JPH11340671A - Data processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve heat radiation of a data processing device. SOLUTION: A thermo-siphon 6 is combined with a heat sink 5 as a heat sink structure at the side of a lid part 51 of a data processing device, the heat from a CPU1 is applied to operation liquid 9 inside a circulation pipe 33, the operation liquid 9 is heated and vaporized, and is subjected to heat transport to the thermo-siphon 6 as vapor heat and a radiation structure of high performance for which the entire surface of the lid part 51 is used as an effective heat radiation area can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus, and more particularly to a portable information processing apparatus capable of easily releasing heat generated by a heating element to the outside.

[0002]

2. Description of the Related Art Conventionally, techniques in such a field include:
Japanese Patent Application Laid-Open No. 9-6481 is known. The conventional portable information processing apparatus described in this publication is disclosed in FIG.
As shown in FIG. 5, the heat pipe 3 and the heat radiating plate 5 are incorporated in the lid 51, and the heat of the heating element 1 incorporated in the main body 50 is radiated from the heat radiating plate 5 through the heat conducting block 2 and the heat pipe 3. Is done. Also, as other conventional technologies,
JP-A-8-87354, JP-A-8-204373
And JP-A-8-261672.

[0003]

In the conventional portable information processing apparatus, heat transmitted from the heat pipe 3 is conducted to the entire surface of the heat sink 5 because heat conduction in the surface direction of the heat sink 5 is not sufficient. It was difficult. As a result, of the portions of the heat radiating plate 5, only the portion close to the heat pipe 3 could contribute to heat radiation, and the heat radiation effect was not sufficient.

The present invention has been made to solve such a problem, and has as its object to improve the heat radiation effect of an information processing apparatus.

[0005]

An information processing apparatus according to the present invention comprises a main body in which a heating element is incorporated, a lid covering the main body, and an operation unit provided in the lid and housed therein. A thermosiphon for circulating the liquid and radiating heat.

[0006] The information processing apparatus further includes a heat sink attached to the thermosiphon.

[0007] The lid may have a housing that covers the lid, and the heat sink may be at least a part of the housing of the lid.

[0008] The information processing apparatus may further include a circulation pipe for introducing the working fluid contained in the thermosiphon and heating the working fluid with heat generated by the heating element.

[0009] The circulation pipe is characterized in that one end is joined to the thermosiphon and the other end is joined to a heating element.

[0010] The circulation pipe includes a steam flow path for sending the working fluid vaporized by heat generated by the heating element to the thermosiphon, and a fluid for returning the working fluid liquefied by the thermosiphon from the thermosiphon. It is characterized in that it has a partition wall for partitioning with the circulation flow path.

The circulation pipe includes an inner pipe for sending the working fluid vaporized by heat generated by the heating element to the thermosiphon, and an outer pipe for returning the working fluid liquefied by the thermosiphon from the thermosiphon. And characterized in that:

The circulation pipe is characterized in that a plurality of grooves are provided on an inner wall.

[0013] The circulation pipe is characterized in that a wick is provided on an inner wall.

The main body and the lid have an engagement shaft, and the circulation pipe is wound in a coil shape along the engagement axis between the main body and the lid. .

[0015] The circulation pipe has one end and the other end joined to the thermosiphon, the middle thereof joined to a heating element, and introduces the working fluid of the thermosiphon from one end and circulates it to the other end. .

The main body and the lid have an engagement shaft, and the circulation pipe is wound in a coil shape along the engagement axis between the main body and the lid. .

The thermosiphon is connected to the other end of the circulation pipe, and extends in a direction away from an axis of engagement between the main body and the lid, and branches off from the vapor passage. And a plurality of liquid ring channels extending in a direction approaching the engagement shaft and integrally joined at one end to one end of the circulation pipe.

[0018] The thermosiphon is a pipe provided from the main body to the lid.

The pipe is looped.

[0020] The pipe is characterized in that it has a pattern capable of returning the hydraulic fluid from the lid to the main body.

The pattern is characterized in that all parts are downwardly inclined when the lid is opened.

The thermosiphon has a liquid reservoir for storing a hydraulic fluid and a flow path for circulating the hydraulic liquid, wherein the liquid reservoir is disposed on a heating element, and the flow path is disposed on a lid. It is characterized by.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a portable information processing apparatus according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view showing an embodiment of the present invention. 50 is a main body of the notebook type personal computer, 51 is a lid covering the main body, and 52 is a main body 50
And the lid 51 are engaged with each other and have a hinge structure. Reference numeral 1 denotes a CPU (Central) which is a heating element.
Processing Unit), 2 is hinge part 1
3 is a heat conduction block. The heat conduction block 2 is not limited to metal as long as it is a heat conduction material, and may be carbon or the like. The axis of the hinge portion 13 of the heat conduction block 2 is on the same axis as the engagement shaft 52. 33 is a circulation pipe attached to the thermosiphon 6, 5 is a heat sink, and 6 is a thermosiphon formed on the heat sink. Heat pipes are known, similar to thermosiphons. A heat pipe is made by filling an appropriate amount of liquid (hereinafter referred to as working fluid) that evaporates at a predetermined temperature in an exhausted metal pipe, deprives it of heat of vaporization at a high temperature end, and releases heat of condensation at a low temperature end. The heat transfer is performed efficiently, and the working fluid is circulated by utilizing a vertical groove provided on the inner wall of the tube or a capillary phenomenon of a porous structure (wick). The thermosiphon 6 also performs highly efficient heat transfer on the same principle as the heat pipe 3. However, usually, the thermosiphon 6 does not have a vertical groove or a porous structure (wick) provided on the inner wall of the tube, and does not circulate the working fluid by utilizing the capillary phenomenon. Therefore, the thermosiphon 6 circulates the working fluid along the flow path using gravity. For example, a roll bond plate 58 manufactured by Showa Aluminum Co., Ltd. can be used as the thermosiphon 6. The roll bond plate is a member having a hollow channel 59 inside an aluminum plate as shown in FIG. The use of a roll bond plate is effective because the heat radiating plate 5 and the thermosiphon 6 are integrally formed. However, FIG.
As shown in (1), the heat sink 5 and the thermosiphon 6 may be independent. When the surface area of the thermosiphon 6 is large, the heat sink 5 may be unnecessary. Reference numeral 7 denotes a liquid crystal display panel. The thermosiphon 6 has a liquid reservoir 55 for storing the hydraulic fluid 9. In addition, the thermosiphon 6 has steam flow paths 53 and 54 for circulating the working fluid 19 in the surface direction of the heat sink.
have. FIG. 4 is a configuration diagram of the circulation pipe 33. 37 is a tip of the circulation pipe 33. In the figure,
L is a portion inserted into the hinge portion 13 of the thermosiphon 6 and is a portion where the working fluid evaporates.

The heat generated by the CPU 1 is transmitted to the circulation pipe 33 through the hinge 13 of the heat conduction block 2 and is transmitted to the working fluid 9.
Heat. The heated working fluid turns into steam
Transported in the direction of And it moves in a thermosiphon. The vapor is condensed during the movement, liquefies, and returns to the circulation pipe in the direction of arrow B again by gravity. By repeating this cycle, the heat of the CPU is efficiently diffused and radiated to the entire radiator plate 5.

FIG. 5 shows a circulation pipe 3 having a partition wall 77.
3 is a structural view of FIG. In the structure of FIG. 4, there is a case where the vapor flow and the return liquid interfere with each other in the circulation pipe 33 (hereinafter, this is referred to as a flooding limit), and the reflux does not work well. In this structure, since the flow path in the circulation pipe is divided into two or more, the vapor flow path 81 and the liquid circulation path 82 are separate, so there is no flooding limit in which the return liquid is blown off by the vapor, and the operation reliability is high. Large heat transport limit. Further, by making the height of the steam flow path 81 higher than the height of the liquid circulation flow path 82, it is possible to make it difficult for the working fluid to enter the steam flow path 81.

FIG. 6 is a structural view of the artery type circulation pipe 33. In FIG. 3, in FIG. 6, reference numeral 78 denotes an inner pipe of a double pipe provided in the circulation pipe 33, and 79 denotes an outer pipe. In this structure, since the inside of the circulation pipe is divided into two or more conduits, the vapor flow path 81 and the liquid circulation flow path 82 are separate, so there is no flooding limit in which the return liquid is blown off by the vapor, and the operation reliability is improved. High heat transfer limit.
Also, as in FIG.
By making the height higher than the height of 2, the working fluid can hardly enter the steam flow passage 81.

FIG. 7 is a structural view of the groove type circulation pipe 33. As shown in FIG. In FIG. 7, reference numeral 80 denotes a groove provided in the circulation pipe 33. In this structure, since the groove 80 is cut in the tube wall, the return liquid flows into the groove by surface tension and flows.
The steam flow path and the liquid circulation flow path are separate, and there is no flooding limit in which the return liquid is blown off by the steam, and the operation reliability is high and the heat transport limit is large.

As shown in FIG. 8, a wick 56 may be provided on the pipe wall. The return liquid flows through the wick 56 by capillary action, so that the vapor flow path and the liquid circulation flow path are separated.

In the heat transport loop shown in FIG. 9, the steam pipe 34 for sending the working fluid 9 evaporated and vaporized by the heat generated by the CPU 1 to the thermosiphon 6;
And a liquid return pipe 35 for returning the working fluid condensed and liquefied in the above. For this reason, the vapor flow path 81 and the liquid circulation flow path 82 are separated, and there is no flooding limit in which the return liquid is blown off to the vapor, and the operation reliability is high and the heat transport limit is large. The steam pipe 34 and the liquid return pipe 35 can be constituted by one circulation pipe. Hinge part 1 in the middle of the circulation pipe
3 may be penetrated. The steam is initially generated from both the steam pipe 34 and the liquid return pipe 35 and is generated in the directions of arrows A and C. However, since there are five flow paths in the liquid return pipe 35, the amount of the returned liquid gradually increases. The number of the two flow paths increases, and as a result, the hydraulic fluid 9 accumulates in the liquid reservoir 55, and the hydraulic fluid 9 circulates in the directions of arrows A and B.

Also, the pattern of the thermosiphon is oblique so that the joint 36 with the liquid return pipe 35 comes to the bottom of the pattern in consideration of the liquid return due to gravity, so it depends on the use angle of the liquid crystal display panel. Without this, the liquid return surely occurs.
In addition, a tapered portion 61 is provided at the junction 36 between the liquid return pipe and the thermosiphon so that the working fluid enters the liquid return pipe. Further, if the joining portion 36 is formed in a bell mouth shape, liquid collection and circulation are further facilitated, and the operation is stabilized.

Another example will be described with reference to FIG. FIG. 10 shows a heat transport loop showing another embodiment of the heat dissipation structure. The steam pipe 34 and the liquid return pipe 35 forming a circulation pipe are wound in a coil shape along an engagement shaft 52 between the main body and the lid. The center axis of the coil 36 and the engagement axis 52 are the same axis. Therefore, the change in the length of the pipe accompanying the opening and closing of the liquid crystal display panel can be absorbed by the coil 36. According to this configuration, the degree of freedom of arrangement of the CPU 1 is increased. Further, the hinge portion 13 does not need to be on the same axis as the engagement shaft 52, so that the degree of freedom of arrangement of the hinge portion 13 is increased.
In FIG. 10, the hinge 13 is placed right above the CPU 1 to improve the thermal conductivity.

As shown in FIG. 11, a coil 36 may be provided in the configuration of FIG.

A thermosiphon 6 having a loop pattern as shown in FIGS. 12 and 13 may be used. FIG.
4, a thermosiphon 6 that is not looped may be used as shown in FIG. 12 to 15, the hydraulic fluid can be circulated using gravity. That is, there is no liquid reservoir 55 in the lid, and the pattern is inclined so that the hydraulic fluid always accumulates in the main body. The thermosiphon 6 in FIGS. 12 to 15 is entirely made of a pipe 49. The pipe 49 of FIGS. 12 and 13 is used to open and close the lid.
May have flexibility as a whole, or may have flexibility only near the engagement shaft 52. 14 and 15, since the hinge portion 13 is provided, the pipe 49 of the thermosiphon 6 does not have to have flexibility. FIG.
6 shows a case where the liquid reservoir 55 is provided immediately above the CPU 1. In the case of FIG. 16, a seal member 69 is provided between the hinge portion 13 and the thermosiphon 6. Seal member 6
Numeral 9 seals the leakage of hydraulic fluid from between the hinge portion 13 and the thermosiphon 6, and rotatably attaches the thermosiphon 6 to the hinge portion 13. Although not shown, the liquid reservoir 55 and the heat conduction block 2
May be integrated. Thus, the heat radiation efficiency is further improved. Further, since the thermosiphon 6 does not have a wick, when the thermosiphon 6 is formed by the pipe 49, there is an advantage that the diameter of the pipe 49 can be reduced and the cost can be reduced as compared with a heat pipe having a wick. In addition, when the thermosiphon 6 is formed by the pipe 49, the flow path length can be made longer and the heat radiation ability can be increased as compared with the case where the thermosiphon 6 is formed by a roll bond plate.

[0034]

According to the present invention, one end of a circulating pipe is joined to the thermosiphon, and the working fluid introduced from the thermosiphon circulates inside the circulating pipe. From one end to the thermosiphon. In addition, since the thermosiphon circulates the working fluid contained therein in the surface direction of the radiator plate, the temperature distribution of each part of the radiator plate is made uniform. As a result, the heat generated by the heating element is distributed over the entire surface of the heat sink,
The entire surface area of the heatsink is effectively used and efficiently released to the outside.

Since the circulation pipe is divided into a vapor flow path and a liquid circulation flow path by a partition plate, the working fluid vaporized at the tip of the circulation pipe passes through the vapor flow path toward the thermosiphon, and is turned into a thermosiphon. The working liquid liquefied in the step returns to the tip of the circulation pipe through the liquid circulation path. In this way, the vaporized working fluid and the liquefied working fluid operate without collision and scattering on the way, and flow smoothly in the circulation pipe, so that the heat generated by the heating element is efficiently released to the outside. You.

Since the circulation pipe has a double pipe structure of an inner pipe and an outer pipe, the working fluid vaporized at the end of the circulation pipe passes through the inner pipe to the thermosiphon and is liquefied by the thermosiphon. The hydraulic fluid returns to the end of the circulation pipe through the outer pipe. As described above, the vaporized working fluid and the liquefied working fluid smoothly flow in the circulation pipe without collision on the way, and the heat generated by the heating element is efficiently released to the outside.

Since a plurality of grooves are provided on the inner wall of the circulation pipe, the working fluid vaporized at the tip of the circulation pipe passes through the vicinity of the center of the circulation pipe toward the thermosiphon, while the thermosiphon uses the same. The liquefied working fluid returns to the hinge portion in the heat transfer block along the groove. in this way,
In this structure, the vaporized working fluid and the liquefied working fluid flow smoothly through the circulation pipe without colliding on the way, and the heat generated by the heating element is efficiently released to the outside. .

Both ends of the circulation pipe are joined to the thermosiphon to form a loop, and the working fluid circulates in this loop, so that the heat generated by the heating element is efficiently transmitted to the thermosiphon and the radiator plate. Is done. In addition, since the thermosiphon circulates the working fluid contained therein in the surface direction of the radiator plate, the temperature distribution of each part of the radiator plate is made uniform. As a result, the heat generated by the heating element is dispersed over the entire surface of the radiator plate, and is efficiently released to the outside from the entire surface of the radiator plate.

Since the circulation pipe is wound in a coil shape along the axis of engagement between the main body and the lid, even if the lid is opened and closed,
Only the diameter of the coiled portion changes, but the circulation pipe does not bend. As a result, the durability of the circulation pipe is improved.

Since the thermosiphon has a steam flow path and a liquid ring flow path, the working fluid vaporized at the center of the circulation pipe passes through the steam flow path and moves in a direction away from the engagement shaft. Then, the working fluid that has passed through the steam flow path passes through the plurality of liquid ring flow paths and proceeds in a direction approaching the engagement shaft. Here, in a normal use state, since the lid is erected with the engagement shaft down, the end farthest from the engagement shaft is up. Accordingly, the vaporized hydraulic fluid travels upward as vapor, condenses and releases heat at the surface of the heat radiating plate having a low temperature, is liquefied, and descends downward due to gravity. Further, since the vapor / liquid flow path is branched into a plurality of parts, it is finely dispersed in the radiator plate and condensed and waste heat is generated. As a result, the working fluid reliably reaches the center of the circulation pipe. As described above, the plurality of liquid ring channels branch and advance, so that the heat of the working fluid is dispersed over the entire surface of the radiator plate and is efficiently released to the outside from the entire surface of the radiator plate.

In this structure, a thermosiphon is combined with a heat radiating plate at the lid of the information processing device, so that gravity can be used for reflux driving by two-phase flow, so that there is no need to create a wick structure such as a heat pipe. In addition, the heat radiation mechanism can be manufactured at low cost. In addition, since a roll bond panel or the like can be used as the thermosiphon, a flow path pattern can be freely arranged, and soaking is effective. Therefore, a high-performance heat radiation structure using the entire surface of the lid as an effective heat radiation area can be realized.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention.

FIG. 2 is a partially broken perspective view of a heat sink and a thermosiphon showing one embodiment of the present invention.

FIG. 3 is a partially cutaway perspective view of a heat sink and a thermosiphon showing one embodiment of the present invention.

FIG. 4 is a diagram showing a circulation pipe showing one embodiment of the present invention.

FIG. 5 is a diagram showing a circulation pipe showing one embodiment of the present invention.

FIG. 6 is a diagram showing a circulation pipe showing one embodiment of the present invention.

FIG. 7 is a diagram showing a circulation pipe showing one embodiment of the present invention.

FIG. 8 is a view showing a circulation pipe showing one embodiment of the present invention.

FIG. 9 is a perspective view showing one embodiment of the present invention.

FIG. 10 is a perspective view showing one embodiment of the present invention.

FIG. 11 is a perspective view showing an embodiment of the present invention.

FIG. 12 is a perspective view showing one embodiment of the present invention.

FIG. 13 is a perspective view showing one embodiment of the present invention.

FIG. 14 is a perspective view showing one embodiment of the present invention.

FIG. 15 is a perspective view showing one embodiment of the present invention.

FIG. 16 is a diagram showing a conventional heat dissipation structure.

FIG. 17 is a view showing a conventional heat dissipation structure.

[Description of Signs] 1 CPU, 2 heat conduction block, 5 heat sink, 6 thermosiphon, 7 liquid crystal display panel, 13 hinge part,
33 Circulation pipe, 34 Steam pipe, 35 Liquid return pipe, 3
6 coil, 49 circulation pipe, 50 main body, 51
Lid, 52 engagement shaft, 55 liquid reservoir, 56 wick,
77 partition wall, 78 inner tube, 79 outer tube, 80
Groove, 81 vapor flow path, 82 liquid circulation flow path.

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] April 27, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

Claims (18)

[Claims] 1. A main body in which a heating element is incorporated, a lid covering the main body, and a thermosiphon provided in the lid and circulating and radiating hydraulic fluid contained therein. An information processing apparatus characterized by the above-mentioned. 2. The information processing apparatus according to claim 1, wherein the information processing apparatus further includes a heat sink attached to the thermosiphon. 3. The information processing apparatus according to claim 2, wherein the lid has a housing that covers the lid, and the heat sink is at least a part of the housing of the lid. apparatus. 4. The information processing apparatus according to claim 1, further comprising a circulation pipe that introduces the working fluid contained in the thermosiphon and heats the working fluid with heat generated by the heating element. The information processing apparatus according to claim 1. 5. The information processing apparatus according to claim 4, wherein the circulation pipe has one end joined to the thermosiphon and the other end joined to a heating element. 6. The circulation pipe includes a steam flow path that sends the working fluid vaporized by heat generated by the heating element to the thermosiphon, and the working fluid liquefied by the thermosiphon from the thermosiphon. 6. The information processing apparatus according to claim 5, further comprising a partition wall for partitioning the liquid circulation path back. 7. The circulation pipe includes an inner pipe that sends the working fluid vaporized by heat generated by the heating element to the thermosiphon, and returns the working fluid liquefied by the thermosiphon from the thermosiphon. The information processing apparatus according to claim 5, further comprising an outer tube. 8. The information processing apparatus according to claim 5, wherein the circulation pipe has a plurality of grooves provided on an inner wall thereof. 9. The information processing apparatus according to claim 5, wherein a wick is provided on an inner wall of the circulation pipe. 10. The main body and the lid have an engagement shaft, and the circulation pipe is wound in a coil shape along the engagement axis between the main body and the lid. The information processing apparatus according to claim 4, wherein 11. The circulation pipe has one end and the other end joined to the thermosiphon, and a midway joined to a heating element,
The information processing apparatus according to claim 4, wherein the working fluid of the thermosiphon is introduced from one end and circulated to the other end. 12. The main body and the lid have an engagement shaft, and the circulation pipe is wound in a coil shape along the engagement axis between the main body and the lid. The information processing apparatus according to claim 11, wherein 13. The steam siphon is joined to the other end of the circulation pipe, and extends in a direction away from an axis of engagement between the main body and the lid. The information processing apparatus according to claim 11, further comprising a plurality of liquid ring channels extending in a direction approaching the engagement shaft and integrally joined at one end to one end of the circulation pipe. apparatus. 14. The information processing apparatus according to claim 1, wherein the thermosiphon is a pipe provided from the main body to the lid. 15. The information processing apparatus according to claim 14, wherein said pipe is looped. 16. The information processing apparatus according to claim 14, wherein the pipe has a pattern capable of returning the hydraulic fluid from the lid to the main body. 17. The pattern, when the lid is opened,
17. The information processing apparatus according to claim 16, wherein all parts are inclined downward. 18. The thermosiphon has a liquid reservoir for storing a hydraulic fluid and a flow path for circulating the hydraulic liquid, the liquid reservoir is disposed on a heating element, and the flow path is disposed on a lid. The information processing apparatus according to claim 1, wherein: