Railway vehicle

Abstract

The utility model provides a railway vehicle which comprises an air conditioning unit and a three-phase active filtering power supply device, and a main body structure of the power supply device is arranged above an air return area of the air conditioning unit. The railway vehicle provided by the utility model is provided with the three-phase active filtering power supply device, so that the internal space of an air conditioner is effectively used, the heat dissipation problem is solved, and a refrigerating system is not influenced.

Description

Technical Field

[0009]

[0001] The utility model belongs to the technical field of rail vehicles, especially rail vehicles equipped with a three-phase active power filter power supply device. Background Art

[0002] Most of the large power-consuming equipment on existing rail transit vehicles is powered by AC380V. Usually provided by the auxiliary power supply SIV of the train, and the impact of the power-consuming equipment on the power grid quality is basically not evaluated.

[0003] With the increase of power-consuming equipment, the need to improve the power grid quality and reduce the impact of harmonic interference is more urgent. The use of passive filters is increasing continuously. However, with the continuous improvement of the requirements for the power grid quality, the requirements for the distorted wave content of current harmonics are getting lower and lower. When the requirement is 20%-10%, the use of passive filters can also solve the problem, but the weight and cost increase relatively much. If the requirement for the distorted wave content of current harmonics is reduced to less than 8%, it can only be solved by active filters.

[0004] Many of the passenger compartment variable-frequency air conditioners on existing rail transit vehicles use passive solutions, which are usually applicable to application scenarios with not too high requirements for the power grid quality. For occasions with higher requirements for the power grid quality, most manufacturers will use an independent active power filter power supply, which is used together with the frequency converter, that is, an independent power supply product is installed.

[0005] Active filters are used in other industries. If directly used in the air conditioner of rail transit vehicles, corresponding installation space needs to be reserved, which is not conducive to the effective utilization of the air conditioner space. Content of the Utility Model

[0006] [[ID=​​​​​​​​​​​​​​Furthermore, the power supply device includes a heat dissipation unit, which is disposed in the return air area.

[0012] Furthermore, the filter reactor and boost reactor of the power supply device are installed inside the heat dissipation unit.

[0013] Furthermore, the power supply device includes an electrical control box, and the heat dissipation unit is disposed below the electrical control box.

[0014] Furthermore, the power supply device also includes a frequency converter, the heat dissipation fins of which are disposed in the return air area.

[0015] Furthermore, the power supply device is assembled and fixed to the return air area via a mounting bracket.

[0016] Furthermore, the power supply device includes a power connector, and the air conditioner is provided with an air conditioning unit connector. The vehicle power input line reaches the power connector through the air conditioning unit connector to supply power to the power supply device.

[0017] Furthermore, the power supply device includes at least a filter board, a driver board, and a main control board, which are laid flat within the space enclosed by the housing of the power supply device.

[0018] By adopting the above technical solution, the rail vehicle provided by this utility model has the following advantages compared with the prior art:

[0019] 1. It has the function of effectively suppressing current harmonics, making it more suitable for the spatial characteristics of variable frequency air conditioners in rail transit vehicles. It adopts a flat and miniaturized design, which saves installation height space and uses heat dissipation fins to facilitate heat dissipation. The overall layout is located on the upper side of the return air, which helps to improve heat dissipation efficiency.

[0020] 2. All electrical components and electronic devices are located inside the electrical control box, which improves the level of pollution resistance and avoids the impact of dust on circuit reliability over long-term use.

[0021] 3. Modular design facilitates installation and maintenance.

[0022] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0023] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0024] In the attached diagram:

[0025] Figure 1 This utility model provides a schematic diagram of the installation position of a three-phase active filter power supply device in a rail vehicle.

[0026] Figure 2 This utility model provides a schematic diagram of the internal structure layout of a three-phase active filter power supply device in a rail vehicle.

[0027] Figure 3 This utility model provides a schematic diagram of the structure of the electronically controlled heat dissipation unit in a three-phase active power filter device for rail vehicles. Figure 1 ;

[0028] Figure 4 This utility model provides a schematic diagram of the structure of the electronically controlled heat dissipation unit in a three-phase active power filter device for rail vehicles. Figure 2 ;

[0029] The components include: 1. Power supply unit; 2. Bracket; 3. Power supply unit connector; 4. Fastener; 5. Evaporator; 6. Air conditioning unit connector; 7. Fan; 8. Air valve; 9. Cover plate; 10. Sealing strip; 11. Housing; 12. Filter reactor; 13. Step-up reactor; 14. Filter board; 15. Drive board; 16. Main control board; 17. Reactor heat dissipation unit; 18. Power tube heat dissipation fins; and 19. Frequency converter unit.

[0030] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] The present invention provides a rail vehicle, including an air conditioning unit and a three-phase active filter power supply device 1, the main structure of which is arranged above the return air area of ​​the air conditioning unit.

[0035] The rail vehicle provided by this utility model is equipped with an air conditioning unit in each carriage. Each air conditioning unit includes at least one evaporator group, each evaporator group includes at least one evaporator 5, and one or more ventilators 7 are provided at each evaporator group to improve the heat exchange efficiency of the evaporator 5.

[0036] The vehicle compartment is equipped with a return air area, which is located on the roof panel next to any evaporator group. It is a relatively large air circulation space, and the temperature there is relatively close to the indoor temperature. The return air area is equipped with a return air grille (not shown in the figure), a damper 8, and a return air duct (not shown in the figure) at the return air inlet. The indoor air is returned to each evaporator 5 through the return air grille for reheating. The flow of fresh air is controlled by the damper 8.

[0037] In this embodiment, the three-phase active power supply 1 utilizes the return air in the return air area to effectively dissipate heat from the power supply 1. Furthermore, a power supply bracket 2 is provided on the roof panel in the return air area. The power supply 1 is mounted above the return air area via the bracket 2. The return air flows from the interior below the return air grille, through the return air grille, through the power supply 1, and then back to the evaporator 1 for further heat exchange.

[0038] The air conditioning unit includes at least two evaporator groups. In this embodiment, for example... Figure 1 As shown, the left and right sides of the return air area ( Figure 1 Each of the indicated locations is equipped with one evaporator group, meaning the power supply unit is positioned above the return air area between two adjacent evaporator groups. This allows for ventilation fans on both sides of the power supply unit, increasing airflow speed and heat exchange efficiency. In practical applications, the number of evaporators 5 / evaporator groups, the number of return air areas, and the corresponding number of power supply units 1 can be used to fix the power supply unit 1 above the return air area via a bracket 2 or other similar structure, utilizing the return air for heat dissipation. Preferably, a ventilation fan is provided on at least one side of the power supply unit 1.

[0039] The power supply unit 1 is equipped with a power supply unit connector 3, and the air conditioning unit is equipped with an air conditioning unit connector 6. The vehicle power input line passes through the air conditioning unit connector 6 and reaches the power supply unit connector 3 to supply power to the power supply unit 1. The power supply unit connector 3 is suitable for a wide voltage range input, which can meet the wide voltage input of AC300V-AC480V and is suitable for input conditions of 47-63Hz.

[0040] like Figures 2 to 4 As shown, the main structure of the power supply device 1 includes a housing 11, which is a box-shaped structure with an open top. The opening is sealed by a cover plate 9. The cover plate 9 is fixedly connected to the housing by fasteners 4. A sealing strip 10 is provided at the connection between the cover plate 9 and the housing 11 to prevent dust and water stains from entering the housing 11 and falling onto the electrical components of the power supply device 1, thereby reducing safety hazards.

[0041] The power supply unit 1 includes three main parts: a filter board 14, a drive board 15, and a main control board 16. Each component adopts a flat and integrated design and is laid out flat inside the housing, so that each component is laid out flat in the space enclosed by the housing 11 and is positioned above the return air area.

[0042] The power supply unit 1 is positioned above the return air area and employs a flat-lay design, occupying minimal height space. Utilizing return air for heat dissipation, it has minimal impact on the return air and cooling effect of the air conditioning system, making it suitable for variable frequency air conditioning applications in rail transit and offering significant advantages for widespread adoption. Preferably, an electrical control box is also housed within the housing 11. The filter board 14, drive board 15, and main control board 16 are housed within the electrical control box and laid flat within it. The electrical control box is embedded within the space enclosed by the housing 11 and sealed by the cover plate 9, further enhancing the power supply unit 1's resistance to contamination and preventing the impact of dust and potential water stains on circuit reliability during long-term use. In practical applications, the electrical control box can be integrated with the housing 11 into a single structure to reduce costs and the overall weight of the power supply unit 1.

[0043] Furthermore, the power supply unit also includes a reactor assembly, which includes a filter reactor 12 and a boost reactor 13. During the use of the power supply unit 1, the filter reactor 12 and the boost reactor 13 experience high temperature rises. To improve the heat dissipation efficiency of the reactor assembly, a reactor heat dissipation unit 17 is also provided inside the housing. The filter reactor 12 and the boost reactor 13 are fixed inside the reactor heat dissipation unit 17 and extend from the bottom of the housing 11 or are fixed to the bottom of the base plate of the housing 11, sinking into the return air area, i.e., sinking into the return air duct, utilizing the return air to comprehensively dissipate heat from the reactor heat dissipation unit 17, thereby improving heat dissipation efficiency. The reactor heat dissipation unit is provided with power tube heat dissipation fins 18 to further improve heat dissipation efficiency.

[0044] Furthermore, the power supply unit also includes a frequency converter, which includes heat dissipation fins, which are also located in the return air area to improve heat dissipation efficiency.

[0045] The power supply unit 1 includes an EMC filter circuit, a boost circuit, a power current detection circuit, and a drive circuit. This is a standard configuration and will not be described in detail. Since the filter board 14, drive board 15, and main control board 16 are laid flat inside the control box / housing 11, the various circuits are also laid flat inside the control box / housing 11. The use of a flat, integrated, and miniaturized design makes the power supply unit 1 more suitable for the application of variable frequency air conditioning in rail vehicles, saving installation space and reducing the impact on the refrigeration system.

[0046] The power supply device 1 described above can be used as a modular product in batches on rail vehicles. Furthermore, the power supply device 1 can also be used on other vehicles, such as buses, by adapting the installation position, the installation position of the mounting bracket 2, and the assembly method according to the different vehicles to be installed on, which will not be elaborated further.

[0047] By adopting the above technical solution, the rail vehicle provided by this utility model has the following advantages compared with the prior art:

[0048] 1. It has the function of effectively suppressing current harmonics, making it more suitable for the spatial characteristics of variable frequency air conditioners in rail transit vehicles. It adopts a flat and miniaturized design, which saves installation height space and uses heat dissipation fins to facilitate heat dissipation. The overall layout is located on the upper side of the return air, which helps to improve heat dissipation efficiency.

[0049] 2. All electrical components and electronic devices are located inside the electrical control box, which improves the level of pollution resistance and avoids the impact of dust on circuit reliability over long-term use.

[0050] 3. Modular design facilitates installation and maintenance.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A rail vehicle, characterized in that: It includes an air-conditioning unit and a three-phase active power filter power supply device, and the main structure of the power supply device is arranged above the return air area of the air-conditioning unit.

2. A rail vehicle as described in claim 1, characterized in that: The air-conditioning unit includes at least two groups of evaporator groups, and the power supply device is arranged between two adjacent groups of evaporator groups.

3. A rail vehicle as described in claim 2, characterized in that: Evaporator fans supporting the evaporator units are arranged on both sides of the power supply device.

4. A rail vehicle as described in claim 1, characterized in that: The power supply device includes a heat dissipation unit, and the heat dissipation unit is arranged at the return air area.

5. A rail vehicle as described in claim 4, characterized in that: The filter reactor and boost reactor of the power supply device are installed in the heat dissipation unit.

6. A rail vehicle as described in claim 5, characterized in that: The power supply device includes an electric control box, and the heat dissipation unit is arranged below the electric control box.

7. A rail vehicle as described in claim 1, characterized in that: The power supply device further includes a frequency conversion unit, and the heat dissipation fins of the frequency conversion unit are arranged at the return air area.

8. A rail vehicle as described in claim 1, characterized in that: The power supply device is assembled and fixed to the return air area through a mounting bracket.

9. A rail vehicle as described in claim 1, characterized in that: The power supply device includes a power connector, and the air conditioner is provided with an air-conditioning unit connector. The vehicle-mounted power input lead reaches the power connector through the air-conditioning unit connector to supply power to the power supply device.

10. A rail vehicle as described in any one of claims 1 to 9, characterized in that: The power supply device includes at least a filter board, a drive board and a main control board, and the filter board, the drive board and the main control board are arranged in a flat manner in the space enclosed by the housing of the power supply device.

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