Energy storage type heat sink device

Abstract

The present invention provides an energy storage type heat spreader device, comprising: a phase change energy storage structure, a flat plate heat pipe; the phase change energy storage structure and the flat plate heat pipe are coupled; the interior of the phase change energy storage structure uses metal foam (2); the flat plate heat pipe includes: a capillary structure (4), a steam chamber (5); and the capillary structure is filled with a heat pipe working medium (6). The present invention can realize the integrated integration technology of the flat plate heat pipe and the phase change energy storage material, while taking into account the temperature averaging capability of the flat plate heat pipe and the energy storage function of the phase change material, and can reduce the temperature shock of the periodic heat source, effectively suppress temperature fluctuations, and at the same time improve the adaptability of the flat plate heat pipe to distributed heat sources and the temperature averaging capability of point heat sources.

Description

Technical Field

[0001] The present invention relates to the technical field of heat transfer equipment, and in particular to an energy storage type heat sink device. Background Art

[0002] Flat-plate heat pipe is a highly efficient heat transfer device. Its shape is very conducive to heat diffusion of concentrated heat sources. The position and nature of the heat source on the flat-plate heat pipe have a great influence on the temperature uniformity and heat dissipation capacity of the flat-plate heat pipe. For flat-plate heat pipes with a single heat source, the heat source is often arranged in the center of the plate to improve its temperature uniformity. However, for multiple heat sources or periodic heat sources, it is easy to cause uneven distribution of heat load, thereby affecting the temperature uniformity of the flat-plate heat pipe.

[0003] Phase-change energy storage materials offer the advantages of being isothermal or nearly isothermal during phase changes, absorbing and releasing large amounts of latent heat, making them particularly suitable for instruments and equipment with periodic pulsed operation. Phase-change materials have no moving parts and, in principle, can operate reversibly infinitely, offering high reliability. There is an urgent need for an energy storage vapor chamber device.

[0004] Patent document CN105300152A discloses a phase-change energy storage material carrier and a method for encapsulating the phase-change energy storage material. The patent utilizes a hollow metal device as the carrier for the phase-change energy storage material. The device is sealed peripherally, with only a circular feed hole at the top that only needs to be sealed. This simplifies the encapsulation process, and the hollow metal device allows for a high phase-change material content. Furthermore, the metal material has good thermal conductivity, enabling better heat exchange. However, the structure and performance of this patent still require improvement. Summary of the Invention

[0005] In view of the defects in the prior art, an object of the present invention is to provide an energy storage type heat sink device.

[0006] According to the present invention, an energy storage type heat sink device is provided, including: a phase change energy storage structure and a flat plate heat pipe: the phase change energy storage structure and the flat plate heat pipe are coupled; the interior of the phase change energy storage structure adopts metal foam 2; the flat plate heat pipe includes: a capillary structure 4 and a steam chamber 5; the capillary structure is filled with a heat pipe working medium 6.

[0007] Preferably, the phase change energy storage structure and the flat heat pipe can adopt a surrounding structure or an upper and lower structure, and be isolated in the middle by a solid heat conductive medium such as aluminum to prevent the phase change material and the heat pipe working fluid from mixing with each other;

[0008] The phase-change energy storage structure is located around or on one side of the flat heat pipe, directly in contact with the heat source. The metal foam 2 is directly processed into the shell and brazed to the shell. The metal foam 2 is filled with a paraffin-based phase-change material as a phase-change working fluid, taking into account the thermal conductivity of the metal material and the energy storage function of the phase-change material. The brazing growth of the metal foam to the shell can reduce the thermal resistance of the phase-change structure.

[0009] The heat source is any one of the following:

[0010] -Point heat source;

[0011] - Periodic heat source;

[0012] -Distributed heat source.

[0013] For periodic heat sources, reasonable design can ensure that the heat absorbed by the phase change material is released when the heat source works next time, so that the instrument can be maintained near the phase change temperature zone of the material, thereby significantly improving the temperature control accuracy of the instrument.

[0014] Preferably, the solid heat-conducting medium is made of aluminum; and the paraffin-based phase change material is heated and filled into the metal foam 2 in liquid form.

[0015] Preferably, it further comprises: an outer shell 1; the outer shell comprises: a bottom plate and a cover plate; the bottom plate and the cover plate are connected.

[0016] Preferably, the heat exchanger further comprises: a heating element and an evaporation end 7; the heating element contacts the evaporation end 7, and heat is transferred from the outer shell 1 to the phase change material through heat conduction. The phase change material absorbs heat and changes from solid to liquid. The phase change material has isothermal or quasi-isothermal characteristics during the phase change process, absorbs and stores a large amount of latent heat, and the thermal conductivity of the phase change material is enhanced by metal foam, which transfers heat to the working fluid in the flat heat pipe. The working fluid is heated to form steam. Because the flow resistance in the steam chamber is small, the heat conduction direction includes the height direction and the plane direction. The working fluid steam can quickly transfer heat to all directions of the heat pipe. The working fluid steam is cooled and liquefied, and flows back to the heated surface through the reflux action of the capillary wick, completing the circulation of the working fluid and the uninterrupted transmission of heat, achieving the rapid uniform temperature heat transfer effect of the flat heat pipe. At the same time, the flat heat pipe evenly transfers heat to the peripheral phase change material, thereby achieving efficient heat uniformity. The evaporation end 7 is arranged at the bottom of the energy storage heat exchanger device.

[0017] Preferably, it also includes: a phase change energy storage structure and a flat heat pipe: the phase change energy storage structure and the flat heat pipe can adopt a surrounding structure or an upper and lower structure, and are isolated in the middle by a solid heat conductive medium such as aluminum to avoid mixing between the phase change material and the heat pipe working fluid; the interior of the phase change energy storage structure adopts metal foam 2; the flat heat pipe includes: a capillary structure 4 and a steam chamber 5.

[0018] Preferably, it further comprises: a condensation end 8 and a supporting cylinder 9 ; the condensation end 8 is arranged on the outside of the capillary structure 4 .

[0019] Preferably, it further comprises: a supporting cylinder 9; the supporting cylinder 9 is arranged at the lower end of the energy storage type heat sink device.

[0020] Preferably, it further comprises: an inner shell 3; the inner shell 3 is arranged inside the energy storage type heat sink device; the flat heat pipe is welded to the inner shell (3) using a capillary structure and filled with a corresponding heat pipe working fluid.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention can realize the integrated integration technology of flat-plate heat pipes and phase change energy storage materials, while taking into account the temperature uniformity of flat-plate heat pipes and the energy storage function of phase change materials. It can reduce the temperature shock of periodic heat sources and effectively suppress temperature fluctuations. At the same time, it can also improve the adaptability of flat-plate heat pipes to distributed heat sources and the temperature uniformity of point heat sources.

[0023] 2. Taking into account the low thermal conductivity of the phase change material, the present invention brazes and grows a metal foam material along the interior of the shell, heats the phase change material and fills it into the metal foam in a liquid state, thereby reducing the thermal resistance and enhancing the thermal conductivity of the phase change material;

[0024] 3. The structure of the present invention is easy to use and can overcome the defects of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0026] Figure 1 Schematic diagram of the surrounding structure in an embodiment of the present invention.

[0027] Figure 2 Schematic diagram of the upper and lower structures in an embodiment of the present invention.

[0028] In the figure: 1. Outer shell, 2. Metal foam, 3. Inner shell, 4. Capillary structure, 5. Evaporation chamber, 6. Heat pipe working medium, 7. Evaporation end, 8. Condensation end, 9. Support cylinder. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0030] like Figure 1 、 2 As shown, an energy storage type heat sink is formed by coupling a phase change energy storage structure and a flat plate heat pipe. A surrounding structure can be used between the phase change energy storage structure and the flat plate heat pipe. Figure 1 or upper and lower structures Figure 2 , the middle is isolated by solid heat-conducting media such as aluminum to avoid mixing between the phase change material and the heat pipe working fluid.

[0031] The phase-change energy storage component uses metal foam 2 as a thermally conductive material, primarily to enhance the thermal conductivity of the phase-change material and reduce the thermal resistance of the device, thereby achieving superior energy storage. During the metal foam production process, it is directly processed into the shell and brazed to the shell. This not only avoids the uncertainties introduced by the welding process but also ensures good contact between the aluminum foam and the shell. The metal foam encapsulates a paraffin-based phase-change material as the solid-liquid phase-change energy storage medium. The flat heat pipe consists of a capillary structure 4 and a vapor chamber 5, which is filled with the heat pipe medium 6.

[0032] The inner and outer shells of the present invention can both be composed of a bottom plate and a cover plate, and vacuum sealing welding technology is used to ensure the airtightness of the entire device.

[0033] The heating element is in contact with the evaporation end 7, and is transferred to the phase change material through heat conduction from the outer shell 1. The phase change material absorbs heat and changes from solid to liquid. The phase change material has isothermal or nearly isothermal characteristics during the phase change process, absorbs and stores a large amount of latent heat, and the thermal conductivity of the phase change material is enhanced by metal foam to transfer heat to the working fluid in the flat heat pipe. The working fluid is heated to form steam. Since the flow resistance in the steam chamber is small, the heat conduction direction includes the height direction and the plane direction. The working fluid steam can quickly transfer heat to all directions of the heat pipe. The working fluid steam is cooled and liquefied, and flows back to the heated surface through the reflux action of the capillary wick, completing the circulation of the working fluid and the uninterrupted transmission of heat, achieving the rapid uniform temperature heat transfer effect of the flat heat pipe. At the same time, the flat heat pipe transfers heat evenly to the peripheral phase change material, thereby realizing efficient heat uniformity.

[0034] The heating element can be a periodic heat source, a point heat source, or a distributed heat source. In the present invention, the flat heat pipe is not in direct contact with the heating element, and heat is stored and transferred through the phase change energy storage structure, which can effectively improve the temperature uniformity of the flat heat pipe for point heat sources and its adaptability to distributed heat sources. At the same time, due to the energy storage effect of the phase change material, part of the heat can be stored, thereby reducing the impact of heat on the heat pipe and improving the ultimate heat transfer capacity of the flat heat pipe.

[0035] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0036] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. An energy storage type heat sink device, characterized in that: include: Phase change energy storage structure, flat heat pipe: The phase change energy storage structure and the flat plate heat pipe are coupled; The interior of the phase change energy storage structure uses metal foam (2); The flat heat pipe comprises: a capillary structure (4) and a steam chamber (5); The steam chamber (5) partially or completely wraps the capillary structure (4); The capillary structure (4) is filled with a heat pipe working medium (6); The phase change energy storage structure and the flat plate heat pipe can adopt a surrounding structure or an upper and lower structure, and be isolated in the middle by a solid heat conducting medium; The phase change energy storage structure is located around or on one side of the flat heat pipe and is in direct contact with the heat source. The metal foam (2) is directly processed inside the shell and brazed and grown on the shell. The metal foam (2) is filled with a paraffin-based phase change material as a phase change working medium. The heat source adopts a periodic heat source; Also included: a heating element and an evaporation end (7); The heating element is in contact with the evaporation end (7); The evaporation end (7) is arranged at the lower part of the energy storage type heat sink device; It also includes: a condensation end (8), a supporting cylinder (9); The condensation end (8) is arranged on the outside of the capillary structure (4); The supporting cylinder (9) is arranged at the lower end of the energy storage type heat sink device; It also includes: an inner shell (3); The inner shell (3) is arranged inside the energy storage type heat sink device; The flat heat pipe is welded to the inner shell (3) using a capillary structure.

2. The energy storage type heat sink device according to claim 1, characterized in that: The solid heat-conducting medium is made of aluminum or copper; The paraffin-based phase change material is heated and filled into the metal foam (2) in liquid form.

3. The energy storage type heat sink device according to claim 1, characterized in that: Also includes: outer shell (1); The outer shell includes: a bottom plate and a cover plate; The bottom plate is connected to the cover plate.

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