JP4768864B1 - Release pin member and electrostatic atomizer using the same - Google Patents

Abstract

Discharge pin member capable of discharging a large amount of mist to the outside without applying an unnecessarily high voltage in an electrostatic atomization apparatus for discharging mist containing a functional component to the outside It relates to the electrostatic atomizer used.
In an electrostatic atomizer that discharges mist containing a functional component to the outside, the device has a discharge pin member main body and a conductive material, and the discharge pin member main body is a porous body or a fiber molded body. The discharge pin member is characterized in that the conductive material is made of a conductive graphite compound, and the discharge pin member main body carries the conductive material.
[Selection] Figure 1

Description

  The present invention relates to a discharge pin member capable of discharging a large amount of mist to the outside without applying an unnecessarily high voltage in an electrostatic atomizer that discharges mist containing a functional component to the outside, and the same The present invention relates to an electrostatic atomization apparatus using the above.

2. Description of the Related Art Conventionally, an electrostatic atomizer that atomizes water containing a nonvolatile functional component by applying a high voltage and discharges it as mist is known. As the non-volatile functional component, for example, water containing a functional component such as vitamin C / amino acid, aroma oil, deodorant and the like are used. Generally, electrostatic atomizers transport water from a water storage part to the tip of a discharge pin member by capillary action, and the water is pulled up to a discharge pin member whose tip is formed of a porous body. By applying a high voltage to the member, mist is released from the tip. However, in the conventional electrostatic atomizer, when the water to be replenished to the water tank is water containing mineral components such as Ca and Mg such as tap water, this mineral component is CO in the air. _{In some} cases, CaCO ₃ , MgO, or the like is deposited on the atomizing portion of the water-absorbing body to cause mist generation. With respect to this problem, in Patent Document 1, by providing an ion exchange part for removing a mineral component in the water conveyance path, CaCO ₃ or MgO is generated by a reaction with CO ₂ in the air in a sharp atomization part. Disclosed is an electrostatic atomizer that can be used continuously without regular maintenance.

JP 2009-255091 A

  However, in the conventional electrostatic atomizer having an atomizing section that generates a mist by applying a high voltage, the porous body constituting the tip of the discharge pin member touches the air and causes an oxidation reaction. As a result, there was another problem that the oxide adhered and clogged the porous body. When the porous body is clogged in this way, the phenomenon that the water transport due to the capillary phenomenon is hindered and the electrostatic atomization becomes difficult to occur occurs, so that the deposit is deposited and clogged at the tip of the discharge pin member. It was necessary to perform maintenance to remove oxides and to apply a higher voltage than necessary for mist emission.

  In order to solve the above-mentioned problems, the present inventor has intensively studied paying attention to a discharge pin member for discharging mist, and as a result, by carrying a conductive material on the discharge pin member body, an unnecessarily high voltage can be obtained. It has been found that a large amount of mist can be released without application, and the present invention has been completed.

The discharge pin member according to the present invention is
A member used in an electrostatic atomizer that discharges mist containing functional components to the outside,
A discharge pin member body and a conductive material;
The discharge pin member main body is made of a porous body or a fiber molded body,
The conductive material is composed of conductive graphite compounding material,
The discharge pin member main body is loaded with the conductive material so that the electrical resistance value of the discharge pin member is 0.5 kΩ or more and does not exceed 10 kΩ,
In the lower surface part projected on the water retention part with which the electrostatic atomizer used is used, the said conductive graphite compounding material is not coat | covered, It is characterized by the above-mentioned.

The discharge pin member according to claim 1,
In the discharge pin member main body, the conductive material is supported by applying the conductive material to the surface.

The discharge pin member according to claim 1,
In the discharge pin member main body, the conductive material is supported by containing the conductive material therein.

The discharge pin member according to any one of claims 1 to 3,
The porous body or fiber molded body is formed by combining one or more of ceramic material, metal material, synthetic resin material, and natural resin material.

The discharge pin member according to any one of claims 1 to 4,
The conductive graphite compounding material has a conductive graphite content of 5 to 25 % by weight.

An electrostatic atomizer using the discharge pin member according to any one of claims 1 to 5,
A water reservoir,
A water retention part that absorbs water from the water storage part and holds the water;
A discharge pin member that discharges the mist projecting from the water retaining portion to the outside;
And an application electrode for applying a high voltage to the discharge pin member.

  According to the present invention, it is possible to discharge a large amount of mist without applying a high voltage more than necessary by supporting the conductive material on the discharge pin member, and at the same time, the removal by the mist containing the functional component. There is an effect that the fungus effect is improved. At the same time, since the porous body is not clogged, there is an advantage that electrostatic atomization can be performed stably without maintenance for a long period of time. The conductive material can be carried on the discharge pin member main body by applying the conductive material on the surface of the discharge pin member main body or by containing the conductive material therein.

  According to the present invention, the porous body or fiber molded body is formed by combining one or more of ceramic material, metal material, synthetic resin material, and natural resin material. The optimum material can be selected according to the final use of the discharge pin member.

According to the present invention, since the discharge pin member according to the present invention is characterized in that the conductive material has a conductive graphite content of 5 to 25 % by weight, the resistance value of the discharge pin member is suppressed. Mist can be discharged to the outside without applying a higher voltage than necessary.

It is the schematic which shows one Embodiment of the electrostatic atomizer which concerns on this invention. It is sectional drawing of the discharge | release pin member main body which consists of a porous body or a fiber molding. It is explanatory drawing which shows the process of apply | coating an electroconductive material to a discharge | release pin member main body. It is explanatory drawing which shows the process of apply | coating an electroconductive material to a discharge | release pin member main body. It is explanatory drawing which shows the kind of shape of a discharge | release pin member. It is explanatory drawing which shows the change of the electrical resistance value of the discharge | release pin member by the electroconductive graphite compounding rate. It is explanatory drawing of the installation in mist generation amount measurement. It is a graph which shows the result of mist generation amount measurement. It is explanatory drawing of the installation in disinfection effect measurement. It is a graph which shows the result of a disinfection effect measurement.

  Hereinafter, the present invention will be described with reference to embodiments for carrying out the invention. However, the following examples do not limit the invention according to the claims, and the characteristics described through the examples limit the present invention. It's not something to do.

  The discharge pin member according to the present invention is an electrostatic atomizer that discharges mist containing a functional component to the outside. The discharge pin member has a discharge pin member body and a conductive material, and the discharge pin member body is porous. The conductive material is made of a conductive graphite compound, and the discharge pin member main body carries the conductive material.

  The electrostatic atomizer which concerns on this invention atomizes the water containing a functional component by applying a high voltage, and discharge | releases it as mist. The electrostatic atomizer includes a water storage unit, a water retention unit that absorbs water from the water storage unit and retains water, a discharge pin member that discharges mist protruding from the water retention unit, and a high voltage applied to the discharge pin member. And an applying electrode. Among these, the discharge pin member projects from the water retention part, sucks up water containing the functional component held in the water retention part, and plays a role of releasing mist from the tip part to the outside. Therefore, it is necessary for the discharge pin member to have high water absorption and water retention. This is because the water containing the functional component is efficiently sucked up by the discharge pin member without staying in the water retaining portion, and the mist is discharged to the outside.

  The discharge pin member is formed by supporting a conductive material on a discharge pin member main body formed of a porous body or a fiber molded body. The porous body or the fiber molded body is formed by combining one or more of ceramic materials, metal materials, synthetic resin materials, and natural resin materials.

  A porous body refers to a material having innumerable minute pores inside, and the porous body is an aggregate of innumerable micropores rather than an aggregate of independent microbubbles. It is preferable to use it for sucking up water containing a functional component. For example, the porous body which sintered ceramic particle | grains and the metal particle as a rod-shaped body, and what formed foams, such as a urethane resin and a styrene resin, as a rod-shaped body are mentioned. A fiber molded body is one in which a large number of fibrous materials are converged and partially or totally bonded and integrated by self-bonding or adhesive, and the mesh void is used as a flow path for water containing functional components. It refers to the material that is formed. For example, ceramic fibers (ceramic fibers, glass fibers, etc.), organic fibers (polyester fibers, rayon fibers, nylon fibers, etc.), metal fibers (stainless fibers, copper fibers, titanium fibers, etc.) or a mixture of these as rod-shaped bodies What was formed is mentioned.

  Ceramic materials are single oxides such as silica, alumina, magnesia, titania, zirconia, or mullite, zeolite, bentonite, ceviolite, attapulgite, sillimanite, kaolin, sericite, diatomaceous earth, feldspar, glacial viscosity, silicic acid Although it refers to a salt compound (perlite, vanamicurite, sericite, etc.) or the like or a combination comprising at least one of the foregoing, it is not limited to this. Examples of the metal material include stainless steel, copper, titanium, tin, platinum, gold, and silver, but are not limited thereto. Examples of the synthetic resin material include polyester, nylon, rayon, urethane (including polyurethane), acrylic, and polypropylene, but are not limited thereto. Examples of the natural resin material include, but are not limited to, pulp fiber, cotton, wool fiber, hemp fiber and the like.

  Further, the fiber molded body may be formed by converging and fixing a plurality of hollow fibers. The hollow fiber refers to a straw-like fiber having a cavity inside, and is used synonymously with an ultrafine tube, a capillary, a hollow fiber, or the like. The outer diameter of the hollow fiber is 0.2 mm or less, preferably 0.1 mm or less, and the inner diameter is preferably 10 μm or more and 50 μm or less. The raw material used for the hollow fiber may be either an organic material or an inorganic material as long as it can be processed into a hollow fiber. For example, nylon 6 (registered trademark), nylon 66 (registered trademark), aromatic polyamide, etc. Polyamide fibers, polyethylene terephthalate, polybutylene terephthalate, polyester fibers such as polylactic acid, polyglycolic acid and polycarbonate, acrylic fibers such as polyacrylonitrile, polyolefin fibers such as polyethylene and polypropylene, Polymethacrylate fibers such as polymethylmethacrylate, polyvinyl alcohol fibers, polyvinylidene chloride fibers, polyvinyl chloride fibers, polyurethane fibers, phenol fibers, polyvinylidene fluoride and polytetra Fluoro Fluorine-based fibers consisting of styrene, etc., and materials such as carbon fiber such as carbon nanotubes.

  Examples of the shape of the discharge pin member include those formed of a ceramic material or the like as a rod-like body, but the shape is not limited to this, and may be an elliptical column shape, a conical shape, a prismatic shape, or the like. Moreover, it is preferable that the front-end | tip part of a discharge | release pin member is a curved surface shape rounded rather than planar shape. If the shape is sharp and sharp, the current does not spread to the tip of the discharge pin member, which is not preferable because water containing functional components cannot be sufficiently retained, and the tip of the discharge pin member has an appropriate roundness. If it is.

  Since the water absorption characteristics of water differ depending on the material and structure of the porous body or fiber molded body, the discharge performance of the porous body or fiber molded body is determined by measuring the amount of water taken up per hour. The release performance is determined by the water absorption rate per hour of the porous body or fiber molded body, and the water absorption rate is suitable for any material in the range of 30 to 100%. 30 to 80% is preferable for ceramic materials, 10 to 60% is preferable for metal materials, and 70 to 110% is preferable for synthetic resin materials and natural resin materials. The water absorption rate refers to the percentage of the total amount of water contained in the saturated porous body or fiber molded body relative to the mass of the absolutely dry porous body or fiber molded body.

  As the conductive material of the present invention, any substance having conductivity can be used. For example, a conductive material such as metal, metal oxide, metal fine powder or dispersion of conductive material such as carbon, conductive polymer, metal fiber, and carbon fiber can be used. Examples of the conductive material carried on the discharge pin member main body include a conductive graphite compounding material. The conductive graphite compounding material of the present invention refers to a conductive material containing conductive graphite. The conductive material is not limited to this, and a conductive material such as polyaniline or polyacetylene may be coated, and a conductive material such as metal is included in the discharge pin member body made of a porous body or a fibrous body. May be. Furthermore, the conductive material may be carried on the discharge pin member main body by weaving conductive metal fibers in the discharge pin member main body.

  The conductive graphite compounding material is applied to the discharge pin member main body by the following procedure. First, as a conductive graphite compounding material, a conductive graphite adjusting liquid is prepared by blending three kinds of solutions: a graphite paste, a binder Z850 that is an acrylic emulsion, and a diluent that is a surfactant. The graphite paste refers to a paste-like solution in which conductive graphite fine particles are dispersed as a protective film with EDTA as a surfactant. Examples of the surfactant include anionic, nonionic, and cationic surfactants, but are not particularly limited. A conductive graphite adjusting liquid is prepared by mixing these three kinds of solutions.

  The discharge pin member body is immersed for about 1 minute in the conductive graphite adjustment liquid prepared as described above, dried at room temperature for about 1 hour, and then dried for 3 hours or more in a dryer set at 80 ° C. A pin member is obtained. Moreover, you may apply | coat an electroconductive graphite compounding material by spraying electroconductive graphite adjustment liquid on a discharge | release pin member main body. Here, since water is absorbed by the capillary phenomenon from the lower surface portion of the discharge pin member projecting from the water retention portion, the conductive graphite compounding material needs to be peeled off. The peeling method is not particularly limited, but can be easily peeled off by previously covering the lower surface with a masking tape or the like.

  The discharge pin member coated with conductive graphite compound material emits a large amount of mist to the outside without applying a higher voltage than necessary because the electrical resistance value is significantly lower than that of the uncoated pin member. It becomes possible to do. Further, since the oxidation reaction does not occur on the surface of the conductive graphite compounding material, the discharge pin member is not clogged with the oxide, and the electrostatic atomization can be stably performed without maintenance for a long period of time. The relationship between the electrical resistance value and the amount of mist generated will be described in detail in the examples described later.

  In order to support the conductive material in the discharge pin member body, the conductive graphite compounding material is supported in the material when the discharge pin member body is formed, and the conductive graphite compounding material is contained in the discharge pin member body. Also good.

  The water retaining portion for projecting the completed discharge pin member is a porous body formed by combining one or more of ceramic material, metal material, synthetic resin material, and natural resin material, like the discharge pin member main body. Or it consists of a fiber molded object, and a shape is not specifically limited. In addition to the porous body or the fiber molded body, a honeycomb structure, a corrugated structure, a pipe shape, a sheet shape, a pleated shape, and the like may be used as long as the structure has excellent water absorption and water retention. In addition, since the water retention part has lower water absorption and retention than the discharge pin member, the water absorbed in the water retention material is sucked up to the discharge pin member without being retained in the water retention material, and the mist is discharged to the outside. be able to.

  The application electrode that applies a high voltage to the discharge pin member is a power source that generates a DC negative voltage of, for example, about 4 to 10 kV, and its negative electrode is connected to the water retention material via a conductive wire and includes water or a functional component. The water retaining material that holds the aqueous solution is negatively charged. By connecting the negative electrode of the application electrode to the water retention material, the current flows in search of the place where it is most likely to be discharged, and normally, using the property of gathering in a place where the tip is sharp or a place excellent in electrical conductivity such as metal, It will be gathered into the discharge pin member. In this way, by applying a high voltage to the discharge pin member, mist can be discharged from the discharge pin member to the outside by a natural discharge phenomenon. Note that the positive electrode of the application electrode may be connected to a water retention material to impart a positive charge.

  The water storage unit stores a functional aqueous solution containing a functional component, and always supplies an aqueous solution containing the functional component to the water retaining material using a capillary phenomenon or the like. Although the capacity | capacitance, a shape, etc. of a water storage part are not specifically limited, It is preferable to select suitably according to required mist discharge | release amount.

  As functional components of the functional aqueous solution stored in the water reservoir, vitamin C (L-ascorbic acid), vitamin C ester ((magnesium L-ascorbate phosphate, sodium L-ascorbate phosphate, magnesium ascorbate phosphate) Etc.), vitamin A, vitamin B, vitamin D, vitamin Dα-riboic acid, amino acid, tea extract (catechin, tannin, saponin, theanine, caffeine, etc.), hyaluronic acid, collagen, aroma essential oil (lavender, rosemary, Lemongrass, tea tree, sage, clove, orange, grapefruit, cinnamon, jasmine, etc.), coffee beans, tea confectionery, wasabi, hinokitiol, chitin, chitosan, propolis, etc., and other inorganic substances (inorganic System soluble component) Or include salt. Further, it is possible to platinum nanoparticles, also palladium nanoparticles such use.

  Here, “functionality” means a property that makes the living environment comfortable and can improve health, deodorization (deodorization, decomposition, etc.), antimicrobial (antibacterial, bactericidal, bacteriostatic, antibacterial) It means having at least one kind of properties such as moldability, antiviral properties, relaxation properties, moisturizing properties, antioxidant properties, harmful small organism repellent properties, static electricity suppressing properties, dustproof properties, and the like.

  Hereinafter, embodiments of the discharge pin member of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic view showing an embodiment of an electrostatic atomizer 10 according to the present invention. In the figure, an electrostatic atomizer 10 includes a water storage unit 12, a water retention unit 13 that absorbs water from the water storage unit 12 and retains water, and a discharge pin member 11 that discharges mist protruding from the water retention unit 13 to the outside. And an application electrode 14 for applying a high voltage to the discharge pin member 11. Among these, the discharge pin member 11 protrudes from the water retention portion 13, is connected to the negative electrode 15 from the application electrode 14, sucks up the water 16 containing the functional component held in the water retention portion 13, and mists from the tip end portion 11 a. It plays a role of releasing 17 to the outside.

  FIG. 2 is a cross-sectional view of the discharge pin member main body 20 made of the porous body 18 or the fiber molded body 19. As shown in FIGS. 2A and 2B, the porous body 18 or the fiber molded body 19 is formed by combining one or more of ceramic material, metal material, synthetic resin material, and natural resin material. The

  3 and 4 are explanatory views showing a process of applying the conductive material 21 to the discharge pin member main body 20. The discharge pin member 11 is formed by supporting a conductive material 21 on a discharge pin member main body 20 formed from a porous body 18 or a fiber molded body 19. A graphite paste is produced using conductive graphite fine particles as the conductive material 21. The graphite paste is a black viscous paste aqueous solution in which conductive graphite fine particles are dispersed using a surfactant as a protective film, and flaky graphite fine particles, EDTA (surfactant), and distilled water are 20.0 wt%: 1. 9 weight%: It mix | blends in the ratio of 78.1 weight%. The produced graphite paste is blended together with the binder Z850 which is an acrylic emulsion and the diluent which is a surfactant to produce a conductive graphite adjusting solution. The discharge pin member main body 20 is immersed in the produced conductive graphite adjusting liquid for about 1 minute, dried at room temperature for about 1 hour, and then dried in a dryer set at 80 ° C. for 3 hours or more, thereby releasing the discharge pin member 11. Get. Alternatively, the conductive graphite blending material may be applied by spraying the conductive graphite adjusting liquid onto the discharge pin member main body 20. Here, since the water absorption is performed by the capillary phenomenon from the lower surface portion of the discharge pin member 11 protruding from the water retention portion 13, the conductive graphite compounding material needs to be peeled off. The peeling method is not particularly limited, but can be easily peeled off by previously covering the lower surface with a masking tape or the like.

  FIG. 5 shows the shape of the discharge pin member 11. Examples of the shape of the discharge pin member 11 include those in which a ceramic material or the like is formed as a rod-shaped body. The discharge pin member tip portion 11a has an acute-pointed shape as shown in (a), and a flat surface as shown in (b). It is preferable to have a rounded curved surface shape as shown in FIG. This is because when the shape is sharp and sharp, the current does not reach the tip 11a of the discharge pin member, and the water 16 containing the functional component cannot be sufficiently retained, which is not preferable. Any shape having roundness may be used.

  Using the formed release pin member 11, the electrical resistance value, water absorption rate, mist generation amount, and sterilization effect were measured as follows. The release pin member 11 is formed of a fiber molded body 19 made of polyester fiber, and has a maximum diameter of 4.5 mm and a length of 30 mm. The applied voltage was 6 kV.

(Electrical resistance measurement)
Table 1 shows the details of the conductive material 21 in which the conductive graphite blending ratio (hereinafter referred to as “blending ratio” and the unit is weight%) is changed, and Table 2 and FIG. The change of the electrical resistance value is shown. The electrical resistance value was measured using a simple tester.

  It was shown that the electrical resistance value decreases because the conductivity increases as the blending ratio increases.

(Measurement of water absorption)
A small amount of water was put into a container, water was contained in a pre-perforated water absorbing sheet, and after the discharge pin member 11 was projected thereon, the time for water to reach the discharge pin member tip 11a was measured. Table 3 shows the result of the suction time of the discharge pin member 11 according to the blending ratio.

  It was shown that the higher the blending rate, the lower the water absorption rate, but it was confirmed that there was no significant difference between the blending rate of 5% and 25%.

(Measurement of mist generation)
Discharge pin members 11 having different electric resistance values were prepared, and the amount of mist generated from the discharge pin member 11 was measured using an ion counter 22. As shown in FIG. 7, the humidifier 23 is installed in the sealed space, the application electrode 14 is connected to the discharge pin member 11, and generated from the discharge pin member 11 by the ion counter 22 that is about 10 mm away from the discharge pin member 11. Mist release amount (negative ion amount) was measured. The measurement conditions are as follows.
Measurement environment Air temperature 25 ± 2 ℃, Humidity 55 ± 5%
Measurement time 1 hour ion counter KST-900 (Kobe Aeon Shokai)

  As shown in Table 4 and FIG. 8, it was confirmed that when the electric resistance value was 10 kΩ or more, the amount of mist emission decreased rapidly. Therefore, it is preferable that the discharge pin member 11 is manufactured so that the electric resistance value does not exceed 10 kΩ.

  The above description is an embodiment according to the present invention, but the technical scope of the present invention is not limited to the scope described in the above embodiment, and various technical changes or modifications are made to the above embodiment. It will be apparent to those skilled in the art that embodiments obtained by making improvements also belong to the technical scope of the present invention.

  The present invention relates to a discharge pin member capable of discharging a large amount of mist to the outside without applying an unnecessarily high voltage in an electrostatic atomizer that discharges mist containing a functional component to the outside, and the same An electrostatic atomizer using the above is provided. According to the present invention, it is possible to discharge a large amount of mist without applying an unnecessarily high voltage by supporting the conductive material on the discharge pin member body, and at the same time, using a mist containing a functional component. Since the sterilization effect is improved, the industrial applicability is very high.

DESCRIPTION OF SYMBOLS 10 Electrostatic atomizer 11 Discharge pin member 11a Tip part 12 Water storage part 13 Water holding part 14 Application electrode 15 Negative electrode 16 Water 17 Mist 18 Porous body 19 Fiber molding body 20 Release pin member main body 21 Conductive material 22 Ion counter 23 Humidification 24 Medium 25 Air Purifier

Claims (6)

A member used in an electrostatic atomizer that discharges mist containing functional components to the outside,
A discharge pin member body and a conductive material;
The discharge pin member main body is made of a porous body or a fiber molded body,
The conductive material is composed of conductive graphite compounding material,
The discharge pin member main body is loaded with the conductive material so that the electrical resistance value of the discharge pin member is 0.5 kΩ or more and does not exceed 10 kΩ,
A discharge pin member characterized in that the conductive graphite compounding material is not coated on a lower surface portion projecting on a water retention portion provided in an electrostatic atomizer used. In the discharge pin member body,
The discharge pin member according to claim 1, wherein the conductive material is supported by applying the conductive material to the surface. In the discharge pin member body,
The discharge pin member according to claim 1, wherein conductivity is supported by containing a conductive material therein. The porous body or the fiber molded body is formed by combining one or more of ceramic material, metal material, synthetic resin material, and natural resin material. A discharge pin member according to claim 1. The discharge pin member according to any one of claims 1 to 4, wherein the conductive graphite compounding material has a conductive graphite compounding ratio of 5 to 25% by weight. A water reservoir,
A water retention part that absorbs water from the water storage part and holds the water;
A discharge pin member that discharges the mist projecting from the water retaining portion to the outside;
The electrostatic atomizer using the discharge | release pin member in any one of Claim 1-5 provided with the application electrode which applies a high voltage to a discharge | release pin member.