JPH0283049A - Air cleaner - Google Patents

Abstract

PURPOSE:To contrive the maintenance of a deodorizer at longer intervals by providing an electric change part consisting of a discharge wire and a plate electrode on the upstream side of air flow and a dust collecting device on the downstream side thereof and making changeable the voltages applied to the discharge wire from a direct current high voltage source. CONSTITUTION:An electric charge part 1 consisting of a discharge wire 2 and a plate electrode 3 is provided on the upstream side of air flow and a duct collecting device 5 on the downstream side thereof. The voltages applied to the discharge wire 2 from a direct current high voltage source 4 is made changeable, i.e., the selection of the voltages applied to the discharge wire 2 permits the carrying out of either a dust collecting performance alone or a dust collecting and deodorizing performance in a simultaneous operation. Since an ozonizer permits the deodorization by the ozone ejected from the discharge wire, the deodorizing effect will not suffer a change with the passage of time and the deodorizer can be maintained at longer intervals.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an air cleaning device for collecting dust particles in the air.

BACKGROUND OF THE INVENTION The structure of a conventional example will be described below with reference to FIGS. 4 and 5.

In air purifying devices, a deodorizing filter is sometimes used for its deodorizing function. For example, JP-A-60-16602
As shown in Publication No. 0, a proposal has been made to use a deodorizing filter using impregnated activated carbon for deodorization. This Japanese Patent Application Laid-Open No. 60-166020 will be explained with reference to FIGS. 4 and 5.

101 is the main body of the air purifier, and 102 and 103 are air inlets and outlets provided in the air cleaner 101. 104 is a blower, 105 is a dust collection unit, 1
06 is a deodorizing filter, and 1o is impregnated activated carbon.

In the above configuration, the air sucked through the air intake port 102 is cleaned of dust by the dust collecting unit 105, and then odor components are adsorbed to the impregnated activated carbon 107 of the deodorizing filter 106 and the odor is removed. It is characterized by this.

Problems to be Solved by the Invention However, in the conventional air purifying device as described above, since the impregnated activated carbon 107 is used for deodorization, the odor adsorption ability gradually deteriorates and the deodorizing filter 106 must be replaced periodically. Therefore, it was necessary to maintain the deodorizing function over a long period of time.

In view of the above problems, the present invention provides an air cleaning device that can extend the maintenance-free period of the deodorizing function.

Means for Solving the Problems The present invention provides a charging section consisting of a discharge wire and a flat plate electrode on the upstream side with respect to the air flow, and a dust collection section on the downstream side to reduce the high DC voltage applied to the discharge wire. It is possible to change the voltage applied from the power supply.

Function The present invention, with the above-described configuration, generates dioscine by increasing the voltage applied to the discharge wire, decomposes the odor with the ozone, and extends the maintenance-free period of the deodorizing function.

EXAMPLE An example of the present invention will be described below with reference to FIG.

FIG. 1 is a schematic cross-sectional view showing the air cleaning device of the present invention.

In FIG. 1, 1 is a charging section provided on the upstream side of the airflow, and is composed of a high voltage discharge wire 2, a counter ground metal plate 3, and a high voltage power source 4 that applies a high voltage to the high voltage discharge wire 2. ing. 5 is a dust collecting section provided on the downstream side of the airflow, which includes a winding section 7 of the electret filter 6, a feeding section 8,
A motor 9 that drives the winding section 7 and a guide row/l/10.1 that arranges the electret filter 6 in a wave shape.
It consists of 1. Also, the guide row /l/ on the upstream side of the airflow
10 is formed so as to face the counter electrode ground metal electrode plate 3 and to be on the same straight line with respect to the airflow direction. Further, 12 is a pre-filter provided on the upstream side of the airflow of the charging section 1;
This is an ozone decomposition catalyst provided on the downstream side of the air flow of the fly electret filter 6.

The air cleaning device configured as described above will be explained using FIGS. 1 to 3.

First, turn on the operation switch of the air purifier (stop).
l)) Next, select the operation mode of the air purifier (moded...dust collection, mode 2...dust collector deodorization).
p2). First, mode 1 will be explained.

When mode 7 mode 1 is selected, a high voltage of eKV is applied to the high voltage discharge line 2 by the high voltage power supply 4, and a discharge current flows from the high voltage discharge line 2 to the counter ground metal plate 3, forming an ionized region. be done. Airborne particles in the air are taken into the air purifier by a blower (not shown) included in the device, and are first separated into coarse particles such as cotton dust with large particle diameters.
4 is removed by a prefilter 12. When the fine particles 15 that have passed through the pre-filter 12 pass through the ionized region, they are charged to a certain degree by repeated collision ionization of electrons and ions emitted within the ionized region and by the diffusion of ions, and become charged particles 16. It becomes (stop 3).

When the charged electrons 14' approach the electret filter 6, the charged particles 14' are attracted to the O side of the dipole polarizer of the electret filter 6 by electrostatic force and collected (s+tθp4).

Next, mode 2 will be explained. When mode 2 is selected, a high voltage discharge is caused by the high voltage power supply 4! A high voltage of 7.5 KV higher than that in mode 1 is applied to s2, and a discharge current flows from the high voltage discharge line 2 to the counter ground metal plate 3, forming an ionized region. Floating particles in the air are taken into the air purifying device by a blower (not shown) included in the device, and coarse particles 14 such as cotton dust with a large particle size are first removed by a pre-filter 12. be removed. The fine particles 15 that have passed through the pre-filter 12 are charged with O by repeated collision ionization of electrons and ions emitted within the ionization region and diffusion of ions when passing through the ionization region, and become charged particles 16 (stop 5).

At this time, the high voltage discharge line 2 has a voltage higher than mode 1.
Since 5KVO high voltage is applied, the amount of ozone generated increases significantly as shown in FIG. 3 (stop 8).

When the charged particles 16 approach the electret filter 6, the charged particles 16 are attracted to the O side of the dipole polarizer of the electret filter 6 by electrostatic force and are collected (stop 7).

Further, the odor components 17 sent into the air cleaning device together with the suspended particles pass through the ionized region without being collected by the electret filter 6. However, high concentration ozone generated from the high voltage discharge line 2 reacts with the odor component 17 and decomposes the odor component (stop 8).

Ozone concentration decreases when odor component 17 decomposes and naturally decomposes, but when the remaining ozone passes through the air purifier and is discharged into the room, it gives off a characteristic ozone odor and causes discomfort to the user. Therefore, residual ozone is decomposed using the ozone decomposition catalyst 13 (stop 9).

As described above, in Mode 1 and Mode 2, the amount of ozone generated can be changed by changing the voltage applied to the high voltage discharge line 2, and ozone is the odor component 17 of methyl mercaptan and trimethylamine.

Because it has the ability to decompose hydrogen sulfide, ammonia, etc.
These odor components can be decomposed and deodorized. In ozone generation, since the high-voltage discharge wire 2 used for dust collection is used, the deodorizing effect does not deteriorate over time and the maintenance-free period can be extended.

Effects of the Invention As described above, the air purifying device of the present invention provides a charging section consisting of a discharge wire and a flat plate electrode on the upstream side of the air flow, and a dust collection section on the downstream side. The structure is such that the voltage applied to the wire from the DC power source can be changed.

Therefore, by selecting the voltage applied to the discharge wire, it is possible to perform only dust collection function or dust collection and deodorization function.
In addition, the deodorizing function can be deodorized using ozone generated from the discharge wire, so that the deodorizing effect does not deteriorate over time and the maintenance-free period of the deodorizing function can be extended.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an air purifying device that is an embodiment of the present invention, Fig. 2 is a flowchart showing an example of air purification, and Fig.
The figure is a characteristic diagram showing the relationship between the amount of odor and the amount of ozone generated in this example, Figure 4 is a schematic diagram of a conventional air cleaner, and Figure 5 is a perspective view of a deodorizing filter used in the air cleaner. It is. 1...Charging part, 2...High voltage discharge line,
3... Counter electrode ground metal plate, 4... High voltage power supply, 6... Dust collection section. ! -Charged part? - Gaoden Koi 11 Izumi 3, Pair of Noodles, Concubine, Metal Food Rebellion 4 - Baroden Tile Den 5 See s - Hayabusa County 2nd Figure 1rf! J Figure Figure

Claims (2)

[Claims] (1) An air purifying device in which a charging section consisting of a discharge wire and a flat plate electrode is provided on the upstream side with respect to the air flow, and a dust collection section is provided on the downstream side. (2) Claim 1 characterized in that the voltage applied from the DC high voltage power source to the discharge wire can be changed.
Air purifying device as described in section.