Solid-liquid phase change cavity structure with uniform enhanced heat conduction structure

Abstract

The solid-liquid phase change cavity structure comprises a phase change box body, a phase change cavity is formed in the phase change box body, a small stand column is arranged in the phase change cavity, a pouring hole is formed in one end of the bottom of the phase change box body, an exhaust hole is formed in the other end of the bottom of the phase change box body, and the pouring hole and the exhaust hole are connected to the phase change box body. The upper end of the phase change box body is covered with a cover plate, the pouring hole and the exhaust hole are further connected to an adapter, the stand column is directly milled, the machining cost of foamed aluminum is removed, and the machining risk is reduced; the upper surface of the cavity stand column and the periphery of the cavity are all brazed with the cover plate, contact is good, thermal resistance is small, the heat conductivity coefficient is high, pouring holes in the cover plate are not directly machined any more, an adapter is adopted for extending a pipeline, and the thickness of raw materials is reduced by at least 8 mm; a pouring hole welding plug is changed into a self-made aluminum screw and a silicon rubber O-shaped sealing ring, the machining cost is similar, poor pores caused by paraffin volatilization in the welding process are avoided, and the percent of pass is increased. And the welding cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of solid-liquid phase change chambers, in particular to a solid-liquid phase change chamber structure with a uniform enhanced heat conduction structure. Background Art

[0002] Some electronic devices cannot be cooled by air in a vacuum environment, and there is no liquid cooling source equipment for liquid cooling. They can only dissipate heat through conduction and radiation through the device itself as a heat sink. Therefore, solid-liquid phase change materials (such as paraffin) are generally embedded in the structure to control the temperature of the device. This material is widely used because of its large latent heat, low cost, no supercooling, and stable chemical properties. The material is solid at room temperature and absorbs heat when it melts into liquid when heated.

[0003] The key to using this technology is to load the solid-liquid phase change material into the metal box and seal the filling port. At present, the industry generally uses a cavity dug on the back of the box and fills it with foamed aluminum. The shape of the foamed aluminum is consistent with the cavity, but there is contact thermal resistance between the two. If necessary, welding is required to fix it, and then the cover is welded to the upper surface. In order to fill the cover, holes are punched on the front of the cover or the filling port is processed. After filling, the filling port is blocked. The blocking is generally done by vacuum electron beam welding.

[0004] Disadvantages of existing technology:

[0005] 1. The manufacturing cost of the foam aluminum block itself is relatively high

[0006] 2. The strength of foamed aluminum is relatively low, and the structural thickness must be at least 2 mm, which makes it difficult to form structures with more complex phase change cavities.

[0007] 3. The contact surface between the foam aluminum and the cavity and cover is small, so the entire area cannot be welded, and the contact thermal resistance is large.

[0008] 4. The injection holes are directly milled on the cover plate for hose connection, so the raw material is relatively thick;

[0009] 5. When welding the plugs at the injection holes on the cover plate, the inner side needs to be partially thickened to make a sinking cavity. During the injection process, cavities are easily formed on the lower surface of the cover plate. It is difficult to exhaust during the injection process, and a vacuum state must be drawn. Otherwise, it is easy to cause inflation, bulging, and leakage during use.

[0010] 6. Electron beam welding of cover plates and injection holes is relatively expensive and has high processing costs. Utility Model Content

[0011] In order to overcome the deficiencies of the prior art, the utility model solves the problems in the prior art that the phase change cavity using foam aluminum has low strength and is inconvenient to process.

[0012] A solid-liquid phase change cavity structure with a uniformly enhanced thermal conductivity structure includes a phase change box body, a phase change cavity is arranged inside the phase change box body, a small column is arranged in the phase change cavity, a perfusion hole is arranged at one end of the bottom of the phase change box body, and an exhaust hole is arranged at the other end, the perfusion hole and the exhaust hole are connected to the phase change box body, the upper end of the phase change box body is also covered with a cover plate, and the perfusion hole and the exhaust hole are also connected to an adapter.

[0013] Furthermore, the phase change box body is a rectangular frame structure, a rectangular groove is opened on the front of the phase change box body, a plurality of long steps are arranged inside the groove, and the long steps are perpendicular to each other to divide the rectangular block space.

[0014] Furthermore, the small pillars are rectangular block structures or cylindrical structures, vertically arranged inside the phase change cavity, with a height lower than the rectangular groove of the phase change box body, and a plurality of small pillars are evenly distributed inside the phase change box body.

[0015] Furthermore, the cover plate is a rectangular flat plate structure, and the size of the cover plate corresponds to the size of the phase change box body.

[0016] Furthermore, the adapter is a cylindrical structure, with an external thread at the bottom, a hexagonal boss in the middle, and a pagoda-shaped hose connection port at the top.

[0017] Beneficial effects of the utility model:

[0018] The columns are directly milled, eliminating the processing cost of foam aluminum and reducing processing risks;

[0019] The upper surface of the cavity column and the surrounding of the cavity are brazed with the cover plate, which has good contact, small thermal resistance and high thermal conductivity.

[0020] The injection holes on the cover are no longer processed directly, and adapters are used to extend the pipeline, reducing the thickness of the raw materials by at least 8mm;

[0021] The welding plug of the injection hole is changed to a self-made aluminum screw plus a silicone rubber O-ring. The processing cost is similar, but no electron beam welding is required, and there will no longer be poor porosity caused by the volatilization of paraffin during the welding process, which improves the qualification rate and reduces the welding cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a solid-liquid phase change cavity structure with a uniformly enhanced thermal conductivity structure;

[0023] Figure 2 A front view of a solid-liquid phase change cavity structure with a uniformly enhanced thermal conductivity structure;

[0024] Figure 3 It is a side view of a solid-liquid phase change cavity structure with a uniformly enhanced thermal conductivity structure;

[0025] Figure 4 It is a solid-liquid phase change cavity structure adapter with a uniformly enhanced thermal conductivity structure;

[0026] Figure 5 It is a top view of a solid-liquid phase change cavity structure adapter with a uniformly enhanced thermal conductivity structure;

[0027] In the figure: 1-phase change box, 2-phase change cavity, 3-small column, 4-injection hole, 5-exhaust hole, 6-cover plate, 7-adapter. DETAILED DESCRIPTION

[0028] The following is an explanation of the implementation of the present invention by specific specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to the implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present utility model. In order to provide a deep understanding of the present utility model, many specific details will be included in the following description. The present utility model can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present utility model, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. It should be noted that in this specification, similar reference numerals and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in the subsequent figures.

[0029] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate quantity restrictions, but indicate the existence of at least one. Words such as "set", "connected", "connected" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances. The directions or positional relationships indicated by “upper”, “lower”, “left”, “right”, “inner”, “bottom”, etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model.

[0030] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] In this embodiment, as shown in the attached Figure 1-5 As shown, a solid-liquid phase change cavity structure with a uniformly enhanced thermal conductive structure includes a phase change box body 1, a phase change cavity 2 is arranged inside the phase change box body 1, a small column 3 is arranged in the phase change cavity 2, a perfusion hole 4 is arranged at one end of the bottom of the phase change box body 1, and an exhaust hole 5 is arranged at the other end, the perfusion hole 4 and the exhaust hole 5 are connected to the phase change box body 1, and the upper end of the phase change box body 1 is also covered with a cover plate 6, and the perfusion hole 4 and the exhaust hole 5 are also connected to the adapter 7.

[0032] Furthermore, the phase change box body 1 is a rectangular frame structure, a rectangular groove is opened on the front of the phase change box body 1, a plurality of long steps are arranged inside the groove, and the long steps are perpendicular to each other to divide rectangular block spaces.

[0033] Furthermore, the small pillars 3 are rectangular block structures or cylindrical structures, and are vertically arranged inside the phase change cavity 2 , with a height lower than the rectangular groove of the phase change box body 1 , and a plurality of small pillars 3 are evenly distributed inside the phase change box body 1 .

[0034] Furthermore, the cover plate 6 is a rectangular flat plate structure, and the size of the cover plate 6 corresponds to the size of the phase change box body 1 .

[0035] Furthermore, the adapter 7 is a cylindrical structure, with an external thread at the bottom, a hexagonal boss in the middle, and a pagoda-shaped hose connection port at the top.

[0036] The principle of this application is as follows: the foam aluminum is eliminated. A columnar lattice structure is directly added to the inner cavity, and the column surface is also fully contacted and welded with the cover plate to form a whole; the injection hole is placed on the side, and a separate slotted screw plus a sealing ring is designed to seal the injection hole.

[0037] After the box body is dug, small columns (cylindrical or square) are evenly arranged. The columns can enhance the thermal conductivity of the phase change material and replace the foamed aluminum. The direct milling of the injection holes to the cover plate is eliminated, the raw materials of the cover plate are reduced, and the cost is reduced.

[0038] The vacuum infusion was changed to direct heated infusion with a syringe. Because the inner side of the infusion hole is at the highest point, exhaust is easy and it is not easy to form a cavity. There is no need to evacuate the air. It is only necessary to keep the phase change material in a melted state on the hot table. At the same time, a combination of homemade screws and silicone rubber O-rings is used to seal the hole.

[0039] Beneficial effects of the utility model:

[0040] 1. The columns are directly milled, eliminating the processing cost of foam aluminum and reducing processing risks;

[0041] 2. The upper surface of the cavity column and the surrounding of the cavity are brazed with the cover plate, with good contact, small thermal resistance and high thermal conductivity.

[0042] 3. The injection holes on the cover are no longer processed directly, and adapters are used to extend the pipeline, reducing the thickness of the raw materials by at least 8mm;

[0043] 4. The welding plug of the injection hole is changed to a self-made aluminum screw plus a silicone rubber O-ring. The processing cost is similar, but no electron beam welding is required, and there will no longer be poor porosity caused by the volatilization of paraffin during the welding process, which improves the qualification rate and reduces the welding cost.

[0044] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A solid-liquid phase change cavity structure with a uniformly enhanced thermal conductive structure, characterized in that: The invention comprises a phase change box body (1), wherein a phase change cavity (2) is arranged inside the phase change box body (1), a small column (3) is arranged inside the phase change cavity (2), a filling hole (4) is arranged at one end of the bottom of the phase change box body (1), and an exhaust hole (5) is arranged at the other end, the filling hole (4) and the exhaust hole (5) are connected to the phase change box body (1), the upper end of the phase change box body (1) is also covered with a cover plate (6), and the filling hole (4) and the exhaust hole (5) are also connected to an adapter (7).

2. The solid-liquid phase change cavity structure with a uniform enhanced thermal conductivity structure according to claim 1, characterized in that: The phase change box body (1) is a rectangular frame structure. A rectangular groove is provided on the front of the phase change box body (1). A plurality of long steps are arranged inside the groove. The long steps are perpendicular to each other and divide rectangular block spaces.

3. The solid-liquid phase change cavity structure with a uniform enhanced thermal conductivity structure according to claim 1, characterized in that: The small pillars (3) are of a rectangular block structure or a cylindrical structure, and are vertically arranged inside the phase change cavity (2), with a height lower than the rectangular groove of the phase change box body (1). A plurality of small pillars (3) are evenly distributed inside the phase change box body (1).

4. The solid-liquid phase change cavity structure with a uniform enhanced thermal conductivity structure according to claim 1, characterized in that: The cover plate (6) is a rectangular flat plate structure, and the size of the cover plate (6) corresponds to the size of the phase change box body (1).

5. The solid-liquid phase change cavity structure with a uniform enhanced thermal conductive structure according to claim 1, characterized in that: The adapter (7) is a cylindrical structure, with an external thread being provided at the bottom of the adapter (7), a hexagonal boss being provided in the middle, and a pagoda-shaped hose connection port being provided at the top.

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