JP4948461B2 - heatsink - Google Patents

Description

  The present invention relates to a heat sink for thermally dissipating heat from a heat-generating component that is thermally connected to a heat-generating component or the like, and in particular, a thin plate material provided with heat-dissipating fins of different directions that smoothen the flow of air in a centrifugal fan It is related with the heat sink formed by laminating | stacking.

  In recent years, electronic devices have built-in high-power, highly-integrated components such as CPUs. Various electronic components such as semiconductor elements have a very high degree of integration and perform processing such as calculation and control of information at high speed, and thus generate a large amount of heat. In addition, the number of devices that generate heat is increasing in other devices, and heat dissipation treatment is an important issue in these devices.

  Various heat sinks are used to process the heat generated by these devices. For example, there is a heat sink in which a base plate portion and a heat radiating fin portion are integrally formed by extrusion molding, or a heat sink in which a separately manufactured metal base plate and a metal heat radiating fin are combined.

  In other words, a heat sink combining a separately manufactured metal base plate and metal heat dissipating fin is soldered with a plurality of thin heat dissipating fins on the other surface of the base plate to which the heat generating element is thermally connected to one surface. It is a heat sink formed by bonding with the like. In addition, there is a heat sink that inserts a thin plate fin into a groove portion of a base plate having a plurality of groove portions, mechanically caulks the peripheral portion of the groove portion, and joins the heat radiating fins to the base plate.

  A method of cooling a heat generating element is widely known by combining a heat sink as described above and a fan for forced cooling, and blowing cool air between radiating fins to which heat of the heat generating element is transmitted. Further, when the heat generating element and the heat radiating fin are separated from each other, the heat generating element and the heat radiating fin are thermally connected by the heat pipe, and the heat of the heat generating element is disposed at another position by the heat pipe. It is also known to move to the radiating fin and cool by a cooling fan.

Furthermore, a heat sink with a centrifugal fan is known in which a centrifugal fan is attached to a housing having an air intake port and an air discharge port to cool a heat generating element in order to increase heat dissipation efficiency. The heat sink with a centrifugal fan blows the air taken in from the air intake port to the surroundings by rotating the centrifugal fan, and is guided directly to the wall surface of the housing or through the radiating fins arranged near the air exhaust port. Is discharged out of the housing. A heat pipe is thermally connected to the radiating fin to move the heat of the heating element, and the heat of the heating element moved to the radiating fin is dissipated by the air blown by the above-described fan.
JP 2005-38985 A JP 2005-321287 A

  In the heat sink with a centrifugal fan, as described above, the air taken in from the air intake port is blown around by rotating the centrifugal fan, and is directly or directly guided to the wall surface of the housing and arranged near the air discharge port. Air is discharged out of the housing through the radiating fins. The heat dissipating fins in the vicinity of the air discharge port are arranged in parallel with the rotation axis of the fan. However, since the wind of the centrifugal fan does not necessarily flow in parallel with the fins over the entire surface of the radiating fin, the wind cannot pass smoothly through a part of the radiating fin, and sufficient cooling has not been performed.

  In order to solve the above-mentioned problem that the centrifugal fan wind does not smoothly pass through the heat radiating fins, the heat radiating fins are installed obliquely with respect to the air discharge port, but the available space should be used effectively. In addition, it was complicated to assemble. On the other hand, in order not to disturb the flow of wind, a laminated type in which radiating fins are arranged in a direction perpendicular to the rotation axis of the fan has been devised, but it is necessary to obtain heat conduction in the vertical direction of the laminated radiating fins. Therefore, the entire surface of the radiating fin could not be used effectively, and the efficiency was poor.

  Accordingly, an object of the present invention is to provide a heat sink excellent in cooling efficiency, in which the wind of a centrifugal fan can smoothly pass through the radiating fins.

  The inventor conducted extensive research to solve the conventional problems. As a result, the following matters were found. That is, an approximately L-shaped cut-and-raised portion is formed by cutting and raising the laminated thin plate material, and a flat part at the tip of the cut-and-raised portion is joined to another laminated thin plate material to form a heat sink and cut and raised. The wind of the centrifugal fan is guided in a desired direction by the vertical part of the part.

At this time, the end portions of the laminated thin plate materials are used as the first heat radiation fins, and second heat radiation fins in which the thin plate materials are arranged in parallel in the direction orthogonal to the first heat radiation fins are provided. The second heat dissipating fin is placed in a portion where the wind of the centrifugal fan flows parallel to one side of the outlet, and the first heat dissipating fin is placed in a portion where the other air flow is bent. The wind of the centrifugal fan induced by the raising portion can smoothly pass between the two heat radiating fins, and a heat sink excellent in cooling efficiency can be obtained.

  Further, when the cut and raised portion of another laminated thin plate material is passed through the opening formed by cutting and raising and joined to a desired thin plate material, the cut and raised portion also exerts a heat dissipation function, and between the laminated thin plate materials. Thus, it was found that effective cooling is possible because the wind of the centrifugal fan moves relative to each other. The present invention has been made based on the above-described matters.

A first aspect of the heat sink according to the present invention includes a hollow portion that accommodates the centrifugal fan, and is stacked with a predetermined gap in the direction of the rotation axis of the centrifugal fan, and is a straight line having two sides orthogonal to the wind of the centrifugal fan. A plurality of thin plate-like bodies provided with a blow-out port that blows out from the end portion of the shape,
A plurality of heat dissipating fins arranged in parallel with the direction of the rotation axis of the centrifugal fan, and the wind of the centrifugal fan is arranged on an extension of a tangent line on the outer periphery of the centrifugal fan flowing in parallel with one side of the outlet. A second radiating fin portion,
A first radiating fin portion having a plurality of radiating fins formed by the end portions of the laminated thin plate-like body provided at a position other than the second radiating fin portion of the outlet;
One end is thermally connected to the portion of the thin plate-like body that is thermally connected to the heat-generating component, and the other end is heated to the first and second radiating fin portions. At least one heat pipe connected in a mechanical manner ;
It is a heat sink provided with.

  According to a second aspect of the heat sink of the present invention, the first heat radiating fin portion is disposed in a direction perpendicular to the axial direction of the centrifugal fan, and the second heat radiating fin portion is aligned with the axial direction of the centrifugal fan. A heat sink in which fins are arranged in parallel in parallel directions.

According to a third aspect of the heat sink of the present invention, the thin plate-like body includes an air guiding portion that guides air flowing through a space formed by being stacked, and the second heat radiating fin portion is a centrifugal fan. Arranged in a portion where the wind flows parallel to one side of the outlet, the first heat dissipating fin portion is disposed in the other portion, and the wind induced by the air guiding portion is It is a heat sink which passes a radiation fin part and the said 2nd radiation fin part.

  According to a fourth aspect of the heat sink of the present invention, the thin plate-like body is formed by cutting and raising a predetermined portion and forming a generally L-shaped cut-and-raised portion composed of a vertical portion and a horizontal portion. The heat sink includes an opening formed, the horizontal portion is thermally connected to another thin plate-like body, and the air guiding portion is formed of the cut and raised portion.

  According to a fifth aspect of the heat sink of the present invention, the L-shaped cut and raised portion of the thin plate member passes through the opening formed in another thin plate member, and the horizontal portion has a predetermined thin plate shape. A heat sink that is thermally connected to the body.

  A sixth aspect of the heat sink according to the present invention is a heat sink in which the second heat dissipating fin portion is formed by arranging generally U-shaped fins including an upper surface portion, a vertical surface portion, and a bottom surface portion in parallel.

  A seventh aspect of the heat sink of the present invention is a heat sink in which at least a part of the heat pipe is disposed with a space portion between the heat pipe.

  An eighth aspect of the heat sink of the present invention is a heat sink in which heat pipes are arranged so that cooling air flows through the upper and lower surfaces of the heat pipe portions arranged so as to form the space portions. .

  According to a ninth aspect of the heat sink of the present invention, the heat pipe is composed of two flat heat pipes, and the heat pipe extends in different directions from the portion of the thin plate body in which the heat generating components are thermally connected. The heat sink is disposed so as to surround the thin plate-like body.

According to this invention, the end of the laminated thin plate material is used as the first heat radiating fin, the second heat radiating fin in which the thin plate materials are arranged in parallel in the direction orthogonal to the first heat radiating fin is provided, and the second The heat dissipating fin is placed in the part where the wind of the centrifugal fan flows parallel to one side of the air outlet, and the first heat dissipating fin is placed in the part where the other air flow is bent. The wind of the centrifugal fan induced by the section can smoothly pass between the two heat dissipating fins, and a heat sink excellent in cooling efficiency can be obtained.

  Furthermore, according to the present invention, the cut-and-raised portion of another laminated sheet material is passed through the opening formed by the cut-and-raised part and joined to the desired thin-plate material, so the cut-and-raised part also exhibits a heat dissipation function, The centrifugal fan wind moves between the laminated thin plates, and effective cooling can be achieved.

Embodiments of the heat sink of the present invention will be described in detail with reference to the drawings.
One aspect of the heat sink of the present invention includes a plurality of thin plate-like bodies that are provided with a hollow portion that houses a centrifugal fan and are stacked with a predetermined gap,
A first radiating fin portion formed by the end of the laminated thin plate-like body, a second radiating fin portion arranged in a direction orthogonal to the first radiating fin portion,
One end is thermally connected to the portion of the thin plate-like body that is thermally connected to the heat generating component, and the other end is thermally connected to the first radiating fin portion and the second radiating fin portion. A heat sink comprising at least one heat pipe connected thereto.

FIG. 1 is a perspective view for explaining one embodiment of the heat sink of the present invention.
The thin plate-like body is made of, for example, a metal thin plate material having high workability such as copper, aluminum, aluminum alloy having excellent thermal conductivity. A flat heat pipe can be used as the heat pipe.

  As shown in FIG. 1, the heat sink 1 is formed by stacking processed thin plate materials 2 and arranging two heat pipes 4-1 and 4-2. The heat pipe is disposed so that at least a part thereof protrudes to the outside, and includes a space portion 7 between the thin plate material 2. The heat pipes 4-1 and 4-2 are thermally connected to a portion of the thin plate material in which one end portions 5-1 and 5-2 are thermally connected to the heat generating component, and the other end portion 6-1. 6-2 is thermally connected to the first radiating fin portions 14-1 and 14-2 using the end portions of the thin plate material, and further, heat is applied to the second radiating fin portions 8-1 and 8-2. Connected.

  That is, as a heat radiating fin portion, a first heat radiating fin portion (using the end portion of the laminated thin plate material as the heat radiating fin portion) 14 in which fins are arranged in a direction orthogonal to the rotation axis of the centrifugal fan, Two radiating fin portions having different fin directions are provided with the radiating fin portion 8 in which fins are arranged in parallel to the rotation axis of the centrifugal fan.

  The plurality of thin plate members 2 having a predetermined shape are provided with a circular opening for accommodating a centrifugal fan (not shown) at a substantially central portion. The thin plate materials are stacked with a predetermined gap, and a cylindrical hollow portion for accommodating the centrifugal fan is formed by a circular opening. The laminated thin plate materials form a part of a case that houses the centrifugal fan. The laminated thin plate material includes an air guiding portion formed by processing.

The heat radiating fin portion 8 is connected to the end portion of the thin plate member 2, and the air guided to the air guiding portion of the thin plate member 2 passes through it. The wind of the centrifugal fan is blown out from a blowout port provided at two orthogonal end portions of the thin plate member 2 as shown by arrows in FIGS.
In a heat sink with a centrifugal fan, the entire surface is usually joined to the end of the thin plate material so as to surround the air inlet at the top of the laminated thin plate material.

  In the heat sink of the present invention, as described above, the heat sink is disposed so as to protrude to the outside of the thin plate material in which a part of the heat pipe is laminated, thereby facilitating the flow of air to the air inlet to the centrifugal fan. A plurality of heat pipes are used corresponding to the number of radiating fin portions. In the embodiment shown in FIG. 1, two flat heat pipes are used and attached along the entire circumference of the laminated thin plate materials.

  FIG. 2 is a partially enlarged view for explaining the radiation fin portion. As shown in FIG. 2, the condensing part of the heat pipe is thermally connected to the first radiating fin part 14 and the second radiating fin part 8. As for the 1st radiation fin part 14, the edge part of the laminated | stacked thin board | plate material is utilized as a radiation fin part as it is. As will be described later, cut and raised portions are formed in the laminated thin plate materials, and heat is transferred between the thin plate materials. Thus, the wind of the centrifugal fan induced by the cut and raised portion flows through the end portion of the thin plate material, that is, the first radiating fin portion while drawing a curve as indicated by an arrow in the figure.

In this embodiment, the second heat dissipating fin portion 8 has a substantially U-shaped fin composed of an upper surface, a vertical surface, and a bottom surface arranged in parallel. The direction of the fin is parallel to the rotation axis of the centrifugal fan. As shown in FIG. 2, the second radiating fin portion passes the wind of the centrifugal fan parallel to the direction of the fin of the radiating fin portion. In other words, the centrifugal fan is disposed in a portion where the wind of the centrifugal fan flows parallel to one side of the outlet. As described above, since two different types of heat dissipating fin portions are provided, the wind of the centrifugal fan smoothly passes between the fins, and the heat dissipating efficiency is dramatically improved.

  FIG. 3 is a perspective view showing an example of a thin plate material. As shown in FIG. 3, the thin plate material 2 is made of a thin plate material that is partially processed. That is, a substantially L-shaped cut-and-raised portion 11 composed of a vertical portion 12 and a horizontal portion 13 formed by cutting a predetermined portion of the thin plate material 2 and bending the cut-out portion, and an opening generated by the cutting and raising. 10 is provided. The incision is performed, for example, by making incisions into three pieces in a U-shape. Thus, since the thin plate material 2 is rich in workability, various processing is possible according to the situation.

  The cut-and-raised portion 11 has a vertical portion 12 that defines the height between the thin plate materials when a plurality of processed thin plate materials 2 are stacked, and the horizontal portion 13 is joined to the other thin plate materials 2 to generate heat. Connected. Thus, the cut-and-raised portion 11 has a function of performing heat conduction between the thin plate members 2. Further, the vertical portion 12 of the cut-and-raised portion 11 is disposed at a predetermined position as a wall surface and functions as a guide portion that guides the cooling air passing between the plurality of laminated thin plate members 2 in a desired direction. An example of the flow of wind generated by the centrifugal fan is indicated by arrows. As shown by the arrows in FIG. 3, the vertical portions 12 of the plurality of cut-and-raised portions 11 arranged at predetermined positions serve as wall surfaces to restrict the flow of the wind, and the wind generated by the centrifugal fan is guided in a desired direction. Is done.

  Thus, the shape and size of the cut-and-raised portion 11 can be variously set according to the heat conduction by the connection with the other thin plate member 2 and the induction direction of the cooling air. Thin plate materials with excellent workability can be used in various situations and are extremely flexible. The opening 10 generated by cutting and raising facilitates the movement of the cooling air between the laminated thin plates 2, and the opening 10 is used to change the desired thin plate 2 to another thin plate 2. The vertical portion 12 of the cut and raised portion 11 can be communicated.

  For example, the vertical portion 12 of the cut-and-raised portion 11 of the lowermost thin plate member 2 is formed long and penetrates the opening 10 generated by the cut-and-raised portion of the other thin plate member 2 to the back surface of the uppermost thin plate member 2. The horizontal part 13 is thermally connected and joined. In this way, communication with the desired thin plate material 2 is possible, and heat can be conducted to the desired thin plate material 2. In addition, the shape of the thin plate material 2 can be appropriately set depending on the location of the centrifugal fan, the space that can be used as a heat sink, and the like.

  FIG. 4 is a diagram illustrating a state in which a plurality of processed thin plate materials are stacked. FIG. 4 shows a state in which four processed thin plate materials are stacked. The state which looked at the laminated sheet material from diagonally downward is shown. As shown in the thin plate material 2-4 positioned at the bottom of the four laminated thin plate materials 2-1, 2-2, 2-3, 2-4, a plurality of each formed by cutting and raising in a desired direction The cut-and-raised part 11 is provided.

  The cut-and-raised part 11 is formed in a substantially L-shape consisting of a vertical part 12 and a horizontal part 13 by cutting and raising the three sides of the rectangle and bending the tip part in the horizontal direction. The horizontal portion 13 of the cut-and-raised portion 11 is formed on a flat surface in order to facilitate thermal connection with other thin plate materials. A plurality of openings 10 generated by cutting and raising are provided in the thin plate member 2.

  In this aspect, the height of the cut-and-raised portion of the thin plate material 2-4 (the height of the vertical portion) is substantially the same. Similarly, the remaining three thin plate members 2-1, 2-2, and 2-3 are formed with cut-and-raised portions 11 each having a vertical portion 12 and a horizontal portion 13 having a size corresponding to a substantially corresponding position. Has been. A flat heat pipe 4 is joined and thermally connected to the surface of the uppermost thin plate member 2 so as to surround the peripheral portion of the thin plate member 2. The thin plate materials 2-1, 2-2, 2-3, and 2-4 processed in this way are thermally applied to the back surface of the adjacent thin plate material 2 in which the horizontal portions 13 of the cut and raised portions 11 are laminated. Connected to. The vertical portion 12 of the cut-and-raised portion 11 is positioned like a wall surface, and its direction is set so as to regulate and guide the flow of cooling air from the centrifugal fan in a desired direction.

  When the above-described four processed thin plate members 2 are laminated, the thin plate member 2 is joined at the horizontal portion 13 of the cut-and-raised portion 11, so that heat conduction is performed between the laminated thin plate members 2. Furthermore, the cooling air can communicate with each other between the lowermost plate and the uppermost thin plate material through the opening 10 generated by cutting and raising. Thus, the heat of the heat pipe transmitted to the uppermost thin plate member 2 is conducted to the other thin plate members 2 and moved toward the heat radiation fin portions 8 and 14 by the centrifugal fan.

  The height of the vertical portion 12 of the cut and raised portion 11 can be set as appropriate. FIG. 5 is a partially enlarged view illustrating a state in which the cut and raised portions 11 having the vertical portions 12 having different heights are combined. As shown in FIG. 5, the height of the vertical portion 12 of the cut and raised portion 11 is changed between the thin plate members 2. The lowermost thin plate member 2 includes a cut-and-raised portion 11 including a vertical portion 12-3 and a horizontal portion 13-3. The second thin plate member 2 from the bottom includes a cut-and-raised portion 11 including a vertical portion 12-2 and a horizontal portion 13-2.

  As shown in FIG. 5, for example, the cut-and-raised portion 11 of the thin plate material 2-3 on the lower side is set so that the vertical portion 12-3 is long (high), and the opening 10 of the thin plate material 2-2 is set. It penetrates and the horizontal part 13-3 of the cut-and-raised part 11 is joined and thermally connected to the back surface of the thin plate material 2-1. Thus, the height of the vertical portion 12 can be changed according to the situation such as the size of the gap between the thin plates. For example, heat in which the vertical portion 12 of the thin plate member 2 located at the lower part of the four laminated thin plate members 2 is directly joined to the uppermost thin plate member 2 and is thermally connected to the uppermost thin plate member 2. The heat of the pipe 4 can be directly moved to the lowermost thin plate member 2 through the cut-and-raised portion 11 to increase the cooling efficiency. When joining one cut-and-raised part through the opening of another thin plate material and joining it to the back surface of the thin plate material, the position of the cut-and-raised part overlaps, so the horizontal part of the cut and raised part may overlap, The bending direction of the horizontal portion may be changed so as to avoid overlapping.

  FIG. 6 is a diagram for explaining the flow of the wind of the centrifugal fan that is guided by the raised portion between the laminated thin plate members. The laminated thin plate member 2 is provided with a plurality of cut and raised portions 11 and an opening 10 formed by the cut and raised portions. The cut-and-raised part is arranged so as to guide the wind flow of the centrifugal fan to a desired position with a small resistance. The wind of the centrifugal fan is flowing as shown by the arrows in the figure. A second heat dissipating fin portion 8 is provided in a portion flowing in parallel with the blowout port, and a first heat dissipating fin portion is provided in a portion where the flow of the wind is bent. In this way, wind that could not be used conventionally can also be used for cooling, and the performance of the heat sink is greatly improved.

With reference to FIG. 1, the heat sink of the present invention will be described in more detail.
As shown in FIG. 1, the flat heat pipe 4 is joined and thermally connected to the surface of the uppermost thin plate member 2-1 of the laminated thin plate members 2. In the embodiment shown in FIG. 1, two flat heat pipes 4-1 and 4-2 are arranged. The heat pipes 4-1 and 4-2 are thermally formed by joining one end portion 5-1 and 5-2 as a heat absorbing portion to the portion of the thin plate material 2-1 to which the heat generating component is thermally connected. Connected. As shown in FIG. 1, each of the heat pipes 4-1 and 4-2 is disposed with a space 7 between the laminated thin plate members 2.

  In other words, the heat pipes 4-1 and 4-2 are arranged in the same plane and are arranged so as to protrude outside the thin plate material 2, which is partially laminated. 7 are formed. In the present invention, the heat pipes 4-1 and 4-2 are not joined to the thin plate member 2-1 so as to surround the air inlet 3, but as described above, as described above, the heat pipes 4-1 and 4-2. Are disposed so as to protrude to the outside of the thin plate material 2 on the same surface, and the space portion 7 is formed between the thin plate material 2 and the thin plate material 2. Thus, when a part of the heat pipes 4-1 and 4-2 is projected to the outside of the thin plate material 2 on the same surface, the thickness of the entire heat sink 1 does not change, and the flow of air to the intake port 3 is increased. can do.

  As a result, when the centrifugal fan is rotated, the cold air passes through both the upper and lower surfaces of the heat pipes 4-1 and 4-2 that protrude outward and form the space 7 between the thin plate member 2. Flows toward the air inlet 3. Accordingly, a part of the heat pipes 4-1 and 4-2 can be cooled by the cold air flowing to the intake port 3. Further, when another radiating fin portion (not shown) is connected to the portion of the heat pipes 4-1 and 4-2 protruding outward and forming the space portion 7 between the thin plate member 2, The heat pipes 4-1 and 4-2 are cooled by the cold air flowing toward the air, and the cooling efficiency is further increased.

  The heat pipes 4-1 and 4-2 protrude outward and form a space portion 7 between the thin plate member 2, and then return to the uppermost surface of the thin plate member 2. 14 and thermally connected. For example, the uppermost part 9 of the laminated thin plate members 2 may be bent to sandwich the heat pipes 4-1 and 4-2 from both sides. By doing so, the condensed portion 6 of the heat pipe 4 is joined to the end portion of the thin plate material and thermally connected by the processed thin plate material 2.

  In one aspect of the thin heat pipe of the present invention, two different types of radiating fin portions 8 and 14 are provided. One radiating fin portion 8 is a first radiating fin portion made of a plurality of thin plate members attached to the end portion of the processed thin plate material 2. The fins of the first heat radiating fin portion 8 are arranged parallel to the axial direction of the centrifugal fan (that is, in the vertical direction). As described above, the first radiating fin portion 8 includes, for example, a plurality of substantially U-shaped plate members having a bottom surface, a vertical surface, and a top surface arranged in parallel, and the vertical surface is in the axial direction of the centrifugal fan. They are arranged in parallel.

  A plurality of fins are arranged in parallel on the top and bottom surfaces to form a flat surface. For example, as shown in FIG. 1, one surface forms a heat receiving surface, and is joined and thermally connected to the lower surfaces of the heat pipes 4-1 and 4-2. The first radiating fin portions 8-1 and 8-2 are, for example, a wind guided through the laminated thin plate members 2 approximately on the vertical surfaces of the first radiating fin portions 8-1 and 8-2. Located in the corners of the heat sink, flowing in parallel. As shown in FIG. 1, the first radiating fin portions 8-1 and 8-2 can be arranged in the same number as the number of heat pipes 4-1 and 4-2.

  In the other radiating fin portion, the end of the laminated thin plate material 2 forms the second radiating fin portion 14. That is, as shown in FIG. 1, the thin plate material portions 14-1 and 14-where the condensing portions 6-1 and 6-2 of the flat heat pipes 4-1 and 4-2 are joined and thermally connected. 2 are arranged in parallel in a direction perpendicular to the axial direction of the centrifugal fan (that is, in the horizontal direction).

  This portion is guided to the laminated thin plate material 2 by the vertical portion 12 of the cut and raised portion 11 formed by processing, and wind (including curved wind) flowing in an oblique direction passes through the exhaust port. As described above, by providing a plurality of types of heat radiation fins 8 and 14 having a shape corresponding to the wind flow of the centrifugal fan, the flow of wind flowing between the laminated thin plate materials becomes smooth, and the heat dissipation effect is improved. Can be increased.

  In addition, the substantially circular opening formed in a part of thin plate material is provided, and the centrifugal fan is accommodated in the cylindrical hollow part formed by laminating | stacking several thin plate materials.

  According to the present invention, it is possible to provide a heat sink excellent in cooling efficiency in which the wind of the centrifugal fan can smoothly pass through the radiating fins.

FIG. 1 is a perspective view for explaining one embodiment of the heat sink of the present invention. FIG. 2 is a partially enlarged view for explaining the radiation fin portion. FIG. 3 is a perspective view showing an example of a thin plate material. FIG. 4 is a diagram illustrating a state in which a plurality of processed thin plate materials are stacked. FIG. 5 is a partially enlarged view illustrating a state in which the cut and raised portions 11 having the vertical portions 12 having different heights are combined. FIG. 6 is a diagram for explaining the flow of the wind of the centrifugal fan that is guided by the raised portion between the laminated thin plate members.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat sink 2 Thin plate material 3 Cavity part, inlet 4 Heat pipe 5 Heat absorption part 6 of heat pipe 6 Heat pipe condensing part 7 Space part 8 Radiation fin part 9 Bent part 10 of thin plate material Opening part 11 Cut and raised part 12 Vertical portion 13 Horizontal portion 14 Second radiating fin portion 15 Centrifugal fan

Claims (9)

A hollow portion that houses the centrifugal fan; and a blowout port that is stacked with a predetermined gap in a direction of a rotation axis of the centrifugal fan and blows out the wind of the centrifugal fan from two linear end portions orthogonal to each other. A plurality of thin plate-like bodies,
A plurality of heat dissipating fins arranged in parallel with the direction of the rotation axis of the centrifugal fan, and the wind of the centrifugal fan is arranged on an extension of a tangent line on the outer periphery of the centrifugal fan flowing in parallel with one side of the outlet. A second radiating fin portion,
A first radiating fin portion having a plurality of radiating fins formed by the end portions of the laminated thin plate-like body provided at a position other than the second radiating fin portion of the outlet;
One end is thermally connected to the portion of the thin plate-like body that is thermally connected to the heat-generating component, and the other end is heated to the first and second radiating fin portions. At least one heat pipe connected in a mechanical manner ;
Heat sink with a.   The first radiating fin portion is arranged in a direction perpendicular to the axial direction of the centrifugal fan, and the second radiating fin portion is arranged in parallel with a fin in a direction parallel to the axial direction of the centrifugal fan. The heat sink according to claim 1. The thin plate-like body includes an air guide portion that guides air flowing through a space formed by stacking, and the second heat dissipating fin portion is configured such that the wind of the centrifugal fan flows in parallel with one side of the air outlet. is disposed in a portion have said first radiation fin portion is disposed on the other portion, the wind induced by the air guide section, the first heat radiation fin unit and the second heat radiating fin portion The heat sink according to claim 1 or 2, which passes.   The thin plate-like body is provided with a substantially L-shaped cut-and-raised part composed of a vertical part and a horizontal part formed by cutting and bending a predetermined part, and an opening formed by the cut-and-raised part, The heat sink according to claim 3, wherein the horizontal portion is thermally connected to another thin plate-like body, and the air guiding portion is formed of the cut and raised portion.   The L-shaped cut-and-raised portion of the thin plate member passes through the opening formed in another thin plate member, and the horizontal portion is thermally connected to a predetermined thin plate member. Item 5. The heat sink according to item 4.   The heat sink according to any one of claims 1 to 5, wherein the second radiating fin portion is formed by arranging generally U-shaped fins including an upper surface portion, a vertical surface portion, and a bottom surface portion in parallel.   The heat sink according to any one of claims 1 to 6, wherein at least a part of the heat pipe is disposed with a space between the thin plate-like body.   The heat sink according to claim 7, wherein the heat pipe is disposed so that cooling air flows through an upper surface and a lower surface of a portion of the heat pipe disposed so as to form the space portion.   The heat pipe is composed of two flat heat pipes, and the heat pipe extends in different directions from the portion of the thin plate-like body to which the heat-generating component is thermally connected so as to surround the thin plate-like body. The heat sink according to claim 1, wherein the heat sink is arranged.

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