HEAT PIPE STRUCTURE

Abstract

A heat pipe structure includes a main body. The main body has an internal airtight chamber. At least one capillary structure is disposed on a wall face of the airtight chamber. A working fluid is filled in the airtight chamber. The main body has at least one stress concentration section. A retaining reinforcement member is disposed on the capillary structure corresponding to the stress concentration section for reinforcing the capillary structure and securely retaining the capillary structure on the wall face. When the heat pipe is flexed, bent and deformed, the retaining reinforcement member serves to prevent the capillary structure disposed on the stress concentration section from cracking or damaging.

Claims

1. A heat pipe structure comprising a main body, the main body having an internal airtight chamber, at least one capillary structure being disposed on a wall face of the airtight chamber, a working fluid being filled in the airtight chamber, the main body having at least one stress concentration section, a retaining reinforcement member being disposed on the capillary structure corresponding to the stress concentration section.

2. The heat pipe structure as claimed in claim 1, wherein the stress concentration section is positioned on one of the portions of a deformed portion of the main body or a reworked portion of the main body after formed and a flexed, bent and deformed portion of the main body.

3. The heat pipe structure as claimed in claim 1, wherein the capillary structure is selected from a group consisting of multiple channels, sintered powder body and mesh body, the retaining reinforcement member is coated and connected on a surface of the capillary structure of the airtight chamber corresponding to the stress concentration section or inlaid or embedded in the capillary structure.

4. The heat pipe structure as claimed in claim 1, wherein the main body, the capillary structure and the retaining reinforcement member are made of a material selected from a group consisting of copper, aluminum, stainless steel, titanium, titanium alloy and aluminum alloy, the main body, the capillary structure and the retaining reinforcement member being made of the same material or different materials.

5. The heat pipe structure as claimed in claim 1, wherein the working fluid is selected from a group consisting of coolant, acetone, pure water and alcohol.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:

[0011] FIG. 1 is a sectional view of a first embodiment of the heat pipe structure of the present invention; and

[0012] FIG. 2 is a sectional view of a second embodiment of the heat pipe structure of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Please refer to FIG. 1, which is a sectional view of a first embodiment of the heat pipe structure of the present invention. As shown in the drawing, the heat pipe structure of the present invention includes a main body 1.

[0014] The main body 1 can be a one-piece main body or composed of an upper plate body and a lower plate body correspondingly mated with each other. The main body 1 has an internal airtight chamber 11. At least one capillary structure 12 is disposed on a wall face of the airtight chamber 11. A working fluid 2 is filled in the airtight chamber 11. The main body 1 has at least one stress concentration section 13. A retaining reinforcement member 3 is disposed the capillary structure 12 corresponding to the stress concentration section 13.

[0015] The stress concentration section 13 of the main body 1 is mainly formed for the reason that after an external force is applied to the main body 1, the main body 1 is flexed, bent and deformed in adaptation to the arrangement space or position. For example, in the case the main body 1 is pressed and flattened from a circular configuration into a flat configuration, the stress concentration section 13 is positioned at the round angle portion of the junction between the flat face and the arc face of the main body 1 or the over-extended plane face of the main body 1 or the bent portion of the main body 1. The capillary structure 12 correspondingly disposed on the stress concentration section 13 will be damaged due to stress concentration.

[0016] The main body 1, the capillary structure 12 and the retaining reinforcement member 3 are made of a material selected from a group consisting of copper, aluminum, stainless steel, titanium, titanium alloy, aluminum alloy and plastic material. The main body 1, the capillary structure 12 and the retaining reinforcement member 3 can be made of the same material or different materials. The working fluid 2 is selected from a group consisting of coolant, acetone, pure water and alcohol.

[0017] In this embodiment, the capillary structure 12 is selected from a group consisting of sintered powder body, channels, mesh body and fiber body. In this embodiment, the capillary structure 12 is, but not limited to, sintered powder body for illustration purposes. The retaining reinforcement member 3 is coated on the surface of the capillary structure 12 (sintered powder body) of the stress concentration section 13 of the main body 1 or embedded in the capillary structure 12. When the main body 1 is pressurized by the external force and deformed (flexed and bent), the retaining reinforcement member 3 can fully hold and retain the surface of the capillary structure 12 disposed on the stress concentration section 13. Accordingly, the capillary structure 12 (sintered powder body) is prevented from cracking and detaching from the wall face of the airtight chamber 11. In this case, the capillary structure 12 in the airtight chamber 11 can keep complete to fully maintain the two-phase fluid working in the heat pipe structure.

[0018] Please refer to FIG. 2, which is a sectional view of a second embodiment of the heat pipe structure of the present invention. The second embodiment is partially identical to the first embodiment in structure and thus will not be redundantly described hereinafter. The second embodiment is different from the first embodiment in that the capillary structure 12 is multiple channels. The retaining reinforcement member 3 is coated and connected on the surface of the capillary structure 12 disposed on the stress concentration section 13 of the airtight chamber 11. The retaining reinforcement member 3 also serves to limit the width of the channels, whereby when the external force is applied to the main body 1 and the main body 1 is plastically deformed, the capillary structure 12 (channels) in the airtight chamber 11 is prevented from being over-deformed (compressed and minified or over-expanded). Accordingly, the capillary structure 12 can keep the capillary attraction.

[0019] In the second embodiment, the capillary structure 12 is multiple channels. The retaining reinforcement member 3 is coated and connected on the surface of the airtight chamber 11 corresponding to the stress concentration section 13. The retaining reinforcement member 3 serves to limit the width of the channels so as to prevent the channels from being over-deformed.

[0020] In the above first and second embodiments, the capillary structure 12 is connected with the retaining reinforcement member 3 by means of plainly attaching the retaining reinforcement member 3 onto the surface of the capillary structure 12. Alternatively, the retaining reinforcement member 3 can be disposed inside the single-layer capillary structure 12 as a skeleton, whereby the capillary structure 12 encloses the retaining reinforcement member 3. Still alternatively, multiple layers of capillary structures 12 are selectively employed and the retaining reinforcement member 3 is interposed between the capillary structures 12 as an integral body. Still alternatively, various capillary structures 12 are laminated and the retaining reinforcement member 3 is sandwiched between the capillary structures 12 and connected therewith as an integral body. Still alternatively, the retaining reinforcement member 3 is first disposed on the surface of the airtight chamber 11 of the main body 1 and then the capillary structure 12 is disposed thereon. According to the above arrangement, the retaining reinforcement member 3 provides higher strength and support for the capillary structure 12 to more securely and tightly retain the capillary structure 12 on the wall face of the airtight chamber 11. Therefore, when the main body 1 is bent or twisted to lead to concentration of stress, the capillary structure 12 is prevented from damaging and cracking to cause deterioration of the capillary efficiency or failure of the capillary structure 12.

[0021] In the present invention, when the main body 1 is flexed, bent and deformed, a stress concentration section is apt to be formed on the flexed, bent and deformed portion of the main body. The retaining reinforcement member 3 is disposed on the capillary structure 12 correspondingly disposed on the stress concentration section 13 to reinforce the internal capillary structure 12. The stress concentration section of the main body 1 is often formed on the bent portion, over-extended or over-stretched portion of the main body 1 or the turning corner portion of the main body 1 after compressed. With respect to the main body 1 itself, the stress concentration can be eliminated by means of guide angle or guide round angle. However, the capillary structure 12 inside the main body 1 cannot be processed by this means. Therefore, the retaining reinforcement member 3 is connected with the capillary structure 12 on the stress concentration section 13 to enhance the strength of the capillary structure 12 so as to improve the shortcoming of the conventional heat pipe structure.

[0022] The present invention has been described with the above embodiments thereof and it is understood that many changes and modifications in such as the form or layout pattern or practicing step of the above embodiments can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims.