Automobile-based Refrigerant Quantity Detection Method, Device, Equipment and Medium

Abstract

The present application provides a refrigerant quantity detection method, device, equipment and medium for an automobile, including: judging whether to enter the refrigerant quantity detection mode according to the detection time interval, the working state of the thermal management system of the automobile and the inclination degree of the automobile; when it is judged that the refrigerant quantity detection mode is entered, controlling the low-pressure pressure at the intake pipe of the compressor in the thermal management system to reach the low-pressure protection pressure; by means of the upper liquid level sensor and the lower liquid level sensor arranged in the condenser of the condensation system, when it is determined that the liquid level position of the refrigerant in the condenser exceeds the position where the upper liquid level sensor is located or is lower than the position where the lower liquid level sensor is located, generating corresponding reminder messages. The present application realizes the accurate detection of the refrigerant quantity, effectively improves the service life of the automobile and increases the safety of the automobile.

Description

Technical Field

[0001] The present application relates to the technical field of refrigerant detection, and particularly to a method, device, equipment and medium for detecting the refrigerant amount based on an automobile. Background Art

[0002] In an electric vehicle thermal management system, a refrigerant is usually used to achieve the effect of transferring or absorbing heat energy, so as to realize the cooling of the battery pack of the electric vehicle and the temperature control of the engine compartment and the cab. However, as the usage time extends, the refrigerant in the thermal management system will more or less leak. After the refrigerant leaks, there will be problems of insufficient cooling capacity and heating capacity. At the same time, after the system is repaired and refilled with refrigerant, there may be problems of overfilling or underfilling, which directly affect the service life of the vehicle. Therefore, realizing the detection function of the refrigerant amount in the thermal management system plays an important role in extending the service life of the vehicle and increasing the safety of the vehicle.

[0003] In the prior art, during the vehicle manufacturing process, technicians often calibrate some parameters in the thermal management system, such as: exhaust superheat, suction superheat, subcooling degree, etc., and compare the actual values of these parameters with the preset values to determine whether the refrigerant leaks.

[0004] However, in actual situations, under working conditions such as different ambient temperatures and driving speeds, the actual values of these parameters in the thermal management system change significantly, and cannot accurately reflect whether the refrigerant in the system leaks. However, the inability to accurately detect the refrigerant amount directly affects the service life of the vehicle; in addition, the prior art needs to calibrate more parameters, increasing the difficulty of detecting the refrigerant amount. Summary of the Invention

[0005] The present application provides a method, device, equipment and medium for detecting the refrigerant amount based on an automobile, which realizes more accurate detection of the refrigerant amount, thereby effectively improving the service life of the vehicle and increasing the safety of the vehicle.

[0006] In a first aspect, the present application provides a method for detecting the refrigerant amount based on an automobile, including:

[0007] Judging whether to enter the refrigerant amount detection mode according to the detection time interval, the working state of the thermal management system of the vehicle and the inclination degree of the vehicle;

[0008] When it is judged that the refrigerant amount detection mode is entered, controlling the low pressure at the compressor inlet pipe in the thermal management system to reach the low pressure protection pressure;

[0009] By setting an upper liquid level sensor and a lower liquid level sensor for the condenser in the condensation system, when it is determined that the liquid level position of the refrigerant in the condenser exceeds the position where the upper liquid level sensor is located or is lower than the position where the lower liquid level sensor is located, a corresponding reminder message is generated.

[0010] In a specific embodiment, the determining whether to enter the refrigerant quantity detection mode according to the detection time interval, the working state of the vehicle's thermal management system, and the inclination degree of the vehicle includes:

[0011] When it is determined that the detection time interval is greater than or equal to a preset detection time interval, determine whether the working state of the vehicle's thermal management system is in an idle state;

[0012] When it is determined that the working state of the vehicle's thermal management system is in an idle state, determine whether the inclination degree of the vehicle is less than or equal to a preset inclination rate;

[0013] When it is determined that the inclination degree of the vehicle is less than or equal to the preset inclination rate, it is determined to enter the refrigerant quantity detection mode.

[0014] In a specific embodiment, the controlling the low-pressure pressure at the compressor intake pipe in the heat pipe system to reach the low-pressure protection pressure includes:

[0015] Close the first valve on the condenser liquid pipe, and start the external fan and the compressor in the thermal management system, so that the refrigerant distributed in the thermal management system is compressed into the condenser and the refrigerant in the condenser is condensed;

[0016] Trigger the pressure sensor on the condenser gas pipe to obtain the low-pressure pressure in the condenser gas pipe, and when the low-pressure pressure reaches the low-pressure protection pressure, close the external fan, the compressor, and the second valve on the condenser gas pipe.

[0017] In a specific embodiment, the starting the external fan in the thermal management system includes:

[0018] Start the external fan to rotate at a preset speed;

[0019] Or,

[0020] Obtain the ambient temperature of the vehicle, and determine the rotation speed according to the ambient temperature, so as to start the external fan to rotate at the rotation speed.

[0021] In a specific embodiment, the starting the compressor in the thermal management system includes:

[0022] Start the compressor to compress the refrigerant at a preset frequency.

[0023] Second aspect, the present application provides a refrigerant amount detection device based on an automobile, including:

[0024] A judgment module, configured to judge whether to enter the refrigerant amount detection mode according to the detection time interval, the working state of the thermal management system of the automobile, and the inclination degree of the automobile;

[0025] A control module, configured to control the low-pressure pressure at the compressor inlet pipe in the thermal management system to reach the low-pressure protection pressure when it is judged that the refrigerant amount detection mode is entered;

[0026] A processing module, configured to generate corresponding reminder messages by using an upper liquid level sensor and a lower liquid level sensor arranged on a condenser in a condensation system when it is determined that the liquid level position of the refrigerant in the condenser exceeds the position where the upper liquid level sensor is located or is lower than the position where the lower liquid level sensor is located.

[0027] In a specific embodiment, the judgment module is specifically configured to:

[0028] When it is determined that the detection time interval is greater than or equal to a preset detection time interval, determine whether the working state of the thermal management system of the automobile is in an idle state;

[0029] When it is determined that the working state of the thermal management system of the automobile is in an idle state, determine whether the inclination degree of the automobile is less than or equal to a preset inclination rate;

[0030] When it is determined that the inclination degree of the automobile is less than or equal to the preset inclination rate, judge to enter the refrigerant amount detection mode.

[0031] In a specific embodiment, the control module is specifically configured to:

[0032] Close the first valve on the condenser liquid pipe, and start the external fan and the compressor in the thermal management system, so that the refrigerant distributed in the thermal management system is compressed into the condenser, and the refrigerant in the condenser is condensed;

[0033] Trigger the pressure sensor on the condenser air pipe to obtain the low-pressure pressure in the condenser air pipe, and when the low-pressure pressure reaches the low-pressure protection pressure, close the external fan, the compressor, and the second valve on the condenser air pipe.

[0034] In a specific embodiment, the control module is further configured to:

[0035] Start the external fan to rotate at a preset speed;

[0036] Or,

[0037] Obtain the ambient temperature of the vehicle, and determine the rotation speed according to the ambient temperature, so as to start the external fan to rotate at the rotation speed.

[0038] In a specific embodiment, the control module is further configured to:

[0039] Start the compressor to compress the refrigerant according to a preset frequency.

[0040] In a third aspect, the present application provides an electronic device, including:

[0041] A processor, a memory, and a communication interface;

[0042] The memory is used to store the executable instructions of the processor;

[0043] Wherein, the processor is configured to execute the refrigerant quantity detection method based on the vehicle described in the first aspect by executing the executable instructions.

[0044] In a fourth aspect, the present application provides a readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the refrigerant quantity detection method based on the vehicle described in the first aspect.

[0045] A refrigerant quantity detection method, device, equipment and medium based on a vehicle provided by the present application, by judging whether to enter the refrigerant quantity detection mode according to the detection time interval, the working state of the vehicle's thermal management system and the inclination degree of the vehicle; when it is judged that the refrigerant quantity detection mode is entered, controlling the low-pressure pressure at the intake pipe of the compressor in the thermal management system to reach the low-pressure protection pressure; by setting the upper liquid level sensor and the lower liquid level sensor of the condenser in the condensation system, when it is determined that the liquid level position of the refrigerant in the condenser exceeds the position where the upper liquid level sensor is located, or is lower than the position where the lower liquid level sensor is located, generating corresponding reminder messages. Since the present application considers the detection time period, the working state of the vehicle's thermal management system, and the inclination degree of the vehicle to judge in what circumstances the refrigerant quantity can be effectively detected, and when the detection can be carried out, based on the control of the low-pressure pressure at the intake pipe of the compressor in the thermal management system and the cooperation of the upper liquid level sensor and the lower liquid level sensor of the condenser for detection, it thus more effectively realizes the accurate detection of the refrigerant quantity, and can generate corresponding reminder messages when the refrigerant quantity is too high or too low to perform corresponding processing on the refrigerant, thereby effectively improving the service life of the vehicle and increasing the safety of the vehicle. Description of the Drawings

[0046] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0047] Figure 1 System structure diagram of a refrigerant amount detection method based on an automobile provided by the present application;

[0048] Figure 2 Flow schematic diagram of Embodiment 1 of a refrigerant amount detection method based on an automobile provided by the present application;

[0049] Figure 3 Flow schematic diagram of Embodiment 2 of a refrigerant amount detection method based on an automobile provided by the present application;

[0050] Figure 4 Flow schematic diagram of Embodiment 3 of a refrigerant amount detection method based on an automobile provided by the present application;

[0051] Figure 5 Structure schematic diagram of a refrigerant amount detection device based on an automobile provided by the embodiments of the present application;

[0052] Figure 6 Structure schematic diagram of an electronic device provided by the present application. Specific implementation manners

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, rather than all, of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments made by those of ordinary skill in the art under the inspiration of this embodiment belong to the scope of protection of the present application.

[0054] In the description, claims and above-mentioned drawings of this application, terms such as "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily limit to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0055] First, the nouns involved in this application are explained as follows:

[0056] An automotive thermal management system is mainly used for cooling and temperature control, such as cooling the engine, engine oil, lubricating oil, charge air, fuel, electronic devices, and exhaust gas recirculation (EGR for short), and controlling the temperature of the engine compartment and the cab. The automotive thermal management system consists of multiple components and heat transfer fluids. The components include heat exchangers, fans, coolant pumps, compressors, thermostats, sensors, actuators, cooling water jackets, and various pipes; the heat transfer fluids include air, coolant, engine oil, lubricating oil, exhaust gas, fuel, refrigerant, etc. These components and fluids must work in coordination to meet the vehicle's heat dissipation and temperature control requirements.

[0057] Refrigerant: Commonly known as refrigerant, it is a working fluid used to transfer heat energy and produce a refrigeration effect in systems such as refrigeration and air conditioning.

[0058] Degree of superheat refers to the difference between the superheat temperature and the saturation temperature of the refrigerant under the same evaporation pressure in a refrigeration cycle.

[0059] Degree of under cooling refers to the difference between the temperature of condensed water and the saturation temperature under the corresponding pressure at a certain pressure.

[0060] In an electric vehicle thermal management system, a refrigerant is usually used to transfer or absorb heat energy, thereby achieving temperature control of the battery pack of the electric vehicle, the engine compartment, and the cab. However, as the usage time extends, the refrigerant in the thermal management system will more or less leak. After the refrigerant leaks, there will be problems of insufficient cooling capacity and heating capacity. At the same time, after the system is repaired and refilled with refrigerant, there may be problems of overcharging or undercharging, which directly affects the service life of the vehicle. Therefore, realizing the detection function of the refrigerant amount in the thermal management system plays an important role in extending the service life of the vehicle. In the prior art, certain parameters in the thermal management system are often calibrated by detecting the superheat of the exhaust gas, the superheat of the suction gas, the subcooling degree, the protection pressure, etc., and comparing the actual values of these parameters with the preset values, and comparing the set values of these parameters with the actual values to determine whether the refrigerant leaks. However, under working conditions such as different ambient temperatures and driving speeds, that is, under conditions such as different ambient temperatures, different driving speeds, and the operating state of the compressor, the actual values of these parameters in the above thermal management system change significantly, and cannot accurately reflect whether the refrigerant in the system leaks, thereby affecting the user experience and system reliability; in addition, the prior art needs to calibrate more parameters, increasing the difficulty of detecting the refrigerant amount. Based on the above technical problems, the technical concept process of this application is as follows: how to more accurately detect the refrigerant amount, so as to effectively improve the service life of the vehicle.

[0061] The following will provide a detailed description of the refrigerant amount detection method based on a vehicle of this application.

[0062] Exemplarily, Figure 1 is a structural diagram of a thermal management system applied to a refrigerant amount detection method based on a vehicle provided by this application. As Figure 1 shown, this system is arranged in a vehicle, and its structure may include: a refrigerant amount detection device (not shown) and a condensation system. Among them, the condensation system includes: a condenser gas pipe 101, a condenser 102, an upper liquid level sensor 103 and a lower liquid level sensor 104 arranged on the condenser 102, a condenser liquid pipe 105, a liquid receiver 106, a valve 107, a valve 108, a compressor, and an external fan (not shown). Among them, the valve 107 can be any one of a solenoid valve or an electronic expansion valve, and the valve 108 can be a solenoid valve.

[0063] In addition, the refrigerant measurement device can control the condensation system, etc. It should be noted that Figure 1 is only a structural schematic diagram of a system of a refrigerant amount detection method based on a vehicle provided by an embodiment of this application. The embodiments of this application do not limit Figure 1 the actual forms of various devices included in Figure 1 nor limit

[0064] Figure 2 The flowchart of the first embodiment of a refrigerant amount detection method based on an automobile provided for this application. Refer to Figure 2 , the refrigerant amount detection method based on the automobile specifically includes the following steps:

[0065] Step S201, determine whether to enter the refrigerant amount detection mode according to the detection time interval, the working state of the thermal management system of the automobile, and the inclination degree of the automobile.

[0066] In this embodiment, the detection time interval is the time interval between the current detection and the most recent detection. The working state of the thermal management system of the automobile includes the running state and the idle state. The inclination degree of the automobile is the inclination degree of the automobile body relative to the horizontal plane position, and the inclination degree is represented by the included angle between the plane where the automobile body is currently located and the plane where the horizontal plane is located.

[0067] In addition, for example, when the detection time interval reaches the preset time interval, the working state of the thermal management system of the automobile is in the idle state, and the inclination degree of the automobile is less than or equal to the preset inclination rate, it can be considered that it is relatively more accurate to perform the refrigerant amount detection at this time. Therefore, it can be determined to enter the refrigerant amount detection mode.

[0068] Step S202, when it is determined to enter the refrigerant amount detection mode, control the low-pressure pressure at the compressor inlet pipe in the thermal management system to reach the low-pressure protection pressure.

[0069] In this embodiment, after step S201 determines that the refrigerant amount detection should be performed currently, the compressor in the thermal management system starts to work. The compressor continuously compresses the refrigerant gas, making the pressure at the compressor inlet pipe smaller and smaller. The pressure at the compressor inlet pipe is called the low-pressure pressure, and this low-pressure pressure gradually decreases and finally reaches the low-pressure protection pressure.

[0070] Step S203, through the upper liquid level sensor and the lower liquid level sensor provided in the condenser in the condensation system, generate corresponding reminder messages when it is determined that the liquid level position of the refrigerant in the condenser exceeds the position where the upper liquid level sensor is located or is lower than the position where the lower liquid level sensor is located.

[0071] In this embodiment, the refrigerant quantity detection is started. The refrigerant is located in the condenser of the condensing system. The current refrigerant content is obtained through the signal values of the upper liquid level sensor and the lower liquid level sensor of the condenser arranged in the condensing system. The upper liquid level sensor is installed at the position of the maximum refrigerant quantity in the system, and the lower liquid level sensor is installed at the position of the minimum refrigerant quantity in the system. If the liquid level position of the refrigerant in the condenser at this time exceeds the position of the upper liquid level sensor, that is, the refrigerant quantity in the condenser exceeds the maximum value that the refrigerant system can withstand, the upper liquid level sensor will send a signal to remind the user that the current refrigerant quantity is too much; if the liquid level position of the refrigerant in the condenser at this time is lower than the position of the lower liquid level sensor, that is, the refrigerant quantity in the condenser is less than the minimum value for the normal operation of the refrigerant system, the lower liquid level sensor will send a signal to remind the user that the current refrigerant quantity is too little, so as to achieve the purpose of reminding the user to check in time when the refrigerant quantity in the refrigerant system is not at the normal level. The reminder message generated in this embodiment can be a voice broadcast alarm message or an indicator light flashing reminder message, and the present application does not limit this.

[0072] In this embodiment, according to the detection time interval, the working state of the vehicle's thermal management system, and the inclination degree of the vehicle, it is judged whether to enter the refrigerant quantity detection mode; when it is judged to enter the refrigerant quantity detection mode, the low pressure at the intake pipe of the compressor in the thermal management system is controlled to reach the low pressure protection pressure; through the upper liquid level sensor and the lower liquid level sensor of the condenser arranged in the condensing system, when it is determined that the liquid level position of the refrigerant in the condenser exceeds the position of the upper liquid level sensor or is lower than the position of the lower liquid level sensor, a corresponding reminder message is generated. Since the liquid level position of the refrigerant in the condenser can be determined according to the upper liquid level sensor and the lower liquid level sensor arranged in the condensing system, and then the corresponding reminder message is generated, it can remind the user to check in time, realizing accurate refrigerant quantity detection and judgment under any working conditions, improving the user experience, and ensuring the reliability of the system.

[0073] Figure 3 This is a flowchart of Embodiment 2 of a refrigerant quantity detection method based on a vehicle provided by the present application. On the basis of the above Figure 2 shown embodiment, as Figure 3 shown, the specific implementation manner of judging whether to enter the refrigerant quantity detection mode in the above step S201 includes:

[0074] Step S301: Judge whether the detection time interval is greater than or equal to the preset detection time interval. If so, execute step S302; if not, continue to wait until the judgment condition is met.

[0075] In this embodiment, the refrigerant detection mode can perform detection once every fixed time interval. Therefore, it is necessary to determine whether the detection time interval reaches the preset time interval. The detection time interval is the time interval between the current detection and the most recent detection. Compare the detection time interval with the preset detection time interval. If the detection time interval is greater than or equal to the preset detection time interval, it indicates that the refrigerant amount needs to be detected, and step S302 is executed; if the detection time interval is less than the preset detection time interval, it indicates that the refrigerant amount does not need to be detected temporarily, and continue to wait until the judgment condition is met.

[0076] Step S302: Determine whether the working state of the thermal management system of the vehicle is in an idle state. If so, execute step S303; if not, continue to wait until the judgment condition is met.

[0077] In this embodiment, since when detecting the refrigerant amount, the thermal management system cannot respond to other requests, such as the refrigeration / heating request of the air conditioning system in the cockpit and the heat dissipation requests of the vehicle drive system and the battery system, it is necessary to determine whether the working state of the current vehicle's thermal management system is in an idle state. If so, execute step S303; if not, continue to wait until the judgment condition is met.

[0078] Step S303: Determine whether the inclination degree of the vehicle is less than or equal to the preset inclination rate. If so, execute step S304; if not, adjust until the judgment condition is met.

[0079] In this embodiment, since when judging the position of the refrigerant liquid level in the condenser of the condensation system, a significant inclination of the vehicle body will have a greater impact on the position of the refrigerant liquid level, resulting in the fact that the positional relationship between the refrigerant liquid level at this time and the upper liquid level sensor and the lower liquid level sensor cannot accurately reflect the refrigerant content in the condenser of the condensation system. Therefore, it is necessary to use a vehicle body angle sensor to detect the included angle between the plane where the current vehicle body is located and the plane where the horizontal plane is located, and obtain the inclination angle of the vehicle, that is, the inclination degree of the current vehicle. The preset inclination rate is the angle range satisfied by the included angle between the plane where the vehicle body is located and the plane where the horizontal plane is located when the plane where the vehicle body is located is basically the same as the plane where the horizontal plane is located. Compare the detected inclination degree of the vehicle with the preset inclination rate. If it is less than or equal to the preset inclination rate, it indicates that the inclination degree of the vehicle body is not obvious at this time, and step S304 is executed; if it is greater than the preset inclination rate, it indicates that the vehicle body is significantly inclined, and the position of the vehicle body should be adjusted until the judgment condition is met. In this example, the vehicle body angle sensor can be a dynamic inclination sensor, a static inclination sensor, a servo inclination sensor, etc. The form of the sensor in this application is not specifically limited.

[0080] Step S304: Enter the refrigerant amount detection mode.

[0081] In this embodiment, if all of the above three judgment conditions are satisfied, it indicates that the refrigerant amount of the thermal management system should be detected at this time.

[0082] In this embodiment, by judging whether the detection time interval is greater than or equal to the preset detection time interval, judging whether the working state of the thermal management system of the vehicle is in an idle state, and judging whether the inclination angle of the vehicle is less than or equal to the preset inclination angle, it is determined whether the vehicle needs to detect the refrigerant amount at this time. Since the detection time interval is preset, the refrigerant amount in the thermal management system can be automatically detected regularly, without being restricted by the working conditions; at the same time, due to the addition of other judgment conditions, the influence factors that interfere with the refrigerant amount are avoided from affecting the accuracy of the detection result, making the detection result accurate and reliable.

[0083] Based on the above-mentioned first and second embodiments, the following further describes a refrigerant amount detection method provided by the present application for vehicles. Figure 4 It is a schematic flowchart of the third embodiment of a refrigerant amount detection method for vehicles provided by the present application. As Figure 4 shown, the specific implementation manners of the refrigerant amount detection mode in step S202 and step S203 include:

[0084] Step S401, enter the refrigerant amount detection mode.

[0085] Step S402, close the first valve on the condenser liquid pipe, and start the external fan and the compressor in the thermal management system, so that the refrigerant distributed in the thermal management system is compressed into the condenser, and the refrigerant in the condenser is condensed.

[0086] In this embodiment, taking Figure 1 as an example to continue the description, when detecting the refrigerant amount, first close the first valve on the condenser liquid pipe, that is, valve 107, so that the liquid refrigerant remains in the condenser 102, the condenser liquid pipe 105 and the liquid storage pipe 106. In this embodiment, the implementation form of valve 107 can be a solenoid valve or an electronic expansion valve, and the present application does not make any limitation thereto. In addition, for different vehicle brands, the liquid storage device 106 may or may not be available, and the present application does not make any limitation thereto. After closing valve 107, the compressor starts to operate. The compressor operation compresses the refrigerant distributed in the thermal management system into the condenser, and at the same time the external fan rotates to quickly condense the refrigerant in the condenser.

[0087] In this embodiment, the external fan in the thermal management system rotates at a preset speed, or obtains the ambient temperature of the vehicle, and determines the rotation speed according to the ambient temperature, and rotates at this rotation speed. When the compressor in the thermal management system operates, it compresses the refrigerant at a preset frequency.

[0088] Step S403: Trigger the pressure sensor on the compressor intake pipe to obtain the low-pressure in the compressor intake pipe, and when the low-pressure reaches the low-pressure protection pressure, close the external fan, the compressor, and the second valve on the condenser gas pipe.

[0089] In this embodiment, the compressor intake pipe is the low-pressure side of the thermal management system. When the compressor operates, the refrigerant distributed in the thermal management system will be compressed to the condenser, causing the low-pressure in the compressor intake pipe to gradually decrease. The low-pressure value of the thermal management system can be obtained through the pressure sensor set on the compressor intake pipe. When the low-pressure reaches the low-pressure protection pressure, it indicates that all or most of the refrigerant dispersed throughout the thermal management system has been compressed into the condenser, ensuring the accuracy of the detection result. At this time, close the external fan and the compressor, and the external fan and the compressor stop operating. Close the second valve on the condenser and the condenser gas pipe, that is, valve 108, so that the refrigerant is sealed in the condenser.

[0090] In this embodiment, the implementation form of valve 108 can be a solenoid valve. At the same time, the specific position of valve 108 can be at the connection between the condenser gas pipe 101 and the condenser 102, can also be set on the condenser gas pipe 101, or can also be set on the condenser 102. This application does not impose special restrictions on the position of valve 108.

[0091] Step S404: Obtain the relationship between the positions of the upper liquid level sensor and the lower liquid level sensor of the condenser in the condensation system and the refrigerant liquid level position to obtain the refrigerant amount in the system.

[0092] In this embodiment, the refrigerant is located in the condenser in the condensation system. The current refrigerant content is obtained through the signal values of the upper liquid level sensor and the lower liquid level sensor set in the condenser of the condensation system. The upper liquid level sensor is installed at the position of the maximum refrigerant amount in the system, and the lower liquid level sensor is installed at the position of the minimum refrigerant amount in the system. If the liquid level position of the refrigerant in the condenser exceeds the position of the upper liquid level sensor at this time, that is, the refrigerant amount in the condenser exceeds the maximum value that the refrigerant system can bear, the upper liquid level sensor will send a signal to remind the user that the current refrigerant amount is too much, and the user can take corresponding measures to reduce the refrigerant or stop injecting the refrigerant; if the liquid level position of the refrigerant in the condenser is lower than the position of the lower liquid level sensor at this time, that is, the refrigerant amount in the condenser is less than the minimum value for the refrigerant system to operate normally, the lower liquid level sensor will send a signal to remind the user that the current refrigerant amount is too little, and the user can take corresponding measures to increase the refrigerant amount; if the liquid level position of the refrigerant in the condenser is between the positions of the upper liquid level sensor and the lower liquid level sensor at this time, it means that the refrigerant amount in the condenser is at a normal level, and the user does not need to perform too many operations, achieving the purpose of reminding the user to check in time when the refrigerant amount in the refrigerant system is not at a normal level and taking corresponding measures to make the refrigerant amount in the refrigerant system return to the normal level.

[0093] In this embodiment, after entering the refrigerant quantity detection mode, the first valve on the condenser liquid pipe is closed, and the external fan and the compressor in the thermal management system are started, so that the refrigerant distributed in the thermal management system is compressed into the condenser, and the refrigerant in the condenser is condensed; the pressure sensor on the compressor intake pipe is triggered to obtain the low-pressure in the compressor intake pipe, and when the low-pressure reaches the low-pressure protection pressure, the external fan, the compressor and the second valve on the condenser gas pipe are closed; the relationship between the positions of the upper liquid level sensor and the lower liquid level sensor on the condenser in the condensation system and the refrigerant liquid level position is obtained to get the refrigerant quantity in the system, realizing that when the refrigerant quantity in the refrigerant system is not at the normal level, the user is reminded to check in time and corresponding measures are taken to make the refrigerant quantity in the refrigerant system return to the normal level.

[0094] Figure 5 The following is a schematic structural diagram of a refrigerant quantity detection device based on an automobile provided by an embodiment of the present application. As Figure 5 shown, the device 50 includes: a judgment module 501, a control module 502, and a processing module 503. Among them, the judgment module 501 is used to judge whether to enter the refrigerant quantity detection mode according to the detection time interval, the working state of the thermal management system of the automobile, and the inclination degree of the automobile; the control module 502 is used to control the low-pressure at the compressor intake pipe in the condenser intake pipe of the condensation system in the thermal management system to reach the low-pressure protection pressure when it is judged that the refrigerant quantity detection mode is entered; the processing module 503 is used to generate corresponding reminder messages by the upper liquid level sensor and the lower liquid level sensor provided on the condenser in the condensation system when it is determined that the liquid level position of the refrigerant in the condenser exceeds the position where the upper liquid level sensor is located or is lower than the position where the lower liquid level sensor is located.

[0095] In a possible implementation manner, the judgment module 501 is specifically used for: when it is determined that the detection time interval is greater than or equal to the preset detection time interval, determining whether the working state of the thermal management system of the automobile is in an idle state; when it is determined that the working state of the thermal management system of the automobile is in an idle state, determining whether the inclination degree of the automobile is less than or equal to the preset inclination rate; when it is determined that the inclination degree of the automobile is less than or equal to the preset inclination rate, judging to enter the refrigerant quantity detection mode.

[0096] The refrigerant quantity detection device based on an automobile provided by the embodiment of the present application can execute the technical solution shown in the above method embodiment, and its implementation principle and beneficial effects are similar, and will not be described in detail here.

[0097] In a possible implementation, the control module 502 is specifically configured to: close the first valve on the condenser outlet liquid pipe, and start the external fan and the compressor in the thermal management system, so that the refrigerant distributed in the thermal management system is compressed into the cold condenser, and the refrigerant in the condenser is condensed; trigger the pressure sensor on the condenser gas pipe to collect and obtain the low-pressure in the condenser gas pipe, and when the low-pressure reaches the low-pressure protection pressure, close the external fan, the compressor and the second valve on the condenser inlet pipe.

[0098] The refrigerant quantity detection device based on an automobile provided by the embodiments of the present application can execute the technical solutions shown in the above method embodiments, and the implementation principles and beneficial effects are similar, and will not be elaborated here.

[0099] In a possible implementation, start the external fan to rotate at a preset speed; or, obtain the ambient temperature of the automobile, and determine the rotation speed according to the ambient temperature, so as to start the external fan to rotate at the rotation speed.

[0100] In a possible implementation, start the compressor to compress the refrigerant at a preset frequency.

[0101] The refrigerant quantity detection device based on an automobile provided by the embodiments of the present application can execute the technical solutions shown in the above method embodiments, and the implementation principles and beneficial effects are similar, and will not be elaborated here.

[0102] Figure 6 It is a schematic structural diagram of an electronic device provided by the present application. As Figure 6 shown, the electronic device includes: at least one processor 601 and a memory 602. Among them, the memory 602 stores the executable instructions of the processor 601; the processor 601 is configured to execute the technical solutions in any of the foregoing method embodiments by executing the executable instructions.

[0103] Optionally, the memory 602 can be either independent or integrated with the processor 601.

[0104] The electronic device 60 further includes a communication component 603. Among them, the processor 601, the memory 602 and the communication component 603 are connected through a bus 604.

[0105] The electronic device is used to execute the technical solutions in any of the foregoing method embodiments, and the implementation principles and technical effects are similar, and will not be elaborated here.

[0106] The embodiments of the present application further provide a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, they are used to implement the technical solutions provided in any of the foregoing method embodiments.

[0107] An embodiment of the present application further provides a computer program product, including a computer program, which is used to implement the technical solutions provided in any of the foregoing method embodiments when executed by a processor.

[0108] Those of ordinary skill in the art can understand that all or part of the steps of implementing the foregoing method embodiments can be completed by hardware related to program instructions. The foregoing program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps including the foregoing method embodiments; and the foregoing storage medium includes: various media such as ROM, RAM, magnetic disk, or optical disk that can store program codes.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for detecting the refrigerant amount based on an automobile, characterized in that, it includes: judging whether to enter the refrigerant amount detection mode according to the detection time interval, the working state of the thermal management system of the automobile and the inclination degree of the automobile; when it is judged that the refrigerant amount detection mode is entered, controlling the low pressure at the compressor inlet pipe in the thermal management system to reach the low pressure protection pressure; by means of the upper liquid level sensor and the lower liquid level sensor arranged in the condenser of the condensation system, when it is determined that the liquid level position of the refrigerant in the condenser exceeds the position where the upper liquid level sensor is located or is lower than the position where the lower liquid level sensor is located, generating corresponding reminder messages; The controlling the low pressure at the compressor inlet pipe in the thermal management system to reach the low pressure protection pressure includes: closing the first valve on the condenser liquid pipe and starting the external fan and the compressor in the thermal management system, so that the refrigerant distributed in the thermal management system is compressed into the condenser and the refrigerant in the condenser is condensed; triggering the pressure sensor on the condenser gas pipe to obtain the low pressure in the compressor inlet pipe, and when the low pressure reaches the low pressure protection pressure, closing the external fan, the compressor and the second valve on the condenser gas pipe.

2. The method for detecting the refrigerant amount based on an automobile according to claim 1, characterized in that, the judging whether to enter the refrigerant amount detection mode according to the detection time interval, the working state of the thermal management system of the automobile and the inclination degree of the automobile includes: when it is determined that the detection time interval is greater than or equal to the preset detection time interval, determining whether the working state of the thermal management system of the automobile is in an idle state; when it is determined that the working state of the thermal management system of the automobile is in an idle state, determining whether the inclination degree of the automobile is less than or equal to the preset inclination rate; when it is determined that the inclination degree of the automobile is less than or equal to the preset inclination rate, judging to enter the refrigerant amount detection mode.

3. The method for detecting the refrigerant amount based on an automobile according to claim 1, characterized in that, the starting the external fan in the thermal management system includes: starting the external fan to rotate at a preset speed; or, acquiring the ambient temperature of the automobile and determining the rotation speed according to the ambient temperature, so as to start the external fan to rotate at the rotation speed.

4. The method for detecting the refrigerant amount based on an automobile according to claim 3, characterized in that, the starting the compressor in the thermal management system includes: starting the compressor to compress the refrigerant at a preset frequency.

5. A device for detecting the refrigerant amount based on an automobile, characterized in that, it includes: a judging module, configured to judge whether to enter the refrigerant amount detection mode according to the detection time interval, the working state of the thermal management system of the automobile and the inclination degree of the automobile; a control module, configured to control the low pressure at the compressor inlet pipe in the thermal management system to reach the low pressure protection pressure when it is judged that the refrigerant amount detection mode is entered; A processing module, configured to generate corresponding reminder messages when it is determined that the liquid level position of the refrigerant in the condenser exceeds the position where the upper liquid level sensor is located or is lower than the position where the lower liquid level sensor is located, by using the upper liquid level sensor and the lower liquid level sensor provided on the condenser in the condensation system; The control module is specifically configured to: Close the first valve on the condenser outlet liquid pipe, and start the external fan and the compressor in the thermal management system, so that the refrigerant distributed in the thermal management system is compressed into the condenser, and the refrigerant in the condenser is condensed; Trigger the pressure sensor on the condenser gas pipe to collect and obtain the low-pressure in the condenser gas pipe, and when the low-pressure reaches the low-pressure protection pressure, close the external fan, the compressor and the second valve on the condenser inlet pipe.

6. The vehicle-based refrigerant quantity detection device according to claim 5, wherein, The judgment module is specifically configured to: When it is determined that the detection time interval is greater than or equal to a preset detection time interval, determine whether the working state of the thermal management system of the vehicle is in an idle state; When it is determined that the working state of the thermal management system of the vehicle is in an idle state, determine whether the inclination degree of the vehicle is less than or equal to a preset inclination rate; When it is determined that the inclination degree of the vehicle is less than or equal to the preset inclination rate, judge to enter the refrigerant quantity detection mode.

7. An electronic device, wherein, comprising: a processor, a memory, and a communication interface; The memory is used to store the executable instructions of the processor; wherein, the processor is configured to execute the vehicle-based refrigerant quantity detection method according to any one of claims 1 to 4 by executing the executable instructions.

8. A readable storage medium, on which a computer program is stored, wherein, the computer program, when executed by a processor, implements the vehicle-based refrigerant quantity detection method according to any one of claims 1 to 4.

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