TWI843332B - Temperature balancing plate and manufacturing method thereof - Google Patents

Abstract

The present invention proposes a temperature averaging plate and a manufacturing method thereof, wherein the temperature averaging plate comprises a first plate body and a second plate body, a chamber, a channel, a first through-hole, a sealing tube body, a first extrusion piece, and a working fluid, wherein the inner wall surface of the sealing tube body at the position corresponding to the first extrusion piece is in contact with each other. The manufacturing method of the temperature averaging plate comprises the following steps in sequence: sealingly joining the first joint surface of the first plate body to the second joint surface of the second plate body; inserting a sealing tube body into the channel so that a working fluid enters the chamber through the sealing tube body, and then forming a vacuum in the chamber; setting a first extrusion piece at the first through-hole, and extruding the sealing tube body until the inner wall surface thereof is in contact with each other. As a result, the present invention does not need to set a protrusion outside the plate body surface to implement closure, which can save volume.

Description

Heat balancing plate and manufacturing method thereof

This invention is about a heat transfer element, in particular about a heat sink.

Vapor chamber is a common heat dissipation device. It is widely used in electronic products because it takes up little space and can conduct heat over a large area. The working principle of the vapor chamber is that the working fluid in the chamber convects and produces phase change under low pressure conditions, thereby transferring heat energy from high temperature to low temperature.

In the traditional manufacturing process, after the two plates are sealed, the conduit can be extended from the opening into the chamber to draw low pressure, then inject the working fluid, and then seal the opening. After this step, the conduit is cut off from the opening and then sealed by welding. As shown in Figure 11, in order to avoid affecting the heat conduction effect of the working fluid in the chamber, this opening is designed in the form of a protrusion 91. However, this protrusion 91 has caused serious design inconveniences in many electronic products with limited volume and high part space requirements. Specifically, electronic product manufacturers must plan a space to accommodate the protrusion 91, and spend more money to open molds and manufacture parts to correspond to its appearance.

In view of this, proposing a better improvement solution is an urgent problem to be solved in this industry.

The main purpose of this invention is to propose a temperature averaging board and its manufacturing method, which does not require a protrusion outside the board body to seal the inner chamber of the temperature averaging board, which facilitates the internal design of the product using the temperature averaging board and saves space.

To achieve the above-mentioned purpose, the temperature equalization plate proposed in the invention comprises: a first plate body and a second plate body, wherein the first plate body comprises: a first groove bottom surface, which is spaced apart from the second plate body; a first inner wall surface, which surrounds and connects to the first groove bottom surface, and is not parallel to the first groove bottom surface; a first joint surface, which surrounds and connects to the first inner wall surface; an outer wall surface, which surrounds and connects to the outer side of the first joint surface, and is not parallel to the first joint surface; and a groove portion, which is formed on the first joint surface, connected to the first inner wall surface and the outer wall surface, and is recessed in a direction away from the second plate body; and the first The two plates include: a second joint surface, the first joint surface is sealed and joined to the second joint surface; a chamber formed between the first groove bottom surface, the first inner wall surface and the second plate; a channel formed between the second plate and the groove and connected to the chamber; a first through hole formed in the groove and connected to the channel; a sealing tube penetrated in the channel; a first extrusion piece fixed to the first through hole and the first extrusion piece is attached to the sealing tube, and the sealing tube is attached to the inner surface of the tube at the position corresponding to the first extrusion piece; and a working fluid is arranged in the chamber.

To achieve the above-mentioned purpose, the invention proposes another temperature-averaging plate, which has: a first plate body and a second plate body, wherein the first plate body comprises: a first groove bottom surface, which is spaced apart from the second plate body; a first inner wall surface, which surrounds and connects to the first groove bottom surface, and is not parallel to the first groove bottom surface; a first joint surface, which surrounds and connects to the first inner wall surface; an outer wall surface, which surrounds and connects to the outer side of the first joint surface, and is not parallel to the first joint surface; and a groove portion, which is formed on the first joint surface, connected to the first inner wall surface and the outer wall surface, and is recessed in a direction away from the second plate body; and the The second plate includes: a second joint surface, the first joint surface is sealed and joined to the second joint surface; a chamber formed between the first groove bottom surface, the first inner wall surface and the second plate; a channel formed between the second plate and the groove and connected to the chamber; a second through hole formed in the second plate and connected to the channel; a sealing tube penetrated in the channel; a second extrusion piece, which is arranged in the second through hole and the second extrusion piece is attached to the sealing tube, and the sealing tube is attached to the inner surface of the tube at the position corresponding to the second extrusion piece; and a working fluid, which is arranged in the chamber.

This invention also proposes a method for manufacturing a temperature balancing plate, which is used to manufacture the aforementioned temperature balancing plate, and includes the following steps in sequence: sealingly joining a first joint surface of a first plate body to a second joint surface of a second plate body, and forming a channel and a chamber between the first plate body and the second plate body, wherein the channel is connected to the chamber, and the first plate body is formed with a first through hole, which is connected to the channel; inserting a sealed tube body into the channel, and allowing a working fluid to enter the chamber from the sealed tube body, and forming a vacuum state in the chamber through the sealed tube body; A first extrusion piece is set at the first through hole, and the sealed tube body is extruded to fit the inner surface of the tube corresponding to the position of the first extrusion piece on the sealed tube body, thereby forming a sealed state in the chamber.

Therefore, the advantage of this invention is that the extrusion parts are used to seal the sealing tube through the perforations in the surface of the temperature-averaging plate, so there is no need to protrude a part outside the plate surface for closing during manufacturing. In this way, related products using this invention as a component can save space to accommodate other components.

The temperature equalizing plate as described above, wherein: the groove portion includes: an expansion area, which is located in the middle section of the groove portion; an inner groove area, which connects the first inner wall surface and the expansion area; and an outer groove area, which connects the expansion area and the outer wall surface; wherein the width of the expansion area is greater than the width of the inner groove area and the outer groove area, and the first through hole is connected to the expansion area.

As described above, the temperature equalizing plate, wherein the first extrusion member is fixed to the first through hole in a tight fit.

As described above, the first plate further has: a heat dissipation groove, which is located on a surface of the first plate away from the second plate and is recessed toward the second plate. The heat dissipation groove is used to increase the area of contact with the object to be dissipated.

The temperature equalizing plate as described above, wherein: the second plate body further has: a second groove bottom surface, which is spaced apart from the first plate body; and a second inner wall surface, which surrounds and connects to the second groove bottom surface, and the second joint surface surrounds and connects to the second inner wall surface, and the second inner wall surface and the second groove bottom surface are not parallel to each other; Wherein, the chamber is formed between the first groove bottom surface, the first inner wall surface, the second groove bottom surface, and the second inner wall surface.

As described above, the second plate body further has: a groove cover portion, which is formed on the second joint surface and is concave in a direction away from the first plate body corresponding to the position of the groove portion, so that the channel is formed between the groove portion and the groove cover portion.

The temperature equalizing plate as described above further comprises: a second through hole formed in the second plate body and connected to the channel; and a second extrusion piece fixedly arranged in the second through hole and the second extrusion piece is attached to the sealing tube body; wherein the sealing tube body is attached to the inner surface of the tube at the position corresponding to the second extrusion piece.

As described above, the manufacturing method of the temperature averaging plate, wherein the second plate body is formed with a second through hole, and the second through hole is connected to the channel; the manufacturing method of the temperature averaging plate further comprises the following steps: a second extrusion piece is arranged at the second through hole, and the sealing tube body is extruded until the inner surface of the sealing tube body corresponding to the position of the second extrusion piece is in contact with each other.

10: First plate

11: Bottom of the first groove

12: First inner wall surface

13: First joint surface

131: Groove

1311: Expansion Zone

1312: Inner trench area

1313: Outer trench area

14: Outer wall

15: Heat sink

20: Second plate

21: Bottom of the second groove

22: Second inner wall surface

23: Second joint surface

231: Groove cover

30: First piercing

31: Second piercing

40: First extrusion piece

41: Second extrusion piece

50: Sealing tube body

60: Chamber

70: Channel

91: protrusion

Figure 1 is a three-dimensional schematic diagram of the temperature equalization plate of this creation.

Figure 2 is a bottom view of the temperature equalizing plate of this invention.

Figure 3 is a three-dimensional exploded diagram of the temperature equalizing plate of this creation.

Figure 4 is a top view of the first plate in the temperature equalization plate of this invention.

Figure 5 is a top view of the first plate body when the sealed tube body is placed in the channel in the temperature equalization plate of this invention.

Figure 6 is a schematic side cross-sectional view of the channel at section A-A in the temperature equalizing plate of Figure 2 of this work.

Figure 7 is a schematic side cross-sectional view of a channel in another embodiment of the temperature equalizing plate of this invention.

Figure 8 is a schematic diagram of the step of "sealing the first plate and the second plate" in the manufacturing method of this invention.

Figure 9 is a schematic diagram of the step of "inserting the sealing tube between the first plate and the second plate" in the manufacturing method of this invention.

Figure 10 is a schematic diagram of the step of "using the first extrusion piece and/or the second extrusion piece to extrude and seal the tube body until it is tightly fitted" in the manufacturing method of this invention.

Figure 11 is a three-dimensional schematic diagram of the prior art.

First, please refer to Figures 1 to 6. This invention proposes a temperature equalization plate, which has a first plate body 10, a second plate body 20, a first through hole 30, a second through hole 31, a first extrusion member 40, a second extrusion member 41, a sealing tube 50, a chamber 60, a channel 70 and a working fluid.

The first plate 10 includes a first groove bottom surface 11, a first inner wall surface 12, a first joint surface 13, a groove 131, an outer wall surface 14, and a heat sink 15. The first groove bottom surface 11 is spaced apart from the second plate 20. The first inner wall surface 12 surrounds and connects the first groove bottom surface 11, and is not parallel to the first groove bottom surface 11. The first joint surface 13 surrounds and connects the first inner wall surface 12. The outer wall surface 14 surrounds and connects the outer side of the first joint surface 13, and is not parallel to the first joint surface 13. In this embodiment, the first inner wall surface 12 is perpendicular to the first groove bottom surface 11 and the first joint surface 13. In other words, the first groove bottom surface 11 and the first joint surface 13 are parallel to each other, but this is not limited to this; in other embodiments, the first groove bottom surface 11 may not be parallel to the first joint surface 13. Specifically, the first groove bottom surface 11 and the first inner wall surface 12 may form a groove with a bottom depth variation relative to the first joint surface 13.

The groove 131 is formed on the first joint surface 13, connected to the first inner wall surface 12 and the outer wall surface 14, and is recessed in a direction away from the second plate body 20. The groove 131 includes an expansion area 1311, an inner groove area 1312, and an outer groove area 1313. The expansion area 1311 is located in the middle section of the groove 131. The inner groove area 1312 connects the first inner wall surface 12 and the expansion area 1311. The outer groove area 1313 connects the expansion area 1311 and the outer wall surface 14. The width of the expansion area 1311 is greater than the width of the inner groove area 1312 and the outer groove area 1313, and the first through hole 30 is connected to the expansion area 1311.

The heat sink 15 is located on a surface of the first plate 10 away from the second plate 20 and is recessed toward the second plate 20. It is used to increase the area of contact with the object to be cooled. For example, the central processing unit of a computer can be placed therein and fit its shape to increase the contact area and achieve the effect of increasing the heat dissipation efficiency. In other embodiments, the first plate 10 may not have the heat sink 15.

The second plate 20 includes a second groove bottom surface 21, a second inner wall surface 22, a second joint surface 23, and a groove cover 231. The second groove bottom surface 21 is spaced apart from the first plate 10. The second inner wall surface 22 surrounds and is connected to the second groove bottom surface 21. The second joint surface 23 surrounds and is connected to the second inner wall surface 22, and the first joint surface 13 is sealed and joined to the second joint surface 23. Similarly, the second inner wall surface 22 and the second groove bottom surface 21 are not parallel to each other. In this embodiment, the second inner wall surface 22 is perpendicular to the second groove bottom surface 21, but is not limited thereto. Similarly, in other embodiments, the second groove bottom surface 21 and the second inner wall surface 22 may form a groove having a bottom depth variation relative to the second joint surface 23. In other embodiments, the second plate 20 may not have a second inner wall surface 22 and a second groove bottom surface 21.

The groove cover 231 is formed on the second joint surface 23 at a position relative to the groove 131 of the first plate 10, and is recessed in a direction away from the first plate 10. Thus, the channel 70 is formed between the groove cover 231 and the groove 131. In other embodiments, the second plate 20 may not have the groove cover 231, and in this case, the channel 70 is formed between the groove 131 and the second plate 20.

In this embodiment, the chamber 60 is formed between the first groove bottom surface 11, the first inner wall surface 12, the second groove bottom surface 21, and the second inner wall surface 22. In other embodiments in which the second plate body 20 does not have the second inner wall surface 22 and the second groove bottom surface 21, the chamber 60 is formed between the first groove bottom surface 11, the first inner wall surface 12, and the second plate body 20. The working fluid is located in the chamber 60.

The first through hole 30 is formed in the expansion area 1311 of the groove 131 of the first plate 10 and is connected to the channel 70. The first extrusion piece 40 is fixed in the first through hole 30. In this embodiment, the first extrusion piece 40 is fixed in the first through hole 30 in a tight fit, but it is not limited to this. In other embodiments, the first extrusion piece 40 can also be fixed in the first through hole 30 by welding.

The second through hole 31 is formed in the second plate 20 and connected to the channel 70. The second extruding member 41 is fixed in the second through hole 31. Similarly, in this embodiment, the second extruding member 41 is fixed in the second through hole 31 in a tight fit. In addition, in this embodiment, the first through hole 30 corresponds to the position of the second through hole 31, but it is not limited to this; in other embodiments, the first through hole 30 may not correspond to the position of the second through hole 31.

Next, please refer to Figures 5 to 7. The sealing tube body 50 is inserted into the channel 70, and the first extruder 40 and the second extruder 41 are both attached to the sealing tube body 50. In addition, the inner surface of the tube of the sealing tube body 50 is attached at a position corresponding to the first extruder 40; similarly, the inner surface of the tube of the sealing tube body 50 is attached at a position corresponding to the second extruder 41. Specifically, the sealing tube body 50 in the present embodiment is sealed and attached at the portion squeezed by the first extruder 40 and the second extruder 41. Due to the deformation caused by squeezing, the width of the sealing tube body 50 in the attached portion is expanded, and the expansion area 1311 in the groove 131 of the first plate body 10 is used to accommodate the portion of the sealing tube body 50 with the expanded width. In other words, the width change of the groove 131 corresponds to the width change of the sealing tube 50, thereby accommodating the sealing tube 50 squeezed by the first squeezing member 40 and the second squeezing member 41. In other embodiments, there may be only the first through hole 30 and the first squeezing member 40, or only the second through hole 31 and the second squeezing member 41.

Next, please refer to Figures 8 to 10. In this embodiment, the manufacturing of the temperature equalization plate of this invention includes the following steps in sequence: sealing the first plate 10 and the second plate 20, inserting the sealing tube 50 between the first plate 10 and the second plate 20, and squeezing the sealing tube 50 with the first extrusion piece 40 and/or the second extrusion piece 41 until it is tightly fitted.

In the step of "sealing the first plate 10 and the second plate 20", the first joint surface 13 of the first plate 10 is first sealed and joined to the second joint surface 23 of the second plate 20. At this time, the chamber 60 and the channel 70 are formed between the first plate 10 and the second plate 20. The first plate 10 is formed with a first through hole 30, and the second plate 20 is formed with a second through hole 31. The chamber 60 and the channel 70 are connected.

In the step of "inserting the sealing tube 50 between the first plate 10 and the second plate 20", a sealing tube 50 is inserted into the channel 70 and passed into the chamber 60, and then a working fluid is allowed to enter the chamber 60 from the sealing tube 50, and then a vacuum state is formed in the chamber 60 through the sealing tube 50.

In the step of "using the first extrusion piece 40 and/or the second extrusion piece 41 to squeeze the sealing tube 50 until it is tightly fitted", the first extrusion piece 40 is respectively set in the first through hole 30, and the second extrusion piece 41 is set in the second through hole 31, and the sealing tube 50 is squeezed by the first extrusion piece 40 and the second extrusion piece 41 at the same time until the inner surfaces of the sealing tube 50 corresponding to the first extrusion piece 40 and the second extrusion piece 41 are in contact with each other, thereby blocking the connection inside the sealing tube 50, and further blocking the connection of the channel 70, so that the chamber 60 forms a sealed state.

In other embodiments, in the step of "using the first extrusion piece 40 and/or the second extrusion piece 41 to squeeze the sealing tube 50 until it is tightly fitted", when there are only the first through hole 30 and the first extrusion piece 40 or only the second through hole 31 and the second extrusion piece 41, the first extrusion piece 40 can be placed in the first through hole 30 and the sealing tube 50 can be squeezed toward the second plate 20. Extrusion and support on the other side with a mold, or the second extrusion piece 41 can be placed in the second through hole 31 to extrude the sealing tube 50 toward the first plate 10 and support on the other side with a mold until the sealing tube 50 is in contact with the inner surface of the first extrusion piece 40 or the second extrusion piece 41, and finally the chamber 60 can be sealed.

Finally, the excess exposed portion of the sealing tube 50 is cut off, that is, the portion of the sealing tube 50 protruding from the outer wall surface 14 is cut off, and solder can be used to further seal it by welding, but it is not limited to this.

In summary, during the manufacturing process of the heat spreader of the invention, the first through hole 30 within the plate surface of the first plate 10 of the heat spreader and/or the second through hole 31 within the plate surface of the second plate 20 are squeezed and closed by the first extrusion piece 40 and/or the second extrusion piece 41, so there is no need to protrude a portion outside the first plate 10 and the second plate 20 for closing. In this way, the related products using the heat spreader of the invention as a heat dissipation element can save space to accommodate other elements.

10: First plate

20: Second plate

41: Second piercing

50: Sealing tube body

Claims (10)

A temperature-averaging plate, comprising: a first plate body and a second plate body, wherein the first plate body comprises: a first groove bottom surface, which is spaced apart from the second plate body; a first inner wall surface, which surrounds and connects to the first groove bottom surface, and is not parallel to the first groove bottom surface; a first joint surface, which surrounds and connects to the first inner wall surface; an outer wall surface, which surrounds and connects to the outer side of the first joint surface, and is not parallel to the first joint surface; and a groove portion, which is formed on the first joint surface, connected to the first inner wall surface and the outer wall surface, and is recessed in a direction away from the second plate body; and the second plate body comprises: a second joint surface, the first joint surface is sealed and joined to the second joint surface; a chamber, which is formed between the first groove bottom surface, the first inner wall surface and the second plate body; A channel formed between the second plate and the groove and connected to the chamber; A first through hole formed in the groove and connected to the channel; A sealing tube penetrated in the channel; A first extrusion piece fixed to the first through hole and affixed to the sealing tube, and the sealing tube is affixed to the inner surface of the tube corresponding to the position of the first extrusion piece; and A working fluid is disposed in the chamber. The temperature equalization plate as described in claim 1, wherein: The groove portion includes: An expansion zone located in the middle section of the groove portion; An inner groove zone connecting the first inner wall surface and the expansion zone; and An outer groove zone connecting the expansion zone and the outer wall surface; Wherein, the width of the expansion zone is greater than the width of the inner groove zone and the outer groove zone, and the first through hole is connected to the expansion zone. A temperature equalizing plate as described in claim 1, wherein the first extrusion piece is fixed to the first through hole in a tight fit. The temperature equalizing plate as described in claim 1, wherein the first plate body further has: A heat dissipation groove, which is located on a surface of the first plate body away from the second plate body and is recessed toward the second plate body, and the heat dissipation groove is used to increase the area of contact with the object to be dissipated. The temperature equalizing plate as described in claim 1, wherein: The second plate body further has: A second groove bottom surface, which is spaced apart from the first plate body; and A second inner wall surface, which surrounds and connects to the second groove bottom surface, and the second joint surface surrounds and connects to the second inner wall surface, and the second inner wall surface and the second groove bottom surface are not parallel to each other; Wherein, the chamber is formed between the first groove bottom surface, the first inner wall surface, the second groove bottom surface, and the second inner wall surface. The temperature equalizing plate as described in claim 1, wherein the second plate body further has: A groove cover portion, which is formed on the second joint surface and is recessed in a direction away from the first plate body corresponding to the position of the groove portion, so that the channel is formed between the groove portion and the groove cover portion. The temperature equalizing plate as described in claim 1 further comprises: a second through hole formed in the second plate body and connected to the channel; and a second extrusion piece fixed to the second through hole and the second extrusion piece is attached to the sealing tube body; wherein the sealing tube body is attached to the inner surface of the tube at the position corresponding to the second extrusion piece. A temperature-averaging plate, comprising: a first plate body and a second plate body, wherein the first plate body comprises: a first groove bottom surface, which is spaced apart from the second plate body; a first inner wall surface, which surrounds and connects to the first groove bottom surface, and is not parallel to the first groove bottom surface; a first joint surface, which surrounds and connects to the first inner wall surface; an outer wall surface, which surrounds and connects to the outer side of the first joint surface, and is not parallel to the first joint surface; and a groove portion, which is formed on the first joint surface, connected to the first inner wall surface and the outer wall surface, and is recessed in a direction away from the second plate body; and the second plate body comprises: a second joint surface, the first joint surface is sealed and joined to the second joint surface; a chamber, which is formed between the first groove bottom surface, the first inner wall surface and the second plate body; A channel formed between the second plate and the groove and connected to the chamber; A second through hole formed in the second plate and connected to the channel; A sealing tube penetrating the channel; A second extrusion piece disposed in the second through hole and affixed to the sealing tube, and the sealing tube is affixed to the inner surface of the tube corresponding to the position of the second extrusion piece; and A working fluid disposed in the chamber. A method for manufacturing a temperature-averaging plate comprises the following steps in sequence: Sealing a first joint surface of a first plate body to a second joint surface of a second plate body, and forming a channel and a chamber between the first plate body and the second plate body, wherein the channel is connected to the chamber, and the first plate body is formed with a first through hole, which is connected to the channel; Inserting a sealed tube body into the channel, and allowing a working fluid to enter the chamber from the sealed tube body, and forming a vacuum state in the chamber through the sealed tube body; Placing a first extrusion piece at the first through hole, and at the same time extruding the sealed tube body to fit the inner surface of the tube corresponding to the position of the first extrusion piece on the sealed tube body, thereby forming a sealed state in the chamber. The manufacturing method of the temperature balancing plate as described in claim 9, wherein the second plate body is formed with a second through hole, and the second through hole is connected to the channel; the manufacturing method of the temperature balancing plate further comprises the following steps: A second extrusion piece is arranged at the second through hole, and the sealing tube body is extruded until the inner surface of the sealing tube body corresponding to the position of the second extrusion piece is in contact with each other.

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