HEAT TRANSFER PLATE AND HEAT PIPE MOUNTING STRUCTURE AND METHOD

Abstract

A metal heat transfer plate and heat pipe mounting structure includes a metal heat transfer plate and heat pipes embedded in the metal heat transfer plate in a flush manner. The metal heat transfer plate and heat pipe mounting method includes the steps of punching mounting slots in a metal heat transfer plate, processing each mounting slot into a respective flanged hole, reversely stamping each flanged hole to form top and bottom protruding flanges around each mounting slot, stamping each bottom protruding flange to create an insertion chamber, and press-fitting a flat heat pipe into each mounting slot and then stamping each top protruding flange into a respective deformed top protruding flange to wrap about one respective heat pipe and to keep each deformed top protruding flange flush with the top surface of the metal heat transfer plate and each heat pipe.

Claims

1. A metal heat transfer plate and heat pipe mounting structure, comprising: a metal heat transfer plate comprising at least one mounting slot cut through opposing top and bottom surfaces thereof, a top protruding flange upwardly protruding from the top surface thereof around each said mounting slot, a bottom protruding flange downwardly protruding from the bottom surface thereof around each said mounting slot, and an insertion chamber defined in each said mounting slot within an inner wall of the respective said bottom protruding flange; and at least one flat heat pipe respectively press-fitted into the insertion chamber in one respective said mounting slot in said metal heat transfer plate; wherein each said top protruding flange is deformed to wrap about one said heat pipe in the respective said insertion chamber to keep each deformed said top protruding flange flush with said metal heat transfer plate and each said heat pipe.

2. The metal heat transfer plate and heat pipe mounting structure as claimed in claim 1, wherein said bottom protruding flange around each said mounting slot in said metal heat transfer plate has a predetermined height defined as A, each said heat pipe has a predetermined thickness defined as B, said metal heat transfer plate has a predetermined thickness defined as C, and A+CB.

3. The heat transfer plate and heat pipe mounting structure as claimed in claim 1, wherein said metal heat transfer plate further comprises at least one thin strip suspending at a bottom side of each said mounting slot for supporting each said heat pipe in the insertion chamber in one respective said mounting slot.

4. The metal heat transfer plate and heat pipe mounting structure as claimed in claim 3, wherein each said thin strip is connected between two opposite lateral sides of one said mounting slot.

5. A metal heat transfer plate and heat pipe mounting method, comprising the steps of: (1) punching at least one mounting slot in a metal heat transfer plate to create at least one thin strip at a bottom side of each created said mounting slot; (2) employing stamping and extruding techniques to process each said mounting slot into a respective flanged hole having an elongated flange at one side of said metal heat transfer plate; (3) reversely stamping each said flanged hole to form a top protruding flange and a bottom protruding flange at opposing top and bottom surfaces of said metal heat transfer plate around each said mounting slot; (4) stamping each said bottom protruding flange to create an insertion chamber in each said mounting slot so that each created said insertion chamber is surrounded by one respective said top protruding flange and one respective said bottom protruding flange and at least one said thin strip; and (5) press-fitting one flat heat pipe into each said mounting slot in the metal heat transfer plate to let each said flat heat pipe be supported on at least one said thin strip, and then stamping each said top protruding flange around each said mounting slot into a respective deformed top protruding flange to wrap about one respective said heat pipe and to keep each said deformed top protruding flange flush with the top surface of said metal heat transfer plate and each said heat pipe.

6. The metal heat transfer plate and heat pipe mounting structure as claimed in claim 3, wherein said metal heat transfer plate further comprises at least one extension strip extended from each said thin strip and connected to a border area of one respective said mounting slot or to another said thin strip.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG. 1 is an oblique top view of a metal heat transfer plate and heat pipe mounting structure in accordance with a first embodiment of the present invention.

[0014] FIG. 2 is an exploded view of the metal heat transfer plate and heat pipe mounting structure in accordance with the first embodiment of the present invention.

[0015] FIG. 3 is a schematic sectional view of the first embodiment of the present invention before installation of the heat pipe in the metal heat transfer plate.

[0016] FIG. 4 corresponds to FIG. 3, illustrating the heat pipe installed in the metal heat transfer plate.

[0017] FIG. 5 is an exploded view of a metal heat transfer plate and heat pipe mounting structure in accordance with a second embodiment of the present invention.

[0018] FIG. 6 is a sectional side view of the metal heat transfer plate and heat pipe mounting structure in accordance with the second embodiment of the present invention.

[0019] FIG. 7 is a manufacturing flow chart of the first embodiment of the present invention.

[0020] FIG. 8 illustrates mounting slots formed in the metal heat transfer plate after the first step of the metal heat transfer plate and heat pipe mounting method in accordance with the present invention.

[0021] FIG. 9 is a sectional view of the metal heat transfer plate shown in FIG. 8.

[0022] FIG. 10 illustrates flanged holes formed in the metal heat transfer plate after the second step of the metal heat transfer plate and heat pipe mounting method in accordance with the present invention.

[0023] FIG. 11 is a sectional view of the metal heat transfer plate shown in FIG. 10.

[0024] FIG. 12 illustrates top and bottom protruding flanges formed on the metal heat transfer plate after the third step of the metal heat transfer plate and heat pipe mounting method in accordance with the present invention.

[0025] FIG. 13 is a sectional view of the metal heat transfer plate shown in FIG. 12.

[0026] FIG. 14 is a sectional view of the metal heat transfer plate after the fourth step of the metal heat transfer plate and heat pipe mounting method in accordance with the present invention.

[0027] FIG. 15 is a sectional view illustrating the fifth step of the metal heat transfer plate and heat pipe mounting method in accordance with the present invention.

[0028] FIG. 16 is a sectional view illustrating the metal heat transfer plate and heat pipe mounting structure finished after the fifth step of the metal heat transfer plate and heat pipe mounting method in accordance with the present invention.

[0029] FIG. 17 is a manufacturing flow chart of the second embodiment of the present invention.

[0030] FIG. 18 is top view of a metal heat transfer plate and heat pipe mounting structure in accordance with a third embodiment of the present invention.

[0031] FIG. 19 is a sectional view taken long line a-a of FIG. 18.

[0032] FIG. 20 is a sectional view taken along line b-b of FIG. 18.

[0033] FIG. 21 is an exploded view of the metal heat transfer plate and heat pipe mounting structure in accordance with the third embodiment of the present invention.

[0034] FIG. 22 is a sectional assembly view of FIG. 21.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0035] Referring to FIGS. 1-4, a metal heat transfer plate and heat pipe mounting structure in accordance with a first embodiment of the present invention is shown. As illustrated, the heat transfer plate and heat pipe mounting structure comprises a metal heat transfer plate 1 and at least one, for example, a plurality of heat pipes 2.

[0036] The metal heat transfer plate 1, before mounting with the at least one heat pipe, comprises at least one, for example, a plurality of mounting slots 11 cut through opposing top and bottom surfaces thereof, an insertion chamber 113 defined in each mounting slot 11, a top protruding flange 111 upwardly protruding from the top surface of the metal heat transfer plate 1 around each mounting slot 11, and a bottom protruding flange 112 downwardly protruding from the bottom surface of the metal heat transfer plate 1 around each mounting slot 11 (see FIG. 3). Further, the insertion chamber 113 is defined within an inner wall of the bottom protruding flange 112.

[0037] The heat pipes 2 are flat pipes mating with the mounting slots 11 of the metal heat transfer plate 1.

[0038] When fastening the metal heat transfer plate 1 and the heat pipe 2 to constitute the heat transfer plate and heat pipe mounting structure, each heat pipe 2 is inserted into the insertion chamber 113 in one respective mounting slot 11 of the metal heat transfer plate 1, and a stamping technique is employed to deform the top protruding flange 111 of each mounting slot 11, forcing the deformed top protruding flange 111 to wrap about a border area of the respective heat pipe 2 while keeping the deformed top protruding flange 111 flush with the top surface of the metal heat transfer plate 1 and the heat pipe 2 (see FIG. 4).

[0039] The flat heat pipes 2 have a thickness about 0.6 mm. The metal heat transfer plate 1 has a thickness in the range of 0.30.5 mm. The bottom protruding flange 112 around each mounting slot 11 has a height A approximately equal to the thickness B (about 0.6 mm) of the heat pipe minus the thickness C of the metal heat transfer plate 1 (about 0.30.5 mm), and therefore, the height A of the bottom protruding flange 112 is in the range of 0.30.1 mm, i.e., A=BC (i.e., A+C=B).

[0040] In actual application, the height A can be properly increased to fit the requirements.

[0041] Therefore, it can be defined as: A+CB.

[0042] Similarly, the height of the top protruding flange 111 around each mounting slot 11 is approximately equal to the height of the bottom protruding flange 112, however, after the top protruding flange 111 is stamped into a deformed top protruding flange 111, the deformed top protruding flange 111 is wrapped about the heat pipe 2 and kept flush with the surface of the heat pipe 2.

[0043] According to the present first embodiment, the height A of the bottom protruding flange 112 is in the range of 0.30.1 mm. After the heat pipes 2 are embedded in the metal heat transfer plate 1, the heat pipes 2 are tightly secured to the metal heat transfer plate 1, and the total thickness of the finished metal heat transfer plate and heat pipe mounting structure is the same as the thickness of the heat pipe 2 for low profile application, and therefore the invention is practical for use in any of a variety of light, thin, compact electronic devices.

[0044] However, the thickness of the metal heat transfer plate 1 or the thickness of the heat pipes 2 are not limited to the aforesaid specifications, i.e., the thickness of the metal heat transfer plate 1 and the thickness of the heat pipes 2 can be changed to meet different application requirements.

[0045] In a second embodiment of the present invention, as illustrated in FIG. 5 and FIG. 6, the metal heat transfer plate 1 of the metal heat transfer plate and heat pipe mounting structure further comprises a plurality of thin strips 114 transversely connected between two opposite lateral sides of each mounting slot 11 for supporting one respective heat pipe 2 in the insertion chamber 113 in one respective mounting slot 11 (see FIG. 6), and thus, each heat pipe 2 can be tightly secured in position in the respective mounting slot 1.

[0046] Actually, the aforesaid thin strips 114 are respectively connected between two opposite lateral sides of the bottom protruding flange 112 around each mounting slot 11 to support the bottom side of each heat pipe 2 in the respective insertion chamber 113.

[0047] Referring to FIG. 7, a metal heat transfer plate and heat pipe mounting method for making the aforesaid metal heat transfer plate and heat pipe mounting structure in accordance with the first embodiment of the present invention comprises five processing steps.

[0048] Step I: Punch one or a plurality of mounting slots 11 in the metal heat transfer plate 1 (see FIG. 8 and FIG. 9).

[0049] Step II (flanged hole creation): Employ stamping and extruding techniques to process each mounting slot 11 of the metal heat transfer plate 1 into a respective flanged hole 10 (see FIG. 10 and FIG. 11) having an elongated flange at one side of the metal heat transfer plate 1.

[0050] Step III: Stamp each flanged hole 10 in the reversed direction, causing formation of a top protruding flange 111 and a bottom protruding flange 112 at opposing top and bottom surfaces of the metal heat transfer plate 1 around each mounting slot 11 (see FIG. 12 and FIG. 13).

[0051] Step IV: Stamp the bottom protruding flange 112 of each mounting slot 11 to create an insertion chamber 113 in each mounting slot 11, enabling each created insertion chamber 113 to be surrounded by the respective top and bottom protruding flanges 111;112 (see FIG. 14).

[0052] Step V: Press-fit each flat heat pipe 2 into one respective mounting slot 11 in the metal heat transfer plate 1 (see FIG. 15), and then stamp the top protruding flange 111 around each mounting slot 11 into a respective deformed top protruding flange 111 to wrap about the respective heat pipe 2, keeping each deformed top protruding flange 111 flush with the top surface of the metal heat transfer plate 1 and each heat pipe 2 (see FIG. 16).

[0053] Referring to FIG. 17, the metal heat transfer plate and heat pipe mounting method for making the aforesaid metal heat transfer plate and heat pipe mounting structure in accordance with the second embodiment of the present invention is substantially similar to the aforesaid first embodiment with the exception that punching one or a plurality of mounting slots 11 in the metal heat transfer plate 1 in Step I simultaneously creates at least one thin strip 114 at a bottom side of each mounting slot 11, thus, after each flat heat pipe 2 is press-fitted into one respective mounting slot 11 in the metal heat transfer plate 1 and then the top protruding flange 111 is stamped around each mounting slot 11 into a respective deformed top protruding flange 111 to wrap about the respective heat pipe 2, each heat pipe 2 is supported on at least one thin strip 114 (see FIG. 6), thus enhancing positioning stability of each heat pipe 2 in the metal heat transfer plate 1.

[0054] Referring to FIGS. 18-22, a metal heat transfer plate and heat pipe mounting structure in accordance with a third embodiment of the present invention is shown. According to this embodiment, thin strips 114 are transversely connected between two opposite lateral sides of each mounting slot 11 and suspending at the bottom side of the metal heat transfer plate 1; the extension strips 115 are respectively extended from the thin strips 114 and connected to the border area of each mounting slot 11 or between two of the thin strips 114. After one heat pipe 2 is press-fitted into one respective mounting slot 11 in the metal heat transfer plate 1, the thin strips 114 and the extension strips 115 support each installed heat pipe 2 in each respective mounting slot 11 firmly in place (see FIG. 22).

[0055] Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.