Urban rail transit air conditioning control method and device and storage medium

Abstract

The present application relates to air conditioner control technical field, especially in urban rail transit air conditioner control method, device and storage medium.It is determined that the train is in the parking time length of poor ventilation environment, if the parking time length is greater than or equal to the first threshold value, then control air conditioning system according to the operation of load reduction mode, determine whether air conditioning system triggers high pressure protection mechanism, if triggering high pressure protection mechanism, then the high pressure alarm frequency triggered by air conditioning system is counted, if the high pressure alarm frequency is greater than or equal to the second threshold value, then control air conditioning system high pressure locking nature stop, when detecting the train running speed is greater than 0, the refrigeration capacity of air conditioning system is restored.The present application can combine the poor ventilation environment of train to reduce the load of air conditioner in advance, to maximize the guarantee that the train has certain refrigeration capacity, and the air conditioning system can be based on the running speed to remove the high pressure lock after high pressure lock, to ensure that the air conditioning system can work normally in the train running state, and is less likely to cause hot complaints.

Description

Technical Field

[0001] This invention relates to the field of air conditioning control technology, and more specifically to an air conditioning control method, device, and storage medium for urban rail transit. Background Technology

[0002] In the field of urban rail transit, the air conditioning system of a train may trigger high-pressure protection logic due to abnormal high pressure inside the cooling circuit caused by excessively high outside temperatures or prolonged exposure to poorly ventilated storage tracks or tunnels. One feasible high-pressure protection logic could be that when the outside temperature is too high, the train's air conditioning system operates at reduced load according to preset logic.

[0003] In the process of realizing this invention, the inventors discovered at least the following problems in the prior art:

[0004] When the air conditioning system is unloaded, if the high pressure in the air conditioning cooling circuit remains high, the air conditioning system will trigger a high pressure alarm or even a lock-up shutdown. Once the high pressure fault is locked, the corresponding system cannot be released without a restart, and the corresponding air conditioning cannot run in cooling mode. As a result, the train may need to be taken out of service, or after it is put into service, the lack of air conditioning may easily cause a lot of complaints. Summary of the Invention

[0005] In view of this, this application provides an air conditioning control method, device and storage medium for urban rail transit, which can reduce the air conditioning load in advance according to the poor ventilation environment of the train, so as to maximize the cooling capacity of the train. Furthermore, the air conditioning system can release the high-pressure lock based on the train speed after high-pressure lock, so as to ensure that the air conditioning system can work normally when the train is running, and is less likely to cause heat complaints.

[0006] In a first aspect, embodiments of the present invention provide an air conditioning control method for urban rail transit, the method comprising:

[0007] Determine the duration of train stops in pre-designated poorly ventilated environments;

[0008] If the parking duration is greater than or equal to the first threshold, the air conditioning system is controlled to operate in a load reduction mode;

[0009] Determine whether the air conditioning system triggers the high-pressure protection mechanism in the unload mode;

[0010] If the high-voltage protection mechanism is triggered, the frequency of high-voltage alarms triggered by the air conditioning system will be counted.

[0011] If the frequency of the high-pressure alarm is greater than or equal to the second threshold, then the air conditioning system is controlled to shut down under high-pressure lockout.

[0012] If the train's speed is detected to be greater than 0 after the air conditioning system is shut down, the air conditioning system's cooling capacity will be restored.

[0013] In some embodiments, determining the duration of train stopping in a preset poorly ventilated environment includes:

[0014] Based on the train's speed and platform signals, the train is determined to stop in a pre-set poorly ventilated environment, and the stopping time is recorded.

[0015] In some embodiments, after determining that the stopping time of the train in the preset poorly ventilated environment reaches the first threshold, the method further includes:

[0016] Adjust the opening of the fresh air door according to the passenger capacity of the train;

[0017] If there are no passengers on the train, the fresh air door is closed.

[0018] In some embodiments, after determining that the stopping time of the train in the preset poorly ventilated environment reaches the first threshold, the method further includes:

[0019] Determine the open / closed status of the train doors;

[0020] If the train door is open, then the fresh air door is closed.

[0021] In some embodiments, after controlling the air conditioning system to operate in a load reduction mode or controlling the air conditioning system to shut down under high pressure, the method further includes:

[0022] Increase the cooling capacity of air conditioning systems in adjacent carriages and / or other air conditioning systems in the same carriage.

[0023] In some embodiments, the method further includes:

[0024] If the air conditioning system does not trigger the high-pressure protection mechanism in the unloading mode, then when the train's speed is greater than 0, the air conditioning system will be controlled to exit the unloading mode and operate normally according to the cooling demand.

[0025] In some embodiments, the load reduction mode includes:

[0026] One or more of the following can be combined: opening the hot gas bypass, reducing the number of refrigeration equipment, and reducing the frequency of the air conditioning system.

[0027] Secondly, embodiments of the present invention provide an air conditioning control device for urban rail transit, comprising:

[0028] The determination module is used to determine the duration of train stopping in a preset poorly ventilated environment;

[0029] The load reduction module is used to control the air conditioning system to operate in a load reduction mode when the parking time is greater than or equal to a first threshold.

[0030] The high-voltage protection module is used to determine whether the air conditioning system triggers the high-voltage protection mechanism in the unloading mode; if the high-voltage protection mechanism is triggered, the frequency of high-voltage alarms triggered by the air conditioning system is counted; if the frequency of high-voltage alarms is greater than or equal to a second threshold, the air conditioning system is controlled to shut down under high-voltage lockout.

[0031] The restart module is used to restore the cooling capacity of the air conditioning system after a high-pressure locked shutdown, when the train's speed is detected to be greater than 0.

[0032] Thirdly, embodiments of the present invention provide an air conditioning control device for urban rail transit, comprising: a memory for storing computer program instructions and a processor for executing the program instructions, wherein when the computer program instructions are executed by the processor, the air conditioning control device performs the method described in the first aspect or any one of the first aspects.

[0033] Fourthly, embodiments of the present invention provide a computer-readable storage medium comprising a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform the method described in the first aspect or any one of the first aspects.

[0034] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects:

[0035] In this embodiment of the invention, when the train stops for an extended period in a poorly ventilated environment, the air conditioning system operates with reduced load in advance to ensure the train has a certain cooling capacity. Furthermore, if the air conditioning system still triggers a high-pressure lockout shutdown due to frequent high-pressure alarms after reduced load operation, its cooling capacity can be restored when the train speed is greater than 0. This ensures the normal operation of the air conditioning system while the train is running, and reduces the likelihood of heat-related complaints. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A flowchart of an air conditioning control method for urban rail transit provided as an embodiment of the present invention;

[0038] Figure 2 A flowchart illustrating a method for controlling a train air conditioning system in a poorly ventilated environment, as provided in an embodiment of the present invention;

[0039] Figure 3 Flowchart of another method for controlling a train air conditioning system in a poorly ventilated environment provided by an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of the structure of an air conditioning control device for urban rail transit provided in an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the structure of an air conditioning control device for urban rail transit provided in an embodiment of the present invention. Detailed Implementation

[0042] To better understand the technical solution of this application, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0043] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0044] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0045] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0046] Air conditioning systems are a crucial component of urban rail trains. To ensure the safe and reliable operation of these systems, a high-pressure fault handling logic is designed. In related technologies, this logic primarily relies on proprietary parameter data to determine whether a high-pressure protection mechanism needs to be triggered. This proprietary parameter data may include, for example, external temperature data and the high-pressure in the refrigeration circuit.

[0047] In one example, the refrigeration circuit of a fixed-frequency air conditioning system only has a high-pressure protection switch. In this type of system, the activation of the high-pressure protection mechanism is determined by the ambient temperature. When the system detects an ambient temperature exceeding a certain threshold, it triggers the high-pressure protection mechanism. Once activated, the hot gas bypass is opened to reduce the pressure in the refrigeration circuit, decreasing the likelihood of a high-pressure protection switch malfunction. If the high pressure in the refrigeration circuit still cannot be reduced after the hot gas bypass is opened, the high-pressure protection switch protectively disconnects, triggering a high-pressure fault in the air conditioning system. The air conditioning compressor then shuts down protectively and reports a high-pressure alarm to the vehicle network, alerting maintenance personnel for troubleshooting. The air conditioning compressor resumes operation after a protective shutdown period. If the number of high-pressure alarms exceeds a certain frequency, the air conditioning compressor will be locked due to a high-pressure fault. Once locked due to a high-pressure fault, the system cannot be deactivated in non-restart mode, preventing it from operating in refrigeration mode. The train may therefore need to be taken out of service before the air conditioning system can be restarted.

[0048] In another example, the refrigeration circuit of the fixed-frequency air conditioning system is equipped with a high-pressure protective switch, a high-pressure sensor, and an exhaust temperature sensor. The high-pressure sensor detects the high pressure in the refrigeration circuit, and the exhaust temperature sensor detects the exhaust temperature. In addition to monitoring the outside temperature, the air conditioning system can also preemptively open the hot gas bypass based on the high pressure and exhaust temperature to maximize the cooling capacity of the train carriages. If the high pressure continues to exceed the set value after the hot gas bypass is opened, the air conditioning compressor will shut down protectively and report a high-pressure alarm to the vehicle network, alerting maintenance personnel to investigate. The air conditioning compressor can resume operation after a protective shutdown period. If the number of high-pressure alarms exceeds a certain frequency, the air conditioning compressor will be locked due to a high-pressure fault. Once locked due to a high-pressure fault, the air conditioning system cannot be unlocked in non-restart mode, and the air conditioning system cannot operate in cooling mode. The train may therefore need to be taken out of service before the air conditioning system can be restarted.

[0049] In another example, for a variable frequency air conditioning system equipped with high-pressure and exhaust temperature sensors, multi-level frequency reduction can be implemented based on the magnitude of the high-pressure or exhaust temperature values. When the air conditioning compressor reduces its frequency to the minimum, if the high-pressure still continues to exceed the set value, the air conditioning compressor will shut down protectively and report a high-pressure alarm to the vehicle network, alerting maintenance personnel to investigate. The air conditioning compressor can resume operation after a protective shutdown period. If the number of high-pressure alarms exceeds a certain frequency, the air conditioning compressor will be locked due to a high-pressure fault. Once the air conditioning system is locked due to a high-pressure fault, it cannot be released in non-restart mode, and the air conditioning system cannot operate in cooling mode. The train may therefore need to be taken out of service before the air conditioning system can be restarted.

[0050] The examples given above only consider high-pressure protection measures triggered by malfunctions in the air conditioning system itself or excessively high outside temperatures. They do not fully consider situations where the high-pressure protection might be triggered even when the air conditioning system is functioning normally, such as when the train is stopped for an extended period in a poorly ventilated environment. When a train is stopped for a long time in a poorly ventilated storage track or tunnel, the accumulated outside temperature rises continuously, causing a rapid increase in coil temperature. Poor heat dissipation from the air conditioning system's condenser can also lead to a rapid increase in the high-pressure of the air conditioning system, triggering a high-pressure alarm lockout. According to the solutions given in the examples, if the high-pressure in the air conditioning cooling circuit remains high after the air conditioning system is unloaded, the air conditioning system will trigger a high-pressure alarm or even a lockout shutdown. Once the high-pressure fault lockout is established, the corresponding system cannot be deactivated without a restart, and the corresponding air conditioning cannot operate in cooling mode. This could lead to the train being taken out of service or, if it resumes operation, the lack of air conditioning could easily cause numerous complaints about heat.

[0051] To address the aforementioned technical problems, this invention provides an air conditioning control method for urban rail transit. This method correlates with the train's operating status and optimizes the control logic of the urban rail transit air conditioning system. It effectively avoids high-pressure lock-up issues in the air conditioning system caused by the train being in a poorly ventilated environment for extended periods, thus ensuring normal train operation and passenger comfort.

[0052] See Figure 1 This is a flowchart illustrating an air conditioning control method for urban rail transit provided in an embodiment of the present invention. Figure 1 As shown, the processing steps of this method include:

[0053] 101. Determine the duration of train stops in poorly ventilated environments.

[0054] 102. Determine whether the parking duration is greater than or equal to the first threshold. If the parking duration is greater than or equal to the first threshold, proceed to step 103; if the parking duration is less than the first threshold, proceed to step 104.

[0055] 103. Control the operation of the air conditioning system according to the first processing logic.

[0056] 104. Control the operation of the air conditioning system according to the second processing logic.

[0057] In step 101 above, the preset poorly ventilated environment can be a poorly ventilated storage track or tunnel. The train's operation status information can be used to determine whether it is stopped in a poorly ventilated environment. Optionally, the air conditioning system can obtain the train's operation status information through the vehicle network. This operation status information may include, for example, train speed and platform signals. When the train speed is 0, combined with the platform signals, it can be determined whether the train is stopped in a storage track or tunnel and the stopping time can be recorded.

[0058] In step 103 above, the first processing logic may include: determining the number of high-voltage alarms triggered by the air conditioning system, performing a high-voltage lockout shutdown of the air conditioning system based on the number of high-voltage alarms, and releasing the high-voltage lockout of the air conditioning system when the train speed is greater than 0. That is, after the air conditioning system is locked out of high voltage, the high-voltage lockout of the air conditioning system can be released based on the train speed, allowing the air conditioning system to restore its cooling capacity while the train is running.

[0059] In step 104 above, the second processing logic may include: controlling the operation of the air conditioning system based on the outside temperature and the high pressure of the air conditioning system's refrigeration circuit.

[0060] See Figure 2 The above is a flowchart of a method for controlling a train air conditioning system in a poorly ventilated environment, provided by an embodiment of the present invention. Figure 2 The method shown corresponds to the first processing logic described above. In this method, when it is determined that the train has been stopped for an extended period in a poorly ventilated environment, the air conditioning system is operated at reduced load. After the air conditioning system is locked due to high pressure, the high-pressure lock is released when the train speed is greater than 0, ensuring the normal operation of the train's air conditioning system during operation and guaranteeing the train's cooling needs. Figure 2 As shown, the processing steps of this method include:

[0061] 201. It is determined that the train stops in a poorly ventilated environment and the stopping time is greater than or equal to the first threshold.

[0062] 202. Control the air conditioning system to operate in a load reduction mode. Controlling the air conditioning system to operate in a load reduction mode may include one or more combinations of: activating hot air bypass, reducing the number of refrigeration units in operation, and reducing the frequency of the air conditioning system.

[0063] 203. Determine whether the air conditioning system has triggered the high-pressure protection mechanism. In some embodiments, the high-pressure protection mechanism can be triggered based on the high-pressure pressure in the air conditioning system's refrigeration circuit. When the high-pressure pressure in the refrigeration circuit is greater than the high-pressure threshold, it is determined that the high-pressure protection mechanism has been triggered, and step 204 is executed; otherwise, step 209 is executed.

[0064] 204. When the high-pressure protection mechanism is triggered, the air conditioning system is controlled to shut down protectively, and the high-pressure alarm count is incremented by 1. The protective shutdown of the air conditioning system can be, for example, a temporary shutdown of the air conditioning compressor, or a temporary disconnection of the high-pressure protection switch in the air conditioning refrigeration circuit.

[0065] 205. Determine whether the frequency of air conditioner high-pressure alarms is greater than or equal to the second threshold. The air conditioner high-pressure alarm frequency = number of high-pressure alarms / duration, or the air conditioner high-pressure alarm frequency is the number of alarms per unit time. If the air conditioner high-pressure alarm frequency is greater than or equal to the second threshold, proceed to step 206. For example, if the air conditioner triggers three high-pressure alarms within one hour, proceed to step 206. Otherwise, after the air conditioning system resumes operation, return to step 202 and continue operating in unloaded mode.

[0066] 206. Control the high-pressure lockout shutdown of the air conditioning system.

[0067] 207. After the air conditioning system is shut down under high pressure, determine whether the received train speed signal is greater than 0. If the train speed is greater than 0, proceed to step 208; if the train speed is not greater than 0, the air conditioning system remains shut down under high pressure.

[0068] 208. When the train speed is greater than 0, the air conditioning system is deactivated from high-pressure lockout and operates according to cooling demand.

[0069] 209. When the air conditioning system is operating in unloaded mode and the high-voltage protection mechanism is not triggered, determine whether the received train speed signal is greater than 0. If the train speed is greater than 0, proceed to step 208 to control the air conditioning system to operate according to cooling demand; otherwise, proceed to step 202 to continue operating in unloaded mode.

[0070] In this embodiment of the invention, when the train stops for an extended period in a poorly ventilated environment, the air conditioning system operates with reduced load in advance to ensure the train has a certain cooling capacity. Furthermore, if the air conditioning system still triggers a high-pressure lockout shutdown due to frequent high-pressure alarms after reduced load operation, its cooling capacity can be restored when the train speed is greater than 0. This ensures the normal operation of the air conditioning system while the train is running, and reduces the likelihood of heat-related complaints.

[0071] exist Figure 2 Based on the embodiments shown, this invention also provides a flowchart of a method for controlling a train air conditioning system in a poorly ventilated environment. Figure 3 The method shown corresponds to the first processing logic described above. In this method, the opening of the fresh air damper can be adjusted according to the passenger load on the train. When there are no passengers on the train, the fresh air damper can be closed to reduce heat exchange within the train carriages. Figure 3 As shown, after step 201 determines that the train has stopped in a poorly ventilated environment and the stopping time is greater than or equal to the first threshold, steps 301-303 are executed. Specifically, this includes:

[0072] Step 301: Determine if the passenger capacity exceeds a set value. If it does not exceed the set value, proceed to step 302; if it exceeds the set value, proceed to step 303. The set value in step 301 can be set according to actual needs; for example, the set value can be 0 or other values. Optionally, the air conditioning system can obtain the train's passenger capacity through the vehicle network.

[0073] 302, close the fresh air damper and proceed to step 202.

[0074] 303, keep the opening of the fresh air damper unchanged and jump to step 202.

[0075] After completing steps 301-303, see [link / reference]. Figure 2 Perform steps 202-209.

[0076] In this embodiment of the invention, in addition to reducing the load in advance based on the duration of train stops in poorly ventilated environments, the need to close the fresh air door can also be determined by considering the passenger load on the train. If there are no passengers or the passenger load is less than a certain value, the fresh air door can be closed to reduce the heat load on the air conditioning system and alleviate the high-pressure pressure on the air conditioning system. After taking the above measures, if the high-pressure protection mechanism is still triggered and the high-pressure alarm frequency is greater than or equal to the second threshold, the high-pressure of the air conditioning system is locked. Once the train speed is greater than 0, the high-pressure lock of the air conditioning system can be released, restoring the cooling capacity, ensuring that the air conditioning system can work normally while the train is running, and reducing the likelihood of heat-related complaints.

[0077] exist Figure 2 or Figure 3 Based on the method embodiment shown, this embodiment of the invention also provides another method for controlling the train air conditioning system in a poorly ventilated environment. This method corresponds to the first processing logic described above. In this method, when the train stops in a poorly ventilated environment and the stopping time is greater than or equal to a first threshold, the air conditioning system can obtain the opening and closing status of the train doors through the vehicle network. The opening degree of the fresh air damper can be adjusted according to the opening and closing status of the train doors. When the train doors are open, the cooling demand is greater than when the doors are closed. Therefore, when the train doors are open, the fresh air damper can be closed to reduce heat exchange in the train car. When the train doors are closed, the opening degree of the fresh air damper can be kept constant. After adjusting the opening degree of the fresh air damper according to the opening and closing status of the train doors, the system can then proceed according to... Figure 2 or Figure 3 The method shown executes the control method of the air conditioning system.

[0078] In other embodiments, when the air conditioning system is controlled to operate in a reduced load mode or the air conditioning system is controlled to shut down under high pressure, the cooling capacity of the air conditioning systems in adjacent vehicles and / or other vehicles in the same compartment can be increased to achieve rapid cooling of the current compartment.

[0079] Combination Figure 1 When, based on train speed and platform signals, it is determined that the train stops in a poorly ventilated environment but the stopping time is less than a first threshold, the air conditioning system can be controlled according to a second processing logic. This second processing logic specifically involves controlling the air conditioning system based on the outside temperature and the high-pressure value of the air conditioning system's refrigeration circuit. Specifically, this includes: determining whether the outside temperature exceeds a temperature protection threshold. If the outside temperature does not exceed the temperature protection threshold, the air conditioning system is controlled to operate according to cooling demand. During the process of controlling the air conditioning system according to cooling demand, it can be determined whether the high-pressure value of the refrigeration circuit is abnormal. If abnormal, the air conditioning system is controlled to operate in a reduced-load mode. In other cases, if the outside temperature exceeds the temperature protection threshold, the air conditioning system is controlled to operate in a reduced-load mode. After the air conditioning system is controlled to operate in reduced-load mode, it is determined whether high-pressure protection is triggered based on the high-pressure value of the refrigeration circuit. If high-pressure protection is triggered, the number of high-pressure alarms is counted. When the high-pressure alarm frequency exceeds a certain value, the air conditioning system is subjected to a high-pressure locked shutdown, which requires the air conditioning system to be restarted before exiting the shutdown. If the high-pressure protection is not triggered in the unloading mode, the air conditioning system will exit the unloading mode and operate according to the cooling demand once the outside temperature, exhaust temperature or high pressure return to normal.

[0080] Corresponding to the above-described air conditioning control method, this embodiment of the invention also provides an air conditioning control device for urban rail transit. For example... Figure 4 As shown, the device includes:

[0081] The determination module 401 is used to determine the stopping time of the train in a preset poorly ventilated environment;

[0082] The load reduction module 402 is used to control the air conditioning system to operate in a load reduction mode when the parking time is greater than or equal to a first threshold.

[0083] The high-voltage protection module 403 is used to determine whether the air conditioning system triggers the high-voltage protection mechanism in the unloading mode; if the high-voltage protection mechanism is triggered, the frequency of high-voltage alarms triggered by the air conditioning system is counted; if the frequency of high-voltage alarms is greater than or equal to a second threshold, the air conditioning system is controlled to shut down under high-voltage lockout.

[0084] The restart module 404 is used to restore the cooling capacity of the air conditioning system after the high-pressure locking shutdown is completed and the train speed is detected to be greater than 0.

[0085] The air conditioning control device for urban rail transit in this embodiment of the invention can execute the method of the embodiments shown above. For parts not described in detail in this embodiment, please refer to the relevant descriptions of the method embodiments. The execution process and technical effects of this technical solution can be found in the descriptions of the method embodiments, and will not be repeated here.

[0086] See Figure 5 This is a structural schematic diagram of an air conditioning control device for urban rail transit provided in an embodiment of the present invention. Figure 5 As shown, the air conditioning control device 500 may include a processor 501, a memory 502, and a communication unit 503. These components communicate via one or more buses. Those skilled in the art will understand that the structure of the air conditioning control device shown in the figure does not constitute a limitation on the embodiments of this application. It may be a bus topology or a star topology, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0087] The communication unit 503 is used to establish a communication channel, enabling the air conditioning control device to communicate with other devices. It can receive user data from other devices or send user data to other devices.

[0088] The processor 501 serves as the control center of the air conditioning control device. It connects to various parts of the entire air conditioning control device via various interfaces and lines. It executes software programs, instructions, and / or modules stored in the memory 502, and calls data stored in the memory to perform various functions of the air conditioning control device and / or process data. The processor can be composed of integrated circuits (ICs), such as a single packaged IC or multiple packaged ICs with the same or different functions connected together. For example, the processor 501 may include a central processing unit (CPU), a microcontroller unit (MCU), etc.

[0089] The memory 502 is used to store the execution instructions of the processor 501. The memory 502 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0090] When the execution instructions in memory 502 are executed by processor 501, the air conditioning control device 500 is able to execute the air conditioning control method for urban rail transit in this embodiment of the invention.

[0091] In a specific implementation, this application also provides a computer storage medium, which may store a program that, when executed, may include some or all of the steps of the various embodiments of the urban rail transit air conditioning control method provided in this application. The storage medium may be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0092] In a specific implementation, this application also provides a computer program product, wherein the computer program product includes executable instructions, which, when executed on a computer, cause the computer to perform some or all of the steps in various embodiments of the air conditioning control method for urban rail transit provided in this application.

[0093] This application also provides a non-transitory computer-readable storage medium that stores computer instructions that cause the computer to execute the method provided in this application.

[0094] Those skilled in the art will clearly understand that the techniques in the embodiments of the present invention can be implemented using software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solutions in the embodiments of the present invention, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application or some parts of the embodiments.

[0095] The same or similar parts between the various embodiments in this specification can be referred to mutually. In particular, the device embodiments and terminal embodiments are basically similar to the method embodiments, so the description is relatively simple, and the relevant parts can be referred to the description in the method embodiments.

Claims

1. A method for controlling air conditioning in urban rail transit, characterized in that, The method includes: Determine the duration of train stops in pre-designated poorly ventilated environments; If the parking duration is greater than or equal to the first threshold, the air conditioning system is controlled to operate in a load reduction mode; Determine whether the air conditioning system triggers the high-pressure protection mechanism in the unload mode; If the high-voltage protection mechanism is triggered, the frequency of high-voltage alarms triggered by the air conditioning system will be counted. If the frequency of the high-pressure alarm is greater than or equal to the second threshold, then the air conditioning system is controlled to shut down under high-pressure lockout. After the air conditioning system is shut down under high pressure, if the train's speed is detected to be greater than 0, the air conditioning system's cooling capacity will be restored.

2. The method according to claim 1, characterized in that, The determination of the train's stopping time in a pre-set poorly ventilated environment includes: Based on the train's speed and platform signals, the train is determined to stop in a pre-set poorly ventilated environment, and the stopping time is recorded.

3. The method according to claim 1, characterized in that, After determining that the train's stopping time in the preset poorly ventilated environment reaches the first threshold, the method further includes: Adjust the opening of the fresh air door according to the passenger capacity of the train; If there are no passengers on the train, the fresh air door is closed.

4. The method according to claim 1, characterized in that, After determining that the train's stopping time in the preset poorly ventilated environment reaches the first threshold, the method further includes: Determine the open / closed status of the train doors; If the train door is open, then the fresh air door is closed.

5. The method according to claim 1, characterized in that, After the air conditioning system is operated in a load reduction mode or the air conditioning system is shut down under high pressure, the method further includes: Increase the cooling capacity of air conditioning systems in adjacent carriages and / or other air conditioning systems in the same carriage.

6. The method according to claim 1, characterized in that, The method further includes: If the air conditioning system does not trigger the high-voltage protection mechanism in the unloading mode, then when the train's speed is greater than 0, the air conditioning system will be controlled to exit the unloading mode and operate according to the cooling demand.

7. The method according to claim 1, characterized in that, The load reduction mode includes: One or more of the following can be combined: opening the hot gas bypass, reducing the number of refrigeration equipment, and reducing the frequency of the air conditioning system.

8. An air conditioning control device for urban rail transit, characterized in that, include: The determination module is used to determine the duration of train stopping in a preset poorly ventilated environment; The load reduction module is used to control the air conditioning system to operate in a load reduction mode when the parking time is greater than or equal to a first threshold. The high-voltage protection module is used to determine whether the air conditioning system triggers the high-voltage protection mechanism in the unloading mode; if the high-voltage protection mechanism is triggered, the frequency of high-voltage alarms triggered by the air conditioning system is counted. If the frequency of the high-pressure alarm is greater than or equal to the second threshold, then the air conditioning system is controlled to shut down under high-pressure lockout. The restart module is used to restore the cooling capacity of the air conditioning system after a high-pressure locked shutdown, when the train's speed is detected to be greater than 0.

9. An air conditioning control device for urban rail transit, characterized in that, include: A memory for storing computer program instructions and a processor for executing the program instructions, wherein when the computer program instructions are executed by the processor, the air conditioning control device performs the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform the method according to any one of claims 1 to 7.

Images