Peristaltic pump type handheld atomization device

Abstract

The invention belongs to the crossing field of precise fluid control and intelligent medical electronic equipment, and relates to a peristaltic pump type handheld atomization device. An atomizer; the controller is electrically connected with the peristaltic pump and the atomizer and used for controlling the infusion action of the peristaltic pump and the atomization action of the atomizer. The controller comprises an MCU control circuit, a piezoelectric ceramic piece driving circuit, a stepping motor driving circuit, a Hall switch circuit, a charging circuit and an LED display circuit, the piezoelectric ceramic piece driving circuit, the stepping motor driving circuit, the Hall switch circuit, the charging circuit and the LED display circuit are electrically connected with the MCU control circuit, and the MCU control circuit is connected with the stepping motor driving circuit through a PWM signal line and used for controlling the rotating speed and the direction of a peristaltic pump roller. The piezoelectric ceramic driving circuit is used for converting electric energy into mechanical vibration to achieve liquid atomization, and the stepping motor driving circuit is used for driving the peristaltic pump to achieve mist diffusion. The atomization amount can be flexibly adjusted according to different requirements, and operations such as accurate dosing or environment humidification are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of precision fluid control and intelligent medical electronic equipment, more particularly to a peristaltic pump type handheld atomization device. BACKGROUND

[0002] The existing atomization device generally adopts self-suction type and permeation type liquid supply, and rarely adopts an 8-bit MCU single-chip microcomputer, and generally adopts a special chip to drive a ceramic atomization sheet. The existing atomization sheet generally adopts an atomization sheet with a frequency of 108K, and the atomization amount is small. SUMMARY

[0003] In view of the above defects of the prior art, the present application provides a peristaltic pump type handheld atomization device, comprising:

[0004] a peristaltic pump;

[0005] an atomizer;

[0006] and a controller electrically connected with the peristaltic pump and the atomizer, respectively, for controlling the infusion action of the peristaltic pump and the atomization action of the atomizer.

[0007] Preferably, the controller comprises:

[0008] an MCU control circuit, a piezoelectric ceramic sheet driving circuit, a stepping motor driving circuit, a Hall switch circuit, a charging circuit and an LED display circuit electrically connected with the MCU control circuit, the MCU control circuit being connected with the stepping motor driving circuit through a PWM signal line for controlling the rotating speed and direction of the peristaltic pump roller, the piezoelectric ceramic driving circuit being used for converting electric energy into mechanical vibration to realize liquid atomization, the stepping motor driving circuit being used for driving the peristaltic pump to realize mist diffusion, the Hall switch circuit being used for controlling the stepping motor through PWM, the charging circuit being used for realizing intelligent charging of the device, and the LED display circuit being used for human-computer interaction to display the working mode, the remaining power and the atomization rate parameters.

[0009] Preferably, the MCU control circuit comprises an MCU U1 provided with single-path 8-bit PWM and multi-path 16-bit PWM output, and outputs a PWM square wave signal, the MCU U1 being used for driving the ceramic sheet and controlling the stepping motor.

[0010] Preferably, the piezoelectric ceramic plate driving circuit includes: pin 2 of atomizing plate 1 is connected to one end of inductor L1, the other end of inductor L1 is connected to pin 3 of inductor U2, pin 1 of inductor U2 is connected to the drain of MOSFET chip U3, the source of MOSFET chip U3 is connected to one end of resistor R2 and grounded, the gate of MOSFET chip U3 is connected to the other end of resistor R2 and one end of resistor R1 respectively, and the other end of resistor R1 is connected to the PWM signal from the MCU control circuit.

[0011] Preferably, the stepper motor drive circuit includes: pin 1 of the dual-channel H-bridge driver chip U4 is connected to the positive terminal of capacitor C5 and one end of capacitor C4 respectively and connected to VBAT; pin 10 of the dual-channel H-bridge driver chip U4 is connected to one end of capacitor C7 and pin 4 of wire-to-board surface mount connector U5 respectively; pin 9 of the dual-channel H-bridge driver chip U4 is connected to the other end of capacitor C7 and pin 2 of wire-to-board surface mount connector U5 respectively; pin 8 of the dual-channel H-bridge driver chip U4 is connected to one end of capacitor C8 and pin 3 of wire-to-board surface mount connector U5 respectively; pin 7 of the dual-channel H-bridge driver chip U4 is connected to the other end of capacitor C8 and pin 1 of wire-to-board surface mount connector U5 respectively; and pin 6 of the dual-channel H-bridge driver chip U4 is grounded.

[0012] Preferably, the Hall effect switch circuit includes: pin 1 of the Hall effect switch chip U6 is connected to one end of the capacitor C6 and connected to VBAT, the other end of the capacitor C6 is grounded, pin 2 of the Hall effect switch chip U6 is connected to one end of the resistor R3 and one end of the capacitor C9 respectively, the other end of the capacitor C9 is connected to pin 3 of the Hall effect switch chip U6, and the other end of the resistor R3 is connected to KEY1.

[0013] Preferably, the charging circuit includes: pin 1 of the charging management chip U7 is connected to pin 3 of the charging management chip U7 and one end of resistor R4 respectively; pin 2 of the charging management chip U7 is connected to the other end of resistor R4; pin 4 of the charging management chip U7 is connected to one end of resistor R6, one end of capacitor C12, one end of capacitor C13, one end of capacitor C14, and pin 8 of the charging management chip U7 respectively; the other end of capacitor C12 is connected to the other ends of capacitor C13 and capacitor C14 respectively and grounded; pin 5 of the charging management chip U7 is connected to one end of capacitor C10 and one end of capacitor C11 respectively; the other end of capacitor C10 is connected to the other end of capacitor C11 and grounded.

[0014] Preferably, the LED display circuit includes: one end of a common anode RGB three-color surface-mount light-emitting diode LED1 is connected to one end of a resistor R5.

[0015] Preferably, the device further includes a USB interface circuit.

[0016] Preferably, the device further includes a serial port programming circuit.

[0017] The peristaltic pump-type handheld atomizer of the present invention has the following beneficial effects:

[0018] (1) The MCU control circuit is the core. It precisely controls the stepper motor drive circuit through the PWM signal line, thereby controlling the speed and direction of the peristaltic pump roller. It can flexibly adjust the atomization amount according to different needs to achieve precise drug delivery or environmental humidification.

[0019] (2) The piezoelectric ceramic plate driving circuit efficiently converts electrical energy into mechanical vibration, making the liquid atomized fine and uniform, improving the atomization effect and enhancing the user experience;

[0020] (3) The Hall switch circuit can directly control the stepper motor through PWM to ensure stable and reliable operation of the device and avoid the atomization quality being affected by abnormal speed;

[0021] (4) The charging circuit realizes intelligent charging, which can automatically identify the charging status, prevent overcharging and over-discharging, extend the battery life, and improve the portability and durability of the device.

[0022] (5) The LED display circuit provides a clear and intuitive human-machine interface, which can display key parameters such as working mode, remaining power, and atomization rate in real time, so that users can keep track of the device's operation at any time and adjust the operation in a timely manner, greatly improving the convenience and safety of use. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort. The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0024] Figure 1 This is a schematic diagram of the controller module in the peristaltic pump-type handheld atomizing device of the present invention;

[0025] Figure 2 This is a circuit diagram of the MCU control circuit in the controller of the peristaltic pump-type handheld atomizing device of the present invention;

[0026] Figure 3 This is a circuit diagram of the piezoelectric ceramic plate drive circuit in the controller of the peristaltic pump type handheld atomizing device of the present invention;

[0027] Figure 4This is a circuit diagram of the stepper motor drive circuit in the controller of the peristaltic pump type handheld atomizing device of the present invention;

[0028] Figure 5 This is a circuit diagram of the Hall switch circuit in the controller of the peristaltic pump-type handheld atomizing device of the present invention;

[0029] Figure 6 This is a circuit diagram of the charging circuit in the controller of the peristaltic pump type handheld atomizing device of the present invention;

[0030] Figure 7 This is a circuit diagram of the LED display circuit in the controller of the peristaltic pump type handheld atomizing device of the present invention;

[0031] Figure 8 This is a circuit diagram of the USB interface circuit in the controller of the peristaltic pump-type handheld atomizing device of the present invention. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0034] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0035] Please see Figure 1 This is a schematic diagram of the controller module in the peristaltic pump-type handheld atomizing device of the present invention. Figure 1As shown, the peristaltic pump type handheld nebulizer provided in the first embodiment of the present invention includes at least a peristaltic pump; a nebulizer; and a controller. The controller is electrically connected to the peristaltic pump and the nebulizer respectively, and is used to control the infusion action of the peristaltic pump and the nebulizer's nebulization action.

[0036] The controller further includes: an MCU control circuit, a piezoelectric ceramic plate drive circuit, a stepper motor drive circuit, a Hall switch circuit, a charging circuit, and an LED display circuit electrically connected to the MCU control circuit. The MCU control circuit is connected to the stepper motor drive circuit via a PWM signal line to control the speed and direction of the peristaltic pump roller. The piezoelectric ceramic drive circuit converts electrical energy into mechanical vibration to achieve liquid atomization. The stepper motor drive circuit drives the peristaltic pump to achieve mist diffusion. The Hall switch circuit monitors the peristaltic pump speed in real time to form a closed-loop control. The charging circuit enables intelligent charging of the device. The LED display circuit is used for human-machine interaction, displaying the working mode, remaining power, and atomization rate parameters.

[0037] Figure 2 This is a circuit diagram of the MCU control circuit in the controller of the peristaltic pump-type handheld atomizing device of the present invention. Figure 2 As shown, the MCU control circuit includes MCU U1. Pin 16 of MCU U1 is connected to one end of capacitor C1 and connected to VBAT. The other end of capacitor C1 is grounded.

[0038] In this peristaltic pump-type handheld atomizer, the MCU U1 serves as the core controller; in this embodiment, it is model HC89F1602A. This is a microcontroller based on the 8051 core, featuring 16KB of flash memory and 512B of RAM, operating at 2.4V to 5.5V, supporting low-power modes, and suitable for portable devices. Its main functions include: generating PWM signals to control the stepper motor drive circuit and the piezoelectric ceramic plate drive circuit; processing feedback signals from the Hall switch circuit to achieve closed-loop control; managing the intelligent charging process of the charging circuit; driving the LED display circuit for human-machine interaction; and coordinating the timing of various sub-circuits. The HC89F1602A integrates various peripherals, such as timers, ADCs, and UARTs, enabling it to efficiently handle real-time control tasks.

[0039] Besides the HC89F1602A, other microcontroller chips can be selected to meet different performance requirements and cost considerations:

[0040] STC89C52RC: Based on the 8051 core, it features 8KB of flash memory and 512B of RAM, offering low cost and suitability for simple control applications. However, its processing speed and peripheral resources are limited, making it suitable for scenarios with low power consumption and performance requirements.

[0041] ATmega328P: An AVR core microcontroller with 32KB flash memory and 2KB RAM, supporting a wide range of PWM outputs and ADC channels, suitable for devices requiring precise control of atomization rate and battery management. It is widely used on the Arduino platform and has abundant development resources.

[0042] The STM32F103C8T6 is based on the ARM Cortex-M3 core, featuring 64KB of flash memory and 20KB of RAM. It boasts high performance, a clock speed of up to 72MHz, and supports multiple communication interfaces (such as SPI, I2C, and UART). It is suitable for atomizing devices requiring complex control algorithms (such as PID control) to achieve more stable atomization effects.

[0043] ESP32: A dual-core processor supporting Wi-Fi and Bluetooth, with 520KB RAM and 4MB flash memory. Suitable for smart atomizing devices, it enables remote control and data monitoring via wireless network, facilitating IoT integration.

[0044] These alternative chips serve a similar purpose to the HC89F1602A, but their performance varies: the STC89C52RC is suitable for low-cost solutions; the ATmega328P balances performance and ease of use; the STM32F103C8T6 is suitable for high-performance requirements; and the ESP32 expands wireless functionality. When choosing a chip, power consumption, peripheral interfaces, development environment, and cost factors must be considered.

[0045] The MCU control circuit, with a microcontroller (such as the HC89F1602A) at its core, is responsible for overall system control. Its working principle is as follows: The MCU runs firmware, reads instructions from its internal memory, and outputs PWM signals through GPIO pins to control other circuits. It processes feedback signals from Hall switches to achieve closed-loop control; monitors the status of the charging circuit; and drives the LED display circuit. The MCU also manages power modes, entering a low-power state when idle to save energy. A clock circuit (such as a crystal oscillator) provides a timing reference to ensure accurate timing.

[0046] Figure 3 This is a circuit diagram of the piezoelectric ceramic plate drive circuit in the controller of the peristaltic pump-type handheld atomizing device of the present invention. Figure 3 As shown, the piezoelectric ceramic plate driving circuit includes: pin 2 of atomizing plate 1 is connected to one end of inductor L1, the other end of inductor L1 is connected to pin 3 of inductor U2, pin 1 of inductor U2 is connected to the drain of MOSFET chip U3, the source of MOSFET chip U3 is connected to one end of resistor R2 and grounded, the gate of MOSFET chip U3 is connected to the other end of resistor R2 and one end of resistor R1 respectively, and the other end of resistor R1 is connected to the PWM signal from the MCU control circuit.

[0047] An inductor L1 was added to the output terminal of the three-pin inductor of MCU U1, which effectively enhanced the driving force and significantly improved the mist output of the small ceramic atomizing plate.

[0048] The working principle of the piezoelectric ceramic chip driver circuit is as follows: The PWM signal generated by the MCU drives the gate of MOSFET U3 through resistor R1, controlling its switching. When U3 is on, current flows through the primary coil (inductor L1) of transformer U2; when U3 is off, a high voltage is induced in the secondary coil of the transformer, driving the piezoelectric ceramic chip to vibrate. The vibration frequency is determined by the PWM frequency, typically from tens to hundreds of kHz, matching the resonant frequency of the piezoelectric ceramic chip to maximize atomization efficiency. The transformer turns ratio determines the output voltage amplitude, as shown in the formula: ,in It is the output voltage.

[0049] It is the input voltage. It is the number of secondary turns. It refers to the number of primary turns.

[0050] Inductor U2 acts as a transformer in the piezoelectric ceramic plate drive circuit. In this embodiment, it is model CD75 30:1500, with a turns ratio of 30:1500 (i.e., 1:50). Its advantages include:

[0051] High-efficiency boost: It can convert low-voltage PWM signals (such as 3.3V or 5V) into high-voltage signals (about 150V to 200V) to meet the working voltage requirements of piezoelectric ceramic sheets and ensure sufficient vibration intensity.

[0052] Impedance matching: Optimizes energy transfer through turns ratio, reduces circuit loss, and improves atomization efficiency.

[0053] Frequency response: Designed for high-frequency operation (typically tens to hundreds of kHz), matching the resonant frequency of the piezoelectric ceramic sheet to achieve stable atomization.

[0054] Compact Design: The CD75 series is a surface-mount inductor with a small size, making it suitable for the miniaturization requirements of handheld devices.

[0055] In addition to CD75 30:1500, the following alternative components can also be used:

[0056] Custom transformers: The turns ratio is designed to meet specific voltage and frequency requirements, such as 20:1000 or 40:2000, to accommodate the electrical parameters of different piezoelectric ceramic sheets. Custom transformers optimize performance and cost, but require additional design work.

[0057] Piezoelectric ceramic driver chips, such as the DRV2667 (manufactured by TI), integrate a boost converter and a high-voltage driver, allowing direct output of drive signals and simplifying circuit design. It supports adjustable frequency (up to 300Hz) and amplitude, making it suitable for precision atomization control.

[0058] High-voltage operational amplifiers are used in conjunction with external transformers, such as LM741 or OPA454, and discrete transformers. However, the circuits are complex and the efficiency is low, making them suitable only for experimental designs.

[0059] These components convert electrical energy into mechanical vibration in the piezoelectric ceramic sensor drive circuit. A transformer uses electromagnetic induction to boost voltage, driving the piezoelectric ceramic sensor to generate high-frequency vibration; while an integrated driver chip provides more stable control and reduces the number of external components. The choice between these components requires a trade-off between boost efficiency, circuit complexity, and cost.

[0060] Figure 4 This is a circuit diagram of the stepper motor drive circuit in the controller of the peristaltic pump-type handheld atomizing device of the present invention. Figure 4 As shown, the stepper motor drive circuit includes: pin 1 of the dual-channel H-bridge driver chip U4 is connected to the positive terminal of capacitor C5 and one end of capacitor C4 respectively and connected to VBAT; pin 10 of the dual-channel H-bridge driver chip U4 is connected to one end of capacitor C7 and pin 4 of wire-to-board surface mount connector U5 respectively; pin 9 of the dual-channel H-bridge driver chip U4 is connected to the other end of capacitor C7 and pin 2 of wire-to-board surface mount connector U5 respectively; pin 8 of the dual-channel H-bridge driver chip U4 is connected to one end of capacitor C8 and pin 3 of wire-to-board surface mount connector U5 respectively; pin 7 of the dual-channel H-bridge driver chip U4 is connected to the other end of capacitor C8 and pin 1 of wire-to-board surface mount connector U5 respectively; and pin 6 of the dual-channel H-bridge driver chip U4 is grounded.

[0061] The use of a dual-channel H-bridge driver chip effectively reduces the number of circuit components and optimizes the circuit structure. Additionally, capacitors C7 and C8 are added between each phase sequence for energy storage, primarily addressing the issue of the stepper motor failing to start when the battery is low.

[0062] In this embodiment, the dual-channel H-bridge driver chip U4 is AT854, which has the following advantages:

[0063] Dual-channel design: It can drive two DC motors or one stepper motor, providing bidirectional control to enable the nozzle to swing left and right.

[0064] Built-in protection functions: It has overcurrent protection, overheat protection and undervoltage lockout, which improves system reliability and prevents motor stall damage.

[0065] Low on-resistance: MOSFET-based design with low on-resistance (approximately 0.5Ω), reducing power consumption and heat generation, making it suitable for battery-powered devices.

[0066] Wide voltage range: Operating voltage from 2.5V to 12V, compatible with a variety of battery configurations.

[0067] In addition to the AT854, the following alternative chips can also be used:

[0068] L298N: A classic dual H-bridge driver chip that can drive two DC motors or one stepper motor, with an output current of up to 2A per bridge. However, it has high power consumption and requires a heatsink, making it suitable for medium-power applications.

[0069] DRV8833: Low-voltage dual H-bridge driver, operating from 2.7V to 10.8V, with an output current of 1.5A, featuring a low-power mode, suitable for portable devices.

[0070] TB6612FNG: MOSFET-based H-bridge driver, high efficiency, 1.2A output current, built-in standby function, suitable for precision control, such as robots or medical equipment.

[0071] These chips receive PWM signals from the MCU to control the coil current of the stepper motor, thereby adjusting the motor's speed and direction. In the atomizing device, the stepper motor drives the peristaltic pump roller to rotate, achieving liquid delivery; simultaneously, it diffuses the mist through a oscillating mechanism. The H-bridge driver chip achieves forward and reverse motor rotation by changing the current direction and controls the speed through the PWM duty cycle. When selecting a chip, current capability, voltage range, and integrated protection functions must be considered.

[0072] The working principle of the stepper motor drive circuit is as follows: The MCU outputs two PWM signals to the dual-channel H-bridge driver chip U4, controlling the two coils of the stepper motor. The internal H-bridge of U4 changes the current direction according to the input logic, causing the motor to rotate. For example, stepping control can be achieved through a sequence of signals (such as A+, A-, B+, B-). The motor speed is controlled by the PWM frequency. ,in It refers to rotational speed (rpm). It is the PWM frequency (Hz). It is the number of steps per revolution.

[0073] Figure 5 This is a circuit diagram of the Hall switch circuit in the controller of the peristaltic pump-type handheld atomizing device of the present invention. Figure 5As shown, the Hall effect switch circuit includes: pin 1 of the Hall effect switch chip U6 is connected to one end of the capacitor C6 and connected to VBAT; the other end of the capacitor C6 is grounded; pin 2 of the Hall effect switch chip U6 is connected to one end of the resistor R3 and one end of the capacitor C9 respectively; the other end of the capacitor C9 is connected to pin 3 of the Hall effect switch chip U6; and the other end of the resistor R3 is connected to KEY1.

[0074] In this embodiment, the Hall effect switch chip U6 is CC6201ST, which has the following advantages:

[0075] High sensitivity: It can detect changes in weak magnetic fields, has a fast response speed, and is suitable for high-speed rotation monitoring.

[0076] Digital output: Outputs switch signals (high and low levels) for easy reading by the MCU, simplifying circuit design.

[0077] Low power consumption: Operating current as low as a few microamps, suitable for battery-powered devices.

[0078] Temperature stability: Built-in temperature compensation ensures stable performance over a wide temperature range.

[0079] In addition to the CC6201ST, the following alternative chips can also be used:

[0080] A3144: A classic Hall effect switch, low cost, high output current, but low sensitivity, suitable for medium and low speed applications.

[0081] SS49E: Linear Hall effect sensor, outputs analog voltage signal, which can be used for precise position detection, but requires ADC conversion, increasing the burden on the MCU.

[0082] TLE4905: A high-precision Hall switch with programmable threshold and fast response, suitable for harsh environments (such as those with large temperature variations).

[0083] These chips are a key component in forming a closed-loop control system. In the atomizing device, a magnet is attached to the peristaltic pump roller. When the roller rotates, a Hall effect chip detects the change in the magnetic field and outputs a pulse signal. The MCU counts the pulse frequency and calculates the rotational speed. ,in It refers to rotational speed (rpm). It is the number of pulses. This refers to time (in seconds). The MCU compares the actual rotation speed with the set value and adjusts the PWM output to ensure a stable atomization rate. The accuracy of the Hall switch directly affects the control effect; sensitivity, output type, and environmental adaptability must be considered when selecting it.

[0084] The Hall effect switch circuit works as follows: the Hall effect switch chip U6 detects the magnet on the cover as it approaches or moves away. The stepper motor's speed is controlled by a PWM signal generated by the MCU's P0.0 pin. When the magnet approaches, U6 outputs a low level; when it moves away, it outputs a high level, generating a pulse signal. The MCU counts these pulses using interrupts or a timer to calculate the rotational speed. ,in It refers to rotational speed (rpm). It is the number of pulses. It is time (seconds). The MCU compares the actual rotation speed with the set rotation speed and adjusts the PWM duty cycle of the stepper motor drive circuit to achieve precise control.

[0085] The use of Hall effect switches ensures complete isolation between the internal and external parts of the main unit. The absence of physical buttons effectively solves problems such as water leakage and moisture.

[0086] Figure 6 This is a circuit diagram of the charging circuit in the controller of the peristaltic pump-type handheld atomizing device of the present invention. Figure 6 As shown, the charging circuit includes: pin 1 of the charging management chip U7 is connected to pin 3 of the charging management chip U7 and one end of resistor R4 respectively; pin 2 of the charging management chip U7 is connected to the other end of resistor R4; pin 4 of the charging management chip U7 is connected to one end of resistor R6, one end of capacitor C12, one end of capacitor C13, one end of capacitor C14, and pin 8 of the charging management chip U7 respectively; the other end of capacitor C12 is connected to the other end of capacitor C13 and the other end of capacitor C14 respectively and grounded; pin 5 of the charging management chip U7 is connected to one end of capacitor C10 and one end of capacitor C11 respectively; the other end of capacitor C10 is connected to the other end of capacitor C11 and grounded.

[0087] In this embodiment, the charging management chip U7 is a TP4056, used in the charging circuit. Its advantages include:

[0088] Linear charging management: Supports constant current and constant voltage charging mode for lithium-ion batteries, with adjustable charging current (via external resistor), typically 1000mA.

[0089] Integrated protection: Built-in overheat protection, overcurrent protection and reverse battery connection protection enhance safety.

[0090] Simple peripheral circuitry: requires only a few external components (such as resistors and capacitors), reducing costs and enabling miniaturized designs.

[0091] Status indication: Provides a charging status output pin that can drive an LED to indicate charging in progress, fully charged, or fault.

[0092] The charging management chip uses an 8-pin design and can output real-time battery and host status, including: low battery, charging, fully charged, and no battery. A 5.1K resistor is added to the TYPE-C interface to accommodate various modern fast charging protocols and protect the small battery from high charging current.

[0093] In addition to TP4056, the following alternative chips can also be used:

[0094] BQ24075: A charging management chip manufactured by TI that supports USB charging and power path management. It can power both the battery and the system simultaneously and is suitable for devices that require continuous operation.

[0095] MCP73831: A miniature charging management chip with a small package (such as SOT-23), suitable for space-constrained applications, but with a low charging current (500mA).

[0096] LT3652: A solar charging management chip that supports charging multiple batteries, but its circuitry is complex and it is suitable for special environments.

[0097] These chips manage the battery charging process, ensuring safety and efficiency. In the atomizing device, when the USB interface is connected to a power source, the charging chip controls the charging current and voltage: during the constant current phase, the current... (For TP4056, where) (This is a programmable resistor, measured in Ω); during the constant voltage phase, the voltage is maintained at 4.2V (standard lithium-ion battery). The chip also monitors battery temperature and voltage to prevent overcharging. Charging current, integrated functions, and cost should be considered when selecting a chip.

[0098] The charging circuit works as follows: When the USB port is connected to a power source, the charging management chip U7 (such as TP4056) starts working. During the constant current phase, the chip charges at a set current; when the battery voltage approaches 4.2V, it switches to the constant voltage phase, gradually reducing the current. The charging current is set by the external resistor R4. (For TP4056). The chip outputs signals via status pins, such as the CHRG pin driving an LED to indicate the charging status. When the battery is fully charged, the chip enters trickle charging or shutdown mode.

[0099] Figure 7 This is a circuit diagram of the LED display circuit in the controller of the peristaltic pump-type handheld atomizing device of the present invention. Figure 7 As shown, the LED display circuit includes: one end of a common anode RGB three-color surface-mount light-emitting diode LED1 is connected to one end of a resistor R5.

[0100] In this embodiment, the common-anode RGB tri-color surface-mount LED1 is ZSRGB-2012C-10A-Z4, used in the LED display circuit. Its advantages include:

[0101] Integrated design: Three LED chips (red, green, and blue) are integrated into one package. The common anode connection simplifies the driving circuit, and the color can be adjusted by controlling the cathode.

[0102] Multi-color display: By controlling the brightness of each color through PWM, multiple colors (such as red, green, blue, yellow, purple, etc.) can be mixed to provide rich visual feedback.

[0103] Miniaturization: Surface mount package (2012 size, i.e., 2.0mm x 1.2mm), saving PCB space and suitable for handheld devices.

[0104] High brightness: Typical brightness is 1000-2000mcd, clearly visible both indoors and outdoors.

[0105] In addition to ZSRGB-2012C-10A-Z4, the following alternative components can also be selected:

[0106] Ordinary RGB LEDs: such as 5mm common anode RGB LEDs, are low in cost but large in size and require higher driving current.

[0107] WS2812B: Intelligent RGB LED with built-in controller and signal shaping circuitry. It can control multiple LEDs via a single-wire protocol (such as NeoPixel) to achieve dynamic effects, but requires dedicated driver code.

[0108] SK6812: Similar to WS2812B, but with better color consistency and low power mode.

[0109] These components provide the human-machine interface. In the atomizing device, the MCU controls the current of each color channel via PWM signals, mixing colors to display the operating status: for example, green indicates normal operation, red indicates low battery, blue indicates charging, and yellow indicates a malfunction. Color brightness is adjusted by the PWM duty cycle. ,in It's the duty cycle. It is the high-level time. It refers to the PWM cycle. When selecting it, size, driving method, and power consumption need to be considered.

[0110] The working principle of the LED display circuit is as follows: The three cathodes of the common anode RGB LED1 are connected to the PWM pin of the MCU through resistors. The MCU outputs a PWM signal to control the brightness and duty cycle of each color. ,in It is the high-level time. It's a cycle. Different colors are produced by mixing the brightness of red, green, and blue. For example, green flashes during normal operation, and red remains on when the battery is low. Resistor R5 limits the current to prevent overcurrent damage to the LED.

[0111] In some optional implementations of this embodiment, the device of the present invention further includes a USB interface circuit. Figure 8 This is a circuit diagram of the USB interface circuit in the controller of the peristaltic pump-type handheld atomizing device of the present invention. Figure 8 As shown, the USB interface circuit includes: pin A12 of USB interface USB1 is connected to one end of resistor R7 and one end of resistor R8 respectively and grounded; pin B5 of USB interface USB1 is connected to the other end of resistor R7; and pin A5 of USB interface USB1 is connected to the other end of resistor R8.

[0112] The USB interface circuit works as follows: the pins of the USB1 interface are connected to the power lines (VBUS and GND) and the data lines (D+ and D-). In the atomizing device, USB is mainly used for charging: VBUS is connected to the charging circuit to power the battery. The data lines can be connected to the serial port programming circuit for firmware updates. Resistors R7 and R8 are used for impedance matching, reducing signal reflection and ensuring stable communication.

[0113] In some optional implementations of this embodiment, the device of the present invention further includes a serial port programming circuit. The serial port programming circuit is used to program the MCU. The working principle of the serial port programming circuit is as follows: a computer and the MCU are connected via a serial interface (such as UART). The serial port programming circuit may include a level conversion chip (such as CH340) to convert USB signals to TTL levels (3.3V or 5V). The MCU's programming pins (such as TX, RX) are connected to the conversion chip, and the computer downloads the firmware to the MCU's flash memory using software (such as Keil or a dedicated programming tool). During programming, the MCU enters boot mode, receives data, and stores it.

[0114] This atomizing plate can be used at a frequency of 178K, which can effectively increase the amount of atomization.

[0115] The peristaltic pump-type handheld atomizer of this invention operates on the principle of coordinated operation of various sub-circuits to achieve precise delivery and atomization of liquids. The entire device is coordinated by an MCU control circuit, and the user selects the working mode (such as continuous atomization or intermittent atomization) and atomization rate via buttons or settings.

[0116] Device startup: When the user turns on the power switch, the battery powers all the circuits. The MCU initializes, reads preset parameters (such as atomization rate and oscillation mode), and starts each drive circuit.

[0117] Atomization process: The MCU outputs a PWM signal to the piezoelectric ceramic plate drive circuit. PWM signal frequency. The vibration frequency of the piezoelectric ceramic sheet is typically between 100 kHz and 200 kHz. Driven by high voltage, the piezoelectric ceramic sheet generates high-frequency vibrations, breaking the liquid into tiny particles (approximately 1-5 micrometers in diameter), forming a mist. Atomization rate... It is related to the vibration intensity, and the formula is:

[0118] ,in: : Atomization output rate (mL / min) represents the volume of liquid atomized per unit time. The efficiency constant depends on the material of the piezoelectric ceramic sheet and the driving voltage. PWM frequency (Hz), set by the MCU. The vibration amplitude is proportional to the driving voltage amplitude.

[0119] Liquid supply process: Simultaneously, the MCU outputs another PWM signal to the stepper motor drive circuit, driving the peristaltic pump roller to rotate. The peristaltic pump delivers liquid by squeezing the tubing, delivering a fixed volume per revolution. The flow rate formula is: ,in: Liquid supply flow rate (mL / min) indicates the volume of liquid delivered per unit time. The peristaltic pump roller speed (rpm) is controlled by a stepper motor. Volume delivered per revolution (mL / rev) depends on the inner diameter of the hose and the roller design.

[0120] The MCU controls the stepper motor speed by adjusting the PWM duty cycle, thereby precisely matching the liquid supply and atomization volume to avoid liquid waste or dry burning.

[0121] The Hall chip outputs a pulse signal, and the MCU counts the number of pulses. In time Calculate the actual rotational speed within (seconds):

[0122] ,in: Actual rotational speed (rpm). : Pulse count, which is related to the number of magnets on the roller. Sampling time (seconds).

[0123] MCU Comparison With set speed Adjust the PWM output using a PID algorithm:

[0124] ,in:

[0125] : Adjusted PWM duty cycle. : Current PWM duty cycle. :error, . Proportional, integral, and derivative coefficients are adjusted based on the system response.

[0126] This ensures a stable atomization rate, even with changes in battery voltage or load fluctuations.

[0127] Fog diffusion: A stepper motor simultaneously drives a peristaltic pump, converting rotation into oscillation via gears or linkages. Oscillation angle. Determined by the motor control sequence, the formula is:

[0128] ,in: : Swing angle (degrees). : The number of steps sent by the MCU.

[0129] Steps per revolution of the motor (e.g., 200 steps / revolution).

[0130] The oscillation allows the fog to spread evenly, expanding the coverage area.

[0131] Charging Management: The charging circuit is activated when the device is connected to the USB port. The charging management chip adjusts the charging based on the battery voltage. Adjusting the charging current For TP4056, the constant current stage current is: ,in: : Charging current (mA). Programmable resistor (Ω), typical value 1.2kΩ corresponds to 1000mA.

[0132] Battery power is monitored via ADC, remaining capacity The estimate is:

[0133] ,in: Remaining battery capacity (mAh).

[0134] Total capacity (mAh). Current battery voltage (V). Minimum operating voltage (e.g., 3.0V). Fully charged (4.2V).

[0135] User interaction: The LED display circuit displays the status according to MCU instructions. Color is controlled by the PWM duty cycle; for example, green duty cycle... Indicates normal operation:

[0136] ,in: Green LED duty cycle (%)

[0137] Green high level duration (seconds). PWM period (seconds).

[0138] When the battery is low, the red LED flashes to remind the user to charge.

[0139] The overall workflow of this invention's device is as follows: After the user sets the parameters, the MCU initiates atomization and liquid supply, maintaining stability through closed-loop control. The nozzle oscillates to diffuse the mist, and LEDs provide real-time feedback. During charging, the circuit automatically manages the process to ensure safety. The serial port programming circuit allows for firmware upgrades and performance optimization. The entire device is efficient, portable, and suitable for medical, beauty, or home atomization scenarios.

[0140] The beneficial effects of the present invention, through the design of the above embodiments, are as follows:

[0141] (1) The MCU control circuit is the core. It precisely controls the stepper motor drive circuit through the PWM signal line, thereby controlling the speed and direction of the peristaltic pump roller. It can flexibly adjust the atomization amount according to different needs to achieve precise drug delivery or environmental humidification.

[0142] (2) The piezoelectric ceramic plate driving circuit efficiently converts electrical energy into mechanical vibration, making the liquid atomized fine and uniform, improving the atomization effect and enhancing the user experience;

[0143] (3) The Hall switch circuit can directly control the stepper motor through PWM to ensure stable and reliable operation of the device and avoid the atomization quality being affected by abnormal speed;

[0144] (4) The charging circuit realizes intelligent charging, which can automatically identify the charging status, prevent overcharging and over-discharging, extend the battery life, and improve the portability and durability of the device.

[0145] (5) The LED display circuit provides a clear and intuitive human-machine interface, which can display key parameters such as working mode, remaining power, and atomization rate in real time, so that users can keep track of the device's operation at any time and adjust the operation in a timely manner, greatly improving the convenience and safety of use.

[0146] This invention has been described with reference to specific embodiments, but those skilled in the art will understand that various changes and equivalent substitutions can be made without departing from the scope of the invention. Furthermore, numerous modifications can be made to this invention to suit specific applications without departing from its protection scope. Therefore, this invention is not limited to the specific embodiments disclosed herein, but includes all embodiments falling within the scope of the claims.

Claims

1. A peristaltic pump handheld nebulizer device, characterized by, The utility model relates to a kind of medical treatment devices, including: Peristaltic pump; Atomizer; And controller, the controller is electrically connected with the peristaltic pump and the atomizer respectively, for controlling the infusion action of the peristaltic pump and the atomization action of the atomizer.

2. The peristaltic pump handheld atomization device of claim 1, wherein, The controller includes: MCU control circuit, piezoelectric ceramic sheet drive circuit, stepper motor drive circuit, hall switch circuit, charging circuit and LED display circuit electrically connected with the MCU control circuit, the MCU control circuit is connected with the stepper motor drive circuit by PWM signal line, for controlling the rotating speed and direction of peristaltic pump roller, the piezoelectric ceramic drive circuit is used to convert electrical energy into mechanical vibration, realize liquid atomization, the stepper motor drive circuit is used to drive the peristaltic pump to realize mist diffusion, the hall switch circuit is used to control stepper motor by PWM, the charging circuit is used to realize the intelligent charging of the device, the LED display circuit is used for human-computer interaction, display working mode, remaining power, atomization rate parameter.

3. The peristaltic pump handheld atomization device of claim 2, wherein, The MCU control circuit includes MCU U1, the MCU U1 is provided with single-path 8-bit PWM and multi-path 16-bit PWM output, output PWM square wave signal, the MCU U1 is used to drive the ceramic sheet, control stepper motor.

4. The peristaltic pump handheld atomization device of claim 2, wherein, The piezoelectric ceramic sheet drive circuit includes: the pin 2 of atomization sheet 1 is connected with one end of inductor L1, the other end of inductor L1 is connected with the pin 3 of inductor U2, the pin 1 of inductor U2 is connected with the drain of MOSFET chip U3, the source of MOSFET chip U3 is connected with one end of resistor R2 and grounded, the gate of MOSFET chip U3 is connected with the other end of resistor R2 and one end of resistor R1 respectively, the other end of resistor R1 is connected with PWM signal from the MCU control circuit.

5. The peristaltic pump handheld atomization device of claim 2, wherein, The stepper motor drive circuit includes: the pin 1 of double-channel H-bridge drive chip U4 is connected with the positive pole of capacitor C5 and one end of capacitor C4 and connected with VBAT, the pin 10 of double-channel H-bridge drive chip U4 is connected with one end of capacitor C7 and the pin 4 of wire-to-board paster connector U5 respectively, the pin 9 of double-channel H-bridge drive chip U4 is connected with the other end of capacitor C7 and the pin 2 of wire-to-board paster connector U5 respectively, the pin 8 of double-channel H-bridge drive chip U4 is connected with one end of capacitor C8 and the pin 3 of wire-to-board paster connector U5 respectively, the pin 7 of double-channel H-bridge drive chip U4 is connected with the other end of capacitor C8 and the pin 1 of wire-to-board paster connector U5 respectively, the pin 6 of double-channel H-bridge drive chip U4 is grounded.

6. The peristaltic pump handheld atomization device of claim 2, wherein, The hall switch circuit includes: the pin 1 of hall effect switch chip U6 is connected with one end of capacitor C6 and connected with VBAT, the other end of capacitor C6 is grounded, the pin 2 of hall effect switch chip U6 is connected with one end of resistor R3 and one end of capacitor C9 respectively, the other end of capacitor C9 is connected with the pin 3 of hall effect switch chip U6, the other end of resistor R3 is connected with KEY1.

7. The peristaltic pump handheld atomization device of claim 2, wherein, The charging circuit comprises: the pin 1 of the charging management chip U7 is connected with the pin 3 of the charging management chip U7 and one end of the resistor R4 respectively, the pin 2 of the charging management chip U7 is connected with the other end of the resistor R4, the pin 4 of the charging management chip U7 is connected with one end of the resistor R6, one end of the capacitor C12, one end of the capacitor C13, one end of the capacitor C14 and the pin 8 of the charging management chip U7 respectively, the other end of the capacitor C12 is connected with the other end of the capacitor C13 and the other end of the capacitor C14 and grounded, the pin 5 of the charging management chip U7 is connected with one end of the capacitor C10 and one end of the capacitor C11 respectively, and the other end of the capacitor C10 is connected with the other end of the capacitor C11 and grounded.

8. The peristaltic pump handheld atomization device of claim 2, wherein, The LED display circuit comprises: one end of the common anode RGB three-color patch type light emitting diode LED1 is connected with one end of the resistor R5.

9. The peristaltic pump handheld atomization device of claim 2, wherein, The device further comprises a USB interface circuit.

10. The peristaltic pump handheld atomization device of claim 2, wherein, The device further comprises a serial port burning circuit.

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