Air conditioning control method, device, system and rail vehicle

Abstract

The present invention relates to the technical field of rail vehicles, and provides a method, device, system and rail vehicle for controlling air conditioning in a rail vehicle. The method comprises: obtaining a first number of passengers in a car as counted by video surveillance, and a degree of congestion in the car determined based on the first number of passengers; when the degree of congestion is unobstructed, determining the amount of fresh air required in the car based on the first number of passengers; when the degree of congestion is congested, obtaining a pre-calculated second number of passengers, and determining the amount of fresh air required in the car based on the larger value of the first number of passengers and the second number of passengers; and sending a control instruction to the air conditioner to control at least one of the opening degree and the operating frequency of the air conditioner air valve according to the required amount of fresh air in the car. The method of the present invention can obtain a relatively more accurate number of passengers, thereby being able to accurately calculate the amount of fresh air required in the car, accurately controlling the opening degree and operating frequency (applicable to variable frequency air conditioners) of the fresh air valve and exhaust valve of the air conditioner according to the fresh air volume, thereby achieving energy saving and improving riding comfort.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, and in particular to a method, device, and system for controlling air conditioning in a rail vehicle, and the rail vehicle. Background Art

[0002] In current rail vehicle air conditioning systems, fresh air volume is controlled by the number of passengers. This is primarily determined using a weight detection mechanism (air spring) and a pressure sensor. The air spring, mounted above the bogie, supports the weight of the vehicle and passengers. The total vehicle weight (sprung weight and bogie weight combined) minus the empty vehicle weight is calculated, and the resultant weight is divided by the average weight of a single passenger. The total vehicle fresh air volume is then calculated by multiplying the number of passengers by the fresh air volume required per person.

[0003] When the passenger load is small or the passenger load changes slightly, the pressure sensor of the air spring is insensitive and the passenger weight remains basically unchanged; when passengers carry a lot of luggage, the error in the number of passengers calculated by the air spring is large. The above situations will lead to the problem of inaccurate calculation of the fresh air volume in the rail vehicle, thereby affecting the power consumption and fresh air supply of the air-conditioning unit. Summary of the Invention

[0004] The present invention provides a method, device, system and rail vehicle for controlling air conditioning in a rail vehicle, which are used to solve the problem in the prior art that the amount of fresh air in a rail vehicle cannot be accurately calculated.

[0005] The present invention provides a method for controlling air conditioning in a rail vehicle, comprising:

[0006] Obtaining a first number of passengers in the carriage as counted by video surveillance, and a degree of congestion in the carriage determined based on the first number of passengers, wherein the degree of congestion is defined as follows: if the first number of passengers is less than the sum of the seat capacity and the standing passenger threshold within a predetermined speed range, the degree of congestion is unobstructed; otherwise, the degree of congestion is congested;

[0007] When the congestion level is unobstructed, determining the required fresh air volume in the carriage according to the first number of passengers;

[0008] When the congestion degree is congested, obtaining a pre-calculated second number of passengers, and determining a required fresh air volume in the vehicle compartment according to a larger value of the first number of passengers and the second number of passengers;

[0009] A control instruction for controlling at least one of the opening degree and the operating frequency of the air valve of the air conditioner is sent to the air conditioner according to the amount of fresh air required in the vehicle compartment.

[0010] According to a method for controlling air conditioning in a rail vehicle provided by the present invention, the congestion degree is defined as:

[0011] When the vehicle speed is less than or equal to 160 km / h and the first passenger number is less than the sum of the seat capacity and the standing passenger threshold, the congestion is unobstructed; otherwise, the congestion is congested. The standing passenger threshold is the standing passenger volume corresponding to a standing passenger density of 4 to 5 standing passengers per square meter.

[0012] According to a method for controlling air conditioning in a rail vehicle provided by the present invention, the congestion degree is defined as:

[0013] When the vehicle speed is greater than or equal to 200 km / h and the first passenger number is less than the sum of the seat capacity and the standing passenger threshold, the congestion is unobstructed; otherwise, the congestion is congested. The standing passenger threshold is the standing passenger volume corresponding to a standing passenger density of 2 to 3 standing passengers per square meter.

[0014] According to a method for controlling air conditioning in a rail vehicle provided by the present invention, obtaining a pre-calculated second number of passengers includes: obtaining a second number of passengers calculated by a door zone passenger counter.

[0015] According to a method for controlling air conditioning in a rail vehicle provided by the present invention, obtaining the pre-calculated second number of passengers includes: obtaining the second number of passengers detected by a weight detection mechanism.

[0016] According to a method for controlling air conditioning in a rail vehicle provided by the present invention, obtaining a pre-calculated second passenger number includes: obtaining a third passenger number calculated by a door area passenger counter and a fourth passenger number detected by a weight detection mechanism, and taking the larger value of the third passenger number and the fourth passenger number as the second passenger number.

[0017] The present invention also provides an air conditioning control device for a rail vehicle, comprising:

[0018] a passenger data acquisition module, configured to acquire a first number of passengers in the carriage as counted by video surveillance, and a degree of congestion in the carriage determined based on the first number of passengers, wherein the degree of congestion is defined as follows: if the first number of passengers is less than the sum of the seat capacity and the standing passenger threshold within a predetermined speed range, the degree of congestion is unobstructed; otherwise, the degree of congestion is congested;

[0019] a first fresh air volume determination module, configured to determine the required fresh air volume in the carriage according to the first number of passengers when the congestion degree is unobstructed;

[0020] a second fresh air volume determination module, configured to obtain a pre-calculated second number of passengers when the congestion degree is congested, and determine the required fresh air volume in the carriage according to the larger value of the first number of passengers and the second number of passengers;

[0021] The control instruction sending module is used to send a control instruction to the air conditioner to control at least one of the opening degree and operating frequency of the air valve of the air conditioner according to the fresh air volume required in the vehicle compartment.

[0022] The present invention also provides an air-conditioning controller, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any of the above-described air-conditioning control methods for rail vehicles when executing the program.

[0023] The present invention also provides an air-conditioning control system in a rail vehicle, comprising: an intelligent analysis host, a video monitoring device, a passenger number calculation device, and the above-mentioned air-conditioning controller, wherein the intelligent analysis host is connected to the video monitoring device and the air-conditioning controller, and the air-conditioning controller is connected to the passenger number calculation device;

[0024] The intelligent analysis host is configured to receive the first number of passengers identified by the video surveillance device, determine the degree of congestion in the carriage based on the first number of passengers, and send the first number of passengers and the degree of congestion to the air conditioning controller;

[0025] The passenger number calculating device is used to calculate the second passenger number;

[0026] The air conditioning controller is used to determine the required fresh air volume in the vehicle compartment based on the first number of passengers when the congestion level is unobstructed, or to obtain the second number of passengers calculated by the passenger number calculation device when the congestion level is congested, determine the required fresh air volume in the vehicle compartment based on the larger value of the first number of passengers and the second number of passengers, and send a control instruction to the air conditioner to control at least one of the opening degree and operating frequency of the air conditioning valve based on the fresh air volume.

[0027] The present invention also provides a rail vehicle, comprising: the above-mentioned rail vehicle air-conditioning control system.

[0028] The rail vehicle air conditioning control method, device, system, and rail vehicle provided by the present invention determine the degree of congestion in the vehicle compartment by using a first number of passengers in the vehicle compartment as counted by video surveillance. When the congestion degree is unobstructed, the required fresh air volume in the vehicle compartment is determined based on the first number of passengers. Alternatively, when the congestion degree is congested, a pre-calculated second number of passengers is obtained, and the required fresh air volume in the vehicle compartment is determined based on the larger of the first and second numbers of passengers. A control instruction for controlling at least one of the air valve opening and operating frequency of the air conditioner is sent to the air conditioner based on the fresh air volume. When the congestion degree is unobstructed, it indicates that the number of passengers in the vehicle compartment is relatively small. The number of passengers in the vehicle compartment can be accurately identified through video surveillance, thereby accurately calculating the required fresh air volume in the vehicle compartment. When the congestion level is congested, the first number of passengers identified by the video surveillance may be inaccurate and less than the actual number of passengers due to passengers blocking or overlapping each other. Therefore, when the congestion level is congested, the second number of passengers pre-calculated by other statistical methods is obtained as a reference, and the larger value of the first number of passengers and the second number of passengers is used as the final number of passengers to calculate the required amount of fresh air in the car. This makes up for the inaccurate first number of passengers collected by the video surveillance system and obtains a relatively more accurate number of passengers, so that the required amount of fresh air in the car can be accurately calculated, and the opening and operating frequency of the air-conditioning fresh air valve and exhaust air valve can be accurately controlled according to the fresh air volume (variable frequency air conditioning), thereby achieving energy saving and improving riding comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 1 is a flow chart of the air conditioning control method for a rail vehicle provided by the present invention;

[0031] Figure 2 Schematic diagram of the structure of the air-conditioning control device for a rail vehicle provided by the present invention;

[0032] Figure 3 It is a structural diagram of the air-conditioning controller provided by the present invention;

[0033] Figure 4 It is a structural schematic diagram of the air-conditioning control system in a rail vehicle provided by the present invention. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0035] The air conditioning control method for a rail vehicle according to an embodiment of the present invention is as follows: Figure 1 Shown, including:

[0036] Step S110: Obtain a first number of passengers in the carriage as counted by video surveillance, and a degree of congestion within the carriage determined based on the first number of passengers. The degree of congestion refers to the degree of congestion within the carriage; the greater the number of passengers, the more crowded the carriage. The degree of congestion is defined as follows: if the first number of passengers is less than the sum of the seat capacity and the standing passenger threshold within a predetermined speed range, the degree of congestion is considered unobstructed; otherwise, the degree of congestion is considered congested. Specifically, video surveillance uses image recognition of human features and / or facial features to count the number of passengers in the carriage, and the counted number of passengers is used as the first number of passengers.

[0037] Step S120: When the congestion level is unobstructed, determine the required fresh air volume within the carriage based on the first number of passengers. Specifically, the required fresh air volume within the carriage is determined by multiplying the required fresh air volume per passenger by the first number of passengers. The required fresh air volume per passenger is a pre-calibrated value based on different trains or different carriage types (e.g., hard seat, hard sleeper, etc.). The fresh air volume is the air volume obtained by subtracting the air volume from the air conditioner's output air volume.

[0038] Step S130: When the congestion degree is congested, obtain a pre-calculated second number of passengers, and determine the required amount of fresh air in the car based on the larger value of the first number of passengers and the second number of passengers (if they are equal, take one of them). Specifically, the required amount of fresh air in the car is determined by multiplying the amount of fresh air required for each passenger by the larger value of the first number of passengers and the second number of passengers.

[0039] Step S140: Sending a control instruction to the air conditioner for controlling at least one of the air conditioner valve opening and operating frequency based on the desired fresh air volume within the vehicle cabin. Specifically, for a fixed-frequency air conditioner, the control instruction is an instruction for adjusting the opening of the air conditioner's fresh air valve and exhaust valve. Adjusting the opening of these two valves adjusts the fresh air volume within the vehicle cabin. For a variable-frequency air conditioner, the control instruction is an instruction for adjusting the opening of the air conditioner's fresh air valve and exhaust valve, and may also be an instruction for adjusting the operating frequency. For example, when the outside temperature remains constant and the number of passengers in the vehicle cabin increases, the opening of the air conditioner's fresh air valve may be increased and / or the opening of the exhaust valve may be decreased, based on the desired fresh air volume within the vehicle cabin, so that the fresh air volume within the vehicle cabin reaches the desired volume.

[0040] In this embodiment, when the congestion level is unobstructed, it indicates that the number of passengers in the car is small. The number of passengers in the car can be accurately identified through video surveillance, thereby accurately calculating the amount of fresh air required in the car. When the congestion level is congested, the first number of passengers identified by video surveillance may be inaccurate and less than the actual number of passengers due to mutual obstruction or overlap between passengers. Therefore, when the congestion level is congested, the second number of passengers pre-calculated by other statistical methods is obtained as a reference, and the larger value of the first and second passenger numbers is used as the final passenger number to calculate the amount of fresh air required in the car. This compensates for the inaccuracy of the first passenger number collected by the video surveillance system, and obtains a relatively more accurate number of passengers, thereby accurately calculating the amount of fresh air required in the car. According to the amount of fresh air, the opening and operating frequency of the fresh air valve and exhaust valve of the air conditioner are accurately controlled (applicable to variable frequency air conditioners), thereby achieving energy saving and improving riding comfort.

[0041] It should be noted that the method of the above embodiment is deployed in an air-conditioning controller in actual application. By defining the congestion level, the air-conditioning controller only needs to store the congestion level and its corresponding processing logic. There is no need to determine the corresponding passenger number threshold based on the number of passengers counted by video surveillance or other sensor equipment, thereby reducing the computing load of the air-conditioning controller.

[0042] In this embodiment, the definition of congestion varies according to the train speed. Specifically, it can be defined as follows according to the different speed levels of the train:

[0043] When the vehicle speed is less than or equal to 160 km / h and the first passenger number is less than the sum of the seat capacity and the standing passenger threshold, the congestion is unobstructed; otherwise, the congestion is congested. The standing passenger threshold is the standing passenger volume corresponding to a standing passenger density of 4 to 5 standing passengers per square meter.

[0044] If the train speed is greater than or equal to 200 km / h and the first passenger count is less than the sum of the seat capacity and the standing passenger threshold, the congestion level is considered unimpeded. Otherwise, the congestion level is considered congested. The standing passenger threshold is the standing passenger volume corresponding to a standing passenger density of 2-3 passengers per square meter. This definition of congestion level allows for a quantitative and intuitive assessment of the degree of congestion within a train compartment.

[0045] In this embodiment, the method for obtaining the pre-calculated second passenger number includes: obtaining the second passenger number calculated by the door-area passenger counter. There are typically at least two door-area passenger counters, which count passengers entering and exiting the vehicle to calculate the number of passengers in the vehicle. Generally, when the passenger flow in and out of the vehicle is low, the calculation result is relatively accurate. However, when the passenger flow is high, especially when multiple people enter and exit the vehicle simultaneously, the door-area passenger counter may count inaccurately. The larger of the first passenger number and the second passenger number calculated by the door-area passenger counter is selected to determine the required fresh air volume in the vehicle. That is, when the first and second passenger numbers may be inaccurate, the larger value is selected to determine the required fresh air volume in the vehicle. This ensures that the fresh air delivery volume in the vehicle is close to or even meets the actual required fresh air volume in the vehicle.

[0046] In this embodiment, the method of obtaining the pre-calculated second number of passengers further includes: obtaining the second number of passengers detected by a weight detection mechanism (an air spring installed on the bogie).

[0047] Furthermore, the method for obtaining the pre-calculated second passenger count also includes: obtaining a third passenger count calculated by the door area passenger counter and a fourth passenger count detected by the weight detection mechanism, and using the larger of the third and fourth passenger counts as the second passenger count. Specifically, in the case of a congested passenger level, the passenger count is obtained through video surveillance, the door area passenger counter, and the weight detection mechanism. The maximum value of the three passenger counts is selected to determine the required fresh air volume within the vehicle, so that the final calculated fresh air volume is closer to or even meets the actual required fresh air volume within the vehicle.

[0048] The following describes the rail vehicle air conditioning control device provided by the present invention. The rail vehicle air conditioning control device described below and the rail vehicle air conditioning control method described above can refer to each other.

[0049] like Figure 2 As shown, the air conditioning control device for a rail vehicle provided by the present invention includes:

[0050] The passenger data acquisition module 210 is used to obtain the first number of passengers in the car counted by video surveillance, and the congestion level in the car determined based on the first number of passengers, wherein the congestion level is defined as: within a predetermined speed range, if the first number of passengers is less than the sum of the seat passenger capacity and the standing passenger threshold, the congestion level is unobstructed; otherwise, the congestion level is congested.

[0051] The first fresh air volume determination module 220 is configured to determine the required fresh air volume in the vehicle compartment according to the first number of passengers when the congestion level is unobstructed.

[0052] The second fresh air volume determination module 230 is used to obtain a pre-calculated second number of passengers when the congestion degree is congested, and determine the required fresh air volume in the car according to the larger value of the first number of passengers and the second number of passengers.

[0053] The control instruction sending module 240 is used to send a control instruction to the air conditioner to control at least one of the opening degree and operating frequency of the air conditioner valve according to the amount of fresh air required in the vehicle compartment.

[0054] The air conditioning control device in the rail vehicle of the present invention, when the congestion level is unobstructed, indicates that the number of passengers in the car is small. The number of passengers in the car can be accurately identified through video monitoring, thereby accurately calculating the amount of fresh air required in the car. When the congestion level is congested, due to mutual obstruction or overlap between passengers, the first number of passengers identified by the video monitoring may be inaccurate and less than the actual number of passengers. Therefore, when the congestion level is congested, the second number of passengers pre-calculated by other statistical methods is obtained as a reference, and the larger value of the first and second passenger numbers is used as the final passenger number to calculate the amount of fresh air required in the car. This makes up for the inaccuracy of the first passenger number collected by the video monitoring system, and obtains a relatively more accurate number of passengers, thereby accurately calculating the amount of fresh air required in the car, and accurately controlling the opening and operating frequency of the fresh air valve and exhaust valve of the air conditioner (applicable to variable frequency air conditioners) according to the fresh air volume, thereby achieving energy saving and improving riding comfort.

[0055] Optionally, the congestion degree is defined as:

[0056] When the vehicle speed is less than or equal to 160 km / h and the first passenger number is less than the sum of the seat capacity and the standing passenger threshold, the congestion is unobstructed; otherwise, the congestion is congested. The standing passenger threshold is the standing passenger volume corresponding to a standing passenger density of 4 to 5 standing passengers per square meter.

[0057] Optionally, the congestion degree is defined as:

[0058] When the vehicle speed is greater than or equal to 200 km / h and the first passenger number is less than the sum of the seat capacity and the standing passenger threshold, the congestion is unobstructed; otherwise, the congestion is congested. The standing passenger threshold is the standing passenger volume corresponding to a standing passenger density of 2 to 3 standing passengers per square meter.

[0059] Optionally, the second fresh air volume determination module 230 is specifically configured to obtain a second number of passengers calculated by a door zone passenger counter.

[0060] Optionally, the second fresh air volume determination module 230 is specifically configured to obtain a second number of passengers detected by a weight detection mechanism.

[0061] Optionally, the second fresh air volume determination module 230 is specifically used to obtain a third passenger number calculated by the door area passenger counter and a fourth passenger number detected by the weight detection mechanism, and take the larger value of the third passenger number and the fourth passenger number as the second passenger number.

[0062] Figure 3 An example of a physical structure diagram of an air conditioning controller is shown below. Figure 3 As shown, the air conditioning controller may include: a processor 310, a communication interface 320, a memory 330, and a communication bus 340, wherein the processor 310, the communication interface 320, and the memory 330 communicate with each other via the communication bus 340. The processor 310 may call the logic instructions in the memory 330 to execute the air conditioning control method in the rail vehicle, which includes:

[0063] The first number of passengers in the carriage as counted by video surveillance is obtained, and the degree of congestion in the carriage determined based on the first number of passengers, wherein the congestion is defined as: within a predetermined vehicle speed range, if the first number of passengers is less than the sum of the seat passenger capacity and the standing passenger threshold, the congestion is unobstructed; otherwise, the congestion is congested.

[0064] When the congestion level is unobstructed, the required fresh air volume in the vehicle compartment is determined according to the first number of passengers.

[0065] When the congestion degree is congested, a pre-calculated second number of passengers is obtained, and the required fresh air volume in the vehicle compartment is determined according to the larger value of the first number of passengers and the second number of passengers.

[0066] A control instruction for controlling at least one of the opening degree and the operating frequency of the air valve of the air conditioner is sent to the air conditioner according to the amount of fresh air required in the vehicle compartment.

[0067] In addition, the logic instructions in the above-mentioned memory 330 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0068] The present invention also provides an air conditioning control system for a rail vehicle, such as Figure 4 As shown, it includes: an intelligent analysis host 410, a video surveillance device 420, a passenger number calculation device 430 and the above-mentioned air-conditioning controller 440, the intelligent analysis host 410 is connected to the video surveillance device 420 and the air-conditioning controller 440, and the air-conditioning controller 440 is connected to the passenger number calculation device 430.

[0069] The intelligent analysis host 410 is used to receive the first number of passengers identified by the video surveillance device 420, determine the congestion level in the vehicle compartment based on the first number of passengers, and send the first number of passengers and the congestion level to the air conditioning controller 440.

[0070] The passenger number calculation device 430 is used to calculate the second passenger number. The passenger number calculation device 430 is a gate area passenger counter and / or a weight detection mechanism.

[0071] The air conditioning controller 440 is used to determine the required amount of fresh air in the car based on the first number of passengers when the congestion level is unobstructed, or to obtain the second number of passengers calculated by the passenger number calculation device 430 when the congestion level is congested, determine the required amount of fresh air in the car based on the larger value of the first number of passengers and the second number of passengers, and send a control instruction to the air conditioner to control at least one of the opening and operating frequency of the air conditioning valve according to the required amount of fresh air in the car.

[0072] By defining the degree of congestion, the intelligent analysis host 410 converts the number of passengers into the degree of congestion according to the preset definition of congestion. The air conditioning controller 440 only needs to store the degree of congestion and its corresponding processing logic. There is no need to determine the corresponding passenger number threshold based on the number of passengers counted by video surveillance or other sensor equipment (such as: door area passenger counters and / or weight detection mechanisms), thereby reducing the computing load of the air conditioning controller 440.

[0073] The present invention also provides a rail vehicle, comprising: the above-mentioned air conditioning control system in the rail vehicle, through which the control system can accurately calculate the amount of fresh air required in the rail vehicle compartment, and accurately control the opening and operating frequency of the fresh air valve and exhaust air valve of the air conditioner according to the fresh air volume (applicable to variable frequency air conditioners), thereby achieving energy saving and improving riding comfort.

[0074] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0075] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for controlling air conditioning in a rail vehicle, characterized in that: include: Obtaining a first number of passengers in the carriage as counted by video surveillance, and a degree of congestion in the carriage determined based on the first number of passengers, wherein the degree of congestion is defined as follows: if the first number of passengers is less than the sum of the seat capacity and the standing passenger threshold within a predetermined speed range, the degree of congestion is unobstructed; otherwise, the degree of congestion is congested; When the congestion level is unobstructed, determining the required fresh air volume in the carriage according to the first number of passengers; When the congestion degree is congested, obtaining a pre-calculated second number of passengers, and determining a required fresh air volume in the vehicle compartment according to a larger value of the first number of passengers and the second number of passengers; sending a control instruction to the air conditioner to control at least one of the opening degree and the operating frequency of the air conditioner valve according to the amount of fresh air required in the vehicle compartment; The obtaining of the pre-calculated second passenger number includes: obtaining the third passenger number calculated by the door area passenger counter and the fourth passenger number detected by the weight detection mechanism, and taking the larger value of the third passenger number and the fourth passenger number as the second passenger number.

2. The method for controlling air conditioning in a rail vehicle according to claim 1, characterized in that: The congestion degree is defined as: When the vehicle speed is less than or equal to 160 km / h and the first passenger number is less than the sum of the seat capacity and the standing passenger threshold, the congestion is unobstructed; otherwise, the congestion is congested. The standing passenger threshold is the standing passenger volume corresponding to a standing passenger density of 4 to 5 standing passengers per square meter.

3. The method for controlling air conditioning in a rail vehicle according to claim 1, wherein: The congestion degree is defined as: When the vehicle speed is greater than or equal to 200 km / h and the first passenger number is less than the sum of the seat capacity and the standing passenger threshold, the congestion is unobstructed; otherwise, the congestion is congested. The standing passenger threshold is the standing passenger volume corresponding to a standing passenger density of 2 to 3 standing passengers per square meter.

4. An air conditioning control device for a rail vehicle, characterized in that: include: a passenger data acquisition module, configured to acquire a first number of passengers in the carriage as counted by video surveillance, and a degree of congestion in the carriage determined based on the first number of passengers, wherein the degree of congestion is defined as follows: if the first number of passengers is less than the sum of the seat capacity and the standing passenger threshold within a predetermined speed range, the degree of congestion is unobstructed; otherwise, the degree of congestion is congested; a first fresh air volume determination module, configured to determine the required fresh air volume in the carriage according to the first number of passengers when the congestion degree is unobstructed; a second fresh air volume determination module, configured to obtain a pre-calculated second number of passengers when the congestion degree is congested, and determine the required fresh air volume in the carriage according to the larger value of the first number of passengers and the second number of passengers; a control instruction sending module, configured to send a control instruction to the air conditioner for controlling at least one of an opening degree and an operating frequency of an air valve of the air conditioner according to the amount of fresh air required in the vehicle compartment; The second fresh air volume determination module is specifically used to obtain the third passenger number calculated by the door area passenger counter and the fourth passenger number detected by the weight detection mechanism, and take the larger value of the third passenger number and the fourth passenger number as the second passenger number.

5. An air conditioning controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method for controlling the air conditioning in a rail vehicle according to any one of claims 1 to 3 is implemented.

6. An air conditioning control system in a rail vehicle, characterized in that: include: An intelligent analysis host, a video surveillance device, a passenger number calculation device, and the air conditioning controller according to claim 5, wherein the intelligent analysis host is connected to the video surveillance device and the air conditioning controller, and the air conditioning controller is connected to the passenger number calculation device; The intelligent analysis host is configured to receive the first number of passengers identified by the video surveillance device, determine the degree of congestion in the carriage based on the first number of passengers, and send the first number of passengers and the degree of congestion to the air conditioning controller; The passenger number calculating device is used to calculate the second passenger number; The air conditioning controller is used to determine the required amount of fresh air in the vehicle compartment based on the first number of passengers when the congestion level is unobstructed, or to obtain the second number of passengers calculated by the passenger number calculation device when the congestion level is congested, determine the required amount of fresh air in the vehicle compartment based on the larger value of the first number of passengers and the second number of passengers, and send a control instruction to the air conditioner to control at least one of the opening degree and the operating frequency of the air conditioning valve based on the required amount of fresh air in the vehicle compartment.

7. A rail vehicle, characterized in that: include: The air conditioning control system in a rail vehicle as claimed in claim 6.

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