A thermal control structure with directionality selectivity

Abstract

The present invention belongs to the field of thermal regulation technology, and provides a thermal regulation structure with directional selectivity. It solves the problem that the existing thermal regulation structure can only produce the same thermal regulation effect for heat flows incident in various directions. There are four regulation areas filled with a moving heat-conducting medium on the heat-conducting plate. The moving heat-conducting medium moves directionally in the regulation area. The central area surrounded by the four regulation areas serves as the target area for thermal regulation. The four regulation areas are separated in pairs; the four regulation areas are divided into two groups, each group includes two relatively set regulation areas, and the two regulation areas of one group are sandwiched between the two regulation areas of the other group; the moving heat-conducting medium in the two regulation areas of one group moves in a direction away from the target area for thermal regulation, and the moving heat-conducting medium in the two regulation areas of the other group moves in a direction toward the target area for thermal regulation. The present invention can produce different thermal regulation effects for heat flows incident in different directions.

Description

Technical Field

[0001] The present invention belongs to the technical field of thermal regulation, and in particular relates to a thermal regulation structure with directional selectivity. Background Art

[0002] Based on the covariance of the heat diffusion equation under coordinate transformations, transformational thermodynamics has become a new means of regulating heat flow, which has been used to design novel thermal control structures such as thermal concentrators, thermal cloaking structures, heat flow reversers, and thermal field distortion structures. Among them, thermal concentrators can converge heat flow and collect waste heat from electronic chips, which has high application value in modern scenarios with a large number of electronic components. Thermal cloaking structures can guide heat flow around protected areas, achieving a thermal shielding effect, which can be used to prevent temperature-sensitive components in circuits from overheating.

[0003] However, the current thermal control structure can only produce the same thermal control effect on heat flows incident in all directions, and there is still a lack of directional selective thermal control structures that can produce different thermal control functions for heat flows in different directions. Summary of the Invention

[0004] In order to solve the problem that the existing thermal regulation structure can only produce the same thermal regulation effect on heat flows incident in all directions, the present invention provides a thermal regulation structure with direction selectivity.

[0005] The present invention is implemented by the following technical solution: a heat control structure with directional selectivity, including a heat conducting plate and a moving heat conducting medium, the heat conducting plate having four control areas filled with the moving heat conducting medium, the moving heat conducting medium moving in a direction in the control areas, the central area surrounded by the four control areas serving as the target area for heat control, and the four control areas being separated in pairs; the four control areas are divided into two groups, each group including two relatively arranged control areas, the two control areas of one group being sandwiched between the two control areas of the other group; the moving heat conducting medium in the two control areas of one group moves in a direction away from the target area for heat control, and the moving heat conducting medium in the two control areas of the other group moves in a direction toward the target area for heat control.

[0006] Preferably, the control area is rectangular, and the short sides of the two control areas in the same group are flush; the short sides of the two control areas in one group clamped on the outside are flush with the outer long sides of the two control areas in the other group clamped on the inside.

[0007] Preferably, the two regulatory regions in the same group are symmetrical relative to the center of the target region.

[0008] Preferably, the thermal conductivity of the moving heat-conducting medium is greater than 0, and the speed is greater than 0.

[0009] Preferably, the heat conducting plate is made of a uniform heat conducting material, and the heat conducting plate and the moving heat conducting medium are in the same plane.

[0010] Preferably, the thermal conductivity of the moving heat-conducting medium in the four control areas is the same, and the thermal conductivity of the target area is equal to the thermal conductivity of the heat-conducting plate.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This structure exhibits directionally selective thermal regulation: when heat flows horizontally into the structure, the four control zones create a heat-focusing effect within the target area; when heat flows vertically into the structure, the four control zones create a heat-shielding effect within the target area. Different thermal regulation effects can be achieved for heat flows incident from different directions, and these effects can be controlled based on the speed, direction, and magnitude of the moving heat-conducting medium.

[0013] The present invention can be used for selective thermal regulation of heat flows in different directions on a chip, such as cooling in one direction and collecting waste heat in another direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 is a schematic diagram of the thermal control structure of Example 1 of the present invention;

[0016] Figure 2 This is the temperature field distribution diagram of the numerical simulation when the heat flux is incident on the structure in the horizontal direction (from left to right) in Example 1:

[0017] Figure 3 is a simulated line diagram of the temperature gradient amplitude distribution of the target area on the cut line y=0 when the heat flux is incident on the structure in the horizontal direction (from left to right) in Example 1;

[0018] Figure 4 This is the temperature field distribution diagram of the numerical simulation when the heat flux is incident on the structure in the vertical direction (from top to bottom) in Example 1:

[0019] Figure 5 is a simulated line diagram of the temperature gradient amplitude distribution of the target area on the cross-section x=0 when the heat flux is incident on the structure in the vertical direction (from top to bottom) in Example 1;

[0020] Figure 6is a schematic diagram of the thermal control structure of Example 2 of the present invention;

[0021] Figure 7 This is the temperature field distribution diagram of the numerical simulation when the heat flux is incident on the structure in the horizontal direction (from left to right) in Example 2:

[0022] Figure 8 is a simulated line diagram of the temperature gradient amplitude distribution of the target area on the section line y=0 when the heat flux is incident on the structure in the horizontal direction (from left to right) in Example 2;

[0023] Figure 9 This is the temperature field distribution diagram of the numerical simulation when the heat flux is incident on the structure in the vertical direction (from top to bottom) in Example 2:

[0024] Figure 10 This is a simulated line diagram of the temperature gradient amplitude distribution of the target area on the cross-section x=0 when the heat flux is incident on the structure in the vertical direction (from top to bottom) in Example 2.

[0025] In the figure: 1-heat conducting plate; 1.1-target area. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention are clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other implementations derived by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0027] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention. It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0028] Example 1:

[0029] A heat regulation structure with directional selectivity includes a heat conducting plate 1 and a moving heat conducting medium. The heat conducting plate 1 has four regulation areas filled with the moving heat conducting medium. The moving heat conducting medium moves directionally in the regulation areas. The central area surrounded by the four regulation areas serves as the target area 1.1 for heat regulation. The four regulation areas are separated in pairs. The four regulation areas are divided into two groups, each group includes two relatively arranged regulation areas, and the two regulation areas of one group are sandwiched between the two regulation areas of the other group. The moving heat conducting medium in the two regulation areas of one group moves in a direction away from the target area 1.1 for heat regulation, and the moving heat conducting medium in the two regulation areas of the other group moves in a direction toward the target area 1.1 for heat regulation.

[0030] The control areas are rectangular, with the short sides of the two control areas in the same group aligned. The short sides of the two control areas in the outer clamped group are aligned with the outer long sides of the two control areas in the inner clamped group. The two control areas in the same group are symmetrical with respect to the center of the target area 1.1.

[0031] The material of the heat conducting plate 1 is thermally conductive with a thermal conductivity of 394 W·m -1 ·K -1 The heat conducting plate 1 and the moving heat conducting medium are in the same plane, and the moving direction of the moving heat conducting medium is Figure 1 The direction of the arrow in , and keep the direction fixed;

[0032] In this embodiment, the left and right control areas are sandwiched between the upper and lower control areas.

[0033] Specifically:

[0034] like Figure 1 As shown in the figure, the speed direction of the moving heat-conducting medium filled in the left and right control areas is designed to converge toward the target area 1.1 of thermal control, and the speed is 0.5m / s; the speed direction of the moving heat-conducting medium filled in the upper and lower control areas is designed to depart from the target area of thermal control, and the speed is 0.2m / s; the thermal conductivity of the moving heat-conducting medium in the four areas is 0.6W·m -1 ·K -1 The area surrounded by the four moving heat-conducting media is the target area 1.1 for thermal regulation, and its thermal conductivity is the same as that of the background heat-conducting material.

[0035] In this embodiment, the short sides of the upper and lower control areas are equal to 1 / 2 of the long sides of the left and right control areas, the short sides of the left and right control areas are both twice the short sides of the target area 1.1, the short sides of the left and right control areas are equal to 1 / 2 of their long sides, and the interval between the upper control area and the left control area is 1 / 8 of the long side of the left control area.

[0036] Figure 2 、 Figure 4 This is the numerical simulation result of the directionally selective thermal control structure designed in this example (the temperature field distribution is drawn in grayscale). Figure 2 This is the case where the heat flux is incident on the structure in the horizontal direction (from left to right), and the upper and lower boundaries are adiabatic boundaries; Figure 4 This is the case where the heat flow is incident on the structure in the vertical direction (from top to bottom), and the left and right boundaries are adiabatic boundaries. Figure 2 It can be seen that when the heat flux is incident on the structure in the horizontal direction, the temperature field in the target area is significantly compressed (a thermal focusing effect is obtained); Figure 4 It can be seen that when the heat flux is incident on the structure in the vertical direction, the temperature field in the target area becomes uniform (the gradient of the temperature field is smoothed, and the effect of thermal stealth is achieved).

[0037] Figure 3 、 Figure 5 It is a simulated line diagram of the temperature gradient amplitude distribution of the target area of thermal regulation on the cross section y=0 or x=0. Figure 1 The vertical dashed line is the transversal x=0, and the horizontal dashed line is the transversal y=0.

[0038] in, Figure 3 This is a simulated line diagram of the temperature gradient amplitude distribution of the target area on the cut line y=0 when the heat flow is incident on the structure in the horizontal direction (from left to right). At this time, the temperature gradient amplitude of the target area 1.1 is significantly improved compared with that without the structure; Figure 5 It is a simulated line diagram of the temperature gradient amplitude distribution of the target area on the cross section x=0 when the heat flux is incident on the structure in the vertical direction (from top to bottom). At this time, the temperature gradient amplitude of the target area 1.1 is reduced by nearly 50% compared with that without using this structure.

[0039] Example 2:

[0040] like Figure 6 As shown, the difference between Example 2 and Example 1 is that the upper and lower control areas are sandwiched between the left and right control areas.

[0041] Figure 7 、 Figure 9 This is the numerical simulation result of the directionally selective thermal control structure designed in this example (the temperature field distribution is drawn in grayscale). Figure 7 This is the case where the heat flux is incident on the structure in the horizontal direction (from left to right), and the upper and lower boundaries are adiabatic boundaries; Figure 9 This is the case where the heat flow is incident on the structure in the vertical direction (from top to bottom), and the left and right boundaries are adiabatic boundaries. Figure 7It can be seen that when the heat flux is incident on the structure in the horizontal direction, the temperature field in the target area is significantly compressed (a thermal focusing effect is obtained); Figure 9 It can be seen that when the heat flux is incident on the structure in the vertical direction, the temperature field in the target area becomes uniform (the gradient of the temperature field is smoothed, and the effect of thermal stealth is achieved).

[0042] Figure 8 、 Figure 10 It is a simulated line diagram of the temperature gradient amplitude distribution of the target area of thermal regulation on the cross section y=0 or x=0. Figure 6 The vertical dotted line is the intersection of x=0, and the horizontal dotted line is the intersection of y=0. Figure 8 This is a simulated line diagram of the temperature gradient amplitude distribution of the target area on the cut line y=0 when the heat flow is incident on the structure in the horizontal direction (from left to right). At this time, the temperature gradient amplitude of the target area 1.1 is significantly improved compared with that without the structure; Figure 10 This simulated line graph shows the temperature gradient amplitude distribution of the target area at the intersection x = 0 when heat flux is incident vertically (from top to bottom) on the structure. In this case, the temperature gradient amplitude of the target area 1.1 is reduced compared to when the structure is not used. The simulation results show that the directionally selective thermal control structure designed in this invention has a focusing effect on horizontally incident heat flux and a thermal shielding effect on vertically incident heat flux.

[0043] The foregoing description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be readily conceived by a person skilled in the art within the technical scope disclosed herein should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A heat regulating structure with directional selectivity, characterized in that: it comprises a heat conducting plate (1) and a moving heat conducting medium, the heat conducting plate (1) having four regulating areas filled with the moving heat conducting medium, the moving heat conducting medium moving directionally in the regulating areas, a central area surrounded by the four regulating areas serving as a target area (1.1) for heat regulation, and the four regulating areas being separated in pairs; The four control areas are divided into two groups, each group includes two control areas set opposite to each other, and the two control areas of one group are sandwiched between the two control areas of the other group; in the two control areas of one group, the moving heat conduction medium is along the direction away from the target area of thermal control ( 1.1), and the moving heat-conducting media in the two control areas of the other group all move in the direction toward the target area (1.1) of thermal control.

2. The directionally selective thermal control structure according to claim 1, characterized in that: The control area is rectangular, and the short sides of the two control areas in the same group are aligned; The short sides of the two control areas of the group clamped on the outside are respectively flush with the outer long sides of the two control areas of the other group clamped on the inside.

3. The directionally selective thermal control structure according to claim 2, wherein: The two regulatory regions in the same group are symmetrical relative to the center of the target region (1.1).

4. The directionally selective thermal control structure according to claim 1, wherein: The heat conducting plate (1) is made of a uniform heat conducting material, and the heat conducting plate (1) and the moving heat conducting medium are in the same plane.

5. The directionally selective thermal control structure according to claim 1, characterized in that: The thermal conductivity of the moving heat-conducting medium is greater than 0, and the speed is greater than 0.

6. The directionally selective thermal control structure according to claim 1, characterized in that: The thermal conductivity of the moving heat-conducting medium in the four control areas is the same, and the thermal conductivity of the target area (1.1) is equal to the thermal conductivity of the heat-conducting plate (1).

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