A multifunctional vehicle-mounted refrigerator control system

Abstract

The utility model discloses a multifunctional vehicle refrigerator control system belongs to the intelligent house technical field. The system includes microprocessor, photoelectric sensor, hall sensor, wireless communication module, piezoelectric detection module, power module, voice collection and broadcast module, motor drive module and refrigerator door motor. The system integrates speech recognition, remote communication, multi -sensor fusion detection and intelligent motor drive function, and supports voice, mobile phone APP remote and local multiple interactive mode, adapts to the complex environment of vehicle. Through the hall sensor and piezoelectric detection module cooperation, the real -time current detection of motor drive module is combined, realizes the door body position accurate perception and the double protection of anti -hand clamping, improves security and reliability. The utility model effectively solved the traditional vehicle refrigerator interactive mode single, environmental adaptability is poor, and the low detection precision and the safety problem such as lack, is applicable to long -distance driving, outdoor camping and a variety of vehicle scenes.

Description

Technical Field

[0001] This utility model relates to the field of smart home technology, specifically a multi-functional vehicle refrigerator control system. Background Technology

[0002] With the rapid development of the automotive industry and the diversification of people's travel needs, in-vehicle refrigerators, as an important piece of equipment to improve travel convenience and comfort, have been widely used in scenarios such as long-distance driving and outdoor camping. However, existing in-vehicle refrigerator control systems still have many problems that need to be solved, making it difficult to meet the diverse needs of users in complex in-vehicle environments.

[0003] In terms of interaction methods, traditional car refrigerators mostly rely on manual opening and closing, which is cumbersome to operate and poses safety hazards while the vehicle is in motion; some products with electric control functions only support single touch screen or button operation, lacking multimodal interaction capabilities such as voice, remote, and tap, and cannot adapt to the small space inside the car and the operating habits of different users.

[0004] In terms of environmental adaptability, vibrations and bumps in vehicle environments can easily cause traditional sensors to malfunction. Existing control systems have insufficient position detection accuracy (such as large errors in slide rail displacement) and lack effective vibration resistance design, often resulting in problems such as refrigerator doors not opening and closing properly or false triggering. At the same time, most products are not optimized for vehicle power characteristics, resulting in low power conversion efficiency and poor battery life, making it difficult to meet the needs of long-term outdoor use.

[0005] In terms of safety and practicality, the existing products have inadequate anti-pinch design, lacking the dual protection of Hall sensors and current detection, making them prone to accidents due to misoperation. Furthermore, they lack a multi-user collaborative control mechanism, making it impossible for the driver to manage the rear refrigerator's operating permissions. In addition, traditional control systems lack real-time status monitoring and remote adjustment capabilities; users cannot check the refrigerator's battery level or door status via mobile devices, and remote control is difficult, resulting in insufficient ease of use.

[0006] In summary, existing vehicle-mounted refrigerator control systems suffer from drawbacks such as limited interaction methods, weak environmental adaptability, low detection accuracy, insufficient safety assurance, and poor functional expandability. There is an urgent need for a multi-functional control system that integrates multimodal interaction, high shock resistance, high-precision detection, safety, reliability, and low power consumption to solve the aforementioned technical problems. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a multi-functional vehicle-mounted refrigerator control system to solve the problems of the prior art described in the background.

[0008] To solve the above-mentioned technical problems, the embodiments of this utility model provide the following technical solution: a multi-functional vehicle refrigerator control system, including a microprocessor, a photoelectric sensor, a Hall sensor, a wireless communication module, a piezoelectric detection module, a power supply module, a voice acquisition and broadcasting module, a motor drive module, and a refrigerator door motor. The microprocessor is electrically connected to the photoelectric sensor, the Hall sensor, the wireless communication module, the piezoelectric detection module, the power supply module, the voice acquisition and broadcasting module, and the motor drive module. The motor drive module is electrically connected to the refrigerator door motor.

[0009] Furthermore, the microprocessor is a control circuit based on a single-chip microcomputer of model STM32F103C8T6.

[0010] Furthermore, the photoelectric sensor is installed on the side of the refrigerator door or next to the slide rail.

[0011] Furthermore, the wireless communication module is a 4G / 5G wireless communication module.

[0012] Furthermore, the piezoelectric detection module is a force-sensitive resistor.

[0013] Furthermore, the power module includes a 24V to 5V DC circuit based on the AP1501-3.3 chip, and a 5V to 3.3V DC circuit based on the ME6211C33M5G-N chip.

[0014] Furthermore, the voice acquisition and broadcasting module is a chip with the model number HLK-V20-SUIT.

[0015] Furthermore, the motor drive module is a motor drive circuit based on the A4950ELJTR-T chip.

[0016] Furthermore, the piezoelectric detection module is installed at the end of the refrigerator door slide rail.

[0017] Furthermore, the power module is powered by a rechargeable battery.

[0018] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0019] 1. This utility model effectively solves the problem of the single interaction method of traditional car refrigerators, and greatly improves the ease of use and adaptability to various scenarios through multimodal interaction design. The voice acquisition and broadcasting module supports voice control while driving, avoiding the safety hazards of manual operation; the 4G / 5G wireless communication module enables remote control, adapting to outdoor camping, long-distance parking and other off-vehicle operation scenarios. At the same time, the anti-vibration characteristics of the piezoelectric detection module combined with the position monitoring of the Hall sensor cancels out the interference of vehicle bumps on detection, solves the problems of traditional sensor failure and large displacement error, ensures that the door opens and closes properly, and improves the operational reliability in complex vehicle environments.

[0020] 2. This utility model achieves significant optimization in safety protection and battery life, ensuring safe and long-lasting use. The motor drive module has a built-in current detection function, which triggers the motor to reverse when the door encounters an obstruction (such as a hand being pinched). Combined with the position verification of the Hall sensor, this forms a double anti-pinch protection, avoiding safety accidents caused by misoperation. In addition, the system transmits the refrigerator status to a mobile APP in real time, allowing users to remotely monitor the battery level and door status, further enhancing convenience and peace of mind. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the multifunctional vehicle-mounted refrigerator control system of this utility model;

[0022] Figure 2 This is a schematic diagram of the Hall sensor circuit of the multifunctional vehicle-mounted refrigerator control system of this utility model;

[0023] Figure 3 This is a schematic diagram of the power circuit of the multifunctional vehicle-mounted refrigerator control system of this utility model;

[0024] Figure 4 This is a schematic diagram of the microprocessor circuit of the multifunctional vehicle-mounted refrigerator control system of this utility model;

[0025] Figure 5 This is a schematic diagram of the voice acquisition and broadcasting module of the multifunctional vehicle-mounted refrigerator control system of this utility model;

[0026] Figure 6 This is a schematic diagram of the motor drive module of the multifunctional vehicle-mounted refrigerator control system of this utility model. Detailed Implementation

[0027] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0028] like Figure 1 As shown, this utility model proposes a multifunctional vehicle-mounted refrigerator control system, including a microprocessor 1, a photoelectric sensor 3, a Hall sensor 4, a wireless communication module 6, a piezoelectric detection module 7, a power supply module 9, a voice acquisition and broadcasting module 10, a motor drive module 11, and a refrigerator door motor 12. The microprocessor 1 is electrically connected to the photoelectric sensor 3, the Hall sensor 4, the wireless communication module 6, the piezoelectric detection module 7, the power supply module 9, the voice acquisition and broadcasting module 10, and the motor drive module 11. The motor drive module 11 is electrically connected to the refrigerator door motor 12.

[0029] like Figure 4As shown, microprocessor 1 is the control circuit based on the STM32F103C8T6 microcontroller. The STM32F103C8T6 is a 32-bit microcontroller based on the ARM Cortex-M3 core. It processes digital signals through its core and coordinates communication between peripherals and various modules. Its function is to act as the system core, receiving input signals from components such as the impact sensor and ultrasonic sensor, and outputting control commands to modules such as motor drive and voice broadcast. Simultaneously, it synchronizes data to the wireless communication module, enabling the coordinated operation of all components.

[0030] The photoelectric sensor 3 operates based on the photoelectric effect. Its core consists of a light emitter (such as an infrared LED) and a light receiver (such as a phototransistor), and it is usually installed on the side of the refrigerator door or next to the sliding rail. During operation, the emitter continuously emits light signals, and the movement of the door will block or conduct the light. After the receiver senses the change in the intensity of the light signal, it converts it into an electrical signal and transmits it to the microprocessor. This assists the Hall sensor and piezoelectric detection module in calibrating the door position. At the same time, it is adapted to the complex lighting environment of vehicles, reducing false detections and improving the accuracy of door status judgment.

[0031] like Figure 2 The diagram shows a Hall effect sensor circuit. Hall effect sensor 4 is installed at the start and end points of the sliding rail on the refrigerator door. When the door opens or closes, the Hall effect sensor detects a change in the magnetic field strength, thereby monitoring the door position in real time and triggering automatic closing or manual mode switching.

[0032] The wireless communication module 6 is a 4G / 5G wireless communication module. By connecting the microprocessor to the user's mobile APP, it supports users to remotely send commands such as opening and closing the refrigerator door and checking its status. At the same time, it uploads data such as the refrigerator's power, door position, and slide rail displacement to the APP in real time, allowing users to monitor the device status even when they are outside the vehicle. It is suitable for remote operation scenarios such as outdoor camping and long-distance parking.

[0033] The piezoelectric detection module 7 is a force-sensitive resistor. Based on the piezoresistive effect, the force-sensitive resistor works by its resistance changing linearly with pressure, thus converting it into a recognizable electrical signal. Its function is to be installed at the end of the refrigerator door slide rail. When the refrigerator door slides to the end, the door applies pressure to the resistor, and the change in resistance is transmitted to the microprocessor. This signal, combined with laser detection data, verifies whether the door is fully closed. Simultaneously, its vibration-resistant characteristics can counteract interference from vehicle bumps, avoiding misjudgments of the door's condition and improving detection reliability.

[0034] like Figure 3As shown, power module 9 includes a 24V to 5V DC circuit based on the AP1501-3.3 chip and a 5V to 3.3V DC circuit based on the ME6211C33M5G-N chip. The AP1501-3.3 is a step-down DC-DC converter that uses pulse width modulation (PWM) to adjust the output, converting the 24V vehicle power supply to a stable 5V. The ME6211C33M5G-N is a low-dropout linear regulator (LDO), which uses linear adjustment to achieve a low-noise conversion from 5V to 3.3V. Its function is to provide distributed voltage power to the system: 5V output to power components such as the motor drive and voice module, and 3.3V output to low-voltage sensitive components such as the microprocessor and sensors, ensuring voltage matching and stable operation of each module and preventing damage from voltage fluctuations.

[0035] like Figure 5 As shown, the voice acquisition and broadcasting module 10 is a chip of model HLK-V20-SUIT. The HLK-V20-SUIT integrates a microphone array, voice recognition, and audio amplifier circuit. Its principle is that the pickup unit acquires the voice signal and converts the electrical signal into an audio signal for broadcast. Its function is to realize "voice interaction": when the user says commands such as "open the refrigerator door," the module acquires and recognizes the command and transmits it to the microprocessor, triggering the corresponding action; simultaneously, it converts the microprocessor's feedback (such as "the door is open") into a voice broadcast, adapting to scenarios where visibility is limited while driving and improving the convenience of interaction.

[0036] like Figure 6 As shown, the motor drive module 11 is a motor drive circuit based on the A4950ELJTR-T chip. Through the control signal output by the microprocessor, the conduction state of the H-bridge is adjusted to achieve forward and reverse rotation of the motor. Its function is to receive instructions from the microprocessor, drive the actuator motor of the refrigerator door, and control the opening and closing of the door; simultaneously, the chip has a built-in current detection function. When the door encounters resistance (such as a pinched hand), an abnormal increase in current triggers a signal feedback, and the microprocessor then controls the motor to reverse, achieving anti-pinch protection.

[0037] Power module 9 is powered by a rechargeable battery. This module uses a rechargeable battery (such as a lithium battery) that draws power from the vehicle's 24V power supply via a charging circuit. It automatically switches to battery power when the vehicle's power is disconnected. Its function is to provide power redundancy backup. When the vehicle is off and the vehicle's power is cut off, the battery can continue to power core components such as the microprocessor and sensors, ensuring the refrigerator door can open and close normally and perform status monitoring functions. This meets the needs of scenarios where the vehicle's power supply is unavailable, such as outdoor camping or long-distance parking. At the same time, its low-power design extends battery life.

[0038] The working principle of this utility model is as follows:

[0039] This multi-functional vehicle refrigerator control system uses a microprocessor based on the STM32F103C8T6 microcontroller as its core. Through multi-module collaborative linkage, it realizes multi-modal interaction, high-precision detection, safety protection, and remote control functions, adapting to the diverse usage needs in complex vehicle environments. Its complete working principle is as follows:

[0040] Power supply is fundamental to the stable operation of the system. The power module is powered by a rechargeable battery and integrates a 24V to 5V DC circuit based on the AP1501-3.3 chip and a 5V to 3.3V DC circuit based on the ME6211C33M5G-N chip: the 5V voltage powers the power-consuming components such as the motor drive module and the voice acquisition and broadcasting module, while the 3.3V low-noise voltage is suitable for low-voltage sensitive components such as the microprocessor and various sensors.

[0041] In terms of voice interaction, the voice acquisition and broadcasting module (HLK-V20-SUIT chip) collects user voice commands such as "open the refrigerator door" and "check battery level" through a microphone array, converts them into electrical signals, and transmits them to the microprocessor. The microprocessor parses the signals and triggers the corresponding operation, while simultaneously converting feedback signals such as "door open" and "battery fully charged" into voice broadcasts, adapting to operating scenarios where visibility is limited while driving. Remote interaction relies on a 4G / 5G wireless communication module. Users send opening / closing commands or status query requests through a mobile app. The commands are wirelessly transmitted to the microprocessor, and the system simultaneously displays the refrigerator's battery level in real time. Data such as door position and slide rail displacement are transmitted back to the APP for remote control from outside the vehicle. For local detection, Hall sensors are installed at the start and end points of the refrigerator door slide rail. By detecting changes in magnetic field strength when the door moves, the door position signal is fed back in real time. The piezoelectric detection module (force-sensitive resistor) is installed at the end of the slide rail. It uses the piezoresistive effect to convert the pressure generated by the door being squeezed into a resistance value change signal. This is used to verify whether the door is fully closed and also to offset the interference of vehicle bumps with its anti-vibration characteristics, avoiding misjudgment. Photoelectric sensors assist in collecting signals related to the surrounding environment and position of the door, further improving detection accuracy.

[0042] When a voice, remote, or manual opening / closing command is received, the microprocessor sends a control signal to the motor drive module (based on the A4950ELJTR-T chip). By adjusting the H-bridge conduction state, the microprocessor drives the refrigerator door motor to rotate forward or reverse, achieving automatic door opening and closing. During door operation, the motor drive module's built-in current detection function monitors the circuit current in real time. If the door encounters obstruction (such as a hand being pinched), causing an abnormal increase in current, the signal is immediately fed back to the microprocessor. The microprocessor then quickly instructs the motor to reverse, achieving anti-pinch protection. Simultaneously, the microprocessor continuously integrates position signals from the Hall sensor and piezoelectric detection module to verify whether the door is fully open or closed. If incomplete closure or false triggering is detected, the microprocessor will promptly adjust the motor's action or issue a prompt via the voice module.

[0043] Through precise collaboration among its modules, the entire system not only solves the problems of traditional in-vehicle refrigerators, such as limited interaction, low detection accuracy, and poor vibration resistance, but also meets multiple requirements for safety protection, remote control, and low power consumption, making it suitable for various scenarios such as long-distance driving and outdoor camping.

[0044] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A multi-functional vehicle-mounted refrigerator control system, characterized in that, The refrigerator includes a microprocessor (1), a photoelectric sensor (3), a Hall sensor (4), a wireless communication module (6), a piezoelectric detection module (7), a power supply module (9), a voice acquisition and broadcasting module (10), a motor drive module (11), and a refrigerator door motor (12). The microprocessor (1) is electrically connected to the photoelectric sensor (3), the Hall sensor (4), the wireless communication module (6), the piezoelectric detection module (7), the power supply module (9), the voice acquisition and broadcasting module (10), and the motor drive module (11). The motor drive module (11) is electrically connected to the refrigerator door motor (12).

2. The multi-functional vehicle-mounted refrigerator control system according to claim 1, characterized in that, The microprocessor (1) is a control circuit based on a single-chip microcomputer of model STM32F103C8T6.

3. The multi-functional vehicle-mounted refrigerator control system according to claim 1, characterized in that, The photoelectric sensor (3) is installed on the side of the refrigerator door or next to the slide rail.

4. The multi-functional vehicle-mounted refrigerator control system according to claim 1, characterized in that, The wireless communication module (6) is a 4G / 5G wireless communication module.

5. The multi-functional vehicle-mounted refrigerator control system according to claim 1, characterized in that, The piezoelectric detection module (7) is a force-sensitive resistor.

6. The multi-functional vehicle-mounted refrigerator control system according to claim 1, characterized in that, The power module (9) includes a 24V to 5V DC circuit based on the AP1501-3.3 chip and a 5V to 3.3V DC circuit based on the ME6211C33M5G-N chip.

7. The multi-functional vehicle-mounted refrigerator control system according to claim 1, characterized in that, The voice acquisition and broadcasting module (10) is a chip with model number HLK-V20-SUIT.

8. The multi-functional vehicle-mounted refrigerator control system according to claim 1, characterized in that, The motor drive module (11) is a motor drive circuit based on the A4950ELJTR-T chip.

9. The multi-functional vehicle-mounted refrigerator control system according to claim 1, characterized in that, The piezoelectric detection module (7) is installed at the end of the refrigerator door slide rail.

10. The multi-functional vehicle-mounted refrigerator control system according to claim 1, characterized in that, The power module (9) is powered by a rechargeable battery.

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