Preconditioning method for a rail vehicle air conditioning unit

Abstract

The present disclosure provides a pre-adjustment method of a rail vehicle air conditioning unit, comprising: obtaining a plurality of preset parameters of the rail vehicle in a current running state, calculating a first vehicle heating load or a first vehicle cooling load based on the plurality of preset parameters; adjusting the operation mode of the air conditioning unit to a first operation mode based on the first vehicle heating load or the first vehicle cooling load; obtaining ticket information of a next station before a predetermined time when the rail vehicle is about to arrive at the next station, to obtain a passenger number change amount of the next station, and re-calculating a second vehicle heating load or a second vehicle cooling load based on the passenger number change amount; and adjusting the operation mode of the air conditioning unit to a second operation mode again within the predetermined time according to the second vehicle heating load or the second vehicle cooling load, to avoid fluctuations in the internal temperature of the rail vehicle.

Description

Technical Field

[0001] At least one embodiment of this disclosure relates to the field of rail transit technology, and more specifically to a pre-conditioning method for a rail vehicle air conditioning unit. Background Technology

[0002] The main method for controlling the interior temperature of relevant rail vehicles is to collect the fresh air temperature, calculate and set the target temperature inside the passenger compartment according to standards, and adjust the per capita fresh air volume based on the outside temperature. However, since the passenger load changes dynamically over time, the heat load inside the vehicle also changes accordingly. Setting the target temperature and controlling the fresh air volume solely based on the fresh air temperature would cause the air conditioning unit to frequently switch between ventilation, heating, and cooling modes. The frequent start-stop of the compressor would cause temperature fluctuations inside the vehicle, affecting passenger comfort. Summary of the Invention

[0003] To address at least one technical problem mentioned above and in other aspects in the prior art, this disclosure provides a pre-conditioning method for a rail vehicle air conditioning unit, which can avoid fluctuations in the internal temperature of the rail vehicle, stabilize the internal temperature of the rail vehicle, and improve passenger comfort.

[0004] According to one aspect of this disclosure, a pre-conditioning method for a rail vehicle air conditioning unit is provided, comprising:

[0005] Obtain multiple preset parameters of the above-mentioned rail vehicle in its current travel state, and calculate the heating load or cooling load of the first vehicle based on the multiple preset parameters.

[0006] Based on the heating load or cooling load of the first vehicle, the operating mode of the air conditioning unit is adjusted to the first operating mode.

[0007] Before the scheduled arrival time of the aforementioned rail vehicle at the next station, ticketing information for that next station is obtained to determine the change in passenger numbers at that station. Based on this change in passenger numbers, the heating load or cooling load of the second vehicle is recalculated.

[0008] Based on the heating load or cooling load of the second vehicle, the operating mode of the air conditioning unit is adjusted back to the second operating mode within the predetermined time to avoid fluctuations in the internal temperature of the rail vehicle.

[0009] According to embodiments of this disclosure, the pre-conditioning method for the above-mentioned rail vehicle air conditioning unit further includes:

[0010] The system uses cameras to analyze passengers' current state in real time, including their sleep state.

[0011] Obtain the ratio of passengers in the aforementioned sleep state to the total number of passengers, and recalculate the heating load or cooling load of the third vehicle based on this ratio; and

[0012] Based on the heating load or cooling load of the third vehicle, the operating mode of the air conditioning unit is adjusted to the third operating mode.

[0013] According to embodiments of this disclosure, the aforementioned preset parameters include at least the human thermal load.

[0014] The above-mentioned recalculation of the second vehicle's heating load or cooling load based on the aforementioned changes in passenger numbers includes:

[0015] The passenger capacity of the rail vehicle is obtained based on the aforementioned changes in passenger numbers, and the passenger heat load is calculated based on the aforementioned passenger capacity; and

[0016] Based on the aforementioned personnel heat load, adjust the aforementioned second vehicle heating load or second vehicle cooling load.

[0017] According to embodiments of this disclosure, obtaining the passenger capacity of the rail vehicle based on the aforementioned change in the number of passengers includes:

[0018] Based on the above ticketing information, the ticket sales situation is obtained, including sold-out and unsold tickets;

[0019] If the aforementioned ticket sales are not sold out, the aforementioned passenger number change is obtained based on the aforementioned ticketing information, thereby obtaining the aforementioned passenger capacity; and

[0020] If the aforementioned tickets are sold out, the passenger capacity is obtained based on the vehicle's rated passenger capacity.

[0021] According to embodiments of this disclosure, the preset parameters also include vehicle body heat transfer load, electrical equipment load, solar radiation load, and fresh air load.

[0022] According to the embodiments of this disclosure, the calculation formula for the vehicle heating load satisfies formula (1):

[0023] (1),

[0024] in, This indicates the heat transfer load of the aforementioned vehicle body. This indicates the heat load of the aforementioned personnel. This indicates the load of the aforementioned electrical equipment. This indicates the above-mentioned fresh air load.

[0025] According to the embodiments of this disclosure, the calculation formula for the vehicle cooling load satisfies formula (2):

[0026] (2),

[0027] in, This indicates the heat transfer load of the aforementioned vehicle body. This indicates the heat load of the aforementioned personnel. This indicates the load of the aforementioned electrical equipment. This indicates the above fresh air load. The above-mentioned solar radiation load is based on data obtained from a solar radiation sensor.

[0028] According to the embodiments of this disclosure, the calculation formula for the heat transfer load of the vehicle body satisfies formula (3):

[0029] (3),

[0030] Where F represents the heat transfer area of ​​the vehicle body, and K represents the overall heat transfer coefficient of the vehicle body. Indicates the external ambient temperature of the vehicle. The vehicle's internal temperature is indicated. Based on the vehicle's external annular temperature and internal temperature, the vehicle's heat transfer load is corrected, thereby correcting the vehicle's heating load.

[0031] According to the embodiments of this disclosure, the above-mentioned formula for calculating personnel heat load satisfies formula (4):

[0032] (4),

[0033] Where n represents the passenger capacity mentioned above, and q represents the heat dissipation of each passenger.

[0034] According to the embodiments of this disclosure, the above-mentioned formula for calculating the fresh air load satisfies formula (5):

[0035] (5),

[0036] in, This indicates the vehicle's fresh air volume. Indicates the air density inside the vehicle. This indicates the specific heat of the air inside the vehicle. Indicates the external ambient temperature of the vehicle. This indicates the temperature inside the vehicle.

[0037] According to embodiments of this disclosure, by acquiring multiple preset parameters of the rail vehicle in its current travel state, a first vehicle heating load or a first vehicle cooling load is calculated based on these preset parameters; based on the first vehicle heating load or the first vehicle cooling load, the operating mode of the air conditioning unit is adjusted to a first operating mode; before the rail vehicle arrives at the next station at a predetermined time, ticketing information for the next station is acquired to obtain the change in the number of passengers at the next station, and a second vehicle heating load or a second vehicle cooling load is recalculated based on the change in the number of passengers; and based on the second vehicle heating load or the second vehicle cooling load, the operating mode of the air conditioning unit is adjusted back to a second operating mode within a predetermined time. This solves the problem of temperature fluctuation inside the rail vehicle caused by the drastic change in the heat load demand caused by the change in passenger volume at multiple stations along the rail vehicle's route and the differences in external spatial environments, thus avoiding temperature fluctuations inside the rail vehicle, stabilizing the temperature inside the rail vehicle, and improving passenger comfort. Attached Figure Description

[0038] The foregoing contents, as well as other objects, features, and advantages of this disclosure, will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0039] Figure 1 A flowchart illustrating a pre-conditioning method for a rail vehicle air conditioning unit according to an embodiment of the present disclosure is shown schematically; and

[0040] Figure 2 A flowchart illustrating a pre-conditioning method for a rail vehicle air conditioning unit according to another embodiment of the present disclosure is shown. Detailed Implementation

[0041] The embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the present disclosure for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0042] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0043] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0044] When using expressions such as "at least one of A, B and C", they should generally be interpreted in accordance with the meaning that is commonly understood by those skilled in the art (e.g., "a system having at least one of A, B and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B and C, etc.).

[0045] The main method for controlling the interior temperature of relevant rail vehicles is to collect the fresh air temperature, calculate and set the target temperature inside the passenger compartment according to standards, and adjust the per capita fresh air volume based on the outside temperature. However, since the passenger load changes dynamically over time, the heat load inside the vehicle also changes accordingly. Setting the target temperature and controlling the fresh air volume solely based on the fresh air temperature would cause the air conditioning unit to frequently switch between ventilation, heating, and cooling modes. The frequent start-stop of the compressor would cause temperature fluctuations inside the vehicle, affecting passenger comfort.

[0046] In view of this, the present disclosure provides a pre-adjustment method for an air conditioning unit of a rail vehicle. This method involves acquiring multiple preset parameters of the rail vehicle during its current travel state, calculating a first vehicle heating load or a first vehicle cooling load based on these parameters, adjusting the air conditioning unit's operating mode to a first operating mode based on the first vehicle heating load or the first vehicle cooling load, acquiring ticketing information for the next station before the rail vehicle arrives at a predetermined time to obtain the change in passenger numbers at the next station, recalculating a second vehicle heating load or a second vehicle cooling load based on the change in passenger numbers, and adjusting the air conditioning unit's operating mode back to a second operating mode within a predetermined time according to the second vehicle heating load or the second vehicle cooling load. This method solves the problem of temperature fluctuations inside the rail vehicle caused by changes in passenger volume at multiple stations along the rail vehicle's route and differences in external spatial environments, thus avoiding temperature fluctuations inside the rail vehicle, stabilizing the internal temperature of the rail vehicle, and improving passenger comfort.

[0047] Figure 1 A flowchart illustrating a pre-conditioning method for a rail vehicle air conditioning unit according to an embodiment of the present disclosure is shown.

[0048] According to some embodiments of this disclosure, such as Figure 1 As shown, the pre-adjustment method for the air conditioning unit of the above-mentioned rail vehicle includes operations S101 to S104.

[0049] In operation S101, multiple preset parameters of the rail vehicle in its current travel state are obtained, and the heating load or cooling load of the first vehicle is calculated based on the multiple preset parameters.

[0050] In operation S102, the operating mode of the air conditioning unit is adjusted to the first operating mode based on the heating load or cooling load of the first vehicle.

[0051] In operation S103, ticketing information for the next station is obtained before the scheduled time when the rail vehicle is about to arrive at the next station, so as to obtain the change in the number of passengers at the next station. Based on the change in the number of passengers, the heating load or cooling load of the second vehicle is recalculated.

[0052] In operation S104, the air conditioning unit's operating mode is adjusted back to the second operating mode within a predetermined time according to the heating load or cooling load of the second vehicle, in order to avoid fluctuations in the internal temperature of the rail vehicle.

[0053] According to some embodiments of this disclosure, by acquiring multiple preset parameters of the rail vehicle in its current travel state, a first vehicle heating load or a first vehicle cooling load is calculated based on these preset parameters; based on the first vehicle heating load or the first vehicle cooling load, the operating mode of the air conditioning unit is adjusted to a first operating mode; before the rail vehicle arrives at the next station at a predetermined time, ticketing information for the next station is acquired, including ticketing information for passengers disembarking at the next station and ticketing information for passengers boarding at the next station, to obtain the change in the number of passengers at the next station; based on the change in the number of passengers, a second vehicle heating load or a second vehicle cooling load is recalculated; and based on the second vehicle heating load or the second vehicle cooling load, the operating mode of the air conditioning unit is adjusted to a second operating mode again within a predetermined time. This solves the problem of temperature fluctuation inside the rail vehicle caused by the drastic change in the heat load demand caused by the change in passenger volume at multiple stations along the rail vehicle's route and the differences in external spatial environments, thus avoiding temperature fluctuations inside the rail vehicle, stabilizing the temperature inside the rail vehicle, and improving passenger comfort.

[0054] According to some embodiments of this disclosure, adjusting the operating mode of an air conditioning unit includes any one of the following: mode selection and adjustment, adjusting the operating frequency of the air conditioning unit's compressor, adjusting the set temperature, adjusting the air volume, and adjusting the fan speed.

[0055] According to some embodiments of this disclosure, the first operating mode, the second operating mode, and the third operating mode are different from each other.

[0056] According to some alternative embodiments of this disclosure, the first operating mode is a cooling mode, in which the set temperature is 27°C and the fan speed is medium; the second operating mode is a cooling mode, in which the set temperature is 23°C and the fan speed is high; and the third operating mode is a cooling mode, in which the set temperature is 29°C and the fan speed is low.

[0057] According to some embodiments of this disclosure, in operation S103, ticketing information for the next station is obtained before the scheduled time when the rail vehicle is about to arrive at the next station, in order to obtain the change in the number of passengers at the next station. The aforementioned "before the scheduled time" includes any one of ten minutes, seven minutes, and five minutes before the scheduled time. By obtaining ticketing information for the next station before the scheduled time when the rail vehicle is about to arrive at the next station, and obtaining the change in the number of passengers at the next station, and recalculating the heating load or cooling load of the second vehicle based on the change in the number of passengers, it is possible to respond promptly to internal temperature fluctuations caused by changes in the actual passenger load inside the vehicle, adjust the operating mode of the air conditioning unit in advance, avoid fluctuations in the internal temperature of the vehicle when the rail vehicle arrives at the next station, stabilize the internal temperature of the rail vehicle, and improve passenger comfort.

[0058] For example, a rail vehicle operates in Beijing, Baoding, and Tianjin. The rail vehicle departs from Beijing at 9:00 and is scheduled to arrive in Baoding at 9:50. At 9:45, just before the scheduled arrival time of 9:50 at the next station in Baoding, the ticketing information for the next station is obtained to obtain the change in the number of passengers at the next station.

[0059] According to some embodiments of this disclosure, when a rail vehicle is about to arrive at the next station, there will be a certain number of passengers boarding and a certain number of passengers alighting. The change in the number of passengers is the absolute value of the difference between the number of passengers before arriving at the next station and the number of passengers after arriving at the next station.

[0060] According to some alternative embodiments of this disclosure, when the rail vehicle is about to arrive at the next station, the number of passengers in the car before arriving at the next station is 30, and the number of passengers in the car after arriving at the next station is 60. Therefore, the change in the number of passengers when the rail vehicle arrives at the next station is 30.

[0061] According to some embodiments of this disclosure, the pre-conditioning method for the air conditioning unit of the rail vehicle further includes:

[0062] The system uses cameras to analyze passengers' current status in real time, including their sleep status.

[0063] Obtain the ratio of sleeping passengers to the total number of passengers, and recalculate the heating load or cooling load of the third vehicle based on this ratio; and

[0064] Based on the heating load or cooling load of the third vehicle, the operating mode of the air conditioning unit is adjusted back to the third operating mode.

[0065] According to some embodiments of this disclosure, by using a camera to analyze the current state of passengers in the vehicle in real time, the ratio of passengers in a sleeping state to the total number of passengers is obtained, and the heating load or cooling load of the third vehicle is recalculated based on the ratio; and the operating mode of the air conditioning unit is adjusted to the third operating mode again according to the heating load or cooling load of the third vehicle, so that the temperature inside the vehicle can always be kept within the range most comfortable for passengers, thereby improving the passenger's travel comfort.

[0066] According to some embodiments of this disclosure, each carriage of the rail vehicle is equipped with a camera. By using the camera to capture and analyze data in real time, the actual passenger capacity of each carriage can be obtained. Furthermore, by using the camera to analyze the behavior, posture, and body characteristics of each passenger in the carriage in real time, the current status of the passengers in the carriage can be determined.

[0067] Figure 2 A flowchart illustrating a pre-conditioning method for a rail vehicle air conditioning unit according to another embodiment of the present disclosure is shown.

[0068] According to some embodiments of this disclosure, such as Figure 2 As shown, the pre-adjustment method for the air conditioning unit of the above-mentioned rail vehicle includes operations S201~S207.

[0069] In operation S201, multiple preset parameters of the rail vehicle in its current travel state are obtained, and the heating load or cooling load of the first vehicle is calculated based on the multiple preset parameters.

[0070] In operation S202, the operating mode of the air conditioning unit is adjusted to the first operating mode based on the heating load or cooling load of the first vehicle.

[0071] In operation S203, ticketing information for the next station is obtained before the scheduled time when the rail vehicle is about to arrive at the next station, so as to obtain the change in the number of passengers at the next station. Based on the change in the number of passengers, the heating load or cooling load of the second vehicle is recalculated.

[0072] In operation S204, the air conditioning unit's operating mode is adjusted back to the second operating mode within a predetermined time, based on the heating load or cooling load of the second vehicle, in order to avoid fluctuations in the internal temperature of the rail vehicle.

[0073] In operation S205, the current state of passengers is analyzed in real time using cameras, including their sleeping state.

[0074] In operation S206, the ratio of passengers in a sleeping state to the total number of passengers is obtained, and the heating load or cooling load of the third vehicle is recalculated based on the ratio.

[0075] In operation S207, the air conditioning unit's operating mode is adjusted back to the third operating mode based on the heating load or cooling load of the third vehicle.

[0076] According to some embodiments of this disclosure, the passenger's current state also includes being awake.

[0077] According to some embodiments of this disclosure, when a rail vehicle is in a specific state for a period of time longer than a preset time, the current state of passengers is analyzed in real time using a camera to obtain the ratio of passengers in a sleeping state to the total number of passengers. Based on the ratio, the heating load or cooling load of the third vehicle is recalculated. Based on the heating load or cooling load of the third vehicle, the operating mode of the air conditioning unit is adjusted to the third operating mode.

[0078] According to some embodiments of this disclosure, the preset time period includes any one and a half hours, one hour, and half an hour. Specific states include the stationary state upon arrival at a station and the traveling state.

[0079] According to some alternative embodiments of this disclosure, when the rail vehicle is stationary and the time the rail vehicle stays at the station is more than half an hour, the current status of the passengers is analyzed in real time using a camera to obtain the ratio of passengers in a sleeping state to the total number of passengers. Based on the ratio, the heating load or cooling load of the third vehicle is recalculated. Based on the heating load or cooling load of the third vehicle, the operating mode of the air conditioning unit is adjusted to the third operating mode.

[0080] According to some embodiments of this disclosure, when the rail vehicle is in motion, the current state of passengers is analyzed in real time using a camera to obtain the ratio of sleeping passengers to the total number of passengers. Based on the ratio, the heating load or cooling load of the third vehicle is recalculated. Based on the heating load or cooling load of the third vehicle, the operating mode of the air conditioning unit is adjusted to the third operating mode.

[0081] According to some embodiments of this disclosure, by obtaining the ratio of passengers in a sleeping state to the total number of passengers, the heating load or cooling load of the third vehicle is recalculated based on the ratio; and the operating mode of the air conditioning unit is adjusted to the third operating mode again according to the heating load or cooling load of the third vehicle. This can reduce the discomfort caused by passengers' changes in their own state to the temperature inside the vehicle, improve the passenger's riding experience, and ensure passenger comfort.

[0082] According to some embodiments of this disclosure, recalculating the heating load or cooling load of the third vehicle based on the proportional relationship includes recalculating the heating load or cooling load of the third vehicle when the ratio of passengers in a sleeping state to the total number of passengers is higher and / or lower than a preset ratio; and adjusting the operating mode of the air conditioning unit to the third operating mode again based on the heating load or cooling load of the third vehicle.

[0083] According to some embodiments of this disclosure, the preset ratio includes any one of 60%, 70%, and 80%.

[0084] According to some alternative embodiments of this disclosure, the current operating mode of the air conditioning unit is a cooling mode with a set temperature of 27°C and a high fan speed. If the ratio of passengers in a sleeping state to the total number of passengers is higher than a preset ratio of 60%, the operating mode of the air conditioning unit is adjusted to the third operating mode, that is, a cooling mode with a set temperature of 29°C and a low fan speed. If the ratio of passengers in a sleeping state to the total number of passengers is lower than a preset ratio of 60%, then the third operating mode is a cooling mode with a set temperature of 25°C and a high fan speed.

[0085] According to some embodiments of this disclosure, the preset parameters include at least the passenger heat load, and the recalculation of the second vehicle heating load or the second vehicle cooling load based on the change in the number of passengers includes:

[0086] The passenger capacity of rail vehicles is obtained based on changes in passenger numbers, and the thermal load of personnel is calculated based on the passenger capacity; and

[0087] Adjust the heating load or cooling load of the second vehicle according to the heat load of the personnel.

[0088] According to some embodiments of this disclosure, by obtaining the passenger capacity of the rail vehicle based on the change in the number of passengers, the heat load of the passengers is calculated based on the passenger capacity; and by correcting the heating load or cooling load of the second vehicle based on the heat load of the passengers, the operating mode of the air conditioning unit can be pre-adjusted based on the heating load or cooling load of the second vehicle, thereby solving the problem of temperature fluctuation inside the vehicle caused by drastic changes in the heat load demand inside the vehicle, stabilizing the internal temperature of the rail vehicle, and improving the passenger comfort.

[0089] According to some embodiments of this disclosure, obtaining the passenger capacity of a rail vehicle based on changes in the number of passengers includes:

[0090] Based on ticketing information, we obtain ticket sales data, including whether tickets are sold out or not.

[0091] When tickets are not sold out, the system obtains the change in passenger numbers based on ticketing information to determine passenger capacity; and

[0092] If tickets are sold out, the passenger capacity is determined based on the vehicle's rated passenger capacity.

[0093] According to some embodiments of this disclosure, the passenger capacity of a rail vehicle is obtained by statistical analysis of historical data of a station in a ticketing system and by the change in the number of passengers at a station.

[0094] According to some embodiments of this disclosure, when the tickets are not sold out, the change in the number of passengers is obtained based on the ticketing information, and the passenger capacity is obtained based on the change in the number of passengers. The passenger capacity is the change in the number of passengers when the rail vehicle arrives at the next station and the number of passengers who have not disembarked when the rail vehicle arrives at the next station.

[0095] According to some alternative embodiments of this disclosure, when the tickets are not sold out, the passenger change of a certain carriage arriving at the next station is obtained based on the ticketing information, which is 50 people. At the same time, the number of people who have not disembarked when the carriage arrives at the next station is 20 people. Then, the passenger capacity of the carriage at this time includes the passenger change of 50 people and the number of people who have not disembarked, that is, the passenger capacity n of the carriage at this time is 70 people. Based on the passenger capacity n=70 of the carriage at this time, the heat load of the carriage is calculated, and the vehicle heating load is corrected according to the heat load of the passengers.

[0096] According to some embodiments of this disclosure, when tickets are sold out, the passenger capacity is obtained based on the vehicle's rated passenger capacity, wherein the passenger capacity of each business class car is the rated number of business class passengers; the passenger capacity of each first class car is 95% of the rated number of first class passengers; and the passenger capacity of each second class car is 90% of the rated number of second class passengers.

[0097] According to some alternative embodiments of this disclosure, the rated passenger capacity of the business class is 10 people, so the passenger capacity of each business class car is approximately 10 people; the rated passenger capacity of the first class car is 50 people, so the passenger capacity of each first class car is approximately 48 people; and the rated passenger capacity of the second class car is 100 people, so the passenger capacity of each second class car is approximately 90 people.

[0098] According to some alternative embodiments of this disclosure, when tickets are sold out, the rated passenger capacity of business class is 10 people, so the passenger capacity of each business class carriage is approximately 10 people, i.e., n is approximately 10. The heat load of the business class carriage is calculated based on the passenger capacity of n≈10 per business class carriage. The rated passenger capacity of first class carriage is 50 people, so the passenger capacity of each first class carriage is approximately 48 people, i.e., n is approximately 48. The heat load of the first class carriage is calculated based on the passenger capacity of n≈48 per first class carriage. The rated passenger capacity of second class carriage is 100 people, so the passenger capacity of each second class carriage is approximately 90 people, i.e., n is approximately 90. The heat load of the second class carriage is calculated based on the passenger capacity of n≈90 per second class carriage.

[0099] According to some embodiments of this disclosure, the preset parameters also include vehicle body heat transfer load, electrical equipment load, solar radiation load, and fresh air load.

[0100] According to some embodiments of this disclosure, ticketing information for the next station is obtained before the scheduled arrival time of the rail vehicle, to obtain the change in passenger numbers at the next station; simultaneously, environmental parameter information such as solar radiation load and fresh air load is obtained. Based on the change in passenger numbers and environmental parameter information, the operating mode of the air conditioning unit is pre-adjusted to solve the problem of temperature fluctuations inside the vehicle caused by drastic changes in heat load demand, thereby stabilizing the internal temperature of the rail vehicle and improving passenger comfort.

[0101] According to some embodiments of this disclosure, the solar radiation load is obtained by a solar radiation sensor located near the front window of the driver's cab of the rail vehicle; the external ambient temperature of the vehicle is obtained by a temperature sensor located at the fresh air inlet of the rail vehicle; and the external ambient humidity of the vehicle is obtained by a humidity sensor located at the fresh air inlet of the rail vehicle.

[0102] According to some embodiments of this disclosure, a CO2 sensor is installed inside the rail vehicle. The CO2 sensor is suitable for detecting the concentration of CO2 inside the vehicle. By using the CO2 sensor to monitor the concentration of CO2 inside the vehicle in real time, when the concentration of CO2 inside the vehicle reaches a preset value, the operating mode of the air conditioning unit is actively adjusted to improve the passenger comfort.

[0103] According to some embodiments of this disclosure, by real-time monitoring of the CO2 concentration inside the vehicle and simultaneously adjusting the air conditioning unit mode, the CO2 concentration inside the vehicle can be prevented from exceeding 1500 ppm.

[0104] According to some alternative embodiments of this disclosure, the preset value of CO2 concentration in the vehicle includes any one of 700 ppm, 900 ppm, and 1500 ppm.

[0105] According to some embodiments of this disclosure, the formula for calculating the vehicle heating load satisfies formula (1):

[0106] (1),

[0107] in, Indicates the heat transfer load of the vehicle body. Indicates the heat load of personnel. Indicates the load of electrical equipment. This indicates the fresh air load.

[0108] According to some embodiments of this disclosure, the formula for calculating the vehicle cooling load satisfies formula (2):

[0109] (2),

[0110] in, Indicates the heat transfer load of the vehicle body. Indicates the heat load of personnel. Indicates the load of electrical equipment. Indicates the fresh air load. This represents the solar radiation load, which is obtained based on solar radiation sensors.

[0111] According to some embodiments of this disclosure, the formula for calculating the heat transfer load of the vehicle body satisfies formula (3):

[0112] (3),

[0113] Where F represents the heat transfer area of ​​the vehicle body, and K represents the overall heat transfer coefficient of the vehicle body. Indicates the external ambient temperature of the vehicle. It indicates the vehicle's internal temperature. Based on the vehicle's external annular temperature and internal temperature, the vehicle's heat transfer load is corrected, thereby correcting the vehicle's heating load.

[0114] According to some embodiments of this disclosure, after the network system of the rail vehicle receives the signal that the vehicle door is closed, it transmits the door closing signal and the actual passenger load information after the door is closed to the control host of the air conditioning unit in real time. The control host of the air conditioning unit corrects the vehicle's heating load based on the actual passenger load and adjusts the air conditioning unit's operating mode in a timely manner, thereby stabilizing the temperature environment inside the vehicle.

[0115] According to some embodiments of this disclosure, the formula for calculating personnel heat load satisfies formula (4):

[0116] (4),

[0117] Where n represents the passenger capacity and q represents the heat dissipation of each passenger.

[0118] According to some embodiments of this disclosure, the heat dissipation of each passenger changes according to the passenger's current state, with the heat dissipation when the passenger is asleep being less than the heat dissipation when the passenger is awake.

[0119] According to some embodiments of this disclosure, the formula for calculating the fresh air load satisfies formula (5):

[0120] (5),

[0121] in, This indicates the vehicle's fresh air volume. Indicates the air density inside the vehicle. This indicates the specific heat of the air inside the vehicle. Indicates the external ambient temperature of the vehicle. This indicates the temperature inside the vehicle.

[0122] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this disclosure can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this disclosure. In particular, the features described in the various embodiments and / or claims of this disclosure can be combined or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.

[0123] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of this disclosure is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. A pre-adjustment method for an air conditioning unit in a rail vehicle, comprising: Acquire multiple preset parameters of the rail vehicle in its current travel state, and calculate the heating load or cooling load of the first vehicle based on the multiple preset parameters; Based on the heating load or cooling load of the first vehicle, the operating mode of the air conditioning unit is adjusted to the first operating mode. Before the scheduled time when the rail vehicle is about to arrive at the next station, obtain the ticketing information of the next station, and obtain the ticket sales status based on the ticketing information, including sold out and not sold out; If the tickets are not sold out, the passenger volume is obtained by measuring the change in the number of passengers based on the ticketing information. If the tickets are sold out, the passenger capacity is obtained based on the vehicle's rated passenger capacity. The passenger thermal load is calculated based on the passenger capacity. Based on the personnel heat load, adjust the heating load or cooling load of the second vehicle; Based on the heating load or cooling load of the second vehicle, the operating mode of the air conditioning unit is adjusted back to the second operating mode within the predetermined time to avoid fluctuations in the internal temperature of the rail vehicle. The system uses cameras to analyze passengers' current state in real time, including their sleep state. Obtain the ratio of passengers in the sleep state to the total number of passengers, and recalculate the heating load or cooling load of the third vehicle based on the ratio. as well as Based on the heating load or cooling load of the third vehicle, the operating mode of the air conditioning unit is adjusted again to the third operating mode, which includes temperature and fan speed.

2. The pre-adjustment method for a rail vehicle air conditioning unit according to claim 1, wherein, The preset parameters also include vehicle body heat transfer load, electrical equipment load, solar radiation load, and fresh air load.

3. The pre-adjustment method for a rail vehicle air conditioning unit according to claim 2, wherein, The calculation formula for the vehicle heating load satisfies formula (1): （1）， in, This indicates the heat transfer load of the vehicle body. This indicates the heat load of the personnel. Indicates the load of the electrical equipment. This indicates the fresh air load.

4. The pre-adjustment method for a rail vehicle air conditioning unit according to claim 2, wherein, The calculation formula for the vehicle's cooling load satisfies formula (2): （2）， in, This indicates the heat transfer load of the vehicle body. This indicates the heat load of the personnel. Indicates the load of the electrical equipment. This indicates the fresh air load. The solar radiation load is represented by the solar radiation load, which is obtained based on a solar radiation sensor.

5. The pre-adjustment method for a rail vehicle air conditioning unit according to claim 2, wherein, The calculation formula for the heat transfer load of the vehicle body satisfies formula (3): （3）， Where F represents the heat transfer area of ​​the vehicle body, and K represents the overall heat transfer coefficient of the vehicle body. Indicates the external ambient temperature of the vehicle. This indicates the vehicle's interior temperature. The vehicle's heat transfer load is corrected based on the external ambient temperature and the vehicle's interior temperature, thereby correcting the vehicle's heating load.

6. The pre-adjustment method for a rail vehicle air conditioning unit according to claim 1, wherein, The formula for calculating the heat load of personnel satisfies formula (4): （4）， Where n represents the passenger capacity and q represents the heat dissipation of each passenger.

7. The pre-adjustment method for a rail vehicle air conditioning unit according to claim 2, wherein, The formula for calculating the fresh air load satisfies formula (5): （5）， in, This indicates the vehicle's fresh air volume. Indicates the air density inside the vehicle. This indicates the specific heat of the air inside the vehicle. Indicates the external ambient temperature of the vehicle. This indicates the temperature inside the vehicle.

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