KR20090078932A - Cooling module - Google Patents

Abstract

A cooling module is provided to improve cooling efficiency and facilitate production. A fan(210) generates an air current. An air current adjusting member(250) increases the speed of the air current. In a heat-sinking member(230), a collision part is formed. In the collision part, the air current collides. A plurality of heat radiation pins(235) is installed at the neighboring of the collision part of the heat-sinking member. In the air current adjusting member, an inlet(251) in which the air current is flowed and an outlet(252) in which the air current is discharged are formed. The area of the inlet is broader than the area of the outlet.

Description

Cooling Module

The present invention relates to a cooling module for cooling the heating element.

Among the various electronic devices used in electronic products, there is a heating element that generates heat during operation. In particular, heat generating elements such as computer CPUs or image processing processors generate a lot of heat during operation. Such heat degrades or degrades the heat generating element itself and other electronic elements around the heat generating element, and may shorten the life of the electronic element or cause a failure. Therefore, there is a need for a method of cooling heat generated in the heating element, that is, a method of rapidly moving the heat generated in the heating element to the outside of the electronic product so that heat does not accumulate inside the electronic product.

Currently, a method of cooling a heat generating element by contacting a heat radiating member, a heat pipe, or the like with a heat generating element is widely used. In addition, a method of increasing a cooling effect by installing a fan in a heat radiating member, a heat pipe, or the like, in a heat generating element that generates a large amount of heat is used.

1 shows a cooling module according to the prior art.

Referring to FIG. 1, the cooling module 100 according to the related art has a heat dissipation member 130 in which one surface of the cooling module 100 is in contact with a heat generating element (not shown), and conducts heat generated from the heat generating element (not shown). A plurality of heat dissipation fins 135 for dissipating heat conducted to the heat dissipation member 130 into the surrounding air, and a fan 110 for flowing the ambient air between the plurality of heat dissipation fins 135.

In the cooling module 100 having the configuration as described above, the flow of air generated in the fan 110 passes through the space between the plurality of heat dissipation fins 135 to absorb heat conducted from the heat generating element to the heat dissipation fins 135. Move. However, since no passage is formed in the central portion of the heat dissipation member 130 of the cooling module 100 as in the prior art, the air introduced earlier may prevent the introduction of new air. In particular, when the air introduced over the heat dissipation member 130 does not discharge to the outside and forms a vortex, the performance of the cooling module 100 may be degraded.

In addition, in the cooling module of the related art, since the heating element (not shown) may not be sufficiently cooled when the vertical thickness of the cooling module 100 is thin, the thickness of the heat dissipation member 130 is increased. However, the cooling module 100 including the heat dissipation member thickly formed as described above has been difficult to be applied to a product that is configured with small components such as a notebook computer. In addition, there is a disadvantage in that the weight of the cooling module 100 including the heat dissipation member thickly formed is increased.

The present invention provides a cooling module that can be manufactured in a small size, high cooling efficiency, simple structure and easy to manufacture.

According to an aspect of the present invention, there is provided a cooling module including a fan for generating airflow, an airflow control member for increasing the speed of the airflow, and a heat dissipation member including a collision part to collide with the increased airflow.

A plurality of heat dissipation fins may be installed around the collision part of the heat dissipation member. The airflow control member is formed with an inlet port through which air flows and an outlet port through which air flows are formed, respectively, and the area of the inlet port is wider than that of the outlet port. The airflow regulating member may be formed in a funnel shape. The heat dissipation fins may be installed radially from the impact portion. An uneven portion may be formed on the surface of the heat dissipation fin. The heat dissipation fins may be formed in a streamlined cross section. Increased velocity of airflow can impinge on the impingement in a vertical direction. Concave-convex portion may be formed in the impact portion.

According to another aspect of the present invention, a fan for generating the air flow, a duct provided with a plurality of air flow control unit for receiving and transporting the air flow to increase the speed of the conveyed air flow is ejected to the outside, and a plurality of air flow control unit Each of the plurality of heat dissipating members may be installed adjacent to each other, and the plurality of heat dissipating members may be formed with a collision part to collide with the air flow is increased the speed of the ejected from the plurality of air flow control unit, respectively.

The plurality of airflow control unit may be integrally formed with the duct. The sum of the areas of the outlets respectively formed in the plurality of airflow control units is smaller than the area of the inlet port through which air flows into the duct. Each of the plurality of airflow regulators may have a shape in which a cross-sectional area is reduced in a direction in which airflow is ejected.

The cooling module according to the present invention can be applied to a heating element that generates a large amount of heat with high cooling efficiency, and can be compact and light in weight, and its structure is simple and easy to manufacture, thereby saving cost and time required for production and mass production. This is easy.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 to 4 respectively show an exploded perspective view of the cooling module according to the first embodiment of the present invention, a partial cross-sectional view of the cooling module according to the first embodiment of the present invention, and heat dissipation of the cooling module according to the first embodiment of the present invention. A plan view of the member is shown. This will be described with reference to FIGS. 2 to 4.

The cooling module 200 according to the first embodiment of the present invention is largely composed of a fan 210, an air flow regulating member 250, and a heat dissipation member 230.

The fan 210 is a member for generating airflow. An impeller is built in the fan 210, and when electric power is supplied to an electric motor (not shown), the impeller rotates to generate airflow toward one side of the fan 210. A plurality of protrusions 213 are formed at the outer circumference of the fan 210, and each protrusion 213 is formed with a through hole 218 for fixing the fan 210 to another member. Since the configuration and operation of the fan 210 are well known to those skilled in the art, a detailed description of the fan 210 itself will be omitted.

In the cooling module 200 according to the first embodiment of the present invention, as the fan 210 is driven, the airflow control member 250 for increasing the speed of the airflow is formed in front of the fan 210 where the airflow is formed. Is located. Airflow control member 250 for increasing the speed of the airflow has a funnel-shaped guide surface 253, the inlet 251 and the outlet 252 is formed on both sides of the guide surface 253. At this time, the area of the inlet 251 is formed to be wider than the area of the outlet 252. The induction surface 253 between the inlet 251 and the outlet 252 may be formed such that the vertical cross section shows a straight line as shown in FIG. 2, or may be formed to show a curved line as necessary.

On the other hand, a portion of the guide surface 253 is formed with a frame 254 for coupling the air flow control member 250 and the fan 210, the heat radiation to the air flow control member 250 at the edge of the frame 254 A plurality of supports 255 are formed to support the members 230. Fixed ends 256 protrude from end portions of the plurality of supports 255. The airflow control member 250, the frame 254 and the support 255 may be manufactured integrally, or may be combined separately after being separately manufactured. At this time, if the air flow control member 250, the frame 254 and the support 255 is integrally formed using an injection method or the like, it is possible to save the cost and time required for the production and advantageous for mass production.

In the frame 254, a number of through holes 258 corresponding to the through holes 218 formed in the fan 210 are formed at corresponding positions. A plurality of fixing members (not shown) pass through the through hole 218 and are fixed to the through hole 258 to couple the fan 210 and the frame 254. At this time, the fan 210 and the frame 254 should be coupled such that the air flow generated from the fan 210 flows into the inlet 251 of the airflow control member 250 and is ejected to the outlet 252. The air flow from the fan 210 is preferably formed so that the air flow does not escape between the fan 210 and the frame 254 so that the air flow from the fan 210 can pass through the air flow control member 250 through the inlet 251. Inlet 251 may have a somewhat larger area than the cross-sectional area of the air flow generated by the fan 210 so that the entire air flow generated from the fan 210 can be introduced.

The heat dissipation member 230 is installed below the blower outlet 252 of the airflow control member 250 to conduct heat from the heat generating element. One surface of the heat dissipation member 230 is formed of a contact surface 233 thermally connected to the heat generating element so that heat of the heat generating element can be conducted. At this time, as a material of the heat dissipation member 230, a good conductor of heat such as aluminum, copper, gold or silver may be used. For reference, since the portion where the contact surface 233 is in contact with the heat generating element (not shown) may not be in close contact, the TIM is disposed between the contact surface 233 and the heat generating element (not shown) to improve heat transfer efficiency. (thermal interface material) may be interposed. Since TIM is well known to those skilled in the art, a detailed description thereof will be omitted.

The other surface of the heat dissipation member 230 is provided with a plurality of heat dissipation fins 235. Each of the plurality of heat dissipation fins 235 installed in the heat dissipation member 230 of the cooling module 200 according to the first embodiment of the present invention has a rectangular parallelepiped shape having a rectangular cross section. At this time, the heat dissipation fin 235 may be manufactured separately and installed on the heat dissipation member 230, or may be integrally formed with the heat dissipation member 230. By the way, since the heat transfer from the heat radiating member 230 to the heat radiating fin 235 should be easy, it is preferable that the heat radiating fin 235 is formed integrally with the heat radiating member 230. In addition, as described above, since the heat conductor used as the material of the heat dissipation member 230 is mainly a metal, when the heat dissipation member 230 is manufactured, forming the heat dissipation fins 235 together by cutting, casting, or the like is produced. This saves time and money, and is advantageous for mass production.

At the edge of the heat dissipation member 230, the same number of through holes 238 as the plurality of fixed ends 256 are formed at positions corresponding to each other. The fixing end 256 penetrates the through hole 238 corresponding to each position, and the fixing member 259 is coupled to the fixing end 256 protruding after passing through the through hole 238 to support the support 255. It is coupled to the heat dissipation member 230. Various methods may be used to couple the fixed end 256 and the fixing member 259. For example, a screw thread is formed on the outer periphery of the fixed end 256, and the fastening member 259 is fastened to the fixed end 256 using a nut as the fixing member 259 or the fixed end 256 and the fixing member. A method of bonding 259 with an adhesive or the like can be used.

As described above, the cooling module 200 according to the first embodiment of the present invention installs the airflow control member 250 having a funnel shape on the heat dissipation member 230 having the heat dissipation fins 235, and the air flow control member 250. It can be assembled simply by coupling the fan 210 on the). In particular, the fan 210 can be used in place of what is currently widely used.

On the other hand, when the support 255 is coupled to the heat dissipation member 230, the jet port 252 of the airflow control member 250 is adjacent to the heat dissipation member 230. In the cooling module 200 according to the present invention, a collision part 237 formed in the heat dissipation member 230 is positioned directly below the spout 252 of the heat dissipation member 230 through which air flow formed from the fan is ejected. At this time, the heat dissipation fin 235 is not installed in the collision part 237 in which the airflow hits the heat dissipation member 230 directly from the jet port 252. The plurality of heat dissipation fins 235 are formed to be positioned at the periphery of the collision part 237.

The operation and detailed structure of the cooling module 200 having the structure as described above will be described.

Air flow generated from the fan 210 flows into the inlet 251 of the airflow control member 250 and is ejected to the outlet 252. At this time, since the area of the inlet 251 is larger than the outlet 252 as described above, the cross-sectional area through which the airflow flows is narrowed, so that the speed of the airflow is increased. The increased speed of the air flows from the blower outlet 252 in the direction of the arrow vertically downward in FIG. 3 to impinge vertically on the impact portion 237 of the heat dissipation member 230. The impingement part 237 is a plane perpendicular | vertical to the direction ejected from the ejection opening 252. FIG. The airflow collided perpendicularly to the impingement part 237 is moved to the outside of the heat dissipation member in the lateral direction (the direction of the arrow in the transverse direction as seen in FIG. 3) around the impingement part 237 and falls out of the cooling module 200. I'm going.

On the other hand, the heat dissipation fin 235 is not installed in the impact portion 237 adjacent to the jet port 252, so as not to interfere with the flow of the air flow toward the impact portion 237. Since the airflow blown out from the jet port 252 may be somewhat dispersed when it reaches the collision part 237, the impingement part 237 has an imaginary circle (not shown) which makes d the diameter of the jet port 252 a diameter. The heat dissipation fin 235 is not installed at the same or somewhat wider portion than that.

In addition, if the distance g between the jet 252 and the impact portion 237 is too far, the air flow is dispersed before reaching the impact portion 237 or the velocity of the air flow is reduced, and if g is too close, the air flow is the impact portion. After colliding with 237, it may not flow along the surface of the heat dissipation member 230 and may be reflected and scattered from the colliding part 237. At this time, the distance of g can be obtained through experiments to obtain an optimal value to maximize the heat radiation effect.

In the cooling module 200 according to the first embodiment of the present invention, the airflow passing through the airflow control member 250 is increased in speed as compared with the airflow immediately after exiting the fan 210 as described above. In addition, the airflow in which the speed is increased is intensively ejected through the ejection opening 252 of the airflow control member 250, and the airflow intensively ejected through the ejection opening 252 is the impingement portion 237 of the heat dissipation member 230. Will crash vertically. Thus, a method of cooling a high speed air stream by impacting it at a local high temperature region is called an impinging-jet. In order to achieve the cooling effect of the collision jet, the speed of the airflow must be fast enough, and in order to obtain such a fast airflow, the diameter (D) or the area (D) of the inlet port 251 of the airflow control member 250 and the diameter (d) of the jet port 252 (d). Of course, the ratio between the area and the distance (g) between the inlet 251 and the outlet 252 can be adjusted. That is, in the cooling module 200 according to the first embodiment of the present invention, the diameter D of the inlet 251, the diameter d of the outlet 252, and the distance between the inlet 251 and the outlet 252 ( L), the gap g between the blower port 252 and the collision part 237 is set as variables, and the optimal specification can be determined by measuring the heat dissipation performance of the cooling module 200 while changing each variable.

Heat conducted from the heat generating element (not shown) to the impingement portion 237 and the heat dissipation fin 235 through the contact surface 233 flows between the air flow impinging on the impingement portion 237 and the plurality of heat dissipation fins 235 after the impact. Is quickly released to cool the heating element (not shown). The airflow blown out from the jet port 252 and impinged on the impingement part 237 in the vertical direction is distributed in almost all directions along the surface of the heat radiating member 230 as indicated by arrows in FIG. 4 and flows between the heat radiating fins 235. . At this time, the airflow distributed along the surface of the heat dissipation member 230 passes through the heat dissipation fins 235 in the lateral direction to dissipate heat from the heat dissipation fins 235. In addition, since the airflow discharged to the outside may spread in the lateral direction of the heat dissipation member 230, other heating elements (not shown) around the heat dissipation member 230 may be cooled together.

At this time, if a large resistance is applied to the airflow, air that has not escaped between the radiating fins 235 may be prevented from introducing the airflow continuously generated by the fan 210, thereby lowering cooling performance. Therefore, the heat dissipation fins 235 may be formed to be quickly discharged to the outside of the heat dissipation member 230 after passing through the heat dissipation fins 235 after the airflow spouted at high speed hit the collision unit 237.

On the other hand, the cooling module 200 according to the first embodiment of the present invention, although the impact portion 237 is formed so as to be located in the center of the heat dissipation member 230, the heating element (not shown) in contact with the contact surface 233 The impingement portion 237 may be formed at the highest temperature portion of the heat dissipation member 230 in which the temperature is increased by the heat conducted from the heat dissipation member 230. That is, the impingement part 237 may be formed at a portion other than the center of the heat dissipation member 230.

5 is a modification of the heat radiation fin of the cooling module according to the first embodiment of the present invention. It demonstrates with reference to FIG.

In FIG. 4, the high speed airflow impinging on the colliding part 237 becomes wider as it is farther from the colliding part 237, and the resistance of the air flow is applied by the plurality of heat dissipation fins 235. The speed of the airflow gradually decreases. As the speed of the airflow is reduced in this way, the heat dissipation effect of the edge portion of the heat dissipation member 230 may be reduced than the impact portion 237.

Therefore, the heat dissipation fin 235 installed at the edge of the heat dissipation member 230 may increase the heat dissipation effect by increasing the area in which the heat dissipation fin 235 is in contact with the air stream within a range that does not prevent the flow of the air stream. As such, for example, the surface area of the heat dissipation fin 235 may be increased by increasing the area in which the heat dissipation fin 235 is in contact with the airflow.

For example, a method of increasing the surface area of the heat dissipation fin 235 may include forming an uneven portion such as a plurality of protrusions 236 or a groove (not shown) on the surface of the heat dissipation fin 235. Alternatively, the surface of the heat dissipation fins 235 may be ground, or sand blast may be used to form fine uneven portions (not shown) on the surface.

6 is a view showing a modification of the heat dissipation member of the cooling module according to the first embodiment of the present invention.

Since the heat dissipation member 330, the contact surface 333, and the through hole 338 correspond to the heat dissipation member 230, the contact surface 233, and the through hole 238 of the cooling module 200 according to the first embodiment of the present invention, Detailed description will be omitted.

One surface of the heat radiation member 330 is formed or installed a plurality of heat radiation fins 335 having a cylindrical shape. The heat dissipation fin 335 is not formed or installed in the collision part (not shown). As described above, since the heat radiation effect is lowered when the airflow is disturbed by the heat radiation fins 335, the heat radiation fins 335 should have a low resistance to airflow. Therefore, if the heat radiation fin 335 is formed in a cylindrical shape, less vortex is generated when the airflow flows laterally between the heat radiation fins 335. Therefore, the introduction of new airflow is facilitated, and the effective contact area in which heat exchange occurs between the heat dissipation fin 335 and the airflow is increased, so that the heat dissipation effect can be increased.

7 shows another modification of the heat dissipation member of the cooling module according to the first embodiment of the present invention.

Since the heat dissipation member 430 and the through hole 438 correspond to the heat dissipation member 230 and the through hole 238 of the cooling module 200 according to the first embodiment of the present invention, a detailed description thereof will be omitted.

A plurality of heat dissipation fins 435 are radially installed on one surface of the heat dissipation member 430. As described above, the heat dissipation fin 335 is not installed or formed in the impact portion (not shown), but is radially installed or formed toward the edge of the heat dissipation member 430 around the impact portion (not shown). .

Therefore, the high-speed airflow impinging on the impingement portion (not shown) of the heat dissipation member 430 coincides with the direction in which the radiation is radiated radially and the direction of the heat dissipation fin 335, so that the airflow receives less resistance of the heat dissipation fin 335. Air flow can be smoother. Therefore, it is easy to apply when the heat generating element (not shown) is large or the heat generation amount is very large, or the shape of the heat generating element (not shown) is circular, and the horizontal shape of the heat dissipation member 430 is circular. Do.

Although not shown, when the airflow fin has a shape that obstructs the flow of airflow at a high speed, a flow separation phenomenon may occur near the heat radiation fin. The flow peeling phenomenon may cause noise and generate a vortex, thereby lowering the flow of airflow, and thus, a heat radiation effect may be reduced. At this time, when the airflow is a high speed to form a cross-sectional shape of the heat radiation fin in a streamlined or thin plate shape to minimize the resistance to the airflow can be reduced the flow peeling phenomenon. Since the surface roughness of the heat sink fins also affects the resistance to airflow, a low surface roughness of the heat sink fins can reduce the flow peeling phenomenon.

8 shows a part of a cooling module according to a second embodiment of the present invention.

The heat dissipation member 630 includes a contact surface 633 and a collision part 637, and the airflow control member 650 includes an inlet 651, a jet port 652, and an induction surface 653. Here, since the airflow control member 650 corresponds to the airflow control member 250 of the cooling module 200 according to the second embodiment of the present invention described above, the inlet 651, the outlet 652 and the guide surface 653 ) Will be omitted. In addition, the fan not shown is the same as described in the first embodiment of the present invention, and thus detailed description thereof will be omitted.

As indicated by the arrow, the airflow ejected from the jet port 652 is dispersed along the surface of the heat dissipation member 630 after colliding with the impact unit 637. The heat dissipation member 630 according to the second embodiment of the present invention maximizes the heat dissipation effect due to the collision jet, and unlike the first embodiment of the present invention, a heat dissipation fin is not formed or installed on one surface of the heat dissipation member 630. . The heat dissipation member 630 may be applied when the heat generating element (not shown) is small or when the area of a portion where heat is generated in the heat generating element (not shown) is narrow. In addition, since the velocity of the air stream to be dispersed is relatively faster than that of the heat radiating fin, the effect of cooling the other heat generating elements (not shown) provided around the heat generating element (not shown) is also increased.

Instead of forming or installing a heat radiating fin on the heat radiating member 630, an uneven portion is formed on one surface of the heat radiating member 630 on which the collision part 637 is formed to increase the contact area with the airflow, thereby increasing the heat radiating member 630. Can be increased. The uneven portion is formed slightly fine enough to allow the airflow to flow smoothly. As a method of forming a fine uneven | corrugated part, methods, such as a press work and a sand blast, can be used.

9 shows a cooling module according to a third embodiment of the present invention.

The cooling module 700 includes a duct 750, a first heat dissipation member 753, and a second heat dissipation member 793. The inlet 751 is formed at one side of the duct 750, and a fan 710 is installed inside the duct 750. The fan 710 generates airflow such that air is supplied into the duct 750 through the inlet 751. The duct 750 is provided with a first airflow control unit 753 and a second airflow control unit 793. Blowing ports 752 and 792 are formed in the first airflow control unit 753 and the second airflow control unit 793, respectively.

The first heating element 10 and the second heating element 20 mounted on the circuit board 30 may have different heights and widths, and the amount of heat generated may also vary. In addition, the heating elements 10 and 20 may not be connected in a straight line by another component (not shown) inside the electronic device (not shown) in which the circuit board 30 is installed. In the case of a bent shape connected to a flexible substrate (not shown) or the like, the heating elements 10 and 20 may not be positioned on the same plane. In this case, the curved portion 759 is formed in a portion of the duct 750 to form the duct 750 to be adjacent to the heating elements 10 and 20, and the heating elements of the duct 750. Air flow regulators 753 and 793 are formed at portions corresponding to the positions of the positions 10 and 20, respectively.

The first heat generating element 10 is an example in which the height from the circuit board 30 is low or the area where heat is generated is narrow, and the second heat generating element 20 is high in height or heat is generated. For example, the area of the site is large. The first heat dissipation member 730 is installed in the first heat generating element 10, and the second heat dissipation member 770 is installed in the second heat generating element 20. In this case, the first heat dissipation member 730 corresponds to the heat dissipation member 630 of the second embodiment of the present invention described above, and the second heat dissipation member 770 corresponds to the heat dissipation member 770 of the first embodiment of the present invention. do. Therefore, detailed descriptions of the first heat dissipation member 730 and the second heat dissipation member 770 will be omitted.

In order to optimize the heat dissipation effect of the cooling module 700, as described above, the separation distance between the spout 752 and the first heat dissipation member 730, the separation distance between the spout 792 and the second heat dissipation member 770. Should be set appropriately. The optimal separation distance may be obtained through experiments, and may be adjusted to have an optimal separation distance using the shape of the curved portion 759. As described above, the curved portion 759 may be used when the duct 750 cannot connect the plurality of heating elements 10 and 20 in a straight line, or when the heights of the heating elements 10 and 20 are different from each other. The curved portion 759 may be formed in a gentle curved shape so that the air flow introduced into the duct 750 through the inlet 751 by the fan 710 may maintain a laminar flow state. In addition, although not shown, the duct 750 may be branched as necessary. In this case, the duct 750 may have a gentle curved shape.

The airflow control units 753 and 793 may have different shapes depending on the characteristics of the heating elements 10 and 20. The second airflow control unit 793 has a funnel shape as described in the first embodiment of the present invention, and has a sufficient speed when the area of the impact portion (not shown) of the second heat dissipation member 770 is rather large. Used to get airflow. The first airflow control unit 753 may be used when the area (not shown) of the collision part of the first heat dissipation member 730 is small as described in the second embodiment of the present invention. The first airflow control unit 753 has a tubular shape protruding from a portion of the duct 750 so that the airflow ejected from the jet port 752 can be ejected in a laminar flow state.

The airflow control units 753 and 793 may be integrally formed with the duct 750 or may be separately manufactured and installed in the duct 750. When manufactured separately and installed in the duct 750, the connection portion between the duct 750 and the airflow control units 753 and 793 is smooth so as not to reduce the speed of the airflow or to form a vortex. In addition, the sum of the areas of the outlets 752 and 792 should be smaller than the area of the inlet 751.

On the other hand, a plurality of heat generating elements (not shown) are used in one electronic device (not shown) due to high performance of a computer, large-scale and high speed communication equipment such as an ISDN exchanger, and the like. Not shown) is a trend toward integration and miniaturization. When the cooling module 700 according to the third embodiment of the present invention is used for a heating element (not shown) of such an electronic device (not shown), air flow is discharged to the periphery of the cooling module 700 as described above. Can be. Therefore, the surrounding heating element (not shown) can also be cooled, and since the flow of air is generated inside the electronic device (not shown), it is possible to lower the overall temperature inside the electronic device (not shown).

In particular, the use of a central processing unit having a plurality of cores (core) is increasingly used in personal computers. Therefore, the heating unit of the central processing unit requiring cooling may be several places. In this case, a plurality of jets of the airflow control member may be formed to correspond to the number and positions of the parts requiring cooling, and a plurality of collision parts corresponding to the number and positions of the jets may be formed on the heat radiating member. However, a fan should be used to allow a sufficient amount of air to flow into the duct so that the speed of the air stream ejected from the spout is not lowered.

10 to 11 show simulation results for obtaining an optimum diameter of the jet port of the cooling module according to the first embodiment of the present invention. This will be described with reference to FIGS. 2 to 4.

10 is a diameter (Nozzle diameter [mm]) of the jet port 252 in the cooling module 200 according to the first embodiment of the present invention by changing from 15mm to 30mm in 5mm intervals, the heat radiation member 230 in each case This graph shows the change in thermal resistance (K / W) of. The horizontal axis represents the diameter of the jet port 252, the vertical axis represents the thermal resistance of the heat radiation member 230.

It can be seen that the heat resistance of the heat dissipation member 230 is the largest when the diameter of the jet port 252 is 15 mm, and the smallest when the diameter of the heat dissipation member 252 is 25 mm. The smaller the thermal resistance of the heat dissipation member 230 is, the greater the heat dissipation effect is, so that the diameter of the jet port 252 when the thermal resistance of the heat dissipation member 230 is minimum is an optimal value. Therefore, when the diameter of the blower outlet 252 is subdivided and changed at small intervals, and the heat resistance of the heat radiation member 230 is measured in each case, the optimum value of the blower outlet 252, that is, the heat radiation effect of the cooling module 200 is best The diameter of the blower outlet 252 which can be enlarged can be calculated | required.

FIG. 11 changes the diameter (Nozzle diameter [mm]) of the jet port 252 in 5 mm intervals from 15 mm to 30 mm in the cooling module 200 according to the first embodiment of the present invention. Graph of temperature). The horizontal axis represents the diameter of the jet port 252, the vertical axis represents the temperature of the heating element (not shown).

It can be seen that the temperature of the heating element (not shown) is the highest when the diameter of the jet port 252 is 15 mm and the lowest when it is 25 mm. Since the lower the temperature of the heat generating element (not shown), the greater the heat dissipation effect of the cooling module 200, so that the diameter of the blower outlet 252 when the temperature of the heat generating element (not shown) is the minimum is the optimal value. Therefore, when the diameter of the blower outlet 252 is subdivided and changed at small intervals, and the temperature of the heating element (not shown) is measured in each case, the optimum value of the blower outlet 252, that is, the heat radiation effect of the cooling module 200, is determined. The diameter of the blower outlet 252 which can be made largest can be calculated | required.

The above-described simulation can be applied not only to the cooling module 200 according to the first embodiment of the present invention but also to all the cooling modules according to the present invention to obtain an optimum diameter of the jet port.

12 shows simulation results for obtaining an optimum value of the ejection opening of the cooling module according to the first embodiment. This will be described with reference to FIGS. 2 to 4.

12 illustrates a plurality of grooves (not shown) formed on the surface of the collision part 237 of the cooling module 200 according to the first embodiment of the present invention (Rough1), and a plurality of protrusions (not shown). Is divided into three cases (Rough2) and smooth surface (Smooth), and in each case, the thickness of the heat dissipation fin 235 having a square cross section (that is, the length of two sides of the square cross section) is 1 mm, 2 mm, and It is a graph which shows the temperature of the heat generating element (not shown) when it sets to 3 mm. For reference, a plurality of protrusions (not shown) or a plurality of grooves (not shown) to form a height or depth of about 1mm so as not to generate a lot of vortex.

In the case of Rough1, Rough2 and Smooth, the temperature when the width of the heat radiation fin 235 is 1mm is the lowest, and the temperature when the 2mm is the highest. Therefore, when the 1mm of the three thickness of the heat radiation fin 235, the heat dissipation effect of the heat dissipation module 200 was obtained the best.

Comparing the results according to the surface state of the collision part 237 when the thickness of the heat radiation fin 235 is the same as follows. When the thickness of the heat radiation fin 235 is 1mm, when the surface of the collision part 237 is smooth, the temperature of the heating element (not shown) is the lowest, and when the plurality of protrusions (not shown) are formed, the temperature is the highest. The result was obtained. When the thickness of the heat radiation fin 235 is 2mm, when a plurality of grooves (not shown) are formed on the surface of the collision part 237, the temperature of the heating element (not shown) is the lowest, and a plurality of protrusions (not shown) The highest temperature was obtained in the case where) was formed. When the thickness of the heat sink fin 235 was 3 mm, the same tendency was obtained as when the thickness of the heat sink fin 235 was 2 mm.

Therefore, the thicker the heat dissipation fin 235, the more turbulence is generated, the heat dissipation effect of the cooling module 200 was obtained. Forming grooves (not shown) or protrusions (not shown) in the surface state of the impact portion 237 does not significantly affect the heat dissipation effect, but when the thickness of the heat radiation fin 235 is thick, the impact portion 237 The heat dissipation performance was lower than that of the smooth surface.

Experimental results described above are obtained through simulation, and may be slightly different from the actual experiments, but the heat dissipation effect of the cooling module 200 depends on the dimensions of the respective components of the heat dissipation member 230 and the airflow control member 250. It can be seen that it can vary greatly, and that the dimensions of each component are organically affected. Therefore, as in the above-described simulation, by measuring and comparing the heat dissipation effect while actually changing the dimensions of each component, it can be seen that optimal dimensions with the highest heat dissipation effect can be obtained.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below It will be appreciated that modifications and variations can be made.

1 is an exploded perspective view of a cooling module according to the prior art.

2 is an exploded perspective view of a cooling module according to a first embodiment of the present invention.

3 is a partial cross-sectional view of a cooling module according to a first embodiment of the present invention.

4 is a plan view of a heat radiation member of the cooling module according to the first embodiment of the present invention.

5 is a perspective view showing one modification of the heat radiation fin of the cooling module according to the first embodiment of the present invention.

Figure 6 is a perspective view showing a modification of the heat radiation member of the cooling module according to the first embodiment of the present invention.

7 is a perspective view showing another modification of the heat dissipation member of the cooling module according to the first embodiment of the present invention.

8 is a partial cross-sectional view of a cooling module according to a second embodiment of the present invention.

9 is a cross-sectional view of a cooling module according to a third embodiment of the present invention.

10 to 12 are graphs showing the results of simulating the heat radiation effect of the cooling module according to the present invention.

<Description of the symbols for the main parts of the drawings>

210: fan 230: heat dissipation member

233: contact surface 235: heat radiation fin

250: airflow control member 251: inlet

252: spout 255: support

710: fan 730: first heat dissipation member

750: Duct 751: Inlet

752: outlet 753: air flow control unit

759: curved portion 770: second heat radiation member

792: blower outlet 793: air flow control unit

Claims (18)

A fan for generating airflow; An airflow control member for increasing the speed of the airflow; And a heat dissipation member having a collision portion in which the air flow having the increased speed is collided. The method of claim 1, Cooling module that is provided with a plurality of heat radiation fins around the impact portion of the heat radiation member. The method of claim 1, The airflow control member is formed with an inlet port through which the airflow flows, and a blowout port through which the airflow is ejected, respectively, and the cooling module, characterized in that the area of the inlet is wider than the area of the outlet. The method of claim 1, The airflow control member is a cooling module, characterized in that the funnel shape. The method of claim 2, Cooling module, characterized in that the heat radiation fin is installed radially from the impact portion. The method of claim 2, Cooling module, characterized in that the concave-convex portion is formed on the surface of the radiating fin. The method of claim 2, The heat dissipation fin is a cooling module, characterized in that the cross section is streamlined. The method of claim 1, Cooling module, characterized in that the increased air flow impinges on the impact portion in a vertical direction. The method of claim 1, Cooling module, characterized in that the bump is formed with an uneven portion. A fan for generating airflow; A duct including a plurality of airflow control units configured to receive the airflow and to convey the airflow, and to increase the speed of the transferred airflow and blow out to the outside; Cooling module, characterized in that it comprises a plurality of heat dissipation member is formed a collision portion that collides with the air flow ejected from the plurality of air flow control unit. The method of claim 10, Cooling module having a plurality of heat radiation fins are respectively installed around the impact portion of the plurality of heat radiation members. The method of claim 10, Cooling module, characterized in that the sum of the areas of the outlets respectively formed in the plurality of airflow control unit is smaller than the area of the inlet port in which the airflow flows into the duct. The method of claim 10, The plurality of airflow control unit is characterized in that the cross-sectional area is reduced in the direction in which the air flow is ejected, respectively. The method of claim 11, Cooling module, characterized in that the heat radiation fin is installed radially from the impact portion. The method of claim 11, Cooling module, characterized in that the concave-convex portion is formed on the surface of the radiating fin. The method of claim 11, The heat dissipation fin is a cooling module, characterized in that the cross section is streamlined. The method of claim 11, Cooling module, characterized in that the increased air flow impinges on the impact portion in a vertical direction. The method of claim 10, Cooling module, characterized in that the bump is formed with an uneven portion.

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