JP4305115B2 - Electrostatic atomizer - Google Patents

Description

  The present invention relates to an electrostatic atomizer for electrostatic atomizing a liquid such as water or aroma oil.

Conventionally, as an electrostatic atomizer, the liquid accumulated in the liquid reservoir is transported by capillary action in a transport section composed of a porous material, and a high voltage is applied between the liquid application electrode and the counter electrode by the voltage application section. Then, the liquid that is transported by the transport unit is known to be charged and atomized. (For example, see Patent Document 1)
In the conventional use of electrostatic atomization, water is charged and atomized and sprayed, and nano-sized mist with active species (hydroxy radical, superoxycide, etc.) attaches indoor air, indoor wall surface, etc. Kimono was deodorized. In that case, immediately after putting the liquid into the liquid reservoir, it took time until the conveying section sucked up the liquid in the liquid reservoir and atomized, so that quick atomization is desired.

  Here, when the deodorization in the space is periodically performed, if the liquid to be atomized is water, the transport section gets wet with water when used while the water is in the liquid reservoir, so the time until the atomization starts It takes a little time to start up, but if the user atomizes a liquid containing aroma oil or other agents in order to atomize the favorite fragrance every time, it should be put in the reservoir before each use. In this way, the liquid containing the desired agent is put into use, and in such a case where the liquid is put in the liquid reservoir before each use and atomized, the liquid is put in the liquid reservoir and the liquid is used. As described above, it takes a long time to start the atomization after being transported by the transport unit. In addition, since aroma oils are always vaporized or oxidized, they are rarely used continuously after use. In this respect as well, when electrostatically atomizing a liquid containing aroma oil or other agents, it is necessary to pour the liquid into the liquid reservoir before each use. Therefore, the liquid in the liquid reservoir is sucked up by the conveyor. It takes time to rise until it atomizes.

  Moreover, liquids with different viscosities, such as water and aroma oil, are transported by a transport section made of the same porous material. However, in the case of a porous material having pores with a diameter that causes capillary action suitable for water, There is a problem that the capillary phenomenon does not occur optimally in a liquid having a viscosity different from that of water, such as oil, and that good conveyance due to the capillary phenomenon is not possible.

For these reasons, there is a demand for an electrostatic atomizer capable of sucking and atomizing various types of liquids having different viscosities as soon as possible in the transport unit.
Japanese Patent No. 3260150

The present invention has been invented in view of the above-described conventional problems, and provides an electrostatic atomizer that can quickly suck up and atomize liquids having different viscosities in a liquid reservoir even by the same transport unit. This is a problem.

In order to solve the above-described problems, an electrostatic atomizer according to the present invention includes a liquid reservoir 1 for selecting an arbitrary liquid from a plurality of types of liquids having different viscosities, and a liquid stored in the liquid reservoir 1. From the transport unit 2 made of a porous material having a large number of small-diameter holes 8 transported from the reservoir 1, the counter electrode 3 disposed so as to face the liquid transport direction by the transport unit 2, and the liquid reservoir 1 A liquid application electrode 4 for applying a voltage to the liquid in the path leading to the front end of the transport unit 2 on the counter electrode side, and a voltage application unit 6 for applying a high voltage between the liquid application electrode 4 and the counter electrode 3 In the electrostatic atomizer having a large number of small-diameter holes 8 present in the transport unit 2 made of a porous material , each of the viscosity of a plurality of types of liquids having different viscosities that can be selectively placed in the liquid reservoir 1 a plurality of pore sizes in which the small-diameter hole 8 having a pore diameter of causing optimal capillary phenomenon are distributed together different Are classified into groups a group of plurality of is characterized in that it coexist in the conveying direction of the liquid in the transport section 2.

  With such a configuration, when the liquid 5 put in the liquid reservoir 1 is transported by the transport section 2 made of a porous material, the liquid 5 having different viscosity such as water and aroma oil is transported into the liquid reservoir 1. Since there is a group in which small-diameter holes having the optimum capillary diameter corresponding to the respective viscosities are gathered and distributed, there is a group in the liquid reservoir 1 according to preference. Various liquids 5 having different viscosities can be effectively and quickly transported and atomized by the same transport unit 2.

  In the present invention, when transporting the liquid contained in the liquid reservoir in the transport section made of a porous material, a large number of small diameter holes existing in the transport section made of the porous material are classified into a plurality of groups having different hole diameters. Even if liquids with different viscosities, such as water and aroma oil, are placed in the liquid reservoir according to preference, the plurality of groups can coexist in the liquid transport direction in the transport section. Can be transported quickly and atomized.

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

  As shown in FIG. 1 and FIG. 2, the electrostatic atomizer is a rod-shaped transport made of a liquid reservoir 1 and a plurality of porous materials immersed in a liquid 5 whose lower end is placed in the liquid reservoir 1. Part 2, the liquid application electrode 4 for holding the transfer part 2 and applying a voltage to the liquid 5, and the holding part 12 made of an insulator, and the plurality of rod-like transfer parts 2 It consists of a counter electrode 3 having a counter part facing the tip part, and a voltage application part 6 for applying a high voltage between the liquid application electrode 4 and the counter electrode 3. Both electrodes 4 are made of a synthetic resin mixed with a conductive material such as carbon or a metal such as SUS.

  The conveyance unit 2 is formed in a rod shape with a porous material such as porous ceramic or porous metal. Here, in the case of porous ceramic, for example, the particle diameter is preferably 2 to 500 μm, and the capillary is preferably 1 to 250 μm. The upper end of the rod-shaped transport unit 2 is a needle-like atomizing unit 9 that is pointed like a needle. A plurality of the rod-shaped conveyance units 2, in the illustrated example, six rod-shaped conveyance units 2 are attached to the liquid application electrode 4. The plurality of rod-shaped transport units 2 are arranged at equal intervals on a concentric circle centered on the center 10 of the liquid application electrode 4, and the upper part of each transport unit 2 projects above the liquid application electrode 4, The lower portion protrudes downward from the liquid application electrode 4 and comes into contact with the liquid 5 placed in the liquid reservoir 1.

  The counter electrode 3 has an opening 11 in the center, and the edge of the opening 11 has the same diameter centered on each needle-like atomizing section 9 at the upper end of the plurality of transport sections 2 when viewed from above. A plurality of arcs R are smoothly connected. The counter electrode 3 is grounded, the voltage application unit 6 is connected to the liquid application electrode 4 to apply a high voltage, and the transport unit 2 formed of a porous material is put in the liquid reservoir 1 by capillary action. When the liquid 5 is being sucked up, the needle-like atomizing section 9 at the upper end of the transport section 2 functions as a substantial electrode on the liquid application electrode 4 side, and the arc R of the counter electrode 3 functions as a substantial electrode. To do. As the voltage application part 6, what can give the electrolytic strength of 500 V / mm or more, for example, 700-1200 V / mm is preferable.

  Then, by applying a high voltage between the conveying unit 4 and the counter electrode 3 by the voltage applying unit 6, the liquid 5 at the tip of the conveying unit 4 is charged and atomized by the high voltage to generate nano-sized mist. The nano-sized mist generated in this manner contains active species, and the nano-sized mist containing the active species is, for example, nano-sized mist containing the active species when delivered into a room. Thus, it is possible to remove the deodorization of indoor air, the deodorization of indoor air, and the odor adhering to the wall surface of the room.

  Here, in the present invention, the structure of the transport unit 2 made of a porous material having a large number of small-diameter holes 8, particularly, the large-diameter holes 8 are arranged so that the distribution of the hole diameters is classified into a plurality of types. There is a special feature.

  That is, the transport unit 2 made of a rod-shaped porous material having a large number of small diameter holes 8 classifies the large number of small diameter holes 8 into a plurality of groups according to a plurality of hole diameters (that is, the same or almost the same diameter). The small diameter holes 8 distributed around a certain hole diameter are grouped together and classified into a plurality of groups having different hole diameters in this manner, and a plurality of types of groups having different hole diameters are arranged in the liquid transport direction in the transport section 2. They exist side by side (that is, a plurality of types of groups having different hole diameters are arranged so that positions of a plurality of types of holes having different hole diameters are aligned at different positions in the horizontal section).

  FIG. 3 shows an embodiment of a cross-sectional view of the rod-shaped transport unit 2 taken along line XX of FIG. 2. In the embodiment shown in FIG. 3, the transport unit 2 has a narrow hole 8 having a large hole diameter. From the group diameter (small diameter hole group A), the group of small diameter holes 8 having a small hole diameter (small diameter hole group C), and the diameter of the small diameter holes 8 belonging to the small diameter hole group A Are classified into three types of groups, that is, a group (small-diameter hole group B) of small-diameter holes 8 that are smaller and larger than the diameter of the small-diameter hole 8 belonging to the small-diameter hole group B. A group of small diameter holes A having a large diameter is arranged at the center of the conveying part 2 in the form of a rod having three kinds of groups having different hole diameters, and a group of small diameter holes B having a medium diameter are arranged on the outer periphery thereof. Further, a small-diameter hole group C having a small diameter is arranged on the outermost peripheral portion of the conveying portion 2 which is the outer peripheral portion thereof, and the diameter decreases as it goes outward from the center. It is arranged so as to be flops.

  As described above, a large number of small-diameter holes 8 existing in the transport unit 2 made of a porous material are classified into a plurality of groups having different hole diameters, and the plurality of groups are arranged side by side in the liquid transport direction in the transport unit 2. It is arranged.

  Of course, when a plurality of types of groups having different hole diameters coexist in the liquid transport direction in the transport unit 2, the present invention is not limited to the arrangement of FIG. 3 described above, but in a cross section in which the transport unit 2 is cut horizontally as shown in FIG. The small-diameter hole group C having a small diameter may be arranged so that the small-diameter hole group A having a large diameter and the small-diameter hole group B having a medium diameter are positioned in an island shape in FIG. As shown, from one side to the other side, from one side to the other side of the rod-shaped transport unit 2, the small-diameter hole group A, the small-diameter hole group C, and the small-diameter hole group B are used. It may be arranged so as to be a group having a smaller diameter.

  Further, the above grouping may be classified not only into the above three types but also into two types or four or more types.

  The diameters of the small-diameter holes 8 belonging to the respective small-diameter hole groups A, 8B, 8C... Correspond to the respective liquids 5 having different viscosities, such as water and aroma oil, and each liquid 5 is a capillary. It is set to the optimum capillary diameter for ascending. Therefore, when liquids 5 having different viscosities, such as water and aroma oil, enter the liquid reservoir 1, the small-diameter holes 8 having the optimum pore size corresponding to the respective viscous liquids 5 are combined into one pore. Since it exists as a group of holes, the liquids 5 having different viscosities can be effectively transported and atomized quickly by the same transport unit 2, so that even the liquids 5 having different viscosities can be collected. The start-up time until it is put into the part 1 and atomized can be shortened.

  As described above, a large number of small-diameter holes 8 existing in the transport unit 2 made of a porous material are classified into a plurality of groups having different hole diameters, and the plurality of groups coexist in the liquid transport direction in the transport unit 2. However, the hole diameter of the small-diameter hole 8 in each group is obtained as follows and set to an optimum hole diameter.

  That is, in the schematic diagram of FIG. 6, when the capillary diameter (m) is d, the height at which the liquid 5 ascends the capillary is h, and the contact angle is θ, the capillary diameter (m) d is as follows: It can be obtained by the mathematical formula shown in Equation 1.

In the numerical formula shown in the above equation 1, σ is the surface tension coefficient (N / m) of the liquid 5, g is the free fall acceleration, and ρ is the density (kg / m ³ ) of the liquid 5.

By the way, σ which is the surface tension coefficient (N / m) of the liquid 5 in the numerical formula shown in the above formula 1, the density (kg / m ³ ) ρ of the liquid 5 and θ which is the contact angle are the types of the liquid 5 to be used ( For example, the optimum capillary diameter d for the liquid 5 to rise by a certain height h for each type of liquid is determined by the mathematical formula shown in the above equation (1). It is something that can be done.

  Corresponding to the types of liquids 5 to be used in this way, the hole diameters of the respective small-diameter holes 8 in a plurality of groups (a plurality of small-diameter hole groups) classified and arranged in the transport unit 2 according to the hole diameters are the above numbers. Each is obtained by the mathematical formula shown in 1.

It is a disassembled perspective view of the electrostatic atomizer of this invention. It is a schematic block diagram same as the above. It is sectional drawing of the conveyance part in the XX line of FIG. It is sectional drawing of other embodiment of a conveyance part same as the above. It is sectional drawing of other embodiment of a conveyance part same as the above. It is a schematic diagram for calculating | requiring the diameter of a capillary tube.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid storage part 2 Conveying part 3 Counter electrode 4 Liquid application electrode 5 Liquid 6 Voltage application part 8 Narrow hole

Claims (1)

A liquid storage part for selecting an arbitrary liquid from a plurality of types of liquids having different viscosities, and a transport part made of a porous material having a large number of small-diameter holes for transporting the liquid stored in the liquid storage part from the liquid storage part; A counter electrode disposed so as to oppose the liquid transport direction by the transport unit, a liquid application electrode for applying a voltage to the liquid in the path from the liquid reservoir to the counter electrode side tip of the transport unit, and a liquid In an electrostatic atomizer having a voltage application unit that applies a high voltage between an application electrode and a counter electrode, a large number of small-diameter holes existing in a conveyance unit made of a porous material are selectively provided in a liquid reservoir. Are classified into a plurality of groups having different hole diameters, and the plurality of groups are divided into a plurality of groups having different diameters. That they coexist in the direction of liquid transport The electrostatic atomization device according to symptoms.

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