A nebulization control circuit that synchronizes with breathing rhythm

Abstract

This application provides a nebulizer control circuit for synchronized breathing rhythm, relating to the field of signal control. The circuit includes a sampling module, a main control module, a nebulizer module, and a power supply. The sampling module is connected to the main control module, which in turn is connected to the nebulizer module. The power supply is connected to each of the three modules, providing power to them respectively. The nebulizer module is also connected to an nebulizer plate. When the sampling module detects a patient's inhalation, it generates a sampling signal and outputs it to the main control module. Upon receiving the sampling signal, the main control module generates a control signal, controlling the nebulizer module to convert the power supply voltage into a high-frequency driving voltage to drive the nebulizer plate. The nebulizer delivery strategy is adjusted according to the patient's real-time breathing rhythm, delivering nebulizer to the patient during inhalation and stopping delivery when the patient is not inhaling. This effectively prevents choking and improves the patient experience.

Description

Technical Field

[0001] This application relates to the field of medical devices, specifically to a nebulization control circuit that synchronizes breathing rhythm. Background Technology

[0002] A medical nebulizer is a medical device used to treat upper respiratory tract diseases. Its principle is to boost the voltage provided by the power supply and then resonate it to generate a high-frequency driving voltage to drive the nebulizer plate to work. By atomizing the liquid medicine into tiny particles, the patient can inhale them into the respiratory tract and lungs to achieve the purpose of treatment.

[0003] The existing nebulizers deliver mist through active mist delivery, which means that the medication is continuously nebulized for the patient to inhale. In actual use, the continuous operation of the nebulizer can cause patients to choke, resulting in a poor patient experience. Summary of the Invention

[0004] This application provides a nebulizer control circuit that synchronizes with the patient's breathing rhythm. It delivers nebulizer to the patient based on the patient's inhalation and stops delivering nebulizer when no inhalation is detected. This solves the problem of choking caused by continuous operation of the nebulizer and improves the patient experience.

[0005] This application provides a nebulization control circuit for synchronizing breathing rhythm. The circuit includes a sampling module, a main control module, a nebulization module, and a power supply. The sampling module is connected to the main control module, the main control module is connected to the nebulization module, and the power supply is connected to the sampling module, the main control module, and the nebulization module respectively to supply power to the sampling module, the main control module, and the nebulization module. The nebulization module is also connected to an nebulizing plate.

[0006] The sampling module is used to generate a sampling signal and output the sampling signal to the main control module. The sampling signal is generated by the sampling module when it detects the patient's inhalation action.

[0007] The main control module is used to generate a control signal after receiving the sampling signal, and output the control signal to the atomization module;

[0008] The atomizing module is used to boost the power supply voltage based on the control signal, and to resonate the boosted voltage to output a driving voltage, which is used to drive the atomizing plate to work.

[0009] By adopting the above technical solution, the sampling module generates a sampling signal when it detects the patient's inhalation and outputs the sampling signal to the main control module. After receiving the sampling signal, the main control module generates a control signal to control the nebulization module to convert the power supply voltage into a high-frequency driving voltage to drive the nebulizer. The nebulization strategy is adjusted according to the patient's real-time breathing rhythm, delivering nebulizer to the patient when the patient inhales and stopping nebulizer delivery when the patient does not inhale. This can effectively prevent the patient from choking and thus improve the patient experience.

[0010] Optionally, the atomization module includes an atomization power control unit, a boost unit, and a resonant drive unit; the atomization power control unit is connected to the main control module, the boost unit, and the power supply respectively; the resonant drive unit is connected to the boost unit and the main control module respectively; the control signal includes a first control signal and a second control signal.

[0011] The atomizing power control unit is used to turn on the power supply voltage to the boost unit after receiving the first control signal;

[0012] The boost unit is used to boost the power supply voltage to obtain the output voltage;

[0013] The resonant drive unit is used to perform resonant processing on the output voltage based on the second control signal, and output the drive voltage.

[0014] By adopting the above technical solution, the first control signal of the main control module is a DC enable signal, which can control the DC voltage input of the entire atomizing module. The second control signal is a PWM control signal, which is used to control the resonant frequency of the resonant unit, thereby controlling the frequency of the output voltage. Therefore, the entire atomizing module can boost the power supply voltage according to the first and second control signals of the main control module, and resonate the boosted output voltage to obtain the driving voltage to drive the atomizing plate to work.

[0015] Optionally, the atomizing power control unit includes a first MOSFET and a first resistor;

[0016] The gate of the first MOS transistor is connected to the main control module, the source of the first MOS transistor is connected to the power supply, and the drain of the first MOS transistor is connected to the boost unit.

[0017] The first end of the first resistor is connected to the gate of the first MOS transistor, and the second end of the first resistor is connected to the source of the first MOS transistor.

[0018] By adopting the above technical solution, after receiving the first control signal of the master control mode, the gate of the first MOS transistor makes the source and drain conduct, thereby enabling the power supply voltage to be connected to the boost unit.

[0019] Optionally, the boost unit includes a first capacitor, a second capacitor, a first inductor, a first diode, a third capacitor, a fourth capacitor, a DC boost chip, a second resistor, and a third resistor;

[0020] The first terminal of the first capacitor is connected to the atomizing power control unit, and the second terminal of the first capacitor is grounded.

[0021] The first terminal of the second capacitor is connected to the atomizing power control unit, and the second terminal of the second capacitor is grounded.

[0022] The first end of the first inductor is connected to the atomizing power control unit, and the second end of the first inductor is connected to the switching pin of the DC boost chip.

[0023] The positive terminal of the first diode is connected to the second terminal of the first inductor, and the negative terminal of the first diode is connected to the resonant driving unit.

[0024] The first terminal of the third capacitor is connected to the negative terminal of the first diode, and the second terminal of the third capacitor is grounded.

[0025] The first terminal of the fourth capacitor is connected to the negative terminal of the first diode, and the second terminal of the fourth capacitor is grounded.

[0026] The first end of the second resistor is connected to the negative terminal of the first diode, and the second end of the second resistor is connected to the feedback pin of the DC boost chip.

[0027] The first end of the third resistor is connected to the second end of the second resistor, and the second end of the third resistor is grounded;

[0028] The enable pin of the DC-DC boost chip is connected to the negative terminal of the first diode, the power supply pin of the DC-DC boost chip is connected to the negative terminal of the first diode, and the ground pin of the DC-DC boost chip is grounded.

[0029] By adopting the above technical solution, the power supply voltage of the input boost unit is filtered using the first and second capacitors. The DC boost chip, the first inductor, the first diode, the third capacitor, and the fourth capacitor constitute the BOOST circuit, which boosts the power supply voltage through the control of the DC boost chip.

[0030] Optionally, the resonant driving unit includes a three-legged inductor, a fifth capacitor, a second MOSFET, a fourth resistor, and a fifth resistor;

[0031] The first end of the three-legged inductor is connected to the boost unit, the second end of the three-legged inductor is connected to the first end of the fifth capacitor, and the third end of the three-legged inductor is connected to the second end of the fifth capacitor.

[0032] The drain of the second MOSFET is connected to the second terminal of the three-pin inductor, the gate of the second MOSFET is connected to the first terminal of the fourth resistor, the second terminal of the fourth resistor is connected to the main control module, the source of the second MOSFET is connected to the first terminal of the fifth resistor, the second terminal of the fifth resistor is grounded, and the source of the second MOSFET is connected to the main control module.

[0033] By adopting the above technical solution, the second control signal of the main control module controls the conduction and cutoff of the second MOS transistor. At the same time, the three-legged inductor and the fifth capacitor form an LC resonant circuit under the control of the second MOS transistor, thereby outputting a higher frequency driving voltage to drive the atomizing sheet to work.

[0034] Optionally, the atomizing module further includes a DC isolation unit, which includes a sixth capacitor and a seventh capacitor;

[0035] The first terminal of the sixth capacitor is connected to the first terminal of the fifth capacitor, and the second terminal of the sixth capacitor is connected to the first interface of the atomizing plate.

[0036] The first terminal of the seventh capacitor is connected to the second terminal of the fifth capacitor, and the second terminal of the sixth capacitor is connected to the second interface of the atomizing plate.

[0037] By adopting the above technical solution, the DC component in the driving voltage is filtered out using an isolation unit, thus ensuring the stability of the driving voltage.

[0038] Optionally, the circuit further includes a voltage regulator module, which is connected to both the power supply and the sampling module.

[0039] The voltage regulator module is used to provide a stable DC voltage for the sampling module.

[0040] By adopting the above technical solution, the power supply voltage is stabilized, so that the sampling module has a stable power supply voltage, avoiding interference from unstable power supply voltage to the sampling module.

[0041] Optionally, the voltage regulator module includes a linear low-dropout regulator, an eighth capacitor, a ninth capacitor, and a tenth capacitor;

[0042] The input port of the linear low dropout regulator is connected to the power supply, the output port of the linear low dropout regulator is connected to the sampling module, and the grounding port of the linear low dropout regulator is grounded.

[0043] The first terminal of the eighth capacitor is connected to the power supply, and the second terminal of the eighth capacitor is grounded.

[0044] The first terminal of the ninth capacitor is connected to the power supply, and the second terminal of the ninth capacitor is grounded.

[0045] The first terminal of the tenth capacitor is connected to the power supply, and the second terminal of the tenth capacitor is grounded.

[0046] Optionally, the circuit further includes a button switching module; the button switching module is connected to the main control module.

[0047] By adopting the above technical solution, a linear low-dropout regulator is used to regulate the power supply voltage, and the voltages of both the input and output linear low-dropout regulators are filtered to achieve the voltage regulation function.

[0048] The button switching module is used to control the main control module to switch between a first mode and a second mode. The first mode is when the main control module continuously outputs the control signal to the atomizing module, and the second mode is when the main control module outputs the control signal to the atomizing module when it receives a sampling signal.

[0049] By sampling the above technical solutions, the mist delivery mode can be switched via a button switching module according to the patient's preference, thereby improving the patient's user experience.

[0050] Optionally, the button switching module is a button switch;

[0051] The first terminal of the push-button switch is connected to the main control module, and the second terminal of the push-button switch is grounded.

[0052] By adopting the above technical solution, the mist delivery mode can be switched using a button switch, which can reduce the difficulty of operation for patients.

[0053] In summary, the beneficial effects of the technical solution of this application include:

[0054] When the sampling module detects a patient's inhalation, it generates a sampling signal and outputs it to the main control module. Upon receiving the sampling signal, the main control module generates a control signal to control the nebulizer module to convert the power supply voltage into a high-frequency driving voltage to drive the nebulizer pad. The nebulization strategy is adjusted according to the patient's real-time breathing rhythm, delivering nebulizer to the patient when inhaling and stopping nebulizer delivery when the patient is not inhaling. This effectively prevents choking problems and improves the patient experience. Attached Figure Description

[0055] Figure 1This is a schematic diagram of a nebulization control circuit for synchronized breathing rhythm provided in an embodiment of this application;

[0056] Figure 2 This is a schematic diagram of another nebulization control circuit for synchronizing breathing rhythm provided in an embodiment of this application;

[0057] Figure 3 This is a topology circuit diagram of a nebulization control circuit for synchronizing breathing rhythm provided in an embodiment of this application;

[0058] Figure 4 This is a topology circuit diagram of an atomizing power control unit 301 provided in an embodiment of this application;

[0059] Figure 5 This is a topology circuit diagram of a boost unit 302 provided in an embodiment of this application;

[0060] Figure 6 This is a topology circuit diagram of a resonant driving unit 303 provided in an embodiment of this application;

[0061] Figure 7 This is a topology circuit diagram of a voltage regulator module 40 provided in an embodiment of this application.

[0062] Explanation of reference numerals in the attached diagram: 10, sampling module; 20, main control module; 30, atomization module; 301, atomization power control unit; 302, boost unit; 303, resonant drive unit; 304, DC isolation unit; 40, voltage regulator module; 50, button switching module. Detailed Implementation

[0063] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0064] In the description of the embodiments of this application, words such as "illustrative," "for example," or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "illustrative," "for example," or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Rather, the use of words such as "illustrative," "for example," or "for example" is intended to present the relevant concepts in a specific manner.

[0065] In the description of the embodiments of this application, the term "multiple" means two or more. For example, multiple systems means two or more systems, and multiple screen terminals means two or more screen terminals. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. The terms "comprising," "including," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0066] Please see Figure 1 , Figure 1 This is a schematic diagram of a nebulization control circuit for synchronized breathing rhythm provided in an embodiment of this application. The nebulization control circuit for synchronized breathing rhythm includes a sampling module 10, a main control module 20, a nebulization module 30, and a power supply. The sampling module 10 is connected to the main control module 20, the main control module 20 is connected to the nebulization module 30, and the power supply is connected to the sampling module 10, the main control module 20, and the nebulization module 30 respectively to supply power to the sampling module 10, the main control module 20, and the nebulization module 30. The nebulization module 30 is also connected to an nebulizing plate.

[0067] The sampling module 10 is used to generate a sampling signal and output the sampling signal to the main control module 20. The sampling signal is generated by the sampling module 10 when it detects the patient's inhalation action.

[0068] The main control module 20 is used to generate a control signal after receiving the sampling signal and output the control signal to the atomization module 30;

[0069] The atomizing module 30 is used to boost the power supply voltage based on the control signal, and to resonate the boosted voltage to output a driving voltage, which is used to drive the atomizing plate to work.

[0070] The sampling module 10 can be an airflow sensor, a pressure sensor, or a motion sensor. For example, a valve-like structure can be installed within the nebulized airway. During inhalation, the valve actuates, allowing the pressure sensor or motion sensor to detect the patient's inhalation. The sampling signal generated by the sampling module 10 can be a high-level signal.

[0071] The main control module 20 may be an MCU, equipped with logic or program that implements the embodiments of this application. The control signal may be an enable signal or a PWM control signal.

[0072] The atomizing module 30 can be multiple units integrated on the same device or the same PCB board, or multiple units arranged on different devices or different PCB boards, to achieve the conversion of power supply voltage into driving voltage based on control signals. The driving voltage can be a high-frequency oscillation voltage.

[0073] The sampling module 10 generates a sampling signal when it detects a patient's inhalation. The sampling signal lasts until no further inhalation is detected, at which point it stops. The sampling signal is then output to the main control module 20. Upon receiving the sampling signal, the main control module 20 outputs a control signal to control the nebulizer module 30. The nebulizer module 30 operates for the duration of the sampling signal. The nebulizer module 30 boosts the power supply voltage and resonates the boosted voltage to output a driving voltage that powers the nebulizer. This achieves the goal of delivering mist when the patient inhales and stopping mist delivery when the patient does not inhale.

[0074] Please see Figure 2 This is a schematic diagram of another nebulization control circuit for synchronized breathing rhythm provided in an embodiment of this application. The nebulization control circuit includes a nebulization power control unit 301, a boost unit 302, and a resonant drive unit 303. The nebulization power control unit 301 is connected to the main control module 20, the boost unit 302, and the power supply. The resonant drive unit 303 is connected to the boost unit 302 and the main control module 20. The control signals include a first control signal and a second control signal. The nebulization power control unit 301, upon receiving the first control signal, turns on the power supply voltage to the boost unit 302. The boost unit 302 boosts the power supply voltage to obtain an output voltage. The resonant drive unit 303 resonates the output voltage based on the second control signal to output a drive voltage.

[0075] In the embodiments of this application, please refer to Figure 3 This is a topology diagram of a nebulization control circuit for synchronized breathing rhythm provided in an embodiment of this application. The sampling module 10, main control module 20, and nebulization module 30 are powered by the same power supply voltage. The power supply voltage is a low-voltage DC voltage. Without introducing other voltage inputs, the power supply voltage needs to be converted into a driving voltage capable of driving the nebulizer plate. The driving voltage is a voltage with a high oscillation frequency.

[0076] In this embodiment, when the voltage input to the atomizing module 30 is a voltage of other voltage levels, the atomizing module 30 should be adjusted accordingly so that it can output a driving voltage that matches the operation of the atomizing plate after receiving the control signal.

[0077] The atomization power control unit 301 can be a MOSFET, a relay controlled by the first control signal, or hardware with a relay switch structure. The atomization control unit 31 is located between the power supply and the boost unit 302 and is used to conduct the power supply voltage to the boost unit 302 after receiving the first control signal. The first control signal can be a signal pulse or an enable signal that can control the relay or hardware with a relay switch structure.

[0078] Please see Figure 4 The above is a topology circuit diagram of an atomizing power control unit 301 provided in an embodiment of this application.

[0079] In one embodiment, the atomization power control unit 301 includes a first MOSFET Q1 and a first resistor R1; the gate of the first MOSFET Q1 is connected to the main control module 20, the source of the first MOSFET Q1 is connected to the power supply, and the drain of the first MOSFET Q1 is connected to the boost unit 302; the first end of the first resistor R1 is connected to the gate of the first MOSFET Q1, and the second end of the first resistor R1 is connected to the source of the first MOSFET Q1.

[0080] In this design, the first MOSFET Q1 is an N-channel enhancement-mode MOSFET. For example, after its gate receives the first control signal output from the main control module 20, the first MOSFET Q1 turns on. The power supply voltage flows from the source to the drain of the first MOSFET Q1, then to the boost unit 302, undergoes boost processing, and then resonant processing to obtain the driving voltage, enabling the nebulizer to operate and thus delivering mist to the patient when the patient's inhalation is detected. When the gate of the first MOSFET Q1 does not receive the DC enable signal output from the main control module 20, the first MOSFET Q1 is turned off, and the entire nebulizer module has no power supply voltage input. Therefore, there is no driving voltage across the nebulizer, and mist delivery to the patient stops when no inhalation is detected. It can be understood that not detecting the patient's inhalation includes the patient's exhalation or stopping the use of the nebulizer and not performing any breathing actions.

[0081] The first resistor R1 is connected between the gate and source of the first MOSFET Q1. Since the gate and source of the first MOSFET Q1 have parasitic capacitance, the first resistor R1 can be used to prevent the power supply voltage output to the boost unit 302 from oscillating.

[0082] Please see Figure 5 The above is a topology circuit diagram of a boost unit 302 provided in an embodiment of this application.

[0083] In one embodiment, the boost unit 302 includes a first capacitor C1, a second capacitor C2, a first inductor L1, a first diode D1, a third capacitor C3, a fourth capacitor C4, a DC-DC boost chip, a second resistor R2, and a third resistor R3; the first terminal of the first capacitor C1 is connected to the atomization power control unit 301, and the second terminal of the first capacitor C1 is grounded; the first terminal of the second capacitor C2 is connected to the atomization power control unit 301, and the second terminal of the second capacitor C2 is grounded; the first terminal of the first inductor L1 is connected to the atomization power control unit 301, and the second terminal of the first inductor L1 is connected to the switch pin of the DC-DC boost chip; the anode of the first diode D1 is connected to the second terminal of the first inductor L1, and the first diode D1... The negative terminal of the first capacitor C3 is connected to the resonant drive unit 303; the first terminal of the third capacitor C3 is connected to the negative terminal of the first diode D1, and the second terminal of the third capacitor C3 is grounded; the first terminal of the fourth capacitor C4 is connected to the negative terminal of the first diode D1, and the second terminal of the fourth capacitor C4 is grounded; the first terminal of the second resistor R2 is connected to the negative terminal of the first diode D1, and the second terminal of the second resistor R2 is connected to the feedback pin of the DC boost chip; the first terminal of the third resistor R3 is connected to the second terminal of the second resistor R2, and the second terminal of the third resistor R3 is grounded; the enable pin of the DC boost chip is connected to the negative terminal of the first diode D1, the power supply pin of the DC boost chip is connected to the negative terminal of the first diode D1, and the ground pin of the DC boost chip is grounded.

[0084] The boost unit 302 can be divided into three parts according to its different functions, as follows:

[0085] The first part is: the first capacitor C1 and the second capacitor C2 play a filtering role in the circuit, filtering the power supply voltage input by the atomizing power control unit 301, and the switching on and off of the first MOSFET Q1 also generates high-frequency components, which filter the power supply voltage to obtain a stable DC voltage.

[0086] The second part consists of a first inductor L1, a first diode D1, a third capacitor C3, a fourth capacitor C4, and a DC-DC boost chip, forming a structure similar to a BOOST circuit. The DC-DC boost chip has a built-in drive circuit, and the first inductor L1 is an energy storage element. The boost principle is as follows: when the second terminal of the first inductor L1 is grounded through the switch pin of the DC-DC boost chip, the power supply voltage charges the first inductor L1. When the second terminal of the first inductor L1 is not grounded through the switch pin of the DC-DC boost chip, the energy stored in the first inductor L1 is discharged to the downstream end through the first diode D1. The voltage stored in the inductor is superimposed on the power supply voltage, achieving a boost. The built-in drive circuit of the DC-DC boost chip can ground the first inductor L1 when the negative terminal of the first diode D1 outputs a voltage. When the power supply pin and enable pin of the DC-DC boost chip are energized, the switch pin is grounded, thus grounding the first inductor L1. After the first inductor L1 is grounded, the enable pin is de-energized, causing the switch pin to be ungrounded, thereby utilizing the BOOST circuit to achieve the boost effect.

[0087] In one feasible implementation, the first diode D1 can be a Schottky diode with low forward conduction voltage and short response time.

[0088] The third part consists of a feedback circuit composed of the second resistor R2, the third resistor R3, and the DC boost chip. The final output voltage is divided by the second resistor R2 and the third resistor R3 to obtain the feedback voltage input to the feedback pin of the DC boost chip. The control frequency of the DC boost chip is adjusted according to the feedback voltage to ensure that the output voltage meets the requirements and remains stable.

[0089] Please see Figure 6 The above is a topology circuit diagram of a resonant driving unit 303 provided in an embodiment of this application.

[0090] In one embodiment, the resonant driving unit 303 includes a three-legged inductor, a fifth capacitor C5, a second MOSFET Q2, a fourth resistor R4, and a fifth resistor R5. The first end of the three-legged inductor is connected to the boost unit 302, the second end of the three-legged inductor is connected to the first end of the fifth capacitor C5, and the third end of the three-legged inductor is connected to the second end of the fifth capacitor C5. The drain of the second MOSFET Q2 is connected to the second end of the three-legged inductor, the gate of the second MOSFET Q2 is connected to the first end of the fourth resistor R4, the second end of the fourth resistor R4 is connected to the main control module 20, the source of the second MOSFET Q2 is connected to the first end of the fifth resistor R5, and the second end of the fifth resistor R5 is grounded. The source of the second MOSFET Q2 is connected to the main control module 20.

[0091] The second control signal from the main control module 20 reaches the gate of the second MOSFET Q2 via the fourth resistor R4. This second control signal is a PWM control signal, which controls the conduction and cutoff of the second MOSFET Q2. The output voltage forms an LC oscillation circuit through the three-legged inductor and the fifth capacitor C5, achieving resonance under the control of the PWM signal. Simultaneously, the three-legged inductor converts primary electrical energy into magnetic energy. When this magnetic energy is induced in the secondary winding, it is converted back into electrical energy. Adjusting the primary and secondary inductances of the three-legged inductor can also increase the drive voltage. The source voltage of the second MOSFET Q2 is divided by the fifth resistor R5 and output to the main control module 20, feeding back the resonant frequency so that the main control module 20 can accurately adjust the resonant frequency by adjusting the second control signal.

[0092] Please see Figure 3 In one embodiment, the atomizing module further includes a DC isolation unit 304, which includes a sixth capacitor C6 and a seventh capacitor C7; the first end of the sixth capacitor C6 is connected to the first end of the fifth capacitor C5, and the second end of the sixth capacitor C6 is connected to the first interface of the atomizing plate; the first end of the seventh capacitor C7 is connected to the second end of the fifth capacitor C5, and the second end of the sixth capacitor C6 is connected to the second interface of the atomizing plate.

[0093] Before the driving voltage is output to the atomizing plate, the fifth capacitor C5 and the sixth capacitor C6 are connected. The fifth capacitor C5 and the sixth capacitor C6 are isolation capacitors, which isolate the DC component in the driving voltage and protect the atomizing plate during the opening and closing of the atomizing module.

[0094] Please see Figure 7 This is a topology circuit diagram of a voltage regulator module 40 provided in an embodiment of this application.

[0095] In one embodiment, the circuit further includes a voltage regulator module 40, which is connected to both the power supply and the sampling module 10. The voltage regulator module 40 provides a stable DC voltage to the sampling module 10. The voltage regulator module 40 includes a linear low-dropout regulator, an eighth capacitor C8, a ninth capacitor C9, and a tenth capacitor C10. The input port of the linear low-dropout regulator is connected to the power supply, the output port of the linear low-dropout regulator is connected to the sampling module 10, and the ground port of the linear low-dropout regulator is grounded. The first terminal of the eighth capacitor C8 is connected to the power supply, and the second terminal of the eighth capacitor C8 is grounded. The first terminal of the ninth capacitor C9 is connected to the power supply, and the second terminal of the ninth capacitor C9 is grounded. The first terminal of the tenth capacitor C10 is connected to the power supply, and the second terminal of the tenth capacitor C10 is grounded.

[0096] A low dropout regulator is a type of linear DC regulator that produces a voltage lower than the original voltage after regulation. For example, if the power supply voltage is 4.2V DC, it is filtered by the eighth capacitor C8 and then enters the low dropout regulator, outputting a 3.3V DC voltage. This 3V DC voltage is then filtered by the ninth capacitor C9 and the tenth capacitor C10 to power the sampling module 10. The ninth capacitor C9 is located near the low dropout regulator, and the tenth capacitor C10 is located near the sampling module 10.

[0097] In one possible implementation, the circuit further includes a button switching module 50; the button switching module 50 is connected to the main control module 20; the button switching module 50 is used to control the main control module 20 to switch between a first mode and a second mode, wherein the first mode is a mode in which the main control module 20 continuously outputs control signals to the atomizing module, and the second mode is a mode in which the main control module 20 outputs control signals to the atomizing module when it receives a sampling signal. The button switching module 50 is a button switch; the first terminal of the button switch is connected to the main control module 20, and the second terminal of the button switch is grounded.

[0098] By controlling the button switch, the main control module 20 continuously outputs control signals, causing the nebulizer module to continuously output drive voltage to drive the nebulizer pad, allowing the patient to switch between continuous nebulization and inhalation-based nebulization modes. For example, if the current nebulization mode is inhalation-based nebulization, controlling the button switch S1 can disconnect the sampling module 10 from the main control module 20, thus preventing the sampling signal from affecting the control mode of the main control module 20. Simultaneously, the main control module 20 continuously outputs control signals to drive the nebulizer pad, thereby switching the nebulization mode to continuous nebulization.

[0099] Through the above technical solution, the sampling module 10 generates a sampling signal when it detects the patient's inhalation and outputs the sampling signal to the main control module 20. After receiving the sampling signal, the main control module 20 generates a control signal to control the nebulization module to convert the power supply voltage into a high-frequency driving voltage to drive the nebulizer. The nebulization strategy is adjusted according to the patient's real-time breathing rhythm, delivering nebulizer to the patient when the patient inhales and stopping nebulizer delivery when the patient does not inhale. This can effectively prevent the patient from choking and improve the patient experience.

[0100] The above are merely exemplary embodiments of this disclosure and should not be construed as limiting the scope of this disclosure. Any equivalent changes and modifications made in accordance with the teachings of this disclosure shall still fall within the scope of this disclosure. Those skilled in the art will readily conceive of other embodiments of this disclosure upon considering the specification and practicing the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not described in this disclosure.

Claims

1. A nebulization control circuit for synchronized breathing rhythm, characterized in that, The circuit includes a sampling module, a main control module, an atomization module, and a power supply; the sampling module is connected to the main control module, the main control module is connected to the atomization module, and the power supply is connected to the sampling module, the main control module, and the atomization module respectively, for supplying power to the sampling module, the main control module, and the atomization module respectively; the atomization module is also connected to an atomizing plate. The sampling module is used to generate a sampling signal and output the sampling signal to the main control module. The sampling signal is generated by the sampling module when it detects the patient's inhalation action. The main control module is used to generate a control signal after receiving the sampling signal, and output the control signal to the atomization module; The atomizing module is used to boost the power supply voltage based on the control signal, and to resonate the boosted voltage to output a driving voltage, which is used to drive the atomizing plate to work. The atomization module includes an atomization power control unit, a boost unit, and a resonant drive unit; the atomization power control unit is connected to the main control module, the boost unit, and the power supply respectively; the resonant drive unit is connected to the boost unit and the main control module respectively; the control signal includes a first control signal and a second control signal; The atomizing power control unit is used to turn on the power supply voltage to the boost unit after receiving the first control signal; The boost unit is used to boost the power supply voltage to obtain the output voltage; The resonant driving unit is used to perform resonant processing on the output voltage based on the second control signal, and output the driving voltage. The atomizing power control unit includes a first MOSFET and a first resistor; The gate of the first MOS transistor is connected to the main control module, the source of the first MOS transistor is connected to the power supply, and the drain of the first MOS transistor is connected to the boost unit. The first end of the first resistor is connected to the gate of the first MOS transistor, and the second end of the first resistor is connected to the source of the first MOS transistor. The resonant drive unit includes a three-legged inductor, a fifth capacitor, a second MOSFET, a fourth resistor, and a fifth resistor; The first end of the three-legged inductor is connected to the boost unit, the second end of the three-legged inductor is connected to the first end of the fifth capacitor, and the third end of the three-legged inductor is connected to the second end of the fifth capacitor. The drain of the second MOSFET is connected to the second terminal of the three-pin inductor, the gate of the second MOSFET is connected to the first terminal of the fourth resistor, the second terminal of the fourth resistor is connected to the main control module, the source of the second MOSFET is connected to the first terminal of the fifth resistor, the second terminal of the fifth resistor is grounded, and the source of the second MOSFET is connected to the main control module.

2. The circuit according to claim 1, characterized in that, The boost unit includes a first capacitor, a second capacitor, a first inductor, a first diode, a third capacitor, a fourth capacitor, a DC boost chip, a second resistor, and a third resistor; The first terminal of the first capacitor is connected to the atomizing power control unit, and the second terminal of the first capacitor is grounded. The first terminal of the second capacitor is connected to the atomizing power control unit, and the second terminal of the second capacitor is grounded. The first end of the first inductor is connected to the atomizing power control unit, and the second end of the first inductor is connected to the switching pin of the DC boost chip. The positive terminal of the first diode is connected to the second terminal of the first inductor, and the negative terminal of the first diode is connected to the resonant driving unit. The first terminal of the third capacitor is connected to the negative terminal of the first diode, and the second terminal of the third capacitor is grounded. The first terminal of the fourth capacitor is connected to the negative terminal of the first diode, and the second terminal of the fourth capacitor is grounded. The first end of the second resistor is connected to the negative terminal of the first diode, and the second end of the second resistor is connected to the feedback pin of the DC boost chip. The first end of the third resistor is connected to the second end of the second resistor, and the second end of the third resistor is grounded; The enable pin of the DC-DC boost chip is connected to the negative terminal of the first diode, the power supply pin of the DC-DC boost chip is connected to the negative terminal of the first diode, and the ground pin of the DC-DC boost chip is grounded.

3. The circuit according to claim 1, characterized in that, The atomizing module also includes a DC isolation unit, which includes a sixth capacitor and a seventh capacitor. The first terminal of the sixth capacitor is connected to the first terminal of the fifth capacitor, and the second terminal of the sixth capacitor is connected to the first interface of the atomizing plate. The first terminal of the seventh capacitor is connected to the second terminal of the fifth capacitor, and the second terminal of the sixth capacitor is connected to the second interface of the atomizing plate.

4. The circuit according to claim 1, characterized in that, The circuit also includes a voltage regulator module, which is connected to both the power supply and the sampling module. The voltage regulator module is used to provide a stable DC voltage for the sampling module.

5. The circuit according to claim 4, characterized in that, The voltage regulator module includes a linear low-dropout regulator, an eighth capacitor, a ninth capacitor, and a tenth capacitor; The input port of the linear low dropout regulator is connected to the power supply, the output port of the linear low dropout regulator is connected to the sampling module, and the grounding port of the linear low dropout regulator is grounded. The first terminal of the eighth capacitor is connected to the power supply, and the second terminal of the eighth capacitor is grounded. The first terminal of the ninth capacitor is connected to the power supply, and the second terminal of the ninth capacitor is grounded. The first terminal of the tenth capacitor is connected to the power supply, and the second terminal of the tenth capacitor is grounded.

6. The circuit according to claim 1, characterized in that, The circuit also includes a button switching module; the button switching module is connected to the main control module. The button switching module is used to control the main control module to switch between a first mode and a second mode. The first mode is when the main control module continuously outputs the control signal to the atomizing module, and the second mode is when the main control module outputs the control signal to the atomizing module when it receives a sampling signal.

7. The circuit according to claim 6, characterized in that, The button switching module is a button switch; The first terminal of the push-button switch is connected to the main control module, and the second terminal of the push-button switch is grounded.

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