A multifunctional hand washing machine based on STM32 chip control

Abstract

The invention discloses a multifunctional hand washer based on STM32 chip control, including a back plate provided with a faucet, an infrared sensor provided outside the faucet, a box provided above the faucet, a paper dispenser and a soap bottle connected to the faucet provided in the box, a paper outlet provided at the lower end surface of the box, a wash basin provided just below the faucet, and a control circuit provided in the box. The control circuit includes an MCU controller, and a solenoid valve circuit provided in a solenoid valve, a water supply sensor circuit provided in the faucet, a paper towel sensor circuit provided in the paper dispenser, a soap sensor circuit provided in the soap bottle, a wastewater sensor circuit provided in the wash basin, an infrared sensor circuit provided in the faucet, a foam pump circuit provided in a foam pump, and a paper dispenser circuit provided in the paper dispenser. By adopting the above-mentioned arrangement, it has the advantages of realizing the functions of washing hands and flushing and wiping hands at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of hand washing machines, and in particular to a multifunctional hand washing machine based on an STM32 control circuit. Background Art

[0002] As people's living standards improve, hand washers are used more and more widely, and the structure of hand washers is also gradually being updated, thus forming various styles of hand washers. The existing hand washers include a shell, in which hand wash liquid is arranged, and two faucets are arranged outside the shell, one faucet is connected to a water supply pipe, and the other faucet is connected to the hand wash liquid through a foam pump, and the pumping action of the foam pump is used to generate soap foam for washing hands.

[0003] However, the existing hand-washing machine cannot realize other functions such as flushing and wiping hands while washing hands. Therefore, when it is necessary to realize this function, it is necessary to purchase corresponding equipment again, which increases the cost, and the split installation brings difficulties to the installation operation. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a multifunctional hand washer based on STM32 chip control which realizes other functions such as flushing and wiping hands in addition to the hand washing function.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A multifunctional hand washer based on STM32 chip control, comprising a back panel, the back panel is provided with a faucet controlled by a solenoid valve, an infrared sensor for induction triggering the solenoid valve is provided outside the faucet, the back panel is provided with a box body above the faucet, a soap bottle is provided in the box body, the soap bottle is connected to the faucet through a foam pump, a paper dispenser is provided in the box body, a paper outlet for paper towels to flow out is provided on the lower end surface of the box body, a wash basin is provided on the back panel directly below the faucet, and the box body is provided with control circuits for respectively controlling the paper dispenser, the foam pump, the solenoid valve, and the infrared sensor;

[0007] Furthermore, the control circuit includes an MCU controller, and a solenoid valve circuit arranged in the solenoid valve, a water supply sensor circuit arranged in the faucet, a paper towel sensor circuit arranged in the paper dispenser, a soap sensor circuit arranged in the soap bottle, a waste water sensor circuit arranged in the wash basin, an infrared sensor circuit arranged in the faucet, a foam pump circuit arranged in the foam pump and a paper dispenser circuit arranged in the paper dispenser, which are respectively connected to the MCU controller, and a power supply circuit for powering the solenoid valve circuit, the water supply sensor circuit, the paper towel sensor circuit, the soap sensor circuit, the waste water sensor circuit, the infrared sensor circuit, the foam pump circuit and the paper dispenser circuit.

[0008] Furthermore, the box is provided with a lighting lamp whose light source is facing the faucet, and the MCU controller is connected to a lighting lamp circuit arranged in the lighting lamp. When the 18th pin of the MCU controller receives a low-level signal, the lighting lamp lights up, and the power supply circuit supplies power to the lighting lamp circuit.

[0009] Furthermore, the surface of the box is provided with four adjustment buttons for respectively controlling the working time of the foam pump, controlling the pause delay of the hand washing machine working time, controlling the water supply start time of the solenoid valve, and controlling the outflow time of paper towels of the paper dispenser. The four adjustment buttons are respectively connected to the MCU controller through lines, and the ends of the four adjustment buttons away from the MCU controller are respectively connected to key circuits arranged in parallel with each other, and the power supply circuit supplies power to the key circuits; the MCU controller is connected to a digital tube display circuit powered by the power supply circuit.

[0010] Furthermore, the MCU controller will save the parameters to the internal storage space of its single chip microcomputer five seconds after the four adjustment buttons have been adjusted.

[0011] Furthermore, four process lights are arranged on the outer surface of the box, an identification mark is arranged on the outer surface of the box on one side of the process lights, the MCU controller is connected to a process light circuit for controlling the lighting of the process lights, and the power supply circuit supplies power to the process light circuit.

[0012] Furthermore, the power supply circuit includes an internal power supply circuit and an external power supply circuit connected to each other, and both the internal power supply circuit and the external power supply circuit are connected to the MCU circuit;

[0013] Furthermore, the internal power supply circuit adopts a DC-DC power supply structure. After being controlled by a switch, the internal power supply circuit enters the DC-DC synchronous system to supply power to the MCU controller, solenoid valve circuit, water supply sensor circuit, paper towel sensor circuit, soap sensor circuit, wastewater sensor circuit, infrared sensor circuit, foam pump circuit, paper dispenser circuit, etc. of the control circuit. The internal power supply circuit adopts the MP1470 power chip.

[0014] Furthermore, after the infrared sensor receives the trigger signal, the MCU circuit turns on the external power supply circuit to supply power to the solenoid valve circuit and the lighting circuit. The external power supply circuit uses the MP1484 power chip, and the maximum output power of the MP1484 power chip is 3A.

[0015] Furthermore, the MCU controller is a control system of an STM32 series single-chip microcomputer using an ARM architecture.

[0016] Furthermore, the back panel is provided with a plurality of connecting grooves, a bending plate is arranged inside the box, the two bending surfaces of the bending plate are arranged perpendicular to each other, one of the bending surfaces of the bending plate is cut and stamped to form a plurality of hooks, the plurality of hooks are embedded and protruded outside the box, the hook mouths of the hooks are arranged downward, and the plurality of hooks are respectively hooked with the plurality of connecting grooves.

[0017] Furthermore, a placement rack is provided in the box, the placement rack is arranged in a concave shape, the concave opening of the placement rack is arranged upward, the soap bottle is arranged in the concave opening of the placement rack, and the soap bottle is connected to the faucet through a foam pump;

[0018] Furthermore, the faucet includes an outer tube, in which a water supply pipe and an infusion tube connected to the liquid outlet of the foam pump are arranged, the water supply pipe and the infusion tube are connected by the same three-way pipe, the three-way pipe is connected with a liquid outlet pipe, the three pipe openings of the three-way pipe are respectively connected with the water supply pipe, the infusion tube and the liquid outlet pipe, the end of the liquid outlet pipe away from the three-way pipe is connected with a pipe joint, the end of the pipe joint away from the liquid outlet pipe is connected with a water outlet, the water outlet is plugged with an installation plug, the water outlet passes through the installation plug, the installation plug is plugged with the end of the outer tube, the infrared sensor is plugged with the end face of the installation plug close to the water outlet end of the water outlet, and the infrared sensor controls the opening and closing of the water supply pipe and the infusion tube.

[0019] The present invention has the following beneficial effects:

[0020] The invention discloses a multifunctional hand washer based on STM32 chip control. A faucet is arranged on the side of a back plate as a base, so that the hand washer can discharge tap water for hand washing. A box is arranged on the back plate, so that a soap bottle and a paper dispenser can be stored and installed in the box, so as to save the use space. A sealed door is arranged to open and close the inside of the box, so that the soap bottle in the box can be replaced or paper towels can be added by opening the sealed door. Since the soap bottle is connected with the faucet through a foam pump, the soap in the soap bottle is repeatedly bubbled to generate foam under the operation of the foam pump. The foam pump continues to work so that the soap foam is discharged from the faucet outlet. The electromagnetic valve is opened to make tap water flow to the hands for hand washing. The paper outlet is arranged, and when hand washing is finished, the paper dispenser is started, so that the paper towel flows out of the paper outlet for a distance, and then the paper towel is cut off, so as to wipe the hands after hand washing. At the same time, a wash basin is also provided so that the waste water from hand washing can be collected in the wash basin, or the wash basin can be filled with a certain amount of tap water before hand washing. Since the wash basin usually has a closable drain outlet, the waste water generated after hand washing can be discharged to the corresponding municipal pipeline through the drain outlet, thereby realizing that the hand washing machine can realize beneficial functions such as flushing waste water and wiping hands in addition to the hand washing function.

[0021] In addition, by setting a control circuit, the function of intelligent operation of the hand washing machine is realized. By setting an MCU controller as a central processing device, it is used to connect the solenoid valve circuit, the water supply sensor circuit, the paper towel sensor circuit, the soap sensor circuit, the wastewater sensor circuit, the infrared sensor, the foam pump circuit and the paper dispenser circuit, wherein the water supply sensor circuit, the paper towel sensor circuit, the soap sensor circuit, the wastewater sensor circuit and the infrared sensor are mainly used to sense external information, and are respectively used to judge whether there is a lack of water, whether there is a lack of paper, whether there is a lack of soap, whether the wastewater is full and whether there are hands that need to be washed, so as to transmit the corresponding sensing signal to the MCU controller. After the control processing of the MCU controller, the sensing signal is transmitted to the corresponding working output end, for example, the solenoid valve circuit: The infrared sensor circuit senses human hands to trigger the solenoid valve circuit, thereby opening or closing the faucet to control the water output; Foam pump sensor circuit: The infrared sensor circuit senses human hands to trigger the foam pump sensor circuit to discharge soap foam. In addition, the soap sensor circuit senses whether there is enough soap in the soap bottle. When the soap sensor senses that there is enough soap, the foam pump sensor works normally. When the soap sensor senses that there is insufficient soap, the foam pump stops working; Paper dispenser circuit: After washing hands, the infrared sensor cannot sense human hands, then the sensing signal is transmitted to the MCU controller, and the MCU controller is used to transmit the signal to the paper dispenser, thereby triggering the paper dispenser to discharge the paper towel out of the paper outlet, making it convenient to wipe your hands after taking out the paper towel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is an exploded view of the overall structure of the present invention.

[0024] Figure 3 It is a structural schematic diagram of the box body of the present invention.

[0025] Figure 4 It is a schematic structural diagram of the bent plate of the present invention.

[0026] Figure 5 This is a schematic structural diagram of the box body from another perspective of the present invention.

[0027] Figure 6 It is a schematic structural diagram of the faucet of the present invention.

[0028] Figure 7 It is a cross-sectional view of the faucet of the present invention.

[0029] Figure 8 It is an exploded view of the faucet of the present invention.

[0030] Fig. 9 for Figure 8 A partial enlarged view of point A in the middle.

[0031] Fig.10 is a circuit diagram of a control circuit of the present invention.

[0032] Fig.11 It is a circuit diagram of the power supply circuit of the present invention.

[0033] Fig.12 This is a circuit diagram of the water supply, paper towel, soap liquid, and wastewater sensor circuit of the present invention.

[0034] Fig.13 It is a circuit diagram of the foam pump circuit of the present invention.

[0035] Fig.14 It is a circuit diagram of the paper discharge machine circuit of the present invention.

[0036] Fig.15 The figure is a circuit diagram of the lighting lamp circuit of the present invention.

[0037] Fig.16 This is a circuit diagram of the adjustment button circuit of the present invention.

[0038] Fig.17 It is a circuit diagram of the process light circuit of the present invention.

[0039] In the figure: 1. back plate; 11. connecting groove; 2. faucet; 21. outer tube; 211. end cover; 212. round groove; 213. mounting block; 214. mounting groove; 215. through groove; 22. water supply pipe; 23. infusion pipe; 24. three-way pipe; 25. pipe joint; 251. connecting head; 252. insert head; 253. stud pipe; 254. connecting column; 255. threaded pipe; 26. liquid outlet pipe; 27. water outlet head; 271. water outlet hole; 28. mounting plug; 29. ​​infrared sensor; 3. wash basin; 4. box; 41. placement rack; 42. soap bottle; 43. paper dispenser; 44. paper outlet; 45. sealing door; 451. adjustment button; 452. process light; 46. bending plate; 461. hook. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The terms such as "upper", "inner", "middle", "left", "right" and "one" cited in this specification are only for the convenience of description, and are not used to limit the scope of the present invention. The change or adjustment of their relative relationship shall also be regarded as the scope of the present invention without substantially changing the technical content.

[0041] Mechanical structure of hand washing machine:

[0042] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, a multifunctional hand washer based on STM32 chip control includes a long strip-shaped back panel 1, a faucet 2 controlled by a solenoid valve is embedded in the middle of the back panel 1 along the length direction, the faucet 2 is connected to a municipal water supply pipe 22, an infrared sensor 29 for sensing and triggering the solenoid valve is installed in the faucet 2, a box 4 is installed on the back panel 1 above the faucet 2, a soap bottle 42 for storing soap liquid is installed in the box 4, the soap bottle 42 is connected to the faucet 2 through a foam pump, the foam pump is used to work in the soap bottle 42 to make the soap liquid into foam, and the foamy soap liquid in the soap bottle 42 is pumped to the position of the faucet 2 by the pumping function of the foam pump. A sealing door 45 for opening and closing the box 4 is hinged on the side of the box 4 away from the back plate 1. The sealing door 45 is connected to the box 4 through a magnet. A paper dispenser 43 for pulling out rolled paper towels is installed in the box 4. A paper outlet 44 for the paper towels to flow out is provided on the lower end surface of the box 4. The paper outlet 44 and the paper dispenser 43 are arranged opposite to each other. A wash basin 3 is installed on the back plate 1 directly below the faucet 2 to provide a space for washing hands and to hold waste water generated during washing hands. The sealing door 45 of the box 4 is provided with control circuits that respectively control the paper dispenser 43, the foam pump, the solenoid valve, and the infrared sensor 29.

[0043] Specifically, by arranging a faucet 2 on the side with the back plate 1 as the base, it is convenient for the hand washing machine to discharge tap water for washing hands. By arranging a box body 4 on the back plate 1, it is convenient to store and install a soap bottle 42 and a paper dispenser 43 in the box body 4, so as to achieve the effect of saving use space. By arranging a sealing door 45 to open and close the interior of the box body 4, it is convenient to replace the soap bottle 42 or add paper towels in the box body 4 by opening the sealing door 45. Since the soap bottle 42 is connected to the faucet 2 through the foam pump, under the operation of the foam pump, the soap in the soap bottle 42 repeatedly bubbles to generate foam. Continuing to work the foam pump causes the soap foam to be discharged from the outlet of the faucet 2. By opening the solenoid valve, tap water flows to the hands for hand washing. By arranging a paper outlet 44, when hand washing is completed, by starting the paper dispenser 43, the paper towel flows out of the position of the paper outlet 44 for a distance, and then the paper towel is cut off, so as to facilitate wiping hands after washing hands. At the same time, a wash basin 3 is also provided so that the waste water from washing hands can be collected in the wash basin 3, or the wash basin 3 can be filled with a certain amount of tap water before the hand washing operation is performed. Since the wash basin 3 usually has a closable drain port, the waste water generated after washing hands can be discharged to the corresponding municipal pipeline through the drain port, thereby realizing that the hand washing machine can realize beneficial functions such as flushing waste water and wiping hands in addition to the hand washing function.

[0044] Reference Figures 2 to 5 As shown, in order to realize the function of connecting the box body 4 and the back plate 1 to each other, a plurality of connecting grooves 11 are opened on the plane of the back plate 1, a bending plate 46 is installed in the box body 4, and two bending surfaces of the bending plate 46 are arranged perpendicular to each other. One bending surface of the bending plate 46 is cut and stamped to form a plurality of hooks 461 arranged in an array, and the plurality of hooks 461 are distributed along the bending fold edge direction of the bending plate 46 at intervals, and the plurality of hooks 461 are arranged at the bending end away from the bending plate 46, and the bending plate 46 is arranged by The screws are locked and connected to the inner wall of the box body 4, the bent surface of the bent plate 46 that is not punched to form the hook 461 abuts against the inner bottom surface of the box body 4 along the height direction, and the bent surface of the bent plate 46 that is punched to form the hook 461 abuts against the inner side wall of the box body 4 away from the sealing door 45. A number of hooks 461 are embedded and protruded outside the box body 4, and the hook mouths of the hooks 461 are arranged downward. The number of hooks 461 are respectively opposite to the number of connecting grooves 11, and the hooks 461 are hooked with the connecting grooves 11.

[0045] In order to facilitate the replacement of the soap bottle 42 in the box 4, a placement rack 41 is connected to the box 4 by screws. The placement rack 41 is set in a "concave" shape. The placement rack 41 is made by a bending molding process. The "concave" opening of the placement rack 41 is set upward. The soap bottle 42 is placed in the "concave" opening of the placement rack 41, and the soap bottle 42 is connected to the faucet 2 through a foam pump.

[0046] Reference Figures 6 to 9As shown, in order to realize the function that the faucet 2 can discharge not only tap water but also soap foam, the faucet 2 includes an outer tube 21, in which a water supply pipe 22 and an infusion pipe 23 for transmitting soap foam are installed, the water supply pipe 22 is connected with the municipal water supply pipe 22, the water supply pipe 22 is controlled by a solenoid valve, the infusion pipe 23 is connected with a soap bottle 42 in the hand washing machine, the water supply pipe 22 and the infusion pipe 23 are connected with the same three-way pipe 24, two of the pipe openings of the three-way pipe 24 are respectively connected with the water supply pipe 22 and the infusion pipe 23, the other pipe opening of the three-way pipe 24 is connected with a liquid outlet pipe 26, and the liquid outlet pipe 26 is arranged away from one end of the three-way pipe 24 toward the end of the outer tube 21. The end of the liquid outlet pipe 26 away from the three-way pipe 24 is connected to the pipe joint 25, and the end of the pipe joint 25 away from the three-way pipe 24 is fixedly connected to the threaded pipe 255, and the threaded pipe 255 is connected to the pipe structure by thread to facilitate the circulation of liquid. The threaded pipe 255 is connected to the pipe joint 25, and the threaded pipe 255 is connected to the water outlet head 27 by thread, so that the tap water in the water supply pipe 22 and the foam generated by the foam pump of the infusion pipe 23 can be discharged from the water outlet head 27. An internal interference fit is provided with a mounting plug 28, which is made of a flexible rubber material. The water outlet head 27 is plugged through the mounting plug 28, the water outlet head 27 cooperates with the mounting plug 28, the infrared sensor 29 is plugged and cooperated with the mounting plug 28, the connecting wires of the infrared sensor 29 are passed through the mounting plug 28 and are housed in the outer tube 21, the sensing end of the infrared sensor 29 protrudes outside the mounting plug 28, and the sensing end of the infrared sensor 29 is aligned with the water outlet direction of the water outlet head 27.

[0047] Reference Figures 6 to 9 As shown, in order to facilitate the connection and installation of the pipe joint 25 with the water outlet pipe and the water outlet head 27, it is possible to reduce the situation where the water outlet head 27 is frequently disassembled when the pipe joint 25 of the faucet 2 is damaged. The pipe joint 25 includes a connecting head 251 and a connecting column 254. One end of the connecting support is connected to an insertion head 252 through a spring. The inner diameter of the insertion head 252 is slightly smaller than the outer diameter of the liquid outlet pipe 26. The insertion head 252 is made of a rubber material with strong friction. The end of the liquid outlet pipe 26 away from the three-way pipe 24 is inserted into the insertion head 252 and has an interference fit with the insertion head 252. The end of the connecting head 251 away from the insertion head 252 is integrally connected with a stud tube 253. The stud tube 253 is threadedly connected to the connecting column 254. The threaded tube 255 is integrally connected to the end of the connecting column 254 away from the connecting support. The cross-section of the outer peripheral surface of the connecting head 251 and the connecting column 254 is set in a regular hexagon, so that a wrench can clamp the outer peripheral surface of the connecting head 251 and the connecting column 254 to achieve the mutual connection and separation operation of the two.

[0048] Reference Figures 6 to 9As shown, in order to increase the pressure of the liquid flowing out of the water outlet 27, increase the impact force of the water discharged from the water outlet 27 on the human hand, so as to facilitate the preliminary massage of the human hand and improve the comfort of the human hand. The end of the water outlet 27 away from the pipe joint 25 is closed, and the closed end of the water outlet 27 away from the pipe joint 25 is penetrated by a number of evenly distributed water outlet holes 271, the aperture of the water outlet hole 271 is smaller than the inner diameter of the water outlet 27, and the several water outlet holes 271 are connected to the liquid outlet pipe 26 through the pipe joint 25. When the water pressure remains relatively stable, the solenoid valve is started to discharge the water flowing out of the liquid outlet pipe 26 from the positions of the several water outlet holes 271. According to the Bernoulli principle, due to the reduction of the cross-sectional area of ​​the water outlet position, the flow rate of the water passing through the water outlet holes 271 is increased, and finally the effect of increasing the impact force of the water discharged from the water outlet holes 271 is achieved.

[0049] Reference Figures 6 to 9 As shown, in order to properly install the faucet 2 on the hand washer and realize the step-by-step installation to form the function of the touchless faucet 2, the end away from the water outlet is threadedly matched with an end cap 211, the end cap 211 is arranged in a cylindrical shape, the pipe axis of the outer tube 21 is coaxially arranged with the axis of the end cap 211, the outer diameter of the end cap 211 is larger than the outer diameter of the outer tube 21, and the end surface of the end cap 211 away from the outer tube 21 is provided with a circular groove 212, the outer tube 21 is penetrated to the position of the circular groove 212 of the end cap 211, and the inner wall of the groove of the circular groove 212 is An internal thread is provided, and the internal thread of the end cover 211 is threadedly connected to a mounting block 213. The mounting block 213 is arranged in a cylindrical shape, and a plurality of mounting grooves 214 are penetrated through the end face of the mounting block 213. The mounting grooves 214 are arranged in an arc shape with their openings facing the axis of the mounting block 213. The plurality of mounting grooves 214 are distributed at equal angles around the axis of the mounting block 213. A through groove 215 is penetrated through the end face of the mounting block 213 for the water supply pipe 22, the infusion pipe 23 and the control wire to pass through, and the axis of the through groove 215 is coaxially arranged with the axis of the mounting block 213.

[0050] Partial structure and control circuit components of hand washing machine:

[0051] Reference Figures 10 to 13As shown, in order to realize the control circuit control, the paper dispenser 43, the foam pump, the electromagnetic valve, etc. are controlled to work in an orderly manner through signal transmission, so as to intelligently and orderly discharge the foam soap, tap water and paper towels to complete a series of hand washing operations. The control circuit includes an MCU controller, and a solenoid valve circuit arranged in the solenoid valve, a water supply sensor circuit arranged in the faucet 2, a paper towel sensor circuit arranged in the paper dispenser 43, a soap sensor circuit arranged in the soap bottle 42, a waste water sensor circuit arranged in the wash basin 3, an infrared sensor circuit arranged in the faucet 2, a foam pump circuit arranged in the foam pump, and a paper dispenser circuit arranged in the paper dispenser 43, which are respectively connected to the MCU controller, and a power supply circuit for supplying power to the solenoid valve circuit, the water supply sensor circuit, the paper towel sensor circuit, the soap sensor circuit, the waste water sensor circuit, the infrared sensor circuit, the foam pump circuit and the paper dispenser circuit. Among them, the water supply sensor, paper towel sensor, soap sensor and wastewater sensor are all ultrasonic ranging sensors, which are used to sense the presence of tap water, paper towels, soap and wastewater levels respectively.

[0052] Specifically, by setting a control circuit, the function of intelligent operation of the hand washing machine is realized, and by setting an MCU controller as a central processing unit, it is used to connect the solenoid valve circuit, the water supply sensor circuit, the paper towel sensor circuit, the soap sensor circuit, the waste water sensor circuit, the infrared sensor 29, the foam pump circuit and the paper dispenser circuit, wherein the water supply sensor circuit, the paper towel sensor circuit, the soap sensor circuit, the waste water sensor circuit and the infrared sensor 29 are mainly used to sense external information, and are respectively used to determine whether there is a lack of water, whether there is a lack of paper, whether there is a lack of soap, whether the waste water is full and whether there are hands that need to wash hands, so as to transmit the corresponding sensing signal to the MCU controller, and after the control processing of the MCU controller, the sensing signal is transmitted to the corresponding working output end, for example, the solenoid valve circuit: through the infrared The sensor circuit senses human hands to trigger the electromagnetic valve circuit to open or close the faucet 2 to control the water output; the foam pump sensor circuit: the infrared sensor circuit senses human hands to trigger the foam pump sensor circuit to discharge soap foam. In addition, the soap sensor circuit senses whether there is enough soap in the soap bottle 42. When the soap sensor senses that there is enough soap, the foam pump sensor works normally. When the soap sensor senses that there is insufficient soap, the foam pump stops working; the paper dispenser circuit: after washing hands, the infrared sensor 29 cannot sense human hands, then the sensing signal is transmitted to the MCU controller, and the MCU controller is used to transmit the signal to the paper dispenser 43, thereby triggering the paper dispenser 43 to discharge the paper towel out of the paper outlet 44, so as to facilitate wiping hands after taking out the paper towel.

[0053] Reference Fig.10 and Fig.15As shown, the MCU controller is a control system of the STM32F103C8T6 series single-chip microcomputer using the ARM architecture, which has excellent performance and stability and can ensure that the hand washer can work for a long time. In order to improve the clarity of the hand washing process and facilitate the hand washing operation, the sealed door 45 of the box body 4 is equipped with a lighting lamp with the light source facing the faucet 2, so as to achieve the lighting effect at night. The 18th foot of the MUC controller is connected to the lighting circuit, and the power supply circuit supplies power to the lighting circuit. When the 18th foot of the MCU controller receives a low-level signal, the lighting lamp lights up.

[0054] Reference Fig.10 and Fig.16 As shown, in the process of washing hands, due to the degree of cleanliness of the hands, the amount of foam soap required, the time for rubbing hands, the amount of tap water required for washing hands, and the amount of paper required will all be different, so it is necessary to limit the output of soap foam in the soap bottle 42, the amount of tap water drainage, the time for rubbing hands with soap foam, and the amount of paper output by the paper dispenser. Therefore, the surface of the sealed door 45 of the box body 4 is provided with four adjustment buttons 451 for controlling the working time of the foam pump, the working time of the pause and delay hand washing machine, the water supply time of the solenoid valve, and the time for the paper towel to flow out of the paper dispenser. The surface of the sealed door 45 of the box body 4 away from the inside of the box body 4 is coated with a glass protective layer, and the adjustment button 451 is a touch screen button, and the touch screen button is embedded in the glass protective layer. The four adjustment buttons 451 are respectively connected to pins 15, 16, 17 and 29 of the MCU controller through lines. The ends of the four adjustment buttons 451 away from the MCU controller are respectively connected to key circuits arranged in parallel with each other. The key circuits include interconnected resistors with a resistance value of ten kilo-ohms and capacitors with a capacitance value of 104 farads. The power supply circuit supplies power to the key circuits.

[0055] Reference Fig.10 and Fig.13 As shown, in order to display the time controlled by the adjustment button 451 one by one, the 42nd and 43rd pins of the MCU controller are connected to a digital tube display circuit powered by a power supply circuit, and the digital display screen of the digital display circuit is embedded in the glass protective layer, so that the value displayed by the digital tube is displayed through the glass protective layer, so that people can observe the time when the foam pump produces soap foam, the time of rubbing hands, the time when the hand washer is suspended (washing hands), and the time when the paper dispenser discharges paper towels, so as to convert the corresponding supply amount from the time change.

[0056] In order to keep the data at the last parameter value after power failure, so as to facilitate users to use it in the same way. The MCU controller will save the parameters to the internal storage space of the control system of its STM32F103C8T6 series microcontroller five seconds after the four adjustment buttons 451 are adjusted, so as to achieve the memory storage function, so that users can continue to work after the last work when using it for the second time, thereby reducing the repeated work of the foam pump and the solenoid valve, and achieving the beneficial effect of saving soap and tap water.

[0057] Reference Fig.10 and Fig.17 As shown, in order to facilitate the observation of the working condition of the hand washing machine, it is convenient to troubleshoot the fault of the hand washing machine when the hand washing machine fails. Four process lights 452 are embedded in the glass protective layer outside the sealed door 45 of the box body 4, and the adjustment button 451 is transparent. The outer surface of the sealed door 45 of the box body 4 is provided with four identification marks, and the four identification marks respectively cover the four process lights 452. The four process lights 452 correspond to the prompts of "lack of soap liquid", "lack of water", "lack of paper", and "waste water surface", and the four identification marks are consistent with the characters of the prompt fields corresponding to the four process lights 452. Pins 21, 22, 45, and 46 of the MCU controller are commonly connected to the process light 452 circuit that controls the lighting of the process light 452, and the power supply circuit supplies power to the process light 452 circuit.

[0058] Specifically, when the sensor of the water supply sensor circuit senses water shortage, it transmits a water shortage signal to the MCU controller. After the controller signal is processed, the signal is transmitted to pin 21, pin 22, pin 45, or pin 46 of the MCU controller, thereby triggering one of the processes to light up, so as to prompt the water shortage and facilitate subsequent troubleshooting operations.

[0059] Reference Figures 10 to 12 As shown, in order to ensure stable power supply to each circuit module of the overall control circuit, the power supply circuit includes an internal power supply point furnace and an external power supply circuit that are interconnected. The internal power supply circuit adopts a DC-DC power supply structure. The internal power supply circuit adopts an MP1470 power chip. After switch control, the internal power supply circuit enters the DC-DC synchronous system for power supply. The internal power supply circuit is respectively powered by the MCU controller, the power supply sensor circuit, the paper towel sensor circuit, the soap liquid sensor circuit, the waste water sensor circuit, the infrared sensor circuit, the digital tube display circuit, the process light 452 circuit, the foam pump circuit, the paper feeder circuit and the solenoid valve circuit, which is beneficial to improve the stability of the power supply process, improve the conversion efficiency, and meet the long-term stable operation of the equipment while ensuring the low power consumption of the equipment.

[0060] The external power supply circuit uses the MP1484 power chip, which supplies power to the solenoid valve circuit and the lighting circuit, and is connected to the internal power supply circuit. Since the maximum output power of the MP1484 power chip is 3A, the stable operation of the external equipment is guaranteed. When the infrared sensor circuit receives the trigger signal, the MCU controller system will turn on the external power supply to power the external equipment.

[0061] Steps:

[0062] 1. Turn on the lighting: When the MCU controller's foot receives a low-level signal, the lighting is triggered to light up, thereby illuminating the working environment and facilitating work.

[0063] 2. By clicking four buttons, the foam pump working time, the hand washer pause delay working time, the solenoid valve working time to discharge tap water for washing hands, and the paper dispenser 43 working time to discharge paper towels are controlled respectively, so that the hand washer can work according to the pre-set time during the working process.

[0064] 3. Move the hand to the sensing end of the infrared sensor 29 to trigger the infrared sensor 29 to work, causing the infrared sensor circuit to transmit a trigger signal to the foam pump circuit, so that the foam pump works and produces soap foam that is discharged from the infusion tube 23 through the three-way pipe 24 to the position of the water outlet 27. Since the fluidity of the soap foam is poor, it is difficult to be discharged from the water outlet, thereby causing the soap foam to accumulate at the position of the water outlet 27.

[0065] 4. When the foam pump finishes working, it transmits a signal to the MCU controller, and the MCU controller transmits a trigger signal to the solenoid valve, so that the solenoid valve works for 1 second and opens the water supply pipe 22, so that the water supply pipe 22 discharges a small amount of tap water and pushes the soap foam in the water outlet head 27 out of the water outlet head 27 to the hands, so as to facilitate preliminary hand rubbing.

[0066] 5. After the solenoid valve circuit works for 1 second, the supply completion signal is transmitted to the MCU controller. Through the internal program control of the MCU controller system, the entire equipment is suspended and delayed for a period of time so that the hand washing operation can be performed during this period.

[0067] 6. After the overall pause delay of the hand washer is completed, the MCU controller transmits a trigger signal to the solenoid valve to trigger the solenoid valve to work for the second time and open the water supply pipe 22, so that tap water is discharged from the water supply pipe 22 to the hands for washing.

[0068] 7. After washing hands and rinsing, the solenoid valve controller transmits the work shutdown signal to the MCU controller, and the MCU controller transmits the trigger signal to the paper dispenser 43 circuit. The paper dispenser 43 works to flow a certain amount of paper towels from the paper outlet 44 of the box 4, and finally cuts off the paper towels for the user to wipe his hands after washing.

[0069] 8. After washing and wiping hands, after the internal delay of the MUC controller, the light will be turned off for a longer period of time, and the data will be stored in memory after a delay of five seconds. Then the whole hand washer will enter the standby state and wait for the next trigger.

[0070] The implementation methods of the present invention are not limited to this. According to the above content of the present invention, using common technical knowledge and customary means in the field, without departing from the above basic technical ideas of the present invention, the present invention can also make other various forms of modification, replacement or combination, all of which fall within the scope of protection of the present invention.

Claims

1. A multifunctional hand washing machine based on STM32 chip control, characterized by: It comprises a back plate, the back plate is provided with a faucet controlled by a solenoid valve, an infrared sensor for induction triggering the solenoid valve is provided outside the faucet, the back plate is provided with a box body above the faucet, a soap bottle is provided in the box body, the soap bottle is connected with the faucet through a foam pump, a paper dispenser is provided in the box body, a paper outlet for paper towels to flow out is provided on the lower end surface of the box body, a wash basin is provided on the back plate directly below the faucet, and the box body is provided with control circuits for respectively controlling the paper dispenser, the foam pump, the solenoid valve, and the infrared sensor; The control circuit includes an MCU controller, and a solenoid valve circuit disposed in the solenoid valve, a water supply sensor circuit disposed in the faucet, a paper towel sensor circuit disposed in the paper dispenser, a soap liquid sensor circuit disposed in the soap liquid bottle, a waste water sensor circuit disposed in the wash basin, an infrared sensor circuit disposed in the faucet, a foam pump circuit disposed in the foam pump, and a paper dispenser circuit disposed in the paper dispenser, which are respectively connected to the MCU controller, and a power supply circuit for supplying power to the solenoid valve circuit, the water supply sensor circuit, the paper towel sensor circuit, the soap liquid sensor circuit, the waste water sensor circuit, the infrared sensor circuit, the foam pump circuit, and the paper dispenser circuit; The surface of the box is provided with four adjustment buttons for respectively controlling the working time of the foam pump, controlling the pause and delay working time of the hand washer, controlling the water supply time of the solenoid valve, and controlling the time of the paper towel outflow of the paper dispenser. The four adjustment buttons are respectively connected to the MCU controller through lines, and the ends of the four adjustment buttons away from the MCU controller are respectively connected to the key circuits arranged in parallel with each other, and the power supply circuit supplies power to the key circuits; the MCU controller is connected to a digital tube display circuit powered by the power supply circuit; The faucet comprises an outer tube, a water supply pipe and a liquid infusion pipe connected with the liquid outlet of the foam pump are arranged in the outer tube, the water supply pipe and the liquid infusion pipe are connected with the same three-way pipe, the three-way pipe is connected with the liquid outlet pipe, the three pipe openings of the three-way pipe are respectively connected with the water supply pipe, the liquid infusion pipe and the liquid outlet pipe, the end of the liquid outlet pipe away from the three-way pipe is connected with a pipe joint, the end of the pipe joint away from the liquid outlet pipe is connected with a water outlet, the water outlet is plugged with a mounting plug, the water outlet is provided through the mounting plug, the mounting plug is plugged with the end of the outer tube, the infrared sensor is plugged with the end face of the mounting plug close to the water outlet end of the water outlet, and the infrared sensor controls the opening and closing of the water supply pipe and the liquid infusion pipe; Move your hand to the sensing end of the infrared sensor to trigger the infrared sensor to work, causing the infrared sensor circuit to transmit a trigger signal to the foam pump circuit, causing the foam pump to work and generate soap foam that is discharged from the infusion tube through the three-way pipe to the water outlet. Since the fluidity of the soap foam is poor, it is difficult to be discharged from the water outlet, causing the soap foam to accumulate at the water outlet. When the foam pump finishes working, it transmits a signal to the MCU controller, and the MCU controller transmits a trigger signal to the solenoid valve, so that the solenoid valve works for 1 second and opens the water supply pipe, so that a small amount of tap water is discharged from the water supply pipe and the soap foam in the water outlet head is pushed out from the water outlet head to the hands, so as to facilitate the preliminary hand rubbing; After the solenoid valve circuit works for 1 second, the supply completion signal is transmitted to the MCU controller. Through the internal program control of the MCU controller system, the whole equipment is suspended and delayed for a period of time, so that the hand washing operation can be performed during this period of time. After the overall pause delay of the hand washer is completed, the MCU controller transmits a trigger signal to the solenoid valve to trigger the solenoid valve to work for the second time and open the water supply pipe, so that tap water is discharged from the water supply pipe to the hands for washing; After washing hands and rinsing, the solenoid valve controller transmits the work shutdown signal to the MCU controller, and the MCU controller transmits the trigger signal to the paper dispenser circuit. The paper dispenser works to flow a certain amount of paper towels from the paper outlet of the box, and finally cuts off the paper towels for users to wipe their hands after washing.

2. The multifunctional hand washer based on STM32 chip control according to claim 1 is characterized in that: The box is provided with a lighting lamp with the light source facing the faucet, and the MCU controller is connected to a lighting lamp circuit arranged in the lighting lamp. When the 18th pin of the MCU controller receives a low-level signal, the lighting lamp lights up, and the power supply circuit supplies power to the lighting lamp circuit.

3. The multifunctional hand washer based on STM32 chip control according to claim 1 is characterized in that: The MCU controller will save the parameters to the internal storage space of its single chip microcomputer five seconds after the four adjustment button times are adjusted.

4. The multifunctional hand washer based on STM32 chip control according to claim 1 is characterized in that: Four process lights are arranged on the outer surface of the box body, an identification mark is arranged on the outer surface of the box body on one side of the process lights, the MCU controller is connected to a process light circuit for controlling the lighting of the process lights, and the power supply circuit supplies power to the process light circuit.

5. The multifunctional hand washer based on STM32 chip control according to claim 1 is characterized in that: The power supply circuit includes an internal power supply circuit and an external power supply circuit connected to each other, and both the internal power supply circuit and the external power supply circuit are connected to the MCU circuit; The internal power supply circuit adopts a DC-DC power supply framework. After being controlled by a switch, the internal power supply circuit enters the DC-DC synchronous system to supply power to the MCU controller, solenoid valve circuit, water supply sensor circuit, paper towel sensor circuit, soap sensor circuit, waste water sensor circuit, infrared sensor circuit, foam pump circuit, and paper dispenser circuit of the control circuit. The internal power supply circuit adopts an MP1470 power chip.

6. The multifunctional hand washer based on STM32 chip control according to claim 5 is characterized in that: After the infrared sensor receives the trigger signal, the MCU circuit turns on the external power supply circuit to supply power to the solenoid valve circuit and the lighting circuit. The external power supply circuit uses the MP1484 power chip, and the maximum output power of the MP1484 power chip is 3A.

7. The multifunctional hand washer based on STM32 chip control according to claim 1 is characterized in that: The MCU controller is a control system of the STM32 series single-chip microcomputer using the ARM architecture.

8. The multifunctional hand washer based on STM32 chip control according to claim 1 is characterized in that: The back panel is provided with a plurality of connection grooves, a bending plate is arranged inside the box, two bending surfaces of the bending plate are arranged perpendicular to each other, one bending surface of the bending plate is cut and punched to form a plurality of hooks, the plurality of hooks are embedded and protruded outside the box, the hook mouths of the hooks are arranged downward, and the plurality of hooks are respectively hooked with the plurality of connection grooves.

9. The multifunctional hand washer based on STM32 chip control according to claim 1 is characterized in that: A placement rack is arranged in the box body, the placement rack is arranged in a "concave" shape, the "concave"-shaped opening of the placement rack is arranged upward, the soap liquid bottle is arranged in the "concave"-shaped opening of the placement rack, and the soap liquid bottle is connected to the faucet through a foam pump.

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