US20170082378A1

US20170082378A1 - Vapor chamber structure

Info

Publication number: US20170082378A1
Application number: US14/858,566
Authority: US
Inventors: Shih-Ming Wang; Chia-Hsun Lin
Original assignee: Chaun Choung Technology Corp
Current assignee: Nidec Chaun Choung Technology Corp
Priority date: 2015-09-18
Filing date: 2015-09-18
Publication date: 2017-03-23

Abstract

A vapor chamber structure for at least one heating element includes a main body having a heat receiving plate. The heat receiving plate has at least one wrinkled ring portion. An inner portion of the wrinkled ring portion surrounds a contact portion. The contact portion is in contact with the heating element. Thereby, one heating element provides the contact portion a thrust when the contact portion is in contact with the heating element. The wrinkled ring portion is therefore forced to deform for helping the contact portion slightly adjust its position. This ensures a tight and even contact between the contact portion and the heating element, thereby improving the heat dissipation efficiency of the vapor chamber structure.

Description

TECHNICAL FIELD

The disclosure relates to a vapor chamber, more particularly to a vapor chamber structure.

BACKGROUND

Traditionally a vapor chamber is a vacuum chamber formed by an upper metal plate and a lower metal plate welded together. The inside of the vacuum chamber comprises highly efficient heat transfer components such as a capillary structure or a working fluid. This enables the vapor chamber to quickly transfer heat of a regional heat source to a large plate for cooling, thereby making the vapor chamber a heat dissipation device of high performance.
However, the heights and thicknesses of the heat sources are slightly different from each other. Thus, when the vapor chamber is in thermal contact with multiple heat sources, the higher or thicker heat sources are likely to be against the vapor chamber. This makes the vapor chamber unable to be in contact with lower or thinner heat sources; or, when the vapor chamber is in thermal contact with multiple heat sources, the higher or thicker heat sources are likely to depress the vapor chamber, thereby resulting in an uneven surface thereof. This problem leads to poor performance regarding the heat dissipation of the vapor chamber.
Consequently, the disclosure aims to provide an improved design capable of solving the aforementioned problems.

SUMMARY

One purpose of the disclosure is to provide a vapor chamber structure in which a heating element provides the contact portion a thrust (namely a push force) when the contact portion is in contact with the heating element. The wrinkled ring portion is therefore forced to deform for helping the contact portion slightly adjust its position. This in turn ensures a tight and even contact between the contact portion and the heating element, thereby improving the heat dissipation efficiency of the vapor chamber structure.
To fulfill the purpose, the disclosure provides a vapor chamber structure which is configured for at least one heating element and comprises a main body having a heat receiving plate. The heat receiving plate has at least one wrinkled ring portion. An inner portion of the wrinkled ring portion surrounds a contact portion. The contact portion is in contact with the heating element.
The disclosure further provides the following effects:
Firstly, the main body has a condensing plate arranged in a way corresponding to the heat receiving plate. The condensing plate forms a plurality of stop sticks extending towards the heat receiving plate. Each stop stick and the contact portion abuts on each other to press the contact portion to contact the heating element more reliably, thereby improving the capability of heat dissipation of the vapor chamber structure.
Secondly, each return spring is accommodated in each stop stick and is sandwiched between the cooling fin and the stop stick. When the stop stick is pressed, the return spring gives the stop stick a return force to press each stop stick to abut on the contact portion. This ensures a more reliable contact between the contact portion and the heating element, thereby improving the heat dissipation function of the vapor chamber structure.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure will become more fully understood from the detailed description and the drawings given herein below for illustration only, and thus does not limit the disclosure, wherein:

FIG. 1 is an exploded view of the vapor chamber structure according to the first embodiment structure;

FIG. 2 is a perspective view of the assembly of the vapor chamber structure according to the first embodiment structure;

FIG. 3 is another perspective view of the assembly of the vapor chamber structure according to the first embodiment structure;

FIG. 4 is a sectional view of the vapor chamber structure according to the first embodiment structure;

FIG. 5 is a schematic view of the operation of the vapor chamber structure according to the first embodiment structure;

FIG. 6 is a schematic view of the operation of the vapor chamber structure according to the second embodiment structure;

FIG. 7 is a sectional view of the vapor chamber structure according to the third embodiment structure;

FIG. 8 is a bottom view of the vapor chamber structure according to the third embodiment structure;

FIG. 9 is a schematic view of the operation of the vapor chamber structure according to the fourth embodiment structure; and

FIG. 10 is a schematic view of the operation of the vapor chamber structure according to the fifth embodiment structure.

DETAILED DESCRIPTION

In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing.
Referring to FIG. 1 to FIG. 5, the disclosure provides a vapor chamber structure of the first embodiment. The vapor chamber structure 10 is for one or multiple heating elements and mainly comprises a main body 1.
As seen in FIG. 1 to FIG. 4, the main body 1 has a heat receiving plate 11. The heat receiving plate 11 has a plurality of wrinkled ring portions 12. An inner portion of each wrinkled ring portion 12 surrounds a contact portion 121. Each wrinkled ring portion 12 comprises a plurality of recessed ring sections 122 recessed on the heat receiving plate 11. The recessed ring sections 122 are in annular arrangement in sequence. The thickness a of each recessed ring section 122 is less than the thickness b of the heat receiving plate 11.
Specifically, the heat receiving plate 11 has a plurality of convex portions 13 protruding therefrom. Each wrinkled ring portion 12 is formed on the outer edge of each convex portion 13 while each contact portion 121 is formed on the top of each convex portion 13.
Moreover, the main body 1 has a condensing plate 14 arranged in a way corresponding to the heat receiving plate 11. The condensing plate 14 forms a plurality of stop sticks 141 extending towards each contact portion 121. A gap s is formed between each stop stick 141 and the contact portion 121. From the condensing plate 14, each stop stick 141 is formed by stamping in a direction towards the heat receiving plate 11. The inner portion of each stop stick 141 forms a concave 142 corresponding to the condensing plate 14.
Furthermore, the main body 1 comprises an upper case 15 and a lower case 16 assembled to each other. An accommodating chamber 17 is formed between the upper case 15 and the lower case 16. The heat receiving plate 11 is formed on the lower case 16 while the condensing plate 14 is formed on the upper case 15.
As seen in FIG. 1, FIG. 4 and FIG. 5, the vapor chamber structure 10 of the disclosure further comprises a capillary structure 2. The capillary structure 2 is accommodated in the accommodating chamber 17 and covers the heat receiving plate 11. The capillary structure 2 may be a particle sintered body, metal meshes, a groove or a combination thereof.
As seen in FIG. 5, the vapor chamber structure 10 of the disclosure further comprises a plurality of cooling fins 3. Each cooling fin 3 is connected to the condensing plate 14. Multiple cooling fins 3 cover the concave 142.
As seen in FIG. 4 to FIG. 5, the assembly of the vapor chamber structure 10 of the disclosure is illustrated. The main body 1 has the heat receiving plate 11 having the wrinkled ring portion 12. The inside of the wrinkled ring portion 12 surrounds and forms the contact portion 121 which is in contact with the heating element 100. Thereby, when the contact portion 121 is in contact with the heating element, the heating element 100 provides the contact portion 121 a thrust which leads to the deformation of the wrinkled ring portion 12 due to the force. This therefore help the contact portion 121 slightly adjust its position to more tightly and evenly contact the heating element 100, in order to improve the heat dissipation efficiency of the vapor chamber structure 10.
As shown in FIG. 5, in the operation of the vapor chamber structure 10 of the disclosure, each heating element 100 is in thermal contact with each contact portion 121. Moreover, each wrinkled ring portion 12 surrounds the outer edge of the contact portion 121; each wrinkled ring portion 12 comprises a plurality of recessed ring sections 122 recessed on the heat receiving plate 11; the recessed ring sections 122 are in annular arrangement in sequence; the thickness a of each recessed ring section 122 is less than the thickness b of the heat receiving plate 11. Hence, when each contact portion 121 receives the thrust of each heating element 100, the wrinkled ring portion 12 contracts or extends through the recessed ring sections 122. This then makes the contact portion slightly contract or extend, which slightly adjust the position of each contact portion to match the thickness and height of each heating element 100. Therefore, the heating elements 100 with different thicknesses and heights may tightly and evenly contact each contact portion 121, which improves the heat dissipation efficiency of the vapor chamber structure 10.
Additionally, the main body 1 has the condensing plate 14 arranged in a way corresponding to the heat receiving plate 11. The condensing plate 14 forms the plurality of stop sticks 141 extending towards each contact portion 121. When the distance of the contraction of the contact portion 121 exceeds the gap s, the contact portion 121 abuts on each stop stick 141 to push the contact portion 121 for more reliable contact between the heating element 100 and the contact portion 121. This enhances the capability regarding heat dissipation of the vapor chamber structure 10.
FIG. 6 shows the second embodiment of the vapor chamber structure 10 of the disclosure. As seen in FIG. 6, the second embodiment is similar to the first embodiment but the vapor chamber structure 10 of the second embodiment further comprises a plurality of return springs.
Specifically, the outer edge of each stop stick 141 is disposed with a shrunken ring groove 1411 and each stop stick 141 abuts on the contact portion 121. Each return spring 4 is accommodated in each concave 142 and is sandwiched between the cooling fin 3 and the stop stick 141. When the stop stick 141 is pressed, the shrunken ring groove 1411 deforms, due to the press, to reduce the height of the stop stick 141. The return spring 4, at this point, gives the stop stick 141 a return force to enable the shrunken ring groove 1411 to adjust in relation to the return spring 4, for pressing each stop stick 141 to abut on the contact portion 121. This ensures the reliable contact between the contact portion 121 and the heating element 100, thereby improving the heat dissipation capability of the vapor chamber structure 10.
FIG. 7 and FIG. 8 show the second embodiment of the vapor chamber structure 10 of the disclosure. The third embodiment is similar to the first embodiment but the heat receiving plate 11 is without the convex portion 13. The heat receiving plate 11 has a flat surface which has one or multiple wrinkled ring portions 12.
Specifically, the higher or thicker heating element 100 is in contact with the contact portion 121 while lower or thinner heating element 100 is in contact with the heat receiving plate 11. When the higher or thicker heating element 100 pushes the contact portion 121 to make it shrink, it does not affect the contact between the lower or thinner heating element 100 and the heat receiving plate 11. This way, the heating elements 100 with different thicknesses and heights may tightly and evenly contact the contact portion 121 or the heat receiving plate 11. Consequently, the third embodiment is capable of performing the same functions and yielding the same results as those of the first embodiment.
FIG. 9 shows the fourth embodiment of the vapor chamber structure 10 of the disclosure. The fourth embodiment is similar to the first embodiment but the heat receiving plate 11 of the fourth embodiment further has one or multiple convex portions 13 and one or multiple block portions 131 protruding thereform.
Specifically, the heat receiving plate 11 has one or multiple convex portions 13 and one or multiple block portions 131 protruding thereform. The heat receiving plate 11 has a convex section 111 protruding therefrom. The convex section 111 is disposed with one or multiple recessed ring grooves 112. The convex portion 13 is formed on the inside of the region surrounded by the recessed ring groove 112 while the block portion 131 is formed on the outside of the region surrounded by the recessed ring groove 112.
Thereby, a part of the heating element 100 is in contact with the contact portion 121 while the other part of the heating element 100 is in contact with the block portion 131. When the part of the heating element 100 presses the contact portion 121 to make it shrink, it does not affect the contact between the other part of the heating element 100 and the block portion 131. This way, the heating elements 100 with different thicknesses and heights may tightly and evenly contact the contact portion 121 and the block portion 131 respectively. Consequently, the fourth embodiment is capable of performing the same functions and yielding the same results as those of the first embodiment.
FIG. 10 shows the fifth embodiment of the vapor chamber structure 10 of the disclosure. The fourth embodiment is similar to the first embodiment while the difference between them lies in that the numbers of the wrinkled ring portions 12 and convex portion 13 may be one or plural.
Specifically, the lower or thinner heating element 100 is in contact with the contact portion 121 while the higher or thicker heating element 100 is in contact with the heat receiving plate 11. When the higher or thicker heating element 100 is aligned to the heat receiving plate 11 for contact, the lower or thinner heating element 100 is able to press the contact portion 121 to make it shrink. This way, the heating elements 100 with different thicknesses and heights may tightly and evenly contact the contact portion 121 and the heat receiving plate 11 respectively. Consequently, the fifth embodiment is capable of performing the same functions and yielding the same results as those of the first embodiment.

Claims

What is claimed is:

1. A vapor chamber structure, configured for at least one heating element, comprising:

a main body having a heat receiving plate, the heat receiving plate having at least one wrinkled ring portion, an inner portion of the wrinkled ring portion surrounding a contact portion, and the contact portion being in contact with the heating element.

2. The vapor chamber structure according to claim 1, wherein the heat receiving plate has at least one convex portion protruding therefrom, the wrinkled ring portion is formed on an outer edge of the convex portion while the contact portion is formed on a top of the convex portion.

3. The vapor chamber structure according to claim 1, wherein the heat receiving plate has at least one convex portion and at least one block portion protruding therefrom, the wrinkled ring portion is formed on an outer edge of the convex portion while the contact portion is formed on a top of the convex portion.

4. The vapor chamber structure according to claim 3, wherein the heat receiving plate has a convex section protruding therefrom, the convex section is disposed with at least one recessed ring groove, the convex portion is formed inside a region surrounded by the recessed ring groove while the block portion is formed outside the region surrounded by the recessed ring groove.

5. The vapor chamber structure according to claim 1, wherein the wrinkled ring portion comprises a plurality of recessed ring sections recessed on the heat receiving plate, and the recessed ring sections are in annular arrangement in sequence.

6. The vapor chamber structure according to claim 1, wherein the thickness of each recessed ring section is less than the thickness of the heat receiving plate.

7. The vapor chamber structure according to claim 1, wherein the main body has a condensing plate arranged in a way corresponding to the heat receiving plate, the condensing plate forms a plurality of stop sticks extending towards the heat receiving plate, and a gap s is formed between each stop stick and the contact portion.

8. The vapor chamber structure according to claim 1, wherein the main body has a condensing plate arranged in a way corresponding to the heat receiving plate, the condensing plate forms a plurality of stop sticks extending towards the heat receiving plate, an outer edge of each stop stick is disposed with a shrunken ring groove, and each stop stick abuts on the contact portion.

9. The vapor chamber structure according to claim 8, further comprising a plurality of cooling fins and a plurality of return springs, the inner portion of each stop stick forms a concave corresponding to the condensing plate, the cooling fins are connected to the condensing plate and cover the concave, each return spring is accommodated in each concave, and each return spring is sandwiched between the cooling fin and the stop stick.

10. The vapor chamber structure according to claim 7, wherein each stop stick is formed by stamping in a direction towards the heat receiving plate from the condensing plate, and the inner portion of each stop stick forms a concave corresponding to the condensing plate.

11. The vapor chamber structure according to claim 7, further comprising a plurality of cooling fins, wherein the cooling fins are connected to the condensing plate and cover the concave.

12. The vapor chamber structure according to claim 7, wherein the main body comprises an upper case and a lower case assembled to each other, an accommodating chamber is formed between the upper case and the lower case, the heat receiving plate is formed on the lower case while the condensing plate is formed on the upper case.

13. The vapor chamber structure according to claim 12, further comprising a capillary structure, wherein the capillary structure is accommodated in the accommodating chamber and covers the heat receiving plate.