JP2007281213A - Heat sink module and cooling apparatus having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat sink module which can be used for a cooling apparatus of a liquid cooling type utilizing the circulation of a liquid coolant, and can be made thin in thickness and also increase a heat radiating performance. <P>SOLUTION: The heat sink module of a coolant circulation type comprises a blower 2 having a centrifuging blower fan 5 accommodated therein, a heat radiator 6 made up of a plurality of fins 6a adjacent to the blower 2, and a liquid coolant circulation passage 7 passed through the fins 6a of the heat radiator 6. When the fins 6a of the heat radiator 6 are arranged so as to suppress the disturbance of an air flow sent from the blower fan 5, a thin heat sink module having an efficient and stable heat radiating performance can be attained. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is directed to forcibly cooling various heat-generating electronic components such as an ultra-compact arithmetic processing unit (hereinafter referred to as MPU), a chip set, a display controller, or an HDD disposed inside a casing of an electronic device. The present invention relates to a heat radiation module used in a natural circulation liquid cooling method using a heat pipe or a forced circulation liquid cooling method for forcibly circulating a liquid refrigerant using a pump, and a cooling device including the same. .

  Recently, the speed of data processing in computers has been increasing rapidly, the clock frequency of the MPU has become much higher than before, and the amount of heat generated by the MPU has also increased significantly.

  In addition to the MPU, the performance of various related electronic components such as chipsets, display controllers, and HDDs is also required as the clock frequency increases to improve the performance of computer display devices and memory access performance. The amount of heat generated by each electronic component is increasing. Therefore, the necessity for cooling these electronic devices is increasing more and more.

  As countermeasures against heat generation of electronic components, a heat sink having fins is brought into contact with a heating element to naturally dissipate heat, a method in which the heat sink is directly cooled by a fan, or a heat pipe between the heat receiving portion and the heat radiating portion is thermally connected. A method of constructing a heat sink module and forcibly cooling the heat dissipating part by blowing air from a fan has been adopted.

  However, in recent years, with the increase in the processing speed of semiconductor integrated circuits, the increase in processing capacity, the speeding up of image processing, etc., the circulation of liquid refrigerant, which has been used in the field of large-sized computers in the past, has been achieved. Efficient and quiet cooling devices have also been installed in electronic devices such as desktop PCs and PC servers that are relatively portable.

  The liquid cooling type cooling device performs efficient heat exchange with a liquid refrigerant having high thermal conductivity in each of the heat receiving part and the heat radiating part, and simultaneously forcibly drives the liquid refrigerant to circulate using a pump. Heat is transported in the direction from the heat receiving portion to the heat radiating portion, and the heat of the heat generating electronic components is efficiently radiated to the outside by blowing air with a fan.

  In recent years, liquid cooling type cooling devices are required to be further improved in capacity and reduced in size and weight as they are mounted on various electronic devices.

  Therefore, especially as a heat dissipation module for a cooling device that dissipates heat generated from heat-generating electronic components mounted on lightweight and thin electronic devices such as notebook computers, a blower unit with a centrifugal fan installed in the fan housing A heat radiation module is known which is composed of a heat radiation portion disposed in a U shape on the outer periphery of the air blowing portion.

  FIG. 11 is an overall perspective view of a conventional heat dissipation module, and is connected between a pump (not shown) for circulating a liquid refrigerant in a cooling device and a reserve tank (not shown) in which the liquid refrigerant is stored. The heat dissipation module is shown.

  The heat dissipation module includes a pipe 51 for circulating a liquid refrigerant between the reserve tank and the pump, a radiator 52 arranged in parallel so as to pierce the pipe 51 with a plurality of plate-like fins 52A, A blower 53 that sends air to the duct 51 and the radiator 52 is provided.

  As the liquid refrigerant, for example, an antifreeze liquid made of an aqueous solution in which propylene glycol and a rust preventive agent are mixed with water is used.

  The blower unit 53 includes a fan casing 56 that is a substantially rectangular outer member having an upper surface 54, a lower surface (not shown), and four side surfaces 55, and a plurality of blades housed inside the fan casing 56. And a centrifugal blower fan 57 having 57A.

  The upper surface 54 and the lower surface 55 of the fan housing 56 facing the rotation shaft 57B of the blower fan 57 are provided with intake holes 58 for taking air into the fan housing 56, respectively. Out of the four side surfaces 55 of the housing 56, at least three side surfaces 55 are provided with exhaust holes 59 for discharging the air from the blower fan 57 to the outside of the fan housing 55.

  The blower fan 57 has a shape that takes in air from a direction along the rotation shaft 57B and discharges air in a radial direction orthogonal to the rotation shaft 57B.

  The aforementioned fin 52A is made of a plurality of metal plate members having high thermal conductivity. A radiator 52 having fins 52 </ b> A arranged at appropriate intervals is provided on three side surfaces 55 in which exhaust holes 59 are formed. The fins 52A are arranged so that air flows smoothly between them.

  The fin 52A is provided with a hole 60 in the vicinity of the exhaust hole 59 and a hole 61 on the tip side of the fin 52A, and the duct 51 is installed through the holes 60 and 61.

  The pipe 51 is made of a metal material having a high thermal conductivity like the fins 52 </ b> A, and the liquid refrigerant sent in the direction indicated by the arrow (inlet side) by the pump passes through the pipe 51, and the blower 53. It passes through the heat radiator 52 arranged on the outer periphery of the heater and is cooled. The liquid refrigerant after being cooled by the heat dissipation module flows out from the direction indicated by the arrow (exit side) and is then stored in the reserve tank. Furthermore, a liquid refrigerant circulation cycle is formed in which the heat is returned from the reserve tank to the pump where heat from the heat generating electronic components (not shown) is taken.

  In the heat dissipation module having such a configuration, since the heatsink 52 is disposed on the outer periphery of the air blowing unit 53, the heatsink 52 and the airflowing unit 53 can be planarly arranged, so that the heat dissipation module can be thinned. Can do. Therefore, the radiator 52 and the air blowing part 53 can be mounted on the thin electronic device compactly without difficulty in a limited space.

  Moreover, since the wind sent from the ventilation part 53 is thermally diffusing the heat radiator 52 efficiently outside, the heat dissipation performance is also high (refer patent document 1).

  On the other hand, there is known a heat dissipation module including an axial flow type fan and a radiator that is difficult to be mounted on a thin electronic device while the air volume can be easily increased as compared with a centrifugal type fan. .

  FIG. 12 is a front view of the heat dissipation module. The radiator 71 is composed of an upper tank 72, a core 73, and a lower tank 74. The core 73 has a large number of flat tubes 75 in which water flows, and corrugated fins 76 having a corrugated shape are fixed therebetween. It is manufactured from a thin plate using brass with excellent thermal conductivity.

  The axial-flow type blower fan 77 attached to the rear of the core 73 increases the heat dissipation effect of the radiator 71 by sucking a large amount of air through the core 73 by rotation. The shroud 78 surrounds the blower fan 77.

  Further, the fin 76 has a fine pitch at a portion where the wind speed is large facing the portion inside the outer diameter portion of the blower fan 77, and a portion where the wind speed is small facing the portion outside the outer diameter portion of the blower fan 77. The pitch is roughened.

Therefore, in the heat radiator 71 having such a configuration, the air resistance when passing through the fins 76 is reduced and the air volume is increased even in the portion where the wind speed around the core 73 is small because the pitch of the fins 76 is coarse. Therefore, the heat dissipation increases in proportion to the air volume. Therefore, the heat dissipation effect of the fins 76 is sufficiently drawn out and the heat dissipation performance is improved (see Patent Document 2).
Japanese Patent Laying-Open No. 2005-277134 (9th page, FIG. 2) Japanese Utility Model Publication No.59-134770 (FIG. 2)

  However, it is difficult for the centrifugal blower fan 57 as disclosed in Patent Document 1 to have a larger air volume than the axial flow fan 77 as disclosed in Patent Document 2. In addition, in the radiator 52 disposed on the outer periphery of the fan housing 56 that accommodates the blower fan 57, air is smoothly flowed over the entire portion to uniformly and efficiently dissipate heat. Has become difficult.

  In particular, the air blowing direction in the vicinity of the outer periphery of the blower fan 57 is restricted in the vertical direction by the upper surface 54 and the lower surface of the fan housing 56, but is blown in the horizontal direction orthogonal to the rotation shaft 57B. The fan 57 is sent out in a direction synthesized with a tangential direction with respect to a virtual outer circumference circle formed by the maximum outer diameter of the fan 57 and a radial direction centering on the rotation shaft 57B.

  Therefore, since the air blowing direction and the longitudinal direction of the fins 52A of the respective radiators 52 do not necessarily coincide with each other, the air is discharged from the exhaust holes 59 and flows through the gaps of the fins 52A arranged at equal intervals. The flow rate of air becomes non-uniform, and the flow rate of air to be heat-exchanged varies from place to place, making it difficult to perform uniform and efficient heat dissipation.

  More specifically, among the plurality of fins 52 </ b> A constituting the heat radiator 52, the blower fan 57 is located more than the position where the fin 52 </ b> A closest to the virtual outer circumference formed by the maximum outer diameter of the blower fan 57 is disposed. Since the direction of the air flowing toward the fins 52A located on the side opposite to the rotation direction is substantially parallel to the longitudinal direction of the fins 52A, the air path resistance of the fins 52A against the air blown from the fan 57 is reduced. On the other hand, the direction of the air flowing toward the fin 52A located on the rotation direction side of the blower fan 57 from the position where the fin 52A closest to the virtual outer circumference circle formed by the maximum outer diameter of the blower fan 57 is disposed. Is largely deviated from being substantially parallel to the longitudinal direction of the fin as it is positioned on the rotational direction side, so that the fin 52A against the air blown from the fan 57 Air path resistance is increased, the flow velocity of the air passing between the fins 52A is a tendency to decrease.

  In addition, in the heat dissipation module including the axial flow type fan 77 and the heat radiator 71 as in (Patent Document 2), the air blowing direction is one direction, and the air blowing fan 77 and the heat radiator 71 are flush with each other. When placed above, it is necessary to secure a height larger than the maximum outer diameter of the blower fan, and heat dissipation from heat-generating electronic components mounted on lightweight and thin electronic devices such as laptop computers It is difficult to apply as a heat dissipation module of a cooling device that performs the above.

  The present invention solves such a conventional problem, and an object of the present invention is to improve the heat dissipation performance of a heat dissipation module of a cooling device that can be mounted on a thin electronic device.

  In order to achieve the above object, a heat dissipation module according to the present invention includes a blower unit that houses a centrifugal blower fan, a radiator that includes a plurality of fins adjacent to the blower unit, and the radiator. The refrigerant circulation type heat dissipation module includes a circulation path of liquid refrigerant that penetrates each fin to be configured, and the fin is configured to suppress disturbance of a flow of gas blown from the blower fan.

  According to the present invention, since the fins constituting the radiator are configured to suppress the disturbance of the flow of the gas blown from the blower fan, the gas blown from the blower fan over the entire radiator is arranged. It is possible to provide a thin heat dissipating module capable of suppressing the ventilation resistance and efficiently and stably dissipating heat.

  The invention according to claim 1 of the present invention penetrates through each of the fins constituting the heat radiator, the air blower containing the centrifugal blower fan, the heat sink composed of a plurality of fins adjacent to the air blower. A refrigerant circulation type heat radiation module including a circulation path for liquid refrigerant, wherein the fin is configured to suppress disturbance of a flow of gas blown from the blower fan. is there. According to the present invention, since the fins constituting the radiator are configured to suppress the disturbance of the flow of the gas blown from the blower fan, the thin heat dissipation module capable of efficient and stable heat dissipation is provided. Can be provided.

  The invention according to claim 2 of the present invention is the heat dissipation module according to claim 1, wherein the fins are arranged along the direction of the gas blown from the blower fan.

  By disposing each fin constituting the radiator along the direction of the gas blown from the blower fan, it is possible to suppress the gas blown from the blower fan from causing turbulent flow in the radiator. Therefore, it is possible to provide a thin heat dissipation module capable of efficient and stable heat dissipation.

  According to a third aspect of the present invention, in the heat dissipation module according to the second aspect, the heatsink is configured by combining two or more blocks of the fins having different arrangement directions. .

  By combining two or more blocks with different fin arrangement directions constituting the radiator so as to conform to the distribution of the direction of the gas blown from the blower fan, the gas blown from the blower fan is contained in the radiator. It is possible to further suppress the occurrence of turbulent flow. Therefore, it is possible to provide a thin heat dissipation module capable of more efficient and stable heat dissipation.

  The invention according to claim 4 of the present invention is characterized in that, in the heat dissipation module according to claim 1, one end of the fin is shaped to smoothly introduce the gas blown from the blower fan into the radiator. It is a heat dissipation module.

  By making one end of the fin into a shape that smoothly introduces the gas blown from the blower fan into the radiator, the gas blown from the fan is efficiently guided into the radiator. Therefore, the heat dissipation efficiency of the heat dissipation module can be increased.

  A fifth aspect of the present invention is the heat radiating module according to the fourth aspect, wherein the fin ends are rounded.

  By forming the end of the fin on the side that introduces the gas blown from the blower fan into the radiator, the gas blown from the fan is kept inside the radiator in a form in which turbulent flow is suppressed in the exhaust hole. Will be led smoothly. Therefore, the heat dissipation efficiency of the heat dissipation module can be increased.

  The invention according to claim 6 of the present invention is characterized in that, in the heat dissipation module according to any one of claims 1 to 5, the spacing between the fins is increased as it advances toward the rotation direction of the blower fan. It is a heat dissipation module.

  The direction of the flow of the gas blown from the blower fan on the rotation direction side changes greatly as it proceeds to the rotation direction side. Therefore, by increasing the arrangement interval of the fins toward the rotation direction side of the blower fan, it is possible to reduce the ventilation resistance when the blown gas flows into the radiator. Can be raised.

  The invention according to claim 7 of the present invention is the heat dissipation module according to any one of claims 1 to 6, characterized in that side plates are arranged so as to cover the gaps between the fins from both sides. is there.

  By arranging the side plates so as to cover the gap between the fins from both sides, the gas exhausted from the exhaust hole of the blower is restricted from flowing out of the radiator while flowing through the gap between the fins of the radiator. The Therefore, it is possible to sufficiently perform heat exchange between the liquid refrigerant circulating in the pipe line and the gas over the entire air path in the gap between the fins, and thus provide a heat dissipation module capable of more efficient heat dissipation. Can do.

  Invention of Claim 8 of this invention is a cooling device provided with the heat receiving means and the refrigerant | coolant transport means, Comprising: The cooling module characterized by having provided the thermal radiation module of any one of Claims 1-7. Device. The cooling performance of the cooling device can be improved by using a heat dissipation module with excellent heat dissipation efficiency for a liquid cooling type cooling device mounted on a thin electronic device such as a notebook computer.

  Next, an embodiment of the present invention relates to a heat dissipation module used in a liquid cooling type cooling device for forcibly circulating a liquid refrigerant mounted on an electronic device such as a notebook personal computer, and will be described below with reference to the drawings.

  In each drawing, the cover side that constitutes the air blowing section is described as an upper side, and the frame side is described as a lower side.

Example 1
1 is an overall perspective view of a heat dissipation module according to Embodiment 1 of the present invention, FIG. 2 is an overall perspective view of the heat dissipation module according to Embodiment 1 of the present invention with a cover removed, and FIG. 3 is an embodiment of the present invention. FIG. 4 is an overall configuration diagram of a cooling device provided with a heat dissipation module according to Embodiment 1 of the present invention.

  First, as shown in FIG. 1 and FIG. 2, in the heat dissipation module 1, the air blower 2 having a substantially rectangular planar shape is composed of a frame 3 arranged at the lower part and a cover 4 arranged at the upper part thereof, and is a centrifugal type. The blower fan 5 is accommodated.

  Here, the frame 3 is integrally formed with a bottom surface and four side surfaces by resin molding, aluminum alloy die casting, or the like. A plurality of exhaust holes 3a for exhausting air is formed.

  Further, the cover 4 is formed into a thin plate shape by stamping molding of a metal material such as aluminum or stainless steel or a resin material, and a substantially circular intake port 4a for sucking external air is disposed at the center thereof. ing.

  Further, a centrifugal blower fan 5 is disposed so as to be sandwiched and accommodated between the frame 3 and the cover 4, and the blower fan 5 has a cylindrical outer peripheral surface and a hub portion 5a having a cylindrical outer peripheral surface in the centrifugal direction. It is comprised from the some blade part 5b extended substantially radially.

  When the blower fan 5 rotates at a high speed in the direction indicated by the arrow R, external air flows from the substantially circular intake port 4a disposed in the center of the cover 4 to the rotary shaft 5c of the blower fan 5 (see FIG. 3). Inhaled along the axial direction.

  Furthermore, since the direction of wind of the sucked air is changed in the centrifugal direction of the plurality of blade portions 5b inside the blower portion 2 by the rotational movement of the blade portion 5b, the virtual air formed by the maximum outer diameter of the blower fan 5 is changed. It is sent out in the direction synthesized by the tangential direction with respect to the outer circumference circle C (see FIG. 3) and the radial direction around the rotation axis 5c. A part of the sucked air collides with the inner walls of the frame 3 and the cover 4 and is finally exhausted from the plurality of exhaust holes 3a along the inner walls.

  In addition, as shown by the broken line portion in FIG. 2, it is necessary to remove heat from the liquid refrigerant in a relatively narrow space outside the two side surfaces provided with the exhaust holes 3 a of the frame 3. Two radiators 6 each having a plurality of thin plate-like fins 6a made of a metal material having good thermal conductivity such as aluminum or copper so as to have a larger surface area are arranged. Further, as shown in FIG. 3, the radiator 6 includes a block composed of a plurality of fins 6 a disposed substantially parallel to the longitudinal direction of the heat radiation module 1 and a block composed of a plurality of fins 6 a disposed obliquely. It is a combination.

  Each radiator 6 is provided with a metal pipe 7 that is bent in a U-shape to form a reciprocating path, and each fin 6a that constitutes the pipe 7 and the two radiators 6 Since it is necessary to keep good thermal conductivity from the pipe line 7 to the fin 6a, the connection is firmly coupled by welding or fitting.

  With the configuration as described above, the liquid refrigerant heated by the heat taken from the heat generating electronic components in the heat receiver of the cooling device (not shown) is transported by the pipe line 7 of the heat radiation module 1 and circulated in the direction indicated by the arrow A. To do.

  Therefore, the heat of the liquid refrigerant flowing through the pipe line 7 is conducted to the fins 6a of the radiator 6, and is further radiated forcibly by exchanging heat with the air flowing through the gaps between the fins 6a.

  Further, side plates 6b are arranged on both upper and lower sides of each radiator 6, and air that is exhausted from the exhaust holes 3a and flows between the fins 6a of the radiator 6 passes through between the fins 6a. Is prevented from flowing out. Therefore, air flows smoothly and sufficiently over the entire air passage between the fins 6a, and heat exchange between the liquid refrigerant circulating in the pipe 7 and the air is sufficiently performed, so that more efficient heat dissipation is possible. Therefore, the heat dissipation performance can be improved.

  Next, FIG. 3 is a plan view showing the arrangement of fins 6a constituting the heat radiator 6 of the heat radiation module 1 according to the first embodiment of the present invention.

  In FIG. 3, an arrow drawn between the fins 6 a and the blower fan 5 represents the direction of the air flow blown from the blower fan 5. As can be seen from the distribution of the arrows, the air flowing toward the fins 6 a flows substantially in parallel along the longitudinal direction of the heat dissipation module 1 on the counter-rotating direction side of the blower fan 5. On the other hand, the air on the rotational direction side of the blower fan 5 flows in a direction inclined with respect to the longitudinal direction of the heat dissipation module 1. In addition, the air flow in the direction of the rotation of the blower fan 5 has a greater inclination with respect to the longitudinal direction of the heat dissipation module 1 as it proceeds in the direction of rotation of the blower fan 5.

  In the first embodiment, in consideration of the air flow from the blower fan 5 described above, the direction of the block of the fins 6a on the side opposite to the rotation direction of the blower fan 5 is arranged substantially parallel to the longitudinal direction of the heat dissipation module 1, The fan 6a block on the rotational direction side of the blower fan 5 is disposed with the fins 6a inclined in the same direction with respect to the longitudinal direction of the heat dissipation module 1 so as not to disturb the flow of air blown from the blower fan 5. did. Thereby, since the air flowing through the exhaust hole 3a on the rotation direction side flows smoothly without causing turbulent flow in the radiator 6, the heat radiation performance is improved.

  Further, in the heat dissipation module of the first embodiment, the interval between the fins 6 a is increased as the fan fan 5 rotates in the direction of rotation. This is because the flow of air flowing into the exhaust holes 3a on the rotation direction side flows greatly inclined with respect to the longitudinal direction of the heat dissipation module 1 as it proceeds to the rotation direction side of the blower fan 5, so that these air radiates heat. This is because it is considered to reduce the ventilation resistance when flowing into the vessel 6. Thereby, the air flowing through the exhaust hole 3a on the rotation direction side is smoothly introduced into the radiator 6.

  By arranging the fins 6a as described above, the air blown from the blower fan 5 flows in the radiator 6 in a form in which turbulence is suppressed, and sufficient air flows in the radiator 6. Therefore, efficient heat dissipation becomes possible. Therefore, the heat dissipation module described in the first embodiment can improve the heat dissipation performance together with the reduction in thickness.

  In addition, it is desirable to make the space | interval between the fins 6a adjacent to each other as small as possible without interfering with the air flow from the blower fan 5, and to arrange the fins 6a densely. By doing so, the area of the heat radiating surface where the heat exchange between the liquid refrigerant circulating in the pipe line 7 and the air is increased, and more efficient heat radiation becomes possible.

  FIG. 4 is an overall configuration diagram of the cooling device 8 including the heat dissipation module 1 according to the first embodiment of the present invention. The heat receiver 9 including the pump, the reserve tank 10, and the heat dissipation module 1 described above are the main components. This is a liquid cooling type cooling device in which liquid refrigerant is forcedly circulated.

  The heat receiver 9 is provided with a heat receiving surface to be thermally connected to a heat generating electronic component (not shown) on the bottom surface side, and the heat generating electronic component in a high temperature state is formed inside the heat receiver 9 through the heat receiving surface. The heat is taken away by the heat exchange with the liquid refrigerant flowing through the liquid flow path and cooled.

  Further, the heat receiver 9 performs an operation for forcibly sending out the liquid refrigerant, which has been subjected to heat exchange by the action of a built-in pump (not shown), to a connecting pipe 11 such as a flexible tube or a metal pipe. ing.

  And the liquid refrigerant sent out from the heat receiver 9 is transported to the metal pipe line 7 arranged in the radiator 6 through the connecting pipe 11, and each of the radiators 6 having the plurality of fins 6a is transported. While passing through the inside, heat is exchanged with the air flowing through the gaps between the fins 6a to dissipate the heat, and again passes through the connection pipe 12 such as a flexible tube or a metal pipe and is sent to the reserve tank 10.

  That is, the liquid refrigerant that has exchanged heat with the heat-generating electronic components and has reached a high temperature flows through the metal pipes 7 disposed in the respective radiators 6, so that the liquid refrigerant sequentially heats between the radiators 6. Dissipate heat repeatedly while replacing.

  Then, the liquid refrigerant after the heat exchange with the radiator 6 is mixed with the liquid refrigerant in the reserve tank 10 that is already stored, and the same amount of liquid refrigerant is fed into the flexible tube, metal tube, etc. And return to the heat receiver 9.

  As described above, the liquid refrigerant in the cooling device 8 is the main component of the cooling device 8, the heat receiver 9 → the connection pipe 11 → the pipe line 7 arranged in the radiator 6 → the connection pipe 12 → the reserve tank. 10 → connecting pipe 13 → the path of the heat receiver 9 is continuously circulated, the heat receiving action on the heat receiving surface of the heat receiver 9 and the heat releasing action on the heat radiator 6 are repeated, and the heat of the heat generating electronic components thermally connected to the heat receiving face is obtained. The heat-generating electronic components are cooled by forcibly releasing heat.

  In addition, you may use the thermal radiation module described in a following example for the thermal radiation module used for the cooling device of this invention.

(Example 2)
FIG. 5 is an overall perspective view of the heat dissipation module according to the second embodiment of the present invention with the cover removed, and FIG. 6 is a plan view illustrating the arrangement of fins constituting the heat dissipation module according to the second embodiment of the present invention. is there.

  First, as shown in FIG. 5, in the heat dissipation module 21, the air blower portion 22 having a substantially rectangular planar shape is composed of a frame 23 arranged at the lower portion and a cover (not shown) arranged at the upper portion thereof. The centrifugal blower fan 24 is accommodated.

  Here, the frame 23 is integrally formed with a bottom surface and four side surfaces by resin molding or die casting of an aluminum alloy, and air is sucked into two side surfaces opposed to each other with the blower fan 24 therebetween. An exhaust hole 23a for exhausting air is formed.

  Further, a centrifugal blower fan 24 is disposed so as to be sandwiched and accommodated between the frame 23 and the cover. The blower fan 24 has a hub portion 24a having a cylindrical outer peripheral surface and a centrifugal direction from the outer peripheral surface thereof. It is comprised from the several blade part 24b extended radially.

  Here, when the blower fan 24 rotates at a high speed in the direction indicated by the arrow R, the outside air is opposed to the upper surface of the hub portion 24a of the blower fan 24, and the outside air is blown from the intake port disposed in the center of the cover. The air is sucked in from the direction along the axial direction of the rotating shaft 24c (see FIG. 6) of the fan 24. Further, the direction of wind of the sucked air is changed in the centrifugal direction of the plurality of blade portions 24b inside the blower portion 22 by the rotational movement of the blade portion 24b, so that the virtual outer diameter formed by the maximum outer diameter of the blower fan 24 is increased. The tangential direction with respect to the outer circumference circle C (see FIG. 6) and the radial direction centered on the rotating shaft 24c are sent out in the combined direction. A part of the sucked air collides with the inner wall of the frame 23 and the cover, and is finally exhausted from the plurality of exhaust holes 23a along the inner wall.

  In addition, as shown by the broken line portion in FIG. 5, it is necessary to remove heat from the liquid refrigerant in a relatively narrow space outside the two side surfaces provided with the exhaust holes 23a of the frame 23. Two radiators 25 each having a plurality of thin plate-like fins 25a made of a metal material having good thermal conductivity such as aluminum or copper so as to have a larger surface area are arranged. Further, as shown in FIG. 6, the radiator 25 includes a substantially parallel block composed of a plurality of fins 25 a arranged substantially parallel to the longitudinal direction of the heat radiating module 21 and fins 25 a inclined with respect to the longitudinal direction of the radiating module 21. It is a combination of an intermediate area block and an inclined block. Further, the arrangement direction of the intermediate area block and the inclined block is different.

  The fins 25a constituting the respective radiators 25 are bent in a U-shape and penetrated by metal pipes 26 constituting a reciprocating path, thereby constituting the pipes 26 and the radiator 25. The connection with the fin 25a is firmly bonded by welding or fitting in order to maintain good thermal conductivity from the pipe line 26 to the fin 25a.

  With the configuration as described above, the liquid refrigerant heated by the heat taken from the heat generating electronic components in the heat receiver of the cooling device (not shown) is transported to the pipe line 26 of the heat radiation module 21 and circulated in the direction indicated by the arrow A. To do.

  Therefore, the heat of the liquid refrigerant is conducted to the fins 25a of the respective radiators 25, and is further forcibly radiated by exchanging heat with the air flowing through the gaps between the fins 25a.

  Further, side plates 25b are arranged on both upper and lower sides of each radiator 25, and the air that is exhausted from the exhaust holes 23a and flows between the fins 25a of the radiator 25 passes through between the fins 25a. Is prevented from flowing out. Therefore, air flows smoothly and sufficiently over the entire air path in the gap between the fins 25a, and heat exchange between the liquid refrigerant circulating in the pipe 26 and the air is sufficiently performed, so that more efficient heat dissipation is possible. Therefore, the heat dissipation performance can be improved.

  Next, FIG. 6 is a plan view for explaining the arrangement of the fins 25a constituting the heat radiation module 21 according to the second embodiment of the present invention.

  In FIG. 6, the arrows drawn between the fins 25 a and between the blower fans 24 indicate the direction of the air flow blown from the blower fan 24, and the distribution of the direction of the air flowing toward the fins 25 a is implemented. This is the same as the heat dissipation module 1 of Example 1. Therefore, the air flows in a substantially parallel direction along the longitudinal direction of the heat dissipation module 21 on the counter-rotating direction side of the blower fan 24. On the other hand, the air on the rotational direction side of the blower fan 24 flows in directions different from the longitudinal direction of the heat dissipation module 21. In addition, the air flow in the direction of the rotation of the blower fan 24 has a greater inclination with respect to the longitudinal direction of the heat dissipation module 21 as it proceeds in the direction of rotation of the blower fan 24.

  In the second embodiment, in consideration of the flow of air blown from the blower fan 24 described above, the orientation of the blocks of the fins 25a on the side opposite to the rotation direction of the blower fan 24 is arranged substantially parallel to the longitudinal direction of the heat dissipation module 21. Then, the direction of the block of the fin 25a on the rotation direction side of the blower fan 24 is inclined in the same direction with respect to the longitudinal direction of the heat dissipation module 21 so as not to disturb the flow of air blown from the blower fan 24. . Further, the block of the fin 25a in the intermediate region between the counter-rotation direction side and the rotation direction side of the blower fan 24 is the rotation direction side described above according to the direction of the air flow flowing into the intermediate region of the exhaust hole 23a. The fins 25a are arranged at an angle different from the inclination angle of the fins 25a. Thereby, the air flowing through the exhaust hole 23a on the rotation direction side is less likely to cause turbulence in the radiator 25 and flows smoothly, so that the heat dissipation performance is improved.

  Further, in the heat dissipation module of the second embodiment, the interval between the fins 25a is increased as the air flow proceeds to the rotation direction side of the blower fan 24. This is because the flow of air flowing into the exhaust holes 23a on the rotational direction side is greatly inclined with respect to the longitudinal direction of the heat dissipation module 21 as it proceeds to the rotational direction side of the blower fan 24. This is because it is considered to reduce the ventilation resistance when flowing into the vessel 25. Thereby, the air which flows into the exhaust hole 23a of the rotation direction side is efficiently introduced into the radiator.

  By arranging the fins 25a as described above, the air blown from the blower fan 24 passes through the radiator 25 in a form in which turbulence is suppressed, and sufficient air flows in the radiator 25. Therefore, efficient heat dissipation becomes possible. Therefore, the heat dissipation module 21 can be improved in heat dissipation performance together with the reduction in thickness.

  In addition, it is desirable to make the space | interval between the fins 25a adjacent to each other as small as possible without interfering with the air flow from the blower fan 24, and to arrange the fins 25a densely. By doing so, the area of the heat radiating surface where the heat exchange between the liquid refrigerant circulating in the pipe line 26 and the air is increased, and more efficient heat dissipation becomes possible.

(Example 3)
FIG. 7 is an overall perspective view of the heat dissipation module according to the third embodiment of the present invention with the cover removed, and FIG. 8 is a plan view illustrating the arrangement of fins constituting the heat dissipation module according to the third embodiment of the present invention. is there.

  First, as shown in FIG. 7, in the heat dissipation module 31, the air blower 32 having a substantially rectangular planar shape is composed of a frame 33 arranged at the lower part and a cover (not shown) arranged at the upper part. The centrifugal blower fan 34 is accommodated.

  Here, the frame 33 is integrally formed with a bottom surface and four side surfaces by resin molding or die casting of an aluminum alloy, and air is sucked into two side surfaces facing each other with the blower fan 34 interposed therebetween. An exhaust hole 33a for exhausting air is formed.

  Further, a centrifugal blower fan 34 is disposed so as to be sandwiched and accommodated between the frame 33 and the cover. The blower fan 34 has a hub portion 34a having a cylindrical outer peripheral surface and a centrifugal direction from the outer peripheral surface thereof. It is comprised from the several blade part 34b extended radially.

  Here, when the blower fan 34 rotates at a high speed in the direction indicated by the arrow R, the outside air is opposed to the upper surface of the hub portion 34a of the blower fan 34 and air is blown from the intake port disposed in the center of the cover. The air is sucked from the direction along the axial direction of the rotation shaft 34c (see FIG. 8) of the fan 34. Furthermore, the direction of the wind of the sucked air is changed to the centrifugal direction of the plurality of blade portions 34b inside the blower portion 32 by the rotational movement of the blade portion 34b. The tangential direction with respect to the outer circumference circle C (see FIG. 8) and the radiation direction centered on the rotation shaft 34c are sent out. A part of the sucked air collides with the inner wall of the frame 33 and the cover, and is finally exhausted from the plurality of exhaust holes 33a along the inner wall.

  Further, as shown by the broken line portion in FIG. 7, it is necessary to remove heat from the liquid refrigerant in a relatively narrow space outside the two side surfaces provided with the exhaust holes 33a of the frame 33. A radiator 35 in which a plurality of thin plate-like fins 35a made of a metal material having a good thermal conductivity such as aluminum or copper is arranged so as to have a larger surface area is attached. Furthermore, the arrangement directions of the fins 35a constituting the radiator 35 are all different as shown in FIG.

  Each radiator 35 is provided with a metal pipe 36 that is bent in a U-shape to form a reciprocating path, and a connection between the pipe 36 and a fin 35 a that constitutes the radiator 35 is provided. Are firmly bonded by welding or fitting in order to maintain good thermal conductivity from the pipe line 36 to the fins 35a.

  With the configuration as described above, the liquid refrigerant heated by the heat taken from the heat generating electronic components in the heat receiver of the cooling device (not shown) is transported to the pipeline 36 of the heat dissipation module 31 and circulated in the direction indicated by the arrow A. To do.

  Therefore, the heat of the liquid refrigerant is conducted to the fins 35a of the respective radiators 35, and is further forcibly radiated by exchanging heat with the air flowing through the gaps between the fins 35a.

  In addition, side plates 35b are arranged on both upper and lower sides of each radiator 35, and the air that is exhausted from the exhaust holes 33a and flows between the fins 35a of the radiator 35 passes through between the fins 35a. Is prevented from flowing out. Therefore, air flows smoothly and sufficiently over the entire air path between the fins 35a, and heat exchange between the liquid refrigerant circulating in the pipe 36 and the air is sufficiently performed, so that more efficient heat dissipation is possible. Therefore, the heat dissipation performance can be improved.

  Next, FIG. 8 is a plan view for explaining the arrangement of the fins 35a constituting the heat radiation module 31 according to the third embodiment of the present invention.

  In FIG. 8, the arrow drawn between the fin 35a and the blower fan 34 represents the direction of the flow of air blown from the blower fan 34, and the distribution of the direction of the air flowing toward the fin 35a is an embodiment. This is the same as the heat dissipation modules 1 and 2. Therefore, the air flows in a substantially parallel direction along the longitudinal direction of the heat dissipation module 31 on the side opposite to the rotation direction of the blower fan 34. On the other hand, the air on the rotational direction side of the blower fan 34 flows in a direction inclined with respect to the longitudinal direction of the heat dissipation module 31. Further, the air flow in the direction of rotation of the blower fan 34 has a greater inclination with respect to the longitudinal direction of the heat dissipation module 31 as it proceeds in the direction of rotation of the blower fan 34.

  In the third embodiment, considering that the direction of the flow of air flowing in from the blower fan 34 differs depending on the position of the exhaust hole 33 a, each fin 35 a has a specific inclination with respect to the longitudinal direction of the heat dissipation module 31. It is arranged with holding. Thereby, the air flowing through the exhaust hole 33a on the rotation direction side is less likely to cause turbulence in the radiator 35 and flows smoothly, so that the heat dissipation performance is improved.

  Further, in the heat dissipation module of the third embodiment, the interval between the fins 35a is increased as the air flow proceeds to the rotation direction side of the blower fan 34. This is because the flow of air flowing into the exhaust holes 33a on the rotation direction side is greatly inclined with respect to the longitudinal direction of the heat dissipation module 31 as it proceeds to the rotation direction side of the blower fan 34. This is because it is considered to reduce the ventilation resistance when flowing into the vessel 35. Thereby, the air which flows into the exhaust hole 33a on the rotation direction side is efficiently introduced into the radiator.

  By arranging the fins 35a as described above, the air blown from the blower fan 34 flows in the radiator 35 in a form in which the disturbance of the flow is suppressed, and sufficient air is circulated in the radiator 35. Therefore, efficient heat dissipation becomes possible. Therefore, the heat dissipation module 31 can be improved in heat dissipation performance together with the reduction in thickness.

  In addition, it is desirable that the interval between the fins 35a adjacent to each other is as small as possible so as not to hinder the air flow from the blower fan 34, and the fins 35a are arranged densely. By doing so, the area of the heat radiating surface where the heat exchange between the liquid refrigerant circulating through the pipe line 36 and the air is increased, and more efficient heat radiation becomes possible.

Example 4
FIG. 9 is an overall perspective view of the heat dissipation module according to the fourth embodiment of the present invention with the cover removed, and FIG. 10 is a plan view illustrating the arrangement and shape of fins constituting the heat dissipation module according to the fourth embodiment of the present invention. FIG.

  First, as shown in FIG. 9, in the heat dissipation module 41, the air blowing part 42 having a substantially rectangular planar shape is composed of a frame 43 arranged at the lower part and a cover (not shown) arranged at the upper part. The centrifugal blower fan 44 is accommodated.

  Here, the frame 43 is integrally formed with a bottom surface and four side surfaces by resin molding or die casting of an aluminum alloy, and air is sucked into two side surfaces opposed to each other with the blower fan 44 interposed therebetween. An exhaust hole 43a for exhausting air is formed.

  Further, a centrifugal blower fan 44 is disposed so as to be sandwiched and accommodated between the frame 43 and the cover, and the blower fan 44 has a hub portion 44a having a cylindrical outer peripheral surface and a substantially centrifugal direction from the outer peripheral surface in the centrifugal direction. It is comprised from the several blade part 44b extended radially.

  Here, when the blower fan 44 rotates at a high speed in the direction indicated by the arrow R, the outside air is opposed to the upper surface of the hub portion 44a of the blower fan 44 and air is blown from the intake port disposed in the center of the cover. The air is sucked from the direction along the axial direction of the rotation shaft 44c (see FIG. 10) of the fan 44. Further, the direction of the wind of the sucked air is changed to the centrifugal direction of the plurality of blade portions 44b inside the blower portion 42 by the rotational movement of the blade portion 44b. The tangential direction with respect to the outer circumference circle C (see FIG. 10) and the radiation direction centered on the rotation shaft 44c are sent out. A part of the sucked air collides with the inner wall of the frame 43 and the cover, and is finally exhausted from the plurality of exhaust holes 43a along the inner wall.

  Further, as shown by the broken line portion in FIG. 9, it is necessary to remove heat from the liquid refrigerant in a relatively narrow space outside the two side surfaces provided with the exhaust holes 43 a of the frame 43. A radiator 45 in which a plurality of thin plate-like fins 45a made of a metal material having a good thermal conductivity such as aluminum or copper is arranged so as to have a larger surface area is attached. Furthermore, the air introduction part of each fin 45a which comprises the heat radiator 45 is processed into the round shape as shown in FIG.

  Each radiator 45 is provided with a metal pipe 46 that is bent in a U-shape to form a reciprocating path, and a connection between the pipe 46 and the fin 45a that constitutes the radiator 45 is provided. Are firmly bonded by welding or fitting in order to maintain good thermal conductivity from the pipe 46 to the fins 45a.

  With the configuration as described above, the liquid refrigerant heated by the heat taken from the heat generating electronic components in the heat receiver of the cooling device (not shown) is transported to the conduit 46 of the heat dissipation module 41 and circulated in the direction indicated by the arrow A. To do.

  Therefore, the heat of the liquid refrigerant is conducted to the fins 45a of the respective radiators 45, and is further forcibly radiated by exchanging heat with the air flowing through the gaps between the fins 45a.

  In addition, side plates 45b are arranged on both upper and lower sides of each radiator 45, and the air that is exhausted from the exhaust holes 43a and flows between the fins 45a of the radiator 45 passes through between the fins 45a. Is prevented from flowing out. Accordingly, air flows smoothly and sufficiently over the entire air path between the fins 45a, and heat exchange between the liquid refrigerant circulating in the pipe 46 and the air is sufficiently performed, so that more efficient heat dissipation is possible. Therefore, the heat dissipation performance can be improved.

  Next, FIG. 10 is a plan view for explaining the arrangement of the fins 45a constituting the heat dissipation module 41 of the fourth embodiment of the present invention.

  In FIG. 10, the plurality of fins 45 a configuring the heat radiator 45 are disposed substantially parallel to the longitudinal direction of the heat radiation module 41. The arrows drawn between the fins 45a and the blower fan 44 indicate the direction of the flow of air blown from the blower fan 44, and the distribution of the direction of the air flowing toward the fin 45a is the first to third embodiments. This is the same as the heat dissipation module. Therefore, the air flows in a substantially parallel direction along the longitudinal direction of the heat dissipation module 41 on the counter-rotating direction side of the blower fan 44. On the other hand, the air on the rotational direction side of the blower fan 44 flows in a direction inclined with respect to the longitudinal direction of the heat dissipation module 41. Further, the air flow in the direction of rotation of the blower fan 44 has a greater inclination with respect to the longitudinal direction of the heat dissipation module 41 as it proceeds in the direction of rotation of the blower fan 44.

  In the fourth embodiment, in order to improve the inflow property of the air flowing into the exhaust holes 43a with the direction inclined with respect to the fin arrangement direction (longitudinal direction of the heat radiation module 45) to the heat radiator, some fins The tip of 45a was formed in a round shape.

  Since the tips of the fins 45a, which are the air introduction portions of the radiator 45, are rounded, the air blown from the blower fan 44 is less likely to cause turbulence when flowing into the radiator 45. The heat dissipating performance is improved.

  Further, in the heat dissipation module of the fourth embodiment, the interval between the fins 45a is increased as the air flow proceeds to the rotation direction side of the blower fan 44. This is because the flow of air flowing into the exhaust holes 43a on the rotational direction side is greatly inclined with respect to the longitudinal direction of the heat dissipation module 41 as it proceeds to the rotational direction side of the blower fan 44. This is a result in consideration of reducing the ventilation resistance when flowing into the vessel 45. Thereby, the air which flows into the exhaust hole 43a of the rotation direction side is efficiently introduced into the radiator.

  By arranging the fins 45a as described above, the air blown from the blower fan 44 flows in the radiator 45 in a form in which the disturbance of the flow is suppressed, and sufficient air is circulated in the radiator 45. Therefore, efficient heat dissipation becomes possible. Therefore, the heat dissipation module 41 can be improved in heat dissipation performance together with the reduction in thickness.

  In the present invention, the dimensions, quantities, materials, shapes, relative arrangements, and the like of the constituent elements in the descriptions of Examples 1 to 4 are not particularly limited to those described above. The scope of the present invention is not intended to limit the scope of the present invention, but is merely a description of one embodiment, and various modifications are possible. Although two radiators are attached to the outside of the side surfaces in the two directions, they may be attached in two directions adjacent to each other.

  Further, the number of radiators to be attached is not limited to two, and may be one, three, or four or more outside one side surface of the air blowing unit.

  As for the arrangement method of the pipes to the radiators, since a reciprocating path is formed for each radiator, two fins are provided in parallel to each fin. Only one direction of the pipe line may be provided through each fin of the radiator, or conversely, three or more pipe lines may be provided.

  Further, the outer shape of the air blowing portion may not be a substantially square or a substantially parallelogram, but may be a substantially circular shape, a substantially triangular shape, or other various polygons. It is also possible to dispose the air from both sides along the longitudinal direction of the rotating shaft.

  As for the blower fan, as in the present embodiment, a blower fan composed of a hub portion having a cylindrical outer peripheral surface and a plurality of blade portions extending substantially radially from the outer peripheral surface in the centrifugal direction is preferable. For example, another type of centrifugal blower fan such as a sirocco fan in which a blade portion is provided only on the outer peripheral portion of the disk-shaped member may be used.

  The present invention can be applied to a cooling device that cools a heat-generating electronic component by natural circulation or forced circulation of a liquid refrigerant.

The whole perspective view of the heat dissipation module of Example 1 of the present invention. The whole perspective view in the state where the cover of the heat dissipation module of Example 1 of the present invention was removed The top view explaining arrangement | positioning of the fin which comprises the thermal radiation module of Example 1 of this invention The whole block diagram of the cooling device provided with the heat dissipation module of Example 1 of the present invention. The whole perspective view in the state where the cover of the heat dissipation module of Example 2 of the present invention was removed The top view explaining the full length of the fin which comprises the thermal radiation module of Example 2 of this invention The whole perspective view in the state where the cover of the heat dissipation module of Example 3 of the present invention was removed The top view explaining the full length of the fin which comprises the thermal radiation module of Example 3 of this invention The whole perspective view in the state where the cover of the heat dissipation module of Example 4 of the present invention was removed The top view explaining the full length of the fin which comprises the thermal radiation module of Example 4 of this invention Overall perspective view of a conventional heat dissipation module disclosed in (Patent Document 1) Front view of a conventional heat dissipation module disclosed in (Patent Document 2)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat radiation module 2 Air blower part 3 Frame 3a Exhaust hole 4 Cover 4a Intake port 5 Blower fan 5a Hub part 5b Blade part 5c Rotating shaft 6 Radiator 6a Fin 6b Side plate 7 Pipe 8 Cooling device 9 Heat receiver 10 Reserve tank 11 Connection Piping 12 Connecting piping 13 Connecting piping 21 Heat radiation module 22 Blower portion 23 Frame 23a Exhaust hole 24 Blower fan 24a Hub portion 24b Blade portion 24c Rotating shaft 25 Radiator 25a Fin 25b Side plate 26 Pipe 31 Heat radiation module 32 Blower portion 33 Frame 33a Exhaust hole 34 Blower fan 34a Hub part 34b Blade part 34c Rotating shaft 35 Radiator 35a Fin 35b Side plate 36 Pipe line 41 Heat radiation module 42 Blower part 43 Frame 43a Exhaust hole 44 Blower fan 44a Hub part 44b Blur 44c Rotating shaft 45 Radiator 45a Fin 45b Side plate 46 Pipe line 51 Pipe line 52 Radiator 52A Fin 53 Blower part 54 Upper surface 55 Lower surface 56 Fan housing 57 Blower fan 57A Blade 57B Rotating shaft 58 Intake hole 59 Exhaust hole 60 Hole 61 Hole 71 Radiator 72 Upper tank 73 Core 74 Lower tank 75 Tube 76 Fin 77 Blower fan 78 Shroud R Direction of rotation of the blower fan A Direction of circulation of liquid refrigerant C Virtual outer circumference circle

Claims (8)

Refrigerant comprising: a blower housing a centrifugal blower fan; a radiator composed of a plurality of fins adjacent to the blower; and a liquid refrigerant circulation path penetrating each fin constituting the radiator. It is a circulation type thermal radiation module, Comprising: The said fin was comprised so that disorder of the flow of the gas ventilated from the said ventilation fan might be suppressed. The heat dissipation module according to claim 1, wherein the fins are arranged along a direction of gas blown from the blower fan. 3. The heat dissipation module according to claim 2, wherein the heat radiator is configured by combining two or more fin blocks having different arrangement directions. The heat radiating module according to claim 1, wherein one end of the fin has a shape that smoothly introduces the gas blown from the blower fan into the radiator. The heat radiation module according to claim 4, wherein an end portion of the fin is formed in a round shape. The heat dissipating module according to any one of claims 1 to 5, wherein an interval between the fins is increased as it advances toward a rotation direction of the blower fan. The heat radiating module according to claim 1, wherein side plates are arranged on the upper and lower surfaces of the fin so as to cover the gap between the fins from both sides. A cooling device comprising a heat receiving means and a refrigerant transporting means, comprising the heat dissipation module according to any one of claims 1 to 7.

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