heat pipe

Abstract

This invention relates to the field of heat transfer technology, specifically providing a heat pipe. The heat pipe of this invention features a reflux section at the end of the condensing section furthest from the evaporating section. This reflux section allows for heat exchange with the external environment, and its reflux configuration facilitates the return of the working fluid, thereby improving heat transfer and dissipation performance. Furthermore, the powder mesh count of the first capillary structure in the evaporating section is greater than that of the second capillary structure in the condensing section, resulting in lower thermal resistance at the evaporating section, facilitating heat transfer and conduction. This also results in a larger capillary gap at the condensing section, further facilitating the return of the working fluid and improving the heat transfer and dissipation performance of the heat pipe. Moreover, the evaporating section and reflux section of this heat pipe are angled together, allowing for flexible arrangement of the heat pipe according to the actual wafer layout, thus providing good versatility and flexibility.

Claims

1. A heat pipe comprising: An evaporation section (10) includes a first tube (11) and a first capillary structure (12) disposed on the inner wall of the first tube (11); a condensation section (20) includes a second tube (21) and a second capillary structure (22) disposed on the inner wall of the second tube (21), wherein the powder mesh size of the second capillary structure (22) is smaller than that of the first capillary structure (12); and a reflux section (30) is provided at an angle to the extension direction of the evaporation section (10), wherein the reflux section (30) includes a third tube (31) and a reflux portion disposed on the inner wall of the third tube (31), wherein the first tube (11) is connected to the third tube (31) through the second tube (21).

2. The heat pipe as claimed in claim 1, wherein, The reflux section includes a plurality of reflux grooves (32) arranged circumferentially at intervals along the inner wall of the third tube (31), and the reflux grooves (32) extend to the connection between the second tube (21) and the third tube (31).

3. The heat pipe as described in claim 2, wherein, Along the direction close to the axis of the third tube (31), the cross-section of the return channel (32) gradually increases.

4. The heat pipe as described in claim 3, wherein, Along the radial direction of the heat pipe, the distance between the bottom of the reflux groove (32) and the outer wall of the third tube (31) is greater than the distance between the bottom of the second capillary structure (22) and the outer wall of the second tube (21); and / or, along the radial direction of the heat pipe, the distance between the opening of the reflux groove (32) and the outer wall of the third tube (31) is less than the distance between the top of the second capillary structure (22) and the outer wall of the second tube (21).

5. The heat pipe as claimed in claim 1, wherein, The evaporation section (10), the condensation section (20) and the reflux section (30) are provided in multiples. Along the extension direction of the heat pipe, multiple evaporation sections (10) and multiple reflux sections (30) are arranged alternately, and a condensation section (20) is provided between any two adjacent evaporation sections (10) and reflux sections (30).

6. The heat pipe as claimed in claim 5, wherein, The condensing section (20) directly connected to the evaporation section (10) includes a first condensing section (23), a second condensing section (24) and a transition section (25) connected in sequence. The extension direction of the first condensing section (23) and the extension direction of the second condensing section (24) are set at an angle. The transition section (25) is bent. The first condensing section (23) is connected to the evaporation section (10), and the second condensing section (24) is connected to the reflux section (30).

7. The heat pipe as claimed in claim 6, wherein, The evaporation section (10) is connected to a condensation section (20) at each end, and each condensation section (20) is connected to a reflux section (30).

8. The heat pipe as claimed in claim 7, wherein, The length of the first condensing section (23) is less than the length of the second condensing section (24).

9. The heat pipe as claimed in any one of claims 1 to 8, wherein, The radial thickness of the first capillary structure (12) is the same as the radial thickness of the second capillary structure (22).

10. The heat pipe as claimed in claim 9, wherein, The first tube (11), the second tube (21) and the third tube (31) are integrally formed.

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