An adaptive adjustment oil fume purification system and method

Abstract

The application discloses a self-adaptive adjusting oil fume purification system and method, which comprises an automatic control circuit, a detection circuit, a manual adjusting circuit and a main control circuit; the main control circuit is connected with the manual adjusting circuit, the manual adjusting circuit is further connected with the detection circuit, and the detection circuit is connected with the automatic control circuit; the self-adaptive adjusting oil fume purification system can adaptively determine to execute coarse adjustment or fine adjustment according to the change of the oil fume concentration in the environment and the change of the current of an inductor CH2 flowing through the automatic control circuit, and finally the main control chip U1 of the main control circuit drives the MOS tube to automatically increase power and generate a high-voltage electric field to adsorb smoke particles, so that the purification effect is guaranteed and the energy-saving and emission-reducing effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of electronic circuit technology, and specifically to an adaptive adjustment oil fume purification system and method. Background Technology

[0002] The kitchen is where delicious food is prepared, but cooking produces a lot of oil fumes. To solve this problem, integrated cooktops were developed. However, existing integrated cooktops cannot purify the absorbed fumes; they can only release them outdoors, polluting the air. Air purifiers can purify the air in the environment. However, air purifiers are inefficient and can only purify indoor air pollution, not kitchen fumes. Furthermore, air purifiers cannot automatically adjust their power according to the amount of oil fumes in the environment, making them unsuitable for purifying large quantities of oil fumes. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an adaptive adjustment oil fume purification system and method that can adaptively adjust the purification power.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] An adaptive oil fume purification system includes: an automatic control circuit, a detection circuit, a manual adjustment circuit, and a main control circuit; the main control circuit and the manual adjustment circuit are connected, the manual adjustment circuit is also connected to the detection circuit, and the detection circuit is connected to the automatic control circuit; the main control circuit includes a main control chip U1, the L0 terminal of the main control chip U1 is connected to the gate of a transistor MOS12 through a resistor R11, the gate of the transistor MOS12 is also connected to ground through a diode D13 and a resistor R14, the anode of the diode D13 is connected to ground, the VS terminal of the main control chip U1 is connected to the gate of the transistor MOS11 through a diode D12 and a resistor R13, the cathode of the diode D12 is connected to the gate of the transistor MOS11, the HC terminal of the main control chip U1 is connected to the gate of the transistor MOS11 through a resistor R12, the source of the transistor MOS11 is connected to the drain of the transistor MOS12, the drain of the transistor MOS11 is connected to a first power supply terminal, and the VE terminal of the main control chip U1 is connected to the VS terminal of the main control chip U1 through a capacitor C11. The VE terminal of the main control chip U1 is connected to the second power supply terminal via diode D11. The first power supply terminal is connected to ground sequentially via capacitors C12 and C13, and also sequentially via resistors R15 and R16. The first terminal of the primary coil of transformer B1 is connected to one end of resistor R15 and one end of capacitor C12. The first terminal of the secondary coil of transformer B1 serves as the high-voltage electric field output terminal for adsorbing smoke particles. The third terminal of the primary coil of transformer B1 is connected to the manual adjustment circuit. The GND terminal of the main control chip U1 is connected to ground. The CT terminal of the main control chip U1 is connected to the manual adjustment circuit sequentially via resistor R18 and diode D17. In the circuit, the cathode of diode D17 is connected to the manual adjustment circuit. The CT terminal of the main control chip U1 is also connected to the manual adjustment circuit in sequence through resistor R17 and diode D15. The anode of diode D15 is connected to the manual adjustment circuit. The RT terminal of the main control chip U1 is connected to the cathode of diode D17 through diode D14. The cathode of diode D14 is connected to one end of capacitor C14, one end of capacitor C15, and one end of resistor R19. The other ends of capacitor C14, capacitor C15, and resistor R19 are all connected to the anode of diode D15. The anode of diode D15 is also connected to the anode of diode D17 through diode D16.

[0006] An adaptive adjustment method for oil fume purification based on the above-mentioned adaptive adjustment oil fume purification system includes: powering on the main control circuit, the main control chip U1 controlling the transformer B1 to generate a high-voltage electric field; when the concentration of oil fume in the environment changes, the oil fume passes through the high-voltage zone, the electric field in the high-voltage zone changes, and the current flowing through the inductor CH2 of the automatic control circuit changes; the time base integrated chip U2 of the automatic control circuit detects the current change of the inductor CH2 and decides to perform coarse adjustment or fine adjustment based on the current change; if the current change is less than a first preset threshold, coarse adjustment is performed. The specific steps of coarse adjustment are: the time base integrated chip U2 of the automatic control circuit outputs a first current change signal to the main control chip U1 of the main control circuit; the main control chip U1 adaptively controls the transistors MOS11 and MOS12 according to the first current change signal, and then controls the transformer B1 to output a high-voltage field to adaptively purify the oil fume in the environment;

[0007] If the current change is greater than or equal to the first preset threshold and less than the second preset threshold, fine adjustment is performed. The specific steps of fine adjustment are as follows: the time base integrated chip U2 of the automatic control circuit outputs the second current change signal to the main control chip U1 of the main control circuit. The main control chip U1 controls the manual adjustment circuit through the U4_3 port of the primary coil of the transformer B1 according to the second current change signal. The quad operational amplifier U4 input to the manual adjustment circuit outputs the third current change signal to the detection circuit. The dual operational amplifier U3 of the detection circuit outputs the fourth current change signal to the automatic control circuit. The time base integrated chip U2 of the automatic control circuit outputs the fifth current change signal to the main control chip U1 of the main control circuit. The main control chip U1 adaptively controls the transistors MOS11 and MOS12 according to the fifth current change signal, and then controls the transformer B1 to output a high voltage field to adaptively purify the oil fumes in the environment.

[0008] The present invention has the following advantages over the prior art:

[0009] This invention can adapt to changes in the concentration of oil fumes in the environment and the changes in the current flowing through the inductor CH2 of the automatic control circuit, and decide whether to perform coarse or fine adjustment. Finally, the main control chip U1 of the main control circuit drives the MOS transistor to automatically increase the power and generate a high-voltage electric field to adsorb smoke particles, thereby ensuring the purification effect and achieving the effect of energy saving and emission reduction. Attached Figure Description

[0010] Figure 1 This is a circuit diagram of the main control circuit of the present invention.

[0011] Figure 2 This is a circuit diagram of the automatic control circuit of the present invention.

[0012] Figure 3 This is a circuit diagram of the detection circuit of the present invention.

[0013] Figure 4 This is a circuit diagram of the manual adjustment circuit of the present invention.

[0014] Figure 5 This is a circuit diagram of the power supply circuit of the present invention. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] See Figure 1-5 An adaptive oil fume purification system includes: an automatic control circuit, a detection circuit, a manual adjustment circuit, and a main control circuit; the main control circuit is connected to the manual adjustment circuit, the manual adjustment circuit is also connected to the detection circuit, and the detection circuit is connected to the automatic control circuit; the main control circuit includes a main control chip U1, the L0 terminal of the main control chip U1 is connected to the gate of a transistor MOS12 through a resistor R11, the gate of the transistor MOS12 is also connected to ground through a diode D13 and a resistor R14, the anode of the diode D13 is connected to ground, the VS terminal of the main control chip U1 is connected to the gate of the transistor MOS11 through a diode D12 and a resistor R13, the cathode of the diode D12 is connected to the gate of the transistor MOS11, the HC terminal of the main control chip U1 is connected to the gate of the transistor MOS11 through a resistor R12, the source of the transistor MOS11 is connected to the drain of the transistor MOS12, the drain of the transistor MOS11 is connected to a first power supply terminal, and the VE terminal of the main control chip U1 is connected to the VS terminal of the main control chip U1 through a capacitor C11. The VE terminal of the main control chip U1 is connected to the second power supply terminal via diode D11. The first power supply terminal is connected to ground sequentially via capacitors C12 and C13, and also sequentially via resistors R15 and R16. The first terminal of the primary coil of transformer B1 is connected to one end of resistor R15 and one end of capacitor C12. The first terminal of the secondary coil of transformer B1 serves as the high-voltage electric field output terminal for adsorbing smoke particles. The third terminal of the primary coil of transformer B1 is connected to the manual adjustment circuit. The GND terminal of the main control chip U1 is connected to ground. The CT terminal of the main control chip U1 is connected to the manual adjustment circuit sequentially via resistor R18 and diode D17. In the circuit, the cathode of diode D17 is connected to the manual adjustment circuit. The CT terminal of the main control chip U1 is also connected to the manual adjustment circuit in sequence through resistor R17 and diode D15. The anode of diode D15 is connected to the manual adjustment circuit. The RT terminal of the main control chip U1 is connected to the cathode of diode D17 through diode D14. The cathode of diode D14 is connected to one end of capacitor C14, one end of capacitor C15, and one end of resistor R19. The other ends of capacitor C14, capacitor C15, and resistor R19 are all connected to the anode of diode D15. The anode of diode D15 is also connected to the anode of diode D17 through diode D16.

[0017] In this embodiment, the automatic control circuit includes: a timer integrated chip U2, the TRIG terminal of the timer integrated chip U2 is connected to the positive receiving terminal of the optocoupler MOC21, the TRIG terminal of the timer integrated chip U2 is also connected to one end of the capacitor C26, the other end of the capacitor C26 is connected to ground through the capacitor C23, the resistor R23 and the inductor CH2 respectively, the TRIG terminal of the timer integrated chip U2 is also connected to ground through the capacitor C24 and the diode D22 respectively, the anode of the diode D22 is connected to ground, and the positive emitter of the optocoupler MOC21 is connected to the detection circuit.

[0018] In this embodiment, the detection circuit includes: the IN1+ terminal of the dual operational amplifier U3 is connected to the third power supply terminal through resistor R34; the IN1- terminal of the dual operational amplifier U3 is connected to the manual adjustment circuit through resistor R33; the OUT1 terminal of the dual operational amplifier U3 is connected to the positive emitter of the optocoupler MOC21 of the automatic control circuit through diode D31 and resistor R32 in sequence; the anode of diode D31 is connected to the OUT1 terminal of the dual operational amplifier U3; the OUT2 terminal of the dual operational amplifier U3 is connected to the positive emitter of the optocoupler MOC21 of the automatic control circuit through diode D32 and resistor R32 in sequence; the anode of diode D32 is connected to the OUT2 terminal of the dual operational amplifier U3; the IN2+ terminal of the dual operational amplifier U3 is connected to ground through capacitor C33; the IN2+ terminal of the dual operational amplifier U3 is also connected to the manual adjustment circuit through diode D34 and resistor R342 in sequence; the cathode of diode D34 is connected to the IN2+ terminal of the dual operational amplifier U3; and the IN2- terminal of the dual operational amplifier U3 is connected to the third power supply terminal through resistor R37.

[0019] In this embodiment, the manual adjustment circuit includes: a quad operational amplifier U4; the OUT1 and IN1- terminals of the quad operational amplifier U4 are connected to one end of resistor R33 of the detection circuit via resistors R413 and R414 respectively; the IN1+ terminal of the quad operational amplifier U4 is connected to ground via resistors R410 and R411 respectively; the other end of resistor R410 is connected to the third end of the primary coil of transformer B1; the IN2+ terminal of the quad operational amplifier U4 is connected to the OUT2 terminal via capacitor C46; the IN2+ terminal of the quad operational amplifier U4 is also connected to one end of resistor R413 via resistor R49; the OUT2 terminal of the quad operational amplifier U4 is connected to the IN3- terminal via resistor R46; the OUT4 terminal of the quad operational amplifier U4 is connected to one end of resistor R33 of the detection circuit; and the IN4- terminal of the quad operational amplifier U4 is connected to the OUT3- terminal via resistor R414. 4. Connect one end of resistor R33 to the detection circuit. Connect the IN3+ terminal of the quad operational amplifier U4 to the sliding terminal of the variable resistor WS1 through resistor R41. Connect the first stationary terminal of variable resistor WS1 to the sliding terminal of variable resistor WS2. Connect the second stationary terminal of variable resistor WS1 to the second stationary terminal of variable resistor WS2 through resistor R43. Connect the second stationary terminal of variable resistor WS2 to ground. Connect the first stationary terminal of variable resistor WS2 to the positive emitter of optocoupler MOC41 through resistors R44 and R45. Connect the positive receiver of optocoupler MOC41 to the anode of diode D15 in the automatic control circuit. Connect the negative emitter of optocoupler MOC41 to ground through diode D41 and capacitor C41. Connect the negative receiver of optocoupler MOC41 to the cathode of diode D17 in the automatic control circuit.

[0020] In this embodiment, the main control chip U1 is model GR8353A, and the time base integrated chip U2 is model NE555. Pin 3 of U2 (NE55) outputs to control pin 1 of U1 (GR8353).

[0021] In this embodiment, the dual operational amplifier U3 is an LM358, and the quad operational amplifier U4 is an LM324.

[0022] The adaptive adjustment method of the above-mentioned adaptive oil fume purification system specifically includes: when the main control circuit is powered on, the main control chip U1 controls the transformer B1 to generate a high-voltage electric field. When the concentration of oil fume in the environment changes, the oil fume passes through the high-voltage zone. The electric field of the high-voltage zone changes, and the current flowing through the inductor CH2 of the automatic control circuit changes. The time base integrated chip U2 of the automatic control circuit detects the current change of the inductor CH2 and decides to perform coarse adjustment or fine adjustment based on the current change.

[0023] If the current change is less than the first preset threshold, coarse adjustment is performed. The specific steps of coarse adjustment are as follows: the time base integrated chip U2 of the automatic control circuit outputs the first current change signal to the main control chip U1 of the main control circuit. The main control chip U1 adaptively controls the transistors MOS11 and MOS12 according to the first current change signal, and then controls the transformer B1 to output a high voltage field so as to adaptively purify the oil fumes in the environment.

[0024] If the current change is greater than or equal to the first preset threshold and less than the second preset threshold, fine adjustment is performed. The specific steps of fine adjustment are as follows: the time base integrated chip U2 of the automatic control circuit outputs the second current change signal to the main control chip U1 of the main control circuit. The main control chip U1 controls the manual adjustment circuit through the U4_3 port of the primary coil of the transformer B1 according to the second current change signal. The quad operational amplifier U4 input to the manual adjustment circuit outputs the third current change signal to the detection circuit. The dual operational amplifier U3 of the detection circuit outputs the fourth current change signal to the automatic control circuit. The time base integrated chip U2 of the automatic control circuit outputs the fifth current change signal to the main control chip U1 of the main control circuit. The main control chip U1 adaptively controls the transistors MOS11 and MOS12 according to the fifth current change signal, and then controls the transformer B1 to output a high voltage field to adaptively purify the oil fumes in the environment.

[0025] The NE555 timing chip detects current fluctuations in the output feedback winding (inductor CH2) and controls the voltage of the main control chip GB8353A to stabilize the current. The four operational amplifiers U4 and LM324 in the manual adjustment circuit detect voltage fluctuations in the output feedback winding and control the NE555 timing chip via dual operational amplifiers U3 and LM358 to adjust the GB8353A voltage and stabilize the voltage fluctuations.

[0026] In this embodiment, if the current change is greater than or equal to the second preset threshold, manual adjustment is performed. The specific steps of manual adjustment are as follows: the user manually adjusts the sliding rheostats WS1 and WS2 of the manual adjustment circuit. The resistance change signal is sent to the main control chip U1 of the main control circuit through the positive receiving terminal MOC_3 and the negative receiving terminal MOC_4 of the optocoupler MOC41. The main control chip U1 adaptively controls the transistors MOS11 and MOS12 according to the resistance change signal, thereby controlling the transformer B1 to output a high-voltage field to adaptively purify the oil fumes in the environment. Manual adjustment allows the circuit board to better adapt to the electric field, resulting in the best purification effect. Manual adjustment controls the frequency of GB8353A through optocoupler isolation to control the high-voltage output.

[0027] In this embodiment, when the concentration of oil fumes in the environment increases, the current flowing through the inductor CH2 of the automatic control circuit increases, and the main control chip U1 controls the transformer B1 to increase the output voltage, so as to adaptively purify the oil fumes in the environment and ensure the purification effect.

[0028] The above-described specific embodiments are preferred embodiments of the present invention and are not intended to limit the present invention. Any other changes or equivalent substitutions made without departing from the technical solution of the present invention are included within the protection scope of the present invention.

Claims

1. An adaptive adjustment oil fume purification system, characterized in that, include: Automatic control circuit, detection circuit, manual adjustment circuit and main control circuit; the main control circuit is connected to the manual adjustment circuit, the manual adjustment circuit is also connected to the detection circuit, and the detection circuit is connected to the automatic control circuit. The main control circuit includes a main control chip U1. The L0 terminal of the main control chip U1 is connected to the gate of a transistor MOS12 via a resistor R11. The gate of the transistor MOS12 is also connected to ground via a diode D13 and a resistor R14. The anode of diode D13 is connected to ground. The VS terminal of the main control chip U1 is connected to the gate of the transistor MOS11 via a diode D12 and a resistor R13. The cathode of diode D12 is connected to the gate of the transistor MOS11. The HC terminal of the main control chip U1 is connected to the gate of the transistor MOS11 via a resistor R12. The source of the transistor MOS11 is connected to the drain of the transistor MOS12. The drain of the transistor MOS11 is connected to the first power supply terminal. The VE terminal of the main control chip U1 is connected to the VS terminal of the main control chip U1 via a capacitor C11. The VE terminal of the main control chip U1 is connected to the second power supply terminal via diode D11. The first power supply terminal is connected to ground sequentially via capacitors C12 and C13, and also sequentially via resistors R15 and R16. The first terminal of the primary coil of transformer B1 is connected to one end of resistor R15 and one end of capacitor C12. The first terminal of the secondary coil of transformer B1 serves as the high-voltage electric field output terminal for adsorbing smoke particles. The third terminal of the primary coil of transformer B1 is connected to the manual adjustment circuit. The GND terminal of the main control chip U1 is connected to ground. The CT terminal of the main control chip U1 is connected to the manual adjustment circuit sequentially via resistor R18 and diode D17. In the circuit, the cathode of diode D17 is connected to the manual adjustment circuit. The CT terminal of the main control chip U1 is also connected to the manual adjustment circuit in sequence through resistor R17 and diode D15. The anode of diode D15 is connected to the manual adjustment circuit. The RT terminal of the main control chip U1 is connected to the cathode of diode D17 through diode D14. The cathode of diode D14 is connected to one end of capacitor C14, one end of capacitor C15, and one end of resistor R19. The other ends of capacitor C14, capacitor C15, and resistor R19 are all connected to the anode of diode D15. The anode of diode D15 is also connected to the anode of diode D17 through diode D16. The automatic control circuit includes: a timer integrated chip U2, the TRIG terminal of the timer integrated chip U2 is connected to the positive receiving terminal of the optocoupler MOC21, the TRIG terminal of the timer integrated chip U2 is also connected to one end of the capacitor C26, the other end of the capacitor C26 is connected to ground through the capacitor C23, the resistor R23 and the inductor CH2 respectively, the TRIG terminal of the timer integrated chip U2 is also connected to ground through the capacitor C24 and the diode D22 respectively, the anode of the diode D22 is connected to ground, and the positive emitter of the optocoupler MOC21 is connected to the detection circuit; The detection circuit includes: the IN1+ terminal of the dual operational amplifier U3 is connected to the third power supply terminal through resistor R34; the IN1- terminal of the dual operational amplifier U3 is connected to the manual adjustment circuit through resistor R33; the OUT1 terminal of the dual operational amplifier U3 is connected to the positive emitter of the optocoupler MOC21 of the automatic control circuit through diode D31 and resistor R32 in sequence; the anode of diode D31 is connected to the OUT1 terminal of the dual operational amplifier U3; the OUT2 terminal of the dual operational amplifier U3 is connected to the positive emitter of the optocoupler MOC21 of the automatic control circuit through diode D32 and resistor R32 in sequence; the anode of diode D32 is connected to the OUT2 terminal of the dual operational amplifier U3; the IN2+ terminal of the dual operational amplifier U3 is connected to ground through capacitor C33; the IN2+ terminal of the dual operational amplifier U3 is also connected to the manual adjustment circuit through diode D34 and resistor R342 in sequence; the cathode of diode D34 is connected to the IN2+ terminal of the dual operational amplifier U3; and the IN2- terminal of the dual operational amplifier U3 is connected to the third power supply terminal through resistor R37. The manual adjustment circuit includes: a quad operational amplifier U4; the OUT1 and IN1- terminals of the quad operational amplifier U4 are connected sequentially to one end of resistor R33 in the detection circuit via resistors R413 and R414; the IN1+ terminal of the quad operational amplifier U4 is connected to ground sequentially via resistors R410 and R411; the other end of resistor R410 is connected to the third terminal of the primary coil of transformer B1; the IN2+ terminal of the quad operational amplifier U4 is connected to the OUT2 terminal via capacitor C46; the IN2+ terminal of the quad operational amplifier U4 is also connected to one end of resistor R413 via resistor R49; the OUT2 terminal of the quad operational amplifier U4 is connected to the IN3- terminal via resistor R46; the OUT4 terminal of the quad operational amplifier U4 is connected to one end of resistor R33 in the detection circuit; and the IN4- terminal of the quad operational amplifier U4 is connected to... One end of resistor R33 in the detection circuit is connected to the IN3+ terminal of the quad operational amplifier U4 via resistor R41 to the sliding terminal of the variable resistor WS1. The first stationary terminal of the variable resistor WS1 is connected to the sliding terminal of the variable resistor WS2. The second stationary terminal of the variable resistor WS1 is connected to the second stationary terminal of the variable resistor WS2 via resistor R43. The second stationary terminal of the variable resistor WS2 is also connected to ground. The first stationary terminal of the variable resistor WS2 is connected to the positive emitter of the optocoupler MOC41 via resistors R44 and R45. The positive receiver of the optocoupler MOC41 is connected to the anode of diode D15 in the automatic control circuit. The negative emitter of the optocoupler MOC41 is connected to ground via diode D41 and capacitor C41. The negative receiver of the optocoupler MOC41 is connected to the cathode of diode D17 in the automatic control circuit. The main control chip U1 is configured to control the transformer B1 to generate a high-voltage electric field. When the concentration of oil fume in the environment changes, the oil fume passes through the high-voltage zone. The electric field of the high-voltage zone changes, and the current flowing through the inductor CH2 of the automatic control circuit changes. The time base integrated chip U2 of the automatic control circuit detects the current change of the inductor CH2 and decides to perform coarse or fine adjustment based on the current change. in, If the current change is less than the first preset threshold, coarse adjustment is performed. The specific steps of coarse adjustment are as follows: the time base integrated chip U2 of the automatic control circuit outputs the first current change signal to the main control chip U1 of the main control circuit. The main control chip U1 adaptively controls the transistors MOS11 and MOS12 according to the first current change signal, and then controls the transformer B1 to output a high voltage field so as to adaptively purify the oil fumes in the environment. If the current change is greater than or equal to the first preset threshold and less than the second preset threshold, fine adjustment is performed. The specific steps of fine adjustment are as follows: the time base integrated chip U2 of the automatic control circuit outputs the second current change signal to the main control chip U1 of the main control circuit. The main control chip U1 controls the manual adjustment circuit through the U4_3 port of the primary coil of the transformer B1 according to the second current change signal. The quad operational amplifier U4 input to the manual adjustment circuit outputs the third current change signal to the detection circuit. The dual operational amplifier U3 of the detection circuit outputs the fourth current change signal to the automatic control circuit. The time base integrated chip U2 of the automatic control circuit outputs the fifth current change signal to the main control chip U1 of the main control circuit. The main control chip U1 adaptively controls the transistors MOS11 and MOS12 according to the fifth current change signal, and then controls the transformer B1 to output a high voltage field to adaptively purify the oil fumes in the environment.

2. The adaptive adjustment oil fume purification system according to claim 1, characterized in that, The main control chip U1 is model GR8353A, and the timer integrated chip U2 is model NE555.

3. The adaptive adjustment oil fume purification system according to claim 1, characterized in that, The dual operational amplifier U3 is model number LM358.

4. The adaptive adjustment oil fume purification system according to claim 1, characterized in that, The quad operational amplifier U4 is model number LM324.

5. An adaptive adjustment method for oil fume purification based on the adaptive adjustment oil fume purification system according to any one of claims 1-4, characterized in that, include: When the main control circuit is powered on, the main control chip U1 controls the transformer B1 to generate a high-voltage electric field. When the concentration of oil fumes in the environment changes, the oil fumes pass through the high-voltage zone. The electric field of the high-voltage zone changes, and the current flowing through the inductor CH2 of the automatic control circuit changes. The time base integrated chip U2 of the automatic control circuit detects the current change of the inductor CH2 and decides to perform coarse or fine adjustment based on the current change. If the current change is less than the first preset threshold, coarse adjustment is performed. The specific steps of coarse adjustment are as follows: the time base integrated chip U2 of the automatic control circuit outputs the first current change signal to the main control chip U1 of the main control circuit. The main control chip U1 adaptively controls the transistors MOS11 and MOS12 according to the first current change signal, and then controls the transformer B1 to output a high voltage field so as to adaptively purify the oil fumes in the environment. If the current change is greater than or equal to the first preset threshold and less than the second preset threshold, then fine adjustment is performed. The specific steps of fine adjustment are as follows: The timing integrated chip U2 of the automatic control circuit outputs a second current change signal to the main control chip U1 of the main control circuit. The main control chip U1 controls the manual adjustment circuit through the U4_3 port of the primary coil of transformer B1 based on the second current change signal. The quad operational amplifier U4 input to the manual adjustment circuit outputs a third current change signal to the detection circuit. The dual operational amplifier U3 of the detection circuit outputs a fourth current change signal to the automatic control circuit. The timing integrated chip U2 of the automatic control circuit outputs a fifth current change signal to the main control chip U1 of the main control circuit. The main control chip U1 adaptively controls transistors MOS11 and MOS12 based on the fifth current change signal, thereby controlling transformer B1 to output a high-voltage field to adaptively purify the oil fumes in the environment.

6. The method for purifying oil fumes according to claim 5, characterized in that, If the current change is greater than or equal to the second preset threshold, manual adjustment is performed. The specific steps of manual adjustment are as follows: the user manually adjusts the sliding rheostats WS1 and WS2 of the manual adjustment circuit, and sends the resistance change signal to the main control chip U1 of the main control circuit through the positive receiving terminal MOC_3 and the negative receiving terminal MOC_4 of the optocoupler MOC41. The main control chip U1 adaptively controls the transistors MOS11 and MOS12 according to the resistance change signal, and then controls the transformer B1 to output a high voltage field to adaptively purify the oil fumes in the environment.

7. The method for purifying oil fumes according to any one of claims 5 or 6, characterized in that, When the concentration of oil fumes in the environment increases, the current flowing through the inductor CH2 in the automatic control circuit increases. The main control chip U1 controls the transformer B1 to increase the output voltage, so as to adaptively purify the oil fumes in the environment and ensure the purification effect.

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