JPH0353979B2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention is used in homes, offices, factories, etc., and relates to an air purifier that removes fine dust or odorous substances floating in the air. In particular, it has high dust collection efficiency and is advantageous for miniaturization.
Moreover, the present invention relates to an air purifier that is improved in terms of ease of maintenance such as cleaning of the dust collection electrode and filter.

(Prior art) Air purifiers that pass air through a high voltage band to charge and attract dust contained in the air have been used for a long time to remove soot and smoke generated from factories. However, in recent years, products for home and office use have become popular.

The basic configuration is described in Japanese Patent Publication No. 17379/1979, which was invented by the present inventor, but in particular, in this type of dust collector, the absorption efficiency is significantly improved due to the difference in the shape of the electrodes. Not only is there a difference, but it is also known from experience that adsorption efficiency suddenly decreases due to adhesion and solidification of charged dust to the dust collecting electrode, and various improvements to the electrode have been proposed.

It is common to use a tungsten wire as the charging electrode and an aluminum plate as the dust collection electrode, and there are various shapes.
An example of a dust collection electrode using randomly rounded filaments as in the present invention is disclosed in Japanese Patent Application Laid-Open No. 48-33467.
Some of them are described in Japanese Utility Model Publication No. 57-43840.

In addition, in electric dust collectors used in factories, the charging electrode is a negative electrode and the dust collecting electrode is a positive electrode, which is normal.In air purifiers used in homes and offices, ozone To account for generation, it is common for each electrode to have opposite polarity.

(Problem to be Solved by the Invention) In an electrostatic precipitator type air purifier, dust charged by a positively charged electrode is adsorbed by a negatively charged dust collecting electrode, thereby removing dust from the air. However, as adsorption progresses, the surface of the negative electrode becomes covered with soot-like substances, resulting in a significant drop in adsorption efficiency. In addition, in such a situation, there is a problem that the soot-like substances that are scattered without being absorbed stick to nearby objects, which requires the use of quite thick filters, which increases the load on the motor, It is also necessary to use a large fan, making the entire device large.

Furthermore, with conventional air purifiers, it is practically impossible for the user to clean the dust collection electrode (negative electrode) on which soot-like substances are adhered, and furthermore, maintenance, including filter replacement, is extremely difficult. It was complicated and hot.

The present invention was created in view of the above,
It has high adsorption efficiency for dust, etc., allows for miniaturization of the device, and does not scatter unadsorbed charged dust, etc.
Moreover, the main purpose is to reveal an improved air purifier that is easy to maintain.

(Structure of the Invention) Next, an air purifier according to the present invention will be described in detail with reference to embodiments shown in the accompanying drawings.

FIG. 1 is an exploded perspective view showing the main parts of an embodiment of the air purifier according to the present invention.
-13 are support stands for fixing electrodes, etc., which will be described later, and are fixed to a frame (not shown);
Alternatively, it may be formed by a convex portion formed on the frame.

20 is a positive electrode (charged electrode), and it is preferable to use a chrome-plated tungsten wire with a thickness of about 0.5 mm, but the type, thickness, shape, etc. of the metal used are not limited.

30 is a negative electrode (dust collecting electrode), 31 is a first auxiliary negative electrode, 32 is a second auxiliary negative electrode, 50 is a fan, and 60 is a filter unit.

The shape of the negative electrode 30 is also related to the shape of the positive electrode 20.
Furthermore, since it is related to dust collection efficiency, it is not limited to what is illustrated.

Furthermore, 21 and 33 are for generating ozone, and are arranged on the front side of the filter unit 60. 21 is a positive electrode, and 33 is a negative electrode, which are connected in parallel with both the positive and negative electrodes mentioned above. However, in order to avoid crackling noise caused by discharge, it is preferable to operate by lowering the voltage through a resistor.

The main feature of the air purifier of the present invention is that each electrode is made into a unit and is configured to be easily removed, and that the second auxiliary negative electrode 32 is used as a clutter in the filter section, which is the most likely to get dirty. This is further fixed in a sandwich shape with filters 40 and 41 made of cotton, fibers, or sponge-like synthetic resin, and the unit ( The point is that it has become a cassette.

The filter may be configured so that only one of 40 and 41 is disposed.

Note that in order to energize the second auxiliary negative electrode 32, it is sufficient to prepare a needle-shaped terminal and push the entire frame 60 downward as shown in the figure.

With the structure described above, each electrode can be easily removed from the device for cleaning during maintenance, and can be cleaned if soot-like substances are stuck and it is difficult for the user to clean it by himself/herself. Use it by replacing it with the old one.

Incidentally, if an adsorbent such as activated carbon or zeolite is interposed in the filter part, it will be more effective in removing bad odors.

A DC voltage of approximately 3 Kv to 7 Kv is applied to the positive electrode 20, negative electrode 30, first auxiliary negative electrode 31, and second auxiliary negative electrode 32 configured as described above, and air is circulated in the direction of the electrodes by the blower 50. If this is done, dust particles in the air will be positively charged due to the discharge phenomenon from the positive electrode 20 to the negative electrode 30, and will be attracted to the negative electrode 30 side. Dust, etc. that has passed through without being attracted to the negative electrode 30 side is electrically damaged or affected by a collision effect while passing through the labyrinth-like linear space of the second auxiliary negative electrode 32 arranged behind the negative electrode 30. separated from air by

Note that as the DC voltage to be used, a pulse current that is intermittently turned on and off at a frequency of about 180/sec may be applied.

(Effects of the Invention) Since the air purifier of the present invention is configured as described above, in particular, due to the presence of the second auxiliary negative electrode 32, the adsorption efficiency of dust etc. is good, and it is effective in reducing the overall size. Moreover, each electrode can be taken out and washed easily, which is advantageous for maintenance including filter replacement.

Furthermore, due to the presence of the second auxiliary negative electrode 32, the filters 40 and 41 can be thinner than conventional ones, and air resistance is small, so there is an advantage that a small and quiet motor can be used.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention. In the figure, each symbol indicates the following. 10...
...Support stand, 11...Support stand, 12...Support stand, 1
3... Support stand, 20... Positive electrode (charged electrode),
30... Negative electrode (dust collection electrode), 31... First auxiliary negative electrode, 32... The auxiliary negative electrode, 40... Filter, 41... Filter, 5
0...Blower device, 60...Frame.

Claims (1)

[Claims] 1. A positive electrode and a negative electrode to which a high voltage is applied are arranged at a certain distance from each other, and air is circulated in this high voltage band, so that air contained in the air passing through the positive electrode is disposed at a certain distance. In an air purifier that charges dust, etc. and adsorbs it with a negative electrode, in addition to the negative electrode placed around the positive electrode, an auxiliary negative electrode is placed at a certain distance from these electrodes. This auxiliary negative electrode is formed of a randomly rolled metal wire body, and is fixed in a sandwich-like manner by filters placed on both sides of the metal wire. An air purifier characterized in that it is made into a unit by a frame having a certain shape, and is configured to be detachable from a connecting terminal that conducts electricity to an auxiliary negative electrode. 2 Claim 1, characterized in that the positive and negative electrodes are set in opposite configurations.
Air purifier as described in section.