JPH09131548A - Air purifying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a device thin and simple in structure by imparting the action of a float electrode by an autobias system to a deodorizing filter. SOLUTION: In an electric dust collection type air purifier, a charging part 20, a deodorizing filter 40 having electric conductivity and a dust collecting part 30 including a collector electrode electrically connected to the deodorizing filter are arranged in the order from the upstream side to the downstream side in the flow direction of air to be purified. Since the deodorizing filter 40 performs the action of the float electrode in the autobias system with the deodorizing action of the original function of the deodorizing filter and the conventional float electrode is eliminated, the thin shaped structure of the device, the decrease of the numbers of the parts and the simplification of the structure are attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifying device of an electrostatic precipitating system, and more particularly to an air purifying device having an auto bias float electrode in an electric precipitating portion.

[0002]

2. Description of the Related Art An air purifier employing an electric dust collecting method in which dust and the like are positively ionized by corona discharge and the dust and the like are captured by a negative electrode is known.

FIG. 7 shows an example of a conventional air cleaner of the auto bias type. This air purifier has a pre-filter 54 for removing a large amount of dust in advance from an upstream side to a downstream side of an air flow path, an ionizer (charging portion) 51 for charging dust particles, and an electric coulomb for charged dust particles. A collector (dust collecting part) 52 that sucks by force, a deodorizing filter 53 that removes ozone (0 ₃ ) generated in the ionizer 51, the odor of cigarettes, and the like, and a blower fan 55 are arranged to connect the ionizer 51 and the collector 52. The float electrode 52c is interposed between them. This float electrode 5
2 c is in an electrically floating state and applies a high voltage (about 3 [kV]) induced by a high voltage (about 5 [kV]) applied to the ionizer 51 to the high potential side collector electrode 52 b of the collector 52. This configuration allows for automatic biasing without the need for a collector power supply. Low potential (ground potential) side collector electrode 5 facing the high potential side collector electrode 52b
2a is arranged. In the figure, 8 is a high-voltage power supply that supplies a high voltage to the discharge electrode of the ionizer 51, and 7 is an overcurrent breaker that stops the supply of the high voltage when an overcurrent occurs.

In this air purifier, dust particles and the like contained in the passing air are charged or cationized by the corona discharge generated in the ionizer 51, and the cationized dust particles are then electrically attracted by the Coulomb force in the collector 52. The air is captured and dust is collected, then deodorized by the deodorizing filter 53, and the purified air is supplied to the room or the like by the blower fan 55.

[0005]

As can be seen from the above-mentioned configuration, the above-mentioned conventional air purifying device has the constituent components stacked in the direction of the air flow path, resulting in a thicker device configuration and a larger size. Was forced to.

An object of the present invention is to provide an air cleaning device which can be thinned and simplified in device configuration.

[0007]

In order to solve the above-mentioned problems, the present invention as set forth in claim 1 is directed to an electrostatic precipitating type air cleaner from an upstream side to a downstream side in a flow direction of air to be cleaned. In order, a charging unit that charges and ionizes dust particles, a conductive deodorizing filter, a high-potential-side collector electrode electrically connected to the deodorizing filter, and a high-potential-side collector electrode facing each other. And a dust collecting part formed of the collector electrode on the low potential side.

According to the present invention, the deodorizing filter disposed between the charging section and the dust collecting section has conductivity, is placed in an electrically floating state, and has a collector electrode on the high potential side of the dust collecting section. Since it is electrically connected to, the high voltage applied to the charging portion induces a high voltage in the deodorizing filter, and the induced high voltage is applied to the high potential side collector electrode. Therefore, the deodorizing filter performs the function of the float electrode in the auto bias system at the same time as the deodorizing function which is the original function, and the conventional float electrode can be omitted. As a result, the device configuration can be made thinner, the number of parts can be reduced, and the configuration can be simplified.

According to a second aspect of the invention, in the air cleaner according to the first aspect, the deodorizing agent of the deodorizing filter is constituted by activated carbon. According to the present invention, there is provided a deodorizing filter having both deodorizing property and conductivity and functioning as a follower and an electrode.

According to a third aspect of the present invention, in the air cleaner according to the first or second aspect, the deodorizing filter has a metal frame or a metal aggregate.
According to the present invention, examples are disclosed in which rigidity and conductivity can be improved and which is suitable as a follower and an electrode.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of the invention will be described with reference to the drawings.

(I) Overall Structure of Air Purifier FIGS. 1 and 2 show an example of the overall structure of a home air cleaner. In this air purifier, an electric dust collector A, a power supply control unit 2, a fan 3, a short-circuit switch 4 and the like are arranged inside a case 1. The case 1 includes a front case member 1a and a rear case member combined with the front case member 1a. 1b and a front panel 1c that is detachably attached to the front case member 1a and covers the storage location of the electrostatic precipitator 3.

The air sucked from the air intake slit 5 provided in the lower portion of the front panel 1c passes through the electrostatic precipitator A by the drive of the fan 3, and then blows out in the upper portion of the front panel 1c. It is designed to be blown out from the part 6.

As shown in FIG. 3, in the electrostatic precipitator A, a prefilter 10, an ionizer 20, and a collector 30 are arranged in this order, and the ionizer 20 and the collector 30 are arranged.
A deodorizing filter 40 that also serves as a float electrode is interposed between and.

FIG. 4 shows a configuration example of the ionizer 20. The ionizer 20 includes a discharge electrode 21 and a counter electrode 22.
, And generates corona discharge between the discharge electrode 21 and the counter electrode 22 and imparts it to molecules in the passing air to cationize it, or cationizes dust or the like.

The discharge electrodes 21 are made of a wire made of a material such as tungsten, and are arranged in parallel while shifting the positions at predetermined intervals between the electrode mounting pieces 24 (see FIG. 1) provided at both ends of the assembling frame body 23. It is attached so as to be passed over many times, and is stretched with a predetermined tension of the spring 25.

A high voltage (8 [kV]) from a high voltage power source 8 is connected to the discharge electrode 21 via an overcurrent breaker 7, and when an overcurrent flows to the discharge electrode 21 for some reason. The power supply from the high voltage power source 8 is automatically stopped.

The counter electrode 22 is formed as a plate plate,
It is arranged in the gap between the discharge electrodes 21 arranged in parallel.

The collector 30 is a plate-shaped collector electrode 31.
And a plate-shaped float electrode 32. The low-potential-side collector electrodes 31 and the high-potential-side collector electrodes 32 are alternately arranged at a predetermined interval. The collector electrode 31 is grounded. The high potential side collector electrode 32 is electrically connected to the conductive deodorizing filter 40, and the high voltage (about 3 kilovolts) induced by the deodorizing filter 40 is applied to the high potential side collector electrode 32. .

The deodorizing filter 40 uses activated carbon as a deodorizing agent. Since the activated carbon has conductivity, the deodorizing filter 40 as a whole has conductivity, and its electrical resistance is about 10 ⁸ [Ω · cm]. Deodorizing filter 4
For 0, it is possible to use a plate-like solidified form of activated carbon, but it is preferable to use an appropriate frame or aggregate to provide rigidity. Examples thereof are shown in FIGS. 5 and 6.

As shown in FIGS. 5 and 6, the deodorizing filter 4
0 is the activated carbon 43, the corrugated metal aggregate 44 that reinforces the activated carbon 43, the metal wire 42 or the metal plate 45.
(See FIG. 6) and a metal frame body 4 surrounding the activated carbon 43.
1.

By reinforcing the metal frame 41, the metal aggregate 44, the metal wire 42 or the metal plate 45 as described above, the rigidity of the deodorizing filter 40 is improved and the conductivity of the deodorizing filter 40 itself is increased. Since it attracts a high voltage applied to the discharge electrode 21 of the ionizer 20, it acts as a float electrode.

Next, the operation of this embodiment will be described.

In this air cleaning device, the ionizer 20
When a voltage is applied between the discharge electrode 21 and the counter electrode 22, the induced voltage is also generated between the float electrode 32 and the collector electrode 31. Further, the fan 5 is driven, and the air is forced to pass through the electrostatic precipitator A.

The dust in the air taken into the electrostatic precipitator A through the pre-filter 10 is positively ionized by the corona discharge generated in the ionizer 20, and the ionized dust is attracted by the Coulomb attractive force in the collector 30. Dust is collected and removed.

At this time, in this dust collector, ozone is generated by corona discharge in the ionizer 20. This ozone kills bacteria and mites in the air, but if it is discharged outside the device as it is, it will be harmful to the human body and will be adsorbed by the activated carbon filter 40.

[0027]

As described above, according to the first aspect of the invention, the deodorizing filter arranged between the charging section and the dust collecting section has conductivity and is placed in an electrically floating state. Moreover, since it is electrically connected to the collector electrode on the high potential side of the dust collecting part, a high voltage is induced in the deodorizing filter by the high voltage applied to the charging part, and the induced high voltage is the collector on the high potential side. Given to the electrodes. Therefore, the deodorizing filter performs the function of the float electrode in the auto bias system at the same time as the deodorizing function which is the original function, and the conventional float electrode can be omitted. As a result, the device configuration can be made thinner, the number of parts can be reduced, and the configuration can be simplified.

According to the invention described in claim 2, there is provided a suitable deodorizing filter having both deodorizing property and conductivity.

According to the third aspect of the present invention, it is possible to improve the rigidity and conductivity of the deodorizing filter.

[Brief description of the drawings]

FIG. 1 is a diagram showing a main internal structure of an air purifying apparatus according to the present invention when viewed from the front.

FIG. 2 is a view showing a main internal structure of the air cleaning apparatus shown in FIG. 1 when viewed from a side surface.

FIG. 3 is an exploded perspective view showing an electric dust collector.

FIG. 4 is a schematic view showing a configuration of an electrostatic precipitator according to an embodiment of the present invention.

FIG. 5 is a perspective view showing another structure of the deodorizing filter of the present invention.

FIG. 6 is a sectional perspective view showing still another structure of the deodorizing filter of the present invention.

FIG. 7 is a schematic view showing a configuration of an electric dust collector of a conventional air cleaning device.

[Explanation of symbols]

 7 High-voltage power supply 8 Control device 9 Overcurrent breaker 10 Prefilter 20 Ionizer 21 Discharge electrode 22 Counter electrode 30 Collector 31 Collector electrode 32 Float electrode 40 Deodorization filter

Claims (3)

[Claims] 1. An electric dust collector-type air cleaner, comprising: a charging unit that charges and ionizes dust particles in order from an upstream side to a downstream side in a flow direction of air to be cleaned;
A deodorizing filter having conductivity and placed in an electrically floating state, a high potential side collector electrode electrically connected to the deodorizing filter, and a low potential side facing the high potential side collector electrode. An air purifier, characterized in that a dust collecting portion composed of a collector electrode is arranged. 2. The air purifier according to claim 1,
The air purifying device, wherein the deodorizing agent of the deodorizing filter is activated carbon. 3. The air purifier according to claim 1, wherein the deodorizing filter has a metal frame or a metal aggregate.