JP2572792Y2 - Pin fin radiator with fan - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pin fin type radiator with a fan of a forced air blowing type used as a radiator for an IC, a radiator for a Peltier device, a radiator for a motor, a radiator for an electronic control part, and the like. .

[0002]

2. Description of the Related Art Pin-fin type radiators have attracted attention in recent years because they can increase the radiating area of fins. As ICs and the like become more highly integrated and higher in performance in the future, further improvement in heat radiation performance and miniaturization of pin fin radiators are required.

The pin fin type radiator has a high fin density, and the natural convection method cannot provide sufficient heat radiation performance. For this reason, the pin fin type radiator is usually used as a forced blast system in which a fan is mounted above the pin fin.

[0004]

However, when air is blown from the fan directly to all the pin fins from above the pin fins, the air flow is disturbed at the central portion of the heat dissipation board, and the air is evenly blown to the entire fins. Have difficulty. Therefore, there is a problem that the heat radiation performance of the radiator cannot be sufficiently improved.

It is an object of the present invention to provide a pin fin type radiator with a fan which solves the above-mentioned problems of the prior art, enables uniform air blowing to the entire fins, and greatly improves heat radiation performance. .

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, a pin fin type radiator with a fan according to the present invention has a radiator body provided with a large number of pin fins on one side of a radiator substrate, and is disposed on the radiator body. The radiator of the forced blast system, which consists of a duct opened on the entire upper surface of the radiator body and a fan mounted above the duct, has a blast control plate interposed between the duct and the radiator body. The control plate has a ventilation opening formed only on the central portion of the heat dissipation board.

In the present invention, the shape of the ventilation opening is arbitrary, but is preferably circular. The ratio (opening ratio (%)) of the ventilation opening area to the ventilation control plate area is
Although it depends on the configuration of the radiator body (pin fin diameter, fin pitch, fin height, etc.), it is preferably 20 to 80%, more preferably 30 to 50%. 20 aperture ratio
%, The pressure loss increases, and the effect of forced air blowing from the fan is weakened. On the other hand, if the aperture ratio is larger than 80%, turbulence of the air flow occurs at the central portion of the heat dissipation substrate, which is not preferable.

In the present invention, the heat radiating substrate and the pin fin are made of a metal such as aluminum (including an alloy) or copper (including an alloy).

[0009]

According to the pin fin type radiator with fan of the present invention, the ventilation control plate is interposed between the duct and the radiator main body, and the ventilation control plate has a ventilation opening only on the central portion of the radiation substrate. Since it is formed, the wind sent from the fan passes through the ventilation opening without being disturbed, and it becomes possible to uniformly blow air to the entire pin fin. As a result, the heat radiation performance of the radiator is greatly improved.

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a specific example of a pin fin type radiator with a fan according to the present invention.

In FIG. 1, the radiator body (3) has a large number of pin fins (2) on one side of a heat radiation board (1). The heat dissipation board (1) and the pin fins (2) are both made of an aluminum alloy (A6063). Heat dissipation board (1)
Has a length of 60 mm, a width of 60 mm and a thickness of 5 mm. The pin fin (2) has a square cross section of 0.5 mm on a side and a height of 20 mm. The fin pitch is 1.1 mm.

On the top surface of the pin fins (2) of the radiator body (3), a ventilation control plate (7) made of an aluminum alloy (A6063) is provided. The ventilation control plate (7) has a length of 60 mm, a width of 60 mm and a thickness of 1 mm, and has a circular ventilation opening (6) having a diameter of 40 mm formed in the center of the ventilation control plate (7). 35%). Tie beam holes are formed at the four corners of the blower control plate (7).

The heat radiating board (1) and the pin fin (2), and the pin fin (2) and the air flow control plate (7) are respectively joined by brazing.

A duct (4) is arranged on the ventilation control plate (7). The duct (4) has a hollow columnar structure with a bottom of a square of 60 mm on a side and a height of 30 mm. A ceiling member (8) is provided at each of the four upper corners of the duct (4). A tie beam hole is formed in the ceiling member (8).

A fan casing (9) having a fan (5) is mounted on the duct (4).

The blower control plate (7), the duct (4) and the fan casing (9) are fixed to each other by a tie beam (not shown) penetrating the tie beam hole.

The pin fin type radiator with the fan having the above-mentioned structure.
According to (A), a ventilation control plate (7) is interposed between the duct (4) and the radiator body (3), and the ventilation control plate (7) is located above the central portion of the radiation board (1). A circular opening for ventilation with an opening ratio of 35%
(6), the wind sent from the fan (5) passes through the ventilation opening (6) without disturbance, and
(2) Even air can be sent evenly to the whole. As a result, the heat radiation performance of the radiator is greatly improved.

[Example 2] A pin fin with a fan which is exactly the same as the radiator (A) except that the ventilation opening (6) of the ventilation control plate (7) is a circle having a diameter of 30 mm (opening ratio 20%). Type radiator (B) was produced.

[Heat Radiation Performance Test] Next, the heat radiator (A) of Example 1 and the heat radiator of Example 2
As a comparison between (B) and these, a heat radiation performance test was performed on the pin fin type radiator with fan (C), which is exactly the same as the radiators (A) and (B) except that the air flow control plate is not provided. The procedure was as follows.

The heat radiators (A), (B) and (C) were each provided with a 100 W heating element on the bottom surface of the heat radiating board (1), and the air was blown from the fan (5) at a flow rate of 0.5 Nm ³ / min. At this time, the temperature rise of the heat radiation board (1) was measured. Table 1 shows the results.

[0022]

[Table 1]

As is clear from Table 1, the radiator of the present invention is provided.
In (A) and (B), the degree of temperature rise of the heat radiating board (1) is smaller than that of the comparative radiator (C), and the heat radiating performance is excellent. In particular, the radiator (A) in which the opening ratio of the ventilation opening (6) of the ventilation control plate (7) is 35% has extremely excellent heat radiation performance.

[0024]

[Effect of the Invention] As described above, the pin fin type radiator with fan of the present invention has a ventilation control plate interposed between the duct and the radiator main body, and the ventilation control plate is provided on the central portion of the radiation substrate. Since only the ventilation opening is formed, the wind sent from the fan passes through the ventilation opening without being disturbed, and is uniformly blown to the entire pin fin. Therefore, the heat radiation performance is greatly improved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a pin fin type radiator with a fan of the present invention.

[Explanation of symbols]

 (1)… Heat dissipation board (2)… Pin fin (3)… Heat radiator body (4)… Duct (5)… Fan (6)… Ventilation opening (7)… Ventilation control board

Continuation of front page (56) References JP-A-2-301192 (JP, A) JP-A-3-1133893 (JP, U) JP-A-6-45392 (JP, U) JP-A-5-33540 (JP , U)

Claims (1)

(57) [Scope of request for utility model registration] A large number of pin fins are provided on one side of a heat radiation board (1).
A radiator body (3) provided with (2), a duct (4) placed on the radiator body (3), and opened on the entire upper surface of the radiator body (3); Attached fan (5)
The duct (4)
A ventilation control plate (7) is interposed between the radiator body (3) and
A pin fin type radiator with a fan, in which a ventilation opening (6) is formed only on the central portion of a heat radiation board (1) in a ventilation control plate (7).