CN216210583U

CN216210583U - Portable atomizer control circuit

Info

Publication number: CN216210583U
Application number: CN202122550804.7U
Authority: CN
Inventors: 陈召辉; 朱杰; 高旭钊
Original assignee: Shijiazhuang Bozhen Pharmaceutical Technology Co ltd
Current assignee: Shijiazhuang Bozhen Pharmaceutical Technology Co ltd
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2022-04-05
Anticipated expiration: 2031-10-22

Abstract

The utility model relates to the technical field of medical equipment, and provides a portable atomizer control circuit which comprises a controller U3, an atomizing sheet WH1 and a battery BAT, wherein the controller U3 is connected with the atomizing sheet WH1 through a driving circuit, the driving circuit comprises an MOS (metal oxide semiconductor) tube Q2 and a sampling resistor R8, the atomizing sheet WH1 is connected with a VCC (voltage source) voltage source, the grid electrode of the MOS tube Q2 is connected with a controller U3 through a resistor R3, the drain electrode of the MOS tube Q2 is connected with a pin 2 of the atomizing sheet WH1, the source electrode of the MOS tube Q2 is grounded through the sampling resistor R8, and the far-end of the sampling resistor R8 is connected with the controller U3 after being connected with the resistor R6 in series. Through setting up sampling resistance R8, export AD2 signal through resistance R6 after will atomizing piece operating voltage sampling, controller U3 carries out the frequency sweep through judging AD 2's voltage signal, confirms the resonant frequency of atomizing piece WH1, revises the duty cycle of PWM signal, makes it and atomizing piece WH1 produce resonance, improves the atomization effect.

Description

Portable atomizer control circuit

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a portable atomizer control circuit.

Background

The atomization therapy is suitable for symptoms such as rhinitis, cold and the like, and the traditional spray type atomizer supplies oxygen by using bottled oxygen and a center, takes the oxygen as power, and atomizes and inhales the oxygen by using the oxygen, and is generally used in hospitals. Nebulization requires a daily rush to the hospital, cross-contamination in the treatment room, and a significant amount of waiting time. And the volume is large, thus being inconvenient to carry and use.

SUMMERY OF THE UTILITY MODEL

The utility model provides a portable atomizer control circuit, the whole control circuit is powered by a battery, the drive circuit is used for controlling the atomizing sheet to spray mist, fewer components are adopted, and the packaging volume is small. The problem of among the prior art atomizer volume great, be difficult for carrying the use is solved.

The technical scheme of the utility model is as follows:

portable atomizer control circuit, including controller U3, atomizing piece WH1 and battery BAT, the VCC voltage source is exported to the battery BAT, connect through drive circuit between controller U3 and the atomizing piece WH1, drive circuit includes MOS pipe Q2 and sampling resistance R8, VCC voltage source is connected to 1 foot and 2 feet of atomizing piece WH1, MOS pipe Q2's grid passes through resistance R3 and connects controller U3, MOS pipe Q2's drain electrode is connected 2 feet of atomizing piece WH1, MOS pipe Q2's source passes through sampling resistance R8 ground connection, sampling resistance R8's far-end series resistance R6 back is as drive circuit's feedback output connection controller U3, the feedback output passes through electric capacity C2 ground connection.

Further, drive circuit still includes three-pin inductance L1, three-pin inductance L1 is in series between VCC voltage source and atomizing piece WH1, VCC voltage source is connected to three-pin inductance L1's input, two output of three-pin inductance L1 are connected 1 foot and 2 feet of atomizing piece WH 1.

Further, controller U3 still is connected with breathes detection circuitry, breathe detection circuitry includes steady voltage chip U1 and gas pressure sensor U2, VCC voltage source is connected to steady voltage chip U1's input, and the output is connected gas pressure sensor U2's power supply foot VDD, gas pressure sensor U2's output foot OUT is connected controller U3.

Further, the utility model further comprises a switching circuit, the switching circuit comprises a switch key SW1, a triode Q3, a double diode D1 and a MOS tube Q1, a base of the triode Q3 is used as an input end of the switching circuit and connected with the controller U3, an emitter of the triode Q3 is grounded, a collector of the triode Q3 is connected with a first anode of the double diode D1, a second anode of the double diode D1 is used as a detection end of the switching circuit and connected with the controller U3, a common cathode of the double diode D1 is connected in series with the switch key SW1 and then grounded, a collector of the triode Q3 is connected with a gate of the MOS tube Q1, a source of the MOS tube Q1 is connected with the battery BAT, and a drain of the MOS tube Q1 outputs a VCC voltage source.

Further, the VCC power still loops through divider resistance R4, R7 back ground connection, the tie point series resistance R9 of resistance R4 and resistance R7 is back as gathering output connection controller U3, it still passes through electric capacity C3 ground connection to gather the output.

Further, controller U3 still is connected with alarm circuit, alarm circuit includes BEE calling organ BEE1 and triode Q4, triode Q4's base is connected controller U3, triode Q4's emitter ground, BEE calling organ BEE 1's negative pole is connected to triode Q4's collecting electrode, and 3.3V voltage source is connected through resistance R11 to BEE calling organ BEE 1's positive pole, still parallelly connected electric capacity C9 between BEE calling organ BEE 1's positive pole and the negative pole.

Further, battery BAT is connected with the management circuit that charges, the management circuit that charges includes lithium cell charging chip U4 and USB interface, the USB interface is used for external charging wire, the output pin VBUS of USB interface connects lithium cell charging chip U4's input pin VCC, lithium cell charging chip U4's output pin BAT is connected the positive pole of battery BAT, the output pin VBUS of USB interface and lithium cell charging chip U4's output pin BAT are respectively through electric capacity C11 and electric capacity C10 ground connection.

The working principle and the beneficial effects of the utility model are as follows:

the controller U3 controls the working state of the atomizing plate WH1 through a driving circuit, L1 is a three-pin boosting inductor, the controller U3 sends a PWM signal to the base electrode of the MOS tube Q2, and a VCC voltage source is added to the atomizing plate at the PWM frequency by controlling the on-off of the Q2 to excite fog. The whole control circuit is powered by a battery BAT, the atomization sheet is controlled to fog through the driving circuit, fewer components are adopted, and the packaging size is small. Through setting up sampling resistance R8, pass through resistance R6 output AD2 signal after the operating voltage sampling, controller U3 carries out the frequency sweep through the voltage signal of judgement AD2, confirms the resonant frequency of atomizing piece WH1, revises the duty cycle of PWM signal, makes it produce resonance with atomizing piece WH1, improves the atomization effect.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a functional block diagram of the present invention;

FIG. 2 is a circuit diagram of a driving circuit according to the present invention;

FIG. 3 is a circuit diagram of the controller U3 according to the present invention;

FIG. 4 is a circuit diagram of a breath detection circuit of the present invention;

FIG. 5 is a circuit diagram of the switching circuit of the present invention;

FIG. 6 is a circuit diagram of the alarm circuit of the present invention;

FIG. 7 is a circuit diagram of an LED display circuit according to the present invention;

fig. 8 is a circuit diagram of a charge management circuit according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive step, are intended to be within the scope of the present invention.

Example 1

As shown in fig. 1 to 3, the present embodiment proposes a portable nebulizer control circuit,

portable atomizer control circuit, including controller U3, atomizing piece WH1 and battery BAT, the VCC voltage source is exported to the battery BAT, connect through drive circuit between controller U3 and the atomizing piece WH1, drive circuit includes MOS pipe Q2 and sampling resistor R8, VCC voltage source is connected to 1 foot and 2 feet of atomizing piece WH1, the gate of MOS pipe Q2 passes through resistance R3 and connects controller U3, 2 feet of atomizing piece WH1 are connected to the drain-source resistance of MOS pipe Q2, the source of MOS pipe Q2 passes through sampling resistor R8 ground connection, the feedback output who is drive circuit behind the far-end series resistance R6 of sampling resistor R8 connects controller U3, the feedback output passes through electric capacity C2 ground connection.

The controller U3 controls the working state of the atomizing plate WH1 through the driving circuit, the controller U3 sends PWM signals to the base electrode of the MOS tube Q2, and the VCC voltage source is added to the atomizing plate at the PWM frequency through controlling the on-off of the Q2 to excite the fog. R8 is a sampling resistor, an AD2 signal is output through a resistor R6 after sampling, frequency sweep is carried out by judging a voltage signal of AD2 through a controller U3, the resonant frequency of the atomizing plate is determined, the duty ratio of a PWM signal is corrected, the PWM signal and the atomizing plate WH1 generate resonance, and the atomizing effect is improved. Meanwhile, whether the liquid medicine is remained or not can be detected through the signal, and when the liquid medicine is used up, a PW2 low-level signal is output to stop the work of the atomizing plate WH 1.

Further, in the present invention,

the drive circuit further comprises a three-pin inductor L1, wherein the three-pin inductor L1 is connected in series between a VCC voltage source and an atomization piece WH1, the input end of the three-pin inductor L1 is connected with the VCC voltage source, and two output ends of the three-pin inductor L1 are connected with a pin 1 and a pin 2 of the atomization piece WH 1.

L1 is a three-pin step-up inductor, also called autotransformer, a transformer with only one winding. When used as a step-up transformer, the applied voltage is applied to only a portion of the turns of the winding. The part of the windings belonging to the primary and the secondary are generally called as the common winding, the rest part is called as the series winding, the autotransformer with the same capacity has small size and high efficiency compared with the common transformer, and the larger the capacity of the transformer is, the higher the voltage is, and the more outstanding the advantage is.

Further, as shown in FIG. 4,

the controller U3 still is connected with the breathing detection circuitry in this embodiment, and the breathing detection circuitry includes steady voltage chip U1 and gas pressure sensor U2, and VCC voltage source is connected to steady voltage chip U1's input, and the power supply foot VDD of gas pressure sensor U2 is connected to the output, and controller U3 is connected to gas pressure sensor U2's output foot OUT.

The VCC voltage source outputs 3.3V to supply power to the gas pressure sensor U2 through the voltage stabilizing chip U1, and meanwhile, the supply voltage of the controller U3 and the buzzer BEE1 also adopts a 3.3V voltage source. The gas pressure sensor U3 detects the exhalation signal of human body, converts the signal into electric signal and outputs the electric signal to the controller U3, and the breath detection aims to atomize when the inhalation action is detected. Mist is generated synchronously with breathing, mist is generated when breathing in, and mist generation is stopped when breathing out. Save the liquid medicine, avoid most medicine fog to discharge to the external environment along with exhaling the action. Meanwhile, the problem of choking cough caused by too large fog amount in direct injection is avoided.

Further, as shown in FIG. 5,

the power supply circuit further comprises a switching circuit, the switching circuit comprises a switch key SW1, a triode Q3, a double diode D1 and a MOS tube Q1, the base electrode of the triode Q3 is used as the input end of the switching circuit and connected with the controller U3, the emitter electrode of the triode Q3 is grounded, the collector electrode of the triode Q3 is connected with the first anode of the double diode D1, the second anode of the double diode D1 is used as the detection end of the switching circuit and connected with the controller U3, the common cathode of the double diode D1 is connected with the switch key SW1 in series and then grounded, the collector electrode of the triode Q3 is connected with the grid electrode of the MOS tube Q1, the source electrode of the MOS tube Q1 is connected with a battery BAT, and the drain electrode of the MOS tube Q1 outputs a VCC voltage source.

The starting process comprises the following steps:

the switch key SW1 is a non-self-locking key, when the switch key SW1 is pressed, the two diodes of the double diode D1 are all conducted, and the switch control unit forms a loop of BAT → R1 → D1 → SW1 → GND. The conduction voltage drop of the double diode D1 is calculated according to 0.7, VS of the MOS tube Q1 is greater than VG, Q1 is conducted to form a BAT → Q1 → VCC loop, power supply is started, after the controller U3 is electrified, a high level is output to P _ CTRL, the triode Q3 is conducted, the grid electrode of the MOS tube Q1 is grounded through the triode Q3, at the moment, the switch key SW1 is released, the conduction condition of the MOS tube Q1 is not changed, and the circuit still works normally.

Shutdown process:

during normal operation of the system, SW1 is a detection signal of controller U3.

When the button SW1 is pressed, under the action of D1, SW1 is at low level, and after the controller U3 detects that the level of the pin changes, the P _ CTRL pin outputs low level to turn off Q3, so as to disconnect the path of Q1 gate → Q3 → GND, but at this time, because the switch button SW1 is in a pressed state, the gate of the MOS transistor Q1 can still be kept at low level, and the system still works normally. In this state, when the switch key SW1 is released, the two paths of gate ground paths of the MOS transistor Q1 are all disconnected, VG is VS under the pull-up action of R1, the on condition cannot be formed, the MOS transistor Q1 is turned off, the whole system is powered off, and the shutdown operation is completed.

Further, in the present invention,

in this embodiment, the VCC power supply is grounded after passing through the voltage dividing resistors R4 and R7, a connection point between the resistor R4 and the resistor R7 is connected in series with the resistor R9 and then connected to the controller U3 as an acquisition output, and the acquisition output is grounded through the capacitor C3.

After the resistor R4 and the resistor R7 divide the voltage of a VCC voltage source, the acquired signal is output to the controller U3 through the resistor R9 for analog-to-digital conversion and post-processing analysis, whether the electric quantity is lower than a set threshold value at the moment is judged, and when the electric quantity is lower than the set threshold value, the electric quantity is judged to be insufficient, and the controller U3 takes corresponding measures.

Further, as shown in FIG. 6,

in this embodiment, the controller U3 is further connected with an alarm circuit, the alarm circuit includes a buzzer be 1 and a triode Q4, a base of the triode Q4 is connected with the controller U3, an emitter of the triode Q4 is grounded, a collector of the triode Q4 is connected with a cathode of the buzzer be 1, an anode of the buzzer be 1 is connected with a 3.3V voltage source through a resistor R11, and a capacitor C9 is further connected in parallel between the anode and the cathode of the buzzer be 1.

When the controller U3 detects the signal of gathering output and judges that the battery power is not enough, output high level signal to triode Q4, drive triode Q4 and switch on, further buzzer BEE1 switches on, the sound production is reported to the police. Wherein the capacitor C9 plays a filtering role.

Meanwhile, the buzzer BEE1 in the embodiment is also used for liquid medicine alarm, and when the controller U3 detects that the liquid medicine is insufficient, the buzzer BEE1 is driven to sound through the same control method. The liquid medicine alarm or the battery alarm is distinguished through the LED display circuit,

as shown in fig. 7, when the power is insufficient, the controller U3 outputs ALARM signal and G _ LED signal at high level, at which time the light emitting diode D4 emits green light and the buzzer BEE1 sounds; when the liquid medicine is insufficient, the controller U3 outputs ALARM signal and B _ LED signal at high level, at which time the light emitting diode D5 emits blue light and the buzzer BEE1 sounds.

Further, as shown in FIG. 8,

the charging management circuit further comprises a charging management circuit, the charging management circuit comprises a lithium battery charging chip U4 and a USB interface, the USB interface is used for externally connecting a charging wire, an output pin VBUS of the USB interface is connected with an input pin VCC of the lithium battery charging chip U4, an output pin BAT of the lithium battery charging chip U4 is connected with a positive electrode of a battery BAT, and the output pin VBUS of the USB interface and the output pin BAT of the lithium battery charging chip U4 are grounded through a capacitor C11 and a capacitor C10 respectively.

During charging, the battery BAT is charged through the external data line of the USB interface, and the 5V voltage is processed by the lithium battery charging chip U4 and then is linearly charged.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Portable atomizer control circuit, including controller U3, atomizing piece WH1 and battery BAT, the VCC voltage source is exported to the battery BAT, its characterized in that, connect through drive circuit between controller U3 and the atomizing piece WH1, drive circuit includes MOS pipe Q2 and sampling resistance R8, VCC voltage source is connected to 1 foot and 2 feet of atomizing piece WH1, MOS pipe Q2's grid passes through resistance R3 and connects controller U3, MOS pipe Q2's drain-source connection the 2 feet of atomizing piece WH1, MOS pipe Q2's source passes through sampling resistance R8 ground connection, the far-end series resistance R6 back of sampling resistance R8 is as drive circuit's feedback output connection controller U3, the feedback output passes through electric capacity C2 ground connection.

2. The portable atomizer control circuit according to claim 1, wherein said driving circuit further comprises a three-pin inductor L1, said three-pin inductor L1 is connected in series between said VCC voltage source and an atomization pad WH1, an input terminal of said three-pin inductor L1 is connected to said VCC voltage source, and two output terminals of said three-pin inductor L1 are connected to pin 1 and pin 2 of said atomization pad WH 1.

3. The portable nebulizer control circuit of claim 1, wherein the controller U3 is further connected with a breath detection circuit, the breath detection circuit comprises a voltage stabilization chip U1 and a gas pressure sensor U2, an input terminal of the voltage stabilization chip U1 is connected to a VCC voltage source, an output terminal of the voltage stabilization chip U1 is connected to a power supply pin VDD of the gas pressure sensor U2, and an output pin OUT of the gas pressure sensor U2 is connected to the controller U3.

4. The portable nebulizer control circuit of claim 1, further comprising a switch circuit, wherein the switch circuit comprises a switch button SW1, a transistor Q3, a dual diode D1 and a MOS transistor Q1, a base of the transistor Q3 is connected to the controller U3 as an input terminal of the switch circuit, an emitter of the transistor Q3 is grounded, a collector of the transistor Q3 is connected to a first anode of the dual diode D1, a second anode of the dual diode D1 is connected to the controller U3 as a detection terminal of the switch circuit, a common cathode of the dual diode D1 is grounded after being connected in series with the switch button SW1, a collector of the transistor Q3 is connected to a gate of the MOS transistor Q1, a source of the MOS transistor Q1 is connected to the battery BAT, and a drain of the MOS transistor Q1 outputs VCC.

5. The portable atomizer control circuit of claim 4 wherein the VCC voltage source is further grounded through voltage divider resistors R4, R7 in sequence, the junction between the resistor R4 and the resistor R7 is connected in series with the resistor R9 and then connected as the acquisition output to the controller U3, and the acquisition output is further grounded through a capacitor C3.

6. The portable atomizer control circuit according to claim 5, wherein an alarm circuit is further connected to the controller U3, the alarm circuit comprises a buzzer BEE1 and a triode Q4, the base of the triode Q4 is connected to the controller U3, the emitter of the triode Q4 is grounded, the collector of the triode Q4 is connected to the cathode of the buzzer BEE1, the anode of the buzzer BEE1 is connected to a 3.3V voltage source through a resistor R11, and a capacitor C9 is further connected in parallel between the anode and the cathode of the buzzer BEE 1.

7. The portable atomizer control circuit of claim 1, wherein the battery BAT is connected to a charge management circuit, the charge management circuit comprises a lithium battery charging chip U4 and a USB interface, the USB interface is used for externally connecting a charging wire, an output pin VBUS of the USB interface is connected to an input pin VCC of the lithium battery charging chip U4, an output pin BAT of the lithium battery charging chip U4 is connected to the positive electrode of the battery BAT, and the output pin VBUS of the USB interface and the output pin BAT of the lithium battery charging chip U4 are grounded through a capacitor C11 and a capacitor C10, respectively.