JPH08266930A - Electrostatically air-cleaning apparatus - Google Patents

Abstract

PURPOSE: To provide an electrostatically air-cleaning apparatus whose dust collecting effect is scarcely lowered even in the case a dust collecting sheet is used for a long period without being changed. CONSTITUTION: This electrostatically air-cleaning apparatus is one for collecting dust by applying d.c. high voltage between a cathode line or a cathode probe 3 and an anode plate 8 which are installed at an interval and attracting dust in air which bears negative charge by the cathode line or the cathode probe 3 to the anode plate 8 side. A dust collecting sheet 4 is installed between the cathode line (or probe) 3 and the anode plate 8 in such a way that the sheet can be moved freely by a prescribed distance by a driving means and also a cleaning means 11 to remove dust adhering due to dust collection is installed near the dust collecting sheet 4. In the case the dust collecting effect of the dust collecting sheet 4 is deteriorated because the sheet is soiled with dust, the dust collecting sheet 4 is moved by a prescribed distance, so that the dust collecting effect is again recovered and the dust collecting effect is scarcely lowered for a long period. Since the dust collecting sheet 4 can be used repeatedly, the sheet does not need to be changed and is economical.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic air purifying device whose dust collecting effect is less likely to decrease even after long-term use.

[0002]

2. Description of the Related Art Conventionally, dust particles in the air are ionized,
As an electrostatic air purifying device for adsorbing ionized particles to purify air, for example, a device described in Japanese Patent Publication No. 2-29386 is known. The air purifying device of the above publication has a linear cathode and a flat plate-shaped anode provided in parallel with the axial center of the cathode and symmetrically separated from each other. When shunting to the left and right toward the anode, dust particles in the air are negatively charged by the cathode, and the negatively charged particles are adsorbed to the anode plate by Coulomb force and dust in the air is collected. It has the function of purifying air without the need for a drive unit.

However, in the air purifying apparatus of the above publication, dust particles are adsorbed on and collected by the anode plate, so that there is a problem that the dust adhering to the anode plate is often required to be removed. In order to improve such a problem, as shown in FIG. 1, there is also proposed an air cleaning device in which a dust collecting sheet d is detachably provided on the front surface of a dust collecting portion c composed of a cathode a and an anode b. Note that e indicates a cover.

In the above air cleaner, since dust particles in the air are captured by the dust collecting sheet d before being adsorbed to the anode b, the dust collecting sheet d can be used again only by cleaning or exchanging the dust collecting sheet d. It has the effect that maintenance management is easier than that of

[0005]

However, in this type of electrostatic air purifying apparatus, when the resistance value between the cathode a and the anode b decreases due to the moisture in the air absorbed by the dust collecting sheet d, the cathode a and the anode b are reduced. Since a circuit for controlling the DC high-voltage power supply is provided so that an excessive current does not flow from the DC high-voltage power supply applying a high voltage between b, the voltage applied between the cathode a and the anode b decreases. However, as a result, the dust collection performance deteriorates. For this reason, the air cleaning device provided with the dust collecting sheet d often has a problem that maintenance is troublesome because it is often necessary to clean or replace the dust collecting sheet d.

In order to improve the above-mentioned problems, for example, Japanese Patent Application Laid-Open No. 2-198650 proposes an air purifying device in which a dust collecting sheet is rolled and sequentially wound so that the dust collecting effect is not deteriorated. There is. However, the above air purifier also has a problem that maintenance work is troublesome because it requires a work of replacing with a new dust collecting sheet when the roll-shaped dust collecting sheet is used up. The present invention has been made in order to improve the above-mentioned problems, and provides an electrostatic air purifying device in which the dust collecting effect is less likely to decrease even if the dust collecting sheet is used for a long time without being replaced. It is intended.

[0007]

In order to achieve the above object, the present invention provides a single or a plurality of cathode lines arranged at intervals, or a cathode needle and a cathode needle or a cathode needle which are continuously connected linearly. Apply a high DC voltage from a DC high voltage power supply to one or more anode plates that are arranged almost parallel to
In a fanless electrostatic air cleaning device that attracts dust in the air, which is negatively charged by a cathode ray, to the anode plate side and collects the dust, an endless device that covers the anode plate and is movable a predetermined distance by a driving means. -Like dust collecting sheet is provided,
In the vicinity of the dust collection sheet, cleaning means for removing dust and the like attached by dust collection is provided.

Further, by forming the dust collecting sheet endlessly and rotating it in one direction by the driving means, or by winding both ends on a pair of winding rollers and rotating the winding rollers forward and backward by the driving means, The dust collecting sheet is moved back and forth.

[0009]

With the above structure, the dust collecting sheet is regularly moved to collect dust on a new surface, so that the dust collecting effect does not decrease for a long period of time. In addition, since the dust etc. adhering to the dust collection sheet is removed by the cleaning means, it can be reused, and this makes it unnecessary to replace the dust collection sheet for a long period of time, which makes maintenance easy and is economical. is there.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS. FIG. 2 is a vertical cross-sectional view of the electrostatic air purifier, and FIG. 3 is a front view of a state in which a cover provided on the front surface is opened.

In these figures, reference numeral 1 denotes a main body, which is formed of a case 1a whose lower side is substantially trapezoidal and whose upper side is flat in the front-back direction. On the front surface of the case 1a, there is a cover 1b whose one end side is screwed by a hinge 2 and which can be opened and closed in the forward direction. When the cover 1b is opened,
A part or part of the dust collecting sheet 4 and one or a plurality of cathode lines provided in the upper part of the case 1a or the cathode needles 3 linearly connected to each other are exposed. The cathode wire or the cathode needle 3 is composed of, for example, two linear members stretched in parallel with each other at intervals in the vertical direction, and both ends thereof are fixed to insulators 3a provided on both inner surfaces of the case 1a. In addition, a negative DC high voltage is applied from the DC high voltage power supply 5 provided in the lower part of the case 1a.

The dust collecting sheet 4 is made of dust collecting paper, non-woven fabric, or the like, and is formed of an endless belt slightly smaller than the width of the case 1a in the left-right direction so as to be accommodated in the case 1a. It is wound between a plurality of guide rollers 6 provided on the front side of the upper part, the intermediate part and the lower part, and a drive roller 7 provided on the rear side of the lower part. Since the dust collecting sheet 4 located on the upper part of the case 1a bypasses one guide roller 6 provided on the upper part, the space between the front dust collecting sheet 4 and the rear dust collecting sheet 4 is the above. The front side of the dust collecting sheet 4 on the front side is located behind the air intake port 1c opened in the cover 1b, and is separated from the front side of the dust collecting sheet 4 by the diameter of the guide roller 6.
For example, three anode plates 8 are installed. The above anode plate 8
Is provided on the front surface of the flat plate 8a made of an insulator,
It is installed between the two cathode lines (or needles) 3 at substantially equal intervals above and below and parallel to the cathode lines 3. The number of the anode plate 8 may be one.

A positive DC high voltage is applied to these anode plates 8 by the DC high voltage power source 5. A porous member 1d such as a net is attached to the air intake port 1c opened in the cover 1b so that a hand or the like does not touch the cathode ray (needle) 3 or the dust collecting sheet 4.

On the other hand, on the lower side of the dust collecting sheet 4, a case 1a is formed by a guide roller 6 in the middle and a lower guide roller 6.
Along the inside of the lower part, it is spread out in a substantially triangular shape. The drive roller 7 provided on the rear side of the case 1a is connected to a rotary drive source 10 such as a motor provided in the case 1a. By rotating the drive roller 7 by the rotary drive source 10, The dust collecting sheet 4 can be rotated in the direction of the arrow in FIG.

The front guide roller 6 is composed of two rollers which are vertically separated from each other, and cleaning for removing dust and the like adhering to the surface of the dust collecting sheet 4 near the lower guide roller 6 is performed. Means 11 are provided.
The cleaning unit 11 is composed of, for example, a rotating brush, and is configured to scrape off dust and the like adhering to the surface of the dust collecting sheet 4 while rotating while the dust collecting sheet 4 moves. Dust and the like are stored in a tray 12 provided below the cleaning means 11.

A take-out port 13 for dust and the like is opened on the entire surface of the receiving tray 12, and by connecting a suction port such as an electric vacuum cleaner to the taking-out port 13, the receiving tray 1
The dust and the like in 2 can be removed by suction, and a germicidal lamp 14 such as an ultraviolet lamp is provided above the cleaning means 11, and the ultraviolet rays emitted from the germicidal lamp 14 are applied to the dust collecting sheet 4 drug species 11. This makes it possible to sterilize various bacteria in the dust.

Next, the operation of the air cleaning device having the above structure will be described. When the power of the air purifier is turned on, a high DC voltage is applied between the anode plate 8 and the cathode wire or the needle 3 from the DC high voltage power supply 5, and an ion wind is generated from the cathode wire (needle) 3 side toward the anode plate 8 side. As a result, the air around the main body 1 is supplied to the case 1a through the air intake port 1c opened in the cover 1b.
Flows into the upper part of. The dust particles in the air are attracted to the anode plate 8 after being negatively charged when passing through the vicinity of the cathode line (needle) 3. However, since the dust collecting sheet 4 is in front of the anode plate 8, 2 and the like are collected in the range A of the dust collecting sheet 4 shown in FIG.

Further, the dust collecting sheet 4 is used during a long time use.
When the dust is polluted and the dust collecting effect is reduced, the rotary drive source 5 is rotated for a certain period of time by means of a timer or the like, whereby the dust collecting sheet 4 is moved by a certain distance (a distance substantially equal to the range A shown in FIG. 2) in the arrow direction. Since the dust collection sheet 4 is rotated, the new surface of the dust collection sheet 4 is moved to the rear of the air intake port 1c, and the collection of dust and the like is started again on the new surface.

On the other hand, when the surface of the dust collecting sheet 4 on which the dust and the like is attached reaches the cleaning means 11 as the dust collecting sheet 4 rotates, the dust and the like attached to the surface of the dust collecting sheet 4 by the rotating brush of the cleaning means 11 enters the tray 12. While being scraped off, bacteria and the like in the dust are sterilized by the ultraviolet rays emitted from the sterilization lamp 14.

If dust or the like accumulates in the tray 12 during long-time use, connect a suction port such as an electric vacuum cleaner to the outlet 13 to remove dust or the like from the tray 12 by suction. Good. The tray 12 may be of a pull-out type, and the tray 12 may be pulled out to clean the inside of the tray 12.

On the other hand, FIG. 4 shows another embodiment of the present invention, in which a pair of take-up rollers 16 which are normally and reversely rotated by a rotation drive source (not shown) are provided on both sides of a flat plate 8a provided with an anode plate 8. Both ends of the dust collecting sheet 4 are wound around these winding rollers 16.

A cathode 3 mounted on the cover 1b side is provided at a position facing the anode plate 8 and a high DC voltage is provided between the anode plate 8 and the cathode wire or needle 3 as in the above embodiment. A DC high voltage is applied from the power source 5, and a cleaning means 11 for removing dust and the like adhering to the surface of the dust collecting sheet 4 is provided near the winding roller 16.

The air purifying device having the above structure also collects dust and the like in the air by the dust collecting sheet 4 in the same manner as in the above embodiment, but the dust collecting sheet 4 is contaminated during long-time use. When the dust collecting effect is reduced, one winding roller 16 is rotated to wind the dust collecting sheet 4 for a certain distance. As a result, the new surface of the dust collecting sheet 4 reaches the flat plate 8a, so that the dust collecting function is restored and, when the dust collecting sheet 4 is wound around the winding roller 16, the dust collecting sheet 4 is attached to the dust collecting sheet 4 by the cleaning means 11. Dust etc. is scraped off.

When the dust collecting sheet 4 of the other winding roller 16 is exhausted while repeating the above winding operation, the other winding roller 16 starts winding the dust collecting sheet 4. By rotating the take-up roller 16 forward and backward to move the dust collecting sheet 4 back and forth, even if it is a roll-shaped dust collecting sheet 4, a good dust collecting effect can be obtained for a long period without replacing the dust collecting sheet 4. You will get it.

[0025]

As described in detail above, the present invention can be used for a long period of time because the dust collecting sheet for collecting dust in the air can be moved to repeatedly collect dust on a new surface. Even if it does, the dust collection effect does not decrease.

Further, when the dust collecting sheet is moved, dust and the like adhering to the dust collecting device is scraped off by the cleaning means, and the dust collecting sheet is regenerated so that it can be used again. There is no need to replace the dust collecting sheet, which facilitates maintenance and is economical.

Further, if a sterilizing lamp is provided near the cleaning means to irradiate the dust adhering to the dust collecting sheet and the dust removed from the dust collecting sheet with ultraviolet rays,
It is hygienic because it can sterilize various bacteria in the dust.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a conventional electrostatic air cleaning device.

FIG. 2 is a vertical sectional view of an electrostatic air purifying apparatus according to an embodiment of the present invention.

FIG. 3 is a front view of the electrostatic air purifier according to the embodiment of the present invention with the cover opened.

FIG. 4 is an explanatory view showing another embodiment of the electrostatic air purifying device of the present invention.

[Explanation of symbols]

 3 Cathode wire or cathode needle 4 Dust collection sheet 5 DC high-voltage power supply 8 Anode plate 11 Cleaning means 14 Sterilization lamp 16 Winding roller

Claims (4)

[Claims] 1. A single or a plurality of cathode lines arranged at intervals, or a single or a plurality of anode plates which are arranged substantially parallel to the cathode needles 3 and the cathode needles 3 which are continuously continuous in a linear manner. 8, a DC high voltage is applied from a DC high voltage power source 5 to attract dust and the like in the air, which is negatively charged by the cathode wire 3, to the anode plate 8 side to collect the dust. In the air purifying device, the anode plate 8 is covered,
Further, an endless dust collecting sheet 4 which is movable by a predetermined distance by a driving means is provided, and a cleaning means 11 for removing dust and the like adhering due to the dust collecting is provided in the vicinity of the dust collecting sheet 4. Electrostatic air purifier. 2. The electrostatic air purifying apparatus according to claim 1, wherein the dust collecting sheet 4 is formed in an endless shape and is moved in a fixed direction by a driving means. 3. The dust collecting sheet 4 is reciprocally moved by winding both ends of the dust collecting sheet 4 around a pair of winding rollers 16 and rotating each of the winding rollers 16 forward and backward by a driving means. 1. The electrostatic air purifier according to 1. 4. A germicidal lamp 1 is provided near the cleaning means 11.
The electrostatic air purifier according to claim 1, wherein the electrostatic air purifier is provided with 4.