CN1627032A - Thin plate heat pipe and manufacturing method thereof - Google Patents

Abstract

The present invention provides a thin plate heat pipe and a manufacturing method thereof. The manufacturing method comprises first cutting two metal thin plates into an upper thin plate and a lower thin plate that can be relatively combined, coating an adhesive material on the relative peripheral position of any thin plate, and then consolidating the upper thin plate and the lower thin plate into a thin plate assembly with a hollow chamber, and then sealing the upper thin plate and the lower thin plate with the adhesive material, and then filling the hollow chamber with a working fluid and degassing it, and finally performing a sealing operation; the thin plate heat pipe comprises a thin plate assembly, a working fluid and a capillary structure.

Description

Thin plate heat pipe and manufacturing method thereof

technical field

The invention relates to a heat pipe, in particular to a thin-plate heat pipe and its manufacturing method.

Background technique

As shown in Figure 1, it is Taiwan Patent No. 510490 "Heat Pipe Structure". In order to manufacture the heat pipe 10, a metal hollow base pipe 102 with an opening (not shown) and an inner cavity 101 is firstly constructed. After injecting an appropriate amount of working fluid 103 into the hollow base tube 102 from the opening, the hollow base tube 102 is evacuated and then sealed (that is, the opening of the hollow base tube 102 is sealed).

But in fact, when the round pipe surface of the heat pipe 10 is placed on a heat source (such as the top plane of a CPU (not shown)), only a small-area temperature transfer surface can be formed, and there is a temperature transfer effect. Poor shortcoming; Moreover, another kind of usage mode is that a plurality of heat pipes 10 are vertically arranged in a base 201 of a heat dissipation fin assembly 20 as shown in FIG. Place the large contact surface area on the CPU30 as shown in Figure 3 to increase the temperature transfer surface. In this way, although the aforementioned shortcoming of insufficient temperature transfer surface can be solved, in fact, the heat temperature of the CPU30 is firstly obtained by the heat conduction effect. The poor heat transfer of the base 20 is then dissipated through the heat pipe 10 with good heat conduction effect, but still has the disadvantage of poor heat transfer effect.

In addition, as shown in Figure 4, it is an existing flat heat pipe 40. When the flat heat pipe 40 is placed on the CPU 30 for heat transfer, although it has the advantages of rapid temperature transfer and large temperature transfer surface area. Accelerate the effect of heat conduction, but in fact, there is a design that is too thick and does not meet the "light and thin" design. Facing notebook computers... and other digital devices that emphasize lightness and portability, it is not suitable for the above figures. The shortcomings in the internal space of the equipment relatively limit its practical value.

Contents of the invention

Therefore, the object of the present invention is to provide a method for manufacturing a thin-plate heat pipe.

Another object of the present invention is to provide a thin-plate heat pipe with high practical value that meets the characteristics of "light, thin, short, and small".

The manufacturing method of thin-plate heat pipe according to the present invention is applicable to thin metal plates, comprising the following steps:

(A) Cutting the thin plate: cutting the two metal thin plates into an upper thin plate and a lower thin plate that can be combined relatively;

(B) Coating the bonding material: coating the bonding material at the relative peripheral position of any thin plate;

(C) Combining thin plates: making the upper thin plate and the lower thin plate consolidated into a thin plate assembly formed with a hollow cavity;

(D) connecting thin plates: making the adhesive material seal the upper thin plate and the lower thin plate;

(E) Filling and degassing operations: filling and degassing the hollow chamber of the sheet assembly with working fluid, so that the hollow chamber is in a vacuum state; and

(F) Sealing operation.

In addition, the thin-plate heat pipe of the present invention includes a thin-plate assembly, a working fluid, and a capillary structure; the thin-plate assembly includes an upper thin plate and a lower thin plate that are correspondingly combined, and one is covered by the upper thin plate and the lower thin plate. A hollow chamber is defined, the lower thin plate has a plurality of through-holes formed through it, the upper thin plate has an outer ring portion located at the periphery of the upper thin plate, a convex portion surrounded by the outer ring portion and formed by a bulge, and a plurality of Corresponding to the perforated block fixed on the lower thin plate, the convex part has a groove formed by a plurality of depressions, and the bottom of the groove can just be stuck against a top surface of the lower thin plate to form a supporting structure; the working Fluid is filled in the hollow cavity of the thin plate assembly; the capillary structure is formed in the hollow cavity of the thin plate assembly.

In addition, the thin-plate heat pipe of the present invention includes a thin-plate assembly, two side covers, a working fluid, and a capillary structure; the thin-plate assembly is an extruded integral structure, and includes a hollow chamber that defines a a plate body, a front open end and a rear open end located on two opposite sides of the plate body, and a support structure vertically arranged in the hollow chamber, the support structure is composed of a plurality of support rib groups; the two sides The cover is respectively sealed on the front open end and the rear open end of the thin plate assembly; the working fluid is filled in the hollow chamber of the thin plate assembly; the capillary structure is formed in the hollow chamber of the thin plate assembly.

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

Description of drawings

FIG. 1 is a cross-sectional view of Taiwan Patent No. 510490 "Heat Pipe Structure".

FIG. 2 is a schematic diagram of the use of Taiwan Patent No. 510490 "Heat Pipe Structure", illustrating that many heat pipes are vertically arranged on a base of a heat dissipation fin assembly.

FIG. 3 is a schematic view of the use of Taiwan Patent No. 510490 "Heat Pipe Structure", illustrating that a base of the cooling fin assembly is attached to a CPU.

FIG. 4 is a schematic view of the use of a conventional flat heat pipe, illustrating that the flat heat pipe is placed on a CPU for heat transfer.

5 is a three-dimensional exploded view of the first preferred embodiment of the thin-plate heat pipe of the present invention, illustrating that a thin-plate assembly at least includes an upper thin plate, a lower thin plate and a filling and degassing pipe.

FIG. 6 is a perspective view of the first preferred embodiment.

FIG. 7 is a composite cross-sectional view taken along line 7-7 of FIG. 6. FIG.

FIG. 8 is a schematic view of a degassing process in the first preferred embodiment.

Fig. 9 is a schematic view of the first preferred embodiment used in the sealing and sealing process.

10 is a three-dimensional exploded view of the second preferred embodiment of the thin-plate heat pipe of the present invention, illustrating that a thin-plate assembly includes at least an upper thin plate and a lower thin plate, and the upper thin plate has a degassing hole.

Fig. 11 is a three-dimensional exploded view of the third preferred embodiment of the thin-plate heat pipe of the present invention, illustrating that the thin-plate heat pipe at least includes a thin-plate assembly, two cover plates and a degassing filling pipe, and the thin-plate assembly is extruded Compression-formed one-piece metal structure.

Fig. 12 is a perspective view of the third preferred embodiment.

Fig. 13 is an assembled cross-sectional view taken along line 13-13 of Fig. 12, illustrating a plurality of straight grooves formed on the surface of a hollow chamber of the sheet assembly.

14 is a three-dimensional appearance view of the fourth preferred embodiment of the thin-plate heat pipe of the present invention, illustrating that a plate body of a thin-plate assembly has a degassing hole.

FIG. 15 is a flow chart of a preferred embodiment of the manufacturing method of the thin-plate heat pipe of the present invention.

Fig. 16 is a schematic diagram of the action of a preferred embodiment of the manufacturing method of the thin-plate heat pipe, illustrating that the degassing hole of the upper thin plate can be sealed by a sealing mechanism, which includes a chamber, a glass, a O-rings, a laser device, a sphere supply device and a degassing device.

Detailed ways

Example 1

For convenience of description, in the following embodiments, similar components are denoted by the same reference numerals.

As shown in Figures 5, 6 and 7, the first preferred embodiment of the thin-plate heat pipe 1 of the present invention includes a thin-plate assembly 2, a working fluid 3, and a capillary structure.

The thin plate assembly 2 includes a rectangular lower thin plate 21 and an upper thin plate 22 correspondingly combined, a hollow chamber 23 bounded by the lower thin plate 21 and the upper thin plate 22, and a chamfered corner of 45° 24, and a filling and degassing pipe 25 installed between the lower thin plate 21 and the upper thin plate 22, which is located at the corner 24 and communicates with the hollow chamber 23; the lower thin plate 21 has a plurality of perforations 211 formed through; The upper thin plate 22 has an outer ring portion 221 located at the periphery of the upper thin plate 22 , a convex portion 222 surrounded by the outer ring portion 221 and formed as a bulge, and a plurality of blocks corresponding to the perforations 211 riveted on the lower thin plate 21 223; the outer ring portion 221 can just abut against a top surface 212 of the lower thin plate 21; the convex portion 222 has a groove 2221 formed by a plurality of depressions, and the bottom of the groove 2221 can just be stuck against the lower thin plate 21 The top surface 212 of the top surface 212 forms a support structure; the working fluid 3 can be filled in the hollow chamber 23 by the filling and degassing pipe 25, and the hollow chamber 23 is in a vacuum state by degassing.

The working fluid 3 is an existing fluid with superheated evaporation and cold reduction characteristics, and is filled in the hollow chamber 23 of the sheet assembly 2 .

The capillary structure is formed in the hollow chamber 23 of the thin plate assembly 2; in this embodiment, the capillary structure is a plurality of straight grooves 4 formed on the surface of the lower thin plate 21, and may also be multiple cross grooves. (not shown in the figure), or a metal mesh placed in the hollow chamber 23 (not shown in the figure).

In addition, as shown in FIG. 8 , in practice, after the degassing action of the filling and degassing pipe 25 is completed, a clamp 5 is used to clamp the filling and degassing pipe 25 first, and then a cutting machine tool 6 is used to cut and clamp the process. Produced a flat sealing end (i.e. the sealing mouth position), and after cutting off, give the sealing seal; the sealing sealing method is to utilize the laser device as shown in Figure 9 to be welded and sealed, or to utilize glue dispensing to seal; It is worth mentioning that, with the design of the corner 24 of the thin-plate assembly 2, the filling and degassing pipe 25 after clamping, cutting, and sealing can maintain the flatness of the appearance of the thin-plate heat pipe 1 and prevent it from being damaged by external forces. To improve the practicability of spatial arrangement; the important thing is that the current thickness of the thin plate assembly 2 can reach less than 1.2mm, and it has a "light and thin" design, which can be applied to notebook computers...etc. In digital equipment, it is of great practical value; in addition, as shown in Figures 6 and 7, when a bottom plane 11 of the thin-plate heat pipe 1 of the present invention is placed on a CPU (not shown), it can also be used at a distance from A plurality of heat dissipation fins (not shown) are disposed on the side of the bottom plane 11 to assist in heat dissipation.

Example 2

As shown in Figure 10, the second preferred embodiment of the thin-plate heat pipe 1' of the present invention is different from the first preferred embodiment in that the thin-plate assembly 2' is not provided with the filling as shown in Figure 6 Degassing pipe 25, but its upper thin plate 22 has a degassing hole 224 positioned at the central position of the convex portion 222, and a filling hole (not shown) positioned at the side; in practice, first utilize a filling machine (figure (not shown) fills the working fluid (not shown) into the hollow chamber (not shown) of the thin plate assembly 2', and then uses a degasser (not shown) to connect to the degassing hole 224 Afterwards, the degassing operation is carried out; of course, the working fluid can also be degassed first and then filled; finally, a laser device (not shown) is used to weld and seal the degassing hole 224 or to seal the degassing hole 224 by dispensing, so as to obtain a sealing gas dense effect.

Example 3

As shown in FIGS. 11 and 12 , the third preferred embodiment of the thin-plate heat pipe 7 of the present invention includes a thin-plate assembly 8 , two side covers 9 , a working fluid 3 and a capillary structure.

As shown in FIG. 13 , the thin plate assembly 8 is an extruded integral metal structure, and includes a plate body 81 defining a hollow chamber 811 , and a front panel located on two opposite sides of the plate body 81 . The open end 82 and a rear open end 83, a supporting structure vertically arranged in the hollow chamber 811, and a filling and degassing pipe 85 communicating with the hollow chamber 811, the supporting structure is composed of a plurality of supporting ribs 84 groups.

The side cover 9 includes a circular concave portion 91, and a connecting portion 92 away from the circular concave portion 91; After the end 83, use a laser device (not shown) to weld and seal the gap between the connecting portion 92 and the open ends 82, 83, or use a friction welding joint (not shown) to seal the above-mentioned gap by friction welding It is also possible to place an appropriate amount of bonding material in the above-mentioned gap and then use a high-temperature furnace (not shown) to weld and seal it to obtain a sealing and airtight effect; the aforementioned filling and degassing pipe 85 is pierced behind one side of the cover 9 into the hollow chamber 811.

The working fluid 3 is an existing fluid with superheated evaporation and cold reduction characteristics, and is filled in the hollow chamber 811 of the sheet assembly 8 .

The capillary structure is formed in the hollow chamber 811 of the thin plate assembly 8; in this embodiment, the capillary structure is a plurality of straight grooves 4 formed on the surface of the hollow chamber 811, and it can also be a multiple intersection groove. slot (not shown).

Composed of the above-mentioned components, the thin-plate heat pipe 7 of the present invention can conform to the "light and thin" design, and can be applied to digital devices such as notebook computers, etc., and has great practical value.

Example 4

As shown in Figure 14, the fourth preferred embodiment of the thin-plate heat pipe 7' of the present invention is different from the third preferred embodiment in that: the thin-plate assembly 8' is not provided with the filling as shown in Figure 12 The degassing pipe 85 is further provided with a degassing hole 86 located at the center and communicating with the hollow chamber (not shown), and a filling hole (not shown) positioned at the side; its degassing method is the same as that shown in Figure 10 The degassing hole 224 is the same, and the way of filling the working fluid and sealing is also the same, so it will not be repeated here.

Example 5

As shown in Figure 15, the method for manufacturing thin-plate heat pipes 1, 1' as shown in Figures 5 and 10 includes the following steps 120-170:

Step 120 is cutting the metal sheets: cutting the two metal sheets into a lower sheet 21 and an upper sheet 22 that can be combined relatively.

Step 130 is coating an adhesive material: coating an adhesive material (not shown) on the peripheral position of the top surface of the lower sheet 21 .

Step 140 is to consolidate the thin plate: the lower thin plate 21 and the upper thin plate 22 are consolidated into a thin plate assembly 2 formed with a hollow chamber 23 as shown in FIG. 7; in this embodiment, the lower thin plate 21 and the upper thin plate 22 is fixed by riveting; the hollow chamber 23 forms a capillary structure; in this embodiment, the capillary structure is a plurality of straight grooves 4 formed on the surface of the lower thin plate 21, and can also be a multiple cross groove (not shown in the figure) shown), or a metal mesh placed in the hollow chamber 23 (not shown).

Step 150 is to connect the thin plates: make the adhesive material seal the lower thin plate 21 and the upper thin plate 22; in this embodiment, a laser device (not shown) or a high-temperature furnace (not shown) can be used to make the Then the material is welded to seal the gap between the lower thin plate 21 and the upper thin plate 22 .

Step 160 is filling and degassing operations: filling and degassing the hollow chamber 23 of the sheet assembly 2 with working fluid, so that the hollow chamber 23 is in a vacuum state; in practice, the hollow chamber 23 can be filled first The working fluid is then degassed, or the working fluid is degassed first and then filled with the working fluid; the thin-plate heat pipe 1 shown in Figure 5 uses the filling and degassing pipe 25 for filling and degassing operations; and the thin-plate heat pipe 1' shown in Figure 10 Then use the filling hole (not shown) located on the side to perform filling and degassing operations with the degassing hole 224 of the upper thin plate 22 respectively.

Step 170 is the sealing operation: keep the hollow chamber 23 after filling and degassing operations in a constant vacuum state, that is, seal the filling and degassing pipe 25 as shown in FIG. 5 , or seal the degassing hole 224 as shown in FIG. 10 .

In practice, in order to seal the filling and degassing pipe 25 as shown in FIG. 5 , a clamp 5 as shown in FIG. 8 is used to clamp and flatten the filling and degassing pipe 25 , and then a cutting machine 6 is used to cut it and produce it through the clamping process. A flat sealing end (that is, the sealing mouth part) of one of the two parts is sealed after being cut; the sealing method is to use the laser device 100 as shown in Figure 9 to weld and seal, or to use glue to seal.

In addition, as shown in FIG. 16, in order to seal the degassing hole 224 shown in FIG. 10, a sealing mechanism 110 can be used. The glass 112 on the top of the chamber 111, an O-ring 113 disposed at the bottom of the chamber 111, a laser device 114 above the chamber 111, and a laser device 114 located on two opposite sides of the chamber 111 A sphere supply device 115 and a degassing device 116; during use, after the degassing device 116 degasses the hollow chamber (not shown) of the sheet assembly 2' through the chamber 111, the sphere supply device 115 A metal ball 1151 is sent out to be stuck on the degassing hole 224, and finally the laser device 114 is used to weld and seal the degassing hole 224 to achieve a sealing and airtight effect; in practice, a glue injection device (not shown in the figure) can also be used ) filling glue to seal the degassing hole 224 to achieve a sealing and airtight effect.

In addition, in order to seal the degassing hole 224 as shown in Figure 10, a clamp (not shown) that clamps the degassing hole 224 can also be used, and then a laser device (not shown) is used to emit a high-energy laser light On the deformed part of the degassing hole 224, the end section of the deformed part can be swept off and welded at the same time to achieve the sealing airtight effect; A laser device welds and seals the degassing hole 224 to achieve a sealing and airtight effect.

Claims (26)

1. the manufacture method of a sheet type heat pipe is applicable to sheet metal, it is characterized in that comprising the following steps:

(A) cut thin plate: the upper thin sheet and the lower thin sheet that two sheet metals are cut into combination relatively;

(B) material is followed in coating: material is followed in the relative peripheral position coating at arbitrary thin plate;

(C) in conjunction with thin plate: make this upper thin sheet and this lower thin sheet be consolidated into a sheet combination body that is formed with hollow chamber;

(D) link thin plate: make this then this upper thin sheet of material involution and lower thin sheet;

(E) filling, degasification operation: filling operation fluid, degasification in the hollow chamber of this sheet combination body make this hollow chamber be vacuum state; And

(F) sealing operation.

2. the manufacture method of sheet type heat pipe as claimed in claim 1 is characterized in that:

The hollow chamber of step (C) is formed with a capillary structure.

3. the manufacture method of sheet type heat pipe as claimed in claim 2 is characterized in that:

Step (D) provide a high temperature furnace, makes this follow material and be welding between this upper thin sheet and this lower thin sheet.

4. the manufacture method of sheet type heat pipe as claimed in claim 3 is characterized in that:

The upper thin sheet in step (A) is formed with one and removes pore, and step (E) provides a getter that removes pore that can be bonded on this upper thin sheet, makes this hollow chamber be vacuum state.

5. the manufacture method of sheet type heat pipe as claimed in claim 4 is characterized in that:

The glue filling device except that the pore top that step (F) provides the spheroid feedway and that can discharge Metal Ball to be positioned at this upper thin sheet, the Metal Ball of borrowing this spheroid feedway to discharge fastens after this removes pore, utilizes airtight being somebody's turn to do of this glue filling device encapsulating to remove pore.

6. the manufacture method of sheet type heat pipe as claimed in claim 4 is characterized in that:

Step (F) provides a spheroid feedway and the laser devices that can discharge Metal Ball, the Metal Ball of borrowing this spheroid feedway to discharge fasten this upper thin sheet remove pore after, utilize that this laser devices welding is airtight should to remove pore.

7. the manufacture method of sheet type heat pipe as claimed in claim 2 is characterized in that:

Step (D) provide a laser devices, and making then, material is welding between this upper thin sheet and this lower thin sheet.

8. the manufacture method of sheet type heat pipe as claimed in claim 7 is characterized in that:

The upper thin sheet of step (A) is formed with one and removes pore, and step (E) provides a getter that removes pore that can be bonded on this upper thin sheet, makes this hollow chamber be vacuum state.

9. the manufacture method of sheet type heat pipe as claimed in claim 8 is characterized in that:

Step (F) provides a folder the flat anchor clamps that should remove pore, utilizes this laser devices to send a high-octane laser light again and removes on the deformation place of pore at this, and can sweep end segment disconnected, this deformation place of welding simultaneously.

10. the manufacture method of sheet type heat pipe as claimed in claim 8 is characterized in that:

Step (F) provides one to flatten the tool that this removes pore, utilizes airtight being somebody's turn to do of this laser devices welding to remove pore again.

11. the manufacture method of sheet type heat pipe as claimed in claim 1 is characterized in that:

The hollow chamber of the sheet combination body of step (E) is the degasification again of first filling operation fluid.

12. the manufacture method of sheet type heat pipe as claimed in claim 1 is characterized in that:

The hollow chamber of the sheet combination body of step (E) is that first degasification refills working fluid.

13. a sheet type heat pipe comprises a sheet combination body, a working fluid and a capillary structure, it is characterized in that:

This sheet combination body, the upper thin sheet and the lower thin sheet, that comprise corresponding combination coat the hollow chamber that defines by this upper thin sheet and this lower thin sheet, this lower thin sheet has the perforation that majority runs through formation, this upper thin sheet have an outer portion, that is positioned at the periphery of this upper thin sheet be subjected to this outer portion around and the protuberance of protruding grand formation, and most correspondences are cemented in the fixture block of the perforation of this lower thin sheet, this protuberance has the groove that majority is recessed to form, the bottom of this groove just can fasten the end face in this lower thin sheet, and forms a supporting construction;

This working fluid is to be filled in the hollow chamber of this sheet combination body; And

This capillary structure is to be formed in the hollow chamber of this sheet combination body.

14. sheet type heat pipe as claimed in claim 13 is characterized in that:

The upper thin sheet of this sheet combination body have more one be positioned at this protuberance middle position remove pore, carry out the degasification operation after engaging for a getter, make this hollow chamber be vacuum state.

15. sheet type heat pipe as claimed in claim 13 is characterized in that:

Comprise that more one is communicated with the filling gas removing pipe of the hollow chamber of this sheet combination body, but borrow this filling gas removing pipe and the filling operation fluid in this hollow chamber, make this hollow chamber be vacuum state with degasification.

16. sheet type heat pipe as claimed in claim 15 is characterized in that:

This sheet combination body comprises the corner of the predetermined angular of cutting sth. askew, and is ccontaining for this filling gas removing pipe.

17. sheet type heat pipe as claimed in claim 16 is characterized in that:

This corner is to cut sth. askew 45 °.

18. sheet type heat pipe as claimed in claim 13 is characterized in that:

This capillary structure is a wire netting.

19. sheet type heat pipe as claimed in claim 13 is characterized in that:

This capillary structure is one to be formed on the groove on the surface of this hollow chamber.

20. a sheet type heat pipe comprises a sheet combination body, two side covers, a working fluid and a capillary structure, it is characterized in that:

This sheet combination body, integral structure body for extrusion modling, and comprise a plate body that defines a hollow chamber, be positioned at a preceding open end and the open end, a back of two opposition sides of this plate body, reach a vertical supporting construction that is located in this hollow chamber, this supporting construction is to be made of most supporting rib groups;

This two side cover is the preceding open end and open end, back that is sealed in this sheet combination body respectively;

This working fluid is to be filled in the hollow chamber of this sheet combination body; And

This capillary structure is to be formed in the hollow chamber of this sheet combination body.

21. sheet type heat pipe as claimed in claim 20 is characterized in that:

More comprise and pass a wherein side cover, and be communicated with the filling gas removing pipe of the hollow chamber of this sheet combination body, but borrow this filling gas removing pipe and the filling operation fluid in this hollow chamber, make this hollow chamber be vacuum state with degasification.

22. sheet type heat pipe as claimed in claim 20 is characterized in that:

The upper thin sheet of this sheet combination body have more one be positioned at this protuberance middle position remove pore, carry out the degasification operation after engaging for a getter, make this hollow chamber be vacuum state.

23. sheet type heat pipe as claimed in claim 20 is characterized in that:

This capillary structure is one to be formed on the groove on the surface of this hollow chamber.

24. sheet type heat pipe as claimed in claim 20 is characterized in that:

This two side cover is the preceding open end and open end, back that is cemented in this sheet combination body earlier, utilizes a laser devices that these side covers are welded respectively again and is enclosed on this preceding open end and the open end, back.

25. sheet type heat pipe as claimed in claim 20 is characterized in that:

The preceding open end of this two side cover and this sheet combination body and back are coated with then material between the open end, and utilize a high temperature furnace, make should follow material and be welding between these side covers and this preceding open end, this open end, back.

26. sheet type heat pipe as claimed in claim 20 is characterized in that:

This two side cover is the preceding open end and open end, back that is cemented in this sheet combination body earlier, utilizes a friction welding joint that these side covers are welded respectively again and is enclosed on this preceding open end and the open end, back.

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