AR smart glasses heat dissipation device

Abstract

The utility model provides a kind of AR intelligent glasses heat dissipation device, and the heat dissipation device is placed in the frame of AR intelligent glasses;The heat dissipation device includes capillary heat pipe, and the capillary heat pipe includes evaporation section, heat insulation section and condensation section, and the heat insulation section is placed between the evaporation section and the condensation section;The evaporation section is placed in the frame close to heating element;The heat insulation section is located in the frame, for steam delivery to the condensation section;The condensation section is placed in the frame and close to the frame edge, for releasing heat to the outside world.The capillary heat pipe is set in the frame, and the phase change principle of condensate in heat pipe is used, so that the evaporation section quickly absorbs the heat generated by heating element, and the heat is efficiently transmitted to the condensation section at the edge of the frame through the heat insulation section, forming a complete heat transfer path, which not only improves the heat dissipation efficiency, but also avoids the noise, volume and life problems caused by traditional fan cooling mode.

Description

Technical Field

[0001] This utility model relates to the field of AR glasses, specifically to a heat dissipation device for AR smart glasses. Background Technology

[0002] As AR glasses become increasingly feature-rich, their integrated processor chips, sensors, and display driver modules generate significant heat under high loads. This not only affects the device's stability and performance but may also cause user discomfort. Current mainstream AR glasses cooling solutions have significant shortcomings: traditional natural cooling methods are inefficient and cannot meet the demands of high-load operation; while fan cooling is more efficient, it increases the device's weight and size, generates noise that interferes with the user experience, and the fan's lifespan limits the device's reliability and increases maintenance costs. Utility Model Content

[0003] The purpose of this invention is to solve the problem of inconvenient heat dissipation in existing AR glasses.

[0004] This utility model provides a heat dissipation device for AR smart glasses, wherein the heat dissipation device is placed inside the frame of the AR smart glasses; The heat dissipation device includes a capillary heat pipe, which includes an evaporation section, an insulation section, and a condensation section, with the insulation section placed between the evaporation section and the condensation section. The evaporation section is placed inside the frame near the heating element; the insulation section is located inside the frame and is used to transport steam to the condensation section; the condensation section is placed inside the frame and near the edge of the frame and is used to release heat to the outside.

[0005] Furthermore, the frame is provided with a channel specifically for accommodating the capillary heat pipe, and the capillary heat pipe forms a closed-loop structure within the frame.

[0006] Furthermore, the inner wall of the capillary heat pipe is provided with a capillary structure, which is a metal wire mesh or sintered metal powder.

[0007] Furthermore, the capillary heat pipe is filled with condensate, which is ethanol or a water-ethanol mixture.

[0008] Furthermore, the surface of the condensation section is provided with heat dissipation fins.

[0009] Furthermore, the heat dissipation fins are made of aluminum alloy.

[0010] Furthermore, the evaporation section is thermally connected to the heating element via thermally conductive silicone grease.

[0011] Furthermore, the diameter of the capillary heat pipe is 1-3 mm.

[0012] Furthermore, the length ratio of the evaporation section, the adiabatic section, and the condensation section of the capillary heat pipe is 1:2:1.

[0013] Furthermore, a protective coating is provided on a portion of the frame surface to prevent the condensation section of the capillary heat pipe from coming into direct contact with the user's skin.

[0014] Compared to existing technologies, this invention offers at least the following advantages: By incorporating capillary heat pipes within the frame, efficient and quiet heat conduction and dissipation are achieved. This heat dissipation device utilizes the phase change principle of the condensate within the heat pipe, enabling the evaporation section to rapidly absorb heat generated by the heating element. The heat is then efficiently transferred through the insulation section to the condensation section at the edge of the frame, forming a complete heat transfer path. This not only improves heat dissipation efficiency but also avoids the noise, size, and lifespan issues associated with traditional fan cooling methods. Simultaneously, it maintains the portability and wearing comfort of AR smart glasses, providing a reliable guarantee for the long-term stable operation of AR devices. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained as provided without creative effort.

[0016] Figure 1 This is a schematic diagram of the AR glasses in one embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the heat dissipation principle of AR glasses in one embodiment of the present invention; Figure 3 This is a cross-sectional schematic diagram of AR glasses in one embodiment of the present invention; Figure 4 This is a schematic diagram of the internal structure of a capillary heat pipe in one embodiment of the present invention; Figure 5 This is a schematic diagram of the capillary heat pipe in one embodiment of the present invention.

[0017] Among them, 1-frame; 2-temple; 3-plastic cover; 4-printed circuit board; 5-heating element; 6-thermal grease; 7-inner wall of capillary heat pipe; 8-capillary structure; 9-condensate. Detailed Implementation

[0018] The present invention will now be described in more detail with reference to the accompanying drawings, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being broadly known to those skilled in the art and is not intended to limit the present invention.

[0019] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0020] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer as will be explained below. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0021] This embodiment provides a heat dissipation device for AR smart glasses. Please refer to [link / reference]. Figures 1-5 The heat dissipation device is placed inside the frame 1 of the AR smart glasses.

[0022] The heat dissipation device includes a capillary heat pipe, which includes an evaporation section, an insulation section, and a condensation section, with the insulation section positioned between the evaporation section and the condensation section.

[0023] The evaporation section is placed inside the frame 1 near the heating element 5; the insulation section is located inside the frame 1 and is used to transport steam to the condensation section; the condensation section is placed inside the frame 1 and near the edge of the frame 1 and is used to release heat to the outside.

[0024] Specifically, the capillary heat pipe is a high-efficiency heat dissipation element that utilizes the principle of phase change heat transfer. The evaporation section absorbs heat generated by the heating element 5 (i.e., heats the condensate 9), causing the condensate 9 to vaporize. The vapor is then transferred to the condensation section via the insulation section, where it dissipates heat and re-liquefies. The condensate 9 then flows back to the evaporation section through the capillary structure 8 to complete the cycle. The evaporation section can be designed as a flat plate or tubular structure to accommodate heating elements 5 of different shapes; the insulation section can be wrapped with a vacuum insulation tube or a low thermal conductivity material to reduce heat loss; and the condensation section can be designed as a finned or flat plate structure to increase the heat dissipation area.

[0025] The capillary heat pipes achieve highly efficient heat transfer and dissipation, solving the performance degradation and wearing discomfort issues caused by excessive heat generation in AR glasses during high-load operation. Compared to traditional natural heat dissipation methods, it offers higher heat dissipation efficiency. Compared to fan-based cooling solutions, it has no moving parts, offering advantages such as noiselessness, high reliability, and compact size. By integrating the heat dissipation device inside the frame 1, it ensures effective heat dissipation while avoiding increased device size and weight, thus improving the user experience.

[0026] Furthermore, the frame 1 is provided with a channel specifically for accommodating the capillary heat pipe, and the capillary heat pipe forms a closed-loop structure within the frame 1.

[0027] Specifically, the channels inside the frame 1 can precisely match the shape and size of the capillary heat pipes, allowing the heat pipes to be stably fixed in a predetermined position. The channels can be integrally formed with the frame 1 using injection molding, or they can be formed through post-processing. A thermally conductive material layer can be provided on the inner wall of the channels to enhance heat conduction efficiency, or an insulating layer can be provided to prevent heat from diffusing to other parts of the frame 1. The closed-loop structure formed by the capillary heat pipes can be achieved by connecting the two ends of the bent heat pipes to form a complete loop, or a ring-shaped heat pipe design can be used to directly form a closed loop. The closed-loop structure enables more uniform heat distribution and avoids localized overheating.

[0028] By incorporating a dedicated channel and a closed-loop structure design, the problems of unstable heat pipe fixation and discontinuous heat conduction paths in traditional heat dissipation solutions can be effectively solved. The dedicated channel ensures a tight fit between the heat pipe and the frame 1, preventing displacement due to vibration; the closed-loop structure extends the heat conduction path and improves heat dissipation efficiency. This design maintains the lightweight characteristics of AR glasses while enhancing heat dissipation performance, avoiding device performance degradation and user discomfort caused by insufficient heat dissipation.

[0029] Furthermore, the inner wall 7 of the capillary heat pipe is provided with a capillary structure 8, which is a metal wire mesh or sintered metal powder.

[0030] The capillary structure 8 promotes the reflux of condensate 9 through capillary force. The metal mesh is a multi-layer woven stainless steel mesh with a mesh density of 100-200 mesh. The sintered metal powder is copper or nickel powder with a particle size range of 50-150 micrometers and a sintered porosity of 50%-70%. Specifically, the metal mesh can be fixed to the inner wall of the heat pipe by rolling or stacking, and the sintered metal powder is bonded to the pipe wall through a high-temperature and high-pressure process. As a preferred embodiment, the metal mesh is installed with an interference fit to the inner wall of the heat pipe, and the sintered metal powder is pre-placed on the pipe wall by an electroplating process before sintering.

[0031] By optimizing the morphology of the capillary structure 8, the circulation efficiency of the condensate 9 is effectively improved. The metal mesh has a regular pore structure, enabling rapid condensate transport. The porous nature of the sintered metal powder increases the evaporation area, and both enhance the phase change heat transfer performance. This solves the problem of localized drying caused by high heat flux density in traditional AR glasses, improving heat dissipation efficiency by more than 30% while maintaining the thin and light characteristics of the heat pipe.

[0032] Furthermore, the capillary heat pipe is filled with condensate 9, which is ethanol or a water-ethanol mixture.

[0033] The condensate 9 inside the capillary heat pipe is the key medium for heat transfer. After absorbing heat from the heating element 5 in the evaporation section, the condensate 9 vaporizes. The vapor is then transported to the condensation section through the adiabatic section, where it releases heat and re-liquefies, flowing back to the evaporation section through the capillary structure 8, completing the thermal cycle. Ethanol has a low boiling point and a high latent heat of vaporization, enabling it to rapidly absorb and transfer heat. A water-ethanol mixture can adjust the boiling point and thermal conductivity of the condensate 9 to meet different operating temperature requirements. Specifically, ethanol has a boiling point of 78.3℃, suitable for operation at lower temperatures; while the boiling point of the water-ethanol mixture can be changed by adjusting the ratio. For example, a mixture of 70% ethanol and 30% water can achieve efficient heat transfer in the 80-90℃ range. As a preferred embodiment, the condensate 9 fills 10%-30% of the internal volume of the capillary heat pipe, ensuring sufficient condensate 9 participates in the phase change cycle while avoiding excessive condensate 9 from hindering vapor flow. By using ethanol or a water-ethanol mixture as the condenser 9, the heat transfer efficiency of the capillary heat pipe can be effectively improved. The condenser 9 vaporizes at a lower temperature, rapidly transferring heat from the heating element 5 to the condensation section, thereby reducing the internal temperature of the AR smart glasses. Compared to using water alone as the condenser, ethanol or a water-ethanol mixture has a higher vaporization rate at lower temperatures, enabling a faster response to temperature changes in the heating element 5. Furthermore, the selection of the condenser 9 also considers compatibility with the capillary structure 8, avoiding corrosion of the metal mesh or sintered metal powder. Therefore, this technical solution can improve the user comfort and reliability of AR smart glasses while ensuring heat dissipation efficiency.

[0034] Furthermore, the surface of the condensation section is provided with heat dissipation fins.

[0035] Furthermore, the heat dissipation fins are made of aluminum alloy.

[0036] Specifically, the heat dissipation fins improve heat dissipation efficiency by increasing the surface area of ​​the condensation section. Aluminum alloy has a high thermal conductivity, enabling rapid heat transfer from the capillary heat pipes to the fin surface. Secondly, aluminum alloy has a low density, which does not significantly increase the overall weight of the AR glasses. Thirdly, aluminum alloy is easy to process and can be made into heat dissipation fins of various shapes to adapt to different frame structures. As a preferred embodiment, the heat dissipation fins can be manufactured using an extrusion molding process, with a fin thickness of 0.2-0.5 mm and a fin spacing of 1-2 mm, to maximize the heat dissipation area while ensuring structural strength. Furthermore, the surface of the heat dissipation fins can be anodized to improve surface emissivity.

[0037] By employing aluminum alloy heat sink fins, the problem of insufficient heat dissipation efficiency in the condenser section of AR glasses under high load operation is effectively solved. Compared with existing technologies, this solution improves heat dissipation performance without increasing additional energy consumption, while avoiding the noise and reliability issues associated with fan cooling. By optimizing the material and structural parameters of the heat sink fins, efficient heat dissipation is achieved while ensuring wearing comfort, helping to maintain a stable operating temperature for the internal electronic components of the AR glasses.

[0038] Furthermore, the evaporation section is thermally connected to the heating element 5 via thermally conductive silicone grease 6.

[0039] Specifically, thermal grease 6 is a high thermal conductivity interface material, mainly used to fill the microscopic gaps between the heating element 5 and the heat dissipation device to reduce contact thermal resistance. In specific implementation, the following methods can be used: the thickness of thermal grease 6 is controlled within the range of 0.1-0.3 mm; the thermal conductivity of thermal grease 6 is preferably 3-8 W / (m·K); the thermal grease 6 can be applied using screen printing or dispensing processes. Further, the base material of thermal grease 6 can be silicone resin, with fillers such as alumina, boron nitride, or silver powder added to improve thermal conductivity. As a preferred embodiment, thermal grease 6 forms an elastomer after curing to accommodate deformation caused by thermal expansion.

[0040] Efficient heat conduction between the evaporation section and the heating element 5 is achieved through thermal grease 6. The thermal grease 6 fully fills the air gaps at the contact surface, rapidly transferring the heat generated by the heating element 5 to the evaporation section of the capillary heat pipe. Therefore, compared to direct contact, this connection method can reduce interfacial thermal resistance by 40%-60%, thereby improving heat dissipation efficiency. Furthermore, due to the flexibility and compressibility of the thermal grease 6, it maintains stable thermal contact performance during long-term use, avoiding poor contact problems caused by vibration or thermal deformation.

[0041] In this embodiment, please refer to Figure 3The heating element 5 is placed at the connection between the frame 1 and the temple 2. The side of the heating element 5 away from the thermal grease 6 is also provided with a printed circuit board 4 and a plastic cover 3.

[0042] Furthermore, the diameter of the capillary heat pipe is 1-3 mm.

[0043] Specifically, if the diameter of the capillary heat pipe is too small, it will increase the resistance to steam flow and affect the heat transfer efficiency; while if the diameter is too large, it will increase the weight of the heat pipe, which is not conducive to the lightweight design of AR glasses. As a preferred embodiment, the capillary heat pipe can be a copper tube with an outer diameter of 2 mm, and its inner wall is provided with a metal wire mesh capillary structure 8. Furthermore, the diameter of the capillary heat pipe can also be selected according to the actual heat dissipation requirements, such as 1.5 mm or 2.5 mm, among other intermediate values. The diameter in the range of 1.8-2.2 mm has a good balance between weight and heat dissipation efficiency.

[0044] By optimizing the diameter of the capillary heat pipe, the weight of the heat pipe is effectively controlled while ensuring heat dissipation performance. Compared with existing technologies, the diameter range of 1-3 mm provides sufficient heat conduction cross-sectional area while avoiding wearing discomfort caused by excessive weight of the heat pipe. This size design allows the capillary heat pipe to be integrated into the frame 1 of the AR glasses, achieving efficient heat dissipation without increasing the volume.

[0045] Furthermore, the length ratio of the evaporation section, the adiabatic section, and the condensation section of the capillary heat pipe is 1:2:1.

[0046] Specifically, the evaporation section absorbs the heat generated by the heating element 5, and its length ratio is set to 1, ensuring sufficient heat absorption efficiency. The insulation section transports steam to the condensation section, and its length ratio is set to 2, ensuring that the steam does not condense during transport and avoiding heat loss. The condensation section releases heat to the outside environment, and its length ratio is set to 1, allowing heat to be fully released to the external environment.

[0047] By setting the length ratio of the evaporation section, insulation section, and condensation section to 1:2:1, heat transfer efficiency can be optimized. The evaporation and condensation sections have the same length ratio, balancing heat absorption and release, while the insulation section has a larger length ratio, effectively reducing heat loss during transport. This proportional design improves heat dissipation efficiency while avoiding uneven heat transfer or insufficient heat dissipation caused by improper length ratios.

[0048] Furthermore, a protective coating is provided on a portion of the surface of the frame 1 to prevent the condensation section of the capillary heat pipe from coming into direct contact with the user's skin.

[0049] The protective coating can be made of materials such as polyurethane, silicone rubber, or Teflon, with a thickness controlled within the range of 0.1-0.5 mm. The protective coating can be applied to the surface of the frame 1 by spraying, dipping, or hot pressing. As a preferred embodiment, the protective coating can be designed as a double-layer structure: the inner layer is a flexible material with a thermal conductivity greater than 1 W / (m·K), and the outer layer is a wear-resistant material with a surface hardness exceeding 3H. The protective coating can be applied to the nose pads of the frame 1 (when the nose pads are integrated) and the lower half of the frame 1.

[0050] By adding a protective coating, the comfort issue caused by the condenser section coming into contact with the skin during prolonged wear of AR glasses is resolved. When the capillary heat pipe transfers heat generated by the heating element 5 to the condenser section, a protective coating is applied to part of the frame 1 as a physical isolation layer. This maintains normal heat dissipation to the external environment while preventing direct contact between the condenser section and the human skin. Compared with existing technologies, this solution eliminates the hidden dangers of traditional metal heat dissipation components while maintaining heat dissipation efficiency, and does not increase the weight of the device or generate noise.

[0051] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A heat dissipation device for AR smart glasses, characterized in that, The heat dissipation device is placed inside the frame of the AR smart glasses; The heat dissipation device includes a capillary heat pipe, which includes an evaporation section, an insulation section, and a condensation section, with the insulation section placed between the evaporation section and the condensation section. The evaporation section is placed inside the frame near the heating element; the insulation section is located inside the frame and is used to transport steam to the condensation section; the condensation section is placed inside the frame and near the edge of the frame and is used to release heat to the outside.

2. The AR smart glasses heat dissipation device as described in claim 1, characterized in that, The frame has a dedicated channel to accommodate the capillary heat pipe, which forms a closed-loop structure within the frame.

3. The AR smart glasses heat dissipation device as described in claim 1, characterized in that, The capillary heat pipe has a capillary structure inside, which is a metal wire mesh or sintered metal powder.

4. The AR smart glasses heat dissipation device as described in claim 2, characterized in that, The capillary heat pipe is filled with condensate, which is ethanol or a water-ethanol mixture.

5. The AR smart glasses heat dissipation device as described in claim 1, characterized in that, The surface of the condensation section is provided with heat dissipation fins.

6. The AR smart glasses heat dissipation device as described in claim 5, characterized in that, The heat dissipation fins are made of aluminum alloy.

7. The AR smart glasses heat dissipation device as described in claim 1, characterized in that, The evaporation section is thermally connected to the heating element via thermally conductive silicone grease.

8. The AR smart glasses heat dissipation device as described in claim 1, characterized in that, The diameter of the capillary heat pipe is 1-3 mm.

9. The AR smart glasses heat dissipation device as described in claim 1, characterized in that, The length ratio of the evaporation section, the adiabatic section, and the condensation section of the capillary heat pipe is 1:2:

1.

10. The AR smart glasses heat dissipation device as described in claim 1, characterized in that, The frame has a protective coating on part of its surface to prevent the condensation section of the capillary heat pipe from coming into direct contact with the user's skin.

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