Integrated traction high-pressure tank

Abstract

The embodiment of the application provides an integrated traction high-voltage box, and belongs to the technical field of electrical equipment of a city rail transit traction system, and aims to solve the problem of difficult disassembly and maintenance of train bottom equipment in related technologies. The integrated traction high-voltage box comprises a cabinet body, and a high-voltage unit, a pre-charging unit, an inverter unit, a filter unit, an emergency traction unit, a control unit and a circuit detection unit which are electrically connected and installed in the cabinet body. The units are integrated in the cabinet body, and the units are electrically connected through copper bars or cables. The cabinet body is installed at the bottom of the train, so that the bottom of the train is more tidy and the layout is simpler. Compared with a split type, the integrated layout device does not need to set an interface for each device, thereby reducing the number of under-train devices and the types of interfaces and reducing the assembly difficulty. In addition, wiring of the units in the cabinet body is simpler, and disassembly and maintenance of different units are facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment of urban rail transit traction system, and particularly relates to an integrated traction high-voltage box. BACKGROUND

[0002] The traction system is the core system of the urban rail train, is the source of the train power, provides the train with the traction force and the electric braking force according to the needs, completes the traction and braking of the train, and mainly comprises components such as a traction inverter, a filter reactor, an isolation switch and a high-speed circuit breaker.

[0003] The existing traction system separately arranges a traction inverter box, an isolation switch box and a high-speed circuit breaker box under the train, and each device is provided with an interface, the interfaces between the multiple devices are various, and cables with different types of connectors are needed for connection.

[0004] Since the existing traction system contains many devices, the interfaces between the devices are various, the layout and wiring of the under-train devices are difficult, and the disassembly and maintenance are difficult. SUMMARY

[0005] In order to solve at least one problem mentioned in the background, the present application provides an integrated traction high-voltage box, which has the characteristics of high integration, convenient layout on the train and convenient disassembly and maintenance.

[0006] In order to achieve the above-mentioned purpose, the present application provides an integrated traction high-voltage box, which comprises: a cabinet body, and a high-voltage unit, a pre-charging unit, an inverter unit, a filter unit, an emergency traction unit, a control unit and a circuit detection unit installed in the cabinet body; the high-voltage unit, the pre-charging unit, the inverter unit, the filter unit, the emergency traction unit, the control unit and the circuit detection unit are electrically connected inside the cabinet body.

[0007] The integrated traction high-voltage box provided by the present application integrates the high-voltage unit, the pre-charging unit, the inverter unit, the filter unit, the emergency traction unit, the control unit and the circuit detection unit in the cabinet body, and then installs the cabinet body at the bottom of the train. The integrated layout makes the bottom of the train more tidy and the layout simpler than when each unit is separately installed at the bottom of the train. The high-voltage unit, the pre-charging unit, the inverter unit, the filter unit, the emergency traction unit, the control unit and the circuit detection unit are electrically connected through copper bars or cables, without the need to separately provide interfaces for each unit, thereby reducing the number and types of interfaces of the under-train devices and reducing the assembly difficulty. In addition, the wiring of each unit in the cabinet body is simpler, which facilitates the disassembly and maintenance of different units.

[0008] In some possible embodiments, the cabinet is provided with two parallel and spaced partitions to divide the cabinet into a middle cavity, a first cavity and a second cavity on two sides of the middle cavity; the inverter unit comprises a first power module and a second power module, the first power module, the control unit and the emergency traction unit are located in the first cavity, the second power module, the high-voltage unit and the circuit detection unit are located in the second cavity, and the pre-charging unit and the filter unit are located in the middle cavity.

[0009] In this way, the units in the cabinet are arranged in an orderly manner, which is convenient for maintenance and replacement of the operating personnel, and the mutual influence between the units installed in different partitions is reduced.

[0010] In some possible embodiments, the integrated traction high-voltage box further comprises a cooling device, the cabinet is provided with a first air inlet and a second air inlet, the first air inlet is arranged opposite to the first power module, the second air inlet is arranged opposite to the second power module, the partition between the first cavity and the middle cavity is provided with a first opening, the partition between the second cavity and the middle cavity is provided with a second opening; the cooling device is arranged in the middle cavity, the cabinet is provided with an air outlet communicating with the middle cavity, and the cooling device is configured to drive air to enter through the first air inlet and the second air inlet, and air in the middle cavity to flow out through the air outlet.

[0011] In this way, after the air enters the middle cavity through the air inlet, the air can exchange heat with the first power module and the second power module extending into the middle cavity, so as to cool the first power module and the second power module.

[0012] In some possible embodiments, the first power module is provided with a first heat sink facing the first opening, and the second power module is provided with a second heat sink facing the second opening.

[0013] In this way, the heat generated by the first power module and the second power module can be transmitted to the middle cavity through the heat sink, and discharged from the cabinet through the air outlet under the action of the cooling fan, so as to cool the power module.

[0014] In some possible embodiments, the filter unit comprises a filter reactor and a filter capacitor, and the filter reactor is arranged in the middle cavity and opposite to the air outlet.

[0015] In this way, the filter reactor is arranged in the middle cavity and opposite to the air outlet, so that the heat generated by the filter reactor can be directly discharged from the air outlet, and the filter reactor can be better cooled.

[0016] In some possible implementation manners, the air inlet and / or the air outlet is provided with a guide vane near one side of the interior of the cabinet, and the guide vane is used to guide the air in the interior of the cabinet.

[0017] After the guide vane is arranged and connected to the air inlet or the air outlet, the rigidity of the door cover plate at the air inlet or the air outlet is improved, so that the vibration is reduced and the noise is lowered. In addition, the air entering from the air inlet flows more smoothly under the guiding effect of the guide vane, the disturbance to the door cover plate is reduced, and the noise is further reduced.

[0018] In some possible implementation manners, the high-voltage unit includes an isolation diode, and the cabinet is provided with a heat dissipation hole at a position opposite to the isolation diode.

[0019] In this way, the heat generated by the isolation diode can be dissipated to the outside of the cabinet through the heat dissipation hole, and the heat dissipation effect of the isolation diode is improved.

[0020] In some possible implementation manners, the cabinet is provided with a first dismounting opening for dismounting and mounting the first power module on the outer wall parallel to the partition plate, and the cabinet is hingedly connected with a first dismounting plate used to block the first dismounting opening; and the cabinet is provided with a second dismounting opening for dismounting and mounting the second power module on the outer wall parallel to the partition plate, and the cabinet is hingedly connected with a second dismounting plate used to block the second dismounting opening.

[0021] In this way, the operating personnel can open the first dismounting plate or the second dismounting plate, and maintain and replace the power module through the first dismounting opening or the second dismounting opening, so that the operation is more convenient.

[0022] In some possible implementation manners, the first dismounting plate is further connected with the cabinet through a first locking member, and the second dismounting plate is further connected with the cabinet through a second locking member.

[0023] In this way, the first dismounting plate or the second dismounting plate can be prevented from being opened by personnel without operation authority, and the first dismounting plate or the second dismounting plate can be prevented from being automatically opened to cause a safety hazard during train operation, so that the safety is improved.

[0024] In some possible implementation manners, a sealing member is arranged between the first dismounting plate and / or the second dismounting plate and the cabinet.

[0025] In this way, the sealing property of the cabinet can be further improved, and dust and other impurities in the air can be prevented from entering the cabinet to affect the operation of the unit. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the accompanying drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained on the basis of these drawings without creative labor.

[0027] Figure 1 A top structure schematic diagram of the integrated traction high-voltage box provided by the embodiment of the present application is shown in the figure.

[0028] Figure 2 A bottom structure schematic diagram of the integrated traction high-voltage box provided by the embodiment of the present application is shown in the figure.

[0029] Figure 3 A partial sectional view of the integrated traction high-voltage box provided by the embodiment of the present application is shown in the figure.

[0030] Figure 4 An internal structure schematic diagram of the integrated traction high-voltage box provided by the embodiment of the present application is shown in the figure.

[0031] Explanation of reference signs:

[0032] 12 - door cover plate

[0033] 121 - locking piece

[0034] 122 - handle

[0035] 123 - second dismounting plate

[0036] 13 - first ventilation area

[0037] 14 - second ventilation area

[0038] 15 - air inlet

[0039] 16 - air outlet

[0040] 17 - heat dissipation hole

[0041] 21 - isolation diode

[0042] 22 - three-position switch

[0043] 23 - auxiliary fuse

[0044] 24 - high-speed circuit breaker

[0045] 31 - pre-charge contactor

[0046] 41 - first power module

[0047] 411 - profile heat sink

[0048] 42 - second power module;

[0049] 51 - filter reactance;

[0050] 61 - emergency traction contactor;

[0051] 62 - current sensor;

[0052] 72 - voltage conditioning board;

[0053] 73 - control unit;

[0054] 74 - control unit cooling fan;

[0055] 75 - gate drive power supply;

[0056] 76 - braking resistor bank fan circuit breaker;

[0057] 81 - voltage sensor;

[0058] 90 - cooling device;

[0059] 100 - air guide. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the preferred embodiments of the present application. In the drawings, the same or similar notations represent the same or similar parts or parts having the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, rather than all the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below with reference to the drawings.

[0061] The urban rail train usually includes multiple carriages connected in sequence, wherein the carriages at both ends of the train are trailers with driver's room, and the carriages between the trailers include motor cars with pantographs and motor cars without pantographs. The pantograph is used to electrically connect with the power supply side, and then transmit the electric energy from the power supply side to the traction system electrically connected with the pantograph. The traction system converts the electric energy obtained through the pantograph into mechanical energy, thereby pulling or braking the train.

[0062] In the related art, each device included in the traction system is usually installed at the bottom of the train in a split arrangement, i.e., each device is installed at the bottom of the train separately, and then electrically connected through a dedicated connector / cable to form a complete circuit to complete the transmission and conversion of electric energy. For example, a charger and an auxiliary inverter are installed under a trailer with a driver's room; a traction inverter, a filter reactor, a main disconnector, a bus disconnector, and a high-speed circuit breaker are installed under a motor car with a pantograph; a traction inverter, a filter reactor, a high-speed circuit breaker, a main disconnector, and an auxiliary inverter are installed under a motor car without a pantograph. Since electrical connection is required between devices installed under one car, and the devices of one car also need to be electrically connected with the devices of other cars, and in addition, the number of devices included in the traction system is very large, this results in a crowded, disordered layout, and complex wiring at the bottom of the train, increasing the difficulty of production assembly and later maintenance.

[0063] In view of this, the embodiments of the present application provide an integrated traction high-voltage box, which integrates a high-voltage unit, a pre-charging unit, an inverter unit, a filter unit, an emergency traction unit, a control unit, and a circuit detection unit into one cabinet, and interfaces are provided on the cabinet for electrical connection with units installed in other cars. The above-mentioned units are integrated in one cabinet and then installed at the bottom of the train, and then electrical connection with other cars is achieved through the dedicated interfaces on the cabinet, so that the layout at the bottom of the train is more reasonable and the wiring is simpler.

[0064] The integrated traction high-voltage box provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0065] The integrated traction high-voltage box provided by the embodiments of the present application includes a cabinet, and a high-voltage unit, a pre-charging unit, an inverter unit, a filter unit, an emergency traction unit, a control unit, and a circuit detection unit installed in the cabinet. The high-voltage unit, the pre-charging unit, the inverter unit, the filter unit, the emergency traction unit, the control unit, and the circuit detection unit are electrically connected inside the cabinet.

[0066] Among them, the lines for transmitting high-voltage electricity and the lines for transmitting low-voltage electricity are arranged separately inside the cabinet. For example, the lines for transmitting high-voltage electricity extend along the top of the cabinet, and the lines for transmitting low-voltage electricity extend along the bottom of the cabinet. In this way, high-voltage and low-voltage are separated, reducing the electromagnetic interference between high-voltage circuits and low-voltage circuits, and improving the reliability of the system.

[0067] The integrated traction high-voltage box provided in the application integrates the high-voltage unit, the pre-charging unit, the inverter unit, the filter unit, the emergency traction unit, the control unit and the circuit detection unit in the cabinet body, and then the cabinet body is installed at the bottom of the train, so that the integrated layout makes the bottom of the train more tidy and the layout simpler compared with the case where each unit is respectively installed at the bottom of the train. Moreover, the high-voltage unit, the pre-charging unit, the inverter unit, the filter unit, the emergency traction unit, the control unit and the circuit detection unit are electrically connected through copper bars or cables, and there is no need to separately set an interface for each unit, thereby reducing the number and types of the under-vehicle devices and the assembly difficulty. In addition, the wiring of each unit in the cabinet body is simpler, which facilitates the disassembly and maintenance of different units.

[0068] As shown in Figure 4 , the high-voltage unit can include a three-position switch 22, a train interconnection socket, an isolation diode 21, an auxiliary fuse 23, a high-speed circuit breaker 24. The pre-charging unit includes a line contactor, a pre-charging contactor 31, a charge / discharge resistor. The inverter unit includes a power module. The filter unit includes a filter reactance 51, a filter capacitor. The emergency traction unit includes an emergency power contactor. The circuit detection unit can include a voltage sensor 81, a current sensor 62. The control unit is mainly used for controlling the operation of each unit.

[0069] As shown in Figures 1 to 4 , the cabinet body structure forms an installation cavity inside, and each unit described above is installed in the installation cavity, thereby playing a supporting and protecting role on each unit installed in the installation cavity. The outer side of the cabinet body is provided with a mounting lug structure for mounting the cabinet body to the bottom of the train. For example, as shown in Figure 1 , the cabinet body is generally in a hollow cuboid structure, the hollow space inside the cabinet body is the installation cavity, and the opposite two edges of the top surface of the cabinet body are provided with mounting lugs, and through holes are formed in the lugs. The lugs are dragged and mounted on the vehicle body, and the bolts pass through the through holes to fasten the cabinet body to the bottom of the vehicle body.

[0070] Of course, the shape and mounting method of the cabinet body are not limited to this. In order to prevent the cabinet body from interfering with other structures of the train bottom, the cabinet body can be reasonably provided with a avoiding structure according to the structure of the train bottom, for example, the cabinet body can be a cornerless cuboid, a triangular prism or other shapes. The cabinet body can also be mounted on the bottom of the train by riveting.

[0071] In some possible implementation manners, the cabinet body can include a frame and door cover plates 12. The frame can be a three-dimensional structure formed by connecting a plurality of bars, and the plurality of bars form a plurality of openings after being connected. Each opening is covered by a door cover plate 12, so that the frame and the door cover plates 12 form an installation cavity. The bars can be made of high-strength materials, such as aluminum alloy, steel, etc. The door cover plates 12 are coverings, and the requirement for strength is relatively low, and the door cover plates 12 can be made of relatively thin plates. For example, a cuboid frame is formed by splicing a plurality of aluminum alloy profiles, and each opening of the cuboid frame is covered by a stainless steel plate. Compared with the cabinet body made of high-strength profiles, the cabinet body formed by the frame and the door cover plates 12 reduces the cost under the premise of ensuring the strength.

[0072] Optionally, the frame is formed by a plurality of stainless steel pieces connected by spot welding, and sealant is applied at each weld, which can improve the sealing performance of the cabinet body and prevent external dust from entering the cabinet body from the welds. Compared with the continuous welding mode, the mode of applying sealant at the weld after spot welding can ensure the sealing performance while reducing the cost.

[0073] The door cover plate 12 corresponding to the maintenance-free unit can be fixedly connected to the frame, for example, directly welded or riveted to the frame, which can improve the sealing performance of the cabinet body and save the hinged structure, thereby reducing the cost.

[0074] In some possible implementation manners, the installation cavity in the cabinet body is divided into a plurality of cavities, and each unit installed in the cabinet body is installed in a corresponding cavity. In this way, the units in the cabinet body can be arranged more orderly, and the maintenance and replacement of the units by the operating personnel can be more convenient.

[0075] A partition plate is arranged between different cavities, and the partition plate separates the units installed in different cavities, which can reduce the mutual influence between the units installed in different partitions. For example, some units have a relatively large heat generation, and some units are relatively sensitive to the temperature of the operating environment. The partition plate can reduce the influence of the unit with a large heat generation on the unit sensitive to the temperature.

[0076] As shown in FIG. 1, Figure 4 The installation cavity in the cabinet body includes a first cavity, an intermediate cavity, and a second cavity from top to bottom in the direction shown in the figure. The first cavity and the intermediate cavity and the intermediate cavity and the second cavity are both provided with partition plates, so that the cavities are relatively independent. The inverter unit includes a first power module 41 and a second power module 42. The first power module 41, the control unit, and the emergency traction unit are located in the first cavity. The second power module 42, the high-voltage unit, and the circuit detection unit are located in the second cavity. The pre-charge unit and the filter unit are located in the intermediate cavity.

[0077] Of course, the arrangement of the first cavity, the intermediate cavity and the second cavity can also be in other directions, for example, arranged in sequence from left to right or arranged in sequence from bottom to top, and the embodiments of the present application do not limit this.

[0078] The first cavity, the intermediate cavity and the second cavity can each include several partitions. For example, the first cavity includes a first power module partition, a low-voltage control partition, a control unit partition, and an emergency traction contactor partition. The intermediate cavity includes a first ventilation area 13, a pre-charge circuit partition, a reactance partition, and a high-voltage output partition. The second cavity includes a high-voltage partition, a high-speed circuit breaker partition, and a second power module partition.

[0079] The high-voltage partition is provided with a three-position switch 22 integrated with a workshop power socket, a current sensor 62, a diode 21, and a voltage sensor. The cabinet is provided with a high-voltage input interface corresponding to the high-voltage partition, and the high-voltage input interface is electrically connected with the pantograph.

[0080] The high-speed circuit breaker partition is provided with two high-speed circuit breakers 24, an insulating shield, and a copper bar.

[0081] The first power module partition is provided with a first power module 41. The second power module partition is provided with a second power module 42. After two power modules are arranged, when one of the power modules fails, the failed power module can be cut off, and the other power module still works normally, thereby improving the reliability of the integrated traction high-voltage box.

[0082] In some possible embodiments, a first dismounting opening for dismounting and mounting the first power module 41 is arranged on the outer wall of the cabinet parallel to the partition, and a first dismounting plate is arranged on the cabinet to block the first dismounting opening. A second dismounting opening for dismounting and mounting the second power module 42 is arranged on the outer wall of the cabinet parallel to the partition, and a second dismounting plate 123 is arranged on the cabinet to block the second dismounting opening. In this way, the first dismounting plate or the second dismounting plate 123 can be opened by the operator, and the power module can be repaired and replaced through the first dismounting opening or the second dismounting opening, thereby facilitating the operation. For example, as shown in FIG. 6, the upper edge of the second dismounting plate 123 is provided with two hinges, and the second dismounting plate 123 is hinged to the frame through the hinges. The mounting structure of the first dismounting plate can be the same as that of the second dismounting plate, and details are not described herein again. Figure 1

[0083] Of course, the connection form of the first dismounting plate and the second dismounting plate 123 with the frame is not limited to this, and a slide can also be arranged on the frame, and the first dismounting plate and the second dismounting plate 123 are slidably mounted on the slide of the frame, forming a structure similar to a sliding door, which also facilitates the repair and replacement of the operator.

[0084] ​Further, the locking member 121 and the handle 122 can be arranged on the first and / or second dismounting plates 123. The handle 122 is used for the operator to hold, so as to facilitate the opening and closing of the door cover plate 12. The locking member 121 is used to lock the frame and the first and second dismounting plates 123, so as to prevent people without operation authority from opening the first and second dismounting plates 123, and also prevent the first and second dismounting plates 123 from being opened automatically during the train operation, thereby improving the safety. In order to further improve the safety, a detection module is arranged between the first and second dismounting plates 123 and the frame. The detection module can detect the opening and closing state of the first and second dismounting plates 123 in real time, and alarm when the first and second dismounting plates 123 are opened in an abnormal state. For example, a travel switch is arranged on the frame. When the first and second dismounting plates 123 are closed, the travel switch is pressed and in a closed state. When the first and second dismounting plates 123 are opened, the travel switch is not pressed and in an open state. At this time, the running state of the train is detected, and an alarm is given when it is detected that the train is running.

[0085] The units in the cabinet body can be installed in the cabinet body through the push-pull support. The push-pull support is slidably installed on the frame and can be extended or retracted in the installation cavity through the opening, so that the units installed on the push-pull support can be exposed from the cabinet body, which can be more convenient for the maintenance and replacement of the operator.

[0086] A sealing member can be arranged between the first and / or second dismounting plates and the frame. For example, a sealing strip made of rubber or sponge is arranged at the joint between the first or second dismounting plate and the frame, which can further improve the sealing performance of the cabinet body and prevent dust and other impurities in the air from entering the cabinet body and affecting the operation of the units.

[0087] The high-voltage output interface is arranged on the cabinet body at a position corresponding to the high-voltage output partition, and is used to be electrically connected with the motor and the braking resistor.

[0088] The cooling device 90 is arranged in the first ventilation area 13 and is used to cool the units with high heat generation, so as to prevent the units from overheating and causing faults, and reduce the influence of the heat generated by the units with high heat generation on other units. The cooling device 90 can have various forms. For example, the cooling device 90 can adopt air cooling. For example, a cooling fan is arranged in the first ventilation area 13, and the cooling fan is rotated to discharge the hot air in the cabinet body. The cooling device 90 can also adopt liquid cooling. For example, a liquid cooling circuit is arranged. One side of the circuit is connected to the unit with high heat generation, and the other side of the circuit is exposed from the cabinet body and contacts with the external air. During operation, the heat generated by the unit is transferred to the air outside the cabinet body through the circulation of the liquid in the circuit. For the convenience of description, the cooling device 90 is taken as the cooling fan in the embodiment of the present application.

[0089] The low-voltage control partition is installed with a gate drive power supply 75, a contactor for a high-speed circuit breaker 24 and a resistor, a brake resistor box fan circuit breaker 76 and a contactor, a control unit circuit breaker, etc. A low-voltage control input interface is arranged on the cabinet corresponding to the low-voltage control partition, and the low-voltage control input interface is used for input of control voltage.

[0090] The control unit partition is installed with a control unit 73, a voltage conditioning board 72 and a control unit cooling fan 74.

[0091] The emergency traction contactor partition is installed with an emergency traction contactor unit 61, an isolation diode 21 assembly, an overvoltage absorption resistor and a capacitor. An emergency traction output interface is arranged on the cabinet corresponding to the emergency traction contactor partition, and the emergency traction output interface is used for electrical connection with a battery emergency traction box.

[0092] The pre-charge circuit partition is installed with two sets of line contactors, a pre-charge contactor 31, a charging resistor, a current sensor and an auxiliary fuse 23. A pre-charge unit output interface is arranged on the cabinet corresponding to the pre-charge circuit partition, and the pre-charge unit output interface is used for electrical connection with a traction auxiliary box and an auxiliary charging box.

[0093] The reactor partition is located inside the first ventilation area 13 and is installed with a filter reactor 51.

[0094] In addition, the cabinet is also provided with an auxiliary voltage output interface and a traction output interface. The auxiliary voltage output interface is used for electrical connection with a traction auxiliary box and an auxiliary charging box as high-voltage input of the auxiliary part. The traction output interface is used for electrical connection with a motor train without a pantograph, and inputs high-voltage power supply to the motor train without the pantograph.

[0095] The setting positions of the various partitions in the cabinet can be determined according to the heat generation of the units inside the partitions, for example, the partition where the unit with high heat generation is located can be arranged close to the first ventilation area 13, so that the shape of the first ventilation area 13 is more regular, thereby reducing the resistance of the air flow process and improving the cooling effect.

[0096] For example, Figure 1 and Figure 2As shown, the cabinet can be provided with an air inlet 15 and an air outlet 16, and the air inlet 15 and the air outlet 16 are connected to the first ventilation area 13. The cooling fan is installed at a position near the air outlet 16 in the first ventilation area 13. When the cooling fan is working, air enters the first ventilation area 13 from the air inlet 15, passes through the cooling fan and is discharged outside the cabinet from the air outlet 16. The air inlet 15 and the air outlet 16 can be set on opposite sides of the cabinet. For example, the air inlet 15 is set on the door cover 12 at the top of the cabinet, and the air outlet 16 is set on the door cover 12 at the bottom of the cabinet, so that air enters from the top of the cabinet and is discharged from the bottom of the cabinet, and the wind resistance of the air flow is smaller. In addition, the air inlet 15 can be set at one end of the first ventilation area 13 (the left end of the first ventilation area 13 as shown in the figure), and the air outlet 16 can be set at the other end of the first ventilation area 13 (the right end of the first ventilation area 13 as shown in the figure). In this way, the air inlet 15 and the air outlet 16 are respectively located at the two ends of the first ventilation area 13 , which increases the length of the air flow path and improves the cooling effect of the first ventilation area 13 .

[0097] Furthermore, there may be two air inlets 15 , a first air inlet is provided on the cabinet at a position facing the first power module 41 , and a second air inlet is provided on the cabinet at a position facing the second power module 42 .

[0098] In some possible implementations, such as Figure 4 As shown, the first power module 41 and the second power module 42 are symmetrically arranged on either side of the first ventilation zone 13. Both the first power module 41 and the second power module 42 partially extend into the first ventilation zone 13, with the first power module 41 located below the first air inlet and the second power module 42 located below the second air inlet. This allows air to enter the cabinet through the air inlet 15 and exchange heat with the first power module 41 and the second power module 42 extending into the first ventilation zone 13, thereby cooling the first power module 41 and the second power module 42.

[0099] In order to enable the first power module 41 and the second power module 42 to at least partially extend into the first ventilation area 13, a first opening can be provided on the partition between the first cavity and the intermediate cavity, and a second opening can be provided on the partition between the second cavity and the intermediate cavity. The first power module 41 extends into the first ventilation area 13 through the first opening, and the second power module 42 extends into the ventilation area 13 through the second opening.

[0100] Further, the first power module 41 and / or the second power module 42 can be mounted with a heat sink 411, which extends into the first ventilation area 13 at least partially through the first opening or the second opening. In this way, the heat generated by the first power module 41 and the second power module 42 can be transferred to the first ventilation area 13 through the heat sink 411, and discharged from the air outlet 16 under the action of the cooling fan, so as to achieve the effect of cooling the power module. The heat sink 411 can be a fin heat sink 411, such as an aluminum alloy profile heat sink 411.

[0101] Of course, the present application does not limit the positions of the air inlet 15 and the air outlet 16, as long as the air in the first ventilation area 13 can flow to cool other units.

[0102] The air inlet 15 and the air outlet 16 can be provided with a filter screen, and the air enters the first ventilation area 13 after being filtered by the filter screen, so as to prevent dust and other impurities in the air from being adsorbed in the units in the cabinet, thereby affecting the heat dissipation of the units.

[0103] As shown in Figure 3 , a wind guide 100 can be arranged at the air inlet 15, and the wind guide 100 is connected to one side of the air inlet 15 close to the inside of the cabinet, and the other end extends along the flow direction of the air. Since the air inlet 15 is arranged on the door cover plate 12, and the door cover plate 12 is usually a thin plate, the door cover plate 12 at the air inlet 15 is prone to vibrate under the disturbance of the air, thereby generating noise. After the wind guide 100 is arranged and connected at the air inlet 15, the rigidity of the door cover plate 12 at the air inlet 15 is improved, thereby reducing the vibration and reducing the noise. Moreover, the air entering from the air inlet 15 flows more smoothly under the guiding action of the wind guide 100, thereby reducing the disturbance to the door cover plate 12, and further reducing the noise.

[0104] The surface of the wind guide 100 facing the air inlet 15 can be an arc surface, and the concave direction of the arc surface is away from the air inlet 15. For example, as shown in Figure 4 , the wind guide plate is an arc-shaped plate structure. In this way, the air flows along the arc surface of the wind guide 100, and the air resistance when changing the flow direction is smaller. Of course, the shape of the wind guide plate is not limited to this, and can also be a flat plate structure.

[0105] The air outlet 16 can also be provided with a wind guide 100, and the shape and connection position of the wind guide 100 can be similar or the same as the wind guide 100 at the air inlet 15, which will not be described here.

[0106] In some possible implementations, the filter reactor 51 in the filter unit is installed in the first ventilation area 13. Since the filter reactor 51 generates a lot of heat, installing the filter reactor 51 in the first ventilation area 13 can better cool the filter reactor 51. For example, the cooling fan is installed on the door cover 12 provided with the air outlet 16, and the filter reactor 51 is installed on the side of the cooling fan close to the inside of the cabinet, and the filter reactor 51 is also arranged near the air outlet 16. In this way, the cooling fan and the filter reactor 51 are both arranged near the air outlet 16, and the operator can operate through the air outlet 16 during maintenance and replacement, which is more convenient.

[0107] like Figure 2 and Figure 4 As shown, in some possible embodiments, the cabinet further includes a second ventilation area 14, the second ventilation area 14 is located in the emergency traction contactor partition, and the isolation diode 21 is installed in the second ventilation area 14. A heat dissipation hole 17 is provided at the position of the isolation diode 21 in the second ventilation area 14. In this way, the cooling effect of the isolation diode 21 can be improved. For example, the door cover plate 12 corresponding to the top of the isolation diode 21 is provided with a heat dissipation hole 17, or the door cover plate 12 corresponding to the bottom of the isolation diode 21 is provided with a heat dissipation hole 17, or the door cover plate 12 corresponding to the bottom of the isolation diode 21 and the door cover plate 12 corresponding to the top are both provided with heat dissipation holes 17. The embodiment of the present application does not limit the location and number of the heat dissipation holes 17, as long as a continuous air flow path is formed and the isolation diode 21 is cooled.

[0108] In the description of the embodiments of the present application, it should be understood that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. The orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In the description of this application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0109] The terms "first", "second", "third", "fourth" and the like in the description and in the claims of the present application, if any, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the use of these terms herein is to be construed to cover the embodiments of the application whether or not the embodiments are described with the same term. For example, a reference to a "first" element is a reference to one element first described and is not necessarily an absolute reference to the timing of the elements. The terms "comprise", "have" and any variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises, has or includes a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0110] Finally, it should be noted that the above-described embodiments are merely intended to illustrate the technical solutions of the present application, but not to limit the same; even though the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not cause the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An integrated traction high-voltage box, characterized in that: It includes a cabinet body, and a high-voltage unit, a pre-charging unit, an inverter unit, a filter unit, an emergency traction unit, a control unit and a circuit detection unit installed in the cabinet body; The high-voltage unit, the pre-charging unit, the inverter unit, the filter unit, the emergency traction unit, the control unit, and the circuit detection unit are electrically connected inside the cabinet; Two parallel and spaced partitions are provided in the cabinet to divide the interior of the cabinet into a middle cavity, a first cavity located on both sides of the middle cavity, and a second cavity; The inverter unit includes a first power module and a second power module. The first power module, the control unit, and the emergency traction unit are located in a first cavity. The second power module, the high-voltage unit, and the circuit detection unit are located in a second cavity. The pre-charging unit and the filter unit are located in an intermediate cavity. The intermediate cavity includes a first ventilation area. The cabinet further includes a cooling device, wherein a first air inlet and a second air inlet are provided on the cabinet, wherein the first air inlet is provided opposite to the first power module, and the second air inlet is provided opposite to the second power module, a first opening is provided on the partition between the first cavity and the intermediate cavity, and a second opening is provided on the partition between the second cavity and the intermediate cavity; the first power module and the second power module are symmetrically provided on both sides of the first ventilation area, the first power module extends into the first ventilation area through the first opening, and the second power module extends into the first ventilation area through the second opening; The cooling device is arranged in the middle cavity, and the cabinet is provided with an air outlet connected to the middle cavity. The cooling device is used to drive air to enter through the first air inlet and the second air inlet, and to flow out of the air outlet through the middle cavity; A first disassembly opening for disassembling and installing the first power module is provided on an outer wall of the cabinet body parallel to the partition plate, and a first disassembly plate is hinged on the cabinet body, and the first disassembly plate is used to block the first disassembly opening; A second disassembly opening for disassembling and installing the second power module is provided on an outer wall of the cabinet body parallel to the partition board. A second disassembly plate is hinged on the cabinet body and is used to block the second disassembly opening.

2. The integrated traction high-voltage box according to claim 1, characterized in that: The first power module has a first heat sink facing the first opening, and the second power module has a second heat sink facing the second opening.

3. The integrated traction high-voltage box according to claim 1, characterized in that: The filter unit includes a filter inductor and a filter capacitor. The filter inductor is arranged in the middle cavity and faces the air outlet.

4. The integrated traction high-voltage box according to claim 1, characterized in that: An air guide is provided on one side of the air inlet and / or the air outlet close to the interior of the cabinet, and the air guide is used to guide the air inside the cabinet.

5. The integrated traction high-voltage box according to claim 1, characterized in that: The high-voltage unit includes an isolation diode, and a heat dissipation port is provided on the cabinet at a position facing the isolation diode.

6. The integrated traction high-voltage box according to claim 1, characterized in that: The first disassembly plate is further connected to the cabinet body via a first locking member, and the second disassembly plate is further connected to the cabinet body via a second locking member.

7. The integrated traction high-voltage box according to claim 1, characterized in that: A sealing member is provided between the first disassembly plate and / or the second disassembly plate and the cabinet body.

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