JP5432792B2 - Electrostatic atomizer - Google Patents

Description

  The present invention relates to an electrostatic atomizer.

  Conventionally, it has been known to generate nanometer-sized charged fine particle water by supplying water to the tip of the discharge electrode and applying a high voltage between the discharge electrode and the counter electrode.

  In addition, Patent Document 1 discloses that an electrostatic atomization unit including a discharge electrode and a counter electrode is connected in parallel to a single high-voltage power source in order to generate a large amount of charged fine particle water.

JP 2006-334503 A

  However, in the conventional example disclosed in Patent Document 1, due to the difference in distance between the discharge electrode and the counter electrode, a large amount of discharge current flows closer to the distance, and electrostatic atomization is easily started earlier. When electrostatic atomization is started at the discharge electrode that is more likely to be started, the water supplied to the tip of the discharge electrode is pulled by the Coulomb force and formed as a Taylor cone toward the counter electrode, and more. The distance to the counter electrode is shortened, and a large amount of discharge current flows through the discharge electrode.

  In this way, only one of the plurality of electrostatic atomizers that is likely to start electrostatic atomization earlier is subjected to electrostatic atomization, and other electrostatic atomizers do not perform much electrostatic atomization. As a result, there is a problem that a large increase in the amount of electrostatic atomization cannot be achieved despite the provision of a plurality of electrostatic atomization units.

  Further, in the conventional example shown in Patent Document 1, a resistance is connected in series to a plurality of atomizing electrodes connected in parallel to a high-voltage power source, and an interelectrode voltage between the atomizing electrode and the counter electrode is set. It is trying to unify the discharge state in each electrostatic atomization part by adjusting. However, it is difficult to adjust a plurality of resistances, and in particular, the formation of the Taylor cone varies, and it is difficult to set the amount of electrostatic atomization in each discharge part to a target amount. It is hard to say that the increase in the amount of atomization can be fully demonstrated.

  It is invented in view of the problems of the conventional example of the present invention, and is to provide an electrostatic atomizing device capable of increasing the amount of electrostatic atomization.

  The electrostatic atomizer of the present invention includes a first discharge electrode connected to either the lower potential side or the higher potential side than the reference potential of the high-voltage power supply, and a first counter electrode facing the first discharge electrode. A second discharge electrode connected to the first counter electrode, and a second counter electrode facing the second discharge electrode and connected to either the lower potential side or the higher potential side of the reference potential of the high-voltage power source And a liquid supply means for connecting the first counter electrode and the second discharge electrode to a reference potential point of the high-voltage power source and supplying a liquid to the first discharge electrode and the second discharge electrode. It is characterized by that.

  Here, it is preferable that the potential difference between the first discharge electrode and the first counter electrode and the potential difference between the second discharge electrode and the second counter electrode are the same.

  It is also preferable that the potential difference between the first discharge electrode and the first counter electrode is different from the potential difference between the second discharge electrode and the second counter electrode.

  In the present invention, since the first counter electrode and the second discharge electrode are connected to the reference potential point of the high-voltage power source and the liquid supply means for supplying the liquid to the first discharge electrode and the second discharge electrode is provided, the first discharge The potential difference between the electrode and the first counter electrode and the potential difference between the second discharge electrode and the second counter electrode can be fixed potential differences. Thereby, the electrostatic atomization performed between the 1st discharge electrode and the 1st counter electrode and the electrostatic atomization performed between the 2nd discharge electrode and the 2nd counter electrode can be performed stably, respectively. And the amount of electrostatic atomization can be increased.

It is a schematic block diagram of the electrostatic atomizer of this invention.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  The electrostatic atomizer includes two electrostatic atomizers 7a and 7b. One electrostatic atomizing portion 7 a is composed of a first discharge electrode 2 and a counter electrode 3 facing the first discharge electrode 2. The other electrostatic atomizing portion 7 b includes a second discharge electrode 4 and a second counter electrode 5 that faces the second discharge electrode 4.

  The first discharge electrode 2 is connected to either the lower potential side or the higher potential side than the reference potential of the high-voltage power supply 1. In addition, the first counter electrode 3 and the second discharge electrode 4 are connected, and the second counter electrode 5 is connected to either the lower potential side or the higher potential side than the reference potential of the high-voltage power supply 1.

  Further, the middle of the circuit connecting the first counter electrode 3 and the second discharge electrode 4 is connected to the reference potential point of the high-voltage power supply 1.

  Liquid is supplied to the first discharge electrode 2 and the second discharge electrode 4 by the liquid supply means 6. Then, by applying a high voltage from the high-voltage power source 1 between the first discharge electrode 2 and the first counter electrode 3 and between the second discharge electrode 4 and the second counter electrode 5, The liquid supplied to the tip portion is electrostatically atomized and the liquid supplied to the tip portion of the second discharge electrode 4 is electrostatically atomized.

  In the embodiment shown in FIG. 1, the first discharge electrode 2 is connected to the negative electrode on the lower potential side than the reference potential of the high-voltage power supply 1 (in the embodiment, the reference potential is 0 V), and the positive electrode of the high-voltage power supply 1 is second-opposed. The electrode 5 is connected. In the embodiment shown in FIG. 1, the potential difference V1 between the first discharge electrode 2 and the first counter electrode 3 and the potential difference V2 between the second discharge electrode 4 and the second counter electrode 5 are set to be the same. .

  As the liquid supplied by the liquid supply means 6, water, an aqueous solution in which an active ingredient is mixed in water, or a liquid other than water can be employed.

  In order to supply the liquid to the distal end portion of the first discharge electrode 2 and the distal end portion of the second discharge electrode 4, the liquid stored in the liquid reservoir portion is supplied using a capillary phenomenon, or the liquid is supplied by pressurization. The first discharge electrode 2 by supplying liquid by flowing or dropping using gravity, or by generating moisture by cooling water in the air by a cooling means such as the Peltier unit 6a. The liquid (water) is supplied to the second discharge electrode 4.

  In the embodiment shown in FIG. 1, the liquid supply means 6 for supplying liquid to the first discharge electrode 2 and the second discharge electrode 4 is constituted by a cooling means. Hereinafter, the liquid supplied to the first discharge electrode 2 and the second discharge electrode 4 will be described as water.

  In the Peltier unit 6a, a pair of Peltier circuit boards are opposed to each other so that their circuits face each other, and many rows of thermoelectric elements are sandwiched between the two Peltier circuit boards, and adjacent thermoelectric elements are connected by circuits on both sides. Electrically connected. When the thermoelectric element is energized, heat is transferred from one Peltier circuit board side toward the other Peltier circuit board side.

  A cooling unit 9 is connected to the outside of the Peltier circuit board on one side. Moreover, the heat radiating part 10 is connected to the outside of the Peltier circuit board on the other side, and in the embodiment, an example of a heat radiating fin is shown as the heat radiating part 10.

  By energizing the Peltier unit 6a, the first discharge electrode 2 and the second discharge electrode 4 are cooled, and moisture in the air is generated in the first discharge electrode 2 and the second discharge electrode 4 as condensed water. To supply.

  In the embodiment shown in FIG. 1, the Peltier unit 6 a that cools the first discharge electrode 2 and the second discharge electrode 4 is shown as a separate example, but the first Peltier unit 6 a includes a first cooling unit 9. The discharge electrode 2 and the second discharge electrode 4 may be connected. In this case, one Peltier unit 6a is sufficient, which contributes to downsizing of the electrostatic atomizer.

  When the electrostatic atomizer is operated, the Peltier unit 6a is energized to cool the cooling unit 9, and the cooling unit 9 is cooled to cool the first discharge electrode 2 and the second discharge electrode 4, respectively. The water is condensed to supply water (condensed water) to the tip of the first discharge electrode 2 and the tip of the second discharge electrode 4.

  Thus, in a state where water is supplied to the tip of the first discharge electrode 2 and water is supplied to the tip of the second discharge electrode 4, the first discharge electrode 2, the first counter electrode 3, and the second A high voltage is applied between the discharge electrode 4 and the second counter electrode 5. When a high voltage is applied, the level of the water supplied to the tip portions of the first discharge electrode 2 and the second discharge electrode 4 is locally raised in a cone shape (Taylor cone), and the first discharge electrode is formed. 2. Electrostatic atomization is performed at each tip of the second discharge electrode 4.

  The Taylor cone is formed and electrostatic atomization is performed for the following reason.

  That is, when a Taylor cone is formed at each tip of the first discharge electrode 2 and the second discharge electrode 4, electric charges concentrate on the tip of the Taylor cone, and the electric field strength at this portion increases. Grow Taylor corn. When the Taylor cone grows and the charge concentrates at the tip of the Taylor cone and the charge density becomes high, the water at the tip of the Taylor cone has a large energy (the repulsive force of the high density charge). Receive. Thus, when the water at the tip of the Taylor cone receives a large amount of energy, a large amount of nanometer-sized charged fine particle water that is negatively charged by repeating splitting and scattering (Rayleigh splitting) exceeding the surface tension is generated.

  Thus, the nanometer-sized charged fine particle water generated by electrostatic atomization of the water supplied to the tip portions of the first discharge electrode 2 and the second discharge electrode 4 includes superoxide radicals and hydroxy radicals. Includes radicals. Therefore, by releasing nanometer-sized charged fine particle water into the discharge target space, deodorization, sterilization, and allergen substance inactivation in the discharge target space by radicals such as superoxide radicals and hydroxy radicals contained in the charged fine particle water Can be made.

  Here, in the embodiment of FIG. 1, the first discharge electrode 2 is connected to the negative electrode on the lower potential side than the reference potential of the high-voltage power supply 1, the second counter electrode 5 is connected to the positive electrode on the high potential side, Since the potential difference V1 between the first discharge electrode 2 and the first counter electrode 3 and the potential difference V2 between the second discharge electrode 4 and the second counter electrode 5 are set to be the same, V1 = V2 and V1 and V2 are set. Fixed to a value. Therefore, the discharge amount in the two electrostatic atomizing portions 7a and 7b can be made the same, the electrostatic atomization amount is stable, and the two electrostatic atomizing portions 7a and 7b have substantially the same particle diameters that are negatively charged. Nanometer-sized charged fine particle water can be stably generated in large quantities. For example, the two electrostatic atomizers 7a and 7b can stably generate a large amount of charged fine particle water having an average particle diameter of 10 to 30 nanometers.

  Next, another embodiment is shown.

  In the present embodiment, the potential difference V1 between the first discharge electrode 2 and the first counter electrode 3 and the potential difference V2 between the second discharge electrode 4 and the second counter electrode 5 are set to be different.

  That is, V1 ≠ V2 and V1 and V2 are fixed to set values. Therefore, the discharge amount of the one electrostatic atomizer 7a becomes the set discharge amount, and electrostatic atomization is performed stably. Further, the other electrostatic atomizing portion 7b also has a different discharge amount different from the discharge amount of the electrostatic atomizing portion 7a, and the electrostatic atomization is stably performed.

  Here, the amount of water supplied to each of the first discharge electrode 2 and the second discharge electrode 4 and the electrostatic atomization amount of one electrostatic atomization unit 7a can be set by arbitrarily setting V1 and V2. The electrostatic atomization amount of another electrostatic atomizer 7b is varied, the average particle diameter of nanometer-sized charged fine particle water generated by one electrostatic atomizer 7a, and the other electrostatic atomizer 7b. The average particle diameter of the generated nanometer-sized charged fine particle water can be varied. For example, one electrostatic atomizing section 7a stably generates charged fine particle water having an average particle diameter of 10 to 30 nanometers, and the other electrostatic atomizing section 7a has charged fine particles having an average particle diameter of 90 to 110 nanometers. Water can be generated stably.

  Thereby, for example, when the discharge space of the charged fine particle water generated at the first discharge electrode 2 and the discharge space of the charged fine particle water generated at the second discharge electrode 4 are made different, the charged fine particle is different on one side and the other side. It becomes possible to vary the amount of water discharged and the average particle diameter of the discharged charged fine particle water. In addition, when the charged fine particle water generated by the first discharge electrode 2 and the second discharge electrode 4 is discharged into the same space, not only the discharge amount of the charged fine particle water can be increased, but also the discharged nanometer-sized charged fine particle water can be averaged. Charged fine particle water having a wide particle diameter range (having two peak values of average particle diameter) can be discharged.

  In the embodiment of FIG. 1, the first discharge electrode 2 is connected to the negative electrode on the low potential side, and the second counter electrode 5 is connected to the positive electrode on the high potential side, but the first discharge electrode 2 is connected to the high potential side and the second counter electrode. The electrode 5 may be connected to the low potential side. In this case, both the two electrostatic atomizing portions 7a and 7b can stably generate a large amount of charged nanometer-sized charged fine particle water.

DESCRIPTION OF SYMBOLS 1 High voltage power supply 2 1st discharge electrode 3 1st counter electrode 4 2nd discharge electrode 5 2nd counter electrode 6 Liquid supply means

Claims (3)

  A first discharge electrode connected to either the lower potential side or the higher potential side than the reference potential of the high-voltage power source, a first counter electrode opposed to the first discharge electrode, and a first discharge electrode connected to the first counter electrode Two discharge electrodes, and a second counter electrode facing the second discharge electrode and connected to either the lower potential side or the higher potential side than the reference potential of the high-voltage power source, and the first counter electrode, An electrostatic atomizer comprising: a liquid supply means for connecting the second discharge electrode to a reference potential point of the high-voltage power supply and supplying a liquid to the first discharge electrode and the second discharge electrode. .   The electrostatic atomizer according to claim 1, wherein the potential difference between the first discharge electrode and the first counter electrode is the same as the potential difference between the second discharge electrode and the second counter electrode. The electrostatic atomizer according to claim 1, wherein a potential difference between the first discharge electrode and the first counter electrode is different from a potential difference between the second discharge electrode and the second counter electrode.

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