JPS6115422Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heat pipe type radiator used for cooling a heat generating element.

In recent years, heat sinks that utilize heat pipes have come into widespread use for cooling heat generating elements such as semiconductors.

As shown in FIG. 1, a conventional heat pipe type heat sink has a metal heating element mounting block 3 on one end of a heat pipe 1 to which a heating element 2 is attached, and a metal heating element mounting block 3 on the other end that is perpendicular to the heat pipe 1. A structure in which several fins 4... are attached is often used.

However, the conventional method has a large number of fins 4.
The fins 4 are small and have a small heat dissipation area, but the workability is poor because the fins 4 are assembled by drilling holes and inserting them one by one into the heat pipe 1. Especially when cooling a low-power heating element 2, the fins 4 can be small and have a small heat dissipation area. The smaller the fins 4, the worse the workability and assembly workability, and the more expensive they become.

The present invention was developed as a result of various researches in consideration of these points, and it is easy to process fins, has excellent assembly workability, and
Furthermore, we have developed a heat pipe type heat sink that is inexpensive and particularly suitable for cooling low-power heating elements.

That is, the present invention is characterized in that the heat pipe is attached obliquely to the side surface of a vertically arranged plate-like fin.

The present invention will now be described in detail with reference to embodiments shown in the drawings.

2 and 3 show an embodiment of the present invention. In the figures, numeral 5 indicates a plate-shaped fin made of an aluminum plate, a copper plate, etc.
A concave groove 6 having a semicircular cross section is formed obliquely along a substantially diagonal line.

One side of the heat pipe 1 is fitted into the groove 6 and bonded via a thermally conductive adhesive 7, and the heat pipe 1 is installed at an angle. The heat pipe 1 is made by deaerating the inside of a thermally conductive metal tube 8 such as a copper tube, injecting a working fluid 9 such as water or fluorocarbon, and sealing both ends.

At the inclined lower end of the heat pipe 1, a metal heating element mounting block 3 having a groove 10 with a semicircular cross section is attached to the plate-like fins 5 so as to sandwich the heat pipe 1 from both sides. A heating element 2 such as a transistor is attached to the surface of the heating element mounting block 3.

In the heat pipe type heat radiator having the above structure, the heat generated from the heat generating element 2 is transferred to the lower end side (heat receiving part side) of the inclined heat pipe 1 via the heat generating element mounting block 3, where the heat pipe is sealed under reduced pressure. The working fluid 9 rapidly obtains latent heat of vaporization and is vaporized, and this vapor rises along the longitudinal direction of the heat pipe 1. The rising steam touches the low-temperature inner wall of the pipe, releases latent heat of condensation, and condenses, and the condensed working fluid 9 flows down by its own weight along the inclined inner wall of the heat pipe 1, refluxing to the heat receiving section, and as follows. Similarly, heat transfer occurs rapidly along the length of the heat pipe 1 repeatedly. In this way, the heat transferred to the entire surface of the heat pipe 1 is transferred to the plate-shaped fins 5 via the thermally conductive adhesive 7 in contact with the heat pipe 1, and is further transferred in the vertical direction by the plate-shaped fins 5. Plate fin 5
Heat is radiated from the entire surface. Since the plate-like fins 5 are arranged vertically, the air heated in contact with the plate-like fins 5 rises along the plate-like fins 5 and is efficiently radiated, so that the heating element 2 is rapidly cooled.

Therefore, in the heat pipe type heat radiator, there is no need to drill holes in a plurality of fins 4 and install them one by one as in the conventional case, but to install holes in one plate-shaped fin 5 along the surface direction thereof. It can be assembled by simply fitting it into the heat pipe 1. Furthermore, since the heat pipe 1 is arranged at an angle, condensation and
Since the condensed working fluid 9 is a gravity type in which it flows down to the heat receiving section at the lower end due to its own weight, there is no need for a device like a horizontally arranged heat pipe to circulate the working fluid 9 and the heat receiving section through capillary action. , an inexpensive heat pipe 1 can be used.

Figure 4 shows another embodiment of the present invention, in which both ends of the metal plate are bent to form a U-shaped cross section, the lower portions of both bent ends are further bent into an L-shape, and this is attached to the mounting legs. The heat pipe 1 is fitted into the groove 6 of a plate-like fin 5 having a groove 6 having a semicircular cross section formed on the side surface and fixed with a thermally conductive adhesive 7. Further, a concave groove 10 having a semicircular cross section is formed at an angle in the heating element mounting block 3.
The plate-like fin 5 is attached to the heat pipe 1.
be installed parallel to the

The heat pipe type radiator with the above structure has mounting leg 1.
By fixing 1 with screws, it can be easily attached to equipment.

FIG. 5 shows another embodiment, in which a plate-like fin 5 having a groove 6 with a semicircular cross section is vertically arranged on the side surface of a metal plate, and a heat pipe 1 is placed in the groove 6. One side is fitted and fixed with a U-shaped metal fitting 12, and heating element mounting blocks 3, 3 are fixed to the lower end of the heat pipe 1 protruding from the groove 6 so as to be sandwiched from both sides.

This structure has heating element mounting block 3,
The heating elements 2... can be attached from both sides of the heating element 3.

FIG. 6 shows a further different embodiment, in which two plate-like fins 5, 5 each having an inclined recess 6 are shown.
These plate-like fins 5,
The heat pipe 1 is sandwiched between the heat pipes 5 and 5 from both sides by the grooves 6, 6, and the plate-like fins 5, 5 are connected by screws 13, and the heat pipe 1 is installed at an angle.

In the above embodiment, the heating element 2 is attached to the heating element mounting block 3, but
A structure may also be used in which the surface of the plate-like fin 5 near the heat pipe 1 is used as a heating element attachment part, and the heating element 2 is directly attached thereto.

As explained above, according to the heat pipe type heat sink according to the present invention, there is no need to insert and attach multiple fins with holes drilled into the heat pipe as in the conventional case, and it is not necessary to install the fins by inserting them into the heat pipe. It is easy to process the fins because all you need to do is to attach the heat pipe to the heat pipe.It has excellent assembly workability, can be manufactured at low cost, and has remarkable effects such as being particularly suitable for cooling low-power heating elements. .

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional heat pipe type radiator, Fig. 2 is a perspective view showing a heat pipe type radiator according to an embodiment of the present invention, and Fig. 3 is a perspective view showing a heat pipe type radiator according to an embodiment of the present invention. 4 and 5 are perspective views showing heat pipe type heat radiators according to other different embodiments, and FIG. 6 is a sectional view of a heat pipe type heat radiator according to yet another different embodiment. 1...Heat pipe, 2...Heating element, 3...
Heating element mounting block, 4...Fin, 5...Plate fin, 6, 10...Concave groove, 7...Thermal conductive adhesive, 8...Metal tube, 9...Hydraulic fluid, 11...Mounting Legs, 12...metal fittings, 13...screws.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A heat pipe type radiator in which a heat pipe is attached at an angle to the side surface of a vertically arranged plate-like fin. (2) The heat pipe type radiator according to claim 1, which is formed by bending both horizontal ends of a plate-like fin to form a U-shaped cross section. (3) The heat pipe type heat radiator according to claim 1 or 2, which is comprised of two plate-like fins attached to the heat pipe so as to sandwich them from both sides.