Control Method, Device, System, Medium and Train of Vehicle Air Conditioning System

Abstract

The present invention discloses a control method, device, vehicle air conditioning system, medium and train for a vehicle air conditioning system, which is applicable to the technical field of air conditioning system control. The method includes: obtaining multiple parameters of the vehicle air conditioning system and preset operating conditions; determining a corresponding variable frequency control strategy according to the relationship between the multiple parameters and the operating conditions; determining the parameter priority of the current operating condition to which it belongs under the corresponding variable frequency control strategy; coupling and correcting the initial ventilation volume of the variable frequency control strategy according to the parameter priority to obtain the final ventilation volume, and performing ventilation control according to the final ventilation volume. Through the comprehensive control of variables of multiple parameters, this method overcomes the problem that traditional fixed-frequency fans cannot adjust the indoor ventilation volume, achieves the purpose of stepless adjustment, and improves the adaptability of the control of the interior environment of the passenger compartment and the comfort inside the vehicle through multi-parameter variables and subsequent coupling control methods.

Description

Technical Field

[0001] The present invention relates to the technical field of air-conditioning system control, and particularly to a control method, device, system, medium and train for a vehicle air-conditioning system. Background Art

[0002] Most of the ventilators of the air-conditioning systems of existing urban rail vehicles are fixed-frequency fans, which have the disadvantage that the ventilation volume cannot be adjusted. For this reason, some of the ventilators of the air-conditioning systems of urban rail vehicles are replaced with variable-frequency fans.

[0003] For the current variable-frequency fans, the control of the air volume is relatively simple, and the considered factors are relatively single. For example, the temperature or the passenger capacity of the vehicle passenger compartment is used to control the air volume. Due to the single factor for controlling the air volume, the user experience inside the vehicle is relatively poor, and the actual requirements of the multi-variable comprehensive factors of the users and the vehicle cannot be met.

[0004] Therefore, it is urgent for those skilled in the art to seek a control method for a vehicle air-conditioning system. Summary of the Invention

[0005] The purpose of the present invention is to provide a control method, device, system, medium and train for a vehicle air-conditioning system. Through the comprehensive control of multiple parameter variables, the problem that the indoor ventilation volume cannot be adjusted by the traditional fixed-frequency fan is overcome, and the purpose of stepless adjustment is achieved. Through the multi-parameter variables and the subsequent coupling control method, the adaptability of the control of the internal environment of the passenger compartment is improved, and the comfort inside the vehicle is improved.

[0006] To solve the above technical problems, the present invention provides a control method for a vehicle air-conditioning system, including:

[0007] Obtaining multiple parameters of the vehicle air-conditioning system and a preset operating condition;

[0008] Determining a corresponding variable-frequency control strategy according to the relationship between the multiple parameters and the operating condition;

[0009] Under the corresponding variable-frequency control strategy, determining the parameter priority of the current operating condition;

[0010] Coupling and correcting the initial ventilation volume of the variable-frequency control strategy according to the parameter priority to obtain the final ventilation volume, and performing ventilation control according to the final ventilation volume.

[0011] Preferably, the multiple parameters include at least the vehicle passenger capacity, the outside temperature value, the inside temperature value, the supply air temperature value and / or the passenger compartment CO2 concentration value, and the operating conditions include basic conditions and safety conditions, wherein the basic conditions include at least cooling conditions, ventilation conditions and heating conditions; the safety conditions include at least vehicle door opening and closing conditions, emergency ventilation conditions, external fire conditions, pre-cooling and pre-heating conditions and forced cooling and heating conditions.

[0012] Preferably, determining the corresponding variable frequency control strategy according to the relationship between the multiple parameters and the operating conditions includes:

[0013] Determining a corresponding target basic operating condition based on a relationship between the vehicle outside temperature value and a preset condition;

[0014] determining a corresponding target safety operating condition based on a relationship between a driving state of the vehicle and an operating state of an air-conditioning unit of the vehicle air-conditioning system;

[0015] The frequency conversion control strategy is determined according to the target basic operating condition and / or the target safe operating condition.

[0016] Preferably, the preset conditions include a first preset condition and a second preset condition, and determining the corresponding target basic operating condition according to the relationship between the outside temperature value and the preset conditions includes:

[0017] Determining whether the vehicle exterior temperature value satisfies a first preset condition, wherein the first preset condition is that the vehicle exterior temperature value is less than a first threshold;

[0018] If so, determining the target basic operating condition to be the heating operating condition;

[0019] If not, determining whether the outside temperature value satisfies the second preset condition, wherein the second preset condition is that the outside temperature value is greater than or equal to the first threshold value and less than a second threshold value, and the second threshold value is greater than the first threshold value;

[0020] If satisfied, determining the target basic operating condition as the ventilation operating condition;

[0021] If not, the target basic operating condition is determined to be the refrigeration operating condition.

[0022] Preferably, the parameter priority includes a first priority and a second priority, and the coupling correction of the initial ventilation volume of the variable frequency control strategy according to the parameter priority to obtain the final ventilation volume includes:

[0023] Determining the initial ventilation volume corresponding to the current operating condition under the variable frequency control strategy according to the first priority;

[0024] Couple and correct the initial ventilation volume according to the second priority to obtain the final ventilation volume.

[0025] Preferably, when the current operating condition is the refrigeration condition, the first priority is the vehicle passenger capacity priority, and the second priority is the passenger compartment temperature priority, the supply air temperature priority, and / or the CO2 concentration priority. Correspondingly, determining the initial ventilation volume corresponding to the current operating condition under the variable frequency control strategy according to the first priority includes:

[0026] Obtain the current passenger capacity of the vehicle;

[0027] Determine the corresponding fan frequency according to the relationship between the current passenger capacity and the preset passenger capacity relationship;

[0028] Determine the corresponding initial ventilation volume according to the fan frequency;

[0029] Correspondingly, coupling and correcting the initial ventilation volume according to the second priority to obtain the final ventilation volume includes:

[0030] Obtain the current passenger compartment temperature value, supply air temperature value, and / or CO2 concentration value of the vehicle according to each of the second priorities;

[0031] Determine the respective corresponding corrected operating frequencies according to the relationship between the priority values under each of the second priorities and the corresponding preset conditions;

[0032] Couple and correct the initial ventilation volume according to the corrected operating frequency to obtain the final ventilation volume.

[0033] Preferably, when the current operating condition is the ventilation condition, the first priority is the vehicle passenger capacity priority, and the second priority is the passenger compartment temperature priority. Correspondingly, determining the initial ventilation volume corresponding to the current operating condition under the variable frequency control strategy according to the first priority includes:

[0034] Obtain the current passenger capacity of the vehicle;

[0035] Determine the corresponding fan frequency according to the relationship between the current passenger capacity and the preset passenger capacity relationship;

[0036] Determine the corresponding initial ventilation volume according to the fan frequency;

[0037] Correspondingly, coupling and correcting the initial ventilation volume according to the second priority to obtain the final ventilation volume includes:

[0038] Obtain the current passenger compartment temperature value of the vehicle;

[0039] Determine the corresponding corrected operating frequency according to the relationship between the current passenger compartment temperature value and the preset conditions of the passenger compartment temperature;

[0040] Perform a coupling correction on the initial ventilation volume according to the corrected operating frequency to obtain the final ventilation volume.

[0041] Preferably, when the current operating condition is the heating condition, the first priority is the heating mode of the air-conditioning unit of the vehicle, and the second priority is the passenger compartment temperature priority and / or the supply air temperature priority. Correspondingly, the step of determining the initial ventilation volume corresponding to the current operating condition under the variable frequency control strategy according to the first priority includes:

[0042] Obtain the current heating mode of the air-conditioning unit of the air-conditioning system of the vehicle;

[0043] Determine the corresponding fan frequency according to the current heating mode of the air-conditioning unit;

[0044] Determine the corresponding initial ventilation volume according to the fan frequency;

[0045] Correspondingly, the step of performing a coupling correction on the initial ventilation volume according to the second priority to obtain the final ventilation volume includes:

[0046] Obtain the current passenger compartment temperature value and / or the supply air temperature value of the vehicle according to each of the second priorities;

[0047] Determine the respective corresponding corrected operating frequencies according to the relationship between the priority values under each of the second priorities and the corresponding preset conditions;

[0048] Perform a coupling correction on the initial ventilation volume according to the corrected operating frequency to obtain the final ventilation volume.

[0049] Preferably, it further includes:

[0050] When a fault occurs in the ventilation fan frequency converter of the vehicle air-conditioning system, switch to the fixed-frequency ventilation mode of the air-conditioning system, wherein the frequency converter power supply contactor and the fixed-frequency power supply contactor corresponding to the variable-frequency ventilation mode and the fixed-frequency ventilation mode of the air-conditioning system are connected in an interlocking manner.

[0051] To solve the above technical problems, the present invention further provides a control device for a vehicle air-conditioning system, including:

[0052] An acquisition module, configured to acquire multiple parameters of the vehicle air-conditioning system and preset operating conditions;

[0053] A first determination module, configured to determine a corresponding variable frequency control strategy according to the relationship between the multiple parameters and the operating conditions;

[0054] A second determination module, configured to determine the parameter priority of the current operating condition to which it belongs under the corresponding frequency conversion control strategy;

[0055] A coupling correction module, configured to perform coupling correction on the initial ventilation volume of the frequency conversion control strategy according to the parameter priority to obtain the final ventilation volume, and perform ventilation control according to the final ventilation volume.

[0056] To solve the above technical problems, the present invention further provides a vehicle air conditioning system, including:

[0057] A memory, configured to store a computer program;

[0058] A processor, configured to implement the steps of the control method of the vehicle air conditioning system as described above when executing the computer program.

[0059] To solve the above technical problems, the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the control method of the vehicle air conditioning system as described above are implemented.

[0060] To solve the above technical problems, the present invention further provides a train, including the vehicle air conditioning system as described above.

[0061] A control method for a vehicle air conditioning system provided by the present invention includes: obtaining a plurality of parameters of the vehicle air conditioning system and a preset operating condition; determining a corresponding frequency conversion control strategy according to the relationship between the plurality of parameters and the operating condition; determining the parameter priority of the current operating condition to which it belongs under the corresponding frequency conversion control strategy; performing coupling correction on the initial ventilation volume of the frequency conversion control strategy according to the parameter priority to obtain the final ventilation volume, and performing ventilation control according to the final ventilation volume. This method overcomes the problem that traditional fixed-frequency fans cannot adjust the indoor ventilation volume through the variable comprehensive control of multiple parameters, achieves the purpose of stepless adjustment, and improves the adaptability of the control of the interior environment of the passenger compartment and the comfort inside the vehicle through multi-parameter variables and subsequent coupling control methods.

[0062] In addition, the present invention further provides a control device, a vehicle air conditioning system, a medium, and a train of the vehicle air conditioning system, which have the same beneficial effects as the control method of the vehicle air conditioning system as described above. Description of the Drawings

[0063] To more clearly illustrate the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0064] Figure 1 Flow chart of a control method for a vehicle air - conditioning system provided by an embodiment of the present invention;

[0065] Figure 2 Schematic diagram of control parameters for fan frequency control under basic conditions provided by an embodiment of the present invention;

[0066] Figure 3 Schematic diagram of the interlock between a variable - frequency fan and normal ventilation provided by an embodiment of the present invention;

[0067] Figure 4 Structure diagram of a control device for a vehicle air - conditioning system provided by an embodiment of the present invention;

[0068] Figure 5 Structure diagram of a vehicle air - conditioning system provided by an embodiment of the present invention. Detailed implementation manners

[0069] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0070] The core of the present invention is to provide a control method, device, system, medium and train for a vehicle air - conditioning system. Through the comprehensive control of multiple parameter variables, it overcomes the problem that traditional fixed - frequency fans cannot adjust the indoor ventilation volume, achieves the purpose of stepless adjustment, and improves the adaptability of the control of the interior environment of the passenger compartment and the comfort inside the vehicle through multi - parameter variables and subsequent coupling control methods.

[0071] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0072] It should be noted that most variable - frequency fans consider fewer and more single ventilation volume factors, mainly for the schemes of adjusting for the passenger compartment temperature or passenger capacity, and cannot meet the actual needs of passengers. The control method for the vehicle air - conditioning system provided by the present invention considers multiple factor variables to adjust the air supply volume of the air - conditioning system. At the same time, combined with the adjustment of the air supply volume frequency under different working conditions of the vehicle air - conditioning system, it can meet the ventilation volume requirements under different passenger capacities and different working states of the air - conditioning system, meet the requirements of indoor comfort under different working conditions, and thus control the variable - frequency control of the ventilator, which can effectively reduce power consumption, is beneficial to extending the service life cycle, and reducing the operation cost.

[0073] Figure 1 The flowchart of a control method for a vehicle air conditioning system provided by an embodiment of the present invention is as follows. Figure 1 As shown, the method includes:

[0074] S11: Obtain multiple parameters of the vehicle air conditioning system and a pre-set operating condition.

[0075] S12: Determine a corresponding variable frequency control strategy according to the relationship between the multiple parameters and the operating condition.

[0076] S13: Determine the parameter priority of the current operating condition to which it belongs under the corresponding variable frequency control strategy.

[0077] S14: Coupling and correcting the initial ventilation volume of the variable frequency control strategy according to the parameter priority to obtain the final ventilation volume, and perform ventilation control according to the final ventilation volume.

[0078] Specifically, obtain multiple parameters of the vehicle air conditioning system and a pre-set operating condition. Considering the influence of multiple variables and multiple parameters for the multiple parameters, multi-variable comprehensive control of the ventilation volume of the air conditioning system is required. For the operating condition, in addition to considering the basic operating conditions of the vehicle air conditioning system, the safety operating conditions in special cases also need to be considered.

[0079] As an embodiment, the multiple parameters at least include the vehicle passenger capacity, the outside temperature value, the inside temperature value, the supply air temperature value, and / or the CO2 concentration value in the passenger compartment. The operating conditions include basic operating conditions and safety operating conditions. Among them, the basic operating conditions at least include a refrigeration operating condition, a ventilation operating condition, and a heating operating condition; the safety operating conditions at least include a vehicle door opening and closing operating condition, an emergency ventilation operating condition, an external fire operating condition, a pre-cooling and pre-heating operating condition, and a forced refrigeration and heating operating condition.

[0080] Specifically, parameters such as the vehicle passenger capacity, the outside temperature value, the inside temperature value, the supply air temperature value, and the CO2 concentration value in the passenger compartment all affect the ventilation volume of the air conditioning system. Obtaining multiple parameters of the vehicle air conditioning system is to obtain various parameters at the current time. The basic operating conditions of the operating condition are the refrigeration, ventilation, and heating operating conditions determined according to the parameter of the outside temperature value. The vehicle door opening and closing operating condition of the safety operating condition is the variable frequency control of the ventilation fan of the air conditioning unit during the vehicle door opening and closing process when the vehicle arrives at the station. The emergency ventilation operating condition is that the air conditioning unit closes the return air valve and fully opens the fresh air valve. In the external fire operating condition, the fresh air valve and the exhaust air valve of the air conditioning unit are closed, and the air conditioning unit operates in the full return air mode.

[0081] Determine the corresponding variable-frequency control strategy according to the relationship between multiple current parameters and operating conditions. It should be noted that the operating conditions are divided into multiple types. They can exist simultaneously in different conditions or a single condition. There is no limitation here and it can be determined according to the actual multiple parameters. The corresponding operating conditions are determined by the current multiple parameters. Determining the variable-frequency control strategy according to the relationship between multiple parameters and operating conditions can be to first determine the corresponding operating conditions according to multiple parameters, or to determine the variable-frequency control strategy under this operating condition according to the relationship between multiple parameters and operating conditions.

[0082] As an embodiment, determining the corresponding variable-frequency control strategy according to the relationship between multiple parameters and operating conditions includes:

[0083] Determine the corresponding target basic condition according to the relationship between the outside vehicle temperature value and the preset condition;

[0084] Determine the corresponding target safety condition according to the relationship between the driving state of the vehicle and the operating state of the air-conditioning unit of the air-conditioning system;

[0085] Determine the variable-frequency control strategy according to the target basic condition and / or target safety condition.

[0086] Specifically, first determine the specific basic condition according to the outside vehicle temperature value, and then combine the driving state of the vehicle and the operating state of the air-conditioning unit of the air-conditioning system to determine the specific safety condition. Its variable-frequency control strategy is determined under the basic condition and / or safety condition, fully considering the combination of different conditions in order to give a comprehensive variable-frequency control strategy. The target basic condition is a certain basic condition among the refrigeration, ventilation, and heating conditions determined according to the parameter of the outside vehicle temperature value. The current target basic condition can be determined according to the specific outside vehicle temperature value. The target safety condition is one or more safety conditions that are independent or combined under different scenarios of the vehicle air-conditioning system.

[0087] Regarding how to determine the basic condition based on the outside vehicle temperature value, looking at the specific conditions of the basic condition, within what range the outside vehicle temperature value is defined can determine the basic condition. For example, when the outside vehicle temperature value is less than 19°C, it is in the ventilation condition, and when it is greater than 25°C, it is in the refrigeration condition. It can be understood that for which condition it is necessary to set to that condition. The driving state of the vehicle and the operating state of the air-conditioning unit of the air-conditioning system, the vehicle door opening and closing condition of the safety condition is the variable-frequency control of the air-conditioning unit ventilator during the vehicle arrival door opening and closing process to reduce the positive pressure in the passenger compartment and ensure the smooth opening and closing of the vehicle doors and the vehicle operation order. The emergency ventilation condition is that the air-conditioning unit closes the return air valve and fully opens the fresh air valve to ensure that the air sent into the passenger compartment is all fresh air, and the fan frequency operates at the frequency that meets the emergency ventilation volume of the whole vehicle. In the external fire condition, the fresh air valve and the exhaust air valve of the air-conditioning unit are closed, and the air-conditioning unit operates in the full return air mode.

[0088] Under the selected variable-frequency control strategy, in order to further determine the accuracy of the ventilation control of the variable-frequency control strategy, it is necessary to determine the parameter priorities under different working conditions. The parameter priorities in this embodiment are determined based on multiple parameters. For example, if only under the basic working condition, the first priority is the vehicle passenger capacity, and the second priorities are subsequent indoor temperature values, air supply temperature of the air conditioner, etc. If only under the safety working condition, the first priority is the vehicle passenger capacity, and the second priority is the CO2 concentration, etc., which are not limited. If under the basic working condition and the safety working condition, it is necessary to check the current working condition urgency and then determine the parameter priorities.

[0089] After determining the parameter priorities, the initial ventilation volume of the variable-frequency control strategy is coupled and corrected according to the parameter priorities to obtain the final ventilation volume. For the coupled correction, under the condition of considering the comprehensive control of the air supply volume by multiple variables, the deviations or the initial air supply volume are calibrated and corrected so as to make the ventilation control more accurate.

[0090] A control method for a vehicle air-conditioning system provided by an embodiment of the present invention includes: obtaining multiple parameters of the vehicle air-conditioning system and a preset operating condition; determining a corresponding variable-frequency control strategy according to the relationship between the multiple parameters and the operating condition; under the corresponding variable-frequency control strategy, determining the parameter priorities of the current operating condition to which it belongs; coupling and correcting the initial ventilation volume of the variable-frequency control strategy according to the parameter priorities to obtain the final ventilation volume, and performing ventilation control according to the final ventilation volume. This method overcomes the problem that traditional fixed-frequency fans cannot adjust the indoor ventilation volume through the comprehensive control of multiple parameter variables, achieves the purpose of stepless adjustment, and improves the adaptability of the control of the interior environment of the passenger compartment and the comfort inside the vehicle through multi-parameter variables and subsequent coupling control methods.

[0091] Based on the above embodiment, the preset conditions include a first preset condition and a second preset condition. Determining a corresponding target basic working condition according to the relationship between the outside temperature value and the preset conditions includes:

[0092] Judging whether the outside temperature value satisfies the first preset condition, where the first preset condition is that the outside temperature value is less than the first threshold;

[0093] If so, determining the target basic working condition as the heating working condition;

[0094] If not, then judging whether the outside temperature value satisfies the second preset condition, where the second preset condition is that the outside temperature value is greater than or equal to the first threshold and less than the second threshold, and the second threshold is greater than the first threshold;

[0095] If it is satisfied, determining the target basic working condition as the ventilation working condition;

[0096] If it is not satisfied, determining the target basic working condition as the refrigeration working condition.

[0097] Specifically, both the first preset condition and the second preset condition are thresholds or threshold ranges set for the outside temperature value. When the outside temperature value is less than the first threshold, that is, the first preset condition is met, it is determined as the heating condition. When the outside temperature value is greater than or equal to the first threshold and less than the second threshold, and the second threshold is greater than the first threshold, that is, the second preset condition is met, it is determined as the ventilation condition. If the second preset condition is not met, it is determined as the cooling condition.

[0098] For example: when the outside temperature value is greater than 19 °C, the air conditioning system is allowed to operate in the cooling condition. When the outside temperature value is between 16 - 19 °C, the air conditioning system is only allowed to operate in the ventilation condition. When the outside temperature value is below 16 °C, the air conditioning system is allowed to operate in the heating mode.

[0099] What is provided in this embodiment is only to determine the target basic condition through the relationship between the outside temperature value and the preset condition, and its target basic conditions do not overlap, so that the basic condition can be quickly determined to accelerate the formation of the control strategy.

[0100] Based on the above embodiment, as an example, Figure 2 This is a schematic diagram of the control parameters for the fan frequency control under the basic condition provided by the embodiment of the present invention. As Figure 2 shown, although there are the same parameters corresponding to different basic conditions, the parameter preset conditions for each condition are different. The parameter priority includes the first priority and the second priority. The initial ventilation volume of the variable frequency control strategy is coupled and corrected according to the parameter priority to obtain the final ventilation volume, including:

[0101] Determine the initial ventilation volume corresponding to the current operating condition under the variable frequency control strategy according to the first priority;

[0102] Couple and correct the initial ventilation volume according to the second priority to obtain the final ventilation volume.

[0103] Specifically, determine the initial ventilation volume of the current operating condition according to the first priority, and then couple and correct the initial ventilation volume according to the second priority. It should be noted that the coupling correction is carried out under multiple variable parameters, so the second priority is at least one, usually multiple variable parameters.

[0104] Correspondingly, the coupling correction can perform weight coupling on multiple variable parameters, or when the correction values of various trigger conditions are in the same direction, take the larger one of the correctors as the standard. When they are in the opposite direction, give priority to the larger corrector of the specific priority under the current operating condition. For example, if one needs to be corrected by 5000 and the other needs to be corrected by 4500, then select the larger corrector of 5000 as the standard.

[0105] As an embodiment, when the current operating condition is the refrigeration condition, the first priority is the vehicle passenger capacity priority, and the second priorities are the passenger compartment temperature priority, the supply air temperature priority, and / or the CO2 concentration priority. Correspondingly, determining the initial ventilation volume corresponding to the current operating condition under the variable frequency control strategy according to the first priority includes:

[0106] Obtain the current passenger capacity of the vehicle;

[0107] Determine the corresponding fan frequency according to the relationship between the current passenger capacity and the preset passenger capacity relationship;

[0108] Determine the corresponding initial ventilation volume according to the fan frequency;

[0109] Correspondingly, coupling and correcting the initial ventilation volume according to the second priority to obtain the final ventilation volume, including:

[0110] Obtain the current passenger compartment temperature value, supply air temperature value, and / or CO2 concentration value of the vehicle according to each second priority;

[0111] Determine the respective corresponding corrected operating frequencies according to the relationship between the priority values under each second priority and the corresponding preset conditions;

[0112] Couple and correct the initial ventilation volume according to the corrected operating frequencies to obtain the final ventilation volume.

[0113] Specifically, obtain the current passenger capacity of the vehicle, determine the fan frequency according to the preset relationship between the passenger capacity and the passenger capacity. The preset relationship between the passenger capacity and the fan frequency is related to the gradient. If the passenger capacity reaches a certain preset value, then to what value the fan frequency can be adjusted.

[0114] For example: when the passenger capacity is less than 20%, the fan frequency is the minimum fan frequency, that is, f = f min ;

[0115] When 20% ≤ passenger capacity ≤ 80%, the fan frequency is:

[0116]

[0117] Among them, 30 is the rotational speed;

[0118] When the passenger capacity ≥ 80%, the fan frequency is: f = f rat ;

[0119] Among them, f[[ID=4\7]] min is the lowest frequency at which the fan can operate for a long time, determined according to the fan characteristics, generally 30Hz;

[0120] f rat is the fan frequency corresponding to the rated air volume of the fan, generally 50Hz.

[0121] Determine the corresponding initial ventilation volume according to the fan frequency.

[0122] Obtain the current passenger compartment temperature value, supply air temperature value, and / or CO2 concentration value of the vehicle according to each second priority; determine their respective corrected operating frequencies according to the relationship between the priority values under each second priority and the corresponding preset conditions.

[0123] For example, when the second priority is the current passenger compartment temperature value, correct according to the temperature in the passenger compartment:

[0124] What threshold range does the preset condition corresponding to the passenger compartment temperature value fall into? For example: when the passenger compartment temperature value meets the preset condition below 25°C, the fan operating frequency needs to be reduced. For every 0.2°C decrease in the difference between the threshold 25°C and the current passenger compartment temperature value, the fan frequency is reduced by 1 Hz until f min ; when the passenger compartment temperature value meets the preset condition between 25°C and 27°C, no correction is made to the fan frequency; when the passenger compartment temperature value meets the preset condition greater than 27°C, the fan operating frequency is increased. For every 0.2°C increase in the difference between the threshold 27°C and the current passenger compartment temperature value, the fan frequency is increased by 1 Hz until the highest allowable operating frequency f max (The highest frequency at which the variable-frequency fan can operate for a long time, recommended to be defined as f rat +5 Hz).

[0125] When the second priority is the current supply air temperature value, correct according to the supply air temperature value:

[0126] What threshold range does the preset condition corresponding to the supply air temperature value fall into? For example: when the supply air temperature value meets the preset condition greater than 15°C, no correction is made to the fan frequency. When the supply air temperature value meets the preset condition between 13°C and 15°C, for every 0.1°C decrease, the fan frequency is increased by 1 Hz until the highest allowable operating frequency is reached.

[0127] When the second priority is the CO2 concentration, correct according to the CO2 concentration:

[0128] What threshold range does the preset condition corresponding to the current CO2 concentration fall into? For example: when the CO2 concentration meets the preset condition greater than 1500 ppm, increase the opening of the fresh air valve by one gear. If the CO2 concentration continues to rise above a certain threshold (2500 ppm), open the fresh air valve to the maximum, and at the same time increase the fan operating frequency to f rat ; when the CO2 concentration meets the preset condition less than or equal to 2000 ppm, no correction is made to the fan operating frequency.

[0129] The initial ventilation volume is coupled and corrected through each corrected operating frequency to obtain the final ventilation volume. In the above example, view and select the largest corrector as the current coupling correction. It is also possible to perform all corrections based on different correctors as the current coupling correction, which is not limited here and can be set according to the actual situation.

[0130] As an embodiment, when the current operating condition is a ventilation condition, the first priority is the vehicle passenger capacity priority, and the second priority is the passenger compartment temperature priority. Correspondingly, determining the initial ventilation volume corresponding to the current operating condition under the variable frequency control strategy according to the first priority includes:

[0131] Obtain the current passenger capacity of the vehicle;

[0132] Determine the corresponding fan frequency according to the relationship between the current passenger capacity and the preset passenger capacity relationship;

[0133] Determine the corresponding initial ventilation volume according to the fan frequency;

[0134] Correspondingly, coupling and correcting the initial ventilation volume according to the second priority to obtain the final ventilation volume, including:

[0135] Obtain the current passenger compartment temperature value of the vehicle;

[0136] Determine the corresponding corrected operating frequency according to the relationship between the current passenger compartment temperature value and the preset passenger compartment temperature condition;

[0137] Couple and correct the initial ventilation volume according to the corrected operating frequency to obtain the final ventilation volume.

[0138] Specifically, the embodiment of obtaining the initial ventilation volume has been described in detail in the above embodiment and will not be elaborated here. The second priority in this embodiment is the current passenger compartment temperature value, and it is corrected according to the temperature in the passenger compartment: what threshold range the preset condition corresponding to the passenger compartment temperature value is in. For example, when the passenger compartment temperature value meets the preset condition of being greater than 20 °C, it is necessary to increase the passenger compartment temperature. For every 0.2 °C increase, the fan frequency increases by 1 Hz until it reaches f rat ; when the passenger compartment temperature value meets the preset condition of being less than 16 °C, for every 0.2 °C decrease in the supply air temperature value, the fan frequency decreases by 1 Hz until it reaches f min .

[0139] It should be noted that the thresholds corresponding to the preset conditions for multiple parameters under each basic operating condition are different and can be set according to the actual situation.

[0140] As an embodiment, when the current operating condition is the heating condition, the first priority is the heating mode of the air-conditioning unit, and the second priority is the passenger compartment temperature priority and / or the supply air temperature priority. Correspondingly, determining the initial ventilation volume corresponding to the current operating condition under the variable-frequency control strategy according to the first priority includes:

[0141] Obtain the current heating mode of the air-conditioning unit of the vehicle;

[0142] Determine the corresponding fan frequency according to the current heating mode of the air-conditioning unit;

[0143] Determine the corresponding initial ventilation volume according to the fan frequency;

[0144] Correspondingly, coupling and correcting the initial ventilation volume according to the second priority to obtain the final ventilation volume, including:

[0145] Obtain the current passenger compartment temperature value and / or supply air temperature value of the vehicle according to each second priority;

[0146] Determine the respective corresponding corrected operating frequencies according to the relationship between the priority values under each second priority and the corresponding preset conditions;

[0147] Couple and correct the initial ventilation volume according to the corrected operating frequencies to obtain the final ventilation volume.

[0148] Specifically, obtain the current heating mode of the air-conditioning unit of the vehicle, and the heating mode includes that the electric heating of the air-conditioning unit or the heat pump is not turned on, the air-conditioning unit is in half-warm or low-frequency operation (heat pump heating), and the air-conditioning unit is in full-warm or high-frequency operation (heat pump heating).

[0149] In different heating modes, the corresponding fan frequencies are different. For example:

[0150] When the electric heating of the air-conditioning unit or the heat pump is not turned on, f = f min ;

[0151] When the air-conditioning unit is in half-warm or low-frequency operation (heat pump heating), f = f min + 5Hz;

[0152] When the air-conditioning unit is in full-warm or high-frequency operation (heat pump heating), f = f min + 10Hz;

[0153] Determine the corresponding initial ventilation volume according to the fan frequency.

[0154] Obtain the current passenger compartment temperature value and / or supply air temperature value of the vehicle according to each second priority, and determine the respective corresponding corrected operating frequencies according to the relationship between the priority values under each second priority and the corresponding preset conditions.

[0155] For example, when the second priority is the supply air temperature value, perform correction based on the supply air temperature:

[0156] What threshold range does the preset condition corresponding to the supply air temperature value fall into? For example, when the supply air temperature value meets the preset condition of being greater than 35°C, for every 0.5°C increase in the supply air temperature, the fan frequency increases by 1 Hz until it reaches f rat ; when the supply air temperature value meets the preset condition of being less than 25°C, for every 0.5°C decrease, the fan frequency decreases by 1 Hz until it reaches f min .

[0157] When the second priority is the passenger compartment temperature value, perform correction based on the passenger compartment temperature:

[0158] What threshold range does the preset condition corresponding to the passenger compartment temperature value fall into? For example, when the passenger compartment temperature value meets the preset condition of being greater than 18°C, for every 0.2°C increase in the difference between the threshold value of 18°C and the current passenger compartment temperature value, the fan frequency increases by 1 Hz until it reaches f rat ; when the passenger compartment temperature value meets the preset condition of being less than 12°C, for every 0.2°C decrease, the fan frequency decreases by 1 Hz until it reaches the maximum allowable operating frequency f min .

[0159] Perform coupled correction on the initial ventilation volume through each corrected operating frequency to obtain the final ventilation volume. In the above example, view and select the largest corrector as the current coupled correction. It is also possible to perform all corrections based on different correctors as the current coupled correction, which is not limited here and can be set according to the actual situation.

[0160] The examples in the above embodiments are only examples based on the target basic working conditions. In the case of the safety working conditions:

[0161] Determine the initial ventilation volume corresponding to the current operating condition under the variable frequency control strategy according to the first priority. In the safety working condition, the first priority can be the command mechanism triggered under different safety working conditions, and the initial ventilation volume can be determined based on the command mechanism and the ventilation volume of the current working condition. Then, switch according to the air valve mode of the air conditioning unit corresponding to different safety working conditions to obtain the final ventilation volume.

[0162] When the vehicle is in the door opening and closing working condition, the ventilation fan and the exhaust fan (if any) of the air conditioning unit perform variable frequency control to reduce the positive pressure in the passenger compartment to ensure smooth opening and closing of the vehicle doors and ensure the vehicle operation order. The specific logic is as follows:

[0163] After the vehicle arrives at the station and the door is opened, the air conditioning system receives the door opening command sent by the network, and the passenger compartment ventilation fan reduces its frequency to the lowest f min, if there is an exhaust fan, increase its operating frequency by 5 Hz; after the air-conditioning system receives the vehicle door closed in place command sent by the network, after a certain delay (30 s), the operating frequencies of the air-conditioning unit and the exhaust fan (if any) return to their original states. The delay time here takes into account the time for the driver to close the cab door after closing the passenger compartment door. If there is no separate cab door or the cab door is not an electric door, no delay is set. When opening and closing the door, the maximum continuous duration of the fan running at a reduced frequency does not exceed 2 min. The specific values exemplified in this embodiment can be changed according to the actual situation and are not limited herein.

[0164] In the emergency ventilation condition, the air-conditioning unit closes the return air valve and fully opens the fresh air valve to ensure that the air supplied to the passenger compartment is all fresh air, and the fan frequency operates at the frequency that meets the emergency ventilation volume of the whole vehicle.

[0165] In the external fire condition, close the fresh air valve and the exhaust air valve (if any) of the air-conditioning unit. The air-conditioning unit operates in the full return air mode, and the fan frequency operates at f rat .

[0166] In the precooling and preheating conditions, the fan frequency of the air-conditioning system operates at the rated frequency f rat .

[0167] In the forced refrigeration and heating conditions, the fan frequency of the air-conditioning system operates at the rated frequency f rat .

[0168] In this embodiment, for the determination process of the corresponding final ventilation volume under different operating conditions, the purpose of stepless adjustment is achieved. Through multi-parameter variables and subsequent coupling control methods, the adaptability of the control of the interior environment of the passenger compartment is improved.

[0169] Based on the above embodiment, it further includes:

[0170] When a fault occurs in the ventilation fan frequency converter of the vehicle air-conditioning system, switch to the fixed-frequency ventilation mode of the air-conditioning system, where the frequency converter power supply contactor and the fixed-frequency power supply contactor corresponding to the variable-frequency ventilation mode and the fixed-frequency ventilation mode of the air-conditioning system are connected in an interlock form.

[0171] It can be understood that if a fault occurs in the frequency converter, the ventilation fan cannot work properly, affecting the normal operation of the vehicle. When a fault occurs in the ventilation fan frequency conversion, the air-conditioning system automatically switches to the fixed-frequency ventilation mode, and the air-conditioning frequency converter power supply contactor and the fixed-frequency power supply contactor are interlocked. Figure 3 This is a schematic diagram of the interlock between a variable-frequency fan and normal ventilation provided by an embodiment of the present invention. As Figure 3As shown in the figure, the contactor 1 corresponding to the ventilator 4 is connected to the frequency converter 3 in the middle. The contactor 1 is the contactor for supplying power to the air conditioner frequency converter, and the contactor 2 is the contactor for supplying fixed-frequency power. The contactor 1 and the contactor 2 are connected by electrical interlock. AC380V supplies power to the two contactors.

[0172] The present embodiment provides a setting of a fixed-frequency ventilation bypass circuit to achieve the purpose that the ventilator can still work normally when the frequency converter fails, improving the redundancy of the air conditioner ventilation system.

[0173] The above has described in detail each embodiment corresponding to the control method of the vehicle air-conditioning system. On this basis, the present invention also discloses a control device of the vehicle air-conditioning system corresponding to the above method. Figure 4 It is a structural diagram of a control device of a vehicle air-conditioning system provided by an embodiment of the present invention. As Figure 4 shown, the control device of the vehicle air-conditioning system includes:

[0174] An acquisition module 11, configured to acquire multiple parameters of the vehicle air-conditioning system and a preset operating condition;

[0175] A first determination module 12, configured to determine a corresponding variable-frequency control strategy according to the relationship between the multiple parameters and the operating condition;

[0176] A second determination module 13, configured to determine the parameter priority of the current operating condition to which it belongs under the corresponding variable-frequency control strategy;

[0177] A coupling correction module 14, configured to perform coupling correction on the initial ventilation volume of the variable-frequency control strategy according to the parameter priority to obtain the final ventilation volume, and perform ventilation control according to the final ventilation volume.

[0178] Since the embodiments of the device part correspond to the above embodiments, the embodiments of the device part are described with reference to the embodiments of the above method part and will not be repeated here.

[0179] For the introduction of a control device of a vehicle air-conditioning system provided by the present invention, please refer to the above method embodiments. The present invention will not be repeated here, and it has the same beneficial effects as the above control method of the vehicle air-conditioning system.

[0180] Figure 5 It is a structural diagram of a vehicle air-conditioning system provided by an embodiment of the present invention. As Figure 5 shown, the device includes:

[0181] A memory 21, configured to store a computer program;

[0182] A processor 22, configured to implement the steps of the control method of the vehicle air-conditioning system when executing the computer program.

[0183] The vehicle air conditioning system provided in this embodiment may include, but is not limited to, a tablet computer, a notebook computer, a desktop computer, etc.

[0184] Among them, the processor 22 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 22 may be implemented in at least one hardware form of a Digital Signal Processor (DSP), a Field-Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA). The processor 22 may also include a main processor and a coprocessor. The main processor is a processor used to process data in the wake state, also known as the Central Processing Unit (CPU); the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor 22 may be integrated with a Graphics Processing Unit (GPU), and the GPU is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 22 may further include an Artificial Intelligence (AI) processor, and the AI processor is used to process computational operations related to machine learning.

[0185] The memory 21 may include one or more computer-readable storage media, and the computer-readable storage media may be non-transitory. The memory 21 may further include high-speed random access memory and non-volatile memory, such as one or more disk storage devices and flash storage devices. In this embodiment, the memory 21 is at least used to store the following computer program 211. After the computer program is loaded and executed by the processor 22, it can implement the relevant steps of the control method of the vehicle air conditioning system disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 21 may further include an operating system 212 and data 213, etc., and the storage method may be temporary storage or permanent storage. Among them, the operating system 212 may include Windows, Unix, Linux, etc. The data 213 may include, but is not limited to, the data involved in the control method of the vehicle air conditioning system, etc.

[0186] In some embodiments, the vehicle air conditioning system may further include a display screen 23, an input / output interface 24, a communication interface 25, a power supply 26, and a communication bus 27.

[0187] Those skilled in the art can understand that Figure 5 the structure shown in does not constitute a limitation on the vehicle air conditioning system, and it may include more or fewer components than shown in the figure.

[0188] The processor 22 implements the control method of the vehicle air conditioning system provided in any of the above embodiments by calling the instructions stored in the memory 21.

[0189] For the introduction of a vehicle air conditioning system provided by the present invention, please refer to the above method embodiments. The present invention will not be elaborated herein again, and it has the same beneficial effects as the control method of the above vehicle air conditioning system.

[0190] Furthermore, the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by the processor 22, the steps of the control method of the vehicle air conditioning system as described above are implemented.

[0191] It can be understood that if the method in the above embodiments is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and executes all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs that can store program codes.

[0192] For the introduction of a computer-readable storage medium provided by the present invention, please refer to the above method embodiments. The present invention will not be elaborated herein again, and it has the same beneficial effects as the control method of the above vehicle air conditioning system.

[0193] In addition, a train provided by the present application includes the above vehicle air conditioning system. For the introduction of a train provided by the present invention, please refer to the above method embodiments. The present invention will not be elaborated herein again, and it has the same beneficial effects as the above vehicle air conditioning system.

[0194] The above has introduced in detail a control method for a vehicle air conditioning system, a control device for a vehicle air conditioning system, a vehicle air conditioning system, a medium, and a train provided by the present invention. The various embodiments in the specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple. For related parts, reference can be made to the description in the method part. It should be noted that for those of ordinary skill in the art in the technical field of the present invention, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0195] It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

Claims

1. A control method for a vehicle air conditioning system, characterized in that, Including: Obtaining a plurality of parameters of the vehicle air conditioning system and a preset operating condition; Determining a corresponding variable frequency control strategy according to the relationship between the plurality of parameters and the operating condition; Determining the parameter priority of the current operating condition to which it belongs under the corresponding variable frequency control strategy; Coupling and correcting the initial ventilation volume of the variable frequency control strategy according to the parameter priority to obtain the final ventilation volume, and performing ventilation control according to the final ventilation volume; The plurality of parameters at least include the vehicle passenger capacity, the outside vehicle temperature value, the inside vehicle temperature value, the supply air temperature value, and / or the passenger compartment CO2 concentration value, and the operating conditions include a basic condition and a safety condition, wherein the basic condition at least includes a refrigeration condition, a ventilation condition, and a heating condition; the safety condition at least includes a vehicle door opening and closing condition, an emergency ventilation condition, an external fire condition, a pre-cooling and pre-heating condition, and a forced refrigeration and heating condition.

2. The control method of the vehicle air conditioning system according to claim 1, wherein, The determining a corresponding variable frequency control strategy according to the relationship between the plurality of parameters and the operating condition includes: Determining a corresponding target basic condition according to the relationship between the outside vehicle temperature value and a preset condition; Determining a corresponding target safety condition according to the relationship between the driving state of the vehicle and the operating state of the air conditioning unit of the vehicle air conditioning system; Determining the variable frequency control strategy according to the target basic condition and / or the target safety condition.

3. The control method of the vehicle air conditioning system according to claim 2, wherein The preset conditions include a first preset condition and a second preset condition. The determining a corresponding target basic condition according to the relationship between the outside vehicle temperature value and the preset conditions includes: Judging whether the outside vehicle temperature value satisfies the first preset condition, wherein the first preset condition is that the outside vehicle temperature value is less than a first threshold; If so, determining the target basic condition as the heating condition; If not, judging whether the outside vehicle temperature value satisfies the second preset condition, wherein the second preset condition is that the outside vehicle temperature value is greater than or equal to the first threshold and less than a second threshold, and the second threshold is greater than the first threshold; If satisfied, determining the target basic condition as the ventilation condition; If not satisfied, determining the target basic condition as the refrigeration condition.

4. The control method of the vehicle air conditioning system according to claim 3, characterized in that, The parameter priorities include a first priority and a second priority. The coupling and correcting the initial ventilation volume of the variable frequency control strategy according to the parameter priorities to obtain the final ventilation volume includes: Determining the initial ventilation volume corresponding to the current operating condition under the variable frequency control strategy according to the first priority; Coupling and correcting the initial ventilation volume according to the second priority to obtain the final ventilation volume.

5. The control method of the vehicle air conditioning system according to claim 4, characterized in that, When the current operating condition is the refrigeration condition, the first priority is the vehicle passenger capacity priority, and the second priority is the passenger compartment temperature priority, the supply air temperature priority, and / or the CO2 concentration priority. Correspondingly, the determining the initial ventilation volume corresponding to the current operating condition under the variable frequency control strategy according to the first priority includes: Obtaining the current passenger capacity of the vehicle; Determining a corresponding fan frequency according to the relationship between the current passenger capacity and a preset passenger capacity relationship; Determining the corresponding initial ventilation volume according to the fan frequency; Correspondingly, the coupling correction of the initial ventilation volume according to the second priority to obtain the final ventilation volume includes: Obtaining the current passenger compartment temperature value, supply air temperature value, and / or CO2 concentration value of the vehicle according to each of the second priorities; Determining the respective corresponding correction operating frequencies according to the relationship between the priority values under each of the second priorities and the corresponding preset conditions; Performing coupling correction on the initial ventilation volume according to the correction operating frequencies to obtain the final ventilation volume.

6. The control method of the vehicle air conditioning system according to claim 4, wherein, When the current operating condition is the ventilation condition, the first priority is the vehicle passenger capacity priority, and the second priority is the passenger compartment temperature priority. Correspondingly, determining the initial ventilation volume corresponding to the current operating condition under the variable frequency control strategy according to the first priority includes: Obtaining the current passenger capacity of the vehicle; Determining the corresponding fan frequency according to the relationship between the current passenger capacity and the preset passenger capacity relationship; Determining the corresponding initial ventilation volume according to the fan frequency; Correspondingly, the coupling correction of the initial ventilation volume according to the second priority to obtain the final ventilation volume includes: Obtaining the current passenger compartment temperature value of the vehicle; Determining the corresponding correction operating frequency according to the relationship between the current passenger compartment temperature value and the preset passenger compartment temperature condition; Performing coupling correction on the initial ventilation volume according to the correction operating frequency to obtain the final ventilation volume.

7. The control method of the vehicle air conditioning system according to claim 4, wherein When the current operating condition is the heating condition, the first priority is the air conditioner unit heating mode, and the second priority is the passenger compartment temperature priority and / or the supply air temperature priority. Correspondingly, determining the initial ventilation volume corresponding to the current operating condition under the variable frequency control strategy according to the first priority includes: Obtaining the current air conditioner unit heating mode of the air conditioning system of the vehicle; Determining the corresponding fan frequency according to the current air conditioner unit heating mode; Determining the corresponding initial ventilation volume according to the fan frequency; Correspondingly, the coupling correction of the initial ventilation volume according to the second priority to obtain the final ventilation volume includes: Obtaining the current passenger compartment temperature value and / or supply air temperature value of the vehicle according to each of the second priorities; Determining the respective corresponding correction operating frequencies according to the relationship between the priority values under each of the second priorities and the corresponding preset conditions; Performing coupling correction on the initial ventilation volume according to the correction operating frequencies to obtain the final ventilation volume.

8. The control method of the vehicle air conditioning system according to any one of claims 1 to 7, characterized in that, It further includes: When a failure occurs in the ventilation fan frequency converter of the vehicle air conditioning system, switching to the fixed-frequency ventilation mode of the air conditioning system, wherein the frequency converter power supply contactor and the fixed-frequency power supply contactor corresponding to the variable-frequency ventilation mode and the fixed-frequency ventilation mode of the air conditioning system are connected in an interlocking manner.

9. A control device for a vehicle air conditioning system, characterized in that, It includes: An acquisition module for acquiring multiple parameters of the vehicle air conditioning system and a preset operating condition; A first determination module for determining the corresponding variable frequency control strategy according to the relationship between the multiple parameters and the operating condition; A second determination module for determining the parameter priority of the current operating condition to which it belongs under the corresponding variable frequency control strategy; A coupling correction module, configured to perform coupling correction on the initial ventilation volume of the variable frequency control strategy according to the parameter priority to obtain the final ventilation volume, and perform ventilation control according to the final ventilation volume; The multiple parameters at least include vehicle passenger capacity, outdoor temperature value, indoor temperature value, supply air temperature value, and / or passenger compartment CO2 concentration value, and the operating conditions include basic conditions and safety conditions, where the basic conditions at least include a refrigeration condition, a ventilation condition, and a heating condition; the safety conditions at least include a vehicle door opening and closing condition, an emergency ventilation condition, an external fire condition, a pre-cooling and pre-heating condition, and a forced refrigeration and heating condition.

10. A vehicle air conditioning system, characterized in that, Comprising: A memory for storing a computer program; A processor, configured to implement the steps of the control method of the vehicle air conditioning system according to any one of claims 1 to 8 when executing the computer program.

11. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the control method of the vehicle air conditioning system according to any one of claims 1 to 8 are implemented.

12. A train, characterized in that, Comprising the vehicle air conditioning system according to claim 10.

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