Control display circuit for air pump and inflation device

Abstract

The utility model relates to the technical field of air pump control, and particularly provides a control display circuit for an air pump and an inflation device. In the control display circuit, a USB interface is connected with the input end of a charging module; the output end of the charging module is respectively connected with the battery interface and the power supply ends of the main control chip, the electric quantity display module, the motor driving module and the mosquito repelling lamp driving module, and the signal end of the charging module is connected with the first data end of the main control chip; the first control end of the main control chip is connected with the control end of the electric quantity display module, the second control end and the second data end of the main control chip are electrically connected with the control end and the feedback end of the motor driving module respectively, the third data end of the main control chip is connected with the switch module, and the third control end of the main control chip is connected with the control end of the mosquito repelling lamp driving module; the battery interface is connected with a battery; the motor driving module is used for driving a motor; and the mosquito repelling lamp driving module is used for driving the mosquito repelling lamp, so that an air pump control technical scheme which does not directly depend on an external power supply to work and can meet the mosquito repelling requirement is realized.

Description

Technical Field

[0001] This utility model belongs to the field of air pump control technology, and in particular relates to a control display circuit and an air filling device for an air pump. Background Technology

[0002] Air pumps are commonly used devices in daily life and industrial production, and they are widely used in various scenarios. For example, in outdoor inflation scenarios, existing air pumps are generally powered directly by a car battery. However, users often encounter insufficient vehicle power during outdoor activities, at which point the car battery cannot provide power to the air pump, limiting its operation. In addition, mosquito infestation is a frequent problem when inflating air outdoors, and users often experience disruptions to the inflation process when using existing air pumps due to mosquito infestation.

[0003] Therefore, there is a need for an air pump control technology solution that does not directly rely on an external power source to operate and can meet the needs of mosquito repellency. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a control and display circuit and an inflation device for an air pump.

[0005] This utility model provides a control and display circuit for an air pump, including a USB interface, a charging module, a battery interface, a main control chip, a power display module, a motor drive module, a switch module, and a mosquito repellent lamp drive module.

[0006] The output terminal of the USB interface is electrically connected to the input terminal of the charging module;

[0007] The output terminal of the charging module is electrically connected to the positive terminal of the battery interface and the power terminals of the main control chip, the power display module, the motor drive module, and the mosquito repellent lamp drive module, respectively, and its signal terminal is electrically connected to the first data terminal of the main control chip.

[0008] The first control terminal of the main control chip is electrically connected to the control terminal of the power display module, its second control terminal and second data terminal are electrically connected to the control terminal and feedback terminal of the motor drive module, respectively, its third data terminal is electrically connected to the output terminal of the switch module, and its third control terminal is electrically connected to the control terminal of the mosquito repellent lamp drive module.

[0009] The battery interface is used to connect the battery;

[0010] The motor drive module is used to drive the motor;

[0011] The mosquito repellent lamp driver module is used to drive the mosquito repellent lamp.

[0012] One possible implementation also includes a lighting driver module;

[0013] The power supply terminal of the lighting drive module is electrically connected to the positive terminal of the battery interface, and its control terminal is electrically connected to the fourth control terminal of the main control chip.

[0014] The lighting driver module is used to drive the lighting lamp.

[0015] In one possible implementation, the motor drive module, the lighting drive module, and the mosquito repellent lamp drive module are all implemented based on MOSFETs.

[0016] In one possible implementation, the USB interface is of type Type-C;

[0017] The VBUS pin of the USB interface is connected as its output terminal, and its CC1 and CC2 pins are electrically grounded through the first resistor and the second resistor, respectively. Its GND pin is electrically grounded.

[0018] In one possible implementation, a third resistor and a fourth resistor are also included;

[0019] The output terminal of the USB interface is electrically connected to the first terminal of the third resistor;

[0020] The second end of the third resistor is electrically connected to the first end of the fourth resistor and the DC input detection terminal of the main control chip, respectively.

[0021] The second end of the fourth resistor is electrically grounded.

[0022] In one possible implementation, the charging module includes a first charging chip and a fifth resistor;

[0023] The voltage input pin, battery connection pin, and status indication pin of the first charging chip are used as the input terminal, output terminal, and signal terminal of the charging module, respectively. Its grounding pin is electrically grounded, and its setting pin is electrically grounded through the fifth resistor.

[0024] In one possible implementation, the charging module includes a second charging chip, a third charging chip, a sixth resistor, a seventh resistor, and an eighth resistor;

[0025] The voltage input pin and enable pin of the second charging chip, the voltage input pin of the third charging chip, and the first end of the eighth resistor are electrically connected to serve as the input terminal of the charging module.

[0026] The charging completion indicator pin of the second charging chip, the enable pin of the third charging chip, and the second terminal of the eighth resistor are electrically connected.

[0027] The status indicator pin of the third charging chip serves as the signal terminal of the charging module.

[0028] The grounding pins of the second charging chip and the third charging chip are electrically connected to ground, and their respective setting pins are electrically connected to ground through the sixth resistor and the seventh resistor, respectively. Their respective battery connection pins are electrically connected as the output terminals of the charging module.

[0029] In one possible implementation, the charging module includes a boost charging unit and a buck voltage regulator unit;

[0030] The output terminals of the charging module are divided into a first output terminal and a second output terminal.

[0031] The input terminal of the boost charging unit serves as the input terminal of the charging module, and its boost output terminal serves as the first output terminal of the charging module and is electrically connected to the positive terminal of the battery interface, the input terminal of the buck regulator unit, the motor drive module, and the power supply terminal of the mosquito repellent lamp drive module, respectively. Its charging indicator terminal serves as the signal terminal of the charging module.

[0032] The output terminal of the buck regulator unit serves as the second output terminal of the charging module and is electrically connected to the power supply terminals of the main control chip and the power display module, respectively.

[0033] One possible implementation also includes a power detection module;

[0034] The main control chip also includes a battery power detection terminal and a power detection control terminal;

[0035] The input terminal of the power detection module is electrically connected to the positive terminal of the battery interface, its channel control terminal is electrically connected to the power detection control terminal of the main control chip, and its resistor divider terminal is electrically connected to the battery power detection terminal of the main control chip.

[0036] This utility model also provides an inflation device, including an air pump, a motor, and a control and display circuit as described above;

[0037] The air pump is connected to the drive end of the motor;

[0038] The power supply terminal of the motor is connected to the motor drive module in the control and display circuit;

[0039] The control and display circuit controls the operation of the air pump through the motor.

[0040] The technical solution provided by this utility model has at least the following beneficial effects:

[0041] This application integrates a USB interface, charging module, battery interface, main control chip, power display module, motor drive module, switch module, and mosquito repellent lamp drive module into a single design. The air pump can be powered by a battery connected to the battery interface, and the USB interface can also be used to charge the battery via the charging module. This effectively avoids the limitations of the air pump operating solely with an external power source. Furthermore, the mosquito repellent lamp drive module integrates mosquito control functions, meeting users' mosquito repellent needs. Additionally, the lighting drive module integrates lighting control functions, meeting users' lighting needs at night or in emergencies, thus expanding the product's application scenarios. Attached Figure Description

[0042] Figure 1 A first circuit principle block diagram of a control and display circuit based on an air pump provided for an embodiment of this utility model;

[0043] Figure 2 A second circuit principle block diagram of a control and display circuit based on an air pump provided for an embodiment of this utility model;

[0044] Figure 3 A first circuit schematic diagram including a USB interface and a charging module is provided for embodiments of this utility model;

[0045] Figure 4 A second circuit schematic diagram including a USB interface and a charging module is provided for embodiments of this utility model;

[0046] Figure 5 A third circuit principle block diagram of a control and display circuit based on an air pump provided for an embodiment of this utility model;

[0047] Figure 6 A fourth circuit principle block diagram of a control and display circuit based on an air pump provided for an embodiment of this utility model;

[0048] Figure 7 A first circuit schematic diagram including a main control chip is provided for an embodiment of this utility model;

[0049] Figure 8 A second circuit schematic diagram including a main control chip is provided for embodiments of this utility model;

[0050] Figure 9 A third circuit schematic diagram including a main control chip is provided for embodiments of this utility model;

[0051] Figure 10A third circuit schematic diagram including a USB interface and a charging module is provided for embodiments of this utility model;

[0052] Figure 11 This is a structural block diagram of an inflation device provided for an embodiment of the present utility model. Detailed Implementation

[0053] To enhance understanding of this utility model, it will be described in further detail below with reference to the accompanying drawings and embodiments. These embodiments are only used to explain this utility model and do not limit the scope of protection of this utility model.

[0054] Please refer to Figures 1 to 10 The present invention provides a control and display circuit for an air pump, including a USB interface USB1, a charging module, a battery interface JP1, a main control chip U1, a power display module, a motor drive module, a switch module, and a mosquito repellent lamp drive module.

[0055] The output terminal of the USB interface USB1 is electrically connected to the input terminal of the charging module;

[0056] The output terminal of the charging module is electrically connected to the positive terminal of the battery interface JP1 and the power terminals of the main control chip U1, the power display module, the motor drive module, and the mosquito repellent lamp drive module, respectively, and its signal terminal is electrically connected to the first data terminal of the main control chip U1.

[0057] The first control terminal of the main control chip U1 is electrically connected to the control terminal of the power display module, its second control terminal and second data terminal are electrically connected to the control terminal and feedback terminal of the motor drive module, respectively, its third data terminal is electrically connected to the output terminal of the switch module, and its third control terminal is electrically connected to the control terminal of the mosquito repellent lamp drive module.

[0058] The battery interface JP1 is used to connect the battery;

[0059] The motor drive module is used to drive the motor;

[0060] The mosquito repellent lamp driver module is used to drive the mosquito repellent lamp.

[0061] In this embodiment, the USB interface USB1 serves as the external power input terminal and can be a standard model, specifically connected to a USB power adapter or a computer's USB port to power the charging module. The charging module can employ a conventional charging implementation scheme. The battery interface JP1 uses a standard configuration. The battery interface JP1 provides power to the circuit by connecting the corresponding battery. When the USB interface USB1 is connected to a USB power source, the charging module charges the battery through the battery interface JP1. The main control chip U1 uses a standard control chip, such as a conventional microcontroller. The power display module can be based on a standard LED to indicate the battery's charging level. The motor drive module can be implemented using a standard switching transistor (such as a transistor, MOSFET, etc.). The switching module can use a standard switch.

[0062] In practical implementation, the main control chip U1 can be the NY8B062F model chip in SOP16 package, which is responsible for the logic control of the entire system, including button detection on the switch module, motor start and stop control on the motor drive module, and power indicator light drive on the power display module.

[0063] In one specific implementation, such as Figure 7The power display module is based on four power indicator lights: LED1, LED2, LED3, and LED4. These indicator lights can be standard LEDs. A current-limiting resistor R9 is also included to protect the indicator lights from overcurrent damage. Pin 5 of the main control chip U1 is connected to LED1, pin 13 to LED2, pin 3 to LED3, and pin 2 to LED4. Based on the battery charging status feedback from pin 1 (CHRG pin) of the charging chip U2-1, and in conjunction with the voltage detection within the main control chip U1, the number of illuminated power indicator lights (LED1, LED2, LED3, LED4) is controlled; the higher the battery level, the more indicator lights are illuminated. Pins 2, 3, 5, and 13 of the main control chip U1 serve as the first control terminal, while the negative terminals of the four power indicator lights (LED1, LED2, LED3, and LED4) serve as the control terminal for the power display module. The switch module consists of buttons S1 and S2. In this embodiment, button S1 is a power switch, controlling the power on and off of the control display circuit, and button S2 is an air pump switch, controlling the motor to start and stop. Specifically, button S1 determines whether the main control chip U1 is powered on, and button S2 controls the motor to run when powered on. Initially, the power path of the main control chip U1 is not connected. When the user presses button S1, pin 15 of the main control chip U1 changes from high level to low level, and the main control chip U1 connects the power path through its internal circuit, thereby powering on the main control chip U1. The power indicator light stays on, and it enters standby mode. It should be noted that the "constantly lit" power indicator lights here refer to the number of indicator lights that are constantly lit, corresponding to the battery level. For example: when the battery is fully charged, four indicator lights (LED1, LED2, LED3, and LED4) will be constantly lit; when the battery is 3 / 4 full, three indicator lights (LED1, LED2, and LED3) will be constantly lit; when the battery is 1 / 2 full, two indicator lights (LED1 and LED2) will be constantly lit; and when the battery is 1 / 4 full, one indicator light (LED1) will be constantly lit. When the main control chip U1 is powered on, when the user presses button S2, the main control chip U1 detects that pin 14 changes from high to low. It then generates a signal through pin 6, outputting a high level. The gate voltage of the switching transistor, i.e., NMOS transistor Q1, increases, entering the conduction state, driving the motor connected to the motor interface JP2 to operate. Pressing button S2 again, the main control chip U1 detects that pin 14 changes from low to high. It then generates a signal through pin 6, outputting a low level. NMOS transistor Q1 does not conduct, the motor does not work, and the product enters standby mode. Regardless of whether the motor is working or not (product standby), when button S1 is pressed again, pin 15 of the main control chip U1 changes from low level to high level, the main control chip U1 disconnects the power path, the main control chip U1 stops working, the power indicator light goes out, and the device is powered off.

[0064] It should be noted that traditional air pump control circuit designs lack a mosquito-repelling lamp, failing to meet users' mosquito-repelling needs at night or in other situations. To address this, this application solves the mosquito-repelling requirement by incorporating a mosquito-repelling lamp driver module. In practical implementation, it is combined with... Figure 7 The main control chip U1 is responsible for the system's logic control, which also includes the control of the mosquito repellent lamp switch on the mosquito repellent lamp driver module. The mosquito repellent lamp switch can be implemented by a switching transistor (such as a MOSFET, a triode, etc.).

[0065] In one possible implementation, such as Figure 2 The control display circuit also includes a lighting driver module;

[0066] The power supply terminal of the lighting drive module is electrically connected to the positive terminal of the battery interface, and its control terminal is electrically connected to the fourth control terminal of the main control chip U1.

[0067] The lighting driver module is used to drive the lighting lamp.

[0068] It should be noted that traditional air pump control circuit designs lack lighting, failing to meet users' lighting needs at night or in emergencies. To address this, this application solves the lighting requirement by incorporating a lighting driver module. In practical implementation, it is combined with... Figure 7 The main control chip U1 is responsible for the system's logic control, which also includes the control of the lighting switch on the lighting driver module. The lighting switch can be implemented by a switching transistor (such as a MOSFET, a bipolar transistor, etc.).

[0069] In one possible implementation, the motor drive module, the lighting drive module, and the mosquito repellent lamp drive module are all implemented based on MOSFETs.

[0070] In this embodiment, the MOSFET can be a conventional type, such as an N-type MOSFET or a P-type MOSFET, depending on the actual implementation requirements. In one specific implementation, such as... Figure 7The motor drive module has a VC of +3.7V and includes an NMOS transistor Q1, a motor interface JP2, a Schottky diode D1, resistors R10, R11, and R12, and a capacitor C5. Resistor R10 is a pull-down resistor for the NMOS transistor Q1, used to ensure reliable turn-off, prevent false triggering, and improve turn-off speed. Resistor R11 and capacitor C5 form an RC filter to reduce high-frequency interference. Resistor R12 is a current-limiting resistor to protect the motor. Pin 6 of the main control chip U1 serves as the second control terminal, and pin 11 serves as the second data terminal. The mosquito repellent lamp drive module includes an NMOS transistor Q2, a mosquito repellent lamp interface JP3, and a resistor R13. Resistor R13 is a current-limiting resistor to protect the mosquito repellent lamp. The lighting lamp drive module includes an NMOS transistor Q3, a lighting lamp interface JP4, and a resistor R14. Resistor R14 is a current-limiting resistor to protect the lighting lamp. Specifically, pin 6 of the main control chip U1 initially outputs a low level (off state). The gate voltage of NMOS transistor Q1 is insufficient to turn on the MOSFET, so NMOS transistor Q1 is off, and the motor is not powered. Pin 15 of the main control chip U1 is initially high. When the user double-clicks button S1 (air pump switch), it detects the button input (detecting two "high-low-high" pulses within a set time range). The signal is sent to the main control chip U1, which generates a signal through pin 6, outputting a high level. The gate voltage of NMOS transistor Q1 (the MOSFET) increases, entering the conducting state, driving the motor to run, and keeping the power indicator light on. When the user then clicks button S1 (air pump switch), NMOS transistor Q1 is de-energized, the motor is powered off, and the power indicator light goes out. It should be noted that although the motor is powered off, the current does not disappear immediately, resulting in a reverse voltage. To address this, a Schottky diode D1 can be connected to the motor interface JP2. When the motor is powered off and a reverse voltage is generated, the Schottky diode D1 conducts, providing a freewheeling path and preventing the NMOS transistor Q1 from being damaged by excessive reverse voltage. The motor stops operating as the current gradually disappears. When the user double-clicks button S2 (light switch), pin 14 of the main control chip U1 detects the double-click (detecting two "high-low-high" pulses within a set time range). The signal is sent to the main control chip U1, which generates a high-level signal through pin 9. The gate voltage of the NMOS transistor Q3 increases, and the MOSFET enters the conducting state. The light connected to the light interface JP4 is lit and can be used for illumination (at this time, the LEDs in the light are at half brightness, which can be controlled by adjusting the conduction level of the NMOS transistor Q3). When the user clicks button S2 (light switch), pin 14 of the main control chip U1 detects the click (one "high-low-high" pulse), controlling the LEDs in the light to be fully lit.When the user clicks button S2 (mosquito repellent lamp switch) again, pin 14 of the main control chip U1 detects the click. The main control chip U1 generates a signal through pin 10, outputting a high level. The gate voltage of NMOS transistor Q2 increases, the MOSFET enters the conducting state, and the mosquito repellent lamp connected to interface JP3 is lit. When the user clicks button S2 (lighting lamp switch) again, pin 14 of the main control chip U1 detects the click and controls the lighting lamp on interface JP4 to enter flashing mode (the lighting lamp flashes in a cycle of "3 short flashes - 3 long flashes - 3 short flashes," with the LED at maximum brightness). When the user clicks button S2 (lighting lamp and mosquito repellent lamp switch) again, pin 14 of the main control chip U1 detects the click. The main control chip U1 generates signals through pins 9 and 10, both outputting low levels. The gate voltages of NMOS transistors Q3 and Q2 decrease, the MOSFETs do not conduct, the lighting lamp does not work, and the mosquito repellent lamp is turned off. It should be noted that the above description of the working states of the lighting and mosquito repellent lamps is for illustrative purposes only, and adjustments can be made according to the actual situation during implementation.

[0071] In one possible implementation, such as Figure 3 The USB interface USB1 is of type Type-C;

[0072] The VBUS pin of the USB interface USB1 is connected as its output terminal, and its CC1 and CC2 pins are electrically grounded through the first resistor R1 and the second resistor R2, respectively. Its GND pin is also electrically grounded.

[0073] In this embodiment, the first resistor R1 and the second resistor R2 are pull-down resistors, using standard models. The CC1 and CC2 pins correspond to the CC channel, which is the configuration channel in the USB interface. The first resistor R1 and the second resistor R2 can be used to detect the connection status of the USB interface or for power capability negotiation, i.e., to help determine whether the USB device is connected and the power negotiation status.

[0074] In one possible implementation, a third resistor R3 and a fourth resistor R4 are also included;

[0075] The output terminal of the USB interface USB1 is electrically connected to the first terminal of the third resistor R3;

[0076] The second end of the third resistor R3 is electrically connected to the first end of the fourth resistor R4 and the DC input detection terminal DC_IN of the main control chip U1, respectively.

[0077] The second end of the fourth resistor R4 is electrically grounded.

[0078] In this embodiment, as Figure 3The third resistor R3 and the fourth resistor R4 are voltage divider resistors. The voltage divider input is sent to the DC input detection terminal DC_IN of the main control chip U1. The main control chip U1 can use this to identify whether a charger is properly connected to the USB interface USB1. The output terminal of the USB interface USB1 is marked with +USB.

[0079] In one possible implementation, the charging module includes a first charging chip U2-1 and a fifth resistor R5;

[0080] The voltage input pin VCC, battery connection pin BAT, and status indication pin CHRG of the first charging chip U2-1 are used as the input terminal, output terminal, and signal terminal of the charging module, respectively. Its grounding pin is electrically grounded, and its setting pin PROG is electrically grounded through the fifth resistor R5.

[0081] In this embodiment, combined with Figure 3 and Figure 7 The USB interface USB1 powers the first charging chip U2-1. The battery interface JP1 connects to a 3.7V single-cell lithium battery. The first charging chip U2-1 is a conventional charging management chip that monitors the battery voltage and charging current, dynamically adjusts charging parameters, converts a stable power supply to a suitable voltage for battery charging, performs constant current and constant voltage charging, and regulates the charging process according to the battery's state. When the battery voltage is low, the first charging chip U2-1 charges the battery in constant current mode; when the battery is nearing full charge, the first charging chip U2-1 switches to constant voltage mode, reducing the current until charging is complete. Specifically, the first charging chip U2-1 can be a KP641003HLGA model in an SOT23-5 package, capable of receiving the 5V voltage output from the USB interface USB1 to charge a single-cell lithium battery. Pin 4 of the first charging chip U2-1 is the power input pin VCC, used to receive the 5V voltage output from the USB interface USB1. Pin 3 of the first charging chip U2-1 is the battery connection pin BAT, directly connected to the positive terminal of the battery. Pin 1 of the first charging chip U2-1 is a signal pin, i.e., the status indicator pin CHRG, connected to the main control chip U1. The battery's "charging" and "fully charged" states are fed back to the main control chip U1 through pin 1. The fifth resistor R5 is a charging current sampling resistor, connected to pin 5 of the first charging chip U2-1, forming a loop between pins 1 and 5. Resistor R5 is used to set the charging current, allowing the first charging chip U2-1 to adjust the charging mode (constant current or constant voltage) based on the charging current, achieving safe battery charging. Furthermore, a filter capacitor C2 can be added to filter the 5V power supply from the USB interface USB1, eliminating interference and high-frequency noise, and providing a stable DC power supply for subsequent circuits. Simultaneously, capacitors C3 and C4 can be added to the power supply terminal of the main control chip U1 to ensure the smoothness and stability of the power supply voltage of the main control chip U1.

[0082] In one possible implementation, such as Figure 4 The charging module includes a second charging chip U2-2, a third charging chip U2-3, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8.

[0083] The voltage input pin VCC and enable pin CE of the second charging chip U2-2, the voltage input pin VCC of the third charging chip U2-3, and the first end of the eighth resistor R8 are electrically connected to serve as the input terminal of the charging module.

[0084] The charging completion indicator pin STDBY of the second charging chip U2-2, the enable pin CE of the third charging chip U2-3, and the second terminal of the eighth resistor R8 are electrically connected.

[0085] The status indicator pin CHRG of the third charging chip U2-3 serves as the signal terminal of the charging module.

[0086] The grounding pins of the second charging chip U2-2 and the third charging chip U2-3 are electrically connected to ground, and their respective setting pins PROG are electrically connected to ground through the sixth resistor R6 and the seventh resistor R7, respectively. Their respective battery connection pins BAT are electrically connected as the output terminals of the charging module.

[0087] In this embodiment, combined with Figure 4 and Figure 8 The USB interface USB1 supplies power to the second charging chip U2-2 and the third charging chip U2-3. The second charging chip U2-2 and the third charging chip U2-3 can be two identical models, such as the KP641000XESGA model in an ESOP8 package, primarily used to provide the required charging current. Resistors R6 and R7 are charging current setting resistors, used to monitor the charging current so that the second charging chip U2-2 and the third charging chip U2-3 can adjust the charging mode according to the charging current, achieving safe battery charging. Resistor R8 is a current-limiting resistor. After the battery connection pins BAT of the second charging chip U2-2 and the third charging chip U2-3 are connected, a capacitor C1 can be connected for filtering. A resistor R26 and a capacitor C3 can also be set at the power supply terminal of the main control chip U1 as a decoupling capacitor. Resistor R26 and capacitor C3 form an RC filter circuit, thereby protecting the main control chip U1.

[0088] In one possible implementation, such as Figure 5 The charging module includes a boost charging unit and a buck voltage regulator unit;

[0089] The output terminals of the charging module are divided into a first output terminal and a second output terminal.

[0090] The input terminal of the boost charging unit serves as the input terminal of the charging module, and its boost output terminal serves as the first output terminal of the charging module and is electrically connected to the positive terminal of the battery interface JP1, the input terminal of the buck regulator unit, the motor drive module, and the power supply terminal of the mosquito repellent lamp drive module, respectively. Its charging indicator terminal serves as the signal terminal of the charging module.

[0091] The output terminal of the step-down voltage regulator unit serves as the second output terminal of the charging module and is electrically connected to the power supply terminals of the main control chip U1 and the power display module, respectively.

[0092] In this embodiment, combined with Figure 9 and Figure 10 The USB interface USB1 powers the boost charging unit, with VC1 at 7.4V and VC2 at 5V. In practice, the boost charging unit can be implemented using charging chip U2-4, and the buck regulator unit can be implemented using voltage regulator chip U3. Charging chip U2-4 can be an Ingenic IP2320 in an ESOP8 package. It boosts the input 5V voltage to a suitable charging voltage to charge the dual-cell series lithium battery (nominal 7.4V) and manages the charging process (including constant current / constant voltage charging and NTC temperature detection). Voltage regulator chip U3 can be a TM16411 in a 50TA package. It regulates the battery voltage to a fixed 5V and outputs 5V to power other devices (including the main control chip U1 and the power display module).

[0093] In one specific implementation, the charging chip U2-4 supports a 5V input source. Its pin 6 (VIN) is the power input pin, used to receive the 5V voltage output from the USB interface USB1. Pin 2 (VOUT) is the charging output pin, used to connect a dual-cell series lithium battery through the battery interface JP1, outputting a boosted charging voltage to charge the battery. Pin 8 (SW) is connected to one end of an inductor L1, and the other end of inductor L1 is connected to the charging detection resistor R20 and the output terminal of the USB interface USB1. The charging chip U2-4 controls the charging and discharging of inductor L1 through pin 8 (SW). During charging, inductor L1 absorbs energy from the input power +USB and provides current to the output. During discharging, inductor L1 releases the stored energy to the load. The charging chip U2-4 monitors the output voltage and adjusts the charging and discharging time, ultimately maintaining the output voltage and current at the set values, achieving voltage boosting. The voltage regulator chip U3's VDD pin is the power input pin, connected to the positive terminal of the battery through resistor R27. Resistor R27 can be connected to capacitors C15 and C16 respectively. Capacitors C15 and C16 act as filter capacitors on the input side of the voltage regulator chip U3, reducing interference and noise. Resistor R27 and capacitors C15 or C16 form a simple RC filter to suppress high-frequency interference. A capacitor C17 can be connected to the output side of the voltage regulator chip U3. Capacitor C17 acts as a filter capacitor on the output side of the voltage regulator chip U3, reducing output ripple.

[0094] The voltage regulator chip U3 can regulate 7.4V to 5V. Its OUT pin is the power output pin, and the output 5V voltage provides operating power for the power display module, main control chip U1, etc. Pin 1 (VDD pin) of the main control chip U1 is the power input pin, receiving the 5V power from the voltage regulator chip U3. The main control chip U1 is also connected to the programming port JP5. Pin 15 of the main control chip U1 is grounded through button S1 and is also connected to pin 3 of the programming port JP5. Pin 4 of the main control chip U1 is grounded through button S2, and pin 13 of the main control chip U1 is connected to pin 4 of the programming port JP5. To smooth the power supply voltage on the VDD pin and reduce high-frequency noise, a capacitor C4 can be connected to the VDD pin. To prevent excessively high transient voltage from damaging the battery and subsequent circuits, a diode VD1 can be connected to the positive terminal of the battery interface JP1. The diode VD1 can be a TVS diode. To filter out high-frequency noise and interference signals, filter capacitors C8 and C12 can also be used. The VSET pin of charging chip U2-4 is connected to resistor R24 ​​as a sampling resistor to set the charging current. The VSET pin of charging chip U2-4 is also connected to resistor R25 for monitoring battery temperature; if the battery temperature is too high or too low, charging chip U2-4 will limit or stop charging the battery. The BST pin of charging chip U2-4 is connected to capacitor C9, which reduces interference and noise from charging chip U2-4 on the charging / discharging management signal of inductor L1. The LED pin of charging chip U2-4 is connected to resistors R22 and R23, which can both lower the operating voltage and maintain a normal level during idle time, thus enabling the detection of charging status. The VIN pin of charging chip U2-4 can be connected to resistor R20 and capacitor C10; capacitor C10 and resistor R20 work together to filter out interference signals.

[0095] In one possible implementation, such as Figure 6 It also includes a power detection module;

[0096] The main control chip U1 also includes a battery power detection terminal and a power detection control terminal;

[0097] The input terminal of the power detection module is electrically connected to the positive terminal of the battery interface JP1, its channel control terminal is electrically connected to the power detection control terminal of the main control chip U1, and its resistor voltage divider terminal is electrically connected to the battery power detection terminal of the main control chip U1.

[0098] In this embodiment, combined with Figure 9The battery detection module includes resistors R15, R16, R17, and R18, an NMOS transistor Q4, and a capacitor C6. Resistors R15 and R18 are voltage divider resistors, which can reduce the battery voltage to a safe detection range. Resistor R16 is a pull-down resistor for the NMOS transistor Q4, used to ensure reliable turn-off of the NMOS transistor Q4, prevent false triggering, and improve turn-off speed. Resistor R18 and capacitor C6 form an RC filter to reduce high-frequency interference. After the air pump is turned on, pin 9 of the main control chip U1 outputs a high level, the NMOS transistor Q4 is turned on, resistors R15 and R18 are grounded, and the main control chip U1 reads the battery voltage. If the battery power is too low (e.g., below a set threshold), the main control chip U1 triggers the protection logic, executes shutdown, its pin 9 outputs a low level, the NMOS transistor Q4 is turned off, resistors R15 and R18 are disconnected, reducing battery self-discharge and putting the system into a low-power state. At the same time, the battery indicator light is lit to remind the user to charge. The main control chip U1 will then continuously attempt to power on again, and will automatically restore normal power supply once the battery is sufficiently charged.

[0099] like Figure 11 The present invention also provides an inflation device, including an air pump, a motor and a control and display circuit as described above;

[0100] The air pump is connected to the drive end of the motor;

[0101] The power supply terminal of the motor is connected to the motor drive module in the control and display circuit;

[0102] The control and display circuit controls the operation of the air pump through the motor.

[0103] The above embodiments should not limit the present invention in any way. All technical solutions obtained by equivalent substitution or equivalent conversion fall within the protection scope of the present invention.

Claims

1. A control and display circuit for an air pump, characterized in that, Includes a USB interface, charging module, battery interface, main control chip, power display module, motor drive module, switch module, and mosquito repellent lamp drive module; The output terminal of the USB interface is electrically connected to the input terminal of the charging module; The output terminal of the charging module is electrically connected to the positive terminal of the battery interface and the power terminals of the main control chip, the power display module, the motor drive module, and the mosquito repellent lamp drive module, respectively, and its signal terminal is electrically connected to the first data terminal of the main control chip. The first control terminal of the main control chip is electrically connected to the control terminal of the power display module, its second control terminal and second data terminal are electrically connected to the control terminal and feedback terminal of the motor drive module, respectively, its third data terminal is electrically connected to the output terminal of the switch module, and its third control terminal is electrically connected to the control terminal of the mosquito repellent lamp drive module. The battery interface is used to connect the battery; The motor drive module is used to drive the motor; The mosquito repellent lamp driver module is used to drive the mosquito repellent lamp.

2. The control display circuit according to claim 1, characterized in that, It also includes a lighting driver module; The power supply terminal of the lighting drive module is electrically connected to the positive terminal of the battery interface, and its control terminal is electrically connected to the fourth control terminal of the main control chip. The lighting driver module is used to drive the lighting lamp.

3. The control display circuit according to claim 2, characterized in that, The motor drive module, the lighting drive module, and the mosquito repellent lamp drive module are all implemented based on MOSFETs.

4. The control display circuit according to claim 1, characterized in that, The USB interface is Type-C. The VBUS pin of the USB interface is connected as its output terminal, and its CC1 and CC2 pins are electrically grounded through the first resistor and the second resistor, respectively. Its GND pin is electrically grounded.

5. The control display circuit according to claim 1, characterized in that, It also includes a third resistor and a fourth resistor; The output terminal of the USB interface is electrically connected to the first terminal of the third resistor; The second end of the third resistor is electrically connected to the first end of the fourth resistor and the DC input detection terminal of the main control chip, respectively. The second end of the fourth resistor is electrically grounded.

6. The control display circuit according to claim 1, characterized in that, The charging module includes a first charging chip and a fifth resistor; The voltage input pin, battery connection pin, and status indication pin of the first charging chip are used as the input terminal, output terminal, and signal terminal of the charging module, respectively. Its grounding pin is electrically grounded, and its setting pin is electrically grounded through the fifth resistor.

7. The control display circuit according to claim 1, characterized in that, The charging module includes a second charging chip, a third charging chip, a sixth resistor, a seventh resistor, and an eighth resistor; The voltage input pin and enable pin of the second charging chip, the voltage input pin of the third charging chip, and the first end of the eighth resistor are electrically connected to serve as the input terminal of the charging module. The charging completion indicator pin of the second charging chip, the enable pin of the third charging chip, and the second terminal of the eighth resistor are electrically connected. The status indicator pin of the third charging chip serves as the signal terminal of the charging module. The grounding pins of the second charging chip and the third charging chip are electrically connected to ground, and their respective setting pins are electrically connected to ground through the sixth resistor and the seventh resistor, respectively. Their respective battery connection pins are electrically connected as the output terminals of the charging module.

8. The control display circuit according to claim 1, characterized in that, The charging module includes a boost charging unit and a buck voltage regulator unit; The output terminals of the charging module are divided into a first output terminal and a second output terminal. The input terminal of the boost charging unit serves as the input terminal of the charging module, and its boost output terminal serves as the first output terminal of the charging module and is electrically connected to the positive terminal of the battery interface, the input terminal of the buck regulator unit, the motor drive module, and the power supply terminal of the mosquito repellent lamp drive module, respectively. Its charging indicator terminal serves as the signal terminal of the charging module. The output terminal of the buck regulator unit serves as the second output terminal of the charging module and is electrically connected to the power supply terminals of the main control chip and the power display module, respectively.

9. The control display circuit according to claim 8, characterized in that, It also includes a power detection module; The main control chip also includes a battery power detection terminal and a power detection control terminal; The input terminal of the power detection module is electrically connected to the positive terminal of the battery interface, its channel control terminal is electrically connected to the power detection control terminal of the main control chip, and its resistor divider terminal is electrically connected to the battery power detection terminal of the main control chip.

10. An inflation device, characterized in that, Includes an air pump, a motor, and a control and display circuit as described in any one of claims 1 to 9; The air pump is connected to the drive end of the motor; The power supply terminal of the motor is connected to the motor drive module in the control and display circuit; The control and display circuit controls the operation of the air pump through the motor.

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