JP4670711B2 - Electrostatic atomizer - Google Patents

Description

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

  The electrostatic atomizer includes a discharge electrode, a counter electrode positioned opposite the discharge electrode, and a supply means for supplying water to the discharge electrode, and applies a high voltage between the discharge electrode and the counter electrode. In this way, water held in the discharge electrode is atomized to generate a negative ion mist (hereinafter referred to as nano ion mist) having a strong charge in the nanometer size (refer to Patent Document 1). The nano ion mist has a particle size of about 3 to several tens of nanometers, which is smaller than 70 nm, which is the size of the keratinocytes of the human body. Can penetrate the skin, exhibit high deodorizing and bactericidal effects, and the skin can be sufficiently replenished with water by the exposure of nano ion mist, resulting in a high moisturizing effect. In addition, since the effect of moisturizing the hair and the like can be obtained, various effects can be obtained by preparing for various products.

However, the conventional electrostatic atomizer as disclosed in the above-mentioned Patent Document 1 uses, as water supply means, a water tank filled with water and transports the water in the water tank to the discharge electrode by capillary action. Since it has a structure including a water transporting unit, the user needs to continuously replenish water in the water tank, and there is a problem that troublesome water replenishment is required. In the above electrostatic atomizer, when the water to be supplied to the water tank is water containing impurities such as Ca and Mg such as tap water, the impurities react with CO ₂ in the air. As a result, CaCO ₃ , MgO, or the like is deposited on the tip of the water transport section, thereby preventing the generation of nano ion mist.

Therefore, the present inventor considered that in the process leading to the present invention, the discharge electrode is cooled to condense moisture in the air to generate dew condensation water on the discharge electrode. If this is the case, water supply work as in the conventional example shown in Patent Document 1 is not necessary, and moisture in the air is condensed to obtain condensed water, so that conventional tap water is supplied. It has been found that there is no such thing as depositing and depositing CaCO ₃ , MgO, or the like as in the case of the conventional one.

  However, when the condensed water is generated on the discharge electrode by condensing moisture in the air by cooling the discharge electrode, the structure other than the discharge part at the tip of the discharge electrode is also cooled to generate condensed water. Depending on the usage environment, there is a problem that the cooling effect of the discharge part (or the vicinity of the discharge part and the discharge part), that is, the generation effect of condensed water in the discharge part (or the vicinity of the discharge part and the discharge part) decreases. Furthermore, depending on the structure and usage environment, the condensed water generated in the discharge part (or in the vicinity of the discharge part and the discharge part) is drawn to the condensed water side generated in other parts of the discharge electrode, and the water in the discharge part decreases. As a result, it has been found that there is a problem that stable tailor cones cannot be formed and stable discharge cannot be performed.

  In order to solve this, the inventor makes the heat insulating material 7 tightly contact the discharge electrode 1 as shown in FIG. 8 and exposes the discharge portion 4a at the tip to the outside, so that the discharge electrode 1 is cooled by the cooling means 2. When the moisture in the air is condensed on the discharge electrode 1 by cooling, dew condensation water is generated only in the discharge part 4a (or in the vicinity of the discharge part 4a and the discharge part 4a) of the discharge electrode 1, and the exposed part to the outside of the discharge electrode 1 It was considered to prevent the formation of condensed water in other parts.

However, in this case, since the heat insulating material 7 is provided in close contact with the periphery of the discharge electrode 1, when a large amount of excessive dew condensation water is generated at the exposed portion of the discharge electrode 1, excessive dew condensation that does not contribute to the discharge. Water flows and accumulates on the surface side of the heat insulating material 7 and the excessive dew condensation water becomes a relatively large water mass W so as to cover the entire exposed portion from the heat insulating material 7 to the outside of the discharge electrode 1 as shown in FIG. Therefore, it has been found that there is a problem that a stable tailor cone cannot be formed and stable discharge cannot be performed.
Japanese Patent No. 3260150

The present invention has been invented in view of the above-mentioned conventional problems, and does not require the trouble of replenishing water, and there is no phenomenon of preventing the generation of nano ion mist by depositing and adhering CaCO ₃ or MgO. Furthermore, the tip of the discharge electrode is effectively cooled to generate dew condensation water only where it is necessary for discharge atomization, so that a stable tailor cone can be formed and stable discharge can be achieved. When excessive condensed water is generated at the exposed part of the water, excess condensed water that does not contribute to discharge accumulates on the surface of the heat insulating material and covers the entire tip of the discharge electrode from the surface of the heat insulating material. Provided is an electrostatic atomizer capable of stabilizing discharge and stabilizing discharge, and further capable of supplying moisture to the surrounding environment when the surrounding environment is dried, stably generating condensed water, and performing stable discharge. This is a problem.

  In order to solve the above-mentioned problems, an electrostatic atomizer according to the present invention is provided for supplying condensed water to the discharge electrode 1 by cooling the discharge electrode 1 to condense moisture in the air to condense. A cooling means 2 and a high voltage application unit 3 for applying a high voltage to the discharge electrode 1 to electrostatically atomize the condensed water generated on the discharge electrode 1 are provided. 1 is provided with a heat insulating material 7 through a small gap 6 having an opening on the projecting direction side, and the discharge portion 4a at the tip of the discharge electrode 1 is exposed.

  With this configuration, water is supplied to the discharge electrode 1 based on the moisture in the air, so there is no need to replenish water, and the generated water contains no impurities. It becomes an electrostatic atomizer which does not require the trouble of kimono removal. In addition, since water is directly generated in the discharge electrode 1, it is possible to generate mist in a short time after the start of cooling, and it is also suitable for preparing products that are used only for a short time such as a hair dryer. It will be a thing. And since the heat insulating material 7 is provided around the discharge electrode 1 through the small gap 6 in which the projecting direction side of the discharge electrode 1 is an opening, the small gap 6 is hardly affected by the air flow in the external space. The portion functions as an adiabatic space, and when the discharge electrode 1 is cooled by the cooling means 2 and moisture in the air is condensed on the discharge electrode 1, condensed water is generated only at the portion exposed to the outside of the discharge electrode 1. Condensed water is not generated in this portion, thereby improving the cooling effect of the discharge portion 4a at the tip of the discharge electrode 1 (or the portion near the discharge portion 4a and the discharge portion 4a), and the discharge portion 4a of the discharge electrode 1 Condensation water can be stably generated in the discharge part 4a and the vicinity of the discharge part 4a, and when the amount of the dew condensation water generated in this part is large, the protrusion of the discharge electrode 1 in the small gap 6 Excess dew condensation water flows into the small gap 6 from the opening 5 on the direction side, Les allows stable discharge mass of water to cover the entire exposed portion of the heat insulating material 7 to the outside of the discharge electrode 1 is made so as not to generate. Further, when the surrounding environment is dried, the water that has entered the small gap 6 is supplied to the surrounding environment and condensed water is discharged to the discharge part 4a at the tip of the discharge electrode 1 (or the part near the discharge part 4a and the discharge part 4a). In this respect as well, it is possible to stably generate dew condensation water in the discharge part 4a (or the part near the discharge part 4a and the discharge part 4a) at the tip of the discharge electrode 1 and perform electrostatic atomization.

  Moreover, it is preferable to make the surface of the heat insulating material 7 into the inclined surface 8 inclined so that it may become the protrusion direction side of the discharge electrode 1 as it approaches the discharge electrode 1.

  By adopting such a configuration, when air is blown in the protruding direction of the discharge electrode 1 by the blowing means in order to convey the nano ion mist generated by electrostatic atomization, a part of the wind is applied to the surface of the heat insulating material 7. However, since the surface of the heat insulating material 7 is the inclined surface 8, the wind flows along the inclined surface 8 and flows in the protruding direction of the discharge electrode 1, and the air near the opening 5 of the small gap 6. There is no such thing as generating vortices. For this reason, the generated nano ion mist can be effectively discharged by riding on the air flow without involving the generated nano ion mist in a vortex. Further, since no eddy currents are generated in the vicinity of the opening 5, the air in the small gap 6 is disturbed and other than the discharge part 4a (or the part near the discharge part 4a and the discharge part 4a) at the tip of the discharge electrode 1. The heat is not taken away from the portion, and the heat insulating property of the small gap 6 is not lowered. In addition, when the amount of condensed water generated in the discharge part 4a at the tip of the discharge electrode 1 (or in the vicinity of the discharge part 4a and the discharge part 4a) is large, a part of the condensed water is opened in the small gap 6. Even if it flows over the surface of the heat insulating material 7 beyond the distance, it can flow in a direction away from the discharge electrode 1 along the inclined surface 8, and thus the entire portion exposed to the outside of the discharge electrode 1 from the heat insulating material 7 can be removed. Stable discharge can be achieved by avoiding the formation of covering water mass.

  Further, it is preferable to provide a water reservoir recess 9 for storing the water flowing in the small gap 6.

  By adopting such a configuration, surplus dew condensation water that has flowed into the small gap 6 can be stored in the water reservoir recess 9, and further covers the entire portion exposed to the outside of the discharge electrode 1 from the heat insulating material 7. Such a mass of water can be prevented and stable discharge can be performed. In addition, when the surrounding environment is dried, the water accumulated in the recess 9 for water reservoir is supplied to the surrounding environment and can generate condensed water in the exposed portion of the discharge electrode 1, and also in this respect, the discharge is stably performed. Electrostatic atomization can be performed by generating condensed water on the discharge part 4a (or the part near the discharge part 4a and the discharge part 4a) at the tip of the electrode 1.

  Moreover, it is preferable that the heat insulating material 7 is formed of a porous material having water retention.

  By adopting such a configuration, it is possible to retain excess condensed water in the heat insulating material 7 of the porous material, and water that covers the entire portion exposed from the surface of the heat insulating material 7 to the outside of the discharge electrode 1. Stable discharge can be achieved without generating lumps. Moreover, when the surrounding environment is dried, the water retained in the heat insulating material 7 of the porous material is supplied to the surrounding environment, and the discharge part 4a at the tip of the discharge electrode 1 (or the part near the discharge part 4a and the discharge part 4a) ) Can be generated, and the water can be more stably generated on the discharge part 4a (or the vicinity of the discharge part 4a and the discharge part 4a) at the tip of the discharge electrode 1 for electrostatic atomization.

  Moreover, it is preferable to form the recessed part 10 which puts excess dew condensation water on the surface of the heat insulating material 7.

  By adopting such a configuration, it is possible to retain excess condensed water in the recess 10 of the heat insulating material 7, so that a water mass that covers the entire exposed portion from the heat insulating material 7 to the outside of the discharge electrode 1 is not generated. And stable discharge. Moreover, when the surrounding environment is dried, the water retained in the recess 10 provided in the heat insulating material 7 is supplied to the surrounding environment, and the discharge part 4a at the tip of the discharge electrode 1 (or the vicinity of the discharge part 4a and the discharge part 4a). Condensed water can be generated in (part), and condensation can be generated more stably in the discharge part 4a (or the part near the discharge part 4a and the discharge part 4a) at the tip of the discharge electrode 1 for electrostatic atomization. .

  Moreover, it is preferable to form the hole 11 from the surface of the heat insulating material 7 on the side of the discharge electrode 1 in the protruding direction to the water reservoir recess 9.

  By adopting such a configuration, it is possible to retain excess dew condensation water from the hole 11 to the water storage recess 9, and water that covers the entire exposed portion from the heat insulating material 7 to the outside of the discharge electrode 1. Stable discharge can be achieved without generating lumps. In addition, when the surrounding environment is dried, the water retained in the water reservoir recess 9 is supplied to the surrounding environment and the discharge portion 4a at the tip of the discharge electrode 1 (or the portion near the discharge portion 4a and the discharge portion 4a). Condensed water can be generated in this manner, and the water can be more stably generated in the discharge part 4a (or the vicinity of the discharge part 4a and the discharge part 4a) at the tip of the discharge electrode 1 for electrostatic atomization.

  Moreover, it is preferable to hydrophilically treat the surface of the heat insulating material 7.

  By setting it as such a structure, the water of the surface of the heat insulating material 7 loses surface tension, and the water lump which covers the whole exposed part from the surface of the heat insulating material 7 to the exterior of the discharge electrode 1 does not generate | occur | produce further. And stable discharge can be achieved. And since the water of the surface of the heat insulating material 7 loses surface tension, water can be smoothly flowed to the small clearance gap 6 side.

In the present invention, since the discharge electrode is cooled by the cooling means to generate dew condensation water on the discharge electrode, there is no need for replenishment of water, and CaCO ₃ is supplied like tap water to the tip of the discharge electrode by capillary action. There is no phenomenon that deposits and deposits of MgO, etc. and prevents the generation of nano ion mist, and furthermore, it is effective only at the place necessary for electrostatic atomization due to the presence of a heat insulating material provided around the discharge electrode through a small gap In the case where condensation water is generated, a stable tailor cone is formed, electrostatic atomization is stable, and excessive condensation water is generated on the exposed part of the discharge electrode. It is possible to prevent the formation of a mass of water that covers the whole exposed part of the discharge electrode from the surface of the electrode, and it is possible to discharge stably and to supply moisture to the surrounding environment when the surrounding environment dries. Condensed water is generated stably And stable discharge.

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

  FIG. 1 shows a schematic configuration diagram of the electrostatic atomizer of the present invention, and FIG. The electrostatic atomizer of this example includes a discharge electrode 1, a cooling means 2 for cooling the discharge electrode 1 to condense moisture in the air and supplying condensed water to the discharge electrode 1, and the discharge electrode 1. And a high voltage application unit 3 for applying a high voltage to the discharge electrode 1 to electrostatically atomize the condensed water generated in the above.

  The cooling means 2 is constituted by a heat exchanger, and in the embodiment, a Peltier unit 13 is used. The Peltier unit 13 is arranged in multiple rows by 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 circuit sides face each other. BiTe-based thermoelectric elements are sandwiched between both Peltier circuit boards, and adjacent thermoelectric elements are electrically connected by circuits on both sides to constitute a Peltier module 14, which is made via a Peltier input lead wire 15. The Peltier module 14 is arranged such that heat is transferred from one Peltier circuit board side to the other Peltier circuit board side, with one side of the Peltier module 14 being a cooling side and the other side radiating heat. On the side.

  A cooling insulating plate 16 made of ceramic, alumina, aluminum nitride or the like and having high thermal conductivity and high electrical insulation is connected to the outside of the Peltier circuit board on the cooling side of the Peltier module 14, and the other side (hereinafter referred to as “the other side”). On the outside of the Peltier circuit board (referred to as the heat dissipation side), a highly heat-conductive heat sink 17 made of a metal such as aluminum is connected. In addition, as said Peltier circuit board, the circuit may be formed in the insulating board consisting of an epoxy resin or a polyimide resin, and the resin was made to contain the filler with high heat conductivity.

  The discharge electrode 1 is formed of a material having good thermal conductivity such as copper or copper alloy, and the tip of the tip 4 of the discharge electrode 1 is a discharge part 4a. The rear end is the cooling side of the Peltier unit 13, In the embodiment of FIG. 1, it is connected to a cooling insulating plate 16. The tip portion 4 includes a spherical portion or a weight-like portion with a sharp tip, and the leading end thereof is a discharge portion 4a.

The Peltier module 14 covers and covers the cooling insulating plate 16 and the cooling insulating plate 16 and the connecting portion at the rear end of the discharge electrode 1 so as to cover and cover the Peltier unit housing recess 19 at the bottom of the resin housing 21. The discharge electrode 1 protrudes from a hole 20 provided in the upper bottom portion of the Peltier unit housing recess 19 and is positioned in the discharge space inside the housing 21. Here, the insulating plate 16 for cooling and the bottom surface of the concave portion 19 for housing the Peltier unit of the housing 21 are fixed in a watertight manner through a sealing adhesive 30 such as a thermosetting resin. Is fixed to the heat radiating plate 17 in a watertight manner through a sealing adhesive 30 such as a thermosetting resin. As a result, the interior of the Peltier module 14 housed in the Peltier unit housing recess 19 of the housing 21 is sealed so that water does not enter. Also,
The housing 21 is provided with a high voltage application plate 22, and the metal high voltage application plate 22 is press-fitted into the discharge electrode 1 to mechanically and electrically connect the high voltage application plate 22 and the discharge electrode 1. Connected.

  A counter electrode 12 is provided at an upper portion of the housing 21 at a certain distance from the discharge part 4a at the tip of the discharge electrode 1, and the counter electrode 12 is formed of a material resistant to corrosion such as SUS.

  The high voltage application plate 22 and the counter electrode 12 are connected to the high voltage application unit 3 via high-voltage leads, respectively, and a high voltage is applied between the high voltage application unit 3 and the discharge electrode 1 and the counter electrode 12. It is to be applied.

  The discharge electrode 1 projecting into the discharge cavity of the housing 21 from the hole 20 in the upper bottom portion of the Peltier unit housing recess 19 of the housing 21 is provided with a heat insulating material 7 around the small gap 6 and the discharge electrode 1. The discharge part 4a at the tip is exposed to the outside. Here, in the embodiment shown in the accompanying drawings, there is shown an example in which the tip portion 4 having a spherical or weight-like portion of the discharge electrode 1 is exposed to the outside (that is, the tip (leading edge)). Not only the discharge part 4a but also the part in the vicinity of the discharge part 4a is exposed to the outside. However, the present invention is not necessarily limited to this, and only the discharge part 4a at the tip of the discharge electrode 1 is exposed to the outside. The small gap 6 is an opening 5 having an annular shape so that the projecting direction side of the discharge electrode 1 surrounds the circumferential direction of the discharge electrode 1. The small gap 6 has a short gap size and can flow into the air in the external space. Cooling effect of the discharge part 4a (or the part near the discharge part 4a and the discharge part 4a) that is not affected and functions as a space for heat insulation and exposed to the outside of the discharge electrode 1 It is designed to improve the discharge electrode Condensation does not occur in a portion other than the portion exposed to the outside (tip portion 4), and the width of the small gap 6 is preferably 0.2 to 1.0 mm, preferably 0.2 mm. If it is below, water is not sufficiently discharged from the opening 5 side into the small gap 6 due to surface tension, and excessive dew condensation water accumulates in the vicinity of the discharge part 4a at the tip of the discharge electrode 1 and discharge becomes unstable. Further, when the gap width dimension is 1.0 mm or more, the area where the wind that has flowed into the discharge electrode 1 hits the discharge electrode 1 increases, the heat insulating performance due to the small gap 6 decreases, and the discharge portion 4a (or This is not preferable because the cooling performance of the discharge part 4a and the vicinity of the discharge part 4a) is reduced.

  On the end of the small gap 6 opposite to the direction in which the discharge electrode 1 protrudes, there is provided a water reservoir recess 9 for collecting water flowing in the small gap 6, and the water reservoir recess 9 is attached to the drawing. In the embodiment shown in FIG. 4, the center portion on the back surface side of the heat insulating material 7 is recessed.

  In the electrostatic atomizer having the above-described configuration, when the thermoelectric elements are energized, heat is transferred in the same direction in each thermoelectric element, and one side of the Peltier unit 13 is cooled. The discharge electrode 1 is cooled via the cooling insulating plate 16 provided on the cooling side of one side of the Peltier unit 13, and the air around the discharge electrode 1 is cooled, so that moisture in the air is liquefied due to condensation or the like. As a result, dew condensation water is generated at the tip 4 which is the portion exposed to the outside of the discharge electrode 1. Then, in a state in which condensed water is generated and held in the discharge part 4a (or the part near the discharge part 4a and the discharge part 4a) at the tip of the discharge electrode 1, the discharge part of the discharge electrode 1 by the high voltage application part 3 When a high voltage of about 5 kV is applied between the discharge electrode 1 and the counter electrode 12 so that the charge is concentrated on the negative electrode side, the water held in the discharge portion is charged, and the Coulomb force is applied to the charged water. The water level rises locally in a cone shape (Taylor cone), the charge concentrates on the tip of the cone-shaped water, the charge density becomes high, and the repulsive force of the high-density charge Water is split and scattered (Rayleigh splitting) repeatedly to perform electrostatic atomization and generate a large amount of nano ion mist. The nano ion mist moves toward the counter electrode 12 positioned opposite to the discharge electrode 1, passes through the center hole of the counter electrode 12 fixed in the opening of the housing 21, and is released to the outside of the electrostatic atomizer. Is done.

  In this way, the discharge electrode 1 is cooled by the Peltier unit 13 which is the cooling means 2, and moisture in the air is condensed on the discharge portion 4a (or the portion near the discharge portion 4a and the discharge portion 4a) at the tip of the discharge electrode 1. In this way, the generated water is discharged and atomized, so that there is no need to replenish water as in the prior art, and water in the air is condensed to remove the water at the tip of the discharge electrode 1. Since it is generated in the discharge part 4a (or in the vicinity of the discharge part 4a and the discharge part 4a), it does not contain impurities like tap water, so there is no need to remove deposits, and water is directly generated in the discharge electrode 1. Because of this structure, it is possible to generate mist in a short time after the start of cooling, and for example, it is suitable for preparation for products that are used for a short time such as a hair dryer.

  Moreover, although the discharge electrode 1 is cooled to generate condensed water as described above, the heat insulating material 7 is provided around the discharge electrode 1 through the small gap 6. When the water is cooled by the cooling means 2 and the moisture in the air is condensed on the discharge electrode 1, the discharge part 4a at the tip of the discharge electrode 1, which is an exposed part to the outside (or the part near the discharge part 4a and the discharge part 4a) Condensed water is generated in this area, and condensed water is not generated or suppressed in other parts. Therefore, according to the present invention, the discharge portion 4a (or the portion near the discharge portion 4a and the discharge portion 4a) at the tip of the discharge electrode 1 can be effectively cooled to stably generate condensed water, and stable discharge. And can be stably electrostatic atomized. In addition, when excessive dew condensation water is generated when generating dew condensation water at the discharge part 4a (or the part near the discharge part 4a and the discharge part 4a) at the tip of the discharge electrode 1, the generated excess dew condensation water is opened 5 Into the small gap 6. Excess dew condensation water that has flowed into the small gap 6 accumulates in a water reservoir recess 9 that communicates with the small gap 6. Therefore, it is possible to prevent the formation of a mass of water that covers the entire exposed portion of the heat insulating material 7 (the surface on the protruding direction side of the discharge electrode 1) to the outside of the discharge electrode 1, and stable discharge can be performed. In addition, when the surrounding environment is dried, there is a possibility that the humidity is lowered and a situation in which dew condensation does not occur in the discharge part 4a (or the vicinity of the discharge part 4a and the discharge part 4a) at the tip of the discharge electrode 1 may occur. However, in such a case, the excess condensed water that has entered the small gap 6 and the recess 9 for water accumulation evaporates and is supplied to the surrounding environment so that the condensed water can be generated in the exposed portion to the outside of the discharge electrode 1. Also in this respect, electrostatic atomization can be performed by stably generating condensed water on the discharge part 4a (or the part near the discharge part 4a and the discharge part 4a) at the tip of the discharge electrode 1.

  By the way, when the surface of the heat insulating material 7 is a surface that is perpendicular to the protruding direction of the discharge electrode 1 as shown in FIG. 4, the discharge electrode is used by the blowing means to convey the nano ion mist generated by electrostatic atomization. 1, the air flow that flows along the surface of the heat insulating material 7 collides with the discharge electrode 1 as shown by the arrow b in FIG. 4, and the air flow swirls at the collision portion of the discharge electrode 1, The generated nano ion mist cannot be efficiently discharged and the nano ion mist cannot be efficiently discharged. Further, an air vortex is generated in the vicinity of the opening 5, and the air in the small gap 6 is disturbed so that the portion other than the portion exposed to the outside of the discharge electrode 1. When heat is removed even at the portion, the heat insulating property of the small gap 6 is reduced, and the cooling effect of the discharge portion 4a at the tip of the discharge electrode 1 (or the portion near the discharge portion 4a and the discharge portion 4a) is reduced. Can occur, but as above, the insulation 7 is made to be an inclined surface 8 that is inclined so as to be closer to the discharge direction of the discharge electrode 1 as it approaches the discharge electrode 1, so that wind flows along the inclined surface 8 as shown by the arrow a in FIG. Since it flows in the protruding direction of the electrode 1, the generated nano ion mist can be effectively discharged on the air flow, and no air vortex is generated near the opening 5 of the small gap 6. The air in the gap 6 is not disturbed and heat is not taken away from portions other than the exposed portion of the discharge electrode 1, and the heat insulation of the small gap 6 is not deteriorated. Moreover, the surface of the heat insulating material 7 is the inclined surface 8 that is inclined so as to be closer to the discharge electrode 1 in the projecting direction of the discharge electrode 1, so that the dew condensation water generated at the exposed portion of the discharge electrode 1. In the case where the amount of water is large, even if some condensed water flows over the opening 5 of the small gap 6 and flows to the surface of the heat insulating material 7, it can flow in a direction away from the discharge electrode 1 along the inclined surface 8. It is possible to prevent a water mass from covering the entire exposed portion from the surface of the heat insulating material 7 to the outside of the discharge electrode 1 and to perform stable discharge.

  As a material of the heat insulating material 7 used in the present invention, for example, a resin such as polycarbonate, Duracon, ABS, PP, PBT, PA, urethane resin, ceramic, felt, or the like can be used.

  Here, you may form the heat insulating material 7 with the porous material which has water retention. The heat insulating material 7 may be formed of a porous material such as porous ceramic, felt, expandable polyamide, or expandable urethane resin. Thus, by forming the heat insulating material 7 with a porous material having water retention capacity, it is possible to retain excess condensed water in the heat insulating material 7 of the porous material, and further, the exposed portion from the heat insulating material 7 to the outside of the discharge electrode 1. A stable discharge can be achieved by avoiding the formation of a mass of water that covers the entire surface. Moreover, when the surrounding environment is dried, the water retained in the heat insulating material 7 made of the porous material is supplied to the surrounding environment, and the discharge part 4a (or the part near the discharge part 4a and the discharge part 4a) at the tip of the discharge electrode 1 Condensed water can be generated at this point, and in this respect as well, the condensed water is generated more stably at the discharge part 4a (or the part near the discharge part 4a and the discharge part 4a) at the tip of the discharge electrode 1 and electrostatic atomization. Can be done.

  FIG. 5 shows another embodiment of the present invention. In the present embodiment, a recess 10 is formed on the surface of the heat insulating material 7 to put excess dew condensation water. When the dew condensation water is generated when the dew condensation water is generated at the exposed portion of the discharge electrode 1, the excess dew condensation water flows from the opening 5 into the small gap 6 as described above. When there is much water, a part of excessive dew condensation water may flow on the surface of the heat insulating material 7. Thus, even if a part of the excessive dew condensation water flows on the surface of the heat insulating material 7, the surplus dew condensation water is accumulated in the recess 10 on the surface of the heat insulating material 7 and is retained and discharged from the surface of the heat insulating material 7. It is possible to prevent the formation of a water mass that covers the entire exposed portion of the electrode 1 and stable discharge. Moreover, when the surrounding environment is dried, the water retained in the recess 10 provided in the heat insulating material 7 is evaporated and supplied to the surrounding environment, and the discharge part 4a (or the discharge part 4a and the discharge part at the tip of the discharge electrode 1) is supplied. 4a) (condensed water can be generated in the vicinity of the discharge electrode 4a), and condensation water can be generated more stably in the discharge part 4a at the tip of the discharge electrode 1 (or the part near the discharge part 4a and the discharge part 4a). Can be made.

  FIG. 6 shows still another embodiment of the present invention. In this embodiment, a hole 11 is formed from the surface of the heat insulating material 7 to the water reservoir recess 9. In the present embodiment, even if a part of the surplus dew condensation water flows on the surface of the heat insulating material 7, this surplus dew condensation water flows from the hole 11 on the surface of the heat insulating material 7 to the water storage recess 9 and is retained and retained. As a result, a mass of water that covers the entire exposed portion of the heat insulating material 7 to the outside of the discharge electrode 1 can be prevented, and stable discharge can be performed. In addition, when the surrounding environment is dried, the water retained in the water reservoir recess 9 is supplied to the surrounding environment and the discharge portion 4a at the tip of the discharge electrode 1 (or the portion near the discharge portion 4a and the discharge portion 4a). Condensed water can be generated in this manner, and the water can be more stably generated in the discharge part 4a (or the vicinity of the discharge part 4a and the discharge part 4a) at the tip of the discharge electrode 1 for electrostatic atomization.

  FIG. 7 shows still another embodiment of the present invention. In the present embodiment, the surface of the discharge electrode 1 of the heat insulating material 7 is subjected to a hydrophilic treatment to form a hydrophilic treatment portion 24. In the present embodiment, even if a part of the surplus dew condensation flows on the surface of the heat insulating material 7, the surface of the heat insulating material 7 is subjected to hydrophilic treatment, so that the water on the surface of the heat insulating material 7 loses the surface tension, and more. A stable discharge can be achieved by preventing the generation of a water mass that covers the entire exposed portion of the heat insulating material 7 to the outside of the discharge electrode 1. Moreover, since the water on the surface of the heat insulating material 7 on the projecting direction side of the discharge electrode 1 loses surface tension, the water can flow smoothly from the opening 5 to the small gap 6 side, and when the recess 10 is provided. Can smoothly enter the recess 10 to retain water, and when the hole 11 is provided, the water can flow smoothly into the hole 11.

  In any of the embodiments, the water reservoir recess 9 may be a simple space, but a water-absorbing member 9 is filled and water is absorbed in the water-absorbing recess 9. Water may be retained.

  In any of the above-described embodiments, a porous material having hygroscopicity may be provided in the water reservoir recess 9. In this case, water is retained in the porous material, so that the water retention effect is further improved. It will be certain.

It is a schematic block diagram of the electrostatic atomizer of this invention. It is principal part sectional drawing of an electrostatic atomizer same as the above. It is explanatory drawing which shows the flow of the wind at the time of making the surface of a heat insulating material same as the above into an inclined surface. It is explanatory drawing which shows the flow of a wind when the surface of a heat insulating material same as the above is orthogonal to the protrusion direction of a discharge electrode. It is principal part sectional drawing of other embodiment of the electrostatic atomizer same as the above. It is principal part sectional drawing of other embodiment of an electrostatic atomizer same as the above. It is principal part sectional drawing of other embodiment of an electrostatic atomizer same as the above. It is principal part sectional drawing which shows a problem in case the heat insulating material and the discharge electrode are closely_contact | adhered.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Discharge electrode 2 Cooling means 3 High voltage application part 4a Discharge part 5 Aperture 6 Small gap 7 Heat insulating material 8 Inclined surface 9 Recess for water sump 10 Recess 11 Hole

Claims (7)

  A discharge electrode; cooling means for cooling the discharge electrode to condense moisture in the air to generate condensed water on the discharge electrode; and discharging to electrostatically atomize the condensed water generated on the discharge electrode. A high voltage application unit for applying a high voltage to the electrode, and a heat insulating material is provided around the discharge electrode through a small gap having an opening on the projecting direction side of the discharge electrode, and a discharge unit at the tip of the discharge electrode is provided. An electrostatic atomizer characterized by being exposed.   The electrostatic atomizer according to claim 1, wherein the surface of the heat insulating material is an inclined surface that is inclined so as to be closer to the discharge direction of the discharge electrode as it approaches the discharge electrode.   The electrostatic atomizer according to claim 1 or 2, wherein a water reservoir recess for storing water flowing in the small gap is provided.   The electrostatic atomizer according to any one of claims 1 to 3, wherein the heat insulating material is formed of a porous material having water retention.   The electrostatic atomizer according to any one of claims 1 to 3, wherein a concave portion into which surplus dew condensation water is placed is formed on the surface of the heat insulating material.   The electrostatic atomizer according to any one of claims 1 to 3, wherein a hole is formed from the surface of the heat insulating material in the protruding side direction of the discharge electrode to the water reservoir recess.   The electrostatic atomizer according to any one of claims 1 to 3, or 5 to 6, wherein the surface of the heat insulating material is subjected to a hydrophilic treatment.

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