Cooling Module

Abstract

To provide a cooling module 1 capable of appropriately balancing cooling performance and noise reduction.SOLUTION: The cooling module 1 for dissipating heat from heat-generating components includes a heat dissipating portion 6 configured by arranging a plurality of heat dissipating fins 7a and 7b in parallel, and air blowing means 3 for blowing cooling air to the heat dissipating portion 6. The heat dissipating fins 7a and 7b have main body portions 8a and 8b formed in a plate shape, and the main body portions 8a and 8b have upper side portions 10a and 10b, and fin end portions 12a and 12b facing the air blowing means 3. The plurality of heat dissipating fins 7a and 7b includes a first heat dissipating fin 7a in which the intersection angle between the upper side portion 10a and the fin end portion 12a is a first acute angle α, and a second dissipating fin 7b in which the intersection angle between the upper side portion 10b and the fin end portion 12b is a second acute angle β. The second acute angle β is larger than the first acute angle α.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a cooling module for a heat generating element, for cooling a heat generating element such as a microprocessor. [Background technology]

[0002] In portable information devices such as book- or notebook-sized portable computers and mobile communication devices, a variety of 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.

[0003] Conventionally, the fins of heat sinks used to cool microprocessors installed in notebook computers and the like have often been formed as rectangular plates (Patent Document 1), but rectangular fins have the advantage of allowing for a large heat dissipation area, resulting in high thermal efficiency in heat dissipation.

[0004] 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 a plurality of 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 blowing of air to the heat dissipation fins, and the air from the fan motor flows 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 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, thereby reducing the noise of the environment. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 8-181260 [Patent Document 2] JP 2005-51127 A [Patent Document 3] JP 2000-332177 A DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0006] However, the square fins disclosed in Patent Document 1 have a large air resistance, so when the square fins are arranged in a position near the fan where the air volume is strong, turbulence occurs downstream of the airflow, which increases noise, and there is also a problem that the air volume downstream of the airflow decreases due to air resistance. On the other hand, the cooling module disclosed in Patent Document 2 has a problem that the heat dissipation section needs to be designed to be radially arranged in order to suppress unevenness in the air volume, which limits the arrangement of electronic components. The cooling device described in Patent Document 3 has fins at the positions where the air volume is strong and weak, and it is not possible to balance cooling efficiency and noise reduction to appropriately arrange the fins according to the strength of the air volume to prevent unevenness in the air volume.

[0007] The present invention has been made with attention to these points, and its object is to provide a cooling module that can achieve an appropriate balance between cooling performance and noise reduction by combining multiple types of heat dissipation fins with different characteristics, without being restricted by the shape of the overall heat dissipation section. [Means for solving the problem]

[0008] In order to achieve this object, the present invention provides a cooling module for dissipating heat from a heat-generating component, comprising a heat dissipation section consisting of a number of heat dissipation fins arranged in parallel to each other, and a blowing means for blowing cooling air to the heat dissipation section, wherein the heat dissipation fin has a main body portion formed in a plate shape, the main body portion having an upper edge portion and a fin end portion facing the blowing means, and the number of heat dissipation fins include a first heat dissipation fin, the angle between the upper edge portion and the fin end being a first acute angle, and a second heat dissipation fin, the angle between the upper edge portion and the fin end being a second acute angle, and the second acute angle is greater than the first acute angle. Effect of the Invention

[0009] According to the present invention, by combining a plurality of 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. [Brief description of the drawings]

[0010] [Figure 1] 1A and 1B are a plan view and a side view, respectively, of a cooling module of the present invention. [Diagram 2] 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. [Diagram 3] FIG. 2A is a front view and FIG. 2B is a side view of the first heat dissipation fin of the same. [Figure 4] FIG. 2A is a front view and FIG. 2B is a side view of the second heat dissipation fin of the same. [Diagram 5] FIG. 11A is a front view and FIG. 11B is a side view of the third heat dissipation fin of the same. [Figure 6] FIG. 11 is an explanatory diagram showing a combination of heat dissipation fins in a heat dissipation section according to the first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, preferred embodiments of the present invention will be described 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 the 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 blowing 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 that is thermally connected to the heat receiving part and serves as a heat transport part, and a heat dissipation part 6 that receives heat from the heat pipe 5 and exchanges heat with air blown by the fan 3 to discharge heat from the cooling module 1 to the outside.

[0012] The fan 3 draws in surrounding air from the axial direction of the fan, and supplies cooling air from the fan 3 toward the heat dissipation section 6. In FIG.

[0013] The heat pipe 5 injects a working fluid into a tube made of copper or the like having excellent thermal conductivity, and circulates the working fluid inside the tube, thereby obtaining 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 be used. The heat dissipation part 6 is composed of a plurality of plate-shaped heat dissipation fins 7, and the heat dissipation fins 7 are made of metal such as copper or aluminum having good thermal conductivity, or a carbon material.

[0014] FIG. 2 is a partial enlarged view of the heat dissipation unit 6 showing the main part of the heat dissipation unit 6 as viewed from a cross section taken along line aa in FIG. 1, and shows an enlarged portion of the heat dissipation unit 6 to which cooling air is first supplied by the fan 3. The heat dissipation fin 7 of the present invention includes heat dissipation fins 7a, 7b, and 7c, and the heat dissipation unit 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 unit 6 is made up of a combination of two or more different types of heat dissipation fins 7a, 7b, and 7c. As shown in FIG. 1B and FIG. 2, the heat dissipation fins 7a, 7b, and 7c are attached with flat heat pipes 5. 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 dissipating fins 7 are aligned so that the flat plate 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 plate surface 20. The upper plate portions 34a, 34b, and 34c are also in contact with the heat pipe 5. The heat dissipating fins 7a, 7b, and 7c are provided with 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 plate surface 20. The heat dissipating portion 6 is formed by aligning the heat dissipating fins 7a, 7b, and 7c in parallel to each other.

[0015] The heat dissipating fin 7 according to the present invention has U-shaped portions 22a, 22b, 22c having a substantially U-shaped cross section, and the U-shaped portions 22a, 22b, 22c are formed from the flat plate surfaces 20a, 20b, 20c of the main body portions 8a, 8b, 8c, the upper plate portions 34a, 34b, 34c, and the lower plate portions 35a, 35b, 35c. Therefore, when the heat dissipating fins 7 are all arranged in a row facing the same direction, as shown in FIG. 2, the U-shaped portions 22a, 22b, 22c are blocked by the flat plate surfaces 20a, 20b, 20c of the adjacent heat dissipating fins 7a, 7b, 7c, and a plurality of rectangular flow paths 30 are formed by the flat plate surfaces 20a, 20b, 20c and the U-shaped portions 22a, 22b, 22c. Heat dissipation section 6 is disposed so that these rectangular flow paths 30 are approximately parallel to the direction of air from fan 3. The direction of the cooling air is as shown by the arrows in FIGS.

[0016] Next, the details of the heat dissipating fins 7 of the heat sink 2 of this embodiment will be described. The heat dissipating fins 7 have plate-shaped main bodies 8a, 8b, and 8c with different shapes, and thus have multiple fins with different heat dissipation characteristics and noise characteristics. Figures 3 to 5 show a front view (A) and a side view (B) of a first heat dissipating fin 7a, a second heat dissipating fin 7b, and a third heat dissipating fin 7c, each of which has different characteristics.

[0017] First, the common features of the heat dissipation fins 7a, 7b, and 7c are that the heat dissipation fins 7a, 7b, and 7c are each provided with a substantially rectangular vent hole 14a, 14b, and 14c. In this embodiment, the vent holes 14a, 14b, and 14c of the heat dissipation fins 7a, 7b, and 7c are aligned in position and shape. In other words, the vent holes 14 of the heat dissipation fins 7a, 7b, and 7c are aligned in position with the vent holes 14 of the adjacent heat dissipation fins 7a, 7b, and 7c.

[0018] The ventilation holes 14a, 14b, 14c thus configured allow the cooling air received by the heat dissipation fins 7a, 7b, 7c to escape laterally, 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 holes 14 of the heat dissipation fins 7a, 7b, 7c are aligned with the positions of the ventilation holes 14 of the adjacent heat dissipation fins 7a, 7b, 7c as described above. However, as long as the pressure loss can be reduced, the positions of the ventilation holes 14 do not necessarily have to be aligned with the positions of the ventilation holes 14 of the adjacent heat dissipation fins 7a, 7b, 7c.

[0019] The first heat dissipating fin 7a will be described in detail with reference to FIG. 3. The tip of the main body 8a of the first heat dissipating fin 7a has an acute angle. The main body 8a is defined by an upper side 10a, a lower side 11a of the heat dissipating fin 7a that faces the upper side 10a and is parallel to the upper side 10a, a fin end 12a that connects the tip 23a of the upper side 10a to the tip 24a of the lower side 11a, and a rear end 13a. The main body 8a is provided with an air vent 14a. The fin end 12a is an end of the heat dissipating 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 the upper side 10a of the heat dissipating fin 7a, while forming an angle (180°-α) of more than 90 degrees with the lower side 11a of the heat dissipating fin 7a. The first acute angle α is typically 15 to 20 degrees. The rear end 13a is the end of the heat dissipating fin 7a on the side facing the fin end 12a. The rear end 13a of the first heat dissipating fin 7a is formed approximately perpendicular to the upper side 10a or the lower side 10a.

[0020] The second heat dissipating fin 7b will be described with reference to FIG. 4. The main body 8b of the heat dissipating fin 7b has an upper side 10b, a lower side 11b facing the upper side 10b and parallel to the upper side 10b, a fin end 12b connecting 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 defined by these. The main body 8b is provided with an air vent 14b. The fin end 12b is the end of the heat dissipating fin 7b facing the fan 3. The rear end 13b is the end of the heat dissipating fin 7b facing the fin end 12b. The rear end 13b of the second heat dissipating fin 7b is formed substantially perpendicular to the upper side 10b or the lower side 10b. The second heat dissipating fin 7b has a main body 8b with an acute angle like the first heat dissipating fin 7a, but the angle of the main body 8b of the second heat dissipating fin 7b is closer to a right angle than that of the first heat dissipating fin 7a. That is, the second heat dissipating fin 7b has a main body 8b on the upstream side of the flow of cooling air, and the angle between the upper side 10b and the fin end 12b 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.

[0021] 4 has a shape in which the wide portion at the rear of the first heat dissipating fin 7a is eliminated when the ventilation holes 14 are aligned with the first heat dissipating 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.

[0022] The third heat dissipating fin 7c will now be described with reference to FIG. 5. As shown in the front view (B), the third heat dissipating fin 7c has a main body 8c of the fin 7c in a rectangular shape. The main body 8c is now described. The main body 8c has an upper side 10c, a lower side 11c of the heat dissipating fin 7c that faces the upper side 10c and is provided parallel to the upper side 10c, a fin end 12c that connects the tip 23c of the upper side 10c to the tip 24c of the lower side 11c, and a rear end 13c, and is defined by these. An air vent 14c is provided in the main body 8c. The fin end 12c is an end of the heat dissipating fin 7c that faces the fan 3. The fin end 12c is 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 an end of the third heat dissipation fin 7c that faces the fin end 12c. The rear end 13c is formed substantially perpendicular to the upper side portion 10c or the lower side portion 10c.

[0023] 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 having 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.

[0024] 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.

[0025] The number of heat dissipation fins included in the second fin unit 18 is 7 to 15, and 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.

[0026] In this embodiment, the first fin units 17 and the second fin units 18 are arranged alternately. 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 the second fin unit 18, the second fin unit 18 consisting of eight heat dissipation fins 7b is adjacent to the first fin unit 17, and the second fin unit 18 consisting of eight heat dissipation fins 7b is adjacent to the second fin unit 18. A first fin unit 17 consisting of seven heat dissipation fins 7a, 7c is arranged adjacent to the first fin unit 17, a second fin unit 18 consisting of seven heat dissipation fins 7b is arranged adjacent to the first fin unit 17, a first fin unit 17 consisting of six heat dissipation fins 7a, 7c is arranged adjacent to the second fin unit 18, a second fin unit 18 consisting of fifteen heat dissipation fins 7b is arranged adjacent to the first fin unit 17, and a first fin unit 17 consisting of three heat dissipation fins 7a, 7c is arranged adjacent to the second fin unit.

[0027] 6, third heat dissipation fins 7c having a large surface area 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 of FIG.

[0028] 6, the third heat dissipating fin 7c having a large surface area is arranged adjacent to the first heat dissipating fin 7a having a small surface area and high efficiency of taking in cooling air among these three types of fins, and the third heat dissipating fins 7c and the first heat dissipating fins 7a are arranged alternately. Therefore, the first fin units 17 are arranged at both ends of the heat dissipating section 6.

[0029] Note that 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, 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 second fin unit 18 can also be freely changed according to the width of the electronic component. Then, first fin unit 17 can be placed in the area where no electronic component is placed.

[0030] Next, the operation of the cooling module 1 of the present invention will be described. The microprocessor, which is a heat generating body, 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.

[0031] As the fan 3 rotates, air is sucked in through an intake port (not shown) of the fan 3, and this air is blown toward 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 the heat exchange between the heat pipe 5 is smoothly performed. 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.

[0032] As described above, the heat dissipation unit 6 includes the heat dissipation fins 7a, 7b, 7c, which have different shapes of the main bodies 8a, 8b, 8c and therefore different heat dissipation and noise characteristics. Therefore, by combining a plurality of different types of heat dissipation fins 7a, 7b, 7c to configure the heat dissipation unit, the cooling module 1 is provided with a good balance between cooling efficiency and noise suppression.

[0033] Here, the first heat dissipating fin 7a has a body 8a of the fin 7a with an acute angle. Therefore, the tip 23a of the upper side 10a can be positioned upstream of the tip 24a of the lower side 11a, and the fin end 12a of the fin 7a facing the fan 3 can be arranged to form an acute angle α with respect to the air flow direction. The acute angle shape of the body 8a of the first heat dissipating fin 7a allows the cooling air to be smoothly blown at an angle against the heat dissipating fin 7a. Such an acute angle shape can suppress the blow of the air against the fin, so that noise is unlikely to be generated even if the fin is placed in a position where the wind from the fan 3 hits it strongly.

[0034] 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 blown smoothly at an angle, as with the first heat dissipation fin 7a, so that the cooling efficiency is maintained while reducing noise. This fin also has a shape that does not have the wide portion at the rear of the fin that existed in the first heat dissipation fin 7a. This allows electronic components to be placed in the area without the wide portion.

[0035] The third heat dissipating fin 7c is formed such that the fin end 12c is at an angle of 90 degrees to both the upper side 10c and the lower side 11c, so that the tip 23c of the upper side 10c of the heat dissipating fin 7c and the tip 24c of the lower side 11c of the main body 8c of the heat dissipating fin 7c are positioned so that the cooling air directly hits the main body 8c of the fin 7c. Therefore, the main body 8c of the heat dissipating fin 7c has a rectangular shape when viewed from the front, so that the surface area of ​​the heat dissipating fin 7c is large, and the heat dissipation effect is greater than that of the heat dissipating fins 7a and 7b.

[0036] In addition, 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, at both ends of the heat dissipation section 6, placing emphasis on the size of the surface area rather than on noise countermeasures and wind intake at the fin tips can be expected to achieve a more efficient heat dissipation effect overall. Therefore, by arranging the third heat dissipation fins 7c with a large area 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 third heat dissipation fins 7c with a large area can be efficiently achieved for the heat dissipation section 6 as a whole.

[0037] As described above, the first heat dissipation fin 7a, whose main body is formed at an acute angle, is disposed next to the third heat dissipation fin 7c, which has a larger area. This arrangement maintains a structure in which no areas of locally high pressure are generated in the heat dissipation section 6, thereby reducing the pressure loss value of the entire heat dissipation section.

[0038] Thus, in this embodiment, corresponding to claim 1, a cooling module 1 for radiating heat from a heat-generating component is provided, the cooling module 1 including a heat radiating section 6 including a plurality of heat radiating fins 7a, 7b arranged in parallel with each other, and a fan 3 serving as a blowing means for blowing cooling air to the heat radiating section 6, the heat radiating fins 7a, 7b each having a plate-shaped main body portion 8a, 8b, the main body portion 8a, 8b each having upper side portions 10a, 10b and fin end portions 12a, 12b facing the fan 3, and the plurality of heat radiating The fins 7a, 7b include a first heat dissipation fin 7a in which the angle between the upper edge portion 10a and the fin end 12a is a first acute angle α, and a second heat dissipation fin 10b in which the angle between the upper edge portion 10b and the fin end 12b is a second acute angle β, and the second acute angle β is larger than the first acute angle α. Therefore, by appropriately combining multiple types of heat dissipation fins 7a, 7b with different characteristics, a cooling module 1 can be provided in which cooling performance and noise reduction are appropriately balanced.

[0039] 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 can be expected from the third heat dissipation fin 7c, which has the largest area among the three types of heat dissipation fins 7a, 7b, 7c.

[0040] 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 serving as a blowing means is not allowed to escape and can be reliably directed against the fins 7c.

[0041] In this embodiment, the heat dissipation section 6 has the first fin unit 17 in which the first heat dissipation fins 7a and the third heat dissipation fins 7c are arranged alternately in parallel, so that a structure can be maintained in which no localized high pressure occurs. This makes it easier for air to pass between the fins, and an efficient heat dissipation effect can be expected overall.

[0042] In this embodiment, corresponding to claim 5, ventilation holes are formed in the main body portions 8a, 8b, and 8c, thereby reducing the difference in wind pressure between the heat dissipation fins, and an overall efficient heat dissipation effect can be expected.

[0043] Another effect of the embodiment is that a second fin unit 18 configured by arranging only a plurality of the second heat dissipation fins 7b can be provided on the heat dissipation section 6. This makes it possible to exert cooling performance while suppressing noise reduction, even when electronic components need to be arranged on a part of the heat dissipation section 6.

[0044] In addition, the first fin unit 17 and the second fin unit 18 can be alternately arranged, and the arrangement of the heat dissipation fins included in the heat dissipation section can be performed on a unit basis. This makes it easier to arrange the heat dissipation fins while taking into account the balance between cooling performance and noise countermeasures.

[0045] In addition, by arranging the ventilation openings 14 so as to coincide with the positions of the ventilation openings 14 of the adjacent heat dissipation fins 7, the difference in wind pressure between the adjacent heat dissipation fins 7 can be more effectively eliminated, and a better heat dissipation effect can be expected overall.

[0046] The present invention is not limited to the above embodiment, and various modifications are possible within the scope of the gist 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 according to the air volume of the fan 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 part where the air volume from the fan is weak, the heat dissipation fin 7a with a relatively small air resistance is arranged in the part where the air volume is strong, and the heat dissipation fin 7b is arranged in the part where the air volume is medium, thereby achieving a good balance between the cooling efficiency of the heat sink 2 and noise countermeasures. [Explanation of symbols]

[0047] 1 Cooling module 2 Heat sink 3 Fan (air blowing means) 6 Heat dissipation part 7a First heat dissipation fin 7b Second heat dissipation fin 7c Third heat sink 8a, 8b, 8c Main body 10a, 10b, 10c Upper part 12a, 12b, 12c Fin end 14a, 14b, 14c Ventilation holes 17 First fin unit 17 18 Second fin unit 18 α First acute angle β Second acute angle γ right angle

Claims

1. 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.

2. 2 . The cooling module according to claim 1 , wherein the plurality of heat dissipating fins include a third heat dissipating fin, the upper side portion of which forms a right angle with the end of the fin.

3. 3. The cooling module according to claim 2, wherein both ends of the heat dissipation portion are the third heat dissipation fins.

4. 4. The cooling module according to claim 2, wherein the heat dissipation portion has a first fin unit in which the first heat dissipation fins and the third heat dissipation fins are alternately arranged in parallel.

5. 5. The cooling module according to claim 1, wherein the main body portion is formed with a vent hole.

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