the piezoelectric vibrator 4 on the other end 41b side may be configured to be shorter than the width H2 of the piezoelectric vibrator 4 at the node F1 of the standing wave W1. With this configuration, since the cross-sectional area of the piezoelectric vibrator 4 decreases toward the output side electrode 43 side, a high voltage can be efficiently generated in the output side electrode 43.

The counter electrode 32 may be constituted by a mesh electrode (not shown) in which a plurality of holes are formed. Further, the shape, number and arrangement of the counter electrodes 32 may be changed as appropriate.
Specifically, as shown in FIG. 10A, the counter electrode 32 may be plate-shaped or rectangular. Moreover, as shown in FIG.10 (b), the counter electrode 32 may be rod-shaped. Further, as shown in FIG. 10C, the counter electrode 32 may be a dome-shaped electrode having a hemispherical shape covering the tip of the discharge electrode 31 and having a through hole 32a formed at the center thereof. Further, as shown in FIG. 10D, a plurality of counter electrodes 32 may be provided for one discharge electrode 31, and the plurality of counter electrodes 32 may have different shapes. Good. Further, as shown in FIG. 10E, the counter electrode 32 may be arranged so that the discharge electrode 31 is provided inside the counter electrode 32 formed in an annular shape.

  -You may change the shape of the discharge electrode 31 suitably. Specifically, as shown in FIG. 11A, the tip of the discharge electrode 31 may be formed in a spherical shape. If comprised in this way, the quantity of the liquid hold | maintained by surface tension in the front-end | tip of the discharge electrode 31 can be increased, and the quantity of charged fine particle mist can be increased. Moreover, as shown in FIG.11 (b), you may form the front-end | tip of the discharge electrode 31 in planar shape from a viewpoint of suppressing deterioration of the discharge electrode 31 by the application of a high voltage. In addition, the shapes and the like of the plurality of discharge electrodes 31 may be different. Specifically, as shown in FIG. 12A, the tips of the plurality of discharge electrodes 31 may face different directions. Moreover, as shown in FIG.12 (b), the length of the some discharge electrode 31 may differ. Moreover, as shown in FIG.12 (c), the shape of the front-end | tip of the several discharge electrode 31 may differ.

  The piezoelectric vibrator 4 does not have to be rectangular. For example, as shown in FIGS. 13 and 14, the piezoelectric vibrator 4 may be formed in an annular shape. When configured in this way, the length direction Y of the piezoelectric vibrator 4 is set to a direction parallel to the center line C of the annular piezoelectric vibrator 4 so that the thickness direction X of the piezoelectric vibrator 4 and the length of the piezoelectric vibrator 4 are longer. The dimensional ratio in the vertical direction Y can correspond to the approximate amplification ratio of the input voltage and the output voltage.

  That is, when the piezoelectric vibrator 4 is configured in an annular shape, the input-side electrodes 42 a and 42 b are on one end 41 a side in the longitudinal direction Y of the piezoelectric body 41 and in the thickness direction X of the piezoelectric body 41. It is an electrode provided on the inner peripheral surface and the outer peripheral surface. When configured in this manner, the annular output-side electrode 43 provided on the end surface facing the length direction Y on the other end 41b side in the length direction Y of the piezoelectric body 41 is shown in FIGS. As shown in FIG. 14, an electrode for generating discharge in a space between the discharge electrode 31 may be used. That is, as in the third embodiment, the output electrode 43 of the piezoelectric vibrator 4 also serves as a counter electrode, so that the counter electrode 32 formed separately from the output electrode 43 in the first embodiment. The discharge part 3 may be constituted by the discharge electrode 31 and the output side electrode 43 without using the above.

  A configuration in which the counter electrode 32 is connected to the piezoelectric vibrator 4 without using the contact member 22 may be employed. That is, the counter electrode 32 may be connected to the output side electrode 43 regardless of whether or not the contact member 22 is interposed therebetween.

  DESCRIPTION OF SYMBOLS 1 ... Electrostatic atomizer, 2 ... Discharge device, 3 ... Discharge part, 4 ... Piezoelectric vibrator, 5 ... Liquid supply device, 6 ... Peltier unit, 6A ... Peltier element, 9 ... Control apparatus, 21 ... Power supply part , 22 ... contact member, 23 ... holding member, 31 ... discharge electrode, 32 ... counter electrode, 41 ... piezoelectric body, 42a, 42b ... input side electrode, 43 ... output side electrode, 51 ... tank, 52 ... electric pump, 53 DESCRIPTION OF SYMBOLS ... Liquid supply path, 61 ... Radiation side board | substrate, 62 ... Heat absorption side board | substrate, 64 ... Radiation fin, 71 ... Power supply part for heat exchangers, 72 ... Switch.

Claims (6)

A discharge device that generates a discharge product by applying a voltage between electrodes,
A discharge electrode having a shape that narrows toward the direction of diffusing the discharge product;
A counter electrode facing the discharge electrode with a gap therebetween;
A power supply unit for supplying power to apply a voltage between the discharge electrode and the counter electrode;
A piezoelectric vibrator that boosts the voltage supplied as power from the power supply unit by vibration;
The piezoelectric vibrator includes an input-side electrode to which power supplied from the power supply unit is input, a piezoelectric body that vibrates according to a voltage applied to the input-side electrode, and a vibration according to the vibration of the piezoelectric body. An output side electrode that outputs a power larger than the power input to the input side electrode;
The discharge device, wherein the counter electrode is connected to the output electrode, and a voltage boosted by the piezoelectric vibrator is applied between the discharge electrode and the counter electrode.   The discharge device according to claim 1, comprising a plurality of the discharge electrodes.   The discharge device according to claim 1, wherein the output-side electrode of the piezoelectric vibrator also serves as the counter electrode.   A discharge device according to any one of claims 1 to 3 and liquid supply means for supplying a liquid to the discharge electrode, wherein the liquid supplied to the discharge electrode is atomized by discharge. An electrostatic atomizer characterized in that   5. The electrostatic apparatus according to claim 4, wherein the liquid supply means includes a heat exchanger that condenses moisture in the air by cooling the discharge electrode and supplies the liquid to the discharge electrode. Atomization device.   6. The electrostatic atomizer according to claim 4, wherein the electrostatic atomizer is configured to be able to switch whether or not to supply liquid to the discharge electrode.

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