JPH07234035A - Radiator - Google Patents

Abstract

PURPOSE:To improve a heat dissipating operation without increasing in size an axial flow fan by providing fins provided at a heat dissipating plate and formed substantially in parallel with a wind direction from the fan. CONSTITUTION:A heat dissipating plate 12 is connected to a heat dissipating surface 11a of a Peltier element 11, and an axial flow fan 13 which is rotated at a shaft 0 perpendicular to the plate 12 is arranged above the plate 12. On the other hand, a heat absorbing plate 14 is clamped with screws 15 at the heat absorbing surface 11b of the element 11 via a thermal conductive member 16. Blades 12a formed spirally are integrally formed with the plate 12, for example, by an aluminum die casting. A shape of the blade 12a is decided in a radial component and a circumferential component of wind from the fan 13, and formed substantially in parallel with the direction of the wind from the fan 13. Thus, since the wind from the fan 13 may have a pressure loss of only in an axial component, the wind from the fan 13 can be effectively utilized, thereby improving heat dissipating operation without increasing in size.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator and can be used for radiating heat from a thermoelectric conversion element used in a cool box, a dehumidifying device, an air conditioner or the like.

[0002]

2. Description of the Related Art As a conventional technique of this kind, a real fairness 3
The technique disclosed in Japanese Patent Publication No. 15982 is known.

5 and 6 are front and side views of the device disclosed in the art. In both figures, a radiator 102 is joined to a heat radiation surface 101 of a Peltier element 100 which is a thermoelectric conversion element. The radiator 102 is the radiator plate 1
03, a plurality of band-like fins 105 sandwiched between the heat radiating plate 103 and the fan mounting plate 104 and mounted at right angles to the heat radiating plate 103, and a small fan 106 mounted on the fan mounting plate 104. It is configured. The fan mounting plate 104 has a circular air intake port 104a at the center, and the wind from the small fan 106 is blown through the air intake port 104a.
It is introduced into the space between the heat dissipation plate 103 and the fan mounting plate 104 through a. The plurality of strip-shaped fins 105 are adjacent to each other between the heat dissipation plate 103 and the fan mounting plate 104.
5 and 5 are arranged radially so as to form a radial air flow passage 107. An outer end 107a of the air flow passage 107 opens near the outer edge between the heat dissipation plate 103 and the fan mounting plate 104 to serve as an outlet for wind from the fan 106, and an inner end 107b of the air flow passage 107 is The opening is formed in the vicinity of the air intake port 104a of the fan mounting plate 104 and serves as an inlet for the wind from the fan 106.

In the prior art having the above structure, the fan 10 is used.
After the wind from 6 hits the heat dissipation plate 103 at a right angle, the heat is dissipated by spreading radially and evenly through the air flow passage 107.

[0005]

The conventional fan 106 described above is an axial fan that rotates about an axis perpendicular to the plate surface of the heat dissipation plate 103. The wind from the axial fan has a radial component, a circumferential component, and an axial component,
Since the band-shaped fins 105 of the above-described related art are provided radially, the wind from the fan 106 causes pressure loss in the axial direction component and the circumferential direction component. As a result, a large fan is required to obtain the required heat radiation effect, which leads to an increase in cost.

The present invention makes effective use of the wind of a fan,
The technical problem is to improve the heat dissipation effect without increasing the size of the fan.

[0007]

In order to solve the above-mentioned technical problems, the technical means taken in the invention of claim 1 is a heat-dissipating plate which comes into contact with a heat-dissipating surface of a thermoelectric conversion element in a heat transfer state, and a heat-dissipating plate. In a radiator provided with an axial fan that rotates about an axis perpendicular to the plate surface of the plate, a fin provided on the radiator plate is formed substantially parallel to the direction of the wind from the axial fan. .

[0008]

In the present invention, since the fins are formed substantially parallel to the direction of the wind from the axial fan, the wind from the fan needs only a pressure loss in the axial direction, so that the wind from the fan can be effectively used. It is possible to improve the heat dissipation effect without increasing the size of the fan.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to the drawings.

FIG. 1 is a front view of a heat exchange device having a radiator according to this embodiment. In the figure, reference numeral 10 denotes a heat exchange device including a Peltier element 11 which is a thermoelectric conversion element.
A heat radiating plate 12 is joined to the heat radiating surface 11a of the Peltier element 11, and the heat radiating plate 12 is provided above the heat radiating plate 12 in the figure.
An axial fan 13 that rotates around an axis O that is perpendicular to is disposed. On the other hand, a heat absorbing plate 14 is fixed to the heat absorbing surface 11 b of the Peltier element 11 with a screw 15 via a heat transfer member 16.

Fins 12a formed in a spiral shape as shown in FIG. 2 are integrally formed on the heat dissipation plate 12 by, for example, aluminum die casting. The shape of the fins 12 is determined by the radial direction component and the circumferential direction component of the wind from the axial fan 13, and is formed substantially parallel to the direction of the wind from the axial fan 13.

In this embodiment, since the fins 12a are formed substantially parallel to the wind direction from the axial flow fan 13, the wind from the axial flow fan 13 needs only a pressure loss in the axial direction. The wind from the flow fan 13 can be effectively used, and the heat dissipation effect can be improved without increasing the size of the fan. The rotation direction of the axial fan 13 facing in this embodiment is the direction of arrow A (in FIG. 2).

Next, another embodiment according to the present invention will be described with reference to FIGS. In both figures, the heat dissipation plate 20 has a portion 21 in which a plurality of fins 20a are formed in parallel in the horizontal direction (in FIG. 3) and a portion 21 in which a plurality of fins 20a are formed in parallel in the vertical direction (in FIG. 3). 22 and 22. Incidentally, also in this other embodiment, the rotating direction of the axial fan 13 which faces is the direction of the arrow B.

In this alternative embodiment, since the fin 20a has a simple shape as shown in FIG. 3, it can be manufactured at a low cost.

[0015]

According to the present invention, since the fins are formed substantially parallel to the direction of the wind from the axial fan, the wind from the fan needs only a pressure loss in the axial direction. It can be effectively used, and the heat dissipation effect can be improved without increasing the size of the fan.

[Brief description of drawings]

FIG. 1 shows a front view of a heat exchange device having a radiator according to the present invention.

FIG. 2 shows a top view of the heat sink of FIG.

FIG. 3 shows a top view of a heat sink of another embodiment according to the present invention.

FIG. 4 shows a front view of a heat dissipation plate of another embodiment according to the present invention.

FIG. 5 shows a front view of a conventional radiator.

FIG. 6 shows a side view of a conventional radiator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Heat exchange device 11 ... Peltier element (thermoelectric conversion element) 11a ... Radiating surface 12 ... Radiating plate 12a ... Fins 13 ... Axial fan 20 ... Other embodiment Heat sink 20a ... Fin of another embodiment

Claims (1)

[Claims] 1. A radiator provided with a heat radiating plate in contact with a heat radiating surface of a thermoelectric conversion element in a heat transfer state, and an axial fan rotating about an axis perpendicular to the plate surface of the heat radiating plate. A radiator provided with fins which are provided on the radiator plate and are formed substantially parallel to a wind direction from the axial fan.