Loop type heat dissipation structure
By arranging the first barrier body and capillary structure in the heat pipe of the loop heat dissipation structure, the shunt of the gaseous working fluid is realized, which solves the problem of backflow resistance caused by the opposite directions of gaseous and liquid working fluids in traditional heat pipes and loop heat pipes, and improves heat dissipation. efficacy.
Patent Information
- Application Number
- CN202310895933.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-20
- Publication Date
- 2025-01-21
AI Technical Summary
During the heat dissipation process, traditional heat pipes and loop heat pipes have a return resistance caused by the flow of gaseous working fluid and liquid working fluid in the opposite direction, which affects the heat dissipation efficiency.
A loop heat dissipation structure is designed. By arranging the first barrier body and the capillary structure in the first evaporation section of the heat pipe, the gaseous working fluid is divided, the gaseous working fluid flow along the pipeline to the condensation section is reduced, and the liquid working fluid is reduced. return flow resistance.
Through the diversion of the gaseous working fluid, the reflux resistance of the liquid working fluid has been reduced, and the heat dissipation efficiency is improved. By concentrating the heat dissipation and condensation in the condensed section, the heat is quickly discharged, which further improves the heat dissipation efficiency.
Smart Images
Figure CN119342747A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a heat dissipation structure, in particular to a loop type heat dissipation structure. Background Art
[0002] Traditional heat pipes and loop heat pipes are common heat dissipation structures. Taking traditional heat pipes as an example, the working fluid absorbs heat in the evaporation section to evaporate from the liquid state to the gas state, and flows along the first direction to the condensation section. Then, the working fluid releases heat in the condensation section to condense from the gas state to the liquid state, and flows back to the evaporation section in a second direction opposite to the first direction through capillary force (for example, through the capillary structure on the tube wall). Because the gaseous working fluid and the liquid working fluid flow in opposite directions in the pipeline, the gaseous working fluid will hinder the reflux of the liquid working fluid, resulting in the failure to significantly improve the heat dissipation efficiency.
[0003] Different from traditional heat pipes, the working fluid in the loop heat pipe is a one-way flow cycle. The working fluid absorbs heat in the evaporation section to evaporate from the liquid state to the gas state, and flows along the closed loop to the condensation section. Then, the working fluid releases heat in the condensation section to condense from the gas state to the liquid state, and the liquid working fluid is pushed by the gaseous working fluid to flow from the condensation section to the evaporation section along the closed loop. However, if the flow rate of the gaseous working fluid is too fast, it will affect the effect of heat release and condensation. Conversely, if the flow rate of the gaseous working fluid is too slow, it will affect the heat dissipation efficiency, resulting in the failure to significantly improve the heat dissipation performance. Summary of the invention
[0004] According to an embodiment of the present invention, a loop heat dissipation structure includes a heat pipe, a connecting pipe and a working fluid. The heat pipe includes a pipeline, a capillary structure and a first barrier. The pipeline has a first evaporation section, a first condensation section, an outlet and an inlet, wherein the outlet is located at the edge of the first evaporation section, and the inlet is located at the edge of the first condensation section. The capillary structure is distributed on the inner wall surface of the pipeline and extends from the first condensation section to the first evaporation section. The first barrier is arranged in the first condensation section and connected to the capillary structure. One end of the connecting pipe is connected to the outlet, and the other end of the connecting pipe is connected to the inlet. The working fluid flows in the heat pipe and the connecting pipe. The working fluid evaporates from a liquid state to a gaseous state in the first evaporation section, and flows to the first condensation section along the pipeline and the connecting pipe respectively. The working fluid condenses from a gaseous state to a liquid state in the first condensation section, and flows to the first evaporation along the pipeline through the capillary structure.
[0005] Based on the above, the gaseous working fluid can be split in the first evaporation section to reduce the flow of the first gaseous working fluid flowing along the pipeline to the first condensation section, reducing the reflux resistance of the liquid working fluid in the pipeline, thereby helping to improve the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Figure 1 is a cross-sectional schematic diagram of a loop heat dissipation structure of a first embodiment of the present invention;
[0007] Figure 2 is a cross-sectional schematic diagram of a loop heat dissipation structure according to a second embodiment of the present invention;
[0008] Figure 3 is a cross-sectional schematic diagram of a loop heat dissipation structure according to a third embodiment of the present invention;
[0009] Figure 4 is a cross-sectional schematic diagram of a loop heat dissipation structure according to a fourth embodiment of the present invention;
[0010] Figure 5 is a cross-sectional schematic diagram of a loop heat dissipation structure according to a fifth embodiment of the present invention;
[0011] Figure 6 2 is a cross-sectional schematic diagram of a loop heat dissipation structure according to a sixth embodiment of the present invention. DETAILED DESCRIPTION
[0012] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.
[0013] Figure 1 This is a cross-sectional schematic diagram of the loop heat dissipation structure of the first embodiment of the present invention. Figure 1 In this embodiment, the loop heat dissipation structure 100 can be applied to a notebook computer or other electronic devices, and includes a heat pipe 110, a connecting pipe 120, and a working fluid. The heat pipe 110 is connected to the connecting pipe 120 to form a heat dissipation loop for the working fluid to flow in the heat dissipation loop.
[0014] In detail, the heat pipe 110 includes a pipeline 111, a capillary structure 112 and a first barrier 113, and the pipeline 111 has a first evaporation section 1111, a first condensation section 1112, an outlet 1113 and an inlet 1114. The capillary structure 112 is distributed on the inner wall surface of the pipeline 111 and extends from the first condensation section 1112 to the first evaporation section 1111. The first barrier 113 is disposed in the first condensation section 1112 and connected to the capillary structure 112.
[0015] In this embodiment, the outlet 1113 is located at the edge of the first evaporation section 1111, and the inlet 1114 is located at the edge of the first condensation section 1112. Specifically, the capillary structure 112 extends from the outlet 1113 along the inner wall surface of the pipeline 111 to the inlet 1114. On the other hand, one end of the connecting tube 120 is connected to the outlet 1113, and the other end of the connecting tube 120 is connected to the inlet 1114.
[0016] Further, the first evaporation section 1111 is thermally coupled to a heat source to absorb heat from the heat source. The liquid working fluid 130 absorbs heat and evaporates into a gaseous working fluid in the first evaporation section 1111, and the gaseous working fluid can be divided into a first gaseous working fluid 131 and a second gaseous working fluid 132. The first gaseous working fluid 131 can flow from the first evaporation section 1111 along the pipeline 111 to the first condensation section 1112. Conversely, the second gaseous working fluid 132 can flow out of the first evaporation section 1111 from the outlet 1113 and flow along the connecting pipe 120 toward the inlet 1114 to flow into the first condensation section 1112 through the inlet 1114.
[0017] like Figure 1 As shown, the connecting pipe 120 is used as a vapor diversion pipeline, wherein the flow direction of the first gaseous working fluid 131 and the flow direction of the second gaseous working fluid 132 are opposite to each other, and finally both flow into the first condensation section 1112. In detail, the first barrier 113 can be a capillary body, an alloy material body or a polymer material body, and maintains a distance S between it and the inlet 1114, for example, it is arranged in the center of the first condensation section 1112. Under the obstruction of the first barrier 113, the first gaseous working fluid 131 and the second gaseous working fluid 132 flowing into the first condensation section 1112 along two different flow directions respectively do not converge.
[0018] Furthermore, the first condensation section 1112 may be provided with a heat dissipation fin, a fan or a combination thereof, so that the first gaseous working fluid 131 and the second gaseous working fluid 132 release heat and condense into a liquid working fluid 130 in the first condensation section 1112. Then, the capillary structure 112 may guide the liquid working fluid 130 to flow back from the first condensation section 1112 along the pipeline 111 to the first evaporation section 1111. In other words, the flow direction of the liquid working fluid 130 is opposite to that of the first gaseous working fluid 131.
[0019] In this embodiment, the gaseous working fluid can be split in the first evaporation section 1111 to reduce the flow of the first gaseous working fluid 131 flowing along the pipeline 111 to the first condensation section 1112, and reduce the reflux resistance of the liquid working fluid 130 in the pipeline 111, so as to help improve the heat dissipation efficiency. In addition, the first gaseous working fluid 131 and the second gaseous working fluid 132 flow into the first condensation section 1112 along two different flow directions respectively, and are concentrated in the first condensation section 1112 to release heat and condense into the liquid working fluid 130, so as to quickly discharge heat, so as to help improve the heat dissipation efficiency.
[0020] like Figure 1As shown, the inner wall surface of the connecting pipe 120 is a smooth surface, which helps to reduce the flow resistance of the second gaseous working fluid 132 in the connecting pipe 120. In addition, because the inner wall surface of the pipeline 111 is provided with a capillary structure 112, the inner diameter D of the pipeline 111 is smaller than the inner diameter D1 of the connecting pipe 120, and accordingly, the flow rate of the first gaseous working fluid 131 in the pipeline 111 is smaller than the flow rate of the second gaseous working fluid 132 in the connecting pipe 120.
[0021] On the other hand, the heat pipe 110 further includes a second barrier 114, wherein the second barrier 114 is disposed in the first evaporation section 1111 and connected to the capillary structure 112. The second barrier 114 may be a capillary body, an alloy material body or a polymer material body, and has a distance S1 between it and the outlet 1113, for example, it is disposed in the center of the first evaporation section 1111. Under the barrier of the second barrier 114, it is possible to ensure that the first gaseous working fluid 131 does not flow into the connecting pipe 120, and ensure that the second gaseous working fluid 132 does not flow into the pipeline 111.
[0022] Figure 2 This is a cross-sectional schematic diagram of a loop heat dissipation structure of the second embodiment of the present invention. Figure 2 The design of the loop heat dissipation structure 100A of this embodiment is substantially the same as that of the loop heat dissipation structure 100 of the first embodiment, and the main difference between the two is that the heat pipe 110a of this embodiment is not configured with a barrier in the first evaporation section 1111, so as to automatically distribute the flow of the first gaseous working fluid 131 and the second gaseous working fluid 132 through the difference in flow resistance inside the pipeline 111 and the connecting pipe 120.
[0023] Figure 3 This is a cross-sectional schematic diagram of a loop heat dissipation structure of the third embodiment of the present invention. Figure 3 The design of the loop heat dissipation structure 100B of this embodiment is substantially the same as that of the loop heat dissipation structure 100 of the first embodiment. The main difference between the two is that the heat pipe 110b of this embodiment is further provided with at least one second condensation section 1115 (two are schematically shown) between the first evaporation section 1111 and the first condensation section 1112. In detail, the two second condensation sections 1115 are arranged side by side on the same side of the first condensation section 1112, and the two second condensation sections 1115 are not provided with a barrier to ensure that the first gaseous working fluid 131 can flow to the first condensation section 1112. On the other hand, by providing multiple condensation sections, it is helpful to improve the heat dissipation efficiency.
[0024] In one example, the first condensation section 1112 is disposed between two second condensation sections 1115 , but the present invention is not limited thereto.
[0025] Figure 4 is a cross-sectional schematic diagram of a loop heat dissipation structure of the fourth embodiment of the present invention. Figure 4 The design of the loop heat dissipation structure 100C of this embodiment is substantially the same as that of the loop heat dissipation structure 100B of the third embodiment. The main difference between the two is that the heat pipe 110c of this embodiment is further provided with at least one second evaporation section 1116 (two are schematically shown) between the first evaporation section 1111 and the first condensation section 1112. Specifically, the two second evaporation sections 1116 are arranged in parallel with the first evaporation section 1111, and the two second evaporation sections 1116 are not provided with a barrier to ensure that the first gaseous working fluid 131 can flow from the first evaporation section 1111 along the pipeline 111 to the first condensation section 1112.
[0026] In one example, the first condensation section 1112 is disposed between two second condensation sections 1115 , but the present invention is not limited thereto.
[0027] Figure 5 is a cross-sectional schematic diagram of a loop heat dissipation structure of the fifth embodiment of the present invention. Figure 5 The design of the loop heat dissipation structure 100D of this embodiment is substantially the same as that of the loop heat dissipation structure 100A of the second embodiment. The main difference between the two is that the heat pipe 110d of this embodiment is further provided with at least one second condensation section 1115 (two are schematically shown) between the first evaporation section 1111 and the first condensation section 1112. In detail, the two second condensation sections 1115 are arranged in parallel with the first condensation section 1112, and the two second condensation sections 1115 are not provided with a barrier to ensure that the first gaseous working fluid 131 can flow to the first condensation section 1112. On the other hand, by configuring multiple condensation sections, it is helpful to improve the heat dissipation efficiency.
[0028] In one example, the first condensation section 1112 is disposed between two second condensation sections 1115 , but the present invention is not limited thereto.
[0029] Figure 6 is a cross-sectional schematic diagram of a loop heat dissipation structure of the sixth embodiment of the present invention. Figure 6 The design of the loop heat dissipation structure 100E of this embodiment is roughly the same as that of the loop heat dissipation structure 100C of the fourth embodiment. The main difference between the two is that the heat pipe 110d of this embodiment is not configured with a barrier in the first evaporation section 1111, so as to automatically distribute the flow of the first gaseous working fluid 131 and the second gaseous working fluid 132 through the difference in flow resistance inside the pipeline 111 and the connecting pipe 120.
[0030] In one example, the first condensation section 1112 is disposed between two second condensation sections 1115 , but the present invention is not limited thereto.
[0031] In summary, the gaseous working fluid can generate a split flow in the first evaporation section to reduce the flow of the first gaseous working fluid flowing along the pipeline to the first condensation section, reducing the reflux resistance of the liquid working fluid in the pipeline, thus helping to improve the heat dissipation efficiency. In addition, the first gaseous working fluid and the second gaseous working fluid flow into the first condensation section along two different flow directions respectively, and are concentrated in the first condensation section to release heat and condense into liquid working fluid to quickly discharge heat, thus helping to improve the heat dissipation efficiency.
[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A loop heat dissipation structure, characterized in that: include: Heat pipe, comprising: A pipeline having a first evaporation section, a first condensation section, an outlet and an inlet, wherein the outlet is located at an edge of the first evaporation section, and the inlet is located at an edge of the first condensation section; a capillary structure distributed on the inner wall surface of the pipeline and extending from the first condensation section to the first evaporation section; and a first barrier disposed in the first condensation section and connected to the capillary structure; and a connecting pipe, wherein one end of the connecting pipe is connected to the outlet, and the other end of the connecting pipe is connected to the inlet; and A working fluid flows in the heat pipe and the connecting pipe. The working fluid evaporates from a liquid state to a gaseous state in the first evaporation section and flows to the first condensation section along the pipeline and the connecting pipe respectively. The working fluid condenses from a gaseous state to a liquid state in the first condensation section and flows to the first evaporation section along the pipeline via the capillary structure.
2. The loop heat dissipation structure according to claim 1, characterized in that: The heat pipe also includes: The second barrier is arranged in the first evaporation section and connected to the capillary structure.
3. The loop heat dissipation structure according to claim 2, characterized in that: The second barrier is spaced apart from the outlet.
4. The loop heat dissipation structure according to claim 2, characterized in that: The second barrier body includes a capillary body, an alloy material body or a polymer material body.
5. The loop heat dissipation structure according to claim 1, characterized in that: The first barrier is spaced apart from the inlet.
6. The loop heat dissipation structure according to claim 1, characterized in that: The first barrier body includes a capillary body, an alloy material body or a polymer material body.
7. The loop type heat dissipation structure according to claim 1, characterized in that: The flow rate of the working fluid in a gaseous state in the pipeline is smaller than the flow rate of the working fluid in a gaseous state in the connecting pipe.
8. The loop heat dissipation structure according to claim 1, characterized in that: The inner diameter of the pipeline is smaller than the inner diameter of the connecting pipe.
9. The loop type heat dissipation structure according to claim 1, characterized in that: The inner wall surface of the connecting pipe is a smooth surface.
10. The loop heat dissipation structure according to claim 1, characterized in that: The pipeline further has at least one second condensation section arranged in parallel with the first condensation section, and the second condensation section is located between the first condensation section and the first evaporation section.
11. The loop heat dissipation structure according to claim 1, characterized in that: The pipeline further has at least one second evaporation section arranged in parallel with the first evaporation section, and the second evaporation section is located between the first evaporation section and the first condensation section.