Cabinet heat dissipation structure and top air-out liquid cooling converter

Abstract

The invention provides a cabinet heat dissipation structure and a top air-out liquid cooling converter. A cabinet is provided with a closed installation cavity used for installing electronic components. The cabinet heat dissipation structure comprises a first heat dissipation system, a second heat dissipation system, a heat exchange air duct and a heat exchange fan. The first heat dissipation system comprises a device heat dissipation part and a first external heat exchange part which are communicated with each other, and circulates a first cooling medium. The second heat dissipation system comprises a cavity heat dissipation part, a second external heat exchange part and a turbulent flow fan which are communicated with one another, and a second cooling medium circulates. The device and the cavity heat dissipation part are positioned in the mounting cavity; and the two external heat exchange parts are positioned outside the mounting cavity. And projections of the two external heat exchange parts are not overlapped on a projection surface perpendicular to the air passing direction. The first external heat exchange part is closer to the heat exchange fan than the second external heat exchange part, the first external heat exchange part adopts corrugated cooling fins, and the second external heat exchange part adopts straight cooling fins to balance air flow. The cabinet heat dissipation structure can improve the heat dissipation effect of electronic components in the electrical cabinet.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cabinet heat dissipation, in particular to a cabinet heat dissipation structure and an air-out liquid-cooled converter. BACKGROUND

[0002] Electrical cabinets (such as energy storage cabinets, converter cabinets, etc.) usually have a large number of power electronic components integrated inside. These components will generate significant heat during operation, and if the heat cannot be effectively dissipated in time, it will lead to excessive temperature rise, affecting the reliability of the equipment and even causing failure. Especially for applications deployed outdoors or with high requirements for environmental protection level (such as meeting the IP65 protection standard), the cavity inside the cabinet for installing electronic components needs to be relatively isolated from the external environment to prevent rainwater, dust, etc. from entering. However, this closed structure makes the traditional direct ventilation air cooling dissipation method inapplicable. Although air conditioners or refrigeration units can be used for active cooling, such solutions not only have complex systems and high energy consumption, but also significantly increase equipment costs and maintenance difficulty, making it difficult to meet the thermal management needs of high-performance and high-reliability energy storage systems. SUMMARY

[0003] The purpose of the present application is to overcome the above-mentioned defects or problems existing in the background art, and to provide a cabinet heat dissipation structure and an air-out liquid-cooled converter, which can improve the heat dissipation effect of electronic components in the electrical cabinet.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions: A cabinet heat dissipation structure, the cabinet is provided with a closed installation chamber, the installation chamber is used for installing electronic components, comprising: a first heat dissipation system, which comprises a device heat dissipation part and a first external heat exchange part which are communicated with each other to circulate a first cooling medium; the device heat dissipation part is located in the installation chamber and is adapted to be in contact with at least part of the electronic components for heat exchange; the first external heat exchange part is located outside the installation chamber and is adapted to be in contact with the external air for heat exchange to reduce the temperature of the first cooling medium; a second heat dissipation system, which comprises a chamber heat dissipation part and a second external heat exchange part which are communicated with each other to circulate a second cooling medium, and at least one turbulence fan; the chamber heat dissipation part is located in the installation chamber, and the turbulence fan is used to drive the air in the installation chamber to pass through the chamber heat dissipation part; the second external heat exchange part is located outside the installation chamber and is adapted to be in contact with the external air for heat exchange to reduce the temperature of the second cooling medium; a heat exchange air duct is provided outside the installation chamber and is provided with an air inlet and an air outlet; the direction in which the air inlet points to the air outlet is defined as the air passing direction; on at least one projection plane perpendicular to the air passing direction, at least part of the projection of the first external heat exchange part corresponding to the same air inlet and at least part of the projection of the second external heat exchange part do not overlap; and a heat exchange fan is adapted to drive the air in the heat exchange air duct to flow along the air passing direction; corresponding to the same air inlet, the first external heat exchange part is closer to the heat exchange fan than the second external heat exchange part, and the first external heat exchange part adopts corrugated heat dissipation fins, and the second external heat exchange part adopts flat heat dissipation fins, so as to balance the air flow passing through the first external heat exchange part and the second external heat exchange part.

[0005] The cabinet heat dissipation structure can be applied to a cabinet provided with a closed installation chamber, the device heat dissipation part in the first heat dissipation system of the cabinet heat dissipation structure can efficiently dissipate heat for the electronic components by being in contact with the electronic components, and the chamber heat dissipation part in the second heat dissipation system can form air flow circulation in the installation chamber through the turbulence fan, the air temperature is reduced after passing through the chamber heat dissipation part and is transported to the position of the electronic components, and then the air temperature is increased and is transported to the position of the chamber heat dissipation part for recooling. Through the cooperation of the two different heat dissipation modes of the first heat dissipation system and the second heat dissipation system in the installation chamber, the heat dissipation of the electronic components in the cabinet provided with the closed installation chamber can be realized with high cost performance and high reliability.

[0006] On this basis, the first heat dissipation system and the second heat dissipation system are further provided with a first external heat exchange part and a second external heat exchange part outside the installation chamber, and the two external heat exchange parts are used to reduce the temperature of the first cooling medium and the second cooling medium by exchanging heat with air outside with low temperature. Wherein, the installation chamber is provided with a heat exchange air duct, and the first external heat exchange part and the second external heat exchange part are arranged at at least one air inlet position of the heat exchange air duct, and the key is that the projections of the first external heat exchange part and the second external heat exchange part do not overlap each other in the projection plane perpendicular to the air flow direction. Through this layout, the two external heat exchange parts share the same heat exchange air duct, but because the projections of the two external heat exchange parts do not overlap in the air flow cross section, the external low-temperature air can flow through the heat exchange surfaces of the two external heat exchange parts independently and simultaneously, avoiding the problem of heat superposition in the traditional series ventilation mode. And compared with the scheme of arranging two independent heat exchange air ducts to independently exchange heat for the two external heat exchange parts, because the two external heat exchange parts only use one heat exchange air duct and share one heat exchange fan, the whole cabinet heat dissipation structure is more compact, and at the same time, the heat exchange air duct can maintain a larger air volume, thereby providing a larger effective air inlet and heat exchange area, and ensuring the overall heat dissipation capacity of the first heat dissipation system and the second heat dissipation system.

[0007] And, in the two external heat exchange parts corresponding to the same air inlet, the first external heat exchange part is arranged closer to the heat exchange fan, which can provide higher heat exchange efficiency for the first heat dissipation system which bears the main heat generating complex. However, this layout will cause the first external heat exchange part to reduce the air volume of the second external heat exchange part due to being closer to the heat exchange fan than the second external heat exchange part, thereby affecting the heat exchange efficiency of the second heat dissipation system. Therefore, the first external heat exchange part is specially arranged to adopt corrugated heat dissipation fins, and the second external heat exchange part adopts flat heat dissipation fins. The corrugated heat dissipation fins have more tortuous air flow paths than the flat heat dissipation fins, so that the air flow passing through the corrugated heat dissipation fins has greater air resistance, thereby forcing the air flow to pass through the first external heat exchange part and the second external heat exchange part more evenly when entering the heat exchange air duct from the corresponding same air inlet, realizing the optimized matching of air volume and air resistance between the two heat dissipation systems, effectively avoiding the heat exchange efficiency of the second heat dissipation system from being reduced due to insufficient air volume, ensuring the uniformity and reliability of the overall heat dissipation of the cabinet, and finally maximizing the overall heat dissipation efficiency in a compact structure space.

[0008] The technical means is not simply using two existing types of heat dissipation fins, and the focus is to use the two types of heat dissipation fins together to solve the problem of inconsistent wind flow to the two external heat exchange parts caused by the specific layout of the external heat exchange part and the heat exchange fan in the scheme. The scheme does not use conventional means such as increasing fan power, setting flow guide baffles, or expanding the volume of the air duct, but designs two types of heat dissipation fins with different resistance characteristics, and uses the reverse offset of the two to achieve self-balancing of the air volume. Although the two types of heat dissipation fins are mature technologies, the complete technical means of the scheme is to use them together in a specific air duct layout to achieve air volume balance of the two external heat exchange parts at the same air inlet. It is easy to understand that this combination is the key technical means adopted by the scheme, and the use of the two types of heat dissipation fins cannot be considered separately. Moreover, the selection of the type of heat dissipation fin in the scheme is not arbitrary. The corrugated heat dissipation fin has a relatively tortuous air flow path, but the longer air flow path allows the air flow to contact the fin wall of the heat dissipation fin for a longer time, and the fin wall area of the corrugated heat dissipation fin is also larger, thereby improving the unit efficiency of air flow heat exchange, which ensures that the heat exchange efficiency of the second heat dissipation system will not be greatly affected by the increase in air resistance. Compared with other fin types that can increase air resistance, such as louvered heat dissipation fins or sawtooth heat dissipation fins, a better balance between increasing air resistance and ensuring heat exchange efficiency can be achieved.

[0009] In at least one embodiment, the fin wall of the corrugated heat dissipation fin is provided with a plurality of ribs protruding therefrom and spaced apart in the air flow direction, and the ribs extend perpendicular to the air flow direction.

[0010] By providing ribs on the fin wall of the corrugated heat dissipation fin, the structure of the ribs protruding from the fin wall can be used to destroy the laminar flow formed near the fin wall when the air flow passes through the heat dissipation fin, induce micro-scale peeling and periodic vortexes, and enable the cold air at the center of the air duct to exchange energy with the fin wall more frequently, thereby significantly enhancing the convective heat exchange effect of the fin surface. In the specific air duct layout of the scheme, the ribs can further regulate the air resistance of the corrugated heat dissipation fin on the one hand, and guide the air flow to be evenly distributed to the second external heat exchange part at the far end; on the other hand, this forced flow mechanism can improve the heat exchange efficiency per unit area, so that the first external heat exchange part can still remove the heat of the power components by virtue of the high heat exchange efficiency even in the case of high air resistance and limited local flow rate.

[0011] In at least one embodiment, the heat exchange fan is located at the air outlet of the heat exchange air duct.

[0012] The heat exchange fan is arranged at the air outlet of the heat exchange air duct, so that the suction of the fan directly acts on the outlet area of the heat exchange air duct. This arrangement shortens the hot air discharge path, reduces the air duct bending and flow resistance, and compared with the layout in which the fan is located at the middle or air inlet side of the air duct, can improve the air flow efficiency and reduce the power consumption of the fan caused by wind pressure loss.

[0013] In at least one embodiment, the heat exchange air duct comprises a first air inlet, which is arranged to be inclined relative to the horizontal plane to draw air from the side of the cabinet and to be arranged with at least part of the first external heat exchange part and the second external heat exchange part.

[0014] The first air inlet of the heat exchange air duct is arranged to be inclined relative to the horizontal plane, so that external air enters from the side of the cabinet along the inclined direction and is vertically discharged through the top. This air duct layout conforms to the natural convection trend and can maximize the heat exchange area of the external heat exchange part, so that efficient heat dissipation can be achieved in the limited space at the top of the cabinet.

[0015] In at least one embodiment, the heat exchange air duct further comprises a second air inlet, which is arranged to be inclined relative to the horizontal plane and arranged side by side with the first air inlet along a horizontal first direction, and the air inlet directions of the two air inlets are opposite; and the second air inlet is arranged with at least part of the first external heat exchange part and the second external heat exchange part perpendicular to the air inlet direction.

[0016] The second air inlet is added on the basis of the first air inlet, and the two air inlets are arranged side by side along the horizontal direction and have opposite air inlet directions, and the first external heat exchange part and the second external heat exchange part are arranged in both air inlets. This symmetrical two-way air inlet can make external air flow into the cabinet from both sides simultaneously, improve air inlet efficiency and increase heat exchange area, balance the pressure distribution in the heat exchange air duct, and reduce the air flow deflection or uneven wind speed on the surface of the heat exchanger caused by one-sided air inlet. By arranging the external heat exchange part in both the first air inlet and the second air inlet, compared with the scheme of arranging the second external heat exchange part only in a single air inlet, the problem of uneven air temperature rise after air inlet in the two air inlets of the heat exchange air duct caused by inconsistent heat exchange efficiency of the second external heat exchange part and the first external heat exchange part can be improved.

[0017] In at least one embodiment, the heat exchange air duct further comprises a second air inlet, which is arranged to be inclined relative to the horizontal plane and arranged side by side with the first air inlet along a horizontal first direction, and the air inlet directions of the two air inlets are opposite; and the second air inlet is arranged with at least part of the first external heat exchange part.

[0018] The second air inlet is only provided with the first external heat exchange part, and the first air inlet is provided with the first external heat exchange part and the second external heat exchange part, so that the second external heat exchange part can be concentrated at one air inlet, and does not need to be inclined to two air inlets respectively, and the arrangement of the second external heat exchange part is more simple and convenient.

[0019] In at least one embodiment, the second heat dissipation system, the chamber heat dissipation part is located in the middle region of the cabinet in the first direction; the heat exchange air duct, the first external heat exchange part and the second external heat exchange part are located at the top of the cabinet, and in the heat exchange air duct, the bottom of the first air inlet and the second air inlet corresponds to the position of the chamber heat dissipation part, so that the second external heat exchange part communicates with the chamber heat dissipation part.

[0020] The chamber heat dissipation part is arranged in the middle region of the cabinet in the first direction, so that the turbulence fan is also arranged in the middle region of the installation chamber, and the air inlet and air outlet regions of the turbulence fan have sufficient space for air flow, thereby improving the air cooling heat dissipation of the electronic components in the installation chamber by the turbulence fan. In addition, the bottom of the two air inlets of the heat exchange air duct is also arranged in the middle region, so that the chamber heat dissipation part and the second external heat exchange part are conveniently communicated.

[0021] In at least one embodiment, the first heat dissipation system further comprises a communication pipeline, and the device heat dissipation part and the first external heat exchange part circulate and flow through the first cooling medium through the communication pipeline; the first cooling medium is a liquid cooling medium without phase change.

[0022] The first cooling medium adopts a liquid cooling medium without phase change, and the device heat dissipation part and the first external heat exchange part in the first heat dissipation system are communicated and circulate and flow through the first cooling medium through the communication pipeline. Compared with the conventional air cooling heat dissipation mode, the liquid cooling medium can better take away the heat of the electronic components by the higher specific heat capacity.

[0023] In at least one embodiment, the second heat dissipation system comprises a plurality of heat pipes with phase change heat exchange capacity, and the second cooling medium is a phase change cooling medium circulating in the heat pipes; the heat pipes penetrate the cavity wall of the installation chamber, the chamber heat dissipation part corresponds to the evaporation section of the heat pipes, and the second external heat exchange part corresponds to the condensation section of the heat pipes.

[0024] The second heat dissipation system adopts the heat pipes with the phase change cooling medium, and utilizes the phase change circulation of the working medium to absorb heat and vaporize in the evaporation section and release heat and liquefy in the condensation section to transfer heat. This heat dissipation mode can realize large heat flux density heat dissipation under a small temperature difference, and significantly improves the heat exchange efficiency of the chamber heat dissipation part compared with the cavity heat dissipation mode relying only on air natural convection or single-phase forced convection.

[0025] The application also provides the technical scheme as follows: a top air-out liquid-cooled converter, comprising a cabinet, the cabinet is provided with a closed installation chamber, the installation chamber is used for installing electronic components, at least part of the electronic components constitutes a power assembly for conversion, the cabinet heat dissipation structure as claimed in any one of the above is adopted, at least part of the electronic components in the power assembly is cooled through the cabinet heat dissipation structure, and the heat exchange fan in the cabinet heat dissipation structure is arranged on the top of the cabinet to blow air upward.

[0026] The cabinet of the top air-out liquid-cooled converter can simultaneously perform double heat dissipation through the first heat dissipation system and the second heat dissipation system due to the adoption of the cabinet heat dissipation structure, high-efficiency heat dissipation of the electronic components in the closed installation chamber is realized, and the top air-out liquid-cooled converter has the advantages of high cost performance and high reliability. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme of the embodiments of the application, the drawings needed in the embodiment description are briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 Structure diagram of the top air-out liquid-cooled converter Figure 1 ; Figure 2 Structure diagram of the top air-out liquid-cooled converter Figure 2 ; Figure 3 Structure diagram of the first external heat exchange part corresponding to the second air inlet in Figure 2 ; Figure 4 Structure diagram of the second external heat exchange part corresponding to the second air inlet in Figure 2 ; Figure 5 Air speed simulation diagram in which only the first external heat exchange part is arranged at the second air inlet; Figure 6 Air speed simulation diagram in which the first external heat exchange part and the second external heat exchange part are arranged at the second air inlet.

[0029] Main drawing mark explanation: Cabinet 100; installation chamber 101; First external heat exchange part 210; heat exchange pipe fitting 211; corrugated heat dissipation fin 212; convex rib 213; Chamber heat dissipation part 310; second external heat exchange part 320; heat pipe 321; evaporation section 322; condensation section 323; flat heat dissipation fin 324; turbulence fan 330; Heat exchange air duct 400; first air inlet 411; second air inlet 412; air outlet 420; Heat exchange fan 500; heat exchange fan positioning plate 510; heat exchange fan mounting hole 511. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are preferred embodiments of the present application, and should not be regarded as exclusion of other embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] In the claims, the specification, and the above drawings of the present application, unless otherwise expressly limited, the use of the terms "first", "second", or "third" etc. is to distinguish different objects, and is not to describe a particular order.

[0032] In the claims, the specification, and the above drawings of the present application, unless otherwise expressly limited, for orientation words, such as the use of the terms "center", "lateral", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "back", "left", "right", "clockwise", "counterclockwise" etc. indicate the orientation or positional relationship based on the orientation and position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, so it cannot be understood as limiting the specific protection scope of the present application.

[0033] In the claims, the specification, and the above drawings of the present application, unless otherwise expressly limited, such as the use of the terms "fixedly connected" or "fixedly connected", should be broadly understood, that is, any connection mode between the two without displacement relationship and relative rotation relationship, that is, it includes non-detachable fixed connection, detachable fixed connection, integration and fixed connection through other devices or elements.

[0034] In the claims, the specification, and the above drawings of the present application, the use of the terms "include", "have" and their variants is intended to mean "include but not limited to".

[0035] Embodiments Reference Figure 1 And Figure 2The embodiment of the present application relates to a top-out air liquid-cooled converter, which adopts a cabinet heat dissipation structure provided by the present application.

[0036] The top-out air liquid-cooled converter refers to a converter device that uses a liquid cooling method to dissipate heat from part of the electronic components inside the energy storage converter. The energy storage converter is the core device in the energy storage system, and its main function is to realize the bidirectional conversion of electric energy: when charging, it converts the grid AC power into DC power and stores it in the battery; when discharging, it converts the battery DC power into AC power and feeds it back to the grid. The energy storage converter integrates a large number of power electronic components, including but not limited to IGBT modules, rectifiers, inverters, capacitors, and inductors. These components generate a large amount of heat during high-power operation, especially under high-current working conditions, and the heat loss increases significantly. If these heat cannot be effectively dissipated in time, it will cause the temperature of the components to be too high, affecting the efficiency and service life of the device, and even causing safety problems such as thermal runaway. The traditional air cooling method uses air convection to dissipate heat, but for high-power density energy storage converters, the efficiency of air cooling is limited and cannot meet the heat dissipation requirements. Therefore, using liquid cooling becomes a better choice. Liquid cooling uses cooling liquid as the heat transfer medium, which can more efficiently dissipate heat through direct contact with the heat-generating components or through a cold plate. The specific heat capacity of the cooling liquid is much higher than that of air, and the heat transfer efficiency is higher, and more uniform temperature distribution can be achieved to avoid local overheating.

[0037] The top-out air liquid-cooled converter according to the present embodiment mainly includes a cabinet 100, electronic components installed inside the cabinet 100, a first heat dissipation system, a second heat dissipation system, a heat exchange air duct 400, and a heat exchange fan 500. The cabinet 100 is provided with a closed installation chamber 101, and the installation chamber 101 is used to install electronic components, at least part of which constitutes a power assembly for conversion. In the present embodiment, at least part of the electronic components are installed in the installation chamber 101, and the power assembly is composed of part of the electronic components, which mainly includes IGBT modules as switching tubes, capacitors, and capacitor busbars, etc.

[0038] The top-out air liquid-cooled converter adopts the cabinet heat dissipation structure provided by the present embodiment, and at least part of the electronic components in the power assembly are cooled by the cabinet heat dissipation structure. The heat exchange fan 500 in the cabinet heat dissipation structure is arranged at the top of the cabinet 100 to blow air upward. The cabinet heat dissipation structure mainly includes the first heat dissipation system, the second heat dissipation system, the heat exchange air duct 400, and the heat exchange fan 500.

[0039] Referring to Figure 1 and Figure 2 , the first heat dissipation system includes a component heat dissipation part, a first external heat exchange part 210, and a communication pipeline.

[0040] The device heat dissipation section and the first external heat exchange section 210 are interconnected to circulate the first cooling medium. In this embodiment, the device heat dissipation section and the first external heat exchange section 210 are interconnected through a connecting pipe, and the first cooling medium is a liquid cooling medium that does not undergo phase change. The first cooling medium is preferably a coolant with good thermal conductivity and insulation properties, such as deionized water or a special coolant. The device heat dissipation section is located in the mounting chamber 101 and is adapted to contact at least some of the electronic components for heat exchange. Specifically, the device heat dissipation section is mainly composed of a cold plate, which is in close contact or direct contact with key heat-generating components in the power assembly, such as IGBT modules. As the core switching element of the energy storage converter, the IGBT module generates a large amount of heat during high-frequency switching. The cold plate, through its internal microchannel structure, allows the coolant to flow over the surface of the heat-generating components, efficiently removing heat.

[0041] The first external heat exchange section 210 is located outside the mounting chamber 101 and is adapted to exchange heat with external air to reduce the temperature of the first cooling medium. The first external heat exchange section 210 includes several heat exchange tubes 211 connected to a connecting pipe. These heat exchange tubes 211 are typically made of high thermal conductivity materials such as aluminum or copper tubes, and coolant flows through them. External air passing through the heat exchange tubes 211 carries away the heat from the coolant, thereby reducing the temperature of the coolant passing through the first external heat exchange section 210. Specifically, all the heat exchange tubes 211 extend in the Y-axis direction, and their arrangement direction is perpendicular to their extension direction, allowing them to be arranged side-by-side. Heat dissipation fins are provided on these heat exchange tubes 211. These fins contact the heat exchange tubes 211 for heat transfer, and external airflow flows through the fins, increasing the heat exchange area and improving the heat exchange efficiency of the heat exchange tubes 211.

[0042] The connecting pipeline includes a supply pipeline and a return pipeline, forming a complete coolant circulation loop. Typically, auxiliary equipment such as a circulation pump, storage tank, and filter are installed on the return pipeline to ensure stable coolant circulation and system reliability. The coolant flows out of the first external heat exchange section 210 at a lower temperature, enters the device's heat dissipation section to absorb heat, and then returns to the first external heat exchange section 210 through the connecting pipeline for further cooling, completing a full heat transfer cycle.

[0043] Reference Figure 1 and Figure 2 The second heat dissipation system includes a chamber heat dissipation section 310, a second external heat dissipation section 320, and a turbulence fan 330.

[0044] The chamber heat dissipation part 310 and the second external heat exchange part 320 are in communication with each other to circulate the second cooling medium, and the chamber heat dissipation part 310 is located in the mounting chamber 101. The second external heat exchange part 320 is located outside the mounting chamber 101 and is adapted to exchange heat with external air to reduce the temperature of the second cooling medium. In the embodiment, the second heat dissipation system includes a plurality of heat pipes 321 with phase change heat exchange capacity, and the second cooling medium is a phase change cooling medium circulating in the heat pipes 321; the heat pipes 321 penetrate the cavity wall of the mounting chamber 101, the chamber heat dissipation part 310 corresponds to the evaporation section 322 of the heat pipes 321, and the second external heat exchange part 320 corresponds to the condensation section 323 of the heat pipes 321. Specifically, all the heat pipes 321 in the second heat dissipation system are arranged along the Y-axis direction, the evaporation section 322 of which extends along the Z-axis direction, and the condensation section 323 is located outside the mounting chamber 101 and extends in a direction adjusted according to the specific shape of the heat exchange air duct 400. The evaporation section 322 and the condensation section 323 of the heat pipe 321 can have a bending section connecting the two, so that the condensation section 323 is in a bent state relative to the evaporation section 322. The condensation section 323 of the heat pipe 321 is provided with a heat dissipation fin, which is in contact with the condensation section 323 of the heat pipe 321 for heat exchange, and the external air flow passes through the heat dissipation fin, thereby increasing the heat exchange area of the condensation section 323 of the heat pipe 321 to improve the heat exchange efficiency.

[0045] A turbulence fan 330 is arranged near the chamber heat dissipation part 310, and the turbulence fan 330 is used to drive the air in the mounting chamber 101 to pass through the chamber heat dissipation part 310. Referring to Figure 2 , the turbulence fan 330 is preferably arranged at the side of the evaporation section 322 of the heat pipe 321, that is, the air supply direction of the turbulence fan 330 is the X-axis direction, which can make the air pass through the chamber heat dissipation part 310 and be cooled. When the hot air flows through the evaporation section 322 of the heat pipe 321 under the drive of the turbulence fan 330, the heat is absorbed by the phase change cooling medium, and the air temperature is reduced to continue circulating to provide continuous cooling effect for the electronic components.

[0046] Referring to Figure 1 and Figure 2, the heat exchange air duct 400 is provided outside the installation chamber 101 and is provided with an air inlet and an air outlet 420. Specifically, the heat exchange air duct 400 is arranged at the top of the cabinet 100 and is formed by two plate-shaped metal members arranged opposite along the Y-axis direction. The area between the two plate-shaped metal members forms the main body of the heat exchange air duct 400, and the part between the corresponding edges of the two metal members forms the air inlet and the air outlet 420 of the heat exchange air duct 400. Due to the structure of the heat exchange air duct 400, the heat exchange air duct 400 includes two air inlets and one air outlet 420. The two air inlets are a first air inlet 411 and a second air inlet 412, respectively. The first air inlet 411 is arranged obliquely relative to the horizontal plane to allow air to enter from the side of the cabinet 100 and make the heat exchange air duct 400 discharge air upward from the top. The second air inlet 412 is also arranged obliquely relative to the horizontal plane to allow air to enter from the side of the cabinet 100 and make the heat exchange air duct 400 discharge air upward from the top. The air outlet 420 of the heat exchange air duct 400 is provided with one air outlet and the air outlet direction is upward along the Z-axis direction. The first air inlet 411 and the second air inlet 412 are arranged side by side along the horizontal first direction, and the air inlet directions of the two are opposite. In this embodiment, the horizontal first direction is the X-axis direction, and the air inlet directions of the first air inlet 411 and the second air inlet 412 are respectively leftward along the X-axis direction and rightward along the X-axis direction. It should be understood that the air inlet direction referred to herein refers to the direction perpendicular to the plane defined by the air inlet of the heat exchange air duct 400, rather than the direction of air entering the air inlet. Since air can enter the air inlet from various positions, the direction of air entering is not always perpendicular to the plane defined by the air inlet.

[0047] In this embodiment, the oblique arrangement of the first air inlet 411 and the second air inlet 412 is achieved by the shape of the two plate-shaped metal members that form the heat exchange air duct 400. The shape of the two plate-shaped metal members on the projection plane perpendicular to the Y-axis direction is a reverse triangular shape, so the two waist edges thereof constitute the two air inlets, and the bottom edge thereof constitutes the air outlet 420. The first air inlet 411 and the second air inlet 412 are arranged in a "V" shape on the projection plane perpendicular to the Y-axis direction to increase the air inlet area of the heat exchange air duct 400.

[0048] A heat exchange fan positioning plate 510 is arranged at the position of the air outlet 420 of the heat exchange air duct 400. The heat exchange fan positioning plate 510 can be a large metal member and can cover the air outlet 420 of the heat exchange air duct 400. The heat exchange fan positioning plate 510 can be provided with heat exchange fan mounting holes 511 that are adapted to the size of the heat exchange fan 500. The heat exchange fan 500 is adapted to drive air in the heat exchange air duct 400 to flow in the air flow direction. The number of heat exchange fans 500 can be multiple, and two heat exchange fans 500 are provided in this embodiment. When the heat exchange fan 500 is working, it drives air to enter the heat exchange air duct 400 from the air inlets of the heat exchange air duct 400 and to be discharged upward from the air outlet 420.

[0049] The direction from the air inlet to the air outlet 420 is defined as the airflow direction; on at least one projection plane perpendicular to the airflow direction, at least a portion of the projection of the first external heat exchanger 210 corresponding to the same air inlet and at least a portion of the projection of the second external heat exchanger 320 do not overlap.

[0050] Reference Figure 1 and Figure 2 At least a portion of the first external heat exchange section 210 in the first heat dissipation system and at least a portion of the second external heat exchange section 320 in the second heat dissipation system may be arranged at the first air inlet 411 and / or the second air inlet 412. In this embodiment, all heat exchange tubes 211 in the first external heat exchange section 210 are divided into two parts. One part is arranged at the position of the first air inlet 411 and completely covers the air intake area of ​​the first air inlet 411. The other part is arranged on the upper side of the second air inlet 412 and covers approximately half of the air intake area of ​​the first air inlet 411. The second external heat exchange section 320 is arranged in the lower area of ​​the second air inlet 412, and the second external heat exchange section 320 cooperates with the heat exchange tubes 211 arranged in the first external heat exchange section 210 at the second air inlet 412 to jointly cover the air intake area of ​​the second air inlet 412. With this configuration, the portion of the first external heat exchange section 210 corresponding to the second air inlet 412 and the entirety of the second external heat exchange section 320 do not overlap on the projection plane perpendicular to the air inlet direction of the second air inlet 412.

[0051] In this embodiment, the airflow direction refers to the direction from the air inlet to the air outlet 420. Since there are two air inlets in this embodiment, each inlet can be considered to have two airflow directions. Furthermore, the airflow direction is not a straight line; it is determined by the airflow path defined by the heat exchange duct 400, but the air inlet direction of the heat exchange duct 400 can be considered part of the airflow direction. There can be multiple non-parallel projection surfaces perpendicular to the airflow direction, but at least one of these projection surfaces—in this embodiment, a projection surface perpendicular to the air inlet direction of the second air inlet 412—corresponds to at least a portion of the projections of the first external heat exchange portion 210 and the second external heat exchange portion 320 of the same air inlet 412, which do not overlap. In this embodiment, the projections of the first external heat exchanger 210 and the second external heat exchanger 320 located at the second air inlet 412 do not overlap, that is, they are arranged side by side. However, in other embodiments, some projections of the first external heat exchanger 210 and the second external heat exchanger 320 located at the second air inlet 412 may overlap, which means that some projections do not overlap.

[0052] In addition, in other embodiments, the second external heat exchange portion 320 can also be arranged at the position of the first air inlet 411, that is, the second external heat exchange portion 320 in the second heat dissipation system is divided into two parts, which are arranged at the first air inlet 411 and the second air inlet 412 respectively. At this time, the heat exchange pipe 211 in the first external heat exchange portion 210 can be adaptively adjusted according to the structure.

[0053] Further, with reference to Figure 2 , in the second heat dissipation system, the chamber heat dissipation portion 310 is located at the middle region of the cabinet 100 in the first direction; the heat exchange air duct 400, the first external heat exchange portion 210 and the second external heat exchange portion 320 are located at the top of the cabinet 100, and in the heat exchange air duct 400, the bottoms of the first air inlet 411 and the second air inlet 412 correspond to the position of the chamber heat dissipation portion 310, so as to make the second external heat exchange portion 320 communicate with the chamber heat dissipation portion 310. Specifically, the chamber heat dissipation portion 310 corresponds to the evaporation section 322 of the heat pipe 321 used in the second heat dissipation system, so that the chamber heat dissipation portion 310 and the second external heat exchange portion 320 are actually directly communicated through the body of the heat pipe 321. By arranging the chamber heat dissipation portion 310 at the middle region of the cabinet 100 in the X-axis direction, the first external heat exchange portion 210 and the second external heat exchange portion 320 are both located at the top of the cabinet 100 and form a "V" shape structure, the bottoms of the first air inlet 411 and the second air inlet 412 can also be arranged at the middle position of the cabinet 100 in the X-axis direction, so that the bottoms of the first external heat exchange portion 210 and the second external heat exchange portion 320 are also located at the middle position of the cabinet 100 in the X-axis direction. On this basis, by arranging the chamber heat dissipation portion 310 at the middle position of the cabinet 100 in the X-axis direction, which just corresponds to the bottom position of the first external heat exchange portion 210 and the second external heat exchange portion 320 at the top of the cabinet 100, the length of the heat pipe 321 used to form the chamber heat dissipation portion 310 and the second external heat exchange portion 320 can be shortened, so as to improve the phase change heat exchange efficiency. Moreover, in the present embodiment, the position of the turbulence fan 330 is arranged at the middle position of the cabinet 100 together with the chamber heat dissipation portion 310, the turbulence fan 330 can take in air from the right side of the X-axis direction and take out air from the left side of the X-axis direction, so as to form a smooth air cooling circulation in the installation chamber 101 inside the cabinet 100.

[0054] In addition, corresponding to the same air inlet, the first external heat exchange part 210 is closer to the heat exchange fan 500 than the second external heat exchange part 320, and the first external heat exchange part 210 adopts corrugated heat dissipation fins 212, and the second external heat exchange part 320 adopts straight heat dissipation fins 324, so as to balance the air flow passing through the first external heat exchange part 210 and the second external heat exchange part 320. Specifically, the corresponding to the same air inlet in the embodiment refers to the second air inlet 412. The part of the first external heat exchange part 210 and the entire second external heat exchange part 320 arranged corresponding to the second air inlet 412 are defined as the liquid cooling heat exchange part for convenience of description. The liquid cooling heat exchange part is located at a higher position than the second external heat exchange part 320, and thus is closer to the heat exchange fan 500 arranged at the top. This will cause the air flow passing through the liquid cooling heat exchange part and the heat dissipation fins on the second external heat exchange part 320 to be inconsistent, and more air will pass through the position of the liquid cooling heat exchange part, resulting in a decrease in the heat exchange efficiency of the second external heat exchange part 320.

[0055] Specifically, referring to FIG. 5 and FIG. 6, FIG. 5 shows the air speed in the case where only the first external heat exchange part 210 is arranged at the second air inlet 412. In this structure, the two first external heat exchange parts 210 on both sides along the X-axis direction are arranged symmetrically, and under the action of the two heat exchange fans 500, the air flow is approximately balanced. Although the air flow at the position far away from the heat exchange fan 500 is still less than that at the position close to the heat exchange fan 500. FIG. 6 shows the case where the first external heat exchange part 210 and the second external heat exchange part 320 are arranged at the second air inlet 412. It can be seen that, due to the fact that the first external heat exchange part 210 exchanges heat through the liquid cooling pipe part, and the second external heat exchange part 320 exchanges heat through the heat pipe 321, the second external heat exchange part 320 has a large stall condition when the air flow passes through it, indicating that the air flow has a large air resistance at the second external heat exchange part 320.

[0056] Therefore, in the embodiment, the corrugated heat dissipation fins 212 are adopted on the liquid cooling heat exchange part, and specifically, refer to FIG. 7 and FIG. 8. Figure 3 The straight heat dissipation fins 324 are adopted on the second external heat exchange part 320, and specifically, refer to FIG. 9 and FIG. 10. Figure 4 The corrugated heat dissipation fins 212 form a corrugated air passing path in the air passing direction, and the air flow will hit the fluctuating fin wall in the process of passing through the corrugated heat dissipation fins 212, thereby increasing the air resistance. The straight heat dissipation fins 324 do not have any obstruction in the air passing direction, and thus have a small air resistance. Through the cooperation of the two, the problem of unbalanced air flow of the liquid cooling heat exchange part and the second external heat exchange part 320 can be preliminarily improved.

[0057] Further, referring toFigure 3 In addition, the corrugated heat dissipation fins 212 are provided with a plurality of protruding ribs 213 arranged at intervals along the air flow direction, and the protruding ribs 213 extend perpendicularly to the air flow direction. Specifically, the fin walls of the corrugated heat dissipation fins 212 have a certain length of extension perpendicular to the air flow direction, that is, the heat dissipation fins have a certain fin height to increase the contact area with the air flow. The protruding ribs 213 are arranged on the fin walls of the corrugated heat dissipation fins 212 and extend along the fin height direction. The protruding ribs 213 can be arranged at intervals according to a predetermined interval. For example, if a larger air resistance is required, the interval of the protruding ribs 213 can be reduced, and the arrangement density of the protruding ribs 213 can be increased. If a smaller air resistance is required, the interval of the protruding ribs 213 can be increased, and the arrangement density of the protruding ribs 213 can be reduced. The length of extension of the protruding ribs 213 can be set to be consistent with the height of the fin walls, so that the protruding ribs 213 form an obstruction on the air flow path. In addition, the protruding ribs 213 can be arranged on both sides of the fin walls forming the air flow path, and the protruding ribs 213 arranged on the opposite fin walls can be arranged staggered along the air flow direction to reduce the impact on the air flow speed and flow rate.

[0058] In addition, for the first external heat exchange part 210 located at the first air inlet 411, a flat heat dissipation fin 324 can be used, or a corrugated heat dissipation fin 212 can be used, as long as the air resistance of the external heat exchange parts of the first air inlet 411 and the second air inlet 412 is approximately balanced. The arrangement density of the heat dissipation fins on the first external heat exchange part 210 located at the first air inlet 411 can be further adjusted. For example, the arrangement density of the heat dissipation fins closer to the heat exchange fan 500 is greater, and the arrangement density of the heat dissipation fins farther away from the heat exchange fan 500 is smaller. In this way, the air flow at different positions of the first external heat exchange part 210 located at the first air inlet 411 can also be balanced.

[0059] The cabinet heat dissipation structure of the present embodiment can be applied to a cabinet 100 provided with a closed installation chamber 101. The device heat dissipation part in the first heat dissipation system of the cabinet heat dissipation structure can contact the electronic components to efficiently dissipate heat from the electronic components. The chamber heat dissipation part 310 in the second heat dissipation system can form air circulation in the installation chamber 101 through the turbulence fan 330. The air temperature decreases after passing through the chamber heat dissipation part 310 and is transported to the position of the electronic components, and then the air temperature increases and is transported to the position of the chamber heat dissipation part 310 for further cooling. Through the cooperation of the two different heat dissipation modes of the first heat dissipation system and the second heat dissipation system in the installation chamber 101, the electronic components in the cabinet 100 provided with the closed installation chamber 101 can be cooled at a high cost performance and high reliability.

[0060] On this basis, the first heat dissipation system and the second heat dissipation system are further provided with a first external heat exchange part 210 and a second external heat exchange part 320 outside the installation chamber 101, and the two external heat exchange parts exchange heat with air outside at a low temperature, so as to reduce the temperature of the first cooling medium and the second cooling medium. Wherein, the heat exchange air duct 400 is arranged outside the installation chamber 101, and the first external heat exchange part 210 and the second external heat exchange part 320 are arranged at at least one air inlet position of the heat exchange air duct 400, and the key is that the projections of the first external heat exchange part 210 and the second external heat exchange part 320 do not overlap each other in the projection plane perpendicular to the air flow direction. Through the layout, the two external heat exchange parts share the same heat exchange air duct 400, but because the projections of the two external heat exchange parts do not overlap in the air flow cross section, the external low-temperature air can flow through the heat exchange surfaces of the two external heat exchange parts independently and simultaneously, avoiding the problem of heat superposition in the traditional series ventilation mode. Compared with the scheme of arranging two independent heat exchange air ducts 400 to independently exchange heat for the two external heat exchange parts, because the two external heat exchange parts only use one heat exchange air duct 400 and share the heat exchange fan 500, the whole cabinet heat dissipation structure is more compact, and at the same time, the heat exchange air duct 400 can maintain a larger air volume, so as to provide a larger effective air inlet and heat exchange area, and ensure the overall heat dissipation capacity of the first heat dissipation system and the second heat dissipation system.

[0061] In addition, among the two external heat exchange parts corresponding to the same air inlet, the first external heat exchange part 210 is arranged closer to the heat exchange fan 500, which can provide higher heat exchange efficiency for the first heat dissipation system which bears the main heat generating complex. However, this layout will cause the air volume of the second external heat exchange part 320 to be reduced due to the first external heat exchange part 210 being closer to the heat exchange fan 500 than the second external heat exchange part 320, thereby affecting the heat exchange efficiency of the second heat dissipation system. Therefore, the first external heat exchange part 210 is specially arranged to adopt corrugated heat dissipation fins 212, and the second external heat exchange part 320 adopts straight heat dissipation fins 324. Because the air flow path of the corrugated heat dissipation fins 212 is more tortuous than that of the straight heat dissipation fins 324, the air flow resistance when the air flow passes through the corrugated heat dissipation fins 212 is greater, thereby forcing the air flow to pass through the first external heat exchange part 210 and the second external heat exchange part 320 more evenly when entering the heat exchange air duct 400 from the corresponding same air inlet, realizing the optimized matching of air volume and air resistance between the two heat dissipation systems, effectively avoiding the decrease of heat exchange efficiency of the second heat dissipation system due to insufficient air volume, and ensuring the uniformity and reliability of the overall heat dissipation of the cabinet 100, and finally realizing the maximization of the overall heat dissipation efficiency in a compact structure space.

[0062] The technical means is not simply using two existing types of heat dissipation fins, and the focus is to use the two types of heat dissipation fins together to solve the problem of inconsistent wind flow on the two external heat exchange parts caused by the specific layout of the external heat exchange part and the heat exchanger fan 500 in the scheme. The scheme does not use conventional means such as increasing fan power, setting flow guide baffles, or expanding the volume of the air duct, but designs two types of heat dissipation fins with different resistance characteristics, and uses the reverse offset of the two to achieve self-balancing of the air volume. Although the two types of heat dissipation fins are mature technologies, the complete technical means of the scheme is to use them together in a specific air duct layout to achieve air volume balance of the two external heat exchange parts at the same air inlet. It is easy to understand that this combination is the key technical means adopted by the scheme, and the use of the two types of heat dissipation fins cannot be considered separately. Moreover, the selection of the type of heat dissipation fin in the scheme is not arbitrary. The corrugated heat dissipation fin 212 has a relatively tortuous air flow path, but the longer air flow path allows the air flow to contact the fin wall of the heat dissipation fin for a longer time, and the fin wall area of the corrugated heat dissipation fin 212 is also larger, thereby improving the unit efficiency of air flow heat exchange, which ensures that the heat exchange efficiency of the second heat dissipation system will not be greatly affected by the increase in air resistance. Compared with other fin types that can increase air resistance, such as louvered heat dissipation fins or sawtooth heat dissipation fins, a better balance between increasing air resistance and ensuring heat exchange efficiency can be achieved.

[0063] The top-out air liquid-cooled converter related to the embodiment includes a cabinet 100 and uses the cabinet heat dissipation structure described above. The cabinet 100 can simultaneously perform double heat dissipation through the first heat dissipation system and the second heat dissipation system due to the use of the cabinet heat dissipation structure, realizes efficient heat dissipation of electronic components in the closed installation chamber 101, and has the advantages of high cost performance and high reliability.

[0064] In at least one embodiment, by providing protrusions 213 on the fin wall of the corrugated heat dissipation fin 212, the structure of the protrusions 213 protruding from the fin wall can be used to destroy the laminar flow formed near the fin wall when the air flow passes through the heat dissipation fin, induce micro-scale separation and periodic vortex, and make the cold air at the center of the air duct exchange energy with the fin wall more frequently, thereby significantly strengthening the convective heat exchange effect of the fin surface. In the specific air duct layout of the scheme, these protrusions 213 can further regulate the air resistance of the corrugated heat dissipation fin 212 on the one hand, and guide the air flow to the second external heat exchange part 320 at the far end for balanced distribution; on the other hand, this forced flow mechanism can improve the heat exchange efficiency per unit area, so that the first external heat exchange part 210 can still carry away the heat of the power components with high heat exchange efficiency even in the case of high air resistance and limited local flow rate.

[0065] In at least one embodiment, the heat exchange fan 500 is arranged at the air outlet 420 of the heat exchange air duct 400, so that the suction effect of the fan directly acts on the outlet area of the heat exchange air duct 400. This arrangement shortens the hot air exhaust path, reduces the air duct bending and flow resistance, and compared with the layout in which the fan is located at the middle or air inlet side of the air duct, can improve the air flow efficiency and reduce the power consumption of the fan due to wind pressure loss.

[0066] In at least one embodiment, the first air inlet 411 of the heat exchange air duct 400 is arranged inclined relative to the horizontal plane, so that external air enters from the side of the cabinet 100 along the inclined direction and is vertically exhausted through the top. This air duct layout conforms to the natural convection trend and can maximize the heat exchange area of the external heat exchange part, so as to achieve efficient heat dissipation in the limited space at the top of the cabinet 100.

[0067] In at least one embodiment, a second air inlet 412 is additionally arranged on the basis of the first air inlet 411, both of which are arranged side by side in the horizontal direction and have opposite air inlet directions, and both air inlets are arranged with the first external heat exchange part 210 and the second external heat exchange part 320. This symmetrical two-way air inlet can make external air flow into the cabinet 100 from both sides synchronously, which can improve the air inlet efficiency, increase the heat exchange area, balance the pressure distribution in the heat exchange air duct 400, and reduce the air flow deflection or uneven wind speed on the surface of the heat exchanger caused by one-sided air inlet. By arranging the external heat exchange part at both the first air inlet 411 and the second air inlet 412, compared with the scheme of arranging only the second external heat exchange part 320 at the single air inlet, the problem of uneven air temperature rise after air inlet at the two air inlets of the heat exchange air duct 400 caused by the inconsistent heat exchange efficiency of the second external heat exchange part 320 and the first external heat exchange part 210 can be improved.

[0068] In at least one embodiment, only the first external heat exchange part 210 is arranged at the second air inlet 412, and the first external heat exchange part 210 and the second external heat exchange part 320 are arranged at the first air inlet 411, so that the second external heat exchange part 320 can be concentrated at one air inlet without being inclined to two air inlets respectively, and the arrangement of the second external heat exchange part 320 is more simple and convenient.

[0069] In at least one embodiment, the chamber heat dissipation part 310 is arranged at the middle region of the first direction of the cabinet 100, which can also arrange the turbulence fan 330 at the middle region of the mounting chamber 101. The air inlet and air outlet areas of the turbulence fan 330 have sufficient space for air flow, thereby improving the air cooling heat dissipation of the electronic components in the mounting chamber 101. In addition, the bottoms of the two air inlets of the heat exchange air duct 400 are also arranged at the middle region, which facilitates the communication between the chamber heat dissipation part 310 and the second external heat exchange part 320.

[0070] In at least one embodiment, the first cooling medium is a liquid cooling medium that does not change phase, and the device heat dissipation part and the first external heat exchange part 210 in the first heat dissipation system are connected by a communication pipe and circulate the first cooling medium. The liquid cooling medium can better take away the heat of the electronic components by its high specific heat capacity compared to the conventional air cooling method.

[0071] In at least one embodiment, the second heat dissipation system uses a heat pipe 321 with a built-in phase change cooling medium, and uses the phase change cycle of the working medium to transfer heat, i.e., the working medium absorbs heat and vaporizes in the evaporation section 322, and releases heat and liquefies in the condensation section 323. This heat dissipation method can achieve large heat flux density dissipation under a small temperature difference, and significantly improves the heat exchange efficiency of the chamber heat dissipation part 310 compared to the cavity heat dissipation method relying only on air natural convection or single-phase forced convection.

[0072] The above description and embodiment description are used to explain the scope of protection of the present application, but do not constitute a limitation on the scope of protection of the present application. Through the inspiration of the present application or the above-mentioned embodiments, those skilled in the art can obtain the modification, equivalent replacement or other improvement of the embodiments of the present application or one part of the technical features by combining the common knowledge, the ordinary technical knowledge in the art and / or the prior art, through logical analysis, reasoning or limited experiments, which should be included in the scope of protection of the present application.

Claims

1. A cabinet heat dissipation structure, the cabinet (100) is provided with a closed installation chamber (101), the installation chamber (101) is used for installing electronic components, characterized in that, The application relates to a heat exchange system for electronic equipment, comprising: a first heat dissipation system, which comprises a device heat dissipation part and a first external heat exchange part (210) connected to each other to circulate a first cooling medium; the device heat dissipation part is located in the installation chamber (101) and is adapted to contact at least part of the electronic components to exchange heat; the first external heat exchange part (210) is located outside the installation chamber (101) and is adapted to contact external air to exchange heat and reduce the temperature of the first cooling medium; a second heat dissipation system, which comprises a chamber heat dissipation part (310) and a second external heat exchange part (320) connected to each other to circulate a second cooling medium, and at least one turbulence fan (330); the chamber heat dissipation part (310) is located in the installation chamber (101), and the turbulence fan (330) is used to drive air in the installation chamber (101) to pass through the chamber heat dissipation part (310); the second external heat exchange part (320) is located outside the installation chamber (101) and is adapted to contact external air to exchange heat and reduce the temperature of the second cooling medium; a heat exchange air duct (400) is arranged outside the installation chamber (101) and is provided with an air inlet and an air outlet (420); the direction in which the air inlet points to the air outlet (420) is defined as the air passing direction; in at least one projection plane perpendicular to the air passing direction, at least part of the projection of the first external heat exchange part (210) corresponding to the same air inlet and at least part of the projection of the second external heat exchange part (320) do not overlap each other; and a heat exchange fan (500) adapted to drive air in the heat exchange air duct (400) to flow along the air passing direction; corresponding to the same air inlet, the first external heat exchange part (210) is closer to the heat exchange fan (500) than the second external heat exchange part (320), and the first external heat exchange part (210) adopts corrugated heat dissipation fins (212), and the second external heat exchange part (320) adopts straight heat dissipation fins (324) to balance the air flow passing through the first external heat exchange part (210) and the second external heat exchange part (320).

2. The cabinet heat dissipation structure of claim 1, wherein, The fin wall of the corrugated heat dissipation fin (212) is provided with a plurality of convex ribs (213) arranged at intervals along the air passing direction, and the convex ribs (213) extend perpendicularly to the air passing direction.

3. The cabinet heat dissipation structure of claim 1, wherein, The heat exchange fan (500) is located at the air outlet (420) of the heat exchange air duct (400).

4. The cabinet heat dissipation structure of claim 1, wherein, The heat exchange air duct (400) comprises a first air inlet (411), the first air inlet (411) is arranged to be inclined to the horizontal plane to inhale air from the side of the cabinet (100) and exhale air upward from the top, and at least part of the first external heat exchange part (210) and the second external heat exchange part (320) are arranged.

5. The cabinet heat dissipation structure of claim 4, wherein, The heat exchange air duct (400) further comprises a second air inlet (412) which is arranged obliquely to the horizontal plane and is arranged side by side with the first air inlet (411) along the horizontal first direction, and the air inlet directions of the two are opposite; the second air inlet (412) is arranged side by side with at least part of the first external heat exchange part (210) and the second external heat exchange part (320) perpendicularly to the air inlet direction.

6. The cabinet heat dissipation structure of claim 4, wherein, The heat exchange air duct (400) further comprises a second air inlet (412) which is arranged obliquely to the horizontal plane and is arranged side by side with the first air inlet (411) along the horizontal first direction, and the air inlet directions of the two are opposite; the second air inlet (412) is arranged side by side with at least part of the first external heat exchange part (210) and the second external heat exchange part (320) perpendicularly to the air inlet direction.

7. The cabinet heat dissipation structure according to claim 5 or 6, characterized in that, In the second heat dissipation system, the chamber heat dissipation part (310) is located in the middle region of the cabinet (100) in the first direction; the heat exchange air duct (400), the first external heat exchange part (210) and the second external heat exchange part (320) are located at the top of the cabinet (100), and in the heat exchange air duct (400), the bottoms of the first air inlet (411) and the second air inlet (412) correspond to the position of the chamber heat dissipation part (310), so that the second external heat exchange part (320) communicates with the chamber heat dissipation part (310).

8. The cabinet heat dissipation structure of claim 1, wherein, The first heat dissipation system further comprises a communication pipeline, and the device heat dissipation part and the first external heat exchange part (210) circulate the first cooling medium through the communication pipeline; the first cooling medium is a liquid cooling medium which does not undergo phase change.

9. The cabinet heat dissipation structure of claim 1, wherein, The second heat dissipation system comprises a plurality of heat pipes (321) having phase change heat exchange capacity, and the second cooling medium is a phase change cooling medium which circulates in the heat pipes (321) in phase change; the heat pipes (321) penetrate the cavity wall of the installation cavity (101), the chamber heat dissipation part (310) corresponds to the evaporation section (322) of the heat pipes (321), and the second external heat exchange part (320) corresponds to the condensation section (323) of the heat pipes (321).

10. An ejection air liquid-cooled converter comprising a cabinet (100) provided with a closed mounting chamber (101) for mounting electronic components, at least part of which constitutes a power assembly for conversion, characterized in that, The power assembly comprises at least one electronic component, and the cabinet heat dissipation structure is arranged on the cabinet to dissipate heat of the electronic component, and the heat exchange fan in the cabinet heat dissipation structure is arranged at the top of the cabinet to blow air upward.

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