KR0140793B1 - Automatic control device of airflow of air purifier - Google Patents

Abstract

The present invention relates to an air purifier, and more particularly, to an apparatus for automatically adjusting the air volume of an air purifier to automatically increase the air purifying efficiency to correspond to the indoor pollution degree.

The present invention is a high-pressure generating means for generating a high pressure in accordance with the output signal of the high-pressure driving means to supply a high pressure to the electrostatic precipitating plate, a high pressure detecting means for detecting a change in the high pressure generated by the high pressure generating means, the high pressure detecting means As a microcomputer to determine the high-pressure abnormality and indoor pollution according to the output of the output and output the air volume control signal according to the determination result, and the air flow control means for controlling the air volume by driving the fan motor according to the air volume control signal output from the microcomputer Is done.

Description

Airflow automatic control device of air purifier

1 is a circuit diagram of the air volume automatic control device of the present invention.

2 is a configuration diagram of a dust collecting part applied to FIG. 1.

3 is a perspective view of a dust collecting part applied to FIG.

4 is a current flow diagram of a dust collecting plate applied to FIG.

**** Explanation of symbols for the main parts of the drawing ****

5: microcomputer 7: high voltage drive unit

8: High pressure generating unit 9: High pressure detecting unit

10: air volume control unit

The present invention relates to an air purifier, and more particularly, to an apparatus for automatically adjusting the air volume of an air purifier to automatically increase the air purifying efficiency to correspond to the indoor pollution degree.

Conventional air purifiers include a power supply unit for supplying power, a switch unit for selecting a function, a display unit for displaying a product state, a microcomputer for controlling the overall operation of the purifier, an oscillator for generating an oscillation frequency, a buzzer for generating a buzzer sound for each switch input. It consists of a load driving part for driving the fan motor and a high pressure part for supplying high pressure to the electrostatic precipitator plate.

Referring to the operation of the conventional air cleaner configured as described above is as follows.

When the user presses the operation switch, the microcomputer detects this and drives the high voltage part to generate DC 6.0KV so that the high pressure is supplied to the electrostatic precipitator.

In addition, the air volume is adjusted according to the air volume selected by the user.

On the other hand, the electrostatic precipitator collects foreign substances such as dust at the supplied high pressure, and when the dust is sucked into the electrostatic precipitator while a large amount of dust is sucked in, the air flow rate or the high pressure part is set as it is. Is driven.

However, such a conventional air purifier changes the current flowing in the high pressure part according to the amount of dust sucked into the electrostatic precipitator plate. At this time, there is a problem in that the precipitating efficiency of the electrostatic precipitator plate is lowered because the set air volume is generated without changing the air volume.

Therefore, the present invention is to solve the problems of the prior art as described above, the object of the present invention provides an automatic air volume control device of the air purifier to automatically adjust the air volume corresponding to the indoor pollution degree to increase the efficiency of air purification. Is in.

Means for achieving the object of the present invention is a high pressure generating means for supplying a high pressure to the electrostatic precipitator plate, a high pressure detecting means for detecting a change in the high voltage generated in the high pressure generating means, the high pressure in accordance with the output of the high pressure detecting means The microcomputer determines the above and outputs the air volume control signal according to the determination result, and the air volume control means for controlling the air volume by driving the fan motor according to the air volume control signal output from the microcomputer.

Hereinafter, described in detail with reference to the accompanying drawings of the present invention.

1 is a circuit diagram of the airflow automatic control device of the present invention, the bridge diode (BD1) and the bridge diode (BD1) for receiving full-wave rectification by applying the input AC power supply AC 220V through the transformer (T1) as shown A smoothing condenser C1 for smoothing the voltage obtained in the first condenser and a first condenser 1a and a smoothing condenser C1 for outputting the output voltage of the smoothing capacitor C1 by a constant voltage (DC5V) are outputted. A power supply unit 1 consisting of a second constant voltage generator 1b for outputting the voltage through a constant voltage (12 V DC) at a constant level, a switch unit 2 for selecting a function, an oscillation unit 3 for generating an oscillation clock, and In accordance with the oscillation clock of the oscillator 3, the microcomputer displays the corresponding function on the display unit 4 according to the switch input of the switch unit 2 and generates various control signals to control the overall operation of the air purifier. (5) and said A buzzer 6 for generating a buzzer sound according to the control signal of the com 5, a high voltage driver 7 for switching on and off according to the control signal of the microcomputer 5 to drive the high voltage part, and the high voltage driver ( 7) detects a high voltage abnormality by generating a high pressure in accordance with the output of 7) and supplying a high pressure to the electrostatic precipitating plate, and comparing the high pressure generated from the high pressure generating unit 8 with a reference voltage V1. As a result, the high-pressure sensor 9 for applying the signal to the microcomputer 5, and the air flow control unit for controlling the air flow by driving the fan motor 11 in accordance with the air flow control signal output from the microcomputer (5) It consisted of (10).

Referring to Figures 2 to 4 attached to the operation, the effect of the airflow automatic control device of the present invention configured as described above is as follows.

First, as shown in FIG. 1, the power supply unit 1 drops the AC power input AC 220V to the transformer T1, rectifies and propagates the bridge diode BD1, and smoothes the smoothed condenser C1. To a DC voltage of a predetermined level.

The DC voltage is converted into a constant voltage of a constant level (DC 5V) and supplied to the driving power supply of the microcomputer 5, and the second constant voltage generator 1b is a constant voltage of a constant level (DC 12V). The power supply is supplied to each stage of the circuit.

In this state, when the operation switch SW1 is pressed through the switch 2 from the user, the microcomputer 5 detects this and displays it on the display unit 4, so that the fan motor 11 is rotated in a slight wind. The high signal is output through the terminal O2.

When the high signal is output from the output terminal O2, the low voltage is generated by the third inverter 10C in the air volume control unit 10, so that the DC voltage DC12V supplied from the second constant voltage regulator 1b is made zero. It flows to the three relay RL3, and thus the input AC power supply AC220V is supplied to the fan motor 11 through the third relay RL3 to drive the blower fan in the mild wind.

In addition, when the operation switch SW1 is pressed, the microcomputer 5 outputs a high signal through the output terminal O1. Accordingly, the microcomputer 5 turns on the first transistor Q1 in the high voltage driving unit 7 to turn on the second signal. The base terminal voltage of the transistor Q2 becomes low level and the second transistor Q2 is also turned on.

When the second transistor Q2 is turned on, the DC voltage DC12V supplied from the second constant voltage generator 2b flows to the primary side of the flyback transformer FBT in the high voltage generator 8.

When current flows to the primary side of the flyback transformer FBT, a voltage boosted to AC3KV is generated on the secondary side, and the boosted voltage AC3KV is rectified by the condenser C10 and the high voltage diode D10 and D11. Then, DC 6.0KV is generated, and this DC 6.0KV is supplied to the dust collecting plate shown in FIG. 2 to collect dust in the air.

At this time, when dust is collected in the room normally, the current i flowing from DC 6KV + to-flows in the same relationship as I2 in FIG.

The lower the pollution level of the room, i.e., the cleaner the room, the smaller the current i flowing from DC6KV + to-.

Therefore, since the indoor dust decreases between + and-in FIG. 2, the resistance between + and-increases, so that the current i flows to step I1 of FIG.

Then, when the indoor pollution is increased, dust or other foreign matter is increased between DC 6.0KV +,-in FIG.

Then, the resistance between the + and the dust collector is reduced so that the current i flows as in step I3 of FIG.

In this way, when the resistance between the + and the collector plates is reduced, the current flowing to the secondary side of the flyback transformer (FBT) becomes larger than the normal value, and the final DC 6.0KV is relatively low.

In addition, the third side current of the flyback transformer (FBT) is also proportionally lowered.

At this time, the voltage flowing to the tertiary side becomes a constant voltage to the zener diode ZD1 through the diode D1 and the condenser C4 of the high voltage sensing unit 9 and is input to the non-inverting terminal (+) of the comparator CP1. In addition, a constant reference voltage V1 divided by the resistors R3 and R4 is input to the inverting terminal (-) of the comparator CP1.

Accordingly, the comparator CP1 compares the input voltages of the two terminals (+,-). In this case, when the foreign matter is increased in the dust collecting plate, the resistance between the dust collecting plates is lowered, so that a large current flows. Since the voltage on the third side of the FBT is lowered, the voltage input to the non-inverting terminal (+) of the comparator CP1 is also lowered lower than the reference voltage V1 input to the inverting terminal (−).

Accordingly, the output of the comparator CP1 becomes a low level and is input to the input terminal I1 of the microcomputer 5, and the microcomputer 5 has a serious air pollution when the level input to the input terminal I1 becomes low. It is judged that it is in the low, and outputs the air flow control signal to the high level to the output stage (O4) to improve the dust collection performance.

Accordingly, the air volume control unit 10 adjusts the air volume to the strong wind by driving the fan motor 11 at high speed by driving the first relay RL1 according to the high level air volume control signal.

When the air volume is controlled by the strong wind, indoor polluted air is collected in a large amount on the dust collecting plate, thereby reducing indoor pollution.

If the indoor pollution degree is lowered, the dust between the dust collector plates + and-of FIG. 2 becomes small, and the current flowing between the + and-becomes small.

As a result, the secondary induced voltage of the flyback transformer FBT of the high voltage generator 8 is lowered, so that the output voltage DC 6.0 KV is normally restored, and the tertiary output voltage is also relatively increased.

Therefore, the voltage through the diode D1, the condenser C4, and the zener diode ZD1 of the high voltage detecting unit 9 is also increased, thereby increasing the voltage applied to the non-inverting terminal + of the comparator CP1.

At this time, the voltage input to the non-inverting terminal (+) is higher than the constant reference voltage (V1) input to the inverting terminal (-), so that the comparator (CP1) outputs a high level to the output of the input of the microcomputer (5). Input to terminal I1.

Accordingly, when the level input to the input terminal I1 becomes high, the microcomputer 5 determines that the indoor pollution level is low. Therefore, the level of the output terminal O4 is set low and the level of the output terminal O2 is set high. do.

Accordingly, in the air volume control unit 10, the first relay RL1 is turned off by the low signal of the output terminal O4 of the microcomputer 5, and the third relay RL3 is turned off by the high signal of the output terminal O2. ) Is turned on to drive the fan motor 11 in a low wind.

As described in detail above, the present invention rotates the indoor fan to a strong wind when the indoor pollution is high, and rotates the indoor fan to the mild wind when the indoor pollution is low to automatically adjust the air volume according to the indoor pollution degree to increase the purification efficiency and the dust collection efficiency. There is an effect made.

Claims (5)

High pressure generating means for generating a high pressure in accordance with the output signal of the high pressure drive means for supplying a high pressure to the electrostatic precipitator plate; High pressure detecting means for detecting a change in the high pressure generated by the high pressure generating means; A microcomputer for judging high pressure abnormality and indoor contamination according to the output of the high pressure detecting means and outputting a wind volume control signal according to the determination result; And an air volume control unit for controlling the air volume by driving the fan motor according to the air volume control signal output from the microcomputer. The method of claim 1, The high voltage driving means includes a first transistor Q1 that is turned on and off in response to an output signal of the microcomputer, and a high voltage driving voltage DC12V that is controlled from on and off of the first transistor Q1 and supplied from a power supply unit. Air flow rate automatic control device characterized in that consisting of a second transistor (Q2) for supplying and blocking. The method according to claim 1 or 2, The high voltage generating means includes a flyback transformer (FBT) for boosting the voltage DV12V supplied from the second transistor Q2 in the high voltage driving means to a high voltage; It is characterized by consisting of a capacitor (C10) and a high-voltage diode (D10) (D11) for rectifying and backing the voltage output from the secondary side of the flyback transformer (FBT) to generate a high pressure of DC6.0KV and supply it to the dust collecting plate. Air volume automatic control device. The method of claim 1, The high pressure detecting means rectifies and smoothes the voltage output from the flyback transformer tertiary side in the high voltage generating means, and then converts the diode D1, the condenser C4, the zener diode ZD1, and the zener diode. And a comparator (CP1) for comparing the output voltage of (ZD1) with the reference voltage (V1) divided by the resistors (R3) and (R4) and outputting the resultant signal as a high pressure detection value. The method of claim 1, The air flow rate adjusting means may include first to third inverter gates 10a to 10c for respectively inverting phases of the first to third air volume control signals output from the microcomputer; Air volume automatics comprising first to third relays RL1 to RL3 for driving the fan motor 11 to strong, medium, or weak in accordance with the outputs of the first to third inverter gates 10a to 10c. Regulator.