JP2904746B2 - Radiator for electronic equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat radiating device for electronic equipment, and more particularly, to an electronic circuit board disposed on a base plate.
The present invention relates to a heat radiating device for an electronic device in which air is flowed into a base plate by a radiating fan and radiates heat by using the base plate itself as a heat radiating plate.

[0002]

2. Description of the Related Art For example, electronic equipment such as a DC-AC inverter has a device in which a power transistor is mounted on a heat sink inside. When such an electronic device is used outdoors, it is necessary to have a drip-proof structure so that water does not enter inside. For this purpose, a method of filling the inside with a filler or covering the entire circuit with silicon rubber is considered, but in this case, the heat radiation effect is significantly reduced. In addition, the workability is poor, and when filling the inside with the filler, there is a possibility of flowing into places other than necessary. In addition, if a heat dissipation fan is housed inside for forced air cooling, there is a disadvantage that the heat dissipation effect is hindered by the filler or the like.

[0003] Therefore, a main object of the present invention is to provide a heat radiating device for electronic equipment which has a drip-proof structure, has good ventilation, and has an improved heat radiating effect.

[0004]

The invention according to claim 1 is
A heat dissipation device of an electronic device an electronic circuit board and the cooling fan is provided on the base plate, the base plate is a thin cylindrical shape, a suction hole formed in its side wall, the base plate
Formed in the upper edge of the side wall to drain water that has entered the wall
A drain hole for draining water from the groove, a first air passage connected to the suction hole and having an opening formed on one upper side thereof, and a first air passage formed in parallel to the first air passage. And a second air passage having an exhaust hole formed on one side thereof and an opening hole formed on the upper side on the other side. Is configured to be discharged from the exhaust hole through the ventilation path.

[0005]

[0006] In the invention according to claim 2, the base plate of claim 1, the interior of the electronic circuit board externally et water enters and immersion
A waterproof cover is installed to prevent the

[0007]

FIG. 1 is an external view of a DC-AC inverter of an electronic apparatus according to an embodiment of the present invention, and FIG. 2 is an external view showing a state where a door of FIG. 1 is opened.

In FIG. 1 and FIG. 2, the DC-AC inverter is covered by a cover 1 and a door 3. An input terminal 4 is formed on a side surface of the cover 1, and an exhaust hole 6 is formed on a front surface. As shown in FIG. 2, the key switch 7, the power meter 8 and the outlet 9 are provided in the door 3.
And so on.

FIG. 3 is an external perspective view showing the base plate 10, and FIG. 4 is an external perspective view in which a fan, an electronic circuit board and the like are arranged on the base plate 10.

The side surface of the base plate 10 is covered with the cover 1 shown in FIG. 1, and FIGS. 3 and 4 show a state in which the cover 1 is removed. As shown in FIG. 4, an electronic circuit board 30 and a radiating fan 31 that generate heat are arranged on the base plate 10, and a power transistor 32 is attached to the base plate 10, which also functions as a radiating plate. As shown in FIG. 3, the base plate 10 is formed in a thin cylindrical shape extruded from aluminum. That is, the base plate 10 is formed in a cylindrical shape by the top plate 11, the bottom plate 12, and the side plates 13, 14, the internal space is further partitioned by the partition plates 15, 16, 17, and the ventilation path is in a maze state. .

Suction holes 18 and 19 for sucking air are opened at the center of the side plate 13, and opening holes 20 and 21 are formed in the partition plate 15 at positions opposed to the suction holes 18 and 19.
Are formed. The space partitioned by the top plate 11, the bottom plate 12, and the partition plates 15, 16 is used as a first air passage, and the top plate 11, the bottom plate 12, and the partition plates 16, 17 are provided.
The space partitioned by the above is a second air passage. An opening hole 22 is formed in the top plate 11 on one side of the first ventilation path, and an opening hole 23 is formed in the top plate 11 on the other side of the second ventilation path. The opening on one side of the second ventilation path is connected to the exhaust hole 6 of the cover 1 shown in FIG.
The opening at one end and the other end of the first ventilation path and the opening at the other end of the second ventilation path are covered by a cover 1.

When the cooling fan arranged on the base plate 10 rotates, air is sucked in from the air suction holes 18 and 19 of the side plate 13, and the inside of the cover 1 is opened from the first air passage through the opening hole 22. And is exhausted from the exhaust hole 6 through the opening hole 23 through the second ventilation path. Thereby, the heat generated in the internal circuit is forcibly air-cooled.

Further, grooves 24, 25 are formed along the upper edges of the side plates 13, 14 of the base plate 10. These grooves 2
Numerals 4 and 25 are provided so that the water that has entered the interior flows, and the water collected in the grooves 24 and 25 is discharged from the drain hole 5 shown in FIG.

The drain holes 5 are formed at both ends of each of the side plates 13 and 14 in FIG. 3, and open to the spaces between the side plate 13 and the partition plate 15 and between the side plate 14 and the partition plate 17, respectively. As a result, water is discharged into these spaces and further discharged through holes (not shown) formed in front and rear of the case.

As described above, in this embodiment, since the ventilation path is in a maze state, even if rainwater or the like enters through the exhaust hole 6, the risk of water entering the base plate 10 can be reduced. Even if water enters the base plate 10, it can flow into the grooves 24 and 25 formed on the upper edges of the side plates 13 and 14, and the water can be discharged from the drain hole 5. It is possible to reduce the risk that the circuit board will break down.

In the above-described embodiment, the present invention is applied to D
Although the present invention is applied to the C-AC inverter, the present invention is not limited to this. The present invention can also be applied to an electronic device having a heat generating source such as a DC-DC converter and requiring drip-proof forced air cooling. .

[0017]

As is evident from the foregoing description, according to the present invention, the base plate a thin cylindrical shape, so to form a ventilation path as a labyrinth therein, can widely dissipation area, yet based
A groove is formed in the upper part of the side wall to discharge water that has entered the board
To form a drain hole for draining water from the groove
Therefore, even if water intrudes from the exhaust hole , the risk of intrusion on the base plate can be reduced, and both heat dissipation and drip-proof effect can be achieved.

[Brief description of the drawings]

FIG. 1 is an external view of a DC-DC converter according to an embodiment of the present invention.

FIG. 2 is an external view showing a state where a door of the DC-DC converter of FIG. 1 is opened.

FIG. 3 is an external perspective view showing a base plate.

FIG. 4 is an external perspective view showing a state where a heat dissipation fan and an electronic circuit board are arranged on a base plate.

[Explanation of symbols]

 Reference Signs List 1 cover 3 door 5 drain hole 6 exhaust hole 10 base plate 11 top plate 12 bottom plate 13, 14 side plate 15, 16, 17 partition plate 18, 19 suction hole 20, 21, 22, 23 opening hole 24, 25 groove 30 electron Circuit board 31 Heat dissipation fan 32 Power transistor

Claims (2)

(57) [Claims] 1. A heat dissipating device for an electronic device having an electronic circuit board and a heat dissipating fan provided on a base plate, wherein the base plate has a thin cylindrical shape, and a suction hole formed on a side wall thereof. And on the side wall for discharging water that has entered the base plate.
A groove formed in an edge, a drainage hole for draining water from the groove, a first ventilation path connected to the suction hole and having an opening formed in an upper part on one side thereof, and the first ventilation A second ventilation path formed in parallel with the passage, having an exhaust hole formed on one side thereof, and having an opening formed on the upper side on the other side, wherein the heat radiation fan sucks air from the suction hole. And
A heat radiating device for an electronic device, wherein the heat is exhausted from the exhaust hole through the first ventilation path through the second ventilation path. 2. An electronic circuit board inside said base plate.
Wherein the waterproof cover for externally et water is prevented from entering is attached to the heat dissipation device of electronic apparatus according to claim 1.