JP4195990B2 - Electrostatic atomizer and air cleaner using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrostatic atomizer for spraying water around and an air cleaner using the same.
[0002]
[Prior art]
Conventionally, electrostatic atomizers using the phenomenon that water is atomized when a high voltage is applied to the liquid and the liquid is exposed during electrolysis are used in air cleaners and deodorizers. (For example, Patent Document 1).
[0003]
As the air purifier, for example, a transport unit that transports water from a water reservoir, a cylindrical counter electrode unit that is disposed on the transport direction side of the transport unit and faces the transport unit, and a transport unit from the water reservoir One having an application electrode capable of applying a voltage to water in a path leading to the tip of the counter electrode part side and a voltage application part applying a high voltage between the application electrode and the counter electrode part is known.
[0004]
However, since the counter electrode part is formed in a cylindrical shape, the charged mist atomized from the transport part is almost adsorbed by the counter electrode and is not released to the outside, resulting in a decrease in the amount of atomization. It was. For this reason, the discharge current which flows between an application electrode and a counter electrode becomes large, and the problem that ozone concentration becomes high also arises.
[0005]
In addition to the above, there is an atomizing device that is not provided with a counter electrode. In this case, the discharge current is not stable, and the amount of atomization cannot be stabilized.
[0006]
[Patent Document 1]
JP 2001-286546 A [0007]
[Problems to be solved by the invention]
The present invention has been made in view of the above points. The object of the present invention is not only to stabilize the atomization amount, but also to increase the atomization amount and suppress the generation of ozone as much as possible. It is an object of the present invention to provide an electrostatic atomizer and an air cleaner using the same.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, an electrostatic atomizer according to the present invention includes a transport unit having water absorption for transporting water from a water reservoir, a transport unit on the transport direction side of the transport unit, and the transport unit. The opposing electrode part , the application electrode 2 that can apply a voltage to the water in the path from the water reservoir part to the tip of the conveying part on the opposite electrode part side, and the voltage that applies a high voltage between the application electrode 2 and the opposing electrode part The electrostatic atomizer having the application unit 14 includes a plurality of the transport units, a plurality of arc-shaped counter electrode units facing each of the transport units, and an adjacent arc-shaped counter electrode unit The corner portion 13 connecting the arc R and the arc R is formed in an arc shape that is convex on the opposite side to the counter electrode portion .
[0009]
By providing the counter electrode portion in this manner, the discharge current can be stabilized and the amount of atomization can be stabilized, and the counter electrode portion is formed in an arc shape so that the mist from the transport portion can be reduced. The charged mist can be easily released from the opening side of the arc R to the outside. Therefore, the amount of mist adsorbed on the counter electrode portion can be reduced and the atomization amount can be increased. It is possible to reduce the ozone concentration by reducing the discharge current flowing between the counter electrode portions .
[0010]
In addition, there are a plurality of transfer portions, a plurality of arc-shaped counter electrode portions facing each of the transfer portions, and a corner portion 13 connecting the arcs R and R of adjacent arc-shaped counter electrode portions. The formation of an abnormal discharge at the corner portion 13 can be prevented by forming it in an arc shape that is convex on the side opposite to the counter electrode portion .
[0011]
Also with claim 2 includes a fan 82 and a filter 81 for removing dust blower, characterized in that the electrostatic atomizing device 1 according to claim 1, wherein the downstream side of the fan 82 and filter 81 are arranged Is.
[0012]
As described above, the air cleaner is provided with the fan 82 for blowing and the filter 81 for dust removal, and the electrostatic atomizer 1 according to claim 1 is disposed on the downstream side of the fan 82 and the filter 81. The mist generated by the electrostatic atomization spreads on the air blown by the fan 82, so that the diffusibility is improved. As a result, the active species possessed by the mist cause odor components in the indoor air and the indoor wall surface. It is possible to effectively utilize the deodorizing function for the deposits. Further, since the air passing in the vicinity of the electrostatic atomizer 1 becomes normal air filtered by the filter 81, the electrostatic atomizer 1 is not contaminated, and electrostatic atomization is less likely to occur due to the dirt. Can be prevented.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. The electrostatic atomizer 1 shown in FIG. 3 is provided with a water tank 6 containing water to be atomized at the bottom, a holder 10 having a cylindrical shape and a vent hole 12 opened on the peripheral surface, A counter electrode 3 disposed on the upper part of the holder 10; an application electrode 2 that is fitted in the lower part of the holder 10 and applies a voltage to water; and a plurality of rod-shaped water absorbers 4 held by the application electrode 2; The ionization needle 5 is also held by the application electrode 2, and the voltage application unit 14 applies a high voltage between the application electrode 2 and the counter electrode 3 . That is, in this embodiment, the water tank 6 is used as a water reservoir, and the water absorbent 4 is used as a transport unit having water absorption for transporting water from the water reservoir.
[0014]
The water tank 6 formed in a cup shape as shown in FIG. 2 and the like is provided on the outer peripheral flange portion 21 of the application electrode 2 in which the protrusion 60 on the outer surface of the upper end opening edge is mounted on the lower portion of the holder 10. It is attached by engaging the bayonet in the engaging recess 29.
[0015]
The counter electrode 3 and the application electrode 2 are both made of a synthetic resin mixed with a conductive material such as carbon or a metal such as SUS, and have conductivity. As shown in FIG. The counter electrode 3 placed on the upper part of the electrode is grounded through a ground contact plate 71 that contacts the outer surface of the connecting projection 30 formed on the outer peripheral surface thereof. The applied electrode 2 that is fitted and fixed in the lower part of the holder 10 and is pressed and fixed by the rib 11 on the inner surface of the holder 10 is also applied with a voltage via a contact plate 72 that contacts the outer surface of the connecting projection 20 formed on the outer peripheral surface. It is connected to a high voltage generation source as the application unit 14.
[0016]
The rod-shaped water absorber 4 is made of porous ceramic having a porosity of 10 to 70%, and its upper end is pointed like a cone or a pyramid, and has a plurality of water absorbers in the illustrated example, six water absorbers. 4 is attached to the application electrode 2. These water absorbing bodies 4 are arranged at equal intervals on the same circle centering on the ionization needle 5 disposed in the center of the application electrode 2, the upper part projects upward from the application electrode 2, and the lower part projects downward. Contact with water in the water tank 6.
[0017]
In FIG. 3, reference numeral 22 denotes a cylindrical skirt that protrudes downward from the application electrode 2, and surrounds the outside of the plurality of water absorbent bodies 4, and its lower end is positioned below the lower end of the water absorbent body 4, A lattice-shaped lattice-shaped protective cover 17 is covered on the lower end opening. The skirt 22 in the application electrode 2 applies a high voltage to the water by making contact with the water contained in the water tank 6, and at the same time, protects the water absorbing body 4 formed of ceramic together with the lattice-shaped protective cover 17. Is to do.
[0018]
Here, when the water tank 6 is connected, the application electrode 2 substantially seals the upper surface opening of the water tank 6 so that the water in the water tank 6 does not leak even when tilted. Therefore, a slit 23 extending in the vertical direction of the skirt 22 is provided in a part of the skirt 22 in the circumferential direction, and the skirt 22 is surrounded by the slit 23 when the water tank 6 filled with water is mounted. The air in the space is evacuated to allow the inflow of water into the skirt 22.
[0019]
The counter electrode 3 mounted so as to close the upper surface opening of the holder 10 includes a plurality of counter electrode portions that are arranged on the transport direction side of the respective water absorbent bodies 4 and face each of the water absorbent bodies 4 as shown in FIG. Each counter electrode portion is formed in an arc shape, and the corner portion 13 connecting the arc R and the arc R of the adjacent arc-shaped counter electrode portions is convex on the opposite side to the convex direction of the arc R of the counter electrode portion. It is formed in an arc shape. More specifically, the counter electrode 3 has an opening 31 at the center, and the edge of the opening 31 has a plurality of same diameters centered on the needle-like portions at the upper ends of the water absorbent bodies 4 when viewed from above. The arc R is smoothly connected with another arc r, the arc R at the edge of the opening 31 is used as a counter electrode part , and the arc r is used as a corner part 13. The counter electrode 3 is grounded, a high voltage generating source is connected to the application electrode 2, and when the water absorption body 4 is sucking up water by capillary action, the needle-like portion at the upper end of the water absorption body 4 is on the application electrode 2 side. At the same time, the counter electrode portion (arc R) of the counter electrode 3 functions as a substantial electrode. The opening 31 is covered with the lattice-shaped protective cover 16, thereby preventing fingers and the like from coming into contact with the ionization needle 5 and the water absorption 5 through the opening 31.
[0020]
Now, a water tank 6 containing water is attached, and water is brought into contact with the skirt 22 of the application electrode 2. At the same time, the water absorption body 4 is sucked up by capillary action, and the counter electrode 3 is grounded and the application electrode. If a high voltage generating source is connected to 2 and a negative voltage is applied to the application electrode 2, if this voltage is a high voltage that can cause Rayleigh splitting in water, the needle-like shape at the upper end of the water absorber 4 The water that reaches the part is subjected to electrostatic atomization that causes Rayleigh splitting and atomization of a nanometer size particle diameter.
[0021]
Here, the shape of the counter electrode portion is an arc shape because the charged mist atomized from the water absorbent 4 is easily released to the outside from the opening side of the arc R, and thus the amount of mist adsorbed by the counter electrode 3 is reduced. This is because the amount of atomization can be increased by reducing the discharge current, and the discharge current flowing through the application electrode 2 and the counter electrode portion can be reduced thereby reducing the ozone concentration.
[0022]
Further, the corner portion 13 connecting the arc R and the arc R of the arcuate counter electrode portion is formed into an arc shape when the corner portion 13 has a pointed portion such as an edge from the tip of the water absorbing body 4 toward the corner portion 13. This is because there is a possibility of abnormal discharge, and the corner portion 13 is formed in an arc shape in this way, thereby preventing the abnormal discharge from occurring at the pointed portion.
[0023]
In the electrostatic atomizer 1, a high negative voltage is simultaneously applied to the ionization needle 5, and negative ions are generated by corona discharge with the counter electrode 3. At this time, if the distance between the electrodes is the same, the voltage required for electrostatic atomization is higher than the voltage required for generating negative ions. Electrostatic atomization is more likely to occur by making the distance L2 from the ionization needle 5 to the counter electrode 3 considerably longer than the distance L1 to the counter electrode 3. However, if the water in the water tank 6 disappears and the water held by the water absorbing body 4 is not atomized, only the negative ions are continuously generated.
[0024]
4 and 5 show an air cleaner 7 in which the electrostatic atomizer 1 is arranged. The air purifier 7 includes a blower including a blower fan 82 driven by a motor 83 and a wind tunnel 70, and a dust removal filter 81, and removes air sucked from a suction port 76 on the front surface. After filtering at 81, the air is discharged to the outside from the outlet 77. The electrostatic atomizer 1 is located in the air channel 70 in the blower in the air flow path from the downstream side of the fan 82 and the filter 81, that is, from the air inlet 76 to the air outlet 77 in the air cleaner 7. It is disposed in the vicinity of the outlet 77.
[0025]
Nano-size mist, which is a mist of nanometer-size particle diameter generated by electrostatic atomization, is originally highly diffusive, but it is more diffusible because it spreads on the air blown by the blower. Therefore, the deodorizing function for the odor components in the indoor air and the deposits on the indoor wall surface due to the active species possessed by the nano-size mist can be effectively utilized. In particular, in the example shown in the figure, when the electrostatic atomizer 1 is disposed in the housing recess 73 provided in a part of the wind tunnel 70, the contact between the contact plates 71 and 72 and the connecting projections 20 and 30 is prevented. A part of the wind flows into the inside of the electrostatic atomizer 1 through the opening 74 opened in the wall surface of the storage recess 73 and the ventilation hole 12 in the holder 10 of the electrostatic atomizer 1 to enable it. In addition, atomization is promoted to increase the amount of atomization, and mist is easily scattered on the wind.
[0026]
In addition, although the electrostatic atomizer 1 is arranged in the wind tunnel 70, the air passing through the vicinity of the electrostatic atomizer 1 is clean air filtered by the filter unit 81. The sizing apparatus 1 is not soiled, and a part of the wind enters the electrostatic filtration device 1 as described above, but the electrostatic atomization hardly occurs due to the soiling.
[0027]
【The invention's effect】
As described above, the electrostatic atomizer of the present invention can increase the amount of atomization, thereby reducing the discharge current flowing through the application electrode and the counter electrode, thereby reducing the ozone concentration. In addition, the corners that connect the arcs adjacent to each other in the arc-shaped counter electrode part are formed in an arc shape that protrudes on the opposite side of the counter electrode part, thereby preventing abnormal discharge at the corner part. it can.
[0028]
In addition, the air cleaner of the present invention has good diffusibility because the mist generated by electrostatic atomization spreads on the air blown by the fan, and the mist in the room air due to the active species that the mist has It is possible to effectively use the deodorizing function with respect to odor components and deposits on the indoor wall surface. In addition, since the air passing through the vicinity of the electrostatic atomizer is normal air filtered by a filter, the electrostatic atomizer is not contaminated and it is difficult to cause electrostatic atomization due to the contamination. it can.
[Brief description of the drawings]
FIG. 1 is a plan view of an electrostatic atomizer showing an example of an embodiment of the present invention.
FIG. 2 is a sectional view of the main body of the electrostatic atomizer.
FIG. 3 is an explanatory view showing a cross section of the electrostatic atomizer and electrical connection between the electrostatic atomizer body and the voltage application unit.
FIG. 4 is a rear cross-sectional view of an air cleaner equipped with the electrostatic atomizer of the same air cleaner.
FIG. 5 is a side cross-sectional view of an air cleaner equipped with the electrostatic atomizer of the same air cleaner.
[Explanation of symbols]
R Arc 1 Electrostatic atomizer 2 Applied electrode
3 Counter electrode 13 Corner portion 14 Voltage application portion

Claims (2)

A water-absorbing conveyance unit for conveying water from the water reservoir, a counter electrode unit disposed on the conveyance direction side of the conveyance unit and facing the conveyance unit, and a counter electrode unit side tip of the conveyance unit from the water reservoir In an electrostatic atomization apparatus having an application electrode capable of applying a voltage to water in a path leading to and a voltage application unit for applying a high voltage between the application electrode and the counter electrode unit, the electrostatic atomizer has a plurality of the above-mentioned transport units, An arc shape having a plurality of arc-shaped counter electrode portions facing each of the transport portions, and a corner portion connecting the arcs of adjacent arc-shaped counter electrode portions projecting to the opposite side of the counter electrode portion An electrostatic atomizer formed by forming an electrostatic atomizer. An air purifier comprising a fan for blowing air and a filter for dust removal, and the electrostatic atomizer according to claim 1 arranged on the downstream side of the fan and the filter.

Images