A water dispenser control circuit

Abstract

This utility model discloses a water dispenser control circuit, including a main circuit board and a slave circuit board. The main circuit board includes a main control module, a button module, a display module, a serial communication module, and a main power supply module. The slave circuit board includes a secondary control module, a water level detection module, a brightness detection module, a secondary power supply module, a water pump drive module, a valve drive module, a heating module, and a cooling module. In this technical solution, the main circuit board is mainly used to receive control commands through the button module and output the water dispenser status through the display module. The slave circuit board is used to control the working status of corresponding components in the water dispenser through the water pump drive module, valve drive module, heating module, and cooling module according to the control commands transmitted by the main circuit board, the detection data from the brightness detection module, and the detection data from the water level detection module, thereby realizing the intelligent control function of the water dispenser and enabling the water dispenser to make soda water.

Description

Technical Field

[0001] This utility model relates to the field of water dispenser equipment technology, and more specifically to a water dispenser control circuit. Background Technology

[0002] Water dispensers are common and readily available electrical appliances in many places in daily life, used to provide drinking water. Traditional water dispensers mainly have two functions: cooling and heating drinking water. However, as people's demands for drinking water continue to increase, traditional water dispensers are gradually becoming unable to meet these needs. The shortcomings of traditional water dispensers lie in their poor controllability; they can only mechanically perform the functions of heating and cooling drinking water, lacking a high degree of intelligence. Furthermore, market analysis shows that some people prefer to drink soda water, but traditional water dispensers cannot produce soda water, thus failing to meet this demand. Utility Model Content

[0003] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a water dispenser control circuit.

[0004] The technical solution adopted by this utility model to solve the problem is:

[0005] A water dispenser control circuit includes a main circuit board and a slave circuit board;

[0006] The host circuit board includes a main control module, a button module, a display module, a serial communication module, and a main power module. The main control module is connected to the button module, the display module, and the serial communication module, respectively. The main power module is connected to the main control module, the button module, the display module, and the serial communication module, respectively.

[0007] The slave circuit board includes a secondary control module, a water level detection module, a brightness detection module, a secondary power supply module, a water pump drive module, a valve drive module, a heating module, and a cooling module. The secondary control module is connected to the water level detection module, the brightness detection module, the water pump drive module, the valve drive module, the heating module, and the cooling module, respectively. The secondary power supply module is connected to the secondary control module, the water level detection module, the brightness detection module, the water pump drive module, the valve drive module, the heating module, and the cooling module, respectively. The secondary control module is connected to the serial communication module.

[0008] As a further improvement to the above technical solution, the button module includes multiple button devices and a touch chip of model BS8112. The touch chip is configured with multiple input terminals, a clock terminal, and a data terminal. The main control module is configured with a first connection terminal and a second connection terminal. The button devices are connected to the input terminals of the touch chip in a one-to-one correspondence. The data terminal of the touch chip is connected to the first connection terminal of the main control module, and the clock terminal of the touch chip is connected to the second connection terminal of the main control module.

[0009] As a further improvement to the above technical solution, the display module includes a digital tube unit and an LED array unit;

[0010] The digital tube unit includes a TM1640 driver chip, resistors R1, R2, R3, and R4, capacitors C1 and C2, and an integrated digital tube. The driver chip is configured with a data terminal, a clock terminal, and multiple control terminals. The main control module is configured with a third connection terminal and a fourth connection terminal. The third connection terminal of the main control module is connected to one end of resistor R1 and one end of resistor R2, and the other end of resistor R2 is connected to the power supply terminal. The other end of resistor R1 is connected to the data terminal of the driver chip and one end of capacitor C1, and the other end of capacitor C1 is connected to the ground terminal. The fourth connection terminal of the main control module is connected to one end of resistor R3 and one end of resistor R4, and the other end of resistor R4 is connected to the power supply terminal. The other end of resistor R3 is connected to the clock terminal of the driver chip and one end of capacitor C2, and the other end of capacitor C2 is connected to the ground terminal. The control terminal of the driver chip is connected to the integrated digital tube.

[0011] The LED array unit includes a TM74HC595 latch chip and multiple LED devices. The latch chip is configured with a latch terminal, a clock terminal, a data terminal, and multiple output terminals. The main control module is configured with a fifth connection terminal, a sixth connection terminal, and a seventh connection terminal. The fifth connection terminal of the main control module is connected to the data terminal of the latch chip, the sixth connection terminal of the main control module is connected to the latch terminal of the latch chip, and the seventh connection terminal of the main control module is connected to the clock terminal of the latch chip. The output terminals of the latch chip are connected to the negative terminals of the LED devices one by one, and the positive terminals of each LED device are connected to the power supply terminal.

[0012] As a further improvement to the above technical solution, the serial communication module includes a communication interface, transient suppression diodes D1 and D2, inductors L1 and L2, resistors R5 and R6, and capacitors C3, C4, and C5. The communication interface is configured with a first communication terminal and a second communication terminal, and the main control module is configured with an eighth connection terminal and a ninth connection terminal. The first communication terminal of the communication interface is connected to one end of the transient suppression diode D1 and one end of the inductor L1, respectively. The other end of the transient suppression diode D1 is connected to ground. The other end of the inductor L1 is connected to one end of the resistor R5 and one end of the capacitor C3, respectively. The other end of the capacitor C3 is connected to ground. The other end of resistor R5 is connected to the eighth connection terminal of the main control module. The second communication terminal of the communication interface is connected to one end of transient suppression diode D2 and one end of inductor L2. The other end of transient suppression diode D2 is connected to ground. The other end of inductor L2 is connected to one end of resistor R6 and one end of capacitor C5. The other end of capacitor C5 is connected to ground. The other end of resistor R6 is connected to the ninth connection terminal of the main control module. One end of capacitor C4 is connected to the connection point of inductor L1 and resistor R5. The other end of capacitor C4 is connected to the connection point of inductor L2 and resistor R6. The communication interface is connected to the sub-control module.

[0013] As a further improvement to the above technical solution, the water level detection module includes a water level probe interface, an optocoupler U1, an operational amplifier U2, a transistor Q1, resistors R7, R8, R9, R10, R11, R12, R13, R14, R15, and R16, capacitors C6, C7, C8, and C9, and a diode D3. The secondary control module is equipped with a first connection terminal and a second connection terminal. The first connection terminal of the secondary control module is connected to the optocoupler. The cathode of U1 is connected, the anode of the optocoupler U1 is connected to the power supply terminal, the collector of the optocoupler U1 is connected to the power supply terminal, the emitter of the optocoupler U1 is connected to ground through resistor R7 and capacitor C7, the anode of diode D3 is connected to the junction of resistor R7 and capacitor C7, the cathode of diode D3 is connected to the water level probe interface through resistor R8, one end of capacitor C6 is connected to the cathode of diode D3, and the other end of capacitor C6 is connected to ground. One end of resistor R9 is connected to the positive terminal of diode D3, and the other end of resistor R9 is connected to the non-inverting input terminal of operational amplifier U2. The inverting input terminal of operational amplifier U2 is connected to ground through resistor R11. Capacitor C8 is connected in parallel with resistor R11. The inverting input terminal of operational amplifier U2 is connected to the power supply terminal through resistor R10. The inverting input terminal of operational amplifier U2 is connected to the output terminal of operational amplifier U2 through resistor R12. The output terminal of operational amplifier U2... The transistor Q1 is connected to ground via resistor R13 and capacitor C9. One end of resistor R14 is connected to the junction of resistor R13 and capacitor C9, and the other end of resistor R14 is connected to ground via resistor R15. The base of transistor Q1 is connected to the junction of resistor R14 and resistor R15. The emitter of transistor Q1 is connected to ground. The collector of transistor Q1 is connected to the power supply via resistor R16. The collector of transistor Q1 is connected to the second connection terminal of the sub-control module.

[0014] As a further improvement to the above technical solution, the brightness detection module includes an operational amplifier U3, a photoresistor RA, resistors R17, R18, R19, and R20, capacitors C10 and C11. The secondary control module is configured with a third connection terminal. One end of resistor R17 is connected to the power supply terminal, and the other end of resistor R17 is connected to the ground terminal through the photoresistor RA. Capacitor C10 is connected in parallel with the photoresistor RA. One end of resistor R18 is connected to the connection point of resistor R17 and photoresistor RA, and the other end of resistor R18 is connected to the non-inverting input terminal of operational amplifier U3. The inverting input terminal of operational amplifier U3 is connected to the output terminal of operational amplifier U3 through resistor R19. The output terminal of operational amplifier U3 is connected to the ground terminal through resistor R20 and capacitor C11. The third connection terminal of the secondary control module is connected to the connection point of resistor R20 and capacitor C11.

[0015] As a further improvement to the above technical solution, the cooling module includes an ice chamber port, a gate driver chip of model MCP1416, a switching transistor Q2, resistors R21, R22, R24, and R25. The gate driver chip is configured with an input terminal and an output terminal. The sub-control module is configured with a fourth connection terminal. The fourth connection terminal of the sub-control module is connected to ground through resistors R21 and R22. The input terminal of the gate driver chip is connected to the connection point of resistors R21 and R22. The output terminal of the gate driver chip is connected to the gate of the switching transistor Q2 through resistor R23. The gate of the switching transistor Q2 is connected to ground through resistor R24. The source of the switching transistor Q2 is connected to ground. The drain of the switching transistor Q2 is connected to the ice chamber port.

[0016] The beneficial effects of this utility model are as follows: In this technical solution, the water dispenser control circuit is divided into a main circuit board and a slave circuit board. The main circuit board is mainly used to receive control commands through the button module and output the water dispenser status through the display module. The slave circuit board is used to control the working status of the corresponding devices in the water dispenser through the water pump drive module, valve drive module, heating module and cooling module according to the control instructions transmitted by the main circuit board, the detection data of the brightness detection module and the detection data of the water level detection module, thereby realizing the intelligent control function of the water dispenser and realizing the function of making soda water. Attached Figure Description

[0017] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a circuit module framework diagram of the water dispenser in this utility model;

[0019] Figure 2 This is the circuit diagram of the button module in this utility model;

[0020] Figure 3 This is the circuit diagram of the digital tube unit in this utility model;

[0021] Figure 4 This is the circuit schematic diagram of the LED array unit in this utility model;

[0022] Figure 5 This is the circuit schematic diagram of the serial communication module in this utility model;

[0023] Figure 6 This is the circuit diagram of the water level detection module in this utility model;

[0024] Figure 7 This is the circuit diagram of the brightness detection module in this utility model;

[0025] Figure 8 This is the circuit diagram of the cooling module in this utility model. Detailed Implementation

[0026] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationships based on the directional or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] Reference Figures 1 to 8 This application discloses a water dispenser control circuit, the first embodiment of which includes a host circuit board and a slave circuit board;

[0031] The host circuit board includes a main control module, a button module, a display module, a serial communication module, and a main power module. The main control module is connected to the button module, the display module, and the serial communication module, respectively. The main power module is connected to the main control module, the button module, the display module, and the serial communication module, respectively.

[0032] The slave circuit board includes a secondary control module, a water level detection module, a brightness detection module, a secondary power supply module, a water pump drive module, a valve drive module, a heating module, and a cooling module. The secondary control module is connected to the water level detection module, the brightness detection module, the water pump drive module, the valve drive module, the heating module, and the cooling module, respectively. The secondary power supply module is connected to the secondary control module, the water level detection module, the brightness detection module, the water pump drive module, the valve drive module, the heating module, and the cooling module, respectively. The secondary control module is connected to the serial communication module.

[0033] The heating module is used to heat drinking water, specifically by controlling a relay to energize the heating element. The cooling module is used to cool drinking water, specifically by energizing the ice chamber. One or more valve drive modules are configured as needed, mainly for controlling the valves for hot and cold water and soda water. One or more water pump drive modules are configured as needed, mainly for realizing the water inlet and outlet functions.

[0034] Specifically, in this embodiment, the water dispenser control circuit is divided into a main circuit board and a slave circuit board. The main circuit board is mainly used to receive control commands through the button module and output the water dispenser status through the display module. The slave circuit board is used to control the working status of the corresponding components in the water dispenser through the water pump drive module, valve drive module, heating module and cooling module according to the control instructions transmitted by the main circuit board, the detection data of the brightness detection module and the detection data of the water level detection module, thereby realizing the intelligent control function of the water dispenser and realizing the function of making soda water.

[0035] As a further preferred embodiment, in this embodiment, the button module includes multiple button devices and a touch chip of model BS8112. The touch chip is configured with multiple input terminals, a clock terminal, and a data terminal. The main control module is configured with a first connection terminal and a second connection terminal. The button devices are connected to the input terminals of the touch chip in a one-to-one correspondence. The data terminal of the touch chip is connected to the first connection terminal of the main control module, and the clock terminal of the touch chip is connected to the second connection terminal of the main control module.

[0036] As a further preferred embodiment, in this embodiment, the display module includes a digital tube unit and an LED array unit;

[0037] The digital tube unit includes a TM1640 driver chip, resistors R1, R2, R3, and R4, capacitors C1 and C2, and an integrated digital tube. The driver chip is configured with a data terminal, a clock terminal, and multiple control terminals. The main control module is configured with a third connection terminal and a fourth connection terminal. The third connection terminal of the main control module is connected to one end of resistor R1 and one end of resistor R2, and the other end of resistor R2 is connected to the power supply terminal. The other end of resistor R1 is connected to the data terminal of the driver chip and one end of capacitor C1, and the other end of capacitor C1 is connected to the ground terminal. The fourth connection terminal of the main control module is connected to one end of resistor R3 and one end of resistor R4, and the other end of resistor R4 is connected to the power supply terminal. The other end of resistor R3 is connected to the clock terminal of the driver chip and one end of capacitor C2, and the other end of capacitor C2 is connected to the ground terminal. The control terminal of the driver chip is connected to the integrated digital tube.

[0038] The LED array unit includes a TM74HC595 latch chip and multiple LED devices. The latch chip is configured with a latch terminal, a clock terminal, a data terminal, and multiple output terminals. The main control module is configured with a fifth connection terminal, a sixth connection terminal, and a seventh connection terminal. The fifth connection terminal of the main control module is connected to the data terminal of the latch chip, the sixth connection terminal of the main control module is connected to the latch terminal of the latch chip, and the seventh connection terminal of the main control module is connected to the clock terminal of the latch chip. The output terminals of the latch chip are connected to the negative terminals of the LED devices one by one, and the positive terminals of each LED device are connected to the power supply terminal.

[0039] As a further preferred embodiment, in this embodiment, the serial communication module includes a communication interface, transient suppression diodes D1 and D2, inductors L1 and L2, resistors R5 and R6, capacitors C3, C4, and C5. The communication interface is configured with a first communication terminal and a second communication terminal. The main control module is configured with an eighth connection terminal and a ninth connection terminal. The first communication terminal of the communication interface is connected to one end of the transient suppression diode D1 and one end of the inductor L1, respectively. The other end of the transient suppression diode D1 is connected to ground. The other end of the inductor L1 is connected to one end of the resistor R5 and one end of the capacitor C3, respectively. The other end of the capacitor C3 is connected to ground. The communication interface is connected to the main control module. The other end of resistor R5 is connected to the eighth connection terminal of the main control module. The second communication terminal of the communication interface is connected to one end of transient suppression diode D2 and one end of inductor L2. The other end of transient suppression diode D2 is connected to ground. The other end of inductor L2 is connected to one end of resistor R6 and one end of capacitor C5. The other end of capacitor C5 is connected to ground. The other end of resistor R6 is connected to the ninth connection terminal of the main control module. One end of capacitor C4 is connected to the connection point of inductor L1 and resistor R5, and the other end of capacitor C4 is connected to the connection point of inductor L2 and resistor R6. The communication interface is connected to the secondary control module.

[0040] As a further preferred embodiment, in this embodiment, the water level detection module includes a water level probe interface, an optocoupler U1, an operational amplifier U2, an NPN transistor Q1, resistors R7, R8, R9, R10, R11, R12, R13, R14, R15, and R16, capacitors C6, C7, C8, and C9, and a diode D3. The secondary control module is configured with a first connection terminal and a second connection terminal. The first connection terminal of the secondary control module is connected to the... The cathode of the optocoupler U1 is connected to the power supply terminal, the anode of the optocoupler U1 is connected to the power supply terminal, the emitter of the optocoupler U1 is connected to ground through resistor R7 and capacitor C7, the anode of diode D3 is connected to the junction of resistor R7 and capacitor C7, the cathode of diode D3 is connected to the water level probe interface through resistor R8, one end of capacitor C6 is connected to the cathode of diode D3, and the other end of capacitor C6 is connected to ground. The resistor R9 is connected to the positive terminal of the diode D3, and the other end of the resistor R9 is connected to the non-inverting input terminal of the operational amplifier U2. The inverting input terminal of the operational amplifier U2 is connected to ground through the resistor R11. The capacitor C8 is connected in parallel with the resistor R11. The inverting input terminal of the operational amplifier U2 is connected to the power supply terminal through the resistor R10. The inverting input terminal of the operational amplifier U2 is connected to the output terminal of the operational amplifier U2 through the resistor R12. The output terminal is connected to ground via resistor R13 and capacitor C9. One end of resistor R14 is connected to the connection point of resistor R13 and capacitor C9, and the other end of resistor R14 is connected to ground via resistor R15. The base of transistor Q1 is connected to the connection point of resistor R14 and resistor R15. The emitter of transistor Q1 is connected to ground. The collector of transistor Q1 is connected to the power supply terminal via resistor R16. The collector of transistor Q1 is connected to the second connection terminal of the sub-control module.

[0041] As a further preferred embodiment, in this embodiment, the brightness detection module includes an operational amplifier U3, a photoresistor RA, resistors R17, R18, R19, and R20, capacitors C10 and C11. The sub-control module is configured with a third connection terminal. One end of resistor R17 is connected to the power supply terminal, and the other end of resistor R17 is connected to the ground terminal through the photoresistor RA. Capacitor C10 is connected in parallel with the photoresistor RA. One end of resistor R18 is connected to the connection point of resistor R17 and photoresistor RA, and the other end of resistor R18 is connected to the non-inverting input terminal of operational amplifier U3. The inverting input terminal of operational amplifier U3 is connected to the output terminal of operational amplifier U3 through resistor R19. The output terminal of operational amplifier U3 is connected to the ground terminal through resistor R20 and capacitor C11. The third connection terminal of the sub-control module is connected to the connection point of resistor R20 and capacitor C11.

[0042] As a further preferred embodiment, in this embodiment, the cooling module includes an ice chamber port, a gate driver chip of model MCP1416, a switching transistor Q2, resistors R21, R22, R24, and R25. The gate driver chip is configured with an input terminal and an output terminal. The sub-control module is configured with a fourth connection terminal. The fourth connection terminal of the sub-control module is connected to ground through resistors R21 and R22. The input terminal of the gate driver chip is connected to the connection point of resistors R21 and R22. The output terminal of the gate driver chip is connected to the gate of the switching transistor Q2 through resistor R23. The gate of the switching transistor Q2 is connected to ground through resistor R24. The source of the switching transistor Q2 is connected to ground. The drain of the switching transistor Q2 is connected to the ice chamber port.

[0043] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the concept of this utility model and the contents of the specification and drawings of this utility model, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A water dispenser control circuit, characterized in that: Includes both the main circuit board and the slave circuit board; The host circuit board includes a main control module, a button module, a display module, a serial communication module, and a main power module. The main control module is connected to the button module, the display module, and the serial communication module, respectively. The main power module is connected to the main control module, the button module, the display module, and the serial communication module, respectively. The slave circuit board includes a secondary control module, a water level detection module, a brightness detection module, a secondary power supply module, a water pump drive module, a valve drive module, a heating module, and a cooling module. The secondary control module is connected to the water level detection module, the brightness detection module, the water pump drive module, the valve drive module, the heating module, and the cooling module, respectively. The secondary power supply module is connected to the secondary control module, the water level detection module, the brightness detection module, the water pump drive module, the valve drive module, the heating module, and the cooling module, respectively. The secondary control module is connected to the serial communication module.

2. The water dispenser control circuit according to claim 1, characterized in that: The button module includes multiple button devices and a BS8112 touch chip. The touch chip is configured with multiple input terminals, a clock terminal, and a data terminal. The main control module is configured with a first connection terminal and a second connection terminal. The button devices are connected to the input terminals of the touch chip in a one-to-one correspondence. The data terminal of the touch chip is connected to the first connection terminal of the main control module, and the clock terminal of the touch chip is connected to the second connection terminal of the main control module.

3. The water dispenser control circuit according to claim 1, characterized in that: The display module includes a digital tube unit and an LED array unit; The digital tube unit includes a TM1640 driver chip, resistors R1, R2, R3, and R4, capacitors C1 and C2, and an integrated digital tube. The driver chip is configured with a data terminal, a clock terminal, and multiple control terminals. The main control module is configured with a third connection terminal and a fourth connection terminal. The third connection terminal of the main control module is connected to one end of resistor R1 and one end of resistor R2, and the other end of resistor R2 is connected to the power supply terminal. The other end of resistor R1 is connected to the data terminal of the driver chip and one end of capacitor C1, and the other end of capacitor C1 is connected to the ground terminal. The fourth connection terminal of the main control module is connected to one end of resistor R3 and one end of resistor R4, and the other end of resistor R4 is connected to the power supply terminal. The other end of resistor R3 is connected to the clock terminal of the driver chip and one end of capacitor C2, and the other end of capacitor C2 is connected to the ground terminal. The control terminal of the driver chip is connected to the integrated digital tube. The LED array unit includes a TM74HC595 latch chip and multiple LED devices. The latch chip is configured with a latch terminal, a clock terminal, a data terminal, and multiple output terminals. The main control module is configured with a fifth connection terminal, a sixth connection terminal, and a seventh connection terminal. The fifth connection terminal of the main control module is connected to the data terminal of the latch chip, the sixth connection terminal of the main control module is connected to the latch terminal of the latch chip, and the seventh connection terminal of the main control module is connected to the clock terminal of the latch chip. The output terminals of the latch chip are connected to the negative terminals of the LED devices one by one, and the positive terminals of each LED device are connected to the power supply terminal.

4. The water dispenser control circuit according to claim 1, characterized in that: The serial communication module includes a communication interface, transient suppression diodes D1 and D2, inductors L1 and L2, resistors R5 and R6, and capacitors C3, C4, and C5. The communication interface is configured with a first communication terminal and a second communication terminal. The main control module is configured with an eighth connection terminal and a ninth connection terminal. The first communication terminal of the communication interface is connected to one end of the transient suppression diode D1 and one end of the inductor L1, with the other end of the transient suppression diode D1 connected to ground. The other end of the inductor L1 is connected to one end of the resistor R5 and one end of the capacitor C3, with the other end of the capacitor C3 connected to ground. The resistor R5... The other end is connected to the eighth connection terminal of the main control module. The second communication terminal of the communication interface is connected to one end of the transient suppression diode D2 and one end of the inductor L2. The other end of the transient suppression diode D2 is connected to ground. The other end of the inductor L2 is connected to one end of the resistor R6 and one end of the capacitor C5. The other end of the capacitor C5 is connected to ground. The other end of the resistor R6 is connected to the ninth connection terminal of the main control module. One end of the capacitor C4 is connected to the connection point of the inductor L1 and the resistor R5. The other end of the capacitor C4 is connected to the connection point of the inductor L2 and the resistor R6. The communication interface is connected to the sub-control module.

5. A water dispenser control circuit according to claim 1, characterized in that: The water level detection module includes a water level probe interface, an optocoupler U1, an operational amplifier U2, a transistor Q1, resistors R7, R8, R9, R10, R11, R12, R13, R14, R15, and R16, capacitors C6, C7, C8, and C9, and a diode D3. The secondary control module is equipped with a first connection terminal and a second connection terminal. The first connection terminal of the secondary control module is connected to the cathode of the optocoupler U1. The anode of optocoupler U1 is connected to the power supply terminal. The collector of optocoupler U1 is also connected to the power supply terminal. The emitter of optocoupler U1 is connected to ground via resistor R7 and capacitor C7. The anode of diode D3 is connected to the junction of resistor R7 and capacitor C7. The cathode of diode D3 is connected to the water level probe interface via resistor R8. One end of capacitor C6 is connected to the cathode of diode D3, and the other end is connected to ground. One end of resistor R9 is connected to the anode of diode D3, and the other end is connected to the non-inverting input of operational amplifier U2. The inverting input of operational amplifier U2 is connected to ground via resistor R11. Capacitor C8 is connected in parallel with resistor R11. The inverting input of operational amplifier U2 is connected to the power supply terminal via resistor R10. The inverting input of operational amplifier U2 is connected to the output of operational amplifier U2 via resistor R12. The output of operational amplifier U2 is connected via... The resistor R13 and the capacitor C9 are connected to ground. One end of the resistor R14 is connected to the junction of the resistor R13 and the capacitor C9. The other end of the resistor R14 is connected to ground through the resistor R15. The base of the transistor Q1 is connected to the junction of the resistor R14 and the resistor R15. The emitter of the transistor Q1 is connected to ground. The collector of the transistor Q1 is connected to the power supply through the resistor R16. The collector of the transistor Q1 is connected to the second connection terminal of the sub-control module.

6. A water dispenser control circuit according to claim 1, characterized in that: The brightness detection module includes an operational amplifier U3, a photoresistor RA, resistors R17, R18, R19, and R20, and capacitors C10 and C11. The secondary control module is equipped with a third connection terminal. One end of resistor R17 is connected to the power supply terminal, and the other end of resistor R17 is connected to the ground terminal through the photoresistor RA. Capacitor C10 is connected in parallel with the photoresistor RA. One end of resistor R18 is connected to the connection point of resistor R17 and photoresistor RA, and the other end of resistor R18 is connected to the non-inverting input terminal of operational amplifier U3. The inverting input terminal of operational amplifier U3 is connected to the output terminal of operational amplifier U3 through resistor R19. The output terminal of operational amplifier U3 is connected to the ground terminal through resistor R20 and capacitor C11. The third connection terminal of the secondary control module is connected to the connection point of resistor R20 and capacitor C11.

7. A water dispenser control circuit according to claim 1, characterized in that: The cooling module includes an ice chamber port, an MCP1416 gate driver chip, a switching transistor Q2, resistors R21, R22, R24, and R25. The gate driver chip has an input terminal and an output terminal. The sub-control module has a fourth connection terminal, which is connected to ground via resistors R21 and R22. The input terminal of the gate driver chip is connected to the junction of resistors R21 and R22. The output terminal of the gate driver chip is connected to the gate of the switching transistor Q2 via resistor R23. The gate of the switching transistor Q2 is connected to ground via resistor R24. The source of the switching transistor Q2 is connected to ground, and the drain of the switching transistor Q2 is connected to the ice chamber port.

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