JP2006205013A - Apparatus for electrostatic aerification - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for electrostatic aerification by condensation of moisture which is capable of simultaneously and stably releasing ionic mist from each discharge electrode part and of increasing the amount of ionic mist. <P>SOLUTION: The electrostatic aerification apparatus 2 dews the moisture in air by cooling the discharge electrode part 1 to produce water by moisture condensation at the discharge electrode part 1 and spreads the above water to air as ionic mist by electrostatic aerification. The electrostatic aerification apparatus 2 is composed of two or more of discharge electrode parts 1, an endothermic body 3 to cool theses discharge electrode parts 1 and a counter electrode part 4. The cooling temperature at the end part of an electrode bar 5 to form each the discharge electrode part 1 is almost the same. The electric field strength at the end part of the electrode bar 5 to form each discharge electrode part 1 at the time of high voltage application is almost the same. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electrostatic atomizer that generates nanometer-sized ion mist by an electrostatic atomization phenomenon.

  Conventionally, a discharge electrode part, a counter electrode part positioned opposite the discharge electrode part, and a supply means for supplying water to the discharge electrode part are provided, and a high voltage is applied between the discharge electrode part and the counter electrode part. Patent Document 1 discloses an electrostatic atomizer that atomizes water held in a discharge electrode portion to generate ion mist.

However, the conventional electrostatic atomizer shown in the above-mentioned patent document 1 is a suction type electrostatic atomizer in which the water accumulated in the water reservoir is transported to the tip of the discharge electrode using the capillary phenomenon. This is a device, and there is a problem that the user has a trouble of having to add one after another if the water in the water storage part runs out, which is inconvenient. Further, in the above electrostatic atomizer, when the water to be supplied is water containing impurities such as Ca and Mg such as tap water, the impurities react with CO ₂ in the air and the water transport unit CaCO ₃ , MgO, or the like is deposited on the tip of the glass, obstructing the supply of water due to capillary action, and clogging the capillaries, which prevents the generation of ion mist for these reasons.

  Therefore, in order to solve the above problem, in the course of reaching the present invention, the inventor cools the air by the endothermic body to condense moisture in the air to generate dew condensation water, which is used as the discharge electrode unit. Or the moisture in the air is cooled and condensed directly on the discharge electrode part to generate condensed water on the discharge electrode part, and the condensed water generated on the discharge electrode part is formed in the air by electrostatic atomization. Has developed a condensation-type electrostatic atomizer that emits ion mist.

  However, this dew condensation type electrostatic atomizer has only one discharge electrode part, and the amount of released ion mist is limited. To increase the amount of discharge, a plurality of electrostatic atomizers are used. There is a problem that it is necessary to operate the apparatus, and the cost is increased and the entire apparatus is enlarged.

  Also, in the suction type electrostatic atomizer that sucks up the water stored in the water storage part, a plurality of discharge electrode parts are provided, and water is transferred from the water storage part to the plurality of discharge electrode parts, respectively, thereby increasing the amount of released ion mist. Although the technology has been conventionally used, in a dew condensation type electrostatic atomizer, the amount of ion mist cannot be increased simply by increasing the number of discharge electrodes.

This is because in a condensation-type electrostatic atomizer, in order to achieve stable ion mist emission, the amount of condensed water produced, the conditions of discharge (electric field strength near the discharge, electric lines of force), etc. are strictly controlled. It is necessary to maintain it for a long time. That is, if there is a slight deviation in the amount of condensed water produced in each discharge electrode part and the discharge conditions in each discharge electrode part, even if stable ion mist is generated from a certain discharge electrode part, In the discharge electrode portion, it has been found that a phenomenon such as excessive or insufficient dew condensation water, a discharge electric field intensity that is too strong, or a discharge electric field intensity that is too weak occurs, and ion mist emission is not performed.
Japanese Patent No. 3260150

  The present invention was invented in view of the above-described conventional problems, and in a dew condensation type electrostatic atomizer, discharge of ion mist from each discharge electrode portion can be performed simultaneously and stably. An object of the present invention is to increase the amount of ion mist without changing the amount of power for cooling the battery.

  In order to solve the above problems, the electrostatic atomizer according to the present invention cools the discharge electrode unit 1 to condense moisture in the air to generate condensed water in the discharge electrode unit 1, and An electrostatic atomizing device 2 that diverges as ion mist in the air by electroatomization, comprising two or more discharge electrode portions 1, a heat absorber 3 for cooling these discharge electrode portions 1, and a counter electrode And the electric field at the tip of each electrode rod 5 that becomes the respective discharge electrode portion 1 when a high voltage is applied. It is characterized in that the strength is substantially the same.

  By adopting such a configuration, in the dew condensation type electrostatic atomizer 2, the ion mist can be discharged simultaneously from two or more discharge electrode portions 1, and the heat absorber. 3, that is, the amount of generated ion mist increases without substantially changing the amount of power for cooling each discharge electrode portion 1, and accompanying this, the adhesion deodorization performance, allergen substance removal performance, removal Bacteria performance is improved, and in the dew condensation type electrostatic atomizer 2, the device size is larger than that operated by using a plurality of electrostatic atomizers when increasing the amount of ion mist. Can be made compact without increasing the size.

  Further, it is preferable that the two or more electrode rods 5 are constituted by paths that branch from the base 6 cooled by the heat absorber 3 to the two or more discharge electrode parts 1.

  With such a configuration, since the base 6 that is absorbed by the heat absorber 3 and cooled is common, two or more electrode rods 5 are uniformly cooled, and the discharge electrode at the tip of each electrode rod 5 is discharged. The cooling temperature of the part 1 can be easily aligned.

  Moreover, it is preferable that the tip shapes of all the discharge electrode portions 1 are equal and the distances from all the discharge electrode portions 1 to the counter electrode portions 4 are set equal.

  By setting it as such a structure, the electric field strength of each discharge electrode part 1 can be arrange | equalized with high precision easily.

  Further, it is preferable that the portions constituting the electrode rod 5 are made of the same material, and each electrode rod 5 is arranged symmetrically with respect to the branch point 7 from the base portion 6.

  By setting it as such a structure, the temperature of the discharge electrode part 1 of the front-end | tip part of each electrode stick | rod 5 can be arrange | equalized with high precision.

  Moreover, it is preferable to make electrical connection for energizing the electrode rod 5 on the base 6 side with respect to the branch portion 8.

  With such a configuration, an electrical connection for applying a high voltage can be achieved without breaking the temperature balance of the discharge electrode portion 1 at the tip of each electrode bar 5.

  Further, it is preferable to cover all or a part from the branching portion 8 to the base of the electrode rod 5 with the heat insulating material 9.

  By setting it as such a structure, the production | generation of the surplus dew condensation water which does not participate in atomization can be suppressed.

  In addition, it is preferable that the same counter electrode part 4 is arranged with respect to each discharge electrode part 1 so as to have the same positional relationship with respect to each electrode bar 5.

  With such a configuration, the electric field strengths of the respective discharge electrode portions 1 can be aligned with high accuracy, and ion mist generation efficiency can be maximized.

  According to the present invention, in a dew condensation type electrostatic atomizer, the discharge of ion mist from two or more discharge electrode portions is performed simultaneously and stably, and the amount of electric power for cooling each discharge electrode portion is almost changed. The amount of generated ion mist can be increased, and the adhesion deodorization performance, allergen substance removal performance and sterilization performance can be improved, and the amount of ion mist can be increased in the condensation type electrostatic atomizer. As a result, the device size is not increased and the device can be made compact.

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

  The electrostatic atomizer 2 of the present invention is composed of two or more discharge electrode portions 1, a heat absorber 3 for cooling these discharge electrode portions 1, and a counter electrode portion 4. A Peltier module 10 is used as the heat absorber 3 for cooling the discharge electrode portion 1.

  Two or more discharge electrode portions 1 are provided on a single electrode member 11, and the electrode member 11 connects a plurality of electrode rods 5 to a base portion 6 through a branch portion 8 from a base portion 6 cooled by an endothermic body 3. A plurality of electrode rods 5 are formed as projecting integrally in the opposite direction. In the embodiment shown in the accompanying drawings, the base portion 6 of the electrode member 11 is formed by providing a large-diameter bottom surface portion 6a having an area larger than that of the narrow neck portion 6b at one end portion of the narrow neck portion 6b. A branch portion 8 is provided at the end opposite to 6a.

  Here, the plurality of electrode rods 5 that are branched from the base 6 via the branching portion 8 are symmetrical with respect to the branching point 7 that is the center of the branching portion 8 from the base 6 (the embodiment of FIG. 2). In the example in which the two electrode rods 5 are branched and protruded through the branching portion 8 as described above, the two electrode rods 5 are 180 ° rotationally symmetric. When the projection 5 is branched and projected, the three electrode rods 5 are rotationally symmetrical to each other by 120 °. Further, the portions constituting each electrode rod 5 are formed of the same material. . In this case, the entire electrode member 11 including all the electrode bars 5 may be formed of the same material, and all the electrode bars 5 are formed of the same material, and the base 6 having the tip portion formed as the branching portion 8 is used as the electrode rod. 5 may be formed as a separate member, and a plurality of electrode rods 5 may be fixed to the branch portion 8. By comprising in this way, the thermal resistance of the discharge electrode part 1 of each front-end | tip part of the some electrode rod 5 can be unified, and the temperature distribution of each discharge electrode part 1 can be made substantially the same. Thereby, the several discharge electrode part 1 can be provided in the single electrostatic atomizer 2 without enlarging the dimension of an apparatus.

  The Peltier module 10 constituting the heat absorber 3 is formed by facing a pair of Peltier circuit boards having a circuit formed on one side of an insulating plate made of alumina or aluminum nitride having high thermal conductivity so that the circuits face each other. The BiTe-based thermoelectric elements arranged in multiple rows are sandwiched between the two Peltier circuit boards, and the adjacent thermoelectric elements are electrically connected by the circuits on both sides, and the energizing connector 19 provided in the Peltier module 10 is connected to Heat is transferred from one Peltier circuit board side to the other Peltier circuit board side by energization of a thermoelectric element made through a connected Peltier input lead wire.

  The outside of the Peltier circuit board on the cooling side of the Peltier module 10 is connected to a cooling insulating plate 12 made of alumina, aluminum nitride or the like with high thermal conductivity and high electric resistance through thermal conductive grease or the like, In addition, a high heat conductive heat dissipating portion 13 made of alumina, aluminum nitride or the like is connected to the outside of the Peltier circuit board on the other side (hereinafter referred to as the heat radiating side) via a heat conductive grease or the like. The heat dissipating part 13 is provided with a heat dissipating fin part 13a so that the electrode rod 5 can be cooled efficiently.

  The Peltier module 10 and the electrode member 11 constituting the heat absorber 3 are housed in the housing 14.

  The housing 14 includes a Peltier side housing part 14a and an electrostatic atomization side housing part 14b. The base 6 of the Peltier module 10 and the electrode member 11 is housed inside the Peltier-side housing portion 14a, and the large diameter of the end of the base 6 of the electrode member 11 is provided on the cooling insulating plate 12 provided on the cooling side of the Peltier module 10. The bottom surface portion 6a is in surface contact. The Peltier side housing portion 14 a of the housing 14 is fixed to the heat radiating portion 13.

  The narrow neck portion 6b of the base portion 6 of the electrode member 11 passes through a hole provided in a partition portion that partitions the Peltier side housing portion 14a and the electrostatic atomization side housing portion 14a, and branches into the electrostatic atomization side housing portion 14a. 8 and a plurality of electrode rods 5 protruding through the branching portion 8 are arranged.

  Here, in order to maintain a stable discharge in each discharge electrode portion 1, it is desirable to take a sufficient distance between the electrode rods 5, and a distance of 5 mm or more is preferable. In the embodiment, the distance between the electrode bars 5 is 10 mm.

  In the embodiment shown in the accompanying drawings, the Peltier-side housing portion 14a and the electrostatic atomizing-side housing portion 14b are separate from each other, and the upper bottom surface portion of the Peltier-side housing portion 14a is below the electrostatic atomizing-side housing portion 14b. The housing 14 is configured by overlapping the bottom surface portions and fixed by the fixing means (in this case, a partition is formed by the upper bottom surface portion of the Peltier side housing portion 14a and the lower bottom surface portion of the electrostatic atomizing side housing portion 14b. However, the Peltier side housing part 14a and the electrostatic atomization side housing part 14b may be integrally formed to form the housing 14.

  A lead plate 16 for energization is electrically connected to the base 6 of the electrode member 11. The connecting portion of the lead plate 16 to the electrode member 11 is located between the large-diameter bottom surface portion 6 a of the base portion 6 and the branch portion 8. Thereby, the temperature distribution from the branch part 8 to each discharge electrode part 1 becomes equal, and the amount of dew condensation in each discharge electrode part 1 can be made equal.

  A counter electrode portion 4 provided with an ion emission opening 17 is provided at an appropriate distance from the tip of each discharge electrode portion 1 at the tip of each electrode rod 5. It is fixed to the atomizing side housing part 14b.

  The counter electrode part 4 is composed of one counter electrode plate 15 having an opening 17 for ion emission, and the distance from the tip of each discharge electrode part 1 to the counter electrode plate 15 is made equal. Thus, a high voltage is applied between each discharge electrode portion 1 and the counter electrode portion 4 to generate electric field strength and electric lines of force equal to the respective discharge portions.

  The embodiment shown in FIGS. 1 to 4 is an example in which two discharge electrode portions 1 are provided, and two counter electrode portions 15 are provided with two ion emission openings 17 on one counter electrode plate 15. The two discharge electrode portions 1 are arranged so as to correspond to the two ion emission openings 17 respectively. Here, the two ion emission openings 17 are formed by circular holes having the same diameter, and the respective discharge electrode portions 1 are arranged at the centers of the circles of the respective ion emission openings 17.

  An air hole 18 is provided on the side surface of the electrostatic atomization side housing portion 14b in order to efficiently discharge the generated ions.

  Although not shown, when a high voltage is applied to the discharge electrode portion 1 side, it is necessary to seal the periphery of the cooling insulating plate 12 and the electrode member 11 with an insulating resin. That is, by sealing with an insulating resin as described above, leakage of water to the Peltier module 10 and the heat radiation fin portion 13a due to water condensed on the electrode rod 5 when a high voltage is applied is prevented.

  Next, the material of each member will be described. The electrode member 11 is preferably made of a material having good electrical conductivity and high thermal conductivity, such as copper, aluminum, silver, or an alloy thereof. The cooling insulating plate 12 is preferably made of a material having high thermal conductivity and high electrical insulation, and for example, a material such as alumina or aluminum nitride is preferable. The counter electrode plate 15 constituting the counter electrode portion 4 requires a material having electrical conductivity, and is preferably a metal or resin showing electrical conductivity. In the embodiment, SUS is used. The housing 14 is preferably made of an insulating material and has a low thermal conductivity in order to prevent heat loss. For example, a resin such as ABS, PPS, or PBT is preferable. As the heat radiating portion 13 having the heat radiating fin portion 13a, a material having high thermal conductivity is desirable, and for example, aluminum, copper, or the like is preferable. Further, as the sealing resin, epoxy resin, polyamide resin, urethane resin, and the like are effective.

  The principle of generating ion mist is as follows. First, the Peltier module 10 is energized to cool the electrode member 11 having the plurality of electrode bars 5 together with the cooling insulating plate 12. When the electrode rod 5 falls below the dew point temperature, moisture in the air begins to condense on the electrode rod 5, and dew condensation water is generated at each discharge electrode portion 1 at the tip of each electrode rod 5. When the condensed water is sufficiently generated in each discharge electrode portion 1 in this way, a high voltage is applied between each discharge electrode portion 1 and the counter electrode portion 4. When a high voltage is applied between each discharge electrode unit 1 and the counter electrode unit 4, the dew condensation water generated at the tip of each discharge electrode unit 1 is charged, and the Coulomb force acts on the charged dew condensation water, Condensed water rises into a cone with a sharp tip (Taylor Cone). If the voltage applied at this time exceeds the surface tension of water and is a high voltage capable of causing splitting and scattering (Rayleigh splitting), the condensed water generated in the discharge electrode portion 1 becomes a Taylor cone shape and becomes Rayleigh. Electrostatic atomization that causes splitting and generation of nanometer-sized ion mist is performed and released into the atmosphere.

  The nanometer-sized ion mist generated in this way is a nanometer-sized ion mist with active species (hydroxy radicals, superoxide, etc.). By releasing this into the room, only deodorization of indoor air can be achieved. It is possible to remove odors attached to the wall surface or clothing etc., and in addition to such adhesion deodorizing performance, there are allergen removal performance, sterilization performance, etc. .

  In this case, in order to release the mist containing negative ions, the counter electrode plate 15 constituting the counter electrode portion 4 is grounded, and a negative high voltage is applied to the electrode member 11 having the plurality of electrode rods 5, or A positive high voltage may be applied to the counter electrode plate 15 constituting the counter electrode unit 4 to ground the electrode member 11 having the plurality of electrode rods 5. Further, in order to release mist containing positive ions, the counter electrode plate 15 constituting the counter electrode portion 4 is grounded, and a positive high voltage is applied to the electrode member 11 having the plurality of electrode bars 5, or What is necessary is just to apply a negative high voltage to the counter-electrode board 15 which comprises the counter electrode part 4, and to earth | ground the electrode member 11 which has the several electrode rod 5. FIG.

  In the above, although the electrostatic atomizer 2 having two discharge electrode portions 1 has been described based on FIGS. 1 to 4, the electrostatic atomizer 2 having three or more discharge electrode portions 1 is provided. In this case, the amount of released ion mist further increases. The structure of the electrostatic atomizer 2 provided with three or more discharge electrode portions 1 is basically the same as the electrostatic atomizer 2 provided with two discharge electrode portions 1 described above, the shape of the electrode member 11, The shape of the counter electrode plate 15 constituting the counter electrode portion 4 and the shape of the housing 14 for fixing each member are different. As an example, FIG. 5 shows an example of an electrostatic atomizer 2 having three discharge electrode portions 1. In the embodiment shown in FIG. There are provided three ion emission openings 17 serving as the portions 4, and the three counter electrode portions 4 are opposed to the three discharge electrode portions 1, respectively. The distances up to 4 are equal.

  In each of the above-described embodiments, an example is shown in which each of the discharge electrode portions 1 is opposed to each discharge electrode portion 1 and each of the opening portions 17 for ion emission whose edge portion becomes the counter electrode portion 4 is provided. As shown in FIG. 1, one ion emission opening 17 is provided for a plurality of discharge electrode parts 1, and each discharge electrode part 1 is arranged concentrically from the center of the circle of the ion emission opening 17. They may be arranged at intervals. However, in order to improve the efficiency of generating ion mist emitted from each discharge electrode portion 1, it is desirable to provide one ion emission opening 17 for each discharge electrode portion 1.

  Moreover, as shown in FIG. 8, you may cover all or one part from the branch part 8 to the base of the electrode stick 5 with the heat insulating material 9 with low heat conductivity. Thereby, generation | occurrence | production of excessive dew condensation water can be prevented, and the electric leakage by excessive dew condensation and water dripping can be prevented. Effective materials for the heat insulating material 9 include resin heat insulating materials such as urethane resin and phenol resin, fiber heat insulating materials such as glass wool and ceramic fibers, and heat insulating paints mixed with ceramic.

  FIG. 9 is a comparison of the amount of released ion mist measured by a differential electrostatic classifier (DMA) when a plurality of discharge electrode portions 1 are provided. The discharge conditions of each discharge electrode part 1 were made the same, and it adjusted to the electric field strength of about 5 * 107 (V / m), and performed the stable electrostatic atomization in each discharge part. From this result, it can be seen that when the discharge electrode portion 1 is increased, the amount of ion mist released is increased accordingly. Thereby, adhesion deodorization performance, allergen removal performance, sterilization performance, etc. improve.

It is a perspective view of one embodiment of the electrostatic atomizer of the present invention. It is a top view same as the above. It is sectional drawing of the AA line of FIG. 2 same as the above. It is sectional drawing of the BB line of FIG. 2 same as the above. It is a perspective view of other embodiment of the electrostatic atomizer of this invention. It is a top view of other embodiment of the electrostatic atomizer of this invention. It is sectional drawing of the AA line of FIG. 6 same as the above. It is sectional drawing of other embodiment of the electrostatic atomizer of this invention. It is a graph which shows the discharge | release ion amount measurement result by a differential electrostatic classification device (DMA).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Discharge electrode part 2 Electrostatic atomizer 3 Endothermic body 4 Counter electrode part 5 Electrode rod 6 Base part 7 Branch point 8 Branch part 9 Thermal insulation

Claims (7)

  An electrostatic atomizer that cools a discharge electrode to condense moisture in the air to generate condensed water in the discharge electrode, and disperses the condensed water as ion mist in the air by electrostatic atomization. Consists of two or more discharge electrode parts, a heat absorber for cooling these discharge electrode parts, and a counter electrode part, and the cooling temperature of the tip part of the electrode rod that becomes each discharge electrode part is substantially the same And the electrostatic atomizer characterized by the electric field strength of the front-end | tip part of the electrode rod used as each discharge electrode part at the time of a high voltage application being substantially the same.   2. The electrostatic atomizer according to claim 1, wherein the two or more electrode rods are constituted by a path branched from a base part cooled by the endothermic body to the two or more discharge electrode parts. .   The electrostatic atomizer according to claim 1 or 2, wherein the tip shapes of all the discharge electrode parts are equal and the distances from all the discharge electrode parts to the counter electrode part are set equal.   3. The electrostatic atomizer according to claim 2, wherein the portions constituting the electrode rod are made of the same material, and each electrode rod is arranged symmetrically with respect to a branch point from the base portion.   5. The electrostatic atomizer according to claim 2, wherein electrical connection for energizing the electrode rod is performed on the base side with respect to the branch portion.   6. The electrostatic atomizer according to claim 2, 4 or 5, wherein all or a part from the branch portion to the base of the electrode rod is covered with a heat insulating material. 4. The electrostatic atomizer according to claim 3, wherein the same counter electrode portion is arranged for each discharge electrode portion so as to have the same positional relationship with respect to each electrode rod.

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