A control circuit for a water purification device and a PCB board thereof
Patent Information
- Application Number
- CN202521313737.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-25
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-06-25
AI Technical Summary
[0004]本实用新型旨在解决现有净水设备温度感应和功率调节机制不够灵敏，无法快速适应负载变化，致使加热效率低下，难以在启动后迅速达到目标温度实现即热的技术难题
[0015]本实用新型的有益效果：本实用新型中，温度检测单元能够实时监测净水设备的出水温度，向主控单元反馈当下的出水温度；开关单元通过对出水状态的检测，确保净水设备仅在水流正常时启动加热，避免干烧或漏水加热等安全隐患；主控单元根据出水的温度和状态调整加热单元的功率输出，实现快速响应和高效加热；本实用新型通过主控单元协调温度检测单元、加热单元和开关单元的工作，使净水设备能够根据当前的出水情况，在启动后迅速将出水温度调节至目标温度，以实现即开即热。
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Figure CN224803382U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of household appliances, especially a control circuit for water purification equipment and a PCB thereof. BACKGROUND
[0002] In the existing water purification equipment, heating water function and normal temperature water function are usually equipped, however, the heating mode of the traditional water purification equipment usually needs a long preheating time, resulting in energy waste and poor user experience. The temperature sensing and power regulation mechanism of the water purification equipment on the market is not sensitive enough, which cannot quickly adapt to load changes, resulting in low heating efficiency, and the target temperature cannot be quickly reached after starting to achieve instant heating, affecting the user's experience.
[0003] It can be seen that the prior art needs to be improved and improved. INVENTION CONTENTS
[0004] The utility model aims at solving the technical problems that the temperature sensing and power regulation mechanism of the existing water purification equipment is not sensitive enough, which cannot quickly adapt to load changes, resulting in low heating efficiency, and it is difficult to quickly reach the target temperature after starting to achieve instant heating.
[0005] The utility model provides a control circuit for water purification equipment, including main control unit, temperature detection unit, heating unit and switch unit, main control unit is connected with temperature detection unit, heating unit and switch unit electricity respectively, temperature detection unit is used for real time monitoring the water temperature of water purification equipment, switch unit is used for detecting the water state of water purification equipment, heating unit is used for adjusting the heating power of water purification equipment.
[0006] As some sub-schemes of the above technical scheme, the control circuit for water purification equipment further includes a valve control unit, a filter core identification unit, a lamp ring control unit, a numerical control display unit, a communication unit, and a buzzer unit; the main control unit is electrically connected with the valve control unit, the filter core identification unit, the lamp ring control unit, the numerical control display unit, the communication unit, and the buzzer unit; the valve control unit is used for controlling the working state of the electromagnetic valve; the filter core identification unit is used for detecting the use state of the filter core of the water purification equipment; the lamp ring control unit is used for displaying the running state of the water purification equipment; the numerical control display unit is used for displaying the parameter information of the water purification equipment; the communication unit is used for realizing the interaction between the water purification equipment and external equipment; and the buzzer unit is used for sending a buzzer prompt signal.
[0007] As some sub-solutions of the above technical solution, the main control unit includes a fifth control chip U5; pin 22 of the fifth control chip U5 is connected to the temperature detection unit; pins 33 and 43 of the fifth control chip U5 are connected to the switching unit; pins 14, 15, and 16 of the fifth control chip U5 are connected to the heating unit; pins 17, 18, 19, and 20 of the fifth control chip U5 are connected to the valve control unit; pins 44, 45, and 47 of the fifth control chip U5 are electrically connected to the filter element identification unit; pins 29 and 30 of the fifth control chip U5 are electrically connected to the lamp ring control unit; pins 39 and 40 of the fifth control chip U5 are connected to the numerical control display unit; pins 1 and 2 of the fifth control chip U5 are connected to the communication unit; and pins 3 and 10 of the fifth control chip U5 are connected to the buzzer unit.
[0008] As some sub-solutions of the above technical solution, the control circuit for the water purification equipment further includes a voltage stabilizing unit; the voltage stabilizing unit is electrically connected to the main control unit, the temperature detection unit, the switching unit, the filter element identification unit, the lamp ring control unit, the digital control display unit, the communication unit and the buzzer unit; the voltage stabilizing unit is used to provide the operating voltage.
[0009] As some sub-solutions of the above technical solution, the voltage regulating unit includes a first control chip U1, a second control chip U2, an input protection module, a first voltage regulating module, and a second voltage regulating module; pins 1 and 4 of the second control chip U2 are connected to the input protection module, and pins 2 and 3 of the second control chip U2 are connected to the first voltage regulating module; pin 3 of the first control chip U1 is connected to the first voltage regulating module, and pin 2 of the first control chip U1 is connected to the second voltage regulating module; the first voltage regulating module is connected to pin 48 of the fifth control chip U5, the temperature detection unit, the switch unit, the filter identification unit, the lamp ring control unit, the digital control display unit, the communication unit, and the buzzer unit; the second voltage regulating module is connected to the communication unit.
[0010] As some sub-solutions of the above technical solution, the valve control unit includes a third control chip U3 and a solenoid valve control module; pins 1 and 2 of the third control chip U3 are connected to pin 20 of the fifth control chip U5; pins 3 and 4 of the third control chip U3 are connected to pin 19 of the fifth control chip U5; pins 5 and 6 of the third control chip U3 are connected to pin 18 of the fifth control chip U5; pin 7 of the third control chip U3 is connected to pin 17 of the fifth control chip U5; pins 10 to 16 of the third control chip U3 are electrically connected to the solenoid valve control module; the solenoid valve control module is used to control the working state of the solenoid valve.
[0011] As some sub-solutions of the above technical solution, the control circuit for the water purification equipment further includes a water pump detection unit, which is electrically connected to pin 21 of the fifth control chip U5, the first voltage regulator module and the solenoid valve control module; the water pump detection unit is used to detect whether the water pump is blocked.
[0012] As some sub-solutions of the above technical solution, the switching unit includes a water leakage switch module and a high-pressure switch module; the water leakage switch module is used to detect whether there is a water leakage, and the water leakage switch module is connected to pin 33 of the fifth control chip U5 and the first voltage regulator module; the high-pressure switch module is used to detect whether the water flow pressure reaches a preset value, and the high-pressure switch module is connected to pin 43 of the fifth control chip U5 and the first voltage regulator module.
[0013] As some sub-solutions of the above technical solution, the heating unit includes a pin connector, a faucet heating module, a high-power heating module, and a low-power heating module; the pin connector is connected to the faucet heating module, the high-power heating module, and the low-power heating module respectively; the low-power heating module is connected to pin 15 of the fifth control chip U5, the high-power heating module is connected to pin 16 of the fifth control chip U5, and the faucet heating module is connected to pin 14 of the fifth control chip U5; the faucet heating module is used to quickly heat the water at the outlet; the high-power heating module is used to meet the rapid heating requirements under high load conditions; and the low-power heating module is used to maintain the stability of the water temperature under low load conditions.
[0014] This application also provides a PCB board printed with the control circuit for a water purification device as described above.
[0015] The beneficial effects of this utility model are as follows: In this utility model, the temperature detection unit can monitor the outlet water temperature of the water purifier in real time and report the current outlet water temperature to the main control unit; the switching unit ensures that the water purifier only starts heating when the water flow is normal by detecting the outlet water status, avoiding safety hazards such as dry burning or water leakage during heating; the main control unit adjusts the power output of the heating unit according to the outlet water temperature and status to achieve rapid response and efficient heating; this utility model coordinates the work of the temperature detection unit, heating unit and switching unit through the main control unit, enabling the water purifier to quickly adjust the outlet water temperature to the target temperature after startup according to the current outlet water conditions, so as to achieve instant hot water. Attached Figure Description
[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 A circuit block diagram of the control circuit for a water purification device provided by this utility model; Figure 2 A circuit diagram of the main control unit in the control circuit of the water purification equipment provided by this utility model; Figure 3 A circuit diagram of the heating unit in the control circuit of a water purification device provided by this utility model; Figure 4 A circuit diagram of the temperature detection unit in the control circuit of a water purification device provided by this utility model; Figure 5 A circuit diagram of the switching unit in the control circuit of a water purification device provided by this utility model; Figure 6 A circuit diagram of the voltage stabilizing unit in the control circuit of a water purification device provided by this utility model; Figure 7 The circuit structure diagram of the valve control unit and water pump detection unit in the control circuit of the water purification equipment provided by this utility model; Figure 8 A circuit diagram of the communication unit in the control circuit of a water purification device provided by this utility model; Figure 9 A circuit diagram of the buzzer unit in the control circuit of a water purification device provided by this utility model; Figure 10 The circuit structure diagram of the filter cartridge identification unit in the control circuit of the water purification equipment provided by this utility model; Figure 11 The circuit structure diagram of the lamp ring control unit in the control circuit of the water purification equipment provided by this utility model; Figure 12The circuit structure diagram of the numerical control display unit in the control circuit of the water purification equipment provided by this utility model.
[0017] In the attached diagram: 1-Main control unit; 2-Temperature detection unit; 3-Heating unit; 4-Switch unit; 5-Voltage stabilizing unit; 6-Valve control unit; 7-Filter element identification unit; 8-Light ring control unit; 9-Digital control display unit; 10-Communication unit; 11-Buzzer unit; 12-Water pump detection unit. Detailed Implementation
[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0019] 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 relationship based on the directional or positional relationship 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.
[0020] In the description of this utility model, "several" means an indefinite quantity, "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. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the quantity of indicated technical features, or the order of the indicated technical features. The use of "and / or" throughout the text indicates three parallel solutions; for example, A and / or B indicates a solution satisfied by A, a solution satisfied by B, or a solution satisfied by both A and B.
[0021] In the description of this utility model, if there is a short phrase containing multiple parallel features, the modifier in the phrase defines the closest feature. For example, "B, C, and E connected to D are set on A" means that B is set on A, E is connected to D, and C is not defined. However, modifiers indicating the relationship between features, such as "interval setting" or "circular arrangement," do not fall into this category. Modifiers preceded by "all" define all features in the short phrase. For example, "B, C, and D are all set on A" means that B, C, and D are all set on A. In statements where the subject is omitted, the omitted subject is the subject of the preceding statement. That is, "A has B and includes C" means that A has B and A includes C.
[0022] 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.
[0023] The following is combined Figures 1 to 12 The embodiments of this utility model are described below.
[0024] A control circuit for a water purification device in this embodiment includes a main control unit 1, a temperature detection unit 2, a heating unit 3, and a switching unit 4. The main control unit 1 is electrically connected to the temperature detection unit 2, the heating unit 3, and the switching unit 4. The temperature detection unit 2 is used to monitor the outlet water temperature of the water purification device in real time. The switching unit 4 is used to detect the outlet water status of the water purification device. The heating unit 3 is used to adjust the heating power of the water purification device.
[0025] In this invention, the temperature detection unit 2 can monitor the outlet water temperature of the water purifier in real time and report the current outlet water temperature to the main control unit 1; the switch unit 4 ensures that the water purifier only starts heating when the water flow is normal by detecting the outlet water status, avoiding safety hazards such as dry burning or water leakage during heating; the main control unit 1 adjusts the power output of the heating unit 3 according to the outlet water temperature and status to achieve rapid response and efficient heating; this invention coordinates the work of the temperature detection unit 2, the heating unit 3 and the switch unit 4 through the main control unit 1, enabling the water purifier to quickly adjust the outlet water temperature to the target temperature after startup according to the current outlet water conditions, so as to achieve instant heating.
[0026] Specifically, the control circuit for the water purification equipment further includes a valve control unit 6, a filter element identification unit 7, an indicator light control unit 8, a digital control display unit 9, a communication unit 10, and a buzzer unit 11; the main control unit 1 is electrically connected to the valve control unit 6, the filter element identification unit 7, the indicator light control unit 8, the digital control display unit 9, the communication unit 10, and the buzzer unit 11 respectively; the valve control unit 6 is used to control the working state of the solenoid valve; the filter element identification unit 7 is used to detect the usage status of the filter element of the water purification equipment; the indicator light control unit 8 is used to display the operating status of the water purification equipment; the digital control display unit 9 is used to display the parameter information of the water purification equipment; the communication unit 10 is used to realize the interaction between the water purification equipment and external devices; and the buzzer unit 11 is used to emit a buzzer prompt signal.
[0027] In this embodiment, the valve control unit 6 determines whether the solenoid valve is normally open or closed by current detection; the filter element identification unit 7 is used to send different control signals according to the filtration requirements of the water purification equipment to guide the incoming water and pure water into different filter elements for filtration; the LED ring control unit 8 lights up the LED ring according to the instructions of the main control unit 1 to display the equipment status; the digital display unit 9 displays information such as the current water temperature and filter element life; the communication unit 10 realizes remote monitoring through the WiFi module, which includes the fourth control chip U4, which can be a chip of model ESP8266-12E; the buzzer unit emits an audible and visual alarm signal in abnormal situations.
[0028] Specifically, the main control unit 1 includes a fifth control chip U5; pin 22 of the fifth control chip U5 is connected to the temperature detection unit 2; pins 33 and 43 of the fifth control chip U5 are connected to the switch unit 4; pins 14, 15, and 16 of the fifth control chip U5 are connected to the heating unit 3; pins 17, 18, 19, and 20 of the fifth control chip U5 are connected to the valve control unit 6; pins 44, 45, and 47 of the fifth control chip U5 are electrically connected to the filter element identification unit 7; pins 29 and 30 of the fifth control chip U5 are electrically connected to the lamp ring control unit 8; pins 39 and 40 of the fifth control chip U5 are connected to the numerical control display unit 9; pins 1 and 2 of the fifth control chip U5 are connected to the communication unit 10; and pins 3 and 10 of the fifth control chip U5 are connected to the buzzer unit.
[0029] In this embodiment, the fifth control chip U5 can be a chip of model SC95F8617B. The temperature detection unit 2 also includes a temperature detection module and a turbidity detection module; wherein, the temperature detection module detects the outlet water temperature of the water purifier through an NTC thermistor, and is connected to pin 22 of the fifth control chip U5; the turbidity detection module realizes turbidity detection through a TDS sensor, and the turbidity detection module is connected to pins 36, 37, 38, 41, 42 and 46 of the fifth control chip U5.
[0030] Specifically, the control circuit for the water purification equipment further includes a voltage stabilizing unit 5; the voltage stabilizing unit 5 is electrically connected to the main control unit 1, the temperature detection unit 2, the switch unit 4, the filter element identification unit 7, the lamp ring control unit 8, the digital control display unit 9, the communication unit 10 and the buzzer unit 11; the voltage stabilizing unit 5 is used to provide the operating voltage.
[0031] Specifically, the voltage regulator unit 5 includes a first control chip U1, a second control chip U2, an input protection module, a first voltage regulator module, and a second voltage regulator module; pins 1 and 4 of the second control chip U2 are connected to the input protection module, and pins 2 and 3 of the second control chip U2 are connected to the first voltage regulator module; pin 3 of the first control chip U1 is connected to the first voltage regulator module, and pin 2 of the first control chip U1 is connected to the second voltage regulator module; the first voltage regulator module is connected to pin 48 of the fifth control chip U5, the temperature detection unit 2, the switch unit 4, the filter identification unit 7, the lamp ring control unit 8, the digital control display unit 9, the communication unit 10, and the buzzer unit 11; the second voltage regulator module is connected to the communication unit 10.
[0032] In this embodiment, the voltage regulator unit 5 converts the external 24V DC power supply into 5.5V and 3V DC voltages sequentially to power the main control unit 1 and other units. The voltage regulator unit 5 monitors the voltage status to ensure stable output voltage and prevent voltage fluctuations from affecting device performance. The second control chip U2 can be a power supply chip of model XL2596HVP-5.0, and the first control chip U1 can be a power supply chip of model CJA1117B-3.3.
[0033] Specifically, the valve control unit 6 includes a third control chip U3 and a solenoid valve control module; pins 1 and 2 of the third control chip U3 are connected to pin 20 of the fifth control chip U5; pins 3 and 4 of the third control chip U3 are connected to pin 19 of the fifth control chip U5; pins 5 and 6 of the third control chip U3 are connected to pin 18 of the fifth control chip U5; pin 7 of the third control chip U3 is connected to pin 17 of the fifth control chip U5; pins 10 to 16 of the third control chip U3 are electrically connected to the solenoid valve control module; the solenoid valve control module is used to control the working state of the solenoid valve.
[0034] In this embodiment, the solenoid valve control module in the valve control unit 6 determines whether the solenoid valve is normally open or closed by current detection; the detection result of the solenoid valve control module is fed back to the fifth control chip U5 through the signal interface of the third control chip U3. The third control chip U3 can be a chip with the model number ULN2003.
[0035] Specifically, the control circuit for the water purification equipment further includes a water pump detection unit 12, which is electrically connected to pin 21 of the fifth control chip U5, the first voltage regulator module, and the solenoid valve control module; the water pump detection unit 12 is used to detect whether the water pump is blocked.
[0036] In this embodiment, the water pump detection unit 12 determines the operating status of the booster pump and whether it has stalled by detecting current. The water pump detection unit 12 includes an operational amplifier circuit and a water pump detection circuit. The water pump detection circuit is electrically connected to the transport amplifier circuit and the solenoid valve control module, respectively. It obtains the voltage of the water pump when it is working by the sampling resistor on the booster pump CON5, thereby indirectly determining the operating status of the water pump. The transport amplifier circuit is connected to pin 21 of the first voltage regulator unit 5 and the fifth control chip U5, and is used to feed back the signal output by the water pump detection circuit to the main control unit 1. The voltage regulator unit 5 provides a 5V operating voltage to the transport amplifier unit.
[0037] Specifically, the switching unit 4 includes a water leakage switch module and a high-pressure switch module; the water leakage switch module is used to detect whether there is a water leakage, and the water leakage switch module is connected to pin 33 of the fifth control chip U5 and the first voltage regulator module; the high-pressure switch module is used to detect whether the water pressure reaches a preset value, and the high-pressure switch module is connected to pin 43 of the fifth control chip U5 and the first voltage regulator module.
[0038] In this embodiment, the switch unit 4 is used to identify the water flow status of the water purification equipment. If the leakage switch module detects a leak in the water pipe, it sends an alarm signal to the main control unit 1. If the high pressure switch module detects that the water pressure reaches a preset value, it sends a trigger signal to the main control unit 1 to trigger the start and stop of the heating unit 3.
[0039] Specifically, the heating unit 3 includes a pin connector, a faucet heating module, a high-power heating module, and a low-power heating module; the pin connector is connected to the faucet heating module, the high-power heating module, and the low-power heating module respectively; the low-power heating module is connected to pin 15 of the fifth control chip U5, the high-power heating module is connected to pin 16 of the fifth control chip U5, and the faucet heating module is connected to pin 14 of the fifth control chip U5; the faucet heating module is used to quickly heat the water at the outlet; the high-power heating module is used to meet the rapid heating requirements under high load conditions; and the low-power heating module is used to maintain the stability of the water temperature under low load conditions.
[0040] In this embodiment, pin 2 of the pin connector is connected to pin 16 of the high-power heating module and the fifth control chip U5, pin 4 of the pin connector is connected to pin 15 of the low-power heating module and the fifth control chip U5, pin 5 of the pin connector is connected to pin 14 of the faucet heating module and the fifth control chip U5, and pin 3 of the pin connector is connected to the faucet heating module. The fifth control chip U5 can output control signals to the faucet heating module, the low-power heating module and the high-power heating module through its pins 14, 15 and 16 to control their working status.
[0041] This application also provides a PCB board printed with the control circuit for a water purification device as described above.
[0042] The preferred embodiments of the present invention have been described in detail above, but the present disclosure is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of the present disclosure.
Claims
1. A control circuit for a water purification device, characterized in that, The system includes a main control unit, a temperature detection unit, a heating unit, and a switching unit. The main control unit is electrically connected to the temperature detection unit, the heating unit, and the switching unit. The temperature detection unit monitors the outlet water temperature of the water purifier in real time. The switching unit detects the outlet water status of the water purifier. The heating unit adjusts the heating power of the water purifier. The control circuit for the water purifier also includes a valve control unit, a filter cartridge identification unit, a light ring control unit, a digital display unit, a communication unit, and a buzzer unit. The main control unit is electrically connected to the valve control unit, the filter cartridge identification unit, the light ring control unit, the digital display unit, the communication unit, and the buzzer unit. The valve control unit controls the working status of the solenoid valve. The filter cartridge identification unit detects the usage status of the filter cartridge in the water purifier. The light ring control unit displays the operating status of the water purifier. The digital display unit displays the parameter information of the water purifier. The communication unit is used to implement… The interaction between the water purification equipment and external devices; the buzzer unit is used to emit a buzzer prompt signal; the main control unit includes a fifth control chip U5; pin 22 of the fifth control chip U5 is connected to the temperature detection unit; pins 33 and 43 of the fifth control chip U5 are connected to the switch unit; pins 14, 15, and 16 of the fifth control chip U5 are connected to the heating unit; pins 17, 18, 19, and 20 of the fifth control chip U5 are connected to the valve control unit; pins 44, 45, and 47 of the fifth control chip U5 are electrically connected to the filter cartridge identification unit; pins 29 and 30 of the fifth control chip U5 are electrically connected to the lamp ring control unit; pins 39 and 40 of the fifth control chip U5 are connected to the digital control display unit; pins 1 and 2 of the fifth control chip U5 are connected to the communication unit; pins 3 and 10 of the fifth control chip U5 are connected to the buzzer unit.
2. The control circuit for a water purification device according to claim 1, characterized in that: The control circuit for the water purification equipment further includes a voltage stabilizing unit; the voltage stabilizing unit is electrically connected to the main control unit, the temperature detection unit, the switching unit, the filter element identification unit, the lamp ring control unit, the digital control display unit, the communication unit, and the buzzer unit; the voltage stabilizing unit is used to provide the operating voltage.
3. The control circuit for a water purification device according to claim 2, characterized in that: The voltage regulator unit includes a first control chip U1, a second control chip U2, an input protection module, a first voltage regulator module, and a second voltage regulator module. Pins 1 and 4 of the second control chip U2 are connected to the input protection module, and pins 2 and 3 of the second control chip U2 are connected to the first voltage regulator module. Pin 3 of the first control chip U1 is connected to the first voltage regulator module, and pin 2 of the first control chip U1 is connected to the second voltage regulator module. The first voltage regulator module is connected to pin 48 of the fifth control chip U5, the temperature detection unit, the switch unit, the filter identification unit, the lamp ring control unit, the digital display unit, the communication unit, and the buzzer unit. The second voltage regulator module is connected to the communication unit.
4. The control circuit for a water purification device according to claim 3, characterized in that: The valve control unit includes a third control chip U3 and a solenoid valve control module; pins 1 and 2 of the third control chip U3 are connected to pin 20 of the fifth control chip U5; pins 3 and 4 of the third control chip U3 are connected to pin 19 of the fifth control chip U5; pins 5 and 6 of the third control chip U3 are connected to pin 18 of the fifth control chip U5; pin 7 of the third control chip U3 is connected to pin 17 of the fifth control chip U5; pins 10 to 16 of the third control chip U3 are electrically connected to the solenoid valve control module; the solenoid valve control module is used to control the working state of the solenoid valve.
5. The control circuit for a water purification device according to claim 4, characterized in that: The control circuit for the water purification equipment also includes a water pump detection unit, which is electrically connected to pin 21 of the fifth control chip U5, the first voltage regulator module, and the solenoid valve control module; the water pump detection unit is used to detect whether the water pump is stuck.
6. The control circuit for a water purification device according to claim 3, characterized in that: The switching unit includes a water leakage switch module and a high-pressure switch module; the water leakage switch module is used to detect whether there is a water leakage, and the water leakage switch module is connected to pin 33 of the fifth control chip U5 and the first voltage regulator module; the high-pressure switch module is used to detect whether the water pressure reaches a preset value, and the high-pressure switch module is connected to pin 43 of the fifth control chip U5 and the first voltage regulator module.
7. The control circuit for a water purification device according to claim 1, characterized in that: The heating unit includes a pin connector, a faucet heating module, a high-power heating module, and a low-power heating module. The pin connector is connected to the faucet heating module, the high-power heating module, and the low-power heating module, respectively. The low-power heating module is connected to pin 15 of the fifth control chip U5, the high-power heating module is connected to pin 16 of the fifth control chip U5, and the faucet heating module is connected to pin 14 of the fifth control chip U5. The faucet heating module is used to quickly heat the water at the outlet. The high-power heating module is used to meet the rapid heating requirements under high load conditions. The low-power heating module is used to maintain the stability of the water temperature under low load conditions.
8. A PCB board, characterized in that, The PCB board is printed with a control circuit for a water purification device as described in any one of claims 1-7.