Vehicle cabin ventilation control method and system

Abstract

The invention discloses a vehicle cabin ventilation control method and system. The method comprises the following steps: acquiring environmental parameter data in each vehicle, and further calculating a corresponding change rate; respectively calculating the corresponding shortest time t1 for completely updating the environment in the vehicle by using the full fresh air based on the parameter data of the environment in the vehicle, the corresponding change rate and the corresponding parameter data of the environment outside the vehicle; based on the parameter data of the environment in the vehicle, the corresponding change rate and the health, comfort and safety upper limit threshold value, the corresponding longest waiting time t2 for complete updating of the environment in the vehicle when the internal circulation is utilized is calculated, and the parameter data of the environment influence within the time of 2 delta t are predicted; and determining and executing a corresponding ventilation control strategy based on the environment influence parameter data, the maximum value t1max of the shortest time and the minimum value t2min of the longest waiting time. On the premise that the in-vehicle environment requirement is met, energy consumption is reduced, meanwhile, the operation efficiency and the management level of the ventilation system are improved, and the riding experience is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle ventilation control, and more specifically, relates to a vehicle cockpit ventilation control method and system. Background Art

[0002] The fresh air ratio in the mixed cycle of a vehicle air conditioner has a great impact on the system energy consumption. Currently, vehicle systems mainly adopt a fixed fresh air ratio scheme to maintain the temperature, humidity, and air quality inside the vehicle. During vehicle driving, due to changes in vehicle speed and ambient temperature, the operating efficiency of the air conditioning system will change. When the fresh air ratio remains constant, there are high-efficiency and low-efficiency regions in the operation of the air conditioning system, and the system energy consumption will increase significantly in the low-efficiency region. In view of this problem, the present invention adjusts the fresh air ratio in real time based on vehicle road conditions and environmental information, enabling the air conditioning system to perform rapid ventilation in the high-efficiency region and largely adopt the internal circulation to reduce ventilation in the low-efficiency region to reduce energy consumption.

[0003] The information disclosed in the background art part of the present invention is only intended to deepen the understanding of the general background art of the present invention, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0004] The object of the present invention is to propose a vehicle cockpit ventilation control method and system, which solves the problem of a significant increase in energy consumption in the low-efficiency region when the air conditioning system operates at a constant fresh air ratio, and realizes real-time adjustment of the fresh air ratio, enabling the air conditioning system to perform rapid ventilation in the high-efficiency region and largely adopt the internal circulation to reduce ventilation in the low-efficiency region to reduce energy consumption.

[0005] To achieve the above object, in a first aspect, the present invention proposes a vehicle cockpit ventilation control method, including:

[0006] Obtain data of each in-vehicle environment parameter, and then calculate the change rate corresponding to each in-vehicle environment parameter;

[0007] Based on each in-vehicle environment parameter data, the corresponding change rate, and the corresponding out-of-vehicle environment parameter data, calculate the shortest time t for completely updating the in-vehicle environment using all fresh air 1 ;

[0008] Based on each in-vehicle environment parameter data, the corresponding change rate, and the healthy, comfortable, and safe upper limit threshold, calculate the longest waiting time t for completely updating the in-vehicle environment when using the internal circulation 2 ;

[0009] Predict data of each environmental impact parameter within 2Δt time;

[0010] Based on each environmental impact parameter data, the maximum value t of the shortest time1max and the minimum value t of the longest waiting time 2min Determine and execute the corresponding ventilation control strategy.

[0011] Optionally, the data of each environmental impact parameter within the predicted 2Δt time includes:[[]]

[0012] Based on the map navigation information or vehicle speed, obtain the predicted vehicle speed data of the vehicle within 2Δt time in real-time;

[0013] Based on the weather forecast or weather prediction, obtain the data of the change in the outdoor environmental temperature within 2Δt time;

[0014] Based on the air quality monitoring, obtain the air quality data on the driving route within 2Δt time;

[0015] Among them, the first Δt is the execution time domain, and the second Δt is the prediction time domain.

[0016] Optionally, the ventilation control strategy includes:[[]]

[0017] The first ventilation control strategy: In the automatic mode of the cooling / heating mode, a part of fresh air is defaultly turned on inside the vehicle, and the proportion of fresh air introduced from outside the vehicle is a set value;

[0018] Compare the first average vehicle speed in the execution time domain with the second average vehicle speed in the prediction time domain;

[0019] If the first average vehicle speed is less than the second average vehicle speed, then when Δt ≤ t 2min at this time, control the vehicle to turn on the internal circulation within the execution time domain. When Δt > t 2min at this time, control the vehicle to keep the proportion of fresh air introduced from outside the vehicle unchanged or turn on the internal circulation within the execution time domain, so that each internal environment parameter reaches the corresponding healthy, comfortable and safe upper limit threshold after the execution time domain ends; after the vehicle speed increases, by increasing the proportion of fresh air introduced from outside the vehicle or turning on the full external circulation, so that each internal environment parameter decreases until it reaches the set value;

[0020] If the first average vehicle speed is equal to the second average vehicle speed, keep the proportion of fresh air introduced from outside the vehicle unchanged;

[0021] If the first average vehicle speed is greater than the second average vehicle speed, then when Δt ≤ t 1max at this time, control the vehicle to turn on the full external circulation within the execution time domain to quickly update the air inside the vehicle. When Δt > t 1max at this time, control the vehicle to keep the proportion of fresh air introduced from outside the vehicle unchanged or turn on the full external circulation within the execution time domain, so that each internal environment parameter reaches the corresponding healthy, comfortable and safe lower limit threshold after the execution time domain ends. After the vehicle speed decreases, by reducing the proportion of fresh air introduced from outside the vehicle or turning on the internal circulation, so that each internal environment parameter rises until it reaches the set value.

[0022] Optionally, the ventilation control strategy further includes:

[0023] The second ventilation control strategy: In the automatic mode of the refrigeration mode / heating mode, a part of fresh air is defaultly turned on in the vehicle, and the proportion of fresh air introduced from outside the vehicle is a set value;

[0024] Compare the first air quality in the execution time domain with the second air quality in the prediction time domain;

[0025] If the first air quality is less than the second air quality, then when Δt ≤ t 2min , control the vehicle to turn on the internal circulation in the execution time domain, and when Δt > t 2min , control the vehicle to keep the proportion of fresh air introduced from outside the vehicle unchanged or turn on the internal circulation in the execution time domain, so that each in-vehicle environment parameter reaches the corresponding health, comfort, and safety upper limit threshold after the execution time domain ends; after the air quality improves, by increasing the proportion of fresh air introduced from outside the vehicle or turning on the full external circulation, so that each in-vehicle environment parameter drops until it reaches the set value;

[0026] If the first air quality is equal to the second air quality, keep the proportion of fresh air introduced from outside the vehicle unchanged;

[0027] If the first air quality is greater than the second air quality, then when Δt ≤ t 1max , control the vehicle to turn on the full external circulation in the execution time domain to quickly update the in-vehicle air, and when Δt > t 1max , control the vehicle to keep the proportion of fresh air introduced from outside the vehicle unchanged or turn on the full external circulation in the execution time domain, so that each in-vehicle environment parameter reaches the corresponding health, comfort, and safety lower limit threshold after the execution time domain ends. After the air quality drops, by reducing the proportion of fresh air introduced from outside the vehicle or turning on the internal circulation, so that each in-vehicle environment parameter rises until it reaches the set value.

[0028] Optionally, the ventilation control strategy further includes:

[0029] The third ventilation control strategy: In the automatic mode of the refrigeration mode, a part of fresh air is defaultly turned on in the vehicle, and the proportion of fresh air introduced from outside the vehicle is a set value;

[0030] Compare the first outside vehicle environment temperature in the execution time domain with the second outside vehicle environment temperature in the prediction time domain;

[0031] If the first outside vehicle environment temperature is greater than the outside vehicle environment temperature, then when Δt ≤ t 2min , control the vehicle to turn on the internal circulation in the execution time domain, and when Δt > t 2minWhen the time comes, control the vehicle to keep the proportion of outdoor fresh air introduced unchanged or turn on the internal circulation during the execution time domain, so that each in-vehicle environmental parameter reaches the corresponding upper limit threshold of health, comfort and safety after the execution time domain ends; after the outdoor environmental temperature drops, increase the proportion of outdoor fresh air introduced or turn on the full outdoor circulation, so that each in-vehicle environmental parameter drops until it reaches the set value.

[0032] If the first outdoor environmental temperature is equal to the second outdoor environmental temperature, keep the proportion of outdoor fresh air introduced unchanged.

[0033] If the first outdoor environmental temperature is less than the second outdoor environmental temperature, then when Δt ≤ t 1max When the time comes, control the vehicle to turn on the full outdoor circulation during the execution time domain to quickly update the in-vehicle air. When Δt > t 1max When the time comes, control the vehicle to keep the proportion of outdoor fresh air introduced unchanged or turn on the full outdoor circulation during the execution time domain, so that each in-vehicle environmental parameter reaches the corresponding lower limit threshold of health, comfort and safety after the execution time domain ends. After the air quality drops, reduce the proportion of outdoor fresh air introduced or turn on the internal circulation, so that each in-vehicle environmental parameter rises until it reaches the set value.

[0034] Optionally, the ventilation control strategy further includes:

[0035] The fourth ventilation control strategy: In the automatic mode of the heating mode, part of the fresh air is defaultly turned on in the vehicle, and the proportion of outdoor fresh air introduced is the set value.

[0036] Compare the first outdoor environmental temperature in the execution time domain with the second outdoor environmental temperature in the prediction time domain.

[0037] If the first outdoor environmental temperature is less than the outdoor environmental temperature, then when Δt ≤ t 2min When the time comes, control the vehicle to turn on the internal circulation during the execution time domain. When Δt > t 2min When the time comes, control the vehicle to keep the proportion of outdoor fresh air introduced unchanged or turn on the internal circulation during the execution time domain, so that each in-vehicle environmental parameter reaches the corresponding upper limit threshold of health, comfort and safety after the execution time domain ends; after the outdoor environmental temperature drops, increase the proportion of outdoor fresh air introduced or turn on the full outdoor circulation, so that each in-vehicle environmental parameter drops until it reaches the set value.

[0038] If the first outdoor environmental temperature is equal to the second outdoor environmental temperature, keep the proportion of outdoor fresh air introduced unchanged.

[0039] If the first outdoor environmental temperature is greater than the second outdoor environmental temperature, then when Δt ≤ t 1max When the time comes, control the vehicle to turn on the full outdoor circulation during the execution time domain to quickly update the in-vehicle air. When Δt > t 1maxWhen the time is up, control the vehicle to keep the proportion of fresh air introduced from outside the vehicle unchanged or turn on the full outside circulation in the execution time domain, so that each in-vehicle environment parameter reaches the corresponding lower limit threshold of health, comfort and safety after the execution time domain ends. After the air quality drops, reduce the proportion of fresh air introduced from outside the vehicle or turn on the internal circulation to make each in-vehicle environment parameter rise to the set value.

[0040] Optionally, if there are conflicts among the first ventilation control strategy, the second ventilation control strategy, the third ventilation control strategy and the fourth ventilation control strategy, execute the control strategy with the lowest energy consumption.

[0041] Optionally, the in-vehicle environment parameters include:

[0042] Volatile organic compound content, humidity and carbon dioxide content;

[0043] The calculation expression of the change rate is:

[0044]

[0045] Where is the change rate corresponding to the in-vehicle environment parameter, y i-1 is the parameter value of the in-vehicle environment parameter detected last time, y i is the parameter value of the in-vehicle environment parameter detected currently, and t is the detection time interval.

[0046] Optionally, the calculation expression of the shortest time is:

[0047]

[0048] The calculation expression of the longest waiting time is:

[0049]

[0050] Where y 0 is the parameter value of the in-vehicle environment parameter corresponding to the outdoor fresh air, v 0 is the current air volume in the vehicle, V cabin is the total volume of the vehicle interior, y max is the upper limit threshold of the in-vehicle environment parameter considering health, safety and comfort, that is, the upper limit threshold of health, comfort and safety.

[0051] On the second aspect, the present invention proposes a vehicle cockpit ventilation control system, including:

[0052] An acquisition and calculation module, configured to acquire data of each in-vehicle environment parameter, and then calculate the change rate corresponding to each in-vehicle environment parameter;

[0053] The first calculation module is used to calculate the corresponding shortest time t for completely updating the vehicle interior environment with fresh air based on each of the vehicle interior environment parameter data, the corresponding change rate, and the corresponding vehicle exterior environment parameter data. 1 ;

[0054] The second calculation module is used to calculate the corresponding longest waiting time t for completely updating the vehicle interior environment during the use of the internal circulation based on each of the vehicle interior environment parameter data, the corresponding change rate, and the healthy, comfortable, and safe upper limit threshold. 2 ;

[0055] The prediction module is used to predict the data of each environmental impact parameter within 2Δt time.

[0056] The formulation and execution module is used to determine and execute the corresponding ventilation control strategy based on each of the environmental impact parameter data, the maximum value t of the shortest time 1max and the minimum value t of the longest waiting time. 2min Determine and execute the corresponding ventilation control strategy.

[0057] The beneficial effects of the present invention are as follows: By obtaining the vehicle interior environment parameter data and calculating the change rate, the present invention can accurately understand the dynamic changes of the vehicle interior environment state, provide an accurate data basis for subsequent ventilation control, and thus improve the monitoring and management capabilities of the vehicle interior environment; By calculating the shortest time for completely updating the vehicle interior environment with fresh air and the longest waiting time for completely updating the vehicle interior environment during the use of the internal circulation respectively, it helps to formulate a more scientific and reasonable ventilation strategy according to different environmental conditions and requirements, which can not only ensure the relative stability of the vehicle interior environment but also avoid unnecessary energy consumption; Calculating relevant times based on the vehicle interior environment parameter data, the change rate, and the healthy, comfortable, and safe upper limit threshold to ensure that the vehicle occupants are in a healthy, comfortable, and safe environment and improve the riding experience; Determining and executing the corresponding ventilation control strategy through the data of each environmental impact parameter, the minimum value of the shortest time, and the minimum value of the longest waiting time can reduce energy consumption on the premise of meeting the vehicle interior environment requirements, and at the same time can quickly and accurately make the optimal decision according to the actual situation of different vehicles and environmental changes, improving the operation efficiency and management level of the ventilation system.

[0058] The system of the present invention has other characteristics and advantages, which will be obvious from the accompanying drawings incorporated herein and the subsequent detailed description, or will be described in detail in the accompanying drawings incorporated herein and the subsequent detailed description, and these accompanying drawings and detailed description are used together to explain the specific principles of the present invention. Brief Description of the Drawings

[0059] The above and other objects, features, and advantages of the present invention will become more apparent by describing the exemplary embodiments of the present invention in more detail with reference to the accompanying drawings. In the exemplary embodiments of the present invention, the same reference numerals generally represent the same components.

[0060] Figure 1 The flowchart showing the steps of a vehicle cockpit ventilation control method according to Embodiment 1 of the present invention is presented.

[0061] Figure 2 The schematic diagram showing the execution time domain and the prediction time domain according to Embodiment 1 of the present invention is presented.

[0062] Figure 3 The flowchart showing the first ventilation control strategy according to Embodiment 1 of the present invention is presented.

[0063] Figure 4 The flowchart showing the second ventilation control strategy according to Embodiment 1 of the present invention is presented.

[0064] Figure 5 The flowchart showing the third ventilation control strategy according to Embodiment 1 of the present invention is presented.

[0065] Figure 6 The flowchart showing the fourth ventilation control strategy according to Embodiment 1 of the present invention is presented. Detailed Description of the Embodiment

[0066] The present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0067] Embodiment 1

[0068] As Figure 1 shown, this embodiment provides a vehicle cockpit ventilation control method, including:

[0069] S1. Obtain the data of each in-vehicle environment parameter, and then calculate the change rate corresponding to each in-vehicle environment parameter;

[0070] In this step, the in-vehicle environment parameters include: volatile organic compound content, humidity, and carbon dioxide content;

[0071] The calculation expression of the change rate corresponding to each in-vehicle environment parameter is:

[0072]

[0073] Wherein, is the change rate corresponding to the in-vehicle environment parameter, y i-1 is the parameter value of the in-vehicle environment parameter detected last time, y i is the parameter value of the in-vehicle environment parameter detected currently, and t is the detection time interval.

[0074] Specifically, the in-vehicle environment parameters concerned in this step cover multiple important indicators closely related to the health, safety and comfort of in-vehicle occupants, including the content of Volatile Organic Compounds (VOCs), humidity, carbon dioxide (CO2) content, etc.; in order to understand the dynamic changes of these in-vehicle environment parameters more deeply, it is necessary to calculate the change rates corresponding to each parameter. By calculating the change rates corresponding to each parameter, the change of each in-vehicle environment parameter over time can be clearly quantified. For example, if the calculated change rate of the VOC content is positive and the value is large, it indicates that the VOC content in the vehicle is rising rapidly, and ventilation and other measures may need to be taken in a timely manner to reduce its concentration; if the change rate of the CO2 content is negative, it indicates that the CO2 concentration in the vehicle is decreasing, which may be due to good ventilation and other reasons. In this way, through the calculation and analysis of the change rates of each in-vehicle environment parameter, the dynamic changes of the in-vehicle environment state can be accurately understood, providing important data support and decision-making basis for further optimizing the in-vehicle environment and formulating reasonable ventilation control strategies in the follow-up, so as to improve the monitoring and management capabilities of the in-vehicle environment.

[0075] S2. Calculate the shortest time t for completely updating the in-vehicle environment with fresh air based on the data of each in-vehicle environment parameter, the corresponding change rate, and the data of the corresponding out-of-vehicle environment parameter respectively 1 ;

[0076] In this step, the calculation expression of the shortest time is:

[0077]

[0078] Among them, Y 0 is the parameter value of the in-vehicle environment parameter corresponding to the outdoor fresh air, v 0 is the current air volume in the vehicle, V cabin is the total volume of the vehicle interior.

[0079] Specifically, in the process of optimizing the control of the in-vehicle environment, calculating the shortest time required to completely update the in-vehicle environment using fresh air is a crucial step. This step is based on various data, including in-vehicle environment parameter data, their corresponding change rates, and corresponding out-of-vehicle environment parameter data, and determines this shortest time through a specific calculation expression. Specifically, the in-vehicle environment parameter data we are concerned about covers important indicators such as volatile organic compound content, humidity, and carbon dioxide content. These parameters reflect the current in-vehicle environment state, and we have calculated their respective corresponding change rates through specific formulas. The change rate characterizes the changing trend of these parameters over time. At the same time, the corresponding out-of-vehicle environment parameter data also plays an important role in the calculation, providing us with relevant environmental information about the fresh air outside the vehicle. y 0 represents the parameter value of the corresponding in-vehicle environment parameter in the outdoor fresh air. Taking the volatile organic compound content as an example, y 0 is the content level of volatile organic compounds in the outdoor air; for humidity, y 0 is the humidity value of the outdoor air; for carbon dioxide content, y 0 is the concentration value of carbon dioxide in the outdoor air. This parameter reflects the initial state of the fresh air outside the vehicle and is an important reference standard when introducing fresh air to update the in-vehicle environment. v 0 represents the current in-vehicle air volume, that is, the volume flow rate of fresh air introduced into the vehicle per unit time. It determines the speed and amount of fresh air entering the vehicle and directly affects the rate of in-vehicle environment update. The larger the air volume, the faster the in-vehicle environment may be updated under the same other conditions. V cabin represents the total in-vehicle volume, that is, the size of the space inside the vehicle where air can exist. The total in-vehicle volume is a fixed physical parameter, which serves as the denominator in the calculation and affects the degree of change of in-vehicle environment parameters per unit time. A larger total in-vehicle volume means that more fresh air is needed to completely update the environment. y i is the parameter value of the currently detected in-vehicle environment parameter, such as the specific value of the currently detected in-vehicle volatile organic compound content, humidity, or carbon dioxide content. The upper limit of integration t 1 is the shortest time required to completely update the in-vehicle environment using fresh air that we need to solve. The meaning of this integral expression is that within the time period from time 0 to t 1 , integrate the change amount of the in-vehicle environment parameter per unit time divided by the total in-vehicle volume V cabin . When the integral result is equal to the difference between the current in-vehicle environment parameter and the corresponding parameter of the outdoor fresh air y i -y 0 , the time t 1That is the shortest time required to completely renew the in-vehicle environment. Through this calculation process, we can accurately determine the shortest time required to make the in-vehicle environment reach the same state as the outdoor fresh air (i.e., complete renewal) using fresh air based on information such as in-vehicle and out-of-vehicle environmental parameters and the current air volume, providing an important time basis for subsequent reasonable arrangement of the operation of the ventilation system and optimization of the in-vehicle environment.

[0080] S3. Calculate the longest waiting time t for the complete renewal of the in-vehicle environment using the internal circulation respectively based on each in-vehicle environmental parameter data, the corresponding change rate, and the upper limit threshold of health, comfort, and safety 2 ;

[0081] In this step, the calculation expression for the longest waiting time is:

[0082]

[0083] where y 0 is the parameter value of the in-vehicle environmental parameter corresponding to the outdoor fresh air, v 0 is the current air volume in the vehicle, V cabin is the total volume of the vehicle interior, y max is the upper limit threshold of the in-vehicle environmental parameter considering health, safety, and comfort, that is, the upper limit threshold of health, comfort, and safety.

[0084] Specifically, with the goal of ensuring the health, comfort, and safety of vehicle occupants, the control of the vehicle ventilation system needs to comprehensively consider various situations. Calculating the longest waiting time for the complete renewal of the in-vehicle environment in the recirculation mode is one of the important steps. The health, comfort, and safety upper limit threshold is a critical value set for each in-vehicle environment parameter from the comprehensive perspectives of health, safety, and comfort. It is the upper limit of the concentration or mass fraction of the in-vehicle environment parameter that vehicle occupants can tolerate. For different in-vehicle environment parameters, this upper limit threshold may vary; when the actual value of the in-vehicle environment parameter exceeds this upper limit threshold, it may endanger human health or affect driving safety, and this value can be defined during the vehicle design stage. For example, for the content of volatile organic compounds, too high a concentration may cause harm to human health, so an upper limit threshold is set. When the content of volatile organic compounds in the vehicle reaches this threshold, measures need to be taken to improve the in-vehicle environment; for humidity, too high or too low humidity will affect the riding comfort, and accordingly, there is also a suitable upper limit threshold; for carbon dioxide content, when it exceeds a certain concentration, it will make people feel uncomfortable, so there is also an upper limit threshold based on health, comfort, and safety considerations. By calculating the longest waiting time for the complete renewal of the in-vehicle environment when using the recirculation mode, we can accurately determine the longest time that the in-vehicle environment can be maintained within an acceptable range based on the current situation and changing trend of the in-vehicle environment, as well as the requirements of health, comfort, and safety, providing an important time reference basis for reasonably arranging the switching of ventilation modes and ensuring the health, comfort, and safety of vehicle occupants.

[0085] S4. Predict the data of each environmental impact parameter within 2Δt time;

[0086] In this step, the data of each environmental impact parameter predicted within 2Δt time includes:

[0087] Based on the map navigation information or vehicle speed, predict and obtain the predicted vehicle speed data within 2Δt time in real time;

[0088] Based on the weather forecast or weather prediction, obtain the data of the change in the outdoor environment temperature within 2Δt time;

[0089] Based on the air quality monitoring, obtain the air quality data on the driving route within 2Δt time;

[0090] Among them, the first Δt is the execution time domain, and the second Δt is the prediction time domain.

[0091] Specifically, the environmental impact parameter data of this embodiment includes predicted vehicle speed data, vehicle exterior environmental temperature change data, and air quality data; in the process of comprehensively managing and regulating the vehicle interior environment, predicting the environmental impact parameter data within a certain period of time in the future is a crucial step, which helps to formulate reasonable ventilation control strategies in advance to ensure the health, comfort, and safety of the vehicle occupants; map navigation information is an important data source. Modern map navigation systems usually combine real-time traffic conditions, including road congestion, accident locations, etc. By analyzing and processing this information, the map navigation system can predict the speed of the vehicle on different road sections within the next 2Δt time. For example, when the navigation system detects severe congestion ahead, it will predict that the vehicle's speed on this section will decrease significantly or even come to a standstill. This vehicle speed prediction based on map navigation information can provide important basic data for subsequent environmental impact analysis because the change in vehicle speed will affect the vehicle's ventilation and the interaction between the vehicle interior and exterior environments. Real-time vehicle speed prediction is to monitor the current vehicle speed in real time through the vehicle's own sensor system, such as a vehicle speed sensor, and combine factors such as the vehicle's driving state and driving mode, and use advanced algorithms to predict the vehicle speed change within the next 2Δt time. For example, when the vehicle is accelerating or decelerating, the real-time vehicle speed prediction system will calculate the vehicle speed within a certain period in the future based on the current acceleration and time interval. This real-time prediction can more accurately reflect the dynamic changes of the vehicle itself and provide more accurate vehicle speed data support for vehicle interior environment management. When obtaining the vehicle exterior environmental temperature change data, weather forecasts can provide a more macroscopic temperature change trend. For example, if the forecast shows that a cold air mass will pass through the vehicle's driving area within the next 2Δt time, it can be predicted that the vehicle exterior environmental temperature will gradually decrease. This macroscopic temperature change information is of great guiding significance for the regulation of the vehicle interior air conditioning system and the formulation of ventilation strategies because the change in temperature will directly affect the comfort of the vehicle occupants and the stability of the vehicle interior environment. Weather prediction focuses more on using real-time meteorological monitoring data and advanced numerical models to make more accurate short-term predictions of weather changes. Through the real-time monitoring of the vehicle exterior environmental temperature and a dynamically updated prediction model, more accurate vehicle exterior environmental temperature change data within 2Δt time can be obtained. For example, by using satellite remote sensing technology and real-time monitoring data from ground meteorological stations, combined with a high-resolution numerical weather forecast model, the specific change value of the vehicle exterior environmental temperature within a specific time period can be predicted, providing more accurate temperature reference for vehicle interior environment management. Air quality monitoring is to monitor the concentration of various pollutants in the air in real time through air quality monitoring stations distributed in different areas. These monitoring stations will detect various air quality indicators, including particulate matter (such as PM2.5, PM10), harmful gases (such as sulfur dioxide, nitrogen oxides, carbon monoxide, etc.).When obtaining the air quality data on the driving path within 2Δt, the driving route of the vehicle is combined, and the data of each monitoring station along the way are integrated and analyzed. For example, if the vehicle will pass through an industrial area within the next 2Δt, and the air quality monitoring station near the industrial area shows that the pollutant concentration in the current air is relatively high, then it can be predicted that the air quality outside the vehicle will be poor when the vehicle passes through this area. Such prediction data based on air quality monitoring is crucial for determining the ventilation mode of the vehicle (such as using full external circulation or internal circulation), which can effectively prevent the vehicle occupants from being exposed to severely polluted air and ensure the air quality inside the vehicle. Figure 2 As shown, the 2Δt time here is divided into two parts. The first Δt is the execution time domain, which means that within this time period, the ventilation control system of the vehicle can actually execute the corresponding ventilation control strategy according to the obtained and predicted data; the second Δt is the prediction time domain, which is mainly used for further prediction and analysis of the future environmental impact parameter data, providing more sufficient preparation and decision-making basis for the subsequent execution time domain. Through the accurate prediction and comprehensive analysis of the environmental impact parameter data in these three aspects, the environmental conditions of the vehicle within the next 2Δt can be more comprehensively understood, thereby achieving precise regulation of the vehicle interior environment.

[0092] S5. Based on each environmental impact parameter data, the maximum value t of the shortest time 1max and the minimum value t of the longest waiting time 2min Determine and execute the corresponding ventilation control strategy.

[0093] In this step, determining and executing the corresponding ventilation control strategy based on each environmental impact parameter data, the minimum value of the shortest time, and the minimum value of the longest waiting time includes:

[0094] The first ventilation control strategy: In the automatic mode of the refrigeration / heating mode, a part of fresh air is defaultly turned on inside the vehicle, and the proportion of fresh air introduced from outside the vehicle is the set value;

[0095] Compare the first average vehicle speed in the execution time domain with the second average vehicle speed in the prediction time domain;

[0096] If the first average vehicle speed is less than the second average vehicle speed, then when Δt ≤ t 2min , control the vehicle to turn on the internal circulation in the execution time domain. When Δt > t 2min , control the vehicle to keep the proportion of fresh air introduced from outside the vehicle unchanged or turn on the internal circulation in the execution time domain, so that each interior environment parameter reaches the corresponding healthy, comfortable, and safe upper limit threshold after the execution time domain ends; after the vehicle speed increases, by increasing the proportion of fresh air introduced from outside the vehicle or turning on the full external circulation, each interior environment parameter drops until it reaches the set value;

[0097] If the first average vehicle speed is equal to the second average vehicle speed, the proportion of fresh air introduced from outside the vehicle is kept unchanged;

[0098] If the first average vehicle speed is greater than the second average vehicle speed, then when Δt ≤ t 1max , control the vehicle to turn on the full outside circulation during the execution time domain to quickly update the air inside the vehicle. When Δt > t 1max , control the vehicle to keep the proportion of fresh air introduced from outside the vehicle unchanged or turn on the full outside circulation during the execution time domain, so that each in-vehicle environment parameter reaches the corresponding lower limit threshold of health, comfort, and safety after the execution time domain. After the vehicle speed drops, reduce the proportion of fresh air introduced from outside the vehicle or turn on the inside circulation to increase each in-vehicle environment parameter until it reaches the set value.

[0099] Second ventilation control strategy: In the automatic mode of the refrigeration / heating mode, a part of fresh air is defaultly turned on inside the vehicle, and the proportion of fresh air introduced from outside the vehicle is the set value;

[0100] Compare the first air quality in the execution time domain with the second air quality in the prediction time domain;

[0101] If the first air quality is less than the second air quality, then when Δt ≤ t 2min , control the vehicle to turn on the inside circulation during the execution time domain. When Δt > t 2min , control the vehicle to keep the proportion of fresh air introduced from outside the vehicle unchanged or turn on the inside circulation during the execution time domain, so that each in-vehicle environment parameter reaches the corresponding upper limit threshold of health, comfort, and safety after the execution time domain; After the air quality improves, increase the proportion of fresh air introduced from outside the vehicle or turn on the full outside circulation to reduce each in-vehicle environment parameter until it reaches the set value;

[0102] If the first air quality is equal to the second air quality, keep the proportion of fresh air introduced from outside the vehicle unchanged;

[0103] If the first air quality is greater than the second air quality, then when Δt ≤ t 1max , control the vehicle to turn on the full outside circulation during the execution time domain to quickly update the air inside the vehicle. When Δt > t 1max , control the vehicle to keep the proportion of fresh air introduced from outside the vehicle unchanged or turn on the full outside circulation during the execution time domain, so that each in-vehicle environment parameter reaches the corresponding lower limit threshold of health, comfort, and safety after the execution time domain. After the air quality drops, reduce the proportion of fresh air introduced from outside the vehicle or turn on the inside circulation to increase each in-vehicle environment parameter until it reaches the set value.

[0104] Third ventilation control strategy: In the automatic mode of the refrigeration mode, a part of fresh air is defaultly turned on inside the vehicle, and the proportion of fresh air introduced from outside the vehicle is the set value

[0105] Compare the first outside vehicle environment temperature in the execution time domain with the second outside vehicle environment temperature in the prediction time domain;

[0106] If the first outside vehicle environment temperature is greater than the outside vehicle environment temperature, then when Δt ≤ t 2min , control the vehicle to turn on the internal circulation during the execution time domain. When Δt > t 2min , control the vehicle to keep the proportion of outside fresh air introduced unchanged or turn on the internal circulation during the execution time domain, so that each in-vehicle environment parameter reaches the corresponding upper limit threshold of health, comfort and safety after the execution time domain ends; after the outside vehicle environment temperature drops, increase the proportion of outside fresh air introduced or turn on the full outside circulation, so that each in-vehicle environment parameter drops until it reaches the set value;

[0107] If the first outside vehicle environment temperature is equal to the second outside vehicle environment temperature, keep the proportion of outside fresh air introduced unchanged;

[0108] If the first outside vehicle environment temperature is less than the second outside vehicle environment temperature, then when Δt ≤ t 1max , control the vehicle to turn on the full outside circulation during the execution time domain to quickly update the in-vehicle air. When Δt > t 1max , control the vehicle to keep the proportion of outside fresh air introduced unchanged or turn on the full outside circulation during the execution time domain, so that each in-vehicle environment parameter reaches the corresponding lower limit threshold of health, comfort and safety after the execution time domain ends. After the air quality drops, reduce the proportion of outside fresh air introduced or turn on the internal circulation, so that each in-vehicle environment parameter rises until it reaches the set value.

[0109] Fourth ventilation control strategy: In the automatic mode of the heating mode, part of the fresh air is defaultly turned on inside the vehicle, and the proportion of outside fresh air introduced is the set value

[0110] Compare the first outside vehicle environment temperature in the execution time domain and the second outside vehicle environment temperature in the prediction time domain;

[0111] If the first outside vehicle environment temperature is less than the outside vehicle environment temperature, then when Δt ≤ t 2min , control the vehicle to turn on the internal circulation during the execution time domain. When Δt > t 2min , control the vehicle to keep the proportion of outside fresh air introduced unchanged or turn on the internal circulation during the execution time domain, so that each in-vehicle environment parameter reaches the corresponding upper limit threshold of health, comfort and safety after the execution time domain ends; after the outside vehicle environment temperature drops, increase the proportion of outside fresh air introduced or turn on the full outside circulation, so that each in-vehicle environment parameter drops until it reaches the set value;

[0112] If the first outside vehicle environment temperature is equal to the second outside vehicle environment temperature, keep the proportion of outside fresh air introduced unchanged;

[0113] If the first outside vehicle environment temperature is greater than the second outside vehicle environment temperature, then when Δt ≤ t 1max , control the vehicle to turn on the full outside circulation during the execution time domain to quickly update the in-vehicle air. When Δt > t 1maxWhen the vehicle is in operation, control the vehicle to keep the proportion of fresh air introduced from outside the vehicle unchanged or turn on the full fresh air circulation in the execution time domain, so that after the execution time domain ends, each in-vehicle environmental parameter reaches the corresponding lower limit threshold of healthy, comfortable and safe. After the air quality deteriorates, reduce the proportion of fresh air introduced from outside the vehicle or turn on the internal circulation to increase each in-vehicle environmental parameter until it reaches the set value.

[0114] If there are conflicts among the first ventilation control strategy, the second ventilation control strategy, the third ventilation control strategy and the fourth ventilation control strategy, execute the control strategy with the lowest energy consumption.

[0115] Specifically, during the operation of the vehicle, to create a healthy, comfortable and safe in-vehicle environment while taking into account the effective control of energy consumption, this embodiment determines and executes the corresponding ventilation control strategy according to each environmental impact parameter data, the minimum value of the shortest time and the minimum value of the longest waiting time. There are a total of 4 ventilation control strategies, which comprehensively consider factors such as vehicle speed, air quality, and outside vehicle environmental temperature. By adjusting the proportion of fresh air introduced from outside the vehicle and switching between the internal circulation and the external circulation modes, the in-vehicle environmental parameters are maintained within the range of healthy, comfortable and safe, and the energy consumption is reduced as much as possible. Fresh air ratio: The vehicle air conditioning system usually sends the mixed air after mixing the in-vehicle return air and the fresh air from outside the vehicle into the passenger compartment to ensure the in-vehicle air quality and reduce the system energy consumption. The proportion of fresh air from outside the vehicle in the mixed air is called the fresh air ratio. Internal circulation: The in-vehicle air conditioning system does not introduce any fresh air and only relies on the in-vehicle air for continuous circulation. The energy consumption is relatively low, but it cannot guarantee the in-vehicle air quality, humidity, etc. Full fresh air circulation: The in-vehicle air conditioning system introduces all fresh air, which can maintain better in-vehicle air quality but has higher energy consumption. Among these 4 ventilation control strategies, the initial state of the ventilation system is: in the automatic mode of the cooling mode or the heating mode, a part of fresh air is defaultly turned on in the vehicle, and the proportion of fresh air introduced from outside the vehicle is set to a base value; this setting ensures that the in-vehicle air can maintain a certain degree of circulation and update in the initial stage, laying a foundation for precise regulation according to the actual situation.

[0116] The first ventilation control strategy: In the automatic mode of the cooling mode or the heating mode, ventilation control based on vehicle speed. As Figure 3 shown, calculate and compare the first average vehicle speed in the execution time domain and the second average vehicle speed in the prediction time domain; if the first average vehicle speed is less than the second average vehicle speed, it means that the vehicle speed has a tendency to increase. At this time, further make a decision according to the minimum value t 2min of the longest waiting time. When Δt ≤ t 2min , in order to prevent the in-vehicle environmental parameters from exceeding the upper limit threshold of healthy, comfortable and safe before the vehicle speed increases (because the ventilation effect is relatively poor when the vehicle speed is slow, and the in-vehicle environmental parameters may reach the upper limit relatively quickly), control the vehicle to turn on the internal circulation in the execution time domain to avoid the entry of outside air and maintain the existing in-vehicle environment. When Δt > t 2minWhen this happens, there are two options. One is to control the vehicle to keep the proportion of fresh outdoor air introduced unchanged during the execution time domain, and the other is to turn on the internal circulation, aiming to make each in-vehicle environment parameter reach the corresponding upper limit threshold of health, comfort, and safety after the execution time domain ends. When the vehicle speed increases, since the ventilation effect will improve, at this time, by increasing the proportion of fresh outdoor air introduced or turning on the full outdoor circulation, the update speed of the in-vehicle air is accelerated, so that each in-vehicle environment parameter decreases until it reaches the set value, improving the in-vehicle comfort. If the first average vehicle speed is equal to the second average vehicle speed, it means that the vehicle speed remains stable. At this time, keep the proportion of fresh outdoor air introduced unchanged and maintain the current ventilation state. If the first average vehicle speed is greater than the second average vehicle speed, it means that the vehicle speed has a downward trend. Similarly, make a decision according to the maximum value t of the shortest time 1max to decide; when Δt ≤ t 1max , control the vehicle to turn on the full outdoor circulation during the execution time domain, and utilize the ventilation advantage when the vehicle speed is relatively fast to quickly update the in-vehicle air and reduce the in-vehicle environment parameters to an appropriate range. When Δt > t 1max , control the vehicle to keep the proportion of fresh outdoor air introduced unchanged or turn on the full outdoor circulation during the execution time domain to ensure that each in-vehicle environment parameter reaches the corresponding lower limit threshold of health, comfort, and safety after the execution time domain ends. After the vehicle speed drops, in order to prevent the deterioration of the in-vehicle environment parameters, by reducing the proportion of fresh outdoor air introduced or turning on the internal circulation, each in-vehicle environment parameter rises until it reaches the set value; the lower limit threshold of health, comfort, and safety is the lower limit that the in-vehicle environment parameters can reach. Without additional adsorption or treatment equipment, this value is usually the same as the current external environment parameters; the set value of each in-vehicle environment parameter is the default in-vehicle environment parameter value, which is any value between the upper limit threshold and the lower limit threshold, and this value can be defined during the vehicle design stage.

[0117] The second ventilation control strategy: In the automatic mode of the refrigeration mode or the heating mode, for ventilation control based on air quality, as Figure 4 shown, calculate and compare the first air quality in the execution time domain and the second air quality in the prediction time domain. If the first air quality is less than the second air quality, it indicates that the air quality has a tendency to improve. At this time, make a decision according to the minimum value t of the longest waiting time 2min to decide. When Δt ≤ t 2min , to avoid the entry of air with poor outdoor air quality into the vehicle and affecting the in-vehicle environment, control the vehicle to turn on the internal circulation during the execution time domain; when Δt > t 2minWhen it is possible, one can choose to keep the proportion of fresh outside air introduced unchanged or turn on the recirculation to ensure that after the execution time domain ends, each in-vehicle environmental parameter reaches the corresponding upper limit threshold of health, comfort, and safety; when the air quality improves, increase the proportion of fresh outside air introduced or turn on the full outside air circulation to more fully update the in-vehicle air until the set environmental parameter values are reached. If the first air quality is equal to the second air quality, it indicates that the air quality is stable, and the proportion of fresh outside air introduced remains unchanged. If the first air quality is greater than the second air quality, that is, the air quality has a downward trend, then make a decision based on the maximum value t of the shortest time 1max to decide that when Δt ≤ t 1max , turn on the full outside air circulation to quickly update the in-vehicle air before the air quality deteriorates; when Δt > t 1max , keep the proportion of fresh outside air introduced unchanged or turn on the full outside air circulation to make each in-vehicle environmental parameter reach the corresponding lower limit threshold of health, comfort, and safety after the execution time domain ends. After the air quality drops, reduce the proportion of fresh outside air introduced or turn on the recirculation to bring the in-vehicle environmental parameters back to the set values.

[0118] The third ventilation control strategy: In the automatic mode of the refrigeration mode, ventilation control based on the outside vehicle environment temperature, as Figure 5 shown, compare the first outside vehicle environment temperature in the execution time domain and the second outside vehicle environment temperature in the prediction time domain. If the first outside vehicle environment temperature is greater than the second outside vehicle environment temperature, that is, the outside vehicle temperature has a downward trend, at this time make a decision based on the minimum value t of the longest waiting time 2min to decide that when Δt ≤ t 2min , turn on the recirculation to prevent high-temperature outside air from entering and affecting the in-vehicle refrigeration effect and environmental parameters; when Δt > t 2min , keep the proportion of fresh outside air introduced unchanged or turn on the recirculation to make each in-vehicle environmental parameter reach the corresponding upper limit threshold of health, comfort, and safety after the execution time domain ends. After the outside vehicle environment temperature drops, increase the proportion of fresh outside air introduced or turn on the full outside air circulation to use the low-temperature outside air to improve the in-vehicle environment and make each in-vehicle environmental parameter drop until the set values are reached. If the first outside vehicle environment temperature is equal to the second outside vehicle environment temperature, keep the proportion of fresh outside air introduced unchanged and maintain the current ventilation state. If the first outside vehicle environment temperature is less than the second outside vehicle environment temperature, the outside vehicle temperature has an upward trend, at this time make a decision based on the maximum value t of the shortest time 1max to decide that when Δt ≤ t 1max , turn on the full outside air circulation to quickly update the in-vehicle air and utilize the relatively low current outside vehicle temperature. When Δt > t 1max , keep the proportion of fresh outside air introduced unchanged or turn on the full outside air circulation to make each in-vehicle environmental parameter reach the corresponding lower limit threshold of health, comfort, and safety after the execution time domain ends. After the outside vehicle environment temperature rises, reduce the proportion of fresh outside air introduced or turn on the recirculation to make each in-vehicle environmental parameter rise until the set values are reached.

[0119] Fourth ventilation control strategy: In the automatic mode of the heating mode, ventilation control based on the outside vehicle environment temperature, such as Figure 6 shown, compare the first outside vehicle environment temperature in the execution time domain with the second outside vehicle environment temperature in the prediction time domain. If the first outside vehicle environment temperature is less than the second outside vehicle environment temperature, it indicates that the outside vehicle temperature has an upward trend. At this time, make a decision according to the minimum value t of the longest waiting time 2min . When Δt ≤ t 2min , turn on the internal circulation to prevent the entry of low-temperature outside air and affect the heating effect and environmental parameters inside the vehicle; when Δt > t 2min , keep the proportion of fresh outside air introduced unchanged or turn on the internal circulation to make each internal vehicle environment parameter reach the corresponding healthy, comfortable and safe upper limit threshold after the execution time domain ends. After the outside vehicle environment temperature rises, increase the proportion of fresh outside air introduced or turn on the full outside circulation, and optimize the internal vehicle environment with the high-temperature outside air to make each internal vehicle environment parameter drop until it reaches the set value. If the first outside vehicle environment temperature is equal to the second outside vehicle environment temperature, keep the proportion of fresh outside air introduced unchanged and maintain the current ventilation state. If the first outside vehicle environment temperature is greater than the second outside vehicle environment temperature, it indicates that the outside vehicle temperature has a downward trend. At this time, make a decision according to the maximum value t of the shortest time 1max . When Δt ≤ t 1max , turn on the full outside circulation to update the air inside the vehicle with the current relatively high outside vehicle temperature. When Δt > t 1max , keep the proportion of fresh outside air introduced unchanged or turn on the full outside circulation to make each internal vehicle environment parameter reach the corresponding healthy, comfortable and safe lower limit threshold after the execution time domain ends. After the outside vehicle environment temperature drops, reduce the proportion of fresh outside air introduced or turn on the internal circulation to make each internal vehicle environment parameter rise until it reaches the set value.

[0120] When the vehicle is in the automatic mode of the heating mode, the first ventilation control strategy, the second ventilation control strategy, and the fourth ventilation control strategy can be selected; when the vehicle is in the automatic mode of the cooling mode, the first ventilation control strategy, the second ventilation control strategy, and the third ventilation control strategy can be selected; when there are conflicts among multiple ventilation control strategies formulated based on vehicle speed, air quality, and outdoor ambient temperature, to avoid increased energy consumption caused by unreasonable ventilation control, the system will execute the control strategy with the lowest energy consumption, so as to minimize the energy consumption of the vehicle air conditioning system while ensuring a healthy, comfortable, and safe in-vehicle environment, and achieve a balance between the economy and comfort of vehicle operation. Determining the ventilation control strategy with the lowest energy consumption requires comprehensive consideration of factors such as ventilation mode energy consumption, the relationship between vehicle speed and energy consumption, the relationship between air quality and energy consumption, and the relationship between outdoor ambient temperature and energy consumption. For example, the energy consumption of internal circulation, external circulation, and the introduction of fresh air at different ratios is different. Generally speaking, in the case of full external circulation, the air conditioning system needs to process more outdoor air, and the energy consumption is relatively high; while in the case of internal circulation, the air conditioning system only needs to process the air already in the vehicle, and the energy consumption is relatively low, and the energy consumption of some fresh air modes is between the two, and the specific energy consumption depends on the ratio of fresh air introduction. By establishing an energy consumption model, conducting experiments and data collection, and real-time monitoring and feedback, etc., the energy consumption of the air conditioning system under different ventilation control strategies and different environmental parameter conditions can be calculated.

[0121] By repeatedly executing S1 - S5 in this embodiment, the ventilation mode and the fresh air introduction ratio can be flexibly adjusted according to different environmental impact parameter data, effectively ensuring the health, comfort, and safety of the in-vehicle environment, while taking into account energy consumption control.

[0122] Embodiment 2

[0123] This embodiment provides a vehicle cockpit ventilation control system, including:

[0124] An acquisition and calculation module, configured to acquire various in-vehicle environment parameter data, and then calculate the change rate corresponding to each in-vehicle environment parameter;

[0125] A first calculation module, configured to calculate the shortest time t for completely updating the in-vehicle environment with fresh air corresponding to each based on the various in-vehicle environment parameter data, the corresponding change rate, and the corresponding outdoor environment parameter data 1 ;

[0126] A second calculation module, configured to calculate the longest waiting time t for completely updating the in-vehicle environment during internal circulation corresponding to each based on the various in-vehicle environment parameter data, the corresponding change rate, and the health, comfort, and safety upper limit threshold 2 ;

[0127] A prediction module, configured to predict various environmental impact parameter data within 2Δt time;

[0128] A formulation and execution module, configured to determine and execute corresponding ventilation control strategies based on various environmental impact parameter data, the maximum value t of the shortest time 1max and the minimum value t of the longest waiting time 2min

[0129] The above has described various embodiments of the present invention. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.​

Claims

1. A vehicle cabin ventilation control method, characterized in that: include: Acquire each in-vehicle environmental parameter data, and then calculate the change rate corresponding to each in-vehicle environmental parameter; Based on each of the in-vehicle environment parameter data, the corresponding change rate and the corresponding out-vehicle environment parameter data, respectively calculate the corresponding shortest time t1 for completely refreshing the in-vehicle environment by using fresh air; Based on each of the in-vehicle environment parameter data, the corresponding change rate and the upper limit threshold of health, comfort and safety, respectively calculate the corresponding maximum waiting time t2 for the in-vehicle environment to be completely updated when using the internal circulation; Predict the environmental impact parameter data within 2Δt time; Based on the environmental impact parameter data, the maximum value of the shortest time t 1max and the minimum value of the longest waiting time t 2min Determine and implement appropriate ventilation control strategies.

2. The vehicle cabin ventilation control method according to claim 1, characterized in that: The environmental impact parameter data predicted within 2Δt time include: Obtain the predicted vehicle speed data within 2Δt based on map navigation information or real-time vehicle speed prediction; Based on the weather forecast or weather prediction, obtain the temperature change data of the external environment within 2Δt; Based on air quality monitoring, the air quality data on the driving route within 2Δt is obtained; Among them, the first section Δt is the execution time domain, and the second section Δt is the prediction time domain.

3. The vehicle cabin ventilation control method according to claim 2, characterized in that: The ventilation control strategies include: First ventilation control strategy: In the automatic mode of cooling mode / heating mode, some fresh air is turned on in the car by default, and the proportion of fresh air introduced from outside is the set value; comparing the first average vehicle speed in the execution time domain with the second average vehicle speed in the prediction time domain; If the first average speed is less than the second average speed, then when Δt≤t 2min When Δt>t 2min When the vehicle is in a state of slow speed, the vehicle is controlled to keep the proportion of fresh air introduced from outside unchanged or to start the internal circulation during the execution time domain, so that each in-vehicle environmental parameter reaches the corresponding upper threshold of health, comfort and safety after the execution time domain ends; after the vehicle speed increases, the proportion of fresh air introduced from outside is increased or the full external circulation is started, so that each in-vehicle environmental parameter decreases until it reaches the set value; If the first average vehicle speed is equal to the second average vehicle speed, the proportion of fresh air introduced from outside the vehicle is kept unchanged; If the first average speed is greater than the second average speed, then when Δt≤t 1max When Δt>t 1max During the execution time domain, the vehicle is controlled to maintain the proportion of fresh air introduced from outside unchanged or to start the full external circulation, so that after the execution time domain ends, the various in-vehicle environmental parameters reach the corresponding health, comfort and safety lower limit thresholds. After the vehicle speed drops, the proportion of fresh air introduced from outside is reduced or the internal circulation is started, so that the various in-vehicle environmental parameters rise until they reach the set values.

4. The vehicle cabin ventilation control method according to claim 3, characterized in that: The ventilation control strategy also includes: Second ventilation control strategy: In the automatic mode of cooling mode / heating mode, some fresh air is turned on in the car by default, and the proportion of fresh air introduced from outside the car is the set value; comparing the first air quality in the execution time domain with the second air quality in the prediction time domain; If the first air mass is less than the second air mass, then when Δt≤t 2min When Δt>t 2min When the vehicle is controlled to keep the proportion of fresh air introduced from outside unchanged or to start the internal circulation during the execution time domain, so that each in-vehicle environmental parameter reaches the corresponding upper threshold of health, comfort and safety after the execution time domain ends; after the air quality improves, the proportion of fresh air introduced from outside is increased or the full external circulation is started, so that each in-vehicle environmental parameter decreases until it reaches the set value; If the first air quality is equal to the second air quality, the proportion of fresh air introduced from outside the vehicle is kept unchanged; If the first air mass is greater than the second air mass, then when Δt≤t 1max When Δt>t 1max When the air quality drops, the proportion of fresh air introduced from outside is reduced or the internal circulation is turned on to increase the environmental parameters in the vehicle until they reach the set value.

5. The vehicle cabin ventilation control method according to claim 4, characterized in that: The ventilation control strategy also includes: The third ventilation control strategy: In the automatic mode of the cooling mode, some fresh air is turned on in the car by default, and the proportion of fresh air introduced from outside the car is the set value; comparing a first vehicle exterior environment temperature in the execution time domain with a second vehicle exterior environment temperature in the prediction time domain; If the first vehicle exterior environment temperature is greater than the vehicle exterior environment temperature, then when Δt≤t 2min When Δt>t 2min When the vehicle is controlled to keep the proportion of fresh air introduced from outside unchanged or to start the internal circulation during the execution time domain, so that each in-vehicle environmental parameter reaches the corresponding upper threshold of health, comfort and safety after the execution time domain ends; after the outside ambient temperature drops, the proportion of fresh air introduced from outside is increased or the full external circulation is started, so that each in-vehicle environmental parameter drops until it reaches the set value; If the first vehicle exterior environment temperature is equal to the second vehicle exterior environment temperature, the proportion of fresh air introduced from outside the vehicle is kept unchanged; If the first vehicle exterior environment temperature is lower than the second vehicle exterior environment temperature, then when Δt≤t 1max When Δt>t 1max During the execution time domain, the vehicle is controlled to maintain the proportion of fresh air introduced from outside unchanged or to start the full external circulation, so that after the execution time domain ends, the various in-vehicle environmental parameters reach the corresponding health, comfort and safety lower limit thresholds. After the outside ambient temperature rises, the proportion of fresh air introduced from outside is reduced or the internal circulation is started, so that the various in-vehicle environmental parameters rise until they reach the set values.

6. The vehicle cabin ventilation control method according to claim 5, characterized in that: The ventilation control strategy also includes: Fourth ventilation control strategy: In the automatic mode of heating mode, some fresh air is turned on in the car by default, and the proportion of fresh air introduced from outside the car is the set value; comparing a first vehicle exterior environment temperature in the execution time domain with a second vehicle exterior environment temperature in the prediction time domain; If the first vehicle exterior environment temperature is lower than the vehicle exterior environment temperature, then when Δt≤t 2min When Δt>t 2min When the vehicle is controlled to keep the proportion of fresh air introduced from outside unchanged or to start the internal circulation during the execution time domain, so that each in-vehicle environmental parameter reaches the corresponding upper threshold of health, comfort and safety after the execution time domain ends; after the outside ambient temperature drops, the proportion of fresh air introduced from outside is increased or the full external circulation is started, so that each in-vehicle environmental parameter drops until it reaches the set value; If the first vehicle exterior environment temperature is equal to the second vehicle exterior environment temperature, the proportion of fresh air introduced from outside the vehicle is kept unchanged; If the first vehicle exterior environment temperature is greater than the second vehicle exterior environment temperature, then when Δt≤t 1max When Δt>t 1max When the air quality drops, the proportion of fresh air introduced from outside is reduced or the internal circulation is turned on to increase the environmental parameters in the vehicle until they reach the set value.

7. The vehicle cabin ventilation control method according to claim 6, characterized in that: If there is a conflict among the first ventilation control strategy, the second ventilation control strategy, the third ventilation control strategy and the fourth ventilation control strategy, the control strategy with the lowest energy consumption is executed.

8. The vehicle cabin ventilation control method according to claim 1, characterized in that: The in-vehicle environment parameters include: Volatile organic compound content, humidity and carbon dioxide content; The calculation expression of the change rate is: in, is the change rate of the in-vehicle environmental parameters, y i-1 is the parameter value of the vehicle interior environment parameter detected last time, y i is the parameter value of the currently detected in-vehicle environment parameter, and t is the detection time interval.

9. The vehicle cabin ventilation control method according to claim 1, characterized in that: The calculation expression of the shortest time is: The calculation expression of the longest waiting time is: Among them, y0 is the parameter value of the in-car environment parameter corresponding to the outdoor fresh air, v0 is the current air volume in the car, V cabin is the total volume of the vehicle, y max It is the upper limit threshold of the in-vehicle environmental parameters based on health, safety and comfort, that is, the health, comfort and safety upper limit threshold.

10. A vehicle cabin ventilation control system, characterized in that: include: An acquisition and calculation module, used to acquire data of each in-vehicle environmental parameter, and then calculate the change rate corresponding to each in-vehicle environmental parameter; A first calculation module is used to calculate the corresponding shortest time t1 for completely updating the in-vehicle environment by using fresh air based on each of the in-vehicle environment parameter data, the corresponding change rate and the corresponding out-vehicle environment parameter data; A second calculation module is used to calculate the corresponding longest waiting time t2 for the complete update of the in-vehicle environment when using the internal circulation based on each of the in-vehicle environment parameter data, the corresponding change rate and the health, comfort and safety upper limit threshold; Prediction module, used to predict the environmental impact parameter data within 2Δt time; The formulation and execution module is used to calculate the maximum value t of each environmental impact parameter data and the shortest time. 1max and the minimum value of the longest waiting time t 2min Determine and implement appropriate ventilation control strategies.

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