Control circuit for a vehicle refrigeration unit and vehicle refrigeration unit
By using a multi-power supply chip design and intelligent power management, the energy waste problem of vehicle-mounted cooling equipment in standby or sleep mode is solved, power management in low-power mode is realized, the stability of the circuit and energy utilization efficiency are improved, and fast response and data retention are ensured.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU MIDEA HUALING REFRIGERATOR
- Filing Date
- 2025-08-12
- Publication Date
- 2026-07-21
Smart Images
Figure CN224528601U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electronic circuit technology, and in particular to the control circuit of vehicle-mounted refrigeration equipment and vehicle-mounted refrigeration equipment. Background Technology
[0002] With the widespread adoption of automobiles, the number of in-vehicle electrical appliances is also increasing. In-vehicle cooling equipment is one of the commonly used in-vehicle electrical appliances. For in-vehicle cooling equipment, its power consumption during standby or sleep mode should be as low as possible when not in use. This places demands on the rationalization and optimization of the power supply design for in-vehicle cooling equipment.
[0003] Currently, vehicle-mounted refrigeration equipment generally uses a single power supply. In this mode, all modules share the same power source, which can easily lead to unnecessary energy waste during standby or sleep modes. Utility Model Content
[0004] This application aims to address at least one of the technical problems existing in the related art. To this end, this application proposes a control circuit for an in-vehicle cooling device, which realizes intelligent power management in low power consumption or sleep mode, ensuring that the control chip is not powered on while the peripheral circuits are not powered on, thereby improving the working stability and reliability of the circuit.
[0005] This application also proposes an on-board refrigeration device.
[0006] The control circuit of the vehicle-mounted refrigeration device according to the first aspect of this application includes: a vehicle-mounted refrigeration device power supply for providing a power supply voltage; a first power supply chip connected to the vehicle-mounted refrigeration device power supply for providing a first voltage; a second power supply chip connected to the vehicle-mounted refrigeration device power supply for providing a second voltage; a control chip connected to the first power supply chip; and a first load module connected to the second power supply chip. The control chip is connected to the second power supply chip. When the vehicle-mounted refrigeration device enters a low-power or sleep state, the control chip controls the second power supply chip to stop providing the second voltage.
[0007] According to the control circuit of the vehicle-mounted refrigeration device in the embodiment of this application, the control chip is powered by multiple power supply chips, and the control chip is powered by a single chip. This realizes intelligent power management in low power consumption or sleep mode, ensuring that the control chip is not powered on while the peripheral circuit is not powered on, thereby improving the working stability and reliability of the circuit.
[0008] According to one embodiment of this application, it further includes: a third power supply chip connected to the second power supply chip, used to provide a third voltage; wherein the second voltage and the third voltage are different; and a second load module connected to the third power supply chip.
[0009] According to one embodiment of this application, it further includes: a third load module, connected to the power supply of the vehicle-mounted refrigeration equipment.
[0010] According to one embodiment of this application, it further includes: a communication chip, connected to the power supply of the vehicle-mounted cooling device.
[0011] According to one embodiment of this application, it further includes: when the vehicle-mounted refrigeration device enters a normal operating state, the control chip is used to control the second power supply chip to provide a second voltage.
[0012] According to one embodiment of this application, the communication chip is used to receive a first control command sent by the vehicle central control system via a bus; the control chip is used to respond to the first control command and control the vehicle cooling device to enter a low-power or sleep state.
[0013] According to one embodiment of this application, the communication chip is used to receive a second control command sent by the vehicle central control system via a bus in a low-power or sleep state; the control chip is used to respond to the second control command to control the vehicle cooling device to switch from a low-power or sleep state to a normal operating state.
[0014] According to one embodiment of this application, the control chip is used to issue a third control command based on the status information of the vehicle-mounted cooling device, and in response to the third control command, control the vehicle-mounted cooling device to enter a low-power or sleep state; the control chip is also used to send the third control command and the execution result of the corresponding third control command to the vehicle central control system via a bus.
[0015] The vehicle-mounted refrigeration device according to the second aspect of this application includes the control circuit of the vehicle-mounted refrigeration device described above.
[0016] According to one embodiment of this application, the vehicle-mounted refrigeration device is a vehicle-mounted refrigerator.
[0017] The above-described one or more technical solutions in the embodiments of this application have at least one of the following technical effects:
[0018] By employing a multi-power supply chip design and combining intelligent power management, this application can cut off the power supply to unnecessary modules in low-power or sleep mode, effectively reducing energy consumption.
[0019] By controlling the second power supply chip through the control chip, the control chip is powered independently, realizing intelligent power management in low power consumption or sleep mode. Compared with the single power management mode, this control method can more accurately control the power distribution, reduce unnecessary energy consumption, and help improve the energy utilization efficiency of the vehicle.
[0020] By continuously supplying power to the control chip through the first power supply chip, low power consumption is achieved while the control chip remains powered on. It can retain important data or processes as needed and achieve a faster standby response speed.
[0021] The design employs multiple voltages, providing different voltages for each component, enabling the control chip and load module to operate independently according to their respective needs. This collaborative approach not only improves circuit stability but also meets the voltage requirements of different modules, enhancing the circuit's flexibility and efficiency.
[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is one of the structural schematic diagrams of the control circuit of the vehicle-mounted refrigeration equipment provided in the embodiments of this application.
[0025] Figure 2 This is the second schematic diagram of the control circuit of the vehicle-mounted refrigeration equipment provided in the embodiments of this application.
[0026] Figure 3 This is a schematic diagram of the structure of the vehicle-mounted refrigeration equipment provided in the embodiments of this application.
[0027] Figure 4 This is a schematic diagram of the structure of the vehicle-mounted refrigerator provided in the embodiments of this application. Detailed Implementation
[0028] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.
[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0030] Please see Figure 1 , Figure 1 This is one of the structural schematic diagrams of the control circuit of the vehicle-mounted refrigeration device provided in the embodiments of this application. In this embodiment, the control circuit of the vehicle-mounted refrigeration device may include a vehicle-mounted refrigeration device power supply 110, a first power supply chip 120, a second power supply chip 130, a control chip 140, and a first load module 150.
[0031] The vehicle-mounted refrigeration equipment power supply 110 is used to provide power voltage.
[0032] The first power supply chip 120 is connected to the vehicle-mounted refrigeration equipment power supply 110 and is used to provide a first voltage according to the power supply voltage.
[0033] The second power supply chip 130 is connected to the vehicle-mounted refrigeration equipment power supply 110 and is used to provide a second voltage according to the power supply voltage.
[0034] The control chip 140 is connected to the first power supply chip 120 and is used to operate using the first voltage.
[0035] The first load module 150 is connected to the second power supply chip 130 and is used to operate using the second voltage.
[0036] The control chip 140 is connected to the second power supply chip 130; when the vehicle cooling device enters a low power consumption or sleep state, the control chip 140 controls the second power supply chip 130 to stop providing the second voltage.
[0037] Vehicle-mounted refrigeration equipment can include vehicle-mounted refrigerators, vehicle-mounted air conditioners, etc.
[0038] The power supply chip can be a power management chip, which can realize voltage conversion and stabilization. Optionally, the power supply chip can include a buck converter, a boost converter, and / or a voltage regulator.
[0039] A buck converter can convert a higher input voltage to a lower output voltage.
[0040] A boost converter can convert a lower input voltage into a higher output voltage.
[0041] A voltage regulator ensures that the output voltage remains stable within a certain range, even if the input voltage or load current changes. In this embodiment, the first power supply chip 120 only supplies power to the control chip 140, meaning that the control chip 140 can maintain a continuous power supply even in low-power or sleep mode. This is to ensure that the on-board cooling device can always maintain control over the system. In low-power mode, the sleep current of the on-board cooling device can be as low as μA (microamps). However, those skilled in the art should understand that the specific current value will vary depending on the selected components.
[0042] Furthermore, as the core control unit of the vehicle-mounted refrigeration equipment, the control chip 140 can not only accurately regulate the working status of the vehicle-mounted refrigeration equipment, but also realize power management functions, enabling intelligent switching and management of power for different working states of the vehicle-mounted refrigeration equipment.
[0043] Optionally, the control chip 140 can be a microcontroller unit (MCU), which integrates a central processing unit, memory, input / output interfaces, and other functional modules onto a single chip to form a complete microcomputer system. It can execute preset program instructions, process input signals, and drive external devices through the output interface to achieve specific control functions.
[0044] The second power supply chip 130 is a power supply chip for other controlled loads and peripherals of the vehicle-mounted refrigeration equipment. The first load module 150 includes, but is not limited to, indicator lights (LEDs) and fans (FANs). The second power supply chip 130 may include an enable pin EN, which is controlled by the control chip 140. Controlling this pin controls the power supply to the peripheral circuits.
[0045] Optionally, the second power supply chip 130 can be a DC-DC power supply chip, which is an integrated circuit chip that can convert one DC voltage into another or several different DC voltages to meet the different voltage requirements of different modules and achieve efficient power conversion and distribution.
[0046] Specifically, when the vehicle-mounted cooling device enters normal operating state, the control chip 140 can be used to control the second power supply chip 130 to provide the second voltage; when the vehicle-mounted cooling device enters low power consumption or sleep state, the control chip 140 can be used to control the second power supply chip 130 to stop providing the second voltage.
[0047] It should be noted that the low-power or sleep state in this embodiment refers to a state where the device consumes less energy when it is not turned off. This state can be entered by the user or automatically by the device after a period of inactivity. In this state, some functions of the device may be limited or suspended to reduce energy consumption, while keeping the device in a state of waiting for operation or instructions.
[0048] Normal operating state refers to the state in which all functions of the equipment are activated and operable, the equipment is in a fully operational and responsive state, and can perform all the functions and tasks designed for it.
[0049] In related technologies, most control boards are generally powered by a single power supply chip. For low power consumption, there are currently two main solutions:
[0050] 1. Continuous operation of the power conversion chip: The power conversion chip is always operational. Even when the device is not in use, there is still a certain amount of standby current. Although the main control chip can enter sleep mode, other peripherals directly connected to the power supply (such as analog-to-digital converter (ADC) acquisition circuits, other controlled modules, etc.) will still generate standby current. In this case, the low-power current of the entire device is usually above 1mA or even 10mA, making it impossible to achieve the ideal low-power state.
[0051] 2. Controlling the power chip enable pin via pins: This method utilizes the pin control function of the communication chip to enable or disable the power chip. While this approach achieves lower power consumption, it results in a direct power-off of the main control chip. Upon power-up, the entire system needs to be reinitialized, including hardware initialization, which slows down system response. During initialization, the system needs to reallocate resources such as memory and interrupts, consuming additional time and computational resources.
[0052] Therefore, both of the above low-power implementation schemes have some problems. The first scheme's low-power performance is not ideal and cannot achieve lower standby power consumption. Although the second scheme can achieve a more ideal low-power value, it requires interrupting the entire power supply system, forcing the system to perform initialization operations upon power-up. This includes initializing hardware devices, which slows down the system response. Furthermore, during initialization, the system also needs to reallocate resources such as memory and interrupts, which consumes additional time and computing resources.
[0053] Furthermore, the power outage resulted in the loss of all threads and data. This may necessitate recalculating or retrieving previously completed tasks, increasing the system's workload. If any incomplete operations or data are not properly saved, it could lead to data consistency issues, impacting system reliability. Simultaneously, it increases the system's dependence on external triggers, potentially causing it to malfunction without them, thus reducing the robustness of the product software.
[0054] Therefore, this embodiment provides a control circuit for an in-vehicle cooling device, employing a multi-power supply chip design: a first power supply chip continuously supplies power to the control chip, and the control chip controls the power supply to the second power supply chip, enabling more precise control of power distribution and achieving intelligent power management in low-power or sleep modes. In low-power or sleep modes, power to unnecessary modules is cut off, effectively reducing energy consumption; simultaneously, the control chip remains powered, allowing it to retain important data or processes as needed and achieve faster standby response speeds. Compared to a single power management mode, this control circuit reduces unnecessary energy consumption and helps improve the vehicle's energy efficiency.
[0055] Furthermore, this embodiment can also employ a multi-voltage design, where the power supply voltage provided by the vehicle-mounted refrigeration equipment power supply, the first voltage provided by the first power supply chip, and the second voltage provided by the second power supply chip can be the same or different. When the first voltage and the second voltage are different, different voltages can be provided respectively, allowing the control chip and the load module to operate independently according to their respective needs. This collaborative working method not only improves the stability of the circuit but also meets the voltage requirements of different modules, enhancing the flexibility and efficiency of the circuit.
[0056] According to one embodiment of this application, the control circuit of the vehicle-mounted refrigeration equipment may further include a third power supply chip and a second load module.
[0057] Specifically, the third power supply chip is connected to the second power supply chip. The third power supply chip can be used to provide a third voltage based on the second voltage; wherein the second voltage and the third voltage are different.
[0058] The second load module is connected to the third power supply chip. The second load module can be used to operate using the third voltage.
[0059] In this embodiment, a second load module may also be provided. The second load module operates at a different voltage than the first load module, therefore a third power supply chip is also required to perform voltage conversion. The second power supply chip supplies power to the first load module and also supplies power to the third power supply chip, thereby providing power to the second load module (e.g., peripheral circuits of a microcontroller that require 5V to operate).
[0060] The third power supply chip can be considered as a power supply chip for the peripheral components of the microcontroller (5V in this example), such as sensor circuits and indicator lights, because these circuits also generate small currents when they are working or powered on. In this way, after the second power supply chip is turned off (stops power supply), the third power supply chip is also turned off (stops power supply), thus completely cutting off unnecessary current loops.
[0061] According to one embodiment of this application, the control circuit of the vehicle-mounted refrigeration equipment may further include a third load module.
[0062] The third load module is connected to the power supply of the vehicle's refrigeration equipment and is used to operate using the power supply voltage.
[0063] In this embodiment, a third load module may also be provided. The third load module can be directly powered by the power supply of the vehicle-mounted refrigeration equipment, that is, the power supply voltage can meet the working voltage of the third load module.
[0064] Optionally, when the vehicle-mounted refrigeration equipment is a vehicle-mounted refrigerator, the third load module can be a refrigerator compressor.
[0065] According to one embodiment of this application, the control circuit of the vehicle-mounted refrigeration device may further include a communication chip.
[0066] The communication chip connects to the power supply of the vehicle's refrigeration equipment, and the communication chip is used to operate using the power supply voltage.
[0067] In this embodiment, a communication chip is also provided. The communication chip can be directly powered by the power supply of the vehicle-mounted refrigeration equipment, that is, the power supply voltage can meet the operating voltage of the communication chip.
[0068] In some embodiments, the communication chip can be used to receive a first control command sent by the vehicle's central control system via a bus; the control chip can be used to respond to the first control command and control the vehicle's cooling equipment to enter a low-power or sleep state.
[0069] The communication chip can receive the first control commands sent by the vehicle's central control system via the bus. The communication chip has the ability to communicate with the vehicle's central control system and can parse the command signals issued by the system. Bus communication makes command transmission highly efficient and reliable, suitable for the complex electromagnetic environment inside a vehicle and scenarios involving multiple interconnected devices.
[0070] Based on the first control command received, the control chip controls the vehicle-mounted cooling device to enter a low-power or sleep state. The control chip accurately understands the commands forwarded by the communication chip and controls the power management module of the vehicle-mounted cooling device accordingly. The control chip is powered independently, enabling the device to switch between low-power operating modes, demonstrating its precise control over the device's power status.
[0071] In some embodiments, the communication chip can be used to receive a second control command sent by the vehicle's central control system via a bus in a low-power or sleep state; the control chip can be used to respond to the second control command to control the vehicle's cooling equipment to switch from a low-power or sleep state to a normal operating state.
[0072] Even when the vehicle's cooling system is in low-power or sleep mode, the communication chip can still receive secondary control commands sent by the vehicle's central control system via the bus. The communication chip maintains a certain level of communication functionality in low-power mode, ensuring that the device can respond promptly to the central control system's wake-up command and maintain the continuity of the communication link between the device and the central control system.
[0073] Upon receiving the second control command, the control chip can switch the on-board cooling device from a low-power or sleep state to a normal operating state. The control chip has the ability to quickly wake up the device, rapidly adjusting its operating mode and restoring normal cooling function after receiving a wake-up command, ensuring the device can respond promptly to user needs.
[0074] In some embodiments, the control chip can be used to issue a third control command based on the status information of the vehicle-mounted cooling device, and in response to the third control command, control the vehicle-mounted cooling device to enter a low-power or sleep state; the control chip can also be used to send the third control command and the execution result of the corresponding third control command to the vehicle's central control system via a bus.
[0075] The communication chip is also responsible for receiving third-party control commands from the control chip. This demonstrates the communication chip's bridging role in the internal command transmission of the system, forwarding the decision commands made by the control chip based on the status information of the on-board cooling equipment.
[0076] The control chip can autonomously issue third control commands based on the status information of the on-board refrigeration equipment, and can send these commands and their execution results to the vehicle's central control system via a bus. The control chip possesses a certain degree of intelligent decision-making capability, enabling it to make reasonable control decisions based on the real-time status of the equipment, and to exchange information with the central control system through a communication chip. This achieves real-time monitoring and remote management of the equipment status, improving the system's automation and intelligence levels.
[0077] In the control circuit of this embodiment, the communication chip and the control chip cooperate to form a closed-loop control and communication system. The communication chip is responsible for receiving and forwarding instructions, while the control chip is responsible for parsing and executing instructions and providing status information feedback. Their collaborative work enables the in-vehicle refrigeration equipment to flexibly switch between different operating states and maintain close communication with the vehicle's central control system, achieving efficient management and control of the in-vehicle refrigeration equipment.
[0078] For example, when the user manually selects or the system automatically determines that the device needs to enter a low-power or sleep state, the vehicle's Body Control Module (BCM) sends data to the communication chip via the bus. After receiving the instruction, the control chip controls the enable pin of the second power supply chip to stop supplying power to the second power supply chip. The control chip also sends a low-power instruction to the communication chip. Then, it retains the critical processes or data and enters a low-power state.
[0079] When the user issues a wake-up command, the communication chip can automatically wake up according to the wake-up command. The control chip can receive the wake-up command normally in a low-power state. The control chip controls the enable pin of the second power supply chip, so that the second control chip enters the working state and starts to supply power to other peripheral components, thus the system components enter the normal working state.
[0080] Please see Figure 2 , Figure 2This is a second schematic diagram of the control circuit of the vehicle-mounted refrigeration device provided in this application embodiment. In this embodiment, the control circuit of the vehicle-mounted refrigeration device may include a vehicle-mounted refrigeration device power supply 110, a first power supply chip 120, a second power supply chip 130, a control chip 140, a first load module 150, a third power supply chip 160, a second load module 170, a third load module 180, and a communication chip 190.
[0081] The vehicle-mounted refrigeration equipment power supply 110 provides power voltage V0 to the first power supply chip 120, the second power supply chip 130, the third load module 180, and the communication chip 190. The first power supply chip 120, the second power supply chip 130, the communication chip 190, and the third load module 180 operate using the power supply voltage V0.
[0082] The first power supply chip 120 provides a first voltage V1 to the control chip 140. The control chip 140 operates using the first voltage V1.
[0083] The second power supply chip 130 provides a second voltage V2 to both the first load module 150 and the third power supply chip 160. The first load module 150 and the third power supply chip 160 operate using the second voltage V2.
[0084] The third power supply chip 160 provides a third voltage V3 to the second load module 170. The second load module 170 operates using the third voltage V3.
[0085] The control chip 140 can communicate with the communication chip 190 to send and receive data and commands. The control chip 140 enables the second power supply chip 130, and controls the power supply to the peripheral circuits by controlling the power supply of the second power supply chip 130. Specific control methods can be found in the above embodiments, and will not be repeated here.
[0086] In addition, the control chip 140 is also connected to the first load module 150, the second load module 170 and the third load module 180 respectively to realize the control of each load module.
[0087] The above design of the control circuit for vehicle-mounted refrigeration equipment can optimize the power consumption and operational stability of the equipment, ensuring that important processes and data are not lost even in low-power conditions.
[0088] On the other hand, embodiments of this application also provide an in-vehicle refrigeration device. Please refer to... Figure 3 , Figure 3 This is a schematic diagram of the structure of the vehicle-mounted refrigeration equipment provided in the embodiments of this application.
[0089] In this embodiment, the vehicle-mounted refrigeration device 100 includes the control circuit of the vehicle-mounted refrigeration device described above. For details, please refer to the above embodiment; further elaboration is omitted here.
[0090] Specifically, the vehicle-mounted refrigeration device 100 can communicate with the vehicle's central control system 200 via the communication chip 190.
[0091] Optionally, the vehicle-mounted refrigeration equipment is a vehicle-mounted refrigerator.
[0092] Based on the design of the aforementioned control circuit, this embodiment enables ultra-low power operation of the vehicle refrigerator, achieving a minimum standby current of less than 0.1mA in standby mode, thereby effectively reducing the wear and tear on the car battery. Simultaneously, the control circuit ensures the overall stability of the vehicle refrigerator remains unaffected, preserving important processes and data, and guaranteeing software robustness. Furthermore, through a controllable power supply chip for peripheral components, the MCU can control the power supply of all non-essential peripheral circuits in a low-power state, further reducing energy consumption. Compared with existing related technologies, this control circuit significantly improves the operational stability and reliability of the vehicle refrigerator.
[0093] Please see Figure 4 , Figure 4 This is a schematic diagram of the structure of the vehicle-mounted refrigerator provided in the embodiments of this application.
[0094] This embodiment uses a car refrigerator as an example for further explanation. The car 400 includes a central control system 420 and a car refrigerator. The car 400, as the carrier of the entire system, provides the necessary physical space and physical interfaces for the central control system 420 and the car refrigerator.
[0095] The vehicle refrigerator may include a vehicle refrigerator power supply 411, a first power supply chip 412, a second power supply chip 413, a third power supply chip 416, a control chip 414, a communication chip 419, a first load module 415, a second load module 417, and a third load module 418.
[0096] Furthermore, the third load module 418 is the refrigerator compressor.
[0097] The vehicle refrigerator power supply 411 provides power to the vehicle refrigerator. Specifically, the vehicle refrigerator power supply 411 provides power voltage to the communication chip 419, the first power supply chip 412, the second power supply chip 413, and the third load module 418.
[0098] The first power supply chip 412 is used to obtain power from the vehicle refrigerator power supply 411 and is specifically responsible for providing power to the control chip 414.
[0099] The second power supply chip 413 is used to obtain power from the vehicle refrigerator power supply 411 and to perform voltage conversion to provide 12V power to the first load module 415 and the third power supply chip 416.
[0100] The third power supply chip 416 is used to obtain 12V power from the second power supply chip 413 and perform voltage conversion to provide 5V power to the second load module 417.
[0101] It should be noted that the first load module 415 and the second load module 417 are both external loads or peripheral circuit modules of the control chip 414. The difference is that the first load module 415 and the second load module 417 operate at different voltages, so different power supply chips are required to provide different voltages.
[0102] The vehicle's central control system 420 can communicate with the vehicle refrigerator's control chip 414 via the communication chip 419 to send and receive control commands.
[0103] The control chip 414 can be connected to the first load module 415, the second load module 417 and the third load module 418 respectively to realize the control of each load module.
[0104] In addition, the control chip 414 can also enable the second power supply chip 413. The control chip 414 can control whether the second power supply chip 413 supplies power to the first load module 415 and the third power supply chip 416 through the enable signal.
[0105] For example, when the enable signal is high, the second power supply chip 413 starts working and can supply power to the first load module 415 and the third power supply chip 416; when the enable signal is low, the second power supply chip 413 stops working and can cut off the power supply to the first load module 415 and the third power supply chip 416.
[0106] The embodiments of this application provide a control circuit and an in-vehicle refrigeration device. Employing a multi-power supply chip design combined with intelligent power management, it can cut off power to unnecessary modules in low-power or sleep modes, effectively reducing energy consumption. By controlling the second power supply chip through the control chip, the control chip is powered independently, achieving intelligent power management in low-power or sleep modes. Compared to a single power management mode, this control method can more accurately control power distribution, reduce unnecessary energy consumption, and help improve the vehicle's energy efficiency. By continuously powering the control chip through the first power supply chip, low power consumption is achieved while ensuring the control chip remains powered, allowing it to retain important data or processes as needed and achieve faster standby response speeds. The multi-voltage design provides different voltages, enabling the control chip and load modules to work independently according to their respective needs. This collaborative working method not only improves circuit stability but also meets the voltage requirements of different modules, improving circuit flexibility and efficiency.
[0107] Finally, it should be noted that the above embodiments are only used to illustrate this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application and should be covered within the scope of the claims of this application.
Claims
1. A control circuit for an on-board refrigeration device, characterized in that, include: The power supply for the vehicle-mounted refrigeration equipment is used to provide power voltage; The first power supply chip is connected to the power supply of the vehicle-mounted refrigeration equipment and is used to provide the first voltage; The second power supply chip is connected to the power supply of the vehicle-mounted refrigeration equipment and is used to provide a second voltage; The control chip is connected to the first power supply chip; The first load module is connected to the second power supply chip; The control chip is connected to the second power supply chip; When the vehicle-mounted cooling device enters a low-power or sleep state, the control chip controls the second power supply chip to stop providing the second voltage.
2. The control circuit of the vehicle-mounted refrigeration equipment according to claim 1, characterized in that, Also includes: The third power supply chip is connected to the second power supply chip and is used to provide a third voltage; The second voltage and the third voltage are not the same; The second load module is connected to the third power supply chip.
3. The control circuit of the vehicle-mounted refrigeration equipment according to claim 1, characterized in that, Also includes: The third load module is connected to the power supply of the vehicle-mounted refrigeration equipment.
4. The control circuit of the vehicle-mounted refrigeration equipment according to claim 1, characterized in that, Also includes: A communication chip is connected to the power supply of the vehicle-mounted refrigeration equipment.
5. The control circuit of the vehicle-mounted refrigeration device according to any one of claims 1 to 4, characterized in that, Also includes: When the vehicle-mounted refrigeration equipment enters normal operating condition, the control chip is used to control the second power supply chip to provide the second voltage.
6. The control circuit of the vehicle-mounted refrigeration equipment according to claim 4, characterized in that, The communication chip is used to receive the first control command sent by the vehicle's central control system via the bus; The control chip is used to respond to the first control command and control the vehicle-mounted cooling device to enter a low-power or sleep state.
7. The control circuit of the vehicle-mounted refrigeration equipment according to claim 4, characterized in that, The communication chip is used to receive a second control command sent by the vehicle's central control system via a bus in a low-power or sleep state. The control chip is used to respond to the second control command and control the vehicle-mounted cooling device to switch from a low-power or sleep state to a normal operating state.
8. The control circuit of the vehicle-mounted refrigeration equipment according to claim 4, characterized in that, The control chip is used to issue a third control command based on the status information of the vehicle-mounted cooling device, and in response to the third control command, control the vehicle-mounted cooling device to enter a low-power or sleep state. The control chip is also used to send the third control command and the execution result of the corresponding third control command to the vehicle's central control system via a bus.
9. A vehicle-mounted refrigeration device, characterized in that, Includes the control circuit of the vehicle-mounted refrigeration device as described in any one of claims 1 to 8.
10. The vehicle-mounted refrigeration equipment according to claim 9, characterized in that, The vehicle-mounted refrigeration equipment is a vehicle-mounted refrigerator.