All-working-condition immersed liquid cooling device

Abstract

The utility model relates to a full-working-condition immersed liquid cooling device, which comprises an evaporation section, a condensation section, a mounting bracket and a liquid absorption core coating layer, and is characterized in that the evaporation section is provided with an evaporation cavity filled with a liquid working medium, one end of the mounting bracket is mounted on the bottom wall of the evaporation cavity, and the other end of the mounting bracket is supported on one side, close to the bottom wall of the evaporation cavity, of a power element; the wick coating layer coats at least part of the outer surfaces of the power element and the mounting bracket, and a liquid working medium at the bottom of the evaporation cavity can be adsorbed to the outer surface of the power element through the wick coating layer; the liquid working medium in the coating layer of the liquid absorption core can absorb heat to be gasified into a gaseous working medium, enters the condensation section, releases heat to be liquefied into a liquid working medium in the condensation section and flows back to the evaporation section. According to the full-working-condition immersed liquid cooling device provided by the invention, the problems that the power element is intermittently exposed above the liquid level of the working medium due to sudden acceleration change generated in the operation of the mobile equipment, so that the power element is easily locally overheated and even is subjected to dry burning are solved.

Description

Technical Field

[0001] This application relates to the field of heat pipe device technology, and in particular to a full-condition immersion liquid cooling device. Background Technology

[0002] Immersion liquid cooling technology is a technique that directly dissipates heat by completely immersing heat-generating power components (such as CPUs, GPUs, motor stator windings, batteries, servers, etc.) in a specific working fluid (a special coolant with a low boiling point). Its core principle is to utilize the high thermal conductivity and convection properties of the liquid working fluid to transfer the heat generated by the power components to the cooling system through direct contact or phase change heat absorption, thereby achieving efficient heat dissipation.

[0003] Furthermore, based on whether the working fluid undergoes a phase change, this technology can be divided into two categories: the first is non-phase change immersion liquid cooling, specifically, using a high-boiling-point working fluid (such as mineral oil), relying entirely on the sensible heat change of the liquid state for heat exchange, and the working fluid undergoes no phase change process; the second is phase change immersion liquid cooling, specifically, using low-boiling-point fluorinated liquids, water, ethanol, or other working fluids, achieving heat transfer from the liquid to the gaseous state through a phase change process. Both of these immersion liquid cooling technologies achieve high integration and efficient heat exchange performance by eliminating the contact thermal resistance in traditional heat dissipation methods, and this technology has been maturely applied in fixed scenarios such as wind, solar, and energy storage systems, and data centers.

[0004] However, when immersion liquid cooling technology is extended to mobile equipment such as new energy vehicles, drones, and humanoid robots, it faces some unique challenges. Specifically, the sudden acceleration changes generated by mobile devices during operation (including rapid acceleration, emergency braking, high-speed steering, and tilting) can cause unsteady flow of the working fluid, resulting in some power components being intermittently exposed above the liquid surface. This dynamic liquid level change will cause the following problems: the exposed areas of the power components lose cooling from the working fluid, leading to localized overheating and eventually dry burning. This will significantly reduce the reliability and lifespan of the power components. Utility Model Content

[0005] Therefore, it is necessary to provide a full-condition immersion liquid cooling device to solve the problem that sudden acceleration changes in mobile devices during operation cause power components to be intermittently exposed to the liquid surface of the working fluid, which in turn makes the power components prone to local overheating or even dry burning.

[0006] The full-condition immersion liquid cooling device provided in this application includes an evaporation section, a condensation section, a mounting bracket, and a liquid absorbent core coating layer. The evaporation section has an evaporation chamber filled with a liquid working fluid. One end of the mounting bracket is installed on the bottom wall of the evaporation chamber, and the other end is supported on the side of the power element near the bottom wall of the evaporation chamber. A portion of the liquid absorbent core coating layer covers at least a portion of the outer surface of the power element, and another portion of the liquid absorbent core covers at least a portion of the outer surface of the mounting bracket. The liquid absorbent core coating layer extends from the upper end face of the power element to the end of the mounting bracket near the bottom wall of the evaporation chamber, so that the liquid working fluid at the bottom of the evaporation chamber can be adsorbed onto the outer surface of the power element through the liquid absorbent core coating layer. The liquid working fluid in the liquid absorbent core coating layer can absorb heat and vaporize into a gaseous working fluid and enter the condensation section. The gaseous working fluid can release heat and liquefy into a liquid working fluid in the condensation section and flow back to the evaporation section.

[0007] In one embodiment, the full-condition immersion liquid cooling device further includes a sealing flange and an external connector. The side wall of the evaporation section is provided with a first mounting hole, the sealing flange is sealed at the first mounting hole, and the external connector is sealed through the sealing flange to electrically connect the power element and external components.

[0008] In one embodiment, the external connector includes an internal connecting line and an external connecting line. The sealing flange includes a flange plate and a conductive post. The flange plate and the first mounting hole are sealed together. The conductive post is sealed through the flange plate. One end of the conductive post extends out of the inner wall of the evaporation chamber to form an inner protrusion, and the other end extends out of the outer wall of the evaporation chamber to form an outer protrusion. One end of the internal connecting line is electrically connected to the power element, and the other end is electrically connected to the inner protrusion. One end of the external connecting line is electrically connected to the external component, and the other end is electrically connected to the outer protrusion.

[0009] In one embodiment, the flange is threaded to the inner wall of the first mounting hole, or the flange is welded to the inner wall of the first mounting hole.

[0010] In one embodiment, when the mounting bracket is horizontally positioned, the upper surface of the power element is immersed in the liquid working fluid. The upper end of the mounting bracket is provided with a first connecting hole, and the bottom surface of the power element can be immersed in the liquid working fluid through the first connecting hole. The side of the mounting bracket is provided with a second connecting hole that penetrates itself. After the liquid working fluid at the first connecting hole absorbs heat and vaporizes, it can escape from the inner cavity of the mounting bracket through the second connecting hole and rise into the condensation section.

[0011] In one embodiment, the area M of the first connecting hole and the bottom area N of the power element satisfy 0.1≤M / N≤0.9.

[0012] In one embodiment, the mounting bracket includes an upper frame structure and a plurality of support legs located below the frame structure. The mounting bracket is connected to the bottom wall of the evaporation chamber via the support legs. A first connecting hole is located at the center of the frame structure, and the frame structure and two adjacent support legs enclose a second connecting hole.

[0013] In one embodiment, the full-condition immersion liquid cooling device further includes a liquid-absorbing core base plate, which covers the bottom wall of the evaporation chamber and is connected to the liquid-absorbing core covering layer.

[0014] In one embodiment, the full-condition immersion liquid cooling device further includes a liquid-absorbing core side plate, which covers the side wall of the evaporation chamber and is connected to the liquid-absorbing core bottom plate.

[0015] In one embodiment, the absorbent core coating layer has a double-layer structure, with the inner layer being a metal fiber layer and the outer layer being a non-metallic porous layer. The metal fiber layer is attached to the outer surface of the power component and the mounting bracket.

[0016] Compared to existing technologies, the full-condition immersion liquid cooling device provided in this application utilizes the porous nature of the wick coating layer to adsorb the liquid working fluid when it is at the bottom of the evaporation chamber. The fluid is then transported to the upper part of the power element via a path covering the surfaces of the power element and mounting bracket. After absorbing heat on the power element surface, the liquid working fluid vaporizes, and the resulting gaseous working fluid rises into the condensation section, releasing latent heat and re-liquefying. The liquefied working fluid then flows back to the bottom of the evaporation chamber by gravity or capillary action, forming a closed loop. The mounting bracket not only provides physical support, but its wick coating layer further expands the working fluid transport channel, ensuring that the working fluid remains covered even when the mobile equipment is tilted or vibrates.

[0017] Compared to existing technologies, this solution establishes an active working fluid delivery mechanism through a liquid-absorbing wick coating layer. Even during sudden acceleration changes, it maintains the wetness of the power component surface through capillary action, effectively solving the problem of partial exposure of power components during dynamic operation of mobile devices. This ensures that the power component surface is always covered by the working fluid, avoiding the risk of dry burning. Furthermore, the integrated design of the mounting bracket and the liquid-absorbing wick coating layer enhances the stability of the liquid working fluid transport path, preventing channel interruptions caused by structural deformation.

[0018] Furthermore, the gas-liquid phase change cycle of the working fluid does not rely on external pumping devices, enabling efficient and autonomous operation of the immersion liquid cooling device under all operating conditions. Attached Figure Description

[0019] 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.

[0020] Figure 1 A schematic diagram of the structure of a full-condition immersion liquid cooling device according to an embodiment of this application;

[0021] Figure 2 An exploded view of a full-condition immersion liquid cooling device according to an embodiment of this application.

[0022] Reference numerals: 100, Evaporation section; 110, Evaporation chamber; 120, First mounting hole; 200, Condensation section; 210, Condensation channel; 220, Outer fins; 300, Mounting bracket; 310, Frame structure; 320, Support foot; 321, Second connecting hole; 410, Liquid absorbent core coating layer; 420, Liquid absorbent core base plate; 500, Sealing flange; 510, Flange plate; 520, Conductive post; 521, Outer protrusion; 600, Power element. Detailed Implementation

[0023] Please see Figure 1 and Figure 2 In one embodiment, the full-condition immersion liquid cooling device adopts a heat pipe structure. Specifically, the full-condition immersion liquid cooling device includes an evaporation section 100, a condensation section 200, a mounting bracket 300, and a liquid wick coating layer 410. The evaporation section 100 is provided with an evaporation chamber 110, which is filled with a liquid working fluid. The power element 600 is disposed in the evaporation chamber 110 and immersed in the liquid working fluid. The heat dissipation principle of the power element 600 is that when the power element 600 generates sufficient heat, the heat will cause the liquid working fluid to reach its boiling point. During the phase change, the liquid working fluid vaporizes into a gaseous working fluid. This gaseous working fluid then rises from the evaporation section 100 into the condensation section 200. The condensation section 200 has multiple spaced-apart condensation channels 210, with external fins 220 positioned between adjacent condensation channels 210. After entering each condensation channel 210, the gaseous working fluid transfers heat to the external fins 220. The heat from the external fins 220 is primarily transferred to the atmosphere via air cooling, thus completing the heat transfer process of the power element 600. Furthermore, after releasing heat, the gaseous working fluid re-condenses into a liquid working fluid. The condensed liquid working fluid then flows back into the evaporation chamber 110 under gravity, completing one cycle of heat dissipation for the working fluid.

[0024] Furthermore, it should be noted that the power element 600 connects to external components via external connectors. For example, when the power element 600 is a battery, the external connector is a cable. In this case, one end of the cable is connected to the battery, and the other end is connected to an electrical component such as a motor outside the evaporation section 100. When the power element 600 is a battery cell, the external connector is a data cable. In this case, one end of the data cable is connected to the battery cell, and the other end is connected to a device to be controlled outside the evaporation section 100. When the power element 600 is a motor, the external connectors are a power transmission line and the motor's output shaft. One end of the power transmission line is connected to the motor, and the other end is connected to a power source outside the evaporation section 100. One end of the output shaft is fixedly connected to the motor's rotor, and the other end is connected to the device to be driven. Obviously, the power element 600 will always connect to external components via external connectors during operation. Therefore, for the sealing of the evaporation chamber 110, the external connectors are all sealed through the side wall of the evaporation chamber 110.

[0025] Specifically, in one embodiment, the full-condition immersion liquid cooling device further includes external connectors (not shown), a sealing flange 500, and a sealing shaft (not shown). The side wall of the evaporation section 100 is provided with a first mounting hole 120 and a second mounting hole (not shown). The sealing flange 500 is sealed at the first mounting hole 120. External connectors such as cables, power transmission lines, or data cables pass through the sealing flange 500 to electrically connect the power element 600 and external components. The sealing shaft is located at the second mounting hole, and the motor output shaft passes through the sealing shaft to connect to an external drive component.

[0026] It should be noted that the sealing flange 500 and the sealing shaft do not necessarily need to be installed simultaneously. The sealing shaft is only required when a motor is present. Furthermore, the number of power components 600 can be one or more; the specific numbers are not listed here.

[0027] Furthermore, in one embodiment, the external connector includes an internal connecting line (not shown) and an external connecting line (not shown). The sealing flange 500 includes a flange plate 510 and a conductive post 520. The flange plate 510 and the first mounting hole 120 are sealed together. The sealing method can be a detachable connection such as a threaded connection, or a non-detachable connection such as welding. The flange plate 510 and the first mounting hole 120 are fixed by threads or welding to ensure the sealing of the evaporation chamber 110. The conductive post 520 is sealed through the flange plate 510. One end of the conductive post 520 extends out of the inner wall of the evaporation chamber 110 to form an inner protrusion (not shown), and the other end extends out of the outer wall of the evaporation chamber 110 to form an outer protrusion 521. One end of the internal connecting line is electrically connected to the power element 600, and the other end is electrically connected to the inner protrusion of the conductive post 520. One end of the external connecting line is electrically connected to the external component, and the other end is electrically connected to the outer protrusion 521, so that the power element 600 is electrically connected to the external component in sequence through the internal connecting line, the conductive post 520 and the external connecting line.

[0028] The conductive post 520 is sealed on the flange plate 510 using a rubber sealing ring or epoxy resin filling process to prevent leakage of liquid working fluid along the conductive post 520. The internal connecting wires are connected to the inner protrusion of the conductive post 520 by welding or crimping, while the external connecting wires are connected to the outer protrusion 521 of the conductive post 520 by plug-in or bolt fixing. Thus, the current from the power element 600 is transmitted to the conductive post 520 through the internal connecting wires, and then to external components through the external connecting wires, forming a complete conductive circuit.

[0029] It should be noted that in this embodiment, the external connector achieves indirect connection between the power element 600 and external components through the conductive post 520. In other embodiments, the power element 600 can be directly connected to external components through the external connector.

[0030] It should be noted that the liquid working fluid is an insulating coolant, that is, the liquid working fluid is electrically insulating. Specifically, the liquid working fluid includes, but is not limited to, pure water without impurities, pure ethanol, insulating oil, and fluorinated liquid.

[0031] Thus, this solution achieves physical separation and modular connection of internal and external circuits through separate internal and external connecting wires, in conjunction with a flange plate 510 with conductive posts 520. This ensures reliable sealing while facilitating the individual replacement of internal or external connecting wires. Furthermore, the inner and outer protrusions 521 of the conductive posts 520 prevent direct contact between the wires and the flange plate 510, reducing loosening of connections due to vibration.

[0032] Furthermore, in one embodiment, the flange plate 510 is an injection molded part, and the conductive post 520 is a metal part, which is inserted into the flange plate 510 by injection molding.

[0033] However, not limited to this, in another embodiment, both the flange plate 510 and the conductive post 520 are metal parts, and the conductive post 520 is welded to the flange plate 510.

[0034] It should be noted that the sidewalls of the evaporation section 100 are made of insulating materials such as plastic.

[0035] One end of the mounting bracket 300 is mounted on the bottom wall of the evaporation chamber 110, and the other end is supported on the side of the power element 600 near the bottom wall of the evaporation chamber 110. That is, the power element 600 is mounted on the top of the mounting bracket 300 (the end away from the bottom wall of the evaporation chamber 110). Furthermore, the power element 600 can be detachably connected to the mounting bracket 300 by fasteners (including but not limited to screws, bolts, and clips). The power element 600 can also be connected to the mounting bracket 300 by magnetic attachment. This prevents the power element 600 from detaching from the mounting bracket 300 and causing damage when the mobile device experiences sudden acceleration changes.

[0036] Furthermore, when the mounting bracket 300 is horizontally positioned, the upper surface of the power element 600 is immersed in the liquid working medium. The top of the mounting bracket 300 (the end furthest from the bottom wall of the evaporation chamber 110) is provided with a first connecting hole (not shown). The surface of the power element 600 near the bottom wall of the evaporation chamber 110 can be immersed in the liquid working medium through the first connecting hole. This allows the bottom surface of the power element 600 corresponding to the first connecting hole (the end face near the bottom wall of the evaporation chamber 110) to be immersed in the liquid working medium, preventing localized overheating of the bottom surface of the power element 600. It is understood that the first connecting hole is preferably located at the bottom surface of the power element 600 where the heat generation is highest.

[0037] The horizontal setting of the mounting bracket 300 means that the mounting bracket 300 is in a state perpendicular to the direction of gravity. This can be achieved by using a metal frame in conjunction with a horizontal calibration structure to ensure that the power element 600 maintains stable support under dynamic operating conditions. The first connecting hole refers to the through channel located at the upper end of the mounting bracket 300. This can be achieved by using a circular, rectangular, or irregularly shaped hole structure to allow the liquid working fluid to rise from the bottom of the evaporation chamber 110 to the bottom surface of the power element 600.

[0038] Furthermore, in one embodiment, the area M of the first connecting hole and the bottom area N of the power element 600 satisfy 0.1≤M / N≤0.9.

[0039] The area of ​​the first connecting hole refers to the projected area of ​​the hole opened at the upper end of the mounting bracket 300 in the horizontal direction. Specifically, it can be realized by adopting a circular, rectangular or irregular structure. Its area affects the flow efficiency of the liquid working fluid and the escape speed of the gasified working fluid.

[0040] The bottom area of ​​power element 600 refers to the horizontal projected area of ​​the contact surface between power element 600 and mounting bracket 300. It can be determined by measuring the installation dimensions of power element 600. This parameter is directly related to the working fluid coverage area and heat conduction efficiency.

[0041] Specifically, when the mounting bracket 300 is horizontally positioned, the liquid working fluid contacts the bottom surface of the power element 600 through the first connecting hole. When the area ratio M / N is less than 0.1, the insufficient supply of liquid working fluid results in a limited vaporization rate; when the area ratio exceeds 0.9, the support strength of the mounting bracket 300 decreases. By constraining the area ratio within the range of 0.1 to 0.9, a continuous supply of liquid working fluid required for vaporization can be maintained, thereby improving the support strength of the mounting bracket 300.

[0042] However, this is not the only embodiment. In another embodiment, the first connecting hole may be larger than the power element 600, and a support mesh is provided at the first connecting hole to prevent the power element 600 from falling.

[0043] Furthermore, the side of the mounting bracket 300 is provided with a second through hole 321 that penetrates through itself. The second through hole 321 connects to the first through hole. At this time, the liquid working fluid inside the mounting bracket 300 can connect to the liquid working fluid outside the mounting bracket 300 through the second through hole 321. Moreover, after the liquid working fluid at the first through hole absorbs heat and vaporizes, it can escape from the inner cavity of the mounting bracket 300 through the second through hole 321 and rise into the condensation section 200.

[0044] It should be noted that when the mounting bracket 300 has multiple sides, one or more second connecting holes 321 can be provided on each side to facilitate the rapid escape of the gaseous working medium from the interior of the mounting bracket 300.

[0045] The second connecting hole 321 refers to the through channel located on the side of the mounting bracket 300. Specifically, it can be implemented using a mesh-like, strip-like, or porous structure to provide an upward escape path for the gaseous working fluid.

[0046] This solution constructs a stable working fluid flow path by setting the first connecting hole and the second connecting hole 321, maintaining the continuous coverage of the power element 600 by the liquid working fluid during sudden acceleration changes, while avoiding the accumulation of gaseous working fluid in the confined space to form thermal resistance.

[0047] Specifically, in one embodiment, the mounting bracket 300 includes a frame structure 310 located at the upper part (the end away from the bottom wall of the evaporation chamber 110) and a plurality of support feet 320 located below the frame structure 310. The mounting bracket 300 is connected to the bottom wall of the evaporation chamber 110 through the support feet 320. A first connecting hole is provided at the center of the frame structure 310. The specific shape of the first connecting hole corresponds to the shape of the power element 600. The frame structure 310 and two adjacent support feet 320 surround to form a second connecting hole 321. When the number of support feet 320 is four, the number of second connecting holes 321 is also four, and so on.

[0048] Thus, when the mounting bracket 300 is set horizontally, the power element 600 is fixed to the upper surface of the frame structure 310, and the support foot 320 raises the frame structure 310 to a certain height, forming a space between the bottom surface of the power element 600 and the bottom wall of the evaporation chamber 110 to accommodate the liquid working fluid. The first connecting hole at the center of the frame structure 310 allows the liquid working fluid to directly contact the bottom surface of the power element 600, while the second connecting hole 321 formed by the support foot 320 and the frame structure 310 provides a lateral flow channel for the gaseous working fluid.

[0049] However, it is not limited to this. In other embodiments, the mounting bracket 300 can also be a structure with only four support columns. One end of the four support columns is connected to the bottom wall of the evaporation chamber 110, and the other end is connected to the power element 600. In this way, the structure of the mounting bracket 300 is simpler, which is conducive to increasing the contact area between the power element 600 and the liquid working fluid, and reducing the weight of the entire full-condition immersion liquid cooling device, thus achieving its lightweight design.

[0050] A portion of the wicking layer 410 covers at least a portion of the outer surface of the power element 600, and another portion covers at least a portion of the outer surface of the mounting bracket 300. The wicking layer 410 extends from the upper surface of the power element 600 to the end of the mounting bracket 300 near the bottom wall of the evaporation chamber 110, allowing the liquid working fluid at the bottom of the evaporation chamber 110 to be adsorbed onto the outer surface of the power element 600 through the wicking layer 410. Thus, even if a sudden acceleration of the mobile device causes a portion of the power element 600 to expose the liquid working fluid, the surface of the power element 600 can maintain continuous contact with the liquid working fluid through the wicking layer 410, preventing overheating damage to the exposed portion of the power element 600.

[0051] It should be noted that the wicking layer 410 can absorb a large amount of liquid working fluid, just like a sponge, so that the liquid working fluid and the surface of the power element 600 can maintain contact for a long time. Specifically, the wicking layer 410 can be sintered powder metal, sponge, or other loose and porous structures. The wicking layer 410 generates capillary pressure through the porous structure of the material itself, so that after the liquid working fluid in the wicking layer 410 evaporates when heated, the remaining liquid working fluid can rise from the bottom of the evaporation section 100 to the top of the power element 600 under the action of capillary pressure, so as to facilitate the cyclic heat dissipation of the power element 600.

[0052] It should be noted that the external connector is inserted through the absorbent core covering layer 410.

[0053] Furthermore, it should be noted that, under operating conditions, after the liquid working fluid has filled the liquid-absorbing core coating layer 410 in the evaporation chamber 110, there is still a surplus that can submerge the upper surface of the power element 600.

[0054] In summary, specifically, when the liquid working fluid is at the bottom of the evaporation chamber 110, the wicking layer 410 utilizes its porous nature to adsorb the liquid working fluid and transports it to the upper part of the power element 600 through a path covering the surfaces of the power element 600 and the mounting bracket 300. After absorbing heat on the surface of the power element 600, the liquid working fluid vaporizes, and the resulting gaseous working fluid rises into the condensation section 200, releasing latent heat through heat dissipation and re-liquefying. The liquefied working fluid then flows back to the bottom of the evaporation chamber 110 by gravity or capillary action, forming a closed loop. The mounting bracket 300 not only provides physical support, but its wicking layer 410 further expands the working fluid transport channel, ensuring that the working fluid remains covered even when the mobile equipment is tilted or vibrates.

[0055] Compared with existing technologies, this solution establishes an active working fluid delivery mechanism through the liquid-absorbing core coating layer 410. Even during sudden acceleration changes, it can maintain the surface of the power element 600 in a moist state through capillary action, thus effectively solving the problem of partial exposure of the power element 600 during dynamic operation of mobile devices. This ensures that the surface of the power element 600 is always covered by the working fluid, avoiding the risk of dry burning. In addition, the integrated design of the mounting bracket 300 and the liquid-absorbing core coating layer 410 enhances the stability of the liquid working fluid delivery path and avoids channel interruption caused by structural deformation.

[0056] Furthermore, the gas-liquid phase change cycle of the working fluid does not rely on external pumping devices, enabling efficient and autonomous operation of the immersion liquid cooling device under all operating conditions.

[0057] In one embodiment, the full-condition immersion liquid cooling device further includes a liquid-absorbing core base plate 420, which covers the bottom wall of the evaporation chamber 110 and is connected to the liquid-absorbing core covering layer 410.

[0058] Specifically, the wick base plate 420 is positioned behind the bottom wall of the evaporation chamber 110, forming a continuous capillary network with the wick coating layer 410 that surrounds the power element 600. When the device is tilted or experiences a sudden acceleration, the liquid working fluid at the bottom of the evaporation chamber 110 is continuously lifted by the capillary force of the wick base plate 420 and transported upwards along the wick coating layer 410 at the connection interface, covering the heating surface of the power element 600. This structural design enhances the self-compensation capability of the working fluid under unsteady conditions, preventing interruptions in the working fluid supply due to liquid level fluctuations.

[0059] In one embodiment, the full-condition immersion liquid cooling device further includes a liquid-absorbing core side plate (not shown), which covers the side wall of the evaporation chamber 110 and is connected to the liquid-absorbing core bottom plate 420.

[0060] Specifically, the liquid-absorbing core side plate and the liquid-absorbing core bottom plate 420 are seamlessly connected through physical contact or welding, establishing a capillary channel network between the side wall and bottom wall of the evaporation chamber 110. When the device is affected by dynamic acceleration, causing the liquid working fluid surface to tilt, the liquid-absorbing core side plate uses capillary action to adsorb the liquid working fluid at the bottom upwards along the side wall, maintaining the liquid film coverage of the side wall area and preventing the contact area between the power element 600 and the side wall of the evaporation chamber 110 from being exposed due to the lag in the flow of the working fluid.

[0061] Furthermore, in one embodiment, the liquid-absorbing core side plate and the power element 600 are spaced 5mm-30mm apart.

[0062] In one embodiment, the absorbent core covering layer 410 has a double-layer structure. The inner layer of the absorbent core covering layer 410 is a metal fiber layer (such as copper fiber or aluminum fiber), and the outer layer of the absorbent core covering layer 410 is a non-metallic porous layer (such as ceramic or carbon fiber). The metal fiber layer is attached to the outer surface of the power element 600 and the mounting bracket 300, and the non-metallic porous layer is disposed on the side of the absorbent core covering layer 410 away from the power element 600 or the mounting bracket 300.

[0063] Specifically, under dynamic operating conditions of mobile devices, when the liquid working fluid undergoes unsteady flow due to sudden acceleration changes, the metal fiber layer maintains contact stability with the surface of the power element 600 through its rigid structure, ensuring the basic heat conduction path; the non-metallic porous layer continuously adsorbs the liquid working fluid at the bottom of the evaporation chamber 110 through capillary action, forming a continuous liquid film on the surface of the metal fiber layer. With the synergistic effect of the dual-layer structure, even if a portion of the power element 600 temporarily detaches from the liquid working fluid, the adsorbed liquid film can still maintain the cooling effect.

[0064] Compared to existing technologies, current single-layer wick structures are prone to insufficient adsorption capacity or structural deformation under dynamic operating conditions due to the uniformity of materials. For example, pure metal wicks are prone to liquid film breakage when the working fluid wettability is insufficient, while pure non-metallic wicks cannot maintain stable contact due to insufficient rigidity. This solution uses a double-layer heterogeneous material stack, which retains the thermal conductivity and support properties of metallic materials while utilizing non-metallic materials to optimize liquid transport capacity, forming a complementary effect.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] 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.

[0067] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do 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 a limitation of this application.

[0068] 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.

[0069] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0070] 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 is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply 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 that the first feature is at a lower horizontal level than the second feature.

[0071] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0072] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of 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 herein includes any and all combinations of one or more of the associated listed items.

Claims

1. A full duty immersed liquid cooling device, characterized in that, It includes an evaporation section (100), a condensation section (200), a mounting bracket (300), and a liquid-absorbing core coating layer (410). The evaporation section (100) is provided with an evaporation chamber (110), which is filled with a liquid working fluid. One end of the mounting bracket (300) is installed on the bottom wall of the evaporation chamber (110), and the other end is supported on the side of the power element (600) near the bottom wall of the evaporation chamber (110). A portion of the wick coating (410) covers at least a portion of the outer surface of the power element (600), and another portion of the wick covers at least a portion of the outer surface of the mounting bracket (300). The wick coating (410) extends from the upper end face of the power element (600) to one end of the mounting bracket (300) near the bottom wall of the evaporation chamber (110), so that the liquid working fluid at the bottom of the evaporation chamber (110) can be adsorbed onto the outer surface of the power element (600) through the wick coating (410). The liquid working fluid in the liquid-absorbing core coating layer (410) can absorb heat and vaporize into a gaseous working fluid and enter the condensation section (200). The gaseous working fluid can release heat and liquefy into a liquid working fluid in the condensation section (200) and flow back to the evaporation section (100).

2. The full-mission immersed liquid cooling device according to claim 1, characterized in that, It also includes a sealing flange (500) and an external connector. The side wall of the evaporation section (100) is provided with a first mounting hole (120). The sealing flange (500) is sealed at the first mounting hole (120). The external connector is sealed through the sealing flange (500) to electrically connect the power element (600) and external components.

3. The full-condition immersion liquid cooling device according to claim 2, characterized in that, The external connector includes an internal connection line and an external connection line. The sealing flange (500) includes a flange plate (510) and a conductive post (520). The flange plate (510) and the first mounting hole (120) are sealed together. The conductive post (520) is sealed through the flange plate (510). One end of the conductive post (520) extends out of the inner wall of the evaporation chamber (110) to form an inner protrusion, and the other end extends out of the outer wall of the evaporation chamber (110) to form an outer protrusion (521). One end of the internal connection line is electrically connected to the power element (600), and the other end is electrically connected to the inner protrusion. One end of the external connection line is electrically connected to the external component, and the other end is electrically connected to the outer protrusion (521).

4. The full-mission immersed liquid cooling device according to claim 3, characterized in that, The flange plate (510) is threaded to the inner wall of the first mounting hole (120), or the flange plate (510) is welded to the inner wall of the first mounting hole (120).

5. The full-mission immersed liquid cooling device according to claim 1, characterized in that, When the mounting bracket (300) is set horizontally, the upper end face of the power element (600) is immersed in the liquid working medium. The upper end of the mounting bracket (300) is provided with a first connecting hole, and the bottom surface of the power element (600) can be immersed in the liquid working medium through the first connecting hole. The side of the mounting bracket (300) is provided with a second connecting hole (321) that penetrates itself. After the liquid working medium at the first connecting hole absorbs heat and vaporizes, it can escape from the inner cavity of the mounting bracket (300) through the second connecting hole (321) and rise into the condensation section (200).

6. The full-mission immersed liquid cooling device according to claim 5, characterized in that, The area M of the first connecting hole and the bottom area N of the power element (600) satisfy 0.1≤M / N≤0.

9.

7. The full-mission immersed liquid cooling device according to claim 5, characterized in that, The mounting bracket (300) includes an upper frame structure (310) and a plurality of support legs (320) below the frame structure (310). The mounting bracket (300) is connected to the bottom wall of the evaporation chamber (110) through the support legs (320). The first connecting hole is located at the center of the frame structure (310). The frame structure (310) and two adjacent support legs (320) surround and form the second connecting hole (321).

8. The full-mission immersed liquid cooling device according to claim 1, characterized in that, It also includes a liquid-absorbing core base plate (420), which covers the bottom wall of the evaporation chamber (110) and is connected to the liquid-absorbing core covering layer (410).

9. The full-mission immersed liquid cooling device according to claim 8, characterized in that, It also includes a liquid-absorbing core side plate, which covers the side wall of the evaporation chamber (110) and is connected to the liquid-absorbing core bottom plate (420).

10. The full-condition immersion liquid cooling device according to claim 1, characterized in that, The absorbent core coating layer (410) has a double-layer structure. The inner layer of the absorbent core coating layer (410) is a metal fiber layer, and the outer layer of the absorbent core coating layer (410) is a non-metallic porous layer. The metal fiber layer is attached to the outer surface of the power element (600) and the mounting bracket (300).

Images