HEAT TRANSFERRING DEVICE AND METHOD FOR MANUFACTURING THE SAME

The disclosure provides a heat transferring device and a method for manufacturing the heat transferring device. The heat transferring device includes: a flexible heat transfer substrate including a first surface, a second surface, at least one solid portion and at least one characteristic hole portion. The at least one solid portion is formed between the first surface and the second surface. The at least one characteristic hole portion includes several characteristic holes penetrating through the first surface and the second surface. The flexible heat transfer substrate further includes: a first end and a second end, and the second end is corresponding to the first end. The flexible heat transfer substrate is rolled from the first end towards the second end to form the heat transferring device with a predetermined shape.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1Ais a schematic top view of a flexible heat transfer substrate according to a first embodiment of the present disclosure.FIG. 1Bis a schematic side view of the flexible heat transfer substrate according to the first embodiment of the present disclosure. According to the first embodiment of the present disclosure, the flexible heat transfer substrate10of the present disclosure includes: a first surface11, a second surface12, at least one solid portion13and at least one characteristic hole portion14. The second surface12is corresponding to the first surface11. The flexible heat transfer substrate10may be a metal, ceramic, composite or polymer material.

The at least one solid portion13is formed between the first surface11and the second surface12, the at least one characteristic hole portion14includes several characteristic holes141and142penetrating through the first surface11and the second surface12, and the characteristic holes141and142are circular. The flexible heat transfer substrate10further includes: a first end15and a second end16, the second end16is corresponding to the first end15, where the flexible heat transfer substrate10is rolled from the first end15towards the second end16, to form a heat transferring device20(referring toFIG. 2) of a predetermined shape.

In this embodiment, the flexible heat transfer substrate10includes two solid portions13and a characteristic hole portion14, the characteristic hole portion14is disposed between the two solid portions13. The flexible heat transfer substrate10further includes several spacers17disposed on the first surface11. The spacers17have a set distance therebetween, and the spacers17are disposed in one of the two solid portions13.

FIG. 2is a schematic view of the heat transferring device according to the first embodiment of the present disclosure. As stated above, the flexible heat transfer substrate10is rolled from the first end15towards the second end16to form a cylindrical heat transferring device20. In addition to the solid portion13and the characteristic hole portion14, the heat transferring device20has a hollow portion21formed by spacing the first surface of the rolled flexible heat transfer substrate10from the second surface12due to separation of the spacers17. In this embodiment, the axis of the heat transferring device20is made by rolling the solid portion13, and is a solid structure. The hollow portion21surrounds the axis externally and axially penetrates through the heat transferring device20, so that the heat transferring device20forms a tubular structure.

The heat transferring device20of the present disclosure can use a porous structure formed by the characteristic holes of the characteristic hole portion14to increase the heat transfer surface area, so as to facilitate heat exchange and improve heat transfer efficiency. In addition, a fluid can be added to the hollow portion21, if the fluid is in a stationary state, heat transfer is mainly performed by means of thermal conduction, and the heat transfer performance is low, and has a heat-insulating function. If the fluid is in a flowing state, the heat transfer can be performed by means of thermal convection, so that the heat transfer performance is good, and has a heat dissipating or heating function. Therefore, the heat transfer performance can be controlled by controlling the flow velocity of the fluid, so that the heat transferring device20can achieve various heat transfer demands, such as heat exchange, heating, dissipating, cooling, and heat-insulating.

FIG. 3Ais a schematic top view of a flexible heat transfer substrate according to a second embodiment of the present disclosure.FIG. 3Bis a schematic side view of the flexible heat transfer substrate according to the second embodiment of the present disclosure. The difference between the flexible heat transfer substrate30according to the second embodiment of the present disclosure and the flexible heat transfer substrate10according to the first embodiment lies in that, spacers31of the flexible heat transfer substrate30according to the second embodiment of the present disclosure are disposed on two solid portions13.

FIG. 4is a schematic sectional view of the heat transferring device according to the second embodiment of the present disclosure. Referring toFIGS. 3A,3B and4, in this embodiment, a heat transferring device35according to the second embodiment is formed by rolling the flexible heat transfer substrate30. A rotary shaft of a rolling unit used for rolling the flexible heat transfer substrate30is large, so that the periphery of the axis of the heat transferring device35according to the second embodiment is formed by rolling the solid portions13and the spacers31, and thus the axis of the rolled heat transferring device35is a hollow portion32. From the center to the periphery, the structure of the heat transferring device35is the hollow portion32, the solid portion13, the characteristic hole portion14, the solid portion13, the hollow portion33and the solid portion13. In other words, the heat transferring device35is a tubular structure having two hollow portions32and33, and the two hollow portions32and33are spaced apart by the solid portion13, the characteristic hole portion14and the solid portion13. Similarly, the heat transferring device35according to the second embodiment of the present disclosure has the efficacy of the heat transferring device20in the first embodiment.

FIG. 5Ais a schematic top view of a flexible heat transfer substrate according to a third embodiment of the present disclosure.FIG. 5Bis a schematic side view of the flexible heat transfer substrate according to the third embodiment of the present disclosure. The flexible heat transfer substrate50according to the third embodiment of the present disclosure includes: a first surface51, a second surface52, three solid portions531,532and533, a characteristic hole portion54and several spacers57. The characteristic hole portion54includes several characteristic holes541and542. The characteristic hole portion54extends from the center to a first end55to separate the three solid portions531,532and533. The spacers57are disposed in the solid portion531, and in this embodiment, the spacers57are disposed between the characteristic hole portion54and an upper edge. The flexible heat transfer substrate50according to the third embodiment of the present disclosure further includes a notch portion58disposed at a second end56and a lower edge.

FIG. 6is a schematic sectional view of a heat transferring device according to the third embodiment of the present disclosure. Referring toFIGS. 5A,5B and6, in this embodiment, the heat transferring device40according to the third embodiment is formed by rolling the flexible heat transfer substrate50. The spacers57of the flexible heat transfer substrate50are rolled to make the axis of the heat transferring device40become a hollow portion41. The first end55of the flexible heat transfer substrate50rolled into the hollow portion41of the axis further includes the characteristic hole portion54and the solid portions531and532, and thus the axis of the heat transferring device40is a hollow structure, and a side face at the axis has several characteristic holes541and542. The notch portion58of the flexible heat transfer substrate50is rolled to make the periphery of the heat transferring device40also become the notch portion58. Similarly, the heat transferring device40according to the third embodiment of the present disclosure has the efficacy of the heat transferring device20in the first embodiment.

FIG. 7Ais a schematic top view of a flexible heat transfer substrate according to a fourth embodiment of the present disclosure.FIG. 7Bis a schematic side view of the flexible heat transfer substrate according to the fourth embodiment of the present disclosure. The flexible heat transfer substrate70according to the fourth embodiment of the present disclosure includes: a first surface71, a second surface72, two solid portions731and732, a characteristic hole portion74and a notch portion77. The characteristic hole portion74includes several characteristic holes741and742, and the characteristic hole portion74is disposed in the center. The solid portion731extends from a first end75to below the characteristic hole portion74. The notch portion77is disposed at a second end76and a lower edge.

FIG. 8is a schematic sectional view of a heat transferring device according to the fourth embodiment of the present disclosure. Referring toFIGS. 7A,7B and8, in this embodiment, the heat transferring device60according to the fourth embodiment is formed by rolling the flexible heat transfer substrate70, and the solid portion731of the flexible heat transfer substrate70is rolled to make the axis of the heat transferring device60become a hollow structure. Moreover, the notch portion77of the flexible heat transfer substrate70is rolled to make the periphery of the heat transferring device60also become the notch portion77. Similarly, the heat transferring device60according to the fourth embodiment of the present disclosure has the efficacy of the heat transferring device20in the first embodiment.

FIG. 9Ais a schematic top view of a flexible heat transfer substrate according to a fifth embodiment of the present disclosure.FIG. 9Bis a schematic side view of the flexible heat transfer substrate according to the fifth embodiment of the present disclosure. The flexible heat transfer substrate80is substantially identical with the third embodiment, and includes: a first surface81, a second surface82, three solid portions831,832and833, a characteristic hole portion84and several spacers87. The difference lies in that the spacers87are disposed in the characteristic hole portion84, and close to a first end85. The spacers87are materials extruding the characteristic hole portion84when the characteristic hole841is formed, and the spacers87are formed by protruding the material of the characteristic hole portion84beyond the first surface81. The schematic section view of the heat transferring device according to the fifth embodiment of the present disclosure is the same as that of the heat transferring device according to the third embodiment, which is as shown inFIG. 6, and is not repeated herein.

FIGS. 10A and 10Bare schematic views of implementation aspects of characteristic hole portions of a flexible heat transfer substrate according to the present disclosure. InFIG. 10A, the characteristic hole portion100includes several characteristic holes101and102, and the characteristic holes101and102are hexagonal. InFIG. 10B, the characteristic hole portion110includes several characteristic holes111and112, and the characteristic holes111and112are rhombic. However, in other embodiments, the characteristic holes of the characteristic hole portion may be polygonal.

FIG. 11is a schematic view of a flow chart of a method for manufacturing a heat transferring device according to the present disclosure. Referring to step S91, a flexible heat transfer substrate is provided. The flexible heat transfer substrate can refer to the above embodiments, and is not repeated herein. Referring to step S92, the flexible heat transfer substrate is processed; preferably, the step of treating the flexible heat transfer substrate includes: shock-washing 5 minutes with ultra-pure water, shock-washing 5 minutes with acetone, shock-washing 5 minutes with ultra-pure water and shock-washing with 5 minutes with alcohol, for removing residual oil in the processing of the flexible heat transfer substrate as well as solid impurities on the surface.

Referring to step S93, the first end of the flexible heat transfer substrate is fixed onto a rotary shaft of a rolling unit, and the second end of the flexible heat transfer substrate is fixed to a moving platform. A clamp can be used to clamp and fix the second end of the flexible heat transfer substrate to the moving platform. Referring to step S94, the flexible heat transfer substrate is rolled at a predetermined rotation speed to perform continuous rolling. The rolling process may include a shape setting step, as shown in step S95, a shape setting device is used, during the rolling process, to get close to the flexible heat transfer substrate so as to form a heat transferring device with the predetermined shape. Alternatively, the rotary shaft of the rolling unit having various shapes can be used to form the heat transferring device with various predetermined shapes.

In addition, the rolling process may include a tension controlling step, as shown in step S96, a tensometer is used to control tension in the rolling process, to control the tension acted upon the flexible heat transfer substrate.

In order to fix the shape of the heat transferring device, a connecting step may be included in the rolling process or after the rolling, as shown in step S97, the flexible heat transfer substrate is connected in the rolling process or after the rolling with a high-temperature furnace melting, spark plasma, resistance welding or laser welding method, to form the heat transferring device with the predetermined shape, as shown in step S98.

The method for manufacturing a heat transferring device according to the present disclosure does not use an adhesive agent and polymer materials to fix the shape of the heat transferring device. The front stage of the process can perform cleaning for the flexible heat transfer substrate, thus reducing energy consumption and having no pollution concerns.

The method for manufacturing a heat transferring device can be proceeded continuously, and does not require the use of special powders and other advanced manufacturing technologies. Therefore, the method of the disclosure can reduce the cost and price of the heat transferring device. The characteristic hole portion can use a sheet for manufacturing, and the process for manufacturing the characteristic hole portion is simple.

The method for manufacturing a heat transferring device can adjust the shape and dimension of the heat transferring device depending upon customization specifications. The heat transferring devices with various specifications can be proceeded by one method, and high performance heat transferring devices can be provided with more competitive prices to enter the thermal management market.

While several embodiments of the present disclosure have been illustrated and described, various modifications and improvements can be made by those skilled in the art. The embodiments of the present disclosure are therefore described in an illustrative but not in a restrictive sense. It is intended that the present disclosure should not be limited to the particular forms as illustrated and that all modifications which maintain the spirit and scope of the present disclosure are within the scope defined in the appended claims.