Vehicle-mounted refrigerator control method and related device

Abstract

The application discloses a vehicle-mounted refrigerator control method and related device. The control method comprises the following steps: when the vehicle-mounted refrigerator is in a refrigeration mode, based on the difference between the measured temperature and the actual temperature of the internal temperature sensor of the vehicle-mounted refrigerator being greater than a preset temperature difference, the refrigeration system of the vehicle-mounted refrigerator is controlled to start and stop according to a start-stop cycle, so that the actual temperature inside the vehicle-mounted refrigerator is maintained within a preset temperature range.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a method and device for controlling an on-board refrigerator. Background Technology

[0002] The internal temperature sensor of the vehicle refrigerator is responsible for monitoring the internal temperature of the vehicle refrigerator in real time and transmitting the temperature information to the controller. The controller can then adjust the cooling power of the vehicle refrigerator in a timely manner based on the feedback from the internal temperature sensor, thereby maintaining the stability of the internal temperature of the vehicle refrigerator.

[0003] However, when the internal temperature sensor of the car refrigerator malfunctions, causing it to measure a temperature significantly higher than the actual temperature, the car refrigerator will misjudge the internal temperature as too high, leading to over-cooling, ice formation, and a negative impact on the user experience. Summary of the Invention

[0004] In view of the above problems, this application provides a vehicle refrigerator control method and related device to reduce the risk of ice buildup in the vehicle refrigerator due to excessive cooling. The specific solution is as follows:

[0005] The first aspect of this application provides a method for controlling an on-board refrigerator, including:

[0006] When the vehicle refrigerator is in cooling mode, if the difference between the measured temperature by the internal temperature sensor and the actual temperature is greater than a preset temperature difference, the cooling system of the vehicle refrigerator is controlled to start and stop according to the start-stop cycle so that the actual temperature inside the vehicle refrigerator is maintained within the preset temperature range.

[0007] In one possible implementation, the refrigeration system controlling the vehicle refrigerator starts and stops according to a start-stop cycle to maintain the actual temperature inside the vehicle refrigerator within a preset temperature range, including:

[0008] At the start of the current start-stop cycle, the refrigeration system is controlled to start operation at a preset power.

[0009] When the refrigeration system has been running for a preset duration, the refrigeration system is controlled to stop running.

[0010] When the refrigeration system stops operating for a period of time that reaches the first preset stop time, the refrigeration system is controlled to restart at the preset power, thereby entering the starting stage of the next start-stop cycle.

[0011] In one possible implementation, the refrigeration system controlling the vehicle refrigerator starts and stops according to a start-stop cycle to maintain the actual temperature inside the vehicle refrigerator within a preset temperature range, including:

[0012] By controlling the length of the preset running time, the length of the first preset stop time, and the magnitude of the preset power, the actual temperature inside the vehicle refrigerator can be maintained within the preset temperature range during the process of controlling the refrigeration system to start and stop according to the start-stop cycle.

[0013] In one possible implementation, if, during the current start-stop cycle, the refrigeration system prematurely stops operating due to an unplanned event and subsequently resumes operation, then:

[0014] If the duration of the refrigeration system's shutdown exceeds the second preset shutdown duration, the refrigeration system is controlled to directly enter the starting stage of the next start-stop cycle; the second preset shutdown duration is less than the first preset shutdown duration.

[0015] If the duration of the refrigeration system's shutdown does not exceed the second preset shutdown duration, the refrigeration system is controlled to continue operating at the preset power until the lost operating time in the current start-stop cycle due to premature shutdown is made up. After the lost time is made up, the refrigeration system is controlled to stop operating. When the duration of shutdown reaches the first preset shutdown duration, the refrigeration system is controlled to enter the starting stage of the next start-stop cycle.

[0016] In one possible implementation, based on the fact that the difference between the maximum and minimum values ​​of the measured temperature of the internal temperature sensor of the vehicle refrigerator is less than a first preset value during a preset time period of continuous operation of the refrigeration system, it is determined that the difference between the measured temperature of the internal temperature sensor of the vehicle refrigerator and the actual temperature is greater than the preset temperature difference.

[0017] Alternatively, based on the fact that the measured temperature of the internal temperature sensor of the vehicle refrigerator has not reached the preset ideal temperature during a preset period of continuous operation of the refrigeration system, it is determined that the difference between the measured temperature of the internal temperature sensor of the vehicle refrigerator and the actual temperature is greater than the preset temperature difference.

[0018] Alternatively, based on the fact that the measured temperature of the internal temperature sensor of the vehicle refrigerator exceeds a second preset value when the continuous operation time of the refrigeration system reaches a first preset time, it is determined that the difference between the measured temperature of the internal temperature sensor of the vehicle refrigerator and the actual temperature is greater than the preset temperature difference.

[0019] Alternatively, if the measured value of the ambient temperature sensor is lower than a third preset value, and the number of times the refrigeration system performs over-temperature protection shutdown within a preset time period of continuous operation exceeds a preset number, it is determined that the difference between the measured temperature of the internal temperature sensor of the vehicle refrigerator and the actual temperature is greater than the preset temperature difference.

[0020] In one possible implementation, the vehicle refrigerator control method further includes: sending a fault signal to the vehicle's host computer based on the difference between the measured temperature of the vehicle refrigerator's internal temperature sensor and the actual temperature being greater than the preset temperature difference; the host computer then transmits the fault signal to the user's APP and / or the vehicle manufacturer via the cloud.

[0021] A second aspect of this application provides a computer program product including computer-readable instructions that, when executed on a controller, cause the controller to implement the vehicle refrigerator control method of the first aspect or any implementation thereof.

[0022] A third aspect of this application provides a controller, including at least one processor and a memory connected to the processor, wherein:

[0023] The memory is used to store computer programs;

[0024] The processor is used to execute the computer program so that the controller can implement the vehicle refrigerator control method of the first aspect or any implementation thereof.

[0025] A fourth aspect of this application provides a vehicle-mounted refrigerator, comprising: a refrigeration system, an internal temperature sensor of the vehicle-mounted refrigerator, and a controller as described in the third aspect above; the controller is connected to the refrigeration system and the internal temperature sensor of the vehicle-mounted refrigerator.

[0026] The fifth aspect of this application provides a vehicle, including: the vehicle-mounted refrigerator described in the fourth aspect above.

[0027] The sixth aspect of this application provides a computer storage medium carrying one or more computer programs, which, when executed by a controller, enable the controller to implement the vehicle refrigerator control method described in the first aspect or any implementation thereof.

[0028] By means of the above technical solution, the vehicle refrigerator control method provided in this application can monitor in real time whether the measured temperature of the internal temperature sensor of the vehicle refrigerator is significantly higher than the actual temperature when the vehicle refrigerator is in the cooling mode. Once such a significant difference is detected, the vehicle refrigerator's cooling system is controlled to start and stop periodically, thereby effectively shortening the duration of continuous operation of the cooling system and reducing the risk of the vehicle refrigerator freezing due to over-cooling. Attached Figure Description

[0029] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0030] Figure 1 This application provides a schematic diagram of the structure of a vehicle-mounted refrigerator;

[0031] Figure 2 A timing diagram for the control of a vehicle-mounted refrigerator is provided in this application;

[0032] Figure 3 Another vehicle-mounted refrigerator control timing diagram provided in this application;

[0033] Figure 4 Another vehicle-mounted refrigerator control timing diagram provided in this application. Detailed Implementation

[0034] In order to ensure the accuracy of the citations and the fluency of reading, the key technical terms, abbreviations or acronyms used in the text are summarized and explained as follows:

[0035] SUV: Sport Utility Vehicle;

[0036] MPV: Multi-Purpose Vehicle;

[0037] NTC: Negative Temperature Coefficient;

[0038] HU: Head Unit, host computer;

[0039] APP: Application, software.

[0040] A car refrigerator is a small refrigeration device designed specifically for use inside automobiles (including sedans, SUVs, MPVs, etc.). It utilizes the vehicle's power supply (usually 12V or 24V DC) and, through its built-in refrigeration system, provides a refrigerated or frozen environment for items inside while the vehicle is in motion, thus meeting the need for low-temperature preservation of food, beverages, medicines, and other items during travel.

[0041] The internal temperature sensor of a car refrigerator is an important component of the car refrigerator. It is responsible for monitoring the internal temperature of the car refrigerator in real time and transmitting the temperature information to the controller of the car refrigerator. The controller can then adjust the cooling power of the car refrigerator in a timely manner based on the feedback from the internal temperature sensor, thereby maintaining the stability of the internal temperature of the car refrigerator.

[0042] However, when the internal temperature sensor of the car refrigerator malfunctions, it will be unable to accurately measure the true temperature inside the refrigerator. If the controller receives incorrect temperature information, it may make incorrect cooling decisions, impacting the user experience. For example:

[0043] The internal temperature sensor in car refrigerators commonly uses an NTC temperature sensor. An NTC temperature sensor uses an NTC thermistor as the temperature sensing element. The characteristic of an NTC thermistor is that its resistance changes with temperature, exhibiting a negative temperature coefficient. That is, when the temperature rises, the resistance of the NTC thermistor decreases; when the temperature falls, the resistance increases. By accurately measuring the resistance of the NTC thermistor, the internal temperature of the car refrigerator can be accurately determined.

[0044] NTC temperature sensors are typically encapsulated in epoxy resin to protect them from external environmental interference. However, improper epoxy encapsulation can result in internal air bubbles, reducing their waterproof performance. If moisture seeps into the NTC temperature sensor through these bubbles, it can cause a short circuit in the NTC thermistor, leading to an abnormally low resistance value. When the controller receives this abnormally low resistance, it may mistakenly interpret it as an overheating issue and unduly increase the cooling power in an attempt to lower the internal temperature. However, since the actual internal temperature is not that high, this unnecessary increase in cooling leads to overcooling and subsequent icing. Icing not only reduces the refrigeration or freezing efficiency and affects the quality of stored items, but it can also place an extra burden on the refrigerator's mechanical components and refrigeration system, potentially causing damage.

[0045] To address this issue, this application provides a method for controlling a vehicle-mounted refrigerator. This method primarily involves real-time monitoring of the internal temperature sensor of the vehicle-mounted refrigerator during its cooling mode to determine if the measured temperature is significantly higher than the actual temperature. Once such a significant difference is detected, the refrigerator's cooling system is periodically started and stopped to effectively shorten the duration of continuous operation, thereby reducing the risk of ice buildup due to over-cooling.

[0046] The following detailed description, with reference to the accompanying drawings, illustrates a vehicle-mounted refrigerator control method provided in an embodiment of this application. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in this application are equally applicable to similar technical problems.

[0047] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of elements is not necessarily limited to those elements, but may include other elements not explicitly listed or inherent to those processes, methods, products, or apparatuses.

[0048] This application provides a vehicle refrigerator control method, which specifically includes: when the vehicle refrigerator is in cooling mode, if the difference between the measured temperature of the internal temperature sensor and the actual temperature is greater than a preset temperature difference, the vehicle refrigerator's cooling system is controlled to start and stop according to a predetermined start-stop cycle; if the difference between the measured temperature of the internal temperature sensor and the actual temperature is not greater than the preset temperature difference, normal cooling can be performed according to the traditional control method.

[0049] The working principle of this application's embodiments is analyzed as follows:

[0050] When the car refrigerator is in cooling mode, if the difference between the measured temperature of the internal temperature sensor and the actual temperature is greater than the preset temperature difference, it indicates that the measured temperature of the internal temperature sensor is significantly too high and the internal temperature sensor has failed. If no intervention is taken, the car refrigerator controller will misjudge the high temperature inside the refrigerator, which will cause the refrigerator to over-cool and eventually lead to icing.

[0051] In response, the intervention measures adopted in this application embodiment are as follows: when the vehicle refrigerator is in cooling mode, once it is detected that the measured temperature of the internal temperature sensor of the vehicle refrigerator is significantly higher, the cooling system of the vehicle refrigerator is periodically started and stopped, thereby effectively shortening the continuous operation time of the cooling system, ensuring that the actual temperature inside the vehicle refrigerator is maintained within the ideal range, and thus reducing the risk of the vehicle refrigerator freezing due to over-cooling.

[0052] In one possible implementation, the refrigeration system of the vehicle refrigerator is periodically started and stopped to maintain the actual temperature inside the refrigerator within a preset temperature range. This includes controlling the refrigeration power of the vehicle refrigerator to periodically switch between zero power (i.e., when the refrigeration system stops working) and a preset power (i.e., the power at which the refrigeration system is running). For example, at the beginning of the current start-stop cycle, the refrigeration system is controlled to start operating at the preset power; when the duration of operation reaches the preset running time, the refrigeration system is controlled to stop operating; when the duration of shutdown reaches the first preset shutdown time, the refrigeration system is controlled to restart operating at the preset power, thus entering the starting stage of the next start-stop cycle. Of course, the start-up of the refrigeration system can be used as the beginning of each start-stop cycle, or the shutdown of the refrigeration system can be used as the beginning of each start-stop cycle; within a start-stop cycle, the duration of shutdown is set to the first preset shutdown time, the duration of startup is set to the preset running time, and the power of the refrigeration system during operation is set to the preset power.

[0053] The length of the start-stop cycle, the length of the first preset stop time, and the preset power of the refrigeration system during operation—these three parameters collectively affect the temperature control and energy consumption performance of the vehicle refrigerator and need to be flexibly set and adjusted according to actual needs. A detailed analysis follows:

[0054] 1) Start-stop cycle

[0055] The start-stop cycle refers to the time required for the refrigeration system of a vehicle refrigerator to complete one full "start-up-stop" cycle. A shorter start-stop cycle means that the refrigeration system can adjust the internal temperature of the vehicle refrigerator more frequently, has a faster response speed, can accurately detect and quickly correct temperature fluctuations, effectively deal with potential problems such as the failure of the internal temperature sensor of the vehicle refrigerator, ensure that the internal temperature of the refrigerator is maintained within the ideal range, and improve temperature control accuracy and stability.

[0056] However, an excessively short start-stop cycle will lead to frequent start-stops of the refrigeration system. This not only increases the risk of accelerated wear on critical components such as the compressor due to starting current surges, but also significantly increases overall energy consumption due to frequent energy peaks. Conversely, while extending the start-stop cycle can reduce the frequency of start-stops and reduce energy consumption and mechanical wear, it sacrifices the immediacy and accuracy of temperature control, resulting in a larger range of temperature fluctuations inside the refrigerator.

[0057] 2) First preset stop time

[0058] During a start-stop cycle, the duration of the refrigeration system's shutdown directly affects the dynamic balance between heat accumulation and dissipation inside the refrigerator. Appropriately extending the shutdown duration can ensure temperature stability inside the refrigerator while providing the refrigeration system with sufficient intermittent rest time, reducing the continuous operation time of the compressor, thereby reducing power consumption and meeting energy-saving requirements.

[0059] However, if the refrigeration system is stopped for too long, the internal temperature of the refrigerator will rise rapidly. Even if refrigeration resumes, additional energy will be needed to dissipate the accumulated heat, prolonging the time it takes to return to the ideal temperature. This increases temperature fluctuations and weakens temperature control stability. Conversely, if the refrigeration system is stopped for too short a time, it will operate under high load for an extended period, accelerating aging and shortening its lifespan.

[0060] 3) Preset power during refrigeration system operation

[0061] The preset power of a refrigeration system determines its cooling efficiency and intensity. High power gives the refrigeration system strong cooling capacity, which can quickly reduce the internal temperature of the refrigerator, effectively resist the intrusion of external heat, and meet the needs of rapid cooling and stable temperature control.

[0062] However, high-power operation is accompanied by high energy consumption, which will put significant pressure on the vehicle battery in the long run, shortening the driving range of electric vehicles. At the same time, the increased heat generated by high-power operation places higher demands on the cooling system, increasing energy consumption and the complexity of the cooling system. Conversely, if the preset power is too low, the cooling capacity will be limited, making it difficult to maintain a stable low-temperature environment under high heat load, causing the internal temperature of the refrigerator to rise rapidly and failing to meet the low-temperature requirements of stored items.

[0063] In summary, these three parameters are interdependent and mutually influential. In practical applications, a comprehensive consideration and precise adjustment based on factors such as the usage scenario of the vehicle refrigerator, the vehicle's power supply capacity, and the characteristics of the stored items are necessary to achieve the ideal operating state of stable temperature and reasonable energy consumption. The specific values ​​of these three parameters can be obtained as follows: With the internal temperature sensor of the vehicle refrigerator functioning normally, through multiple experiments, determine the specific values ​​of these three parameters required to maintain the measured temperature of the internal temperature sensor within the preset temperature range during the start-stop cycle of the refrigeration system. In a certain application scenario, the refrigeration system of the vehicle refrigerator can be set to run for 7 minutes every 27 minutes.

[0064] In one possible implementation, the vehicle-mounted refrigerator is equipped with a human-machine interface (HMI). Users can input and set specific values ​​for these three parameters through this HMI, which provides real-time feedback on these settings, ensuring users clearly understand and confirm their configurations. This design grants users a high degree of operational freedom and personalization options.

[0065] This human-computer interaction interface includes, for example, a display screen and touch buttons, such as... Figure 1 As shown. Figure 1 This is a schematic diagram of a vehicle-mounted refrigerator, whose components include: a human-machine interface, a main control board (with a controller as its core component), a cabinet, a door (i.e., the refrigerator door), and a compressor (the core component of the refrigeration system); the cabinet also houses an internal temperature sensor for the vehicle-mounted refrigerator. Figure 1 (Identified as NTC1), heating film, heating wire, fan and lighting, etc.

[0066] Furthermore, since the length of the start-stop cycle is equal to the sum of the preset running time and the first preset stopping time, by configuring the length of the start-stop cycle, the length of the first preset stopping time, and the magnitude of the preset power, the actual temperature inside the vehicle refrigerator can be maintained within the preset temperature range. That is, by controlling the length of the preset running time, the length of the first preset stopping time, and the magnitude of the preset power, the actual temperature inside the vehicle refrigerator can be maintained within the preset temperature range during the process of controlling the refrigeration system to start and stop according to the start-stop cycle.

[0067] During the periodic start-stop process of the refrigeration system, it is inevitable that the system will stop operating prematurely due to unplanned events and then resume operation. Examples of unplanned events include: opening and closing the refrigerator door, power outages followed by power restoration, switching to heating mode causing cooling to stop and then re-enter cooling mode. If the refrigeration system stops operating briefly due to an unplanned event and then resumes operation, the internal temperature of the refrigerator will not change significantly due to the short stop time. In this case, directly entering the next start-stop cycle may lead to over-cooling of the vehicle refrigerator in the next cycle. Conversely, if the refrigeration system stops operating for a long time due to an unplanned event and then resumes operation, the internal temperature of the refrigerator will have already risen significantly. In this case, the system should directly enter the next start-stop cycle to lower the temperature. That is to say, if the refrigeration system stops operating prematurely due to an unplanned event and then resumes operation within the current start-stop cycle, the embodiments of this application can take the following countermeasures:

[0068] If the refrigeration system stops operating for a period exceeding the second preset stop time, the refrigeration system will directly enter the start phase of the next start-stop cycle; the second preset stop time is less than the first preset stop time.

[0069] If the duration of the refrigeration system's shutdown does not exceed the second preset shutdown duration, the refrigeration system is controlled to continue operating at a preset power until the lost operating time in the current start-stop cycle due to the premature shutdown is made up. After the lost time is made up, the refrigeration system is controlled to stop operating. When the duration of the shutdown reaches the first preset shutdown duration, the refrigeration system is controlled to enter the starting stage of the next start-stop cycle.

[0070] This application embodiment can control the refrigeration system to start and stop according to a predetermined start-stop cycle by configuring two timers (runtime timer and stop timer). The runtime timer records the runtime of the refrigeration system within each start-stop cycle, and the stop timer records the stop duration within each start-stop cycle. The sum of these two durations constitutes the total duration of a complete start-stop cycle.

[0071] In the absence of unplanned events, the implementation process based on these two timers specifically includes:

[0072] At the start of the current start-stop cycle, control the refrigeration system to start running, and at the same time control the runtime timer to start counting from zero;

[0073] When the runtime timer's timing value T ON Reaching the preset runtime T SET_ON When the timer is activated, the refrigeration system stops operating, and the stop duration timer is triggered to start counting from zero.

[0074] When the stop duration timer's timing value T OFF Reaching the first preset stop time T SET_OFF_1 When the time comes, the refrigeration system is restarted, and the runtime timer is triggered to restart from zero, thus entering the starting stage of the next start-stop cycle.

[0075] The vehicle refrigerator's cooling system still operates for 7 minutes every 27 minutes (i.e., T). SET_ON =7min, T SET_OFF_1 For example, if (20min), then... Figure 2 As shown (horizontal axis represents time t, vertical axis represents the start-stop state of the refrigeration system): At the beginning of the first start-stop cycle, the refrigeration system starts running (ON state) and T... ON Start accumulating from zero; when T... ON When the cumulative time reaches 7 minutes, the cooling system stops running (OFF state) and T... OFF Start accumulating from zero, when T... OFF When the accumulation reaches 20 minutes, the cooling system restarts and runs simultaneously. ONThe accumulation starts again from zero, thus entering the initial stage of the second start-stop cycle, and so on.

[0076] When no unplanned events occur, the implementation process based on these two timers specifically includes:

[0077] If, during the current start-stop cycle, the refrigeration system stops operating prematurely due to an unplanned event and subsequently resumes operation, it is determined whether the duration of the refrigeration system's shutdown exceeds the second preset shutdown duration T. SET_OFF_2 (T SET_OFF_2 <T SET_OFF_1 If so, set the runtime timer value T. ON The timer is reset to zero, and the refrigeration system is controlled to enter the starting stage of the next start-stop cycle; otherwise, the runtime timer is controlled to continue counting from the time value corresponding to the moment the refrigeration system stopped running prematurely, and the start and stop of the refrigeration system continues within the current start-stop cycle. Where T... SET_OFF_2 The specific values ​​are set based on factors such as the specific model, capacity, ideal temperature, and desired cooling efficiency of the vehicle refrigerator, and are used to distinguish between minor disturbances and events that significantly affect the internal temperature of the refrigerator.

[0078] The vehicle refrigerator's cooling system runs for 7 minutes every 27 minutes (i.e., T). SET_ON =7min, T SET_OFF_1 =20min) and T SET_OFF_2 For example, if the time is 5 minutes, then... Figure 3 As shown: At the start of the second start-stop cycle, the refrigeration system starts running (ON state) and T... ON Start accumulating from zero; when T... ON If the refrigerator experiences an unexpected power outage and is restored to power after 10 minutes when the accumulated time reaches 6 minutes, the refrigeration system will stop operating (OFF state) at the moment of the power outage. Simultaneously, T... OFF Accumulate from zero; the refrigeration system restarts the moment power is restored to the refrigerator; T OFF Accumulate to 10 minutes and set T simultaneously ON Start accumulating again from zero (because 10min > T) SET_OFF_2 Thus, the refrigeration system enters the initial stage of its third start-stop cycle.

[0079] The vehicle refrigerator's cooling system still operates for 7 minutes every 27 minutes (i.e., T). SET_ON =7min, T SET_OFF_1 =20min) and T SET_OFF_2 For example, if the time is 5 minutes, then... Figure 4 As shown: At the start of the second start-stop cycle, the refrigeration system starts running (ON state) and T... ON Start accumulating from zero; when T...ON If the refrigerator experiences an unexpected power outage and is then restored to power after 3 minutes, the refrigeration system will stop operating (OFF state) at the moment of the power outage. Simultaneously, T... OFF Accumulate from zero; the refrigeration system restarts the moment power is restored to the refrigerator; T OFF Accumulate to 3 minutes and set T simultaneously ON Continue accumulating from 6 minutes onwards (because 3 minutes ≤ T) SET_OFF_2 When T ON When the accumulation reaches 7 minutes, the cooling system stops running and T... OFF Start accumulating from zero, when T... OFF When the accumulation reaches 20 minutes, the cooling system restarts and runs simultaneously. ON The accumulation starts again from zero, thus entering the initial stage of the third start-stop cycle.

[0080] Based on any of the embodiments provided above, any of the following methods can be used to identify whether the measured temperature of the internal temperature sensor of the vehicle refrigerator is significantly higher than normal:

[0081] Method 1: If the difference between the maximum and minimum measured temperatures of the vehicle refrigerator's internal temperature sensor is less than a first preset value during a preset period of continuous operation of the refrigeration system, then the measured temperature of the vehicle refrigerator's internal temperature sensor is determined to be significantly too high.

[0082] For example, if the difference between the measured temperature when the car refrigerator is turned on and the measured temperature after one hour of continuous cooling is less than 5°C, it is determined that the measured temperature of the car refrigerator's internal temperature sensor is significantly too high, because this phenomenon is obviously not in line with the normal cooling characteristics of a refrigerator.

[0083] Method 2: If the measured temperature of the internal temperature sensor of the vehicle refrigerator does not reach the preset ideal temperature within a preset time period during which the refrigeration system is running continuously, it is determined that the measured temperature of the internal temperature sensor of the vehicle refrigerator is significantly too high.

[0084] For example, if the measured temperature does not reach the ideal temperature within one hour of continuous cooling in the car refrigerator, it is determined that the measured temperature of the internal temperature sensor of the car refrigerator is significantly too high, because this phenomenon is obviously not in line with the normal cooling characteristics of a refrigerator.

[0085] Method 3: If the measured temperature of the internal temperature sensor of the vehicle refrigerator exceeds the second preset value when the refrigeration system has been running continuously for a first preset time, it is determined that the measured temperature of the internal temperature sensor of the vehicle refrigerator is significantly too high.

[0086] For example, if the measured temperature exceeds 25°C when the car refrigerator is continuously cooling for 1 hour, it is determined that the measured temperature of the internal temperature sensor of the car refrigerator is significantly too high, because this phenomenon is obviously not in line with the normal cooling characteristics of a refrigerator.

[0087] Method 4: When the measured value of the ambient temperature sensor is lower than the third preset value, if the number of times the refrigeration system shuts down due to over-temperature protection exceeds the preset number within a preset time period during which the refrigeration system continues to run, it is determined that the measured temperature of the internal temperature sensor of the vehicle refrigerator is significantly too high.

[0088] For example, if the ambient temperature sensor reading exceeds 67°C, and the refrigeration system shuts down due to over-temperature protection more than twice within two hours of continuous refrigeration by the vehicle refrigerator, then the internal temperature sensor reading of the vehicle refrigerator is determined to be significantly too high, because this phenomenon is obviously not in line with the normal refrigeration characteristics of a refrigerator.

[0089] Over-temperature protection shutdown is a common safety mechanism designed to prevent equipment damage or safety accidents caused by excessively high temperatures. Its principle is as follows: a temperature sensor is installed at the compressor... Figure 1 (Identified as NTC2 in the text) to monitor the compressor temperature in real time; when the temperature sensor detects that the compressor temperature is higher than the set temperature threshold, it will trigger the compressor to stop to prevent further heating.

[0090] Based on any of the embodiments provided above, when the internal temperature sensor of the vehicle refrigerator is detected to be malfunctioning, a fault signal is sent to the vehicle's HU (Hub). The HU can then transmit the fault signal to the user's APP via the cloud to remind the user to schedule an update of the internal temperature sensor of the vehicle refrigerator in a timely manner; and / or, the HU can then transmit the fault signal to the vehicle manufacturer via the cloud to remind the vehicle manufacturer to prepare the internal temperature sensor of the vehicle refrigerator in advance.

[0091] The fault signal is, for example, Vfridge_InTemp = 127 (127 corresponds to a temperature of 86℃. In practical applications, this value is a sign that is significantly outside the normal range and is used to indicate a fault. Of course, it can also be replaced with other suitable values). This fault code is different from the Vfridge_InTemp value that is normally fed back to the HU.

[0092] This application also provides a computer program product, including computer-readable instructions, which, when executed on a controller, cause the controller to implement any of the vehicle refrigerator control methods provided in this application.

[0093] This application embodiment also provides a controller, including at least one processor and a memory connected to the processor, wherein:

[0094] The memory is used to store computer programs;

[0095] The processor is used to execute the computer program so that the controller can implement any of the vehicle refrigerator control methods provided in the embodiments of this application.

[0096] This application also provides a vehicle refrigerator, including: a refrigeration system, an internal temperature sensor of the vehicle refrigerator, and any of the controllers provided in this application; the controller is connected to the refrigeration system and the internal temperature sensor of the vehicle refrigerator.

[0097] This application also provides a vehicle, including any of the vehicle-mounted refrigerators provided in this application.

[0098] This application also provides a computer-readable storage medium carrying one or more computer programs. When the one or more computer programs are executed by a controller, the controller can implement any of the vehicle refrigerator control methods provided in this application.

[0099] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the embodiments of this application. Therefore, the embodiments of this application are not to be limited to the embodiments shown herein, but are to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling a vehicle-mounted refrigerator, characterized in that, include: When the vehicle refrigerator is in cooling mode, if the difference between the measured temperature by the internal temperature sensor and the actual temperature is greater than a preset temperature difference, the cooling system of the vehicle refrigerator is controlled to start and stop according to the start-stop cycle so that the actual temperature inside the vehicle refrigerator is maintained within the preset temperature range.

2. The vehicle-mounted refrigerator control method according to claim 1, characterized in that, The control of the vehicle refrigerator's refrigeration system to start and stop according to a start-stop cycle, so as to maintain the actual temperature inside the vehicle refrigerator within a preset temperature range, includes: At the start of the current start-stop cycle, the refrigeration system is controlled to start operation at a preset power. When the refrigeration system has been running for a preset duration, the refrigeration system is controlled to stop running. When the refrigeration system stops operating for a period of time that reaches the first preset stop time, the refrigeration system is controlled to restart at the preset power, thereby entering the starting stage of the next start-stop cycle.

3. The vehicle-mounted refrigerator control method according to claim 1 or 2, characterized in that, The control of the vehicle refrigerator's refrigeration system to start and stop according to a start-stop cycle, so as to maintain the actual temperature inside the vehicle refrigerator within a preset temperature range, includes: By controlling the length of the preset running time, the length of the first preset stop time, and the magnitude of the preset power, the actual temperature inside the vehicle refrigerator can be maintained within the preset temperature range during the process of controlling the refrigeration system to start and stop according to the start-stop cycle.

4. The vehicle-mounted refrigerator control method according to claim 1 or 2, characterized in that, If, during the current start-stop cycle, the refrigeration system stops operating prematurely due to an unplanned event and subsequently resumes operation, then: If the duration of the refrigeration system's shutdown exceeds the second preset shutdown duration, the refrigeration system is controlled to directly enter the starting stage of the next start-stop cycle; the second preset shutdown duration is less than the first preset shutdown duration. If the duration of the refrigeration system's shutdown does not exceed the second preset shutdown duration, the refrigeration system is controlled to continue operating at the preset power until the lost operating time in the current start-stop cycle due to premature shutdown is made up. After the lost time is made up, the refrigeration system is controlled to stop operating. When the duration of shutdown reaches the first preset shutdown duration, the refrigeration system is controlled to enter the starting stage of the next start-stop cycle.

5. The vehicle-mounted refrigerator control method according to any one of claims 1 to 4, characterized in that: Based on the fact that the difference between the maximum and minimum values ​​of the measured temperature of the internal temperature sensor of the vehicle refrigerator is less than a first preset value during a preset time period of continuous operation of the refrigeration system, it is determined that the difference between the measured temperature of the internal temperature sensor of the vehicle refrigerator and the actual temperature is greater than the preset temperature difference. Alternatively, based on the fact that the measured temperature of the internal temperature sensor of the vehicle refrigerator has not reached the preset ideal temperature during a preset period of continuous operation of the refrigeration system, it is determined that the difference between the measured temperature of the internal temperature sensor of the vehicle refrigerator and the actual temperature is greater than the preset temperature difference. Alternatively, based on the fact that the measured temperature of the internal temperature sensor of the vehicle refrigerator exceeds a second preset value when the continuous operation time of the refrigeration system reaches a first preset time, it is determined that the difference between the measured temperature of the internal temperature sensor of the vehicle refrigerator and the actual temperature is greater than the preset temperature difference. Alternatively, if the measured value of the ambient temperature sensor is lower than a third preset value, and the number of times the refrigeration system performs over-temperature protection shutdown within a preset time period of continuous operation exceeds a preset number, it is determined that the difference between the measured temperature of the internal temperature sensor of the vehicle refrigerator and the actual temperature is greater than the preset temperature difference.

6. The vehicle-mounted refrigerator control method according to any one of claims 1 to 4, characterized in that, Also includes: If the difference between the measured temperature and the actual temperature of the vehicle refrigerator's internal temperature sensor is greater than the preset temperature difference, a fault signal is sent to the vehicle's main unit. The main unit then transmits the fault signal to the user's APP and / or the vehicle manufacturer via the cloud.

7. A computer program product, characterized in that, Includes computer-readable instructions that, when executed on a controller, cause the controller to implement the vehicle refrigerator control method as described in any one of claims 1 to 6.

8. A controller, characterized in that, It includes at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is used to execute the computer program so that the controller can implement the vehicle refrigerator control method as described in any one of claims 1 to 6.

9. A vehicle-mounted refrigerator, characterized in that, include: The refrigeration system, the internal temperature sensor of the vehicle refrigerator, and the controller as described in claim 8; The controller is connected to the internal temperature sensors of the refrigeration system and the vehicle refrigerator.

10. A vehicle, characterized in that, include: The vehicle refrigerator as described in claim 9.

11. A computer storage medium, characterized in that, The storage medium carries one or more computer programs that, when executed by the controller, enable the controller to implement the vehicle refrigerator control method as described in any one of claims 1 to 6.

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