Mixed graphene heat dissipation system

Abstract

The utility model relates to a mixed graphene heat dissipation system. The system comprises a heat dissipation substrate; the outer baffle is installed on one face of the heat dissipation substrate so that a heat exchange space can be defined by the outer baffle and the heat dissipation substrate, and a liquid inlet and a liquid outlet which communicate with the heat exchange space are formed in the outer baffle; the inner surrounding plates are located in the heat exchange space, the two ends of each inner surrounding plate are arranged on the corresponding outer baffle, and the edges of the inner surrounding plates make contact with the heat dissipation substrate, so that a filling space is defined by the inner surrounding plates, the outer baffles and the heat dissipation substrate; and the graphene filler is filled in the filling space, and the graphene filler is in contact with the inner surrounding plate and the heat dissipation substrate at the same time.

Description

Technical Field

[0001] The utility model relates to the field of heat dissipation, in particular to a hybrid graphene heat dissipation system. Background Art

[0002] After working for a long time, the temperature of large electronic devices rises, which reduces their working performance. Therefore, liquid media are used to cool down the electronic devices. In this process, the liquid medium will circulate, and the low-temperature liquid medium will first flow to the electronic devices to absorb heat, so that the temperature of the electronic devices will be reduced. At the same time, the temperature of the liquid medium will rise, and the heated liquid medium will flow to the heat dissipation system, and the heat will be dissipated to a relatively low temperature environment through the heat dissipation system for heat dissipation, and then circulate to the electronic devices to achieve a cycle.

[0003] The above heat dissipation system includes a heat dissipation substrate, and a serpentine flow channel is arranged above the heat dissipation substrate. The liquid medium increases the contact time with the heat dissipation substrate through the serpentine flow channel, so that the heat dissipation substrate is used to conduct heat to the outside of the heat dissipation system. In order to ensure the mechanical strength, the heat dissipation substrate is difficult to meet the requirements of lightness and thinness. Therefore, the heat conduction path between the liquid medium and the outside of the heat dissipation system is long, and heat is easily accumulated in the heat dissipation substrate, resulting in a high temperature of the heat dissipation substrate, which reduces the heat conduction efficiency of the liquid medium to the heat dissipation substrate and reduces the heat dissipation efficiency of the liquid medium. Utility Model Content

[0004] Based on this, it is necessary to provide a hybrid graphene cooling system to address the problem of insufficient heat dissipation efficiency of liquid media in the cooling system.

[0005] A hybrid graphene heat dissipation system, comprising:

[0006] Heat dissipation substrate;

[0007] An outer baffle, the outer baffle being mounted on one side of the heat dissipation substrate to enclose a heat exchange space with the heat dissipation substrate, and the outer baffle being provided with a liquid inlet and a liquid outlet connected to the heat exchange space;

[0008] a plurality of inner panels, wherein the inner panels are located in the heat exchange space, both ends of the inner panels are disposed on the outer baffles, and the edges of the inner panels are in contact with the heat dissipation substrate, so that the inner panels, the outer baffles and the heat dissipation substrate surround and form a filling space; and

[0009] A graphene filler is filled in the filling space, and the graphene filler contacts the inner enclosure plate and the heat dissipation substrate at the same time.

[0010] The outer baffle of the utility model includes a first baffle portion and a second baffle portion arranged opposite to each other in a first direction, and there are at least two inner baffles. The inner baffles are arranged on the first baffle portion and the second baffle portion to form a serpentine flow channel in the heat exchange space, and the two ends of the serpentine flow channel are respectively connected to the liquid inlet and the liquid outlet.

[0011] The outer baffle of the utility model also includes a third baffle portion and a fourth baffle portion which are arranged opposite to each other in a second direction, the second direction being perpendicular to the first direction, one end of the third baffle portion being in contact with the first baffle portion, the other end of the third baffle portion being spaced apart from the second baffle portion to form the liquid inlet, one end of the fourth baffle portion being spaced apart from the first baffle portion to form the liquid outlet, the other end of the fourth baffle portion being in contact with the second baffle portion, the first baffle portion, the second baffle portion, the third baffle portion and the fourth baffle portion being all located at the edge of the heat dissipation substrate.

[0012] The hybrid graphene heat dissipation system of the utility model further comprises a heat dissipation cover plate, which covers the opening of the heat exchange space and contacts with the edge of the inner enclosure plate.

[0013] In the utility model, the heat dissipation substrate and / or the heat dissipation cover plate is provided with heat dissipation fins on one side located outside the heat exchange space.

[0014] In the utility model, a pressing block is arranged on one side of the heat dissipation cover plate facing the heat exchange space. The pressing block is located in the filling space and pressed on the graphene filler.

[0015] The pressing block of the utility model is simultaneously attached to the inner enclosure plate and the outer baffle plate.

[0016] The end of the inner enclosure plate of the utility model is arc-shaped.

[0017] The thickness of the inner enclosure plate of the utility model is smaller than the thickness of the heat dissipation substrate.

[0018] The outer baffle of the utility model is located in the heat exchange space and one side is concave to form a plug-in slot, and the end of the inner enclosure plate is plugged into the plug-in slot so that the inner enclosure plate can be detachably installed on the outer baffle plate.

[0019] The beneficial effects of the utility model are:

[0020] The liquid medium dissipates heat through the inner panel, graphene filler and heat dissipation substrate in turn. The thickness of the inner panel can be designed to be thinner, so that the inner panel has better thermal conductivity. The graphene filler itself has better thermal conductivity than the material of the inner panel. Therefore, the heat conducted to the inner panel by the liquid medium can be quickly transferred to the graphene filler and then to the heat dissipation substrate, reducing the accumulation of heat at the inner panel. The inner panel can always maintain a relatively low temperature, thereby allowing the liquid medium to stably and efficiently transfer heat to the inner panel, improving the heat dissipation efficiency of the liquid medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the main structure of the hybrid graphene heat dissipation system in Example 1 of the utility model;

[0022] Figure 2 This is a schematic diagram of the front view of the heat dissipation substrate and the outer baffle in Example 1 of the utility model;

[0023] Figure 3 for Figure 1 Schematic diagram of the cross-section structure at AA in the middle;

[0024] Figure 4 It is a schematic diagram of a partial cross-sectional structure of a hybrid graphene heat dissipation system in Example 2 of the utility model;

[0025] Figure 5 This is a partial front view structural schematic diagram of the hybrid graphene heat dissipation system in Example 3 of the utility model.

[0026] Reference numerals:

[0027] 1. Heat dissipation substrate; 2. Outer baffle; 21. Liquid inlet; 22. Liquid outlet; 23. First baffle portion; 24. Second baffle portion; 25. Serpentine flow channel; 26. Third baffle portion; 27. Fourth baffle portion; 28. Plug-in slot; 3. Inner panel; 4. Graphene filler; 5. Heat dissipation cover; 51. Press block; 6. Filling space. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0034] Embodiment 1:

[0035] See also Figure 1 This embodiment provides a hybrid graphene heat dissipation system, including a heat dissipation substrate 1, an outer baffle 2, a plurality of inner panels 3 and a graphene filler 4.

[0036] See also Figure 2 The heat dissipation substrate 1 is a rectangular substrate made of a material that is conducive to heat transfer. The outer baffle 2 is arranged on the upper surface of the heat dissipation substrate 1 and is kept perpendicular to the heat dissipation substrate 1, so that the outer baffle 2 and the heat dissipation substrate 1 are surrounded to form a heat exchange space. Generally speaking, the outer baffle 2 and the heat dissipation substrate 1 are an integral structure, and the thickness of the outer baffle 2 and the heat dissipation substrate 1 is not too thin, so that the hybrid graphene heat dissipation system has good mechanical strength. The features described here are prior art and will not be repeated in this embodiment.

[0037] Specifically, the outer baffle 2 includes a first baffle portion 23 and a second baffle portion 24 arranged opposite to each other in a first direction, and a third baffle portion 26 and a fourth baffle portion 27 arranged opposite to each other in a second direction. The second direction is perpendicular to the first direction, and the first direction and the second direction are both perpendicular to the heat dissipation substrate 1. The third baffle portion 26 and the fourth baffle portion 27 are located between the first baffle portion 23 and the second baffle portion 24. One end of the third baffle portion 26 is in contact with and sealed to the first baffle portion 23. The third baffle portion 26 and the first baffle portion 23 are generally an integral structure. The other end of the third baffle portion 26 is spaced apart from the second baffle portion 24 to form a liquid inlet 21. One end of the fourth baffle portion 27 is spaced apart from the first baffle portion 23 to form a liquid outlet 22. The other end of the fourth baffle portion 27 is in contact with and sealed to the second baffle portion 24. The fourth baffle portion 27 and the second baffle portion 24 are generally an integral structure. Correspondingly, the liquid inlet 21 and the liquid outlet 22 are both connected to the heat exchange space.

[0038] See also Figure 1 and Figure 3, the inner enclosure 3 is intercepted by a plane parallel to the heat dissipation substrate 1, and the cross-sectional shape of the inner enclosure 3 is U-shaped. The inner enclosure 3 is located in the heat exchange space, and both ends of the inner enclosure 3 are provided on the outer baffle 2, and the edge of the inner enclosure 3 contacts the upper surface of the heat dissipation substrate 1. Thus, the inner enclosure 3, the outer baffle 2, and the heat dissipation substrate 1 enclose a filling space 6, and the graphene filler 4 is filled in the filling space 6, and the graphene filler 4 contacts both the inner enclosure 3 and the heat dissipation substrate 1 at the same time. The material of the inner enclosure 3 is generally the same as that of the heat dissipation substrate 1.

[0039] There are at least two inner enclosures 3. One part of the inner enclosures 3 is arranged on the first baffle part 23, and the other part of the inner enclosures 3 is arranged on the second baffle part 24, so that all the inner enclosures 3 are sequentially arranged at intervals in the second direction. Under the blockage of the inner enclosures 3, a serpentine flow channel 25 is formed in the heat exchange space, and the liquid inlet 21 and the liquid outlet 22 are respectively located at both ends of the serpentine flow channel 25 to communicate with the serpentine flow channel 25. The liquid medium with a higher temperature flows into the serpentine flow channel 25 through the liquid inlet 21, and the liquid medium dissipates heat and cools down during the flow in the serpentine flow channel 25, and finally the cooled liquid medium is discharged from the liquid outlet 22.

[0040] Specifically refer to Figure 3 , there are mainly two heat dissipation paths for the liquid medium in the serpentine flow channel 25, namely path a and path b.

[0041] In path a, the liquid medium directly conducts heat to the lower part of the heat dissipation substrate 1 through the heat dissipation substrate 1. Therefore, the length of path a is equal to the thickness of the heat dissipation substrate 1. Based on the foregoing, in order to ensure the mechanical strength of the hybrid graphene heat dissipation system, it is difficult to reduce the thickness of the heat dissipation substrate 1, and heat is likely to accumulate in the heat dissipation substrate 1, affecting the direct heat transfer of the liquid medium to the heat dissipation substrate 1. Therefore, the heat conduction of the liquid medium on path a has a certain effect, but the corresponding heat conduction efficiency is limited.

[0042] In path b, the liquid medium conducts heat to the bottom of the heat dissipation substrate 1 through the inner panel 3, the graphene filler 4 and the heat dissipation substrate 1 in turn. Since the mechanical strength of the hybrid graphene heat dissipation system is mainly guaranteed by the heat dissipation substrate 1 and the outer baffle 2 as its main frame, the thickness of the inner panel 3 can be designed to be thinner, for example, the thickness d1 of the inner panel 3 is smaller than the thickness d2 of the heat dissipation substrate 1, so as to allow the inner panel 3 to have better thermal conductivity. On this basis, the graphene filler 4 itself has better thermal conductivity than the material of the inner panel 3. Therefore, the heat conducted by the liquid medium to the inner panel 3 can be quickly transferred to the graphene filler 4 and transferred to the heat dissipation substrate 1, reducing the accumulation of heat at the inner panel 3. The inner panel 3 can always maintain a relatively low temperature, thereby allowing the liquid medium to stably and efficiently transfer heat to the inner panel 3. Therefore, path b can be used as a stable and efficient heat dissipation path for the liquid medium, and path b is also a main heat dissipation path for the liquid medium.

[0043] Based on the above analysis, it can be known that in this embodiment, based on path a and path b, the portion of the heat dissipation substrate 1 in the heat exchange space has a heat dissipation effect, rather than being limited to the portion of the heat dissipation substrate 1 at the serpentine flow channel 25. Therefore, in order to achieve effective utilization of the heat dissipation substrate 1, the first baffle portion 23, the second baffle portion 24, the third baffle portion 26 and the fourth baffle portion 27 are all located at the edge of the heat dissipation substrate 1, so that the entire heat dissipation substrate 1 is used to constitute the heat exchange space.

[0044] Preferably, in some other embodiments, a side of the heat dissipation substrate 1 facing away from the outer baffle 2 , that is, a side outside the heat exchange space, is provided with heat dissipation fins, thereby further improving the heat dissipation capacity of the heat dissipation substrate 1 .

[0045] The contact area between the outer baffle 2 and the liquid medium is limited, so the heat dissipation effect of the liquid medium based on the outer baffle 2 can be ignored. Under this condition, the thickness of the outer baffle 2 can be appropriately increased, thereby further improving the mechanical strength. After long-term use, the graphene filler 4 may be oxidized, resulting in a decrease in thermal conductivity, so the graphene filler 4 needs to be replaced regularly. The reduction in space in the filling space 6 will make it inconvenient to replace the graphene filler 4. Therefore, in this embodiment, the outer baffle 2 is located in the heat exchange space and one side is concave to form a plug-in groove 28, and the end of the inner panel 3 is plugged into the plug-in groove 28. On the one hand, the inner panel 3 is positioned by the plug-in groove 28, and on the other hand, the inner panel 3 is detachably installed on the outer baffle 2. When the graphene filler 4 needs to be replaced, all the inner panels 3 are removed, and then by tilting the heat dissipation substrate 1, all the graphene fillers 4 slide to one place under the action of gravity, and then pour out and collect from the liquid inlet 21 or the liquid outlet 22.

[0046] Embodiment 2:

[0047] See also Figure 4 The difference between this embodiment and embodiment 1 is that the hybrid graphene heat dissipation system further includes a heat dissipation cover plate 5, which covers the opening of the heat exchange space, and the top edge of the heat dissipation cover plate 5 and the outer baffle plate 2 are in contact with each other.

[0048] Under some working conditions, the height of the liquid medium in the serpentine flow channel 25 is flush with the top edge of the outer baffle plate 2. At this time, the heat dissipation cover plate 5 can prevent the liquid medium in the serpentine flow channel 25 from flowing out to the outside of the heat exchange space. At the same time, the inner baffle plate 3 and the outer baffle plate 2 are of the same height, so the heat dissipation cover plate 5 can contact the top edge of the inner baffle plate 3, thereby sealing the filling space to prevent the liquid medium in the serpentine flow channel 25 from directly flowing into the filling space and contacting the graphene filler 4, thereby preventing the liquid medium from dissolving the graphene filler 4 or reacting with the graphene filler 4 to reduce the thermal conductivity of the graphene filler 4. Under the above working conditions, the liquid medium in the serpentine flow channel 25 will contact the heat dissipation cover plate 5, so the liquid medium can also dissipate heat through the heat dissipation cover plate 5. Therefore, in some embodiments, the heat dissipation cover plate 5 is located on the side outside the heat exchange space, that is, the upper surface of the heat dissipation cover plate 5 can also be provided with heat dissipation fins.

[0049] Before the heat dissipation cover plate 5 is installed to the opening of the heat exchange space, the graphene filler 4 is generally not filled to the filling space to prevent the graphene filler 4 from overflowing. Therefore, the heat dissipation cover plate 5 will not be in direct contact with the graphene filler 4 after installation.

[0050] In this embodiment, a pressing block 51 is provided on one side of the heat dissipation cover plate 5 facing the heat exchange space. During the installation of the heat dissipation cover plate 5, the pressing block 51 enters the filling space and contacts the graphene filler 4, thereby compacting the powdered graphene filler 4, thereby reducing the gaps between the powders of the graphene filler 4, and thus improving the thermal conductivity of the final graphene filler 4. In addition, the pressing block 51 can also flatten the graphene filler 4 during the compaction of the graphene filler 4, thereby achieving full contact between the graphene filler 4 and the heat dissipation substrate 1, and ensuring the heat transfer effect of the graphene filler 4 on the heat dissipation substrate 1.

[0051] Furthermore, after entering the filling space, the pressing block 51 can be simultaneously attached to the inner panel 3 and the outer baffle 2, so that the pressing block 51 can be positioned by using the inner panel 3 and the outer baffle 2, thereby improving the installation accuracy of the heat dissipation cover plate 5 and improving the sealing of the filling space.

[0052] Embodiment 3:

[0053] See also Figure 5The difference between this embodiment and embodiment 1 is that the outer baffle plate 2 is not provided with a plug-in groove, and the end of the inner panel 3 is arc-shaped. The inner panel 3 of this embodiment can be obtained by bending the end of the inner panel 3 in embodiment 1 toward the outside of the filling space 6. Accordingly, the space size of the filling space 6 in this embodiment is expanded compared with that in embodiment 1, thereby allowing more graphene fillers to be filled, thereby improving the heat dissipation effect on the liquid medium. In addition, the arc-shaped end of the inner panel 3 also reduces the flow resistance of the liquid medium at the end of the inner panel 3.

[0054] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0055] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A hybrid graphene heat dissipation system, characterized in that: include: Heat dissipation substrate (1); An outer baffle (2), the outer baffle (2) being mounted on one side of the heat dissipation substrate (1) so as to enclose a heat exchange space with the heat dissipation substrate (1), the outer baffle (2) being provided with a liquid inlet (21) and a liquid outlet (22) connected to the heat exchange space; a plurality of inner panels (3), the inner panels (3) being located in the heat exchange space, the two ends of the inner panels (3) being arranged on the outer baffle plate (2), and the edges of the inner panels (3) being in contact with the heat dissipation substrate (1), so that the inner panels (3), the outer baffle plate (2) and the heat dissipation substrate (1) are arranged to form a filling space (6); and A graphene filler (4), wherein the graphene filler (4) is filled in the filling space (6), and the graphene filler (4) contacts the inner enclosure plate (3) and the heat dissipation substrate (1) at the same time.

2. The hybrid graphene heat dissipation system according to claim 1, characterized in that: The outer baffle plate (2) comprises a first baffle portion (23) and a second baffle portion (24) arranged opposite to each other in a first direction, the inner baffle plates (3) are at least two in number, and the inner baffle plates (3) are arranged on both the first baffle portion (23) and the second baffle portion (24) to form a serpentine flow channel (25) in the heat exchange space, and the two ends of the serpentine flow channel (25) are respectively connected to the liquid inlet (21) and the liquid outlet (22).

3. The hybrid graphene heat dissipation system according to claim 2, characterized in that: The outer baffle (2) further comprises a third baffle portion (26) and a fourth baffle portion (27) which are arranged opposite to each other in a second direction, the second direction being perpendicular to the first direction, one end of the third baffle portion (26) being in contact with the first baffle portion (23), the other end of the third baffle portion (26) being spaced apart from the second baffle portion (24) to form the liquid inlet (21), one end of the fourth baffle portion (27) being spaced apart from the first baffle portion (23) to form the liquid outlet (22), the other end of the fourth baffle portion (27) being in contact with the second baffle portion (24), and the first baffle portion (23), the second baffle portion (24), the third baffle portion (26) and the fourth baffle portion (27) are all located at the edge of the heat dissipation substrate (1).

4. The hybrid graphene heat dissipation system according to claim 1, characterized in that: The hybrid graphene heat dissipation system further comprises a heat dissipation cover plate (5), wherein the heat dissipation cover plate (5) covers the opening of the heat exchange space and contacts the edge of the inner enclosure plate (3).

5. The hybrid graphene heat dissipation system according to claim 4, characterized in that: The heat dissipation substrate (1) and / or the heat dissipation cover plate (5) is provided with heat dissipation fins on one side located outside the heat exchange space.

6. The hybrid graphene heat dissipation system according to claim 4, characterized in that: A pressing block (51) is provided on one side of the heat dissipation cover plate (5) facing the heat exchange space, and the pressing block (51) is located in the filling space (6) and is pressed onto the graphene filler (4).

7. The hybrid graphene heat dissipation system according to claim 6, characterized in that: The pressing block (51) is simultaneously attached to the inner enclosure plate (3) and the outer baffle plate (2).

8. The hybrid graphene heat dissipation system according to claim 1, characterized in that: The end of the inner enclosure plate (3) is arc-shaped.

9. The hybrid graphene heat dissipation system according to claim 1, characterized in that: The thickness of the inner panel (3) is smaller than the thickness of the heat dissipation substrate (1).

10. The hybrid graphene heat dissipation system according to claim 1, characterized in that: One side of the outer baffle plate (2) located in the heat exchange space is concave to form a plug-in slot (28), and the end of the inner enclosure plate (3) is plugged into the plug-in slot (28), so that the inner enclosure plate (3) can be detachably mounted on the outer baffle plate (2).

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