KR980008331A - Air purifier - Google Patents

Abstract

Conventional capacitive air cleaners are not able to change the dust collection effect according to the change in the degree of contamination.

Outside the cylindrical cylindrical portion 10 having insulation, a first dust collecting portion including the first ionizing electrode 1, the first and third dust collecting electrodes 3 and 5, and the dust collecting paper 16 is provided. Inside the cylindrical cylindrical part 10, the 2nd ionization electrode 2 and the 2nd dust collection part which consists of the 2nd dust collection electrode 4 and the fan 6 which have a larger surface area than the 1st dust collection electrode are provided. The dust collecting capability is improved by driving the fan 6 only when the smoke sensor 8 detects that the air pollution is high.

Description

Air purifier

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a partial sectional front view of an air purifying apparatus according to a first embodiment of the present invention.

2 is a longitudinal sectional view of the air cleaning device of FIG.

3 is a cross-sectional view showing a portion corresponding to line A-A in FIG.

4 is a cross-sectional view showing a portion corresponding to line B-B in FIG.

5 is an electric circuit diagram of the air cleaning device of FIG.

6 is an electric circuit diagram of the air cleaning apparatus according to the second embodiment.

7 is a partial cross-sectional front view of the air cleaning apparatus according to the third embodiment.

8 is a partial cross-sectional front view of the air cleaning apparatus according to the fourth embodiment.

9 is a partial cross-sectional front view of the air cleaning apparatus according to the fifth embodiment.

* Explanation of symbols for main parts of the drawings

1, 2: ionization electrode 3, 4, 5: dust collecting electrode

6: fan 10: cylindrical portion

[Technical Field to which the Invention belongs and Prior Art in the Field]

The present invention relates to an air purifier of a type in which dust is ionized and collected.

Corona discharge is generated between the ionizing electrode and the collecting electrode to ionize dust floating in the air, i.e., micro particles (e.g., dust, bacteria, viruses, dust mites secretion, pollen, etc.), and the ionized dust The apparatus which makes it adsorb | suck to the dust collection sheet arrange | positioned at the front surface of a dust collection electrode by moving to a dust collection electrode direction is known as an ion type, an electrostatic type, or an electronic air purifier.

Moreover, the electric dust collector of the structure which arrange | positioned the dust collection electrode with a filter in the air path formed by forcibly generating the flow of air by a fan is also known.

However, conventional electrostatic air purifiers that do not have a fan, such as the former, generally have a drawback of being unable to quickly remove tobacco smoke and the like. Further, the electrostatic precipitator having the latter fan can easily remove relatively large particles, but has a drawback that it is difficult to remove them sufficiently because micro particles easily pass through the dust collecting electrode because the air volume is relatively large.

[Technical problem to be achieved]

Accordingly, it is an object of the present invention to provide an air cleaning apparatus capable of obtaining dust collecting capability according to changes in the environment.

[Configuration and Function of Invention]

In order to achieve the above object, the present invention provides a first dust collecting unit including a first ionizing electrode and a first dust collecting electrode, a second ionizing electrode, a second dust collecting electrode having a larger surface area than the first dust collecting electrode, and the first collecting electrode. An air passage forming member for forming a second air passage different from the first air passage of the dust collecting portion, and a second dust collecting portion having a fan for forcibly forming a flow of air in the second air passage; The present invention relates to an air cleaning device having a selective driving means for driving the engine.

In addition, as described in claim 2 or 3, it is preferable that the selective driving means is configured to drive the entire second dust collecting part when the air pollution degree is high.

In addition, as described in claim 5, ionization electrodes can be commonly provided in the first and second dust collecting electrodes disposed in the first and second air passages.

In addition, as described in claims 6 and 7, in the invention of claim 5, it is preferable to drive the fan when the degree of air pollution is high. In addition, it is preferable to provide a third dust collecting electrode.

1. Next, with reference to FIGS. 1-5, the air cleaning apparatus which concerns on 1st Example of this invention is demonstrated. The air purifier includes first and second ionization electrodes 1 and 2, first, second and third dust collecting electrodes 3, 4, and 5, a fan 6, a motor 7, and a smoke sensor ( 8), an activated carbon filter 9, a cylindrical cylindrical portion 10 having insulation, an insulating substrate 11, and a cover 12 formed with a slit.

The first ionization electrode 10 is a cathode (cathode) to which a negative voltage is applied, and is formed in an annular shape, and a plurality of needle-shaped protrusions 1a are formed to generate corona discharge, and the cylindrical portion 10 is wetted. The first ionization electrode 1 can of course be disposed on the substrate 11.

The second ionization electrode 2 is formed in an annular shape, disposed inside the cylindrical portion 10, and supported by the substrate 11. The second ionization electrode 2 is also a cathode to which a negative voltage is applied, and has a plurality of needle-shaped protrusions 2a for generating corona discharge.

The positive electrode 1st dust collection electrode 3 to which the positive voltage was applied is a strip | belt-shaped metal plate, wound around and fixed to the outer peripheral surface of the cylindrical cylinder part 10. A plurality of small holes 13 are formed in the first dust collecting electrode 3 to improve dust collecting performance.

The second dust collecting electrode 4 of the positive electrode to which the positive voltage is applied has a honeycomb using an aluminum plate, as shown in FIG. 3 without a thickness in order to produce a larger surface area than the first dust collecting electrode 3. It is formed in the shape of a honey comb. Accordingly, the second dust collecting electrode 4 is formed with a plurality of air passages 14 having a hexagonal cross-sectional shape extending in the vertical direction. The 2nd dust collecting electrode 4 is arrange | positioned inside the cylindrical cylinder part 10, and is fixed and attached by the fixture 15. As shown in FIG.

The third dust collecting electrode 5 is located between the first ionizing electrode 1 and the first dust collecting electrode 3 and is fixedly attached to the outer circumferential surface of the cylindrical cylindrical portion 10. The third dust collecting electrode 5 is formed in an annular shape so as to surround the cylindrical cylindrical portion 10 and is set to a lower voltage or ground than the first and second dust collecting electrodes 3 and 4.

A dust collecting paper 16 made of a kitchen towel or paper towel, which is a flexible dust collecting sheet, is wound on the first and third dust collecting electrodes 3 and 5, and the holding member 17 It is fixed by.

The fan 6 is disposed on the second dust collecting electrode 4 and the activated carbon filter 9 in the cylindrical cylindrical portion 10 with the motor 7, and is attached to the cylindrical portion by the attachment member 7a. 10) is supported. The motor 7 for driving the fan 6 rotates as an output indicating the state of high air pollution is generated from the smoke sensor 8 attached to the cylindrical portion 10.

The cover 12 is for improving the appearance, protecting the inside, and stabilizing air pollution. A plurality of openings for securing air pollution, that is, slits 18 are formed on the side and the top surface, and the substrate 11 It is supported so that it can be attached and detached.

The air purifier of this embodiment has a first air passage indicated by an arrow 19 on the outside of the cylindrical cylindrical portion 10 functioning as an air passage forming member, and a second air passage indicated by an arrow 20 on the inside. Has The first dust collector is substantially independently formed by the first ionization electrode 1 and the first and third dust collector electrodes 3, 5 disposed along the first air passage outside the cylindrical cylinder portion 10. The second dust collecting part is formed substantially independently by the second ionizing electrode 2, the second dust collecting electrode 4, and the fan 6 arranged along the second air passage inside the cylindrical cylindrical portion 10. have. Moreover, many opening parts 21 are provided in the lower part of the cylindrical cylinder part 10 so that the 2nd air path 20 may be formed.

5 shows an electrical circuit of the air cleaning device of FIG. The power supply circuit 22, which is disposed inside the substrate 11, includes a boost rectification circuit, and is, for example, -6 kV and the first dust collecting electrode 3 to the first and second ionizing electrodes 1 and 2. + 6kV), + 9kV to the second dust collecting electrode 4, and 0V to the third dust collecting electrode 5 are always applied. The motor 7 for rotating the fan 6 is connected to the power supply terminal 24 via the switch 23. For example, the control terminal of the switch 23 made of a transistor is connected to the smoke sensor 8, and is turned on in accordance with an output indicating that the amount (air pollution) of the smoke sensor 8 is equal to or greater than a predetermined amount.

When the output of the smoke sensor 8 indicates an amount of smoke of less than a predetermined amount, that is, in a low pollution state, since the switch 23 is off and the fan 6 is not driven, the arrow 20 The flow of air from below the second air passage shown upwards is hardly generated. In such a low pollution state, a normal voltage is applied to the first and second ionization electrodes 1 and 2 and the first, second and third dust collecting electrodes 3, 4 and 5. Therefore, the first dust collecting part consisting of the first ionizing electrode 1 and the first and third dust collecting electrodes 3 and 5 operates normally, and the first ionizing electrode 1 and the first and third dust collecting which act as a cathode Corona discharge is formed between the electrodes 3, 5, and a large amount of electrons are emitted from the first ionization electrode 1 toward the first and third dust collecting electrodes 3, 5. Electrons emitted by the corona discharge anionize air molecules (particularly oxygen molecules). Dust suspended in air (eg, dust, bacteria, viruses, dust mites secretions, pollen, etc.) receives electrons from negative ions and becomes negatively charged particles, ie anionized dust. Since the first and third dust collecting electrodes 3 and 5 have a high potential when the first ionizing electrode 1 is referred to, they are in a positively charged state, and the anionized dust and the collecting electrodes 3 and 5 are negative. The Coulomb force acts between the positive charges of the negative ions, and the anionized dust moves toward the dust collecting electrodes 3 and 5, is adsorbed by the dust collecting region 16, and the unipolar ions under the direct electric field move in a specific direction, that is, Ionic wind is generated. Accordingly, ion wind is generated from the first ionization electrode 1 toward the first and third dust collecting electrodes 3 and 5. That is, the ion wind is generated from the lower side to the upper side, and the third dust collecting electrode 5 disposed in the middle portion of the first ionizing electrode 1 and the first dust collecting electrode 3 not only achieves a uniform distribution of potentials. It also works to produce ionic winds well. Since the dust collecting region 16 is replaceable, it is newly replaced in the case of severe contamination. In the present embodiment, since the first dust collecting electrode 3 is formed to have a larger area than the conventional one, the dust can be adsorbed on the entire surface of the dust collecting paper 16 with good uniformity. Moreover, since the small hole 13 is formed in the 1st dust collection electrode 3, when the dust collecting paper 16 is wound up and affixed on it, the dust collecting paper 16 will be in the state which penetrates the small hole 13. As shown in FIG. The surface area of the dust collecting paper 16 is increased, and the effect of preventing peeling of adhered dust is obtained.

The fan 6 of the second dust collecting part is not driven in the low pollution state, but a predetermined voltage is applied to the second ionizing electrode 2 and the second dust collecting electrode 4. However, since it is surrounded by the cylindrical cylindrical part 10, the amount of indoor air which flows in into the 2nd air path shown by the arrow 20 is very small, and a big dust collection action does not arise in this state. In addition, although corona discharge and anionization occur between the second ionization electrode 2 and the second dust collecting electrode 4, the ion wind does not occur very well over a wide range. Therefore, when the fan 6 is in the non-driven state in the low pollution state, the second dust collecting part may be regarded as a substantially stopped state. Since the fan is not driven in a low pollution state, a gentle dust collection effect can be obtained without noise.

On the other hand, when a high degree of contamination is detected through the sensor 8, and the switch 23 is turned on and the fan 6 is composed, the inside of the cylindrical cylindrical portion 10 is depressurized, whereby Air flows in through the opening part 21 formed below the cylindrical cylinder part 10, and flows from below to upward. As a result, the ionized dust adjacent to the second ionization electrode 2 moves on the surface of the second dust collecting electrode 4 along the flow of the forcibly generated air, and is adsorbed by the second dust collecting electrode 4. At this time, since the flow of air is forcibly generated, it is suppressed that the ionized dust is polarized to be adsorbed only below the second dust collecting electrode 4, and is also adsorbed upward. Since the second dust collecting electrode 4 has a much larger surface area than the first dust collecting electrode in a honeycomb state, it is possible to purify air having a high dust collection capacity and high pollution in a relatively short time.

In addition, since the second air passage generated by the fan 6 is separated from the first air passage indicated by the arrow 19, the dust attached to the dust collector 16 is peeled off by the fan 6 being driven. There is no such thing.

In addition, since the second dust collecting electrode 4 has a large area and the use time is short, the progress of contamination is relatively slow. Therefore, it is good to separate and clean about once a year.

2. Next, referring to Fig. 6, the air cleaning apparatus of the second embodiment will be described. However, the mechanical configuration of the air cleaning apparatus according to the second embodiment is the same as that of Figs. Therefore, in FIG. 6, the same code | symbol is used for the part substantially the same as FIG.

In FIG. 6, the first power supply circuit 22a, the second ionization electrode 2, and the second dust collecting electrode 4 for the first ionizing electrode 1, the first and third dust collecting electrodes 3 and 5 are shown. 2nd power supply circuit 22b for each is provided, and it is comprised so that it may be controlled by the output of the smoke sensor 8. As shown in FIG. In other words, when the output of the smoke sensor 8 indicates that the air pollution degree is low, the first power supply circuit 22a is driven on, and the first ionizing electrode 1 and the first and third dust collecting electrodes 3 and 5 are turned on. A predetermined voltage is applied to the second power supply circuit 22b so that the voltage of the second ionizing electrode 2 and the second dust collecting electrode 4 becomes 0, and the switch 23 is also driven off. The fan 6 is in a non-driven state.

On the other hand, when the output of the smoke sensor 8 indicates that the air pollution degree is high, the first power supply circuit 22a is controlled to be off, the first dust collector is in a non-driven state, and the second power supply circuit 22b is At the same time as it is driven off, the switch 23 is turned on, and the dust collecting operation is started by the second dust collecting part composed of the second ionization electrode 2, the second dust collecting electrode 4, and the fan 6. Also in the second embodiment, the dust collecting action of the first and second dust collectors is almost the same as that of the first embodiment, and thus, the same effect as that of the first embodiment can be obtained.

3. Next, referring to Fig. 7, the air cleaning apparatus according to the third embodiment will be described. However, in Fig. 7 and Fig. 8 and Fig. 9 which will be described later, the same reference numerals are used for parts substantially the same as Fig. 1, and the description thereof is omitted.

In the air cleaning device of FIG. 7, the second ionization electrode 2 of FIG. 1 is omitted, and the opening 21 for obtaining the second air passage indicated by the arrow 20 is provided with the first ionization electrode 1 and the third. It is the same structure as FIG. 1 except that it moved between the dust collection electrodes 5. In FIG. 7, the ionization electrode 1 also serves as the second ionization electrode 2 of FIG. Therefore, the same effect as that of the first embodiment can be obtained also by the air cleaning apparatus of FIG. In addition, the electrical circuit of FIG. 7 is configured substantially the same as that of FIG.

4. The air cleaning apparatus of FIG. 8 omits the second ionization electrode 2 of FIG. 1, and moves the opening 21 between the third dust collecting electrode 5 and the first dust collecting electrode 3, except that FIG. It is configured identically to 1. In this case, it is driven along the power supply circuit of FIG. 5 and a predetermined voltage is always applied to the dust collecting electrode 5 of FIG. Most of the ionized dust generated by the corona discharge between the ionization electrode 1 and the third dust collecting electrode 5 flows along the first air passage indicated by arrow 19 when the fan 6 is not driven, When the fan 6 is driven, it flows along the second air passage indicated by the arrow 20. Therefore, the same effect as that of the first embodiment can be obtained also by the air cleaning apparatus of FIG.

Fifth Embodiment The air purifier of the fifth embodiment shown in Fig. 9 omits the second ionization electrode 2 from Fig. 1, and provides two openings 21a and 21b in place of the opening 21. Except for the above, the same configuration as that of FIG. The first opening 21a formed in the cylindrical cylindrical portion 10 is provided between the ionization electrode 1 and the third dust collecting electrode 5 in the same manner as in FIG. 7, and the second opening 21b is formed of the first opening 21a. It is provided between the third dust collecting electrode 5 and the first dust collecting electrode 3. Accordingly, similar effects to those of the first embodiment can be obtained by the air cleaning apparatus of FIG. 9 as in FIGS. 7 and 8.

[Modification]

This invention is not limited to the above-mentioned embodiment, For example, it can change as follows.

(1) An electrode which acts in the same manner as the third dust collecting electrode 5 can be provided between the second ionizing electrode 2 and the second dust collecting electrode 4 in the cylindrical cylindrical portion 10. In addition, the third dust collecting electrode 5 of FIG. 1 may be omitted.

(2) The first ionizing electrode 1 and the first and third dust collecting electrodes 3 and 5 are disposed inside the cylindrical cylindrical portion 10, and the second ionization is disposed outside the cylindrical cylindrical portion 10. The electrode 2, the second dust collecting electrode 4, and the fan 6 are disposed, and the cylindrical cylindrical portion 10 and the cover by the fan 6 are adjusted by adjusting the position of the slit 18 of the cover 12. It is possible to form a forced air flow between (12).

(3) In each embodiment, a filter may be disposed below the second dust collecting electrode 4 to remove relatively large particles or garbage.

(4) The voltage values of the first and second ionization electrodes 1 and 2 and the first to third dust collecting electrodes 3 to 5 can often be changed.

[Effects of the Invention]

In the invention of each claim, in addition to the first dust collecting electrode, a second dust collecting electrode having a larger surface area is provided, and is formed to generate an air flow of the second dust collecting electrode by a fan. Since the second dust collecting electrode has a relatively large area, the effect of adsorbing the ionized dust with the flow of the ion wind decreases, but the dust collection ion exhibits high dust collecting performance because the flow of the ionized dust is forcibly formed by the fan. Therefore, if the fan is driven when the air pollution is high due to cigarette smoke or the like, the air can be purified by the second dust collecting electrode in a relatively short time. When the air pollution is not severe, since the dust is collected by the first dust collecting electrode, the driving of the fan can be stopped and noise generated when the fan is driven can be prevented.

In addition, as described in claims 2, 3, 6, and 7, the installation of the sensor makes it possible to automate the driving of the fan.

In addition, as described in claim 5, when the ionization electrode is provided in common with the first and second dust collecting electrodes, the configuration is simplified.

Further, as described in claims 4 and 8, when the third dust collecting electrode is provided, not only can generate ions satisfactorily but also can generate ionic wind satisfactorily.

Claims (8)

A first dust collecting part including a first ionizing electrode and a first dust collecting electrode, a second dust collecting electrode having a larger surface area than the second ionizing electrode and the first dust collecting electrode, and a first air passage different from the first air passage of the first dust collecting part; A second dust collecting part having an air passage forming member for forming an air passage, a fan for forcibly generating a flow of air in the second air passage, and at least a selective driving means for selectively driving the fan; One air cleaning device. The method of claim 1, wherein the selection driving means drives the first and second ionization electrodes and the first and second dust collecting electrodes according to a sensor for detecting air pollution and an output indicating that the air pollution degree of the sensor is low. At the same time, the fan is set to a non-driven state, and the entire first dust collector is set to a driving state or a non-driven state according to an output indicating that the air pollution of the sensor is high. Air cleaning device having a means for driving. The method of claim 1, wherein the selection driving means drives the first dust collecting part according to a sensor for detecting air pollution and an output indicating that the air pollution degree of the sensor is low, and at the same time, the entire second dust collecting part is not driven. And a means for setting the first dust collecting unit to a driving state or a non-driving state according to an output indicating that the air pollution degree of the sensor is high, and setting the entire second dust collecting unit to a driving state. Air cleaning device. 4. The device of claim 1 or 2 or 3, further comprising: a third dust collecting electrode disposed between the first ionizing electrode and the first dust collecting electrode and to which a voltage lower than that of the first dust collecting electrode is applied to ground; And a means for arranging the dust collecting sheet to cover the first dust collecting electrode. An ionization electrode, a first dust collecting electrode, a second dust collecting electrode having a larger surface area than the first dust collecting electrode, a first air passage from the ionizing electrode to the first dust collecting electrode, and the second collecting electrode from the ionizing electrode; A holding for holding an air passage forming member disposed between the first dust collecting electrode and the second dust collecting electrode to form a second air passage leading to the dust collecting electrode, and a sheet for collecting dust arranged to cover the first dust collecting electrode; A member, a fan for forcibly allowing air to flow in said second air passage, and at least a selection driving means for selectively driving said fan. The method of claim 5, wherein the selection driving means drives the ionization electrode and the first and second dust collecting electrodes according to the sensor for detecting the flow of air and the output indicating that the air pollution degree of the sensor is low, The fan is set to a non-driven state and the ionization electrode, the second dust collecting electrode, and the fan are driven according to an output indicating that the air pollution degree of the sensor is high, and the first dust collecting electrode is driven or not driven. And a means for setting to a state. The method of claim 5, wherein the selection driving means drives the ionization electrode and the first dust collecting electrode according to the sensor for detecting the air pollution and the air pollution level of the sensor, and the second dust collecting device. The electrode and the fan are set to a non-driven state, and the ionization electrode, the second dust collecting electrode, and the fan are driven at the same time as the output indicating that the air pollution degree of the sensor is high, and the first dust collecting electrode is driven or And a means for setting it to a non-driven state. The ionization electrode and the first and second dust collecting electrodes of claim 5, 6, or 7, wherein a third dust collecting electrode to which a voltage lower than that of the first and second dust collecting electrodes is applied based on ground is applied. Air cleaning device, characterized in that disposed between. ※ Note: The disclosure is based on the initial application.