JP6182299B2 - Radiator - Google Patents

Description

  The present invention relates to a radiator that absorbs heat from a high-temperature part such as an electric device and transports it to a low-temperature part or dissipates heat into the atmosphere, and particularly relates to a radiator using a heat pipe or a radiation fin.

  2. Description of the Related Art A radiator that is thermally connected to a heating element provided in an electric device or the like and radiates heat generated in the heating element is known. As members used in the radiator, there are known fins that radiate heat conducted from a heating element into the air, and heat pipes that efficiently transfer heat by evaporation and condensation of the working fluid enclosed inside.

  With regard to such a heatsink, research on materials and shapes has been conducted so that efficient exhaust heat can be obtained. For example, in the heat transport path from the connection part with the heat generating element in the radiator to the heat dissipation fin, the heat transport efficiency can be improved by ensuring a wide cross-sectional area of the path or using a material with high thermal conductivity. Can be improved.

  As a heat radiator using a conventional heat pipe, there is one in which the heat pipe is disposed so as to penetrate the heat radiating fins (see, for example, Patent Document 1). According to such a structure, the heat moved through the heat pipe is suitably conducted to the heat radiating fins, and the heat radiation efficiency into the air is improved.

JP 2012-21698 A

  As described above, the heat dissipation efficiency of the entire radiator may be improved depending on the shape and arrangement of the members constituting the radiator. On the other hand, in recent years when the use of small electronic devices has progressed, the size and shape of the entire radiator may be limited by the device shape designed in advance.

  The present invention has been made in view of such a problem, and a radiator capable of realizing a suitable radiation efficiency by improving the efficiency of heat transfer in each part without increasing the size of the entire radiator. The purpose is to provide.

In order to solve the above problem, the radiator of the present invention includes a base portion for heat heat from the heating element, the plate portion comprising a plate-like member, and a plurality of radiating fins connected to the plate portion, a heat radiating body which radiates heat, heat portion in contact with said base portion, and a heat pipe having two or more heat dissipation area of contact with the radiator, each of the two or more heat dissipation area includes: the heat radiator The plate portion has a flat shape having a first flat surface in contact with the plate portion , and the plate portion has a second flat surface in contact with the first flat surface of the heat radiating portion. In a state of contact, the distance between the two or more first flat surfaces is relatively longer as the distance from the center line is shorter, and is relatively shorter as the distance from the center line is farther.

  According to this aspect, the heat radiating part of the heat pipe and the heat radiating body are in contact with each other on flat surfaces. For this reason, the area of both contact surfaces can be ensured more, and the improvement of the heat transport efficiency between both can be implement | achieved. Since a typical heat pipe is a tubular member having a substantially circular cross-sectional shape, when the heat radiator is brought into contact as it is, there is a possibility that the area of the contact surface between the two becomes extremely small. On the other hand, by forming the heat radiation part of the heat pipe in a flat shape as in this embodiment, a large area of the contact surface can be ensured.

  The heat radiation part of the heat pipe may be locally formed in a flat shape so that the area of the flat surface is larger than other parts, and other parts of the heat pipe are also flat. It may be formed in a shape. Moreover, the same effect as the above-mentioned thing is acquired also by processing the shape of the site | part which contact | connects the heat pipe in a heat radiator into the shape match | combined with the peripheral surface shape of the heat pipe. However, there is a technical problem that an operation for processing the shape of the radiator is thus required, and the number of steps for manufacturing the radiator is increased.

  The preferable aspect of the heat radiator of this invention is provided with two or more said heat radiators, and these heat radiators are arrange | positioned so that each may contact | connect the flat surface of the said heat radiating part from a different direction.

  According to this aspect, the heat radiation part of the heat pipe is formed in a flat shape having a plurality of flat surfaces, and the plurality of heat radiators are arranged so as to be in contact with each flat surface. Specifically, in the case of a flat heat pipe having a flat surface in one direction and the opposite direction of the one direction, the heat dissipating body arranged so as to contact both surfaces of the flat surface is a heat pipe. It is arranged so as to sandwich.

  According to such a structure, the area of the contact surface of a heat pipe and a heat radiator can be ensured larger compared with the case where one heat radiator is made to contact with a heat pipe. As a result, the efficiency of heat conduction from the heat pipe to the heat radiating body can be improved, the surface area of the entire heat radiating body can be increased, and the heat radiating efficiency can be improved.

  In a preferred aspect of the radiator of the present invention, the plurality of radiating fins are arranged in parallel with a direction orthogonal to an axial direction connecting the heat receiving part and the heat radiating part, which are heat transport paths of the heat pipe, as an arrangement direction. Is done.

  According to this aspect, heat is radiated to the surrounding cooling air through the plurality of heat radiating fins extending from the heat radiating body. Each of the radiating fins is typically a thin plate-like member, and is arranged such that at least one side is in contact with the radiating body. A gap in which cooling air can move is formed between the plurality of heat radiation fins arranged in parallel at a predetermined interval.

  Here, the cooling air around the heat radiating fins flows along the direction orthogonal to the axial direction connecting the heat receiving portion and the heat radiating portion, which is the heat transport path of the heat pipe, on the side close to the heat receiving portion of the heat pipe, It is a relatively cold state that is substantially the same as the outside air temperature. On the other hand, the cooling air has a relatively high temperature due to heat radiation from the heat radiation fins on the side near the heat radiation portion of the heat pipe. Due to this temperature difference, the cooling air around the radiating fins generates natural convection in the axial direction from the heat receiving part side to the heat radiating part side.

  Due to this natural convection, air preferably flows using the gaps between the fins as flow paths, so that the cooling air around the fins is appropriately replaced. By configuring in this way, it is possible to achieve the same effect as when the fin cooling fan is provided in the radiator, and it is possible to improve the heat dissipation efficiency.

  In the aspect in which the disclosed radiator includes a plurality of heat radiation fins, the heat radiation fins are closer to the center portion in consideration of a portion in contact with the flat surface of the heat radiation portion of the heat pipe. The length of stretching from may be long.

  According to this aspect, the fin length of the heat dissipating fin is relatively long in a portion close to the central portion in consideration of a portion in contact with the flat surface of the heat dissipating portion of the heat pipe, and relatively long in a portion far from the contact portion. Becomes shorter. By comprising in this way, the thermal radiation amount from each radiation fin can be equalized, and the improvement of the thermal radiation efficiency as the whole radiator can be implement | achieved.

  In a preferred aspect of the present invention, a plurality of the heat radiating portions are provided, and the plurality of heat radiating portions are arranged such that one flat surface of each heat radiating portion is in contact with the heat radiating body on the same surface.

  According to this aspect, the flat surface of each heat radiation part is arrange | positioned on the same surface. By arranging in this way, the radiator can be brought into contact with the flat surface of each heat-dissipating part of each heat pipe by arranging the heat-dissipating body so as to be in contact with the flat surface of the heat-dissipating part arranged on the same surface. it can. Thereby, it is not necessary to change the shape and arrangement of the heat radiator in accordance with each heat pipe, and a large area of the contact surface between the heat radiator and each heat pipe can be secured.

  In a preferred aspect of the present invention, the heat pipe is bent in a substantially U shape so that the heat pipe has two heat dissipating parts at both ends and a heat receiving part in the bent part, and the base part is bent in the heat receiving part. It has a groove that fits into the part.

  According to this aspect, two different heat transport paths from the heat receiving part to the heat radiating part can be formed in one heat pipe. Specifically, a path from the U-shaped bent part toward one tip and a path toward the other tip are heat transport paths. For this reason, the efficiency of heat transport from the heat receiving part to the heat radiating part can be improved. Moreover, the area of the surrounding surface of the heat pipe which contacts a base part can be increased by fitting the bending part of a heat pipe and the groove | channel of a base part. Therefore, the efficiency of heat conduction from the base portion to the heat receiving portion of the heat pipe can be relatively improved.

As described above, in the aspect including the heat pipe bent in a substantially U shape, the heat pipes are disposed in a partially overlapping positional relationship in plan view, and the plurality of heat pipes are with each bent heat sites contacts one of the groove and the surface of the base portion, even flat surfaces of all of the heat radiating portion contacting with one of said heat radiator have been found provided to be on the same plane Good.

  According to this aspect, by using a plurality of heat pipes, the efficiency of heat transport from the base portion to the radiator can be further improved. Moreover, since each heat pipe is arrange | positioned so that a base part may be contacted via a groove | channel, it can suppress that the calorie | heat amount conducted to several heat pipe is unevenly distributed, and can implement | achieve suitable heat conduction via a contact surface.

  In a preferred aspect of the present invention, the heat pipe has a plurality of at least one of the heat receiving portion and the heat radiating portion, (i) each of the heat receiving portions is in contact with the base portion, and (ii) each of the heat radiating portions. Is bent so as to be in contact with the radiator.

  In this aspect, one or a plurality of heat pipes are bent and contact with the base portion or the heat radiating body at a plurality of portions. By bending the heat pipe in this way, the area of the portion in contact with the base portion is compared with the case where the non-bent tubular heat pipe is in contact with the base portion because of the bent heat receiving portion. growing. Therefore, the efficiency of heat conduction from the base portion to the heat receiving portion of the heat pipe is relatively improved.

  According to the present invention as described above, it is possible to improve the heat transport efficiency of each part of the radiator and realize a suitable heat dissipation efficiency. The operation and other gains of the present invention will be described together with embodiments described later.

It is a side view which shows an example of a structure of the heat radiator which concerns on embodiment. It is a disassembled perspective view which shows an example of a structure of the heat radiator which concerns on embodiment. It is a schematic diagram which shows the shape of a heat pipe. It is a schematic diagram which shows the cross-sectional shape of a heat pipe. It is a schematic diagram which shows the structure of a plate part and a radiation fin. It is a schematic diagram which shows arrangement | positioning of a plate part and a radiation fin. It is a schematic perspective view which shows the heat pipe shape which concerns on the modification of a heat radiator. It is the schematic which shows the heat pipe shape which concerns on the modification of a heat radiator. It is a figure which shows the shape of the modification of a heat pipe.

  A mode for carrying out the present invention (hereinafter referred to as the present embodiment) will be specifically described with reference to the drawings.

(1) Basic Configuration Example First, a basic configuration of an embodiment of a radiator of the present invention (hereinafter referred to as the present embodiment) will be described with reference to FIGS. 1 and 2. 1 and 2 are schematic views showing a basic configuration example of a radiator, in which FIG. 1 is a side view and FIG. 2 is a perspective view.

  As shown in the figure, the radiator 1 according to the present embodiment includes a base portion 10, a heat pipe 20, and a radiator 30. In FIG. 2, the base portion 10, the heat pipe 20, and the heat radiating body 30 are illustrated separately for the description of the structure.

  The base unit 10 is a member that connects the heat generator and the heat pipe 20 and conducts heat from the heat generator to the heat pipe 20. Moreover, the base part 10 has a role as a base which fixes the whole heat radiator to a heat generating body. A part of the base part 10 is a part that is in contact with the heat generating element and plays a role of receiving heat. Preferably, in order to receive heat from the heat generating element, in other words, to improve the efficiency of heat conduction, It is formed in a shape that can ensure a relatively large area. On the other hand, the other part of the base portion 10 is in contact with the heat pipe 20 and serves as a portion that plays a role of conducting heat of the heating element.

  Specifically, as shown in the figure as an example, the base portion 10 is a member having a shape that can easily carry out heat transport from a heating element to a heat pipe, such as a square plate or a disc. . A flat surface is formed on the lower surface of the base portion in the drawing, and receives heat conduction by contacting the heating element 100. On the other hand, a groove 11 is formed on the upper surface in the figure, and the heat pipe 20 is fitted into the groove 11 so as to contact the heat pipe 20.

  The heat pipe 20 is a tubular member in which a volatile hydraulic fluid is enclosed. Preferably, a capillary structure called a wick is formed inside the heat pipe 20, and the working fluid can be moved in any direction by capillary action. According to this configuration, in the heat pipe 20, the working fluid evaporates by absorbing heat generated in one part, and the vaporized working fluid passes through the cavity in the heat pipe and has a relatively low temperature. It moves to the site of and is condensed by cooling. The condensed hydraulic fluid moves through the wick and circulates again to one site. In the heat pipe 20, heat is transported from one part having a relatively high temperature to another part having a relatively low temperature by using such movement accompanying the phase change of the working fluid. Can do.

  Based on the principle as described above, the heat pipe 20 contacts the heat generator at the heat receiving portion, receives heat from the heat generator, contacts the heat radiator at the heat radiating portion, and conducts heat to the heat radiator. Note that the shape and material of the heat pipe 20, the composition of the hydraulic fluid, and the like may be the same as those of a known heat pipe in terms that are not particularly described.

  As shown in FIG. 2, the heat pipe 20 is bent into a U-shape having an angle of 180 degrees at the center, has a heat receiving portion 21 at the bent portion 24, and two heat radiating portions at both ends. 22. The heat receiving portion 21 indicates a connection portion with the base portion 10, and the heat radiation portion 22 indicates a connection portion with the plate portion 31. The heat pipe 20 is fitted into the groove 11 of the base portion 10 at the heat receiving portion 21 and receives heat conduction from the base portion 10 through the contact surface.

  On the other hand, the heat pipe 20 is disposed so as to be in contact with the plate portion 31 at the heat radiating portion 22 and conducts heat transported to the plate portion 31 through the contact surface. The heat radiation portions 22 at both ends of the heat pipe 20 are formed in a flat shape, and have a pair of opposed flat surfaces 23 and two side surfaces connecting the side edges of the flat surfaces 23. For example, in the example shown in FIG. 2, a flat surface 23 that faces the front side in the drawing is formed, and a flat surface (not shown) that faces the flat surface 23 and faces the back side in the drawing is formed.

  With reference to FIG. 3, the structure of the heat pipe 20 in this structural example is demonstrated in detail. FIG. 3 is a schematic diagram of the heat pipe 20 in the present embodiment. In FIG. 3, the heat dissipating portions formed at both ends of the U-shaped heat pipe 20 are shown separately from the heat dissipating portions 22-1 and 22-2 for convenience. Similarly, the flat surfaces 23 formed in the respective heat radiation portions are also expressed as flat surfaces 23-1 and 23-2.

  The flat surface 23-1 of the heat radiating part 22-1 and the flat surface 23-2 of the heat radiating part 22-2 are arranged on the same surface. With this configuration, the flat surface 23-1 of the heat radiating part 22-1 and the flat surface 23-2 of the heat radiating part 22-2 are in contact with the plate part 31 on the same surface. Similarly, the flat surface of the heat radiating part 22-1 that faces the back side in the drawing (not shown) and the flat surface that faces the back side of the heat radiating part 22-2 (not shown) are arranged on the same surface. It contacts the other plate part 31 on the surface.

  In FIG. 4, the example of the cross-sectional shape of the heat pipe 20 is shown. 4A is a cross-sectional shape of a part other than the heat radiation part 22, and FIG. 4B is a schematic diagram showing a cross-sectional shape of the flat heat radiation part 22. As shown in the drawing, the cross-sectional shape of the part other than the heat radiating part 22 is substantially circular, and the cross-sectional shape of the heat radiating part 22 corresponds to the flat surface 23 in the heat radiating part 22 and includes a flat circular portion including opposing linear portions 23 ′. It is.

  Returning to FIG. 1, the description will be continued. The radiator 30 is a specific example of the radiator of the present invention, and is a member that radiates heat received from the heat pipe into the surrounding air. In the present embodiment, the heat radiator 30 includes heat radiating fins 32 in the plate portion 31 for the purpose of increasing the area in contact with the surrounding air.

  As shown in the exploded view of FIG. 2, the plate portion 31 is a set of two plate-like members disposed on both sides of the heat radiation portion 22 of the heat pipe 20. That is, the plate portion 31 has a flat surface 33 in contact with the flat surface 23 of the heat radiating portion 22 of the heat pipe 20, and the flat surface 33 is disposed so as to sandwich the flat surface 23 of the heat radiating portion 22.

  In the specific example shown in FIG. 1 or FIG. 2, the plate portion 31 is fixed in such a manner that the heat pipe 20 is sandwiched between bolts and nuts 31a. In addition to the illustrated example, the plate portion 31 may be fixed in another manner as long as the contact surface with the flat surface 23 of the heat radiation portion 22 of the heat pipe 20 is as large as possible.

  As shown in FIG. 2, a plurality of radiation fins 32 are provided on the other surface of the plate portion 31 that faces the connection surface with the heat pipe 20.

  The radiating fins 32 are a plurality of plate-like members extending from the plate portion 31, receive the heat conducted to the plate portion 31, and radiate it into the surrounding air.

  In FIG. 5, the structural example of the plate part 31 and the radiation fin 32 is shown. FIG. 5A is a diagram showing a configuration in which the plate portion 31 and the radiation fins 32 are combined. FIG. 5B is a diagram showing an example in which the plate portion 31 and the radiation fins 32 are disassembled. is there.

  A configuration example of the plate portion 31 and the radiation fin 32 will be described with reference to FIG. FIG. 5B shows a U-shape having a plate portion 31 and two parallel radiating fins 32 arranged at a predetermined interval, and integrally forming the two radiating fins. A plurality of constituent members 32a to 32g composed of the plate-like members are shown.

  The plate part 31 and the plate parts shown in FIG. 5A are obtained by combining the center parts of the plate-like members of the plurality of component members 32a to 32g so as to overlap each other and fixing the center part with bolts and nuts 34. 31 and the radiation fin 32 can be formed.

  In addition, this structure is an example, For example, as another example, the plate part 31 and the radiation fin 32 may be connected by welding or the like, or may be integrally formed by cutting or the like.

  In the present embodiment, each part of the radiator 1 is preferably made of a material having high thermal conductivity such as copper or aluminum. Further, regarding the heat pipe 20, for example, the parts that are not specially mentioned, such as the shape, material, and composition of the hydraulic fluid, may have the same configuration as that of a known heat pipe.

  According to the radiator 1 described above, the heat from the heating element 100 received by the base portion 10 can be efficiently moved to the radiation fins 32 and radiated to the surrounding air.

  In the radiator 1, the heat receiving portion 21 of the heat pipe 20 is connected to the base portion 10 at a bent portion, so that it is compared with a case where a tubular heat pipe is simply connected perpendicularly to the base portion 10. Thus, the area of the peripheral surface of the heat pipe 20 that comes into contact with the groove 11 of the base portion 10 is increased. Thus, since the area of a contact surface is ensured comparatively large, the improvement of the efficiency of the heat conduction from the base part 10 to the heat pipe 20 is realizable.

  Further, when the heat received by the heat receiving part 21 is transported to the heat radiating part 22, the heat transport efficiency can be improved by transporting the heat to two different heat radiating parts 22-1 and 22-2 through different paths. Specifically, a part of the heat received by the heat receiving part 21 is transported on a path from the heat receiving part 21 to the heat radiating part 22-1 and the other part of the heat is transferred from the heat receiving part 21 to the heat radiating part 22. -2 is transported on the route up to -2. In this way, the heat transport efficiency from the heat receiving part 21 to the heat radiating part 22 can be realized substantially the same heat transport efficiency as when two heat pipes are used.

  In the radiator 1, the heat radiation portion 22 of the heat pipe 20 is formed in a flat shape. For this reason, the area of the contact surface between the heat pipe 20 and the plate portion 31 can be ensured large compared to the case where the heat radiation portion of the heat pipe is not flat, such as when formed in a circular cross section, which is favorable. Heat transport efficiency can be realized.

  According to the configuration of the radiator 1, the direction of the gap between the plurality of radiating fins 32 coincides with the direction in which the end of the bent heat pipe 20 extends, in other words, the direction in which the radiating portion 22 extends. For this reason, the heat received by the heat receiving portion 21 of the heat pipe 20 from the base portion 10 is transported to the heat radiating portion 22 along the extending direction of the heat pipe 20. The cooling air in the gap between the radiation fins 32 is in a cold state close to the outside air temperature on the side near the heat receiving portion 21 in the lower part of FIG. 1, but in the upper part in FIG. Rises.

  Here, the case where the radiator 1 is arranged so that the heat receiving portion 21 of the heat pipe 20 is in the downward direction and the heat radiating portion 22 is in the upward direction will be described. Due to the temperature difference of the air around the radiating fin 32 described above, natural convection from below to above occurs in the gap between the radiating fins 32. Because of the natural convection, the air around the heat radiating fins 32 is exchanged, so that heat radiation from the heat radiating fins 32 can be promoted.

  The radiator 1 may have a configuration in which a device such as a fan is provided to generate forced convection around the radiation fin 32. According to such a configuration, further improvement in heat dissipation efficiency can be realized.

  In the radiator 1, the two plate portions 31 are arranged so as to sandwich the flat portion of the heat pipe 20. According to such a configuration, the contact area between the heat pipe 20 and the plate portion 31 can be increased as compared with the configuration including the single plate portion 31. For this reason, while being able to improve the heat transport efficiency to the plate part 31, it leads to the soaking | uniform-heating of the plate part 31 at the time of the whole, and accelerates | stimulates the thermal radiation from the radiation fin 32 provided in the plate part 31. be able to.

  In addition, the structure provided with the plate part 31 and the radiation fin 32 only in one side of the heat pipe 20 may be sufficient irrespective of the aspect mentioned above. When comprised in this way, the number of components and installation space of the heat radiator 1 whole can be reduced.

  The fin length of the radiating fin 32 of the present embodiment is preferably determined in consideration of the radiating efficiency from each radiating fin 32. Here, the fin length means the length of each radiating fin 32 from the root in contact with the plate portion 31 to the extended tip. Typically, the fin length refers to the protruding length of the fin in the direction orthogonal to the surface of the plate portion 31 where the radiation fin 32 is formed.

  Preferably, the fin length of each radiation fin 32 is the heat conduction path length from the contact part with the heat pipe 20 in the plate part 31 to each radiation fin 32, and the heat conduction path length in each radiation fin 32, that is, The sum with the fin length is determined to be equal. For this reason, the fin length of the radiation fin 32 relatively close to the contact site is relatively long, and the fin length of the radiation fin 32 relatively far from the contact site is relatively short. By comprising in this way, the thermal radiation amount in each radiation fin 32 can be equalized, and each radiation fin 32 can be used effectively. As a result, it is possible to improve the heat radiation efficiency of the heat radiation fin 32 as a whole.

  In addition, in the radiator 1 using the U-shaped heat pipe 20 as described above, the plate portion 31 and the heat pipe 20 may be in contact with each other at a plurality of contact portions.

  The manner of determining the length of each radiation fin 32 when it has a plurality of contact parts in this way will be described with reference to FIG. FIG. 6 is a schematic view of the radiator 1 shown in FIG. 1 as viewed from the top in the drawing.

  In the example shown in FIG. 6, the plate portion 31 and the heat radiation part 22 of the heat pipe 20 are in contact with each other at two contact parts C1 and C2. In the figure, C0 is the center of the contact portions C1 and C2 in the plate portion 31. Regarding such a point C0, in particular, when the area of the plate portion 31 is sufficiently larger than the distance between the contact parts, the heat conduction path length from each contact part to each radiation fin 32 is the point. It can be approximated to the heat conduction path length from C0.

  In the example shown in FIG. 6, the fin length of the radiation fin 32 relatively close to C0 is relatively long, and the fin length of the radiation fin 32 relatively far from C0 is relatively short. More preferably, the fin length of each radiation fin 32 is the sum of the heat conduction path length from the point C0 to each radiation fin 32 and the heat conduction path length in each radiation fin 32, that is, the fin length, The heat radiation fins 32 are determined to be equal. Thereby, the amount of heat radiation in each radiation fin 32 can be made equal.

  Thus, when the heat pipe 20 and the plate part 31 have a plurality of contact parts, the fin length of each radiation fin 32 is determined after comprehensively considering the heat conducted from each contact part.

  Moreover, while considering the heat radiation efficiency, the fin length may be shortened while appropriately adjusting the total area of each fin so as not to increase the size of the radiator 1.

(2) Modified Example Next, a modified example of the radiator of the present invention will be described with reference to FIG. 7 and FIG.

  FIG. 7 is a schematic diagram showing a base 10 and heat pipes 20-1 and 20-2 in a radiator 1 'which is a modified configuration example of the radiator of the present invention. FIG. 8 is a schematic diagram showing a positional relationship between the base 10 and the heat pipes 20-1 and 20-2 in the radiator 1 ′, and FIG. 8A is a cross-sectional view taken along the line AA ′ of FIG. FIG. 8B is a cross-sectional view taken along the line BB ′ of FIG.

  In the example of the basic configuration described above, the radiator 1 including one heat pipe 20 has been described. The radiator 1 'of the modification shown in FIG. 7 includes two heat pipes 20-1 and 20-2.

  As shown in FIGS. 7 and 8A, the heat pipes 20-1 and 20-2 are connected to the base portion by fitting the heat receiving portions into the grooves 11 formed in the base portion 10, respectively. The At this time, the bent portions 24-1 and 24-2 serving as heat receiving portions of the heat pipes 20-1 and 20-2 are parallel to each other in the BB ′ direction in FIG. 7 and in the AA ′ direction in FIG. It is arranged in the groove of the base portion 10 at a slightly shifted position.

  Further, as shown in FIG. 8B, the bent portions 24-1 and 24-2 (in other words, U-shaped root portions) of the heat pipes 20-1 and 20-2 are extending directions of the heat radiating portion. It is bent at predetermined angles θ1 and θ2 with respect to (in other words, both end portions of the U-shape). Due to this bending, the heat pipes 20-1 and 20-2 are adjacent to each other at the connection portion with the base portion 10 in the direction BB ′ in the drawing, that is, in the direction orthogonal to the flat surface of the heat radiation portion. The flat surfaces of the parts are arranged on the same plane. In other words, the bending angle θ1 with respect to the flat surface of the heat radiating portion in the bent portions 24-1 and 24-2 of the heat pipes 20-1 and 20-2 so that the flat surfaces of the heat radiating portion are arranged on the same plane, respectively. θ2 is determined.

  As shown in FIG. 8B, the bottom surface of the groove 11 and the bottom surface of the heat receiving portion 21 of the heat pipes 20-1 and 20-2 facing the bottom surface are both formed as flat surfaces. . For this reason, when fitting the heat pipes 20-1 and 20-2 in the groove 11, the flat surfaces can be brought into surface contact with each other by arranging the flat surfaces in parallel. Therefore, the area of the contact surface between the heat pipe and the base portion can be increased as much as possible, and the efficiency of heat conduction between them can be improved.

  Further, as shown in FIG. 8C, the bottom surface of the heat receiving portion 21 of the heat pipe 20 is not limited to a flat surface, and may be formed so that the bottom surface forms a curved surface. In this case, the bottom surface of the groove 11 is preferably formed in a shape such that both are in surface contact with each other according to the shape of the bottom surface of each heat pipe 20 as shown in FIG. . With this configuration, when the heat pipe 20 is fitted into the groove 11, the bottom surface of the heat receiving portion 21 and the bottom surface of the groove 11 can be brought into surface contact. The bottom surface of the heat receiving portion 21 and the bottom surface of the groove 11 facing the heat receiving portion 21 are not limited to curved surfaces, and may have other shapes as long as the bottom surface of the heat receiving portion 21 and the bottom surface of the groove 11 are in surface contact. Also good.

  In addition, the shape and dimension of the heat pipes 20-1 and 20-2 according to the modification may be the same. Further, in the radiator 1 ′ of the modified example, each configuration described in the basic configuration example may be applied to points other than those specifically described.

  According to the radiator 1 according to the modified example described above, heat transport from the base portion 10 to the plate portion 31 and the radiation fins 32 can be performed with high efficiency using the plurality of heat pipes 20-1 and 20-2. it can. At this time, it is preferable that the flat surfaces 23 of the heat radiation portions of the plurality of heat pipes 20-1 and 20-2 are arranged so as to be in contact with the plate portion 31 on the same surface.

(3) Modification Example of Heat Pipe With reference to FIG. 9, a modification example related to the shape of the heat pipe will be described. FIG. 9 is a view showing the shape of a modified example of the heat pipe 20.

  In the example described above, the heat pipe 20 has a U-shaped bent shape at the heat receiving portion 21, but may be bent to take other shapes.

  For example, the heat pipe may have a shape bent into an L shape like a heat pipe 20a shown in FIG. In such a shape, for example, the L-shaped horizontal portion becomes the heat receiving portion 21a, and the flat heat radiating portion 22a is formed in the L-shaped vertical portion.

  In such a heat pipe 20a, a large contact surface with the peripheral surface of the groove 11 of the base portion 10 can be ensured by the horizontal heat receiving portion 21a. For this reason, compared with the case where only the front-end | tip of the heat receiving part of a tubular heat pipe is fitted in the groove | channel 11, the efficiency of heat conduction can be improved relatively.

  Further, in a radiator using an L-shaped heat pipe, for example, two L-shaped heat pipes may be arranged in combination as shown in FIG. 9B. In the example shown in FIG. 9B, the two L-shaped heat pipes 20b-1 and 20b-2 are opposed to the heat receiving portions 21b-1 and 21b-2, respectively, and the L-shaped orthogonal direction ( They are arranged so as to cross each other in the front-back direction in the figure. More specifically, for example, as shown in FIG. 7, the width of the groove 11 of the base portion 10 is wide enough to fit the heat pipes 20 b-1 and 20 b-2. Further, the heat pipes 20b-1 and 20b-2 are bent at a predetermined angle like the heat pipes 20-1 and 20-2 described above at the boundary between the bent portion and the vertical portion.

  In this way, by using two heat pipes bent in an L shape, heat can be transported through a plurality of paths from the base portion 10 to the heat radiating body 30, and improvement in efficiency can be realized.

  As another aspect of the heat pipe, as shown in FIG. 9 (c), two U-shaped heat pipes are arranged so that the bent horizontal portions (that is, the heat receiving portions) are in tandem. May be. FIG. 9C shows a state in which the U-shaped heat pipes 20c-1 and 20c-2 are arranged in parallel in a column. In addition, about two U-shaped heat pipes 20c-1 and 20c-2 in this way, a part or all of them are L-shaped like the above-described L-shaped heat pipes 20b-1 and 20b-2. You may arrange | position so that it may cross | intersect in an orthogonal direction (front side-back direction in a figure). Moreover, the structure which arrange | positions three or more U-shaped heat pipes in the same order may be sufficient.

  For example, the heat pipe, as the heat pipe 20d shown in FIG. 9 (d), has heat receiving portions 21d at both ends and a flat heat radiating portion 22d at the center, and then a U-shape at the heat radiating portion 22d. The shape may be bent into a mold.

  In such a heat pipe, the heat received in two different heat receiving parts 21d moves on different paths to the heat radiating part 22d. Therefore, similar to the configuration shown in the present embodiment, improvement in heat transport efficiency can be expected.

  Further, the heat pipe may have a W-shaped shape like a heat pipe 20e shown in FIG. In such a shape, for example, a flat heat radiation portion 22e is formed at the central bent portion and both end portions, and the other two bent portions in the lower part of the figure serve as the heat receiving portion 21e.

  In this way, by bending one heat pipe 20 and connecting to the base portion 10 or the plate portion 31 at the plurality of heat receiving portions 21 and the heat radiating portions 22, the heat received from the base portion 10 is different up to the plate portion 31. It becomes possible to transport by a plurality of routes. At this time, by providing the heat receiving portion 21 or the heat radiating portion 22 in the bent portion, a larger area of the contact surface with the base portion 10 or the plate portion 31 can be ensured, and further improvement in heat transport efficiency is realized. it can.

  Further, as another modification of the heat pipe 20 (not shown), a so-called V-shaped shape in which a U-shaped bent portion is bent at an acute angle may be used. In addition, as long as the above-described effects can be expected, the shape when the heat pipe 20 is bent may be appropriately set.

(4) Other Embodiments The present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit or idea of the invention that can be read from the claims and the entire specification. A radiator with various modifications is also included in the technical scope of the present invention.

  For example, in the above-described embodiment, the shape of the base portion enables contact with the heat generating elements of various shapes, and the back surface of the base portion, that is, the contact with the heat generating elements so that the area of the contact surface can be secured as much as possible. The part was formed with a flat surface. However, the present invention is not limited to such an embodiment, and the shape of the back surface of the base portion can be processed into an arbitrary shape so that the area of the contact surface becomes as large as possible according to the shape of the heating element. .

  In addition, the contact portion with the heat pipe, which is the surface of the base portion, preferably has a shape that can ensure a relatively large area of the contact surface with the heat pipe in order to improve the efficiency of heat conduction to the heat pipe. Preferably there is. Therefore, the shape on the surface side of the base portion is provided with a groove or a hole for attachment according to the shape of the heat pipe in order to ensure a large contact surface with the heat pipe that is typically tubular. Although it is preferable, of course, the present invention is not limited to this mode, and a configuration in which the heat pipe is directly attached to the smooth surface of the base portion can also be employed.

  The radiator 1 described in the present embodiment has a configuration in which the heat radiation portion 22 of the heat pipe 20 has a pair of opposed flat surfaces 23 and the two heat radiators 30 are arranged so as to sandwich the heat pipe 20. is there.

  Unlike such a configuration, a configuration in which one heat radiator contacts the heat pipe 20 may be used. By comprising in this way, the space which the heat radiator 30 occupies can be reduced. In addition to the configuration using two heat radiators, a configuration using more heat radiators may be applied. By comprising in this way, it becomes possible to ensure the area of the contact surface of a heat pipe and a thermal radiation body larger, and can further improve the thermal radiation efficiency in the whole heat radiator.

1 radiator,
10 Base part,
11 groove,
20 heat pipe,
21 heat receiving part,
22 heat dissipation part,
23 flat surface (heat dissipation part),
30 radiator 31 plate part,
32 Radiation fin 33 Flat surface (plate part)
100 heating element.

Claims (8)

A base for receiving heat from the heating element;
A plate portion made of a plate-like member, and a plurality of heat dissipating fins connected to the plate portion, and a heat dissipating member for radiating heat,
And a heat pipe having two or more heat dissipation area of contact with the heat receiving portion in contact with the base portion, and the radiator,
Each of the two or more heat radiation portions has a flat shape having a first flat surface in contact with the heat radiator,
The plate portion has a second flat surface in contact with the first flat surface of the heat dissipation portion,
The plurality of heat radiation fins are relatively longer as the distance from the center line between the two or more first flat surfaces is shorter in a state where the heat radiator is in contact with the heat pipe, and the distance from the center line. A radiator that is provided to be relatively shorter as the distance is longer.   2. The radiator according to claim 1, wherein the plurality of radiation fins are provided such that a sum of a distance from the center line and a length of the radiation fins is equal to each other. Provided with a plurality of the radiators,
The heat radiator according to claim 1 or 2, wherein the plurality of heat dissipators are arranged so as to be in contact with the first flat surface of the heat dissipating part from different directions.   The plurality of radiating fins are arranged in parallel with a direction orthogonal to an axial direction connecting the heat receiving part and the heat radiating part, which is a heat transport path of the heat pipe, as an arrangement direction. The heat radiator as described in any one of 1-3. 5. The heat dissipation according to claim 1, wherein a first flat surface of each of the two or more heat dissipating portions in contact with one heat dissipating member is disposed on the same surface. vessel. The heat pipe is bent into a substantially U shape so as to have two heat dissipating parts at both ends and a heat receiving part at the bent part,
The radiator according to claim 5, wherein the base portion has a groove that fits into the bent heat receiving portion. Having a plurality of the heat pipes arranged under a positional relationship partially overlapping in plan view,
The plurality of heat pipes are:
Each of the bent heat receiving portions is in surface contact with one groove of the base portion, and the first flat surfaces of all the heat radiating portions in contact with one heat radiator are provided on the same surface. The heat radiator according to claim 6.   The heat pipe has a plurality of at least one of the heat receiving portion and the heat radiating portion, (i) each of the heat receiving portions is in contact with the base portion, and (ii) each of the heat radiating portions is in contact with the heat radiating body. The radiator according to any one of claims 1 to 5, wherein the radiator is bent.

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