Direct current charging pile

Abstract

The invention discloses a direct current charging pile, and relates to the technical field of charging. According to the scheme, the fixed plate, the movable plate and the movable heat dissipation piece which are matched with each other are arranged on the ventilation windows on the two sides of the cabinet body; when the dust concentration of outdoor air is relatively low, the flow channel between the fixed plate and the movable plate is opened for air-cooling heat dissipation of the environment in the cabinet body; when the dust concentration of outdoor air is high, the flow channel between the fixed plate and the movable plate is closed, and the heat dissipation piece moves to the position in contact with the fixed plate, so that heat conduction and heat dissipation of the environment in the cabinet body are realized; the situation that when the environment in the cabinet body is cooled in windy weather, a large amount of dust easily enters the cabinet body, so that the heat dissipation efficiency and the use stability are reduced is avoided; in addition, a negative pressure cavity, a capillary core, a coolant and the like are arranged in the fixing plate, so that the cooling efficiency during heat conduction and heat dissipation is further improved, dust in the external environment in strong wind weather is prevented from invading, and efficient cooling is ensured.

Description

Technical Field

[0001] The present invention relates to the field of charging technology, and in particular to a direct current charging pile. Background Art

[0002] A DC charging pile is a charging device that provides DC power for electric vehicles. It directly charges the battery of an electric vehicle by converting AC power into DC power. The main core component of a DC charging pile is the charging module, which is used to convert AC power into DC power and provide a stable DC power supply for electric vehicles. It usually adopts a modular design, and multiple modules can be connected in parallel to achieve greater power output.

[0003] The charging module is the main source of heat inside the DC charging pile. Due to its high power and high working intensity, it will generate a lot of heat. The power devices (such as IGBT) inside the charging module will generate significant heat when running at high load. Whether the DC charging pile can work efficiently, stably and continuously is particularly important for the heat dissipation of the charging module. At present, air cooling is mostly used to cool and dissipate the internal components of the charging pile. In windy weather, outdoor dust is blown up, resulting in a significant increase in dust concentration in the air. If the DC charging pile adopts air cooling, the fan will suck air containing a lot of dust into the charging pile, causing dust to accumulate on the surface of the charging module and other electronic components. On the one hand, the adhesion of dust increases the thermal resistance and reduces the heat dissipation efficiency; on the other hand, it will reduce the insulation performance of electronic components and increase the risk of short circuit, which is not conducive to the reliable and stable operation of the charging pile.

[0004] Therefore, how to provide a DC charging pile that can prevent the air with high outdoor dust concentration from entering the charging pile along with the airflow during windy weather while ensuring the cooling effect has become a technical problem that needs to be urgently solved in the field of charging pile cooling. Summary of the invention

[0005] The purpose of the present invention is to provide a DC charging pile, aiming to improve the problem that when the dust concentration in the outdoor air is high, the use of air cooling to dissipate heat easily causes a large amount of dust to invade the interior of the charging pile, resulting in reduced heat dissipation efficiency and reduced safety of use.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the present application provides a DC charging pile, which has an X direction, a Y direction and a Z direction intersecting each other, including: The cabinet has a placement cavity and a heat exchange cavity connected to each other. In the X direction, the placement cavity and the heat exchange cavity are arranged in sequence, and the placement cavity is used to place the charging module; An air cooling module is arranged in the heat exchange cavity; At least two ventilation windows are provided, and at least two ventilation windows are respectively provided on two side walls of the cabinet along the X direction; the ventilation window has a closed position and an open position; the ventilation window is in the closed position for sealing the cabinet; the ventilation window is in the open position for connecting the cabinet with the outside; and A heat sink is at least partially movably disposed in the heat exchange cavity, and the heat sink is in contact with the charging module, and the heat sink is disposed on the side of the air-cooling module away from the charging module; the heat sink has a first position close to the charging module, and a second position in contact with one of the ventilation windows; when the ventilation window is in the open position, the heat sink is in the first position for air-cooling the charging module; when the ventilation window is in the closed position, the heat sink is in the second position for heat conduction and heat dissipation of the charging module.

[0007] In one embodiment, the heat sink comprises: a cooling box, disposed in the placement cavity, for containing the charging module and a coolant so that the charging module is immersed in the coolant; and A heat sink is disposed in the heat exchange cavity on the side of the air cooling module away from the cooling box. In the X direction, the heat sink is movable in the heat exchange cavity. The heat sink has a liquid inlet and a liquid outlet connected to the cooling box. The pump body is arranged on the cooling box, and the pump body allows the cooling liquid to circulate between the cooling box and the radiator through the liquid inlet and the liquid outlet.

[0008] In one embodiment, the heat sink comprises: A frame body is movably disposed in the heat exchange cavity; and A heat dissipation pipe extends along the Y direction and is installed on the frame. There are multiple heat dissipation pipes, and the multiple heat dissipation pipes are arranged at intervals along the Z direction; two adjacent heat dissipation pipes are connected end to end; one of the two heat dissipation pipes at the two ends of the Z direction is provided with the liquid inlet, and the other is provided with the liquid outlet.

[0009] In one embodiment, the heat sink further comprises: a first telescopic tube extending along the X direction, the first telescopic tube having a first fixed portion and a first movable portion that are connected to each other, the first movable portion being movable along the X direction; the first fixed portion being used to communicate with the cooling box, and the first movable portion being used to communicate with one of the liquid inlet and the liquid outlet; and The second telescopic tube extends along the X direction. The second telescopic tube has a second fixed end and a second movable part that are connected and communicate with each other. The second movable part can move along the X direction. The second fixed end is used to communicate with the cooling box, and the second movable part is used to communicate with the other one of the liquid inlet and the liquid outlet. The pump body is arranged on the first telescopic tube and / or the second telescopic tube.

[0010] In one embodiment, the DC charging pile further includes cabinet doors that are openable and closable on both sides of the cabinet along the X direction. The ventilation window is correspondingly arranged on the cabinet door. The ventilation window includes: A frame, which is installed on the cabinet door. Along the X direction, the frame is provided with mounting holes that penetrate through it; and A fixing plate that extends along the Y direction and is arranged in the mounting hole. There are multiple fixing plates, and the multiple fixing plates are spaced apart along the Z direction; A movable plate that is rotatably installed between two adjacent fixing plates to form a flow channel that communicates the cabinet and the outside between the adjacent fixing plates and the movable plate. The movable plate has a contact position in contact with the fixing plate and a separation position separated from the fixing plate. When the movable plate is in the contact position, the flow channel is closed, and the ventilation window is in the closed position. When the movable plate is in the separation position, the flow channel is opened, and the ventilation window is in the open position; Both the movable plate and the fixing plate are heat-conducting structural members.

[0011] In one embodiment, the fixing plate includes: A first fixed plate; and Two second fixed plates. The two second fixed plates are correspondingly connected to both ends of the first fixed plate, and the two second fixed plates extend away from the first fixed plate in opposite directions; The movable plate includes: A first movable plate that is rotatably installed in the mounting hole, and the rotation axis of the first movable plate extends along the Y direction; and Two second movable plates. The two second movable plates are correspondingly connected to both ends of the first movable plate, and the two second movable plates extend away from the first movable plate in opposite directions; Both the movable plate and the fixing plate are arranged in a Z shape so that when the movable plate is in the separated position, the flow channel is in a Z shape.

[0012] In one embodiment, the cross section of the heat dissipation tube is rectangular, and the heat dissipation tube is rotatably installed on the frame body, and the rotation axis of the heat dissipation tube extends along the Y direction; When the heat sink is in the first position, each heat dissipation tube is arranged horizontally; when the heat sink is in the second position, the heat dissipation tube is rotated by a preset angle so that at least a portion of the heat dissipation tube toward the cabinet door is in corresponding contact with the second fixed plate close to the cabinet space.

[0013] In one embodiment, the fixing plate has a negative pressure cavity arranged along its contour, and a capillary core is attached to the inner wall of the negative pressure cavity; A channel is formed on one side of the capillary core away from the negative pressure chamber wall. A coolant is stored in the capillary core. The coolant can be converted between a liquid state and a gaseous state within a preset temperature range.

[0014] In one embodiment, when the movable plate is in the contact position, the second fixed plate close to the cabinet space is at least partially encapsulated in the cabinet space, and the second fixed plate away from the cabinet space is at least partially not in contact with the cabinet space.

[0015] In one embodiment, the DC charging pile further includes a partition disposed between the charging module and the air cooling module, wherein the partition divides the space inside the cabinet into the placement cavity and the heat exchange cavity; In the X direction, the partition is penetrated with a through hole for connecting the placement cavity and the heat exchange cavity, and the air cooling module is arranged at a position corresponding to the through hole.

[0016] Compared with the prior art, the DC charging pile of the embodiment of the present invention has the following beneficial effects: the present solution arranges matching fixed plates and movable plates, as well as movably arranged heat sinks on the cabinet ventilation window; thereby, when the dust concentration of outdoor air is low (light breeze), the flow channel between the fixed plate and the movable plate is in an open state, which is used to perform air cooling and heat dissipation on the cabinet environment; when the dust concentration of outdoor air is high (strong wind), the flow channel between the fixed plate and the movable plate is in a closed state, and the heat sink is moved to a contact position with the fixed plate, thereby achieving heat conduction and heat dissipation of the cabinet environment; better This avoids the situation where a large amount of dust easily enters the cabinet when cooling the environment inside the cabinet in windy weather, resulting in reduced heat dissipation efficiency and usage stability; at the same time, the flow channel between adjacent fixed plates and movable plates is set in a Z shape when in the open state, thereby achieving air cooling and heat dissipation for the environment inside the cabinet while preventing dust and debris in the external environment from entering the cabinet; in addition, by arranging a negative pressure cavity, a capillary core, a coolant, etc. in the fixed plate, the cooling and heat dissipation efficiency when heat conduction heat is dissipated in the cabinet environment is further improved, while preventing the invasion of dust from the external environment in windy weather, high-efficiency cooling is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall structure of a DC charging pile according to an embodiment of the present invention; Figure 2 In the present invention Figure 1 Schematic diagram of the structure from another perspective; Figure 3 In the present invention Figure 2 Front view schematic diagram of the structure; Figure 4 Schematic diagram of the connection relationship between the cabinet door and the ventilation window according to an embodiment of the present invention; Figure 5 In the present invention Figure 4 Schematic diagram of the separation of the ventilation window and the cabinet door; Figure 6 Schematic diagram of the ventilation window in the open position according to an embodiment of the present invention; Figure 7 Schematic diagram of the ventilation window in the closed position according to an embodiment of the present invention; Figure 8 Schematic diagram of the heat dissipation member in the first position according to an embodiment of the present invention; Figure 9 In the present invention Figure 8 Schematic diagram of the structure from another perspective; Figure 10 Schematic diagram of the heat dissipation member in the second position according to an embodiment of the present invention; Figure 11 Schematic diagram of the contact and cooperation between the heat dissipation member in the second position and the ventilation window according to an embodiment of the present invention; Figure 12 In the present invention Figure 11 Enlarged schematic diagram of the structure at A; Figure 13 Schematic diagram of the connection relationship of the heat dissipation pipes according to an embodiment of the present invention; Figure 14 Schematic diagram of the internal structure of the fixing plate according to an embodiment of the present invention.

[0018] In the figure, 1, cabinet; 11, placement cavity; 12, heat exchange cavity; 13, cabinet door; 131, ventilation hole; 14, partition; 15, charging gun; 2, air-cooling module; 3, ventilation window; 31, frame; 311, mounting hole; 32, fixing plate; 321, first fixing plate; 322, second fixing plate; 323, negative pressure cavity; 33, movable plate; 331, first movable plate; 332, second movable plate; 34, flow channel; 4. Heat dissipation component; 41. Cooling box; 42. Heat dissipation row; 421. Frame body; 422. Heat dissipation pipe; 4221. Hollow shaft; 423. First communication pipe; 4231. Rotating joint; 424. Second communication pipe; 43. Pump body; 44. First telescopic pipe; 441. First fixing part; 442. First movable part; 45. Second telescopic pipe; 451. Second fixing part; 452. Second movable part; 5. First driving part; 51. First rack; 52. First gear; 53. First electric push rod; 6. Second driving part; 61. Second rack; 62. Second gear; 63. Second electric push rod; 7. Capillary wick. Specific implementation manner

[0019] The following combines the drawings and embodiments to further describe in detail the specific implementation manner of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. It should be understood that the present invention uses the terms "first", "second", etc. to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information can also be called "second" information, and similarly, "second" information can also be called "first" information.

[0021] The core component inside a DC charging pile is the charging module, which is also the main heat source inside the DC charging pile. Due to its high power and high working intensity, a large amount of heat is generated. The power devices (such as IGBTs) inside the charging module generate significant heat during high-load operation. Whether the DC charging pile can work efficiently, stably, and continuously is particularly important for the heat dissipation of the charging module. Currently, most DC charging piles use air-cooling to dissipate heat from the components inside the charging pile (charging module, related control modules). When the charging pile is charging on a windy day, the strong wind picks up dust on the ground and mixes it into the moving air, resulting in a significant increase in the dust concentration in the air. If the DC charging pile uses air-cooling, the fan will suck the air containing a large amount of dust into the charging pile, causing dust to accumulate on the surfaces of the charging module and other electronic components. On the one hand, the attachment of dust increases the thermal resistance, leading to a decrease in the heat dissipation efficiency. On the other hand, it reduces the insulation performance of electronic components and increases the risk of short circuits, which is not conducive to the reliable and stable operation of the charging pile. Based on the above, the embodiments of the present application provide a DC charging pile to solve the above problems.

[0022] Referring to Figures 1 - 14 As shown, the embodiments of the present application propose a DC charging pile with mutually intersecting X, Y, and Z directions, including a cabinet 1, an air-cooling module 2, ventilation windows 3, and a heat dissipation member 4. Charging guns 15 are respectively provided on both sides of the cabinet 1; as Figure 2 、 Figure 3 shown, the cabinet 1 has a connected placement cavity 11 and a heat exchange cavity 12, which are arranged in sequence in the X direction. The placement cavity 11 is used to place the charging module and install other control module units that cooperate with the charging module. The air-cooling module 2 is provided in the heat exchange cavity 12. The air-cooling module 2 can be a fan, that is, the charging module, the related control module unit, and the air-cooling module 2 are respectively located on both sides inside the cabinet 1. At least two ventilation windows 3 are provided. When two ventilation windows 3 are provided, the two ventilation windows 3 are respectively provided on the side walls at both ends of the cabinet 1 along the X direction. When there are more than two ventilation windows 3, at least one ventilation window 3 is respectively provided on the side walls at both ends of the cabinet 1 along the X direction, and the remaining ventilation windows 3 can be set at appropriate positions on the side walls of the cabinet 1 along the Y direction (the specific setting position can be set accordingly according to the placement position of the components inside the cabinet 1). The ventilation window 3 has a closed position and an open position. When the ventilation window 3 is in the closed position, the environment inside the cabinet 1 is not connected to the outside environment. Through the forced convection of the air-cooling module 2, the outside air with a lower temperature is sent into the cabinet 1 through the open ventilation window 3 to achieve air-cooling of the charging module and related control modules inside the cabinet 1. When the ventilation window 3 is in the closed position, the environment inside the cabinet 1 is isolated from the outside environment and is used to seal the cabinet 1.

[0023] In this embodiment, the heat dissipation member 4 is at least partially movably disposed in the heat exchange cavity 12, and the heat dissipation member 4 is in contact with the charging module. The heat dissipation member 4 is disposed in the heat exchange cavity 12 on the side of the air cooling module 2 away from the charging module. The heat dissipation member 4 has a high heat conduction efficiency. By contacting the heat dissipation member 4 with the charging module, the heat generated when the charging module works can be quickly transferred to the heat dissipation member 4, and the cold air flow in the external environment is passed through the heat dissipation member 4 by the operation of the air cooling module 2 for heat exchange with the heat transferred to the heat dissipation member 4, and finally discharged to the external environment as the air flow moves, thereby realizing high-efficiency heat dissipation of the charging module; Exemplarily, the relevant control module for working in cooperation with the charging module can also be in contact with the heat dissipation member 4 to realize cooling and heat dissipation of the relevant control module; Since the heat generated when the relevant control module works is much lower than the heat generated when the charging module works, the heat dissipation of the DC charging pile mainly focuses on the charging module.

[0024] In this embodiment, as Figure 8 shown, the heat dissipation member 4 has a first position close to the charging module. At this time, the heat dissipation member 4 is relatively close to the charging module, so that the heat generated when the charging module works can be transferred to the heat dissipation member 4 in a timely and rapid manner, significantly improving the heat conduction efficiency. The close contact can reduce the loss of heat to other spatial areas in the cabinet 1 during the heat transfer process, ensuring that the heat can be quickly transferred from the charging module to the heat dissipation member 4 and then through the forced convection of the air cooling module 2, so that the air flows through the heat dissipation member 4, thereby accelerating the heat dissipation on the surface of the heat dissipation member 4. The air flow provided by the air cooling module 2 quickly takes away the heat on the heat dissipation member 4, thereby significantly improving the heat dissipation efficiency of the charging module and ensuring that the charging module remains within the safe operating temperature range during high-power operation; Thus, when the wind force in the external environment is small, at this time, dust, dirt, etc. in the external environment are basically in a deposited state, and the dust content in the air is low. At this time, the air cooling heat dissipation method is adopted for the charging pile; that is, the ventilation window 3 is in the open position, and the heat dissipation member 4 is in the first position on the side close to the charging module, and then the air cooling module 2 is started to realize the forced convection of the air inside the cabinet 1 and the external environment, thereby realizing high-efficiency heat dissipation of the charging module.

[0025] In this embodiment, when the wind force in the external environment is relatively large, dust and dirt deposited on the road surface and other attachments will be blown into the air, resulting in a significant increase in the dust content in the air. At this time, if the air-cooled heat dissipation method is still used to dissipate heat inside the charging pile, under the forced convection of the air-cooling module 2, a large amount of dusty air will be sent into the charging pile, causing a large amount of dust to adhere to the surfaces of the charging module and related control modules. Since the dust adheres and has a very low thermal conductivity, when the dust adheres to the surface of the charging module, an insulating layer will be formed, hindering the conduction of heat and significantly increasing the thermal resistance (even a dust layer only a few millimeters thick may increase the thermal resistance several times). The increase in thermal resistance will cause the heat to not be dissipated in time, resulting in an increase in the temperature of the charging module. If the temperature exceeds the safe range, it may lead to a decline in equipment performance or even cause a malfunction; at the same time, a large amount of dust adheres to the surface of the charging module, especially in areas such as electronic components, connectors, and terminal blocks. The dust may form a conductive path. If these paths are connected to different potential points, a short circuit may occur; at this time, it is necessary to adjust the heat dissipation method of the charging pile; that is, to adjust the ventilation window 3 from the open position to the closed position, so as to isolate the environment inside the cabinet 1 from the external environment, making the charging module and related control modules inside the cabinet 1 in a relatively sealed environment; then control the heat dissipation component 4 to move from the first position to the second position (from the position shown in Figure 9 to the position shown in Figure 10 ), that is, to move the heat dissipation component 4 towards the ventilation window 3 corresponding to it (that is, away from the charging module side) and make the heat dissipation component 4 contact the corresponding ventilation window 3 (that is, make the side wall of the ventilation window 3 facing the space inside the cabinet 1 contact the heat dissipation component 4), as shown in Figure 11 . At this time, the heat generated when the charging module works is quickly transferred and transferred to the ventilation window 3 under the action of the heat dissipation component 4. The other side of the ventilation window 3 is exposed to the external environment. At this time, the side wall of the ventilation window 3 facing the space inside the cabinet 1 contacts the heat dissipation component 4 and has a relatively high temperature, and the other side wall of the ventilation window 3 is exposed to the external environment; thus, heat transfer (heat exchange) is used to make the heat transferred to the ventilation window 3 and the high-speed air flow flowing outside the ventilation window 3. Under the action of the strong wind outside, the heat transferred from the heat dissipation component 4 to the ventilation window 3 is quickly transferred away and dissipated to the outside with the fast-moving air flow. Furthermore, through the cooperation of the heat dissipation component 4 and the ventilation window 3, it is used to dissipate heat from the charging module inside the cabinet 1 when the environment inside the cabinet 1 is isolated from the external environment.

[0026] In this embodiment, when the outdoor wind force is small (the dust concentration in the external air is low), the ventilation window 3 is in the open position and the heat dissipation member 4 is in a position close to the charging module (the heat generated during the operation of the charging module can be quickly transferred to the heat dissipation member 4), and an air-cooling heat dissipation method is adopted to quickly dissipate the heat of the heat dissipation member 4, thereby achieving high-efficiency cooling of the charging module; when the outdoor wind force is large (the dust concentration in the external air is large), the ventilation window 3 is in the closed position (isolating the space inside the cabinet 1 from the external environment), and the heat dissipation member 4 and the corresponding ventilation window 3 are in contact with one side wall of the space inside the cabinet 1, so as to cool and dissipate the heat of the charging module by heat conduction, avoiding a large amount of dust in the air from entering the cabinet 1 during strong wind weather.

[0027] Exemplarily, regardless of whether the charging pile is performing a charging operation, in the event of strong wind weather, the ventilation window 3 can be in the closed position, isolating the environment inside the cabinet 1 from the external environment, so that the charging module and other related control modules inside the cabinet 1 are in a relatively sealed environment. Since the charging pile is not performing a charging operation at this time, only some electronic devices in the charging module and the control module are working (to maintain the basic functions and standby state of the charging pile, and the heat generation inside the charging pile is small at this time), and heat conduction is sufficient to cool and dissipate the heat; at this time, the heat dissipation member 4 and the ventilation window 3 can be in contact or not. Preferably, contacting the heat dissipation member 4 with the ventilation window 3 can improve the cooling effect of the internal environment of the charging pile when the charging pile is not performing a charging operation.

[0028] Refer to Figure 3 、 Figure 8 、 Figure 9 As shown in the figure, in an embodiment of the present application, the heat dissipation member 4 includes a cooling box 41, a heat dissipation row 42, and a pump body 43; wherein, the cooling box 41 is fixedly installed in the placement cavity 11 for accommodating the charging module, that is, the charging module is placed in the cooling box 41, and at the same time, a coolant is filled in the cooling box 41, and the coolant completely fills the internal space of the cooling box 41 so that the charging module is completely immersed in the coolant; Exemplarily, the coolant can be hydrocarbons (such as mineral oil, synthetic oil, etc.), silicone-based (such as silicone oil), etc.; the heat dissipation row 42 is arranged in the heat exchange cavity 12 on the side of the air-cooling module 2 away from the cooling box 41, and in the X direction, the heat dissipation row 42 is movably connected in the heat exchange cavity 12, so that the heat dissipation row 42 can move close to the charging module (so that the heat dissipation member 4 is in the first position), or can move towards the corresponding ventilation window 3 (so that the heat dissipation member 4 is in the second position); the heat dissipation row 42 is a structural member with a high thermal conductivity and the heat dissipation row 42 is provided with a liquid inlet and a liquid outlet communicating with the cooling box 41, and the pump body 43 is arranged on the cooling box 41, and the coolant in the cooling box 41 is transported to the heat dissipation row 42 through the pump body 43 through the liquid inlet, and then flows back to the cooling box 41 through the liquid outlet.

[0029] In this embodiment, the charging module is completely immersed in the coolant, that is, any part of the charging module can be in contact with the coolant. Thus, when it performs the charging operation, the heat generated by it can be quickly transferred to the coolant (the charging module is directly in contact with the coolant, reducing the thermal resistance, and the heat can be quickly transferred to the coolant). The coolant has a high thermal conductivity (the thermal conductivity of mineral oil is about 0.14 - 0.16 W / (m·K), which is much higher than that of air at 0.026 W / (m·K)), and can quickly absorb and transfer the heat generated by the charging module. Under the action of the pump body 43, the coolant in the cooling tank 41 is continuously sent into the heat dissipation row 42 through the liquid inlet. When the coolant carrying a large amount of heat flows through the heat dissipation row 42, it is absorbed by the forced air flow generated when the air cooling module 2 works, and is discharged out of the cabinet body 1 along with the flow of the air flow. The temperature of the coolant after heat exchange with the air flow decreases and then returns to the cooling tank 41 again through the liquid discharge port. The above process is repeated cyclically, so that the coolant at a higher temperature flows through the heat dissipation row 42 for cooling, and then the cooled coolant returns to the cooling tank 41 again, so that the coolant circulates between the cooling tank 41 and the heat dissipation row 42, thereby realizing efficient cooling and heat dissipation of the charging module immersed in the coolant.

[0030] In this embodiment, when the air cooling heat dissipation mode is adopted for heat dissipation, the reason for placing the heat dissipation row 42 at the first position close to the charging module is as follows: The farther the heat dissipation row 42 is from the cooling tank 41, the longer the pipeline required for the coolant to circulate and return. The increase in the pipeline length will lead to an increase in resistance (the coolant will be subject to frictional resistance when flowing in the pipeline, and the longer the pipeline, the greater the resistance; this will reduce the flow rate of the coolant, thereby slowing down the return speed) and pressure loss (the long pipeline will cause greater pressure loss, and a greater pump pressure is required to maintain the same flow rate). Moreover, during the flow in the long pipeline, the coolant may exchange heat with the surrounding environment, resulting in a temperature rise, which will reduce the heat dissipation efficiency of the coolant, because when its temperature approaches the ambient temperature, the heat dissipation capacity will weaken; in addition, the long pipeline will cause a delay in heat transfer, because the longer the pipeline, the longer the return time of the coolant, resulting in the heat generated by the charging module not being able to be taken away from the cooling tank 41 in time, which may cause the temperature in the cooling tank 41 to rise and affect the heat dissipation efficiency; based on the above, when the air cooling heat dissipation method is adopted to cool the coolant flowing through the heat dissipation row 42 in this embodiment, the heat dissipation row 42 should be as close to the cooling tank 41 as possible to improve the heat dissipation efficiency of the charging module.

[0031] Refer to Figure 8 、 Figure 9 、 Figure 10As shown, in an embodiment of the present application, the heat dissipation row 42 includes a frame body 421 and heat dissipation pipes 422. Among them, the frame body 421 is movably connected in the heat exchange cavity 12 along the X direction. Exemplarily, an electric rod (not shown in the figure) for driving the frame body 421 to move along the X direction is provided in the heat exchange cavity 12, so that the fixed end of the electric rod is fixedly installed at a suitable position in the heat exchange cavity 12 (such as on the side wall of the heat exchange cavity 12), and then the telescopic end of the electric rod is fixedly connected to the frame body 421. By controlling the telescopic movement of the electric rod, the frame body 421 can be driven to move in the heat exchange cavity 12, so as to drive the frame body 421 to transfer between the first position and the second position. For example Figure 9 , 10 As shown, the heat dissipation pipes 422 extend along the Y direction, and both ends of the heat dissipation pipes 422 along the Y direction are rotatably installed on the frame body 421. There are multiple heat dissipation pipes 422, and the multiple heat dissipation pipes 422 are arranged at intervals along the Z direction. The head and tail ends of two adjacent heat dissipation pipes 422 in the Z direction are connected in sequence, so that a heat exchanger is formed by the multiple heat dissipation pipes 422 (the heat dissipation pipes 422 are made of materials with high thermal conductivity, such as aluminum-based composite materials, copper, etc.), and the coolant circulates between the cooling tank 41 and the above-mentioned heat exchanger; among the two heat dissipation pipes 422 at both ends in the Z direction, that is, one of the heat dissipation pipes 422 at the uppermost and the lowermost is provided with a liquid inlet, and the other is provided with a liquid outlet. The liquid inlet and the liquid outlet are respectively communicated with the cooling tank 41, so as to drive the coolant to circulate between the cooling tank 41 and the heat exchanger composed of multiple heat dissipation pipes 422 under the action of the pump body 43, for cooling the coolant in the cooling tank 41, so that the cooled coolant flows back to the cooling tank 41, and can better absorb the heat generated when the charging module works.

[0032] In this embodiment, the liquid inlet can be communicated with the top position of the cooling tank 41, and the liquid outlet can be communicated with the bottom position of the cooling tank 41, that is, the liquid outlet position of the cooling tank 41 is set at the top and the liquid inlet position is set at the bottom, so as to utilize the natural convection of the coolant; because when the coolant absorbs heat, its temperature rises and its density decreases, so it naturally rises; on the contrary, the density of the coolant is relatively large and it will naturally drop. This natural convection phenomenon can promote the circulation of the coolant in the cooling tank 41. In this embodiment, the liquid inlet of the heat dissipation row 42 is communicated with the bottom of the cooling tank 41, and the liquid outlet is communicated with the top of the cooling tank 41, so as to utilize the circulation of the coolant in the cooling tank 41 to form a natural circulation path in the cooling tank 41, and can ensure the full and uniform flow of the coolant in the cooling tank 41, and uniformly absorb the heat generated by the charging module.

[0033] In this embodiment, when the coolant carrying heat flows through the heat exchanger composed of a plurality of radiating tubes 422 under the action of the pump body 43, forced convection generated when the air-cooling module 2 works causes heat exchange between the air flow and the coolant flowing through the radiating tubes 422, thereby achieving highly efficient cooling of the coolant.

[0034] Referring to Figure 10 As shown, in an embodiment of the present application, the heat dissipation member 4 further includes: a first telescopic tube 44 and a second telescopic tube 45; wherein, the first telescopic tube 44 extends along the X direction, and the first telescopic tube 44 has a first fixed portion 441 and a first movable portion 442 that are connected to each other, that is, the first movable portion 442 can move relative to the first fixed portion 441 along the X direction; exemplarily, the diameter of the first movable portion 442 can be set slightly smaller than the diameter of the first fixed portion 441, so that the first movable portion 442 can pass through the first fixed portion 441, and a sealing ring is provided at one end of the first movable portion 442 inserted into the first fixed portion 441 to ensure that no leakage occurs when the coolant flows between the first fixed portion 441 and the first movable portion 442 (improve the sealing performance); the second telescopic tube 45 also extends along the X direction, and the second telescopic tube 45 has a second fixed portion 451 and a second movable portion 452 that are connected to each other, that is, the second movable portion 452 can move relative to the second fixed portion 451 along the X direction; exemplarily, the diameter of the second movable portion 452 can be set slightly smaller than the diameter of the second fixed portion 451, so that the second movable portion 452 can pass through the second fixed portion 451, and a sealing ring is provided at one end of the second movable portion 452 inserted into the second fixed portion 451 to ensure that no leakage occurs when the coolant flows between the second fixed portion 451 and the second movable portion 452 (improve the sealing performance).

[0035] In this embodiment, one of the first telescopic tube 44 and the second telescopic tube 45 is used to communicate with the liquid inlet, and the other is used to communicate with the liquid outlet, that is, one of the first movable portion 442 and the second movable portion 452 is used to communicate with the liquid inlet, and the other is used to communicate with the liquid outlet; as Figure 3 shown, exemplarily, the first telescopic tube 44 is communicated with the top of the cooling tank 41, the second telescopic tube 45 is communicated with the bottom of the cooling tank 41, and the position where the second telescopic tube 45 is communicated with the bottom of the cooling tank 41 and the position where the first telescopic tube 44 is communicated with the top of the cooling tank 41 are respectively located at both ends of the cooling tank 41 along the X direction. With this setting, the coolant that has completed heat exchange can flow more fully and evenly in the cooling tank 41, so as to improve the heat dissipation efficiency of the coolant for the charging module.

[0036] In this embodiment, when the air-cooling heat dissipation method is adopted for heat dissipation, the electric rod connected to the frame body 421 drives the frame body 421 and makes it in the first position close to the cooling tank 41, asFigure 8 , Figure 9 As shown, at this time, the first movable part 442 extends out of the first fixed part 441 by a small distance, and the second movable part 452 extends out of the second fixed part 451 by a small distance, so that the lengths of the first telescopic tube 44 and the second telescopic tube 45 are also at a relatively small level, thereby making the moving path distance of the coolant flowing from the cooling tank 41 to the plurality of heat dissipation tubes 422 at a relatively small level; thus, when the coolant flows in the first telescopic tube 44 and the second telescopic tube 45, the frictional resistance it receives is reduced, and it will not have a great impact on the circulating flow rate of the coolant. At the same time, since the first telescopic tube 44 and the second telescopic tube 45 are in a relatively short state, the coolant can circulate rapidly between the cooling tank 41 and the heat dissipation tubes 422, that is, the return time of the coolant is shortened, so that the heat generated by the charging module can be taken away by the coolant in a timely and rapid manner, thereby ensuring high-efficiency heat dissipation for the charging module.

[0037] In this embodiment, the pump body 43 can be arranged on the first fixed part 441, or on the second fixed part 451, or pump bodies 43 are provided on both the first fixed part 441 and the second fixed part 451. The two pump bodies 43 transport the coolant in the same direction, so as to provide a greater transport speed, making the coolant circulate faster between the cooling tank 41 and the heat dissipation tubes 422 to improve the heat dissipation efficiency of the charging module; as Figure 3 shown, since the first telescopic tube 44 and the second telescopic tube 45 are respectively arranged at the upper and lower ends of the cooling tank 41, the air-cooling module 2 can be arranged between the first telescopic tube 44 and the second telescopic tube 45 to make full use of the space in the heat exchange cavity 12.

[0038] Exemplarily, one end of the first movable part 442 extending out of the first fixed part 441 and one end of the second movable part 452 extending out of the second fixed part 451 can be fixedly installed on the frame body 421. When the frame body 421 moves along the X direction in the heat exchange cavity 12 under the driving action of the electric rod, it can synchronously drive the first movable part 442 and the second movable part 452 to perform telescopic movement relative to the first fixed part 441 and the second fixed part 451 to ensure the connection stability between the first movable part 442, the second movable part 452 and the liquid inlet and the liquid outlet.

[0039] Referring to Figure 1 , Figure 2 , Figure 4 , Figure 5 shown, in an embodiment of the present application, the DC charging pile further includes cabinet doors 13 that can be opened and closed on both sides of the cabinet body 1 along the X direction, and ventilation windows 3 are correspondingly arranged on the cabinet doors 13; among them, the ventilation window 3 includes a frame 31, a fixing plate 32 and a movable plate 33; as Figure 5As shown, a ventilation hole 131 for installing the frame 31 is provided through the cabinet door 13 along the X direction, so that the frame 31 is fixedly installed in the ventilation hole 131 under the action of fasteners; as Figure 6 , Figure 7 shown, an installation hole 311 for installing the fixed plate 32 and the movable plate 33 is provided through the frame 31 along the X direction; as Figure 5 shown, both the fixed plate 32 and the movable plate 33 extend along the Y direction. There are multiple fixed plates 32, and the multiple fixed plates 32 are fixedly installed in the installation hole 311 at intervals along the Z direction. There are also multiple movable plates 33, and one movable plate 33 is provided between two adjacent fixed plates 32. The movable plate 33 is rotatably installed on the wall of the installation hole 311 between two adjacent fixed plates 32, so that a flow channel 34 is formed between the adjacent movable plate 33 and the fixed plate 32. The flow channel 34 is used to connect the space inside the cabinet body 1 with the external environment; as Figure 7 shown, the movable plate 33 has a contact position in contact with the fixed plate 32. At this time, the flow channel 34 is blocked through the cooperation of the movable plate 33 and the fixed plate 32, and the space inside the cabinet body 1 is isolated from the external environment; as Figure 6 shown, the movable plate 33 has a separation position separated from the fixed plate 32. At this time, the flow channel 34 is opened, and the space inside the cabinet body 1 is connected with the external environment; both the fixed plate 32 and the movable plate 33 in this solution are heat-conducting structural parts, such as copper, aluminum-based composite materials, etc.; thus, in strong wind weather outdoors, the movable plate 33 is in the contact position and the flow channel 34 is closed, and the heat dissipation tube 422 is driven to move from the first position to the second position. The heat dissipation tube 422 can contact the side of the fixed plate 32 facing the space inside the cabinet body 1, or can contact the side of the movable plate 33 facing the space inside the cabinet body 1, or can contact both the side of the fixed plate 32 and the side of the movable plate 33 facing the space inside the cabinet body 1. When the coolant flows in the heat dissipation tube 422, the heat carried by the coolant is transferred to the high-speed flowing air in the external environment through the heat conduction between the heat dissipation tube 422, the fixed plate 32, and the movable plate 33, thereby realizing the dissipation of heat to the outside.

[0040] In this embodiment, setting the ventilation window 3 on the cabinet door 13 can avoid opening holes on the side walls at other positions inside the cabinet body 1 (saving the occupation of the side walls of the cabinet body 1 due to the installation of the ventilation window 3), and setting the fixed plate 32 and the movable plate 33 on the cabinet door 13 that can be opened and closed relative to the cabinet body 1 also helps the staff to regularly maintain and clean the movable plate 33 and the fixed plate 32. The staff only needs to open the cabinet door 13 to clean it, which is convenient to operate.

[0041] In this embodiment, the control enables the movable plate 33 to rotate between two adjacent fixed plates 32, so that the movable plate 33 rotates between the contact position and the separation position; exemplarily, in this embodiment, the second driving member 6 is used to drive the movable plate 33 to rotate between the contact position and the separation position; as Figure 4 shown, the second driving member 6 includes: a second gear 62 sleeved on the rotating shaft of the movable plate 33 is rotatably installed on a side wall of the frame 31 along the Y direction, a second electric push rod 63 is fixedly installed on the inner top of the cabinet door 13, and the telescopic end of the second electric push rod 63 is fixedly connected with a second rack 61. Tooth systems meshing with the second gear 62 are provided at positions corresponding to each second gear 62 on the second rack 61. By controlling the second electric push rod 63 to telescopically move a preset distance along the Z direction, the second rack 61 is used to drive a plurality of second gears 62 to rotate synchronously, and then a plurality of movable plates 33 are driven to act between the contact position and the separation position, so as to control the opening or closing of the flow channel 34, so that the space in the cabinet body 1 is isolated from or communicated with the external environment.

[0042] Referring to Figure 6 , Figure 7 shown, in an embodiment of the present application, the fixed plate 32 includes a first fixed plate 321 and a second fixed plate 322; wherein, there are two second fixed plates 322, and the two second fixed plates 322 are correspondingly connected to both ends of the first fixed plate 321, and the second fixed plates 322 extend in opposite directions away from the first fixed plate 321, so that the overall shape of the fixed plate 32 is Z-shaped; exemplarily, the first fixed plate 321 and the second fixed plate 322 can be integrally provided, or can be separately provided and connected by welding; the movable plate 33 includes a first movable plate 331 and a second movable plate 332, wherein there are two second movable plates 332, and the two second movable plates 332 are correspondingly connected to both ends of the first movable plate 331, and the second movable plates 332 extend in opposite directions away from the first movable plate 331, so that the overall shape of the movable plate 33 is Z-shaped; exemplarily, the first movable plate 331 and the second movable plate 332 can be integrally provided, or can be separately provided and connected by welding.

[0043] In this embodiment, as Figure 6 shown, when the movable plate 33 is in the separation position, the second fixed plate 322 and the second movable plate 332 on the adjacent fixed plate 32 and movable plate 33 are arranged in parallel; when the movable plate 33 is in the contact position, as Figure 7 shown, the second movable plate 332 and the second fixed plate 322 on the adjacent fixed plate 32 and movable plate 33 are in contact, so as to close the flow channel 34; as Figure 7As shown, when the movable plate 33 is in the contact position, the end of the second movable plate 332 away from the first movable plate 331 can abut against the connection between the second fixed plate 322 and the first fixed plate 321 adjacent to it, and the end of the second movable plate 332 away from the first movable plate 331 can also abut against other positions on the second fixed plate 322 adjacent to it, such as: the second fixed plate 322 is away from the contact point position of the first fixed plate 321 connected to it, as long as the flow channel 34 can be closed.

[0044] In this embodiment, the fixed plate 32 and the movable plate 33 are both arranged in a Z shape, so that the flow channel 34 between the adjacent fixed plate 32 and the movable plate 33 is also in a Z shape. The flow channel 34 arranged in the Z direction has the following beneficial effects: Dust-proof effect: The flow channel 34 is arranged in a Z shape, so that it has a relatively tortuous path, making it difficult for dust and particulate matter in the air to directly enter the interior of the cabinet 1; the dust will be blocked multiple times when entering the heat dissipation holes, and most of the dust will be deposited on the wall surface of the heat dissipation holes during the entry process, rather than directly entering the interior of the cabinet 1.

[0045] Insect-proof effect: the flow channel 34 is arranged in a Z shape, so that it has a relatively tortuous path, making it difficult for insects to directly enter the cabinet 1. When the insects enter the flow channel 34, they will encounter multiple obstacles and it is difficult to find a path to enter the cabinet 1.

[0046] Waterproof effect: the flow channel 34 is arranged in a Z shape, so that it has a relatively tortuous path, which can effectively prevent moisture from entering the interior of the cabinet 1. Rainwater or splashing water will be blocked multiple times when entering the flow channel 34, and it is difficult to directly enter the interior of the cabinet 1.

[0047] Reference Figure 8 , Figure 11 , Figure 12 As shown, in one embodiment of the present application, the cross section of the heat dissipation pipe 422 is rectangular, and the heat dissipation pipe 422 is rotatably mounted on the frame 421, and the rotation axis of the heat dissipation pipe 422 extends along the Y direction; for example, Figure 13As shown, hollow shafts 4221 are respectively provided at both ends of the heat dissipation tube 422 along the Y direction, and the heat dissipation tube 422 is rotatably installed on the frame body 421 through the hollow shafts 4221. The hollow shafts 4221 are internally communicated with the heat dissipation tube 422; first communication pipes 423 are respectively provided on both sides of the frame body 421 along the Y direction. The first communication pipes 423 are used to communicate the heads and tails of two adjacent heat dissipation tubes 422 in the Z direction. Exemplarily, the first communication pipe 423 is rotatably connected to the corresponding hollow shaft 4221 through a rotary joint 4231 to achieve rotary communication between the first communication pipe 423 and the hollow shaft 4221. In order to ensure that the first communication pipe 423 has high stability, auxiliary ribs can be used to fix the first communication pipe 423 on the frame body 421, thereby realizing the communication between two adjacent heat dissipation tubes 422 while satisfying the adjustable angle of the heat dissipation tube 422 relative to the frame body 421.

[0048] Exemplarily, such as Figure 9 、 Figure 10 As shown, one end of the first movable part 442 away from the first fixed part 441 is communicated with the drain port through the second communication pipe 424, and one end of the second movable part 452 away from the second fixed part 451 is communicated with the liquid inlet through the second communication pipe 424; in the Z direction, one of the hollow shafts 4221 on the uppermost heat dissipation tube 422 constitutes the liquid inlet, and one of the hollow shafts 4221 on the lowermost heat dissipation tube 422 constitutes the drain port. Rotary joints are also provided at the connection part between the hollow shaft 4221 and the second communication pipe 424 for realizing rotary communication between the hollow shaft 4221 and the second communication pipe 424.

[0049] In this embodiment, a first driving member 5 for driving the heat dissipation tube 422 to rotate relative to the frame body 421 is provided; such as Figure 9 、 Figure 13 As shown, the first driving member 5 includes a first gear 52 that rotates coaxially with the hollow shaft 4221, that is, the first gear 52 is coaxially sleeved and fixed on the hollow shaft 4221. A first rack 51 is movably connected along the Z direction on the frame body 421. Tooth systems meshing with the first gear 52 are provided at the corresponding positions of the first rack 51 and each first gear 52. A first electric push rod 53 is fixed at a suitable position on the frame body 421, and the telescopic end of the first electric push rod 53 is connected to the first rack 51 and is used to drive the first rack 51 to move a preset distance along the Z direction on the frame body 421, so as to adjust the angle of the heat dissipation tube 422 relative to the frame body 421 through the first rack 51 and the first gear 52; such as Figure 8As shown, when the air-cooled heat dissipation mode is adopted, several heat dissipation tubes 422 are all horizontally arranged at this time. The forced convection generated by the operation of the air-cooled module 2 can pass through the upper and lower surfaces of the heat dissipation tubes 422 respectively, so as to increase the contact surface between the cold air flow and the heat dissipation tubes 422 as much as possible, so as to realize high-efficiency heat dissipation of the coolant flowing through the heat dissipation tubes 422. Exemplarily, the heat dissipation tubes 422 are integrally arranged in a cuboid shape. Based on this setting form, the two relatively narrow side surfaces of the heat dissipation tubes 422 are arranged in sequence along the air flow moving direction, and the two relatively wide side surfaces of the heat dissipation tubes 422 are arranged in sequence along the direction perpendicular to the cold air flow moving direction. Therefore, when the cold air flow flows through the heat dissipation tubes 422, the cold air flow can contact the two relatively wide side surfaces of the heat dissipation tubes 422, so as to have a larger contact surface with the heat dissipation tubes 422 and realize high-efficiency heat dissipation.

[0050] In this embodiment, when heat dissipation is carried out by means of heat conduction, such as Figure 11 , Figure 12 As shown, first, the first driving member 5 is used to adjust the angle of the heat dissipation tubes 422 relative to the frame body 421, that is, the first rack 51 is driven by the first electric push rod 53 to move a preset distance along the Z direction, and the inclination angle of the heat dissipation tubes 422 is made to be the same as the inclination direction of the second fixed plate 322 on the side facing the inner space of the cabinet body 1 on the fixing plate 32. With this setting, when several heat dissipation tubes 422 move from the first position to the second position, each inclined heat dissipation tube 422 can be better in close contact with the second fixed plate 322 on the side close to the inner space of the cabinet body 1 (as Figure 12 described), so that the contact area between the heat dissipation tubes 422 and the second fixed plate 322 can be increased, thereby realizing higher heat transfer efficiency (the heat transfer efficiency is proportional to the contact area between the two), and being used for higher-efficiency heat dissipation of the coolant flowing through the heat dissipation tubes 422.

[0051] Exemplarily, in order to enable the heat dissipation tubes 422 to have a larger contact surface with the second fixed plate 322 to realize higher-efficiency heat conduction, in this embodiment, as Figure 12 shown, the hollow shaft 4221 connected to the heat dissipation tubes 422 can be arranged on the side of the heat dissipation tubes 422 close to the cooling box 41, that is, the hollow shaft 4221 is not arranged in the middle position of the heat dissipation tubes 422. With this setting, when the heat dissipation tubes 422 rotate a preset angle, most areas of the heat dissipation tubes 422 facing the second fixed plate 322 can be in contact with the second fixed plate 322, so as to avoid hindering the contact between the heat dissipation tubes 422 and the second fixed plate 322 due to the existence of the first gear 52; or the length of the second fixed plate 322 on the side facing the inner space of the cabinet body 1 can be set longer (as Figure 12As shown in the figure, the second fixed plate 322 in contact with the heat dissipation pipe 422 is moved across the first fixed plate 321, so that the second fixed plate 322 and the first fixed plate 321 are arranged in a T shape. When the heat dissipation pipe 422 is in the second position, the entire side of the heat dissipation pipe 422 facing the second fixed plate 322 is in contact with the second fixed plate 322 (further improving the heat transfer efficiency). However, with this arrangement, when the flow channel 34 is in the open state, the overly long second fixed plate 322 will prevent air from entering or discharging from the flow channel 34. Therefore, the length of the second fixed plate 322 near the inner space of the cabinet 1 should not be set too long, and a suitable length can be selected.

[0052] Referring to Figure 14 As shown in the figure, in an embodiment of the present application, the fixed plate 32 has a negative pressure cavity 323 arranged along its contour. In this embodiment, the first fixed plate 321 and the two second fixed plates 322 can be prepared by integral casting to ensure the sealing performance of the negative pressure cavity 323. The air pressure in the negative pressure cavity 323 is lower than the normal atmospheric pressure by a certain value, and in general, it only needs to maintain a certain negative pressure state. A capillary core 7 is attached to the inner wall of the negative pressure cavity 323. Exemplarily, the capillary core 7 can be made of porous materials such as sintered metal powder, metal mesh or fiber materials. The capillary core 7 is used to absorb and store a certain amount of coolant, and through capillary action, the liquid coolant is returned from the lower temperature end to the higher temperature end. In this embodiment, the capillary core 7 needs to have a high porosity and small pore diameter because the capillary force of the capillary core 7 depends on the porosity, pore diameter and material properties of the capillary core 7. Higher porosity and smaller pore diameter have stronger capillary force, which can more effectively make the condensed liquid coolant return to the higher temperature end position. Exemplarily, the coolant can be water, ethanol, acetone, or freon, organic silicone oil, etc. The above coolants are all used to absorb heat and evaporate at high temperatures, and then condense into liquids at low temperatures, and under the action of the capillary core 7, they return from the low temperature to the high temperature, thus realizing circulation.

[0053] In this embodiment, when the heat dissipation tube 422 is in the second position and contacts the second fixed plate 322 close to the inner space of the cabinet 1, at this time, the second fixed plate 322 close to the inner side of the cabinet 1 contacts the heat dissipation tube 422 with a higher temperature, which belongs to the hot end; the second fixed plate 322 on the side far from the inner side of the cabinet 1 is exposed to the outdoor environment and is always blown by the high-speed moving air flow in strong wind weather, which belongs to the cold end; when there is strong wind weather outdoors, heat conduction and dissipation are carried out on the environment inside the cabinet 1, that is, the heat dissipation tube 422 is moved from the first position to the second position, and the heat dissipation tube 422 is made to contact the second fixed plate 322 on the side facing the fixed plate 32 and close to the inner side of the cabinet 1, so that the heat carried by the coolant in the heat dissipation tube 422 is transferred to the above-mentioned hot end, and the coolant in the capillary core 7 at the hot end position is heated and evaporated (so that the air pressure near the hot end increases). At this time, the air pressure in the cold end area is relatively small, and thus a pressure difference is generated between the hot end and the cold end, so that the generated gas moves along the channel towards the cold end under the action of the pressure difference (resulting in a decrease in the amount of coolant absorbed and stored in the capillary core 7 at the hot end position). Along with the movement of the gas, when it encounters the cavity wall with a lower temperature at the cold end, the temperature decreases, causing the gas to start condensing and turning into a liquid (resulting in an increase in the amount of coolant absorbed and stored in the capillary core 7 at the cold end position). A large amount of heat is released during the condensation process, and this part of the heat is transferred away with the strong wind outdoors; and the coolant that has condensed into a liquid flows back to the hot end again under the capillary action of the capillary core 7 (the amount of coolant absorbed and stored by the capillary core 7 in the hot end and cold end areas is different. In order to maintain balance, the coolant in the capillary core 7 at the cold end will flow back to the capillary core 7 at the hot end under the capillary force of the capillary core 7), and the coolant that has flowed back to the hot end is used to absorb the heat transferred from the coolant in the heat dissipation tube 422 again. By repeating the above process, high-efficiency heat dissipation of the coolant flowing through the heat dissipation tube 422 can be achieved.

[0054] In this embodiment, when encountering strong winds outdoors, heat conduction is adopted to dissipate the heat of the environment inside the cabinet 1. That is, the heat dissipation pipe 422 is made to contact the first fixed plate 321 on the side close to the inside of the cabinet 1 on the fixed plate 32, and with the cooperation of the capillary core 7 and the coolant provided in the fixed plate 32, high-efficiency heat dissipation of the coolant flowing through the heat dissipation pipe 422 is achieved; in this embodiment, the coolant in the negative pressure chamber 323 provided in the fixed plate 32 can efficiently transfer heat through the phase change process of the liquid, and the heat transfer efficiency is much higher than that of traditional heat conduction elements, which can reach hundreds or even thousands of times that of traditional metal heat conduction materials; thus, when encountering strong winds outdoors, by using the phase change process of the coolant in the negative pressure chamber 323 of the fixed plate 32, high-efficiency heat dissipation of the coolant flowing through the heat dissipation pipe 422 is achieved. While preventing the air with a high dust concentration in the outdoor air from entering the cabinet 1, the strong winds outdoors are also utilized to cool and dissipate the heat of the above-mentioned cold end (i.e., the second fixed plate 322 on the side exposed to the outdoors on the fixed plate 32) (transfer the heat carried by the coolant to the external environment), so that high-efficiency heat dissipation can be achieved even when the environment inside the cabinet 1 is isolated from the external environment.

[0055] Exemplarily, when the environment inside the cabinet 1 is isolated from the external environment, the fixed plate 32 in contact with the heat dissipation pipe 422 is responsible for high-efficiency heat dissipation of the coolant flowing through the heat dissipation pipe 422, while the fixed plate 32 and the movable plate 33 not in contact with the heat dissipation pipe 422 transfer heat directly with the warmer air inside the cabinet 1 and exchange heat with the rapidly flowing air outside through the fixed plate 32 and the movable plate 33, thereby achieving the heat conduction and heat dissipation effect; in this embodiment, while achieving heat conduction and heat dissipation of the coolant flowing through the heat dissipation pipe 422 through the fixed plate 32 and the movable plate 33, heat conduction and heat dissipation of the high-temperature air in the space inside the cabinet 1 are also synchronously achieved, significantly improving the heat dissipation efficiency.

[0056] Refer to Figure 12 As shown, in an embodiment of the present application, when the movable plate 33 is in the contact position, at least a part of the second fixed plate 322 close to the space of the cabinet 1 is encapsulated in the space of the cabinet 1, and at least a part of the second fixed plate 322 far from the space of the cabinet 1 is not in contact with the space inside the cabinet 1; preferably, in order to improve the heat dissipation efficiency of the coolant flowing through the heat dissipation pipe 422, the second fixed plate 322 close to the space of the cabinet 1 is completely encapsulated in the space inside the cabinet 1, so that the second fixed plate 322 far from the space of the cabinet 1 is completely exposed to the outdoor environment; that is, when the movable plate 33 is in the contact position, the end of the second movable plate 332 at the adjacent position abuts against the connection between the second fixed plate 322 and the first fixed plate 321 (such as Figure 12As shown), at this time, the second fixed plate 322 on the side close to the cabinet 1 space is completely encapsulated in the cabinet 1 space, and the second fixed plate 322 on the side away from the cabinet 1 space is completely exposed to the outdoor environment; thereby, the contact area between the hot end area and the high-temperature space in the cabinet 1 and the contact area between the cold end and the strong wind flowing through the outdoor are increased as much as possible, so that the heat carried by the coolant flowing through the heat dissipation pipe 422 can be absorbed as quickly as possible at the hot end, and the steam in the negative pressure chamber 323 can be condensed as quickly as possible at the cold end to achieve efficient heat transfer.

[0057] Reference Figure 2 , Figure 3 As shown, in one embodiment of the present application, the DC charging pile also includes a partition 14 arranged between the charging module and the air cooling module 2, the partition 14 is fixedly installed in the cabinet 1 and divides the space in the cabinet 1 into a placement chamber 11 and a heat exchange chamber 12, and in the X direction, the partition 14 is penetrated by a through hole (not shown in the figure) for connecting the placement chamber 11 and the heat exchange chamber 12, and the air cooling module 2 is correspondingly arranged at the position of the through hole; exemplarily, the cross-section of the through hole should be larger than the cross-section of the cooling box 41, so that under the action of the air cooling module 2, the external low-temperature gas is drawn into the cabinet 1 from the ventilation window 3 on one side of the cabinet 1 and can flow between the placement chamber 11 and the heat exchange chamber 12 through the through hole provided on the partition 14; in this scheme, the ventilation window 3 close to the side of the placement chamber 11 is set as the air inlet side, and the ventilation window 3 close to the side of the heat exchange chamber 12 is set as the air outlet side.

[0058] Exemplarily, the first driving member 5, the second driving member 6, and the electric push rod, the air cooling module 2, the pump body 43 and other electrical components used to drive the frame 421 to move between the first position and the second position in this scheme are all communicatively connected to the central controller; at the same time, in order to be able to sense the outdoor wind force and the temperature of the environment inside the cabinet, a wind speed sensor can be installed at a suitable position on the top of the cabinet 1, and a temperature sensor can be arranged at a suitable position inside the cabinet, and the wind speed sensor and the temperature sensor are also communicatively connected to the central controller. The central controller obtains the wind speed around the cabinet 1 in real time through the wind speed sensor, and obtains the temperature change of the environment inside the cabinet in real time through the temperature sensor, and then The above-mentioned electrical components are controlled to work in coordination, so as to realize air cooling of the charging module in the cabinet 1 when the ambient temperature in the cabinet 1 exceeds the preset safety range in light wind weather, and heat conduction cooling of the charging module in the cabinet 1 when the ambient temperature in the cabinet 1 exceeds the preset safety range in strong wind weather; thereby ensuring sufficient heat dissipation of the environment in the cabinet 1 and preventing a large amount of dust in the outdoor air from entering the cabinet 1 in strong wind weather, which would reduce the heat dissipation efficiency over time and easily lead to safety accidents; when the ambient temperature in the cabinet 1 is lower than the preset safety range, the central controller controls the air cooling module 2 and the pump body 43 to stop working, indicating that the charging pile is in standby mode at this time.

[0059] In summary, in this solution, a fixed plate 32 and a movable plate 33 that cooperate with each other, as well as a movable heat dissipation member 4, are provided on the ventilation window 3 of the cabinet body 1; thereby, when the dust concentration in the outdoor air is relatively low (gentle wind weather), the flow channel 34 between the fixed plate 32 and the movable plate 33 is in an open state, for air-cooling the environment inside the cabinet body 1; when the dust concentration in the outdoor air is relatively high (strong wind weather), the flow channel 34 between the fixed plate 32 and the movable plate 33 is in a closed state, and the heat dissipation member 4 is moved to a position in contact with the fixed plate 32, thereby realizing heat conduction heat dissipation for the environment inside the cabinet body 1; preferably avoiding the situation that when cooling the environment inside the cabinet body 1 in strong wind weather, a large amount of dust easily enters the cabinet body 1, resulting in a decrease in heat dissipation efficiency and use stability; at the same time, the flow channel 34 between adjacent fixed plates 32 and movable plates 33 is arranged in a Z shape when in an open state, realizing air-cooling the environment inside the cabinet body 1 while preventing dust, sundries, etc. in the external environment from entering the cabinet body 1; in addition, by providing a negative pressure cavity 323, a capillary core 7, a coolant, etc. in the fixed plate 32, the cooling and heat dissipation efficiency during heat conduction heat dissipation for the environment inside the cabinet body 1 is further improved, while preventing dust intrusion from the external environment in strong wind weather and ensuring high-efficiency cooling.

[0060] The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the technical principle of the present invention, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A DC charging pile, having X, Y, and Z directions that intersect pairwise, is characterized in that, Comprising: A cabinet body (1) having a communicating placement cavity (11) and a heat exchange cavity (12). In the X direction, the placement cavity (11) and the heat exchange cavity (12) are arranged in sequence. The placement cavity (11) is used for placing a charging module; An air-cooling module (2) provided in the heat exchange cavity (12); Ventilation windows (3), with at least two provided. At least two of the ventilation windows (3) are respectively provided on two side walls of the cabinet body (1) along the X direction. The ventilation window (3) has a closed position and an open position. When the ventilation window (3) is in the closed position, it is used to seal the cabinet body (1). When the ventilation window (3) is in the open position, it is used to communicate the cabinet body (1) with the outside; And A heat dissipation member (4), at least partially movably provided in the heat exchange cavity (12), and the heat dissipation member (4) is in contact connection with the charging module. The heat dissipation member (4) is provided on a side of the air-cooling module (2) away from the charging module. The heat dissipation member (4) has a first position close to the charging module and a second position in contact with one of the ventilation windows (3). When the ventilation window (3) is in the open position, the heat dissipation member (4) is in the first position, for air-cooling the charging module. When the ventilation window (3) is in the closed position, the heat dissipation member (4) is in the second position, for heat conduction cooling of the charging module.

2. The DC charging pile according to claim 1, characterized in that, The heat dissipation member (4) includes: A cooling box (41) provided in the placement cavity (11). The cooling box (41) is used for containing the charging module and a coolant, so that the charging module is immersed in the coolant; and A heat dissipation row (42) provided in the heat exchange cavity (12) on a side of the air-cooling module (2) away from the cooling box (41). In the X direction, the heat dissipation row (42) is movably provided in the heat exchange cavity (12). The heat dissipation row (42) has a liquid inlet and a liquid outlet communicating with the cooling box (41); A pump body (43) provided on the cooling box (41). The pump body (43) enables the coolant to circulate between the cooling box (41) and the heat dissipation row (42) through the liquid inlet and the liquid outlet.

3. The DC charging pile according to claim 2, wherein The heat dissipation row (42) includes: A frame body (421) movably provided in the heat exchange cavity (12); and Heat dissipation tubes (422) extending along the Y direction, and the heat dissipation tubes (422) are installed on the frame body (421). There are a plurality of the heat dissipation tubes (422), and the plurality of heat dissipation tubes (422) are spaced along the Z direction. Adjacent two of the heat dissipation tubes (422) are connected end to end. One of the two heat dissipation tubes (422) at both ends in the Z direction is provided with the liquid inlet, and the other is provided with the liquid outlet.

4. The DC charging pile according to claim 3, wherein, The heat dissipation member (4) further includes: The first telescopic tube (44) extends along the X direction. The first telescopic tube (44) has a first fixed part (441) and a first movable part (442) that are connected and communicate with each other. The first movable part (442) can move along the X direction. The first fixed part (441) is used to communicate with the cooling box (41), and the first movable part (442) is used to communicate with one of the liquid inlet and the liquid outlet; and The second telescopic tube (45) extends along the X direction. The second telescopic tube (45) has a second fixed end and a second movable part (452) that are connected and communicate with each other. The second movable part (452) can move along the X direction. The second fixed end is used to communicate with the cooling box (41), and the second movable part (452) is used to communicate with the other of the liquid inlet and the liquid outlet; The pump body (43) is arranged on the first telescopic tube (44) and / or the second telescopic tube (45).

5. The DC charging pile according to claim 3 or 4, characterized in that The DC charging pile further includes cabinet doors (13) that are openable and closable on both sides of the cabinet body (1) along the X direction. The ventilation window (3) is correspondingly arranged on the cabinet doors (13). The ventilation window (3) includes: A frame (31) is installed on the cabinet door (13). In the X direction, an installation hole (311) is penetrated through the frame (31); and A fixing plate (32) extends along the Y direction, and the fixing plate (32) is arranged in the installation hole (311). There are multiple fixing plates (32), and the multiple fixing plates (32) are arranged at intervals along the Z direction; A movable plate (33) is rotatably installed between two adjacent fixing plates (32) to form a flow channel (34) that communicates the cabinet body (1) and the outside world between the adjacent fixing plates (32) and the movable plate (33). The movable plate (33) has a contact position in contact with the fixing plate (32) and a separation position separated from the fixing plate (32). When the movable plate (33) is in the contact position, the flow channel (34) is closed, and the ventilation window (3) is in the closed position. When the movable plate (33) is in the separation position, the flow channel (34) is opened, and the ventilation window (3) is in the open position; Both the movable plate (33) and the fixing plate (32) are heat-conducting structural members.

6. The DC charging pile according to claim 5, wherein, The fixing plate (32) includes: A first fixed plate (321); and A second fixed plate (322), there are two second fixed plates (322), and the two second fixed plates (322) are correspondingly connected to both ends of the first fixed plate (321). The two second fixed plates (322) extend away from the first fixed plate (321) in opposite directions; The movable plate (33) includes: A first movable plate (331), the first movable plate (331) is rotatably installed in the installation hole (311), and the rotation axis of the first movable plate (331) extends along the Y direction; and The second movable plates (332) have two parts, and the two second movable plates (332) are connected to two ends of the first movable plate (331) respectively, and the two second movable plates (332) extend in opposite directions away from the first movable plate (331); The movable plate (33) and the fixed plate (32) are both arranged in a Z shape, so that when the movable plate (33) is in the disengaged position, the flow channel (34) is in a Z shape.

7. The DC charging pile according to claim 6, wherein The cross section of the heat dissipation pipe (422) is rectangular, and the heat dissipation pipe (422) is rotatably mounted on the frame (421), and the rotation axis of the heat dissipation pipe (422) extends along the Y direction; When the heat sink (4) is in the first position, each of the heat dissipation tubes (422) is arranged horizontally; when the heat sink (4) is in the second position, the heat dissipation tubes (422) are rotated at a preset angle so that at least a portion of the heat dissipation tubes (422) facing the cabinet door (13) is in corresponding contact with the second fixed plate (322) on one side of the cabinet body (1) space.

8. The DC charging pile according to claim 6, characterized in that, The fixing plate (32) has a negative pressure cavity (323) arranged along its contour, and a capillary core (7) is attached to the inner wall of the negative pressure cavity (323); A channel is formed on the side of the capillary core (7) facing away from the wall of the negative pressure chamber (323), and a coolant is stored in the capillary core (7), and the coolant can be converted between a liquid state and a gaseous state within a preset temperature range.

9. The DC charging pile according to claim 8, wherein, When the movable plate (33) is in the contact position, the second fixed plate (322) on the side close to the cabinet (1) space is at least partially enclosed in the cabinet (1) space, and the second fixed plate (322) on the side away from the cabinet (1) space is at least partially not in contact with the cabinet (1) space.

10. The DC charging pile according to claim 1, characterized in that, The DC charging pile further comprises a partition (14) arranged between the charging module and the air cooling module (2), wherein the partition (14) divides the space inside the cabinet (1) into the placement cavity (11) and the heat exchange cavity (12); In the X direction, the partition (14) is provided with a through hole for connecting the placement cavity (11) and the heat exchange cavity (12), and the air cooling module (2) is arranged at a position corresponding to the through hole.

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