WO2012093542A1

WO2012093542A1 - Electrostatic atomization device

Info

Publication number: WO2012093542A1
Application number: PCT/JP2011/078264
Authority: WO
Inventors: 矢野　武志; 須川　晃秀
Original assignee: パナソニック株式会社
Priority date: 2011-01-07
Filing date: 2011-12-07
Publication date: 2012-07-12
Also published as: JP2012143680A

Abstract

An electrostatic atomization device includes an ejection port that ejects electrically charged water particles, and an introduction tube having the upstream end thereof connected to the ejection port, wherein the introduction tube has, in the middle of the flow path thereof, a bellows structure in which small-diameter parts and large-diameter parts are arranged contiguously in an alternating manner. The bellows structure is formed in a manner such that the inner diameters of the respective small-diameter parts become sequentially larger the more downstream of the introduction tube the small-diameter parts are located.

Description

Electrostatic atomizer

The present invention relates to an electrostatic atomizer capable of discharging charged fine particle water.

An electrostatic atomizer capable of generating charged fine particle water by an electrostatic atomization phenomenon and releasing it toward a target location is conventionally known. The charged fine particle water has a small diameter and contains radicals, and exhibits a deodorizing effect on odors adhering to fabrics, an inhibitory effect on viruses and fungi, an inhibitory effect on allelic substances, etc. (Japanese Patent) Application publication number 2010-89088 (hereinafter referred to as “Document 1”).

¡Once this charged fine particle water is released into the external space, it may adhere to other members and disappear before reaching the target location. In that case, the effect of charged fine particle water cannot be sufficiently obtained at the target location. Therefore, in order to efficiently supply the charged fine particle water to the target location, the introduction pipe is connected from the location where the charged fine particle water is generated to the target location.

When the downstream end of the introduction pipe is connected to the target location by fitting or the like, there is a problem that the connection is not easy depending on the position and structure of the target location, and misalignment is likely to occur.

Therefore, the present inventors first considered providing a bellows structure in the middle of the flow path of the introduction pipe. However, in this case, there is a problem that the flow of air in the introduction pipe is likely to be disturbed in the portion of the bellows structure, and as a result, the amount of charged fine particle water supplied to the target location through the introduction pipe is reduced.

The present invention has been invented in view of the above-mentioned problems, and can easily connect the introduction tube to the target location without displacement, and the charged fine particle water can be efficiently supplied to the target location through the introduction tube. It is an object to provide an electrostatic atomizer that can be supplied with

The electrostatic atomization device of the present invention for solving the above-described problems includes a discharge electrode (1), water supply means (2) configured to supply water to the discharge electrode (1), and a voltage. Voltage application means configured to electrostatically atomize the water supplied to the discharge electrode (1) by being applied to the discharge electrode (1), and charged fine particle water generated by electrostatic atomization And an introduction pipe (11) having an upstream end connected to the discharge port (10). The introduction pipe (11) has a bellows structure in which a first portion (12) having a peripheral portion recessed in the radial direction and a second portion (13) having a peripheral portion extending in the radial direction are alternately arranged. Have on the way. The bellows structure is such that the inner diameter of each of the plurality of first portions (12) increases in order as each of the plurality of first portions (12) is positioned more downstream of the introduction pipe (11). Is formed.

In one embodiment, the introduction pipe has a downstream end connected to the air passage of the air conditioner, and is provided so as to discharge the charged fine particle water to the external space by being fed by the air blow of the air conditioner. .

The present invention has an effect that the introduction tube can be easily connected to the target location without being displaced, and charged fine particle water can be supplied to the target location with high efficiency through the introduction tube.

Preferred embodiments of the invention are described in further detail. Other features and advantages of the present invention will be better understood with reference to the following detailed description and accompanying drawings.
It is a fragmentary sectional view of the electrostatic atomizer of one embodiment of the present invention. It is a side view of the electrostatic atomizer of one Embodiment. It is principal part sectional drawing of the electrostatic atomizer of one Embodiment. 4A is a partial cross-sectional view of an electrostatic atomizer of a comparative example, and FIG. 4B is an enlarged view of a main part of FIG. 4A. It is a graph which shows the experimental result of one Embodiment and a comparative example. It is a perspective view which shows the example of installation of the electrostatic atomizer of one Embodiment.

1 to 3 show an electrostatic atomizer according to an embodiment of the present invention. In addition, since the basic structure of an electrostatic atomizer is well-known by the above-mentioned literature 1, etc., below, only a simple description is only given about a basic structure.

The electrostatic atomizer of this embodiment includes a columnar discharge electrode 1 as shown in FIG. 3 in a box-shaped housing 8 and water supply means 2 configured to supply water to the discharge electrode 1. And a voltage applying means 3 configured to electrostatically atomize water supplied to the discharge electrode 1 by applying a voltage to the discharge electrode 1.

The water supply means 2 includes a cooling device 4 configured to generate condensed water on the surface of the discharge electrode 1 by cooling the discharge electrode 1. The cooling device 4 cools the discharge electrode 1 using a plurality of Peltier elements, but may have other configurations as long as the discharge electrode 1 can be cooled. Further, the water supply means 2 may be configured to supply water from other locations such as a water tank to the discharge electrode 1.

As the voltage applying means 3, an annular counter electrode 6 is disposed at a position facing the tip of the discharge electrode 1, and both electrodes 1, 6 are applied so that a predetermined voltage is applied between the counter electrode 6 and the discharge electrode 1. A voltage application unit 7 is connected between them. By applying a predetermined high voltage to the discharge electrode 1 in a state where water is supplied by the voltage application unit 7, negative charges are concentrated on the water held by the discharge electrode 1, and the nanometer is caused by the electrostatic atomization phenomenon. Generate charged fine particle water of a size. Here, the voltage applying unit 3 may be configured so that electrostatic atomization can be caused by voltage application and the counter electrode 6 is not disposed.

The charged fine particle water generated at the tip portion of the discharge electrode 1 is discharged through the central hole of the counter electrode 6 (see arrow a in FIG. 3). A discharge cylinder 9 through which the charged fine particle water that has passed through the counter electrode 6 passes is formed on one side surface of the housing 8, and the opening of the discharge cylinder 9 discharges the charged fine particle water to the outside of the housing 8. 10 (see FIG. 1).

The electrostatic atomizer of this embodiment further includes an introduction tube 11. One end (upstream end) of the introduction tube 11 is fitted into the discharge tube 9, and the discharge port 10 at the tip of the discharge tube 9 communicates with one end (upstream end) of the introduction tube 11 by this fitting. Connected.

The introduction tube 11 is made of a flexible material such as rubber and is provided so as to be bent as a whole. Furthermore, a bellows structure 14 is provided in the middle of the flow path of the introduction pipe 11 in which a first portion having a peripheral portion that is recessed in the radial direction and a second portion having a peripheral portion that extends in the radial direction are alternately formed. ing. In the present embodiment, the peripheral portions of the first and second portions are circular when viewed from the axial direction of the introduction pipe 11. Specifically, each inner peripheral edge of the plurality of first parts is circular, and each outer peripheral edge of the plurality of second parts is circular. Hereinafter, the first portion and the second portion are referred to as a small diameter portion 12 and a large diameter portion 13, respectively. Further, in the introduction pipe 11, a part upstream of the bellows structure 14 is denoted as “upstream pipe part”, and a part downstream of the bellows structure 14 is denoted as “downstream pipe part”.

The upstream pipe part 15 and the downstream pipe part 16 are both circular and are provided so that the inner diameter r3 of the downstream pipe part 16 is larger than the inner diameter r1 of the upstream pipe part 15. As shown in FIG. 1, in the bellows structure 14, a large diameter portion 13 is continuously extended from the downstream end of the upstream pipe portion 15, and the small diameter portion 12, the large diameter portion 13, and the small diameter portion 12 are extended from the large diameter portion 13. ,... Are alternately formed, and downstream pipe portions 16 are continuously extended from the large-diameter portion 13 at the most downstream side. Here, the large-diameter portion (first large-diameter portion) 13 extending in series from the downstream end of the upstream pipe portion 15 has a vertical cross section of a V or U-shaped convex portion, and the large-diameter portion (first The small-diameter portion (first small-diameter portion) 12 formed from the first large-diameter portion) 13 has a vertical cross-section of a V-shaped or U-shaped recess, and the connection between the first large-diameter portion and the first small-diameter portion. The part is a shared part. Similarly, a large-diameter portion (n-th large-diameter portion) 13 formed in series from the upstream end of the downstream pipe portion 16 has a vertical cross section of a V or U-shaped convex portion, and the large-diameter portion (n-th n-th portion). Small-diameter portion (nth small-diameter portion) 12 formed of a vertical section of a V-shaped or U-shaped recess, and a connecting portion between the n-th large-diameter portion and the n-th small-diameter portion Is a shared part.

In the introduction pipe 11 of the present embodiment, the inner diameters r2a, r2b, r2c of the plurality of (for example, three) small-diameter portions 12 forming the bellows structure 14 are all larger than the inner diameter r1 of the upstream pipe section 15, and The downstream pipe portion 16 is smaller than the inner diameter r3. Furthermore, among the inner diameters r2a, r2b, r2c of the plurality (three) of the small diameter portions 12, the smaller diameter portion 12 located on the downstream side is set to have a larger inner diameter.

That is, the dimensional relationship of the introduction pipe 11 is r1 <r2a <r2b <r2c <r3. Therefore, as indicated by a one-dot chain line in FIG. 1, the downstream end of the upstream pipe portion 15, the plurality (three) of small diameter portions 12, and the upstream end of the downstream pipe portion 16 are centered on the axis of the bellows structure 14. Is substantially positioned on the outer peripheral surface of the truncated cone shape that is virtually assumed. In short, the large-diameter portion (first large-diameter portion) 13 extends from the downstream end of the upstream pipe portion 15 in the radial direction, and includes a circumferential portion extending in the radial direction. A large-diameter portion (n-th large-diameter portion) 13 is extended in the radial direction from the upstream end of the rim and includes a peripheral portion. The at least one small-diameter portion 12 between the large-diameter portions is a virtual cone between the downstream end of the upstream pipe portion 15 and the upstream end of the downstream pipe portion 16 from the peripheral portions of the large-diameter portions on both sides. A peripheral portion formed so as to be recessed to the peripheral surface of the table and recessed in the radial direction is provided.

Because of this dimensional relationship, the charged fine particle water transported through the introduction pipe 11 is efficiently transported to the target location while being suppressed as much as possible in the middle of the flow path. This is because the turbulence of the air in the bellows structure 14 is unlikely to occur in the introduction tube 11 of the present embodiment, so that the charged fine particle water does not adhere to the inner wall of the introduction tube 11 in the middle of the flow path and is easily transported. Because.

In this regard, FIG. 4 shows an electrostatic atomizer of a comparative example, and FIG. 5 shows experimental results of the electrostatic atomizer of this comparative example and the electrostatic atomizer of this embodiment. Show.

In the electrostatic atomizer of the comparative example shown in FIG. 4, only the dimensional relationship of the introduction tube 11 having the bellows structure 14 is provided so as to be different from the electrostatic atomizer of this embodiment. Specifically, the inner diameters r2a, r2b, r2c of a plurality (three in the example of FIG. 4) of the small diameter portions 12 are the same. The same inner diameters r2a, r2b, and r2c are provided smaller than the inner diameters r1 and r3 of the upstream pipe portion 15 and the downstream pipe portion 16. That is, the dimensional relationship of the introduction pipe 11 in the comparative example is r2a = r2b = r2c <r1 = r3.

FIG. 5 shows the number of charged fine particle water particles discharged from the main body of the electrostatic atomizer (that is, the number of charged fine particle water particles discharged from the discharge port 10 of the housing 8). The number of charged fine particle water particles discharged to the target location through the introduction tube 11 and the number of charged fine particle water particles discharged to the target location through the introduction tube 11 of the comparative example are shown. The introduction pipe 11 of this embodiment and the introduction pipe 11 of the comparative example both have a total length of 250 mm.

From the results shown in the figure, when the inner diameters r2a, r2b, r2c of the plurality of small-diameter portions 12 are made the same and smaller than the inner diameter r1 of the upstream pipe portion 15 as in the comparative example, the stage is discharged from the discharge port 10. It can be seen that the charged fine particle water can be transported to the target location only with a significantly reduced number of particles.

Similarly, from the results shown in the figure, when the inner diameters r2a, r2b, r2c of the plurality of small-diameter portions 12 are set as in the present embodiment, particles with a reduced width from the stage of discharge from the discharge port 10 are suppressed as much as possible. From the figure, it can be seen that the charged fine particle water can be conveyed to the target location.

This is because the presence of the small-diameter portion 12 tends to cause turbulence in the air, as indicated by the arrow b in FIG. 4B. The charged fine particle water having a nanometer-sized minute diameter is easily affected by the disturbance. Therefore, when the air in the introduction pipe 11 is disturbed, the rate of adhering to the inner wall of the introduction pipe 11 and disappearing increases. In addition, the portion where the charged fine particle water adheres is negatively charged, and this negatively charged portion works to inhibit the flow of the negatively charged charged fine particle water. Since these act synergistically, in the introduction pipe 11 of the comparative example, it is considered that the number of charged fine particle water particles is greatly reduced before reaching the target location.

On the other hand, in the introduction pipe 11 of the present embodiment, the bellows structure 14 exists in the middle of the flow path, but the bellows structure 14 is provided so that the diameter of the small diameter portion 12 gradually increases as it moves downstream. ing. Therefore, the air flow in and around the bellows structure 14 is smooth, and the occurrence of turbulence in the air in the introduction pipe 11 is minimized. As described above, charged fine particle water having a nanometer-sized minute diameter is easily affected by disturbance, but in this embodiment, this disturbance is suppressed as much as possible, and the number of charged fine particle water particles at the time of reaching the target location is reduced. The amount of decrease is minimized.

FIG. 6 shows an example in which the air passage 20 of the air conditioner is selected as the target location for transporting the charged fine particle water. The air passage 20 is a conduit for sending air after being air-conditioned by the air conditioner body (not shown) to the external space. The downstream end of the introduction pipe 11 is positioned in the air passage 20, and Charged particulate water is supplied into the air passage 20 through the downstream end opening. Thereby, it becomes possible to discharge the charged fine particle water to the outside space vigorously in the air blow of the air conditioner. Even if the target location for transporting the charged fine particle water is another location, if the flexibility and stretchability of the bellows structure 14 are effectively utilized, the introduction tube 11 can be easily connected without misalignment. .

As described above, the electrostatic atomizer of the present embodiment applies the discharge electrode 1, the water supply means 2 configured to supply water to the discharge electrode 1, and the voltage to the discharge electrode 1. The voltage applying means 3 configured to electrostatically atomize the water supplied to the discharge electrode 1, the discharge port 10 for discharging charged fine particle water generated by electrostatic atomization, and the discharge port 10 And an introduction pipe 11 having an upstream end connected thereto. The introduction tube 11 has a bellows structure 14 in which small-diameter portions 12 and large-diameter portions 13 are alternately continued in the middle of the flow path. The bellows structure 14 is formed such that the inner diameters (r2a, r2b, r2c) of the plurality of small-diameter portions 12 increase in order as each of the plurality of small-diameter portions 12 is positioned further downstream of the introduction pipe 11. ing. Thereby, in the electrostatic atomizer of this embodiment, the introductory pipe | tube 11 can be simply connected to a target location, without misalignment, effectively utilizing the flexibility and stretchability in the bellows structure 14. Moreover, in spite of having the bellows structure 14, the air flow in the introduction pipe 11 is hardly disturbed. Therefore, the charged fine particle water can be supplied to the target location through the introduction pipe 11 with high efficiency.

In addition, in the example shown in FIG. 6, the introduction pipe 11 has a downstream end connected to the air passage 20 of the air conditioner, and discharges charged fine particle water to the external space by being put on the air blow of the air conditioner. Provided. Thereby, the electrostatic atomizer main body is provided in a place different from the air conditioner main body, and the charged fine particle water sent from the electrostatic atomizer main body through the introduction pipe 11 with high efficiency is used as the wind of the air conditioner. It can be sent to the outside space vigorously.

As mentioned above, although this invention was demonstrated based on embodiment shown to an accompanying drawing, this invention is not limited to embodiment of each said example, If it is in the range which this invention intends, in each example suitably It is possible to change the design of the above and to apply a combination of the configurations of the examples as appropriate.

Claims

A discharge electrode;
Water supply means configured to supply water to the discharge electrode;
Voltage application means configured to electrostatically atomize the water supplied to the discharge electrode by applying a voltage to the discharge electrode;
A discharge port for discharging charged fine particle water generated by electrostatic atomization;
An inlet pipe having an upstream end connected to the discharge port,
The introduction pipe has a bellows structure in the middle of the flow path, in which a first portion having a peripheral portion recessed in the radial direction and a second portion having a peripheral portion extending in the radial direction are alternately continued,
The bellows structure is formed such that the inner diameters of the plurality of first portions increase in order as each of the plurality of first portions is located downstream of the introduction pipe. Electrostatic atomizer.
The introduction pipe has a downstream end connected to an air passage of an air conditioner, and is provided so as to discharge the charged fine particle water to an external space by being put on the air of the air conditioner. The electrostatic atomizer of Claim 1.