Multifunctional faucet and using method thereof

Abstract

The invention relates to the technical field of faucets, in particular to a multifunctional faucet and a using method thereof.The multifunctional faucet comprises a vertical part and a transverse part, an inductive switch is arranged on the front side of the vertical part, a water outlet is formed in the lower side of the front end of the transverse part, and an antibacterial touch panel is arranged on the upper side face of the transverse part; the antibacterial touch panel is provided with a temperature display screen, a heating key, a cooling key, a hand sanitizer outlet key and a water outlet mode conversion key, a hand sanitizer outlet is formed in the bottom of the transverse part, water outlets comprise a shower opening and a direct flow opening, and the cold and hot water pipe is communicated with the shower opening and the direct flow opening through a switching electromagnetic valve. The hand sanitizer outlet is connected with a hand sanitizer bottle through a liquid inlet pipe, the liquid inlet pipe is connected with a peristaltic pump, temperature control and different function modes are selected through an antibacterial touch panel, the intelligent degree is improved, the intelligent hand sanitizer dispenser is suitable for various use scenes, the use experience of a user is improved, occupied space is reduced, intelligent water outlet and hand sanitizer outlet are achieved in cooperation with an inductive switch, and the intelligent hand sanitizer dispenser is convenient to use. Secondary pollution is prevented, and the use effect is improved.

Description

Technical Field

[0001] This invention relates to the field of faucet technology, and in particular to a multifunctional faucet and its method of use. Background Technology

[0002] A faucet is a common name for a water valve, used to control the flow of water. However, current faucets are not very intelligent and need to be turned on and off manually. Moreover, they have limited functions and cannot meet various needs such as washing hands, rinsing items, and getting water, which reduces efficiency and user experience. If multiple modes of faucets and hand sanitizer dispensers are set up, it will increase the countertop space. In addition, users touching the faucet before and after washing their hands can easily cause secondary pollution, reducing the effectiveness of use. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a multi-functional faucet and its usage method that are highly intelligent, versatile, suitable for various usage scenarios, improve user experience, reduce space occupation, and improve usage effect.

[0004] The technical solution adopted in this invention is as follows:

[0005] A multifunctional faucet includes a main body and hot and cold water pipes. The main body includes a vertical section and a horizontal section connected to the top of the vertical section. A sensor switch is provided on the front side of the vertical section. A water outlet is provided on the lower front side of the horizontal section, and an antibacterial touch panel is provided on its upper side. The antibacterial touch panel has a temperature display screen, a heating button, a cooling button, a hand sanitizer dispensing button, and a water dispensing mode switching button. A hand sanitizer dispensing port is provided at the bottom of the horizontal section and is located behind the water outlet. The water outlet includes a shower outlet and a direct flow outlet. The hot and cold water pipes are connected to a hot water inlet pipe and a cold water inlet pipe through a mixing solenoid valve, and are respectively connected to the shower outlet and the direct flow outlet through a switching solenoid valve. The antibacterial touch panel is electrically connected to a main controller. The hand sanitizer dispensing port is connected to a hand sanitizer bottle through an inlet pipe, and the inlet pipe is connected to a peristaltic pump. The peristaltic pump, the mixing solenoid valve, and the switching solenoid valve are all electrically connected to the main controller.

[0006] Preferably, the antibacterial touch panel includes a glass touch panel and a quantum dot photocatalytic coating, wherein the quantum dot photocatalytic coating is applied to the surface of the glass touch panel.

[0007] Preferably, a temperature sensing probe is installed inside the water outlet, and the temperature sensing probe is electrically connected to the main controller.

[0008] Preferably, a capacitive liquid level sensor is installed on the outer side of the hand sanitizer bottle wall, and the capacitive liquid level sensor is electrically connected to the main controller.

[0009] Preferably, a weighing sensor is installed at the bottom of the hand sanitizer bottle, and the weighing sensor is electrically connected to the main controller.

[0010] Preferably, the shower outlet includes several evenly arranged micro-water outlets, with the direct flow outlet located in the center of the shower outlet.

[0011] Preferably, the inductive switch is an infrared inductive switch.

[0012] Preferably, the switching solenoid valve is a three-position three-way solenoid valve.

[0013] The present invention also provides a method for using a multifunctional faucet, comprising the following steps:

[0014] S1. When the hand sanitizer mode and shower mode are turned on, and the palm is placed within the sensing range of the sensor switch, the main controller controls the peristaltic pump to start drawing a quantitative amount of hand sanitizer and discharging the hand sanitizer from the hand sanitizer outlet.

[0015] S2. When the palm leaves the sensing range of the induction switch, the main controller controls the peristaltic pump to turn off;

[0016] S3. When the palm is extended into the sensing range of the induction switch again, the main controller controls the switching solenoid valve to open and connects the outlet of the switching solenoid valve with the shower outlet.

[0017] S4. When the heating button is touched, the main controller controls the mixing solenoid valve to increase the proportion of hot water entering the pipe and increase the water temperature at the shower outlet. When the cooling button is touched, the main controller controls the mixing solenoid valve to increase the proportion of cold water entering the pipe and decrease the water temperature at the shower outlet.

[0018] S5. When the palm leaves the sensing range of the induction switch again, the main controller controls the switching solenoid valve to close.

[0019] Preferably, the following steps are included after step S5:

[0020] S6. Touch the hand sanitizer button to turn off the hand sanitizer mode, and touch the water dispensing mode switch button to switch the shower mode to direct current mode.

[0021] S7. When the palm of the hand is placed within the sensing range of the induction switch, the main controller controls the switching solenoid valve to open and connects the outlet of the switching solenoid valve to the DC port.

[0022] S8. When the heating button is touched, the main controller controls the mixing solenoid valve to increase the proportion of hot water entering the pipe and increase the outlet water temperature at the DC port. When the cooling button is touched, the main controller controls the mixing solenoid valve to increase the proportion of cold water entering the pipe and decrease the outlet water temperature at the DC port.

[0023] S9. When the palm leaves the sensing range of the induction switch, the main controller controls the switching solenoid valve to close.

[0024] The beneficial effects of this invention are as follows:

[0025] This multi-functional faucet features an antibacterial touch panel for temperature control and selection of different function modes, enhancing its intelligence. It is suitable for various usage scenarios, improves the user experience, reduces space occupation, and, in conjunction with a sensor switch, enables intelligent water and hand sanitizer dispensing, preventing secondary pollution and improving overall performance. Attached Figure Description

[0026] Figure 1 This is a front view of the multifunctional faucet of the present invention.

[0027] Figure 2 This is a left view of the multifunctional faucet of the present invention.

[0028] Figure 3 This is a top view of the multifunctional faucet of the present invention.

[0029] Figure 4 This is a schematic diagram of the water outlet structure.

[0030] Figure 5 This is a schematic diagram of the pipe connection for the multifunctional faucet of the present invention.

[0031] Figure 6 This is a first flowchart of the method of using the multifunctional faucet of the present invention.

[0032] Figure 7 This is a second flowchart illustrating the method of using the multifunctional faucet of the present invention.

[0033] In the diagram: 1. Vertical part; 2. Horizontal part; 3. Sensor switch; 4. Antibacterial touch panel; 5. Temperature display screen; 6. Heating button; 7. Cooling button; 8. Hand sanitizer dispensing button; 9. Water dispensing mode switching button; 10. Hand sanitizer dispensing port; 11. Shower outlet; 12. Direct water outlet; 13. Hot and cold water pipes; 14. Hot water inlet pipe; 15. Cold water inlet pipe; 16. Liquid inlet pipe; 17. Hand sanitizer bottle; 18. Water outlet. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1-5This invention provides a technical solution: a multi-functional faucet, including a main body and hot and cold water pipes 13. The main body includes a vertical part 1 and a horizontal part 2 connected to the top of the vertical part 1. A sensor switch 3 is provided on the front side of the vertical part 1. A water outlet 18 is provided on the lower front side of the horizontal part 2, and an antibacterial touch panel 4 is provided on its upper side. The antibacterial touch panel 4 is provided with a temperature display screen 5, a heating button 6, a cooling button 7, a hand sanitizer dispensing button 8, and a water dispensing mode conversion button 9. A hand sanitizer dispensing port 10 is provided at the bottom of the horizontal part 2. The liquid outlet 10 is located on the rear side of the water outlet 18. The water outlet 18 includes a shower outlet 11 and a direct outlet 12. The hot and cold water pipes 13 are connected to the hot water inlet pipe 14 and the cold water inlet pipe 15 through a mixing solenoid valve. They are also connected to the shower outlet 11 and the direct outlet 12 through a switching solenoid valve. The antibacterial touch panel 4 is electrically connected to the main controller. The hand sanitizer outlet 10 is connected to the hand sanitizer bottle 17 through an inlet pipe 16. The inlet pipe 16 is connected to a peristaltic pump. The peristaltic pump, the mixing solenoid valve, and the switching solenoid valve are all electrically connected to the main controller.

[0036] Temperature control and selection of different function modes are achieved through the antibacterial touch panel 4, enhancing the level of intelligence and making it suitable for various usage scenarios. This improves the user experience, reduces space occupation, and enables intelligent water and hand sanitizer dispensing in conjunction with the sensor switch 3. This eliminates the need to touch the faucet itself, effectively reducing the risk of cross-infection of bacteria and viruses, achieving contactless operation, preventing secondary pollution, and improving the effectiveness of use. The peristaltic pump ensures the quantitative dispensing of hand sanitizer, saving resources and preventing waste. The clear touch buttons on the antibacterial touch panel 4 make function selection intuitive and convenient for users.

[0037] To improve the antibacterial effect and prevent secondary pollution, in this embodiment, preferably, the antibacterial touch panel 4 includes a glass touch panel and a quantum dot photocatalytic coating. The quantum dot photocatalytic coating is applied to the surface of the glass touch panel. The smooth glass surface is not easy to trap dirt and grime, making cleaning and maintenance convenient. It is also waterproof and wear-resistant. The quantum dot photocatalytic coating can achieve continuous and long-lasting purification, high-efficiency antiviral and bactericidal functions, preventing secondary pollution.

[0038] To facilitate monitoring of the outlet water temperature, in this embodiment, preferably, a temperature sensing probe is provided inside the outlet 18. The temperature sensing probe is electrically connected to the main controller, and the temperature display screen 5 is electrically connected to the main controller. The purpose is to monitor the water in the outlet 18 through the temperature sensing probe, and the monitored temperature value is fed back to the main controller for processing and then displayed on the temperature display screen 5.

[0039] To facilitate monitoring of the liquid level in the hand sanitizer bottle 17, in this embodiment, preferably, a capacitive liquid level sensor is provided on the outer side of the bottle wall of the hand sanitizer bottle 17. The capacitive liquid level sensor is electrically connected to the main controller. The purpose is to form a capacitor by installing two electrodes on the outer side of the bottle wall. The space between the electrodes is mainly air, so the capacitance value is small. When the hand sanitizer replaces the air, the capacitance value increases. The capacitive liquid level sensor detects the capacitance change, converts it into an electrical signal, and transmits the electrical signal to the main controller. The main controller calculates the remaining liquid level. When the liquid level is lower than a preset threshold, the main controller controls the hand sanitizer button 8 to flash as a reminder. When the liquid level in the hand sanitizer bottle 17 is replenished, the main controller controls the hand sanitizer button 8 to stop flashing.

[0040] To facilitate monitoring of the liquid level in the hand sanitizer bottle 17, in this embodiment, preferably, a weighing sensor is provided at the bottom of the hand sanitizer bottle 17. The weighing sensor is electrically connected to the main controller. The purpose is to record the weight of the bottle when it is empty and the total weight when it is full, calculate the net weight of the liquid, and then continuously measure the current total weight through the weighing sensor. The weighing sensor converts the weight into an electrical signal and transmits the electrical signal to the main controller, which then calculates the remaining liquid level.

[0041] To facilitate application in various usage scenarios and improve user experience, in this embodiment, preferably, the shower outlet 11 includes several evenly arranged micro-water outlets, and the direct flow outlet 12 is located in the middle of the shower outlet 11. The purpose is to provide water similar to a shower head when the shower mode is turned on, with gentle water pressure and a large coverage area, suitable for washing hands and rinsing small items. When the direct flow mode is turned on, the water jet is concentrated and the water pressure is stronger, suitable for quickly receiving water and rinsing stains.

[0042] To prevent secondary pollution, in this embodiment, the preferred induction switch 3 is an infrared induction switch 3. The purpose is to detect the movement of a human body or object through the infrared pyroelectric effect, avoid direct contact, and reduce the risk of bacterial transmission. Traditional mechanical switches are easily damaged due to frequent pressing, while infrared induction switches have no physical contact, have a longer lifespan, and can automatically shut off when water is detected, effectively avoiding waste caused by forgetting to turn off the tap.

[0043] To facilitate switching between the water outlet 11 and the direct flow outlet 12, in this embodiment, preferably, the switching solenoid valve is a three-position three-way solenoid valve. The purpose is to give the switching solenoid valve three ports, namely a pressure inlet (connected to the outlet 18 of the hot and cold water pipe 13), outlet A (connected to the shower outlet 11), and outlet B (connected to the direct flow outlet 12). When coil A is energized, it generates a magnetic field, pushing the valve core to move to the right and closing outlet B. At this time, water flows out of the shower outlet 11. When coil B is energized, the valve core moves to the left and closes outlet A. At this time, water flows out of the direct flow outlet 12. When both coils are de-energized, the valve core returns to the neutral position under the action of the spring. At this time, all outlets 18 are disconnected.

[0044] Please see Figure 6 The present invention also provides a method for using a multifunctional faucet, comprising the following steps:

[0045] S1. When the hand sanitizer mode and shower mode are turned on, and the palm is placed within the sensing range of the sensor switch 3, the main controller controls the peristaltic pump to start quantitatively extracting hand sanitizer and discharging it from the hand sanitizer outlet.

[0046] S2. When the palm leaves the sensing range of the induction switch 3, the main controller controls the peristaltic pump to turn off;

[0047] S3. When the palm is extended into the sensing range of the induction switch 3 again, the main controller controls the switching solenoid valve to open and connects the outlet of the switching solenoid valve with the shower port 11.

[0048] S4. When the heating button 6 is touched, the main controller controls the mixing solenoid valve to increase the water inlet ratio of the hot water inlet pipe 14 and increase the water outlet temperature of the shower port 11. When the cooling button 7 is touched, the main controller controls the mixing solenoid valve to increase the water inlet ratio of the cold water inlet pipe 15 and decrease the water outlet temperature of the shower port 11.

[0049] S5. When the palm leaves the sensing range of the induction switch 3 again, the main controller controls the switching solenoid valve to close.

[0050] Please see Figure 7 To facilitate application in various usage scenarios and improve user experience, this embodiment preferably includes the following steps after step S5:

[0051] S6. Touch the hand sanitizer button 8 to turn off the hand sanitizer mode, and touch the water dispensing mode switch button 9 to switch the shower mode to direct current mode.

[0052] S7. When the palm extends into the sensing range of the induction switch 3, the main controller controls the switching solenoid valve to open and connects the outlet of the switching solenoid valve to the DC port 12.

[0053] S8. When the heating button 6 is touched, the main controller controls the mixing solenoid valve to increase the water inlet ratio of the hot water inlet pipe 14 and increase the water outlet temperature of the DC port 12. When the cooling button 7 is touched, the main controller controls the mixing solenoid valve to increase the water inlet ratio of the cold water inlet pipe 15 and decrease the water outlet temperature of the DC port 12.

[0054] S9. When the palm leaves the sensing range of the induction switch 3, the main controller controls the switching solenoid valve to close.

[0055] Example 1: Touching the hand sanitizer dispensing button 8 illuminates the button, indicating the hand sanitizer mode is activated. Touching the water dispensing mode switching button 9 illuminates the shower icon, switching the DC mode to shower mode. When a hand enters the sensing range of the induction switch 3, the main controller activates the peristaltic pump to dispense a measured amount of hand sanitizer and discharge it from the dispensing nozzle. When the hand leaves the sensing range of the induction switch 3, the main controller shuts off the peristaltic pump. When the hand returns to the sensing range of the induction switch 3, the main controller shuts off the peristaltic pump. The main controller controls the switching solenoid valve to open and connect the outlet of the switching solenoid valve to the shower outlet 11. When the heating button 6 is touched, the main controller controls the mixing solenoid valve to increase the water inlet ratio of the hot water inlet pipe 14, thereby increasing the water outlet temperature of the shower outlet 11. Each touch increases the water temperature by 1°C. When the cooling button 7 is touched, the main controller controls the mixing solenoid valve to increase the water inlet ratio of the cold water inlet pipe 15, thereby decreasing the water outlet temperature of the shower outlet 11. Each touch decreases the water temperature by 1°C. When the hand leaves the sensing range of the induction switch 3 again, the main controller controls the switching solenoid valve to close.

[0056] Example 2: Touching the hand sanitizer dispensing button 8 turns off the hand sanitizer dispensing mode. Touching the water dispensing mode switching button 9 turns on the DC icon, switching the shower mode to DC mode. When the palm is within the sensing range of the sensor switch 3, the main controller controls the switching solenoid valve to open and connects the outlet of the switching solenoid valve to the DC port 12. Touching the heating button 6 increases the water inlet ratio of the hot water inlet pipe 14, increasing the outlet water temperature of the DC port 12. Each touch increases the water temperature by 1°C. Touching the cooling button 7 increases the water inlet ratio of the cold water inlet pipe 15, decreasing the outlet water temperature of the DC port 12. Each touch decreases the water temperature by 1°C. When the palm leaves the sensing range of the sensor switch 3, the main controller controls the switching solenoid valve to close.

[0057] Example 3: Touching the hand sanitizer dispensing button 8 illuminates the button, indicating the hand sanitizer mode is activated. Touching the water dispensing mode switching button 9 illuminates the DC icon, switching the shower mode to DC mode. When a hand enters the sensing range of the induction switch 3, the main controller activates the peristaltic pump to dispense a measured amount of hand sanitizer and discharge it from the dispensing nozzle. When the hand leaves the sensing range of the induction switch 3, the main controller shuts off the peristaltic pump. When the hand returns to the sensing range of the induction switch 3, the main controller shuts off the peristaltic pump. The main controller controls the mixing solenoid valve to open and connect the outlet of the switching solenoid valve to the DC port 12. When the heating button 6 is touched, the main controller controls the mixing solenoid valve to increase the water inlet ratio of the hot water inlet pipe 14 and increase the water outlet temperature of the DC port 12. Each touch increases the water temperature by 1°. When the cooling button 7 is touched, the main controller controls the mixing solenoid valve to increase the water inlet ratio of the cold water inlet pipe 15 and decrease the water outlet temperature of the DC port 12. Each touch decreases the water temperature by 1°. When the palm leaves the sensing range of the induction switch 3 again, the main controller controls the switching solenoid valve to close.

[0058] Example 4: Touching the hand sanitizer dispensing button 8 turns off the hand sanitizer dispensing mode. Touching the water dispensing mode switching button 9 turns on the shower icon, switching the DC mode to shower mode. When the palm is within the sensing range of the sensor switch 3, the main controller controls the switching solenoid valve to open and connects the outlet of the switching solenoid valve to the shower outlet 11. Touching the heating button 6 increases the water inlet ratio of the hot water inlet pipe 14, increasing the outlet water temperature of the shower outlet 11. Each touch increases the water temperature by 1°C. Touching the cooling button 7 increases the water inlet ratio of the cold water inlet pipe 15, decreasing the outlet water temperature of the shower outlet 11. Each touch decreases the water temperature by 1°C. When the palm leaves the sensing range of the sensor switch 3, the main controller controls the switching solenoid valve to close.

[0059] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-functional faucet, comprising a main body and hot and cold water pipes (13), characterized in that: The main body includes a vertical part (1) and a horizontal part (2) connected to the top of the vertical part (1). The front side of the vertical part (1) is provided with a sensor switch (3). The lower front side of the horizontal part (2) is provided with a water outlet (18), and the upper side of the horizontal part (2) is provided with an antibacterial touch panel (4). The antibacterial touch panel (4) is provided with a temperature display screen (5), a heating button (6), a cooling button (7), a hand sanitizer dispensing button (8), and a water dispensing mode conversion button (9). The bottom of the horizontal part (2) is provided with a hand sanitizer dispensing port (10), which is located at the water outlet (18). On the rear side, the water outlet (18) includes a shower outlet (11) and a direct flow outlet (12). The hot and cold water pipe (13) is connected to the hot water inlet pipe (14) and the cold water inlet pipe (15) through a mixing solenoid valve, and is connected to the shower outlet (11) and the direct flow outlet (12) respectively through a switching solenoid valve. The antibacterial touch panel (4) is electrically connected to the main controller. The hand sanitizer outlet (10) is connected to the hand sanitizer bottle (17) through an inlet pipe (16). The inlet pipe (16) is connected to a peristaltic pump. The peristaltic pump, the mixing solenoid valve and the switching solenoid valve are all electrically connected to the main controller.

2. The multifunctional faucet according to claim 1, characterized in that: The antibacterial touch panel (4) includes a glass touch panel and a quantum dot photocatalytic coating, wherein the quantum dot photocatalytic coating is applied to the surface of the glass touch panel.

3. The multifunctional faucet according to claim 1, characterized in that: A temperature sensing probe is installed inside the water outlet (18), and the temperature sensing probe is electrically connected to the main controller.

4. The multifunctional faucet according to claim 1, characterized in that: The hand sanitizer bottle (17) is equipped with a capacitive liquid level sensor on the outer side of the bottle wall, and the capacitive liquid level sensor is electrically connected to the main controller.

5. The multifunctional faucet according to claim 1, characterized in that: The bottom of the hand sanitizer bottle (17) is equipped with a weighing sensor, which is electrically connected to the main controller.

6. The multifunctional faucet according to claim 1, characterized in that: The shower port (11) includes several evenly arranged micro-water outlets, and the direct flow port (12) is located in the middle of the shower port (11).

7. The multifunctional faucet according to claim 1, characterized in that: The inductive switch (3) is an infrared inductive switch (3).

8. The multifunctional faucet according to claim 1, characterized in that: The switching solenoid valve is a three-position three-way solenoid valve.

9. A method of using a multifunctional faucet based on any one of claims 1-8, characterized in that, Includes the following steps: S1. When the hand sanitizer mode and shower mode are turned on, and the palm is extended into the sensing range of the sensor switch (3), the main controller controls the peristaltic pump to start quantitatively extracting hand sanitizer and discharging the hand sanitizer from the hand sanitizer outlet. S2. When the palm leaves the sensing range of the induction switch (3), the main controller controls the peristaltic pump to turn off; S3. When the palm is extended into the sensing range of the induction switch (3) again, the main controller controls the switching solenoid valve to open and connects the outlet of the switching solenoid valve with the shower port (11). S4. When the heating button (6) is touched, the main controller controls the mixing solenoid valve to increase the water inlet ratio of the hot water inlet pipe (14) and increase the water outlet temperature of the shower port (11). When the cooling button (7) is touched, the main controller controls the mixing solenoid valve to increase the water inlet ratio of the cold water inlet pipe (15) and decrease the water outlet temperature of the shower port (11). S5. When the palm leaves the sensing range of the induction switch (3) again, the main controller controls the switching solenoid valve to close.

10. The method of using the multifunctional faucet according to claim 9, characterized in that, The following steps are included after step S5: S6. Touch the hand sanitizer button (8) to turn off the hand sanitizer mode, and touch the water dispensing mode switch button (9) to switch the shower mode to direct current mode. S7. When the palm is extended into the sensing range of the induction switch (3), the main controller controls the switching solenoid valve to open and connects the outlet of the switching solenoid valve to the DC port (12). S8. When the heating button (6) is touched, the main controller controls the mixing solenoid valve to increase the water inlet ratio of the hot water inlet pipe (14) and increase the water outlet temperature of the DC port (12). When the cooling button (7) is touched, the main controller controls the mixing solenoid valve to increase the water inlet ratio of the cold water inlet pipe (15) and decrease the water outlet temperature of the DC port (12). S9. When the palm leaves the sensing range of the induction switch (3), the main controller controls the switching solenoid valve to close.

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