TWI686129B - Heat dissipation module and portable electronic device - Google Patents

Abstract

The disclosure provides a heat dissipation module and a portable electronic device wherein the heat dissipation module includes a first heat pipe. The first heat pipe includes a first end part and a second end part. The second end part includes an outer circumferential wall and an inner circumferential wall. The inner circumferential wall is located inside the outer circumferential wall. A vapor channel is formed between the outer circumferential wall and the inner circumferential wall and an insertion groove is formed by the inner circumferential wall. A central axis of the insertion groove and the outer circumferential wall are spaced apart from each other by a first distance along a first direction. The central axis of the insertion groove and the outer circumferential wall are spaced apart from each other by a second distance along a second direction. The first direction is different from the second direction and the first distance is different from the second distance.

Description

Heat dissipation module and portable electronic device

The invention relates to a heat dissipation module and a portable electronic device, in particular to a heat dissipation module including a heat pipe with a slot and a portable electronic device including a heat pipe nested with each other.

With the evolution of technology in the electronics field, the performance of electronic components has been continuously improved, and the increase in performance has also increased the heat generated by electronic components. If the heat cannot be effectively removed from the electronic component, the temperature of the electronic component will increase due to the accumulation of heat, and the electronic component will be damaged due to the excessively high temperature. Therefore, in order to provide an additional heat dissipation path for electronic components, manufacturers have disposed two heat pipes that are mutually nested and relatively rotatable between the display and the mainframe, so as to use the display to help dissipate the heat generated by the electronic components in the mainframe .

However, in order to maintain a sufficiently large volume of the vapor channel of the heat pipe provided with a slot for another heat pipe to maintain the heat conduction capacity of the heat pipe, the heat pipe sleeved outside generally needs to have a larger thickness. As a result, it becomes difficult to take into account both the heat conduction ability and the thinning of the heat pipe sheathed outside.

The present invention is to provide a heat dissipation module and a portable electronic device including the heat dissipation module, so as to solve the problem that it is difficult to take into account the heat conduction capability and thinning of the heat pipe.

The heat dissipation module disclosed in an embodiment of the present invention includes a first heat pipe. The first heat pipe includes a first end and a second end opposite to each other. The second end includes an outer peripheral wall and an inner peripheral wall. The inner peripheral wall is located inside the outer peripheral wall. A steam channel is formed between the outer peripheral wall and the inner peripheral wall, and the inner peripheral wall surrounds a slot. A central axis of the slot and the outer peripheral wall maintain a first distance in a first direction. The central axis of the slot and the outer peripheral wall maintain a second distance in a second direction. The first direction is different from the second direction, and the first distance is different from the second distance.

The portable electronic device disclosed in another embodiment of the present invention includes a main body, a display body, and a heat dissipation module. The main body base includes a base and a heat source, and the heat source is disposed on the base. The display body includes a metal casing and a display module. The metal casing is pivotally connected to the base, so that the metal casing can rotate relative to the base, and the display module is disposed on the metal casing. The heat dissipation module includes a first heat pipe and a second heat pipe. The first heat pipe includes a first end and a second end opposite to each other. The second end includes an outer peripheral wall and an inner peripheral wall. The inner peripheral wall is located inside the outer peripheral wall. A steam channel is formed between the outer peripheral wall and the inner peripheral wall, and the inner peripheral wall surrounds a slot. One end of the second heat pipe is inserted into the slot and is in thermal contact with the first heat pipe, and the second heat pipe can rotate relative to the first heat pipe. One of the first end and the other end of the second heat pipe is in thermal contact with the heat source, and the other of the first end and the other end of the second heat pipe is connected to the metal housing. A central axis of the slot and the outer peripheral wall maintain a first distance in a first direction. The central axis of the slot and the outer peripheral wall maintain a second distance in a second direction. The first direction is different from the second direction, and the first distance is different from the second distance.

According to the heat dissipation module and the portable device disclosed in the above embodiments, since the central axis of the slot of the first heat pipe and the outer peripheral wall of the first heat pipe maintain different distances in different directions, that is, the first heat pipe has The flat outer peripheral wall, therefore, after the first heat pipe is thinned, the vapor passage between the outer peripheral wall and the inner peripheral wall of the first heat pipe still has a sufficiently large volume. In this way, the thermal conductivity and thinning of the heat dissipation module can be taken into account.

The above description of the content of the present invention and the description of the following embodiments are used to demonstrate and explain the principles of the present invention, and provide a further explanation of the scope of the patent application of the present invention.

Please refer to Figure 1. FIG. 1 is a perspective view of a portable electronic device according to a first embodiment of the invention.

The portable electronic device 10 includes a main body 100, a display body 200, two pivot members 250, and a heat dissipation module 300.

The main body 100 includes a base 101, a heat source 102 and a heat sink 103. The heat source is, for example, a central processing unit, and is installed in the base 101. The heat dissipation component 103 is disposed in the base 101.

The display body 200 includes a metal casing 201 and a display module 202. The metal casing 201 is pivotally connected to the base 101 through the pivoting member 250, so that the metal casing 201 can rotate relative to the base 101, so that the portable electronic device 10 is opened or closed. The display module 202 is disposed on the metal casing 201.

For example, the two pivoting members 250 may be uniaxial pivots, and each includes a first fixing portion 251, a second fixing portion 252, and a pivoting portion 253. In each pivoting member 250, the first fixing portion 251 is fixed to the base 101 of the main body 100; the second fixing portion 252 is fixed to the metal casing 201 of the display body 200; the pivoting portion 253 is pivotally connected to the first The fixing portion 251 and the second fixing portion 252 enable the second fixing portion 252 to rotate relative to the first fixing portion 251 and drive the metal casing 201 of the display body 200 to rotate relative to the base 101 of the main body 100. However, the present invention is not limited to the arrangement of the two pivotal members 250. In other embodiments, the two pivotal members may be omitted, and other structures may be used to drive the metal shell of the display body relative to the base of the main body Spin.

Please refer to Figure 2 to Figure 5. 2 is a perspective view of a heat dissipation module of a portable electronic device according to a first embodiment of the invention. FIG. 3 is an exploded schematic view of the heat dissipation module of FIG. 2. 4 is a schematic cross-sectional view of the second end of the first heat pipe of the portable electronic device according to the first embodiment of the present invention, drawn along the radial direction. FIG. 5 is a partially enlarged view of a schematic side sectional view of the heat dissipation module in FIG. 3 drawn along the axial direction.

The heat dissipation module 300 includes a first heat pipe 310 and a second heat pipe 320.

The first heat pipe 310 has a first end 311 and a second end 312 opposite to each other. For example, the first end 311 is in thermal contact with the heat source 102, and the first heat pipe 310 is in thermal contact with the heat dissipation element 103 (please refer to FIG. 1 additionally). The second end 312 includes a first outer peripheral wall 3120 and an inner peripheral wall 3121. The inner peripheral wall 3121 is located inside the first outer peripheral wall 3120, and may be tangent to the first outer peripheral wall 3120, for example. A first steam channel 3122 is formed between the first outer peripheral wall 3120 and the inner peripheral wall 3121, wherein the first steam channel 3122 is a space for a heat dissipation fluid (not shown) to pass through. The inner peripheral wall 3121 surrounds a slot 313, wherein the slot 313 has a closed end 3130 and an open end 3131 opposite to each other.

As shown in FIG. 4, the outer shape of the radial cross section of the slot 313 may be, for example, a circle; the first outer peripheral wall 3120 includes, for example, two connected straight segments (unlabeled) and two arc segments (unlabeled), so that the first A radial cross-section of an outer peripheral wall 3120 is non-circular; specifically, a central axis C of the slot 313 and the first outer peripheral wall 3120 maintain a first distance D1 in a first direction A1; the slot 313 The central axis C and the first outer peripheral wall 3120 maintain a second distance D2 in a second direction A2; the central axis C of the slot 313 and the first outer peripheral wall 3120 maintain a third distance D3 in a third direction A3 ; The first direction A1 is, for example, perpendicular to the second direction A2, and the third direction A3 is, for example, opposite to the second direction A2. The first distance D1 is different from the second distance D2, that is, the thickness T of the radial section of the first outer peripheral wall 3120 is different from the length L of the radial section of the first outer peripheral wall 3120, where the thickness of the radial section T is the distance between the two straight-line segments of the first outer peripheral wall 3120, and the length L of the radial section is the maximum distance between the two arc-shaped segments of the first outer peripheral wall 3120; for example, the second distance D2 and the second The three distances D3 are the same, that is, the slot 313 is located at the geometric center of the first outer peripheral wall 3120.

However, the present invention is not limited to that the first direction A1 is perpendicular to the second direction A2; in other embodiments, the first direction may also form an acute angle with the second direction, that is to say, in other embodiments The center axis of the groove and the first outer wall surface may also maintain different distances in two directions with acute angles.

The second heat pipe 320 has a third end 321 and a fourth end 322 opposite to each other. The third end 321 is in thermal contact with the metal casing 201 (please refer to FIG. 1 additionally). The fourth end 322 is inserted into the slot 313 and is in thermal contact with the first heat pipe 310. For example, the radial cross-section of the fourth end 322 may be circular, and the fourth end 322 includes two second outer peripheral walls 3220 opposite to each other. A second steam channel 3221 at the fourth end 322 is formed between the two second outer peripheral walls 3220, wherein the second steam channel 3221 is a space for heat dissipation fluid (not shown) to pass through.

In addition, as shown in FIG. 5, in this embodiment, the maximum distance between a top 3123 and a bottom 3124 of the inner peripheral wall 3121 remains the same from the end near the closed end 3130 to the end near the open end 3131, and the fourth The maximum distance between the opposite second outer peripheral walls 3220 of the end 322 also remains the same.

In addition, the present invention is not limited to the first end 311 of the first heat pipe 310 thermally contacting the heat source 102, and the third end 321 of the second heat pipe 320 to connect to the metal housing 201; in other embodiments, it can also be The first end of the first heat pipe is connected to the metal casing, and the third end of the second heat pipe is in thermal contact with the heat source.

Furthermore, the present invention is not limited to the distance between the closed end 3130 and the open end 3131 of the slot 313.

In addition, the present invention is not limited to the first outer peripheral wall being tangent to the inner peripheral wall. Please refer to FIG. 6, which is the second end of the first heat pipe of the portable electronic device according to the second embodiment of the present invention. In this embodiment, the first outer peripheral wall 3120a and the inner peripheral wall 3121a of the second end 312a maintain a gap G.

Furthermore, the present invention is not limited to the geometric center of the slot located on the first outer peripheral wall. Please refer to FIGS. 7A and 7B. FIG. 7A is the first heat pipe of the portable electronic device according to the third embodiment of the present invention. A schematic cross-sectional view of the second end. 7B is a partial enlarged view of a side cross-sectional view of a first heat pipe of a portable electronic device according to a third embodiment of the present invention; in this embodiment, in the second end 312b, the central axis Cb of the slot 313b and The first outer peripheral wall 3120b maintains a first distance D1b in the first direction A1b; the center axis Cb of the slot 313b and the first outer peripheral wall 3120b maintains a second distance D2b in the second direction A2b; the center axis of the slot 313b Cb and the first outer peripheral wall 3120b maintain a third distance D3b in the third direction A3b; the first direction A1b is perpendicular to the second direction A2b, and the third direction A3b is opposite to the second direction A2b; the second distance D2b is different from From the third distance D3b, that is to say, in this embodiment, the slot 313b is not located at the geometric center of the first outer peripheral wall 3120b but is offset from the first outer peripheral wall 3120b.

Furthermore, the first outer peripheral wall of the present invention is not limited to two continuous straight segments and two arc segments to present a non-circular radial cross section. Please refer to FIG. 8, which is a fourth embodiment according to the present invention. A schematic cross-sectional view of the second end of the first heat pipe of the portable electronic device; in this embodiment, the radial cross-section of the first outer peripheral wall 3120c of the second end 312c may also be elliptical, so that the first A peripheral wall 3120c has a non-circular radial cross section.

Furthermore, please refer to FIG. 9, which is a partial enlarged view of a side cross-sectional schematic view of a first heat pipe of a portable electronic device according to a fifth embodiment of the present invention; compared to the first embodiment, the first The second end 312d of a heat pipe 310d additionally protrudes a tapered structure 314d, and the tapered structure 314d tapers from one end connected to the second end 312d to the other end.

Furthermore, please refer to FIG. 10, which is a partially enlarged view of a side cross-sectional schematic view of a first heat pipe of a portable electronic device according to a sixth embodiment of the present invention. Compared with the first embodiment, the second end 312e of the first heat pipe 310e in this embodiment additionally has a convex portion 315e, wherein the convex portion 315e includes a tapered section 3150e and a parallel section 3151e. The tapered section 3150e tapers from the end connected to the second end 312e to the other end away from the second end 312e, and the parallel section 3151e protrudes horizontally from the other end of the tapered section 3150e away from the second end 312e .

Furthermore, the present invention is not limited to the shape of the slot and the fourth end. Please refer to FIG. 11, which is a schematic side sectional view of a heat dissipation module of a portable electronic device according to a seventh embodiment of the present invention. Partially enlarged view. In this embodiment, in the second end portion 312f, a first vapor passage 3122f is formed between the inner peripheral wall 3121f and the first outer peripheral wall 3120f, and the maximum distance between the top 3123f and the bottom 3124f of the inner peripheral wall 3121f is from The end of the open end 3131f gradually decreases to the end close to the closed end 3130f; in the fourth end 322f, the maximum distance between the opposite second outer peripheral walls 3220f also gradually decreases from the end away from the closed end 3130f to the one close to the closed end 3130f One end; that is, the slot 313f surrounded by the inner peripheral wall 3121f tapers from the open end 3131f to the closed end 3130f, and the fourth end 322f tapers from the end away from the closed end 3130f to the other end, but the present invention does not It is not limited to this; in other embodiments, only the fourth end portion may have the tapered shape feature described above, or only the slot may have the tapered shape feature described above.

According to the heat dissipation module and the portable device disclosed in the above embodiments, since the central axis of the slot of the first heat pipe and the outer peripheral wall of the first heat pipe maintain different distances in different directions, that is, the first heat pipe has The flat outer peripheral wall, therefore, after the first heat pipe is thinned, the vapor passage between the outer peripheral wall and the inner peripheral wall of the first heat pipe still has a sufficiently large volume. In this way, the thermal conductivity and thinning of the heat dissipation module can be taken into account.

In addition, since the maximum distance between the opposite second outer wall surfaces of the fourth end portion gradually decreases from the end away from the closed end to the other end close to the closed end, and the maximum distance between the top and bottom of the first inner peripheral wall increases from close to The end of the end gradually decreases to the end close to the closed end, that is, the slot tapers from the outside to the inside, and the fourth end tapers toward the end face, so the vapor passage in the first heat pipe provided with the slot can have a larger volume. In this way, the vapor channel between the first outer wall surface and the inner wall surface of the first heat pipe can have a uniform temperature, thereby improving the heat conduction capacity of the heat dissipation module.

Although the present invention is disclosed as above with the foregoing embodiments, it is not intended to limit the present invention. Any person familiar with similar arts can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of patent protection for inventions shall be subject to the scope defined in the patent application scope attached to this specification.

10‧‧‧Portable electronic device 100‧‧‧Main body 101‧‧‧Dock 102‧‧‧heat source 103‧‧‧Cooling components 200‧‧‧Display body 201‧‧‧Metal shell 202‧‧‧Display module 250‧‧‧Pivot 251‧‧‧First fixed part 252‧‧‧Second fixed part 253‧‧‧Pivot Department 300‧‧‧cooling module 310, 310d, 310e‧‧‧First heat pipe 311‧‧‧First end 312, 312a, 312b, 312c, 312d, 312e, 312f 3120, 3120a, 3120b, 3120c, 3120f 3121, 3121a, 3121f ‧‧‧ inner wall 3122, 3122f‧‧‧ First steam channel 3123, 3123f‧‧‧Top 3124, 3124f‧‧‧Bottom 313, 313b, 313f‧‧‧slot 3130, 3130f‧‧‧closed end 3131, 3131f‧‧‧ Open 314d‧‧‧ tapered structure 315e‧‧‧Convex 3150e‧‧‧ tapered section 3151e‧‧‧Parallel 320‧‧‧Second heat pipe 321‧‧‧The third end 322, 322f ‧‧‧ fourth end 3220, 3220f ‧‧‧ second outer wall 3221‧‧‧Second steam channel C, Cb‧‧‧Central axis A1, A1b‧‧‧ First direction D1, D1b‧‧‧ First distance A2, A2b‧Second direction D2, D2b‧‧‧Second distance A3, A3b ‧‧‧ third direction D3, D3b ‧‧‧ third distance T‧‧‧thickness L‧‧‧Length G‧‧‧Gap

FIG. 1 is a perspective view of a portable electronic device according to a first embodiment of the invention. 2 is a perspective view of a heat dissipation module of a portable electronic device according to a first embodiment of the invention. FIG. 3 is an exploded schematic view of the heat dissipation module of FIG. 2. 4 is a schematic cross-sectional view of the second end of the first heat pipe of the portable electronic device according to the first embodiment of the present invention, drawn along the radial direction. FIG. 5 is a partially enlarged view of a schematic side sectional view of the heat dissipation module in FIG. 3 drawn along the axial direction. 6 is a schematic cross-sectional view of a second end of a first heat pipe of a portable electronic device according to a second embodiment of the invention. 7A is a schematic cross-sectional view of the second end of the first heat pipe of the portable electronic device according to the third embodiment of the present invention. 7B is a partially enlarged view of a schematic side sectional view of the first heat pipe of the portable electronic device according to the third embodiment of the present invention. 8 is a schematic cross-sectional view of a second end of a first heat pipe of a portable electronic device according to a fourth embodiment of the invention. 9 is a partial enlarged view of a schematic side sectional view of a first heat pipe of a portable electronic device according to a fifth embodiment of the invention. 10 is a partial enlarged view of a side cross-sectional view of a first heat pipe of a portable electronic device according to a sixth embodiment of the invention. 11 is a partial enlarged view of a side cross-sectional schematic view of a heat dissipation module of a portable electronic device according to a seventh embodiment of the present invention.

312‧‧‧second end

3120‧‧‧First outer wall

3121‧‧‧Inner peripheral wall

3122‧‧‧The first steam channel

313‧‧‧slot

C‧‧‧Central axis

A1‧‧‧First direction

D1‧‧‧ First distance

A2‧‧‧Second direction

D2‧‧‧Second distance

A3‧‧‧ Third direction

D3‧‧‧ Third distance

T‧‧‧thickness

L‧‧‧Length

Claims (24)

A heat dissipation module includes: a first heat pipe including a first end and a second end opposite to each other, the second end includes an outer peripheral wall and an inner peripheral wall, the inner peripheral wall is located inside the outer peripheral wall , A vapor channel is formed between the outer peripheral wall and the inner peripheral wall, and the inner peripheral wall surrounds a slot; wherein, a central axis of the slot and the outer peripheral wall maintain a first distance in a first direction, The central axis of the slot and the outer peripheral wall maintain a second distance in a second direction, the first direction is different from the second direction, and the first distance is different from the second distance; wherein the The outer shape of the radial section of the outer peripheral wall is non-circular. The heat dissipation module as described in item 1 of the patent scope further includes a second heat pipe, one end of the second heat pipe is inserted into the slot and is in thermal contact with the first heat pipe, and the second heat pipe may be Relative to the first heat pipe. The heat dissipation module as described in item 1 of the patent application, wherein the radial cross-sectional shape of the slot is circular. The heat dissipation module as described in item 1 of the patent application scope, wherein the outer peripheral wall is tangent to the inner peripheral wall. The heat dissipation module as described in item 1 of the patent application scope, wherein a gap is maintained between the outer peripheral wall and the inner peripheral wall. The heat dissipation module as described in item 1 of the patent application, wherein the first direction is perpendicular to the second direction. The heat dissipation module as described in item 6 of the patent scope, wherein the The central axis and the outer peripheral wall maintain a third distance in a third direction, the third direction is opposite to the second direction, and the third distance is different from the second distance. The heat dissipation module as described in item 1 of the patent application scope, wherein the second end protrudes a tapered structure, and the tapered structure is tapered from one end connected to the second end to the other end. The heat dissipation module as described in item 1 of the patent application, wherein the second end protrudes from a convex portion, the convex portion includes a tapered section and a parallel section, and the tapered section is separated from the second end One end of the connection tapers to the other end away from the second end, and the parallel section protrudes from the other end of the tapered section. The heat dissipation module as described in item 1 of the patent application range, wherein the slot has a closed end and an open end opposite, and the slot is tapered from the open end to the closed end. The heat dissipation module as described in item 2 of the patent application range, wherein the slot has a closed end and an open end opposite, and the end of the second heat pipe tapers from the end away from the closed end to the other end, or It is the slot that tapers from the open end to the closed end. The heat dissipation module as described in item 11 of the patent application scope, wherein the end of the second heat pipe tapers from the end away from the closed end to the other end, and the slot tapers from the open end to the closed end. A portable electronic device includes: a main body, including a base and a heat source, and the heat source is disposed on the base; a display body includes a metal casing and a display module, the metal casing Pivotally connected to the base, so that the metal casing can rotate relative to the base, and the display module is disposed on the metal casing; and A heat dissipation module includes a first heat pipe and a second heat pipe. The first heat pipe includes a first end and a second end opposite to each other. The second end includes an outer peripheral wall and an inner peripheral wall. The inner peripheral wall is located inside the outer peripheral wall. A steam passage is formed between the outer peripheral wall and the inner peripheral wall, and the inner peripheral wall surrounds a slot. One end of the second heat pipe is inserted into the slot and heats up. In contact with the first heat pipe, and the second heat pipe can rotate relative to the first heat pipe, one of the first end and the other end of the second heat pipe thermally contacts the heat source, and the first end The metal case is connected to the other one of the other ends of the second heat pipe; wherein, a central axis of the slot and the outer peripheral wall maintain a first distance in a first direction, and the The central axis and the outer peripheral wall maintain a second distance in a second direction, the first direction is different from the second direction, and the first distance is different from the second distance. The portable electronic device as described in item 13 of the patent application range, wherein the first end is in thermal contact with the heat source, and the other end of the second heat pipe is connected to the metal casing. The portable electronic device as described in item 13 of the patent application scope, wherein the radial cross-sectional shape of the slot is circular. The portable electronic device as described in item 13 of the patent application scope, wherein the outer diameter of the outer peripheral wall has a non-circular shape. The portable electronic device as described in item 13 of the patent application scope, wherein the outer peripheral wall is tangent to the inner peripheral wall. The portable electronic device as described in item 13 of the patent application scope, wherein a gap is maintained between the outer peripheral wall and the inner peripheral wall. The portable electronic device as described in item 13 of the patent application scope, wherein the first direction is perpendicular to the second direction. The portable electronic device as described in item 19 of the patent application range, wherein the central axis of the slot and the outer peripheral wall maintain a third distance in a third direction, the third direction is opposite to the second direction, And the third distance is different from the second distance. The portable electronic device as described in item 13 of the patent application scope, wherein the second end protrudes a tapered structure, and the tapered structure is tapered from one end connected to the second end to the other end. The portable electronic device as described in item 13 of the patent application scope, wherein the second end protrudes from a convex portion, the convex portion includes a tapered section and a parallel section, the tapered section is separated from the second One end connected to the end is tapered to the other end away from the second end, and the parallel section protrudes from the other end of the tapered section. The portable electronic device as described in item 13 of the patent application scope, wherein the slot has a closed end and an open end opposite, and the end of the second heat pipe tapers from the end away from the closed end to the other end Or, the slot tapers from the open end to the closed end. The portable electronic device as described in item 23 of the patent application scope, wherein the end of the second heat pipe tapers from the end remote from the closed end to the other end, and the slot tapers from the open end to the closed end.

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