KR19980018669A - Air purifier - Google Patents

Abstract

In the electronic air purifier, generation of ozone is suppressed without lowering the dust collection effect.

At the same time as the ionization electrode 1 is provided, the first and second dust collecting electrodes 2 and 3 are disposed on the outer circumferential surface of the cylindrical support 4. -4 kV is applied to the ionization electrode 1. +2 kV is applied to the first dust collecting electrode 2. +8 kV is applied to the second dust collecting electrode 3. Voltage is applied to the ionization electrode 1 and the second dust collection electrode 3 in an offset state, and the absolute value of the negative voltage of the ionization electrode 1 is lower than the absolute value of the positive voltage of the second dust collection electrode 3.

Description

Air purifier

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

A conventional air purifier includes an ionization electrode (cathode) 1 to which -6 kV is applied, as shown in FIGS. 1 and 2, for example, a first dust collecting electrode 2 that is a ground potential, and an example. For example, the second dust collecting electrode 3 to which 6 kV is applied is provided. The ionization electrode 1 is formed in a cylindrical shape and has a plurality of needle-like protrusions 1a. In addition, the surface area of the protrusion 1a is smaller than the surface areas of the first and second dust collecting electrodes 2, 3. The 1st and 2nd dust collecting electrodes 2 and 3 are strip | belt-shaped metal plates, and are wound in the round ring shape on the surface of the insulating support body 4 whose diameter is smaller than the cylinder of the ionization electrode 1, and is cylindrical. The first dust collecting electrode 2 is disposed near the ionization electrode 1, and the second dust collecting electrode 3 is disposed at a position away from the first dust collecting electrode 2 with respect to the ionizing electrode 1.

In the hollow part 5 of the cylindrical support body 4, the dust collecting paper 6 which has insulation and flexibility, and functions as a dust collecting sheet is wound and accommodated in roll shape. In addition, a shaft 7 for determining a position so that the roll-shaped dust collector 6 can be rotated is provided, and the dust collector 6 is held on the wall surface of the cylindrical support 4 from the hollow portion 5. The groove 8 for pulling is provided. The dust collecting paper 6 is wound around the entire outer circumferential surface of the cylindrical support 4 so as to cover the first and second dust collecting electrodes 2, 3 coming out of the groove 8, and the cylindrical support (not shown). 4) is fixed. The ionization electrode 1 is fixedly attached to the table-like insulating support 9. A plurality of pillars 10 are provided on the table-like support 9 to determine the position of a cover (not shown) provided with a plurality of slits serving as air passages. In addition, the table-like support 9 supports the cylindrical support 4.

The ionization electrode 1 and the first and second dust collecting electrodes 2, 3 are connected to the power supply circuit shown in FIG. The power supply circuit is a ring choke converter, for example, a DC power supply 11 consisting of a rectifying smoothing circuit connected to a commercial AC power supply and a pair of output terminals of the DC power supply 11. Multiple back pressure connected to the primary coil 13 of the transformer 12, the transistor 14 connected in series with the primary coil 13, and functions as a switching element, and the secondary coil 15 of the transformer 12 It consists of the rectifier circuit 16, the tertiary coil 17 of the transformer 12, and the control circuit 26. As shown in FIG. The multi-back voltage rectifying circuit 16 consists of six diodes D1 to D6, six capacitors C1 to C6, and five resistors R1 to R5. The output line 18 of the resistor R3 is connected to the second dust collecting electrode 3, the output line 19 of the resistor R 4 is connected to the first dust collecting electrode 2, and the The output line 20 is connected to the ionization electrode 1.

The control circuit 26 controls the base current of the transistor 14 so as to obtain a constant voltage output voltage according to the voltage of the tertiary coil 17. The transistor 14 is turned on and off similarly to the well-known ring choke converter.

When -6 kV is applied to the ionization electrode 1, 0 V is applied to the first dust collecting electrode 2, and +6 kV is applied to the second dust collecting electrode 3, the ionizing electrode 1 and the first and second dust collecting electrodes acting as cathodes. Corona discharge occurs between (2, 3), and a large amount of electrons are emitted from the ionization electrode 1 toward the first and second dust collecting electrodes 2,3. 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 second dust collecting electrodes 2 and 3 have a high potential when the ionizing electrode 1 is a reference, they are in a positively charged state, and the anionized dust and the collecting electrodes 2 and 3 are negative. The Coulomb force acts between the positive charges of the negative electrode, and the anionized dust moves toward the dust collecting electrodes 2 and 3 and is adsorbed by the dust collecting sheet 6 wound on the outer circumferential surface of the cylindrical support 4. In addition, a phenomenon in which unipolar ions move under a direct current field in a specific direction, that is, ion wind occurs. Therefore, in the apparatus of FIGS. 1 and 2, ion wind is generated from the ionization electrode 1 toward the first and second dust collecting electrodes 2 and 3. That is, ion wind is generated from below the cylindrical support body 4 upward. In addition, the first dust collecting electrode 2 disposed in the middle portion between the ionizing electrode 1 and the second dust collecting electrode 3 not only achieves uniform distribution of electric potential, but also serves to generate ionic wind satisfactorily.

By the way, in the air cleaner, when the voltage of the ionization electrode 1 and the dust collection electrodes 2 and 3 is raised, corona discharge will generate | occur | produce well and ionization of dust will be promoted, but ozone will generate | occur | produce more than necessary, and ozone Odor is a problem. In addition, when the voltage between the ionization electrode 1 and the second dust collecting electrode 3 is increased, a high breakdown voltage is required for the electric circuit portion, resulting in an increase in the cost for the apparatus.

In addition, in the electrostatic air purifier, since ionized dust is transported according to the ion wind, it is important to generate the ion wind satisfactorily and to increase the dust collecting capability.

Accordingly, it is an object of the present invention to provide an air cleaning apparatus capable of improving the dust collecting capability without raising the voltage between the ionizing electrode and the dust collecting electrode, and suppressing the amount of ozone generation without causing a decrease in the dust collecting capability.

1 is a perspective view showing a conventional air cleaning device.

FIG. 2 is a circuit diagram illustrating a conventional air cleaning device together with a longitudinal sectional view of a portion of FIG. 1.

3 is a perspective view showing the air cleaning device of the first embodiment.

FIG. 4 is a circuit diagram showing the air cleaning device of the first embodiment with a longitudinal sectional view of a portion of FIG. 3.

FIG. 5 is a view cut along the line A-A of FIG. 6 showing the air cleaning apparatus of the second embodiment.

FIG. 6 is a plan view of the air cleaning device of FIG. 5.

FIG. 7 is a circuit diagram showing the air cleaning device of the third embodiment with a longitudinal sectional view of a portion of FIG. 3.

FIG. 8 is a circuit diagram showing the air cleaning device of the fourth embodiment with a longitudinal sectional view of a portion of FIG. 3.

FIG. 9 is a circuit diagram showing an air cleaning apparatus of a fifth embodiment with a longitudinal cross section of a portion of FIG. 3.

* Description of the symbols for the main parts of the drawings *

1: ionization electrode 2: first dust collecting electrode

3: second dust collecting electrode 4: support

6: dust collector

In order to achieve the above object, the present invention is provided with a support of an ionizing electrode, a dust collecting electrode, the ionizing electrode and a dust collecting electrode, and dust is placed on the dust collecting sheet by arranging the dust collecting sheet to be in contact with the surface of the dust collecting electrode. An air purifier having an adsorption structure, wherein the absolute value of the negative voltage of the ionization electrode and the absolute value of the positive voltage of the dust collecting electrode have different values.

In addition, it is preferable to provide the first and second dust collecting electrodes as described in claim 2.

In addition, as described in claim 3, it is preferable to offset so that the absolute value of the positive voltage of the second dust collecting electrode becomes higher than the absolute value of the negative voltage of the ionizing electrode, and apply a positive voltage to the first dust collecting electrode.

Further, for the purpose of generating the ion wind satisfactorily, as described in claim 4, the absolute value of the negative voltage of the ionization electrode can be made larger than the absolute value of the positive voltage of the second dust collecting electrode.

Further, as described in claim 5, the potential difference between the ionization electrode and the first dust collecting electrode is made larger than the potential difference between the first and second dust collecting electrodes, and the surface area of the second dust collecting electrode is made larger than the surface area of the first dust collecting electrode. Can be.

First embodiment

Next, the electronic air cleaning apparatus of the first embodiment according to the present invention will be described with reference to FIGS. 3 and 4. However, in FIG.3 and FIG.4, about the part which is substantially the same as FIG.1 and FIG.2, the same code | symbol is used and the description is abbreviate | omitted.

Since the mechanical configuration of the air cleaner of the first embodiment shown in FIG. 3 is the same as that of FIG. 1 except that the area and vertical length of the second dust collecting electrode 3 are larger than that of FIG. 1, the mechanical configuration of the air cleaner is shown in FIG. Description of the description is omitted. The surface area of the second dust collecting electrode 3 is about 7 times, which is at least three times that of the first dust collecting electrode 2, and the sum of the surface areas of the first and second dust collecting electrodes 2, 3 is equal to the outer surface area of the support 4. More than 50%. In addition, in FIG. 4, the parts other than the rectifier circuit 16a are comprised similarly to FIG. 2, and most of the rectifier circuits 16a shown in FIG. 4 are comprised identically to the rectifier circuit 16 of FIG. have. That is, the rectifier circuit 16a of FIG. 4 omits the capacitor C5 and the diode D6 from the rectifier circuit 16 of FIG. 2, except that the capacitor C7 and the diode D7 are added. It is configured in the same way. For this reason, in FIG. 4, the anode of the diode D5 is directly connected to the left end of the resistor R5. The new capacitor C7 is connected to the right end of the capacitor C1. The diode D7 is connected between the cathode of the diode D3 and the right end of the capacitor C7. The cathode of the diode D7 is connected to the left ends of the resistors R3 and R4, respectively.

In the present embodiment, -4 kV is supplied to the ionization electrode 1 based on the ground, +2 kV is supplied to the first dust collecting electrode 2, and +8 kV is supplied to the second dust collecting electrode 3. Therefore, the voltage between the ionization electrode 1 and the second dust collection electrode 3 is 12 kV, which is the same as that of FIG. 2, but the absolute value of negative voltage −4 kV of the ionization electrode 1 and the +8 kV of the second dust collection electrode 3. The absolute value becomes a different value, and a voltage is supplied in an offset state, that is, an eccentric state.

The air purifier of this embodiment has the following advantages.

(1) The voltage difference between the ionization electrode 1 and the second dust collection electrode 3 is 14 kV as in the prior art, but since the voltage of the ionization electrode 1 with respect to the ground can be lowered by 2 kV than before, the generation of ozone is suppressed. can do.

(2) In order to supply the voltage in the offset state, the voltage of the first dust collecting electrode 2 becomes + 2kV. Therefore, in the region where the ionized dust is distributed, there are four potentials such as -4 kV and ground potential of the ionization electrode 1 and +2 kV and +8 kV of the first and second dust collection electrodes 2 and 3, The potential gradient becomes good, and the ion wind flows smoothly.

(3) Although the voltage difference between the ionization electrode 1 and the 2nd dust collection electrode 3 is the same as before, since the voltage of the 2nd dust collection electrode 3 is + 8kV higher than the prior art, dust collection force becomes high. This makes it possible to use, for example, long, thick paper such as cooking paper as the dust collecting paper 6, and makes it possible to collect dust well using the length of the hair.

(4) Since the surface area and the vertical length of the second dust collection electrode 3 are formed at about seven times that of three times or more of the surface area and the vertical length of the first dust collection electrode 2, the dust collection range by the coulomb force is expanded, Dust collection efficiency is improved.

Second embodiment

Next, an electronic air cleaning apparatus as a second embodiment will be described with reference to FIGS. 5 and 6. However, in FIG. 5 and FIG. 6, the same code | symbol is attached | subjected to the substantially same part as FIGS. 1-4, and the description is abbreviate | omitted. 5 and 6 show the ionizing electrode 1, the first and second dust collecting electrodes 2 and 3, the support 4, and the ionizing electrode support 9 in the shape of FIG. And those shown in FIG. 3. However, the functions of the respective parts shown in FIGS. 5 and 6 are substantially the same as those shown by the same reference numerals in FIGS. 1 and 3. 5 and 6, the ionization electrode 1 is composed of two linear conductors, and the first and second dust collecting electrodes 2, 3 are made of a strip-shaped metal plate extending in a straight line shape and insulating. The support body 4 is formed so that the surface may become circular arc shape. The pair of linear ionization electrodes 1 are supported by a pair of plate-like supports 9 opposed to each other. One of the two first dust collecting electrodes 2 is disposed on one inclined surface of the support 4, and the other of the two first dust collecting electrodes 2 is disposed on the other inclined surface of the support 4. have. One of the two second dust collecting electrodes 3 is disposed on one inclined surface of the support 4, and the other of the two second dust collecting electrodes 3 is disposed on the other inclined surface of the support 4. have. The second dust collecting electrode 3 is formed with a larger area than the first dust collecting electrode 2 and has a small hole 24. In addition, -4 kV is applied to the ionization electrode 1 of FIG. 5 and FIG. 6, +2 kV is applied to the 1st dust collecting electrode 2, and +8 kV is applied to the 2nd dust collecting electrode 3. As shown in FIG. The surface fitting system of the first and second dust collecting electrodes 2 and 3 is set to about 50% or more of the area where the dust collecting paper is disposed on the surface of the arc-shaped support 4.

Also in the second embodiment, since the voltage is applied to the ionization electrode 1 and the second dust collecting electrode 3 in an offset state, the same effect as that of the first embodiment can be obtained.

In addition, when the small hole 24 is provided, a part of the dust collecting paper having a flexibility such as a paper towel is dug into the small hole 24, so that the surface area capable of collecting dust is increased and the dust collecting effect is increased, and adsorption is performed. The dust becomes difficult to peel off from the dust collecting paper.

In addition, since the area of the second dust collecting electrode 3 is large and the voltage is increased by the offset, the adsorption area of the dust due to the coulomb force is increased, and the dust is strongly adsorbed. In addition, since the distribution of dust is uniformly expanded in the dust collecting place, the adsorbed dust is hard to peel off.

Third embodiment

Next, the air cleaning apparatus of the third embodiment will be described with reference to FIG. However, in FIG. 7, the same code | symbol is used for the substantially same part as FIG. 4, and the description is abbreviate | omitted. The air purifier of FIG. 7 has a rectifier circuit 16b different from that of FIG. 4, the voltage of the ionizing electrode 1 is -8 kV, the voltage of the first dust collecting electrode 2 is -1 kV, and the second dust collecting electrode 3. It is configured similarly to FIG. 4 except for changing the voltage of + 6kV.

Even when the absolute value of the voltage of the ionization electrode 1 is offset to be higher than the absolute value of the voltage of the second dust collecting electrode 3 as in the air cleaning device of FIG. 7, ion wind can be generated satisfactorily and the dust collection efficiency can be improved. . Moreover, since the absolute value of the negative voltage of the ionization electrode 1 becomes high, it will become easy to generate | occur | produce ozone, and therefore may be utilized when ozone is required. In the present embodiment, the potential difference between the ionization electrode 1 and the first dust collecting electrode 2 is higher than that of FIG. 4, and the potential of the second dust collecting electrode 3 is lower than that of FIG. 4. For this reason, strong ion wind is generated between the ionization electrode 1 and the 1st dust collection electrode 2, and dust can be conveyed to the upper side of the support body 4, and dust collection efficiency improves. In addition, since the potential of the second dust collecting electrode 3 is lower than that in FIG. 4, adhesion of dust to a wall or the like in the vicinity thereof can be reduced.

Fourth embodiment

The air purifying device of FIG. 8 includes the rectifier circuit 16c configured to apply -6 kV to the ionization electrode 1, +1 kV to the first dust collecting electrode 2, and +6 kV to the second dust collecting electrode 3, except that the rectifier circuit 16c is applied. It is comprised similarly to 1st Example.

In FIG. 8, the potential difference between the ionization electrode 1 and the second dust collection electrode 2 is greater than the potential difference between the first and second dust collection electrodes 2 and 3. Therefore, strong ion wind can be generated between the ionization electrode 1 and the 1st dust collection electrode 2, and the effect | action of an ion wind can be propagated to the upper side of the support body 4. As shown in FIG. Thus, the dust collection efficiency can be improved without increasing the potential of the second dust collecting electrode 3. In addition, in this embodiment, since the potential of the second dust collecting electrode 3 is low, adhesion of dust to a wall or the like in the vicinity can be reduced.

Fifth Embodiment

The air purifier of FIG. 9 is a rectifier circuit (voltage circuit) 16d to apply -8 kV to the ionization electrode 1, 0 V (ground) to the first dust collecting electrode 2, and +6 kV to the second dust collecting electrode 3. The same configuration as in the first embodiment is carried out except that This fifth embodiment has the same effects as the fourth embodiment. In addition, it is possible to increase the amount of ozone generated.

Variant

The present invention is not limited to the above embodiments, and the following modifications are possible, for example.

(1) -6 kV can be applied to the ionization electrode 1 and +9 kV can be applied to the second dust collecting electrode 3. In addition, -5 kV can be applied to the ionization electrode 1, +2 kV can be applied to the first dust collecting electrode 2, and +10 kV can be applied to the second dust collecting electrode 3. Furthermore, -10 kV can be applied to the ionization electrode 1, -2 kV can be applied to the first dust collecting electrode 2, and +5 kV can be applied to the second dust collecting electrode 3.

(2) The cylindrical second dust collecting electrode 3 shown in FIG. 1 can be manufactured to have holes 24 having a large area and a small area as in the second embodiment of FIGS. 4 and 5.

(3) The first dust collecting electrode 2 may be omitted.

According to the invention of claims 1 to 4, since the voltage is applied to the ionization electrode and the dust collecting electrode in an offset state, ion wind is generated satisfactorily.

Further, as described in claim 3, when the absolute value of the negative voltage of the ionization electrode is lowered and the absolute value of the positive voltage of the second dust collecting electrode is increased by that amount, the potential of the ionization electrode is lowered with respect to the ground, so that the amount of ozone is reduced. . In addition, by maintaining the potential difference between the ionizing electrode and the second dust collecting electrode as in the related art, it is possible to increase the dust collecting performance according to the second dust collecting electrode. That is, since the potential with respect to the ground of the 2nd dust collecting electrode becomes higher than before, the suction force of ionized dust becomes high, and dust collection performance improves. In addition, since the coulomb force can be strongly applied, a long hair and a thick paper (for example, cooking paper) can be used, and dust collection performance is improved. In addition, since the first dust collection electrode becomes a positive potential instead of the ground, both the ground potential and the potential of the first dust collection electrode exist between the ionization electrode and the second dust collection electrode, thereby allowing the ion wind to flow well.

According to the invention of claim 4, similarly to the invention of claim 3, the effect of generating a good flow of ion wind is obtained by the effect of voltage offset, and the effect of increasing the amount of ozone is obtained. In addition, in the place where a sterilization effect is required, it is good that a large amount of ozone is generated.

Further, according to the invention of claim 5, since the potential difference between the ionization electrode and the first dust collecting electrode becomes high, it is possible to generate strong ion wind, widen the working range of the ion wind, and increase the area of the second dust collecting electrode. In addition, the dust collection efficiency can be increased.

Claims (5)

An air cleaning apparatus having an ionizing electrode, a dust collecting electrode, a support of the ionizing electrode, and a dust collecting electrode, and configured to adsorb dust on the dust collecting sheet by arranging the dust collecting sheet so as to contact the surface of the dust collecting electrode. The absolute value of the negative voltage of the ionization electrode and the absolute value of the positive voltage of the dust collecting electrode has a different value. An air purifier having an ionizing electrode, a dust collecting electrode, a support of the ionizing electrode and a dust collecting electrode, and arranged to adsorb dust on the dust collecting sheet by arranging the dust collecting sheet to be in contact with the surface of the dust collecting electrode. The dust collecting electrode may include a first dust collecting electrode disposed near the ionizing electrode, and a second dust collecting electrode disposed farther from the first dust collecting electrode with respect to the ionizing electrode, and the absolute value of the negative voltage of the ionizing electrode and the The absolute value of the positive voltage of a 2nd dust collection electrode has a different value, The air cleaning apparatus characterized by the above-mentioned. The air purifier of claim 2, wherein an absolute value of the positive voltage of the second dust collecting electrode is greater than an absolute value of the negative voltage of the ionizing electrode, and a positive voltage is applied to the first dust collecting electrode. The air purifier of claim 2, wherein an absolute value of the negative voltage of the ionizing electrode is greater than an absolute value of the positive voltage of the second dust collecting electrode, and a negative voltage is applied to the first dust collecting electrode. An air cleaning apparatus having an ionizing electrode, a dust collecting electrode, a support of the ionizing electrode, and a dust collecting electrode, and configured to adsorb dust on the dust collecting sheet by arranging the dust collecting sheet so as to contact the surface of the dust collecting electrode. The dust collecting electrode includes a first dust collecting electrode disposed near the ionizing electrode, and a second dust collecting electrode disposed farther from the first dust collecting electrode with respect to the ionizing electrode, and between the ionizing electrode and the first dust collecting electrode. The potential difference is set larger than the potential difference between the first and second dust collecting electrodes, and the surface area of the second dust collecting electrode is set to three times or more of the surface area of the first dust collecting electrode. Air cleaning device.