A phase change heat transfer device

Abstract

The application relates to a phase change heat exchange device. The phase change heat exchange device comprises a shell provided with a containing cavity and a fin assembly arranged in the containing cavity, and the shell is provided with an inlet and an outlet for the flow of a heat exchange medium. The fin assembly comprises a plurality of fins arranged side by side, fluid channels for the flow of the heat exchange medium are formed between adjacent fins, through holes are formed in the fins and pass through both sides of the fins, the through holes are connected with adjacent fluid channels to allow the liquid heat exchange medium to flow in the direction of the fins, and the surface of the fin is provided with a capillary structure for generating capillary force to guide the liquid heat exchange medium to flow in the direction of the surface of the fin. The phase change heat exchange device can improve the temperature uniformity and heat exchange efficiency of the liquid cooling plate and improve the heat exchange performance.

Description

Technical Field

[0001] This application relates to the field of heat exchanger technology, and in particular to a phase change heat exchange device. Background Technology

[0002] With the rapid development of AI, high-performance computing (HPC), and large-scale models, the power consumption of data center chips is increasing exponentially. Traditional air cooling technology faces severe challenges in terms of heat dissipation efficiency, energy consumption, and rack power density. Its heat dissipation capacity is limited by the physical characteristics of air's low thermal conductivity and limited fan efficiency, making it difficult to meet the heat dissipation requirements of chips exceeding 500 watts. Furthermore, it suffers from high energy consumption and incompatibility with high-density scenarios. At the same time, the localized hotspot effect caused by air cooling systems significantly shortens equipment lifespan. In contrast, liquid cooling technology, with its diverse solutions, demonstrates significant advantages and has become the mainstream heat dissipation solution.

[0003] In the wave of continuous innovation in chip technology, the heat dissipation power of chips is increasing at an alarming rate. Faced with such high heat flux density, the heat dissipation capacity of traditional single-phase liquid cooling plates can no longer meet the requirements. Two-phase cooling plates, with their phase change heat transfer characteristics, utilize the latent heat carried by the coolant during the liquid-to-gas transition. This not only allows for the transfer of more heat per unit mass but also provides excellent temperature uniformity, making them a next-generation core solution for overcoming the bottlenecks in heat dissipation technology. Phase change liquid cooling technology, as a highly efficient heat dissipation method, is widely used in electronic equipment, new energy batteries, and industrial equipment. Its core principle is to absorb heat through the phase change process of the heat exchange medium (such as refrigerant) between liquid and gaseous states, thereby achieving efficient thermal management. Existing phase change liquid cooling plates typically employ a structure combining a shell and finned assemblies. The finned assemblies guide the flow of the heat exchange medium by forming fluid channels and expand the heat exchange area through the fin surface.

[0004] However, traditional phase change liquid cooling plates suffer from problems such as insufficient flow uniformity and localized evaporation in practical applications, affecting heat exchange efficiency and temperature uniformity. Specifically, when the heat exchange medium flows between the fins, the simple channel structure easily leads to uneven distribution of the liquid medium. Some areas form heat stagnation zones due to slow medium flow or insufficient medium distribution, reducing the overall heat exchange efficiency. Moreover, since the fin surface is usually smooth or has a simple textured structure, its ability to guide and adsorb the liquid medium is weak, making it difficult for the liquid medium to spread evenly along the fin surface, further exacerbating the uneven heat exchange phenomenon.

[0005] Therefore, it is necessary to propose a new technical solution to overcome the shortcomings of existing technologies. Utility Model Content

[0006] Based on this, this application provides a phase change heat exchange device to solve the problems of uneven temperature distribution and low heat exchange efficiency of liquid cooling plates.

[0007] Therefore, this application adopts the following technical solution: a phase change heat exchange device, comprising a shell forming a receiving cavity and a fin assembly disposed in the receiving cavity, the shell having an inlet and an outlet for the heat exchange medium to flow into and out of the receiving cavity, the fin assembly comprising a plurality of fins arranged side by side, with fluid channels formed between adjacent fins for the heat exchange medium to circulate, the fins also having through holes penetrating both sides of the fins, the through holes connecting adjacent fluid channels to allow liquid heat exchange medium to flow in the direction penetrating the fins, the surface of the fins being provided with capillary structures, the capillary structures being used to generate capillary forces to guide the liquid heat exchange medium to flow in the direction along the fin surface.

[0008] In some embodiments, each of the fins extends in a first direction, and a plurality of fins are arranged in a second direction perpendicular to the first direction.

[0009] In some embodiments, the top of the fin assembly has a protrusion and a recess, the recess forming an exhaust channel.

[0010] In some embodiments, each fin has a plurality of protrusions and recesses formed on its top, the plurality of protrusions and recesses being arranged alternately in the first direction.

[0011] In some embodiments, each fin includes a vertically extending longitudinal plate portion, a bottom edge portion extending laterally from the lower end of the longitudinal plate portion, and a top edge portion extending laterally from a portion of the upper end of the longitudinal plate portion, wherein the top edges of a plurality of fins are arranged to form the protrusion.

[0012] In some embodiments, the housing includes a flow channel plate covering the fin assembly, the exhaust channel being spaced apart from the flow channel plate, and the flow channel plate having a gas guide groove communicating with the outlet on the side facing the fin assembly.

[0013] In some embodiments, the flow channel plate has a vertically penetrating strip-shaped air outlet, one end of the gas guide groove is connected to the strip-shaped air outlet, and the strip-shaped air outlet extends along the second direction.

[0014] In some embodiments, the flow channel plate has a liquid inlet diversion groove on the side facing away from the fin assembly, which communicates with the inlet. The liquid inlet diversion groove expands or extends at the same width from one end near the inlet to the other end.

[0015] In some embodiments, the flow channel plate has a vertically penetrating strip-shaped liquid inlet, which is connected to the end of the liquid inlet diversion channel and extends along the second direction.

[0016] In some embodiments, the housing includes an upper cover plate covering the flow channel plate and a lower bottom plate disposed below the flow channel plate and fin assembly, the inlet and outlet being opened on the upper cover plate, and the flow channel plate and fin assembly being sealed and fixed to the lower bottom plate.

[0017] The phase change heat exchange device provided in this application has through holes on both sides of the fins. The through holes connect adjacent fluid channels to allow the liquid heat exchange medium to flow in the direction through the fins. This allows the liquid medium to respond quickly to local temperature changes during the phase change process and replenish other fluid channels through the through holes, effectively eliminating heat stagnation zones, improving the uniformity of medium distribution, and preventing the drying out of individual fluid channels. The surface of the fins is provided with capillary structures, which actively guide the liquid medium to spread along the surface through capillary force, significantly enhancing the fins' adsorption capacity for the liquid medium. The capillary structures allow the liquid medium to form a more uniform thin film covering the fin surface, effectively replenishing the liquid medium to the dried-out areas on the fin surface, solving the problem of local drying out, expanding the effective heat exchange area, and improving heat exchange efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a perspective view of an embodiment of the phase change heat exchange device of this application.

[0020] Figure 2 This is an exploded perspective view of an embodiment of the phase change heat exchange device of this application.

[0021] Figure 3 This is a cross-sectional view of an embodiment of the phase change heat exchanger of this application.

[0022] Figure 4 This is a perspective view of the flow channel plate in one embodiment of the phase change heat exchange device of this application.

[0023] Figure 5 This is another perspective view of the flow channel plate in one embodiment of the phase change heat exchange device of this application.

[0024] Figure 6 This is a perspective view of a fin assembly in one embodiment of the phase change heat exchange device of this application.

[0025] Figure 7 for Figure 6 A magnified view of a portion of point A in the middle.

[0026] The component labels are as follows:

[0027] 100. Phase change heat exchanger; 1. Shell; 11. Inlet connector; 12. Outlet connector; 110. Inlet; 120. Outlet; 13. Top cover plate; 14. Flow channel plate; 141. Liquid inlet diversion channel; 142. Strip-shaped liquid inlet; 143. Strip-shaped gas outlet; 144. Gas guide channel; 15. Bottom plate; 2. Fin assembly; 20. Fin; 201. Fluid channel; 21. Recess; 22. Protrusion; 23. Through hole; 24. Longitudinal plate; 25. Bottom edge; 26. Top edge. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0029] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0033] Please see Figures 1 to 7 As shown, this application provides a phase change heat exchange device 100, including a housing 1 with a receiving cavity and a fin assembly 2 disposed in the receiving cavity. The housing 1 is provided with an inlet 110 and an outlet 120 for the heat exchange medium to flow into and out of the receiving cavity. The fin assembly 2 includes a plurality of fins 20 arranged side by side, and a fluid channel 201 for the heat exchange medium to flow between adjacent fins 20. The fins 20 are also provided with through holes 23 penetrating both sides of the fins 20. The through holes 23 connect adjacent fluid channels 201 to allow the liquid heat exchange medium to flow in the direction penetrating the fins 20. The surface of the fins 20 is provided with a capillary structure, which is used to generate capillary force to guide the liquid heat exchange medium to flow in the direction along the surface of the fins 20.

[0034] The phase change heat exchange device 100 provided in this application has through holes 23 on the fins 20, which connect to multiple fluid channels 201 to allow the liquid heat exchange medium to flow in the direction of the fins 20. This allows the liquid medium to respond quickly to local temperature changes during the phase change process and replenish other fluid channels 201 through the through holes 23, effectively eliminating heat retention areas, improving the uniformity of medium distribution, and preventing the drying out of individual fluid channels 201. The surface of the fins 20 is provided with capillary structures, which actively guide the liquid medium to spread along the surface through capillary force, significantly enhancing the adsorption capacity of the fins 20 for the liquid medium. The capillary structures enable the liquid medium to form a more uniform thin film covering the surface of the fins 20, which can effectively replenish the liquid medium to the dried-out areas on the surface of the fins 20, solving the problem of local drying out, expanding the effective heat exchange area, and improving the heat exchange efficiency.

[0035] The phase change heat exchange device 100 provided in this application achieves efficient distribution and uniform temperature control of the liquid heat exchange medium during the phase change process through structural optimization and surface treatment technology. The following is in conjunction with the appendix... Figure 1 To be continued Figure 7 This paper provides a comprehensive explanation of the structural features, working principle, and technical advantages of this device.

[0036] like Figures 1 to 3As shown, in this embodiment, the phase change heat exchange device 100 mainly includes a housing 1 and a fin assembly 2. The housing 1 forms a sealed receiving cavity, and the fin assembly 2 is disposed within the receiving cavity. The housing 1 has an inlet 110 and an outlet 120 communicating with the receiving cavity. The inlet 110 is connected to an inlet connector 11, and the outlet 120 is connected to an outlet connector 12. The inlet connector 11 and the outlet connector 12 are used to connect to external equipment through pipelines to realize the circulation of the heat exchange medium. In this embodiment, the phase change heat exchange device 100 has an overall flat rectangular structure, which is suitable for the bonding and installation of heat dissipation components such as data center chips and new energy vehicle battery modules in high-power electronic devices.

[0037] In this embodiment, the housing 1 includes an upper cover plate 13, a flow channel plate 14, and a lower base plate 15. The upper cover plate 13, the flow channel plate 14, and the lower base plate 15 are welded together to form a sealed connection. The welding can be brazing or laser welding. In other embodiments, the upper cover plate 13, the flow channel plate 14, and the lower base plate 15 can also be connected in other ways to form a sealed connection, such as using screws, bolts, or snap-fit ​​connections with sealing elements. In this embodiment, the flow channel plate 14 is an inverted box shape, and both the upper cover plate 13 and the lower base plate 15 are plate-shaped. The upper cover plate 13 covers the flow channel plate 14, and the lower base plate 15 is located below the flow channel plate 14 and covers the opening of the flow channel plate 14, together forming the flow space for the heat exchange medium. The inlet 110 and outlet 120 are located on the upper cover plate 13, extending vertically through the upper cover plate 13, and are respectively connected to the external circulation pipeline through the inlet connector 11 and the outlet connector 12.

[0038] Please see Figure 4 and Figure 5As shown, the flow channel plate 14 has a strip-shaped liquid inlet 142 communicating with the inlet 110 and a strip-shaped air outlet 143 communicating with the outlet 120. In this embodiment, the front side of the flow channel plate 14, that is, the side of the flow channel plate 14 facing away from the fin assembly 2, has a liquid inlet diversion channel 141 communicating with the inlet 110. The liquid inlet diversion channel 141 expands and extends from one end near the inlet 110 to the other end. That is, the liquid inlet diversion channel 141 expands and extends from one end near the inlet 110 towards the strip-shaped liquid inlet 142, and its cross-sectional area gradually increases, with its end communicating with the strip-shaped liquid inlet 142. The liquid inlet diversion channel 141 includes a plurality of radially extending diversion ribs to evenly divert the liquid heat exchange medium to the strip-shaped liquid inlet 142. This design allows the liquid heat exchange medium entering from inlet 110 to be evenly diffused through the inlet distribution channel 141, avoiding excessively large or small local flow rates and ensuring that the liquid medium can be evenly distributed into each fluid channel 201 of the fin assembly 2. The shape of the distribution ribs can be straight, arc-shaped, or corrugated, etc.

[0039] In some other embodiments, the liquid inlet diversion channel 141 can be configured to extend at a constant width from one end near the inlet 110 to the strip-shaped liquid inlet 142. That is, the width of the liquid inlet diversion channel 141 is basically equal at all points in the liquid flow direction, so that the liquid entering the liquid inlet diversion channel 141 from the inlet 110 is roughly evenly distributed in the liquid inlet diversion channel 141 and then enters the multiple fluid channels 201 formed by the fin assembly 2 through the strip-shaped liquid inlet 142.

[0040] On the back side of the flow channel plate 14, that is, on the side of the flow channel plate 14 facing the fin assembly 2, a gas guide groove 144 is provided, which communicates with the outlet 120. One end of the gas guide groove 144 is connected to the strip-shaped gas outlet 143. With this configuration, during the phase change process of the heat exchange medium, the gaseous medium generated at the top of the fin assembly 2 can pass through the gas guide groove 144 and ultimately flow into the outlet 120 through the strip-shaped gas outlet 143 for discharge. This design achieves efficient separation of the gas and liquid phases, avoiding the decrease in heat exchange efficiency caused by gas accumulation in the fluid channel.

[0041] Please see Figure 2 , Figure 3 , Figure 6 and Figure 7As shown, the fin assembly 2 is composed of multiple fins 20 arranged side-by-side in the second direction F2, with fluid channels 201 for heat exchange medium to flow between adjacent fins 20. The multiple side-by-side fins 20 form multiple side-by-side fluid channels 201. The extension direction of each fin 20 is the first direction F1, consistent with the extension direction of the fluid channel 201. The inlet 110 and outlet 120 are arranged at both ends of the upper cover plate 13 along the first direction F1. This arrangement optimizes the flow path of the fluid within the fin assembly 2 and reduces flow resistance. In this embodiment, the top of the fin assembly 2 has protrusions 22 and recesses 21, with the recesses 21 constituting an exhaust channel. Each fin 20 has multiple protrusions 22 and recesses 21 on its top, which are alternately arranged in the first direction F1. When the multiple fins 20 are arranged in the second direction F2, the recesses 21 form an exhaust channel extending along the second direction F2. In this embodiment, the strip-shaped liquid inlet 142 and the strip-shaped air outlet 143 also extend along the second direction F2 to communicate with the ends of the multiple fluid channels 201 of the fin assembly 2, respectively.

[0042] In this embodiment, the fin 20 is a C-shaped snap-fit ​​fin. Specifically, each fin 20 includes a vertically extending longitudinal plate portion 24, a bottom edge portion 25 extending laterally from the lower end of the longitudinal plate portion 24, and a top edge portion 26 extending laterally from a portion of the upper end of the longitudinal plate portion 24. The bottom edge portion 25 and the top edge portion 26 are both located on the same side of the longitudinal plate portion 24. When viewed from the end of the fin 20, the fin 20 is C-shaped, i.e., C-shaped. Figure 6 and Figure 7 As shown, the top edges 26 of multiple fins 20 are arranged to form the protrusions 22. Multiple top edges 26 of each fin 20 are spaced apart in a first direction F1, with the portions having top edges 26 protruding more than those without, thus forming a top structure with alternating protrusions 22 and recesses 21. The recesses 21 constitute exhaust channels, guiding the gaseous heat exchange medium upwards during phase change, preventing gas from stagnating in the fluid channel 201 and affecting the circulation of the liquid medium. After the fin assembly 2 is assembled in the housing 1, the protrusions 22 can contact the inner surface of the flow channel plate 14, while the exhaust channels formed by the recesses 21 are spaced from the inner surface of the flow channel plate 14 to ensure reliable exhaust. The exhaust channels prevent the vapor generated during phase change from failing to escape in time, thus avoiding air blockage between the fins 20 and preventing the formation of an insulation layer that could affect the local heat transfer coefficient. The exhaust channel can guide the steam flow, avoid the reduction of the flow channel cross-sectional area caused by local steam accumulation, maintain the continuity of the heat exchange medium and the efficient heat exchange of the fin 20 surface.

[0043] In this embodiment, each fin 20 has multiple through holes 23 penetrating both sides of it. These through holes 23 are distributed along the length direction of the fin 20 (i.e., the first direction F1) and connect to adjacent fluid channels 201 in the second direction F2. The through holes 23 break the independence of the fluid channels 201 between the traditional fins 20, allowing the liquid heat exchange medium to flow in the direction penetrating the fins 20. When the liquid medium in a certain fluid channel 201 decreases due to evaporation, the liquid medium in the adjacent channel can be quickly replenished through the through holes 23, effectively eliminating local heat retention areas and preventing the fluid channels from drying out.

[0044] In this embodiment, the fin assembly 2 is welded and fixed to the lower base plate 15, specifically, each fin 20 is welded to the lower base plate 15 via its bottom edge 25. The bottom edge 25 facilitates welding and enhances welding reliability. In other embodiments, the fin assembly 2 can also be connected to the lower base plate 15 using screws, bolts, clips, or other connection structures in conjunction with sealing elements to form a sealed connection. In this embodiment, the lower base plate 15 is made of diamond-copper composite material, which has a high thermal conductivity, improving overall heat transfer efficiency. Of course, in other embodiments, the lower base plate 15 can also be made of other materials.

[0045] In this embodiment, the surface of the fin 20 is provided with a capillary structure. The capillary structure can be disposed on the entire surface of the fin 20, i.e., on the longitudinal plate portion 24, the bottom edge portion 25, and the top edge portion 26, or it can be disposed on a portion of the surface of the fin 20 as needed. In this embodiment, the capillary structure is formed by a high-cleanliness capillary process. Specifically, the capillary structure can be formed through micro-nano fabrication techniques, such as chemical etching, laser drilling, or deposition of porous metal coatings, and its surface has a large number of micron-level grooves or pores. The capillary structure increases surface roughness, which increases the number of vaporization nuclei. Simultaneously, the capillary force generated between the capillary structures helps bubbles detach from the fin surface, preventing bubble aggregation and boiling. Furthermore, the capillary force actively guides the liquid heat exchange medium along the surface of the fin 20 towards the evaporation area, forming a more uniform liquid film coverage, continuously replenishing the heat exchange medium consumed by evaporation, and preventing localized drying of the fin 20 surface. This design significantly enhances the adsorption capacity of fin 20 for liquid media, expands the effective heat exchange area, and solves the problem of uneven liquid film distribution that is prone to occur on the surface of traditional smooth fins.

[0046] The assembly process of the phase change heat exchanger 100 provided in this application is as follows: Place the fin assembly 2 on the lower base plate 15, ensuring that the bottom edge 25 is in contact with the surface of the lower base plate 15; cover the fin assembly 2 with the flow channel plate 14, aligning the strip-shaped liquid inlet 142 with one end of the fluid channel 201 and the strip-shaped air outlet 143 with the other end of the fluid channel 201 of the fin assembly 2; cover the flow channel plate 13 with the flow channel plate 14, and fix the flow channel plate 14, the fin assembly 2 and the lower base plate 15 into one piece by welding; finally connect the inlet 110 and the outlet 120 to the external circulation system through the inlet connector 11 and the outlet connector 12, respectively.

[0047] During operation, the liquid heat exchange medium enters the liquid inlet distribution channel 141 of the flow channel plate 14 from the inlet 110, and is evenly distributed to each fluid channel 201 through the strip-shaped liquid inlet 142. Within the fluid channels 201, the liquid medium flows along the first direction F1, and simultaneously adsorbs and expands through the capillary structure on the surface of the fins 20, forming a uniform liquid film. When the liquid medium absorbs heat and reaches its boiling point, a phase change occurs on the surface of the fins 20, transforming it into a gaseous medium, carrying a large amount of latent heat. The gaseous medium rises to the recess 21 (exhaust channel) at the top of the fin assembly 2, and is discharged through the outlet 120 via the gas guide channel 144 and the strip-shaped exhaust port 143.

[0048] As described above in the specific embodiments, the phase change heat exchange device 100 provided in this application allows the liquid medium to flow laterally between adjacent fluid channels 201 through the through holes 23 on the fins 20. When the liquid medium in a certain fluid channel 201 decreases due to evaporation, the liquid medium in the adjacent channel can be quickly replenished through the through holes 23, effectively eliminating local evaporation. At the same time, the capillary structure on the fin surface continuously guides the liquid medium to expand towards the evaporation area through capillary force, ensuring uniform coverage of the liquid film. This dual replenishment mechanism significantly improves the uniformity of medium distribution and expands the effective heat exchange area. In addition, the expansion structure of the liquid inlet diversion channel 141 and the lateral extension design of the strip-shaped liquid inlet 142 achieve uniform distribution of the liquid medium; the cooperation between the gas guide channel 144 and the strip-shaped gas outlet 143 achieves efficient discharge of the gas medium. This gas-liquid separation flow channel design avoids the problem of reduced heat exchange efficiency caused by gas retention in traditional devices.

[0049] Compared to traditional phase change liquid cooling plates, this device, through a combination of structural optimization and surface treatment technology, and innovative features such as fin through-hole design, surface capillary structure, and optimized flow channel plate layout, achieves uniform distribution and efficient replenishment of the liquid medium during the phase change process, solving the problems of uneven flow and localized drying in traditional devices. Its compact structure, high heat exchange efficiency, and strong adaptability enable it to reliably meet the heat dissipation requirements of high-power chips, providing a reliable technical solution for the thermal management of next-generation high-power electronic devices. This phase change heat exchange device 100 can be widely used in high heat flux density scenarios such as data center chips, new energy vehicle battery modules, and industrial laser equipment. Its compact structural design and efficient heat exchange performance are particularly suitable for environments with limited space and stringent heat dissipation requirements. The phase change heat exchange device 100 provided in this application, when used in conjunction with an external circulation system (such as a compressor or condenser), can construct a complete two-phase liquid cooling solution.

[0050] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A phase change heat exchange device, comprising a shell (1) forming a receiving cavity and a fin assembly (2) disposed in the receiving cavity, wherein the shell (1) is provided with an inlet (110) and an outlet (120) for the heat exchange medium to flow into and out of the receiving cavity, characterized in that, The fin assembly (2) includes a plurality of fins (20) arranged side by side, with fluid channels (201) formed between adjacent fins (20) for the flow of the heat exchange medium. The fins (20) are also provided with through holes (23) that penetrate both sides of the fins (20). The through holes (23) connect to the adjacent fluid channels (201) to allow the liquid heat exchange medium to flow in the direction through the fins (20). The surface of the fins (20) is provided with capillary structures to generate capillary forces to guide the liquid heat exchange medium to flow in the direction along the surface of the fins (20).

2. The phase change heat exchanger according to claim 1, characterized in that, Each of the fins (20) extends in a first direction, and the plurality of fins (20) are arranged in a second direction perpendicular to the first direction.

3. The phase change heat exchanger according to claim 2, characterized in that, The top of the fin assembly (2) has a protrusion (22) and a recess (21), the recess (21) forming an exhaust channel.

4. The phase change heat exchanger according to claim 3, characterized in that, Each of the fins (20) has a plurality of protrusions (22) and recesses (21) formed on its top, the plurality of protrusions (22) and recesses (21) being arranged alternately in the first direction.

5. The phase change heat exchanger according to claim 3, characterized in that, Each of the fins (20) includes a vertically extending longitudinal plate portion (24), a bottom edge portion (25) extending laterally from the lower end of the longitudinal plate portion (24), and a top edge portion (26) extending laterally from a portion of the upper end of the longitudinal plate portion (24), wherein the top edges (26) of the plurality of fins (20) are arranged to form the protrusion (22).

6. The phase change heat exchanger according to claim 3, characterized in that, The housing (1) includes a flow channel plate (14) covering the fin assembly (2), and there is a gap between the exhaust channel and the flow channel plate (14). The side of the flow channel plate (14) facing the fin assembly (2) has a gas guide groove (144) communicating with the outlet (120).

7. The phase change heat exchanger according to claim 6, characterized in that, The flow channel plate (14) has a vertically penetrating strip-shaped air outlet (143), one end of the gas guide groove (144) is connected to the strip-shaped air outlet (143), and the strip-shaped air outlet (143) extends along the second direction.

8. The phase change heat exchanger according to claim 6, characterized in that, The flow channel plate (14) has a liquid inlet diversion channel (141) on the side facing away from the fin assembly (2) that communicates with the inlet (110). The liquid inlet diversion channel (141) expands or extends at the same width from one end near the inlet (110) to the other end.

9. The phase change heat exchanger according to claim 8, characterized in that, The flow channel plate (14) has a vertically penetrating strip-shaped liquid inlet (142), which is connected to the end of the liquid inlet diversion channel (141) and extends along the second direction.

10. The phase change heat exchanger according to any one of claims 6 to 9, characterized in that, The housing (1) includes an upper cover plate (13) covering the flow channel plate (14) and a lower bottom plate (15) disposed below the flow channel plate (14) and the fin assembly (2). The inlet (110) and outlet (120) are opened on the upper cover plate (13), and the flow channel plate (14) and the fin assembly (2) are sealed and fixed to the lower bottom plate (15).

Images