Low-power consumption vehicle-mounted refrigeration device and control circuit thereof

Abstract

The application relates to the field of electronic circuits, and provides a low-power-consumption vehicle-mounted refrigeration device and a control circuit thereof, and the control circuit of the low-power-consumption vehicle-mounted refrigeration device comprises a vehicle-mounted power supply for providing a power supply voltage, a display interaction module connected with the vehicle-mounted power supply, the display interaction module comprising a display screen, a control chip and a first power supply chip, the display screen and the control chip being connected with the first power supply chip respectively, and the first power supply chip being used for providing a first voltage; a second power supply chip connected with the vehicle-mounted power supply and the control chip respectively and used for providing a second voltage; and a control module connected with the second power supply chip and used for controlling a load module; wherein when the low-power-consumption vehicle-mounted refrigeration device enters a standby state, the control chip controls the second power supply chip to stop providing the second voltage. The display interaction module is powered separately, the control chip of the display interaction module is ensured to be continuously powered, other loads are not powered on, and ultra-low power consumption is realized; and the display interaction module improves the interactivity and convenience between a user and the device.

Description

Technical Field

[0001] This application relates to the field of electronic circuit technology, and in particular to low-power vehicle-mounted cooling equipment and its control circuit. 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, in-vehicle cooling systems have significant shortcomings in terms of low-power design and ease of user operation. Regarding low-power design, they lack targeted voltage supply and intelligent power control strategies, often employing a single power supply mode. In this mode, all modules share the same power source, and the entire system continues to power the device even when it is in standby mode, resulting in continuous power consumption even when the device is not in operation, failing to effectively reduce power consumption. In terms of user operation, the devices typically lack an intuitive display interface, and users must activate the device through the vehicle's infotainment screen, making it difficult to meet the needs for convenient operation. 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 a low-power vehicle-mounted cooling device, which can achieve ultra-low power consumption while facilitating user operation and monitoring of the low-power vehicle-mounted cooling device, thereby improving the interactivity and convenience between the user and the device.

[0005] This application also proposes a low-power vehicle-mounted cooling device.

[0006] The control circuit of the low-power vehicle-mounted cooling device according to the first aspect of this application includes: a vehicle-mounted power supply for providing a power supply voltage; a display interaction module connected to the vehicle-mounted power supply; the display interaction module includes a display screen, a control chip, and a first power supply chip; wherein the display screen and the control chip are respectively connected to the first power supply chip, and the first power supply chip is used to provide a first voltage; a second power supply chip is respectively connected to the vehicle-mounted power supply and the control chip, and is used to provide a second voltage; a control module connected to the second power supply chip, and is used to control a load module; wherein, when the low-power vehicle-mounted cooling device enters a standby state, the control chip controls the second power supply chip to stop providing the second voltage.

[0007] The control circuit of the low-power vehicle-mounted cooling device according to the embodiments of this application adopts multiple power supply chips, and the display interaction module is powered separately, realizing intelligent power management in standby mode. This ensures that the control chip is not powered on while other loads are not powered on, thereby achieving ultra-low power consumption. In addition, this application sets up a display interaction module, which allows users to interact with the device. The module can quickly respond to and process user operations, improving the interactivity and convenience between the user and the device.

[0008] According to one embodiment of this application, the display interaction module further includes an input module, which is used to generate control commands based on user input information; the control chip is connected to the control module and the input module respectively, and is used to control the low-power vehicle cooling device to enter or exit the standby state according to the control commands.

[0009] According to one embodiment of this application, the control instruction includes a first control instruction; the control chip is used to respond to the first control instruction and control the low-power vehicle cooling device to enter a standby state.

[0010] According to one embodiment of this application, the control instruction includes a second control instruction; the control chip is used to respond to the second control instruction and control the low-power vehicle cooling device to switch from a standby state to a normal operating state.

[0011] According to one embodiment of this application, the display interaction module further includes a communication chip; the communication chip is connected to the first power supply chip and the vehicle central control system respectively.

[0012] According to one embodiment of this application, the communication chip is used to receive a third control command sent by the vehicle central control system via a bus; the control chip is used to respond to the third control command and control the low-power vehicle cooling device to enter a standby state.

[0013] According to one embodiment of this application, the communication chip is used to receive a fourth control command sent by the vehicle central control system via a bus; the control chip is used to respond to the fourth control command and control the low-power vehicle cooling device to switch from a standby state to a normal operating state.

[0014] According to one embodiment of this application, the load module includes at least a first load module and a second load module, the first load module and the second load module are different, and the first load module is a refrigeration compressor.

[0015] The low-power vehicle-mounted cooling device according to the second aspect of this application includes the control circuit of the low-power vehicle-mounted cooling device described above.

[0016] According to one embodiment of this application, the low-power vehicle cooling device is a low-power vehicle 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: Multiple power supply chips are used, with the display interaction module powered separately. This ensures that the control chip is not powered on while other loads are not powered on, realizing intelligent power management in standby mode and effectively reducing energy consumption. A display interaction module is provided, through which users can interact. The first power supply chip continuously supplies power to the display interaction module, which can quickly respond to and process user operations, improving the interactivity and convenience between users and the device. Furthermore, in standby mode, the display interaction module can also interact with the user, and the device can be directly woken up through the input module without operating the car's central control screen, making it convenient for the user.

[0018] 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

[0019] 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.

[0020] Figure 1 This is one of the structural schematic diagrams of the control circuit of the low-power vehicle-mounted cooling device provided in the embodiments of this application.

[0021] Figure 2 This is the second schematic diagram of the control circuit of the low-power vehicle-mounted cooling device provided in the embodiments of this application.

[0022] Figure 3 This is a schematic diagram of the structure of the low-power vehicle-mounted cooling device provided in the embodiments of this application. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] In related technologies, there are two main ways to achieve low power consumption in vehicle-mounted cooling equipment: (1) Continuous operation mode of power conversion chip: The power conversion chip is always in operation. When the device enters a low-power state, although the main control chip can enter sleep mode, other peripherals directly connected to the power supply, such as the ADC (Analog to Digital Converter) acquisition circuit and other controlled modules, still have a certain standby current. The low-power current of the whole machine is usually above 1mA or even 10mA. However, the advantage of this solution is that when an external interrupt is triggered (such as opening a door and turning on a light), the device can respond and resume the working process.

[0026] (2) Communication chip pin control mode: Other chips (mainly communication chips) have pin control functions, which can turn the power supply on or off by controlling the enable pin of the power chip. This solution allows the main control chip to be directly powered off, thereby achieving lower power consumption. Users can power on the main control chip again and put it into working state through external communication. Generally speaking, this design does not have a built-in display screen, and the working status of the car refrigerator needs to be set on the vehicle central control screen. Moreover, this solution cannot trigger the device to resume operation through external interrupt actions.

[0027] Therefore, current related technologies do not achieve ideal low power consumption, making it difficult to achieve even lower standby power consumption; or although they can achieve relatively ideal low power consumption, the device cannot be triggered to resume operation by external interruption, and the user needs to turn on the car screen to wake up the vehicle cooling device, which lacks flexibility and is inconvenient to operate.

[0028] Based on this, the embodiments of this application provide a low-power vehicle cooling device and its control circuit that can be controlled in coordination with hardware circuits to achieve standby power consumption in the sleep state at the microampere level. This can solve the problem of battery depletion after the vehicle is turned off, and also facilitate users to quickly wake up and operate the device when operating it or triggering external interruptions (such as button or touch screen operation).

[0029] Please see Figure 1 , Figure 1 This is one of the structural schematic diagrams of the control circuit of the low-power vehicle-mounted cooling device provided in the embodiments of this application.

[0030] In this embodiment, the control circuit of the low-power vehicle cooling device may include a vehicle power supply 110, a display interaction module 120, a second power supply chip 130, a control module 140, and a load module 150.

[0031] Vehicle-mounted refrigeration equipment can include vehicle-mounted refrigerators, vehicle-mounted air conditioners, etc.

[0032] Among them, the vehicle power supply 110 is used to provide power voltage.

[0033] The display interaction module 120 is connected to the vehicle power supply 110. The display interaction module 120 may include a display screen 121, a control chip 122 and a first power supply chip 123. The display screen 121 and the control chip 122 are respectively connected to the first power supply chip 123, and the first power supply chip 123 is used to provide a first voltage.

[0034] The display interaction module 120 may include an enable pin EN, which is controlled by the control chip 122. The control of this pin enables the control of the on / off state of the second power supply chip.

[0035] The second power supply chip 130 is connected to both the vehicle power supply 110 and the control chip 122 to provide a second voltage. The first voltage and the second voltage may be the same or different.

[0036] 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.

[0037] 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.

[0038] The control module 140 is connected to the second power supply chip 130 and is used to control the load module 150.

[0039] Specifically, when the low-power vehicle cooling device enters standby mode, the control chip 122 controls the second power supply chip to stop providing the second voltage.

[0040] In this embodiment, the vehicle power supply 110 is a module that provides power voltage to the control circuit of the entire low-power vehicle cooling device. The vehicle power supply 110 can come from the vehicle's power supply system or can be independently installed in the low-power vehicle cooling device.

[0041] The display interaction module 120 is used to realize the interaction and information display functions between the user and the low-power vehicle cooling device. The display interaction module 120 may include a display screen 121, a control chip 122, and a first power supply chip 123.

[0042] The display screen 121 serves as an interface for users to intuitively obtain operating status information of the low-power vehicle-mounted cooling device. Optionally, the operating status information may include information such as temperature and mode.

[0043] In some embodiments, the display screen 121 may also integrate operation input functions, such as a touch display screen. The display screen 121 can be an interface for users to simultaneously obtain device operating status information and perform operation input.

[0044] The control chip 122 is used to realize the overall control of the display interaction module 120. It can coordinate the display content and operation response of the display screen 121, and can also participate in the control of other modules, such as the operation of the control module 140.

[0045] The first power supply chip 123 is used to convert the power supply voltage provided by the vehicle power supply 110 into a first voltage and provide a stable first voltage for the display screen 121 and the control chip 122, so as to ensure that the display screen 121 and the control chip 122 can work normally.

[0046] The second power supply chip 130 connects the vehicle power supply 110 and the control chip 122, and is used to convert the power supply voltage provided by the vehicle power supply 110 into a second voltage suitable for the operation of the control module 140, and to supply power to the control module 140.

[0047] The control module 140 can receive the second voltage provided by the second power supply chip 130 and control the load module 150 according to the preset program and user operation instructions to realize various functions of the low-power vehicle cooling equipment.

[0048] The control module 140 and the control chip 122 can be the same or different models of microcontroller units (MCUs).

[0049] The load module 150 includes functional modules that implement specific cooling functions in low-power vehicle-mounted cooling equipment, such as compressors, indicator LEDs, fans, and so on, and can operate under the control of the control module 140.

[0050] Low-power vehicle cooling devices can include normal operating mode and standby mode.

[0051] The normal operating state refers to the mode in which the low-power vehicle-mounted cooling device can fully and effectively perform its core functions, such as cooling, according to the user's operating instructions or preset programs. In the normal operating state, all modules of the low-power vehicle-mounted cooling device cooperate and operate in an orderly manner to achieve the device's intended functions.

[0052] Specifically, under normal operating conditions, the vehicle power supply 110 provides power voltage to the entire control circuit. The first power supply chip 123 converts the voltage of the vehicle power supply 110 into a first voltage to power the display screen 121 and the control chip 122, enabling the display screen 121 to display the device's operating status information. Users can input operations through the display screen, and the control chip 122 can receive and process these operation commands.

[0053] The second power supply chip 130 converts the voltage of the vehicle power supply 110 into a second voltage to power the control module 140. After receiving power, the control module 140 can control the load module 150 according to the user's operation instructions or preset programs, enabling the load module to perform functions such as cooling.

[0054] Standby mode refers to a low-energy operating mode of low-power vehicle cooling equipment when it is not performing its main functions such as actual cooling. This could include low-power mode or sleep mode. In standby mode, the device does not completely stop working; rather, some modules cease operation to reduce overall power consumption.

[0055] The standby mode not only meets the need to reduce energy consumption and power consumption of the vehicle when the device is not in use, but also ensures that users can easily interact with the device when needed and quickly restore the device to normal operation.

[0056] Specifically, in standby mode, the control chip 122 can send a control signal to control the second power supply chip 130 to stop providing the second voltage. At this time, since the control module 140 relies on the second power supply chip 130 for power, the control module 140 stops working, and the load module 150 also stops running. However, the display screen 121 and the control chip 122 in the display interaction module 120 are still powered by the first power supply chip 123, maintaining basic standby display and response functions.

[0057] When the device enters standby mode, the control chip 122 controls the second power supply chip 130 to stop supplying power to the control module 140, causing the control module 140 and the load module 150 to stop operating. This significantly reduces the power consumption of the device in standby mode. Because the control module 140 and the load module 150 are usually the most power-consuming parts of the device, stopping their power supply can significantly reduce the overall power consumption, achieve the low-power design goal, and effectively reduce the consumption of the vehicle's power supply.

[0058] Even in standby mode, the display interaction module 120 is still powered by the first power supply chip 123. The display screen 121 can continue to display some basic standby information, such as the current status of the device. At the same time, the control chip 122 can also maintain a certain level of responsiveness, so that the user can operate it at any time to wake up the device and perform main functions such as cooling. This ensures low power consumption of the device in standby mode without affecting the user's basic interaction with the device, providing convenience for the user.

[0059] By precisely controlling the second power supply chip 130 through the control chip 122, a smooth switching between normal operation and standby states can be achieved. This orderly power management method can reduce the damage to the internal circuits and components of the equipment caused by frequent power fluctuations, improve the stability and reliability of the entire low-power vehicle cooling equipment control circuit, and extend the service life of the equipment.

[0060] The control circuit of the low-power vehicle-mounted cooling device in this embodiment uses multiple power supply chips, with the display interaction module powered separately. This achieves intelligent power management in standby mode, ensuring that the control chip is not powered while other loads are not powered, thus achieving ultra-low power consumption. In addition, this application provides a display interaction module, which allows users to interact with the device. This module enables rapid response and processing of user operations, improving the interactivity and convenience between the user and the device.

[0061] According to one embodiment of this application, the display interaction module further includes an input module, which is used to generate control commands based on user input information; the control chip is connected to the control module and the input module respectively, and is used to control the low-power vehicle cooling device to enter or exit the standby state according to the control commands.

[0062] In this embodiment, an input module is added to the display interaction module. The input module is a functional module for user interaction with the device. It can recognize various input information from the user, such as commands entered by the user through buttons, touch screens, etc., and then convert this input information into control commands that the control chip can recognize and process.

[0063] Optionally, the input module can be integrated with the display screen to simultaneously realize the input and output functions of user information.

[0064] Optionally, the operations that users can perform through the input module include, but are not limited to, pressing a specific standby button, performing specific gestures on the touchscreen, etc. Users input relevant information through the input module. After receiving this information, the input module processes it internally and converts it into control commands.

[0065] In some embodiments, when the device is in normal operating condition, the user can input operating information through the input module, such as setting the cooling temperature and selecting the cooling mode. The input module will convert this input information into control commands and send them to the control chip.

[0066] After receiving control commands, the control chip can send display-related instructions to the display screen, causing it to show corresponding information such as the user-set temperature value and selected mode. Simultaneously, it can also send commands to the control module to control the operation of the load module. The control module can then control the load module according to these commands, thereby achieving the cooling function required by the user.

[0067] In some embodiments, the user can input a command to put the device into standby mode through the input module, and the input module can convert the command into a control command and send it to the control chip.

[0068] Upon receiving the control command to enter standby mode, the control chip will control the second power supply chip to stop providing the second voltage. Since the control module relies on the second power supply chip for power, the control module stops working, the load module also stops operating, and the device enters standby mode. In standby mode, the display screen and control chip in the display interaction module are still powered by the first power supply chip. The display screen can continue to display basic standby information, and the control chip can maintain a certain level of responsiveness.

[0069] In some embodiments, the user can input a command to exit the standby state through the input module, which will then convert the command into a control command and send it to the control chip.

[0070] After receiving the control command to exit standby mode, the control chip will control the second power supply chip to resume providing the second voltage to power the control module. After the control module resumes operation, it will control the load module again according to the user's previous settings or new operation commands, so that the device resumes cooling and other functions, thus exiting standby mode.

[0071] In summary, the presence of the input module allows users to interact with the device more conveniently and directly without needing to operate the car's central control screen, thus improving the user experience. Users can control the device to enter or exit standby mode through the input module of the low-power vehicle cooling device itself, enabling flexible management of device power consumption.

[0072] According to one embodiment of this application, the control instruction includes a first control instruction; the control chip is used to respond to the first control instruction and control the low-power vehicle cooling device to enter a standby state.

[0073] In this embodiment, the first control command is a specific command input by the user through the input module, used to instruct the low-power vehicle cooling device to enter standby mode.

[0074] When a user needs to put the device into a low-power standby mode, they can perform a corresponding operation on the input module. The input module converts this operation into a first control command and sends it to the control chip. After receiving the first control command, the control chip can send a control signal to the second power supply chip, requesting it to stop providing the second voltage, thereby controlling the low-power vehicle cooling device to enter standby mode.

[0075] According to one embodiment of this application, the control instruction includes a second control instruction; the control chip is used to respond to the second control instruction and control the low-power vehicle cooling device to switch from a standby state to a normal operating state.

[0076] In this embodiment, the second control command is a specific command input by the user through the input module, used to instruct the low-power vehicle cooling device to switch from standby state to normal operating state.

[0077] When the device is in standby mode but the user needs to use the cooling function, they can operate it through the input module. The input module converts this operation into a second control command and transmits it to the control chip. After receiving the second control command, the control chip can send a control signal to the second power supply chip, requesting it to restart providing the second voltage, thereby controlling the low-power vehicle cooling device to switch from standby mode to normal operation mode.

[0078] According to one embodiment of this application, the display interaction module further includes a communication chip; the communication chip is connected to the first power supply chip and the vehicle central control system respectively.

[0079] In this embodiment, a communication chip is added to the display interaction module. The communication chip is connected to the first power supply chip and the vehicle central control system, which brings more functions and interactivity to the low-power vehicle cooling device.

[0080] The communication chip is connected to the first power supply chip, thus it can obtain a stable power supply from the first power supply chip, and can interact and communicate with the car's central control system even in standby mode.

[0081] In some embodiments, the low-power in-vehicle cooling device can transmit its operating status information to the vehicle's central control system via a communication chip. Therefore, the driver can intuitively understand the operating status of the in-vehicle cooling device on the vehicle's central control display screen, without needing to specifically check the device's display screen, thus improving the convenience of information access.

[0082] In some embodiments, the vehicle's central control system can also transmit relevant information to the communication chip of the onboard refrigeration device. The control chip of the refrigeration device can then optimize and adjust the refrigeration function based on this information, such as automatically adjusting the cooling intensity according to the ambient temperature and the required interior temperature when the vehicle is traveling at high speed.

[0083] In some embodiments, the driver can also control the low-power in-vehicle cooling system through the vehicle's central control system. This unified control approach improves the user's ease of operation and management efficiency of the overall vehicle equipment.

[0084] In summary, the communication chip enables the low-power in-vehicle cooling system and the vehicle's central control system to work together as a unified whole. Their data interaction and communication optimize vehicle energy management, enhance the user experience, and allow various vehicle systems to better cooperate, providing a more comfortable and convenient driving environment for the driver and passengers.

[0085] According to one embodiment of this application, the communication chip is used to receive a third control command sent by the vehicle central control system via a bus; the control chip is used to respond to the third control command and control the low-power vehicle cooling device to enter a standby state.

[0086] In the interaction between low-power in-vehicle cooling devices and the vehicle's central control system, communication chips can be used for information reception. The vehicle's central control system can send third-party control commands via buses. These buses, such as CAN and LIN buses, can be used for data transmission between devices in automotive electronic systems.

[0087] The communication chip is connected to the bus and can monitor the data information on the bus in real time. When it detects a third control command sent by the car's central control system, the communication chip will receive the third control command, perform preliminary processing, and then pass it to the control chip.

[0088] After receiving the third control command from the communication chip, the control chip sends a control signal to the second power supply chip, requesting it to stop providing the second voltage, thereby controlling the low-power vehicle cooling device to enter standby mode.

[0089] For example, when the driver makes settings on the vehicle's central control system, the central control system can send a third control command via the bus to put the low-power vehicle cooling device into standby mode.

[0090] For example, when the vehicle detects special circumstances, such as low battery power requiring a reduction in the power consumption of non-essential devices, the vehicle's central control system can also send a third control command to put the low-power vehicle cooling equipment into standby mode to save power.

[0091] According to one embodiment of this application, the communication chip is used to receive a fourth control command sent by the vehicle central control system via a bus; the control chip is used to respond to the fourth control command and control the low-power vehicle cooling device to switch from a standby state to a normal operating state.

[0092] Similar to the embodiments described above, the vehicle's central control system can send a fourth control command via a bus. The communication chip is connected to the bus and monitors the data dynamics on the bus in real time. When a fourth control command is detected from the vehicle's central control system, the communication chip receives and performs preliminary processing on the command before transmitting it to the control chip.

[0093] After receiving the fourth control command from the communication chip, the control chip can send a control signal to the second power supply chip, requesting it to restart providing the second voltage, thereby controlling the low-power vehicle cooling device to switch from standby mode to normal operation mode.

[0094] According to one embodiment of this application, the load module includes at least a first load module and a second load module, the first load module and the second load module are different, and the first load module is a refrigeration compressor.

[0095] In low-power automotive cooling devices, the load module is a key component for realizing the cooling function. The first load module and the second load module have different functions and can be powered by the same or different power supplies or power supply chips.

[0096] The first load module is a refrigeration compressor. The refrigeration compressor is the core component of the entire refrigeration cycle. Optionally, the first load module is powered by the vehicle's onboard power supply.

[0097] The first load module can be other loads besides the refrigeration compressor, such as cooling fans, peripheral LEDs, peripheral circuit sensors, etc.

[0098] Please see Figure 2 , Figure 2 This is the second schematic diagram of the control circuit of the low-power vehicle-mounted cooling device provided in the embodiments of this application.

[0099] In this embodiment, the control circuit of the low-power vehicle cooling device may include a vehicle power supply 110, a display interaction module 120, a second power supply chip 130, a control module 140, a first load module 151, and a second load module 152.

[0100] The display interaction module 120 may include a display screen 121, a control chip 122, a first power supply chip 123, an input module 124, and a communication chip 125.

[0101] The vehicle power supply 110 provides power voltage to the first power supply chip 123 and the second power supply chip 130. The first power supply chip 123 provides a first voltage to the display screen 121, the control chip 122, the input module 124, and the communication chip 125, respectively. The second power supply chip 130 provides a second voltage to the control module 140.

[0102] It should be noted that the first load module 151 and / or the second load module 152 can be powered by the vehicle power supply 110, or by the second power supply chip 130, or by other power supply chips besides the first power supply chip 123 and the second power supply chip 130.

[0103] Among them, the control chip 122 can be connected to the control module 140, and the communication chip 125 can be connected to the vehicle central control system 200.

[0104] The control circuit for the low-power vehicle-mounted refrigeration device provided in this application embodiment can achieve a standby current of less than 0.1mA for the vehicle-mounted refrigerator; control of the vehicle-mounted refrigeration device can be achieved using a display screen with LIN bus control; while achieving low power consumption, important data or processes can be retained as needed without affecting system stability.

[0105] On the other hand, embodiments of this application also provide a low-power vehicle-mounted cooling device, including the control circuit of the aforementioned low-power vehicle-mounted cooling device.

[0106] Alternatively, the low-power vehicle cooling device can be a low-power vehicle refrigerator.

[0107] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of the low-power vehicle-mounted cooling device provided in the embodiments of this application.

[0108] This embodiment uses a low-power in-vehicle refrigerator as an example for further explanation. The vehicle 300 includes a central control system 310 and a low-power in-vehicle refrigerator. The vehicle 300, as the carrier of the entire system, provides the necessary physical space and physical interfaces for the central control system 310 and the in-vehicle refrigerator.

[0109] The low-power vehicle refrigerator includes a vehicle refrigerator power supply 320, a vehicle refrigerator display screen 330 with a LIN bus, a second power supply chip 340, a control module 350, and a load module. The load module further includes a first load module 361, a second load module 362, and a third load module 363.

[0110] The vehicle refrigerator power supply 320 is connected to the vehicle refrigerator display screen 330 with LIN bus, the second power supply chip 340, the first load module 361 and the second load module 362 respectively, and is used to provide power voltage to the vehicle refrigerator display screen 330 with LIN bus, the second power supply chip 340, the first load module 361 and the second load module 362 respectively.

[0111] The second power supply chip 340 is connected to the third load module 361 and the control module 350 respectively, and is used to provide a second voltage to the third load module 361 and the control module 350.

[0112] The control module 350 is connected to the first load module 361, the second load module 362 and the third load module 363 respectively, and is used to implement command control of the first load module 361, the second load module 362 and the third load module 363.

[0113] The in-vehicle refrigerator display screen 330 with LIN bus is connected to the vehicle central control system 310 and control module 350 respectively, which can realize information interaction and sharing, unified control and management, thereby improving user experience and intelligence level.

[0114] In this embodiment, the vehicle-mounted refrigerator display screen 330 with LIN bus is the aforementioned display interaction module, which specifically includes a display screen, a first power supply chip, a control chip, an input module, and a communication chip. Specific functions are as described in the above embodiment and will not be repeated here.

[0115] For example, the vehicle-mounted refrigerator based on LIN bus communication in this application is a dual-power supply chip system, which may include the following parts: 1. A power supply system is composed of a DC-DC step-down regulator chip with an enable control port (such as the first power supply chip).

[0116] 2. A display screen system with LIN bus control.

[0117] 3. Main control and drive system: responsible for controlling and driving the entire system.

[0118] 4. Refrigerator refrigeration and sensor peripheral components system: including refrigerator refrigeration related equipment and various sensors and other peripheral components.

[0119] The vehicle control display screen with a LIN communication chip has control pins for the second power supply chip. The display screen has a separate power system (i.e., the first power supply chip) that powers the interactive system and its control chip. When the refrigerator is turned off, all electrical components except the display screen are powered off, aiming to minimize power consumption in the refrigerator's sleep state. In low-power mode, the display screen's standby current can be as low as μA, with specific values ​​varying depending on component selection.

[0120] The second power supply chip is a power supply chip that supplies power to other controlled loads and peripherals (such as LEDs and fans operating at 12V) in the system. It has an enable pin EN, which is controlled by the first power supply chip in the refrigerator circuit. The power supply to the peripheral circuit can be switched on or off by controlling this pin.

[0121] 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) can send data to the LIN communication chip on the refrigerator's display screen via the bus. Upon receiving the instruction, the MCU on the display screen controls the enable pin of the second power supply chip to stop supplying power, and simultaneously issues a low-power command, retaining only the wake-up function interface, thus putting the chip into a low-power state. At this time, the LIN communication chip and the display screen MCU enter sleep mode, and the refrigerator's main circuitry is powered off.

[0122] When a user issues a wake-up command through the interactive interface such as buttons on the central control screen or refrigerator display screen, the communication chip automatically wakes up according to the wake-up command, the display screen enables the second power supply chip to supply power to the power circuit, the display screen and refrigerator circuit resume working, and all components of the system enter normal working state.

[0123] Through the above methods, this application achieves ultra-low power consumption for the vehicle refrigerator, reducing vehicle battery wear and tear. The minimum standby current is <0.1mA. Compared to traditional methods, this improves the stability and reliability of the vehicle refrigerator. Furthermore, the refrigerator can be instantly woken up via its onboard display screen, eliminating the need to operate the vehicle's central control screen, thus enhancing user convenience. In addition, it can be expanded to a multi-channel power control system, enabling power combinations for different components to be implemented according to specific needs.

[0124] The embodiments of this application provide a low-power in-vehicle cooling device and its control circuit, employing multiple power supply chips, with the display interaction module powered separately. This ensures that the control chip remains powered while other loads are not, achieving intelligent power management in standby mode and effectively reducing energy consumption. The display interaction module allows users to interact with the device. Power is continuously supplied to the display interaction module by the first power supply chip, enabling rapid response and processing of user actions, improving interactivity and convenience between the user and the device. Furthermore, in standby mode, the display interaction module can also interact with the user, and the device can be directly woken up via the input module without needing to operate the car's central control screen, facilitating user operation.

[0125] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of software products. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0126] 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 a low-power vehicle-mounted cooling device, characterized in that, include: Onboard power supply, used to provide power voltage; The display interaction module is connected to the vehicle power supply. The display interaction module includes a display screen, a control chip, and a first power supply chip; wherein the display screen and the control chip are respectively connected to the first power supply chip, and the first power supply chip is used to provide a first voltage; The second power supply chip is connected to the vehicle power supply and the control chip respectively, and is used to provide a second voltage; The control module, connected to the second power supply chip, is used to control the load module; When the low-power vehicle cooling device enters standby mode, the control chip controls the second power supply chip to stop providing the second voltage.

2. The control circuit of the low-power vehicle-mounted cooling device according to claim 1, characterized in that, The display interaction module further includes an input module, which is used to generate control commands based on user input information. The control chip is connected to the control module and the input module respectively, and is used to control the low-power vehicle cooling device to enter or exit the standby state according to the control command.

3. The control circuit of the low-power vehicle-mounted cooling device according to claim 2, characterized in that, The control command includes a first control command; The control chip is used to respond to the first control command and control the low-power vehicle cooling device to enter a standby state.

4. The control circuit of the low-power vehicle-mounted cooling device according to claim 2, characterized in that, The control command includes a second control command; The control chip is used to respond to the second control command and control the low-power vehicle cooling device to switch from standby state to normal working state.

5. The control circuit of the low-power vehicle-mounted cooling device according to any one of claims 1 to 4, characterized in that, The display interaction module also includes a communication chip; The communication chip is connected to the first power supply chip and the vehicle's central control system, respectively.

6. The control circuit of the low-power vehicle-mounted cooling device according to claim 5, characterized in that, The communication chip is used to receive third control commands sent by the vehicle's central control system via the bus; The control chip is used to respond to the third control command and control the low-power vehicle cooling device to enter a standby state.

7. The control circuit of the low-power vehicle-mounted cooling device according to claim 5, characterized in that, The communication chip is used to receive the fourth control command sent by the vehicle's central control system via the bus; The control chip is used to respond to the fourth control command and control the low-power vehicle cooling device to switch from standby state to normal working state.

8. The control circuit of the low-power vehicle-mounted cooling device according to any one of claims 1 to 4, characterized in that, The load module includes at least a first load module and a second load module. The first load module and the second load module are different. The first load module is a refrigeration compressor.

9. A low-power vehicle-mounted cooling device, characterized in that, Including the low-power vehicle cooling device as described in any one of claims 1 to 8.

10. The low-power vehicle-mounted cooling device according to claim 9, characterized in that, The low-power vehicle-mounted refrigeration device is a low-power vehicle-mounted refrigerator.

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