Vehicle air conditioning system refrigerant detection method, device, medium and electronic equipment

Abstract

The present disclosure relates to a vehicle-mounted air conditioning system refrigerant detection method, device, medium and electronic equipment. The vehicle-mounted air conditioning system refrigerant detection method comprises: obtaining refrigerant detection data of a target vehicle, the refrigerant detection data being refrigerant loss degree related data; determining a refrigerant state based on the refrigerant detection data, the refrigerant state comprising a refrigerant anomaly or a refrigerant normal, the refrigerant state being used to represent a refrigerant loss degree, the refrigerant loss degree when the refrigerant is abnormal being greater than a loss degree set threshold, and the loss degree set threshold being less than a loss degree reference threshold corresponding to a normal refrigeration effect. The technical scheme of the present disclosure can determine the refrigerant state of the vehicle-mounted air conditioning system, so that the user can timely add refrigerant and ensure the refrigeration effect of the vehicle-mounted air conditioning system.

Description

Technical Field

[0001] This disclosure relates to the field of automotive control technology, and in particular to a method, apparatus, medium, and electronic equipment for detecting refrigerant in an on-board air conditioning system. Background Technology

[0002] A vehicle air conditioning system consists of a compressor, condenser, throttling element, evaporator, fan, and necessary control components. It regulates the temperature and humidity inside the vehicle to provide a comfortable environment for passengers. When the compressor operates, it draws in low-temperature, low-pressure gaseous refrigerant from the evaporator. After compression, the refrigerant's temperature and pressure increase, and it is sent to the condenser. Inside the condenser, the high-temperature, high-pressure gaseous refrigerant transfers heat to the outside air passing through the condenser, liquefying into a liquid. As the liquid refrigerant flows through the throttling device, its temperature and pressure decrease, and it enters the evaporator. Inside the evaporator, the low-temperature, low-pressure liquid refrigerant absorbs heat from the air passing through the evaporator and evaporates into a gas. This gas is then drawn back into the compressor for the next cycle. In this way, through the circulation of the refrigerant within the system, heat is continuously absorbed from the air inside the vehicle and released to the outside air, gradually lowering the temperature of the air inside the vehicle.

[0003] Currently, after prolonged use, vehicle air conditioning systems can leak due to aging of their seals and external forces, leading to refrigerant abnormalities. When the refrigerant is abnormal, the cooling effect is reduced, severely impacting the user's experience in hot weather. Refrigerant testing of a vehicle's air conditioning system requires a visit to a repair shop. This means that users are likely to only bring the system in for inspection and repair when they notice reduced efficiency or that the cooling effect is insufficient. For example, if the air conditioning is not used during autumn and winter, the refrigerant status may not be apparent, potentially leading to refrigerant abnormalities when the system is used again. Summary of the Invention

[0004] To address the aforementioned technical problems, this disclosure provides a method, apparatus, medium, and electronic device for detecting refrigerant in a vehicle air conditioning system.

[0005] This disclosure provides a method for detecting refrigerant in a vehicle air conditioning system, including:

[0006] Obtain refrigerant detection data of the target vehicle, wherein the refrigerant detection data is related to the degree of refrigerant deficiency;

[0007] Based on the refrigerant detection data, the refrigerant status is determined. The refrigerant status includes refrigerant abnormality or refrigerant normality. The refrigerant status is used to characterize the degree of refrigerant deficiency. When the refrigerant is abnormal, the degree of refrigerant deficiency is greater than a set threshold for the degree of deficiency, and the set threshold for the degree of deficiency is less than the reference threshold for the degree of deficiency corresponding to normal cooling effect.

[0008] In some embodiments, prior to acquiring the refrigerant detection data of the target vehicle, the method further includes:

[0009] Determine the testing cycle for the refrigerant;

[0010] The testing date is determined based on the aforementioned testing cycle;

[0011] The refrigerant test data is acquired during a preset time period on the test date.

[0012] In some embodiments, determining the detection cycle for the refrigerant includes:

[0013] Based on the average temperature of the area where the target vehicle is located within a preset number of days, a first detection cycle is determined, and this first detection cycle is defined as the detection cycle; or...

[0014] Based on the average temperature of the area where the target vehicle is located within a preset number of days, a first detection cycle is determined. Based on the life cycle of the target vehicle, a detection cycle correction value is determined. The sum of the first detection cycle and the detection cycle correction value is determined as the detection cycle.

[0015] In some embodiments, the refrigerant detection data includes the vehicle's external temperature, the air conditioning system's high-pressure pressure, the temperature at the left-side air outlet, and the temperature at the right-side air outlet; acquiring the refrigerant detection data of the target vehicle includes:

[0016] The target detection system of the target vehicle is controlled to operate under preset conditions. The target detection system includes an air conditioning control system, a compressor, and a thermal management control system.

[0017] After the air conditioning system is operating stably, the external temperature of the vehicle, the high pressure of the air conditioning system, the temperature of the left air outlet, and the temperature of the right air outlet are obtained.

[0018] In some embodiments, the preset operating conditions include:

[0019] The air conditioning system operates in the following modes: face blowing mode, external circulation mode, maximum cooling, maximum fan speed, and air conditioning off.

[0020] The compressor operates at a preset speed; and,

[0021] Battery thermal management is off, the passenger compartment is in cooling mode, and the drive system uses drive cooling function.

[0022] In some embodiments, prior to acquiring the refrigerant detection data of the target vehicle, the method further includes:

[0023] The vehicle status is determined to meet at least one of the following conditions: the vehicle is stationary, the vehicle is not in use, the vehicle is locked and no one is inside, the battery state of charge is greater than a set power threshold, the vehicle is not charging, the vehicle light intensity is less than a set light intensity threshold, the outside temperature is greater than a first set temperature threshold, and the temperature difference between the inside and outside of the vehicle is less than or equal to a second set temperature threshold.

[0024] In some embodiments, the refrigerant detection data includes the vehicle's external temperature, the air conditioning system's high-pressure pressure, the temperature at the left-side air outlet, and the temperature at the right-side air outlet; determining the refrigerant state based on the refrigerant detection data includes:

[0025] Based on the external temperature of the vehicle, determine the corresponding range of abnormal average air outlet temperature and the range of abnormal high pressure of the air conditioning system.

[0026] The average air outlet temperature and the range of abnormal average air outlet temperatures were compared, as were the high pressure of the air conditioning system and the range of abnormal high pressure of the air conditioning system. The average air outlet temperature is the average of the air outlet temperatures on the left and right sides.

[0027] Based on the comparison results, the refrigerant state is determined.

[0028] This disclosure provides an embodiment of a device for detecting refrigerant in a vehicle air conditioning system, comprising:

[0029] The data acquisition module is used to acquire refrigerant detection data of the target vehicle, wherein the refrigerant detection data is related to the degree of refrigerant deficiency;

[0030] The refrigerant status judgment module is used to determine the refrigerant status based on the refrigerant detection data. The refrigerant status includes refrigerant abnormality or refrigerant normality. The refrigerant status is used to characterize the degree of refrigerant deficiency. When the refrigerant is abnormal, the degree of refrigerant deficiency is greater than a set threshold for the degree of deficiency, and the set threshold for the degree of deficiency is less than the reference threshold for the degree of deficiency corresponding to normal cooling effect.

[0031] This disclosure provides a computer-readable storage medium that stores a program or instructions that cause a computer to perform the steps of any of the methods described above.

[0032] This disclosure provides an electronic device, including a processor and a memory.

[0033] The processor executes the steps of any of the above methods by calling programs or instructions stored in the memory.

[0034] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0035] This disclosure provides a method for detecting refrigerant in a vehicle air conditioning system. By acquiring refrigerant detection data from a target vehicle, the refrigerant status is determined based on this data. The refrigerant status includes either refrigerant abnormality or refrigerant normality. The refrigerant status characterizes the degree of refrigerant deficiency. When the refrigerant is abnormal, the degree of deficiency exceeds a set threshold, and this set threshold is lower than a reference threshold for normal cooling performance. Therefore, this disclosure can determine the refrigerant status of the vehicle air conditioning system using refrigerant detection data. When the refrigerant deficiency exceeds the set threshold, the refrigerant status is abnormal. Since the set threshold is lower than the reference threshold for normal cooling performance, the air conditioning system's cooling effect remains normal even when the refrigerant abnormality first appears. This allows the user to add refrigerant promptly while the air conditioning comfort still meets basic user needs, ensuring the vehicle air conditioning system's cooling performance. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0037] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 A flowchart illustrating a method for detecting refrigerant in a vehicle air conditioning system, provided as an embodiment of this disclosure;

[0039] Figure 2 A structural block diagram of a refrigerant detection device for an in-vehicle air conditioning system provided in an embodiment of this disclosure;

[0040] Figure 3 This is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of this disclosure. Detailed Implementation

[0041] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0042] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0043] Figure 1 This flowchart illustrates a method for detecting refrigerant in a vehicle air conditioning system, provided as an embodiment of this disclosure. This method is applicable to detecting refrigerant deficiency in a vehicle air conditioning system. It can be applied to a server, a vehicle, or a system including both a vehicle and a server, and is implemented through interaction between the vehicle and the server. The server can be a standalone server or a server cluster consisting of multiple servers; optionally, the server is a cloud server. This method can be executed by a refrigerant detection device for a vehicle air conditioning system, which can be implemented using software and / or hardware and can be applied to electronic devices. Figure 1 As shown, the method includes the following steps:

[0044] S101. Obtain the refrigerant detection data of the target vehicle. The refrigerant detection data is related to the degree of refrigerant deficiency.

[0045] The refrigerant detection data disclosed in this embodiment refers to refrigerant deficiency data collected by the target vehicle while the air conditioning system is running. Specifically, the target vehicle can automatically run its air conditioning system to collect refrigerant detection data after the user starts the vehicle; alternatively, the target vehicle can be automatically woken up (e.g., by a timer) by the server or the target vehicle itself after it is turned off, and then collect refrigerant detection data by running its air conditioning system after power-on. Considering that the operating conditions of the air conditioning system during refrigerant detection may not meet the needs of passengers, it is preferable to automatically wake up the target vehicle after it is turned off to obtain refrigerant detection data, thereby avoiding discomfort to passengers caused by the operation of the air conditioning system. In some embodiments, the refrigerant detection data may specifically include the vehicle's external temperature, the high-pressure pressure of the air conditioning system, the temperature of the left-side air outlet, and the temperature of the right-side air outlet. Accordingly, in some embodiments, acquiring refrigerant detection data of the target vehicle includes: controlling the target vehicle's target detection system to operate under preset conditions, the target detection system including an air conditioning control system, a compressor, and a thermal management control system; after the air conditioning system has stabilized, acquiring the vehicle's external temperature, air conditioning system high-pressure pressure, left-side air outlet temperature, and right-side air outlet temperature. The preset conditions may include the air conditioning system operating in surface-blowing mode, external circulation mode, maximum cooling, maximum fan speed, and with the rear air conditioning off; the compressor operating at a preset speed, which may be 3000 rpm; and battery thermal management off, passenger compartment in cooling mode, and drive system using drive cooling function. Since the air conditioning system generally reaches a stable state after 180 seconds of operation, to ensure stable operation, the air conditioning system can operate under the aforementioned preset conditions for 200 seconds, and then retain the vehicle's external temperature, air conditioning system high-pressure pressure, left-side air outlet temperature, and right-side air outlet temperature for the last 10 seconds to ensure the accuracy of the detection results and avoid detection errors.

[0046] Specifically, to ensure the air conditioning system operates under the aforementioned preset conditions, the target vehicle sends the following signals to the air conditioning control system: a first front air conditioning intake mode motor position request signal, a second front air conditioning intake mode motor position request signal, a front air conditioning defrost mode motor position request signal, a front air conditioning face blowing mode motor position request signal, a front air conditioning foot blowing mode motor position request signal, a front air conditioning left temperature motor position request signal, a front air conditioning right temperature motor position request signal, a front air conditioning blower relay drive enable signal, a blower target voltage request signal, and a rear air conditioning blower relay drive enable signal; it also sends a speed request signal to the compressor; and it sends battery thermal management mode, passenger compartment thermal management mode, and drive system cooling mode request signals to the thermal management control system. This ensures the air conditioning system operates in face blowing mode, external circulation mode, maximum cooling, maximum fan speed, and with the rear air conditioning off. The compressor operates stably at a preset speed (e.g., 3000 rpm), and battery thermal management is off, the passenger compartment is in cooling mode, and the drive system is in drive cooling mode.

[0047] It should be noted that the above-mentioned preset operating conditions are only a specific example of this disclosure. The preset operating conditions of this disclosure are not limited to the above-mentioned operating conditions. In other embodiments, the air conditioning system can also work in the internal circulation mode, and the operating conditions such as cooling temperature and fan speed can also be adjusted, as long as the refrigerant detection data obtained later is compared with the abnormal value range under the corresponding operating conditions.

[0048] In this embodiment, the testing cycle for the refrigerant can be determined first, the testing date can be determined based on the testing cycle, and then the refrigerant testing data can be acquired during a preset time period on the testing date. This achieves periodic testing of the refrigerant.

[0049] In some embodiments, after activating the refrigerant detection function, the detection cycle for the refrigerant detection of the target vehicle is determined, the detection date is determined based on the detection cycle, and refrigerant detection data is acquired during a preset time period on the detection date. In one specific embodiment, when the user triggers the detection activation signal, such as when the user presses the refrigerant charging and maintenance reminder function switch, the refrigerant detection function is activated. At this time, the target vehicle determines the detection cycle for the refrigerant, and the sum of the activation date of the refrigerant detection function and the detection cycle is determined as the refrigerant detection date. Subsequently, the target vehicle runs the air conditioning system during the preset time period on the detection date by recording the time in real time, and collects refrigerant detection data, thereby obtaining the refrigerant detection data by the target vehicle. However, considering that the target vehicle actively performs refrigerant detection on the detection date, it needs to record the time at all times, which may easily lead to the target vehicle running out of power. Moreover, it needs to store a large amount of data such as refrigerant detection data, occupying a large amount of memory in the target vehicle's electronic control unit. Therefore, in a preferred embodiment, the server determines the detection cycle for the refrigerant detection, determines the detection date based on the detection cycle, and acquires the refrigerant detection data during the preset time period on the detection date. Specifically, when a user triggers the detection activation signal, such as pressing the refrigerant charging and maintenance reminder switch, the refrigerant detection function is activated. At this time, the target vehicle sends a detection activation signal to the server. Upon receiving this signal, the server determines the refrigerant detection cycle and sets the detection date as the sum of the activation date and the detection cycle. Then, the server sends a refrigerant detection request to the target vehicle within a preset time period on the detection date. This request wakes up the target vehicle, triggering the operation of its air conditioning system and the collection of refrigerant detection data. The target vehicle then sends the collected data to the server, which retrieves the data. This avoids the target vehicle running out of power due to the time of the detection date setting and also reduces the memory usage of the vehicle's electronic control unit. In this embodiment, the user can activate or deactivate the refrigerant detection function in the vehicle settings main interface on the central control screen. Optionally, the preset time period is preferably selected from 01:00 to 05:00 to ensure that refrigerant detection is performed without affecting the user's riding experience. It is understandable that when the refrigerant detection is triggered by the server, the target vehicle may include one or more vehicles. For example, when the target vehicle includes multiple vehicles, the server may send refrigerant detection requests to multiple vehicles one by one or in parallel according to the vehicle identifier, so that the target vehicles respond to the refrigerant detection requests to collect refrigerant detection data and feed the refrigerant detection data back to the server.

[0050] In some embodiments, determining the detection cycle for the refrigerant includes: determining a first detection cycle based on the average temperature of the region where the target vehicle is located within a preset number of days, and defining the first detection cycle as the detection cycle; or, determining the first detection cycle based on the average temperature of the region where the target vehicle is located within a preset number of days, determining a detection cycle correction value based on the life cycle of the target vehicle, and defining the sum of the first detection cycle and the detection cycle correction value as the detection cycle.

[0051] The average temperature within the preset number of days is mainly used to reflect the season in the region where the target vehicle is located. It can include the average temperature within the most recent preset number of days and / or the average temperature within the next preset number of days. The preset number of days can be 5 days, etc.

[0052] In a specific example, the testing cycle can be determined based on the ambient temperature. For instance, when the ambient temperature is low, there is no need to turn on the air conditioner for cooling, so refrigerant testing is not performed. However, as the ambient temperature gradually rises, users use the air conditioner more frequently, and the air conditioner temperature is set lower and lower. Consequently, the amount of refrigerant used also increases, making refrigerant depletion more likely. Therefore, as the ambient temperature gradually rises, the testing cycle should be set shorter and shorter. Based on this, this embodiment of the disclosure determines the testing cycle based on the average temperature of the target vehicle's location over a preset number of days in the future. The preset number of days in the future can be one week, and the average temperature over the preset number of days in the future can be obtained from weather forecast data. Specifically, as shown in Table 1, the correspondence between the average temperature and the first testing cycle can be preset to avoid situations where users do not use the vehicle's air conditioner in cold weather, but refrigerant testing continues, making refrigerant testing more reasonable and reducing testing costs.

[0053] Table 1. Correspondence between average ambient temperature and the first detection cycle

[0054] Average temperature (°C) ≤5 ＞5，≤20 ＞20，≤27 ＞27 First testing cycle (days) No detection 15 10 5

[0055] In another specific example, considering that refrigerant leaks become increasingly severe as the vehicle's lifespan (i.e., the number of years the vehicle has been used), the aforementioned inspection cycle is further modified based on the vehicle's lifespan. The sum of the first inspection cycle and the modified inspection cycle value determined based on the vehicle's lifespan is used as the inspection cycle. Specifically, as the vehicle's lifespan increases, the modified inspection cycle value decreases; that is, the longer the vehicle's lifespan, the more frequently refrigerant inspections should be performed to ensure the air conditioning's cooling effect. As shown in Table 2, the correspondence between the vehicle's lifespan and the modified inspection cycle value can be pre-set. When the vehicle's lifespan affects the refrigerant, modifying the inspection cycle based on the vehicle's lifespan allows users with older vehicles to be aware of the refrigerant status in a timely manner, avoiding situations where severe refrigerant leaks lead to poor cooling performance.

[0056] Table 2. Correspondence between vehicle life cycle and inspection cycle correction values

[0057] Vehicle lifecycle (years) ≤1 ＞1，≤3 ＞3，≤5 ＞5 Detection cycle correction value (days) +10 +5 +2 0

[0058] Based on the above embodiments, for example, the average temperature within the preset number of days is 25°C. According to the correspondence between the average ambient temperature and the first detection cycle in Table 1, the first detection cycle can be determined to be 10 days. The vehicle life cycle of the target vehicle is 2 years. According to the correspondence between the vehicle life cycle and the detection cycle correction value in Table 2, the detection cycle correction value can be determined to be 5 days. If the start date of the refrigerant detection is July 1, then the detection date of the refrigerant detection is July 26. A refrigerant detection request is sent to the target vehicle during the preset time period on the detection date.

[0059] S102. Based on refrigerant detection data, determine the refrigerant status, which includes refrigerant abnormality or refrigerant normality. The refrigerant status is used to characterize the degree of refrigerant deficiency. When the refrigerant is abnormal, the degree of refrigerant deficiency is greater than the set threshold for the degree of deficiency, and the set threshold for the degree of deficiency is less than the reference threshold for the degree of deficiency corresponding to normal cooling effect.

[0060] The refrigerant status includes "refrigerant normal" or "refrigerant abnormal," indicating the degree of refrigerant deficiency. For example, if the refrigerant deficiency exceeds a set threshold, it is considered abnormal; if the deficiency is less than or equal to the threshold, it is considered normal. Specifically, when a refrigerant abnormality first occurs, the deficiency is still below the reference threshold for normal cooling performance; in this case, the air conditioning system operates normally. Therefore, a refrigerant abnormality signal can be issued in advance, allowing users to add refrigerant promptly and ensuring the cooling effect of the vehicle's air conditioning system.

[0061] In some embodiments, the refrigerant detection data includes the vehicle's external temperature, the air conditioning system's high-pressure pressure, the temperature of the left-side air outlet, and the temperature of the right-side air outlet. Based on the refrigerant detection data, determining the refrigerant state includes: determining the corresponding average air outlet temperature anomaly range and the air conditioning system high-pressure anomaly range based on the vehicle's external temperature; comparing the average air outlet temperature with the average air outlet temperature anomaly range, and comparing the air conditioning system high-pressure with the air conditioning system high-pressure anomaly range, wherein the average air outlet temperature is the average of the left-side air outlet temperature and the right-side air outlet temperature; and determining the refrigerant state based on the comparison results.

[0062] Specifically, if the average outlet temperature is within the abnormal range and the high pressure of the air conditioning system is within the abnormal range, then the refrigerant is abnormal; if the average outlet temperature is not within the abnormal range and / or the high pressure of the air conditioning system is not within the abnormal range, then the refrigerant is normal.

[0063] Tests show that, under good cooling performance, the average air outlet temperature and the high-pressure pressure of the air conditioning system have different normal ranges for different vehicle external temperature ranges. Based on this, this embodiment of the disclosure determines the corresponding abnormal value ranges for each vehicle external temperature range, according to the normal ranges of the average air outlet temperature and the high-pressure pressure of the air conditioning system. Specifically, the abnormal value ranges for the average air outlet temperature and the high-pressure pressure of the air conditioning system are shown in Table 3. Specifically, the vehicle external temperature range is first determined based on the vehicle's external temperature. Then, the abnormal value ranges for the average air outlet temperature and the high-pressure pressure of the air conditioning system within that range are queried. The obtained average air outlet temperature and high-pressure pressure are compared with their corresponding abnormal value ranges. If both the average air outlet temperature and the high-pressure pressure are within their respective abnormal value ranges, the refrigerant is determined to be abnormal; if at least one of the average air outlet temperature and the high-pressure pressure is not within its corresponding abnormal value range, the refrigerant is determined to be normal. In addition, when the server determines the refrigerant status, the refrigerant detection data used by the server can be the refrigerant detection data received in the last 5 seconds. This can reduce the amount of calculation while ensuring accurate determination of the refrigerant status of the target vehicle.

[0064] Table 3. Relationship between refrigerant anomaly judgment conditions

[0065]

[0066] In some embodiments, after determining the refrigerant status based on refrigerant detection data, the method further includes: when a refrigerant abnormality is detected, the target vehicle issues a refrigerant refill and maintenance reminder signal; or, the server sends a refrigerant abnormality signal to the target vehicle, causing the target vehicle to issue a refrigerant refill and maintenance reminder signal. This reminds the user to perform inspection and maintenance. Furthermore, after detecting whether the refrigerant is normal or abnormal, the refrigerant inspection is determined to be complete, and the date of inspection completion is updated to the inspection start date, thereby calculating the next inspection date based on the inspection cycle.

[0067] For example, the refrigerant charging and maintenance reminder signal can be emitted from the vehicle's central control screen, and a pop-up window will display a reminder message to prompt the user to inspect and repair the air conditioning system. Subsequently, each time the vehicle is powered on, a pop-up window will be displayed to the user, automatically exiting after 3 seconds. After the user or repair personnel have completed the inspection, they need to select the "Inspection and Repair Completed" function button in the settings interface, at which point the refrigerant charging and maintenance reminder signal will be turned off, and will not be prompted again until a refrigerant abnormality signal is received again. Optionally, when the target vehicle needs to provide the user with a refrigerant charging and maintenance reminder, the refrigerant charging and maintenance signal can be sent to the user's mobile phone or other mobile device.

[0068] In some embodiments, before acquiring refrigerant test data, it is also necessary to determine whether the refrigerant test conditions are met to ensure the accuracy of the refrigerant test. Optionally, before acquiring refrigerant test data, the method further includes: acquiring a vehicle target signal; determining the vehicle state based on the vehicle target signal; if it is determined based on the vehicle state that the refrigerant test conditions are met, then acquiring the refrigerant test data; if it is determined based on the vehicle state that the refrigerant test conditions are not met, then not acquiring the refrigerant test data.

[0069] Specifically, when processing a refrigerant testing request, the target vehicle needs to be determined as follows: Based on the Ready signal, vehicle speed signal, four-door lock status signal, driver's seat occupancy status signal, passenger seat occupancy status signal, second-row right-side seat occupancy status signal, second-row left-side seat occupancy status signal, battery true SOC signal, vehicle charging mode signal, left illuminance signal, right illuminance signal, outside temperature signal, and inside temperature signal, the vehicle status is determined. Vehicle status includes at least one of the following: vehicle movement status, vehicle usage status, vehicle lock status, vehicle seat occupancy status, vehicle battery status, vehicle charging status, vehicle illuminance, outside temperature, and inside temperature. The vehicle status is determined when it is determined to be stationary, not in use, locked and unoccupied, with a battery state of charge greater than a set threshold (e.g., battery state of charge > 50%), not charging, or with illuminance less than a set threshold (e.g., vehicle illuminance less than 100W / m²). 2The refrigerant detection condition is met when at least one of the following conditions is met: the outside temperature is greater than a first set temperature threshold (e.g., outside temperature greater than 5°C), and the temperature difference between the inside and outside of the vehicle is less than or equal to a second set temperature threshold (e.g., temperature difference between the inside and outside of the vehicle ≤ 5°C). The Ready signal is used to determine whether the vehicle is started. For example, for electric vehicles, the Ready signal is whether the brake is pressed; for non-electric vehicles, the Ready signal is whether the key is turned or the start button is pressed. The vehicle charging status is included as a refrigerant detection condition because battery thermal management is involved during charging. During DC fast charging, the battery generates a large amount of heat, activating the compressor for heat dissipation, which affects the refrigerant detection. Furthermore, the determination of vehicle usage status is to avoid affecting the user's riding experience, while the determination of vehicle battery status is to ensure that the battery has sufficient power to provide power for the detection. The determinations of vehicle light intensity, outside temperature, and inside temperature are to improve the accuracy of the detection.

[0070] The vehicle air conditioning system refrigerant detection method provided in this embodiment can detect the refrigerant status of the vehicle air conditioning system and promptly remind users to add refrigerant for maintenance. Regardless of the season or the vehicle's usage time, it can detect the refrigerant status of the vehicle air conditioning system, allowing users to know the refrigerant status and add refrigerant in a timely manner when the air conditioning comfort still meets the user's basic needs, thus ensuring the cooling effect of the vehicle air conditioning system.

[0071] In a specific embodiment, based on the above embodiments, the vehicle and the server establish a communication connection. The vehicle responds to the user's detection activation operation by sending a detection activation signal (refrigerant charging and maintenance reminder function switch status signal) to the server. Upon receiving the detection activation signal, the server determines the refrigerant detection cycle and, based on the cycle, determines the detection date. During a preset time period on the detection date, the vehicle sends a refrigerant detection request. Upon receiving the refrigerant detection request, the vehicle acquires the vehicle target signal and, based on the target signal, determines the vehicle status. If, based on the vehicle status, the refrigerant detection conditions are met, the vehicle acquires the refrigerant detection data and sends it back to the server. The server, based on the refrigerant detection data, determines whether the refrigerant is abnormal or normal.

[0072] Corresponding to the method for detecting refrigerant in a vehicle air conditioning system provided in this disclosure, this disclosure also provides a device for detecting refrigerant in a vehicle air conditioning system. Figure 2 A structural block diagram of a refrigerant detection device for a vehicle air conditioning system provided in this disclosure embodiment is shown below. Figure 2 As shown, the refrigerant detection device for the vehicle air conditioning system includes:

[0073] The data acquisition module 21 is used to acquire the refrigerant detection data of the target vehicle. The refrigerant detection data is related to the degree of refrigerant deficiency.

[0074] The refrigerant status judgment module 22 is used to determine the refrigerant status based on the refrigerant detection data. The refrigerant status includes refrigerant abnormality or refrigerant normality. The refrigerant status is used to characterize the degree of refrigerant deficiency. When the refrigerant is abnormal, the degree of refrigerant deficiency is greater than the deficiency degree set threshold, and the deficiency degree set threshold is less than the deficiency degree reference threshold corresponding to the normal cooling effect.

[0075] In some embodiments, the data acquisition module 21 is specifically used for:

[0076] Determine the testing cycle for the refrigerant;

[0077] The testing date is determined based on the testing cycle;

[0078] Refrigerant test data is acquired during a preset time period on the test date.

[0079] In some embodiments, the data acquisition module 21 is specifically used for:

[0080] Based on the average temperature of the target vehicle's location within a preset number of days, the first inspection cycle is determined, and this first inspection cycle is defined as the inspection cycle; or...

[0081] The first inspection cycle is determined based on the average temperature of the target vehicle's location within a preset number of days. The inspection cycle correction value is determined based on the target vehicle's life cycle. The sum of the first inspection cycle and the inspection cycle correction value is determined as the inspection cycle.

[0082] In some embodiments, the refrigerant detection data includes the vehicle's external temperature, the air conditioning system's high-pressure pressure, the temperature at the left-side air outlet, and the temperature at the right-side air outlet; the data acquisition module 21 is specifically used for:

[0083] The target detection system for controlling the target vehicle operates under preset conditions. The target detection system includes an air conditioning control system, a compressor, and a thermal management control system.

[0084] After the air conditioning system is working stably, the external temperature of the vehicle, the high pressure of the air conditioning system, the temperature of the left air vent, and the temperature of the right air vent are obtained.

[0085] In some embodiments, the preset operating conditions include:

[0086] The air conditioning system operates in the following modes: face blowing mode, external circulation mode, maximum cooling, maximum fan speed, and rear air conditioning off.

[0087] The compressor operates at a preset speed; and,

[0088] Battery thermal management is off, the passenger compartment is in cooling mode, and the drive system uses drive cooling function.

[0089] In some embodiments, the refrigerant detection device for the vehicle air conditioning system further includes a detection and determination module, used for:

[0090] Before obtaining the refrigerant detection data of the target vehicle, determine that the vehicle status meets at least one of the following conditions: the vehicle is stationary, the vehicle is not in use, the vehicle is locked and no one is inside, the battery charge state is greater than the set charge threshold, the vehicle is not charging, the vehicle light intensity is less than the set light intensity threshold, the outside temperature is greater than the first set temperature threshold, and the temperature difference between the inside and outside of the vehicle is less than or equal to the second set temperature threshold.

[0091] In some embodiments, the refrigerant detection data includes the vehicle's external temperature, the air conditioning system's high-pressure pressure, the temperature at the left-side air outlet, and the temperature at the right-side air outlet; the refrigerant status judgment module 22 is specifically used for:

[0092] Based on the vehicle's external temperature, determine the corresponding range of abnormal average air outlet temperature and the range of abnormal high pressure in the air conditioning system; compare the average air outlet temperature with the range of abnormal average air outlet temperature, and compare the air conditioning system high pressure with the range of abnormal high pressure in the air conditioning system, wherein the average air outlet temperature is the average of the air outlet temperatures on the left and right sides; based on the comparison results, determine the refrigerant status.

[0093] The vehicle air conditioning system refrigerant detection device disclosed in the above embodiments can perform the vehicle air conditioning system refrigerant detection method disclosed in the corresponding embodiments above, and has the same or corresponding beneficial effects. To avoid repetition, it will not be described again here.

[0094] This disclosure also provides a computer-readable storage medium that stores a program or instructions that cause a computer to perform the steps of any of the above methods.

[0095] For example, a program or instructions cause a computer to perform a method for detecting refrigerant in a vehicle air conditioning system, the method comprising:

[0096] Obtain refrigerant testing data for the target vehicle; the refrigerant testing data is related to the degree of refrigerant deficiency.

[0097] Based on refrigerant detection data, the refrigerant status is determined. The refrigerant status includes refrigerant abnormality or refrigerant normality. The refrigerant status is used to characterize the degree of refrigerant deficiency. When the refrigerant is abnormal, the degree of refrigerant deficiency is greater than the set threshold for the degree of deficiency, and the set threshold for the degree of deficiency is less than the reference threshold for the degree of deficiency corresponding to normal cooling effect.

[0098] Optionally, when executed by a computer processor, the computer-executable instructions can also be used to execute the technical solutions of any of the vehicle air conditioning system refrigerant detection methods provided in the embodiments of this disclosure, thereby achieving the corresponding beneficial effects.

[0099] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the embodiments of this disclosure can be implemented using software and necessary general-purpose hardware, and of course, they can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solutions of the embodiments of this disclosure, in essence, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of the various embodiments of this disclosure.

[0100] This disclosure also provides an electronic device, including a processor and a memory; the processor executes the steps of any of the above methods by calling programs or instructions stored in the memory, thereby achieving the corresponding beneficial effects.

[0101] Figure 3 This is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of this disclosure. Figure 3 As shown, the electronic device includes one or more processors 301 and memory 302.

[0102] The processor 301 may be a central processing unit (CPU) or other form of processing unit with data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.

[0103] The memory 302 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. Volatile memory may include, for example, random access memory (RAM) and / or cache memory. Non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 301 may execute the program instructions to implement the vehicle air conditioning system refrigerant detection method of the embodiments of this disclosure described above, and / or other desired functions. Various contents such as input signals, signal components, and noise components may also be stored in the computer-readable storage medium.

[0104] In one example, the electronic device may also include an input device 303 and an output device 304, which are interconnected via a bus system and / or other forms of connection mechanism (not shown).

[0105] In addition, the input device 303 may also include, for example, a keyboard, a mouse, etc.

[0106] The output device 304 can output various information to the outside, including determined distance information, direction information, etc. The output device 304 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0107] Of course, for the sake of simplicity, Figure 3 Only some of the components of the electronic device relevant to this disclosure are shown, omitting components such as buses, input / output interfaces, etc. In addition, the electronic device may include any other suitable components depending on the specific application.

[0108] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0109] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. 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 this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for detecting refrigerant in a vehicle air conditioning system, characterized in that, The method is applied to vehicles and servers, including: Obtain refrigerant detection data for the target vehicle, wherein the refrigerant detection data is related to the degree of refrigerant deficiency; Based on the refrigerant detection data, the refrigerant status is determined. The refrigerant status includes refrigerant abnormality or refrigerant normality. The refrigerant status is used to characterize the degree of refrigerant deficiency. When the refrigerant is abnormal, the degree of refrigerant deficiency is greater than the set threshold for the degree of deficiency, and the set threshold for the degree of deficiency is less than the reference threshold for the degree of deficiency corresponding to normal cooling effect. Prior to acquiring the refrigerant detection data of the target vehicle, the method further includes: In response to the user's triggering operation, the target vehicle sends a detection activation signal to the server; When the server receives the detection activation signal, it determines the detection cycle for the refrigerant, determines a first detection cycle based on the average temperature of the target vehicle's location within a preset number of days, and sets the first detection cycle as the detection cycle; or, it determines a first detection cycle based on the average temperature of the target vehicle's location within a preset number of days, determines a detection cycle correction value based on the target vehicle's lifespan, and sets the sum of the first detection cycle and the detection cycle correction value as the detection cycle. The server determines the refrigerant detection date as the sum of the date the refrigerant detection function is activated and the detection cycle. The server sends a refrigerant testing request to the target vehicle during a preset time period on the testing date; The target vehicle triggers the operation of its air conditioning system and collects refrigerant detection data based on the refrigerant detection request, and then sends the data to the server. The server obtains the refrigerant detection data.

2. The method according to claim 1, characterized in that, The refrigerant detection data includes the vehicle's external temperature, air conditioning system high-pressure, left-side air vent temperature, and right-side air vent temperature; the acquisition of the target vehicle's refrigerant detection data includes: The target detection system of the target vehicle is controlled to operate under preset conditions. The target detection system includes an air conditioning control system, a compressor, and a thermal management control system. After the air conditioning system is operating stably, the external temperature of the vehicle, the high pressure of the air conditioning system, the temperature of the left air outlet, and the temperature of the right air outlet are obtained.

3. The method according to claim 2, characterized in that, The preset operating conditions include: The air conditioning system operates in the following modes: face blowing mode, external circulation mode, maximum cooling, maximum fan speed, and air conditioning off. The compressor operates at a preset speed; and, Battery thermal management is off, the passenger compartment is in cooling mode, and the drive system uses drive cooling function.

4. The method according to claim 1, characterized in that, Before acquiring the refrigerant detection data of the target vehicle, the method further includes: The vehicle status is determined to meet at least one of the following conditions: the vehicle is stationary, the vehicle is not in use, the vehicle is locked and no one is inside, the battery state of charge is greater than a set power threshold, the vehicle is not charging, the vehicle light intensity is less than a set light intensity threshold, the outside temperature is greater than a first set temperature threshold, and the temperature difference between the inside and outside of the vehicle is less than or equal to a second set temperature threshold.

5. The method according to claim 1, characterized in that, The refrigerant detection data includes the vehicle's external temperature, the air conditioning system's high-pressure pressure, the temperature of the left-side air outlet, and the temperature of the right-side air outlet. Determining the refrigerant state based on the refrigerant detection data includes: Based on the vehicle's external temperature, determine the corresponding range of average air outlet temperature anomalies and the range of high-pressure anomalies in the air conditioning system. The average air outlet temperature is compared with the range of abnormal values ​​of the average air outlet temperature, and the high pressure of the air conditioning system is compared with the range of abnormal values ​​of the high pressure of the air conditioning system. The average air outlet temperature is the average of the air outlet temperature on the left side and the air outlet temperature on the right side. Based on the comparison results, the state of the refrigerant is determined.

6. A detection device for refrigerant in a vehicle air conditioning system according to any one of claims 1 to 5, characterized in that, include: The data acquisition module is used to acquire refrigerant detection data of the target vehicle, wherein the refrigerant detection data is related to the degree of refrigerant deficiency; The refrigerant status judgment module is used to determine the refrigerant status based on the refrigerant detection data. The refrigerant status includes refrigerant abnormality or refrigerant normality. The refrigerant status is used to characterize the degree of refrigerant deficiency. When the refrigerant is abnormal, the degree of refrigerant deficiency is greater than a set threshold for the degree of deficiency, and the set threshold for the degree of deficiency is less than the reference threshold for the degree of deficiency corresponding to normal cooling effect.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a program or instructions that cause a computer to perform the steps of the method as described in any one of claims 1 to 5.

8. An electronic device, characterized in that, include: Processor and memory; The processor executes the steps of the method as described in any one of claims 1 to 5 by invoking programs or instructions stored in the memory.

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