Control circuit with milk sucking and nose sucking functions

Abstract

The invention belongs to the technical field of electronic control, and relates to a control circuit with milk sucking and nose sucking functions, which comprises an MCU (Microprogrammed Control Unit), and a battery charging management and detection circuit, a booster circuit, a pump valve switching circuit, an LED (Light Emitting Diode) display circuit, a key detection circuit and an encoder detection circuit which are electrically connected with the MCU, the MCU is used for controlling the battery charging management and detection circuit, the booster circuit, the pump valve switching circuit, the LED display circuit, the key detection circuit and the encoder detection circuit, the battery charging management and detection circuit is used for detecting external power supply input and carrying out charging management on a battery, and the booster circuit is used for boosting management. The pump valve switching circuit is used for controlling opening and closing of a pump valve, the LED display circuit is used for displaying different numbers and patterns, the key detection circuit is used for detecting the key state, and the encoder detection circuit is used for detecting the working state of an encoder. Accurate control over the milk sucking process and the nose sucking process is achieved, and high efficiency, safety and usability are achieved.

Description

Technical Field

[0001] The present invention relates to the field of electronic control technology, and more particularly, to a control circuit with milk sucking and nose sucking functions. Background Art

[0002] The existing breast pumps in the prior art are mainly divided into two categories: manual type and electric type. The manual breast pumps include the pressing type, the simple rubber ball sucking method and the syringe type. They are easy to operate but have relatively low efficiency, and long-term use may cause hand fatigue. The electric breast pumps are widely welcomed for their high efficiency and convenience, and are divided into various types such as those that can stimulate milk let-down and those that cannot, single pump, double pump and wearable types.

[0003] However, the existing breast pumps still have some defects. First, the designs of some breast pumps are not user-friendly enough, which are likely to cause discomfort or even pain during the milk sucking and nose sucking processes, affecting milk secretion. Second, some electric breast pumps produce relatively loud noises during operation, which may affect the rest of the mother and the baby, especially when used at night. In addition, some breast pumps are relatively large in size and not convenient to carry, which is not friendly to mothers who need to go out frequently. Summary of the Invention

[0004] In view of the above-mentioned defects of the prior art, the present invention provides a control circuit with milk sucking and nose sucking functions, including:

[0005] An MCU, a battery charging management and detection circuit, a boost circuit, a pump valve switch circuit, an LED display circuit, a key detection circuit, and an encoder detection circuit electrically connected to the MCU. The MCU is used to control the battery charging management and detection circuit, the boost circuit, the pump valve switch circuit, the LED display circuit, the key detection circuit, and the encoder detection circuit. The battery charging management and detection circuit is used to detect the external power input and manage the charging of the battery. The boost circuit is used for boost management. The pump valve switch circuit is used to control the opening and closing of the pump valve. The LED display circuit is used to display different numbers and patterns. The key detection circuit is used to detect the key state. The encoder detection circuit is used to detect the working state of the encoder.

[0006] Preferably, the MCU includes: CA51 F005T3.

[0007] Preferably, the battery charging management and detection circuit includes: Pin 1 of the battery charging chip U1 is respectively connected to Pin 3 of the battery charging chip U1, Pin 9 of the battery charging chip U1 and grounded; Pin 2 of the battery charging chip U1 is connected to one end of the resistor R4, and the other end of the resistor R4 is grounded; Pin 5 of the battery charging chip U1 is respectively connected to one end of the capacitor C1 and Pin 1 of the lithium battery B1, and the other end of the capacitor C1 is grounded; Pin 4 of the battery charging chip U1 is respectively connected to one end of the resistor R2 and one end of the capacitor C2, the other end of the resistor R2 is respectively connected to Pin 8 of the battery charging chip U1, the positive electrode of the diode D88, one end of the resistor R1 and Pin 1 of the connection terminal CON1; the other end of the capacitor C2 is grounded; the other end of the resistor R1 is respectively connected to one end of the resistor R3 and the negative electrode of the zener diode ZD1; the other end of the resistor R3 and the positive electrode of the zener diode ZD1 are both grounded.

[0008] Preferably, the boost circuit includes: Pin 1 of the boost converter U2 is respectively connected to the positive electrode of the diode D38 and one end of the inductor L1; Pin 3 of the boost converter U2 is respectively connected to one end of the resistor R21 and one end of the resistor R20, the other end of the resistor R20 is connected to the collector of the triode Q1, the base of the triode Q1 is connected to one end of the resistor R12, and the emitter of the triode Q1 is grounded; the other end of the inductor L1 is respectively connected to one end of the capacitor C3, Pin 5 of the boost converter U2 and one end of the capacitor C11; Pin 4 of the boost converter U2 is connected to one end of the resistor R5; Pin 6 of the boost converter U2 is connected to one end of the resistor R6.

[0009] Preferably, the pump valve switch circuit includes: Pin 1 of the connection terminal CON2 is respectively connected to the positive electrode of the diode D39 and the collector of the triode Q2; Pin 2 of the connection terminal CON2 is connected to the negative electrode of the diode D39; Pin 3 of the connection terminal CON2 is respectively connected to the negative electrode of the diode D40 and Pin 2 of the connection terminal CON3; the positive electrode of the diode D40 is respectively connected to Pin 1 of the connection terminal CON3 and the collector of the triode Q5; Pin 3 of the connection terminal CON3 is respectively connected to the negative electrode of the diode D41 and Pin 1 of the connection terminal CON4; the positive electrode of the diode D41 is respectively connected to Pin 2 of the connection terminal CON4 and the collector of the triode Q7; the base of the triode Q7 is respectively connected to one end of the resistor R11 and one end of the resistor R22; the base of the triode Q5 is respectively connected to one end of the resistor R9 and one end of the resistor R10; the base of the triode Q2 is respectively connected to one end of the resistor R7 and one end of the resistor R8.

[0010] Preferably, the key detection circuit includes: One end of the resistor R18 is connected to one end of the key K1, the other end of the key K1 is connected to one end of the key K2, and the other end of the key K2 is connected to one end of the resistor R19.

[0011] Preferably, the encoder detection circuit includes: one end of resistor R24 is connected to one end of resistor R25, the other end of resistor R24 is respectively connected to one end of resistor R14 and one end of capacitor C5, the other end of capacitor C5 is grounded, the other end of resistor R25 is connected to one end of resistor R23, the other end of resistor R23 is connected to one end of capacitor C6, the base of transistor Q6 is connected to one end of resistor R13, the emitter of transistor Q6 is grounded, and the collector of transistor Q6 is connected to pin 3 of connection terminal CON5.

[0012] Preferably, the LED display circuit includes a first LED display circuit, a second LED display circuit, a third LED display circuit, and a fourth LED display circuit.

[0013] Preferably, the first LED display circuit includes: the cathode of diode D1 is respectively connected to the cathodes of diode D2, diode D3, diode D4, diode D5, diode D6, and diode D7.

[0014] Preferably, the second LED display circuit includes: the cathode of diode D8 is respectively connected to the cathodes of diode D9, diode D10, diode D11, diode D12, diode D13, and diode D14.

[0015] Implementing the control circuit with milk sucking and nose sucking functions of the present invention has the following beneficial effects: by setting an MCU, a battery charging management and detection circuit, a boost circuit, a pump valve switch circuit, an LED display circuit, a key detection circuit, and an encoder detection circuit electrically connected to the MCU, the MCU is used to control the battery charging management and detection circuit, the boost circuit, the pump valve switch circuit, the LED display circuit, the key detection circuit, and the encoder detection circuit. The battery charging management and detection circuit is used to detect the external power input and manage the charging of the battery. The boost circuit is used for boost management. The pump valve switch circuit is used to control the opening and closing of the pump valve. The LED display circuit is used to display different numbers and patterns. The key detection circuit is used to detect the key state. The encoder detection circuit is used to detect the working state of the encoder. The LED display screen can display information such as the current working mode, power status, and suction level in real time, making it clear at a glance for the user. Under the unified scheduling of the MCU, they work together to jointly achieve precise control of the milk sucking and nose sucking processes. From battery management to voltage conversion, to pump valve switching and user interaction, every link is closely connected, ensuring the high efficiency, safety, and usability of the control circuit with milk sucking and nose sucking functions. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings. The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0017] Figure 1 is the connection block diagram of the control circuit of the present invention with milk sucking and nose sucking functions;

[0018] Figure 2 is the circuit diagram of the battery charging management and detection circuit in the control circuit of the present invention with milk sucking and nose sucking functions;

[0019] Figure 3 is the circuit diagram of the boost circuit in the control circuit of the present invention with milk sucking and nose sucking functions;

[0020] Figure 4 is the circuit diagram of the pump valve switch circuit in the control circuit of the present invention with milk sucking and nose sucking functions;

[0021] Figure 5 is the circuit diagram of the key detection circuit in the control circuit of the present invention with milk sucking and nose sucking functions;

[0022] Figure 6 is the circuit diagram of the encoder detection circuit in the control circuit of the present invention with milk sucking and nose sucking functions.

[0023] Figure 7 is the circuit diagram of the first LED display circuit in the control circuit of the present invention with milk sucking and nose sucking functions;

[0024] Figure 8 is the circuit diagram of the second LED display circuit in the control circuit of the present invention with milk sucking and nose sucking functions;

[0025] Figure 9 is the circuit diagram of the third LED display circuit in the control circuit of the present invention with milk sucking and nose sucking functions;

[0026] Figure 10 is the circuit diagram of the fourth LED display circuit in the control circuit of the present invention with milk sucking and nose sucking functions. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0028] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0030] Please refer to Figure 1 , which is a connection block diagram of a control circuit with milk sucking and nose sucking functions according to the present invention. As Figure 1 shown, in the control circuit with milk sucking and nose sucking functions provided in the first embodiment of the present invention, it at least includes an MCU, a battery charging management and detection circuit, a boost circuit, a pump valve switch circuit, an LED display circuit, a key detection circuit, and an encoder detection circuit electrically connected to the MCU. The MCU is used to control the battery charging management and detection circuit, the boost circuit, the pump valve switch circuit, the LED display circuit, the key detection circuit, and the encoder detection circuit. The battery charging management and detection circuit is used to detect the external power input and manage the charging of the battery. The boost circuit is used for boost management. The pump valve switch circuit is used to control the opening and closing of the pump valve. The LED display circuit is used to display different numbers and patterns. The key detection circuit is used to detect the key state. The encoder detection circuit is used to detect the working state of the encoder.

[0031] In specific implementation, the MCU includes but is not limited to: CA51 F005T3. CA51 F005T3 is a high-performance 8-bit microcontroller based on the 1T8051 core, with many remarkable features. Its operating speed is 10 times faster than that of traditional 8051 chips, greatly improving the processing efficiency and being suitable for application scenarios with high speed requirements. The chip is built-in with 64K Flash program memory and 4K bytes of SRAM, providing users with sufficient programming and data storage space, supporting multiple repeated erasures and writings, and having high flexibility.

[0032] CA51 F005T3 integrates rich functional modules, including 16Bit PWM, 12Bit ADC, UART, I 2 C, RGB_LED, Touch Key controller, and low voltage detection (LVD), etc., which can meet various complex control requirements. Among them, PWM supports 8-channel configuration and is suitable for scenarios such as motor control; ADC supports 12-bit high-precision sampling and is suitable for applications that require high-precision measurement.

[0033] In addition, the chip also supports three power-saving modes: IDLE, STOP, and low-speed operation, which can adjust the power consumption according to application requirements and improve energy efficiency. At the same time, its strong anti-interference performance and rich peripheral interfaces, such as GPIO, SPI, I2C, etc., enable it to be widely used in fields such as industrial control, household lighting, small household appliances, and sports equipment.

[0034] Figure 2 It is the circuit diagram of the battery charging management and detection circuit in the control circuit of the present invention with milk sucking and nose sucking functions. As Figure 2 shown, the battery charging management and detection circuit includes: Pin 1 of the battery charging chip U1 is respectively connected to Pin 3 of the battery charging chip U1, Pin 9 of the battery charging chip U1 and grounded; Pin 2 of the battery charging chip U1 is connected to one end of the resistor R4, and the other end of the resistor R4 is grounded; Pin 5 of the battery charging chip U1 is respectively connected to one end of the capacitor C1 and Pin 1 of the lithium battery B1, and the other end of the capacitor C1 is grounded; Pin 4 of the battery charging chip U1 is respectively connected to one end of the resistor R2 and one end of the capacitor C2, the other end of the resistor R2 is respectively connected to Pin 8 of the battery charging chip U1, the positive pole of the diode D88, one end of the resistor R1, and Pin 1 of the connection terminal CON1, the other end of the capacitor C2 is grounded; the other end of the resistor R1 is respectively connected to one end of the resistor R3 and the negative pole of the zener diode ZD1, and the other end of the resistor R3 and the positive pole of the zener diode ZD1 are both grounded.

[0035] During specific implementation, the battery charging chip U1 can be, but is not limited to, TC4056A, etc. In this embodiment, TC4056A is adopted. TC4056A is a single-cell lithium-ion battery charger that uses a constant current / constant voltage algorithm. It can provide a charging current of 700 mA (with the help of a well-thermally designed PCB layout) and an internal P-channel power MOSFET and thermal regulation circuit. When an external power adapter is inserted into the machine, the power input can be detected by the MCU and the battery can be charged. The battery charging management and detection circuit is responsible for monitoring the battery status, including key parameters such as battery level, voltage, and temperature. When the battery power is insufficient, the battery charging chip U1 automatically starts to charge the battery through the adapter and stops after it is fully charged to prevent overcharging. At the same time, it can also feedback the battery status to the MCU in real time to ensure stable and reliable power supply during the milk sucking and nasal aspiration processes.

[0036] Figure 3 It is the circuit diagram of the boost circuit in the control circuit of the present invention with milk sucking and nasal aspiration functions. As Figure 3 shown, the boost circuit includes: Pin 1 of the boost converter U2 is respectively connected to the positive pole of the diode D38 and one end of the inductor L1. Pin 3 of the boost converter U2 is respectively connected to one end of the resistor R21 and one end of the resistor R20. The other end of the resistor R20 is connected to the collector of the triode Q1. The base of the triode Q1 is connected to one end of the resistor R12. The emitter of the triode Q1 is grounded. The other end of the inductor L1 is respectively connected to one end of the capacitor C3, Pin 5 of the boost converter U2, and one end of the capacitor C11. Pin 4 of the boost converter U2 is connected to one end of the resistor R5. Pin 6 of the boost converter U2 is connected to one end of the resistor R6.

[0037] During specific implementation, the boost converter U2 can be, but is not limited to, FP6291, etc. In this embodiment, FP6291 is selected. FP6291 is a current-mode boost converter. The MCU controls the boost enable pin of FP6291 to control whether FP6291 outputs a boosted voltage. The boost circuit is responsible for converting the low voltage provided by the battery (such as 3.7 V) into the high voltage required to drive the pump valve (such as 5 V) to meet the strong suction requirements of the milk sucking pump. This conversion process is precisely controlled by the MCU to ensure stable voltage and compliance with safety standards.

[0038] Figure 4 It is the circuit diagram of the pump valve switch circuit in the control circuit of the present invention with milk sucking and nasal aspiration functions. As Figure 4As shown in the figure, the pump valve switch circuit includes: Pin 1 of connection terminal CON2 is respectively connected to the positive electrode of diode D39 and the collector of triode Q2. Pin 2 of connection terminal CON2 is connected to the negative electrode of diode D39. Pin 3 of connection terminal CON2 is respectively connected to the negative electrode of diode D40 and Pin 2 of connection terminal CON3. The positive electrode of diode D40 is respectively connected to Pin 1 of connection terminal CON3 and the collector of triode Q5. Pin 3 of connection terminal CON3 is respectively connected to the negative electrode of diode D41 and Pin 1 of connection terminal CON4. The positive electrode of diode D41 is respectively connected to Pin 2 of connection terminal CON4 and the collector of triode Q7. The base of triode Q7 is respectively connected to one end of resistor R11 and one end of resistor R22. The base of triode Q5 is respectively connected to one end of resistor R9 and one end of resistor R10. The base of triode Q2 is respectively connected to one end of resistor R7 and one end of resistor R8.

[0039] The MCU controls the start and stop of the pump valve by controlling the switches of triode Q2, triode Q5 and triode Q7. The pump valve switch circuit directly controls the opening and closing of the milk suction pump and the solenoid valve, and adjusts the suction force and frequency according to the instructions of the MCU. During the milk suction and nose suction processes, the MCU obtains the user input through the encoder detection circuit according to the modes (such as lactation promotion, milk suction, massage, etc.) and gears set by the user, and then adjusts the pump valve switch circuit to achieve the best milk suction effect.

[0040] Figure 5 It is the circuit diagram of the key detection circuit in the control circuit of the present invention with milk suction and nose suction functions. As Figure 5 shown in the figure, the key detection circuit includes: One end of resistor R18 is connected to one end of key K1. The other end of key K1 is connected to one end of key K2. The other end of key K2 is connected to one end of resistor R19.

[0041] The MCU sets different states and outputs different levels through time-division multiplexing of corresponding pins, so that it can not only light up the corresponding LEDs to display different numbers and patterns, but also detect the corresponding key states and make corresponding logical processing. The key detection circuit captures the user's operation instructions, such as mode switching, gear adjustment, etc., and transmits these instructions to the MCU for processing.

[0042] Figure 6 It is the circuit diagram of the encoder detection circuit in the control circuit of the present invention with milk suction and nose suction functions. As Figure 6As shown in the figure, the encoder detection circuit includes: one end of resistor R24 is connected to one end of resistor R25, the other end of resistor R24 is respectively connected to one end of resistor R14 and one end of capacitor C5, the other end of capacitor C5 is grounded, the other end of resistor R25 is connected to one end of resistor R23, the other end of resistor R23 is connected to one end of capacitor C6, the base of transistor Q6 is connected to one end of resistor R13, the emitter of transistor Q6 is grounded, and the collector of transistor Q6 is connected to pin 3 of connection terminal CON5.

[0043] The MCU sets the corresponding pins to different states and outputs different levels, thereby detecting the forward and backward sliding of the encoder at different speeds and performing corresponding logical processing.

[0044] In specific implementation, in order to make the information displayed by human-computer interaction richer, the LED display circuit includes a first LED display circuit, a second LED display circuit, a third LED display circuit, and a fourth LED display circuit.

[0045] Figure 7 It is the circuit diagram of the first LED display circuit in the control circuit of the present invention with milk sucking and nose sucking functions. As Figure 7 shown, the first LED display circuit includes: the negative electrode of diode D1 is respectively connected to the negative electrodes of diode D2, diode D3, diode D4, diode D5, diode D6, diode D7.

[0046] Figure 8 It is the circuit diagram of the second LED display circuit in the control circuit of the present invention with milk sucking and nose sucking functions. As Figure 8 shown, the second LED display circuit includes: the negative electrode of diode D8 is respectively connected to the negative electrodes of diode D9, diode D10, diode D11, diode D12, diode D13, diode D14.

[0047] Figure 9 It is the circuit diagram of the third LED display circuit in the control circuit of the present invention with milk sucking and nose sucking functions. As Figure 9 shown, the third LED display circuit includes: the negative electrode of diode D15 is respectively connected to the negative electrodes of diode D16, diode D17, diode D18, diode D19, diode D20, diode D21.

[0048] Figure 10 It is the circuit diagram of the fourth LED display circuit in the control circuit of the present invention with milk sucking and nose sucking functions. As Figure 10As shown in the figure, the fourth LED display circuit includes: the negative electrodes of diodes D22 are respectively connected to the negative electrodes of diodes D23, D24, D25, D26, D27, and D28.

[0049] The MCU outputs different levels by controlling the corresponding pins to light up the corresponding LEDs, thereby displaying different numbers and patterns. The LED display circuit provides a user interaction interface. The LED display screen displays information such as the current working mode, power status, and suction gear in real time, making it clear at a glance for the user.

[0050] Through the design of the above embodiments of the present invention, its beneficial effects are as follows: By setting up the MCU, the battery charging management and detection circuit, boost circuit, pump valve switch circuit, LED display circuit, key detection circuit, and encoder detection circuit that are electrically connected to the MCU. The MCU is used to control the battery charging management and detection circuit, boost circuit, pump valve switch circuit, LED display circuit, key detection circuit, and encoder detection circuit. The battery charging management and detection circuit is used to detect the external power input and manage the charging of the battery. The boost circuit is used for boost management. The pump valve switch circuit is used to control the opening and closing of the pump valve. The LED display circuit is used to display different numbers and patterns. The key detection circuit is used to detect the key status. The encoder detection circuit is used to detect the working status of the encoder. The LED display screen displays information such as the current working mode, power status, and suction gear in real time, making it clear at a glance for the user. Under the unified scheduling of the MCU, they work together to jointly achieve the precise control of the milk sucking and nose sucking processes. From battery management to voltage conversion, then to pump valve switching and user interaction, every link is closely connected, ensuring the high efficiency, safety, and usability of the control circuit with milk sucking and nose sucking functions. The present invention is described according to specific embodiments, but those skilled in the art should understand that various changes and equivalent replacements can be made without departing from the scope of the present invention. In addition, many modifications can be made to the present invention without departing from its protection scope to adapt to the specific situation of the technology of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all embodiments falling within the protection scope of the claims.

Claims

1. A control circuit with milk suction and nasal suction functions, characterized in that: The invention comprises: an MCU, a battery charging management and detection circuit, a boost circuit, a pump valve switch circuit, an LED display circuit, a key detection circuit, and an encoder detection circuit electrically connected to the MCU, wherein the MCU is used to control the battery charging management and detection circuit, the boost circuit, the pump valve switch circuit, the LED display circuit, the key detection circuit, and the encoder detection circuit; the battery charging management and detection circuit is used to detect external power input and perform charging management on the battery; the boost circuit is used for boost management; the pump valve switch circuit is used to control the opening and closing of the pump valve; the LED display circuit is used to display different numbers and patterns; the key detection circuit is used to detect the key status; and the encoder detection circuit is used to detect the working status of the encoder.

2. The control circuit with milk suction and nasal suction functions according to claim 1, characterized in that: The MCU includes: CA51F005T3.

3. The control circuit with milk suction and nasal suction functions according to claim 1, characterized in that: The battery charging management and detection circuit includes: pin 1 of the battery charging chip U1 is respectively connected to pin 3 of the battery charging chip U1 and pin 9 of the battery charging chip U1 and is grounded, pin 2 of the battery charging chip U1 is connected to one end of the resistor R4, and the other end of the resistor R4 is grounded, pin 5 of the battery charging chip U1 is respectively connected to one end of the capacitor C1 and pin 1 of the lithium battery B1, and the other end of the capacitor C1 is grounded, pin 4 of the battery charging chip U1 is respectively connected to one end of the resistor R2 and one end of the capacitor C2, and the other end of the resistor R2 is respectively connected to pin 8 of the battery charging chip U1, the positive electrode of the diode D88, one end of the resistor R1, and pin 1 of the connecting terminal CON1, the other end of the capacitor C2 is grounded, and the other end of the resistor R1 is respectively connected to one end of the resistor R3 and the negative electrode of the voltage-stabilizing diode ZD1, and the other end of the resistor R3 and the positive electrode of the voltage-stabilizing diode ZD1 are both grounded.

4. The control circuit with milk suction and nasal suction functions according to claim 1, characterized in that: The boost circuit includes: pin 1 of the boost converter U2 is respectively connected to the positive electrode of the diode D38 and one end of the inductor L1, pin 3 of the boost converter U2 is respectively connected to one end of the resistor R21 and one end of the resistor R20, the other end of the resistor R20 is connected to the collector of the transistor Q1, the base of the transistor Q1 is connected to one end of the resistor R12, the emitter of the transistor Q1 is grounded, the other end of the inductor L1 is respectively connected to one end of the capacitor C3, pin 5 of the boost converter U2, and one end of the capacitor C11, pin 4 of the boost converter U2 is connected to one end of the resistor R5, and pin 6 of the boost converter U2 is connected to one end of the resistor R6.

5. The control circuit with milk suction and nasal suction functions according to claim 1, characterized in that: The pump valve switch circuit includes: pin 1 of the connection terminal CON2 is respectively connected to the positive electrode of the diode D39 and the collector of the transistor Q2, pin 2 of the connection terminal CON2 is respectively connected to the negative electrode of the diode D39, pin 3 of the connection terminal CON2 is respectively connected to the negative electrode of the diode D40 and pin 2 of the connection terminal CON3, the positive electrode of the diode D40 is respectively connected to pin 1 of the connection terminal CON3 and the collector of the transistor Q5, pin 3 of the connection terminal CON3 is respectively connected to the negative electrode of the diode D41 and pin 1 of the connection terminal CON4, the positive electrode of the diode D41 is respectively connected to pin 2 of the connection terminal CON4 and the collector of the transistor Q7, the base of the transistor Q7 is respectively connected to one end of the resistor R11 and one end of the resistor R22, the base of the transistor Q5 is respectively connected to one end of the resistor R9 and one end of the resistor R10, and the base of the transistor Q2 is respectively connected to one end of the resistor R7 and one end of the resistor R8.

6. The control circuit with milk suction and nasal suction functions according to claim 1, characterized in that: The key detection circuit includes: one end of a resistor R18 is connected to one end of a key K1 , the other end of the key K1 is connected to one end of a key K2 , and the other end of the key K2 is connected to one end of a resistor R19 .

7. The control circuit with milk suction and nasal suction functions according to claim 1, characterized in that: The encoder detection circuit includes: one end of a resistor R24 ​​is connected to one end of a resistor R25, the other end of the resistor R24 ​​is respectively connected to one end of a resistor R14 and one end of a capacitor C5, the other end of the capacitor C5 is grounded, the other end of the resistor R25 is connected to one end of a resistor R23, the other end of the resistor R23 is connected to one end of a capacitor C6, the base of a transistor Q6 is connected to one end of the resistor R13, the emitter of the transistor Q6 is grounded, and the collector of the transistor Q6 is connected to pin 3 of the connection terminal CON5.

8. The control circuit with milk suction and nasal suction functions according to any one of claims 1 to 7, characterized in that: The LED display circuit includes a first LED display circuit, a second LED display circuit, a third LED display circuit and a fourth LED display circuit.

9. The control circuit with milk suction and nasal suction functions according to claim 8, characterized in that: The first LED display circuit includes: the cathode of the diode D1 is respectively connected to the cathode of the diode D2, the cathode of the diode D3, the cathode of the diode D4, the cathode of the diode D5, the cathode of the diode D6, and the cathode of the diode D7.

10. The control circuit with milk suction and nasal suction functions according to claim 8, characterized in that: The second LED display circuit includes: a cathode of a diode D8 is connected to a cathode of a diode D9, a cathode of a diode D10, a cathode of a diode D11, a cathode of a diode D12, a cathode of a diode D13, and a cathode of a diode D14 respectively.

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