Driver's cab ventilation system and urban EMU

Abstract

The present invention provides a driver's cab ventilation system and a metropolitan EMU train, comprising a driver's cab air conditioning unit, a driver's cab air duct, and a function-integrated air duct; the driver's cab air conditioning unit has a positive-pressure air supply port and a negative-pressure return air port, with the negative-pressure return air port and the positive-pressure air supply port forming an internal air circulation path for the driver's cab; the driver's cab air duct is connected to the positive-pressure air supply port and is used to discharge air treated by the driver's cab air conditioning unit into the driver's cab; the function-integrated air duct is connected to the passenger compartment fresh air duct and is provided with a fresh air port, with the fresh air port and the partition door grille of the driver's cab forming an external air circulation path for the driver's cab. The driver's cab ventilation system and metropolitan EMU train provided by the present invention can improve the stability of the temperature and air pressure in the driver's cab of a metropolitan EMU train, thereby enhancing the comfort of the driver's cab.

Description

Technical Field

[0001] The present invention belongs to the technical field of rail vehicles, and in particular relates to a driver's cab ventilation system and an urban rail vehicle multiple unit. Background Art

[0002] Urban EMUs are characterized by large crews, high speeds, and a route with many tunnels and intersecting ground lines. The driver's cab is small, the electrical cabinet generates a lot of heat, and the solar radiation temperature is high. Therefore, the driver's cab has a large demand for cooling air and needs to be equipped with pressure protection. At present, the ventilation system of the driver's cab of urban EMUs usually adopts two forms. One is to set up a driver's cab air-conditioning unit to provide fresh air, cooling and ventilation for the driver's cab separately. The other is to set up a ventilation unit for the driver's cab to introduce the air supply from the passenger compartment into the driver's cab to provide partial cooling and ventilation for the driver's cab.

[0003] For the first ventilation method, since the position of the driver's cab air-conditioning unit and the pressure wave detection port must be close to the front end of the vehicle, the pressure wave detection port and the driver's cab air-conditioning fresh air outlet feel the pressure fluctuation almost at the same time. When the pressure outside the vehicle fluctuates, the driver's cab air-conditioning unit cannot predict it and closes the fresh air outlet, causing the pressure wave to be transmitted into the driver's cab through the fresh air outlet of the driver's cab air-conditioning unit, causing instantaneous pressure changes in the driver's cab and affecting comfort. Moreover, when the driver's cab air-conditioning unit fails, it cannot supply air to the driver's cab, causing the temperature in the driver's cab to rise rapidly. Long-term failures will cause the temperature in the driver's cab to be too high and affect the normal operation of the vehicle.

[0004] For the second ventilation method, since the driver's cab of the urban EMU has three sides of glass that are exposed to the sun, the temperature in the driver's cab is much higher than the passenger compartment temperature when running on the ground, resulting in the inconsistency between the cooling air demand in the driver's cab and the cooling air demand in the passenger compartment. Therefore, on the premise of ensuring that the passenger compartment temperature meets the passenger comfort requirements, the driver's cab temperature will be higher than the human comfort range, thereby affecting the comfort of the driver in the driver's cab. Summary of the Invention

[0005] The embodiments of the present invention provide a driver's cab ventilation system and a city-area EMU, which are intended to improve the stability of the temperature and air pressure in the driver's cab of the city-area EMU, thereby improving the comfort of the driver's cab.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: first, a driver's cab ventilation system is provided, including a driver's cab air-conditioning unit, a driver's cab air duct, and a functional integrated air duct; the driver's cab air-conditioning unit has a positive-pressure air supply port and a negative-pressure return air port, and an internal air circulation flow path of the driver's cab is formed between the negative-pressure return air port and the positive-pressure air supply port; the driver's cab air duct is arranged on the top wall of the driver's cab, and is connected with the positive-pressure air supply port, and is used to discharge air treated by the driver's cab air-conditioning unit into the driver's cab; the functional integrated air duct is arranged on the top wall of the driver's cab, and the functional integrated air duct is connected with the passenger compartment fresh air duct, and a fresh air port is provided on the functional integrated air duct, and an external air circulation flow path of the driver's cab is formed between the fresh air port and the partition door grille of the driver's cab; wherein the partition door grille is used to discharge the air in the driver's cab into the EMU passenger compartment under the action of pressure difference, and discharge it outside the vehicle through the waste exhaust device in the EMU passenger compartment.

[0007] In combination with the first aspect, in a possible implementation, the electrical cabinet in the driver's cab has a heat dissipation vent and an air inlet grille, and the heat dissipation vent is connected to the negative pressure return air vent; wherein, the positive pressure air supply vent supplies air to the driver's cab through the driver's cab air duct, and the air in the driver's cab passes through the air inlet grille, the electrical cabinet, the heat dissipation vent, and the negative pressure return air vent in sequence under the action of negative pressure and returns to the driver's cab air-conditioning unit, thereby forming an internal air circulation path.

[0008] In some embodiments, the heat dissipation vent is opened on the top wall of the electrical cabinet, and the air inlet grille is arranged at the bottom of the side wall of the electrical cabinet; wherein, the driver's cab air duct supplies air to the driver's cab from top to bottom, and the air at the bottom of the driver's cab enters the electrical cabinet through the air inlet grille, and passes through the electrical cabinet from bottom to top and returns to the driver's cab air conditioning unit through the heat dissipation vent.

[0009] In combination with the first aspect, in a possible implementation, a first air duct and a second air duct isolated from each other are provided in the functional integrated air duct; one end of the first air duct is connected to the driver's cab air duct, and the other end is connected to the passenger compartment fresh air duct; one end of the second air duct is provided with a fresh air outlet, and the other end is connected to the passenger compartment fresh air duct; wherein, an electric damper is provided in the first air duct, and when the driver's cab air-conditioning unit is running, the electric damper is closed to block the first air duct, and when the driver's cab air-conditioning unit is shut down, the electric damper is opened to connect the first air duct.

[0010] For example, when the electric damper is closed, an external air circulation path is formed between the fresh air inlet alone and the partition door grille; when the electric damper is opened, an external air circulation path is formed between the fresh air inlet and the driver's cab air duct together with the partition door grille.

[0011] For example, the partition door grille is located at the bottom of the partition door in the driver's cab.

[0012] In some embodiments, the functional integrated air duct includes an air duct and a partition; one end of the air duct is sealed and connected to the passenger compartment fresh air duct, and the other end is sealed and connected to the driver's cab air duct; the partition is arranged in the air duct, and extends from the end of the air duct connected to the passenger compartment fresh air duct to the other end of the air duct, and the extended end of the partition is bent downward and sealedly connected to the bottom wall of the air duct; wherein, the internal space of the air duct above the partition is formed as a first air duct, and the internal space of the air duct below the partition is formed as a second air duct; the fresh air inlet is arranged on the bottom wall of the air duct directly below the extended end of the partition.

[0013] Exemplarily, the electric damper includes a rotating shaft, a sealing plate, and a rotating drive member; wherein, the two ends of the rotating shaft are respectively rotatably connected to the two opposite side walls of the first air duct, and one end extends out of the first air duct; the sealing plate is located in the first air duct and is fixedly connected to the rotating shaft, and has a closed state in which the four edges are rotated to seal against the inner circumferential wall of the first air duct, and also has an open state in which at least one side edge is rotated to be separated from the inner circumferential wall of the first air duct; the rotating drive member is fixedly connected to the outer wall of the first air duct, and the output end is connected to the protruding end of the rotating shaft, which is used to drive the sealing plate to rotate around the axis of the rotating shaft to switch between the closed state and the open state.

[0014] In some embodiments, the driver's cab air duct includes a first air inlet opened in the middle of its top wall, a second air inlet opened in the middle of its side wall, and two air outlets opened at both ends of its bottom wall; wherein, the first air inlet is sealedly connected to the positive pressure air supply port, the second air inlet is sealedly connected to the first air duct, and the two air outlets are both used to supply air into the driver's cab, and are respectively located on both sides of the driver's seat in the driver's cab.

[0015] The beneficial effects of the driver's cab ventilation system provided by the present invention are as follows: compared with the prior art, the driver's cab ventilation system of the present invention does not need to open or set up fresh air vents for the driver's cab air-conditioning unit. It only needs to transport cold air into the driver's cab through the positive pressure air supply port through the driver's cab air duct, and make the hot air in the driver's cab that has been heated up by heat exchange with the cold air return through the negative pressure return air port to form an air internal circulation flow path. On this basis, fresh air in the passenger compartment fresh air duct is introduced into the driver's cab through the functional integrated air duct, and the partition wall door grille of the driver's cab is used to discharge waste to the passenger compartment to form an air external circulation flow path in the driver's cab; not only can the air circulate in the driver's cab through the driver's cab air-conditioning unit, but also In addition to maintaining a stable and comfortable temperature, the functional integrated air duct and partition door grille can be used to circulate air outside the driver's cab to improve the air quality. There is no need to set a fresh air vent connected to the outside world on the driver's cab air-conditioning unit, and there is no need to configure fresh air filters, rainwater separators, pressure protection valves and other equipment on the driver's cab air-conditioning unit. This not only reduces the cost of the driver's cab air-conditioning unit, but also avoids pressure fluctuations in the driver's cab, thereby improving the air pressure stability and driver and passenger comfort in the driver's cab. In addition, when the driver's cab air-conditioning unit fails and stops, the ventilation of the driver's cab can be ensured through the air external circulation flow path, thereby avoiding ultra-high temperatures in the driver's cab and affecting normal operation.

[0016] In a second aspect, an embodiment of the present invention further provides an urban EMU train, comprising the above-mentioned driver's cab ventilation system.

[0017] The beneficial effects of the urban railcar provided by the present invention are: compared with the prior art, the urban railcar of the present invention, due to the adoption of the above-mentioned driver's cab ventilation system, can not only circulate air in the driver's cab through the driver's cab air-conditioning unit to maintain a stable and comfortable temperature, but also utilize functional integrated air ducts and partition door grilles to form an external circulation of air in the driver's cab to improve air quality. There is no need to set a fresh air vent connected to the outside world on the driver's cab air-conditioning unit, and there is no need to configure fresh air filters, rainwater separators, pressure protection valves and other equipment on the driver's cab air-conditioning unit. Not only can the cost of the driver's cab air-conditioning unit be reduced, but pressure fluctuations in the driver's cab can also be avoided, thereby improving the air pressure stability and driver and passenger comfort in the driver's cab; in addition, when the driver's cab air-conditioning unit fails and stops, the ventilation in the driver's cab can be ensured through the air external circulation path, thereby avoiding the occurrence of ultra-high temperature in the driver's cab and affecting normal operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of air circulation in a driver's cab ventilation system according to an embodiment of the present invention;

[0019] Figure 2 A bottom-up structural diagram of a driver's cab ventilation system provided by an embodiment of the present invention;

[0020] Figure 3A schematic diagram of the main structure of the driver's cab ventilation system provided by an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the layout structure of the electrical cabinet in the driver's cab used in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the overall structure of the driver's cab air duct and the functional integrated air duct used in an embodiment of the present invention;

[0023] Figure 6 A schematic diagram of the three-dimensional structure of the driver's cab air duct used in an embodiment of the present invention;

[0024] Figure 7 This is a schematic cross-sectional structural diagram of the driver's cab air duct and the functional integrated air duct used in an embodiment of the present invention.

[0025] In the figure: 10, driver's cab air conditioning unit; 11, positive pressure air supply vent; 12, negative pressure return air vent; 20, driver's cab air duct; 201, first air inlet; 202, second air inlet; 203, air outlet; 30, function integrated air duct; 300, fresh air inlet; 301, first air duct; 302, second air duct; 31, air cylinder; 32, partition; 33, electric damper; 331, rotating shaft; 332, sealing plate; 333, rotating drive component; 40, passenger compartment fresh air duct; 41, passenger compartment air conditioning unit; 42, exhaust device; 50, partition door grille; 60, air internal circulation flow path; 70, air external circulation flow path; 80, electrical cabinet; 81, heat dissipation vent; 82, air inlet grille; 90, driver's seat. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or indirectly on the other element. It should be understood that the terms “length,” “width,” “upper,” “lower,” “front,” “back,” “top,” “bottom,” “inner,” “outer,” etc., indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They 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 should not be understood as limiting the present invention.

[0028] Please also refer to Figures 1 to 7Now, the driver's cab ventilation system provided by the present invention is described. The driver's cab ventilation system includes a driver's cab air-conditioning unit 10, a driver's cab air duct 20, and a functional integrated air duct 30; the driver's cab air-conditioning unit 10 has a positive pressure air supply port 11 and a negative pressure return air port 12, and an internal air circulation flow path 60 of the driver's cab is formed between the negative pressure return air port 12 and the positive pressure air supply port 11; the driver's cab air duct 20 is arranged on the top wall of the driver's cab and is connected with the positive pressure air supply port 11, and is used to discharge air treated by the driver's cab air-conditioning unit 10 into the driver's cab; the functional integrated air duct 30 is arranged on the top wall of the driver's cab, and the functional integrated air duct 30 is connected with the passenger compartment fresh air duct 40, and a fresh air port 300 is provided on the functional integrated air duct 30, and an external air circulation flow path 70 of the driver's cab is formed between the fresh air port 300 and the partition door grille 50 of the driver's cab; wherein, the partition door grille 50 is used to discharge the air in the driver's cab into the EMU passenger compartment under the action of pressure difference, and discharge it outside the vehicle through the waste exhaust device 42 in the EMU passenger compartment.

[0029] It should be understood that the air-conditioning units used in EMUs are usually equipped with an external circulation fresh air system to ensure the air quality in the car. However, the driver's cab air-conditioning unit 10 in this embodiment does not need to be equipped with a fresh air system. It only needs to circulate air in the driver's cab through supply air and return air to meet the autonomous adjustment needs of the driver's cab temperature and ensure that the temperature in the driver's cab is stable and comfortable. At the same time, since the driver's cab air-conditioning unit can at least reduce the fresh air filter, rainwater separator, pressure protection valve and other equipment, the cost of the driver's cab air-conditioning unit 10 can be reduced; the fresh air supply in the driver's cab is introduced from the passenger compartment through the functional integrated air duct 30, and then discharged from the driver's cab through the partition door grille 50, so that the air in the driver's cab is circulated externally, so the pressure fluctuation outside the vehicle cannot be directly transmitted to the driver's cab, thereby ensuring the air pressure stability in the driver's cab.

[0030] It should also be noted that the passenger compartment air-conditioning unit 41 of the urban EMU is equipped with a fresh air system, which is connected to the passenger compartment fresh air duct 40. The passenger compartment air-conditioning unit 41 replenishes fresh air into the passenger compartment while diverting a part of it to the functional integrated air duct 30, and then sent into the driver's cab. In order to ensure the air supply volume, the passenger compartment fresh air duct 40 can be equipped with a fan and a diverter valve. The wind speed can be adjusted by adjusting the speed of the fan, and the air volume flowing to the driver's cab and passenger compartment can be adjusted by adjusting the valve plate angle of the diverter valve.

[0031] In this embodiment, the partition door refers to the connecting door between the driver's cab and the passenger compartment, and a grille is provided on the partition door to realize ventilation between the driver's cab and the passenger compartment; since the passenger compartment is long, there is sufficient space to arrange the passenger compartment air-conditioning unit 41 and the exhaust device 42 (that is, the ventilation device of the rail vehicle, which can discharge the exhaust gas inside the vehicle to the outside of the vehicle to ensure the air quality and air pressure inside the vehicle are stable). Therefore, when the air pressure in the passenger compartment is stable, when fresh air is added to the driver's compartment, the air pressure increases and the air is exhausted to the passenger compartment through the partition door grille 50, and then discharged to the outside of the vehicle through the exhaust device 42 of the passenger compartment, thereby realizing external circulation in the true sense.

[0032] Compared with the prior art, the driver's cab ventilation system provided by this embodiment does not need to open or set a fresh air vent for the driver's cab air conditioning unit 10. It only needs to transport cold air into the driver's cab through the positive pressure air supply port 11 through the driver's cab air duct 20, and make the hot air in the driver's cab that has been heated up by heat exchange with the cold air return through the negative pressure return air port 12 to form an air internal circulation flow path 60. On this basis, fresh air in the passenger compartment fresh air duct 40 is introduced into the driver's cab through the functional integrated air duct 30, and the partition door grille 50 of the driver's cab is used to discharge waste to the passenger compartment to form an air external circulation flow path 70 in the driver's cab. Not only can the air circulate in the driver's cab through the autonomous adjustment of the driver's cab air conditioning unit 10, thereby maintaining the temperature in the driver's cab The temperature is stable and comfortable, and the functional integrated air duct 30 and the partition door grille 50 can be used to form an external circulation of air in the driver's cab to improve the air quality. Since the driver's cab air-conditioning unit 10 does not need to be equipped with a fresh air outlet connected to the outside world, there is no need to configure the driver's cab air-conditioning unit 10 with fresh air filters, rainwater separators, pressure protection valves and other equipment. This not only reduces the cost of the driver's cab air-conditioning unit 10, but also avoids pressure fluctuations in the driver's cab, thereby improving the air pressure stability and driver and passenger comfort in the driver's cab; in addition, when the driver's cab air-conditioning unit 10 fails and stops, the ventilation in the driver's cab can be ensured through the air external circulation flow path 70, thereby avoiding ultra-high temperature in the driver's cab and affecting normal operation.

[0033] In some embodiments, see Figures 1 to 4 The electrical cabinet 80 in the driver's cab has a heat dissipation vent 81 and an air inlet grille 82, and the heat dissipation vent 81 is connected to the negative pressure return air vent 12; wherein, the positive pressure air supply vent 11 supplies air to the driver's cab through the driver's cab air duct 20, and the air in the driver's cab passes through the air inlet grille 82, the electrical cabinet 80, the heat dissipation vent 81, and the negative pressure return air vent 12 in sequence under the action of negative pressure and returns to the driver's cab air conditioning unit 10, thereby forming an air internal circulation flow path 60.

[0034] It should be understood that the driver's cab is not only exposed to solar radiation by the three glass panels, but also has a small interior space and many electrical equipment. Therefore, the cooling demand is high, and it is necessary to consider not only the comfort of the driver and passengers, but also the heat dissipation of the electrical equipment. Here, the heat dissipation port 81 of the electrical cabinet 80 is connected to the negative pressure return air port 12 of the driver's cab air conditioning unit 10, so that a negative pressure is generated inside the electrical cabinet 80. The driver's cab air duct 20 transports the cold air processed by the driver's cab air conditioning unit 10 into the driver's cab. After the cold air exchanges heat with the hot air in the driver's cab, it enters the electrical cabinet 80 through the air inlet grille 82 under the action of negative pressure, and takes away the heat inside the electrical cabinet 80 during the circulation between the air inlet grille 82 and the heat dissipation port 81. While meeting the cooling requirements of the internal space of the driver's cab, the ventilation and heat dissipation of the electrical cabinet 80 are also taken into account. This can not only ensure the temperature comfort in the driver's cab, but also improve the heat dissipation efficiency of the electrical cabinet 80 and avoid high-temperature failures of electrical equipment.

[0035] For some possible implementations, see Figure 1 The heat dissipation vent 81 is opened on the top wall of the electrical cabinet 80, and the air inlet grille 82 is set at the bottom of the side wall of the electrical cabinet 80; among them, the driver's cab air duct 20 supplies air to the driver's cab from top to bottom, and the air at the bottom of the driver's cab enters the electrical cabinet 80 through the air inlet grille 82, and passes through the electrical cabinet 80 from bottom to top and returns to the driver's cab air conditioning unit 10 through the heat dissipation vent 81.

[0036] Since the driver's cab air-conditioning unit 10 is encapsulated on the top of the driver's cab, the electrical cabinet 80 is usually connected to the floor at the bottom and to the roof at the top. Therefore, a heat dissipation vent 81 is directly opened on the top wall of the electrical cabinet. This not only forms the shortest path between the heat dissipation vent 81 and the negative pressure return air vent 12, thereby improving the negative pressure exhaust efficiency, but also utilizes the existing cavity on the roof to arrange the air duct to achieve a sealed connection between the two, reducing the layout difficulty and space occupancy.

[0037] In addition, the driver's cab air duct 20 located on the roof supplies air from top to bottom, so the air in the upper part of the driver's cab is fresh air and cold air, and the air in the lower part is waste air and hot air, and the air inlet grille 82 is set at the bottom of the electrical cabinet 80, so the waste air and hot air at the bottom of the driver's cab preferentially pass through the air inlet grille 82 and enter the electrical cabinet 80, thereby improving the cooling efficiency of the internal space of the driver's cab, and the air entering the electrical cabinet 80 forms an airflow from bottom to top, so that it can cover all electrical equipment inside the electrical cabinet 80, ensuring that each area in the electrical cabinet 80 can dissipate heat evenly, avoiding local high temperature in the corner area, and improving the heat dissipation efficiency of the electrical cabinet 80.

[0038] In some embodiments, the function integrated air duct 30 is as follows Figure 7The structure shown. The functional integrated air duct 30 is provided with a first air duct 301 and a second air duct 302, which are isolated from each other. One end of the first air duct 301 is connected to the driver's cab air duct 20, and the other end is connected to the passenger compartment fresh air duct 40. The second air duct 302 has a fresh air outlet 300 at one end and is connected to the passenger compartment fresh air duct 40 at the other end. The first air duct 301 is provided with an electric damper 33. When the driver's cab air conditioning unit 10 is running, the electric damper 33 is closed to block the first air duct 301. When the driver's cab air conditioning unit 10 is stopped, the electric damper 33 is opened to connect the first air duct 301.

[0039] Specifically, in this embodiment, when the electric damper 33 is closed, the fresh air inlet 300 forms an air external circulation flow path 70 with the partition door grille 50 alone; when the electric damper 33 is opened, the fresh air inlet 300 and the driver's cab air duct 20 form an air external circulation flow path 70 with the partition door grille 50 together.

[0040] The fresh air inlet 300 is arranged on the second air duct 302 so that the passenger compartment fresh air duct 40 continuously supplies fresh air to the driver's compartment, and an electric damper 33 is arranged in the first air duct 301. Under normal circumstances, the driver's compartment air-conditioning unit 10 works normally, and the electric damper 33 is closed to prevent cold air from flowing back into the passenger compartment fresh air duct 40 through the first air duct 301, ensuring that all the cold air processed by the driver's compartment air-conditioning unit 10 is sent into the driver's compartment through the driver's compartment air duct 20, thereby ensuring cooling efficiency; when the outside temperature is low, there is no need to turn on the driver's compartment air-conditioning unit 10 or the driver's compartment air-conditioning unit 10 fails When the electric damper 33 is opened, the fresh air from the passenger compartment fresh air duct 40 can enter the driver's cab air duct 20 through the first air duct 301, thereby supplying air to the driver's cab, so that the air in the driver's cab maintains external circulation. On the one hand, it can avoid the ineffective operation of the driver's cab air-conditioning unit 10 and waste of electricity. On the other hand, it can avoid high temperature in the driver's cab affecting the normal driving of the driver and passengers when the driver's cab air-conditioning unit 10 fails; and the first air duct 301 and the second air duct 302 are used to supply air to the driver's cab at the same time, thereby increasing the air volume of the external circulation and ensuring the temperature balance of the driver's cab.

[0041] Furthermore, when the electric damper 33 is opened, the opening degree can be adjusted to control the ventilation volume of the first air duct 301, thereby controlling the total air supply volume in the driver's cabin and keeping the temperature in the driver's cabin balanced.

[0042] Preferably, in this embodiment, the partition door grille 50 is located at the bottom of the partition door of the driver's cab. Since the air supply from the driver's cab air conditioning unit 10 and the air outlet from the fresh air vent 300 are both blown downward from the roof, the air quality in the upper part of the driver's cab is better than that in the lower part. Therefore, the partition door grille 50 is located at the bottom of the partition door to allow the air at the bottom of the driver's cab to be discharged, thereby improving the air quality in the driver's cab.

[0043] Please combine Figure 5 and Figure 7 In this embodiment, the functional integrated air duct 30 includes an air duct 31 and a partition 32; one end of the air duct 31 is sealed and connected to the passenger compartment fresh air duct 40, and the other end is sealed and connected to the driver's cab air duct 20; the partition 32 is arranged in the air duct 31, and extends from the end of the air duct 31 connected to the passenger compartment fresh air duct 40 to the other end of the air duct 31, and the extended end of the partition 32 is bent downward and sealedly connected to the bottom wall of the air duct 31; wherein, the internal space of the air duct 31 above the partition 32 is formed as a first air duct 301, and the internal space of the air duct 31 below the partition 32 is formed as a second air duct 302; the fresh air inlet 300 is provided on the bottom wall of the air duct 31 directly below the extended end of the partition 32.

[0044] The first air duct 301 and the second air duct 302 are separated up and down by the partition 32, so that the fresh air outlet 300 can be directly opened on the bottom wall of the second air duct 302. At the same time, the two ends of the air tube 31 can be directly sealed and connected with the passenger compartment fresh air duct 40 and the driver's compartment air duct 20 respectively. The layout is easy, the structure is simple and compact, and does not occupy the internal space of the driver's compartment.

[0045] Optionally, in this embodiment, the electric damper 33 includes a rotating shaft 331, a sealing plate 332, and a rotating drive member 333; wherein, the two ends of the rotating shaft 331 are respectively rotatably connected to the two opposite side walls of the first air duct 301, and one end thereof extends out of the first air duct 301; the sealing plate 332 is located in the first air duct 301 and is fixedly connected to the rotating shaft 331, and has a closed state in which the edges thereof are rotated to seal against the inner circumferential wall of the first air duct 301, and also has an open state in which the edges thereof are rotated to separate from the inner circumferential wall of the first air duct 301; the rotating drive member 333 is fixedly connected to the outer wall of the first air duct 301, and the output end is connected to the protruding end of the rotating shaft 331, and is used to drive the sealing plate 332 to rotate around the axis of the rotating shaft 331 to switch between the closed state and the open state.

[0046] Usually, the driver's cab air duct 20 and the passenger compartment fresh air duct 40 adopt rectangular tubes. In order to facilitate docking and assembly, the functional integrated air duct 30 also preferably adopts a matching rectangular tube. The first air duct 301 and the second air duct 302 separated by the partition 32 are also rectangular. Therefore, the sealing plate 332 adopts a matching rectangular plate. The rotating drive member 333 can be a motor or a cylinder. When the rotating drive member 333 drives the rotating shaft 331 to rotate and the sealing plate 332 swings to a vertical or near vertical state, its various side edges respectively contact the various inner wall surfaces of the first air duct 301 to achieve isolation. When the rotating drive member 333 drives the sealing plate 332 to swing in the opposite direction, the two horizontally opposite sides of the sealing plate 332 maintain contact with the two side walls of the first air duct 301, and the upper edge and the lower edge are separated from the top wall and the bottom wall of the first air duct 301 respectively. When the sealing plate 332 swings to the horizontal, the opening reaches the maximum.

[0047] In some embodiments, see Figure 2 、 Figure 6 and Figure 7 The driver's cab air duct 20 includes a first air inlet 201 opened in the middle of its top wall, a second air inlet 202 opened in the middle of its side wall, and two air outlets 203 respectively opened at both ends of its bottom wall; wherein, the first air inlet 201 is sealedly connected to the positive pressure air supply port 11, the second air inlet 202 is sealedly connected to the first air duct 301, and the two air outlets 203 are both used to supply air to the driver's cab, and are respectively located on both sides of the driver's seat 90 of the driver's cab.

[0048] The two air outlets 203 are set on both sides of the driver's seat 90 to avoid air outlet directly facing the driver's seat 90 and affecting the comfort of the driver and passengers. At the same time, it also avoids the air outlet 203 facing the positive pressure air supply port 11 of the driver's cab air conditioning unit 10. Therefore, the driver's cab air duct 20 can be located between the two air outlets 203 to block the noise transmission of the positive pressure air supply port 11, thereby reducing the head noise of the driver and passengers and improving comfort.

[0049] In addition, it should be understood that two electrical cabinets 80 are usually arranged opposite each other in the driver's cab, a pedestrian passage is formed between the two electrical cabinets 80 and a partition door is installed, and air inlet grilles 82 are opened at the bottom of the opposite side walls of the two electrical cabinets 80, so that the air circulation path in the driver's cab is formed from top to bottom and from both sides to the middle, so that the air in the driver's cab is fully circulated, thereby improving the temperature balance and comfort in the driver's cab.

[0050] Based on the same invention concept, please combine Figures 1 to 7 , an embodiment of the present application also provides a city-area EMU train, including the above-mentioned driver's cab ventilation system.

[0051] Compared with the prior art, the urban railcar provided by the present invention adopts the above-mentioned driver's cab ventilation system, which can not only circulate air in the driver's cab through the driver's cab air-conditioning unit 10 to maintain a stable and comfortable temperature, but also utilize the functional integrated air duct 30 and the partition door grille 50 to form an external circulation of air in the driver's cab to improve the air quality. There is no need to set a fresh air vent connected to the outside world on the driver's cab air-conditioning unit 10, and there is no need to configure fresh air filters, rainwater separators, pressure protection valves and other equipment on the driver's cab air-conditioning unit 10. Not only can the cost of the driver's cab air-conditioning unit 10 be reduced, but pressure fluctuations in the driver's cab can also be avoided, thereby improving the air pressure stability and driver and passenger comfort in the driver's cab; in addition, when the driver's cab air-conditioning unit 10 fails and stops, the ventilation in the driver's cab can be ensured through the air external circulation path 70, thereby avoiding the occurrence of ultra-high temperature in the driver's cab and affecting normal operation.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. The driver's cab ventilation system is characterized by: include: The driver's cab air conditioning unit has a positive pressure air supply port and a negative pressure return air port, wherein an air circulation path in the driver's cab is formed between the negative pressure return air port and the positive pressure air supply port; A driver's cab air duct is provided on the top wall of the driver's cab and is in communication with the positive pressure air supply port, and is used to discharge air treated by the driver's cab air conditioning unit into the driver's cab; A functional integrated air duct is provided on the top wall of the driver's cab, the functional integrated air duct is connected to the fresh air duct of the passenger compartment, and a fresh air outlet is provided on the functional integrated air duct, and an air circulation path outside the driver's cab is formed between the fresh air outlet and the partition door grille of the driver's cab; The partition door grille is used to allow the air in the driver's cab to be discharged into the EMU passenger compartment under the action of pressure difference, and then discharged outside the vehicle through the exhaust device in the EMU passenger compartment; The functional integrated air duct is provided with a first air duct and a second air duct isolated from each other; one end of the first air duct is connected to the driver's cab air duct, and the other end is connected to the passenger compartment fresh air duct; one end of the second air duct is provided with the fresh air outlet, and the other end is connected to the passenger compartment fresh air duct; An electric damper is provided in the first air duct. When the driver's room air conditioning unit is running, the electric damper is closed to block the first air duct. When the driver's room air conditioning unit is stopped, the electric damper is opened to connect the first air duct.

2. The driver's cab ventilation system according to claim 1, characterized in that: The electrical cabinet in the driver's cab has a heat dissipation port and an air inlet grille, and the heat dissipation port is connected to the negative pressure return air port; Among them, the positive pressure air supply port supplies air to the driver's cab through the driver's cab air duct, and the air in the driver's cab passes through the air inlet grille, the electrical cabinet, the heat dissipation port, and the negative pressure return air port in sequence under the action of negative pressure and returns to the driver's cab air-conditioning unit, thereby forming the air internal circulation flow path.

3. The driver's cab ventilation system according to claim 2, characterized in that: The heat dissipation vent is opened on the top wall of the electrical cabinet, and the air inlet grille is arranged at the bottom of the side wall of the electrical cabinet; wherein, the driver's cab air duct supplies air to the driver's cab from top to bottom, and the air at the bottom of the driver's cab enters the electrical cabinet through the air inlet grille, passes through the electrical cabinet from bottom to top, and returns to the driver's cab air-conditioning unit through the heat dissipation vent.

4. The driver's cab ventilation system according to claim 1, characterized in that: When the electric damper is closed, the air external circulation flow path is formed between the fresh air inlet alone and the partition door grille; when the electric damper is opened, the fresh air inlet and the driver's cab air duct together form the air external circulation flow path between the partition door grille.

5. The driver's cab ventilation system according to claim 4, characterized in that: The partition door grille is located at the bottom of the partition door of the driver's cab.

6. The driver's cab ventilation system according to claim 1, characterized in that: The function-integrated air duct comprises: An air duct, one end of which is sealed and connected to the passenger compartment fresh air duct, and the other end of which is sealed and connected to the driver's compartment air duct; a partition plate disposed in the air duct and extending from the end where the air duct and the fresh air duct of the passenger compartment meet to the other end of the air duct, wherein the extended end of the partition plate is bent downward and sealedly connected to the bottom wall of the air duct; Among them, the internal space of the air duct located above the partition forms the first air duct, and the internal space of the air duct located below the partition forms the second air duct; the fresh air inlet is arranged on the bottom wall of the air duct directly below the extended end of the partition.

7. The driver's cab ventilation system according to claim 1, characterized in that: The electric damper comprises: a rotating shaft, having two ends rotatably connected to two opposite side walls of the first air duct, and one end extending out of the first air duct; a sealing plate, located in the first air duct and fixedly connected to the rotating shaft, capable of rotating to a closed state in which all four edges thereof are in sealing contact with the inner peripheral wall of the first air duct, and also capable of rotating to an open state in which at least one edge thereof is separated from the inner peripheral wall of the first air duct; A rotary drive member is fixedly connected to the outer wall of the first air duct, and an output end is connected to the protruding end of the rotating shaft, and is used to drive the sealing plate to rotate around the axis of the rotating shaft to switch between the closed state and the open state.

8. The driver's cab ventilation system according to claim 1, characterized in that: The driver's cab air duct includes a first air inlet opened in the middle of its top wall, a second air inlet opened in the middle of its side wall, and two air outlets opened at both ends of its bottom wall respectively; Among them, the first air inlet is sealedly connected to the positive pressure air supply port, the second air inlet is sealedly connected to the first air duct, and the two air outlets are used to supply air into the driver's cab and are respectively located on both sides of the driver's seat in the driver's cab.

9. Urban EMU, characterized by: The driver's cab ventilation system comprises the driver's cab ventilation system according to any one of claims 1 to 8.

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