JPH02198650A - Electrostatic air cleaner - Google Patents

Abstract

PURPOSE:To attract dust on both a first and second dust collecting electrodes and to lower unevenly distributed attraction of dust by impressing different voltage to the first and second dust collecting electrodes. CONSTITUTION:An ionizing electrode 10, a first dust collecting electrode 11 and a second dust collecting electrode 12 are provided. Distance between the electrode 10 and the electrode 11 and distance between the electrode 11 and the electrode 12 are set smaller than distance between the electrode 10 and the electrode 12. Furthermore the potential of the electrode 11 is set between the potential of the electrode 10 and the potential of the electrode 12. In other words, since dust is dispersed and attracted on a plurality of dust collecting electrodes set at different potential, uneven distribution of dust is made little and stable dust collection is enabled.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an electrode for ionizing particles such as dust,
The present invention relates to an electrostatic air cleaning device equipped with t#l for adsorbing ionized particles.

[Prior Art] As shown in principle in Fig. 10 as an electrostatic air purifier, a linear #i #11 is used to ionize particles such as dust.
and a plate-shaped anode 2 for adsorbing ionized particles. Paste the dust collecting paper 3 so as to cover the dust collecting paper 3.
There are known methods that allow dust to adhere to the top.

Further, as shown in FIG. 11, a cathode 1 is placed at the center of a cylinder or cylindrical body 4, and an anode 2 is annularly provided on the outer peripheral surface of the cylinder or cylindrical body 4. There is also known a device that collects dust by pasting a dust collecting paper 3 on top of the dust collecting paper 3 in an annular shape.

In any electrostatic air purifier, the cathode 1 and the anode f
! When a high voltage is applied between cathode 1 and cathode 1, negative ions are generated by discharge near cathode 1, which collide with dust.
The dust becomes negatively charged and is attracted to the anode.

[Problems to be Solved by the Invention] Incidentally, the dust collection force of the anode 2 is strong at the portion closest to the negative electrode f#11, and becomes weaker as it moves away from the cathode 1, so that dust is unevenly attracted to the dust collection paper 3. This phenomenon cannot be solved even if the area of the anode 2 or the area of the dust collecting paper is increased. Uneven adsorption of dust is undesirable because it causes a change in the discharge current over time and an increase in the generation of ozone 03.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an electrostatic air cleaning device that can reduce uneven distribution of dust.

[Means for Solving the Problem] The present invention for achieving the above object includes an ionization electrode,
A first dust collection electrode and a second dust collection electrode are provided, and the distance between the ionization electrode and the first dust collection electrode and the distance between the first dust collection electrode and the second dust collection electrode are The distance between the ionization electrode and the second collection! ! It is set smaller than the distance to the electrode, and the first collection! ! The present invention relates to an electrostatic air cleaning device in which the potential of the electrode is set between the potential of the ionizing electrode and the potential of the second dust collecting electrode.

[Operation] Different voltages are applied to the first and second dust collecting electrodes according to the present invention. As a result, dust is attracted to both the first and second dust collectors ti, and uneven adsorption of dust can be reduced. Further, lines of electric force are generated from the ionization electrode toward the first and second dust collection electrodes, and lines of electric force are also generated from the first dust collection electrode toward the second dust collection electrode. and,
Ionic winds are generated due to these electric lines of force. As a result, the dust that was not adsorbed by the first am4Str moves toward the second dust collection electrode on the ion wind, and the second collection! It is adsorbed by one electrode.

[First Embodiment] Next, an electrostatic air cleaning device according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 4.

This electrostatic air cleaning device includes an ionizing electrode (cathode) 10 that is linear to facilitate corona discharge, and first and second dust collecting electrodes 11 and 12 that are plate shaped. Two electrodes 10, 11, and 12 are provided symmetrically. The ionization charge [rlQ is the pair of support parts 13.14
The first and second dust collection electrodes 11.12 are stretched between
is pasted on the surface 16 of the dust collecting paper container 15 made of an insulating material. Note that the surface 16 of the container 15 is an inclined surface.

The dust collecting paper container 15 has a space 1 for storing a rolled portion 17a of a band-shaped dust collecting paper 17 made of paper having substantially the same electrical insulation properties as paper towels.
It has 8. The roll-shaped portion 17a of the dust collecting paper 17 is attached to the winding frame 1.
7b, and a bottle 19 implanted in the container 15 is inserted into this winding frame 17b. The dust collecting paper 17 is pulled out from a drawer 20 provided in the container 15 and is drawn out from the surface 16 provided with the first and second dust collecting @poles 11,12.
It is arranged so as to extend from one end side to the other end side, and the end portion is fixed to the container 15 by a U-shaped holder 21 . In addition,
Perforations (not shown) extending in a direction perpendicular to the longitudinal direction of the dust collecting paper 17 are provided corresponding to the amount of use.

As shown in FIG. 4, the ionization electrode 10 has, for example, -7
kV is applied, the first dust collection electrode 11 is grounded, and the second
For example, +7 kV is applied to the dust collection electrode 12. Also, the ionization electrode 10 and the first collection! ! Electric 'f! 11 and the distance L2 between the first dust collecting electrode 11 and the second dust collecting electrode 12 are
and the distance L3 from each other. That is, the first collection! ! Electrode 11 is arranged between ionization electrode 10 and second dust collection electrode 12 .

When the potential of each electrode 10.11.12 is set as shown in FIG. Electric lines of force are generated from the electrode 11 toward the second collection 11 electrode 12. This generates an ion wind in the direction shown by arrow 22. Since the ionizing pole 10 is linear, it relatively easily starts discharging with a high voltage, and when dust comes into contact with gas ions and electrons generated by the discharge, the dust becomes negatively charged. The negatively charged a (ionized m) is connected to the first and second dust collection electrodes 1 whose potential is higher than that of the ionization electrode 10.
1. Move towards 12. First and second dust collection electrodes 1
1.12 is covered with the dust collecting paper 17, the dust is not directly attracted to the first and second dust collecting electrodes 11.12, but is attracted to the dust collecting paper 17. The first
Although the dust collection electrode 11 is located closer to the second dust collection electrode 12, the potential difference between the first dust collection electrode 11 and the ionization electrode 10 is greater than the potential difference between the second dust collection electrode 12 and the ionization electrode 10. Since the potential difference is smaller than the potential difference, all of the dust is transferred to the first dust collecting electrode 1.
1, the first and second dust collection amounts f! 11.1
It is divided into two and adsorbed. In addition, the second dust collection amount'#1
12 is located on the downstream side of the ion wind indicated by the arrow 22, so that the second dust collecting electrode 12 attracts the dust that could not be attracted by the first dust collecting electrode 11.

When the amount of dust attached to the dust collecting paper 17 increases and the dust collecting function deteriorates, the dust collecting paper 17 is released from the holder 21 and a new part of the dust collecting paper 17 is transferred to the rolled part 17a.
Rotate and pull out, cut off the used part,
The new part can be placed over the surface 16 of the receiving body 15 and the holder 2
Lock at 1.

The electrostatic air cleaning device of this embodiment has the following effects.

(1) Since the first and second dust collection electrodes 11 and 12 are provided, the degree of uneven distribution of dust on the dust collection paper 17 is reduced to about half that of the conventional method. Therefore, the usage time of the dust collecting paper 17 can be extended.

(2) When the period of use of the dust collecting paper 17 is the same as that of the conventional paper, the uneven distribution of dust adsorption is reduced, so that stable dust collection with little change over time can be performed. Also, ozone o
3 will be generated less.

(3) Since the second collection a electrode 12, which is set to a higher potential than the first dust collection amount @11, is located on the downstream side of the ion wind 22, dust that could not be adsorbed by the first dust collection electrode 11 can be effectively adsorbed by the second collected 1m current.

(4) Since a roll paper is used as the dust collecting paper 17, the arrangement in the dust collecting place can be achieved extremely easily.

(5) Since the dust collecting paper 17 used is built into the container 15, there is no need to store it in a separate location, and there is no risk of loss or damage.

(6) Since the dust collecting paper 17 is not attached with adhesive, there is no need to peel it off when cutting off the used part of the dust collecting paper 17. Therefore, the dust adsorbed on the dust collecting paper 17 does not scatter.

(7) Since the dust collecting paper 17 has perforations at regular intervals, the used portion can be easily discarded.

[Second Embodiment] Next, an electrostatic air purifier according to a second embodiment will be described with reference to FIGS. 5 and 6. However, in FIGS. 5 and 6, as well as FIGS. 7 and 8 showing the third embodiment, the same reference numerals are given to substantially the same parts as in FIGS. 1 to 4. The explanation will be omitted.

In the embodiment shown in FIGS. 5 and 6, the dust collecting paper container 15 is formed in a cylindrical shape, and first and second dust collecting electrodes 11, 12 are arranged in an annular manner on the outer peripheral surface 16 of the dust collecting paper container 15. Container 1
5 is provided with a drawer section 20 as in FIG. 1, from which the dust collecting paper 17 is drawn out. The roll portion 17a of the dust collecting paper 17 is rotatably supported by one pin implanted in the container 15. Needle-shaped numerous ionized charges &10
are provided on the support portion 13a so as to surround the cylindrical container 15. In addition, as shown by the chain line in FIG.
5 is covered with a cylindrical cover 23.

It is desirable to provide this cover 23 with a number of slits for forming air passages.

When using this electrostatic air purifier, the dust collecting paper 17 is pulled out from the roll-shaped portion 17a and wound onto the outer surface 16 of the container 15, and the dust collecting paper 17 is attached to the container 15 using the holder 21 made of a spring member. For example, -7 kV is applied to the ionization electrode 10, OV is applied to the first dust collection electrode 11, and +7 kV is applied to the second dust collection electrode 12. When the dust collecting paper 17 becomes dirty due to adhesion of dust, the dirty part is cut off using the perforations, and a new part is pulled out and wound around the container #15 again.

In addition to having the same functions and effects as the first embodiment, this embodiment has first and second dust collection electrodes 11.
12, it also has the effect that the effective area of these can be increased.

[Third Embodiment] In the container 15 of the third embodiment shown in FIGS.
A winding frame 25 is rotatably attached to the winding side pin 24, and one end of the dust collecting paper 17 is locked to the winding frame 25. That is, the dust collecting paper 17 has a pair of reel frames 17b, similar to a cassette tape for magnetic recording and reproduction.
, 25. The method of forming the first and second dust collection electrodes 11.12 and the method of forming the ionization electrode 10 on the oval housing 15 are substantially the same as in the second embodiment. Note that a separation wall 26 is provided between one bottle on one side and the other bottle 24.

When using this electrostatic air purifying device, as shown in FIG. 15 and returned into the inner space 18 of the container 15 using the drawer 20. First and second collection! Different voltages are applied to the electrobalance 11, 12 and ionization electrode IO as in the first and second embodiments. When the dust-collecting paper 17 that has been drawn out becomes dirty, the supply-side winding frame 17b and the take-up-side winding frame 25 are rotated clockwise together to wind a new portion around the container 15 to remove the dirt from the dust-collecting paper 17. The removed portion is wound onto the winding frame 25 on the winding side.

This embodiment has the same effects as the first and second embodiments, and also has the effect that the used portion of the dust collecting paper 17 can be easily disposed of.

[Modifications] The present invention is not limited to the above-described embodiments, and, for example, the following modifications are possible.

(1) As shown in Fig. 9, fold the dust collecting paper 17 and collect the dust collecting paper 17 while unfolding the folds! !
@ You may supply it to the best.

(2) In the embodiments shown in FIGS. 5 to 8, the container 15
An ionized ti may be placed above the .

(3) Three or more dust collecting electrodes may be provided and different voltages may be applied to each electrode.

(4) In FIG. 1, the first and second dust collection t-poles 11.
12 is provided on the sloped surface 16, the first
It may be provided on a flat surface as shown in Figure 0.

(5) A blower may be added to generate air flow from the ionization electrode 10 to the dust collection electrode 11.12, and an air cleaning filter may also be used.

(6) In the embodiment, general paper made of planted OJ fibers is used as the dust collecting paper 17, but instead of this, paper made of synthetic fibers or various sheet-like objects to which dust can adhere may be used. be able to.

(7) Instead of using the roll-shaped dust collecting paper 17, the first
As in the case of FIG. 0 or FIG. It may be placed on f111.12.

(8) An appropriate voltage different from that of the second dust collecting electrode 12 may be applied without grounding the first dust collecting electrode 11.

[Effects of the Invention] As described above, according to the present invention, dust is dispersed and attracted to a plurality of dust collection electrodes set at different potentials, so uneven distribution of dust is reduced and stable dust collection is possible. become. In addition, assuming that A dust paper is used until the dust collection function deteriorates to the same level as before, it will be possible to use the same dust collection paper for a longer period of time than before, making it possible to replace the dust collection paper more frequently. becomes less.

[Brief explanation of the drawing]

1 is a sectional view showing an electrostatic air purifier according to the first embodiment at a portion corresponding to line II in FIG. 2; FIG. 2 is a front view of the air purifier in FIG. 1; Figure 3 is the first
4 is a diagram showing the potential relationship of each electrode of the air purifying device shown in FIG. 1, and FIG. 5 is an electrostatic air purifier according to the second embodiment. A perspective view showing the device, FIG. 6 is a plan view of the air purifying device shown in FIG. 5, and FIG.
FIG. 8 is a front view of the air cleaning device of FIG. 7, and FIG. 9 is a diagram showing another form of dust collecting paper. FIG. 10 is a sectional view showing a conventional air cleaning device, and FIG. 11 is a front view showing another conventional air cleaning device. 10... Ionization electrode, 11... First dust collection electrode,
12... Second dust collection electrode, 15... Container, 17.
...Dust collecting paper, 17a... Roll-shaped part, 20... Drawer part.

Claims (1)

[Claims] Comprising an ionization electrode, a first dust collection electrode, and a second dust collection electrode, the distance between the ionization electrode and the first dust collection electrode and the first dust collection electrode and the second dust collection electrode is set smaller than the distance between the ionization electrode and the second dust collection electrode, and the potential of the first dust collection electrode is equal to the potential of the ionization electrode and the second dust collection electrode. An electrostatic air purifying device characterized in that the electric potential is set between the electric potential of the dust collecting electrode of No. 2.