Heat pipe heat exchanger

Abstract

The application relates to a heat pipe heat exchange device, which comprises an evaporation section, a condensation section, a variable liquid storage part, a liquid absorbing core and a liquid absorbing spraying assembly. The variable liquid storage part is arranged in the evaporation section, the volume of the variable liquid storage part is adjustable, so that the volume ratio of the liquid working medium in the variable liquid storage part to the volume of the variable liquid storage part is kept greater than a preset ratio; at least part of the liquid absorbing core is arranged in the lower area of the evaporation section along the direction of gravity, so as to absorb the liquid working medium flowing back to the evaporation section from the condensation section; a power element is arranged in the evaporation section, and the liquid working medium can be sequentially transferred between the liquid absorbing core, the variable liquid storage part and the heating surface of the power element through the liquid absorbing spraying assembly. The heat pipe heat exchange device provided by the application solves the problem that the existing mobile machinery has a dry burning risk when adopting the immersion type phase change heat exchange technology.

Description

Technical Field

[0001] This application relates to the field of submersible heat exchanger technology, and in particular to a heat pipe heat exchanger. Background Technology

[0002] In the actual operation of mobile machinery such as humanoid robots and low-altitude aircraft, the equipment frequently faces various dynamic attitude changes, including tilting, rolling, acceleration, and deceleration. These conditions make it difficult for traditional immersion phase change cooling systems to maintain a stable liquid working fluid coverage of power components, exposing parts of the power components to the gaseous environment. This leads to a sharp increase in local temperature, causing dry burning and seriously threatening the safety and service life of the equipment. Furthermore, even with spray phase change cooling technology, the liquid pump is prone to drawing in gaseous working fluid during attitude changes, resulting in cavitation failure, interruption of coolant supply, and a significant decrease in system heat dissipation efficiency, failing to meet the reliable thermal management requirements of mobile machinery under complex operating conditions. Summary of the Invention

[0003] Therefore, it is necessary to provide a heat pipe heat exchange device to solve the problem of dry burning risk when existing mobile machinery adopts immersion phase change heat exchange technology.

[0004] The heat pipe heat exchange device provided in this application includes an evaporation section, a condensation section, a variable liquid storage section, a liquid suction core, and a liquid suction spray assembly. The variable liquid storage section is disposed within the evaporation section, and its volume is adjustable so that the ratio of the volume of the liquid working fluid in the variable liquid storage section to the volume of the variable liquid storage section is maintained greater than a preset ratio. At least a portion of the liquid suction core is disposed in the lower region of the evaporation section along the direction of gravity to absorb the liquid working fluid flowing back from the condensation section to the evaporation section. The power element is disposed in the evaporation section, and the liquid working fluid can be sequentially transferred between the liquid suction core, the variable liquid storage section, and the heating surface of the power element through the liquid suction spray assembly.

[0005] In one embodiment, the sidewall of the variable liquid storage section is a flexible structure, and when there is a pressure difference between the internal space of the variable liquid storage section and the internal space of the evaporation section, the pressure difference can drive the variable liquid storage section to undergo reversible deformation to adjust the volume of the variable liquid storage section.

[0006] In one embodiment, the heat pipe heat exchange device further includes a limiting component, which and one side wall of the evaporation section are respectively clamped at both ends of the variable liquid storage section to limit the maximum volume of the variable liquid storage section.

[0007] In one embodiment, the limiting component includes a limiting cage that surrounds the outer periphery of the variable liquid reservoir.

[0008] In one embodiment, the limiting component includes a limiting rod, one end of which is connected to the inner wall of the evaporation section, and the other end is bent and stopped on the side of the variable liquid storage section away from the wall of the evaporation section.

[0009] In one embodiment, the limiting component includes a plurality of limiting blocks, which are fixedly connected to the inner wall of the evaporation section and stop the variable liquid storage section on the side away from the wall of the evaporation section.

[0010] In one embodiment, the liquid suction spray assembly includes a liquid suction section and a liquid supply section. The liquid suction section includes a liquid suction pump and a liquid suction pipe assembly. The liquid suction pump can draw liquid working fluid from the liquid suction core through the liquid suction pipe assembly and deliver it to the variable liquid storage section. The liquid supply section includes a liquid supply pump and a liquid supply pipe assembly. The liquid supply pump can draw liquid working fluid from the variable liquid storage section through the liquid supply pipe assembly and spray it onto the heating surface of the power element.

[0011] In one embodiment, the pumping flow rate of the suction section is greater than or equal to the pumping flow rate of the supply section.

[0012] In one embodiment, the suction pump and the supply pump are immersed in the liquid working fluid disposed in the variable reservoir.

[0013] In one embodiment, the suction pump and the supply pump are disposed in the space between the evaporation section and the variable storage section.

[0014] In one embodiment, the liquid suction core includes a continuously extending and interconnected liquid suction section and a negative pressure generating section. At least a portion of the outer surface of the liquid suction section is connected to the evaporation section to absorb the liquid working fluid returning from the evaporation section. The heat pipe heat exchange device also includes a sealing plate. The sealing plate surrounds and seals the outer surface of the negative pressure generating section, or the sealing plate and the inner wall of the evaporation section cooperate to seal the outer surface of the negative pressure generating section. One end of the liquid suction tube assembly is inserted into the interior of the negative pressure generating section so that when the liquid suction pump is running, the negative pressure generating section can generate a negative pressure environment and absorb the liquid working fluid in the liquid suction section.

[0015] In one embodiment, the inlet of the suction pipe assembly is provided with a filter screen, and the supply pipe assembly includes one or more sections of bent pipe, with at least a portion of the inner wall of the bent pipe having an exhaust hole so that the gaseous working fluid can be discharged from the supply pipe assembly through the exhaust hole.

[0016] In one embodiment, the suction core includes multiple spaced negative pressure generating sections, the number of suction tube groups and the number of negative pressure generating sections are set in a one-to-one correspondence, and each suction tube group is inserted into the corresponding negative pressure generating section.

[0017] In one embodiment, the liquid suction part further includes an extension tube, one end of which is connected to the opening of the liquid suction tube assembly inserted into the liquid suction core, and the other end extends inside the liquid suction core. Furthermore, the side wall of the extension tube is provided with a plurality of through holes that communicate with the liquid suction core.

[0018] In one embodiment, the inner wall of the evaporation section is provided with a groove, and the liquid-absorbing core is filled in the groove.

[0019] Compared with existing technologies, the heat pipe heat exchanger provided in this application maintains a near-saturated state of almost full liquid in the variable liquid reservoir regardless of the orientation of the heat pipe heat exchanger, virtually eliminating the possibility of gas entering the liquid supply channel. Even if the heat pipe heat exchanger is inverted or tilted, the variable liquid reservoir can still provide the downstream liquid suction spray assembly with pure liquid working fluid free of bubbles, avoiding liquid supply interruption due to the intake of gaseous working fluid.

[0020] Furthermore, the wick actively captures and fixes the refluxed liquid working fluid using capillary force, overcoming the influence of gravity vector changes on the liquid convergence position. Regardless of the device's orientation, as long as the refluxed liquid contacts the wick portion located in the lower region of the current orientation, the liquid is effectively captured and temporarily stored by the capillary structure, providing a stable "liquid source" for the wicking spray assembly. The variable liquid storage section has an adjustable volume, adapting to changes in the working fluid's phase change volume under different heat loads (e.g., increased vapor and decreased liquid under high heat loads), preventing a large amount of liquid working fluid from being ineffectively retained at the bottom of the evaporation section and affecting the vapor space. Moreover, the liquid working fluid can be sequentially transferred between the wick, the variable liquid storage section, and the heating surface of the power element through the wicking spray assembly, realizing a forced circulation channel independent of gravity reflux.

[0021] Furthermore, the heat pipe heat exchange device of this application precisely sprays liquid working fluid onto the heating surface of the power element through a liquid suction spray assembly, utilizing the latent heat of vaporization of the working fluid to directly remove heat. Compared to traditional immersion heat exchangers that rely on natural convection or boiling, the forced spraying in this solution can significantly increase the critical heat flux density, reduce the heat transfer temperature difference, and result in a lower junction temperature for the power element.

[0022] In summary, the heat pipe heat exchange device of this application, by incorporating a variable liquid storage section, can dynamically adjust its volume to maintain the liquid working fluid in a near-full state, thereby preventing the liquid pump from cavitating under complex attitude changes of mobile machinery (such as humanoid robots and low-altitude aircraft). Simultaneously, the liquid suction core is located in the lower region of the evaporation section, ensuring the return and supply of the liquid working fluid, thus guaranteeing continuous cooling of the power components under various operating conditions and preventing localized dry burning. Attached Figure Description

[0023] 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.

[0024] Figure 1 A schematic diagram of the structure of a heat pipe heat exchange device according to an embodiment of this application;

[0025] Figure 2 A cross-sectional view of a heat pipe heat exchange device according to an embodiment of this application;

[0026] Figure 3 A partial structural schematic diagram of a heat pipe heat exchange device according to an embodiment of this application;

[0027] Figure 4 A partial structural schematic diagram of a heat pipe heat exchange device according to another embodiment of this application;

[0028] Figure 5 A partial structural schematic diagram of a heat pipe heat exchange device according to another embodiment of this application;

[0029] Figure 6 A partial structural schematic diagram of a heat pipe heat exchange device according to another embodiment of this application;

[0030] Figure 7 A partial cross-sectional view of a heat pipe heat exchange device according to an embodiment of this application.

[0031] Reference numerals: 100, Evaporation section; 200, Condensation section; 210, Condensation channel; 220, Outer fins; 300, Variable liquid storage section; 310, Top plate; 320, Bottom plate; 330, Flexible sleeve; 400, Liquid suction core; 410, Liquid suction section; 420, Negative pressure generating section; 430, Sealing plate; 500, Liquid suction spray assembly; 510, Liquid suction section; 511, Liquid suction pump; 512, Liquid suction pipe assembly; 520, Liquid supply section; 521, Liquid supply pump; 522, Liquid supply pipe assembly; 600, Power element; 700, Limiting assembly; 710, Limiting cage; 720, Limiting rod; 730, Limiting block. Detailed Implementation

[0032] Please see Figures 1-7This application discloses a heat pipe heat exchange device, which includes an evaporation section 100, a condensation section 200, a variable liquid storage section 300, a liquid suction core 400, and a liquid suction spray assembly 500. The evaporation section 100 is the area in the heat pipe heat exchange device used to receive heat and vaporize the internal working fluid. Within the evaporation section 100, the liquid working fluid absorbs heat generated by the power element 600 and undergoes a phase change to become a gaseous working fluid. The condensation section 200 is the area in the heat pipe heat exchange device used to release heat and condense the internal working fluid. Within the condensation section 200, the gaseous working fluid transfers heat to the external environment and undergoes a phase change to become a liquid working fluid. The condensation section 200 includes multiple parallel condensation channels 210, each condensation channel 210 connected to the evaporation section 100. External fins 220 are provided between adjacent condensation channels 210, and internal fins (not shown) are provided inside the condensation channels 210. The liquid working fluid is the medium used to transfer heat in the heat pipe heat exchanger. It absorbs heat and vaporizes in the evaporation section 100, and releases heat and condenses in the condensation section 200, achieving heat transfer from the heat source to the heat dissipation end through a phase change cycle. Specifically, the liquid working fluid includes, but is not limited to, water, ammonia, acetone, and environmentally friendly refrigerants (GWP and ODP values ​​meeting PFAS requirements), etc., which will not be listed here. The power element 600 is the electronic device or heat-generating component that needs to be cooled in the heat pipe heat exchanger, such as a battery, IGBT, SiC MOSFET, CPU, GPU, or other high-power chips.

[0033] A variable liquid storage section 300 is disposed within the evaporation section 100. The variable liquid storage section 300 stores liquid working fluid. The volume of the variable liquid storage section 300 is adjustable so that the ratio of the volume of the liquid working fluid within the variable liquid storage section 300 to the volume of the variable liquid storage section 300 is maintained greater than a preset ratio (the preset ratio is greater than or equal to 0.9 and less than or equal to 1, meaning the liquid working fluid within the variable liquid storage section 300 is maintained in a state where it is nearly completely filled). The evaporation section 100 is connected to the condensation section 200. At least a portion of the liquid suction core 400 is disposed in the lower region of the evaporation section 100 along the direction of gravity (including but not limited to the bottom wall and side walls of the evaporation section 100, etc., in different...). In different regions, the liquid working medium is drawn back from the condensation section 200 to the evaporation section 100. The power element 600 is disposed in the evaporation section 100. The liquid working medium can be transferred sequentially between the liquid suction core 400, the variable liquid storage section 300 and the heating surface of the power element 600 by the liquid suction spray assembly 500. That is, the liquid suction spray assembly 500 can draw liquid working medium from the liquid suction core 400 and transport it to the variable liquid storage section 300. In addition, the liquid suction spray assembly 500 can also draw liquid working medium from the variable liquid storage section 300 and spray it onto the heating surface of the power element 600 so that the liquid working medium can absorb heat and vaporize on the heating surface of the power element 600 and enter the condensation section 200.

[0034] Specifically, the variable liquid storage unit 300 is disposed within the internal space of the evaporation section 100, and its main function is to serve as a storage container for the liquid working fluid. The variable liquid storage unit 300 can store a certain amount of liquid working fluid according to system requirements to ensure the operation of the entire heat exchange cycle. The volume of the variable liquid storage unit 300 is designed to be adjustable. For example, the variable liquid storage unit 300 can be a container with flexible walls made of a flexible material that can deform under external force, thereby changing its internal volume. Alternatively, the variable liquid storage unit 300 can include a movable baffle or piston, which can be manually or automatically adjusted by an external mechanical device. By adjusting the volume, the ratio of the liquid working fluid volume in the variable liquid storage unit 300 to the volume of the variable liquid storage unit 300 can always be kept greater than a preset ratio, such as 0.9, thereby ensuring that the variable liquid storage unit 300 is always in a state close to full of liquid working fluid, providing a liquid source for subsequent working fluid delivery. Preferably, the preset ratio is set to a value greater than or equal to 0.9 and less than or equal to 1 to ensure that the variable liquid storage section 300 is always in a state of being nearly full of liquid working fluid, so as to avoid the liquid suction spray assembly 500 from sucking up the air.

[0035] The evaporation section 100 and the condensation section 200 are connected by a vapor channel and a liquid return channel. The gaseous working fluid flows from the evaporation section 100 to the condensation section 200 through the vapor channel, while the condensed liquid working fluid returns to the evaporation section 100 through the liquid return channel, forming a closed working fluid cycle.

[0036] The liquid suction core 400 is at least partially disposed in the lower region of the evaporation section 100 along the direction of gravity. The liquid suction core 400 may be made of a porous material, such as a metal mesh, sintered metal powder, or a fiber structure. Its function is to absorb the liquid working fluid flowing back from the condensation section 200 to the evaporation section 100 and collect it to provide a liquid source for the liquid suction spray assembly 500.

[0037] The power element 600 is disposed within the evaporation section 100 and is in close contact with the inner wall of the evaporation section 100. The heat generated by the power element 600 is transferred to the liquid working fluid within the evaporation section 100 through the heat-conducting interface, causing the liquid working fluid to vaporize.

[0038] The liquid working fluid is sequentially transferred between the suction core 400, the variable liquid storage section 300, and the heating surface of the power element 600 via the liquid suction spray assembly 500. Specifically, the liquid suction spray assembly 500 may include one or more pumps, such as micro pumps, and corresponding suction pipe assemblies 512 and supply pipe assemblies 522. One pump is responsible for drawing the liquid working fluid from the suction core 400 and delivering it to the variable liquid storage section 300. Another pump draws the liquid working fluid from the variable liquid storage section 300 and sprays it onto the heating surface of the power element 600 through nozzles. The liquid working fluid absorbs heat and vaporizes on the heating surface of the power element 600, transforming into a gaseous working fluid, which then enters the condensation section 200 for condensation, completing the entire heat transfer cycle.

[0039] First, in this application, regardless of the orientation of the heat pipe heat exchanger, the variable liquid storage section 300 is always in a near-saturated state, almost completely eliminating the possibility of gas entering the liquid supply channel. Even if the heat pipe heat exchanger is inverted or tilted, the variable liquid storage section 300 can still provide the downstream liquid suction spray assembly 500 with a pure liquid working fluid without bubbles, avoiding liquid supply interruption due to the intake of gaseous working fluid.

[0040] Furthermore, the liquid-absorbing core 400 actively captures and fixes the refluxed liquid working fluid using capillary force, overcoming the influence of gravity vector changes on the liquid convergence position. Regardless of the device's orientation, as long as the refluxed liquid contacts the portion of the liquid-absorbing core 400 located in the lower region of the current orientation, the liquid is effectively captured and temporarily stored by the capillary structure, providing a stable "liquid source" for the liquid-absorbing spray assembly 500. The variable liquid storage section 300 has an adjustable volume, which can adapt to changes in the working fluid's phase change volume under different heat loads (e.g., increased vapor and decreased liquid under high heat loads), preventing a large amount of liquid working fluid from being ineffectively retained at the bottom of the evaporation section 100 and affecting the vapor space. Moreover, the liquid working fluid can be sequentially transferred between the liquid-absorbing core 400, the variable liquid storage section 300, and the heating surface of the power element 600 through the liquid-absorbing spray assembly 500, realizing a forced circulation channel independent of gravity reflux.

[0041] Furthermore, the heat pipe heat exchange device of this application precisely sprays liquid working fluid onto the heating surface of the power element 600 through the liquid suction spray assembly 500, utilizing the latent heat of vaporization of the working fluid to directly remove heat. Compared to traditional immersion heat exchangers that rely on natural convection or boiling, the forced spraying in this solution can significantly increase the critical heat flux density, reduce the heat transfer temperature difference, and result in a lower wall temperature for the power element 600.

[0042] In summary, the heat pipe heat exchange device of this application, by incorporating a variable liquid storage section 300, can dynamically adjust its volume to maintain the liquid working fluid in a near-full state, thereby preventing the liquid pump from sucking up air under complex attitude changes of mobile machinery (such as humanoid robots and low-altitude aircraft). Simultaneously, the liquid suction core 400 is located in the lower region of the evaporation section 100, ensuring the return and supply of the liquid working fluid, thus guaranteeing continuous cooling of the power element 600 under various operating conditions and preventing dry burning. The power element 600 can be one or multiple.

[0043] In one embodiment, this application further proposes that the number of variable liquid storage sections 300 can be multiple, and the multiple variable liquid storage sections 300 are distributed around the power element 600 within the evaporation section 100. This design allows those skilled in the art to flexibly configure the storage and supply points of the liquid working fluid according to the specific shape, size, and heat load distribution of the power element 600. For example, for a large power element 600 or one with multiple hot spots, multiple variable liquid storage sections 300 can be set up and arranged around or dispersed around the power element 600, thereby achieving precise working fluid supply to different areas and ensuring that heat can be absorbed efficiently and uniformly. This distributed layout helps to avoid local overheating or drying out, improving the overall heat exchange efficiency and system stability of the heat pipe heat exchange device.

[0044] Alternatively, in another embodiment, such as Figures 2-6 As shown, the number of variable liquid storage sections 300 can also be one. In this case, a single variable liquid storage section 300 can be located in the middle region of the evaporation section 100, i.e., near the center of the evaporation section 100. This is generally suitable for situations where the heat load is concentrated at the center of the power element 600. Alternatively, the variable liquid storage section 300 can also be located in the peripheral region of the evaporation section 100, i.e., near the edge or sidewall of the evaporation section 100. This is suitable for scenarios where the heat load distribution of the power element 600 is wider or where a specific direction of working fluid supply is required. This flexible arrangement allows the heat pipe heat exchanger to adapt to the geometric characteristics and heat distribution requirements of different power elements 600, optimizing space utilization and improving heat exchange performance.

[0045] In one embodiment, this application further proposes that the sidewalls of the variable liquid reservoir 300 are designed as flexible structures. The flexible structure can be made of various materials, such as, but not limited to, materials with good elasticity and fatigue resistance, such as rubber, silicone, and polymer films. The key point is that the sidewalls are not rigidly fixed, but rather possess the ability to deform under stress, thereby allowing the overall volume of the variable liquid reservoir 300 to change. This flexible design enables the variable liquid reservoir 300 to change its internal space size in response to external or internal driving forces.

[0046] For example, when a pressure difference exists between the internal space of the variable liquid storage section 300 and the internal space of the evaporation section 100, the pressure difference can act as a driving force to cause reversible deformation of the variable liquid storage section 300. Specifically, if the internal pressure of the variable liquid storage section 300 is higher than the internal pressure of the evaporation section 100, the flexible sidewall will expand outward, increasing the volume of the variable liquid storage section 300; conversely, if the internal pressure is lower than the external pressure, the flexible sidewall will contract inward, decreasing the volume of the variable liquid storage section 300. This deformation is reversible, meaning that when the pressure difference disappears or reverses, the flexible sidewall can return to its initial state or a new equilibrium state, thereby achieving dynamic and automatic adjustment of the volume of the variable liquid storage section 300.

[0047] Through the above technical solution, the sidewall of the variable liquid storage section 300 adopts a flexible structure, so that its volume adjustment no longer relies on complex mechanical drives or active control systems. Instead, it can achieve automatic, passive, and reversible deformation through the pressure difference between its internal space and the internal space of the evaporation section 100, thereby precisely and sensitively adjusting its volume and ensuring that the liquid working fluid in the variable liquid storage section 300 is always kept in a near-full state. This not only simplifies the structure of the device and improves the reliability of operation, but also effectively avoids the problem of decreased heat exchange efficiency or local overheating caused by changes in the volume of the working fluid, thus optimizing the overall performance of the heat pipe heat exchange device.

[0048] In one embodiment, such as Figure 5 As shown, this application further proposes a variable liquid storage section 300 including a top plate 310, a bottom plate 320 and a flexible sleeve 330, with both ends of the flexible sleeve 330 being sealed and connected to the top plate 310 and the bottom plate 320 respectively.

[0049] Specifically, the top plate 310, as the upper structure of the variable liquid storage section 300, is typically made of a material with sufficient rigidity, such as a metal alloy (e.g., stainless steel, aluminum alloy) or high-strength engineering plastics. Its main function is to provide a stable upper connection and sealing interface for the flexible sleeve 330, while also withstanding internal or external pressure, and serving as a base for connection with other components. The bottom plate 320, as the lower structure of the variable liquid storage section 300, is similar to the top plate 310 and is also made of a material with sufficient rigidity, such as a metal alloy or high-strength engineering plastics. Its main function is to provide a stable lower connection and sealing interface for the flexible sleeve 330, and also serves as a structure for positioning and supporting the variable liquid storage section 300 within the evaporation section 100. The top plate 310 and the bottom plate 320 together constitute the skeleton of the variable liquid storage section 300, ensuring its overall structural stability during deformation. The two ends of the flexible sleeve 330 are sealed to the top plate 310 and the bottom plate 320 respectively, which is crucial to ensuring that the working fluid inside the variable liquid storage section 300 does not leak. Sealing methods can include welding (for metal bellows), bonding (for rubber, silicone, or plastic sleeves), and mechanical clamping (via O-rings or gaskets).

[0050] In one embodiment, this application further proposes that the flexible sleeve 330 in the variable liquid storage section 300 can be a corrugated pipe, a rubber bag, a silicone bag, or a plastic bag, etc.

[0051] Specifically, when the flexible sleeve 330 is designed as a bellows, it is typically made of metal or polymer material and has a series of corrugated folds. This structure gives the bellows excellent axial expansion and contraction capabilities and a certain degree of radial flexibility, enabling it to achieve precise and reversible volume adjustment through the expansion or compression of the corrugations under the influence of internal and external pressure differences.

[0052] When the flexible sleeve 330 is designed as a rubber bag, it utilizes the inherent high elasticity and excellent sealing performance of the rubber material. Under pressure differential, the rubber bag undergoes significant and reversible elastic deformation, effectively altering the volume of the variable liquid reservoir 300. The rubber material possesses good fatigue resistance and wear resistance, enabling it to withstand frequent deformation cycles, while its excellent sealing performance ensures no leakage of the liquid working fluid, thus maintaining the normal operation of the heat pipe heat exchanger.

[0053] The beneficial effects of silicone bags and plastic bags are the same as those of rubber bags, and will not be elaborated here.

[0054] In another embodiment, this application further proposes that the variable liquid storage section 300 includes a controller, a telescopic sleeve, an inner pressure sensor, an outer pressure sensor, and a motor. The controller is located outside the heat pipe heat exchanger. The motor is electrically connected to an external power source and the controller via a connector. The motor is located within the evaporation section 100 and is used to drive the telescopic sleeve to extend or retract. The inner pressure sensor is located inside the telescopic sleeve and is used to monitor the pressure within the variable liquid storage section 300 in real time. The outer pressure sensor is located in the area between the evaporation section 100 and the telescopic sleeve and is used to monitor the pressure outside the variable liquid storage section 300 and inside the evaporation section 100. When the pressure difference between the pressure values ​​measured by the inner and outer pressure sensors exceeds a preset pressure difference value, the controller can control the telescopic sleeve to change its volume so that the pressure difference value is less than the preset pressure difference value.

[0055] Through the above technical solution, the heat pipe heat exchanger can achieve precise and active control of the volume of the variable liquid storage section 300. Inner and outer pressure sensors monitor the pressure difference inside and outside the variable liquid storage section 300 in real time, providing crucial feedback information to the controller. When the pressure difference exceeds the preset range, the controller can respond quickly, driving the motor to adjust the volume of the telescopic sleeve. This pressure difference-based active adjustment mechanism can effectively cope with changes in the working fluid volume and pressure of the evaporation section 100 under different operating conditions, ensuring that the liquid working fluid in the variable liquid storage section 300 is always kept near full. This not only avoids the risk of drying out due to insufficient working fluid filling but also prevents overflow or decreased heat transfer efficiency due to excessive working fluid, thereby significantly improving the heat transfer efficiency, stability, and reliability of the heat pipe heat exchanger and extending its service life.

[0056] In one embodiment, such as Figures 3-5 As shown, this application further proposes that the heat pipe heat exchange device also includes a limiting component 700, and the limiting component 700 and one side wall of the evaporation section 100 are respectively clamped at both ends of the variable liquid storage section 300 to limit the maximum volume of the variable liquid storage section 300.

[0057] The limiting component 700 is a structural component used to physically constrain the expansion range of the variable liquid storage section 300. The limiting component 700 and one side wall of the evaporation section 100 are respectively clamped at both ends of the variable liquid storage section 300. This means that by placing the variable liquid storage section 300 between the inner wall of the evaporation section 100 and the limiting component 700, a bidirectional or multidirectional physical constraint is formed. Specifically, one end face of the variable liquid storage section 300 can be tightly fitted against the inner wall of the evaporation section 100, while its opposite end face is blocked by the limiting component 700. This clamping arrangement can effectively limit the expansion of the variable liquid storage section 300 within a preset range, regardless of whether its expansion direction is axial or radial, thus precisely defining the maximum volume of the variable liquid storage section 300.

[0058] By physically limiting the maximum volume of the variable liquid storage section 300, excessive expansion when the internal pressure increases or the working fluid volume increases can be effectively avoided, thereby preventing material fatigue, cracking, or permanent deformation of the variable liquid storage section 300 itself. Simultaneously, this also avoids unnecessary contact or compression between the variable liquid storage section 300 and other functional components inside the evaporation section 100 (such as the power element 600, the liquid suction core 400, or the liquid suction spray assembly 500), ensuring the normal operating space and functional integrity of these components, and thus improving the long-term stability and heat transfer efficiency of the entire heat pipe heat exchange device.

[0059] This application further proposes various implementation methods for the limiting component 700, wherein the limiting component 700 and one side wall of the evaporation section 100 are respectively clamped at both ends of the variable liquid storage section 300 to limit the maximum volume of the variable liquid storage section 300.

[0060] Specifically, in one embodiment, such as Figure 3 As shown, the limiting component 700 may include a limiting cage 710, which wraps around the outer periphery of the variable liquid reservoir 300. The limiting cage 710 is a wraparound structure designed to wrap around the outer periphery of the variable liquid reservoir 300. The limiting cage 710 is typically made of a material with a certain degree of rigidity, such as a metal mesh, perforated plate, or skeleton structure. When the variable liquid reservoir 300 attempts to expand under internal pressure, the limiting cage 710 provides uniform external support and restraint, preventing the variable liquid reservoir 300 from expanding excessively outward. The limiting cage 710 effectively disperses forces, avoids local stress concentration, and is suitable for scenarios requiring comprehensive protection and uniform restraint.

[0061] In another embodiment, such as Figure 4As shown, the limiting component 700 may include a limiting rod 720. One end of the limiting rod 720 is connected to the inner wall of the evaporation section 100, and the other end is bent and stops at the side of the variable liquid storage section 300 away from the wall of the evaporation section 100. The limiting rod 720 is a rod-shaped structure, with one end firmly connected to the inner wall of the evaporation section 100; the other end is designed in a bent shape and stops at the side of the variable liquid storage section 300 away from the wall of the evaporation section 100. In this way, the expansion of the variable liquid storage section 300 is limited by providing one or more discrete support points. The bent portion of the limiting rod 720 can be customized according to the shape and expansion direction of the variable liquid storage section 300 to achieve a precise limiting effect. The limiting rod 720 is suitable for applications with limited space or requiring directional limiting, and its structure is relatively simple.

[0062] In yet another embodiment, such as Figure 5 As shown, the limiting component 700 may include multiple limiting blocks 730, which are fixedly connected to the inner wall of the evaporation section 100 and stop at the side of the variable liquid storage section 300 away from the wall of the evaporation section 100. The limiting blocks 730 are multiple independent block-shaped structures, each fixedly connected to the inner wall of the evaporation section 100. These limiting blocks 730 are strategically arranged around the variable liquid storage section 300 and stop at the side of the variable liquid storage section 300 away from the wall of the evaporation section 100. Through the synergistic effect of multiple limiting blocks 730, a multi-point supported limiting frame can be formed, effectively limiting the maximum volume of the variable liquid storage section 300. The combination of the limiting blocks 730 offers good flexibility and is suitable for scenarios requiring distributed limiting support.

[0063] In one embodiment, such as Figures 3-7As shown, this application further proposes that the liquid suction spray assembly 500 includes a liquid suction section 510 and a liquid supply section 520. The liquid suction section 510 is mainly responsible for collecting liquid working fluid from the liquid suction core 400, while the liquid supply section 520 is responsible for transporting the liquid working fluid and spraying it onto the heating surface of the power element 600. The liquid suction section 510 includes a liquid suction pump 511 and a liquid suction tube assembly 512. The liquid suction section 510 actively draws liquid working fluid from the liquid suction core 400 through the liquid suction pump 511. The liquid suction pump 511 can be a miniature centrifugal pump, a peristaltic pump, or a gear pump, etc. After the liquid suction pump 511 is started, a negative pressure is generated in the liquid suction tube assembly 512, thereby actively drawing in the liquid working fluid enriched in the liquid suction core 400 and pumping it to the variable liquid storage section 300 through the liquid suction tube assembly 512. This ensures that even when gravity-driven reflux is impeded, the liquid working fluid can still be effectively collected and replenished to the variable reservoir 300, maintaining it in a near-full state. The liquid supply unit 520 includes a liquid supply pump 521 and a liquid supply pipe assembly 522. The liquid supply unit 520 draws liquid working fluid from the variable reservoir 300 via the liquid supply pump 521. The liquid supply pump 521 can also be a micro centrifugal pump, peristaltic pump, or gear pump, with characteristics similar to the suction pump 511. The liquid supply pipe assembly 522 is responsible for delivering the working fluid from the liquid supply pump 521 to the heating surface of the power element 600, and is designed with nozzles or spray holes at its end to achieve uniform spraying. The spraying method of the liquid supply unit 520 can employ atomizing nozzles, micro-orifice array nozzles, or thin-film spraying, aiming to maximize the contact area between the liquid working fluid and the heating surface, promoting efficient phase change heat absorption. This active spraying mechanism can effectively cope with high heat flux density, ensuring the stable operation of the power element 600.

[0064] It should be noted that the power supplies for both the suction pump 511 and the supply pump 521 are located outside the heat pipe heat exchanger. Considering that the inside of the heat pipe is usually in a vacuum, low-pressure, or certain pressure environment, and contains a high-temperature working fluid, placing the power supplies for the suction pump 511 and the supply pump 521 outside the heat pipe heat exchanger can avoid the power supply components being affected by high temperature, high humidity, or different pressure environments, extend their service life, and facilitate maintenance and replacement.

[0065] Furthermore, in one embodiment, this application proposes two pump arrangement methods: the suction pump 511 and the supply pump 521 are immersed in the liquid working medium of the variable liquid storage section 300; or, the suction pump 511 and the supply pump 521 are arranged in the space between the evaporation section 100 and the variable liquid storage section 300.

[0066] Specifically, such as Figure 5As shown, when the suction pump 511 and the supply pump 521 are immersed in the liquid working medium in the variable liquid storage section 300, the drive components (such as electric motors) of the suction pump 511 and the supply pump 521 need to be specially designed to adapt to the liquid working medium environment. For example, a brushless DC motor can be used with sealing treatment, or a magnetic coupling drive can be used, placing the motor externally and driving the internal pump impeller magnetically. The heat generated by the pump body of the suction pump 511 and the supply pump 521 during operation can be effectively absorbed and carried away by the surrounding liquid working medium, thereby achieving good cooling of the pump body, avoiding performance degradation or damage due to overheating, and extending its service life. In addition, the pump body is always in the liquid working medium, which can ensure reliable start-up and stable operation of the pump, avoid dry running or cavitation caused by gas intake, and improve the efficiency and stability of the working medium circulation. This arrangement also helps to simplify the pump inlet pipeline and reduce fluid resistance.

[0067] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, when the suction pump 511 and the supply pump 521 are located in the space between the evaporation section 100 and the variable liquid storage section 300, the "space between the evaporation section 100 and the variable liquid storage section 300" refers to the area inside the evaporation section 100 excluding the space occupied by the variable liquid storage section 300, typically an annular or irregular gap between the inner wall of the evaporation section 100 and the outer wall of the variable liquid storage section 300. The pump body can be fixed to the inner wall of the evaporation section 100 or mounted in the space via a bracket. In this case, the pump body is not directly immersed in the liquid working fluid of the variable liquid storage section 300, but is in the vapor or a small amount of reflux liquid working fluid environment inside the evaporation section 100. The pump inlet needs to be connected to the suction core 400 or the variable liquid storage section 300 via a pipeline to draw in the liquid working fluid. The pump drive also needs to consider reliability in the heat pipe environment and may require high-temperature resistance and corrosion protection treatment. Furthermore, by placing the suction pump 511 and the supply pump 521 within the space between the evaporation section 100 and the variable liquid storage section 300, the available space inside the evaporation section 100 can be effectively utilized, avoiding the pumps occupying valuable volume in the variable liquid storage section 300. This ensures that the variable liquid storage section 300 can store the maximum amount of liquid working fluid to meet different heat load requirements. This arrangement helps to achieve a compact design of the heat pipe heat exchanger, reduces external connection piping, and lowers system complexity and potential leakage risks.

[0068] In one embodiment, this application further proposes that the pumping flow rate of the suction section 510 is greater than or equal to the pumping flow rate of the supply section 520. Pumping flow rate refers to the volume of fluid transported by the pump per unit time. The design ensures that the liquid working medium in the variable storage section 300 can be replenished in a timely and sufficient manner, avoiding excessively rapid drops in the liquid level of the variable storage section 300, or even situations where the liquid level is too low or the section is empty, due to the supply section 520 spraying working medium onto the heating surface of the power element 600. Specifically, this can be achieved by selecting a suction pump 511 with a larger rated flow rate, or by adjusting the drive power, speed, or displacement of the suction pump 511, so that its actual pumping flow rate in the working state is greater than or equal to the pumping flow rate of the supply pump 521. Alternatively, the fluid resistance of the suction pipe assembly 512 can be reduced, or its effective flow cross-sectional area increased, so that the suction section 510 can transport more liquid working medium under the same pumping power.

[0069] In one embodiment, such as Figure 3 and Figure 7 As shown, this application further proposes that the liquid-absorbing core 400 in the above-mentioned liquid-absorbing spray assembly 500 includes a continuously extending and interconnected liquid-absorbing section 410 and a negative pressure generating section 420. At least a portion of the outer surface of the liquid-absorbing section 410 communicates with the evaporation section 100 to absorb the liquid working fluid flowing back into the evaporation section 100. The heat pipe heat exchange device also includes a sealing plate 430, which surrounds and seals the outer surface of the negative pressure generating section 420, so that the outer surface of the negative pressure generating section 420 is sealed by the sealing plate 430; or, the sealing plate 430 and the inner wall of the evaporation section 100 cooperate and seal the outer surface of the negative pressure generating section 420, so that the outer surface of the negative pressure generating section 420 is jointly sealed by the sealing plate 430 and the inner wall of the evaporation section 100. One end of the suction pipe assembly 512 is inserted into the interior of the negative pressure generating section 420 so that when the suction pump 511 is running, the negative pressure generating section 420 can generate a negative pressure environment and draw in the liquid working medium in the suction section 410.

[0070] To ensure that the negative pressure generating section 420 can effectively generate and maintain negative pressure, this application provides a sealing plate 430. The sealing plate 430 can be a metal plate, a polymer material plate, etc., and is wrapped around and sealed to the outer surface of the negative pressure generating section 420 by welding, bonding, pressing, or mechanical fixing. This sealing method ensures the isolation between the negative pressure generating section 420 and the internal space of the evaporation section 100, so that the suction action of the suction pump 511 can be concentrated on the inside of the negative pressure generating section 420 (the pressure is negative relative to the space between the evaporation section 100 and the variable liquid storage section 300, rather than negative relative to atmospheric pressure), thereby efficiently establishing a negative pressure environment. In another embodiment, the sealing plate 430 can cooperate with the inner wall of the evaporation section 100 to seal the outer surface of the negative pressure generating section 420. For example, the sealing plate 430 forms part of the outer wall of the negative pressure generating section 420, while the inner wall of the evaporation section 100 serves as another part of the outer wall, and the two together form a sealed cavity. The suction tube assembly 512 serves as the connection channel between the suction pump 511 and the suction core 400, with one end precisely inserted into the negative pressure generating section 420. This insertion method ensures that the suction force of the suction pump 511 can directly act on the negative pressure generating section 420, thereby drawing out the liquid working medium inside the negative pressure generating section 420 when the suction pump 511 starts, causing the regional pressure to drop rapidly and forming a stable relative negative pressure environment.

[0071] Through the above technical solution, the suction core 400 is cleverly divided into a suction section 410 and a negative pressure generating section 420, and a sealing plate 430 is used to effectively seal the negative pressure generating section 420. When the suction pump 511 is running, its suction force acts directly on the inside of the negative pressure generating section 420, quickly establishing a stable negative pressure environment in the area. This negative pressure, through the connectivity between the negative pressure generating section 420 and the suction section 410, can efficiently and stably draw the liquid working medium enriched in the suction section 410 to the negative pressure generating section 420, then into the suction pipe assembly 512, and finally transported to the variable liquid storage section 300. This design effectively avoids the uneven suction, bubble generation, or cavitation phenomena that may occur when the suction pump 511 directly draws liquid from the entire surface of the suction core 400, significantly improving the efficiency and stability of the liquid working medium transport from the suction core 400 to the variable liquid storage section 300. Therefore, the solution ensures a continuous and stable supply of liquid working fluid, thereby guaranteeing that the power element 600 can be adequately cooled under various operating conditions, and thus improving the overall heat exchange performance and reliability of the heat pipe heat exchange device.

[0072] In one embodiment, the present application further proposes that the inlet of the suction tube assembly 512 is provided with a filter screen (not shown), and the supply tube assembly 522 includes one or more sections of bent tube (not shown), and at least part of the inner sidewall of the bent tube is provided with an exhaust hole so that the gaseous working fluid is discharged from the supply tube assembly 522 through the exhaust hole.

[0073] Specifically, the inlet of the suction pipe assembly 512 is equipped with a filter screen. The filter screen is usually made of metal wire mesh with a specific pore size, a porous plate, or a sintered material. Its main function is to physically block solid particulate impurities in the liquid working fluid from entering the suction pipe assembly 512. The supply pipe assembly 522 includes one or more sections of bends. The bends in the supply pipe assembly 522, such as U-shaped bends, S-shaped bends, or spiral bends, have a geometry that can utilize the centrifugal force effect in fluid dynamics to cause air bubbles in the liquid working fluid to accumulate on the inside of the bends. The gas is then effectively discharged from the supply pipe assembly 522 through the vent holes on the inside of the bends, thereby preventing gas accumulation and the formation of gas resistance.

[0074] By employing the aforementioned technical solution, a filter screen is installed at the inlet of the suction pipe assembly 512, effectively filtering solid impurities in the liquid working fluid. This prevents impurities from entering the suction pipe assembly 512 and the subsequent variable storage section 300, thereby protecting the suction pump 511 and the supply pump 521 from wear or blockage and ensuring the purity of the liquid working fluid. Simultaneously, the bend in the supply pipe assembly 522 and the vent holes on its inner wall provide an effective discharge channel for gaseous working fluid or non-condensable gases in the liquid working fluid. When the supply pump 521 is running, bubbles accumulate at the bend and are discharged through the vent holes, avoiding gas blockage caused by gas accumulation and ensuring a continuous and stable supply of liquid working fluid to the supply pipe assembly 522. This not only ensures smooth circulation of the liquid working fluid from the suction core 400 to the variable storage section 300 and maintains the normal operation of the negative pressure generating section 420, but also improves the operational reliability and heat exchange efficiency of the entire heat pipe heat exchange device, extending its service life.

[0075] Of course, in other embodiments, when the amount of gaseous working fluid is small, the gaseous working fluid may not be discharged and can naturally transform into liquid working fluid under the pressure of the internal pipeline. Furthermore, when the liquid working fluid mixed with some gaseous working fluid is sprayed, the diameter of the sprayed droplets will be smaller, which is beneficial to improving the atomization effect of the sprayed liquid working fluid.

[0076] In one embodiment, this application further proposes that the suction core 400 includes a plurality of spaced-apart negative pressure generating sections 420, with the number of suction tube assemblies 512 corresponding one-to-one with the number of negative pressure generating sections 420, and each suction tube assembly 512 inserted into a corresponding negative pressure generating section 420. Specifically, a plurality of negative pressure generating sections 420 are arranged inside the suction core 400, these negative pressure generating sections 420 maintaining a certain spatial distance from each other, and preferably arranged along the outer periphery of the evaporation section 100. This multi-point distribution structure aims to expand the range of negative pressure action, ensuring that the suction core 400 can be effectively suctioned in different areas.

[0077] Through the above technical solution, multiple spaced negative pressure generating sections 420 are set in the liquid-absorbing core 400, and a corresponding liquid-absorbing pipe group 512 is configured for each negative pressure generating section 420. The heat pipe heat exchange device can realize distributed, multi-point suction of liquid working fluid in the liquid-absorbing core 400. When the liquid-absorbing pump 511 is running, multiple liquid-absorbing pipe groups 512 simultaneously generate negative pressure in their respective negative pressure generating sections 420. This makes the negative pressure range wider and can more uniformly and efficiently absorb liquid working fluid from various areas of the liquid-absorbing core 400. Especially when the evaporation section 100 has a large area or the heating surface of the power element 600 is unevenly distributed, this multi-point suction mechanism can effectively avoid the occurrence of local drying phenomenon and ensure that the liquid working fluid can be supplied to the heating surface of the power element 600 in a timely and sufficient manner.

[0078] In one embodiment, the present application further proposes that the liquid suction part 510 also includes an extension tube (not shown in the figure), one end of which is connected to the opening of the liquid suction tube assembly 512 inserted into the liquid suction core 400, and the other end extends inside the liquid suction core 400. Furthermore, the side wall of the extension tube is provided with a plurality of through holes that communicate with the liquid suction core 400.

[0079] Specifically, the extension tube is a component of the suction section 510, and its main function is to increase the effective suction range of the suction tube assembly 512 within the suction core 400. One end of the extension tube is connected to the opening where the suction tube assembly 512 inserts into the suction core 400, ensuring that the liquid working medium can enter the suction tube assembly 512 from the extension tube. Its other end extends further inside the suction core 400, so that the suction effect is no longer limited to a single inlet of the suction tube assembly 512, but can cover a wider area inside the suction core 400. Simultaneously, through holes are provided on the side wall of the extension tube and communicate with the interior of the suction core 400. These through holes are channels for the liquid working medium to enter the extension tube from the suction core 400. By providing multiple through holes, multiple points of liquid working medium can be drawn in along the extension tube, rather than just through the end of the extension tube or a single opening.

[0080] Through the above technical solution, the liquid absorption part 510 can achieve a more extensive and uniform absorption of the liquid working medium inside the liquid absorption core 400 through the extension tube and the multiple through holes on its side wall. When the liquid absorption pump 511 operates, the negative pressure not only acts on the inlet of the liquid absorption tube group 512, but also forms a more dispersed and balanced negative pressure area inside the liquid absorption core 400 through the multiple through holes on the extension tube. This effectively avoids the phenomena of local accumulation or local dry-out of the liquid working medium inside the liquid absorption core 400, and improves the utilization rate of the liquid working medium of the liquid absorption core 400. At the same time, the multi-point liquid absorption method also reduces the risk of liquid absorption interruption caused by blockage or liquid level fluctuation at a single liquid absorption point, thereby ensuring that the liquid working medium can be continuously and stably absorbed from the liquid absorption core 400 and transported to the variable liquid storage part 300, and further improving the overall operation reliability and heat transfer efficiency of the heat pipe heat exchange device.

[0081] The present application further proposes that the inner wall of the evaporation section 100 is provided with a groove, and the liquid absorption core 400 is filled and arranged in the groove. The groove is in a shape of "mouth-shaped" (as Figure 3 shown), "day-shaped", "field-shaped" or "grid-shaped" (as Figure 6 shown), etc.

[0082] Specifically, the inner wall of the evaporation section 100 can form a groove structure by various methods such as machining, casting, stamping or laser etching. These grooves are designed to provide an accurate accommodation space for the liquid absorption core 400, ensure that the liquid absorption core 400 can be stably fixed on the inner wall of the evaporation section 100, and form a close contact with the inner wall. In addition, the geometric shape of the groove is not single, but can be flexibly designed according to the layout of the power element 600, the heat flux density distribution and the overall structure of the heat pipe heat exchange device. For example, the "mouth-shaped" groove can form a continuous liquid working medium channel surrounding the power element 600; the "day-shaped" groove can provide multiple parallel liquid working medium delivery paths; the "field-shaped" or "grid-shaped" grooves can form a more dense and interconnected capillary network to achieve a more extensive and uniform distribution of the liquid working medium, especially suitable for power elements 600 with multiple hot spots or large-area heat generation. These diverse shape designs aim to maximize the contact area between the liquid absorption core 400 and the inner wall of the evaporation section 100, optimize the capillary delivery path of the liquid working medium, and adapt to different heat source characteristics to improve the heat transfer efficiency and prevent local overheating.

[0083] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0084] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the 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 protection scope of this application. Therefore, the scope of protection of this application should be determined by the appended claims.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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 heat pipe heat exchanging device, characterized by, It includes an evaporation section (100), a condensation section (200), a variable liquid storage section (300), a liquid suction core (400), and a liquid suction spray assembly (500). The variable liquid storage section (300) is disposed in the evaporation section (100). The volume of the variable liquid storage section (300) is adjustable so that the ratio of the volume of the liquid working fluid in the variable liquid storage section (300) to the volume of the variable liquid storage section (300) is kept greater than a preset ratio. At least a portion of the liquid-absorbing core (400) is disposed in the lower region of the evaporation section (100) along the direction of gravity to absorb the liquid working fluid flowing back from the condensation section (200) to the evaporation section (100); The power element (600) is disposed in the evaporation section (100), and the liquid working fluid can be transferred sequentially between the liquid absorption core (400), the variable liquid storage section (300) and the heating surface of the power element (600) through the liquid absorption spray assembly (500); The sidewall of the variable liquid storage section (300) is a flexible structure. When there is a pressure difference between the internal space of the variable liquid storage section (300) and the internal space of the evaporation section (100), the pressure difference can drive the variable liquid storage section (300) to undergo reversible deformation in order to adjust the volume of the variable liquid storage section (300). The liquid suction spray assembly (500) includes a liquid suction section (510) and a liquid supply section (520). The liquid suction section (510) includes a liquid suction pump (511) and a liquid suction tube assembly (512). The liquid suction pump (511) can draw liquid working fluid from the liquid suction core (400) through the liquid suction tube assembly (512) and deliver it to the variable liquid storage section (300). The liquid supply unit (520) includes a liquid supply pump (521) and a liquid supply pipe assembly (522). The liquid supply pump (521) can draw liquid working fluid from the variable liquid storage unit (300) through the liquid supply pipe assembly (522) and spray it onto the heating surface of the power element (600).

2. The heat pipe heat exchange device according to claim 1, characterized in that, It also includes a limiting component (700), and one side wall of the limiting component (700) and the evaporation section (100) are respectively clamped at both ends of the variable liquid storage section (300) to limit the maximum volume of the variable liquid storage section (300).

3. The heat pipe heat exchange device according to claim 2, characterized in that, The limiting assembly (700) includes a limiting cage (710) which is wrapped around the outer periphery of the variable liquid storage section (300); Alternatively, the limiting assembly (700) includes a limiting rod (720), one end of which is connected to the inner wall of the evaporation section (100), and the other end is bent and stopped on the side of the variable liquid storage part (300) away from the wall of the evaporation section (100). Alternatively, the limiting component (700) may include a plurality of limiting blocks (730), which are fixedly connected to the inner wall of the evaporation section (100) and stop the variable liquid storage part (300) on the side away from the wall of the evaporation section (100).

4. The heat pipe heat exchange device according to claim 1, characterized in that, The pumping flow rate of the liquid suction section (510) is greater than or equal to the pumping flow rate of the liquid supply section (520).

5. The heat pipe heat exchange device according to claim 1, characterized in that, The suction pump (511) and the supply pump (521) are immersed in the liquid working medium in the variable storage section (300); Alternatively, the suction pump (511) and the supply pump (521) may be disposed in the space between the evaporation section (100) and the variable storage section (300).

6. The heat pipe heat exchange device according to claim 1, characterized in that, The liquid-absorbing core (400) includes a continuously extending and connected liquid-absorbing section (410) and a negative pressure generating section (420). At least a portion of the outer surface of the liquid-absorbing section (410) is connected to the evaporation section (100) to absorb the liquid working fluid flowing back into the evaporation section (100). The heat pipe heat exchange device also includes a sealing plate (430). The sealing plate (430) surrounds and seals the outer surface of the negative pressure generating section (420), or the sealing plate (430) and the inner wall of the evaporation section (100) cooperate and seal the outer surface of the negative pressure generating section (420). One end of the suction tube assembly (512) is inserted into the interior of the negative pressure generating section (420) so that when the suction pump (511) is running, the negative pressure generating section (420) can generate a negative pressure environment and draw in the liquid working medium in the suction section (410).

7. The heat pipe heat exchanger according to claim 6, characterized in that, The inlet of the suction tube assembly (512) is provided with a filter screen, and the supply tube assembly (522) includes one or more sections of bent tubes, and at least part of the inner sidewall of the bent tubes is provided with an exhaust hole so that the gaseous working fluid can be discharged from the supply tube assembly (522) through the exhaust hole.

8. The heat pipe heat exchange device according to claim 6, characterized in that, The suction core (400) includes a plurality of spaced negative pressure generating sections (420). The number of suction tube groups (512) and the number of negative pressure generating sections (420) are arranged in a one-to-one correspondence. Each suction tube group (512) is inserted into the corresponding negative pressure generating section (420).

9. The heat pipe heat exchange device according to claim 1, characterized in that, The liquid suction part (510) also includes an extension tube, one end of which is connected to the opening of the liquid suction tube assembly (512) inserted into the liquid suction core (400), and the other end extends inside the liquid suction core (400). Furthermore, the side wall of the extension tube is provided with a plurality of through holes that connect to the liquid suction core (400).

10. The heat pipe heat exchange device according to claim 1, characterized in that, The inner wall of the evaporation section (100) is provided with a groove, and the liquid absorption core (400) is filled in the groove.

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