JP4470786B2 - Electrostatic atomizer - Google Patents

Description

  The present invention relates to an electrostatic atomizer for generating nanometer-sized charged fine particle mist.

Conventionally, an electrostatic atomizer is known as an atomizer that generates nanometer-size mist (see, for example, Patent Document 1). This includes a liquid reservoir containing water as a liquid, a transport body that sucks water in the liquid reservoir by capillary action and leads it to an atomization section formed at the tip, and a counter electrode that faces the atomization section of the transport body An application unit that applies a high voltage to the water in the liquid reservoir, and causes electrostatic atomization by causing Rayleigh splitting in the water present in the atomization unit of the carrier that is a discharge point between the counter electrode As a result, mist of charged fine particle water of nanometer size is generated.
Japanese Patent No. 3260150

  By the way, although this electrostatic atomizer is incorporated in various devices and used, the assembly position of the liquid reservoir differs depending on what is incorporated, so the atomizing portion of the carrier led out from the liquid reservoir is used as the counter electrode. The installation work for installing at a predetermined position so as to face each other is complicated.

  For this reason, the atomization part is not formed integrally with the transport body, but the atomization part has an atomization part so that the atomization part can be set in a predetermined positional relationship with the counter electrode in advance. There has been a demand for a transport supply body that transports a liquid to the atomizing portion of the electrode as a separate body and that can be attached to the atomization electrode by a simple mounting operation.

  The present invention has been invented in view of the above-described conventional problems, and the object of the present invention is to easily transfer a transport supply body for transporting liquid from a liquid reservoir to an atomization electrode having an atomization section. It is an object of the present invention to provide an electrostatic atomizer that can be attached by an attaching operation.

In order to solve the above problem, in the electrostatic atomizer according to claim 1, the liquid reservoir 1 that stores the liquid L to be electrostatically atomized, and the transport that transports the liquid L from the liquid reservoir 1. A supply unit 2, an application unit 3 that applies a voltage to the liquid L, and an atomization unit 40 that has a cover-cylinder shape, and has a through-hole 41 through which the liquid lid L is inserted from the back side to the front side. The atomizing electrode 4 and the counter electrode 5 facing the atomizing portion 40 of the atomizing electrode 4. The conveying supply body 2 is fitted into the opening 42 at the end of the atomizing electrode 4 and the conveying is performed. In an electrostatic atomizer that electrostatically atomizes the liquid L conveyed by the supply body 2 from the liquid reservoir 1 through the insertion hole 41 through the surface of the atomizer 40, The inner diameter D ₀ is formed to be larger than the outer diameter d of the conveyance supply body 2, and the atomization electrode 4 increases toward the atomization section 40 at the tip. It is characterized in that it is formed so that the inner diameter of is small. By setting it as such a structure, the conveyance supply body 2 can be easily engage | inserted in the opening 42 of the atomization electrode 4, and attachment work becomes easy.

  Further, the invention of claim 2 is characterized in that, in the invention of claim 1, the conveyance supply body 2 is formed of a flexible member. By adopting such a configuration, the transport supply body 2 can move in the opening 42 of the atomizing electrode 4, and even when the liquid reservoir 1 and the atomizing electrode 4 are incorporated in a product having a different positional relationship, the attachment work is performed. Can be simplified, and an unnecessary bending moment or the like applied to the conveyance supply body 2 can be reduced.

Further, the invention of claim 3 is the invention of claim 1 or 2, wherein the outer diameter d of the front end portion of the transport supply body 2 is formed to be substantially the same or slightly smaller than the inner diameter D ₂ of the front end portion of the atomizing electrode 4. It is characterized by comprising. By setting it as such a structure, the conveyance supply body 2 can be fitted to the front-end | tip part of the atomization electrode 4, and a lot of liquid L can be conveyed by the conveyance supply body 2 to the atomization part 40. The amount of atomization can be increased.

  In the present invention, the transport supply body can be easily fitted into the opening of the atomization electrode, and the transport supply body for transporting the liquid from the liquid reservoir can be easily applied to the atomization electrode provided with the atomization section. Can be installed by installation work

  Hereinafter, the present invention will be described with reference to the accompanying drawings. First, the overall configuration of the electrostatic atomizer will be described.

  As shown in FIG. 1, the electrostatic atomizer includes a liquid reservoir 1 that contains the liquid L to be electrostatically atomized, a transport supply body 2 that transports the liquid from the liquid reservoir 1, and the liquid L An application unit 3 that applies a voltage, an atomizing electrode 4 that has an atomizing unit 40 at the tip thereof and has a covered cylindrical shape into which the transport supply body 2 is fitted, and a countering that faces the atomizing unit 40 of the atomizing electrode 4 In the atomization unit 40, the liquid supply unit 2 sucks up and conveys the liquid L from the liquid reservoir 1 by applying a high voltage between the application unit 3 and the counter electrode 5. Electrostatic atomization generates nanometer-sized charged fine particle mist.

  The liquid reservoir 1 is composed of a sealed container that stores the liquid L to be electrostatically atomized. As the liquid L, tap water is usually used, but water such as ground water, electrolytic water, pH adjusted water, and dew condensation water is also used. Also, mineral water, or liquid L containing useful ingredients such as vitamin C and amino acids, aroma oil, fragrance, deodorant, etc. are envisaged and are not particularly limited. From the liquid reservoir 1, the conveyance supply body 2 is led out from the inside to the outside.

The transport supply body 2 is a porous body made of ceramic or metal or resin, a capillary formed of a resin or metal having gaps or holes that cause capillary action, fibers such as felt, etc., and the liquid L by capillary action. In this embodiment, as shown in FIG. 4, the transport supply body 21 and the coating 22 formed of a flexible resin capillary are used. becomes, the outer diameter _{d 2} of the conveyor supplying member body 21 has a curved φ0.55mm (R0.275mm), there was coated on the distal side 22 than the front end portion vicinity of the conveyor feed 21 Its outer diameter d ₁ is φ0.8 mm. One or a plurality of conveyance paths 23 having a diameter or width of 0.02 to 0.1 mm for conveying and supplying the liquid L by capillary action from the end to the tip are formed in the conveyance supply body 21 so as to penetrate therethrough. .

The atomizing electrode 4 has a cylindrical shape with a lid at the tip to become the atomizing portion 40, and the material is excellent in corrosion resistance, wear resistance, and chemical resistance like stainless steel such as SUS304 and SUS316. Examples thereof include, but not limited to, titanium coated with platinum, iron coated with titanium, and the like. In the present embodiment, the length is 10 to 20 mm, made of SUS316 wall thickness has a lidded cylindrical 0.075 mm, inside diameter _{D 3} of the top end atomizing unit 40 of the as shown in FIG. 4 is 0.6 mm ( The outer diameter φ0.75 mm), the inner diameter D ₀ of the terminal opening 42 is φ1.85 mm (outer diameter φ2 mm), and the middle part of the opening 42 becomes smaller toward the atomizing portion 40 at the tip. In this embodiment, the inner diameter _{D 1} is Fai1.35Mm (outer diameter 1.5 mm) as shown in FIG. 2, but is reduced stepwise and so the inner diameter _{D 2} is Fai0.85Mm (outside diameter Ø1 mm), It may be continuously reduced. In addition, the thickness of the atomization electrode 4 should just be 0.05-0.1 mm.

  The atomizing section 40 is formed with an insertion hole 41 through which the liquid L is inserted from the back surface side to the front surface side. As shown in FIG. 3 (a), the insertion holes 41 are formed by forming three circular holes of φ0.15 mm on a concentric circle centered on the top at equal intervals, or as shown in FIG. Are formed at equal intervals on a concentric circle with the top as the center, or three slits with a width of 0.15 mm are formed radially at the top as shown in FIG. 3 (c). As shown in FIG. 3 (d), four slits with a width of 0.15 mm are formed radially at equal intervals with the top as the center. Are preferably formed at equal intervals on a concentric circle with the top as the center, and if it is a slit, it is preferable to form a thing having a width of 0.01 to 0.2 mm radially at the center with the top as the center, but particularly limited Not done. By forming such an insertion hole 41, the liquid L can be supplied to the surface of the atomization part 40 by the capillary phenomenon and the electrostatic force of the electric field applied between the atomization electrode 4 and the counter electrode 5 which will be described later. .

  In addition, when the inner diameter of the edge of the counter electrode 5 is φ5 to 20 mm and the distance between the counter electrode 5 is 2 to 10 mm, the atomizing portion 40 preferably has an outer diameter of φ0.1 to 5 mm. When it becomes larger, discharge does not occur unless a very high voltage is applied between the application unit 3 and the counter electrode 5 in order to cause discharge between the counter electrode 5.

  The atomizing electrode 4 is inserted into the surface of the atomizing unit 40 through the insertion hole 41 through the insertion hole 41 by inserting the conveying supply body 2 from the opening 42 at the end and conveying the conveying L from the liquid reservoir 1. When the transport supply body 2 is fitted, the gap between the back surface of the atomizing section 40 and the front end of the transport supply body 2 is 0.1 mm or less (0.05 mm in this embodiment). Preferably, the gap in the radial direction may be 0.05 to 0.2 mm, whereby the liquid L is transported into these gaps by capillary action and along the back surface side of the atomizing portion 40 of the atomizing electrode 4. The liquid L is supplied so as to spread.

  The counter electrode 5 and the application unit 3 are both made of a synthetic resin mixed with a conductive material such as carbon or a metal such as stainless steel, thereby having conductivity. As shown in FIG. 1, the counter electrode 5 is formed in a circular shape surrounding the periphery of the atomizing electrode 4 when viewed from the tip direction of the atomizing electrode 4, and the inner diameter of the edge is φ8 mm. The distance between the inner edge and the atomizing portion 40 is set to be 5 mm. As long as the inner edge of the counter electrode 5 has an arc shape, the length of the arc may be as long as it is shorter than the circumference. When a high voltage is applied between the counter electrode 5 and the application unit 3, it is preferable to apply an electric field strength of 500 V / mm or more between the atomization unit 40 and the counter electrode 5.

  Here, the counter electrode 5 and the atomizing electrode 4 having the atomizing section 40 are fixedly attached to the same casing C so that the positional relationship thereof is a predetermined positional relationship as described above. The application unit 3 is also fixed to the casing C. As described above, since the diameter of the atomizing portion 40 decreases toward the atomizing portion 40 at the tip, it can be press-fitted and attached to the casing C as shown in FIG. However, it is not particularly limited. In addition, the conveyance supply body 2 may be fixed to the atomizing electrode 4 with an adhesive or the like, but is not particularly limited such as caulking or welding.

  The electrostatic atomization by this electrostatic atomizer is demonstrated. When a high voltage is applied between the atomizing unit 40 and the counter electrode 5 via the applying unit 3 by a high voltage power supply (not shown), the atomizing electrode 4 is transported from the liquid reservoir 1 by the transport supply body 2. The liquid L is spread by the capillary phenomenon in which the liquid L spreading in the gap on the back surface side of the atomizing section 40 is generated in the insertion hole 41 and the electrostatic force of the electric field generated between the atomizing section 40 and the counter electrode 5. It moves from the back surface side of the atomizing section 40 to the front surface side to form a tailor cone. Then, electrostatic atomization is performed, which causes so-called Rayleigh splitting, which repeats splitting by the repulsive force of negative charges accumulated at the tip of the tailor cone, and generates mist of negative ions of nanometer size particle size. Active species rich in nature are produced.

The present invention is such that the mounting work on the atomization electrode 4 of the conveyor supplying member 2 of the electrostatic atomizer is simplified, the outer diameter d of the inner diameter D ₀ of the transfer donor second opening 42 of the atomizing electrode 4 And the inner diameter of the atomizing electrode 4 is formed so as to decrease toward the atomizing portion 40 side at the tip. Thereby, the conveyance supply body 2 can be easily fitted into the opening 42 of the atomizing electrode 4, and the attachment work is simplified. In addition, since the tip of the transport supply body 2 is covered with the atomizing electrode 4, the tip of the transport supply body 2 is not easily deformed or damaged, and the electrostatic atomization is stable without interrupting the transport of the liquid L. Done.

  In addition, since the conveyance supply body 2 is formed of a flexible member, the conveyance supply body 2 can move in the opening 42 of the atomization electrode 4, and the positions of the liquid reservoir 1 and the atomization electrode 4 are moved. Even when the product is incorporated in a product having a different relationship, the mounting operation is simplified and unnecessary bending moment applied to the transport supply body 2 is reduced.

Moreover, it was the outer diameter d of the distal end portion of the conveyor supplying member 2 is slightly smaller substantially the same as or than the inner diameter D ₂ of the front end portion of the atomizing electrode 4, the tip of the atomization electrode 4 a transport supplier 2 (That is, the back side of the atomizing unit 40) can be fitted, and a large amount of the liquid L can be conveyed to the atomizing unit 40 by the conveyance supply body 2, and the atomization amount can be increased.

  In addition, instead of the liquid reservoir 1, a dew condensation means using a Peltier element or the like that cools moisture in the atmosphere and causes dew condensation may be used.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of one Embodiment of this invention, (a) is a sectional side view, (b) is a front view. (A) It is side sectional drawing of an atomization electrode same as the above, a conveyance supply body, and an application part, (b) is a front view of an atomization electrode and a conveyance supply body. (A) (b) (c) (d) is a front view of the example of each atomization part. The atomization electrode same as the above and the front-end | tip part of a conveyance supply body are shown, (a) is a sectional side view, (b) is AA sectional drawing of (a). It is a sectional side view explaining press injection to the casing of an atomization electrode.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid storage part L Liquid 2 Conveyance supply body 3 Application part 41 Insertion hole 40 Atomization part 4 Atomization electrode 5 Opposite electrode 42 Opening D ₀ Opening inside diameter d Outer diameter of conveyance supply body

Claims (3)

  A liquid reservoir portion for storing the liquid to be electrostatically atomized, a transport supply body for transporting the liquid from the liquid reservoir portion, an application portion for applying a voltage to the liquid, and a lid-shaped lid portion at the tip thereof Comprises an atomizing electrode to be an atomizing part having an insertion hole for allowing liquid to pass from the back side to the front side, and a counter electrode facing the atomizing part of the atomizing electrode, and an opening at the end of the atomizing electrode In an electrostatic atomizing apparatus, an atomizing apparatus is provided in which a transport supply body is fitted in and the liquid transported by the transport supply body is passed through the surface of the atomizing section through an insertion hole and electrostatically atomized. An electrostatic mist characterized in that the inner diameter of the opening of the electrode is formed larger than the outer diameter of the transport supply body, and the inner diameter of the atomizing electrode is made smaller toward the atomizing section at the tip. Device.   The electrostatic atomizer according to claim 1, wherein the conveyance supply body is formed of a flexible member.   The electrostatic atomizer according to claim 1 or 2, wherein the outer diameter of the tip of the transport supply body is formed to be substantially the same as or slightly smaller than the inner diameter of the tip of the atomizing electrode.

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