A direct current charging pile

Abstract

The application 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 are arranged on the ventilation windows on the two sides of the cabinet body in a matched mode; when the dust concentration of outdoor air is low, the flow channel between the fixed plate and the movable plate is opened to cool the environment in the cabinet body by air cooling; 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 is moved to the position of contacting the fixed plate, so that the heat conduction cooling of the environment in the cabinet body is realized; the scheme avoids the situation that a large amount of dust enters the cabinet body to reduce the heat dissipation efficiency and use stability when the environment in the cabinet body is cooled in windy weather; in addition, the negative pressure cavity, the capillary core and the coolant are arranged in the fixed plate, so that the cooling efficiency during the heat conduction cooling is further improved, dust in the external environment in windy 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 DC charging pile. Background Art

[0002] A DC charging pile is a charging device that provides DC power to 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, providing 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 under high load. Whether the DC charging pile can work efficiently, stably and continuously is particularly important for the heat dissipation of the charging module. Currently, air cooling is mostly used to cool and dissipate heat from the internal components of the charging pile. In windy weather, outdoor dust is blown up, resulting in a significant increase in the 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, resulting in reduced heat dissipation efficiency; on the other hand, it will reduce the insulation performance of electronic components, increase the risk of short circuit, and 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 with the airflow during windy weather while ensuring the cooling effect has become a technical problem that needs to be solved urgently 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] To achieve the above objectives, an embodiment of the present application provides a DC charging pile having two intersecting X-directions, Y-directions, and Z-directions, including:

[0007] 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;

[0008] An air cooling module is provided in the heat exchange cavity;

[0009] There are at least two ventilation windows, and the at least two ventilation windows are respectively provided on the two side walls of the cabinet along the X direction; the ventilation windows have a closed position and an open position; when the ventilation windows are in the closed position, they are used to seal the cabinet; when the ventilation windows are in the open position, they are used to connect the cabinet with the outside world; and

[0010] A heat sink is at least partially movable and disposed in the heat exchange cavity, and the heat sink is in contact with the charging module. 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.

[0011] In one embodiment, the heat dissipation element includes:

[0012] 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

[0013] A heat sink is provided in the heat exchange cavity on the side of the air cooling module away from the cooling box, and is movable in the heat exchange cavity in the X direction; the heat sink has a liquid inlet and a liquid outlet communicated with the cooling box;

[0014] The pump body is arranged on the cooling box, and the pump body allows the coolant to circulate between the cooling box and the radiator through the liquid inlet and the liquid outlet.

[0015] In one embodiment, the heat sink comprises:

[0016] a frame movably disposed in the heat exchange cavity; and

[0017] 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; the end to end of each adjacent heat dissipation pipe is connected; one of the two heat dissipation pipes at both ends of the Z direction is provided with the liquid inlet, and the other is provided with the liquid outlet.

[0018] In one embodiment, the heat dissipation element further includes:

[0019] a first telescopic tube extending along the X-direction, the first telescopic tube having a first fixed portion and a first movable portion communicating with each other, the first movable portion being movable along the X-direction; the first fixed portion being configured to communicate with the cooling box, and the first movable portion being configured to communicate with one of the liquid inlet and the liquid outlet; and

[0020] a second telescopic tube extending along the X-direction, the second telescopic tube having a second fixed end and a second movable portion communicating with each other, the second movable portion being movable along the X-direction; the second fixed end being configured to communicate with the cooling box, and the second movable portion being configured to communicate with the other of the liquid inlet and the liquid outlet;

[0021] The pump body is arranged on the first telescopic tube and / or the second telescopic tube.

[0022] In one embodiment, the DC charging pile further includes cabinet doors that can be opened and closed and are arranged on both sides of the cabinet along the X direction, and the ventilation windows are correspondingly arranged on the cabinet doors, and the ventilation windows include:

[0023] A frame is mounted on the cabinet door, and a mounting hole is provided through the frame in the X direction; and

[0024] a fixing plate extending along the Y direction and disposed in the mounting hole, wherein the fixing plate is provided in plurality and the plurality of fixing plates are spaced apart along the Z direction;

[0025] A movable plate is rotatably installed between two adjacent fixed plates to form a flow channel between the adjacent fixed plates and the movable plate, which is connected to the cabinet and the outside world; the movable plate has a contact position with the fixed plates and a separation position separated from the fixed plates; when the movable plate is in the contact position, the flow channel is closed, so that the ventilation window is in the closed position; when the movable plate is in the separation position, the flow channel is opened, so that the ventilation window is in the open position;

[0026] The movable plate and the fixed plate are both heat-conducting structural parts.

[0027] In one embodiment, the fixing plate comprises:

[0028] First fixed board; and

[0029] There are two second fixed plates, the two second fixed plates are connected to the two ends of the first fixed plate respectively, and the two second fixed plates extend in opposite directions away from the first fixed plate;

[0030] The movable plate comprises:

[0031] a first movable plate, the first movable plate being rotatably mounted in the mounting hole, and a rotation axis of the first movable plate extending along the Y direction; and

[0032] There are two second movable plates, the two second movable plates are correspondingly connected to two ends of the first movable plate, and the two second movable plates extend in opposite directions away from the first movable plate;

[0033] The movable plate and the fixed plate are both arranged in a Z shape, so that when the movable plate is in the disengaged position, the flow channel is in a Z shape.

[0034] In one embodiment, the heat dissipation pipe has a rectangular cross section, and the heat dissipation pipe is rotatably mounted on the frame, with the rotation axis of the heat dissipation pipe extending along the Y direction;

[0035] 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 contact with the second fixed plate close to the cabinet space.

[0036] In one embodiment, the fixing plate has a negative pressure cavity arranged along its contour, and a capillary wick is attached to the inner wall of the negative pressure cavity;

[0037] A channel is formed on a side of the capillary core facing away from the negative pressure chamber wall. A coolant is stored in the capillary core. The coolant can be converted between liquid and gas within a preset temperature range.

[0038] In one embodiment, when the movable plate is in the contact position, the second fixed plate on the side close to the cabinet space is at least partially encapsulated in the cabinet space, and the second fixed plate on the side away from the cabinet space is at least partially not in contact with the cabinet space.

[0039] In one embodiment, the DC charging pile further includes a partition provided 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;

[0040] In the X direction, a through hole for connecting the placement cavity and the heat exchange cavity is formed on the partition, and the air cooling module is arranged at a position corresponding to the through hole.

[0041] Compared with the prior art, the DC charging pile of the embodiment of the present invention has the following beneficial effects: the present solution provides a matching fixed plate and movable plate, as well as a movably arranged heat sink on the cabinet ventilation window; thereby, when the dust concentration of the 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 cool the environment inside the cabinet; when the dust concentration of the 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 environment inside the cabinet; 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, debris, etc. from entering the cabinet in the external environment; in addition, by arranging a negative pressure cavity, capillary core, coolant, etc. in the fixed plate, the cooling and heat dissipation efficiency of the environment inside the cabinet during heat conduction and heat dissipation is further improved, while preventing the intrusion of dust from the external environment in windy weather, and ensuring high-efficiency cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the overall structure of a DC charging pile according to an embodiment of the present invention;

[0043] Figure 2 For the present invention Figure 1 Another perspective structural diagram;

[0044] Figure 3 For the present invention Figure 2 Schematic diagram of the structure in front view;

[0045] Figure 4 This is a schematic diagram of the connection relationship between the cabinet door and the ventilation window according to an embodiment of the present invention;

[0046] Figure 5 For the present invention Figure 4 Schematic diagram of the separation of central ventilation window and cabinet door;

[0047] Figure 6 This is a schematic diagram of a ventilation window in an open position according to an embodiment of the present invention;

[0048] Figure 7 This is a schematic diagram of a ventilation window in a closed position according to an embodiment of the present invention;

[0049] Figure 8 This is a schematic diagram of a heat sink in a first position according to an embodiment of the present invention;

[0050] Figure 9 For the present invention Figure 8Another perspective structural diagram;

[0051] Figure 10 This is a schematic diagram of a heat sink in a second position according to an embodiment of the present invention;

[0052] Figure 11 This is a schematic diagram of a heat sink in a second position in contact with a ventilation window according to an embodiment of the present invention;

[0053] Figure 12 For the present invention Figure 11 A schematic diagram of the structure enlargement in the middle;

[0054] Figure 13 This is a schematic diagram of the connection relationship of the heat dissipation pipes according to an embodiment of the present invention;

[0055] Figure 14 Schematic diagram of the internal structure of a fixing plate according to an embodiment of the present invention.

[0056] In the figure, 1, cabinet body; 11, placement cavity; 12, heat exchange cavity; 13, cabinet door; 131, ventilation hole; 14, partition; 15, charging gun;

[0057] 2. Air cooling module;

[0058] 3. Ventilation window; 31. Frame; 311. Mounting hole; 32. Fixed plate; 321. First fixed plate; 322. Second fixed plate; 323. Negative pressure chamber; 33. Movable plate; 331. First movable plate; 332. Second movable plate; 34. Flow channel;

[0059] 4. Heat sink; 41. Cooling box; 42. Radiator; 421. Frame; 422. Heat pipe; 4221. Hollow shaft; 423. First connecting pipe; 4231. Rotating joint; 424. Second connecting pipe; 43. Pump body; 44. First telescopic pipe; 441. First fixed portion; 442. First movable portion; 45. Second telescopic pipe; 451. Second fixed portion; 452. Second movable portion;

[0060] 5. First driving member; 51. First rack; 52. First gear; 53. First electric push rod;

[0061] 6. Second driving member; 61. Second rack; 62. Second gear; 63. Second electric push rod;

[0062] 7. Capillary wick. DETAILED DESCRIPTION

[0063] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0064] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as blocking the present invention. It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0065] 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, it generates a lot of heat. The power devices (such as IGBT) inside the charging module generate significant heat when running at high load. Whether the DC charging pile can operate efficiently, stably and continuously, the heat dissipation of the charging module is particularly important. Currently, DC charging piles mostly use air cooling to cool and dissipate heat from the internal components (charging module and related control modules) of the charging pile. When the charging pile is performing charging work in windy weather, the strong wind will blow up dust from the ground and mix it with the wind-blown air, resulting in a significant increase in dust concentration in the air. If the DC charging pile uses air cooling, the fan will draw air containing a large amount of dust into the charging pile, causing dust to accumulate on the surface of the charging module and other electronic components. The adhesion of dust increases thermal resistance and reduces heat dissipation efficiency. It also reduces the insulation performance of electronic components, increases the risk of short circuits, and is not conducive to the reliable and stable operation of the charging pile. Based on the above embodiments of the present application, a DC charging pile is provided to solve the above problems.

[0066] Reference Figures 1-14 As shown, the embodiment of the present application proposes a DC charging pile with two intersecting X-direction, Y-direction and Z-direction, including a cabinet 1, an air cooling module 2, a ventilation window 3, and a heat sink 4, wherein charging guns 15 are respectively provided on both sides of the cabinet 1; Figure 2 、 Figure 3As shown, the cabinet 1 has a placement cavity 11 and a heat exchange cavity 12 that are connected. The placement cavity 11 and the heat exchange cavity 12 are arranged in sequence in the X direction. The placement cavity 11 is used to place the charging module and to install other control module units that work in conjunction with the charging module; the air cooling module 2 is arranged in the heat exchange cavity 12, and the air cooling module 2 can be a fan, that is, the charging module and the related control module unit and the air cooling module 2 are respectively located on both sides of the cabinet 1; there are at least two ventilation windows 3. When there are two ventilation windows 3, the two ventilation windows 3 are respectively arranged on the side walls of the cabinet 1 at both ends along the X direction; when there are more than two ventilation windows 3, on the side walls of the cabinet 1 at both ends along the X direction At least one ventilation window 3 is provided, and the remaining ventilation windows 3 can be set at appropriate positions of the cabinet 1 along the Y-direction side wall (the specific setting position can be set accordingly according to the placement position of the internal components of 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 and the external environment are not connected, and the forced convection of the air-cooling module 2 allows the air flow with a lower external temperature to be sent into the cabinet 1 through the open ventilation window 3, which is used to realize air cooling and heat dissipation of the charging module and related control modules in the cabinet 1; when the ventilation window 3 is in the closed position, the environment inside the cabinet 1 is isolated from the external environment and is used to seal the cabinet 1.

[0067] In this embodiment, the heat sink 4 is at least partially movable and arranged in the heat exchange cavity 12, and the heat sink 4 is in contact with the charging module. The heat sink 4 is arranged in the heat exchange cavity 12 on the side of the air cooling module 2 away from the charging module. The heat sink 4 has a high heat conduction efficiency. The heat sink 4 is in contact with the charging module, so that the heat generated when the charging module is working can be quickly transferred to the heat sink 4, and the cold air flow in the external environment is passed through the heat sink 4 through the air cooling module 2 to achieve heat exchange with the heat sink 4, and finally discharged to the external environment with the movement of the air flow, thereby achieving high-efficiency heat dissipation of the charging module; illustratively, the relevant control module used to cooperate with the charging module can also be in contact with the heat sink 4 to achieve cooling and heat dissipation of the relevant control module; since the heat generated when the relevant control module is working is much lower than the heat generated when the charging module is working, the heat dissipation of the DC charging pile mainly revolves around the charging module.

[0068] In this embodiment, if Figure 8As shown, the heat sink 4 has a first position close to the charging module. At this time, the heat sink 4 is close to the charging module, so that the heat generated by the charging module during operation can be transferred to the heat sink 4 in a timely and rapid manner, significantly improving the heat conduction efficiency. The close contact can reduce the heat loss to other spatial areas in the cabinet 1 during the transfer process, ensuring that the heat can be quickly transferred from the charging module to the heat sink 4. Then, through the forced convection of the air cooling module 2, air flows through the heat sink 4, thereby accelerating the heat dissipation on the surface of the heat sink 4. The airflow provided by the air cooling module 2 quickly removes the heat on the heat sink 4, thereby significantly improving the heat dissipation efficiency of the charging module and ensuring that the charging module remains within a safe operating temperature range during high-power operation. Therefore, when the wind force in the external environment is relatively low, the dust and dirt in the external environment are basically in a deposited state, and the dust content in the air is relatively low. At this time, the charging pile is cooled by air; that is, the ventilation window 3 is in the open position, and the heat sink 4 is in the first position close to the side of the charging module. Then, the air cooling module 2 is started to realize forced convection between the air in the cabinet 1 and the external environment, thereby achieving efficient heat dissipation of the charging module.

[0069] In this embodiment, when the external environment is windy, dust and dirt deposited on the road surface and other attachments will be swept into the air, causing the dust content in the air to increase significantly. At this time, if the air cooling method is continued to be used to dissipate heat inside the charging pile, then under the forced convection of the air cooling module 2, a large amount of air containing dust will be sent into the charging pile, causing a large amount of dust to adhere to the charging module and the surface of the related control module. Due to the adhesion of dust and the low thermal conductivity of dust, when dust adheres to the surface of the charging module, it will form an insulating layer, which hinders the conduction of heat and significantly increases 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 be unable to dissipate in time, causing the temperature of the charging module to rise. If the temperature exceeds the safe range, it may cause the performance of the equipment to decline or even cause a malfunction; at the same time, a large amount of dust adheres to the surface of the charging module, especially in the electronic components, connectors, terminals and other parts. The dust may form a conductive path. If these paths are connected to different potential points, it may cause a short circuit. At this time, it is necessary to adjust the heat dissipation method of the charging pile; that is, adjust the ventilation window 3 from the open position to the closed position, so that the environment inside the cabinet 1 is isolated from the external environment, so that the charging module and related control modules in the cabinet 1 are in a relatively sealed environment; then control the heat sink 4 to move from the first position to the second position (by Figure 9 Move the position shown in Figure 10), that is, the heat sink 4 is moved toward the position of the ventilation window 3 corresponding thereto (that is, away from the charging module), and the heat sink 4 is brought into contact with the corresponding ventilation window 3 (that is, the ventilation window 3 is brought into contact with the heat sink 4 on one side wall of the space inside the cabinet 1), as shown in FIG. Figure 11 As shown, at this time, the heat generated by the charging module when it is working is quickly transferred and transferred to the ventilation window 3 under the action of the heat sink 4, while 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 is in contact with the heat sink 4 and has a higher temperature, and the other side wall of the ventilation window 3 is exposed to the external environment; thereby, the heat transferred to the ventilation window 3 and the high-speed airflow flowing through the outside of the ventilation window 3 generate heat transfer (heat exchange), and under the action of strong external wind, the heat transferred from the heat sink 4 to the ventilation window 3 is quickly transferred away and dissipated to the outside with the fast-moving airflow, and then through the cooperation of the heat sink 4 and the ventilation window 3, it is used to achieve heat dissipation of the charging module in the cabinet 1 when the environment inside the cabinet 1 is isolated from the external environment.

[0070] In this embodiment, when the outdoor wind is relatively small (the dust concentration in the outside air is relatively low), the ventilation window 3 is in the open position and the heat sink 4 is in a position close to the charging module (the heat generated when the charging module is working can be quickly transferred to the heat sink 4), and the heat dissipation method of air cooling is adopted to quickly dissipate the heat from the heat sink 4, thereby achieving efficient cooling of the charging module; when the outdoor wind is relatively large (the dust concentration in the outside air is relatively large), the ventilation window 3 is in the closed position (isolating the space inside the cabinet 1 from the external environment), and the heat sink 4 and the corresponding ventilation window 3 are in contact with one side wall of the space inside the cabinet 1, thereby cooling the charging module by heat conduction, thereby preventing a large amount of dust mixed in the air from entering the cabinet 1 during windy weather.

[0071] For example, regardless of whether the charging pile is performing charging work, when encountering strong winds, the ventilation window 3 can be closed to isolate the environment inside the cabinet 1 from the external environment, so that the charging module and other related control modules in the cabinet 1 are in a relatively sealed environment. Since the charging pile is not performing charging work 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 relatively small at this time), and heat conduction is sufficient to cool and dissipate the heat; at this time, the heat sink 4 and the ventilation window 3 may be in contact or not. Preferably, making the heat sink 4 contact 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 charging work.

[0072] Reference Figure 3 、 Figure 8 、 Figure 9As shown, in one embodiment of the present application, the heat dissipation element 4 includes a cooling box 41, a heat dissipation radiator 42 and a pump body 43; wherein the cooling box 41 is fixedly installed in the placement cavity 11, and is used to accommodate the charging module, that is, the charging module is placed in the cooling box 41, and the cooling box 41 is filled with coolant, and the coolant completely fills the space in the cooling box 41 so that the charging module is completely immersed in the coolant; illustratively, the coolant can be hydrocarbons (such as mineral oil, synthetic oil, etc.), silicones (such as silicone oil), etc.; the heat dissipation radiator 42 is arranged on the side of the air-cooled module 2 away from the cooling box 41. In the heat cavity 12, and in the X direction, the heat sink 42 is movable and connected to the heat exchange cavity 12, so that the heat sink 42 can move close to the charging module (so that the heat sink 4 is in the first position), and can also move toward the corresponding ventilation window 3 (so that the heat sink 4 is in the second position); the heat sink 42 is a structural component with a high thermal conductivity coefficient and the heat sink 42 is provided with a liquid inlet and a liquid outlet connected to the cooling box 41. The pump body 43 is provided on the cooling box 41, and the coolant in the cooling box 41 is transported to the heat sink 42 through the liquid inlet through the pump body 43, and then flows back to the cooling box 41 again through the liquid outlet.

[0073] 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. Therefore, when it performs charging work, the heat generated by it can be quickly transferred to the coolant (the charging module is in direct contact with the coolant, reducing thermal resistance, and 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 the 0.026 of air). W / (m·K)), which 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 box 41 is continuously sent to the heat sink 42 through the liquid inlet. The coolant carrying a large amount of heat is absorbed by the forced airflow generated when the air cooling module 2 is working when flowing through the heat sink 42, and is discharged outward from the cabinet 1 with the flow of the air flow. After completing the heat exchange with the air flow, the temperature of the coolant is reduced and it flows back to the cooling box 41 through the drain port again. The above process is repeated in a cycle, so that the coolant with a higher temperature flows through the heat sink 42 for cooling, and then the cooled coolant flows back to the cooling box 41 again, so that the coolant circulates between the cooling box 41 and the heat sink 42, thereby being used to achieve high-efficiency cooling and heat dissipation of the charging module immersed in the coolant.

[0074] In this embodiment, when the air cooling mode is used for heat dissipation, the reason why the heat sink 42 is placed in the first position close to the charging module is that: the farther the heat sink 42 is from the cooling box 41, the longer the pipe the coolant needs to circulate back. The increase in pipe length will lead to increased resistance (the coolant will be subject to friction resistance when flowing in the pipe. The longer the pipe, the greater the resistance; this will reduce the flow rate of the coolant, thereby slowing down the return flow rate), pressure loss (long pipes will cause greater pressure loss, and a greater pump pressure is required to maintain the same flow rate). In addition, during the flow in the longer pipe, the coolant may interact with the surrounding environment. Heat exchange occurs, causing the temperature to rise, which will reduce the heat dissipation efficiency of the coolant because the heat dissipation capacity will be weakened when its temperature is close to the ambient temperature. In addition, longer pipes will cause delays in heat transfer because the longer the pipes, the longer the coolant reflux time, resulting in the heat generated by the charging module not being taken away from the cooling box 41 in time, which may cause the temperature in the cooling box 41 to rise, affecting the heat dissipation efficiency. Based on the above, in this embodiment, when using air cooling to cool the coolant flowing through the heat sink 42, the heat sink 42 should be as close to the cooling box 41 as possible to improve the heat dissipation efficiency of the charging module.

[0075] Reference Figure 8 、 Figure 9 、 Figure 10 As shown, in one embodiment of the present application, the heat sink 42 includes a frame 421 and a heat pipe 422; wherein the frame 421 is connected to the heat exchange chamber 12 along the X direction. For example, an electric rod (the electric rod is not shown in the figure) is provided in the heat exchange chamber 12 for driving the frame 421 to move along the X direction, so that the fixed end of the electric rod is fixedly installed at a suitable position in the heat exchange chamber 12 (such as on the side wall of the heat exchange chamber 12), and then the telescopic end of the electric rod is fixedly connected to the frame 421. By controlling the telescopic movement of the electric rod, the frame 421 is driven to move in the heat exchange chamber 12, so as to drive the frame 421 to transfer between the first position and the second position; Figure 9 、 10As shown, the heat dissipation pipe 422 extends along the Y direction, and the two ends of the heat dissipation pipe 422 along the Y direction are respectively rotatably mounted on the frame 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, thereby forming a heat exchanger composed of multiple heat dissipation pipes 422 (the heat dissipation pipe 422 is made of a material with a high thermal conductivity coefficient, such as an aluminum-based composite material, copper, etc.), and the coolant circulates between the cooling box 41 and the above-mentioned heat exchanger; at the two ends at the Z direction, Among the heat dissipation tubes 422, that is, one of the heat dissipation tube 422 at the top and the heat dissipation tube 422 at the bottom is provided with a liquid inlet and the other is provided with a liquid outlet. The liquid inlet and the liquid outlet are respectively connected to the cooling box 41, so that under the action of the pump body 43, the coolant is driven to circulate between the cooling box 41 and the heat exchanger composed of multiple heat dissipation tubes 422, which is used to cool the coolant in the cooling box 41, so that the cooled coolant flows back to the cooling box 41, which can better absorb the heat generated when the charging module is working.

[0076] In this embodiment, the liquid inlet can be connected to the top position of the cooling box 41, and the liquid drain can be connected to the bottom position of the cooling box 41, that is, the liquid outlet position of the cooling box 41 is set at the top and the liquid inlet position is set at the bottom to utilize the natural convection of the coolant; because when the coolant absorbs heat, its temperature increases and its density decreases, thereby naturally rising; on the contrary, the density of the coolant is larger and will naturally decrease. This natural convection phenomenon can promote the circulation of the coolant in the cooling box 41. In this embodiment, the liquid inlet of the radiator 42 is connected to the bottom of the cooling box 41, and the liquid drain is connected to the top of the cooling box 41, so as to utilize the circulation of the coolant in the cooling box 41, so that a natural circulation path is formed in the cooling box 41, and it can ensure that the coolant flows fully and evenly in the cooling box 41, and evenly absorbs the heat generated by the charging module.

[0077] In this embodiment, when the coolant carrying heat flows through the heat exchanger composed of multiple heat dissipation tubes 422 under the action of the pump body 43, the forced convection generated when the air cooling module 2 is working causes heat exchange to occur between the air flow and the coolant flowing through the heat dissipation tubes 422, thereby achieving efficient cooling of the coolant.

[0078] Reference Figure 10As shown, in one embodiment of the present application, the heat sink 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; illustratively, 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 be inserted into 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 the coolant is cooled by the first fixed portion 441 and the first movable portion 442. No leakage occurs when the coolant flows between the second fixed portion 451 and the second movable portion 452 (improved sealing performance); the second telescopic tube 45 also extends along the X direction. 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 be moved relative to the second fixed portion 451 along the X direction; illustratively, the tube diameter of the second movable portion 452 can be set to be slightly smaller than the tube diameter of the second fixed portion 451, so that the second movable portion 452 can be inserted into 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 (improved sealing performance).

[0079] 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 part 442 and the second movable part 452 is connected to the liquid inlet, and the other is used to communicate with the liquid outlet. Figure 3 As shown, illustratively, the first telescopic tube 44 is connected to the top of the cooling box 41, and the second telescopic tube 45 is connected to the bottom of the cooling box 41, and the position where the second telescopic tube 45 is connected to the bottom of the cooling box 41 and the position where the first telescopic tube 44 is connected to the top of the cooling box 41 are respectively located at the two ends of the cooling box 41 along the X direction. With this arrangement, the coolant that completes the heat exchange can flow more fully and evenly in the cooling box 41, so as to improve the heat dissipation efficiency of the coolant to the charging module.

[0080] In this embodiment, when air cooling is used for heat dissipation, the frame 421 is driven by the electric rod connected to the frame 421 and is placed in the first position close to the cooling box 41, such as Figure 8 、 Figure 9As shown, at this time, the first movable portion 442 extends a short distance from the first fixed portion 441, and the second movable portion 452 extends a short distance from the second fixed portion 451, so that the lengths of the first telescopic tube 44 and the second telescopic tube 45 are also at a relatively short level, thereby making the moving path distance of the coolant flowing from the cooling box 41 to the multiple heat dissipation pipes 422 at a relatively short level; thereby, when the coolant flows in the first telescopic tube 44 and the second telescopic tube 45, the friction resistance encountered is reduced, and the circulation flow rate of the coolant is not significantly affected. 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 quickly between the cooling box 41 and the heat dissipation pipe 422, that is, the reflux time of the coolant is shortened, so that the heat generated by the charging module can be promptly and quickly carried away by the coolant, thereby ensuring efficient heat dissipation of the charging module.

[0081] In this embodiment, the pump body 43 can be provided on the first fixing portion 441 or on the second fixing portion 451, or the pump body 43 can be provided on both the first fixing portion 441 and the second fixing portion 451. The two pump bodies 43 convey the coolant in the same direction, thereby providing a greater conveying speed, so that the coolant circulates faster between the cooling box 41 and the heat dissipation pipe 422, thereby improving the heat dissipation efficiency of the charging module; Figure 3 As 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 box 41, the air cooling module 2 can be arranged between the first telescopic tube 44 and the second telescopic tube 45 to fully utilize the space in the heat exchange cavity 12.

[0082] For example, the first movable part 442 can be extended outward from one end of the first fixed part 441, and the second movable part 452 can be extended outward from one end of the second fixed part 451 and fixedly installed on the frame 421. When the frame 421 moves along the X direction in the heat exchange chamber 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 telescopically move relative to the first fixed part 441 and the second fixed part 451, so as to ensure the connection stability between the first movable part 442, the second movable part 452 and the liquid inlet and the liquid outlet.

[0083] Reference Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 As shown, in one embodiment of the present application, the DC charging pile further includes cabinet doors 13 that can be opened and closed and are arranged on both sides of the cabinet body 1 along the X direction, and the ventilation windows 3 are correspondingly arranged on the cabinet doors 13; wherein the ventilation windows 3 include a frame 31, a fixed plate 32 and a movable plate 33; as shown Figure 5As shown, a ventilation hole 131 for installing the frame 31 is provided on 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 the fastener; Figure 6 、 Figure 7 As shown, a mounting hole 311 for mounting the fixed plate 32 and the movable plate 33 is provided on the frame 31 along the X direction; Figure 5 As shown, the fixed plate 32 and the movable plate 33 both extend along the Y direction. The fixed plate 32 has multiple fixed plates 32 and the multiple fixed plates 32 are fixedly installed in the mounting hole 311 at intervals along the Z direction. There are also multiple movable plates 33, and a movable plate 33 is provided between two adjacent fixed plates 32. The movable plate 33 is rotatably installed on the wall of the mounting hole 311 located between the two adjacent fixed plates 32, so that a flow channel 34 is formed between the adjacent movable plates 33 and the fixed plates 32. The flow channel 34 is used to connect the space inside the cabinet 1 with the external environment; Figure 7 As shown, the movable plate 33 has a contact position with the fixed plate 32. At this time, the flow channel 34 is blocked by the cooperation between the movable plate 33 and the fixed plate 32, and the space inside the cabinet 1 is isolated from the external environment; Figure 6 As 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 1 is connected to the external environment; the fixed plate 32 and the movable plate 33 in this solution are both heat-conducting structural parts, such as copper, aluminum-based composite materials, etc.; thus, when it is windy outdoors, the movable plate 33 is in the contact position and the flow channel 34 is closed, and the heat dissipation pipe 422 is driven to move from the first position to the second position, and the heat dissipation pipe 422 can be in contact with the side of the fixed plate 32 facing the space inside the cabinet 1, or can be in contact with the side of the movable plate 33 facing the space inside the cabinet 1, or can be in contact with both the fixed plate 32 and the movable plate 33 facing the space inside the cabinet 1; when the coolant flows in the heat dissipation pipe 422, the heat carried by the coolant is transferred to the high-speed airflow in the external environment through heat conduction between the heat dissipation pipe 422, and the fixed plate 32 and the movable plate 33, thereby realizing heat dissipation to the outside world.

[0084] In this embodiment, the ventilation window 3 is arranged on the cabinet door 13, which can avoid opening holes on the side walls at other positions in 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 the fixed plate 32 and the movable plate 33 are arranged on the cabinet door 13 that can be opened and closed relative to the cabinet body 1, which 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 them, which is convenient to operate.

[0085] In this embodiment, the movable plate 33 is controlled to rotate between two adjacent fixed plates 32, so that the movable plate 33 rotates between the contact position and the separation position; illustratively, 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; Figure 4 As shown, the second driving member 6 includes: a second gear 62 which is rotatably installed on a side wall of the frame 31 along the Y direction and is sleeved on the rotating shaft of the movable plate 33, 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 to the second rack 61, and a gear system which meshes with the second gear 62 is provided at a position corresponding to each second gear 62 on the second rack 61. By controlling the second electric push rod 63 to extend and retract a preset distance along the Z direction, the second rack 61 is used to drive multiple second gears 62 to rotate synchronously, and then drive multiple movable plates 33 to move between the contact position and the separation position, thereby realizing the control of opening or closing of the flow channel 34, so that the space inside the cabinet 1 is isolated from or connected to the external environment.

[0086] Reference Figure 6 、 Figure 7 As shown, in one embodiment of the present application, the fixed plate 32 includes a first fixed plate 321 and a second fixed plate 322; wherein the second fixed plate 322 has two, and the two second fixed plates 322 are correspondingly connected to the two ends of the first fixed plate 321, and the second fixed plates 322 extend in opposite directions toward the direction 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 arranged, or separately arranged and connected by welding; the movable plate 33 includes a first movable plate 331 and a second movable plate 332, wherein the second movable plate 332 has two, and the two second movable plates 332 are correspondingly connected to the two ends of the first movable plate 331, and the second movable plates 332 extend in opposite directions toward the direction 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 arranged, or separately arranged and connected by welding.

[0087] In this embodiment, if Figure 6 As 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 shown Figure 7 As shown, the second movable plate 332 and the second fixed plate 322 on the adjacent fixed plate 32 and movable plate 33 come into contact with each other, thereby closing the flow channel 34; 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 adjacent second fixed plate 322 and the first fixed plate 321, and the end of the second movable plate 332 away from the first movable plate 331 can also abut against other positions on the adjacent second fixed plate 322, 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.

[0088] 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 adjacent fixed plates 32 and movable plates 33 is also Z-shaped. The flow channel 34 arranged in the Z direction has the following beneficial effects:

[0089] Dust-proof effect: The flow channel 34 is arranged in a Z shape, which 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 hole, and most of the dust will be deposited on the wall surface of the heat dissipation hole during the entry process, rather than directly entering the interior of the cabinet 1.

[0090] 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 entering the flow channel 34, the insects will encounter multiple obstacles and find it difficult to find a path to enter the cabinet 1.

[0091] 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.

[0092] 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 pipe 422 along the Y direction, and the heat dissipation pipe 422 is rotatably installed on the frame 421 via the hollow shaft 4221, and the hollow shaft 4221 is connected to the inside of the heat dissipation pipe 422; a first connecting pipe 423 is respectively provided on both sides of the frame 421 along the Y direction, and the first connecting pipe 423 is used to connect the head and tail of two adjacent heat dissipation pipes 422 in the Z direction; illustratively, the first connecting pipe 423 is rotatably connected to the corresponding hollow shaft 4221 via a rotating joint 4231 to achieve rotational communication between the first connecting pipe 423 and the hollow shaft 4221. In order to ensure that the first connecting pipe 423 has high stability, auxiliary ribs can be used to fix the first connecting pipe 423 on the frame 421, thereby achieving communication between the two adjacent heat dissipation pipes 422 while satisfying the requirement that the angle of the heat dissipation pipe 422 relative to the frame 421 is adjustable.

[0093] For example, Figure 9 、 Figure 10 As shown, one end of the first movable part 442 away from the first fixed part 441 is connected to the drain port via the second connecting tube 424, and one end of the second movable part 452 away from the second fixed part 451 is connected to the liquid inlet via the second connecting tube 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, and a rotating joint is also provided at the connecting portion between the hollow shaft 4221 and the second connecting tube 424 for realizing the rotational connection between the hollow shaft 4221 and the second connecting tube 424.

[0094] In this embodiment, a first driving member 5 is provided for driving the heat dissipation pipe 422 to rotate relative to the frame 421; 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 on the hollow shaft 4221, and is connected to a first rack 51 that moves along the Z direction on the frame 421. A gear system that meshes with the first gear 52 is provided at a position corresponding to each first gear 52 on the first rack 51. A first electric push rod 53 is fixed at a suitable position on the frame 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 421, thereby adjusting the angle of the heat dissipation pipe 422 relative to the frame 421 through the first rack 51 and the first gear 52; Figure 8As shown, when the air-cooling heat dissipation mode is adopted, the heat pipes 422 are all arranged horizontally. At this time, the forced convection generated by the operation of the air-cooling module 2 can pass through the upper and lower surfaces of the heat pipe 422 respectively, thereby increasing the contact area between the cold air flow and the heat pipe 422 as much as possible, so as to achieve high-efficiency heat dissipation of the coolant flowing through the heat pipe 422; illustratively, the heat pipe 422 is arranged as a whole in a rectangular parallelepiped. Based on this setting, the two narrower sides of the heat pipe 422 are arranged in sequence along the direction of air flow movement, and the two wider sides of the heat pipe 422 are arranged in sequence perpendicular to the direction of cold air flow movement, so that when the cold air flow flows through the heat pipe 422, the cold air flow can contact the two wider sides of the heat pipe 422, thereby having a larger contact area with the heat pipe 422 and achieving high-efficiency heat dissipation.

[0095] In this embodiment, when heat conduction is used for heat dissipation, as shown in FIG. Figure 11 、 Figure 12 As shown, first, the angle of the heat dissipation pipe 422 relative to the frame 421 is adjusted by the first driving member 5, 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 pipe 422 is consistent with the inclination direction of the second fixed plate 322 on the fixing plate 32 facing the side of the inner space of the cabinet 1; thus, when the plurality of heat dissipation pipes 422 are moved from the first position to the second position, each of the heat dissipation pipes 422 arranged in an inclined manner can better fit and contact the second fixed plate 322 on the side close to the inner space of the cabinet 1 (as shown in FIG. Figure 12 As described above), the contact area between the heat dissipation pipe 422 and the second fixed plate 322 can be increased, thereby achieving higher heat transfer efficiency (the heat transfer efficiency is proportional to the contact area between the two), which is used to dissipate heat more efficiently for the coolant flowing through the heat dissipation pipe 422.

[0096] For example, in order to allow the heat pipe 422 to have a larger contact surface with the second fixed plate 322 to achieve a more efficient heat conduction, in this embodiment, as shown in FIG. Figure 12 As shown, the hollow shaft 4221 connected to the heat dissipation pipe 422 can be set on the side of the heat dissipation pipe 422 close to the cooling box 41, that is, the hollow shaft 4221 is not set in the middle position of the heat dissipation pipe 422. With this arrangement, when the heat dissipation pipe 422 rotates at a preset angle, most of the area of ​​the heat dissipation pipe 422 facing the second fixed plate 322 can contact the second fixed plate 322, so as to avoid the presence of the first gear 52 and hindering the heat dissipation pipe 422 from contacting the second fixed plate 322; or the length of the second fixed plate 322 facing the space inside the cabinet 1 can be set longer (such as Figure 12As shown in the figure, the second fixed plate 322 in contact with the heat dissipation pipe 422 is made to pass over 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 heat dissipation pipe 422 is made to contact the second fixed plate 322 on the side facing the second fixed plate 322 (further improving the heat transfer efficiency). However, due to this arrangement, when the flow channel 34 is in the open state, an excessively long second fixed plate 322 will hinder the airflow from entering the flow channel 34 or being discharged from the flow channel 34. Therefore, the length of the second fixed plate 322 on the side close to the space inside the cabinet 1 should not be set too long, and a suitable length can be selected.

[0097] Reference Figure 14 As shown, in one 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, in short, a certain negative pressure state can be maintained; a capillary core 7 is fitted on the inner wall of the negative pressure cavity 323. For example, the capillary core 7 can be made of a porous material, such as sintered metal powder, metal mesh or fiber material. The capillary core 7 is used to absorb and store a certain amount of coolant, and to transfer the coolant in liquid state to the capillary action. Reflux from the lower temperature end to the higher temperature end; in this embodiment, the capillary core 7 needs to have a higher porosity and a small pore size, because the capillary force of the capillary core 7 depends on the porosity, pore size and material properties of the capillary core 7; higher porosity and smaller pore size have stronger capillary force, which can more effectively make the coolant condensed into liquid flow back to the higher temperature end; illustratively, the coolant can be water, ethanol, acetone or Freon, silicone oil, etc., all of the above coolants are used to absorb heat and evaporate at high temperature, and then condense into liquid at low temperature, and under the action of the capillary core 7, flow back from the low temperature to the high temperature, thereby realizing circulation.

[0098] In this embodiment, when the heat dissipation pipe 422 is in the second position and contacts the second fixed plate 322 on the side close to the space inside the cabinet 1, the second fixed plate 322 on the side close to the cabinet 1 contacts the heat dissipation pipe 422 with a higher temperature, which is a hot end; the second fixed plate 322 on the side away from the cabinet 1 is exposed to the outdoor environment and is always blown by the high-speed air flow in windy weather, which is a cold end; when there is strong wind outdoors, heat conduction and heat dissipation are carried out to the environment inside the cabinet 1, that is, the heat dissipation pipe 422 is moved from the first position to the second position, and the heat dissipation pipe 422 is directed toward the side of the fixed plate 32 and contacts the second fixed plate 322 on the side close to the cabinet 1, thereby transferring the heat carried by the coolant in the heat dissipation pipe 422 to the above-mentioned hot end, and causing the coolant in the capillary wick 7 at the hot end position to be heated and evaporated (so that the air pressure near the hot end is increased). At this time, the air pressure in the above-mentioned cold end area is relatively small, thereby generating an air pressure difference between the hot end and the cold end, thereby generating Under the action of the air pressure difference, the gas moves along the channel toward the cold end (causing a decrease in the amount of coolant absorbed and stored in the capillary wick 7 at the hot end). As the gas moves, when it encounters the cavity wall with a lower temperature at the cold end, the temperature drops, causing the gas to condense and turn into liquid (causing an increase in the amount of coolant absorbed and stored in the capillary wick 7 at the cold end). A large amount of heat is released during the condensation process, and this part of the heat is transferred away by the strong wind outside. The coolant condensed into liquid flows back to the hot end under the capillary action of the capillary wick 7 (the amount of coolant absorbed and stored in the hot and cold end areas of the capillary wick 7 is different. In order to maintain balance, the coolant in the capillary wick 7 at the cold end will flow back to the capillary wick 7 at the hot end under the capillary force of the capillary wick 7). The coolant that flows back to the hot end is used to absorb the heat transferred from the coolant in the heat pipe 422 again. By repeating the above process, a high-efficiency heat dissipation effect of the coolant flowing through the heat pipe 422 can be achieved.

[0099] In this embodiment, when encountering strong winds in the room, heat conduction is used to dissipate heat from the environment inside the cabinet 1, that is, the heat pipe 422 is brought into contact with the first fixed plate 321 on the fixed plate 32 close to the inner side of the cabinet 1, and the capillary core 7 and the coolant provided in the fixed plate 32 are used to cooperate to achieve efficient heat dissipation of the cooling liquid flowing through the heat pipe 422; in this embodiment, the coolant in the negative pressure cavity 323 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-conducting elements, and can reach hundreds of times or even higher than that of traditional metal heat-conducting materials. Thousands of times; thus, when there is strong wind outdoors, the liquid phase change process of the coolant in the negative pressure chamber 323 in the fixed plate 32 is utilized to achieve high-efficiency heat dissipation of the coolant flowing through the heat pipe 422. While preventing the air with a high dust concentration in the outdoor air from entering the cabinet 1, the outdoor strong wind is also utilized to cool down and dissipate the heat of the above-mentioned cold end (that is, the second fixed plate 322 on the fixed plate 32 exposed to the outdoor side) (transferring the heat carried by the coolant to the external environment), thereby achieving high-efficiency heat dissipation even when the environment inside the cabinet 1 is isolated from the external environment.

[0100] For example, when the environment inside the cabinet 1 is isolated from the external environment, the fixed plate 32 in contact with the heat pipe 422 is responsible for efficiently dissipating heat for the coolant flowing through the heat pipe 422, while the fixed plate 32 and the movable plate 33 that are not in contact with the heat pipe 422 directly transfer heat to the higher temperature air inside the cabinet 1, and exchange heat between the fixed plate 32 and the movable plate 33 and the fast-flowing airflow outside, thereby achieving a heat conduction and heat dissipation effect; in this embodiment, while heat conduction and heat dissipation of the coolant flowing through the heat pipe 422 are achieved 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 achieved simultaneously, thereby significantly improving the heat dissipation efficiency.

[0101] Reference Figure 12 As shown, in one embodiment of the present application, 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 encapsulated 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; preferably, in order to improve the heat dissipation efficiency of the coolant flowing through the heat pipe 422, the second fixed plate 322 on the side close to the cabinet 1 space is completely encapsulated in the cabinet 1 space, so that the second fixed plate 322 on the side away from the cabinet 1 space 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 in the adjacent position is abutted against the connection between the second fixed plate 322 and the first fixed plate 321 (as shown in FIG. 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; thus, 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 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 high-efficiency heat transfer.

[0102] Reference Figure 2 、 Figure 3 As shown, in one embodiment of the present application, the DC charging pile also includes a partition 14 provided 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 cavity 11 and a heat exchange cavity 12. In the X direction, the partition 14 is penetrated by a through-hole (not shown in the figure) for connecting the placement cavity 11 and the heat exchange cavity 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 cavity 11 and the heat exchange cavity 12 through the through-hole provided on the partition 14; in this solution, the ventilation window 3 close to the placement cavity 11 is set as the air inlet side, and the ventilation window 3 close to the heat exchange cavity 12 is set as the air outlet side.

[0103] For example, 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 solution 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 will reduce the heat dissipation efficiency over time and easily cause 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.

[0104] In summary, this solution is achieved by arranging matching fixed plates 32 and movable plates 33, as well as movable heat sinks 4 on the ventilation windows 3 of the cabinet 1; thereby, when the dust concentration in the outdoor air is low (breezy weather), the flow channel 34 between the fixed plates 32 and the movable plates 33 is in an open state, for air-cooling and dissipating the heat inside the cabinet 1; when the dust concentration in the outdoor air is high (windy weather), the flow channel 34 between the fixed plates 32 and the movable plates 33 is in a closed state, and the heat sink 4 is moved to a contact position with the fixed plates 32, thereby achieving heat conduction and dissipation of the heat inside the cabinet 1; and better avoiding the occurrence of windy weather. When cooling the environment inside the cabinet 1, a large amount of dust may easily enter the cabinet 1, resulting in reduced heat dissipation efficiency and stability of use. At the same time, the flow channel 34 between the adjacent fixed plates 32 and the movable plates 33 is arranged in a Z shape when in the open state, so as to realize air cooling and heat dissipation for the environment inside the cabinet 1 while preventing dust, debris, etc. from entering the cabinet 1 in the external environment. In addition, by arranging a negative pressure cavity 323, a capillary core 7, a coolant, etc. in the fixed plate 32, the cooling and heat dissipation efficiency of the environment inside the cabinet 1 during heat conduction heat dissipation is further improved, and while preventing the intrusion of dust from the external environment in windy weather, high-efficiency cooling is ensured.

[0105] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A DC charging pile having two intersecting X, Y and Z directions, characterized in that: include: The cabinet (1) has a placement cavity (11) and a heat exchange cavity (12) that are connected to each other. In the X direction, the placement cavity (11) and the heat exchange cavity (12) are arranged in sequence, and the placement cavity (11) is used to place the charging module; An air cooling module (2) is arranged in the heat exchange chamber (12); At least two ventilation windows (3) are provided, and the at least two ventilation windows (3) are respectively provided on two side walls of the cabinet (1) along the X direction; the ventilation windows (3) are in a closed position, used to seal the cabinet (1); the ventilation windows (3) are in an open position, used to allow the cabinet (1) to communicate with the outside world; as well as A heat sink (4), the heat sink (4) comprising: a cooling box (41), disposed in the placement cavity (11), the cooling box (41) being used to contain a charging module and a coolant, so that the charging module is immersed in the coolant; and a heat sink (42), having a liquid inlet and a liquid outlet communicated with the cooling box (41); The heat sink (42) comprises: a frame (421) movably arranged in the heat exchange cavity (12); and a plurality of heat dissipation pipes (422) spaced apart along the Z direction, extending along the Y direction and mounted on the frame (421); two adjacent heat dissipation pipes (422) are connected end to end; one of the two heat dissipation pipes (422) at both ends in the Z direction is provided with the liquid inlet, and the other is provided with the liquid outlet; The heat sink (42) 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 sink (42) is in the first position for air-cooling the charging module; when the ventilation window (3) is in the closed position, the heat sink (42) is in the second position for heat conduction and heat dissipation of the charging module; The ventilation window (3) comprises: a frame (31) provided with a mounting hole (311); and a fixed plate (32) having a plurality of holes spaced apart along the Z direction and extending along the Y direction, and the fixed plate (32) is arranged in the mounting hole (311); a movable plate (33) rotatably mounted between two adjacent fixed plates (32) to form a flow channel (34) communicating with the cabinet (1) and the outside between the adjacent fixed plates (32) and the movable plate (33); the movable plate (33) has a contact position for contacting the fixed plate (32) and a separation position for separating from the fixed plate (32); when the movable plate (33) is in the contact position, the flow channel (34) is closed, so that 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, so that the ventilation window (3) is in the open position; the movable plate (33) and the fixed plate (32) are both heat-conducting structural parts; The fixing plate (32) comprises: a first fixing plate (321); and two second fixing plates (322), wherein the two second fixing plates (322) are connected to two ends of the first fixing plate (321) respectively, and the two second fixing plates (322) extend in opposite directions away from the first fixing plate (321); 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 a separated position, the flow channel (34) is in a Z shape; The heat dissipation pipe (422) has a rectangular cross-section and is rotatably mounted on the frame (421), with the rotation axis of the heat dissipation pipe (422) extending along the Y direction; when the heat dissipation rib (42) is in the first position, each heat dissipation pipe (422) is arranged horizontally; when the heat dissipation rib (42) is in the second position, the heat dissipation pipe (422) rotates at a preset angle, so that at least a portion of the heat dissipation pipe (422) facing the ventilation window is in corresponding contact with the second fixed plate (322) on the side close to the space of the cabinet (1).

2. The DC charging pile according to claim 1, characterized in that: The heat sink (4) further comprises: The pump body (43) is arranged on the cooling box (41), and the pump body (43) allows the cooling liquid to circulate between the cooling box (41) and the heat sink (42) through the liquid inlet and the liquid outlet.

3. The DC charging pile according to claim 2, characterized in that: The heat sink (4) further comprises: a first telescopic tube (44) extending along the X-direction, the first telescopic tube (44) having a first fixed portion (441) and a first movable portion (442) communicating with each other, the first movable portion (442) being movable along the X-direction; the first fixed portion (441) being used to communicate with the cooling box (41), and the first movable portion (442) being used to communicate with one of the liquid inlet and the liquid outlet; and a second telescopic tube (45) extending along the X-direction, the second telescopic tube (45) having a second fixed end and a second movable portion (452) communicating with each other, the second movable portion (452) being movable along the X-direction; the second fixed end being used for communicating with the cooling box (41), and the second movable portion (452) being used for communicating 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).

4. The DC charging pile according to claim 3, characterized in that: The DC charging pile further comprises cabinet doors (13) which can be opened and closed and are arranged on both sides of the cabinet body (1) along the X direction, and the ventilation windows (3) are correspondingly arranged on the cabinet doors (13).

5. The DC charging pile according to claim 4, characterized in that: The movable plate (33) comprises: a first movable plate (331), the first movable plate (331) being rotatably mounted in the mounting hole (311), and the rotation axis of the first movable plate (331) extending along the Y direction; and There are two second movable plates (332), and the two second movable plates (332) are correspondingly connected to the two ends of the first movable plate (331), and the two second movable plates (332) extend in opposite directions away from the first movable plate (331).

6. The DC charging pile according to claim 5, characterized in that: The fixed 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). The coolant can be converted between liquid and gaseous states within a preset temperature range.

7. The DC charging pile according to claim 6, characterized in that: 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.

8. The DC charging pile according to claim 6, 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, a through hole for connecting the placement cavity (11) and the heat exchange cavity (12) is provided through the partition (14), and the air cooling module (2) is arranged at a position corresponding to the through hole.

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