JP7625487B2 - Cooling Module - Google Patents

Description

This invention relates to a cooling module for heat-generating elements, such as a microprocessor, that cools the heat-generating elements.

In portable information devices, such as book- or notebook-sized portable computers and mobile communication devices, various multimedia information such as text, audio, and still and moving images is processed, so as the processing speed of the microprocessor increases, the amount of heat generated tends to increase accordingly.

Conventionally, the fins of heat sinks used to cool microprocessors mounted on notebook computers and the like have often been formed into a rectangular plate shape (Patent Document 1), but rectangular fins have the advantage of being able to dissipate heat more efficiently because they have a larger heat dissipation area.

Patent Document 2 discloses a cooling module that has a blowing section equipped with a heat dissipation section on the blowing side of a fan motor, and the heat dissipation section is formed by stacking multiple heat dissipation fins, and the heat dissipation fins are arranged radially from the fan motor in at least a part of the blowing section, thereby suppressing unevenness in the air blowing to the heat dissipation fins and allowing the air from the fan motor to flow smoothly without stagnation, thereby obtaining sufficient cooling performance within a limited external size and reducing noise caused by the air from the fan motor.Patent Document 3 discloses a cooling device that reduces the air resistance of the fins and maintains a quiet environment by making the shape of the fins themselves, rather than the arrangement of the fins, into a wing shape that extends long along the air flow.

Japanese Patent Application Publication No. 8-181260 JP 2005-51127 A JP 2000-332177 A

However, the square fins disclosed in Patent Document 1 have a large air resistance, so when square fins are placed in a position near the fan where the air volume is strong, turbulence occurs downstream of the airflow, which increases noise and reduces the air volume downstream of the airflow due to air resistance. On the other hand, the cooling module disclosed in Patent Document 2 requires a radial design for the heat dissipation section to suppress uneven air volume, which places restrictions on the placement of electronic components. The cooling device described in Patent Document 3 has fins in positions where there are strong and weak air volumes, and it is not possible to balance cooling efficiency and noise reduction to appropriately place the fins according to the strength of the air volume in order to deal with uneven air volume.

The present invention was made with this in mind, and its purpose is to provide a cooling module that combines multiple types of heat dissipation fins with different characteristics, allowing for an optimal balance between cooling performance and noise reduction without imposing restrictions on the overall shape of the heat dissipation section.

To achieve this object, the present invention provides a cooling module for dissipating heat from a heat-generating component, comprising a heat dissipation section formed by arranging a plurality of heat dissipation fins in parallel with each other, and a blowing means for blowing cooling air to the heat dissipation section, the heat dissipation fin having a main body portion formed in a plate shape, the main body portion having an upper side portion and a fin end portion facing the blowing means, the plurality of heat dissipation fins having a first heat dissipation fin in which the angle formed between the upper side portion and the fin end portion is a first acute angle, and a second heat dissipation fin in which the angle formed between the upper side portion and the fin end portion is a second acute angle, the second acute angle being greater than the first acute angle.

According to the present invention, by combining multiple types of acute-angled heat dissipation fins with different characteristics, it is possible to provide a cooling module that appropriately balances cooling performance and noise reduction.

1A and 1B are a plan view and a side view, respectively, of a cooling module of the present invention. FIG. 2 is a partially enlarged view of the heat dissipation portion, showing a main part of the heat dissipation portion as viewed from a cross section taken along line aa in FIG. FIG. 2A is a front view and FIG. 2B is a side view of the first heat dissipation fin of the first embodiment. 1A and 1B are a front view and a side view of a second heat dissipation fin according to the first embodiment. 1A and 1B are a front view and a side view of a third heat dissipation fin according to the first embodiment. FIG. 11 is an explanatory diagram showing a combination of heat dissipation fins in a heat dissipation section according to the first embodiment.

A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a cooling module 1 of the present invention. In the drawing, (A) is a plan view showing one embodiment of a cooling module 1 according to the present invention, and (B) is a side view. The cooling module 1 is configured to have a heat sink 2 that absorbs heat from a heat-generating component such as a microprocessor, and a fan 3 as a ventilation means for promoting heat dissipation from the heat sink 2. The heat sink 2 is attached in close contact with the heat-generating component, and has a heat receiving part (not shown) that receives heat from the heat-generating component, a heat pipe 5 as a heat transport part thermally connected to the heat receiving part, and a heat dissipation part 6 that receives heat from the heat pipe 5 and dissipates heat from the cooling module 1 to the outside by heat exchange with air blown by the fan 3.

Fan 3 draws in surrounding air from the axial direction of the fan and supplies the cooling air from fan 3 toward heat dissipation section 6. In Figure 1, the arrows show a schematic representation of the flow of cooling air from fan 3.

The heat pipe 5 injects a working fluid into a tube made of copper or other material with excellent thermal conductivity, and circulates the working fluid inside the tube, resulting in excellent thermal response. In this embodiment, the heat pipe 5 is formed into a flat type. Although the heat pipe 5 is preferable as the heat transport part, the present invention is not limited to this, and a heat dissipating metal plate or carbon fiber may also be used. The heat dissipation part 6 is composed of multiple plate-shaped heat dissipation fins 7, and these heat dissipation fins 7 are made of metals such as copper or aluminum with good thermal conductivity, or carbon materials.

Figure 2 is a partial enlarged view of the heat dissipation section 6, showing the main parts of the heat dissipation section 6 as seen from a cross section along line a-a in Figure 1, and is an enlarged view of the part of the heat dissipation section 6 to which cooling air is first supplied by the fan 3. The heat dissipation fins 7 of the present invention include heat dissipation fins 7a, 7b, and 7c, and the heat dissipation section 6 is made up of a plurality of these heat dissipation fins 7a, 7b, and 7c formed in a plate shape. As will be described in detail later, the heat dissipation section 6 is made up of a combination of two or more different types of heat dissipation fins 7a, 7b, and 7c. As shown in Figures 1B and 2, flat heat pipes 5 are attached to the heat dissipation fins 7a, 7b, and 7c. The heat dissipation fins 7a, 7b, and 7c have main body parts 8a, 8b, and 8c, and upper side parts 10a, 10b, and 10c are provided on one side of the main body parts 8a, 8b, and 8c, and are in contact with the heat pipes 5. The heat dissipation fins 7 are aligned so that the flat surfaces 20 of the main body portions 8a, 8b, and 8c face each other in parallel. The upper plate portions 34a, 34b, and 34c protrude from the upper side portions 10a, 10b, and 10c in a direction perpendicular to the flat surface 20. The upper plate portions 34a, 34b, and 34c are also in contact with the heat pipe 5. The heat dissipation fins 7a, 7b, and 7c have lower side portions 11a, 11b, and 11c on the other side of the main body portions 8a, 8b, and 8c, and lower plate portions 35a, 35b, and 35c protrude in a direction perpendicular to the flat surface 20. The heat dissipation portion 6 is formed by aligning the multiple heat dissipation fins 7a, 7b, and 7c in parallel to each other.

The heat dissipation fin 7 according to the present invention has U-shaped portions 22a, 22b, and 22c whose cross section is approximately U-shaped, and these U-shaped portions 22a, 22b, and 22c are formed from the flat plate surfaces 20a, 20b, and 20c of the main body portions 8a, 8b, and 8c, the upper plate portions 34a, 34b, and 34c, and the lower plate portions 35a, 35b, and 35c. Therefore, when the heat dissipation fins 7 are all arranged in a row facing the same direction, as can be seen in Figure 2, these U-shaped portions 22a, 22b, and 22c are blocked by the flat plate surfaces 20a, 20b, and 20c of the adjacent heat dissipation fins 7a, 7b, and 7c, and a plurality of square-shaped flow paths 30 are formed by the flat plate surfaces 20a, 20b, and 20c and the U-shaped portions 22a, 22b, and 22c. The heat dissipation section 6 is arranged so that these rectangular flow paths 30 are approximately parallel to the direction of the air from the fan 3. The direction of the cooling air is as shown by the arrows in Figures 1 and 3 to 5.

Next, the details of the heat dissipation fins 7 of the heat sink 2 of this embodiment will be described. The heat dissipation fins 7 have multiple plate-shaped main body portions 8a, 8b, and 8c with different shapes, and thus different heat dissipation and noise characteristics. Figures 3 to 5 show a front view (A) and a side view (B) of the first heat dissipation fin 7a, the second heat dissipation fin 7b, and the third heat dissipation fin 7c, each of which has different characteristics.

First, the common features of the heat dissipation fins 7a, 7b, and 7c are that the heat dissipation fins 7a, 7b, and 7c all have approximately rectangular vents 14a, 14b, and 14c. In this embodiment, the vents 14a, 14b, and 14c of the heat dissipation fins 7a, 7b, and 7c are aligned in position and shape. In other words, the vents 14 of the heat dissipation fins 7a, 7b, and 7c are aligned in position with the vents 14 of the adjacent heat dissipation fins 7a, 7b, and 7c.

The ventilation holes 14a, 14b, and 14c thus configured allow the cooling air received by the heat dissipation fins 7a, 7b, and 7c to escape sideways, thereby reducing the pressure loss of the entire heat dissipation section and allowing the entire heat dissipation section to dissipate heat in a well-balanced manner. From the viewpoint of reducing the pressure loss, it is preferable that the positions of the ventilation openings 14 of the heat dissipation fins 7a, 7b, and 7c are aligned with the positions of the ventilation openings 14 of the adjacent heat dissipation fins 7a, 7b, and 7c, as described above. However, as long as the pressure loss can be reduced, the positions of the ventilation openings 14 do not necessarily have to be aligned with the positions of the ventilation openings 14 of the adjacent heat dissipation fins 7a, 7b, and 7c.

The first heat dissipation fin 7a will be described in detail with reference to FIG. 3. The tip of the main body 8a of the first heat dissipation fin 7a is in the shape of an acute angle. Regarding the main body 8a, the main body 8a has an upper side 10a, a lower side 11a of the heat dissipation fin 7a that faces the upper side 10a and is provided parallel to the upper side 10a, a fin end 12a that connects the tip 23a of the upper side 10a and the tip 24a of the lower side 11a, and a rear end 13a, which are defined by these. An air vent 14a is provided in this main body 8a. The fin end 12a is the end of the heat dissipation fin 7a that faces the fan 3. The fin end 12a forms an acute angle α (hereinafter referred to as the first acute angle α) of less than 90 degrees with respect to the upper edge 10a of the heat dissipation fin 7a, while forming an angle (180°-α) of more than 90 degrees with respect to the lower edge 11a of the heat dissipation fin 7a. The first acute angle α is typically 15 to 20 degrees. The rear end 13a is the end of the heat dissipation fin 7a on the side facing the fin end 12a. The rear end side end 13a of the first heat dissipation fin 7a is formed approximately perpendicular to the upper edge 10a or the lower edge 10a.

The second heat dissipation fin 7b will be described with reference to FIG. 4. The main body 8b of the heat dissipation fin 7b has an upper side 10b, a lower side 11b that faces the upper side 10b and is parallel to the upper side 10b, a fin end 12b that connects the tip 23b of the upper side 10b and the tip 24b of the lower side 11b, and a fin rear end 13b, which are partitioned by these. The main body 8b is provided with an air vent 14b. The fin end 12b is the end of the heat dissipation fin 7b that faces the fan 3. The rear end 13b is the end of the heat dissipation fin 7b that faces the fin end 12b. The rear end side end 13b of the second heat dissipation fin 7b is formed approximately perpendicular to the upper side 10b or the lower side 10b. The second heat dissipation fin 7b has a body portion 8b that is acute-angled like the first heat dissipation fin 7a, but the angle of the body portion 8b of the second heat dissipation fin 7b is closer to a right angle than the first heat dissipation fin 7a. In other words, the angle between the upper side portion 10b and the fin end 12b of the body portion 8b that is upstream of the flow of cooling air is inclined at an acute angle β (hereinafter referred to as the second acute angle β) that is larger than the first acute angle α and smaller than a right angle.

The second heat dissipation fin 7b shown in FIG. 4 has a shape in which the wide portion at the rear of the fin that existed in the first heat dissipation fin 7a is eliminated when the ventilation holes 14 are aligned with the first heat dissipation fin 7a. This is an example of a shape that requires the fin to be designed to be short, for example, when electronic components are to be placed behind the fin.

The third heat dissipation fin 7c will now be described with reference to FIG. 5. As shown in the front view (B), the third heat dissipation fin 7c has a square-shaped main body 8c of the fin 7c. The main body 8c has an upper side 10c, a lower side 11c of the heat dissipation fin 7c that faces the upper side 10c and is parallel to the upper side 10c, a fin end 12c that connects the tip 23c of the upper side 10c and the tip 24c of the lower side 11c, and a rear end 13c, which define the main body 8c. An air vent 14c is provided in the main body 8c. The fin end 12c is an end of the heat dissipation fin 7c that faces the fan 3. The fin end 12c is also formed to form a right angle γ of 90 degrees with both the upper side 10c and the lower side 11c. The rear end 13c is the end of the third heat dissipation fin 7c that faces the fin end 12c. The rear end 13c is formed approximately perpendicular to the upper side 10c or the lower side 10c.

An example of the arrangement of the various fins 7a, 7b, and 7c will be described with reference to FIG. 6. FIG. 6 is an explanatory diagram showing an example of the arrangement of the various fins 7a, 7b, and 7c in the heat dissipation section 6. In the figure, a third heat dissipation fin 7c with a large surface area is arranged on both ends of the heat dissipation section 6. The third heat dissipation fin 7c is arranged adjacent to the first heat dissipation fin 7a, that is, the third heat dissipation fin 7c and the first heat dissipation fin 7a are arranged so as to be alternately stacked with each other. The first heat dissipation fin 7a and the third heat dissipation fin 7c are arranged alternately to form a first fin unit 17. Next to this first fin unit 17, a second fin unit 18, which is a fin unit formed by arranging only the second heat dissipation fin 7b, is arranged. These first fin units 17 and second fin units 18 are arranged alternately with each other as a fin unit unit.

In the embodiment of FIG. 6, the number of heat dissipation fins 7 included in the first fin unit 17 is 3 to 9. Specifically, the heat dissipation section 6 includes one first fin unit 17 consisting of nine heat dissipation fins 7a, 7c, two first fin units 17 consisting of seven heat dissipation fins 7a, 7c, one first fin unit 17 consisting of six heat dissipation fins 7a, 7c, and one first fin unit 17 consisting of three heat dissipation fins 7a, 7c.

The number of heat dissipation fins included in the second fin unit 18 is 7 to 15. Specifically, the heat dissipation section 6 includes two second fin units 18 each consisting of eight heat dissipation fins 7c, one second fin unit 18 each consisting of seven heat dissipation fins 7c, and one second fin unit 18 each consisting of 15 heat dissipation fins 7c.

In this embodiment, the first fin unit 17 and the second fin unit 18 are arranged alternately, and in order from the left side of the figure, the first fin unit 17 consisting of nine heat dissipation fins 7a, 7c is adjacent to the second fin unit 18 consisting of eight heat dissipation fins 7b, the first fin unit 17 consisting of seven heat dissipation fins 7a, 7c is adjacent to this second fin unit 18, the second fin unit 18 consisting of eight heat dissipation fins 7b is adjacent to this first fin unit 17, and the second fin unit 18 consisting of eight heat dissipation fins 7b is adjacent to this second fin unit 18. A first fin unit 17 consisting of seven heat dissipation fins 7a, 7c is arranged, a second fin unit 18 consisting of seven heat dissipation fins 7b is arranged adjacent to this first fin unit 17, a first fin unit 17 consisting of six heat dissipation fins 7a, 7c is arranged adjacent to this second fin unit 18, a second fin unit 18 consisting of 15 heat dissipation fins 7b is arranged adjacent to this first fin unit 17, and a first fin unit 17 consisting of three heat dissipation fins 7a, 7c is arranged adjacent to this second fin unit.

In Figure 6, third heat dissipation fins 7c with large surface areas are arranged on both ends of the heat dissipation section 6. This is to ensure that the wind from the fan 3 does not escape and hits the fins reliably in the arrangement shown in Figure 1.

Furthermore, in the embodiment of FIG. 6, the third heat dissipation fin 7c, which has a large surface area, is positioned adjacent to the first heat dissipation fin 7a, which has a small surface area and is highly efficient at taking in cooling air, among these three types of fins, and the third heat dissipation fin 7c and the first heat dissipation fin 7a are arranged alternately. Therefore, the first fin unit 17 is arranged at both ends of the heat dissipation section 6.

The number of fin units 17, 18 and the number of heat dissipation fins included in fin units 17, 18 are not particularly limited, but for example, when an electronic component is placed behind the fins, a second fin unit 18 can be placed in the area where the electronic component is present, and the number of heat dissipation fins included in the second fin unit 18 can also be freely changed according to the width of the electronic component. Then, a first fin unit 17 can be placed in the area where no electronic component is placed.

Next, the operation of the cooling module 1 of the present invention will be described. The microprocessor, which is a heat source, generates heat in response to its operation, and this heat is conducted to the heat sink 2 of the cooling module 1. When the temperature of the heat sink 2 rises above a certain level, the motor (not shown) of the fan 3, which is the air blowing means, is driven, and the fan 3 rotates together with the motor.

When the fan 3 rotates, air is sucked in through an intake port (not shown) of the fan 3, and this air is blown toward the various heat dissipation fins of the heat dissipation section 6. When the cooling air from the fan 3 flows into the heat dissipation section 6, it flows between the heat dissipation fins 7a, 7b, and 7c, and is discharged to the outside from the outlet section 21 of the heat dissipation section 6. This air forcibly cools the heat sink 2, and heat exchange between the heat pipe 5 is performed smoothly. Specifically, when the cooling air flows between the heat dissipation fins 7, this air comes into contact with each of the heat dissipation fins 7a, 7b, and 7c of the heat sink 2, and this contact cools the heat sink 2.

As described above, the heat dissipation section 6 includes heat dissipation fins 7a, 7b, 7c, which have different shapes for the main body parts 8a, 8b, 8c, and therefore different heat dissipation and noise characteristics. Therefore, by combining multiple types of these different types of heat dissipation fins 7a, 7b, 7c to form the heat dissipation section, a cooling module 1 is provided that has a good balance between cooling efficiency and noise suppression.

Here, the main body 8a of the first heat dissipation fin 7a has an acute angle shape. Therefore, the tip 23a of the upper side 10a can be positioned upstream of the tip 24a of the lower side 11a in the wind direction, and the fin end 12a of the fin 7a facing the fan 3 can be positioned so that it forms an acute angle α with the air flow direction. By making the main body 8a of the first heat dissipation fin 7a acute-angled, the cooling air can be smoothly directed at an angle against the heat dissipation fin 7a. Such an acute-angle shape can prevent the wind from hitting the fin, so noise is unlikely to be generated even if the fin is placed in a position where it is strongly exposed to the wind from the fan 3.

The second heat dissipation fin 7b has a body 8b formed at a second acute angle β, which is a gentle acute angle. This ensures the surface area required for heat dissipation, while allowing the cooling air to be directed smoothly at an angle, as with the first heat dissipation fin 7a, so that cooling efficiency is maintained while noise is reduced. This fin also has a shape that eliminates the wide portion at the rear of the fin that was present in the first heat dissipation fin 7a. This means that electronic components can be placed in the area without this wide portion.

The third heat dissipation fin 7c is formed so that the fin end 12c is at 90 degrees to both the upper edge 10c and the lower edge 11c, so that the tip 23c of the upper edge 10c of the heat dissipation fin 7c and the tip 24c of the lower edge 11c of the main body 8c of the heat dissipation fin 7c can be positioned so that they coincide in the wind direction. In other words, the heat dissipation fin 7c is positioned so that the cooling air hits the main body 8c of the fin 7c directly. Therefore, the main body 8c of the heat dissipation fin 7c has a rectangular shape when viewed from the front, so the surface area of the heat dissipation fin 7c is large, and the heat dissipation effect is greater than that of the heat dissipation fins 7a and 7b.

The amount of airflow from the fan 3 is relatively small at both ends of the heat dissipation section 6 compared to the center of the heat dissipation section 6. For this reason, placing emphasis on the size of the surface area at both ends of the heat dissipation section 6 rather than on noise control or wind intake at the fin tips can be expected to achieve a more efficient heat dissipation effect overall. Therefore, by placing the large-area third heat dissipation fins 7c at both ends of the heat dissipation section 6, the air from the fan 3 can be efficiently guided to the heat dissipation section 6, and the heat dissipation effect of the large-area third heat dissipation fins 7c can be efficiently achieved for the entire heat dissipation section 6.

As mentioned above, the first heat dissipation fin 7a, whose main body is formed at an acute angle, is placed next to the third heat dissipation fin 7c, which has a larger area. This placement maintains a structure in which no areas of locally high pressure are created in the heat dissipation section 6, thereby reducing the pressure loss value throughout the entire heat dissipation section.

Thus, in this embodiment, corresponding to claim 1, a cooling module 1 for dissipating heat from a heat-generating component is provided with a heat dissipation section 6 configured by arranging a plurality of heat dissipation fins 7a, 7b in parallel with each other, and a fan 3 which is a blowing means for blowing cooling air to the heat dissipation section 6, the heat dissipation fins 7a, 7b having main body portions 8a, 8b formed in a plate shape, the main body portions 8a, 8b having upper side portions 10a, 10b and fin end portions 12a, 12b facing the fan 3, and the plurality of heat dissipation fins The fins 7a, 7b have a first heat dissipation fin 7a in which the angle between the top edge portion 10a and the fin end portion 12a is a first acute angle α, and a second heat dissipation fin 10b in which the angle between the top edge portion 10b and the fin end portion 12b is a second acute angle β, and the second acute angle β is greater than the first acute angle α. By appropriately combining multiple types of heat dissipation fins 7a, 7b with different characteristics, a cooling module 1 can be provided that appropriately balances cooling performance and noise reduction.

In this embodiment, corresponding to claim 2, the plurality of heat dissipation fins include a third heat dissipation fin 7c in which the angle γ between the upper edge portion 10c and the fin end portion 12c is a right angle, and therefore a heat dissipation effect is expected from the third heat dissipation fin 7c, which has the largest area among the three types of heat dissipation fins 7a, 7b, and 7c.

In this embodiment, corresponding to claim 3, both ends of the heat dissipation section 6 are the third heat dissipation fins 7c, so that the wind from the fan 3 as the air blowing means is not allowed to escape and can be reliably directed at the fins 7c.

In this embodiment, corresponding to claim 4, the heat dissipation section 6 has a first fin unit 17 in which the first heat dissipation fins 7a and the third heat dissipation fins 7c are arranged alternately in parallel, thereby maintaining a structure in which no areas of locally high pressure are generated. This makes it easier for air to pass between the fins, and an overall efficient heat dissipation effect can be expected.

In this embodiment, in accordance with claim 5, the main body portions 8a, 8b, and 8c are provided with ventilation holes, which reduces the difference in wind pressure between the heat dissipation fins and can be expected to provide an overall efficient heat dissipation effect.

Another effect of the embodiment is that the heat dissipation section 6 can be provided with a second fin unit 18 that is configured by arranging multiple second heat dissipation fins 7b only. This makes it possible to achieve cooling performance while suppressing noise reduction, even when it is necessary to place electronic components in part of the heat dissipation section 6.

The first fin unit 17 and the second fin unit 18 can also be arranged alternately, and the heat dissipation fins included in the heat dissipation section can be arranged on a unit-by-unit basis. This makes it easier to arrange the heat dissipation fins while taking into account the balance between cooling performance and noise control.

In addition, by locating the ventilation holes 14 at the same position as the ventilation holes 14 of the adjacent heat dissipation fins, the difference in wind pressure between adjacent heat dissipation fins 7 can be more effectively eliminated, and a better heat dissipation effect can be expected overall.

The present invention is not limited to the above embodiment, and various modifications are possible within the scope of the invention. For example, the combination/arrangement of the multiple heat dissipation fins 7 is not limited to that shown in FIG. 6, and can be set appropriately depending on the fan's air volume and the direction of the cooling air. In this case, for example, the third heat dissipation fin 7c with a large area is arranged in the area where the air volume from the fan is weak, the heat dissipation fin 7a with a relatively small air resistance is arranged in the area where the air volume is strong, and the heat dissipation fin 7b is arranged in the area where the air volume is medium, thereby achieving a good balance between the cooling efficiency of the heat sink 2 and noise countermeasures.

1 Cooling module 2 Heat sink 3 Fan (air blowing means)
6 Heat dissipation portion 7a First heat dissipation fin 7b Second heat dissipation fin 7c Third heat dissipation fin 8a, 8b, 8c Main body portion 10a, 10b, 10c Upper side portion 12a, 12b, 12c Fin end portion 14a, 14b, 14c Ventilation hole 17 First fin unit 17
18 Second fin unit 18
α First acute angle β Second acute angle γ Right angle

Claims (5)

A cooling module that dissipates heat from a heat-generating component,
a heat dissipation section including a plurality of heat dissipation fins arranged in parallel with each other;
A blower means for blowing cooling air to the heat dissipation portion,
The heat dissipation fin has a main body formed in a plate shape,
The main body has an upper side portion and a fin end portion facing the air blowing means,
the plurality of heat dissipation fins include a first heat dissipation fin, the angle between the upper side portion and the fin end being a first acute angle, and a second heat dissipation fin, the angle between the upper side portion and the fin end being a second acute angle;
The cooling module, wherein the second acute angle is greater than the first acute angle. The cooling module according to claim 1, characterized in that the plurality of heat dissipation fins include a third heat dissipation fin in which the angle between the upper edge and the fin end is a right angle. The cooling module according to claim 2, characterized in that both ends of the heat dissipation section are the third heat dissipation fins. The cooling module according to claim 2 or 3, characterized in that the heat dissipation section has a first fin unit in which the first heat dissipation fins and the third heat dissipation fins are arranged alternately in parallel. 5. The cooling module according to claim 1, wherein the main body portion is formed with a vent hole.

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