A liquid cooling heat exchanger, a liquid cooling heat exchange assembly, and a current transformer
Patent Information
- Application Number
- CN202522092336.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-28
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-09-28
AI Technical Summary
然而，由于液冷换热器的位置高于液冷板，液冷管路中的空气会在液冷换热器中聚集，而液冷换热器又距离冷源系统较远，导致液冷换热器无法获得足够的动力将气体排出，进而导致液冷换热器的散热性能和运行稳定性下降
[0017]在液冷系统运行过程中，液冷介质中可能混入空气，或因温度变化析出溶解气体。由于气体密度小于液体，在重力场中会自然上浮。在常规液冷换热器中，若换热流道位于系统高位，且其顶部未设置高于流道本身的排气通道，则气体容易滞留在换热流道的最高点，形成气囊。气囊占据流道截面，减少有效流通面积，降低局部换热效率，严重时可导致流道局部干烧，影响系统稳定性。尤其在远离泵源的高位换热器中，循环压差较小，流速较低，气体更难以被液体携带排出，问题更为突出。
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Figure CN224875283U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of liquid-cooled heat exchanger technology, specifically to a liquid-cooled heat exchanger, a liquid-cooled heat exchange component, and a converter. Background Technology
[0002] In electrical equipment, such as energy storage converter modules, liquid cooling can efficiently remove the heat generated by electronic components, ensuring the entire electrical system operates smoothly and stably. This liquid cooling method requires an external cold source system to circulate the liquid cooling medium, while components like liquid cooling plates are installed within the electrical equipment to dissipate heat from the electronic components. However, conventional liquid cooling systems, when using liquid cooling plates, typically only dissipate heat from the electronic components directly in contact with the plate. The heat generated by these components diffuses throughout the entire internal space of the electrical equipment, resulting in less than ideal overall heat dissipation. To address this, existing technologies incorporate a fan and a liquid-cooled heat exchanger to form an air-liquid heat exchange assembly. The liquid-cooled heat exchanger, like the liquid cooling plate, is equipped with liquid cooling pipes to circulate the liquid cooling medium. The heat exchanger also features heat exchange fins or perforated heat exchange sections. A fan directs airflow into the heat exchange section of the liquid-cooled heat exchanger, converting hot air into cold air and circulating it within the electrical equipment's casing.
[0003] However, in electrical equipment with liquid-cooled plates and liquid-cooled heat exchangers, the gas in the liquid-cooled piping can affect the heat dissipation performance and operational stability of the liquid-cooling system, especially during initial startup when liquid cooling medium is injected or after prolonged periods of inactivity. Current technology typically relies on the circulating power of the cold source system to carry and expel the gas from the piping. However, because the liquid-cooled heat exchanger is positioned higher than the liquid-cooled plate, air in the liquid-cooled piping tends to accumulate in the heat exchanger. Furthermore, the heat exchanger's distance from the cold source system prevents it from receiving sufficient power to expel the gas, thus reducing its heat dissipation performance and operational stability. Utility Model Content
[0004] The purpose of this utility model is to overcome the above-mentioned defects or problems in the background art and provide a liquid-cooled heat exchanger, liquid-cooled heat exchange component, and converter, which can maintain good heat dissipation performance and operational stability under gas-containing conditions.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] Technical Solution 1: A liquid-cooled heat exchanger, comprising: a heat exchange section for contacting an external fluid to achieve heat exchange, and having multiple heat exchange channels arranged side-by-side in a vertical direction with the same length; each heat exchange channel has a first heat exchange end and a second heat exchange end at its two ends; a liquid inlet section having a liquid inlet channel, the bottom of which has an inlet suitable for receiving a liquid cooling medium, and is simultaneously connected to the first heat exchange end of each heat exchange channel; the inlet is not higher than the first heat exchange end of the highest heat exchange channel; and a liquid outlet section having an upwardly protruding and bent liquid outlet channel, the liquid outlet channel including a first liquid outlet section and a second liquid outlet section that are interconnected; the first liquid outlet section is simultaneously connected to the second heat exchange end of each heat exchange channel, the bottom of which has an outlet suitable for discharging a liquid cooling medium; the connection between the first liquid outlet section and the second liquid outlet section is the bend of the liquid outlet channel, and it is not lower than the second heat exchange end of the highest heat exchange channel.
[0007] Technical Solution 2 based on Technical Solution 1: The first liquid outlet section and the second liquid outlet section in the liquid outlet channel are arranged sequentially along the extension direction of each heat exchange channel, and the first liquid outlet section is closer to each heat exchange channel than the second liquid outlet section.
[0008] Technical Solution 3 based on Technical Solution 2: The first liquid outlet section and the second liquid outlet section in the liquid outlet channel are arranged sequentially perpendicular to the extension direction of each heat exchange channel.
[0009] Technical solution four, based on any one of technical solutions one to three: The liquid outlet section is hollow inside to form a liquid outlet chamber, and is divided into a first liquid outlet section and a second liquid outlet section by a partition extending upward from the bottom of the liquid outlet chamber; a liquid inlet is formed between the top of the partition and the top of the liquid outlet chamber; the liquid inlet is the connection point between the first liquid outlet section and the second liquid outlet section.
[0010] Technical solution five based on technical solution one: The heat exchange section includes a plurality of heat exchange flow channels; the heat exchange flow channels are provided inside the heat exchange flow channels, and the heat exchange flow channels are at least partially flat; the extension direction of the flat portion on the heat exchange flow channels is used to define the flow direction of the external fluid through the heat exchange section.
[0011] Technical solution six based on technical solution five: Each heat exchange channel plate is provided with a corresponding heat exchange channel, the heat exchange channel includes multiple heat exchange sub-channels, and each heat exchange sub-channel belonging to the same heat exchange channel is arranged side by side in the heat exchange channel plate along the flow direction of the external fluid through the heat exchange part.
[0012] Technical solution seven based on technical solution five: The heat exchange channel plate is long and flat, with its two ends in the length direction forming a first plate end and a second plate end, and the first plate end and the second plate end are respectively connected to the liquid inlet and the liquid outlet.
[0013] Technical solution eight, based on technical solution seven, further includes an auxiliary heat exchange plate located between adjacent heat exchange channel plates in the vertical direction. The auxiliary heat exchange plate includes a plurality of first heat exchange segments that extend in the same direction as the heat exchange channel plates, and a second heat exchange segment that connects the first heat exchange segments adjacent in the length direction of the heat exchange channel plates and extends in the vertical direction. The first heat exchange segment is closely attached to the heat exchange channel plate corresponding to its height position in the auxiliary heat exchange plate.
[0014] In addition, this utility model also provides technical solution nine: a liquid-cooled heat exchange component, which includes a liquid-cooled radiator and a fan, and further includes a liquid-cooled heat exchanger as described in any one of technical solutions one to eight; the liquid-cooled heat exchanger is connected to the liquid-cooled radiator to circulate liquid cooling medium; the fan is used to drive air fluid through the heat exchange section of the liquid-cooled heat exchanger.
[0015] In addition, this utility model also provides technical solution ten: a converter, which includes a plurality of power devices, and further includes the liquid-cooled heat exchange assembly described in technical solution nine; at least a portion of the power devices dissipate heat through the liquid-cooled radiator and / or liquid-cooled heat exchanger in the liquid-cooled heat exchange assembly.
[0016] As can be seen from the above description of this utility model, compared with the prior art, this utility model has the following beneficial effects:
[0017] During the operation of a liquid cooling system, air may mix into the cooling medium, or dissolved gases may precipitate due to temperature changes. Since gases are less dense than liquids, they will naturally float in a gravitational field. In conventional liquid-cooled heat exchangers, if the heat exchange channel is located at a high level in the system and its top is not equipped with an exhaust channel higher than the channel itself, gases can easily become trapped at the highest point of the heat exchange channel, forming air pockets. These air pockets occupy the channel cross-section, reducing the effective flow area and decreasing local heat exchange efficiency. In severe cases, this can lead to localized dry burning of the channel, affecting system stability. This problem is particularly pronounced in high-level heat exchangers far from the pump source, where the circulating pressure differential is smaller and the flow velocity is lower, making it even more difficult for the gas to be carried away by the liquid.
[0018] Technical solution one provides a liquid-cooled heat exchanger, which arranges multiple heat exchange channels in parallel along the vertical direction with the same length and connects them in parallel to the liquid inlet and liquid outlet. At the same time, only the liquid outlet side is provided with an upwardly protruding and bent liquid outlet channel, and the bend is higher than the second heat exchange end of the highest heat exchange channel. The liquid inlet is located at the bottom of the liquid inlet. In this way, through the parallel design and the synergistic cooperation of the single-sided high-point exhaust structure, a reliable exhaust path is provided for high-level gas while maintaining uniform flow distribution.
[0019] This design utilizes multiple heat exchange channels arranged vertically side-by-side with uniform lengths to ensure that each channel has the same geometric path and hydraulic resistance. Furthermore, the first heat exchange end of all heat exchange channels is simultaneously connected to the inlet channel, and the second heat exchange end is simultaneously connected to the first outlet section of the outlet channel. The inlet is located at the bottom of the inlet section and no higher than the first heat exchange end of the lowest heat exchange channel, forming a parallel structure for the liquid cooling medium flow path. This structure ensures a uniform liquid cooling medium flow rate in each channel under the same inlet and outlet pressure difference, preventing some channels from becoming gas stagnation areas due to excessively low flow velocities caused by flow rate differences. Moreover, the outlet channel includes an interconnected first and second outlet section, which bend and connect at a point higher than the second heat exchange end of the highest heat exchange channel. This bend becomes the highest geometric point within the entire heat exchanger. Since the second heat exchange end of all heat exchange channels is directly connected to the first liquid outlet section, and the first liquid outlet section is adjacent to this high point, when gas rises to its second heat exchange end (i.e., the outlet end) in any heat exchange channel due to buoyancy, it can continue to migrate upwards into the bend high point area of the liquid outlet channel. This high point is directly connected to the system outlet, and the gas can be smoothly discharged from the second liquid outlet section with the mainstream of the liquid cooling medium. In a typical installation scenario, the liquid-cooled heat exchanger is arranged vertically, with the liquid inlet at the bottom and the liquid outlet at the top, and the liquid cooling medium flows from bottom to top. As the gas rises with the liquid flow in the channel, it is driven by buoyancy to continuously migrate towards the top of the channel, eventually accumulating near the outlet end. At this time, the bend structure of the high point of the liquid outlet channel precisely covers this area, providing a clear channel for gas collection and discharge. Even in the initial stage of system startup or low-flow-rate conditions such as low-load operation, the gas can still enter the high point by buoyancy and be carried out in subsequent flow, without relying on high pump pressure or additional exhaust devices. Furthermore, under normal operating conditions, the pressure on the inlet side is relatively high, and the liquid cooling medium enters from a low position, making it difficult for gas to accumulate at the inlet end. Even if a small amount of gas enters the flow channel, it will migrate towards the outlet end due to buoyancy during flow. Therefore, setting a high point only on the outlet side is sufficient to cover the main gas accumulation area, which simplifies the structure and ensures effective venting. This solution effectively solves the problem in existing technologies where heat exchangers located at higher positions have difficulty venting gas due to their distance from the pump source, significantly improving the heat exchange reliability and operational stability of the heat exchanger under gas-containing conditions.
[0020] In technical solution two, the first and second liquid outlet sections in the liquid outlet channel are arranged sequentially along the extension direction of the heat exchange channel, with the first liquid outlet section being closer to the heat exchange section than the second liquid outlet section. This arrangement ensures that after the liquid cooling medium flows out of the heat exchange channel, it first enters the first liquid outlet section adjacent to the heat exchange section, accumulates, and then flows vertically upwards past the bend in the liquid outlet channel before entering the second liquid outlet section. This configuration ensures that the flow direction of the liquid cooling medium into the second liquid outlet section is consistent with the extension direction of the heat exchange channel, reducing the back pressure at the second heat exchange end of each heat exchange channel and further enhancing the flow uniformity under the parallel connection structure.
[0021] In technical solution three, the first and second outlet sections of the liquid outlet channel are arranged perpendicular to the extension direction of the heat exchange channel. This layout reduces the size of the heat exchanger along the length of the heat exchange channel. The smaller space occupied by the heat exchanger in this direction provides greater flexibility for the external piping connection of the heat exchanger and improves the applicability of the heat exchanger in different integrated environments.
[0022] In technical solution four, the liquid outlet section is constructed as a hollow liquid outlet chamber, which is divided into a first liquid outlet section and a second liquid outlet section by a baffle extending upward from the bottom of the chamber. A liquid inlet is formed between the top of the baffle and the top of the chamber, serving as the connection point between the two sections. This structure achieves flow channel separation through a single internal baffle, avoiding multi-tube welding or complex casting processes and potential leakage risks. Furthermore, compared to a U-shaped bend, it occupies less space in the width direction of the heat exchanger, making the entire liquid outlet section more compact and facilitating the miniaturization and integrated design of the entire liquid-cooled heat exchanger.
[0023] In technical solution five, the heat exchange channel plate serves as the basic unit of the heat exchange module. It contains internal heat exchange channels and is at least partially flat, with the extension direction of the flat portion defining the flow direction of external fluids (such as air). This design integrates the liquid-cooled channels within the flat plate, allowing the coolant to flow within the plate while external air sweeps laterally across its surface. The flat structure increases the contact area with air, and the defined extension direction ensures more uniform airflow distribution, reducing flow separation and dead zones, and improving heat exchange efficiency. The parallel arrangement of the heat exchange channel plates creates regular air channels between them. When an external fan drives airflow through these channels, a stable laminar or slightly disturbed flow field is formed, maximizing the contact efficiency between air and the heat exchange surface while controlling flow resistance on the air side.
[0024] In technical solution six, each heat exchange channel is subdivided into multiple heat exchange sub-channels arranged side-by-side along the external fluid flow direction. Dividing a single, wide channel into multiple narrow sub-channels increases the contact area between the liquid and the channel wall, thus increasing the internal surface heat exchange area, while maintaining the same total flow rate. Furthermore, the reduced channel size increases the average velocity of the liquid-cooled medium within the channel and enhances fluid turbulence. Higher velocities and stronger turbulence significantly reduce the thickness of the laminar boundary layer near the pipe wall, thereby substantially increasing the convective heat transfer coefficient from the liquid to the pipe wall. In addition, the internal stiffeners of the sub-channels also provide support, improving the structural strength of the flat heat exchange channel plates against internal fluid pressure.
[0025] In technical solution seven, the heat exchange channel plate has an overall elongated and flat shape, with its two ends connected to the liquid inlet and liquid outlet, respectively. The shape of the heat exchange channel plate ensures that the liquid-cooled heat exchanger has a large heat exchange area, and the flow stability of the liquid cooling medium in the internal heat exchange channel can be improved by reducing the bending structure, thus maintaining a balanced flow and pressure at all positions along the length of the heat exchange channel plate.
[0026] In technical solution eight, an auxiliary heat exchanger is added, located between adjacent heat exchange channel plates in the vertical direction. It consists of a first heat dissipation section extending along the channel plate's extension direction and a second heat dissipation section connecting the adjacent first heat dissipation sections in the vertical direction, with the first heat dissipation section closely attached to the corresponding height of the heat exchange channel plate. The auxiliary heat exchanger effectively increases the contact area between the entire heat exchange section and the air while maintaining the elongated and flat shape of the heat exchange channel plates, thereby reducing the impact on the flow velocity and stability of the liquid cooling medium in the heat exchange channel. Furthermore, by being in close contact with the heat exchange channel plates on both sides, when the temperature of one channel plate rises due to a higher local heat load, the heat can be conducted to the auxiliary heat exchanger through the attached first heat dissipation section and then laterally diffused to channel plates at other heights via the second heat dissipation section, achieving a redistribution of heat in the vertical direction. This design achieves the dual effects of enhanced thermal conductivity and expanded heat dissipation area without significantly increasing the volume. The first heat exchange section guides the heat from the heat exchange channel plates to the second heat exchange section, which in turn increases the heat exchange area and transfers heat. Without the first heat exchange section, the contact area between the second heat exchange section and the heat exchange channel plates would be too small to achieve the desired effect.
[0027] Technical solution nine provides a liquid-cooled heat exchange component that integrates the aforementioned liquid-cooled heat exchanger with a liquid-cooled radiator (such as a liquid cooling plate) for directly cooling power devices. A fan can drive air to flow through the liquid-cooled heat exchanger in a preset direction. The temperature of the air flowing through the liquid-cooled heat exchanger decreases, thereby cooling the circulating air inside the device housing through the liquid-cooled heat exchanger, reducing the overall ambient temperature, and further improving the heat dissipation efficiency of the liquid-cooled radiator in conjunction with the heat exchanger.
[0028] Technical solution ten provides a converter that applies the aforementioned liquid-cooled heat exchange components to a system containing multiple power devices, wherein the power devices can dissipate heat through liquid-cooled radiators and / or liquid-cooled heat exchangers. This structure achieves efficient direct liquid cooling of high heat flux density power devices, while actively cooling the internal air of the equipment through vertically mounted liquid-cooled heat exchangers, preventing heat accumulation in the enclosed space. Therefore, it not only ensures the temperature stability of the power devices under high load conditions but also improves the overall converter's operational stability and long-term service life under complex conditions such as gas-filled environments or frequent start-stop cycles. Attached Figure Description
[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0030] Figure 1 This is a schematic diagram of the liquid-cooled heat exchange assembly according to an embodiment of the present invention;
[0031] Figure 2 for Figure 1 A three-dimensional structural diagram of a liquid-cooled heat exchanger;
[0032] Figure 3 for Figure 2 Schematic diagram of the internal cross-section of a liquid-cooled heat exchanger;
[0033] Figure 4 for Figure 3 An enlarged schematic diagram of part A in the middle.
[0034] Explanation of key figure labels:
[0035] Liquid-cooled heat exchanger 100;
[0036] Heat exchange section 110; heat exchange channel 111; first heat exchange end 112; second heat exchange end 113; heat exchange channel plate 114; heat exchange sub-channel 115; first plate end 116; second plate end 117; auxiliary heat exchange plate 118; first heat exchange segment 119; second heat exchange segment 1110;
[0037] Liquid inlet section 120; liquid inlet channel 121; liquid inlet 122; liquid inlet pipe 123;
[0038] Liquid outlet section 130; liquid outlet channel 131; first liquid outlet section 132; second liquid outlet section 133; liquid outlet chamber 134; partition 135; liquid inlet 136; liquid outlet pipe 137; liquid outlet 138;
[0039] Liquid cooler radiator 200; inlet nozzle 210; outlet nozzle 220;
[0040] Fan 300. Detailed Implementation
[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0042] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.
[0043] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.
[0044] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.
[0045] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".
[0046] Example 1
[0047] This utility model relates to a converter, which includes a housing, several power devices, and other electronic components. It also includes a liquid-cooled heat exchange assembly, wherein at least some of the power devices dissipate heat through a liquid-cooled radiator 200 and / or a liquid-cooled heat exchanger 100 within the liquid-cooled heat exchange assembly. The power devices in the converter may be IGBT modules, which can be mounted against the heat dissipation surface of the liquid-cooled radiator 200 in the liquid-cooled heat exchange assembly, and further cooled by air-assisted cooling through the liquid-cooled heat exchanger 100.
[0048] Specifically, refer to Figure 1 The liquid-cooled heat exchange assembly includes a liquid-cooled radiator 200, a fan 300, and a liquid-cooled heat exchanger 100. The liquid-cooled heat exchanger 100 is connected to the liquid-cooled radiator 200 to circulate a liquid cooling medium. Typically, the converter, as a complete device, may also include a cold source system that provides a liquid cooling medium to the liquid-cooled heat exchange assembly. This liquid cooling medium can be a coolant commonly used in the liquid cooling field. In this embodiment, the liquid-cooled radiator 200 is plate-shaped, with several series and / or parallel radiator channels inside, and one side surface forming a heat dissipation surface. The power devices of the converter can be mounted against this heat dissipation surface for easy heat dissipation through the liquid-cooled radiator 200. The liquid-cooled radiator 200 is provided with an inlet nozzle 210 and an outlet nozzle 220 for communicating with a cold source to realize the circulation of liquid cooling medium. The inlet nozzle 210 is used to enter the internal radiator flow channel of the liquid-cooled radiator 200 with the low-temperature liquid cooling medium supplied by the cold source, and the outlet nozzle 220 is used to transport the liquid cooling medium in the liquid-cooled radiator 200, whose temperature has increased after heat exchange, back to the cold source for further cooling.
[0049] The liquid-cooled heat exchanger 100 can be directly mounted and fixed on the liquid-cooled radiator 200, and the internal flow channels of the liquid-cooled heat exchanger 100 and the liquid-cooled radiator 200 can be connected by welding or other methods. In this embodiment, the heat dissipation surface of the liquid-cooled heat exchanger 100 is vertically positioned on one side of the liquid-cooled radiator 200, which places the liquid-cooled heat exchanger 100 at a high position relative to the liquid-cooled radiator 200 in the entire liquid cooling system. The reason for this arrangement is that the liquid-cooled heat exchanger 100 needs to use the fan 300 to drive airflow to achieve air-cooled auxiliary heat dissipation of the internal space of the converter. The vertical arrangement can effectively deliver the air cooled by the liquid-cooled heat exchanger 100 in a forward direction towards the power devices and other electronic devices in the converter. These other electronic devices can be PCB boards and components such as capacitors and resistors mounted on the PCB boards. These electronic devices also generate a lot of heat during the operation of the converter, but since they cannot be directly attached to the liquid-cooled radiator 200 for heat dissipation, they need to be cooled by air. In this embodiment, the fan 300 is disposed on one side of the liquid-cooled heat exchanger 100. It can be directly fixedly mounted on the liquid-cooled heat exchanger 100, or it can be fixedly mounted on the liquid-cooled radiator 200 or the housing of the converter. In addition, in this liquid-cooled heat exchange assembly, one liquid-cooled radiator 200 can be provided, and multiple liquid-cooled heat exchangers 100 and fans 300 can be provided. At the same time, one liquid-cooled heat exchanger 100 can be arranged corresponding to one fan 300, so as to realize simultaneous air cooling of the internal space of the converter from multiple directions.
[0050] However, during the operation of a liquid cooling system, air may be mixed into the liquid cooling medium, or dissolved gases may precipitate due to temperature changes. Since the density of gas is less than that of liquid, it will naturally float in a gravitational field. In a conventional liquid-cooled heat exchanger 100, if the heat exchange channel 111 is located at a high position in the system and its top is not equipped with an exhaust channel higher than the channel itself, gas can easily stagnate at the highest point of the heat exchange channel 111, forming an air pocket. This air pocket occupies the channel cross-section, reducing the effective flow area and decreasing local heat exchange efficiency. In severe cases, it can lead to localized dry burning of the channel, affecting system stability. This problem is particularly pronounced in high-level heat exchangers far from the pump source, where the circulating pressure difference is small and the flow velocity is low, making it even more difficult for the gas to be carried away by the liquid. This embodiment improves this problem through structural modifications to the liquid-cooled heat exchanger 100. The specific structure of the liquid-cooled heat exchanger 100 is described below.
[0051] Reference Figure 2 The liquid-cooled heat exchanger 100 includes a heat exchange section 110, a liquid inlet section 120, a liquid outlet section 130, and auxiliary heat exchange plates 118.
[0052] Reference Figure 3The heat exchange section 110 is used to contact the external fluid to achieve heat exchange, and is provided with multiple heat exchange channels 111 arranged side by side in the vertical direction with the same length; the two ends of each heat exchange channel 111 are a first heat exchange end 112 and a second heat exchange end 113, respectively. In this embodiment, the external fluid is air, and the air flow direction is restricted by the fan 300 that cooperates with the liquid-cooled heat exchanger 100 and the air flow pipes in the heat exchange section 110. In this embodiment, the air passes through the heat exchange section 110 of the liquid-cooled heat exchanger 100 in a front-to-back direction. During the process of the air passing through the heat exchange section 110, the air comes into contact with the heat exchange section 110, and the liquid cooling medium circulates in the heat exchange channels 111 in the heat exchange section 110. The low-temperature liquid cooling medium exchanges heat with the air at the interface between the heat exchange section 110 and the air, taking away the heat from the air and reducing the temperature of the air after passing through the heat exchange section 110. These heat exchange channels 111 are arranged side by side in a vertical direction, and the length of each heat exchange channel 111 is the same. In this embodiment, the arrangement direction of each heat exchange channel 111 is up and down, the length direction of the heat exchange channel 111 is left and right, the shape of the heat exchange channel 111 is a straight line extending in the left and right direction, and the two ends of the length direction of the heat exchange channel 111 form a first heat exchange end 112 and a second heat exchange end 113 that are respectively connected to the liquid inlet 120 and the liquid outlet 130.
[0053] The heat exchange section 110 includes a plurality of heat exchange channel plates 114, each containing a heat exchange channel 111. At least a portion of the heat exchange channel plates 114 is flattened. The extension direction of the flattened portion of the heat exchange channel plate 114 defines the flow direction of external fluid through the heat exchange section 110. In this embodiment, the heat exchange channel plate 114 is elongated and flattened, with its two ends forming a first end 116 and a second end 117, respectively. The first end 116 and the second end 117 are connected to the liquid inlet section 120 and the liquid outlet section 130, respectively. Specifically, the heat exchange channel 111 is physically formed by providing a tubular structure with both ends extending through the heat exchange channel plate 114. At least a portion of the heat exchange channel plate 114 is flat, and this flat structure can extend horizontally. Thus, by arranging the heat exchange channel plates 114 side-by-side in the vertical direction, channels for airflow can be formed between the corresponding flat structures of adjacent heat exchange channel plates 114. In this embodiment, the heat exchange channel plate 114 is generally flat, with its length in the left-right direction, its width in the front-back direction, and its thickness in the vertical direction. Its length is much greater than its width, and its width is much greater than its thickness. When heat exchange channel plates 114 of this shape are arranged side-by-side to form the heat exchange section 110, gaps are formed between adjacent heat exchange channel plates 114 in the vertical direction. These gaps allow air to pass through, and the upper and lower interfaces of each gap—that is, the lower surface of the heat exchange channel plate 114 above the gap and the upper surface of the heat exchange channel plate 114 below the gap—form a heat exchange interface in contact with air. When a liquid cooling medium flows through the heat exchange channel 111 inside the heat exchange channel plate 114, heat exchange can be performed through the heat exchange interface. In addition, the heat exchange channel plates 114 have a first plate end 116 and a second plate end 117 formed at both ends in the left and right directions, respectively. The first plate end 116 and the second plate end 117 can be fixedly connected to the liquid inlet 120 and the liquid outlet 130 by welding.
[0054] The heat exchange channel plate 114, as the basic unit of the heat exchange module, has a heat exchange channel 111 inside and is at least partially flat. The extension direction of the flat portion is used to limit the flow direction of the external fluid (such as air). This design integrates the liquid cooling channel into the flat plate body, allowing the coolant to flow inside the plate while the external air sweeps laterally across the surface of the flat plate. The flat structure increases the contact area with air, and the limitation of the extension direction makes the airflow distribution more uniform, reduces flow separation and dead zones, and improves heat exchange efficiency. The parallel arrangement of the heat exchange channel plates 114 forms regular air channels between the plates. When the external fan 300 drives air to flow through these channels, a stable laminar or slightly disturbed flow field can be formed, maximizing the contact efficiency between the air and the heat exchange surface while controlling the flow resistance on the air side. The overall shape of the heat exchange channel plate 114 is a long, flat strip, with its two ends connected to the liquid inlet 120 and the liquid outlet 130, respectively. The shape of the heat exchange channel plate 114 ensures that the liquid-cooled heat exchanger 100 has a large heat exchange area, and the flow stability of the liquid cooling medium in the internal heat exchange channel 111 can be improved by reducing the bending structure, so as to maintain the flow and pressure balance at each position along the length of the heat exchange channel plate 114.
[0055] In this embodiment, each heat exchanger plate 114 is provided with a corresponding heat exchanger channel 111. The heat exchanger channel 111 includes a plurality of heat exchanger sub-channels 115. The heat exchanger sub-channels 115 belonging to the same heat exchanger channel 111 are arranged side by side in the heat exchanger plate 114 along the flow direction of the external fluid through the heat exchange section 110. (Refer to...) Figure 4 The heat exchange channel plate 114 is generally flat, thus it can be divided into multiple heat exchange sub-channels 115 arranged side by side along the width direction. All heat exchange sub-channels 115 located in the same heat exchange channel plate 114 cooperate to form a complete heat exchange channel 111. At the same time, the liquid inlet end of these heat exchange sub-channels 115 cooperates to form the first heat exchange end 112 of the heat exchange channel 111, and the liquid outlet end cooperates to form the second heat exchange end 113 of the heat exchange channel 111. Each heat exchange channel 111 is refined into multiple heat exchange sub-channels 115 arranged side by side along the external fluid flow direction. Dividing a single, wide channel into multiple narrow sub-channels, while keeping the total flow rate constant, increases the contact area between the liquid and the inner wall of the channel, i.e., increases the inner surface heat exchange area; on the other hand, the reduced channel size increases the average flow velocity of the liquid cooling medium in the channel and enhances the turbulence of the fluid. Higher flow velocities and stronger turbulence can significantly reduce the thickness of the laminar boundary layer near the pipe wall, thereby greatly improving the convective heat transfer coefficient from the liquid to the pipe wall. In addition, the internal stiffeners of the segmented sub-channels also play a supporting role, improving the structural strength of the flat heat exchange channel plate 114 against the internal fluid pressure.
[0056] In addition, refer to Figure 3 and Figure 4The auxiliary heat exchange fins 118 are located between adjacent heat exchange channel plates 114 in the vertical direction, and include several first heat exchange segments 119 extending in the same direction as the heat exchange channel plates 114, and second heat exchange segments 1110 extending vertically and connecting the adjacent first heat exchange segments 119 along the length direction of the heat exchange channel plates 114. The first heat exchange segments 119 are closely attached to the heat exchange channel plates 114 corresponding to their height positions in the auxiliary heat exchange fins 118. Specifically, the vertically adjacent heat exchange channel plates 114 form gaps. At this time, the part of the air in contact with the heat exchange section 110 is the upper and lower interface of each gap. Therefore, the heat exchange area in contact with the heat exchange section 110 is still not large enough, and the heat exchange efficiency is difficult to meet the requirements. For this reason, the auxiliary heat exchange fins 118 are provided, which are located between adjacent heat exchange channel plates 114 in the vertical direction, that is, at these gaps. The first heat exchange segment 119 in the auxiliary heat exchange plate 118 extends horizontally, and the second heat exchange segment 1110 extends vertically. These first heat exchange segments 119 are arranged in a staggered manner within a gap, contacting the heat exchange channel plates 114 above and below the gap respectively. Meanwhile, the second heat exchange segment 1110 extends vertically and longitudinally to increase the heat exchange area of the heat exchange section 110 and establish heat transfer channels between adjacent heat exchange channel plates 114. An auxiliary heat exchange plate 118 is added, located between adjacent heat exchange channel plates 114 in the vertical direction. It consists of a first heat dissipation section along the extension direction of the channel plate and a second heat dissipation section connecting adjacent first heat dissipation sections in the vertical direction, with the first heat dissipation section closely attached to the heat exchange channel plate 114 at the corresponding height. The auxiliary heat exchange fin 118 effectively increases the contact area between the entire heat exchange section 110 and the air while maintaining the elongated and flat shape of the heat exchange channel fin 114, thereby reducing the impact on the flow velocity and stability of the liquid cooling medium in the heat exchange channel 111. Furthermore, by being in close contact with the heat exchange channel fins 114 on both sides, when the temperature of one channel fin rises due to a higher local heat load, the heat can be conducted to the auxiliary heat exchange fin 118 through the first heat dissipation section and then laterally diffused to channel fins of other heights via the second heat dissipation section, achieving a redistribution of heat in the vertical direction. This design achieves the dual effects of enhanced thermal conductivity and expanded heat dissipation area without significantly increasing the volume. The first heat exchange segment 119 guides the heat from the heat exchange channel fin 114 to the second heat exchange segment 1110, which in turn increases the heat exchange area and transfers heat. If the first heat exchange segment 119 is not set up, the contact area between the second heat exchange segment 1110 and the heat exchange flow channel plate 114 is too small to achieve the expected effect.
[0057] It should be understood that the heat exchange channel plate 114 and the auxiliary heat exchange plate 118 mentioned above can be made of metal materials with good thermal conductivity, and the connection method can be welding or other suitable methods.
[0058] Reference Figure 2 and Figure 3 The liquid inlet section 120 is provided with a liquid inlet channel 121. The bottom of the liquid inlet channel 121 has an inlet port 122 suitable for receiving liquid cooling medium, and it is simultaneously connected to the first heat exchange end 112 of each heat exchange channel 111. The inlet port 122 is not higher than the first heat exchange end 112 of the lowest heat exchange channel 111. Specifically, the liquid inlet section 120 includes a vertically arranged square tube. The liquid inlet channel 121 is formed inside the square tube, and an inlet pipe 123 is provided at the bottom of the square tube. The inlet pipe 123 is connected to the liquid inlet channel 121 formed inside the square tube through an inlet port 122 located on the bottom wall of the square tube. The right side wall of the square tube is connected to the first end 116 of each heat exchange channel plate 114, thereby simultaneously connecting the liquid inlet channel 121 to the first heat exchange end 112 of each heat exchange channel 111. The first end 116 of the lowest heat exchange channel plate 114 is located above the inlet port 122.
[0059] Reference Figure 2 and Figure 3The liquid outlet section 130 is provided with an upwardly protruding and bent liquid outlet channel 131. The liquid outlet channel 131 includes a first liquid outlet section 132 and a second liquid outlet section 133 that are interconnected. The first liquid outlet section 132 is simultaneously connected to the second heat exchange end 113 of each heat exchange channel 111. The second liquid outlet section 133 is provided with a liquid outlet 138 suitable for discharging liquid cooling medium. The connection between the first liquid outlet section 132 and the second liquid outlet section 133 is the bend of the liquid outlet channel 131, and it is not lower than the second heat exchange end 113 of the highest heat exchange channel 111. Specifically, the liquid outlet section 130 also includes a vertically arranged square tube. The interior of the square tube is hollow, forming a liquid outlet chamber 134. A partition 135 extending upward from the bottom of the liquid outlet chamber 134 divides it into the aforementioned first liquid outlet section 132 and second liquid outlet section 133. A liquid inlet 136 is formed between the top of the partition 135 and the top of the liquid outlet chamber 134, and the liquid inlet 136 is the connection point between the first liquid outlet section 132 and the second liquid outlet section 133. A liquid outlet pipe 137 is provided at the bottom of the square tube. The liquid outlet pipe 137 is connected to the second liquid outlet section 133 in the liquid outlet section 130 through a liquid outlet 138 located at the bottom of the square tube and in the second liquid outlet section 133. The lower edge of the liquid inlet 136, which is the top of the partition 135, is higher than the second end 117 of the highest heat exchange channel plate 114. The liquid outlet section 130 is constructed as a hollow liquid outlet chamber 134, which is divided into a first liquid outlet section 132 and a second liquid outlet section 133 by a baffle 135 extending upward from the bottom of the chamber. A liquid inlet 136 is formed between the top of the baffle 135 and the top of the chamber, which serves as the connection point between the two sections. This structure achieves flow channel separation through a single internal baffle 135, avoiding the need for multi-tube welding or complex casting processes and potential leakage risks. Furthermore, compared to a U-shaped bend, it occupies less space in the width direction of the heat exchanger, making the entire liquid outlet section 130 more compact and facilitating the miniaturization and integrated design of the entire liquid-cooled heat exchanger 100.
[0060] In this embodiment, the first liquid outlet section 132 and the second liquid outlet section 133 in the liquid outlet channel 131 are arranged sequentially along the extension direction of each heat exchange channel 111, and the first liquid outlet section 132 is closer to each heat exchange channel 111 than the second liquid outlet section 133. (Refer to...) Figure 3The square tube forming the liquid outlet section 130 has a larger dimension in the left-right direction than in the front-back direction, thus leaving more space in the left-right direction for the first liquid outlet section 132 and the second liquid outlet section 133. A partition 135 located in the middle of the left-right direction divides the liquid outlet chamber 134 within the liquid outlet section 130 into the first liquid outlet section 132 and the second liquid outlet section 133, which are distributed to the left and right respectively. The second end 117 of each heat exchange channel plate 114 is located on the left side wall of the square tube of the liquid outlet section 130, that is, directly connected to the first liquid outlet section 132. In the liquid outlet channel 131, the first liquid outlet section 132 and the second liquid outlet section 133 are arranged sequentially along the extension direction of the heat exchange channel 111, with the first liquid outlet section 132 being closer to the heat exchange section 110 than the second liquid outlet section 133. This arrangement allows the liquid cooling medium to flow out of the heat exchange channel 111 and first enter the first liquid outlet section 132 adjacent to the heat exchange section 110. After accumulating, it flows vertically upwards past the bend in the liquid outlet channel 131 and enters the second liquid outlet section 133. With this arrangement, the flow direction of the liquid cooling medium into the second liquid outlet section 133 is consistent with the extension direction of the heat exchange channel 111, which can reduce the back pressure of each heat exchange channel 111 at the second heat exchange end 113 and further enhance the flow uniformity under the parallel structure.
[0061] In this embodiment, refer to Figure 1 The liquid-cooled heat exchanger 100 is vertically mounted on one side of the liquid-cooled radiator 200, opposite the heat dissipation surface of the liquid-cooled radiator 200. The bottoms of the inlet pipe 123 and outlet pipe 137 in the liquid-cooled heat exchanger 100 are welded to the liquid-cooled radiator 200, thereby connecting the inlet flow channel 121, heat exchange flow channel 111, and outlet flow channel 131 of the liquid-cooled heat exchanger 100 with the internal flow channels of the liquid-cooled radiator 200. The placement of the inlet pipe 123 and outlet pipe 137 allows for a higher height of the heat exchange section 110 of the liquid-cooled heat exchanger 100, facilitating direct air cooling of higher-positioned electrical components. Furthermore, as a preferred embodiment, the internal flow channel of the liquid-cooled radiator 200 can be connected in series with the flow channel in the liquid-cooled heat exchanger 100. That is, after the liquid cooling medium enters the liquid-cooled radiator 200 from the inlet 210, it will all pass through the liquid-cooled heat exchanger 100 and then flow back from the liquid-cooled heat exchanger 100 to the liquid-cooled radiator 200.
[0062] During operation, the liquid cooling medium enters the liquid inlet channel 121 of the liquid inlet section 120 from the liquid inlet pipe 123. While filling the liquid inlet channel 121, it flows into each heat exchange channel 111 and enters the liquid outlet channel 131 of the liquid outlet section 130 through the heat exchange channel 111. The liquid cooling medium first enters the first liquid outlet section 132 in the liquid outlet channel 131. After the first liquid outlet section 132 is filled with liquid cooling medium, the liquid cooling medium passes through the liquid inlet 136 and is then discharged from the liquid outlet 138 of the second liquid outlet section 133 to the liquid outlet pipe 137.
[0063] This embodiment relates to a liquid-cooled heat exchanger 100. By arranging multiple heat exchange channels 111 in a vertical direction with the same length and connecting them in parallel to the liquid inlet 120 and the liquid outlet 130, and providing an upwardly protruding and bent liquid outlet channel 131 only on the liquid outlet side, with the bend being higher than the second heat exchange end 113 of the highest heat exchange channel 111, and setting the liquid inlet 122 at the bottom of the liquid inlet 120, a reliable discharge path for high-level gas is provided through the parallel design and the coordinated operation of the single-sided high-point exhaust structure, while maintaining uniform flow distribution.
[0064] This design utilizes multiple heat exchange channels 111 arranged vertically side-by-side with uniform lengths to ensure that each channel has the same geometric path and hydraulic resistance. Based on this, the first heat exchange end 112 of all heat exchange channels 111 is simultaneously connected to the inlet channel 121, and the second heat exchange end 113 is simultaneously connected to the first outlet section 132 of the outlet channel 131. The inlet 122 is positioned at the bottom of the inlet section 120 and not higher than the first heat exchange end 112 of the lowest heat exchange channel 111, forming a parallel structure for the liquid cooling medium flow path. This structure ensures a uniform liquid cooling medium flow rate in each channel under the same inlet and outlet pressure difference, preventing some channels from becoming gas stagnation areas due to excessively low flow velocities caused by flow rate differences. Furthermore, the outlet channel 131 includes an interconnected first outlet section 132 and a second outlet section 133, which are bent and connected at a position higher than the second heat exchange end 113 of the highest heat exchange channel 111. This bend becomes the highest geometric point inside the entire heat exchanger. Since the second heat exchange end 113 of all heat exchange channels 111 is directly connected to the first liquid outlet section 132, and the first liquid outlet section 132 is adjacent to this high point, when the gas rises to its second heat exchange end 113 (i.e., the outlet end) in any heat exchange channel 111 due to buoyancy, it can continue to migrate upwards into the bend high point area of the liquid outlet channel 131. This high point is directly connected to the system outlet, and the gas can be smoothly discharged from the second liquid outlet section 133 along with the mainstream of the liquid cooling medium. In a typical installation scenario, the liquid-cooled heat exchanger 100 is arranged vertically, with the liquid inlet end at the bottom and the liquid outlet end at the top, and the liquid cooling medium flows from bottom to top. As the gas rises with the liquid flow in the channel, it is driven by buoyancy to continuously migrate towards the top of the channel, eventually accumulating near the outlet end. At this time, the bend structure of the high point of the liquid outlet channel 131 just covers this area, providing a clear channel for gas collection and discharge. Even during system startup or low-flow-rate operation (e.g., low load), gas can still enter the high point due to buoyancy and be carried out during subsequent flow, without relying on high pump pressure or additional venting devices. Furthermore, under normal operating conditions, the inlet pressure is high, and the liquid cooling medium enters from a low position, making gas accumulation at the inlet end difficult; even if a small amount of gas enters the flow channel, it will migrate towards the outlet end due to buoyancy during flow. Therefore, setting a high point only on the outlet side is sufficient to cover the main gas accumulation area, simplifying the structure while ensuring effective venting. This solution effectively solves the problem in existing technologies where heat exchangers located at higher positions have difficulty venting gas due to their distance from the pump source, significantly improving the heat exchange reliability and operational stability of the heat exchanger under gas-containing conditions.
[0065] Example 2
[0066] The difference between Embodiment 2 and Embodiment 1 lies in the layout of the liquid outlet channel 131 in the liquid outlet section 130: the first liquid outlet section 132 and the second liquid outlet section 133 in the liquid outlet channel 131 are arranged sequentially perpendicular to the extension direction of each heat exchange channel 111. Specifically, in this embodiment, the square tube constituting the liquid outlet section 130 is configured such that its front-to-back dimension is larger than its left-to-right dimension, thereby leaving more space in the front-to-back direction for setting the first liquid outlet section 132 and the second liquid outlet section 133. In this embodiment, the partition 135 is located in the middle position in the front-to-back direction, thereby dividing the liquid outlet chamber 134 in the liquid outlet section 130 into the front-to-back distributed first liquid outlet section 132 and second liquid outlet section 133, and the second end 117 of each heat exchange channel plate 114 is still set in the square tube of the liquid outlet section 130 on the left side wall corresponding to the first liquid outlet section 132, that is, it is still directly connected to the first liquid outlet section 132. This layout reduces the size of the heat exchanger along the length of the heat exchange channel 111. The smaller space occupied by the heat exchanger in this direction provides greater flexibility for external piping connections and improves the applicability of the heat exchanger in different integrated environments.
[0067] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.
Claims
1. A liquid-cooled heat exchanger (100), characterized in that, include: The heat exchange section (110) is used to contact the external fluid to achieve heat exchange, and is provided with a plurality of heat exchange channels (111) arranged side by side in the vertical direction and of the same length; the two ends of each heat exchange channel (111) are a first heat exchange end (112) and a second heat exchange end (113). The liquid inlet (120) is provided with a liquid inlet channel (121), and the bottom of the liquid inlet channel (121) is provided with a liquid inlet (122) suitable for receiving liquid cooling medium, and is simultaneously connected to the first heat exchange end (112) of each heat exchange channel (111); the liquid inlet (122) is not higher than the first heat exchange end (112) of the lowest heat exchange channel (111); The liquid outlet section (130) is provided with an upwardly protruding and bent liquid outlet channel (131). The liquid outlet channel (131) includes a first liquid outlet section (132) and a second liquid outlet section (133) that are interconnected. The first liquid outlet section (132) is simultaneously connected to the second heat exchange end (113) of each of the heat exchange channels (111). The second liquid outlet section (133) is provided with a liquid outlet (138) suitable for discharging liquid cooling medium. The connection between the first liquid outlet section (132) and the second liquid outlet section (133) is the bend of the liquid outlet channel (131), and it is not lower than the second heat exchange end (113) of the highest heat exchange channel (111).
2. The liquid-cooled heat exchanger (100) as described in claim 1, characterized in that, The first liquid outlet section (132) and the second liquid outlet section (133) in the liquid outlet channel (131) are arranged sequentially along the extension direction of each heat exchange channel (111), and the first liquid outlet section (132) is closer to each heat exchange channel (111) than the second liquid outlet section (133).
3. The liquid-cooled heat exchanger (100) as described in claim 1, characterized in that, The first liquid outlet section (132) and the second liquid outlet section (133) in the liquid outlet channel (131) are arranged in sequence perpendicular to the extension direction of each heat exchange channel (111).
4. A liquid-cooled heat exchanger (100) as described in any one of claims 1-3, characterized in that, The liquid outlet section (130) is hollow inside to form a liquid outlet chamber (134), and is divided into a first liquid outlet section (132) and a second liquid outlet section (133) by a partition (135) extending upward from the bottom of the liquid outlet chamber (134); a liquid inlet (136) is formed between the top of the partition (135) and the top of the liquid outlet chamber (134); the liquid inlet (136) is the connection between the first liquid outlet section (132) and the second liquid outlet section (133).
5. A liquid-cooled heat exchanger (100) as described in claim 1, characterized in that, The heat exchange section (110) includes a plurality of heat exchange channel plates (114); the heat exchange channel plates (114) are provided with heat exchange channels (111) inside, and the heat exchange channel plates (114) are at least partially flat; the extension direction of the flat portion on the heat exchange channel plates (114) is used to define the flow direction of external fluid through the heat exchange section (110).
6. A liquid-cooled heat exchanger (100) as described in claim 5, characterized in that, Each heat exchange channel plate (114) is provided with a corresponding heat exchange channel (111), and the heat exchange channel (111) includes a plurality of heat exchange sub-channels (115). Each heat exchange sub-channel (115) belonging to the same heat exchange channel (111) is arranged side by side in the heat exchange channel plate (114) along the flow direction of the external fluid through the heat exchange part (110).
7. A liquid-cooled heat exchanger (100) as described in claim 5, characterized in that, The heat exchange channel plate (114) is long and flat, with its two ends in the length direction forming a first plate end (116) and a second plate end (117), respectively. The first plate end (116) and the second plate end (117) are connected to the liquid inlet (120) and the liquid outlet (130), respectively.
8. A liquid-cooled heat exchanger (100) as described in claim 7, characterized in that, It also includes an auxiliary heat exchange plate (118) located between adjacent heat exchange channel plates (114) in the vertical direction, and includes a plurality of first heat exchange segments (119) that extend in the same direction as the heat exchange channel plates (114), and a second heat exchange segment (1110) that connects the first heat exchange segments (119) adjacent in the length direction of the heat exchange channel plates (114) and extends in the vertical direction; the first heat exchange segment (119) is closely attached to the heat exchange channel plate (114) corresponding to its height position in the auxiliary heat exchange plate (118).
9. A liquid-cooled heat exchange assembly, comprising a liquid-cooled radiator (200) and a fan (300), characterized in that, It also includes a liquid-cooled heat exchanger (100) as described in any one of claims 1-8; the liquid-cooled heat exchanger (100) is connected to the liquid-cooled radiator (200) to circulate the liquid cooling medium; the fan (300) is used to drive air fluid through the heat exchange section (110) of the liquid-cooled heat exchanger (100).
10. A converter comprising a plurality of power devices, characterized in that, It also includes the liquid-cooled heat exchange assembly as described in claim 9; at least a portion of the power devices dissipate heat through the liquid-cooled radiator (200) and / or the liquid-cooled heat exchanger (100) in the liquid-cooled heat exchange assembly.