JPH0315982Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a heatsink that can be used with an axial flow fan attached to effectively dissipate heat, and is particularly suitable for use in combination with a micro-cooler etc. made of a Peltier effect element. This invention relates to a fin-type heatsink.

This type of fin-type heat radiator generally consists of a heat absorbing plate and a number of fins attached to the heat absorbing plate so that their fin surfaces are perpendicular to the heat absorbing plate. In the prior art, these fins are arranged in parallel, so the air flow is strong against the rows perpendicular to the fin surface, but weak against the rows parallel to the fin surface, and the airflow is Since the flow of cooling air is limited to one direction parallel to the direction in which the fins extend, the directionality of the cooling air is poor and the heat dissipation effect is low. Because of this requirement, the heat radiator has become large and has the disadvantage that the installation location is limited.

An object of the present invention is to provide a heat radiator that avoids the above-mentioned drawbacks, has high mechanical strength, has a high heat dissipation effect, and is not limited in installation location.

An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a microcooler 12 equipped with a heat sink 10 according to the present invention, and this microcooler 12 is composed of a flat Peltier effect element 14. It's on. The Peltier effect element 14 is made of a metal composite formed by bonding bismuth and antimony, for example. When a current is passed through this metal composite from one side to the other, one surface absorbs heat and the other surface absorbs heat. is generated. In this specification, a surface that absorbs heat when a current is passed in a certain direction is referred to as an endothermic surface 14a,
The surface that generates heat is referred to as a heat generating surface 14b.

The heat sink 10 of the present invention includes a Peltier effect element 14
A plurality of band-shaped fins 1 are sandwiched between a heat absorbing plate 16 joined to the heat generating surface 14b of the heat absorbing plate 16 and a fan mounting plate 22, and are attached to the heat absorbing plate 16 so that the plate surfaces are perpendicular to each other.
8 and a small fan 20 attached to a fan mounting plate 22. The fan mounting plate 22 is
It has a circular air suction hole 22a in the center, and the cooling air (cold air) from the small fan 20 passes through this air suction hole 22a to the heat absorption plate 16 and the fan mounting plate 22.
It is inhaled into the space between the

The plurality of band-shaped fins 18 are arranged radially between the heat absorbing plate 16 and the fan mounting plate 22 so as to form radial air flow passages 24 between adjacent fins 18 . Outer end 24 of air flow passage 24
a is opened near the outer edge between the heat absorption plate 16 and the fan mounting plate 22, and serves as an outlet for cooling air;
The inner end 24b of the air flow passage 24 opens near the air intake hole 22a of the fan mounting plate 22, and the fan 2
This serves as an inlet for cooling air from 0. In the illustrated embodiment, the air intake hole 22a of the fan mounting plate 22 is
is exposed from the air suction hole 22a so that the inner end of the fin 18 comes into direct contact with the air from the fan 20.

Next, referring to the heat dissipation function of the micro-cooler 12, the heat generated from the heat generating surface 14b of the Peltier effect element 14 of the micro-cooler 12 is dissipated by the heat radiator 10 of the present invention. At this time, the cooling air (cold air) supplied from the small fan 20 is passed through the air suction hole 22a of the fan mounting plate 22 from the axial direction.
The air hits the heat absorbing plate 16 through the air and spreads horizontally along the surface of the heat absorbing plate 16. However, since radial air flow passages 24 are formed between adjacent fins 18, the air that hits the heat absorbing plate 16 spreads horizontally along the surface of the heat absorbing plate 16. It expands radially from the open inner end (inlet) 24b of the air flow passage 24, and is guided to the outside from the open outer end (outlet) 24a of the air flow passage 24, allowing smooth flow of air.

In particular, it is noted that since the airflow passages 24 extend radially, the cooling air
Due to the rectifying action of 8, the heat is distributed evenly over the entire surface of the heat absorbing plate 16, thus improving the heat dissipation action.

According to the present invention, as described above, since the plurality of fins are arranged radially rather than in parallel, the mechanical strength is improved against warpage in all directions.
In addition, the flow of cooling air in the axial direction from the fan is
The radially arranged fins improve the heat dissipation effect by rectifying the air in the radial direction rather than in one direction, and the fan must be arranged so that the flow of cooling air from the fan runs along the length of the fin. Since the fins are arranged directly opposite to the upper surface of the fins, the overall size of the heat radiator is reduced, and there are no restrictions on the installation of the heat radiator.

[Brief explanation of the drawing]

FIG. 1 is a side view of a microcooler using a heat sink according to the present invention, FIG. 2 is a top view of a heat absorbing plate and fins, and FIG. 3 is a front view with the fan removed. 10... Heat sink, 16... Heat absorption plate, 18... Fin, 20... Fan, 22... Fan mounting plate,
22a... air intake hole, 24... air flow passage,
24a...outer end (exit), 24b...inner end (inlet).

Claims (1)

[Scope of utility model registration request] The fan mounting plate comprises a plurality of band-shaped fins sandwiched between a heat absorption plate and a fan mounting plate and mounted on the heat absorption plate so that the plate surfaces are perpendicular to the fan mounting plate, and a fan mounted on the fan mounting plate. has an air intake hole in the center, and the plurality of band-like fins are arranged radially to form a radial air flow passage between adjacent fins between the heat absorption plate and the fan mounting plate. , and an outer end of the air flow passage is opened near an outer edge between the heat absorption plate and the fan mounting plate, and an inner end of the air flow passage is opened near the air intake hole of the fan mounting plate. A heatsink featuring: