An inductive medical automatic liquid taking device

Abstract

An inductive medical automatic liquid taking device, comprising an induction module, a sterilization module and a liquid supply assembly, characterized in that the induction module comprises an infrared proximity sensor, a signal processing unit, a microcontroller, an asynchronous transceiver and a blue LED indicator, the signal processing unit is internally provided with an operational amplifier, an RC filter circuit and a voltage comparator, the microcontroller is provided with two communication interfaces and a mode storage chip, the sterilization module comprises an ultraviolet lamp and a protective shell, the ultraviolet lamp is in the shape of a spiral, the protective shell is made of fluorosilane modified nano-structured transparent glass material, the drive module comprises a forward and reverse double-step motor and a screw rod, the transmission liquid taking assembly comprises a hydraulic pump valve and a liquid taking unit, the power supply module comprises a built-in rechargeable lithium battery and a charging port, and the liquid supply assembly comprises a liquid supply box, a liquid supply unit and a frame body. The problems of not being able to use the induction module, not being able to use the sterilization module and not being able to use the drive module are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of medical infection control device technology, and in particular to an inductive medical automatic liquid dispenser. Background Technology

[0002] In medical institutions, laboratories, public places and other environments, hand disinfection is a key step in preventing cross-infection. The working principle of the induction automatic liquid dispenser is to detect the approach signal of the hand by the built-in infrared sensor, triggering the electric device to squeeze out the hand sanitizer. It can automatically dispense hand sanitizer without contact. Due to its automatic, quantitative and non-contact characteristics, it is widely used in places with high hygiene protection requirements such as medical institutions and laboratories, public places such as schools, hotels, office buildings and homes. However, existing inductive medical automatic liquid dispensers cannot utilize a sensing module to amplify the captured weak electrical signals through operational amplifiers, filter out interference through RC filters, or compare the signals with thresholds using voltage comparators. They cannot accurately determine the detected item and trigger the liquid dispensing action. They cannot achieve synchronization between devices using only preset data formats and transmission rates. They cannot utilize a sterilization module to promptly perform 360° ultraviolet sterilization on the liquid outlet and the bottom of the dispensing chamber, areas prone to bacterial growth, after dispensing. They cannot effectively improve the hydrophobic properties of the liquid outlet, the penetration of ultraviolet light, or the resistance to ultraviolet aging. They cannot utilize a drive module to combine the precise control and flexible response of stepper motors with the efficient transmission and reliable positioning of lead screws. They cannot meet the high-precision requirements of quantitative liquid dispensing while also ensuring the device's safety, stability, and low power consumption. Furthermore, they cannot ensure consistent displacement accuracy between forward dispensing and backward clearing or resetting.

[0003] Patent No. ZL202010308587.8 discloses an "intelligent liquid dispensing device." This invention includes a control box and a hanging basket. The hanging basket is detachably mounted on the top of the control box. A gravity sensor switch is installed on the upper surface of the control box inside the hanging basket. A support plate is located on the rear side of the hanging basket. The top of the support plate is connected to a pressure plate via a pivot. A pressing part is located at the bottom of the pressure plate. The control box contains a PCB board with LED patches and a miniature horn alarm. A pyroelectric infrared human body detection sensor and a horn output hole for the alarm are located on the front side of the control box. LED light strips are located on both sides of the sensor head. A battery compartment is located at the bottom of the control box. This invention features a high degree of automation, using human body sensing for automatic alerts, eliminating safety hazards. The device allows for contactless dispensing of liquid from the disinfection bottle nozzle with an arm, avoiding cross-infection. The device allows for setting the sensing distance and alarm volume according to the usage occasion and environment, facilitating operation. Usage information can be viewed via a mobile app.

[0004] Patent No. ZL202410753500.6 discloses a "medical handwashing and disinfection device with liquid time-limited management function." This invention includes a handwashing and disinfection device body and a management terminal. The handwashing and disinfection device body includes a control component with a square structure and L-shaped slots on both sides of the control component. A hand sanitizer container and a disinfectant container are respectively connected to the two L-shaped slots. A connecting plate is connected below the control component and the L-shaped slots, and a storage box assembly is provided on the bottom front of the connecting plate. The management terminal includes a liquid time-limited management interface, a hand sanitizer usage management interface, a disinfectant usage management interface, and a periodic self-check interface. This invention avoids the problem of using expired disinfectant and can automatically remind users of expiration dates and monitor the temperature, pH, and concentration of the disinfectant in real time, ensuring disinfection effectiveness and safety. Simultaneously, this device also enables remote management and self-checking functions, facilitating use by medical personnel and reducing their workload. Summary of the Invention

[0005] In view of this, the present invention provides an inductive medical automatic liquid dispenser to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial alternative.

[0006] The technical solution of this utility model is implemented as follows: The aforementioned inductive medical automatic liquid dispenser includes a sensing module, a sterilization module, and a liquid supply assembly, characterized in that... The sensing module includes an infrared proximity sensor, a signal processing unit, a microcontroller, an asynchronous transceiver, and a blue LED indicator. The signal processing unit has a built-in operational amplifier to amplify the weak raw signal output by the infrared proximity sensor, preventing signal attenuation and missed detections. The signal processing unit also has a built-in RC filter circuit to filter out environmental electromagnetic interference and eliminate noise-induced false triggering. Furthermore, the signal processing unit has a built-in voltage comparator to compare the amplified signal with a preset threshold and output a stable and valid detection signal. The microcontroller has two communication interfaces and a mode storage chip. The sterilization module includes an ultraviolet lamp and a protective shell. The protective shell is configured as a circular ring structure, and the ultraviolet lamp is configured as a spiral shape. The ultraviolet lamp is installed in the annular inner cavity of the protective shell through a lamp holder. The protective shell is made of fluorosilane-modified nanostructured transparent glass. The liquid supply assembly includes a liquid supply box, a liquid supply unit, and a frame. The liquid supply box includes a box body and a cover. A liquid supply port is provided at the center of the top of the box body. A connection port is provided at the center of the lower end of the cover body via a fixing member. Through holes I are symmetrically provided at the middle positions of the connection port and the front and rear of the cover body. The liquid supply unit includes a silicone plug, a piston I, and a fixing frame. The silicone plug has an insertion channel and a through hole II. The frame includes a front shell, a rear shell, a tray, and a waste liquid box. The inner diameter of the liquid supply port matches the outer diameter of the upper end of the silicone plug. The front shell is engaged with the rear shell via a matching fixing member.

[0007] It also includes a drive module, which includes a stepper motor and a lead screw. The base of the stepper motor is fixed to a preset position on the front end face of the rear shell of the main body by a fixing component. The rotation axis of the stepper motor is set as the lead screw shaft of the lead screw. The stepper motor is set to a two-way forward and reverse rotation mode.

[0008] It also includes a transmission liquid extraction assembly, which includes a hydraulic pump valve and a liquid extraction unit. The hydraulic pump valve includes a liquid outlet channel, a front cover, a pump body, a pump valve silicone plug, a push rod, and a rear cover. The liquid extraction unit includes a liquid extraction chamber, a sealing ring, piston II, a piston spring, and a liquid outlet. The direction of the liquid outlet channel is set to vertically downward, the direction of the pump body is set to horizontal, the transmission direction of the pump body and the lead screw is set to be axially aligned in the horizontal direction, the upper end of the liquid outlet channel is connected to the pump body through the front cover, the liquid outlet channel, the front cover and the pump body are set as an integral molded structure, and the liquid outlet channel, the front cover and the pump body are all set as hollow structures; The shape of the lower end of the silicone plug matches the shape of the outer surface of the pump body. A liquid supply port and an air inlet are provided at a preset position above the pump body from front to back. The diameter of the liquid supply port is smaller than the diameter of the through hole II. The liquid supply port is connected to the through hole II. The air inlet is sealed and connected to an air inlet pipe through an insertion channel. The air inlet pipe is vertically arranged in the box body. A hydrophobic filter membrane is sealed and connected to the lower end of the air inlet pipe. The front end of the push rod is provided with a grooved pad, the grooved part of the grooved pad is set as a ventilation space, and the front end of the grooved pad is provided with a pump valve silicone plug. During the stroke of the push rod, the liquid supply port is always outside the ventilation space, and the air inlet is always inside the ventilation space. The push rod is set as a hollow structure, the inner diameter of the push rod is larger than the outer diameter of the lead screw shaft, and the rear end of the push rod is fixedly connected to the nut of the lead screw. The rear cover is fitted onto the rear end of the sleeve. The inner walls of the rear cover and the sleeve are provided with a predetermined number of limiting grooves in a horizontally ordered manner. The rear cover, the sleeve, and the limiting grooves are integrally formed. The outer wall of the push rod is provided with a predetermined number of limiting protrusions in a horizontally ordered manner. The push rod and the limiting protrusions are integrally formed. The number and shape of the limiting grooves and the limiting protrusions are matched. The push rod is slidably fitted into the rear cover and the sleeve through the limiting grooves and the limiting protrusions. The pump body is fitted into the liquid supply box and the connection port through the through hole I. The front cover and the through hole I at the front end of the cover body are engaged by matching limiting parts. The rear cover is threadedly connected to the rear end of the pump body. The outer diameter of the pump body is equal to the diameter of the through hole I. The liquid collection unit is located inside the liquid outlet channel. A sealing ring is provided at the upper end of the liquid collection chamber. The piston cap of piston II is a frustum-shaped structure that is narrow at the top and wide at the bottom. The diameter of the lower end of the piston cap of piston II matches the inner diameter of the sealing ring. The diameter of the piston II support column is larger than the inner diameter of the sealing ring. The diameter of the piston II support column is smaller than the inner diameter of the liquid collection chamber. The piston II support column is slidably sleeved inside the liquid collection chamber. The liquid outlet is located at the lower end of the liquid collection chamber. The liquid outlet is a hollow cylindrical structure. The upper wall of the liquid outlet is fixedly connected to the lower end of the piston spring. The upper end of the piston spring is fixedly connected to the support column of piston II. The piston spring is made of spring steel. The liquid collection chamber, sealing ring and liquid outlet are integrally formed. The lower port of the liquid outlet is lower than the lower port of the liquid outlet channel.

[0009] A sensing area is provided at the middle of the lower end of the front shell of the main body. The infrared proximity sensor is located in the sensing area. A transparent waterproof protective cover is provided at the front end of the sensing area. The emission direction of the light signal output terminal of the infrared proximity sensor is set to face forward and downward. A through hole III is provided at the upper end of the sensing area. The blue LED indicator is fixed in the through hole III by a fixing component. The blue LED indicator is connected to the microcontroller by a wire. The two communication interfaces are connected to the sterilization module and the sensing module by an asynchronous transceiver and a wire, respectively. The mode storage chip achieves the purpose of quantitative liquid extraction and 3-second sterilization after liquid extraction through a pre-stored control program.

[0010] The outer diameter of the protective shell matches the inner diameter of the liquid outlet, the height of the protective shell is equal to the height of the liquid outlet, and the protective shell is fixedly installed on the inner wall of the liquid outlet.

[0011] A transparent observation area is radially provided on the front side of the box, and a liquid filling port is provided at the bottom of the box, with a sealing cap threadedly connected to the liquid filling port; The fixing frame is configured as a hollow cylindrical structure. The fixing frame is fixedly installed in the through hole II. The outer diameter of the fixing frame is equal to the diameter of the through hole II. The piston cap of the piston I is configured as a frustum-shaped structure that is wider at the top and narrower at the bottom. The diameter of the upper end of the piston cap of the piston I matches the diameter of the through hole II. The diameter of the support column of the piston I is larger than the diameter of the through hole II. The support column of the piston I is slidably sleeved in the through hole II. The outer diameter of the upper end of the silicone plug matches the inner diameter of the connection port. The box body is snapped to the cover body by the silicone plug and matching fasteners. The left and right sides and the lower side of the front shell of the main body are provided with clips. The shape of the clips matches the shape of the lower side of the inverted liquid supply box. The inverted liquid supply box is snapped onto the frame by the clips. A through hole IV is opened at a preset position on the front shell of the main body. The center of the through hole IV is set in the transmission direction of the lead screw. The diameter of the through hole IV matches the outer diameter of the lead screw nut. The lower ends of the front shell and the rear shell of the main body are snapped to the tray by fixing parts. The waste liquid box is snapped into the tray by fasteners. The rear side of the rear shell of the main body is snapped to the back plate by matching fasteners. Threaded holes are opened at the four corners of the back plate.

[0012] It also includes a power supply module, which includes a lithium battery and a charging port, wherein the lithium battery is configured as a built-in rechargeable structure; The output terminal of the lithium battery is connected to an infrared proximity sensor, a signal processing unit, a microcontroller, an asynchronous transceiver, a blue LED indicator, an ultraviolet lamp, and a stepper motor via wires.

[0013] A signal processing unit, a microcontroller, an asynchronous transceiver, and a lithium battery are installed at a preset position on the upper end of the stepper motor. The signal processing unit and the microcontroller are respectively installed on the left front side of the rear shell of the main body by fixing components. The asynchronous transceiver is fixedly installed on the right front side of the rear shell of the main body by fixing components. The lithium battery is fixedly installed on the right front side of the rear shell of the main body by fixing components and a battery box. A charging port and a master control switch are longitudinally opened at a preset position on the right side of the rear shell of the main body.

[0014] The beneficial effects of this utility model are: This invention incorporates a sensing module, along with a corresponding microcontroller and a front casing. It amplifies the captured weak electrical signal using an operational amplifier, filters out interference using an RC filter circuit, and compares the signal with a threshold using a voltage comparator. This accurately determines whether an object has been detected and triggers the liquid extraction action. The invention achieves synchronization between devices using only a preset data format and transmission rate, effectively solving the problem that without a sensing module, the captured weak electrical signal cannot be amplified by an operational amplifier, filtered by an RC filter circuit, and compared with a threshold using a voltage comparator, thus failing to accurately determine whether an object has been detected and trigger the liquid extraction action, and thus failing to achieve synchronization between devices using only a preset data format and transmission rate.

[0015] This invention incorporates a sterilization module, along with a corresponding microcontroller and liquid outlet. It enables 360° ultraviolet sterilization of the liquid outlet and the bottom of the liquid collection chamber, areas prone to bacterial growth, after liquid collection. This effectively improves the hydrophobic properties, ultraviolet penetration, and UV aging resistance of the liquid outlet. It effectively solves the problems associated with not using a sterilization module, which prevents timely 360° ultraviolet sterilization of the liquid outlet and the bottom of the liquid collection chamber after collection, and thus fails to effectively improve the hydrophobic properties, ultraviolet penetration, and UV aging resistance of the liquid outlet.

[0016] This invention incorporates a drive module, along with a corresponding microcontroller and a rear housing, enabling the precise controllability and flexible response of a stepper motor to be combined with the efficient transmission and reliable positioning of a lead screw. This satisfies the high-precision requirements for quantitative liquid dispensing while also ensuring the device's safety, stability, and low power consumption. It guarantees consistent displacement accuracy during forward liquid dispensing and backward liquid removal or reset. This effectively solves the problem that without a drive module, it is impossible to combine the precise controllability and flexible response of a stepper motor with the efficient transmission and reliable positioning of a lead screw, thus failing to meet the high-precision requirements for quantitative liquid dispensing while maintaining the device's safety, stability, and low power consumption, and failing to ensure consistent displacement accuracy during forward liquid dispensing and backward liquid removal or reset. Attached Figure Description

[0017] Appendix Figure 1 This is a schematic diagram of the structure of this utility model; Appendix Figure 2 This is a cross-sectional view of the drive module and the transmission liquid-collecting assembly of this utility model; Appendix Figure 3 This is a schematic diagram of the structure of the cover and hydraulic pump valve of this utility model; Appendix Figure 4 This is a front view structural diagram of the rear shell of this utility model; Appendix Figure 5This is a schematic diagram of the structure of the silicone stopper of this utility model.

[0018] Legend: 1. Sensing module, 2. Sterilization module, 3. Liquid supply assembly, 4. Infrared proximity sensor, 5. Signal processing unit, 6. Microcontroller, 7. Asynchronous transceiver, 8. Blue LED indicator, 9. Communication interface, 10. Pattern storage chip, 11. Ultraviolet lamp, 12. Protective housing, 13. Liquid supply box, 14. Liquid supply unit, 15. Frame, 16. Box body, 17. Cover, 18. Liquid supply port, 19. Connection port, 20. Through hole I, 21. Silicone plug, 22. Piston I, 23. Fixing bracket, 24. Insertion channel, 25. Through hole II, 26. Front shell of main body, 27. Rear shell of main body, 28. Tray, 29. Waste liquid box, 30. Drive module, 31. Stepper motor, 32. Lead screw, 33. Transmission liquid dispensing assembly Components, 34. Hydraulic pump valve, 35. Liquid intake unit, 36. Liquid outlet channel, 37. Front cover, 38. Pump body, 39. Pump valve silicone plug, 40. Push rod, 41. Rear cover, 42. Liquid intake chamber, 43. Sealing ring, 44. Piston II, 45. Piston spring, 46. Liquid outlet, 47. Liquid supply port, 48. Air inlet, 49. Air inlet pipe, 50. Hydrophobic membrane filter, 51. Groove pad, 52. Sleeve, 53. Limiting groove, 54. Limiting protrusion, 55. Sensing area, 56. Transparent waterproof protective cover, 57. Through hole III, 58. Transparent observation area, 59. Liquid filling port, 60. Sealing cover, 61. Card holder, 62. Through hole IV, 63. Back plate, 64. Power supply module, 65. Lithium battery, 66. Charging port, 67. Master control switch. Detailed Implementation

[0019] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The present invention will be further described in detail with reference to the embodiments, so that the public can better understand the implementation method of the present invention. The specific implementation method of the present invention is as follows: The aforementioned inductive medical automatic liquid dispenser includes an induction module 1, a sterilization module 2, and a liquid supply assembly 3, characterized in that... The sensing module 1 includes an infrared proximity sensor 4, a signal processing unit 5, a microcontroller 6, an asynchronous transceiver 7, and a blue LED indicator 8. The signal processing unit 5 has a built-in operational amplifier, which amplifies the weak raw signal output by the infrared proximity sensor 4 to prevent signal attenuation and missed detection. The signal processing unit 5 also has a built-in RC filter circuit to filter out environmental electromagnetic interference and eliminate noise-induced false triggering. The signal processing unit 5 also has a built-in voltage comparator to compare the amplified signal with a preset threshold and output a stable and effective detection signal. The microcontroller has two communication interfaces 9 and a mode storage chip 10. The sterilization module 2 includes an ultraviolet lamp tube 11 and a protective shell 12. The protective shell 12 is configured as a circular structure, and the ultraviolet lamp tube 11 is configured as a spiral shape. The ultraviolet lamp tube 11 is set in the annular inner cavity of the protective shell 12 by a lamp holder. The protective shell 12 is made of a transparent glass material with a nanostructure modified by fluorosilane. The liquid supply assembly 3 includes a liquid supply box 13, a liquid supply unit 14, and a frame 15. The liquid supply box 13 includes a box body 16 and a cover 17. A liquid supply port 18 is provided at the center of the top of the box body 16. A connection port 19 is provided at the center of the lower end of the cover 17 through a fixing member. Through holes I 20 are symmetrically opened at the middle positions of the front and rear of the connection port 19 and the cover 17. The liquid supply unit 14 includes a silicone plug 21, a piston I 22, and a fixing frame 23. The silicone plug 21 has an insertion channel 24 and a through hole II 25. The frame 15 includes a front shell 26, a rear shell 27, a tray 28, and a waste liquid box 29. The inner diameter of the liquid supply port 18 matches the outer diameter of the upper end of the silicone plug 21. The front shell 26 is engaged with the rear shell 27 through matching fixing members.

[0020] It also includes a drive module 30, which includes a stepper motor 31 and a lead screw 32. The base of the stepper motor 31 is fixed to a preset position on the front end face of the rear shell 27 of the main body by a fixing member. The rotation axis of the stepper motor 31 is set as the lead screw shaft of the lead screw 32. The stepper motor 31 is set to a two-way forward and reverse rotation mode.

[0021] It also includes a transmission liquid extraction assembly 33, which includes a hydraulic pump valve 34 and a liquid extraction unit 35. The hydraulic pump valve 34 includes a liquid outlet channel 36, a front cover 37, a pump body 38, a pump valve silicone plug 39, a push rod 40, and a rear cover 41. The liquid extraction unit 35 includes a liquid extraction chamber 42, a sealing ring 43, a piston II 44, a piston spring 45, and a liquid outlet 46. The direction of the liquid outlet channel 36 is set to vertically downward, the direction of the pump body 38 is set to horizontal, the transmission direction of the pump body 38 and the lead screw 32 is set to be axially aligned in the horizontal direction, the upper end of the liquid outlet channel 36 is connected to the pump body 38 through the front cover 37, the liquid outlet channel 36, the front cover 37 and the pump body 38 are set as an integral molded structure, and the liquid outlet channel 36, the front cover 37 and the pump body 38 are all set as hollow structures; The shape of the lower end of the silicone plug 21 matches the shape of the outer surface of the pump body 38. A liquid supply port 47 and an air inlet 48 are provided at a preset position above the pump body 38 from front to back. The diameter of the liquid supply port 47 is smaller than the diameter of the through hole II 25. The liquid supply port 47 is connected to the through hole II 25. The air inlet 48 is sealed and connected to an air inlet pipe 49 through an insertion channel 24. The air inlet pipe 49 is vertically arranged inside the box 16. A hydrophobic filter membrane 50 is sealed and connected to the lower end of the air inlet pipe 49. The push rod 40 has a grooved pad 51 at its front end. The grooved part of the grooved pad 51 is set as a ventilation space. A pump valve silicone plug 39 is set at the front end of the grooved pad 51. During the stroke of the push rod 40, the liquid supply port 47 is always outside the ventilation space, and the air inlet 48 is always inside the ventilation space. The push rod 40 is set as a hollow structure. The inner diameter of the push rod 40 is larger than the outer diameter of the lead screw shaft. The rear end of the push rod 40 is fixedly connected to the nut of the lead screw 32. The rear cover 41 is sleeved on the rear end of the sleeve 52. The inner walls of the rear cover 41 and the sleeve 52 are arranged with a predetermined number of limiting grooves 53 in a horizontal order. The rear cover 41, the sleeve 52 and the limiting grooves 53 are integrated into a single structure. The outer wall of the push rod 40 is arranged with a predetermined number of limiting protrusions 54 in a horizontal order. The push rod 40 and the limiting protrusions 54 are integrated into a single structure. The number and shape of the limiting grooves 53 and the limiting protrusions 54 are matched. The push rod 40 is slidably sleeved in the rear cover 41 and the sleeve 52 through the limiting grooves 53 and the limiting protrusions 54. The pump body 38 is sleeved in the liquid supply box 13 and the connection port 19 through the through hole I20. The front cover 37 is engaged with the through hole I20 at the front end of the cover body 17 through a matching limiting member. The rear cover 41 is threadedly connected to the rear end of the pump body 38. The outer diameter of the pump body 38 is equal to the diameter of the through hole I20. The liquid collection unit 35 is disposed inside the liquid outlet channel 36. A sealing ring 43 is provided at the upper end of the liquid collection chamber 42. The piston cap of the piston II 44 is configured as a frustum-shaped structure that is narrow at the top and wide at the bottom. The diameter of the lower end of the piston cap of the piston II 44 matches the inner diameter of the sealing ring 43. The diameter of the support column of the piston II 44 is larger than the inner diameter of the sealing ring 43. The diameter of the support column of the piston II 44 is smaller than the inner diameter of the liquid collection chamber 42. The support column of the piston II 44 is slidably sleeved inside the liquid collection chamber 42. The liquid outlet 46 is located at the lower end of the liquid collection chamber 42. The liquid outlet 46 is a hollow cylindrical structure. The upper wall of the liquid outlet 46 is fixedly connected to the lower end of the piston spring 45. The upper end of the piston spring 45 is fixedly connected to the support column of the piston II 44. The piston spring 45 is made of spring steel. The liquid collection chamber 42, the sealing ring 43 and the liquid outlet 46 are integrally formed. The lower port of the liquid outlet 46 is lower than the lower port of the liquid outlet channel 36.

[0022] A sensing area 55 is provided at the middle of the lower end of the front shell 26 of the main body. The infrared proximity sensor 4 is located in the sensing area 55. A transparent waterproof protective cover 56 is provided at the front end of the sensing area 55. The emission direction of the light signal output end of the infrared proximity sensor 4 is set to face forward and downward. A through hole Ⅲ 57 is provided at the upper end of the sensing area 55. The blue LED indicator 8 is fixed in the through hole Ⅲ 57 by a fixing component. The blue LED indicator 8 is connected to the microcontroller 6 by a wire. The two communication interfaces 9 are connected to the sterilization module 2 and the sensing module 1 by an asynchronous transceiver 7 and a wire, respectively. The mode storage chip 10 achieves the purpose of quantitative liquid extraction and 3-second sterilization after liquid extraction through a pre-stored control program. The signal processing unit 5 can optimize and intelligently judge the signal, accurately determine the detected item and trigger the liquid extraction action. The asynchronous transceiver 7 realizes that the devices only need to preset data format and transmission rate to achieve synchronization, further ensuring the sterility and convenience of liquid extraction operation.

[0023] The outer diameter of the protective shell 12 matches the inner diameter of the liquid outlet 46, and the height of the protective shell 12 is equal to the height of the liquid outlet 46. The protective shell 12 is fixedly installed on the inner wall of the liquid outlet 46. The spiral ultraviolet lamp tube 11 can perform 360° ultraviolet sterilization on the liquid outlet and the bottom of the liquid collection chamber 42, which are prone to bacterial growth, in a timely manner. This increases the length of the lamp tube and the space utilization rate, achieving a compact layout. The protective shell 12 is made of fluorosilane-modified nanostructured transparent glass material, which effectively improves the hydrophobicity of the liquid outlet, the penetration performance of ultraviolet light, and the resistance to ultraviolet aging.

[0024] A transparent observation area 58 is radially provided on the front side of the box body 16, and a liquid filling port 59 is provided at the bottom of the box body 16. A sealing cap 60 is threadedly connected to the liquid filling port 59. The fixing frame 23 is configured as a hollow cylindrical structure. The fixing frame 23 is fixedly installed in the through hole II 25. The outer diameter of the fixing frame 23 is equal to the diameter of the through hole II 25. The piston cap of the piston I 22 is configured as a frustum-shaped structure that is wider at the top and narrower at the bottom. The diameter of the upper end of the piston cap of the piston I 22 matches the diameter of the through hole II 25. The diameter of the support column of the piston I 22 is larger than the diameter of the through hole II 25. The support column of the piston I 22 is slidably sleeved in the through hole II 25. The outer diameter of the upper end of the silicone plug 21 matches the inner diameter of the connection port 19. The box body 16 is snapped onto the cover body 17 by the silicone plug 21 and the matching fastener. The left, right and lower sides of the front side of the main body 26 are provided with clips 61. The shape of the clips 61 matches the shape of the lower side of the inverted liquid supply box 13. The inverted liquid supply box 13 is snapped onto the frame 15 by the clips 61. A through hole is opened at a preset position on the main body 26. IV62, the center of the through hole IV62 is set in the transmission direction of the lead screw 32, the diameter of the through hole IV62 matches the outer diameter of the nut of the lead screw 32, the lower ends of the front shell 26 and the rear shell 27 of the main body are snapped to the tray 28 by a fastener, the waste liquid box 29 is snapped into the tray 28 by a snap fastener, the rear side of the rear shell 27 of the main body is snapped to the back plate 63 by a matching snap fastener, and threaded holes are opened at the four corners of the back plate 63.

[0025] It also includes a power supply module 64, which includes a lithium battery 65 and a charging port 66, wherein the lithium battery 65 is configured as a built-in rechargeable structure; The output terminal of the lithium battery 65 is connected to the infrared proximity sensor 4, the signal processing unit 5, the microcontroller 6, the asynchronous transceiver 7, the blue LED indicator 8, the ultraviolet lamp 11, and the stepper motor 31 via wires.

[0026] A signal processing unit 5, a microcontroller 6, an asynchronous transceiver 7, and a lithium battery 65 are provided at a preset position on the upper end of the stepper motor 31. The signal processing unit 5 and the microcontroller 6 are respectively fixed to the left front side of the rear shell 27 by fixing components. The asynchronous transceiver 7 is fixed to the right front side of the rear shell 27 by fixing components. The lithium battery 65 is fixed to the right front side of the rear shell 27 by fixing components and a battery box. A charging port 66 and a master control switch 67 are longitudinally provided at a preset position on the right side of the rear shell 27. Specific Implementation

[0027] The aforementioned inductive medical automatic liquid dispenser was installed at the entrance of a hospital ward. After unpacking, each component and device was inspected for any abnormalities and thoroughly disinfected. Following the installation instructions, each component and device was assembled. At a suitable location outside the ward door, expansion screws were used to fix the back plate 63 to the wall through the threaded holes at the four corners. The rear shell 27 of the main body was then fastened to the back plate 63 using clips. The inverted liquid supply box 13 was inserted into the clip 61 from top to bottom, ensuring that all parts were properly installed. The push rod 40 was passed through the through hole IV 62 and fixed to the nut of the lead screw 40, and screwed into the preset marked position on the lead screw shaft. The front shell 26 of the main body was fastened to the rear shell 27 of the main body using fasteners. The inductive medical automatic liquid dispenser was then installed. Medical staff unscrew the sealing cap 60 and inject hand sanitizer into the supply box 13 through the filling port 59. The hand sanitizer flows downward through the through hole II 25 of the silicone plug 21 into the pump body 38 under its own weight. At this time, the weight of the hand sanitizer is less than the tension of the piston spring 45. The hand sanitizer fills the pump body 38 and is sealed at the upper end of the liquid dispensing chamber 42. When the liquid level is seen to be full in the transparent observation area 58, the filling is stopped. The sealing cap 60 is screwed on to seal the filling port 59. During use, the liquid level of the hand sanitizer in the transparent observation area 58 is observed. When the liquid level is insufficient, the above steps are used to add hand sanitizer to the supply box 13. The main control switch 67 is turned on to check that the lithium battery 65 is fully charged. After the device is debugged and can dispense liquid normally, the inductive medical automatic liquid dispenser enters the working state. After examining the patient in the ward, medical staff approach the device outside the ward door and place their hands below the infusion outlet 46. The device's sensing area is set at 5-15cm. When the hands are within the sensing area 55, the infrared proximity sensor 4 receives the reflected infrared light and converts it into a weak electrical signal. This weak original signal is amplified by the operational amplifier, RC filter circuit, and voltage comparator of the signal processing unit 5, filtering out environmental electromagnetic interference. The amplified signal is compared with a preset threshold, and a stable and valid detection signal is output. This signal is then transmitted to the microcontroller 6 via the asynchronous transceiver 7, indicating that an object has been detected. The microcontroller 6 instructs the blue LED indicator 8 to flash, indicating to the medical staff that the current status is "infusion collection in progress." Simultaneously, the asynchronous transceiver 7 enables data transmission between devices via a preset data format. To achieve synchronization, the microcontroller 6, according to the control program pre-stored in the mode storage chip 10, instructs the stepper motor 31 to rotate forward a preset number of times. The lead screw 32 converts the rotational motion of the stepper motor 31 into linear motion. The nut and push rod 40 of the lead screw 32 move forward, pushing the grooved pad 51 and the pump valve silicone plug 39 forward. The pressure of the liquid in the hydraulic pump valve 34 is greater than the atmospheric pressure and the weight of the liquid itself, causing the piston I 22 to move upward. The piston cap of the piston I 22 closes the through hole II 25. At the same time, the hydraulic power is greater than the tension of the piston spring 45, pushing the piston II 44 downward. The piston cap of the piston II 44 releases the sealing ring 43, and the hand sanitizer drips from the outlet 46 into the hands of medical staff. According to the control program pre-stored in the mode storage chip 10, after the transmission preset displacement, the hand sanitizer drips out a fixed amount of 5ml each time, and the liquid collection process ends. Waste liquid container 29 is used to collect hand sanitizer that may accidentally drip during liquid collection. When a large amount of hand sanitizer is collected in the waste liquid container 29, medical staff release the clip between the waste liquid container 29 and the front end of the tray 28, remove the waste liquid container 29, clean it, and then clip it back into the tray 28. After the stepper motor 31 rotates forward a preset number of revolutions, the microcontroller 6 instructs the stepper motor 31 to rotate in reverse the same number of revolutions. The nut of the transmission screw 32 and the push rod 40 move backward to return to their initial positions. Under the action of the grooved pad 51 and the silicone plug 39 of the pump valve, the pressure of the liquid in the hydraulic pump valve 34 is less than the atmospheric pressure and the weight of the liquid itself. Force causes piston I 22 to move downward, opening through hole II 25 and allowing hand sanitizer to flow down and replenish. At the same time, outside air enters the supply box 13 through air inlet 48, air inlet pipe 49 and hydrophobic membrane filter 50 to balance the pressure inside the box. Meanwhile, the hydraulic force is greater than the tension of piston spring 45, causing piston II 44 to move downward. The piston cap of piston II 44 closes the sealing ring 43, stopping the dripping of hand sanitizer. The hydrophobic membrane filter 50 has selective filtration characteristics, which can prevent liquid from passing through while maintaining unobstructed gas flow. This prevents hand sanitizer from accidentally entering the air inlet pipe 49 during use and causing blockage, and maintains a constant pressure inside the bottle. After the drive module 30 and the transmission liquid dispensing component 33 have completed their work, the microprocessor 6 instructs the ultraviolet lamp 11 to continuously perform 360° ultraviolet sterilization on the hand sanitizer outlet and the bottom of the liquid dispensing chamber 42, which are prone to bacterial growth, for 3 seconds, killing bacteria and viruses on the surface. The protective shell 12 is made of fluorosilane-modified nanostructured transparent glass material, which effectively improves the hydrophobicity of the hand sanitizer outlet, the penetration performance of ultraviolet light, and the aging resistance of ultraviolet light. At this point, the entire liquid dispensing and sterilization process of the device is completed. The lithium battery 65 continuously powers the infrared proximity sensor 4, signal processing unit 5, microcontroller 6, asynchronous transceiver 7, blue LED indicator 8, ultraviolet lamp 11, and stepper motor 31. When the lithium battery 65 is low on power, a dedicated charger is used to charge the lithium battery 65 through the charging port 66. During the transmission and liquid dispensing strokes, the liquid supply port 47 is always outside the ventilation space, and the air inlet 48 is always inside the ventilation space, ensuring smooth liquid dispensing and air intake. The limiting groove 53 and the limiting protrusion 54 interact to limit the push rod 40 to only make linear forward and backward movements.

Claims

1. A sensor-type automatic medical liquid dispenser, comprising a sensing module (1), a sterilization module (2), and a liquid supply assembly (3), characterized in that: The sensing module (1) includes an infrared proximity sensor (4), a signal processing unit (5), a microcontroller (6), an asynchronous transceiver (7), and a blue LED indicator (8). The signal processing unit (5) has an operational amplifier built-in, which amplifies the weak original signal output by the infrared proximity sensor (4) to avoid signal attenuation and missed detection. The signal processing unit (5) has an RC filter circuit built-in, which filters environmental electromagnetic interference and eliminates noise and false triggering. The signal processing unit (5) has a voltage comparator built-in, which compares the amplified signal with a preset threshold and outputs a stable and effective detection signal. The microcontroller (6) is equipped with two communication interfaces (9) and a mode storage chip (10). The sterilization module (2) includes an ultraviolet lamp tube (11) and a protective shell (12). The protective shell (12) is set as a circular structure, and the ultraviolet lamp tube (11) is set as a spiral shape. The ultraviolet lamp tube (11) is set in the annular inner cavity of the protective shell (12) through a lamp holder. The protective shell (12) is made of a transparent glass material with a nanostructure modified by fluorosilane. The liquid supply assembly (3) includes a liquid supply box (13), a liquid supply unit (14), and a frame (15). The liquid supply box (13) includes a box body (16) and a cover (17). A liquid supply port (18) is provided at the center of the top of the box body (16). A connection port (19) is provided at the center of the lower end of the cover (17) through a fastener. Through holes I (20) are symmetrically opened at the middle positions of the front and rear of the connection port (19) and the cover (17). The liquid supply unit... (14) includes a silicone plug (21), piston I (22) and a fixing frame (23). The silicone plug (21) has an insertion channel (24) and a through hole II (25). The frame (15) includes a front shell (26), a rear shell (27), a tray (28) and a waste liquid box (29). The inner diameter of the liquid supply port (18) matches the outer diameter of the upper end of the silicone plug (21). The front shell (26) is engaged with the rear shell (27) by a matching fastener.

2. The inductive medical automatic liquid dispenser as described in claim 1, characterized in that, It also includes a drive module (30), which includes a stepper motor (31) and a lead screw (32). The base of the stepper motor (31) is fixed to a preset position on the front end face of the rear shell (27) of the main body by a fixing member. The rotation shaft of the stepper motor (31) is set as the lead screw shaft of the lead screw (32). The stepper motor (31) is set to a forward and reverse double-stroke mode.

3. The inductive medical automatic liquid dispenser as described in claim 2, characterized in that, It also includes a transmission liquid extraction assembly (33), which includes a hydraulic pump valve (34) and a liquid extraction unit (35). The hydraulic pump valve (34) includes a liquid outlet channel (36), a front cover (37), a pump body (38), a pump valve silicone plug (39), a push rod (40), and a rear cover (41). The liquid extraction unit (35) includes a liquid extraction chamber (42), a sealing ring (43), a piston II (44), a piston spring (45), and a liquid outlet (46). The direction of the liquid outlet channel (36) is set to vertically downward, the direction of the pump body (38) is set to horizontal, the transmission direction of the pump body (38) and the lead screw (32) is set to be axially consistent in the horizontal direction, the upper end of the liquid outlet channel (36) is connected to the pump body (38) through the front cover (37), the liquid outlet channel (36), the front cover (37) and the pump body (38) are set to an integral molded structure, and the liquid outlet channel (36), the front cover (37) and the pump body (38) are all set to a hollow structure; The shape of the lower end of the silicone plug (21) matches the shape of the outer surface of the pump body (38). A liquid supply port (47) and an air inlet (48) are provided from front to back at a preset position above the pump body (38). The diameter of the liquid supply port (47) is smaller than the diameter of the through hole II (25). The liquid supply port (47) is connected to the through hole II (25). The air inlet (48) is sealed and connected to the air inlet pipe (49) through the insertion channel (24). The air inlet pipe (49) is vertically arranged inside the box body (16). The lower end of the air inlet pipe (49) is sealed and connected to the hydrophobic membrane filter (50). The push rod (40) has a grooved pad (51) at its front end. The grooved part of the grooved pad (51) is set as a ventilation space. The front end of the grooved pad (51) is set with a pump valve silicone plug (39). During the stroke of the push rod (40), the liquid supply port (47) is always outside the ventilation space, and the air inlet (48) is always inside the ventilation space. The push rod (40) is set as a hollow structure. The inner diameter of the push rod (40) is larger than the outer diameter of the lead screw shaft. The rear end of the push rod (40) is fixedly connected to the nut of the lead screw (32). The rear cover (41) is fitted onto the rear end of the sleeve (52). A predetermined number of limiting grooves (53) are arranged horizontally and orderly on the inner walls of the rear cover (41) and the sleeve (52). The rear cover (41), the sleeve (52), and the limiting grooves (53) are integrally formed. A predetermined number of limiting protrusions (54) are arranged horizontally and orderly on the outer wall of the push rod (40). The push rod (40) and the limiting protrusions (54) are integrally formed. The number of limiting grooves (53) and limiting protrusions (54) is... The shapes match, the push rod (40) is slidably sleeved in the rear cover (41) and sleeve (52) through the limiting groove (53) and the limiting protrusion (54), the pump body (38) is sleeved in the liquid supply box (13) and the connection port (19) through the through hole I (20), the front cover (37) and the through hole I (20) at the front end of the cover body (17) are engaged by matching limiting parts, the rear cover (41) is threaded to the rear end of the pump body (38), and the outer diameter of the pump body (38) is equal to the diameter of the through hole I (20); The liquid taking unit (35) is located inside the liquid outlet channel (36). The upper end of the liquid taking chamber (42) is provided with a sealing ring (43). The piston cap of the piston II (44) is configured as a frustum-shaped structure that is narrow at the top and wide at the bottom. The diameter of the lower end of the piston cap of the piston II (44) matches the inner diameter of the sealing ring (43). The diameter of the support column of the piston II (44) is greater than the inner diameter of the sealing ring (43). The diameter of the support column of the piston II (44) is smaller than the inner diameter of the liquid taking chamber (42). The support column of the piston II (44) is slidably sleeved in the liquid taking chamber (42). The liquid outlet (46) is located at the lower end of the liquid collection chamber (42). The liquid outlet (46) is a hollow cylindrical structure. The upper wall of the liquid outlet (46) is fixedly connected to the lower end of the piston spring (45). The upper end of the piston spring (45) is fixedly connected to the support column of piston II (44). The piston spring (45) is made of spring steel. The liquid collection chamber (42), the sealing ring (43) and the liquid outlet (46) are integrated into a single structure. The lower port of the liquid outlet (46) is lower than the lower port of the liquid outlet channel (36).

4. The inductive medical automatic liquid dispenser as described in claim 1, characterized in that, A sensing area (55) is provided at the middle of the lower end of the front shell (26) of the main body. The infrared proximity sensor (4) is located in the sensing area (55). A transparent waterproof protective cover (56) is provided at the front end of the sensing area (55). The emission direction of the light signal output end of the infrared proximity sensor (4) is set to face forward and downward. A through hole III (57) is provided at the upper end of the sensing area (55). The blue LED indicator (8) is installed in the through hole III (57) through a fixing piece. The blue LED indicator (8) is connected to the microcontroller (6) through a wire. The two communication interfaces (9) are connected to the sterilization module (2) and the sensing module (1) respectively through an asynchronous transceiver (7) and a wire. The mode storage chip (10) achieves the purpose of quantitative liquid extraction and 3-second sterilization after liquid extraction through the pre-stored control program.

5. The inductive medical automatic liquid dispenser as described in claim 1, characterized in that, The outer diameter of the protective shell (12) matches the inner diameter of the liquid outlet (46), the height of the protective shell (12) is equal to the height of the liquid outlet (46), and the protective shell (12) is fixedly installed on the inner wall of the liquid outlet (46).

6. The inductive medical automatic liquid dispenser as described in claim 1, characterized in that, The front side of the box (16) is provided with a transparent observation area (58), and the bottom of the box (16) is provided with a liquid filling port (59), and the liquid filling port (59) is threaded with a sealing cap (60). The fixing frame (23) is configured as a hollow cylindrical structure. The fixing frame (23) is fixedly installed in the through hole II (25). The outer diameter of the fixing frame (23) is equal to the diameter of the through hole II (25). The piston cap of the piston I (22) is configured as a frustum-shaped structure that is wider at the top and narrower at the bottom. The diameter of the upper end of the piston cap of the piston I (22) matches the diameter of the through hole II (25). The diameter of the support column of the piston I (22) is greater than the diameter of the through hole II (25). The support column of the piston I (22) is slidably sleeved in the through hole II (25). The outer diameter of the upper end of the silicone plug (21) matches the inner diameter of the connection port (19). The box body (16) is snapped into the cover body (17) by the silicone plug (21) and the matching fastener. The left and right sides and the lower side of the front side of the main body (26) are provided with card holders (61). The shape of the card holders (61) matches the shape of the lower side of the inverted liquid supply box (13). The inverted liquid supply box (13) is snapped into the frame (15) by the card holders (61). A through hole is opened at a preset position of the main body (26). Ⅳ (62), the center of the through hole Ⅳ (62) is set in the transmission direction of the lead screw (32), the diameter of the through hole Ⅳ (62) matches the outer diameter of the nut of the lead screw (32), the lower ends of the front shell (26) and the rear shell (27) of the main body are connected to the tray (28) by a fastener, the waste liquid box (29) is fastened in the tray (28) by a buckle, the rear side of the rear shell (27) of the main body is connected to the back plate (63) by a matching buckle, and the back plate (63) has threaded holes at the four corners.

7. The inductive medical automatic liquid dispenser as described in claim 6, characterized in that, It also includes a power supply module (64), which includes a lithium battery (65) and a charging port (66), wherein the lithium battery (65) is configured as a built-in rechargeable structure; The output terminal of the lithium battery (65) is connected to the infrared proximity sensor (4), signal processing unit (5), microcontroller (6), asynchronous transceiver (7), blue LED indicator (8), ultraviolet lamp (11) and stepper motor (31) via wires.

8. A sensor-type automatic medical liquid dispenser as described in claim 2 or 7, characterized in that, A signal processing unit (5), a microcontroller (6), an asynchronous transceiver (7), and a lithium battery (65) are provided at a preset position on the upper end of the stepper motor (31). The signal processing unit (5) and the microcontroller (6) are respectively fixed on the left front side of the rear shell (27) by fasteners. The asynchronous transceiver (7) is fixed on the right front side of the rear shell (27) by fasteners. The lithium battery (65) is fixed on the right front side of the rear shell (27) by fasteners and a battery box. A charging port (66) and a master control switch (67) are longitudinally opened at a preset position on the right side of the rear shell (27).

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