CN220926398U

CN220926398U - Water purifier control circuit

Info

Publication number: CN220926398U
Application number: CN202322520638.5U
Authority: CN
Inventors: 戴明; 孙腾
Original assignee: Ningbo Heyong Electronic Technology Co ltd
Current assignee: Ningbo Heyong Electronic Technology Co ltd
Priority date: 2023-09-15
Filing date: 2023-09-15
Publication date: 2024-05-10
Anticipated expiration: 2033-09-15

Abstract

The utility model provides a control circuit of a water purifier, which comprises: a power module; the driving module comprises an ozone module, a water pump module, a plurality of fan modules and a motor module; the ozone module is electrically connected with the ozone generator through a relay K1, the output end of the water pump module is electrically connected with the water pump, the output ends of the fan modules are respectively electrically connected with a fan, and the motor module is electrically connected with the motor through a relay K2; the switch input module comprises a plurality of touch switches; the main control chip U2, the power end of the main control chip U2 is electrically connected with a third power supply, and the main control chip U2 is electrically connected with an ozone module, a water pump module, a plurality of fan modules and a plurality of touch switches respectively. According to the utility model, the motor module is controlled to drive the motor to increase the mixing contact surface of ozone and water, so that the ozone and the water can be completely mixed, and then the gas convection speed of the ozone is improved by matching with a plurality of fans, so that the water can be rapidly and completely sterilized.

Description

Water purifier control circuit

Technical Field

The utility model relates to the technical field of water purifiers, in particular to a control circuit of a water purifier.

Background

With the improvement of living standard, people pay more attention to the quality problem of drinking water. Therefore, after the water is introduced into a household by tap water or the like, the water is further sterilized by a water purifier or the like, for example, an ozone water purifier is adopted.

In the conventional ozone water purifier, water is taken by a water pump, and water taken and output by the water pump is directly mixed with ozone generated by an ozone generator. Then, the sterilization and disinfection of different water qualities are realized by controlling the working power of the water pump and the working power of the ozone generator. Meanwhile, a fan is arranged to realize heat dissipation of the work of the ozone generator and the water pump. The ozone water purifier has a simple control mode, ozone cannot be completely mixed with water, and sterilization and disinfection are incomplete.

Disclosure of utility model

The technical problems to be solved by the utility model are as follows: the control circuit of the water purifier solves the problem that in the prior art, ozone and water cannot be completely mixed to cause incomplete sterilization and disinfection of the ozone water purifier.

The utility model solves the problems by adopting the following technical scheme: a water purifier control circuit, comprising:

the input end of the power supply module is electrically connected with alternating current mains supply, and the output end of the power supply module outputs a first power supply for supplying power to the water supply pump and the relay, a second power supply for supplying power to the motor and a third power supply for supplying power to the main control chip U2;

The driving module comprises an ozone module for driving an ozone generator, a water pump module for driving a water pump to pump water, a plurality of fan modules for increasing the ozone introducing speed, and a motor module for driving a motor to stir and mix ozone with a water body; the output end of the ozone module is electrically connected with a relay K1, the relay K1 is electrically connected with an ozone generator, the output end of the water pump module is electrically connected with a water pump, the output ends of a plurality of fan modules are respectively electrically connected with a fan, the output end of the motor module is electrically connected with a relay K2, and the relay K2 is electrically connected with a motor;

The switch input module comprises a plurality of touch switches;

The main control chip U2, the power end and the third power of main control chip U2 are connected, main control chip U2 is connected with ozone module's input, water pump module's input, a plurality of fan module's input, a plurality of touch switch's output electricity respectively, main control chip U2 obtains quality of water treatment information according to touch switch to according to quality of water treatment information control ozone module drive power, water pump module drive power, motor module drive power, and fan module drive quantity and drive power.

Compared with the prior art, the utility model has the advantages that: the motor module is controlled to drive the motor to increase the mixing contact surface of ozone and water, so that the ozone and the water can be completely mixed, and then the gas convection speed of the ozone is improved by matching with a plurality of fans, so that the water can be rapidly and completely sterilized.

Preferably, the power supply module comprises a voltage stabilizing chip U1 for stabilizing a first power supply to a third power supply, wherein the first power supply is a direct current 12V power supply, and the third power supply is a direct current 5V power supply; the input end of the voltage stabilizing chip U1 is electrically connected with the first power supply, the input end of the voltage stabilizing chip U1 is electrically connected with the positive electrode end of the electrolytic capacitor C2, the negative electrode end of the electrolytic capacitor C2 is grounded, the input end of the voltage stabilizing chip U1 is grounded through the capacitor C4, the output end of the voltage stabilizing chip U1 is electrically connected with the third power supply, the output end of the voltage stabilizing chip U1 is grounded through the capacitor C3, the output end of the voltage stabilizing chip U1 is electrically connected with the positive electrode of the electrolytic capacitor C5, and the negative electrode of the electrolytic capacitor C5 is grounded.

The technical scheme has the technical effects that: the direct current 12V is stabilized to direct current 5V through the voltage stabilizing chip U1, the acquisition quantity of different power supplies is reduced, voltage conversion is carried out on the power supplies, and the power supplies are convenient to acquire.

Preferably, the ozone module comprises a triode Q2, a first IO port of the main control chip U2 is electrically connected with a base electrode of the triode Q2 through a resistor R3, the base electrode of the triode Q2 is grounded through a resistor R6, an emitter electrode of the triode Q2 is grounded, a collector electrode of the triode Q2 is electrically connected with one end of a coil end of a relay K1 and an anode electrode of a diode D3 respectively, the other end of the coil end of the relay K1 and a cathode electrode of the diode D3 are electrically connected with a first power supply, one end of a contact end of the relay K1 is electrically connected with an alternating current live wire, the other end of the contact end of the relay K1 is electrically connected with one end of an ozone generator through an inductor L1, and the other end of the ozone generator is electrically connected with an alternating current zero wire.

The technical scheme has the technical effects that: the main control chip U2 controls the conduction of the triode Q2 to enable the coil end of the control relay K1 to be electrified, and further controls the two ends of the contact end of the relay K1 to be connected, so that the ozone generator is controlled to be connected to alternating current for working, and whether the ozone generator works or not can be realized only by the triode Q2 and the relay K1, and the operation is convenient; meanwhile, the master control chip U2 can control the on time of the triode Q2 by outputting PWM signals with different duty ratios to the base electrode of the triode Q2, so that the working power of the ozone generator is controlled.

Preferably, the water pump module includes MOS pipe Q4, the second IO mouth of main control chip U2 passes through resistance R8 and is connected with MOS pipe Q4's grid electricity, MOS pipe Q4's grid passes through resistance R12 ground connection, MOS pipe Q4's source electrode ground connection, MOS pipe Q4's drain electrode is connected with diode D5's positive pole and the negative pole electricity of water pump respectively, diode D5's positive pole and the positive pole of water pump are all connected with first power electricity, the positive pole of water pump passes through electric capacity C7 and is connected with the negative pole electricity of water pump.

The technical scheme has the technical effects that: the main control chip U2 only needs to control the conduction of the MOS tube Q4, so that the negative electrode of the water pump is electrified, the water pump can be controlled to work, the operation is convenient, the implementation is easy, and the circuit connection design is simple; meanwhile, the main control chip U2 can control the on time of the MOS tube Q4 by outputting PWM signals with different duty ratios to the grid electrode of the MOS tube Q4, so that the working power of the water pump is controlled.

Preferably, the motor module includes triode Q3, the second power is direct current 24V power, the third IO mouth of main control chip U2 is connected with triode Q3's base electricity through resistance R4, triode Q3's base passes through resistance R7 ground connection, triode Q3's projecting pole ground connection, triode Q3's collecting electrode is connected with diode D4's positive pole and relay K2 coil end one end electricity respectively, relay K2 coil end other end and diode D4's negative pole is connected with first power electricity, relay K2 contact end one end is connected with the second power electricity, relay K2 contact end other end is connected with diode D1's negative pole and motor's positive pole electricity respectively, a electric capacity C1 is parallelly connected at diode D1 both ends, the negative pole of motor and the positive pole of diode D1 are all grounded, the positive pole of motor is connected with the second power electricity through series resistance R1 and electric capacity C6.

The technical scheme has the technical effects that: the main control chip U2 controls the conduction of the triode Q3 to enable the coil end of the control relay K2 to be electrified, and further controls the two ends of the contact end of the relay K2 to be connected, so that the control motor is connected to a second power supply to work, and whether the motor works or not can be realized only by the triode Q3 and the relay K2, and the operation is convenient; meanwhile, the master control chip U2 can control the on time of the triode Q3 by outputting PWM signals with different duty ratios to the base electrode of the triode Q3, and further realize the control of the working power of the motor.

Preferably, the number of the fan modules is three, and each of the three fan modules comprises a first resistor, a second resistor, a first MOS tube, a first diode and a first capacitor;

The fourth IO port, the fifth IO port and the sixth IO port of the main control chip U2 are respectively and electrically connected with the grid electrode of a first MOS tube through a first resistor, the grid electrode of each first MOS tube is grounded through a second resistor, the source electrode of each first MOS tube is grounded, the drain electrode of each first MOS tube is respectively and electrically connected with the anode of a first diode and the cathode of a fan, the anode of each fan and the cathode of the first diode are respectively and electrically connected with a first power supply, and each first diode is connected with a first capacitor in parallel at two ends.

The technical scheme has the technical effects that: the main control chip U2 controls the conduction of the three first MOS tubes to enable the corresponding negative electrodes of the fans to be grounded, so that the corresponding fans are electrically driven, and the working quantity of the three fans is conveniently controlled; meanwhile, when the main control chip U2 outputs PWM signals with different duty ratios to the grid electrode of the first MOS tube, the on time of the first MOS tube can be controlled, and then the working power of the fan is regulated.

Preferably, the touch switch comprises a prompt module for prompting the touch switch to trigger successfully, the prompt module comprises a triode Q1 and a loudspeaker, a seventh IO port of the main control chip U2 is electrically connected with a base electrode of the triode Q1 through a resistor R2, the base electrode of the triode Q1 is grounded through a resistor R5, an emitter electrode of the triode Q1 is grounded, a collector electrode of the triode Q1 is electrically connected with an anode of the diode D2 and a cathode of the loudspeaker respectively, and an anode of the loudspeaker and a cathode of the diode D2 are electrically connected with a third power supply.

The technical scheme has the technical effects that: through the amplification effect of triode Q1, be convenient for master control chip U2 drive speaker work, suggestion touch switch triggers successfully.

Preferably, the display module is used for displaying the selection state of the touch switch and the working time of the ozone generator, and comprises a display driving chip U5, a plurality of LEDs matched with the touch switch one by one, a nixie tube driving chip U4 and a nixie tube;

The display driving chip U5 is in serial communication connection with the main control chip U2, the LEDs are electrically connected with the display driving chip U5, the display driving chip U5 is electrically connected with the nixie tube driving chip U4, and the nixie tube driving chip U4 is electrically connected with the nixie tube; and the display driving chip U5 drives the nixie tube driving chip to drive the corresponding LED according to the short-press trigger of the touch switch.

The technical scheme has the technical effects that: after the touch switch is started, the touch switch is displayed through the corresponding LED, which touch switch is started currently is prompted, and the current working state is indicated; meanwhile, the working time is displayed through the nixie tube, so that the display is convenient to check.

Drawings

FIG. 1 is a system block diagram of a control circuit of a water purifier according to the present utility model;

FIG. 2 is a circuit diagram of a master control driving module of a control circuit of a water purifier according to the present utility model;

Fig. 3 is a circuit diagram of a display module of a control circuit of a water purifier according to the present utility model.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

As shown in fig. 1 to 3, the present embodiment relates to a water purifier control circuit, including:

The input end of the power supply module is connected with alternating current commercial power, and the output end of the power supply module outputs a first power supply for supplying power to the water supply pump and the relay, a second power supply for supplying power to the motor and a third power supply for supplying power to the main control chip U2;

The driving module comprises an ozone module for driving an ozone generator, a water pump module for driving a water pump to pump water, a plurality of fan modules for increasing the ozone introducing speed, and a motor module for driving a motor to stir and mix ozone with a water body; the output end of the ozone module is electrically connected with the relay K1, the relay K1 is electrically connected with the ozone generator, the output end of the water pump module is electrically connected with the water pump, the output ends of the fan modules are respectively electrically connected with a fan, the output end of the motor module is electrically connected with the relay K2, and the relay K2 is electrically connected with the motor;

The switch input module comprises a plurality of touch switches;

The main control chip U2, the power end of the main control chip U2 is electrically connected with a third power supply, the main control chip U2 is respectively electrically connected with the input end of the ozone module, the input end of the water pump module, the input ends of the plurality of fan modules and the output ends of the plurality of touch switches, and the main control chip U2 obtains water quality treatment information according to the touch switches and controls the driving power of the ozone module, the driving power of the water pump module, the driving power of the motor module, the driving quantity and the driving power of the fan modules according to the water quality treatment information.

The motor module is controlled to drive the motor to increase the mixing contact surface of ozone and water, so that the ozone and the water can be completely mixed, and then the gas convection speed of the ozone is improved by matching with a plurality of fans, so that the water can be rapidly and completely sterilized.

The power supply module comprises a voltage stabilizing chip U1 for stabilizing a first power supply into a third power supply, wherein the first power supply is a direct-current 12V power supply, and the third power supply is a direct-current 5V power supply; the input end of the voltage stabilizing chip U1 is electrically connected with the first power supply, the input end of the voltage stabilizing chip U1 is electrically connected with the positive electrode end of the electrolytic capacitor C2, the negative electrode end of the electrolytic capacitor C2 is grounded, the input end of the voltage stabilizing chip U1 is grounded through the capacitor C4, the output end of the voltage stabilizing chip U1 is electrically connected with the third power supply, the output end of the voltage stabilizing chip U1 is grounded through the capacitor C3, the output end of the voltage stabilizing chip U1 is electrically connected with the positive electrode of the electrolytic capacitor C5, and the negative electrode of the electrolytic capacitor C5 is grounded.

The direct current 12V is stabilized to direct current 5V through the voltage stabilizing chip U1, the acquisition quantity of different power supplies is reduced, voltage conversion is carried out on the power supplies, and the power supplies are convenient to acquire.

The ozone module comprises a triode Q2, a first IO port of a main control chip U2 is electrically connected with a base electrode of the triode Q2 through a resistor R3, the base electrode of the triode Q2 is grounded through a resistor R6, an emitting electrode of the triode Q2 is grounded, a collecting electrode of the triode Q2 is electrically connected with one end of a coil end of a relay K1 and an anode of a diode D3 respectively, the other end of the coil end of the relay K1 and a cathode of the diode D3 are electrically connected with a first power supply, one end of a contact end of the relay K1 is electrically connected with an alternating current live wire, the other end of the contact end of the relay K1 is electrically connected with one end of an ozone generator through an inductor L1, and the other end of the ozone generator is electrically connected with an alternating current zero line.

The main control chip U2 controls the conduction of the triode Q2 to enable the coil end of the control relay K1 to be electrified, and further controls the two ends of the contact end of the relay K1 to be connected, so that the ozone generator is controlled to be connected to alternating current for working, and whether the ozone generator works or not can be realized only by the triode Q2 and the relay K1, and the operation is convenient; meanwhile, the master control chip U2 can control the on time of the triode Q2 by outputting PWM signals with different duty ratios to the base electrode of the triode Q2, so that the working power of the ozone generator is controlled.

The water pump module comprises a MOS tube Q4, a second IO port of the main control chip U2 is electrically connected with a grid electrode of the MOS tube Q4 through a resistor R8, the grid electrode of the MOS tube Q4 is grounded through a resistor R12, a source electrode of the MOS tube Q4 is grounded, a drain electrode of the MOS tube Q4 is respectively electrically connected with an anode of the diode D5 and a cathode of the water pump, the anode of the diode D5 and the anode of the water pump are electrically connected with a first power supply, and the anode of the water pump is electrically connected with the cathode of the water pump through a capacitor C7.

The main control chip U2 only needs to control the conduction of the MOS tube Q4, so that the negative electrode of the water pump is electrified, the water pump can be controlled to work, the operation is convenient, the implementation is easy, and the circuit connection design is simple; meanwhile, the main control chip U2 can control the on time of the MOS tube Q4 by outputting PWM signals with different duty ratios to the grid electrode of the MOS tube Q4, so that the working power of the water pump is controlled.

The motor module comprises a triode Q3, a second power supply is a direct-current 24V power supply, a third IO port of a main control chip U2 is electrically connected with a base electrode of the triode Q3 through a resistor R4, the base electrode of the triode Q3 is grounded through a resistor R7, an emitter electrode of the triode Q3 is grounded, a collector electrode of the triode Q3 is electrically connected with an anode of a diode D4 and one end of a coil end of a relay K2 respectively, the other end of the coil end of the relay K2 and a cathode of the diode D4 are electrically connected with a first power supply, one end of a contact end of the relay K2 is electrically connected with the second power supply, the other end of the contact end of the relay K2 is electrically connected with a cathode of the diode D1 and an anode of a motor respectively, two ends of the diode D1 are connected with a capacitor C1 in parallel, the cathode of the motor and the anode of the diode D1 are grounded, and the anode of the motor is electrically connected with the second power supply through a series resistor R1 and the capacitor C6.

The main control chip U2 controls the conduction of the triode Q3 to enable the coil end of the control relay K2 to be electrified, and further controls the two ends of the contact end of the relay K2 to be connected, so that the control motor is connected to a second power supply to work, and whether the motor works or not can be realized only by the triode Q3 and the relay K2, and the operation is convenient; meanwhile, the master control chip U2 can control the on time of the triode Q3 by outputting PWM signals with different duty ratios to the base electrode of the triode Q3, and further realize the control of the working power of the motor.

In this embodiment, the number of the fan modules is three, and each of the three fan modules includes a first resistor, a second resistor, a first MOS transistor, a first diode, and a first capacitor;

the fourth IO port, the fifth IO port and the sixth IO port of the main control chip U2 are respectively and electrically connected with the grid electrode of a first MOS tube through a first resistor, the grid electrode of each first MOS tube is grounded through a second resistor, the source electrode of each first MOS tube is grounded, the drain electrode of each first MOS tube is respectively and electrically connected with the anode of a first diode and the cathode of a fan, the anode of each fan and the cathode of the first diode are respectively and electrically connected with a first power supply, and two ends of each first diode are respectively and parallelly connected with a first capacitor.

The main control chip U2 controls the conduction of the three first MOS tubes to enable the corresponding negative electrodes of the fans to be grounded, so that the corresponding fans are electrically driven, and the working quantity of the three fans is conveniently controlled; meanwhile, when the main control chip U2 outputs PWM signals with different duty ratios to the grid electrode of the first MOS tube, the on time of the first MOS tube can be controlled, and then the working power of the fan is regulated.

In this embodiment, a purifier control circuit still includes a suggestion module that is used for promoting touch switch to trigger successfully, the suggestion module includes triode Q1 and speaker, the seventh IO mouth of main control chip U2 passes through resistance R2 and is connected with triode Q1's base electricity, triode Q1's base passes through resistance R5 ground connection, triode Q1's projecting pole ground connection, triode Q1's collecting electrode is connected with diode D2's positive pole and speaker's negative pole electricity respectively, the positive pole of speaker and diode D2's negative pole all are connected with the third power electricity.

Through the amplification effect of triode Q1, be convenient for master control chip U2 drive speaker work, suggestion touch switch triggers successfully.

Further, in this embodiment, the control circuit of the water purifier further includes a display module for displaying the selection state of the touch switch and the working time of the ozone generator, where the display module includes a display driving chip U5, a plurality of LEDs paired with the touch switch one by one, a nixie tube driving chip U4, and a nixie tube;

The plurality of output touch switches are respectively and electrically connected with the display driving chip U5 through a resistor, the display driving chip U5 is in serial communication connection with the main control chip U2, the plurality of LEDs are electrically connected with the display driving chip U5, the display driving chip U5 is electrically connected with the nixie tube driving chip U4, and the nixie tube driving chip U4 is electrically connected with the nixie tube; and the display driving chip U5 drives the nixie tube driving chip to drive the corresponding LEDs according to the short press triggering of the touch switch.

After the touch switch is started, the touch switch is displayed through the corresponding LED, which touch switch is started currently is prompted, and the current working state is indicated; meanwhile, the working time is displayed through the nixie tube, so that the display is convenient to check.

In this embodiment, the touch switch includes a start switch for sterilizing vegetables, five cereals, meats, active oxygen, tableware and fish, and writes and records different types of sterilization and disinfection programs (including corresponding ozone module working power, water pump module working power, motor module working power, fan module working power and corresponding working time) into the display driving chip U5, where the display driving chip U5 displays the corresponding types through LEDs, displays the corresponding working time through nixie tubes, and transmits the working power information of each module to the main control chip U2, and the main control chip U2 performs corresponding driving. Of course, the program may be written into the main control chip U2, and then connected to the display driving chip U5 through serial communication to perform corresponding driving.

In the actual use process, the working time can be counted through a clock in the display driving chip U5 or the main control chip U2, or the display driving chip U5 is electrically connected with a timer, and time statistics is realized through the timer.

The main control chip needs a plurality of IO ports, and the number of the IO ports needs a plurality of pins of the main control chip U2. Specifically, what number of IO ports mentioned in this embodiment is not what number of pins of the main control chip.

In the actual use process, the whole circuit can be designed on one circuit board, or two circuit boards are arranged: a main control driving circuit board and a display circuit board. The main control driving circuit board (shown in figure 2) comprises a main control chip, a driving module (an ozone module, a water pump module, a motor module and a fan module), a power supply module and a prompt module; the display circuit board (shown in fig. 3) comprises a switch input module, a display driving chip U5 and a display module, and the two circuit boards are connected through a row of plugs P1 and P2. In order to facilitate the normal operation of the display driving chip U5, a power module may be disposed on the display circuit board to supply power to the display driving chip U5.

The beneficial effects of the utility model are as follows: the motor module is controlled to drive the motor to increase the mixing contact surface of ozone and water, so that the ozone and the water can be completely mixed, and then the gas convection speed of the ozone is improved by matching with a plurality of fans, so that the water can be rapidly and completely sterilized.

While the foregoing description illustrates and describes the preferred embodiments of the present utility model, it is to be understood that the utility model is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, and is capable of numerous other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept as described herein, either as a result of the foregoing teachings or as a result of the knowledge or technology in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.

Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the utility model.

Claims

1. A purifier control circuit is characterized in that: comprising the following steps:

The switch input module comprises a plurality of touch switches;

2. The water purifier control circuit of claim 1, wherein: the power supply module comprises a voltage stabilizing chip U1 for stabilizing a first power supply into a third power supply, wherein the first power supply is a direct-current 12V power supply, and the third power supply is a direct-current 5V power supply;

The input end of the voltage stabilizing chip U1 is electrically connected with the first power supply, the input end of the voltage stabilizing chip U1 is electrically connected with the positive electrode end of the electrolytic capacitor C2, the negative electrode end of the electrolytic capacitor C2 is grounded, the input end of the voltage stabilizing chip U1 is grounded through the capacitor C4, the output end of the voltage stabilizing chip U1 is electrically connected with the third power supply, the output end of the voltage stabilizing chip U1 is grounded through the capacitor C3, the output end of the voltage stabilizing chip U1 is electrically connected with the positive electrode of the electrolytic capacitor C5, and the negative electrode of the electrolytic capacitor C5 is grounded.

3. The water purifier control circuit of claim 2, wherein: the ozone module comprises a triode Q2, a first IO port of a main control chip U2 is electrically connected with a base electrode of the triode Q2 through a resistor R3, the base electrode of the triode Q2 is grounded through a resistor R6, an emitting electrode of the triode Q2 is grounded, a collecting electrode of the triode Q2 is electrically connected with one end of a coil end of a relay K1 and an anode of a diode D3 respectively, the other end of the coil end of the relay K1 and a cathode of the diode D3 are electrically connected with a first power supply, one end of a contact end of the relay K1 is electrically connected with an alternating current live wire, the other end of the contact end of the relay K1 is electrically connected with one end of an ozone generator through an inductor L1, and the other end of the ozone generator is electrically connected with an alternating current zero line.

4. The water purifier control circuit of claim 2, wherein: the water pump module comprises a MOS tube Q4, a second IO port of the main control chip U2 is electrically connected with a grid electrode of the MOS tube Q4 through a resistor R8, the grid electrode of the MOS tube Q4 is grounded through a resistor R12, a source electrode of the MOS tube Q4 is grounded, a drain electrode of the MOS tube Q4 is electrically connected with an anode of a diode D5 and a cathode of a water pump respectively, the anode of the diode D5 and the anode of the water pump are electrically connected with a first power supply, and an anode of the water pump is electrically connected with the cathode of the water pump through a capacitor C7.

5. The water purifier control circuit of claim 2, wherein: the motor module comprises a triode Q3, the second power supply is a direct current 24V power supply, a third IO port of a main control chip U2 is electrically connected with a base electrode of the triode Q3 through a resistor R4, the base electrode of the triode Q3 is grounded through a resistor R7, an emitting electrode of the triode Q3 is grounded, a collecting electrode of the triode Q3 is electrically connected with an anode of a diode D4 and one end of a coil end of a relay K2 respectively, the other end of the coil end of the relay K2 and a cathode of the diode D4 are electrically connected with a first power supply, one end of a contact end of the relay K2 is electrically connected with the second power supply, the other end of the contact end of the relay K2 is electrically connected with a cathode of a diode D1 and an anode of a motor respectively, two ends of the diode D1 are connected with a capacitor C1 in parallel, the cathode of the motor and the anode of the diode D1 are grounded respectively, and the anode of the motor is electrically connected with the second power supply through a series resistor R1 and a capacitor C6.

6. The water purifier control circuit of claim 2, wherein: the three fan modules comprise a first resistor, a second resistor, a first MOS tube, a first diode and a first capacitor;

7. The water purifier control circuit of claim 2, wherein: the touch switch comprises a main control chip U2, and is characterized by further comprising a prompt module for prompting that the touch switch is triggered successfully, wherein the prompt module comprises a triode Q1 and a loudspeaker, a seventh IO port of the main control chip U2 is electrically connected with a base electrode of the triode Q1 through a resistor R2, the base electrode of the triode Q1 is grounded through a resistor R5, an emitter electrode of the triode Q1 is grounded, a collector electrode of the triode Q1 is electrically connected with an anode of a diode D2 and a cathode of the loudspeaker respectively, and an anode of the loudspeaker and a cathode of the diode D2 are electrically connected with a third power supply.

8. The water purifier control circuit of claim 1, wherein: the display module comprises a display driving chip U5, a plurality of LEDs matched with the touch switches one by one, a nixie tube driving chip U4 and a nixie tube;