Air duct system for passenger car of suburban rail train and suburban rail train

Abstract

An air duct system for a passenger car of a suburban rail train and a suburban rail train, the air duct system for a passenger car of a suburban rail train being arranged on the top of a passenger car of a suburban rail train. The air duct system for a passenger car of a suburban rail train comprises a plurality of air duct sections, the plurality of air duct sections being successively connected end to end in the length direction of the suburban rail train; each air duct section comprises a main body, air supply pipes (4) and air return pipes (5); each main body comprises an air supply cavity (19) and air return cavities (20), the air return cavities (20) being arranged on two sides of the upper part of the air supply cavity (19); the air supply pipes (4) lead to the air supply cavity (19), and the air return pipes (5) lead to the air return cavities (20); first air supply outlets (12) of the air supply pipes (4) are rotatably arranged in the side walls of the upper part of the passenger car of the suburban rail train, and air return inlets (13) of the air return pipes (5) are arranged in the bottom of the passenger car of the suburban rail train; air conditioning units are provided at positions where the plurality of air duct sections are connected to each other, the air conditioning units being communicated with the air return cavities (20) and the air supply cavities (19). The air duct system for a passenger car of a suburban rail train optimizes the structure of the air supply cavities (19) and the air return cavities (20), so as to conveniently supply air and promote airflow circulation, thus improving riding comfort.

Description

Air duct system for passenger compartment of urban train and urban train

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application with application number 202311255307.1 filed with the Patent Office of China on September 27, 2023, entitled “A duct system for the passenger compartment of an urban train and an urban train”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of urban trains, and in particular to an air duct system for a passenger compartment of an urban train and the urban train. Background Art

[0004] Urban rail, also known as urban rail transit, is an urban public rail transit system based on railway technology and equipment that operates specifically between neighboring cities and urban areas. It is a fast, large-capacity, bus-like public transportation method that connects urban areas with suburbs and satellite towns or urban circles within dozens of kilometers or even larger areas around the city.

[0005] Intercity trains are a new type of rail transit tailored for urban rail transit. They lie somewhere between urban rail transit (subways, light rail) and intercity high-speed rail. Existing rail transit options like subways and light rail are limited by operating speeds and are no longer able to meet the mobility needs of urban residents. Compared to urban rail transit, intercity trains feature larger average station spacing, larger passenger capacity, higher target speeds, higher travel speeds, and moderate traffic density.

[0006] The passenger compartment of a metropolitan train is where passengers board and exit the train. Existing metropolitan trains have simple air duct structures, resulting in poor internal airflow organization and inadequate air circulation. Furthermore, they fail to consider the individual needs of passengers regarding perceived temperature. For example, existing air conditioning systems use a top grille with high airflow and unadjustable volume, blowing directly onto passengers' heads, which can easily cause headaches and a poor riding experience.

[0007] Therefore, it is necessary to design an air duct system for the passenger compartment of a metropolitan train to solve the above problems.

[0008] Application Contents

[0009] In view of this, in order to overcome the defects of the prior art, the present invention provides an air duct system for the passenger compartment of an urban train and an urban train, which effectively solves the problems of the existing air duct structure being simple, the air flow organization inside the vehicle being poor, the inability to achieve sufficient circulation of the air flow, and the inability to meet the passengers' personalized needs for the perceived temperature.

[0010] According to a first aspect of the present invention, an air duct system for a passenger compartment of an urban train is provided, wherein the air duct system for the passenger compartment of the urban train is arranged at the top of the passenger compartment of the urban train, wherein the air duct system for the passenger compartment of the urban train comprises a plurality of air duct sections, and the plurality of air duct sections are connected in sequence end to end along the length direction of the urban train; each air duct section comprises a main body, an air supply duct and a return air duct, the main body comprises an air supply cavity and a return air cavity, the return air cavity is arranged on both sides of the upper part of the air supply cavity, the air supply duct is connected to the air supply cavity, and the return air duct is connected to the return air cavity; the first air supply port of the air supply duct is rotatably arranged on the side wall of the upper part of the passenger compartment of the urban train, and the return air port of the return air duct is arranged at the bottom of the passenger compartment of the urban train; an air-conditioning unit is arranged at a position where the plurality of air duct sections are connected to each other, and the air-conditioning unit is connected to the return air cavity and the air supply cavity.

[0011] Preferably, the passenger compartment of the urban train includes a plurality of seats, and the plurality of seats are arranged in two rows on both sides of the lower part of the passenger compartment of the urban train, and a passage is formed between the two rows of seats. The first air supply outlet is arranged at the upper part of the seat, and the first air supply outlet is arranged toward the position of the passage; the return air outlet is arranged at the bottom of the seat.

[0012] Preferably, the first air outlet is arranged in the upper part of the passenger compartment of the urban train so that the air volume can be adjusted through an adjustment component. The adjustment component includes a drive motor, a drive rod and an adjustment blade. The adjustment blade is arranged on the drive rod. The drive motor drives the drive rod to rotate so that the adjustment blade rotates.

[0013] Preferably, the air supply chamber is located in the middle of the top of the passenger compartment of the urban train, and a second air supply outlet is provided at the bottom of the air supply chamber, and the second air supply outlet is arranged at the bottom of the air supply chamber so that the air volume can be adjusted by an adjustment component; the adjustment component includes a wind shield, an adjustment bolt, an adjustment spring and an adjustment nut, the adjustment spring is sleeved on the adjustment bolt, and the wind shield is connected to the air supply chamber through the adjustment bolt and the adjustment nut, and the wind shield is used to block the second air supply outlet, and the distance between the wind shield and the second air supply outlet is adjusted by the adjustment bolt and the adjustment nut.

[0014] Preferably, a first connection port and a second connection port are provided on the top of the main body, the first connection port is connected to the air supply chamber, the second connection port is connected to the return air chamber, and the first connection port and the second connection port are both connected to the air-conditioning unit; the cross-section of the main body is formed into a rectangle, the cross-section of the air supply chamber is formed into a convex shape with a high middle part and low two sides, the number of the return air chambers is two, and the two return air chambers are respectively arranged on both sides of the upper part of the air supply chamber, and the top surface of the air supply chamber and the top surface of the return air chamber are smoothly arranged.

[0015] Preferably, the two side surfaces of the air supply cavity are respectively aligned with the side surfaces of the two return air cavities; the number of the air supply ducts and the return air ducts is multiple, and the multiple air supply ducts are arranged on the two side surfaces of the air supply cavity, and the multiple return air ducts are respectively connected to the side surfaces of the two return air cavities.

[0016] Preferably, the number of the first air supply outlet and the number of the return air outlet are both plural.

[0017] Preferably, the passenger compartment of the urban train further includes luggage racks, and the number of the luggage racks is multiple, and the multiple luggage racks are arranged in two rows on top of the two rows of seats; the first air supply port of the air supply duct is arranged at the bottom of the luggage rack.

[0018] Preferably, the urban train includes a plurality of passenger compartments connected end to end along the length direction of the urban train, each passenger compartment includes a first air duct section, a second air duct section and a third air duct section, the first air duct section is arranged at the first end of the second air duct section, and the third air duct section is arranged at the second end of the second air duct section; the top of the first air duct section and the top of the second air duct section are provided with a first connection port and a second connection port, the first connection port is connected to the supply air chamber, the second connection port is connected to the return air chamber, and the first connection port and the second connection port are both connected to the air-conditioning unit; a part of the return air chamber of the second air duct section is connected to the return air chamber of the first air duct section, a part of the supply air chamber of the second air duct section is connected to the supply air chamber of the first air duct section, another part of the return air chamber of the second air duct section is connected to the return air chamber of the second air duct section, and another part of the supply air chamber of the second air duct section is connected to the supply air chamber of the second air duct section.

[0019] According to a second aspect of the present invention, there is provided an urban train, wherein the urban train includes the above-mentioned air duct system for a passenger compartment of the urban train.

[0020] According to the air duct system for the passenger compartment of the urban train of the present invention, by optimizing the structure of the air supply chamber and the return air chamber, sufficient circulation of air flow is achieved, and air can be supplied efficiently and conveniently. At the same time, since the first air supply port is rotatably arranged on the side wall of the passenger compartment of the urban train, passengers can adjust the direction of the air outlet and the size of the air volume according to their own needs, thereby improving the riding comfort; by arranging the air duct system for the passenger compartment of the urban train in the passenger compartment of the urban train, the circulation of air flow in the passenger compartment is promoted, thereby providing passengers with a comfortable riding environment.

[0021] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0023] FIG1 is a schematic structural diagram of an air duct system for a passenger compartment of a metropolitan train according to an embodiment of the present invention;

[0024] FIG2 shows a top view of an air duct system for a passenger compartment of a metropolitan train according to an embodiment of the present invention;

[0025] FIG3 is a schematic diagram showing a partial structure of a first air duct segment according to an embodiment of the present invention;

[0026] FIG4 shows a schematic diagram showing the wind flow direction inside the passenger compartment and the structure of the passenger compartment according to the first embodiment of the present invention;

[0027] FIG5 shows a schematic diagram showing the wind flow direction inside the passenger compartment and the structure of the passenger compartment according to a second embodiment of the present invention;

[0028] FIG6 shows a partial cross-sectional view of a main body according to an embodiment of the present invention;

[0029] FIG7 shows another partial cross-sectional view of the main body according to an embodiment of the present invention;

[0030] FIG8 is a schematic structural diagram of an adjustment assembly according to an embodiment of the present invention;

[0031] FIG9 shows another schematic structural diagram of an adjustment assembly according to an embodiment of the present invention;

[0032] FIG10 is a schematic structural diagram of a rotating assembly according to an embodiment of the present invention;

[0033] FIG11 is a schematic diagram showing the wind flow direction of the air duct system for the passenger compartment of a metropolitan train according to an embodiment of the present invention;

[0034] FIG12 shows a schematic structural diagram of an adjustment assembly and a second air outlet according to an embodiment of the present invention.

[0035] Figure markings: 1-first air duct section; 2-second air duct section; 3-third air duct section; 4-supply air duct; 5-return air duct; 6-first connecting port; 7-second connecting port; 8-center line of vehicle body; 9-door; 10-luggage rack; 11-seat; 12-first air supply outlet; 13-return air outlet; 14-second air supply outlet; 1401-wind deflector; 1402-adjusting spring; 1403-adjusting bolt; 1404-adjusting nut; 15-platform; 16-receiver; 17-adjusting assembly; 1701-drive motor; 1702-drive rod; 1703-adjusting fan blade; 1704-side hole; 1801-spherical head; 1802-fixing clamp; 19-supply air chamber; 20-return air chamber; 21-vehicle body. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0037] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0038] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0039] In the description of the embodiments of the present application, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0040] According to a first aspect of the present invention, an air duct system for the passenger compartment of an urban train is provided, as shown in Figures 1 to 12. The air duct system for the passenger compartment of an urban train is used for an urban train and can provide a channel for the inflow and outflow of air-conditioning air for the passenger compartment of the urban train. By optimizing the flow field, efficient inflow and outflow of air-conditioning air is achieved. Air is supplied from the top through small holes in the middle top plate. The air supply speed is low, the air flow is uniform, and there is no blowing feeling on the head. At the same time, an independent adjustable air supply port is set for each seat, taking into account the personalized needs of different passengers for the perceived temperature, thereby improving the passenger riding experience. The air duct system for the passenger compartment of the urban train can be set on the top of the urban train and the air is discharged from the top. The air duct system for the passenger compartment of the urban train may include multiple air duct sections and air-conditioning units (not shown) connecting these air duct sections.

[0041] In the following description, the detailed structure of the air duct section of the air duct system for the passenger compartment of the urban train will be described in detail with reference to FIG. 1 to FIG. 12 .

[0042] As shown in Figures 1 to 7, in an embodiment, a plurality of air duct sections are connected end to end in sequence along the length direction of the urban train, and can be arranged on the top of the passenger compartment of the urban train. A plurality of connectors are provided on both sides of the plurality of air duct sections along the length direction of the urban train, and the plurality of air duct sections are installed on the body 21 of the urban train through the plurality of connectors. The connectors can be, for example, long strip structures with connection positions at the ends extending to both sides, and the connection method can be, for example, using fastening bolts or riveting. Specifically, each air duct section includes a main body, an air supply duct 4 and a return air duct 5. The main body can be formed into an approximately rectangular structure with a cavity in the middle. The main body serves as the main structure of each air duct section, is used for the flow of air-conditioning air, and realizes the installation of the structure. The plurality of connectors are provided at one end on the main body and connected to the body 21 at the other end. The internal cavity of the main body may include an air supply cavity 19 and a return air cavity 20. The return air cavity 20 is arranged on both sides of the upper part of the air supply cavity 19. The air supply duct 4 is connected to the air supply cavity 19, and the return air duct 5 is connected to the return air cavity 20. The air supply cavity 19 is used for the flow in of air-conditioned air, that is, the air-conditioned air flows into the passenger compartment of the urban train through the air supply duct 4. The return air cavity 20 is used for the flow out of air-conditioned air, that is, the air-conditioned air flows out of the passenger compartment of the urban train through the return air duct 5. The air duct system for the passenger compartment of the urban train adjusts the structure of the air supply cavity 19 and the return air cavity 20 and optimizes the layout of the air supply duct 4 and the return air duct 5, thereby adjusting the airflow organization inside the vehicle and realizing full circulation of the airflow.

[0043] As shown in Figures 1 to 7, in an embodiment, the first air supply port 12 of the air supply duct 4 is rotatably arranged on the side wall of the upper part of the passenger compartment of the urban train. Referring to Figures 4 and 5, passengers can manually adjust the angle between the first air supply port 12 and the vertical wall of the passenger compartment of the urban train, thereby adjusting the angle at which the air-conditioned air is blown out to meet the personalized needs of different passengers for perceived temperature. The return air port 13 of the return air duct 5 is arranged at the bottom of the passenger compartment of the urban train. The return air port 13 is located at the bottom and cooperates with the first air supply port 12 located at the top. Preferably, the setting position of the return air port 13 can match the height of the platform 15. The platform 15 is the location for passengers to get on and off the train at the station where the urban train passes. The return air port 13 can be located at the floor inside the vehicle (level with the platform 15, convenient for passengers to get on and off the train), which is beneficial to the air circulation of the entire vehicle, while avoiding the air outlet and return air blowing directly on the passengers, thereby improving comfort.

[0044] The air duct system for the passenger compartment of the urban train also includes an air conditioning unit (not shown). The air conditioning unit is arranged at a position where multiple air duct sections are connected to each other. One air conditioning unit can drive two adjacent air duct sections, achieving efficient air supply while saving layout space and cost. The air conditioning unit is connected to the return air chamber 20 and the supply air chamber 19 at the same time, and is used to provide conditioned air and circulate the air in the passenger compartment of the entire urban train. The air conditioning unit can be, for example, a device commonly used in urban trains in the prior art, and its structure and principle are not described here. The conditioned air provided by the air conditioning unit can be transported to the supply air duct 4 through the supply air chamber 19 and flow into the passenger compartment of the urban train through the first supply air port 12, and then flow into the return air duct 5 through the return air port 13, and enter the return air chamber 20, and finally flow back to the air conditioning unit, completing the circulation of the air flow in the entire passenger compartment.

[0045] Preferably, as shown in Figures 1 to 7, in an embodiment, the passenger compartment of the urban train may include a plurality of seats 11, which are arranged in two rows on both sides of the lower part of the passenger compartment of the urban train, that is, the plurality of seats 11 are arranged on the floor of the passenger compartment of the urban train, and the first air supply vents 12 are arranged above the seats 11 to ensure that the number of the first air supply vents 12 is consistent with the number of seats. Passengers in each seat can adjust the corresponding first air supply vents 12. The return air vents 13 are arranged at the bottom of the seats 11, which can reduce the backflow of air-conditioned air felt by passengers and further improve comfort.

[0046] Preferably, as shown in Figures 8 and 9, in an embodiment, the first air supply port 12 is arranged in the upper part of the passenger compartment of the urban train by adjusting the air volume through the adjustment component 17. Specifically, the side of the main body may be provided with a side hole 1704 for the flow of air-conditioning wind. The adjustment component 17 may include a drive motor 1701, a drive rod 1702 and an adjustment blade 1703, and the adjustment blade 1703 is arranged on the drive rod 1702, and the drive motor 1701 drives the drive rod 1702 to rotate so that the adjustment blade 1703 rotates. When the adjustment blade 1703 rotates, the side hole 1704 can be blocked according to the angle of rotation, and the air volume can be adjusted to meet the personalized needs of different passengers for the perceived temperature.

[0047] Preferably, as shown in FIG8 , in an embodiment, an adjustment button (not shown) is provided on the seat 11 , by which the passenger can control the adjustment assembly 17 and thereby control the air volume. Specifically, the adjustment button is connected to a controller, which can be, for example, a 0-10V voltage output air volume adjustment switch. A receiver 16 can be mounted on the side of the drive motor 1701 , which can be a stepper motor driver or a stepper motor controller. When the receiver 16 receives a signal from the controller, the drive motor 1701 is adjusted, thereby driving the adjustment blades 1703 to rotate, thereby adjusting the air volume.

[0048] Preferably, as shown in Figure 10, in an embodiment, the first air supply port 12 is rotatably provided on the side wall of the upper part of the passenger compartment of the urban train. Specifically, the first air supply port 12 is rotatably provided on the side wall of the upper part of the passenger compartment of the urban train through a rotating assembly. The rotating assembly may include a spherical head 1801 with a through hole in the middle and a fixing clamp 1802 for fixing the spherical head 1801, and the fixing clamp 1802 and the spherical head 1801 are rotatably connected by clearance fit, and the spherical head 1801 is opposite to the first air supply port 12 to achieve the passage of airflow. Passengers can manually rotate the spherical head 1801 to change the direction of the airflow, improve riding comfort, and meet the personalized needs of different passengers for perceived temperature.

[0049] Preferably, as shown in Figures 1 to 7 and 12, in an embodiment, the air supply cavity 19 is located in the middle of the top of the passenger compartment of the urban train, and a second air supply port 14 is provided at the bottom of the air supply cavity 19. The second air supply port 14 is directly connected to the air supply cavity 19 and continuously provides conditioned air for cooling the entire passenger compartment. The second air supply port 14 can be provided at the bottom of the air supply cavity 19 so that the air volume can be adjusted by an adjustment component. Specifically, the second air supply port 14 can be formed as a circular through-hole, through which the conditioned air is blown out; the adjustment component can include a windshield 1401, an adjustment bolt 1403, an adjustment spring 1402, and an adjustment nut 1404. Windshield 1401 can be formed into a plate-like structure with a bend in the middle, with the middle portion of the plate-like structure bent toward the second air supply port 14. Windshield 1401 can be used to block the conditioned air directly blown out from the second air supply port 14, thereby forming a static pressure chamber between windshield 1401 and the second air supply port 14. This changes the direction of the conditioned air, allowing the airflow to be blown out evenly and smoothly along the plate-like structure to the circumference, thereby improving passenger comfort. Adjustment spring 1402 is mounted on adjustment bolt 1403. Both ends of windshield 1401 are connected to the bottom plate of air supply chamber 19 via adjustment bolt 1403 and adjustment nut 1404. One end of adjustment spring 1402 abuts against air supply chamber 19, and the other end abuts against windshield 1401, ensuring stable installation of windshield 1401. Windshield 1401 blocks the second air outlet 14. The operator can adjust the distance between windshield 1401 and the second air outlet 14 by adjusting bolt 1403 and adjusting nut 1404, thereby adjusting the air volume. The closer windshield 1401 is to the second air outlet 14, the smaller the air volume; the farther away, the larger the air volume. The second air outlet 14 serves as a permanent air outlet, ensuring temperature and airflow throughout the passenger compartment.

[0050] Preferably, as shown in Figures 4 to 7, in this embodiment, a first connection port 6 and a second connection port 7 are provided at the top of the main body of the air duct section. The first connection port 6 connects to the supply air chamber 19, and the second connection port 7 connects to the return air chamber 20. Both the first connection port 6 and the second connection port 7 are connected to the air conditioning unit. Here, since the aforementioned one air conditioning unit drives two adjacent air duct sections, two first connection ports 6 are provided, and the two first connection ports 6 respectively connect to the supply air chamber 19 of the two adjacent air duct sections. There are also two second connection ports 7, and the two second connection ports 7 are respectively provided on either side of the first connection port 6. Since there are two return air chambers 20, there are also two second connection ports 7. The size of the second connection port 7 is larger than that of the first connection port 6, which can reduce the wind speed of the return air and improve the heat exchange efficiency of the airflow through the evaporator.

[0051] Preferably, as shown in Figures 4 to 7, in the embodiment, the cross-section of the main body is formed as a rectangle, the cross-section of the air supply chamber 19 is formed as a convex shape with a high middle part and low two sides, and the number of return air chambers 20 is two. The two return air chambers 20 are respectively arranged on both sides of the upper part of the air supply chamber 19. The top surface of the air supply chamber 19 and the top surface of the return air chamber 20 are smoothly arranged, so that the top of the overall main body is a complete plane, which is convenient for subsequent installation and maintenance.

[0052] Preferably, as shown in FIG4 to FIG7, in the embodiment, the two side surfaces of the air supply cavity 19 are respectively aligned with the side surfaces of the two return air cavities 20, so that the two return air cavities 20 and the air supply cavity 19 together form a substantially rectangular cross-section;

[0053] The number of the supply air ducts 4 and the return air ducts 5 can be multiple, and the multiple supply air ducts 4 are provided on both sides of the supply air chamber 19, and the multiple return air ducts 5 are respectively connected to the sides of the two return air chambers 20. The connection method can be, for example, that the sides of the supply air chamber 19 and the return air chamber 20 are both provided with multiple through holes, and the multiple supply air ducts 4 and the multiple return air ducts 5 can be provided with connecting plates on the circumference of the end, and the connecting plates are riveted or threadedly connected to the through holes opened on the side, and the through holes are aligned with the supply air ducts 4 and the return air ducts 5 so that airflow can pass through. However, it is not limited to this, and components such as connecting joints can also be used for connection, and the connection method can be specifically selected according to the environment. Since the side of the return air chamber 20 is higher than the side of the supply air chamber 19 formed in a convex shape, the connection height of the return air duct 5 is higher than that of the supply air duct 4.

[0054] Preferably, as shown in Figures 1 to 11 , in this embodiment, there are multiple first air supply vents 12 and multiple return air vents 13. These multiple first air supply vents 12 and multiple return air vents 13 are evenly distributed throughout the passenger compartment of the intercity train. The number of the multiple first air supply vents 12 can be specifically selected based on the number of seats 11; each seat 11 can be provided with one first air supply vent 12.

[0055] Preferably, as shown in Figures 1, 4, and 5, in an embodiment, the passenger compartment of the urban train further includes a luggage rack 10. There are multiple luggage racks 10, and the multiple luggage racks 10 are arranged in two rows on top of two rows of seats 11; the first air supply port 12 of the air supply duct 4 is arranged at the bottom of the luggage rack 10. The luggage rack 10 is convenient for passengers to place their luggage. In order to prevent the luggage rack 10 from blocking the air conditioning air, the first air supply port 12 of the air supply duct 4 is arranged at the bottom of the luggage rack 10. In addition, the position of the first air supply port 12 is also closer to the head, face, and torso of the passenger, and the passenger can adjust the air volume and angle according to their needs.

[0056] Preferably, as shown in Figures 1 to 11, in an embodiment, a metropolitan train may include multiple passenger compartments connected end to end along the length of the metropolitan train. Doors 9 may be provided between the connected passenger compartments to facilitate passengers getting on and off the train. Each passenger compartment may include a first air duct segment 1, a second air duct segment 2, and a third air duct segment 3. The first air duct segment 1 is provided at the first end of the second air duct segment 2, and the third air duct segment 3 is provided at the second end of the second air duct segment 2. That is, the first air duct segment 1 is located at the beginning of the length of the metropolitan train, and the second air duct segment 2 is located at the end of the length of the metropolitan train. A first connection port 6 and a second connection port 7 are provided at the top of the first air duct section 1 and the top of the second air duct section 2. The first connection port 6 connects to the supply air cavity 19, and the second connection port 7 connects to the return air cavity 20. Both the first connection port 6 and the second connection port 7 are connected to the air conditioning unit. A portion of the return air cavity 20 of the second air duct section 2 connects to the return air cavity 20 of the first air duct section 1, a portion of the supply air cavity 19 of the second air duct section 2 connects to the supply air cavity 19 of the first air duct section 1, another portion of the return air cavity 20 of the second air duct section 2 connects to the return air cavity 20 of the second air duct section 2, and another portion of the supply air cavity 19 of the second air duct section 2 connects to the supply air cavity 19 of the second air duct section 2. In this way, the three air duct sections can be driven by two air conditioning units. Preferably, the vehicle body centerline 8 serves as the centerline of the second duct segment 2. The half of the second duct segment 2 near the first duct segment 1 is driven by one air conditioning unit, and the other half of the second duct segment 2 near the third duct segment 3 is driven by another air conditioning unit. The length of the second duct segment 2 is longer than the first duct segment 1 and the third duct segment 3. Referring to FIG11 , the arrows indicate the direction of airflow in the duct segments. In this way, since two air conditioning units can be respectively located at one-quarter and three-quarters of the length of each passenger compartment, the two duct segments (for example, the first duct segment 1 and half of the second duct segment 2) can be driven evenly, achieving sufficient and efficient airflow.

[0057] Preferably, as shown in FIG4 , in one embodiment, a plurality of seats 11 are formed into two rows, wherein one row may include a single seat 11, and the other row may include two seats 11 arranged side by side. Thus, the first air outlet 12 on the top of the two seats 11 arranged side by side may be provided with two spherical heads 1801, so that two passengers can adjust the airflow independently, thereby improving the flexibility of use.

[0058] Preferably, as shown in FIG. 5 , in the second embodiment, the plurality of seats 11 formed into two rows may each be two seats 11 arranged side by side.

[0059] The air duct system for the passenger compartment of a metropolitan train can correspond to a train car of the metropolitan train. The process of using the air duct system for the passenger compartment of the metropolitan train is as follows: the driver or operator turns on the air conditioning unit, and the air conditioning unit sends new conditioned air through the air supply cavity 19 and the air supply duct 4 into the interior of the passenger compartment. The first air supply port 12 is set on the side wall of the passenger compartment, and the second air supply port 14 is set on the top of the passenger compartment. The second air supply port 14 is a permanent air outlet, and the first air supply port 12 is an outlet with adjustable air volume and angle, which can be adjusted according to passenger needs. The conditioned air flows back to the return air duct 5 through the return air port 13 located at the bottom of the passenger compartment and enters the return air cavity 20, and is finally drawn away by the air conditioning unit.

[0060] The air duct system in the passenger compartment of the urban train achieves full circulation of airflow by optimizing the structure of the air supply cavity and the return air cavity, which can supply air efficiently and conveniently. At the same time, since the first air supply outlet is rotatably set on the side wall of the passenger compartment of the urban train, passengers can adjust the direction of the air outlet and the size of the air volume according to their own needs, thereby improving the riding comfort.

[0061] Furthermore, according to a second aspect of the present invention, a metropolitan train is provided, comprising the above-described metropolitan train passenger compartment air duct system. By installing the above-described metropolitan train passenger compartment air duct system in the metropolitan train passenger compartment, air circulation within the passenger compartment is promoted, thereby providing a comfortable riding environment for passengers.

[0062] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. These modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. An air duct system for a passenger compartment of an urban train, wherein the air duct system for a passenger compartment of an urban train is arranged on the top of the passenger compartment of the urban train, and is characterized in that: The air duct system for the passenger compartment of the urban train comprises: A plurality of air duct sections, wherein the plurality of air duct sections are connected end to end in sequence along the length direction of the urban train; Each air duct section includes a main body, an air supply pipe and an air return pipe, the main body includes an air supply cavity and an air return cavity, the air return cavity is arranged on both sides of the upper part of the air supply cavity, the air supply pipe is connected to the air supply cavity, and the air return pipe is connected to the air return cavity; The first air supply port of the air supply duct is rotatably arranged on the side wall of the upper part of the passenger compartment of the urban train, and the return air port of the return air duct is arranged on the bottom of the passenger compartment of the urban train; An air conditioning unit is arranged at a position where a plurality of the air duct sections are connected to each other, and the air conditioning unit is connected to the return air chamber and the supply air chamber.

2. The air duct system for passenger compartment of a metropolitan train according to claim 1, characterized in that: The passenger compartment of the urban train comprises a plurality of seats, the plurality of seats are arranged in two rows on both sides of the lower part of the passenger compartment of the urban train, a passage is formed between the two rows of seats, the first air supply port is arranged on the upper part of the seats, and the first air supply port is arranged toward the position of the passage; The return air outlet is arranged at the bottom of the seat.

3. The air duct system for passenger compartment of urban train according to claim 2, characterized in that: The first air supply outlet is arranged at the upper part of the passenger compartment of the urban train so that the air volume can be adjusted through an adjusting component. The adjusting component includes a driving motor, a driving rod and an adjusting blade. The adjusting blade is arranged on the driving rod. The driving motor drives the driving rod to rotate so that the adjusting blade rotates.

4. The air duct system for passenger compartment of a metropolitan train according to claim 2, characterized in that: The air supply cavity is located in the middle of the top of the passenger compartment of the urban train, and a second air supply port is arranged at the bottom of the air supply cavity, and the second air supply port is arranged at the bottom of the air supply cavity so that the air volume can be adjusted by an adjustment component; The adjustment assembly includes a wind shield, an adjustment bolt, an adjustment spring and an adjustment nut. The adjustment spring is sleeved on the adjustment bolt. The wind shield is connected to the air supply cavity through the adjustment bolt and the adjustment nut. The wind shield is used to block the second air supply port. The distance between the wind shield and the second air supply port is adjusted by the adjustment bolt and the adjustment nut.

5. The air duct system for passenger compartment of urban train according to claim 1, characterized in that: The top of the main body is provided with a first connection port and a second connection port, the first connection port is connected to the air supply cavity, the second connection port is connected to the air return cavity, and the first connection port and the second connection port are both connected to the air conditioning unit; The cross-section of the main body is formed into a rectangle, the cross-section of the air supply cavity is formed into a convex shape with a high middle part and low two sides, the number of the return air cavities is two, and the two return air cavities are respectively arranged on both sides of the upper part of the air supply cavity, and the top surface of the air supply cavity and the top surface of the return air cavity are smoothly arranged.

6. The air duct system for passenger compartment of a metropolitan train according to claim 5, characterized in that: The two side surfaces of the air supply cavity are respectively arranged to be aligned with the side surfaces of the two return air cavities; There are multiple air supply ducts and multiple air return ducts. Multiple air supply ducts are arranged on two side surfaces of the air supply cavity, and multiple air return ducts are respectively connected to the side surfaces of two return air cavities.

7. The air duct system for passenger compartment of a metropolitan train according to claim 6, characterized in that: The number of the first air supply outlet and the number of the return air outlet are both multiple.

8. The air duct system for passenger compartment of urban train according to claim 2, characterized in that: The passenger compartment of the urban train further includes luggage racks, the number of which is multiple, and the multiple luggage racks are arranged in two rows on top of the two rows of seats; The first air supply port of the air supply pipe is arranged at the bottom of the luggage rack.

9. The air duct system for passenger compartment of a metropolitan train according to claim 1, characterized in that: The urban train comprises a plurality of passenger compartments connected end to end in a length direction of the urban train, each passenger compartment comprises a first air duct segment, a second air duct segment and a third air duct segment, the first air duct segment is arranged at a first end of the second air duct segment, and the third air duct segment is arranged at a second end of the second air duct segment; A first connection port and a second connection port are provided at the top of the first air duct section and the top of the second air duct section, the first connection port is connected to the air supply cavity, the second connection port is connected to the air return cavity, and the first connection port and the second connection port are both connected to the air conditioning unit; A part of the return air cavity of the second air duct segment is connected to the return air cavity of the first air duct segment, a part of the supply air cavity of the second air duct segment is connected to the supply air cavity of the first air duct segment, another part of the return air cavity of the second air duct segment is connected to the return air cavity of the second air duct segment, and another part of the supply air cavity of the second air duct segment is connected to the supply air cavity of the second air duct segment.

10. A city train, characterized in that: The urban train comprises the air duct system for a passenger compartment of the urban train according to any one of claims 1 to 9.

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