JP3181322U - Heat dissipation device - Google Patents

Abstract

An object of the present invention is to provide a heat dissipation device with improved heat dissipation efficiency.
A bottom plate 3 whose one surface is in contact with a heat radiating object 9 and that absorbs heat from the heat radiating object 9 and whose opposite surface is an installation surface 32; and the bottom plate 3 An upper plate 4 provided so as to face the bottom plate, a hollow plate-like body, a horizontal portion 51 fixed to the installation surface 32 of the bottom plate 3, and the horizontal portion 51 And a heat exchanging unit (5) having an extending portion (52) that is bent obliquely from an edge toward the upper plate (4) and is fixed to the upper plate (4). .
[Selection] Figure 3

Description

  The present invention relates to a heat radiating device, and more particularly to a heat radiating device that is installed on a heat radiating target and absorbs and dissipates heat generated by the heat radiating target.

  FIG. 1 and FIG. 2 show an example of a conventional heat dissipating device disclosed in Patent Document 1, in which FIG. 1 is a perspective view thereof, and FIG. 2 shows an internal configuration thereof. It is a cross-sectional view.

  As shown in FIG. 1, the conventional heat dissipation device 1 has a large number of heat dissipations formed on the upper surface of the bottom plate 10 by absorbing heat from the heat dissipation target by installing the bottom plate 10 on the heat dissipation target. Heat is dissipated by the fins 11.

  As shown in FIG. 2, a hollow 100 is formed inside the bottom plate 10, and the hollow 100 is configured such that a plurality of refrigerant flow paths 101 intersect vertically and horizontally.

  The refrigerant heated by the heat absorbed by the bottom plate 10 from the heat radiating target can be transferred and diffused to the heat radiation fins 11 formed on the upper surface of the bottom plate 10 while flowing convectively along the refrigerant flow path 101.

  However, this conventional heat radiating device 1 radiates heat by convection of a refrigerant that does not normally have a fixed flow direction in the refrigerant flow path 101. However, in this configuration, the refrigerant convects according to the temperature level. Since there is not much difference in altitude that can be achieved, the vaporized refrigerant is clogged in the refrigerant flow path 101 together with the liquid refrigerant before vaporization, and the phase transition of the refrigerant cannot often be used efficiently for heat dissipation. There is still a lot of room for improvement.

Taiwan Patent No. M261972 Specification

  In view of the above problems, the present invention is a heat dissipation device that is installed on a heat dissipation target and absorbs and dissipates the heat of the heat dissipation target, and the phase transition of the refrigerant is smoother than before and the heat dissipation efficiency is further improved. The object is to provide an improved heat dissipation device.

  In order to achieve the above object, the present invention has a bottom plate in which one surface is in contact with a heat dissipation object and absorbs heat from the heat dissipation object, and a surface opposite to the one surface is an installation surface; A top plate provided on the bottom plate so as to face the bottom plate, a hollow plate-like body, a horizontal portion fixed to the installation surface of the bottom plate, and an edge of the horizontal portion And a heat exchanging unit having an extending portion that is bent obliquely toward the upper plate and extends obliquely and has a distal end fixed to the upper plate.

  In the heat dissipating device, the extending portion of the heat exchange unit includes a pair of side surfaces each extending in a direction orthogonal to the installation surface and extending toward opposite sides, and both end edges of the pair of side surfaces. And a first extending surface extending from the edge of the horizontal portion to the upper plate side, and further extending from the extending portion in parallel with the bottom plate. It is preferable to have a plurality of radiating fins fixed to the extending portion.

  In the heat dissipation device, each of the first and second extending surfaces extends further obliquely from a vertical surface portion extending from the horizontal portion so as to be orthogonal to the horizontal portion, and an extending tip of the vertical surface portion. Each of the first and second extending surfaces has an extending length of the inclined surface portion longer than an extending length of the vertical surface portion, and The width of the side facing the horizontal portion of the first and second extending surfaces can be configured to be wider than the width of the side facing the horizontal portion of the side surface.

  In the heat dissipation device, each of the first and second extending surfaces extends further obliquely from a vertical surface portion extending from the horizontal portion so as to be orthogonal to the horizontal portion, and an extending tip of the vertical surface portion. And the first extending surface has an extending length of the inclined surface portion longer than an extending length of the vertical surface portion, and the second extending surface. The length of the vertical surface portion is longer than the length of the inclined surface portion, and the width of the side facing the horizontal portion of the side surface is the width of the side facing the horizontal portion of the extended surface. It can also be configured to be wider than the width.

  Due to the above configuration, the present invention transfers heat absorbed from the heat dissipation target to the heat exchange unit, and when the refrigerant stored in the horizontal part of the heat exchange unit is vaporized by the heat, it does not rise straight, Bending from the edge of the part toward the upper plate and extending obliquely, the tip rises diagonally into the extended part fixed to the upper plate, and the time for heat exchange in the extended part is extended, When the condensed liquid refrigerant has a slope in the extension, it flows smoothly downward without interfering with the rising gaseous refrigerant mainly along the slope, and returns to the horizontal part to absorb heat again. Therefore, the heat dissipation effect can be enhanced.

It is a perspective view of an example of the conventional heat radiator. It is a cross-sectional view by which the internal structure of the thermal radiation apparatus in FIG. 1 is shown. 1 is a perspective view showing a first preferred embodiment of the present invention. It is the IV-IV sectional view taken on the line in FIG. It is a perspective view in which the structure of the heat exchange unit 5 in the 1st preferable embodiment of this invention is shown. FIG. 3 is a perspective view showing a second preferred embodiment of the present invention. It is a perspective view in which the structure of the heat exchange unit 7 in the 2nd preferable embodiment of this invention is shown. It is the VIII-VIII sectional view taken on the line in FIG. It is sectional drawing by which the modification of the 2nd preferable embodiment of this invention is shown.

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

  3 to 5 show a first preferred embodiment of the present invention. FIG. 3 is a perspective view showing a first preferred embodiment of the present invention, FIG. 4 is a sectional view showing the first preferred embodiment of the present invention, and FIG. It is a perspective view in which the structure of the heat exchange unit 5 in 1st preferable embodiment is shown.

  As shown in the figure, the heat dissipation device of the present invention has one surface in contact with the heat dissipating object 9 and a contact surface 31 that absorbs heat from the heat dissipating object 9, and the surface opposite to the one surface is the installation surface 32. A bottom plate 3, a top plate 4 provided on the bottom plate 3 so as to face the bottom plate 3, and a hollow plate-like body, and is fixed so as to be in close contact with the installation surface 32 of the bottom plate 3. A heat exchanging unit 5 having a horizontal portion 51 and two extending portions 52 which are bent obliquely from both end edges of the horizontal portion 51 toward the upper plate 4 and are obliquely extended and fixed at the front end edge to the upper plate 4. A plurality of radiating fins 6 fixed to the extending portion 52 so as to protrude from the extending portion 52 in parallel with the bottom plate 3, and the internal space of the horizontal portion 51 and the extending portion 52 of the heat exchange unit 5 is While communicating with each other, the internal space is filled with a refrigerant.

  As shown in the figure, the extending portion 52 in the first embodiment has two types of a first extending portion 521 and a second extending portion 522, and each of the first extending portions 521 has an extended surface. A pair of side surfaces 521a that are orthogonal to the installation surface 32 and extend while facing each other, and both end edges of the pair of side surfaces 521a are inclined diagonally from the edge of the horizontal portion 51 to the upper plate side. It has the 1st and 2nd extending surface 521b, 521c which has extended. Each of the second extending portions 522 is sandwiched between a pair of side surfaces 522a extending with their respective expansion surfaces orthogonal to the installation surface 32 and facing each other on opposite sides, and both ends of the pair of side surfaces 522a. And first and second extending surfaces 522b and 522c extending obliquely from the edge of the portion 51 to the upper plate side.

  In the first embodiment, both the first and second extending surfaces 521b and 521c in the first extending portion 521 extend obliquely immediately after being bent from the edge of the horizontal portion 51, and the second Both the first and second extending surfaces 522b and 522c of the extending portion 522 are perpendicular to the vertical surface portions 522b1 and 522c1 that are bent from the edge of the horizontal portion 51 in a direction orthogonal to the horizontal portion 51. It comprises inclined surface portions 522b2 and 522c2 extending obliquely from the extending tip of the surface portions 522b1 and 522c1 to the upper plate 4. In the first embodiment, the inclined surface portions 522b2 and 522c2 are longer than the vertical surface portions 522b1 and 522c1.

  Furthermore, in the first embodiment, the widths of the first extending surfaces 521b and 521c and the second extending surfaces 522b and 522c included in the first extending portion 521 and the second extending portion 522, that is, the horizontal directions are horizontal. The width of the side facing the portion 51 is wider than the width of the side surfaces 521a and 522a, that is, the width of each side facing the horizontal portion 51.

  A second preferred embodiment of the present invention is shown in FIGS. FIG. 6 is a perspective view showing a second preferred embodiment of the present invention, and FIG. 7 is a perspective view showing a configuration of a heat exchange unit 7 in the second preferred embodiment of the present invention. FIG. 8 is a cross-sectional view showing a second preferred embodiment of the present invention. The difference between the second preferred embodiment and the first preferred embodiment lies in the configuration of the heat exchange unit 7, and the configuration of the heat exchange unit 7 in the second preferred embodiment will be described in detail below.

  The heat exchange unit 7 according to the second preferred embodiment of the present invention includes a horizontal portion 71 fixed so as to be in close contact with the installation surface 32 of the bottom plate 3, and bends from both end edges of the horizontal portion 71 toward the upper plate 4. Two extending portions 72 that are obliquely extended and the front ends are fixed to the upper plate 4, and the extending portions 72 are arranged so that the plurality of radiating fins 6 project from the extending portions 72 in parallel with the bottom plate 3. It is fixed.

  In the second embodiment, the two extending portions 72 are formed at both ends of the horizontal portion 71, respectively, but are symmetrical with each other in the same configuration. The extending portions 72 are sandwiched between a pair of side surfaces 721 extending upward while their respective extension surfaces are orthogonal to the installation surface 32 of the bottom plate 3 and facing each other, and both edges of the pair of side surfaces 721. And first and second extending surfaces 722 and 723 extending from the edge of the horizontal portion 71 to the upper plate 4 side.

  The first and second extending surfaces 722 and 723 are both vertical surface portions 722a and 723a extending from the horizontal portion 71 to the upper plate 4 side so as to be orthogonal to the horizontal portion 71, and the vertical surface portions 722a and 723a. And inclined surface portions 722b and 723b extending obliquely from the extending tip. Here, the extending length of the inclined surface portion 722b included in the first extending surface 722 is longer than the extending length of the vertical surface portion 722a, while the extending length of the vertical surface portion 723a included in the second extending surface 723 is inclined. It is longer than the extending length of the surface portion 723b.

  Furthermore, the width of the pair of side surfaces 721, that is, the width of the side where the side surface 721 faces the horizontal portion 71 is larger than the width of each extending surface 722, 723, that is, the width of the side where each extending surface 722, 723 faces the horizontal portion 71. It is getting wider.

  Further, FIG. 9 shows a modification of the second embodiment. As shown in the drawing, the second extending surface 723 of the extending portion 72 of the heat exchange unit 7 included in the heat dissipation device shown in FIG. Does not have a vertical surface portion or an inclined surface portion, but instead is formed as one arc surface.

  As described above, there is no particular limitation on the configuration of the extending portion of the heat exchange unit in the present invention, as long as it is bent obliquely from the edge of the horizontal portion toward the upper plate and fixed to the upper plate, When the refrigerant stored in the horizontal portion is vaporized by the heat absorbed from the bottom plate, it does not rise straight, but bends from the edge of the horizontal portion toward the top plate and extends obliquely, and the tip is Since it rises diagonally in the extending part fixed to the upper plate and the time for heat exchange in the extending part is extended, the heat dissipation effect can be enhanced.

  Due to the above configuration, the present invention transfers heat absorbed from the heat dissipation target to the heat exchange unit, and when the refrigerant stored in the horizontal part of the heat exchange unit is vaporized by the heat, it does not rise straight, Bending from the edge of the part toward the upper plate and extending obliquely, the tip rises diagonally into the extended part fixed to the upper plate, and the time for heat exchange in the extended part is extended, When the condensed liquid refrigerant has a slope in the extension, it flows smoothly downward without interfering with the rising gaseous refrigerant mainly along the slope, and returns to the horizontal part to absorb heat again. Therefore, the heat dissipation effect can be enhanced.

3 Bottom plate 31 Contact surface 32 Installation surface 4 Upper plate 5 Heat exchange unit 51 Horizontal portion 52 Extension portion 521 First extension portion 521a Side surface 521b First extension surface 521c Second extension surface 522 Second extension portion 522a Side surface 522b First extending surface 522b1, 522c1 Vertical surface portion 522b2, 522c2 Inclined surface portion 522c Second extending surface 6 Radiation fin 7 Heat exchange unit 71 Horizontal portion 72 Extending portion 721 Side surface 722 First extending surface 722a, 723a Vertical surface portion 722b, 723b Inclined surface portion 723 Second extended surface 9 Target for heat dissipation

Claims (4)

A bottom plate whose one surface is in contact with the heat dissipation object and absorbs heat from the heat dissipation object, and a surface opposite to the one surface is an installation surface;
An upper plate provided on the bottom plate so as to face the bottom plate;
A hollow plate-like body, which is fixed to the upper plate by bending obliquely from the horizontal portion fixed to the installation surface of the bottom plate and the edge of the horizontal portion toward the upper plate. And a heat exchange unit having an extending portion. The extending portion of the heat exchange unit is sandwiched between a pair of side surfaces extending with their respective expansion surfaces orthogonal to the installation surface and facing opposite to each other, and both end edges of the pair of side surfaces. First and second extending surfaces extending from the edge of the horizontal portion to the upper plate side, and
The heat radiating device according to claim 1, further comprising a plurality of heat radiating fins fixed to the extending portion so as to protrude from the extending portion in parallel with the bottom plate. Each of the first and second extending surfaces includes a vertical surface portion extending from the horizontal portion so as to be orthogonal to the horizontal portion, and an inclined surface portion extending more obliquely from the extending tip of the vertical surface portion. , And
In each of the first and second extending surfaces, the extending length of the inclined surface portion is longer than the extending length of the vertical surface portion,
Furthermore, the width | variety of the edge | side which faces the said horizontal part of the said 1st and 2nd extending | stretching surface is all wider than the width | variety of the edge | side which faces the said horizontal part of the said side surface. Heat dissipation device. Each of the first and second extending surfaces includes a vertical surface portion extending from the horizontal portion so as to be orthogonal to the horizontal portion, and an inclined surface portion extending more obliquely from the extending tip of the vertical surface portion. , And
The first extending surface has an extending length of the inclined surface portion longer than an extending length of the vertical surface portion,
The second extending surface has an extending length of the vertical surface portion longer than an extending length of the inclined surface portion,
Furthermore, the width | variety of the edge | side which faces the said horizontal part of the said side is wider than the width | variety of the edge | side which faces the said horizontal part of the said extending | stretching surface, The heat radiating device of Claim 2 characterized by the above-mentioned.

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