KR100195534B1 - Air cleaner having electric dust collector - Google Patents

Abstract

The present invention relates to an air purifier for use in an indoor office, a home or a business, and in particular, dust that has a bad effect on the human body is collected by high voltage discharge, and high-pressure pulses are generated for indoor dust odors and gas smells that create discomfort. The present invention relates to a dust and gas removal device of an air purifier that provides a clean indoor space by deodorizing it.

Conventional air cleaners only remove dust with a high voltage output from the high-pressure generator, and there is a problem that a deodorization filter must be used separately to deodorize dust odor or gas smell.

The present invention is a dust and gas removal device of the air purifier that can be used semi-permanently without replacing the filter by performing dust removal and deodorization at the same time using the high pressure pulse output from the pulse generator.

Description

Air cleaner with electrostatic precipitator

The present invention relates to an air purifier used in an indoor office, a home or a business, and particularly, to collect dusts that have a bad effect on the human body by high voltage discharges, and to remove high-pressure pulses such as indoor dust smells and gas smells that create discomfort. It relates to an air purifier having an electrostatic precipitator that generates and deodorizes to provide a clean indoor space.

The configuration of a conventional air cleaner will be described with reference to FIGS. 1 to 3 as follows.

First, referring to FIG. 1, a suction inlet 1 through which air is introduced, a dust collecting filter 2 for discharging high pressure output from the DC high voltage generating unit 5, and dust collecting the dust, and the dust collecting filter 2. DC high voltage generation unit 5 for outputting high pressure to the high voltage, and a deodorizing filter 6 for deodorizing dust and gas smells in the air, and by rotating and forcibly introducing external air and purifying air. It consists of a fan (7) for discharging to the outside of the air cleaner, and a discharge port (8) through which the purified air is discharged.

The dust collecting filter 2 is composed of a collecting part 4 which collects dust having a charge while passing through an ionizing part 3 having a dust passing through the dust collecting filter 2 having a charge.

In addition, referring to FIG. 3, the ionization unit 3 of the dust collecting filter 2 faces a discharge electrode 3A for corona discharge at a high pressure output from the DC high voltage generator 5, and faces the discharge electrode 3A. It consists of a discharge-responsive electrode plate (3B) having an electrical polarity, the collecting unit 4 is applied to an electric field to the dust passing through the ionizing unit (3) at a high pressure output from the DC high voltage generator (5) A collection electrode having an acceleration electrode plate 4A for pushing dust to the collecting electrode plate 4B and an electrode facing the acceleration electrode plate 4A and collecting dust pushed out by the acceleration electrode plate 4A. It consists of board 4B.

In addition, referring to FIG. 2, the DC high voltage generator 5 may include a capacitor C4 charged and discharged with an input power, and a pulse (current) generated by charging and discharging the capacitor C4. A capacitor (C7) for double-voltage rectifying the coil (L1), the second coil (L2) where a high voltage is induced when a current flows in the first coil (L1), and the high voltage induced by the second coil (L2). C8) and the diodes (D5, D6), the third coil (L3) for sensing the current generated in the first coil (L1), and the slice of the pulse detected by the third coil (L3) The diodes D1 and D2, the capacitor C2 and the resistor R2, the transistor Q1 that is turned on and off by the sliced pulses, and the pulses that are output by the on and off operations of the transistor Q1. The capacitor C5, resistor R5, diode D3 to clamp, the diode D4 and capacitor C6 rectifying the clamped pulse, and a high signal input. It is composed of a photocoupler PC1 that outputs and a high output when the signal is low and a microcomputer 5A that determines whether the DC high voltage generator 5 is operated by the output of the photocoupler PC1. Reference numerals ZD1 and ZD2 are zener diodes, R1, R3, R4, R6, and R7 are resistors, and C1 and C3 are capacitors.

Referring to FIGS. 1 to 5, the operation of the conventional air purifier branch and the gas removing device is as follows.

First, the operation of the DC high voltage generator will be described with reference to FIG. 2. When a voltage of 12 volts DC is input through the resistor R1 and the capacitor C1, the capacitor C4 repeats the charging and discharging operation. The counter electromotive force is applied to one coil L1 when the capacitor C4 discharges, thereby generating a pulse signal.

Meanwhile, the high voltage is induced in the second coil L2 by the pulse signal generated by the first coil L1, and the third coil L3 is the voltage induced in the second coil L2 by the first coil. The pulse generated at L1 is sensed and output to the capacitor C2, the diodes D1 and D2, and the preceding term R2 forming the slice pouf.

The high voltage induced by the second coil L2 is back-pressured and rectified by the capacitors C7 and C8 and the diodes D5 and D6 and output to the dust collecting filter through the resistor R4.

The capacitor C2, the diodes D1, D2, and the resistor R2 forming the slice pouf slice the pulse sensed by the third coil L3 and output the sliced pulse to the base terminal of the transistor Q1.

At this time, the zener diode ZD1 restricts the voltage supplied to the transistor Q1 to a predetermined voltage or less, and the capacitor C3 removes the DC component of the voltage supplied to the transistor Q1, and the resistors R6, R7) adjusts the collector current of the transistor Q1 to adjust the potential difference between the emitter terminal and the collector terminal of the transistor Q1.

The transistor Q1 is turned on by the pulse signal input after being sliced, and is supplied to the capacitor C5, the resistor R5, and the diode D3 that form a clamping loop for the pulse detected by the third coil L3. The tone capacitor C5, the resistor R5, and the diode D3, each of which is output, and has a clamping loop, limit the maximum voltage of the pulse output from the transistor Q1 to a predetermined voltage or less. Output to D4).

At this time, the pulse inputted to the diode D4 is rectified by the diode D4 and smoothed by the capacitor C6 to be input to the photocoupler PC1 by the ON operation of the zener diode ZD2.

On the other hand, the photocoupler PC1 outputs a low signal when a high signal is input from the zener diode ZD2, and a high output when a low signal is input, so that the microcomputer 5A connected to the output terminal of the photocoupler PC1 generates a DC high voltage. It is possible to determine whether the operation of the unit (5).

The air cleaner including the DC high voltage generator 5 operating as described above operates as follows.

Dust is forcedly sucked by the rotation of the fan 6 and passes through the dust collecting filter 2 through the suction port 1, the dust is filtered and only the air passes through, and the dust collecting filter 2 is discharged by high pressure discharge It consists of an ionizing part (3) for applying charge to the dust passing through the filter (2) and a collecting part (4) for collecting the dust having a charge while passing through the ionizing part (3), the operation is as follows.

The high voltage output from the DC high voltage generator 5 is supplied to the discharge electrode 3A of the ionizing unit 3, and the discharge response plate 3B has an electrical polarity opposite to the discharge electrode 3A. When a high voltage corona discharge is performed at 3A, electric charges are transferred to the dust passing through the discharge electrode 3A and the discharge counter electrode plate 3B.

The dust that is charged while passing through the electric part 3 is transferred to the acceleration electrode plate 4A due to the electric field difference generated between the acceleration electrode plate 4A and the collecting electrode plate 4B of the collecting part 4. Attached.

At this time, the acceleration electrode plate 4A is applied with a voltage equal to or less than the voltage supplied to the discharge electrode 3A of the ionizing unit 3.

Therefore, the air from which dust is removed while passing through the dust collecting filter 2 is removed through the deodorizing filter 6 and the smell of dust or gas is removed to exit the air purifier through the outlet 8.

On the other hand, as in the Utility Model Publication No. 90-906 and Patent Publication No. 93-9719, the technology related to the air purifier is already known, the Utility Model Publication No. 90-896 is the strength of the electric field generated in the discharge electrode unit To improve the stream efficiency at the counter electrode part by increasing the projecting line which is bent and protrudes, and outputs the DC high voltage to the electrostatic precipitator composed of the ionizing part and the collecting part and discharges the output DC low voltage to collect dust. In the case of using such a DC high voltage, the high voltage is discharged to the fine particles (dust, etc.) in the room air that is forcedly sucked by the operation of the blower fan, so that the fine particles have an electric polarity and are collected at the collecting portion. Electric dust collection is possible.

In addition, Patent Publication No. 93-9719 generates a high current by using a spark gap of a direct current high voltage, and through the on / off of a mechanical contact by using a rotary spark gap switch. By generating a pulse fixed pressure, and by varying the size of the pulse high voltage generated through the rotary spark gap switch to output, by switching the impulse generator for outputting a high voltage and the DC high voltage generated by the impulse generator It is composed of a switch to output high voltage in the form of pulse.

The switch includes a plurality of fixed electrodes and a rotating electrode, and the plurality of classic electrodes and the rotating electrode are repeatedly turned on and off as fast as the rotational speed of the rotating electrode by the rotation of the rotating electrode. The high voltage is output to the pulse fixed voltage.

The output pulse high voltage is to solve the spark phenomenon generated when the DC high voltage continuously outputs a high voltage of a certain size or more, and can immediately apply a voltage higher than the DC voltage to generate a strong streamer corona discharge gas, etc. It has the effect of removing the particle rate, and can increase the dust collection efficiency compared to the DC charging method.

The conventional air cleaner that operates as described above only removes dust by the high voltage output from the DC high voltage generator, and there is a problem in that a deodorization filter must be used separately to deodorize the dust smell or gas smell.

In addition, Utility Model Publication No. 90-896 discloses that when the dust collection efficiency of electric dust collection is to be improved, the dust collection efficiency is proportional to the moving speed of the charged particles to the collecting electrode plate of the collecting unit. And the charge amount is proportional to the electric field strength of the discharge electrode. As a result, the dust collection efficiency is proportional to the magnitude of the DC high voltage output from the discharge electrode. There is a problem such as a fire caused a fatal loss to the lives or property, and there was a problem that can not remove various odor components contained in the indoor air by the DC voltage.

On the other hand, Patent Publication No. 93-9719 shows that the gas removal efficiency for the pulse high voltage is closely related to the generation period of the pulse high voltage, that is, the frequency, so that the larger the frequency, the better the gas removal efficiency, but the pulse generation by the rotary spark gap switch Since the frequency is determined by the rotational speed of the rotating electrode, the rotational speed of the motor for rotating the rotating electrode has a limit, which is limited to the frequency of several hundred Hz or more, when only the high voltage is applied to the ionizing part. Since ozone is generated in proportion to the height (size) of the generated pulse high voltage, ozone is harmful to the human body when its amount is excessive, and strong sparks are generated at the spark gap because the ozone is converted into a pulse by a discharge through the spark gap. Since discharge occurs, strong electromagnetic waves are generated at this time, so that electric appliances or appliances It acts as noise and can not ever the home is used as a noise in case of sparks there is a problem-free use for a long time such as wear of the spark gap electrodes.

Accordingly, an object of the present invention is to provide an air purifier capable of simultaneously removing dust, removing dust and gas, using a high voltage DC generator and a high voltage pulse generator.

1 is a block diagram of a conventional air cleaner.

2 is a circuit diagram of a conventional DC high voltage generator.

3 is a cross-sectional view of a conventional dust collecting filter.

4 is an output waveform diagram of a conventional DC high voltage generator.

5 is a view showing the configuration of a conventional air cleaner.

6 is a block diagram of an air cleaner of the present invention.

7 is a cross-sectional view of the dust collecting filter of the present invention.

8 is a circuit diagram of a pulse high voltage generator of the present invention.

9 is an output waveform diagram of the pulse high voltage generator of the present invention.

Referring to Figures 6 to 8 the configuration of the air cleaner of the present invention for achieving the above object is as follows.

First, a suction port 10 through which air is introduced, a dust collecting pump 11 which discharges high pressure output from the DC high voltage generator 14, and collects dust, and a collecting unit 13 of the dust collecting filter 11. And a high voltage DC generator 14 for outputting a high voltage to the pulse high voltage generator 15, and an ionization part of the dust collecting filter 11 by applying a high pressure pulse to a fixed pressure output from the DC high voltage generator 14. 12) a pulse high voltage win-win section 15 outputted to the output, a fan 16 for rotating and forcibly introducing external air and discharging the purified air to the outside of the air cleaner, and a discharge port through which the purified air is discharged. It consists of (17).

In addition, the dust collecting filter 11 has an ionization unit that chemically separates the dust smell and the gas smell by the pulse output from the pulse high voltage generator 15 while the dust passing through the dust collecting filter 11 has charge. 12) and a collecting part 13 for collecting dust having a charge while passing through the ionizing part 12.

In addition, referring to FIG. 7, the ionizing unit 12 of the dust collecting filter 11 may include a discharge electrode 19 for corona discharge at a high pressure output from the pulse high voltage generator 15, and the discharge electrode 19. The discharge counter electrode 18 has an opposite electrical polarity, and the collecting part 13 applies an electric field to the dust passing through the ionizing part 12 at a high pressure output from the DC high voltage generating part 14. Accelerated electrode plate 20 that pushes the dust to the hermetic electrode plate 21, and has an electrode facing the acceleration electrode plate 20 and collects the dust pushed out by the acceleration electrode plate 20 The collecting electrode plate 21 is comprised.

Referring to FIG. 8, the pulse high voltage generator 15 may include a DC power input unit 150A for inputting DC power and a pulse input unit 150B for determining an on / off cycle and time of the transistor Q11. And a switching unit 150 including a transistor Q11, which is an electric element that switches by the signal of the pulse input unit 150B. The pulsed voltage is amplified to the pulsed high voltage by the secondary coil L12 having a constant winding ratio with respect to the primary coil L11 and the primary coil L11 through which the pulsed current flows by the transistor Q11 on operation. It consists of amplification unit 151 which is loaded on the input DC high and low voltage and then output to the dust collecting filter unit 11, the capacitor (C11) and diode (D11), capacitor (C12) and diode (D12), respectively, For protection.

The above-described configuration of the DC high voltage generator 14 is the same as in the prior art, and thus redundant description is avoided.

The operation of the present invention configured as described above will be described with reference to FIGS. 6 to 9.

Dust air, which is forcedly sucked by the rotation of the fan 16, passes through the intake port and is collected through the dust filter 11, so that dust and dust odor and gas odor are removed. The dust filter 11 is a high-pressure discharge. To the dust passing through the dust collecting filter 11 to collect the dust and the dust having a charge while passing through the ionizing unit 12 and the ionizing unit 12 to chemically separate the dust smell and gas smell ( 13) and its operation is as follows.

First, when the low voltage is input to the transistor Q11 of the switching unit 150, the pulse high voltage generation unit 15 is turned on / off while the transistor Q11, which is an electric element, generates a pulse and then the primary coil ( The pulse input by the amplifier 151 consisting of L11 and the secondary coil L12 is amplified to a pulse high voltage.

Therefore, the DC high voltage generated through the DC high voltage generator 14 is loaded on the pulse high voltage amplified by the pulse high voltage generator 15 and output to the ionizing unit 12.

That is, the pulse high voltage generation unit 15 will be described in more detail. The pulse input unit 150B is composed of an output terminal of an electric element that oscillates using the RC time constant of the ordinary resistor R and the capacitor C. And the base terminal of the speech transistor Q11.

In order to change the output frequency of the oscillating electric element by using the RC time constant, the oscillation frequency period may be changed so that the pulse of the frequency to be output is changed by changing the resistance (R) value and the capacitor (C) value. Will output in the form of.

The output of the electrical device output terminal whose output frequency is determined by the R and C time constants becomes high, and the switching transistor Q11 is 'switched on', so that the switching transistor Q11 is 'switched on'. The current flows through the primary coil L11 of the amplifier 151 by the DC low voltage input from the power input unit 150A for a period of time, and the pulse high voltage is induced in the primary coil L11 and the secondary coil L12.

On the other hand, when the output of the pulse input unit 150B goes low, the switching transistor Q11 is 'switched off', so that no current flows in the primary coil L11 of the amplifying unit 151. Since there is no voltage induced in the secondary coil (L12) of the (), the state becomes 'low' state.

As described above, since the output of the pulse input unit 150A repeats high or low, in the secondary coil L12 of the amplifying unit 151, a pulse high voltage in which the high and low states are repeated is induced and the amplifying unit 151 Pulse high voltage induced in the secondary coil (L12) of the can be output to the electrostatic precipitator unit.

Therefore, the high voltage as shown in FIG. 9 output from the pulse high voltage generator 15 is supplied to the discharge electrode 19 of the ionizing portion 12, and the discharge counter electrode plate 18 is opposed to the discharge electrode 19. When the high-voltage corona discharge is performed at the discharge electrode 19, electric charges are transferred to the dust passing through the discharge electrode 19 and the discharge counter electrode plate 18 at part a of FIG. 9, and at a part b of FIG. By the pulse, the dust and gas smells passing through the discharge electrode 19 and the discharge counter electrode plate 18 are chemically decomposed to remove the dust and gas smells.

The dust that is charged while passing through the ionizing unit 12 is separated from the acceleration electrode plate 20 by the electric field difference generated between the acceleration electrode plate 20 and the collecting electrode plate 21 of the collecting unit 13. It is pushed to both sides with the center and attached to the collecting electrode plate 21 having a polarity opposite to the electrical polarity of the dust.

At this time, the acceleration electrode plate 20 is supplied with a voltage equal to or less than the voltage supplied to the discharge electrode 19 of the ionizing unit 12 from the DC high voltage generator 14.

On the other hand, the dust is removed while passing through the dust collecting filter 11, the clear air from which the dust smell and gas smell is removed is discharged out of the air cleaner through the outlet (17).

As described above, the present invention is an air purifier having an electrostatic precipitator which can be used semi-permanently without replacing the filter by simultaneously performing dust removal and deodorization at the dust collecting filter using a high-voltage pulse output from the pulse high voltage generator, The low voltage input (generally, the input voltage is inputted by converting an AC power source into a direct current) is switched on and off by turning on and off an electric element made of a transistor to generate a pulse, and then the amplification unit comprising the primary and secondary coils By amplifying the pulse high voltage by adding the pulse high voltage to the DC high voltage generated through the DC high voltage generating unit as in the prior art, and outputting it to the electrostatic precipitator, thereby miniaturizing the technical configuration for generating the pulse high voltage. It can be used for business or business, switching unit made of electric elements The on / off time can be made very fast, and the frequency magnitude can be increased dramatically to improve the gas removal efficiency. The visible removal efficiency by the pulse high voltage is closely related to the generation period of the pulse high voltage, that is, the frequency. The higher the frequency, the higher the gas removal efficiency, but the frequency of the pulse generated by the rotary spark gap switch is determined by the rotational speed of the rotating electrode, and the rotational speed of the motor to rotate the rotating electrode is There is a limit, which places constraints on the frequency above several hundred Hz.

Claims (3)

An air purifier having a direct current high voltage generator for discharging a high voltage output from the high voltage generator to remove foreign substances in a room, wherein the input voltage in a low voltage state is switched by an electric element to generate a pulse. Comprising a switching unit and an amplifier for amplifying the pulse generated from the switching unit to a pulse of high voltage, and further comprising a pulse high voltage generator for generating a pulse in the switching unit first and then amplifying the pulse high voltage in the amplifying unit Air purifier having an electrostatic precipitator, characterized in that. The transistor Q11 of claim 1, wherein the pulse high voltage generator is configured to switch by a signal of the pulse input unit and the pulse input unit to determine the on / off cycle and time of the DC power input unit for inputting the DC power and the transistor Q11. Switching unit consisting of; The pulsed high voltage is converted into a pulsed high voltage by a primary coil L11 through which a pulsed current flows due to the on operation of the transistor Q11 and a secondary coil L12 having a constant turns ratio with respect to the primary coil L11. Air purifier having an electrostatic precipitator, characterized in that consisting of an amplifier for amplifying and outputting. The electrostatic precipitator according to claim 1, wherein the pulse high voltage generated by the pulse high voltage generator and the DC high voltage output from the DC high voltage generator are added to output the DC + pulse high voltage to the electrostatic precipitator. air cleaner.