JP3033066U - Radiator - Google Patents

Abstract

(57) Abstract: In a radiator, the contact area between the fin and the substrate is expanded to firmly fix the fin and the substrate and to enhance the heat radiation effect. A large number of pressing pieces (2, 2) are vertically projected in parallel on the upper surface of a substrate (1), and grooves (3, 3) are provided in a gap between the pair of pressing pieces (2, 2).
To form A large number of minute concavo-convex portions 6, 6 are provided on the surface of the mounting portion 5 of the fins 4, 4. The mounting portion 5 of the fins 4 and 4 is fitted into the grooves 3 and 3, and the mounting portion 5 of the fin 4 is pressed and fixed by the pressing pieces 2 and 2 on both sides to form the radiator 21 (b).
The contact surface 7 between the pressing pieces 2 and 2 and the mounting portion 5 of the fin 4 is formed in the unevenness 8.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a radiator used for cooling ICs and other semiconductor devices.

[0002]

[Prior art]

 It has been known that a conventional radiator has a large number of grooves arranged in parallel on the upper surface of a substrate, and flat flat fins are fixed in parallel to the grooves.

[0003]

[Issues to be solved by the invention]

 However, in the case where the fins are fixed in parallel to a large number of grooves on the upper surface of the substrate, there are problems that the surface of the fins is smooth and the heat conduction with the substrate is defective, and the fins come off from the substrate.

Further, since a large number of fins are installed in parallel on the substrate at a small interval, there is a problem in that the gap between adjacent fins changes and heat dissipation cannot be effectively performed. Further, there is no known one that can increase the contact area between the fin and the substrate and one that prevents the fins from contacting each other.

[0005]

[Means for Solving the Problems]

 However, in this invention, since the fin mounting portion is provided with the concavo-convex portion, the contact surface between the fin mounting portion and the base plate becomes concavo-convex, and the contact area can be expanded, so that the above-mentioned problems have been solved. Further, since the spacers are provided on the surface of the fins, it is possible to avoid contact between the fins, and thus the above-mentioned problems can be solved.

That is, according to the invention, in a radiator in which a mounting portion of a fin is fitted and fixed in a groove on an upper surface of a substrate, a plurality of a pair of pressing pieces are juxtaposed in parallel on the upper surface of the substrate, and the pressing pieces are arranged in parallel. A groove is formed between the fins, and at least one of the surface of the mounting portion of the fin or the inner surface of the pair of pressing pieces has a large number of minute unevenness, wavy unevenness, grid-like unevenness, or a concave-convex portion with a narrow notch at the bottom. And a mounting portion of the fin is fitted in the groove, and the mounting portion of the fin is pressed and sandwiched by the pressing piece, and a contact surface between the pressing piece and the mounting portion of the fin is made uneven. It is a radiator. Further, in a radiator in which a fin mounting portion is fitted and fixed in a groove on the upper surface of the substrate, a large number of substantially L-shaped grooves having a pressing piece provided on the upper surface of the substrate are formed in parallel on the upper surface of the substrate. The fin mounting portion is formed in an L-shaped cross section, and a large number of minute concaves, wavy irregularities, grid-like irregularities or lower portions are formed on at least one of the surface of the fin mounting portion and the inner surface of the pressing piece. Forming a concavo-convex part such as a narrow cutout, fit the fin mounting part in the groove, press the pin mounting part with the pressing piece, and contact the pressing part with the fin mounting part. It is a radiator characterized by having an uneven surface. Also, in a radiator in which a fin mounting portion is fitted and fixed in a groove on the upper surface of the substrate, a large number of grooves having substantially inverted T-shaped cross sections having pressing pieces provided on both upper sides are arranged in parallel on the upper surface of the substrate. The fin mounting portion is formed into a bifurcated shape, and a large number of minute unevenness, wavy unevenness, or grid-like shape is formed on at least one of the surface of the mounting portion of the fin or the inner surface of the pair of pressing pieces. A concavo-convex section or a concavo-convex section with a narrow cutout is formed, the fin mounting section is fitted into the groove, and the fin mounting section is pressed and sandwiched by the pressing piece to attach the pressing piece and the fin. It is a radiator characterized by having an uneven contact surface. The notch with a narrow lower part in the above means a notch that is open downward, and a notch formed near the opening is narrower than other parts.

Further, in a radiator in which a mounting portion of a fin is fitted and fixed in a groove on the upper surface of the substrate, a plurality of a pair of pressing pieces are juxtaposed in parallel on the upper surface of the substrate to form a groove between the pressing pieces. A plurality of minute irregularities, wavy irregularities, lattice irregularities, or irregularities composed of notches with a narrow bottom, etc. are formed on at least one of the surface of the mounting portion of the fin or the inner surface of the pair of pressing pieces. The mounting portion of the fin is fitted in the groove, and the mounting portion of the fin is pressed and sandwiched by the pressing piece to make the contact surface between the pressing piece and the mounting portion of the fin uneven, and The radiator is provided with a spacer for keeping the interval between the adjacent fins substantially constant.

Although the uneven portion is provided on the surface of the mounting portion of the fin in the above description, it may be provided on the entire surface of the fin. This is because the surface area of the fins increases and the amount of heat dissipated by the fins also increases.

In the above description, the concavo-convex portion of the fin is a large number of minute concavo-convex portions, corrugated concavo-convex portions, or grid-shaped concavo-convex portions, or a notch with a narrow bottom portion.

[0010]

[Embodiment of the invention]

 According to this invention, a large number of a pair of pressing pieces are juxtaposed in parallel on the upper surface of the substrate. A groove is formed by the gap between the pair of pressing pieces. A mounting part to be inserted into the groove of the board is formed under the fin. An uneven portion is formed on at least one of the surface of the mounting portion of the fin or the inner surface of the pair of pressing pieces. The concavo-convex portion is made up of minute concavo-convex, wavy concavo-convex, lattice-shaped concavo-convex, or a notch with a narrow bottom. The mounting portion of the fin is fitted in the groove between the pressing pieces of the substrate, and the mounting portion of the fin is pressed and sandwiched by the pressing pieces. As a result, the contact surface between the pressing piece and the mounting portion of the fin is made uneven, and a radiator in which the pressing piece and the fin are firmly fixed can be configured.

[0011]

Embodiment 1 An embodiment of the present invention will be described with reference to FIGS. A large number of pressing pieces 2 are vertically projected in parallel on the upper surface of the substrate 1, and a groove 3 is formed in the gap between the pair of pressing pieces 2 and 2 (FIG. 1A). A large number of minute concave and convex portions 6, 6 are provided on the surface of the mounting portion 5 of the fin 4 used in this invention (FIG. 2 (a)). Next, the mounting portion 5 of the fin 4 is fitted into the groove 3, and the mounting portion 5 of the fin 4 is pressed and fixed by the pressing pieces 2 and 2 on both sides, so that the pressing pieces 2 and 2 and the mounting portion 5 of the fin 4 are connected. The contact surface 7 is made uneven and the radiator 21 is formed (FIG. 1B). In the above, the substrate 1 is usually formed from an extruded profile of aluminum or aluminum alloy. In the above description, since the pressing pieces 2 and 2 and the mounting portion 5 of the fin 4 are concave and convex 8, the contact area can be increased as compared with a flat case. Therefore, the strength in the direction in which the fin 4 is pulled out and in the direction in which the fin 4 is pulled along the groove 3 can be increased.

Further, in the above-mentioned embodiment, the minute concavo-convex portion 6 is formed on the mounting portion 5 of the fin 4, but the concavo-convex portion having another structure may be used. That is, the wavy concave convex portions 16 can be formed on the mounting portion 5 of the fin 4 (FIG. 2B), or the lattice-shaped concave and convex portions 17 can be formed (FIG. 2C). Further, the mounting portion 5 of the fin 4 may be provided with a notch 18 having a partially circular lower end 18a and formed into a concavo-convex portion (FIG. 3 (a)). In this case, when the fin 4 is pressed by the pressing pieces 2 and 2 of the substrate 1, the portion of the pressing piece 2 that abuts the periphery of the notch 18 is pressed, and the portion of the pressing piece 2 corresponding to the notch 18 is pressed. The pressing piece 2 and the fin 4 are firmly fixed to each other by bulging into the notch 18. Therefore, the strength of the fin 4 in the upward direction and the strength of the fin 4 in the direction along the groove can be increased. In addition, similarly, it is possible to form a concave and convex portion by providing a notch 19 in which the lower end 19a is narrowly formed (FIG. 3B). Further, instead of the notch, the fin 4 may be provided with through holes 20, 20 to form an uneven portion (FIG. 3C).

[0013]

Embodiment 2 An embodiment of the present invention will be described with reference to FIG. On the upper surface of the substrate 1a, a large number of grooves 3a, 3a having a pressing piece 2a on one side are arranged in parallel. The width of the groove 3a is the same as the width of the mounting portion 5a of the fin 4a. The pressing piece 2a covers the groove 3a and is inclined upward, and the length of the pressing piece 2a is the width of the groove 3a minus the thickness of the fin 4a (FIG. 3 (a)).

The lower portion of the fin 4a used in the present invention is formed in an L shape to form a mounting portion 5a of the fin 4a, and the uneven portions 6a and 6a are provided on the surface of the mounting portion 5a (FIG. 3A). Next, the mounting portion 5a of the fin 4a is fitted into the groove 3a, the L-shaped mounting portion 5a of the fin 4a is pressed and fixed by the pressing piece 2a, and the pressing piece 2a, the bottom portion 10 of the groove 3a and the fin 4a are fixed. The radiator 21 is constructed by making the contact surface 7a of the mounting portion 5a uneven (8a) (FIG. 3 (b)). In the above description, the pressing piece 2a is inclined upward so that the mounting portion 5a of the fin 4a can be easily fitted into the groove 3a.

In the above embodiment, the uneven portion 6a is formed on the entire surface of the L-shaped mounting portion 5a, but it is possible if the uneven portion is formed at least on the upper surface of the mounting portion 5a (not shown). .

Further, other configurations of the concave-convex portion 6a in the above-described embodiment will be omitted as in the first embodiment.

[0017]

[Embodiment 3] An embodiment of the present invention will be described with reference to FIG. A large number of grooves 3b having upper pressing pieces 2b on both sides are provided in parallel on the upper surface of the substrate 1b at predetermined intervals. The width of the groove 3b is the same as the width of the mounting portion 5b of the fin 4b. The pressing pieces 2b, 2b horizontally project inward from both sides of the groove 3b, and the total length of the projections is about half the width of the groove 3b. The fins 4b used in this consideration are provided with notches at predetermined intervals in the lower part, are bent alternately, and are formed into two forks with a downward inclination in cross section, to form the attachment part 5b. An uneven portion 6b is provided on the upper surface of the mounting portion 5b (FIG. 5 (a)).

Next, the mounting portion 5b of the fin 4b is inserted into the groove 3b of the substrate 1b, and the fin 4b is pressed to make the bifurcation of the mounting portion 5b of the fin 4b horizontal in the groove 3b. The pieces 2b and 2b are pressed to form the contact surface 7b between the mounting portion 5b and the substrate 1b to be uneven 8b, and the fins 4b are fixed to the substrate 1b to form the radiator 21 (FIG. 4B).

The other configurations are omitted as in the first embodiment.

[0020]

Embodiment 4 An embodiment of the present invention will be described with reference to FIG. A plurality of U-shaped cuts 11 are formed on the surface of the fin 4c and the fins 4c are raised to form a spacer 13 with a spacer 13 (FIG. 6A). As in the first embodiment, the fin 13 has minute uneven portions 6 formed on the mounting portion 5. The fins 13 and 13 are arranged between the pressing pieces 2 and 2 of the substrate 1 similar to the first embodiment, and the pressing pieces 2 and 2 are pressed to fix the fins 13 to the substrate 1 to form the radiator 21. (FIG.6 (b)).

In the above description, the spacer 12 is formed by making a U-shaped notch and raising it. However, another member may be welded or integrally formed as long as it has the same shape. Further, the spacer 12 can be added to the fins of the first to third embodiments.

[0022]

[Effect of the invention]

 In this invention, the uneven portion is provided on the surface of the mounting portion of the fin, and the mounting portion is pressed and fixed to the substrate by the pressing piece, so that the contact surface between the mounting portion and the substrate becomes uneven, and the contact area between the mounting portion and the substrate is expanded. Therefore, heat transfer to the fins is promoted, which has the effect of increasing the amount of heat dissipated by the fins. Further, in this invention, since the mounting portion has the uneven portion, the fin and the substrate can be firmly fixed to each other.

Further, in this invention, since the fins are provided with the spacers, it is possible to prevent the adjacent fins from contacting each other and to keep the fin interval constant, so that the heat dissipation effect can be enhanced.

[Brief description of the drawings]

FIG. 1 is an embodiment of the present invention, (a) is a partial vertical cross-sectional view of a radiator before being fixed with a part cut away, and (b) is a partial vertical cross-sectional view of a radiator.

2A, 2B and 2C are a front view and a side view of a fin used in an embodiment of the present invention.

3A, 3B and 3C are a front view and a side view of the fin, respectively.

FIG. 4 is a partial vertical cross-sectional view of another embodiment before fixing, with (a) partially broken, and (b) a partial vertical cross-sectional view of the radiator.

5 (a) and 5 (b) are partial vertical cross-sectional views of a radiator before fixing, in which another part is partially cut away, and FIG.

6 (a) and 6 (b) are perspective views of fins and FIG. 6 (b) is a partial vertical cross-sectional view of a radiator in another embodiment.

[Explanation of symbols]

 1, 1a, 1b Substrate 2, 2a, 2b Pressing piece 3, 3a, 3b Groove 4, 4a, 4b Fin 5, 5a, 5b Mounting part 6, 6a, 6b Concavo-convex part 7, 7a, 7b Contact surface 8, 8a, 8b Unevenness 10, 10a Bottom 11 U-shaped notch 12 Spacer 13 Fin with spacer 15 Minute unevenness 16 Wavy unevenness 17 Lattice unevenness 18, 19 Cutout 20 Through hole 21 Heatsink

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[Procedure amendment]

[Submission date] August 27, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

[Fig. 2]

Claims (4)

[Utility model registration claims] 1. A radiator in which a mounting portion of a fin is fitted and fixed in a groove on an upper surface of a substrate, and a plurality of a pair of pressing pieces are juxtaposed in parallel on the upper surface of the substrate and a groove is formed between the pressing pieces. A plurality of minute irregularities, wavy irregularities, on at least one of the surface of the mounting portion of the fin or the inner side surfaces of the pair of pressing pieces.
A grid-shaped unevenness or an unevenness part having a narrow notch at the bottom is formed, the mounting part of the fin is fitted in the groove, and the mounting part of the fin is pressed and sandwiched by the pressing piece, and the pressing piece and the fin. A heat sink characterized in that the contact surface with the mounting portion of is made uneven. 2. A radiator having a fin mounting portion fitted and fixed in a groove on an upper surface of a substrate, wherein a large number of substantially L-shaped grooves having a pressing piece provided on the upper surface of the substrate are arranged in parallel. The fin mounting portion is formed in an L-shaped cross section, and a large number of minute irregularities, wavy irregularities, lattice irregularities or lower portions are formed on at least one of the surface of the fin attaching portion and the inner surface of the pressing piece. Forming a concavo-convex part consisting of a narrow notch, etc., fitting the mounting part of the fin in the groove, pressing the mounting part of the fin with the pressing piece, and contacting the pressing part with the mounting part of the fin. A radiator characterized by having an uneven surface. 3. A radiator in which a fin mounting portion is fitted and fixed in a groove on the upper surface of a substrate, and a groove having a substantially inverted T-shaped cross section in which pressing pieces are provided on both upper sides of the radiator is formed on the upper surface of the substrate. Formed in parallel with each other, the mounting portion of the fin is formed into a bifurcated shape,
On the surface of the mounting portion of the fin or on at least one of the inner side surfaces of the pair of pressing pieces, a large number of minute unevenness, wavy unevenness, grid-like unevenness or unevenness formed by a notch at the bottom is formed, and the groove is formed in the groove. A radiator characterized in that the mounting portion of the fin is fitted, the mounting portion of the fin is pressed and sandwiched by the pressing piece, and the contact surface between the pressing piece and the mounting portion of the fin is made uneven. 4. A radiator in which a mounting portion of a fin is fitted and fixed in a groove on an upper surface of a substrate, and a plurality of a pair of pressing pieces are juxtaposed in parallel on the upper surface of the substrate and a groove is formed between the pressing pieces. A plurality of minute irregularities, wavy irregularities, on at least one of the surface of the mounting portion of the fin or the inner side surfaces of the pair of pressing pieces.
Forming a grid-shaped uneven portion or an uneven portion having a narrow notch or the like at the bottom, fit the mounting portion of the fin in the groove, press the sandwiching portion of the fin with the pressing piece, and press the pressing piece. A radiator characterized in that a contact surface with a mounting portion of a fin is made uneven, and a spacer is provided on the surface of the fin to keep a space between adjacent fins substantially constant.