JP6972090B2 - Heat dissipation device - Google Patents

Description

The present invention relates to, for example, a heat radiating device for cooling a heating element such as a circuit component mounted on a substrate.

For example, as a heat radiating device for cooling a heating element such as a circuit component of an electronic device mounted on an aircraft, a device using a heat transfer plate formed by laminated molding of a metal material is known. The apparatus of Patent Document 1 has a heat transfer plate provided with a square wave-shaped flow path, and cools a heating element in contact with the heat transfer plate by circulating a refrigerant such as water while colliding with the inner surface of the flow path. ..

Japanese Unexamined Patent Publication No. 2016-25349

Since the heat transfer plate of Patent Document 1 forms a flow path in a flat plate-shaped main body, the cross-sectional area of the flow path is small and the flow path resistance is large. Moreover, since the heat transfer plate circulates the refrigerant while colliding with the inner surface of the flow path, the amount of the refrigerant that can be circulated per unit time is small. Therefore, the heat transfer plate of Patent Document 1 has a low ability to cool a heating element, and it is difficult to sufficiently cool a heating element having a relatively high temperature such as a circuit component of an electronic device mounted on an aircraft.

Therefore, it is desired to develop a heat radiating device that can effectively cool a heating element having a large amount of heat generation and can be formed compact and lightweight.

Heat dissipation device of the present invention, a plate-shaped heat dissipating body having therein a flat one flow path and having a surface in contact with the heating body is provided in an the flow channel together with the radiator, the flow A plurality of airfoil fins whose longitudinal directions intersect in the flow direction of the refrigerant passing through the path, and the cross-sectional shape of each intersecting the longitudinal directions is an airfoil shape in which the chord line is along the flow direction of the refrigerant. possess a plurality of the airfoil fins and comprising a plurality of said airfoil fins first and airfoil fins the longitudinal direction in the first direction is inclined intersecting the flow direction, said flow direction It has a second airfoil fin whose longitudinal direction is inclined in a second direction different from the intersecting first direction, and in the flow path, a plurality of the first airfoil fins and a plurality of the airfoil fins. The second airfoil fins are alternately arranged along the flow direction, and the first airfoil fin and the second airfoil fin cross each other .

According to the heat dissipation device of the present invention may be formed into small size and light weight it is possible to cool the high heat generating element calorific value effectively.

FIG. 1 is a schematic view showing a heat dissipation device according to an embodiment of the present invention. FIG. 2 is an external perspective view showing a heat radiating body of the heat radiating device of FIG. FIG. 3 is a partially enlarged perspective view showing an example of the arrangement of a plurality of airfoil fins provided in the flow path of the radiator of FIG. 2. FIG. 4 is a partially enlarged perspective view showing another example of the arrangement of the plurality of airfoil fins provided in the flow path of the radiator of FIG. 2.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the heat radiating device 1 has a plate-shaped heat radiating body 4 arranged in contact with a circuit component 3 mounted on the substrate 2. In FIG. 1, the heat radiating body 4 is shown separated from the board 2 in order to make the structure of the board 2 easy to see. However, when the heat radiating device 1 is used, the heat radiating body 4 comes into contact with the circuit component 3 mounted on the board 2. Be placed. In addition to this, the heat radiating device 1 has a suction device 10 for circulating air in one flat flow path 5 provided so as to penetrate the inside of the heat radiating body 4. A plurality of airfoil fins 6 (6a, 6b) (FIGS. 2 and 3) are provided in the flow path 5 of the radiator body 4. The heat radiating device 1 of the present embodiment is used by being incorporated in, for example, an electronic device mounted on an aircraft (not shown).

In recent years, the density of circuit boards in electronic devices mounted on aircraft has been increasing, and the amount of heat generated by circuit components mounted on the boards has also tended to increase. On the other hand, electronic devices mounted on aircraft are required to be smaller and lighter. For example, the width of the slot for accommodating and arranging the circuit board is standardized to 20 mm. Therefore, it is desired to develop a heat radiating device that is compact and lightweight and has higher heat radiating performance.

As shown in FIGS. 1 and 2, the heat radiating body 4 of the heat radiating device 1 of the present embodiment is formed in the shape of a rectangular plate. The heat radiating body 4 is formed by laminating modeling of a metal material. The laminating direction of the metal material by the laminating molding is the thickness direction of the heat radiating body 4. The heat radiating body 4 has a surface 4a that can come into contact with the circuit component 3 mounted on the substrate 2. The heat radiating body 4 has a flat rectangular flow path 5 provided by connecting two end faces 4b and 4c of the four end faces facing each other and penetrating the heat radiating body 4.

The heat radiating body 4 has a thickness of, for example, 9 mm because it is housed and arranged together with the substrate 2 in the slot described above. If the thickness is larger than this, it will not fit in the standardized slot width. Further, in this case, the thickness of the flow path 5 of the heat radiating body 4 is about 5 mm, and the width of the flow path 5 is, for example, 150 mm.

The heat radiating body 4 has a plurality of airfoil fins 6 in the flow path 5. The plurality of airfoil fins 6 are integrally formed with the heat radiating body 4 by laminated molding. The plurality of airfoil fins 6 are provided in a posture along the flow direction of air passing through the flow path 5. An example of the structure and arrangement of the airfoil fin 6 will be described in detail later.

As shown in FIG. 1, the suction device 10 is arranged so as to face the end surface 4c of the radiator body 4 in which one end of the flow path 5 is open. The suction device 10 has a suction cup 11 having a suction opening 11a facing the end surface 4c, and a pump 12 (or a fan) for sucking the internal space of the suction cup 11. The internal space of the suction cup 11 is connected to the pump 12 via the suction pipe 13.

When the pump 12 of the suction device 10 is operated to suck air from one end side of the flow path 5 and allow air to flow through the flow path 5, the air comes into contact with the plurality of blade-shaped fins 6 and heats from the radiator 4. The hot air is sucked by the suction device 10. As a result, heat is taken from the circuit component 3 in contact with the radiator body 4, and the circuit component 3 is cooled.

(Example 1)
Hereinafter, an example of the shape and arrangement of the plurality of airfoil fins 6 of the radiator 4 will be described with reference to FIG.
The plurality of airfoil fins 6 are formed in substantially the same shape, and are provided integrally with the radiator 4 in a posture along the flow direction of air flowing through the flow path 5 of the radiator 4 (direction of arrow S in the figure). There is. The plurality of airfoil fins 6 are provided in such a posture that their longitudinal directions intersect with the distribution direction S. The airfoil fin 6 has a cross-sectional shape similar to that of an aircraft wing. The airfoil fin 6 is formed in a columnar shape having the same cross-sectional shape over its entire length. The airfoil fin 6 of the present embodiment has, for example, a NACA0009 airfoil cross-sectional shape, and is formed into a symmetrical airfoil in which the chord line and the center line coincide with each other.

The plurality of airfoil fins 6 have a direction in which the leading edge of the camber is arranged on the upstream side of the air flow direction S and the trailing edge of the camber is arranged on the downstream side of the flow direction S, and the chord line is of air. It is arranged in the flow path 5 in a posture that substantially coincides with the flow direction S. In other words, the plurality of airfoil fins 6 are arranged in the flow path 5 in a posture that does not obstruct the air flow as much as possible, that is, in a posture that minimizes the flow path resistance. Both ends of the plurality of airfoil fins 6 in the longitudinal direction are integrally connected to the inner surface of the flow path 5 of the radiator body 4.

The plurality of airfoil fins 6 are the plurality of first airfoil fins 6a whose longitudinal direction is inclined in the first direction (direction indicated by the arrow D1 in FIG. 3) where the air flow direction S intersects, and the longitudinal thereof. It has a plurality of second airfoil fins 6b whose direction intersects the air flow direction S and is inclined in a second direction (direction indicated by an arrow D2 in FIG. 3) different from the first direction. In other words, the plurality of airfoil fins 6 are provided so as to be inclined in either the first direction D1 or the second direction D2. In the present embodiment, the first direction D1 and the second direction D2 are orthogonal to each other, and the heat radiating body 4 is provided at an angle of 45 ° with respect to the surface 4a in contact with the circuit component 3, respectively. In other words, the plurality of first airfoil fins 6a are inclined in the same direction (first direction D1) and arranged in parallel with each other, and the plurality of second airfoil fins 6b are also arranged in the same direction (second direction D1). They are inclined in the direction D2) and arranged parallel to each other.

Focusing on the arrangement of the plurality of airfoil fins 6 along the flow direction S, the plurality of first airfoil fins 6a and the plurality of second airfoil fins 6b cover the entire length of the flow path 5 of the radiator 4. They are arranged alternately along the air flow direction S. The plurality of first airfoil fins 6a in the first stage on the most upstream side of the air flow direction S are arranged flush with each other on an imaginary surface whose leading edge is orthogonal to the flow direction S, and are arranged in a plane of the flow path 5. They are spaced apart at a predetermined pitch in the width direction, inclined at a predetermined angle, and arranged parallel to each other. The plurality of second airfoil fins 6b in the second stage are arranged flush with each other on an imaginary surface whose leading edge is orthogonal to the flow direction S, and are separated at a predetermined pitch in the width direction of the flow path 5. , Are inclined at a predetermined angle and arranged parallel to each other, and are arranged so as to partially overlap each other on the trailing edge side of the plurality of first airfoil fins 6a in the first stage. Further, the plurality of first airfoil fins 6a in the third stage are arranged flush with each other on an imaginary surface whose leading edge is orthogonal to the flow direction S, and are the same as the first airfoil fins 6a in the first stage. They are spaced apart at a pitch, tilted at the same angle, and arranged parallel to each other, and are arranged so as to partially overlap each other on the trailing edge side of the plurality of second airfoil fins 6b in the second stage. Similarly, a plurality of stages of airfoil fins 6a and 6b are arranged so as to alternately cross along the distribution direction S.

That is, a plurality of first airfoil fins 6a and a plurality of second airfoil fins 6b are alternately arranged along the air flow direction S, and a plurality of first stages of each stage adjacent to the air flow direction S. The airfoil fins 6a and the plurality of second airfoil fins 6b are arranged in a nested manner. In the present embodiment, the plurality of first airfoil fins 6a and the plurality of second airfoil fins 6b of each stage are arranged so as to be overlapped by a width slightly shorter than half of the chord length. Therefore, for example, the trailing edge of the plurality of first airfoil fins 6a in the first stage and the leading edge of the plurality of first airfoil fins 6a in the third stage are slightly separated from each other along the distribution direction S. Close to each other. Similarly, the trailing edges of the plurality of second airfoil fins 6b in the second stage and the leading edges of the plurality of second airfoil fins 6b in the fourth stage are slightly separated from each other along the distribution direction S. Close to each other.

Further, the plurality of first airfoil fins 6a in the first stage and the plurality of first airfoil fins 6a in the third stage are arranged side by side one-to-one in the air flow direction S, respectively. The plurality of second airfoil fins 6b in the stage and the plurality of second airfoil fins 6b in the fourth stage are also arranged one-to-one in the flow direction S. That is, in the present embodiment, since the plurality of first airfoil fins 6a and the plurality of second airfoil fins 6b are arranged one-to-one in the air flow direction S in a one-to-one manner, the flow path resistance is small. This allows air to flow through the flow path 5 at a sufficient flow rate. Even when the airfoil fin 6 alone is viewed, the surface shape has a shape with low air resistance, so that the flow path resistance can be suppressed to a low level.

When the surface 4a of the heat radiating body 4 of the heat radiating device 1 having the above structure is placed in contact with the circuit component 3 and the pump 12 is operated, air is sucked from one end side of the heat radiating body 4 and other than the heat radiating body 4. Air is circulated in the flow path 5 from the end 4b toward the end 4c. At this time, since air is circulated through the limited space in the flow path 5, the amount of air flowing through the flow path 5 can be made sufficient per unit time, and a large amount of air can be supplied to a plurality of airfoil fins. 6 can be efficiently contacted. Further, since the airfoil fins 6a and 6b are crossed and inclined with each other and are arranged one-to-one in a one-to-one manner along the distribution direction S, a plurality of airfoil fins 6a and 6b are arranged in the flow path 5. Despite being arranged at a high density, the flow path resistance can be suppressed to a low level, and a sufficient amount of air can be circulated.

The heat from the circuit component 3 is transferred to the plurality of airfoil fins 6 via the radiator 4 over time. As described above, when the pump 12 is operated and air flows through the flow path 5 of the radiator body 4, the air comes into contact with the surfaces of the plurality of airfoil fins 6, and the air is generated by the heat from the airfoil fins 6. Be warmed up. The air that has passed through the flow path 5 and has come into contact with the surfaces of the plurality of airfoil fins 6 is heated to a relatively high temperature and discharged from the flow path 5. As described above, the heat of the circuit component 3 is taken away by the heat radiating device 1, and the circuit component 3 is cooled.

As described above, in the present embodiment, since the airfoil fin 6 having a small flow path resistance is arranged in the airfoil 5 of the radiator body 4, the airfoil fin 6 of the air flowing in contact with the surface of the airfoil fin 6 is provided. It is possible to reduce the peeling of the boundary layer between the surface and the surface. Therefore, the pressure loss based on the flow path resistance in the flow path 5 of the heat radiating body 4 can be reduced, and a sufficient amount of air can be passed through the flow path 5 even though the heat radiating body 4 is made thinner and lighter and smaller. It can be distributed within, and the heat dissipation performance of the heat dissipation device 1 can be improved.

By the way, since the heat radiating body 4 of the first embodiment has a complicated structure in which a plurality of airfoil fins 6a and 6b are crossed, it is formed by laminated molding of a metal material as described above. Laminated modeling may require a support material depending on the shape of the modeled object. In laminated modeling, generally, a model is formed by gradually laminating and solidifying materials from below in the direction of gravity. Therefore, if there is no object that supports the material to be laminated from below (in the case of an overhanging shape), the material cannot be laminated as it is. Therefore, in such a case, it is necessary to support the newly laminated material from below by using the support material. In addition, it is usually necessary to remove the used support material from the modeled object and discard it after forming the modeled object.

Therefore, the shape of the heat radiating body 4 of the first embodiment has been devised so as to enable laminated modeling without using a support material. The heat radiating body 4 of the first embodiment is formed by laminating a metal material in the thickness direction (arrow Z direction in FIG. 3). In this case, when the plate-shaped body 41 on the upper side of the drawing of the heat radiating body 4 is finally laminated, there is a problem in laminating the overhanging portion without support by the airfoil fins 6a and 6b. Therefore, in the radiator 4 of the first embodiment, the pitch of the plurality of airfoil fins 6a and 6b is designed to be a narrow pitch of about 2 mm, and then the portion where the airfoil fins 6a support the plate-shaped body 41 and the airfoil fins. The arrangement positions of the airfoil fins 6a and 6b were devised so that the portions of 6b supporting the plate-shaped body 41 were aligned in a straight line along the air flow direction S. Then, an arch shape in which the inner surface of the flow path 5 (inner surface of the plate-shaped body 41) is convex upward between the support positions of the plate-shaped body 41 by the blade-shaped fins 6a (6b) adjacent in the width direction of the flow path 5. It was formed on the curved surface 42 of.

Generally, in laminated modeling, it is possible to perform modeling without using a support material up to a structure having an inclination angle of about 45 degrees in the vertical direction. Therefore, the airfoil fins 6a and 6b can be laminated without using a support material. However, the plate-shaped body 41 extending in the direction orthogonal to the vertical direction (horizontal direction) cannot be laminated as it is. On the other hand, the heat radiating body 4 of the first embodiment supports the plate-shaped body 41 from below by a plurality of blade-shaped fins 6a and 6b provided at a pitch of 2 mm. Moreover, the inner surface of the flow path 5 is formed on the curved surface 42 between the airfoil fins 6a (6b) adjacent to each other in the width direction of the flow path 5. Therefore, laminated modeling without using a support material is possible.

As described above, since the heat radiating body 4 of the first embodiment can be formed by laminated molding without using a support material, it is not necessary to remove the support material after manufacturing the heat radiating body 4, and a desired shape is realized. can do. Further, since the heat radiating body 4 of the first embodiment can be laminated without using a support material, the work required for the construction of the support material becomes unnecessary, and the manufacturing cost can be reduced accordingly.

(Example 2)
FIG. 4 is a partially enlarged perspective view showing another example in which the arrangement of the airfoil fins 6a and 6b of the radiator body 4'is changed. The heat radiating body 4'of the second embodiment has substantially the same structure as the heat radiating body 4 of the first embodiment described above, except that the arrangement of the airfoil fins 6a and 6b is different. Therefore, here, the components having the same function as the radiator 4 of the first embodiment described above are designated by the same reference numerals, and detailed description thereof will be omitted.

The heat radiating body 4'of the second embodiment has a structure in which a plurality of first airfoil fins 6a and a plurality of second airfoil fins 6b are alternately arranged along the air flow direction S. Also in the heat radiating body 4'of Example 2, a plurality of airfoil fins 6a and 6b are arranged in the flow path 5 having a thickness of 5 mm. The trailing edge of the plurality of first airfoil fins 6a on the upstream side of the flow direction S and the leading edge of the plurality of second airfoil fins 6b of the second stage are along the flow direction S. Are separated. The plurality of first airfoil fins 6a and the plurality of second airfoil fins 6b are provided so as to intersect each other as in the first embodiment.

Even when the heat radiating body 4'of the second embodiment is used, the flow path resistance of the air passing through the flow path 5 of the heat radiating body 4'is reduced as in the case of using the heat radiating body 4 of the first embodiment described above. Therefore, the surface area of the plurality of airfoil fins 6a and 6b can be increased, and the heat dissipation performance can be improved.

In the radiator 4'of the second embodiment, the plurality of first airfoil fins 6a and the plurality of second airfoil fins 6b are separated from each other along the air flow direction S, and the air flowing through the flow path 5 flows. It contacts the entire leading edge of each airfoil fin 6a, 6b. On the other hand, in the radiator 4 of the first embodiment, since the plurality of first airfoil fins 6a and the plurality of second airfoil fins 6b partially overlap along the flow direction S, the flow path 5 The air flowing through the airfoil does not come into contact with the entire leading edge of each airfoil fin 6a, 6b. Therefore, the thermal resistance of the heat radiating body 4'of Example 2 is slightly lower than that of the heat radiating body 4 of Example 1. On the other hand, the pressure loss of the heat radiating body 4'of the second embodiment is slightly larger than that of the heat radiating body 4 of the first embodiment.

The present invention is not limited to the above embodiment, and can be variously modified at the implementation stage without departing from the gist thereof. In addition, each embodiment may be carried out in combination as appropriate, in which case the combined effect can be obtained. Further, the above-described embodiment includes various inventions, and various inventions can be extracted by a combination selected from a plurality of disclosed constituent requirements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, if the problem can be solved and the effect is obtained, the configuration in which the constituent elements are deleted can be extracted as an invention.

For example, in the above-described embodiment, the radiators 4 and 4'provided with a plurality of airfoil fins 6a and 6b have been described, but the present invention is not limited to this, and the shape has a low flow path resistance and the surface area in contact with the circulating air is large. Other shapes can be adopted as long as they are large enough.

Further, for example, in the above-described embodiment, the case where the plurality of airfoil fins 6a and 6b are aligned and arranged in the flow path 5 of the radiator bodies 4 and 4'has been described, but the present invention is not limited to this, and the plurality of airfoil fins are not limited to this. 6 may be arranged in a posture along the air flow direction, and the arrangement position may be random.

Further, in the above-described embodiment, the case where the plurality of first airfoil fins 6a and the plurality of second airfoil fins 6b are arranged so as to be inclined in the orthogonal direction has been described, but the present invention is not limited to the first. The airfoil fin 6a and the second airfoil fin 6b may be inclined at least in different directions. In order to improve the cooling efficiency, it is effective to increase the surface area by making the length of the airfoil fins 6 arranged in the flow path 5 as long as possible.

Further, in the above-described first embodiment, the case where the plurality of first airfoil fins 6a and the plurality of second airfoil fins 6b are arranged so as to be overlapped by approximately 1/2 pitch in the air flow direction has been described. Not limited to this, the length of overlapping the airfoil fins 6a and 6b in the distribution direction can be arbitrarily set, and it is not always necessary to overlap them. By arranging the plurality of first airfoil fins 6a and the plurality of second airfoil fins 6b so as to overlap each other in the flow direction, the airfoil fins 6a and 6b arranged in the flow path 5 having a limited length. The number can be increased, and the surface area of the airfoil fins 6a and 6b that the air contacts can be increased.

Further, in the above-described embodiment, the case where the curved surface 42 is provided on the inner surface of the flow path 5 between the airfoil fins 6a (6b) adjacent to each other in the width direction of the flow path 5 of the radiator body 4 has been described. The shape of the inner surface of the flow path 5 is not limited to the above, and may be any shape as long as laminated modeling is possible.
The heat radiating device according to the first aspect of the present invention has a plate-shaped heat radiating body having a surface in contact with the heating element and having one flat flow path inside, and an attitude along the flow direction of the refrigerant passing through the flow path. It has a plurality of wing-shaped fins provided in the flow path integrally with the radiator.
According to the heat dissipation device according to the second aspect of the present invention, the plurality of airfoil fins have a first airfoil fin inclined in a first direction intersecting the flow direction and a first direction intersecting the flow direction. It has a second airfoil fin, which is inclined in a second direction different from the above.
According to the heat dissipation device according to the third aspect of the present invention, the plurality of airfoil fins have a plurality of first airfoil fins inclined in the first direction intersecting the flow direction and a first airfoil fin intersecting the flow direction. It has a plurality of second airfoil fins inclined in a second direction different from the direction of the above and arranged downstream of the plurality of first airfoil fins along the flow direction.
According to the heat dissipation device according to the fourth aspect of the present invention, the plurality of first airfoil fins and the plurality of second airfoil fins are arranged so as to partially overlap each other in the distribution direction.
According to the heat dissipation device according to the fifth aspect of the present invention, the inner surface of the flow path includes a curved surface curved in an arch shape between two adjacent airfoil fins.
According to the heat radiating device according to the sixth aspect of the present invention, the heat radiating device is further provided so as to face one end of the flow path of the radiating body and to suck the air in the flow path.
According to the heat radiating device according to the first aspect of the present invention, since a plurality of airfoil fins are provided in one flat flow path, the heat radiating body can be made thinner, and the size and weight can be reduced. Moreover, since the airfoil fins are provided in the flow path integrally with the radiator, the flow path resistance can be reduced. Therefore, according to this heat radiating device, it can be configured to be compact and lightweight, and moreover, it is possible to effectively cool a heating element having a large amount of heat generation.
According to the heat dissipation device according to the second aspect of the present invention, since it has a first airfoil fin inclined in the first direction and a second airfoil fin inclined in the second direction, the first and second airfoil fins are provided. The refrigerant can be efficiently brought into contact with the airfoil fins of the airfoil, and the heating element can be effectively cooled.
According to the heat dissipation device according to the third aspect of the present invention, the plurality of second airfoil fins inclined in the second direction are arranged on the downstream side of the plurality of first airfoil fins inclined in the first direction. Therefore, the refrigerant can be efficiently brought into contact with each of the plurality of first airfoil fins and the plurality of second airfoil fins, and the heating element can be effectively cooled.
According to the heat dissipation device according to the fourth aspect of the present invention, more airfoil fins can be compactly arranged along the flow direction of the refrigerant, and the heat dissipation performance can be improved by that amount, and the heating element can be formed. Can be cooled effectively.
According to the heat radiating device according to the fifth aspect of the present invention, when the plate-shaped heat radiating body is formed by laminated molding in the thickness direction, the support material is not required, the support material does not need to be removed, and the manufacturing process of the device is not required. Can be simplified and the manufacturing cost of the device can be reduced.
According to the heat radiating device according to the sixth aspect of the present invention, since the air in the flow path of the radiating element is sucked, the amount of the refrigerant flowing in the limited space can be increased and the heat radiating performance can be improved. , The heating element can be cooled effectively.
The matters described in the original claims of the present application are added below.
[1] A plate-shaped radiator having a surface in contact with a heating element and having one flat flow path inside.
A plurality of airfoil fins provided in the flow path integrally with the heat radiating body in a posture along the flow direction of the refrigerant passing through the flow path.
Heat dissipation device with.
[2] The plurality of airfoil fins are
A first airfoil fin inclined in the first direction intersecting the distribution direction,
A second airfoil fin inclined in a second direction different from the first direction intersecting the flow direction,
The heat dissipation device of [1].
[3] The plurality of airfoil fins are
A plurality of first airfoil fins inclined in the first direction intersecting the distribution direction, and
With a plurality of second airfoil fins inclined in a second direction different from the first direction intersecting the flow direction and arranged downstream of the plurality of first airfoil fins along the flow direction. ,
The heat dissipation device of [1].
[4] The plurality of first airfoil fins and the plurality of second airfoil fins are arranged so as to partially overlap each other in the distribution direction.
[3] Heat dissipation device.
[5] The inner surface of the flow path includes a curved surface curved in an arch shape between two adjacent airfoil fins.
[1] Heat dissipation device.
[6] Further having a suction device arranged so as to face one end of the flow path of the heat radiating body and sucking air in the flow path.
The heat radiating device according to any one of [1] to [5].

1 ... radiator device, 2 ... substrate, 3 ... circuit parts, 4, 4'... radiator, 4a ... surface, 5 ... flow path, 6 ... airfoil fin, 6a ... first airfoil fin, 6b ... second Airfoil fins, 10 ... suction device, 41 ... plate-like body, 42 ... curved surface, D1 ... first direction, D2 ... second direction, S ... distribution direction.

Claims (4)

A plate-shaped radiator that has a surface that comes into contact with the heating element and has one flat flow path inside.
A plurality of airfoil fins provided in the flow path integrally with the radiator and having their respective longitudinal directions intersecting in the flow direction of the refrigerant passing through the flow path, and cross sections intersecting the respective longitudinal directions. A plurality of airfoil-shaped fins having a shape in which the chord wire has a blade shape along the flow direction of the refrigerant, and
Have a,
The plurality of airfoil fins
The first airfoil fin whose longitudinal direction is inclined in the first direction intersecting the distribution direction,
A second airfoil fin whose longitudinal direction is inclined in a second direction different from the first direction which intersects the flow direction,
Have,
In the flow path, the plurality of the first airfoil fins and the plurality of the second airfoil fins are alternately arranged along the flow direction, and the first airfoil fins and the second airfoil fins are arranged alternately. The mold fins cross,
Heat dissipation device. Each of the plurality of first airfoil fins is arranged so as to partially overlap with the second airfoil fins adjacent to the flow direction.
The heat radiating device of claim 1. The inner surface of the flow path includes a curved surface curved in an arch shape between two airfoil fins adjacent in the width direction of the flow path intersecting the flow direction.
The heat radiating device according to claim 1 or 2. Further having a suction device which is arranged to face one end of the flow path of the heat radiating body and sucks air in the flow path.
The heat radiating device according to any one of claims 1 to 3.

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