JP7338555B2 - cooling structure - Google Patents

Description

The present invention relates to a cooling structure for cooling heat generating parts of various devices.

Some cooling structures are configured as follows. That is, the cooling structure has a heat-generating part having a heat-generating body, a heat-dissipating part whose temperature is lower than that of the heat-generating part, and a heat conductor interposed between the heat-generating part and the heat-radiating part. The heat transfer body has a frame and a plurality of fins projecting from the frame in a cantilever manner and standing obliquely with respect to the frame. The frame is in contact with the heat radiating section, and the tip of each fin is in contact with the heat generating section. Therefore, the heat transfer body transfers heat generated in the heat generating portion to the heat dissipating portion through the fins and the frame. As a document showing such a technique, there is the following Patent Document 1.

JP-A-10-260230

In the cooling structure described above, it is preferable to install a large number of fins in the direction in which the fins are arranged side by side in order to improve the heat transfer performance of the heat transfer body. This is because the total contact area between the heat radiating portion and all the fins can be increased by providing a large number of fins in the parallel direction.

However, there is a limit to increasing the number of fins in the above heat transfer body in the direction in which they are arranged in parallel for the following reasons. That is, the above heat transfer body is formed by punching out a frame and a plurality of fins from a single plate, which is a prototype of the heat transfer body, and raising the fins by bending. Therefore, in the above-described heat transfer body, fins having an area within a range that can be accommodated in one plate at the maximum can be formed. Therefore, when trying to increase the number of fins in the direction in which they are arranged, it is necessary to shorten the projection length of the fins.

However, if the projection length of the fins is shortened, the spring constant when the fins are bent increases, making it difficult to secure a tightening margin (that is, a bending margin) with low repulsion. If it becomes difficult to secure an interference with low repulsion, it becomes difficult to deal with variations in the distance between the heat-generating portion and the heat-radiating portion due to differences in standards, dimensional accuracy, and the like.

The present invention has been made in view of the above circumstances, and a main object of the present invention is to make it possible to achieve both securing of interference with low resilience and improvement of heat transfer performance.

A cooling structure of the present invention includes a heat generating section having a heat generating body, a heat radiating section whose temperature is lower than that of the heat generating section, and a heat conductor interposed between the heat generating section and the heat radiating section. Hereinafter, the size direction of the spacing is defined as the spacing direction, and a predetermined direction crossing the spacing direction is defined as the side-by-side direction. A plurality of fins are arranged side by side in the side-by-side direction on the heat transfer body.

A plurality of the heat conductors are interposed between the heat generating section and the heat radiating section in a mutually overlapping state. Thereby, the fins of the other heat transfer body are arranged between the fins of one heat transfer body when viewed in a direction orthogonal to both the spacing direction and the side-by-side direction. The cooling structure transfers the heat of the heat generating section to the heat radiating section by the fins of the heat transfer bodies.

According to the present invention, a plurality of heat conductors are interposed between the heat-generating part and the heat-radiating part in an overlapping state. Thereby, the fins of another heat transfer body are arranged between the fins of one heat transfer body. Therefore, many fins can be installed in the side-by-side direction. These fins transmit the heat of the heat generating section to the heat radiating section. Therefore, heat transfer performance can be improved.

In this configuration, by stacking a plurality of heat transfer bodies, a large number of fins are arranged in parallel. There is no need to reduce the dimension of the peripheral portion in the direction in which the fins are arranged side by side. Therefore, it becomes easy to secure the interference of the heat transfer body with low repulsion.

As described above, according to the present invention, it is possible to achieve both securing of interference with low repulsion and improvement of heat transfer performance.

Side cross-sectional view showing the cooling structure of the first embodiment Side cross-sectional view showing two heat transfer bodies and their surroundings Side cross-sectional view showing a heat transfer body Bottom view showing heat transfer element Side sectional drawing which shows the cooling structure of 2nd Embodiment Side cross-sectional view showing a state in which two heat transfer bodies are separated Side cross-sectional view showing the cooling structure of the third embodiment Side cross-sectional view showing two heat transfer bodies and their surroundings Side cross-sectional view showing a state in which two heat transfer bodies are separated A perspective view showing two heat transfer bodies The perspective view which shows the state which separated the heat transfer body of 2 sheets. Perspective view showing the prototype of the heat transfer body Perspective view showing a heat transfer body Side cross-sectional view showing a state in which two heat transfer bodies are arranged in parallel with the fins. Bottom view of the heat transfer body of FIG. 14 viewed from below Front sectional view showing the cooling structure of the fourth embodiment A perspective view showing two heat transfer bodies The perspective view which shows the state which separated the heat transfer body of 2 sheets.

Next, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments, and can be modified as appropriate without departing from the gist of the invention.

[First embodiment]
First, the gist of this embodiment will be described. As shown in FIG. 1, the cooling structure 91 is interposed between the heat generating portion 20 having the heat generating body 25, the heat radiating portion 40 having a lower temperature than the heat generating portion 20, and the gap g between the heat generating portion 20 and the heat radiating portion 40. It has two heat transfer bodies 30 having the same shape.

In the following, according to the drawings, the direction of the size of the gap g is referred to as the "vertical direction Z", the predetermined direction orthogonal to the vertical direction Z is referred to as the "front-rear direction Y", and the direction orthogonal to both the vertical direction Z and the front-rear direction Y. is "horizontal direction X". In the vertical direction Z, the side of the heating unit 20 is defined as "upper", and the side of the heat radiating unit 40 is defined as "lower". One of the longitudinal directions Y is defined as "front" and the other is defined as "rear". One of the horizontal directions X is defined as "left" and the other is defined as "right".

However, the cooling structure 91 may be installed with the top facing down, installed with the vertical direction Z described below horizontal, or installed with the front facing backward. It can be installed in any direction, such as installation with the direction Y set to the left and right, or installation with the left referred to below as the right.

As shown in FIG. 4, each heat transfer body 30 includes a rectangular plate frame-shaped frame 31 that is wide in the lateral direction X and the front-rear direction Y, and a plurality of heat transfer members protruding downward from the frame 31 as shown in FIG. and fins 36 . The plurality of fins 36 are arranged in parallel at least in the front-rear direction Y. As shown in FIG. Two fins 36 arranged in the front-rear direction Y of each heat transfer body 30 have an inverted V shape when viewed in the lateral direction X. As shown in FIG. That is, the front fin 36 of the two fins 36 projects diagonally forward and downward from the frame 31 , and the rear fin 36 projects diagonally rearward and downward from the frame 31 . As a result, a plurality of inverted V-shaped fins 36 each having two fins 36 are formed side by side in the front-rear direction Y on each heat transfer body 30 . Hereinafter, the inner side (folding direction side) of the inverted V-shaped fin 36 is referred to as "inner side surface 362", and the outer side (opposite side to the bending direction) is referred to as "outer side surface 361".

As shown in FIG. 2 , the two heat transfer bodies 30 overlap each other in the vertical direction Z, and the fins 36 of the lower heat transfer body 30 are attached to the inner surfaces 362 of the fins 36 of the upper heat transfer body 30 . are in contact with each other. Therefore, when viewed in the lateral direction X, the two front and rear inverted V-shaped fins 36 of the lower heat transfer body 30 are positioned between the two front and rear inverted V-shaped fins 36 of the upper heat transfer body 30 . are distributed. Two of the fins 36 of the upper heat transfer body 30 are arranged between two inverted V-shapes adjacent to each other in the front-rear direction Y of the lower heat transfer body 30 . That is, in FIG. 2, the fins 36 forming the right half of the left inverted V shape of the lower heat transfer body 30 and the left half of the right inverted V shape of the lower heat transfer body 30 are The fins 36 forming the right half of the left inverted V shape of the upper heat transfer body 30 and the left half of the right inverted V shape of the upper heat transfer body 30 are formed between the fins 36 . fins 36 are arranged. As a result, when viewed in the lateral direction X, the fins 36 of the lower heat conductor 30 are arranged between the fins 36 of the upper heat conductor 30, and the fins 36 of the lower heat conductor 30 are arranged between the fins 36 of the upper heat conductor 30. The fins 36 of the upper heat transfer body 30 are arranged between them.

The top surface of the frame 31 of the upper heat transfer element 30 contacts the lower surface of the heat generating element 25 , and the inner surface 362 of each fin 36 of the upper heat transfer element 30 contacts the outer surface of the fins 36 of the lower heat transfer element 30 . It is in contact with the side surface 361 . On the other hand, the lower heat transfer body 30 contacts the inner side surfaces 362 of the fins 36 of the upper heat transfer body 30 while the outer side surfaces 361 of the fins 36 of the lower heat transfer body 30 contact the inner side surfaces 362 of the fins 36 of the upper heat transfer body 30 . It is in contact with the heat body 30 .

Therefore, the cooling structure 91 transfers the heat of the heat generating section 20 to the heat radiating section 40 through the frame 31 and the fins 36 of the heat transfer body 30 on the upper side and the fins 36 of the heat transfer body 30 on the lower side. Then, the inner side surface 362 of the fin 36 of the upper heat transfer body 30 and the outer side surface 361 of the fin 36 of the lower heat transfer body 30 are in contact with each other, and the two fins 36 are overlapped with each other. Heat transfer performance is improved by using the cross section of the fins 36 of the sheet of heat transfer body 30 as a heat dissipation path.

Next, the details of the present embodiment will be described by supplementing the essential configuration of the present embodiment described above.

FIG. 1 is a side cross-sectional view of the cooling structure 91 viewed in the lateral direction X. FIG. The cooling structure 91 has a housing that accommodates the heat generating section 20 and the heat conductor 30 inside. The housing is composed of an upper cover 10 and the above-described heat radiating section 40 as a lower cover. The heating part 20 is composed of a substrate 22 and a heating element 25 mounted on the lower surface of the substrate 22 . The heating element 25 is arbitrary, but examples thereof include a semiconductor such as gallium nitride. A coolant path 44 for flowing a coolant is provided in the heat radiating portion 40 . The coolant passage 44 may be, for example, a water passage through which cooling water flows, or a passage through which gas flows.

FIG. 2 is a side cross-sectional view of two upper and lower heat transfer bodies 30 and their surroundings viewed in the horizontal direction X. As shown in FIG. Each of the upper and lower heat conductors 30 is a thermal interface material or the like, and is made of metal such as aluminum or copper in this embodiment. The upper and lower heat transfer bodies 30 have the same shape as described above. Therefore, in a state in which the inner side surfaces 362 of the fins 36 of the upper heat transfer body 30 are in contact with the outer side surfaces 361 of the fins 36 of the lower heat transfer body 30, the frame 31 of the upper heat transfer body 30 is A slight gap is formed between the lower surface and the upper surface of the frame 31 of the lower heat transfer body 30 .

FIG. 3 is a side sectional view showing each heat transfer body 30, and FIG. 4 is a bottom view of the heat transfer body 30 viewed from below. The fins 36 are arranged side by side in the front-rear direction Y, and are also arranged side by side in the lateral direction X. As shown in FIG. The fins 36 arranged in the horizontal direction X have the same shape. On the other hand, one and the other of the two front and rear fins 36 forming an inverted V shape are symmetrical in the front-rear direction Y. As shown in FIG.

Hereinafter, the effect related to the implementation of claim 1 as originally filed is referred to as the first effect, the effect related to the implementation of claim 2 as originally filed is referred to as the second effect, and so on. 10 are referred to as third to tenth effects, respectively.

According to this embodiment, the following first effect is obtained. As shown in FIG. 2, two heat transfer bodies 30 are interposed between the heat generating section 20 and the heat dissipating section 40 so as to overlap each other. As a result, when viewed in the lateral direction X, the fins 36 of another heat transfer body 30 are arranged between the fins 36 of one heat transfer body 30 . Therefore, many fins 36 can be installed in the front-back direction Y. FIG. The fins 36 transmit the heat of the heat generating section 20 to the heat radiating section 40 . Therefore, heat transfer performance can be improved.

In this configuration, by stacking the two heat transfer bodies 30 one on top of the other, many fins 36 are installed in the front-rear direction Y. It is not necessary to reduce the dimension of each fin 36 and its peripheral portion in the front-rear direction Y, unlike the case where the fins 36 are arranged side by side. Therefore, it becomes easy to secure the interference of the heat transfer body 30 with low repulsion.

As described above, according to the present embodiment, it is possible to achieve both securing of interference with low repulsion and improvement of heat transfer performance.

[Second embodiment]
Next, a second embodiment will be described. In the following embodiments, members that are the same as or correspond to those in the previous embodiments are denoted by the same reference numerals. However, the cooling structure itself is given a different reference numeral depending on the embodiment. This embodiment will be described based on the first embodiment, focusing on points that differ from this.

FIG. 5 is a side cross-sectional view of the two heat transfer bodies 30 of the cooling structure 92 of the present embodiment and their surroundings viewed in the horizontal direction X, and FIG. It is a side cross-sectional view showing a separated state.

As shown in FIG. 6, the upper heat transfer body 30 and the lower heat transfer body 30 have slightly different shapes. Specifically, the interval in the front-rear direction Y between each two inverted V-shaped fins 36 of the upper heat transfer body 30 is slightly larger than that of the lower heat transfer body 30 . As a result, as shown in FIG. 5 , the two inverted V-shaped fins 36 of the lower heat conductor 30 are positioned inside the two inverted V-shaped fins 36 of the upper heat conductor 30 . is settled. The upper surface of the frame 31 of the lower heat transfer body 30 is in contact with the lower surface of the frame 31 of the upper heat transfer body 30 .

5, the inner surface 362 of the upper fin 36 is in contact with the outer surface 361 of the lower fin 36, but the inner surface 362 of the upper fin 36 and the outer surface 361 of the lower fin 36 A gap may be formed between

In a state in which the two heat conductors 30 are interposed in the space g between the heat generating part 20 and the heat radiating part 40, the downward protrusion length of each fin 36 of the upper heat conductor 30 is , is longer than the downward projection length of each fin 36 of the lower heat transfer body 30 by the thickness T of the frame 31 of the lower heat transfer body 30 . As a result, the lower end of each fin 36 of the lower heat conductor 30 abuts the upper surface of the heat radiating section 40 , and the lower end of each fin 36 of the upper heat conductor 30 also abuts the upper surface of the heat radiating section 40 . .

With the above configuration, the upper heat transfer element 30 has the upper end of each of its fins 36 in contact with the lower surface of the heat generating part 20 via its own frame 31, and the lower end of each of its own fins 36 dissipating heat. It is in direct contact with the upper surface of the portion 40 . On the other hand, the upper end of each fin 36 of the lower heat transfer body 30 abuts on the lower surface of the heat generating part 20 via its own frame 31 and the frame 31 of the upper heat transfer body 30 . A lower end portion of each fin 36 is in direct contact with the upper surface of the heat radiating portion 40 . As described above, each fin 36 of each heat transfer body 30 is in contact with each of the heat generating portion 20 and the heat radiating portion 40 directly or via the frame 31 .

According to this embodiment, the following second effect is obtained. As described above, each fin 36 of each heat transfer body 30 is in contact with each of the heat generating portion 20 and the heat radiating portion 40 either directly or via the frame 31 . Therefore, each fin 36 of each heat transfer body 30 has a portion in direct contact with the heat generating part 20 without interposing the fins 36 of the other heat transfer body 30 and the fin 36 of the other heat transfer body 30. and a portion in direct contact with the heat radiating portion 40 without intervening. Therefore, as shown in FIG. 2, each fin 36 of the upper heat transfer body 30 contacts the upper surface of the heat radiating part 40 via the fins 36 of the lower heat transfer body 30, and the lower heat transfer body 30 The heat transfer performance can be improved compared to the first embodiment in which the fins 36 of the upper heat transfer body 30 are in contact with the lower surface of the heat generating part 20 via the fins 36 of the upper heat transfer body 30 .

[Third Embodiment]
Next, a third embodiment will be described. This embodiment will be described based on the second embodiment, focusing on points that differ from this.

First, the gist of this embodiment will be described. As shown in FIG. 8 , two heat conductors 30 having the same shape are interposed in the gap g between the heat generating portion 20 and the heat radiating portion 40 .

As shown in FIG. 11, each heat transfer element 30 includes a frame 31 having a rectangular plate frame shape that is wide in the lateral direction X and the front-rear direction Y, a plurality of fins 36 arranged side by side inside the frame 31, and a plurality of spring portions 35 . Each fin 36 has a rectangular plate-like shape and is arranged side by side in the front-rear direction Y in two rows in the lateral direction X. As shown in FIG.

Two fins 36 aligned in the horizontal direction X, that is, the left fin 36 and the right fin 36 are connected by a connecting spring portion 37 . The plurality of spring portions 35 are arranged on both sides in the horizontal direction X of each two fins 36 aligned in the horizontal direction X, and both ends of the two fins 36 aligned in the horizontal direction X support. That is, the spring portion 35 arranged on the left side of the left fin 36 supports the left end portion of the left fin 36 with its right end portion. The spring portion 35 arranged on the right side of the right fin 36 supports the right end portion of the right fin 36 with its left end portion.

Thus, the left fin 36 has its left end supported by the left spring portion 35 and its right end supported by the right spring portion 35 via the connecting spring portion 37 and the right fin 36 . The right fin 36 has its right end supported by the right spring portion 35 and its left end supported by the left spring portion 35 via the connecting spring portion 37 and the left fin 36 .

The frame 31 supports the ends of the spring portions 35 in the lateral direction X opposite to the fin 36 side, that is, the left ends of the left spring portions 35 and the right ends of the right spring portions 35 . Each fin 36 is supported via the spring portion 35 by supporting the . The frame 31 of each of the two heat transfer bodies 30 is provided with a plurality of positioning holes 32 passing through the frame 31 in the vertical direction Z for positioning the heat transfer bodies 30 in the lateral direction X and the front-rear direction Y. ing.

Hereinafter, for each heat transfer body 30, the two widest front and back surfaces of the frame 31 are referred to as "first frame surface S1" and "second frame surface S2". Then, as shown in FIG. 9, the projection length in the vertical direction Z of the fins 36 from the first frame surface S1 to the front side is defined as "first projection length L1", and the projection length from the second frame surface S2 to the front side is defined as "first projection length L1". The projection length of the fin 36 in the vertical direction Z is defined as "second projection length L2". A state in which no external force is applied to each heat transfer body 30 is defined as a “natural state”. In each of the two heat transfer bodies 30, in the natural state, the first protrusion length L1 is longer than the second protrusion length L2 by the thickness T of the frame 31 or more.

Then, as shown in FIG. 10, the two heat transfer bodies 30 overlap each other in a face-to-face state in which the first frame surfaces S1 are in contact with each other. 10, the positioning holes 32 of one heat transfer body 30 are communicated with the positioning holes 32 of the other heat transfer body 30 in the facing state, as shown in FIG. The heat transfer body 30 is configured so that all the fins 36 of the heat transfer body 30 are arranged in the front-rear direction Y at an equal pitch P in the fin row of the fins 36 . In this state, the two heat transfer bodies 30 are positioned in the horizontal direction X and the front-rear direction Y by inserting predetermined inserting bodies 39 such as pins and screws into the communicating sets of positioning holes 32 respectively. It is

Hereinafter, as shown in FIG. 11, the direction of rotation about the horizontal direction X will be referred to as the "horizontal axis direction R". Moreover, below, let the widest surface of the fin 36 be "36 s of fin surfaces." Each fin surface 36s is inclined in the direction R around the horizontal axis with respect to the frame surfaces S1 and S2.

Hereinafter, the direction orthogonal to the horizontal direction X along the fin surface 36s, that is, the direction along the fin surface 36s in the vertical direction Z side and diagonally with respect to the vertical direction Z will be referred to as the “vertical direction Zy”. . Each fin 36 is longer in the lateral direction X than in the longitudinal direction Zy.

As shown in FIG. 8 , in each heat transfer body 30 , the elastic force of the spring portion 35 urges the fin 36 in the direction R around the horizontal axis, so that one end of the fin 36 in the vertical direction Zy moves toward the heat generating portion 20 . , and the other end of the fin 36 in the vertical direction Zy is pressed against the heat radiating portion 40 .

In a state in which each heat conductor 30 is interposed between the heat generating portion 20 and the heat radiating portion 40, the first projection length L1 shown in FIG. 9 is longer than the second projection length L2. is longer by the thickness T of the . As a result, as shown in FIG. 8, the length (L1-T) by which the fins 36 of each heat transfer body 30 protrude in the vertical direction Z from the second frame surface S2 of the heat transfer body 30 of the other party is defined as the second protrusion. The length is aligned to L2. As a result, both ends in the vertical direction Zy of each fin 36 of each of the two heat transfer bodies 30 are in contact with the lower surface of the heat generating section 20 and the upper surface of the heat radiating section 40 without difficulty and stably.

Next, the details of the present embodiment will be described by supplementing the essential configuration of the present embodiment described above.

FIG. 7 is a side cross-sectional view of the cooling structure 93 viewed in the lateral direction X. FIG. FIG. 8 is a partially enlarged view of FIG. 7, and more specifically, a side cross-sectional view of two heat transfer bodies 30 and their surroundings viewed in the horizontal direction X. As shown in FIG. FIG. 9 is a side cross-sectional view showing a state in which the two heat transfer bodies 30 are vertically separated from the state shown in FIG. FIG. 10 is a perspective view showing two heat transfer bodies 30. FIG. FIG. 11 is a perspective view showing a state in which the two heat transfer bodies 30 are vertically separated from the state shown in FIG.

As shown in FIG. 11, each of the spring portion 35 and the connecting spring portion 37 has a rod-like shape whose longitudinal direction is the lateral direction X. As shown in FIG. The plurality of spring portions 35 have the same shape, and the plurality of connecting spring portions 37 have the same shape. In the drawing, each spring portion 35 and each connecting spring portion 37 have a square prism shape, but they may have other shapes such as a columnar shape. The quadrangular prism shape has the advantage of facilitating processing. On the other hand, if it is cylindrical, there is an advantage that the force can be applied evenly around the center line.

The spring portion 35 and the connecting spring portion 37 of the upper heat transfer body 30 support the ends of the fins 36 adjacent to each other in the lateral direction X slightly above the substantially central portion in the longitudinal direction Zy. On the other hand, the spring portion 35 and the connecting spring portion 37 of the lower heat transfer body 30 support the ends of the adjacent fins 36 in the horizontal direction X slightly lower than the substantially central portion in the vertical direction Zy. are doing. In each of the upper and lower heat transfer bodies 30, the cross-sectional area of the spring portion 35 viewed in the lateral direction X and the cross-sectional area of the connecting spring portion 37 viewed in the lateral direction X are the same as those of the fin 36 viewed in the lateral direction X. smaller than the cross-sectional area of the Therefore, the stress (elastic force) generated in the spring portion 35 and the connecting spring portion 37 is as follows.

That is, the stress generated in the spring portion 35 when one end of the spring portion 35 in the horizontal direction X is twisted with respect to the other end in the direction R around the horizontal axis by a predetermined angle from the natural state is The stress generated in the fins 36 when one end of the length section of the spring portion 35 that is the same as the length in the horizontal direction X is twisted at the predetermined angle in the direction R around the horizontal axis with respect to the other end of the length section small.

Further, when one end of the connecting spring portion 37 is twisted with respect to the other end by a predetermined angle in the direction R around the horizontal axis from the natural state, the stress generated in the connecting spring portion 37 is It is smaller than the stress generated in the fin 36 when one end of the length section equal to the length of the lateral direction X of the portion 37 is twisted at the predetermined angle in the direction R around the lateral axis with respect to the other end of the length section. .

FIG. 12 is a perspective view showing a prototype of the heat transfer body 30. FIG. A prototype of the heat transfer body 30 shown in FIG. 12 is formed by punching a predetermined metal plate using a press or the like. The prototype of the heat transfer body 30 has a frame 31 , positioning holes 32 , spring portions 35 and fins 36 . In the prototype of this heat conductor 30, the fin surfaces 36s are parallel to the frame surfaces S1 and S2. From this state, the spring portion 35 is bent so that the fin surfaces 36s are inclined with respect to the frame surfaces S1 and S2, thereby completing the heat transfer body 30 shown in FIG.

FIG. 14 is a side cross-sectional view showing a state in which two heat transfer bodies 30 are arranged in the front-rear direction Y. As shown in FIG. From this state, when one heat transfer body 30 is reversed in the front-rear and up-down directions and superimposed on the other heat transfer body 30 as indicated by the dashed line, the facing state described above is obtained.

FIG. 15 is a plan view of the lower heat transfer body 30 viewed from directly above. In this embodiment, the rows r1 and r2 of the fins 36 arranged in the front-rear direction Y are spaced apart in the front-rear direction Y. As shown in FIG. Hereinafter, the front end fins 36 in each of the front and rear two rows r1 and r2 are simply referred to as "front end fins 36", and the rear end fins 36 in each of the front and rear two rows r1 and r2 are referred to as "rear end fins 36". "end fin 36".

The pitch (2P) in the front-rear direction Y of the fins 36 in each row r1, r2 of one heat transfer body 30 is the pitch in the front-rear direction Y of the fins 36 in the two heat transfer bodies 30 in the overlapping state. Twice P. Between the fin 36 at the front end and the frame 31 in front thereof, a front-to-rear space Q larger than at least the pitch P is provided.

In the face-to-face state, the upper heat transfer body 30, that is, the lower heat transfer body 30 is reversed in the front-rear and up-down directions at the front-back distance Q of the lower heat transfer body 30 shown in FIG. The fins 36 at the front end of the heat transfer member 30 are arranged, and the fins 36 at the rear end of the heat transfer member 30 on the lower side are arranged at the front-rear interval Q of the heat transfer member 30 on the upper side in the inverted state. As a result, interference between the frame 31 of the lower heat transfer body 30 and the front end fins 36 of the upper heat transfer body 30 is avoided, and the rear end fins 36 of the lower heat transfer body 30 are prevented from interfering with each other. , the interference with the frame 31 of the upper heat transfer body 30 is avoided.

This embodiment also provides the first and second effects described above. Furthermore, the following third effect is also obtained. As shown in FIG. 8 , in the fin row composed of the fins 36 of the two overlapping heat transfer bodies 30 , all the fins 36 are arranged in the front-rear direction Y at an equal pitch P. As shown in FIG. Therefore, the heat transfer performance can be improved substantially uniformly in the front-rear direction Y without bias.

In addition, the following fourth effect can also be obtained. As shown in FIG. 11 , both ends of each fin 36 in the horizontal direction X are supported by spring portions 35 . Both ends of the fin 36 in the vertical direction Zy are pressed against the heat generating portion 20 and the heat radiating portion 40 by the elastic force of the spring portion 35 . The elastic force can be suppressed by thinning or lengthening the spring portion 35 regardless of the configuration of the fins 36 such as the length of the fins 36 in the vertical direction Zy. By suppressing the elastic force of the spring portion 35, the interference of the heat transfer body 30 can be ensured with low repulsion.

Therefore, by suppressing the elastic force of the spring portion 35, the fins 36 are configured to be advantageous in heat transfer, such as by shortening the fins 36 in the vertical direction Zy while securing the interference of the heat transfer body 30 with low repulsion. can be Therefore, also by the above, it is possible to achieve both securing of interference with low repulsion and improvement of heat transfer performance.

Moreover, the following fifth effect is also obtained. The fins 36 are longer in the horizontal direction X than in the vertical direction Zy. Therefore, the heat transfer distance can be efficiently shortened, and the contact area between the heat transfer body 30 and the heat generating part 20 and the contact area between the heat transfer body 30 and the heat radiation part 40 can be increased. Therefore, the heat transfer performance of the heat transfer body 30 is improved.

Moreover, the following sixth effect is obtained. By supporting each spring portion 35 , the frame 31 supports each fin 36 via the spring portion 35 . Therefore, the plurality of fins 36 can be put together by the frame 31 .

In addition, the following seventh effect is obtained. As shown in FIG. 8, the two heat transfer bodies 30 are in a state in which the plurality of positioning holes 32 of one heat transfer body 30 are in communication with the positioning holes 32 of the other heat transfer body 30. The two heat transfer bodies 30 are positioned in the front-rear direction Y and the lateral direction X by inserting predetermined inserting bodies 39 through the communicating sets of positioning holes 32 . Therefore, the two heat transfer bodies 30 can be easily positioned.

Moreover, the following eighth effect is obtained. When the two heat transfer bodies 30 face each other and the positioning holes 32 of one heat transfer body 30 communicate with the positioning holes 32 of the other heat transfer body 30, the two heat transfer bodies 30 are aligned. In the fin row composed of the fins 36, all the fins 36 are arranged in the front-rear direction Y at an equal pitch P. As shown in FIG. Therefore, the fins 36 of the two heat transfer bodies 30 can be arranged at an equal pitch P in the front-rear direction Y simply by making the two heat transfer bodies 30 face each other and allowing the positioning holes 32 to communicate with each other.

In addition, the following ninth effect is obtained. As shown in FIG. 10, the two heat transfer bodies 30 overlap each other in a face-to-face state in which the first frame surfaces S1 are in contact with each other. In a state in which each heat conductor 30 is interposed between the heat generating portion 20 and the heat radiating portion 40, the first projection length L1 shown in FIG. 9 is longer than the second projection length L2. It is long by the thickness T. Therefore, the length (L1-T) by which the fins 36 of each heat transfer body 30 protrude from the second frame surface S2 of the heat transfer body 30 of the other heat transfer body 30 in the vertical direction Z can be aligned with the second protrusion length L2. Therefore, as shown in FIG. 8, all the fins 36 of the two heat transfer bodies 30 can be brought into contact with the lower surface of the heat generating portion 20 and the upper surface of the heat radiating portion 40 without difficulty.

In addition, the following effects are obtained. As shown in FIG. 11 , a plurality of fins 36 are arranged side by side in the horizontal direction X, and fins 36 adjacent to each other in the horizontal direction X are connected via a connecting spring portion 37 . Therefore, for example, the interval g between the heat generating portion 20 and the heat radiating portion 40 is not uniform. Even when the intervals of the portions corresponding to 36 are different from each other, it can be dealt with by bending (twisting) the connecting spring portion 37 .

[Fourth Embodiment]
Next, a fourth embodiment will be described. This embodiment will be described based on the third embodiment, focusing on points that differ from this.

FIG. 16 is a side sectional view showing the cooling structure 94 of the fourth embodiment. The heat generating section 20 has, as the heat generating elements 25, a first heat generating element 25A installed relatively on the left side and a second heat generating element 25B installed relatively on the right side. A first heat transfer body 30A and a second heat transfer body 30B are interposed as heat transfer bodies 30 between the heat generating part 20 and the heat dissipating part 40 in a vertically overlapping state.

17 is a perspective view showing two heat transfer bodies 30, and FIG. 18 is a perspective view showing a state in which the two heat transfer bodies 30 are vertically separated from the state of FIG. As shown in FIG. 18 , the right spring portion 35 of the first heat transfer body 30A is longer than the left spring portion 35 . Thereby, each fin 36 of the first heat transfer body 30A is installed on the left side. On the other hand, the left spring portion 35 of the second heat transfer body 30B is longer than the right spring portion 35 . Thereby, each fin 36 of the second heat transfer body 30B is installed on the right side.

Accordingly, as shown in FIG. 16, the fins 36 of the first heat conductor 30A are arranged at the gap gA between the first heat generator 25A and the heat radiating section 40, and the fins 36 of the second heat conductor 30B are , are arranged at a distance gB between the second heating element 25B and the heat radiating section 40. As shown in FIG. The spring constant of the spring portion 35 of the first heat transfer body 30A and the spring constant of the spring portion 35 of the second heat transfer body 30B are different from each other. Note that such a configuration can be achieved, for example, by configuring the first heat transfer body 30A and the second heat transfer body 30B with mutually different materials, or by making the first heat transfer body slightly different from the cases shown in FIGS. This can be achieved by making the spring portion 35 of the heat body 30A and the spring portion 35 of the second heat transfer body 30B have different thicknesses. Therefore, when the fins 36 of the first heat transfer body 30A are rotated from the natural state by a predetermined angle in the direction R around the horizontal axis with respect to the frame 31, the stress generated in the spring portion 35 of the first heat transfer body 30A, The stress generated in the spring portion 35 of the second heat transfer body 30B when the fins 36 of the second heat transfer body 30B are rotated by a predetermined angle in the direction R around the horizontal axis with respect to the frame 31 from the natural state different.

According to this embodiment, the following tenth effect is obtained in addition to the above first to ninth effects. The fins 36 of the first heat conductor 30A are arranged at the gap gA between the first heat generator 25A and the heat radiating section 40, and the fins 36 of the second heat conductor 30B are located between the second heat generator 25B and the heat radiating section 40. is arranged at a distance gB between . Then, when the fins 36 of the first heat transfer body 30A are rotated by a predetermined angle in the direction R around the horizontal axis from the natural state, the stress generated in the spring portion 35 of the first heat transfer body 30A and the stress generated in the second heat transfer body The stress generated in the spring portion 35 of the second heat transfer body 30B when the fin 36 is rotated by a predetermined angle in the direction R around the horizontal axis from the natural state in 30B differs from each other.

Therefore, for example, if the stress of the spring portion 35 of the first heat transfer member 30A is set larger than the stress of the spring portion 35 of the second heat transfer member 30B, the first heat generating member 25A is strongly applied to the first heat transfer member 25A. While the fins 36 of the heat transfer member 30A are brought into contact, the fins 36 of the second heat transfer member 30B can be brought into weak contact with the second heating member 25B. Conversely, if the stress of the spring portion 35 of the first heat transfer member 30A is set smaller than the stress of the spring portion 35 of the second heat transfer member 30B, the first heat transfer member 25A is weakly applied to the first heat transfer member 25A. While the fins 36 of the body 30A are brought into contact, the fins 36 of the second heat transfer body 30B can be brought into strong contact with the second heat generating body 25B. Therefore, for example, for one of the first heating element 25A and the second heating element 25B, it is desirable to give priority to the cooling performance even if it sacrifices the securing of interference for low repulsion to some extent, but to the other. On the contrary, it is effective when it is desired to secure a tightness with low repulsion even if the cooling performance is somewhat sacrificed.

[Other embodiments]
For example, the above embodiment can be implemented by changing as follows. For example, as shown in FIG. 2, in each embodiment, two heat transfer bodies 30 are stacked vertically, but three or more heat transfer bodies may be stacked vertically.

Further, for example, as shown in FIG. 4, the frame 31 has a rectangular plate frame shape in each embodiment, but may have other shapes such as a triangular plate frame shape or a circular plate frame shape. Further, for example, in each embodiment, the front-rear direction Y (that is, the direction in which the fins 36 are arranged side by side) corresponds to the vertical direction Z (that is, the direction of the distance g between the heat generating section 20 and the heat radiating section 40) and the horizontal direction. Although it is orthogonal to both X, the front-rear direction Y may be slightly slanted with respect to the direction orthogonal to the up-down direction Z and the direction orthogonal to the lateral direction X. Further, for example, in each embodiment, the heat transfer body 30 is made of metal, but instead of this, it may be made of resin, carbon composite material, or the like.

For example, as shown in FIG. 8, in the third embodiment, positioning holes 32 of two heat transfer bodies 30 are communicated with each other, and inserting bodies 39 such as screws and pins are inserted into the positioning holes 32. there is Instead of this, positioning holes 32 are provided at positions in each of the two heat transfer bodies 30 that do not vertically overlap the other heat transfer body 30 , and separate insertion bodies 39 are inserted into the positioning holes 32 of each heat transfer body 30 . may be inserted.

Further, for example, as shown in FIG. 11, in the third embodiment and the like, the fins 36 of the heat transfer body 30 are in the shape of a rectangular plate. Other shapes such as a hexagonal plate shape protruding toward the center may also be used.

Further, for example, in the third embodiment and the like, the lateral direction X (that is, the direction of both ends of the fins 36 supported by the spring portions 35) is the vertical direction Z (that is, the distance g between the heat generating portion 20 and the heat radiating portion 40) ), but may be slightly slanted with respect to the direction perpendicular to the up-down direction Z.

Further, for example, in the third embodiment and the like, the vertical direction Zy (that is, the direction of both ends of the fins 36 contacting the heat generating portion 20 and the heat radiating portion 40) is perpendicular to the horizontal direction X, It may be slightly inclined with respect to the direction perpendicular to the horizontal direction X.

Further, for example, in the third embodiment and the like, each fin 36 is longer in the horizontal direction X than in the vertical direction Zy, that is, is horizontally long. , that is, it may be vertically long.

Further, for example, in each embodiment, the heat transfer body 30 is integrally formed of the same material (metal), but instead of this, for example, in the third embodiment, for example, the frame 31 is made of ceramic, and the spring portion Each part of the heat transfer body 30 may be made of different materials, such as the fins 36 are made of a carbon composite material, while the fins 35 are made of metal.

Further, for example, in the third embodiment and the like, the spring portion 35 is rod-shaped with the horizontal direction X as the longitudinal direction, but it may be coil-shaped. Also, for example, in the third embodiment and the like, the two heat transfer bodies 30 have the same shape, but instead of this, they may have different shapes.

,
Further, for example, the two heat transfer bodies 30 are formed separately, but instead of this, as shown in FIG. The rear end of the heat transfer body 30 may be integrally formed so as to be connected to the front end of the heat transfer body 30 on the rear side. Then, for example, the rear heat transfer body 30 may be folded over the front heat transfer body 30 at the boundary between the front heat transfer body 30 and the rear heat transfer body 30 . That is, the two heat transfer bodies 30, whether separate or integrated, overlap each other, and between the fins 36 of one heat transfer body 30, the fins of the other heat transfer body 30 36 is arranged and the first effect described above can be achieved.

Further, for example, as shown in FIG. 18, in the fourth embodiment and the like, the first heat transfer body 30A has fins 36 only on the left side of the left side and the right side. Instead of this first heat transfer body 30A, the heat transfer body 30 of the first embodiment shown in FIG. It may be superimposed on the second heat transfer body 30B having chisel fins 36 . In this case, when the two heat transfer bodies 30 and 30B are superimposed on each other, the number of fins 36 twice as many as the number of fins 36 on the left side is present on the right side. For this reason, for example, in FIG. 16, for the heat generating element 25A on the left side, priority should be given to securing an interference with low repulsion even if the cooling performance is somewhat sacrificed, but for the heat generating element 25B on the right side, the opposite In addition, securing the interference with low repulsion is effective when you want to give priority to cooling performance even if you sacrifice a little. In this case, the two heat transfer bodies 30 and 30B may be made of the same material, or may be made of different materials.

20 Heat generating part 25 Heat generating element 30 Heat conductor 36 Fin 40 Heat radiation part 91 to 94 Cooling structure g Spacing X Horizontal direction Y Front and rear direction Y Z Top and bottom direction.

Claims (9)

A heat-generating part (20) having a heat-generating body (25), a heat-dissipating part (40) whose temperature is lower than that of the heat-generating part, and a heat transfer interposed between the heat-generating part and the heat-radiating part (g). a body (30);
The size direction of the space is defined as a space direction (Z), and a predetermined direction intersecting with the space direction is defined as an arrangement direction (Y). In the cooling structures (91-94) arranged in parallel,
Between the heat generating portion and the heat radiating portion, a plurality of the heat conductors are interposed in an overlapping state, so that the heat transfer elements are arranged in a direction (X) orthogonal to both the spacing direction and the side-by-side direction. See, between the fins of one heat transfer body, the fins of the other heat transfer body are arranged,
transferring the heat of the heat-generating part to the heat-dissipating part by each of the fins of each of the heat conductors ;
The fins of each heat conductor are in contact with the heat generating portion and the heat radiating portion, either directly or via portions of the heat conductor other than the fins. The fin has a portion in contact with the heat generating portion without interposing the fins of the other heat conductor and a portion in contact with the heat radiating portion without interposing the fins of the other heat conductor. and a cooling structure. 2. The cooling structure according to claim 1 , wherein in the fin row composed of the fins of all of the heat conductors in the overlapping state, all of the fins are arranged at an equal pitch (P) in the side-by-side direction. . With the widest surface of the fin as a fin surface, the fin surface is inclined with respect to a virtual plane (X, Y) orthogonal to the spacing direction,
A direction extending diagonally to the spacing direction along the fin surfaces is defined as a vertical direction (Zy), and a direction crossing the vertical direction along the fin surfaces is defined as a horizontal direction (X), Assuming that the direction of rotation about the horizontal direction is the direction around the horizontal axis (R),
The heat transfer body has a spring portion (35) that supports both lateral ends of each fin,
The elastic force of the spring portion urges the fins in the direction around the horizontal axis, so that one end portion of the fins in the vertical direction is pressed against the heat generating portion, and the other end portion of the fins in the vertical direction is pressed against the heat generating portion. 3. A cooling structure according to claim 1 or 2 , wherein a portion is pressed against said heat radiating portion. 4. The cooling structure of claim 3 , wherein said fins are longer in said lateral direction than in said longitudinal direction. 5. The heat transfer body according to claim 3 or 4 , wherein the heat transfer body has a frame (31), and the frame supports each of the fins via the spring by supporting each of the springs. cooling structure. The frame of each of the plurality of heat transfer bodies is provided with a positioning hole (32) penetrating the frame in the spacing direction,
In a state where the positioning holes of the other heat transfer bodies communicate with the positioning holes of the heat transfer bodies, a predetermined inserting body is inserted through the positioning holes to form a plurality of the heat transfer bodies. 6. The cooling structure of claim 5 , wherein the is positioned at the . In the overlapping state, when the positioning holes of each of the heat conductors are communicated with the positioning holes of the other heat conductors, a fin array consisting of the fins of all the heat conductors in the overlapping state 7. The cooling structure according to claim 6 , wherein all of said fins are arranged in said parallel direction at an equal pitch (P). Two heat conductors having the same shape are interposed as a plurality of heat conductors between the heat generating part and the heat radiating part,
For each heat transfer element, the two widest front and back surfaces of the frame are defined as a first frame surface (S1) and a second frame surface (S2), and the distance between the fins from the first frame surface to the front side thereof The projection length in the direction is defined as a first projection length (L1), and the projection length of the fins from the second frame surface to the front side thereof in the space direction is defined as a second projection length (L2). , with the state in which no external force is applied as the natural state,
In each of the two heat transfer bodies, in the natural state, the first protrusion length is longer than the second protrusion length by the thickness (T) of the frame or more,
The two heat transfer bodies overlap each other in a face-to-face state in which the first frame surfaces are in contact with each other,
In a state in which each of the two heat transfer bodies is interposed between the heat-generating portion and the heat-radiating portion, the first protrusion length is thicker than the second protrusion length of the frame. A cooling structure according to any one of claims 5 to 7 , wherein the cooling structure is longer by The heat-generating part has a first heat-generating body (25A) and a second heat-generating body (25B) arranged side by side as the heat-generating bodies,
A first heat transfer body (30A) and a second heat transfer body (30B) as the heat transfer bodies are interposed in the overlapping state between the heat generating part and the heat dissipation part,
The fins of the first heat conductor are arranged at an interval (gA) between the first heat generator and the heat radiating section, and the fins of the second heat conductor are arranged between the second heat generator and the heat dissipating section. It is arranged at a distance (gB) from the heat radiating part,
A state in which no external force is applied to the heat transfer body is defined as a natural state. stress generated in the spring portion of the second heat transfer body, and stress generated in the spring portion of the second heat transfer body when the fin is rotated by a predetermined angle in the direction around the horizontal axis from the natural state in the second heat transfer body are different from each other.

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