Railway vehicle door area air supply system, air supply control method and control device

Abstract

The present application relates to a kind of rail vehicle door area air supply system, air supply control method and control device, including passenger room air supply main air duct, the main air duct is connected with door area air supply channel, the door area air supply channel is connected with the interior equipment in passenger room door area, air supply outlet for air supply to passenger room is arranged on the shell of the interior equipment, air in the main air duct is introduced into interior equipment by air supply channel and is sent to passenger room by air supply outlet on the interior equipment;And / or, the door area air supply channel is introduced into the gap between the shell of interior equipment and passenger room roof through the opening on passenger room roof, and is sent to passenger room through the gap.The present application can optimize passenger room door area air supply environment, and improve door area air supply effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioning technology of rail vehicles, in particular to a rail vehicle door area air supply system, an air supply control method and a control device. BACKGROUND

[0002] The intercity motor train unit uses the air supply air duct installed above the passenger compartment roof to deliver the air processed by the air conditioning unit into the passenger compartment, the air supply air duct generally comprises a main air duct connected with the air outlet of the air conditioning unit, the main air duct is connected with a branch air duct installed in the side roof of the passenger compartment, a hidden air supply outlet is formed in the side roof of the passenger compartment, the branch air duct is connected with the hidden air supply outlet, and the air processed by the air conditioning unit is delivered into the passenger compartment through the main air duct, the branch air duct and the hidden air supply outlet in the side roof of the passenger compartment.

[0003] Since the intercity motor train unit adopts two pairs of doors or three pairs of door structures, and the door areas are distributed in the middle part of the passenger compartment, the branch air duct cannot be arranged in the door area due to the existence of door mechanisms and door controllers and other equipment in the door area, the hidden air supply in the passenger compartment is disconnected and cannot be continuous in the door area, and thus the door area of the passenger compartment cannot obtain the processed air in time. In addition, the door area of the passenger compartment is often opened and closed for passengers to get on and off, there are many standing passengers in the door area, and the heat insulation of the door area is slightly worse than that of the passenger compartment area, which all cause the temperature in the door area to be difficult to control and the temperature fluctuation to be large. SUMMARY

[0004] The technical problem solved by the present application is to provide a rail vehicle door area air supply system for optimizing the air supply environment of the passenger compartment door area and improving the air supply effect of the door area.

[0005] Another technical problem solved by the present application is to provide a rail vehicle door area air supply control method for optimizing the air supply environment of the passenger compartment door area and improving the air supply effect of the door area, and to provide an air supply control device.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0007] A rail vehicle door area air supply system comprises a passenger compartment air supply main air duct, a door area air supply channel connected with the main air duct, an internal equipment in the door area of the passenger compartment, an air supply outlet provided on the shell of the internal equipment for supplying air into the passenger compartment, and / or the door area air supply channel is introduced into the gap between the shell of the internal equipment and the roof of the passenger compartment through the opening in the roof of the passenger compartment, and is supplied into the passenger compartment through the gap.

[0008] Further, the door area air supply channel comprises a static pressure cavity provided below the main air duct, an air inlet opening is formed in the main air duct and communicates with the static pressure cavity, and the static pressure cavity communicates with the opening in the roof of the passenger compartment and / or the air inlet of the internal equipment.

[0009] Further, an air supply damper is installed at the air inlet for adjusting the air supply amount.

[0010] Further, two air inlets are provided, and an air inlet duct is installed at each air inlet, the opening of the guest room roof and the air inlet of the built-in equipment are located in the middle of the two air inlet ducts, and the air inlet duct is a bent pipe that is bent towards the opening in the middle and the air inlet of the built-in equipment.

[0011] Further, the static pressure chamber is surrounded by a layer of heat insulation material, and the upper and lower ends of the layer of heat insulation material are respectively sealed and fixed on the lower surface of the main air duct and the guest room roof.

[0012] Further, the built-in equipment is a television, and the television has an air inlet at the top of the television shell and air inlets on both sides of the shell.

[0013] Another technical solution of the present application is:

[0014] A rail vehicle door area air supply control method, an air supply damper is installed in the door area air supply channel for controlling the air supply amount, and the method specifically comprises the following steps:

[0015] S1, detecting the actual temperature Tn of the door area and comparing it with the target temperature Ts;

[0016] S2, dynamically adjusting the opening degree of the air supply damper according to the difference ATn between the actual temperature Tn and the target temperature Ts.

[0017] Further, in the above step S2, when the difference ATn between the actual temperature Tn and the target temperature Ts is equal to or greater than the set temperature ATns, the opening degree of the air supply damper is adjusted to the maximum set opening degree Amax;

[0018] When the difference ATn between the actual temperature Tn and the target temperature Ts is 0℃, the opening degree of the air supply damper is adjusted to the minimum set opening degree Amin;

[0019] When the difference ATn between the actual temperature Tn and the target temperature Ts is between the first set temperature ATns and 0℃, the difference ATn is divided into one or several gears, each gear corresponds to an opening degree A of the air supply damper, and according to the gear corresponding to the difference ATn, the air supply damper is adjusted to the corresponding opening degree A.

[0020] Further, in step S2, it also includes detecting the outdoor temperature Tw and correcting the opening degree A of the air supply damper according to the difference ATw between the outdoor temperature Tw and the target temperature Ts.

[0021] Further, when the difference ATw between the outdoor temperature Tw and the target temperature Ts is 0℃, the original opening degree A of the air supply damper is kept unchanged;

[0022] When the difference ΔTw between the outside temperature Tw and the target temperature Ts is greater than 0℃, the opening A of the air supply damper is increased by the set angle Aws for each increase of the set temperature Δtws.

[0023] Further, in step S2, a step of detecting a door switch signal and correcting the opening A of the air supply damper according to the door switch signal is further included.

[0024] Further, when the door closing signal is received, the opening A of the original air supply damper is kept unchanged.

[0025] When the door opening signal is received, the opening A of the air supply damper is increased by the set angle Ads.

[0026] Another technical solution of the present application is:

[0027] A door area air supply control device for a rail vehicle, comprising:

[0028] A detection module for detecting the actual temperature Tn and the target temperature Ts of the door area.

[0029] A control module for dynamically adjusting the opening A of the air supply damper according to the difference ΔTn between the actual temperature Tn and the target temperature Ts.

[0030] Further, the control module further includes an outside temperature correction module and a door state correction module for correcting the opening A of the air supply damper according to the outside temperature and / or the door switch signal.

[0031] In summary, the door area air supply system, the air supply control method and the control device of the present application have the following advantages compared with the prior art:

[0032] (1) The present application uses the air supply port on the interior equipment installed in the door area and the gap between the passenger compartment roof and the interior equipment to provide air processed by the air conditioning unit for the door area alone, which realizes invisible air supply, optimizes the air supply environment of the passenger compartment door area, greatly improves the door area air supply effect, makes the temperature of each area in the passenger compartment more uniform, improves the riding comfort, and solves the problem that when the current rail vehicle uses invisible air supply, the invisible air supply duct cannot be arranged in the door area due to the existence of door mechanisms and door controllers and other equipment, resulting in a large temperature difference between the door area passenger compartment and other areas in the car compartment, affecting the riding comfort of passengers.

[0033] (2) The present application optimizes the existing interior structure to realize invisible air supply for the door area alone, and does not need to separately set an air supply machine, so that the structure of the air supply system is simpler, and the interior structure in the car compartment does not need to be greatly modified, and the cost is low.

[0034] (3) The present application uses the built-in equipment installed in the door area to send air, directly leads the air in the main air duct to the built-in equipment below, has a short air sending distance, and has high energy utilization rate of the processed air.

[0035] (4) The present application separately monitors the temperature of the door area, compares it with the target temperature, adjusts the opening degree of the air supply valve according to the difference between the actual temperature in the door area and the target temperature, adjusts the air supply amount of the door area, and further controls the temperature of the door area, so as to realize accurate control of the temperature of the door area.

[0036] (5) The present application introduces the outside temperature and the door opening and closing state into the door area temperature control, makes the door area temperature control more reasonable, the door area temperature control more accurate, and further improves the comfort of riding. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings are included as part of the present application to provide a further understanding of the present application, the illustrative embodiments of the present application and their descriptions serve to explain the present application, but do not constitute improper limitations on the present application. Obviously, the drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0038] Figure 1 is a sectional structure schematic view of the door area air supply system of the rail vehicle of the present application;

[0039] Figure 2 is a local structure schematic view of the door area air supply system of the rail vehicle of the present application;

[0040] Figure 3 is Figure 2 A-A sectional view of

[0041] Figure 4 is a sectional view of the television structure of the present application;

[0042] Figure 5 is a flow chart of the air supply control method of the present application.

[0043] As shown in Figures 1 to 5 , the main air duct 1, the passenger room top plate 2, the branch air duct 3, the passenger room side top plate 4, the invisible air supply port 5, the television 6, the gap 7, the opening 8, the air inlet 9, the air supply port 10, the static pressure cavity 11, the air inlet 12, the heat insulation material layer 13, the air inlet guide pipe 14, the air supply valve 15, the screen 16.

[0044] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0045] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to explain the present application but not to limit the scope of the present application.

[0046] As shown in Figure 1 and Figure 2 , the present application provides a track vehicle door area air supply system, which comprises a main air duct 1 for supplying air to a passenger room, an air inlet of the main air duct 1 is communicated with an air outlet of an air conditioning unit (not shown in the figure), and the main air duct 1 is installed in a central area of a space above a passenger room roof 2. In other areas except the door area, a plurality of branch air ducts 3 are connected to both sides of the main air duct 1, the branch air ducts 3 are communicated with invisible air inlets 5 arranged on a passenger room side roof 4, and air is supplied to the passenger room area from both sides of the passenger room. In the area of the door area, i.e. in the area where the branch air duct 3 cannot be installed on the passenger room side roof 4, the air is supplied to the passenger room by the built-in equipment installed in the door area. In the present embodiment, the built-in equipment preferably uses a television set 6 installed in the door area.

[0047] In the present embodiment, the main air duct 1 is connected with a door area air supply channel, and then connected with the television set 6 installed in the door area of the passenger room through the door area air supply channel, so as to introduce the air in the main air duct 1 into the television set 6 and then supply the air to the passenger room through the air inlets on the television set 6. When the television set 6 is installed, there is an installation gap 7 between the television set 6 and the passenger room roof 2, and an opening 8 is opened on the passenger room roof 2 corresponding to the television set 6. The air in the main air duct 1 is introduced to the space between the television set 6 and the passenger room roof 2 through the opening 8 on the passenger room roof 2, and then supplied to the passenger room through the gap 7 between the television set 6 and the passenger room roof 2. The gap 7 exists around the top of the television set 6, and the air can be supplied to the passenger room from four directions through the gap 7, so that the air supply is more uniform. Of course, for the structure that the air inlets cannot be arranged on the built-in equipment, the air can be supplied only through the installation gap 7 between the built-in equipment and the passenger room roof 2.

[0048] Specifically, as shown in Figure 3 and Figure 4 , an air inlet 9 and an air inlet 10 for supplying air to the passenger room are arranged on the shell of the television set 6, the air inlet 9 is arranged on the shell at the top of the television set 6, the air inlet 9 is located in the middle of the opening 8, and the air inlets 10 are arranged on the shells on both sides, the air inlets 10 can adopt a hole plate structure, or can adopt a strip slit structure as shown in Figure 3 and Figure 4 . In order to facilitate passengers to watch the television, the shell of the television set 6 is trapezoidal with the top wide and the bottom narrow, and a screen 16 of the television set 6 is arranged on each of the two inclined surfaces, the screen 16 faces the direction of the passenger room, and the air inlets 10 are arranged on the shells on both sides of the screen 16, i.e. face the direction of the door.

[0049] The air in the main air duct 1 processed by the air conditioning unit is in the door area, a part of the air is introduced into the television 6 through the air inlet 9 on the shell of the television 6, and is sent to the guest room through the air outlet 10 on both sides of the television 6. A part of the air passes through the opening 8 on the guest room ceiling 2, and is sent to the guest room through the gap 7 between the shell of the television 6 and the guest room ceiling 2.

[0050] As shown in Figure 1 and Figure 2 In this embodiment, the air supply channel connecting the main air duct 1 and the television 6 includes a static pressure cavity 11 arranged below the main air duct 1, an air inlet 12 is formed in the lower wall plate of the main air duct 1 and communicates with the static pressure cavity 11, and the static pressure cavity 11 communicates with the opening 8 of the guest room ceiling 2 and the air inlet 9 of the television 6 shell. The air in the main air duct 1 enters the static pressure cavity 11 before entering the television 6, and the static pressure cavity 11 is used to buffer and fully mix the air flowing out of the main air duct 1, so that the air sent into the television 6 is more uniform, which is beneficial to improve the door area air supply effect and make the air supply more uniform, and improve the riding comfort. Moreover, the air in the main air duct 1 is directly introduced into the television 6 below through the formed air inlet 12, which is beneficial to shorten the air supply distance, the energy utilization rate of the processed air is higher, and the air supply is more stable and uniform.

[0051] In this embodiment, the static pressure cavity 11 utilizes the space between the main air duct 1 and the guest room ceiling 2, which is surrounded by a layer of heat insulation material 13, which is beneficial to reduce the cost. The heat insulation material layer 13 is arranged outside the air inlet 12, and the static pressure cavity 11 can be square or circular, as long as the air inlet 12 is surrounded, the upper and lower ends of the heat insulation material layer 13 are respectively sealed and fixed on the lower surface of the main air duct 1 and the guest room ceiling 2. The heat insulation material layer 13 is preferably made of foam, and the upper and lower ends can be fixed on the lower surface of the main air duct 1 and the guest room ceiling 2 by means of glue. The foam can also be compressed during installation to tightly press the foam between the lower surface of the main air duct 1 and the guest room ceiling 2 to form the static pressure cavity 11.

[0052] In this embodiment, the air inlet 12 is provided with two air inlets 12, which are arranged on both sides of the television 6 in the longitudinal direction, that is, the opening 8 of the guest room ceiling 2 and the air inlet 9 of the television 6 are located in the middle of the two air inlets 12, and an air inlet guide pipe 14 is installed at each air inlet 12. In order to better introduce the air in the main air duct 1 to the opening 8 of the guest room ceiling 2 and the air inlet 9 of the television 6 in the middle, preferably, the air inlet guide pipe 14 is a bend pipe and is bent towards the opening 8 in the middle and the air inlet 9 of the television 6.

[0053] The air supply system of the door area first guides the air in the main air duct 1 into the static pressure cavity 11 formed between the main air duct 1 and the room top plate 2 through two air guide conduits 14, and then the air treated by the air conditioning unit is introduced into the installation gap 7 between the room top plate 2 and the shell of the TV set 6 through the openings 8 on the room top plate 2 below the static pressure cavity 11, and is supplied to the room around the TV set 6 through the installation gap 7, and the other part of the air is introduced into the interior of the TV set 6 through the air inlet 9 on the shell of the TV set 6 below the static pressure cavity 11, and is supplied into the room through the air outlets 10 on the two sides of the shell of the TV set 6.

[0054] In order to adjust the air supply amount to the door area and control the temperature of the door area, an air supply damper 15 for adjusting the air supply amount is installed at each air guide inlet 12, the air supply damper 15 is an electric damper, and the control device is integrated in the controller of the air conditioning unit.

[0055] The air supply system of the door area provides the air treated by the air conditioning unit to the door area through the air outlets 10 on the built-in equipment such as the TV set 6 installed in the door area and the installation gap 7 between the room top plate 2 and the built-in equipment, optimizes the air supply environment of the door area of the room, greatly improves the air supply effect of the door area, makes the temperature of each area in the room more uniform, improves the riding comfort, solves the problem that, when the air supply is in the form of invisible air supply, the invisible air supply duct cannot be arranged in the door area due to the existence of the door mechanism and the door controller and other equipment, the temperature difference between the door area of the room and other areas in the car body is large, and the riding comfort of passengers is affected. In addition, the air supply system realizes the form of invisible air supply for the door area by optimizing the existing built-in structure, does not need to separately set an air supply machine, makes the structure of the air supply system simpler, and does not need to greatly transform the structure in the car body, and the cost is low.

[0056] The application also provides a control method for the air supply of the door area of the rail vehicle, and the control method specifically comprises the following steps:

[0057] S1, detecting the actual temperature Tn of the door area and comparing the actual temperature Tn with a target temperature Ts;

[0058] In order to detect the actual temperature Tn of the door area, a temperature sensor is installed at the air return inlet of the door area, and the target temperature Ts is pre-stored in the controller of the air conditioning unit, the target temperature Ts is the target temperature of the room, and is not set for the door area alone, so as to ensure that the temperatures of each area in the whole room are consistent.

[0059] S2, dynamically adjusting the opening A of the air supply damper 15 according to the difference ATn between the detected actual temperature Tn and the target temperature Ts, and the opening A is a basic opening.

[0060] Two air supply dampers 15 are arranged between the main air duct 1 and the static pressure chamber 11, and the opening degrees of the two air supply dampers 15 are kept consistent and controlled simultaneously to simplify the control method.

[0061] Specifically, in step S2, when the difference ATn between the actual temperature Tn and the target temperature Ts is equal to or greater than the set temperature ATns, the opening degree of the air supply damper 15 is adjusted to the maximum set opening degree Amax to ensure that the door area obtains the maximum air supply amount and the temperature of the door area is rapidly reduced. In this embodiment, preferably, the first set temperature ATns is 6°C, and the maximum set opening degree Amax is 90°.

[0062] When the difference ATn between the actual temperature Tn and the target temperature Ts is 0°C, i.e., the actual temperature Tn of the door area reaches the target temperature Ts, the opening degree of the air supply damper 15 is adjusted to the minimum set opening degree Amin, and at this time, only the basic air supply amount required in the passenger compartment needs to be maintained. When the actual temperature Tn is less than the target temperature Ts, the opening degree of the air supply damper 15 can also be kept at the minimum set opening degree Amin, or the air supply damper 15 can be directly closed. Preferably, the minimum set opening degree Amin is 30°.

[0063] When the difference ATn between the actual temperature Tn and the target temperature Ts is between the set temperature ATns (i.e., 6°C) and 0°C, the difference ATn is divided into one or several gears, each gear corresponding to an opening degree A of the air supply damper 15, and according to the gear corresponding to the difference ATn, the air supply damper 15 is adjusted to the corresponding opening degree A, and at this time, the opening degree A is between the maximum set opening degree Amax and the minimum set opening degree Amin, i.e., between 90° and 30°.

[0064] In this embodiment, two control modes are provided:

[0065] The first mode is to divide the difference ATn between 6°C and 0°C into one intermediate gear, which can be set to 3°C, and the opening degree A of the air supply damper 15 corresponding to the gear is 60°. That is, the opening degree of the air supply damper 15 is only set to three gradients, 90°, 60°, and 30°, and this mode is beneficial to simplify the control method and reduce the number of component rotations of the air supply damper 15, which is beneficial to ensure the reliability of the air supply damper 15 during the operation cycle of the vehicle.

[0066] The second mode is to divide the difference value ΔTn between 6℃ and 0℃ into multiple intermediate gears, each of which corresponds to an opening A of the air supply damper 15. Preferably, the opening A of the air supply damper 15 is reduced by a set angle for each 0.5℃ reduction of the difference value ΔTn, and more preferably, the set temperature is 0.5℃ and the set angle is 5°, that is, the intermediate gears are set to 5.5℃, 5℃, 4.5℃, 4℃, and so on, and the opening A of the air supply damper 15 is reduced to 85°, 80°, 75°, 70°, and so on, respectively. That is, the opening A of the air supply damper 15 is reduced by 5° for each 0.5℃ reduction of the difference value ΔTn. Of course, the set temperature can also be 1℃, 1.5℃, 2℃, 2.5℃, and so on, and the opening A of the air supply damper 15 is adjusted accordingly. This mode has higher temperature control accuracy.

[0067] Since the door area is greatly affected by the outside temperature, in step S2, the outside temperature Tw is also detected, and based on the difference value ΔTw between the outside temperature Tw and the target temperature Ts, the opening of the air supply damper 15 is further corrected based on the above basic opening to fine-tune the opening of the air supply damper 15.

[0068] Specifically, when the difference value ΔTw between the outside temperature Tw and the target temperature Ts is 0℃, the original opening of the air supply damper 15 is maintained, that is, the above opening A is maintained.

[0069] When the difference value ΔTw between the outside temperature Tw and the target temperature Ts is greater than 0℃, the opening of the air supply damper 15 is increased by a set angle Aws for each 1℃ increase of the difference value ΔTw. The set angle Aws is preferably 2°, 4°, or 6°, and the selection of the set angle Aws can be determined according to the change of the outside temperature. For coastal areas where the outside temperature changes more smoothly, a control mode with a small temperature interval can be selected, that is, the set angle Aws is 1℃, and for inland and plateau areas where the outside temperature changes more greatly, a control mode with a large temperature interval can be selected, that is, the set angle Aws is 3℃, which can ensure the accuracy of temperature control and simplify the control mode.

[0070] For subway vehicles, the opening and closing of the doors also greatly affects the temperature of the door area. In the present embodiment, more preferably, in step S2, the door opening and closing signal is also detected, and the opening of the air supply damper 15 is corrected based on the door opening and closing signal to further fine-tune the opening of the air supply damper 15. The door opening and closing signal is sent by the central console in the driver's cab to the control device.

[0071] When the door closing signal is received, the original opening A of the air supply damper 15 is maintained.

[0072] When the door opening signal is received, the opening degree A of the air supply damper 15 is increased by a set angle Ads, which is preferably 30°, on the basis of the above basic opening degree. The purpose is to form an air curtain to prevent the air with large temperature difference from the outside from entering the vehicle and causing fluctuations in the temperature of the passenger compartment door area, and to quickly adjust the air temperature in the door area to the target temperature Ts.

[0073] The control method monitors the temperature of the door area in real time, separately monitors the temperature of the door area, and compares it with the target temperature Ts. The opening degree of the air supply damper 15 is adjusted according to the difference between the actual temperature Tn in the door area and the target temperature Ts. At the same time, the temperature outside the vehicle and the state of the vehicle door are introduced into the control of the temperature of the door area, and the air supply amount of the door area is comprehensively adjusted, so as to reasonably control the temperature of the door area, realize precise control of the temperature of the door area, and further improve the comfort of riding.

[0074] The application also provides an air supply adjusting device, which comprises:

[0075] A detection module is configured to detect the actual temperature Tn of the door area and the target temperature Ts.

[0076] A control module is configured to dynamically adjust the opening degree A of the air supply damper 15 according to the difference ATn between the actual temperature Tn and the target temperature Ts.

[0077] The control module further comprises an outside temperature correction module and a door state correction module for correcting the opening degree A of the air supply damper according to the temperature outside the vehicle and / or the door opening signal.

[0078] The above description is only the preferred embodiment of the application and does not limit the application in any form. Although the application has been disclosed as above, it is not intended to limit the application. Any skilled person in the art can make some changes or modifications to the above-mentioned technical content without departing from the scope of the technical solution of the application, and any simple modification, equivalent change and modification of the above-mentioned embodiments, which do not depart from the technical solution of the application, are still within the scope of the application.

Claims

1. A rail vehicle door zone air supply system comprising a passenger compartment air supply main duct, characterized in that: In areas other than the door zone, multiple branch air ducts are connected to both sides of the main air duct. The branch air ducts are connected to air outlets installed on the side ceiling of the guest room, supplying air from both sides of the guest room to the guest room area. In the door zone area, the main air duct is connected to the door zone air supply channel, which is connected to the television set inside the guest room door zone. The top of the television set has an air inlet, and air outlets for supplying air into the guest room are opened on both sides of the television set. Air in the main air duct is introduced into the television set through the air supply channel and delivered to the guest room through the air outlets on the television set. Air in the main air duct is also delivered to the guest room through the gap between the opening on the guest room ceiling and the television set. The door area air supply duct includes a static pressure chamber located below the main air duct. An air inlet communicating with the static pressure chamber is provided on the main air duct. The static pressure chamber is connected to the opening in the passenger room ceiling and the air inlet of the television. Two air inlets are provided, and an air duct is installed at each air inlet. The opening in the passenger room ceiling and the air inlet of the television are located in the middle of the two air ducts. The air duct is a curved pipe that bends towards the middle opening and the air inlet of the television.

2. The rail vehicle door zone air supply system of claim 1, wherein: An air supply valve for adjusting the air supply volume is installed at the air inlet.

3. The rail vehicle door zone air supply system of claim 1, wherein: The static pressure chamber is surrounded by a layer of thermal insulation material, with the upper and lower ends of the thermal insulation material layer sealed and fixed to the lower surface of the main air duct and the ceiling of the passenger room, respectively.

4. A rail vehicle door zone air supply control method of a rail vehicle door zone air supply system according to any one of claims 1 to 3, characterized in that, An air supply valve for controlling the air volume is installed in the door zone air supply duct, specifically including the following steps: S1. Detect the actual temperature Tn of the gate area and compare it with the target temperature Ts; S2. Dynamically adjust the opening of the air supply valve according to the difference △Tn between the actual temperature Tn and the target temperature Ts; Step S2 also includes detecting the outside temperature Tw and adjusting the air supply valve opening A based on the difference ΔTw between the outside temperature Tw and the target temperature Ts. Specifically, when the difference ΔTw between the outside temperature Tw and the target temperature Ts is 0°C, the original air supply valve opening A remains unchanged. When the difference ΔTw between the outside temperature Tw and the target temperature Ts is greater than 0°C, the air supply valve opening A is increased by a set angle Δws for each increase in the set temperature Δtws. For coastal areas where the outside temperature changes steadily, the set temperature Δtws temperature interval is small; for inland and plateau areas where the outside temperature changes more significantly, the set temperature Δtws temperature interval is large. Step S2 also includes detecting the door opening / closing signal and correcting the air supply valve opening degree A according to the door opening / closing signal; specifically, when a door closing signal is received, the original air supply valve opening degree A is kept unchanged; when a door opening signal is received, the air supply valve opening degree A is adjusted to increase the set angle Ads.

5. The air supply control method for the door area of ​​a rail vehicle according to claim 4, characterized in that: In step S2 above, when the difference between the actual temperature Tn and the target temperature Ts is equal to or greater than the set temperature Δtns, the opening of the air supply valve is adjusted to the maximum set opening Amax. When the difference △Tn between the actual temperature Tn and the target temperature Ts is 0℃, the opening degree of the supply air damper is adjusted to the minimum set opening degree Amin; When the difference △Tn between the actual temperature Tn and the target temperature Ts is between the first set temperature △tns and 0℃, the difference △Tn is divided into one or several gears, each gear corresponding to an opening degree A of the supply air damper, and the supply air damper is adjusted to the corresponding opening degree A according to the gear corresponding to the difference △Tn.

6. A railcar door zone air supply control device that implements the railcar door zone air supply control method according to claim 4 or 5, characterized by Comprise: a detection module for detecting the actual temperature Tn and the target temperature Ts of the door area; a control module for dynamically adjusting the opening degree A of the supply air damper according to the difference △Tn between the actual temperature Tn and the target temperature Ts.

7. A rail vehicle door zone air supply control device according to claim 6, characterized in that: The control module further comprises an outside temperature correction module and a door state correction module for correcting the opening degree A of the supply air damper according to the outside temperature and / or the door opening and closing signal.

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