JP2021086874A - Electric apparatus - Google Patents

Abstract

To satisfactorily cool a component in need of cooling of two rooms in a case without impairing designability.SOLUTION: A partition wall 14 partitions inside of a hollow case 2 into a lower chamber 16 and an upper chamber 18. An intake holes 20 and an exhaust holes 22 are provided so as to face each other on the lower chamber 16 side of the case 2. A fan 24 is provided in the case 2 so as to introduce air from the intake hole 20 into the lower chamber 14 and exhaust air from the exhaust hole 22. A first cooling component 26 in need of cooling is located in a flow of air from the intake hole 22 to the exhaust hole 24 in the lower chamber. An intake communication hole 28 is formed on the intake hole 20 side of the partition wall 14 so as to communicate the lower chamber 14 and the upper chamber 16, and an exhaust communication hole 30 is formed on the exhaust hole 22 side of the partition wall so as to communicate the lower chamber 14 and the upper chamber 16. A second cooling component 34 in need of cooling is arranged between the intake communication hole 28 and the exhaust communication hole 30 of the upper chamber 16. A guide plate 32 is provided in the vicinity of the intake communication hole 28 in the upper chamber 16.SELECTED DRAWING: Figure 1

Description

The present invention relates to an electric device, and more particularly to a cooling of a component in the electric device.

There are various types of electrical equipment, but some require cooling of internal parts. For example, in Patent Document 1, the inside of a substantially rectangular parallelepiped case is divided into two rooms, an upper room and a lower room, by a partition plate. A lower intake hole is formed at a position corresponding to the lower room of the front wall of this case, an exhaust hole is formed at a position corresponding to the lower room to the back of the case, and relatively heat is generated in the lower room. The lower room parts, which are often used, are arranged, and a fan is attached to the exhaust hole inside the case. By operating the fan, the air outside the case from the lower intake hole passes through the lower room and is discharged to the outside of the case through the exhaust hole. This movement of air cools the lower chamber parts. A large heat sink mounting hole connecting the upper room and the lower room is formed in the partition plate, and the heat sink is located in this mounting hole so that the heat sink is located in the lower room and the upper surface is exposed to the upper room. There is. There is a gap between the mounting hole and the heat sink so that air can pass through. On the upper surface of the heat sink in the upper room, a semiconductor module which is a part of the upper room component arranged in the upper room and which generates a relatively large amount of heat is attached, and other upper room parts are arranged in the upper room. There is. The air flow in the lower chamber due to the operation of the fan cools the heat sink and cools the semiconductor module on top of the heat sink. An upper air intake hole is formed at the position of the front wall corresponding to the upper room. The air introduced from the upper intake hole by the operation of the fan passes through the upper chamber, enters the lower chamber through the gap between the mounting hole of the partition wall and the heat sink, and is exhausted from the exhaust hole. The air flow from the upper room to the lower room also cools the other upper room parts in the upper room.

Japanese Patent No. 3076220

According to the technique of Patent Document 1, the parts in the upper and lower chambers can be efficiently cooled, but the upper intake hole is provided at the position corresponding to the upper chamber of the front wall, and the upper intake hole is provided at the position corresponding to the lower chamber. Lower intake holes shall be formed at the respective positions. Two types of intake holes must be provided on the front wall, which is cumbersome to manufacture and unfavorable in terms of design. It is also possible to stop forming the upper intake hole and provide a communication hole connecting the upper room and the lower room near the front wall of the partition wall to introduce the air from the lower intake hole to the upper room as well. It is conceivable that the lower room communicates only with the gap between the mounting hole of the partition wall and the heat sink, so even if the fan is operated, air flow is poor and the parts in the upper room are cooled well. It may not be possible. In order to improve this, it is necessary to use a large fan with a large air volume, but if you play it, the parts in the lower room will be cooled excessively, and the parts in the lower room and the upper room Cannot be cooled properly.

An object of the present invention is to provide an electric device capable of efficiently cooling both the parts in the upper room and the parts in the lower side in a case partitioned above and below without any design problem. To do.

The electrical device of one aspect of the present invention has a case with a hollow inside. A partition wall divides the inside of this case into a first room and a second room. The partition wall can partition the inside of the case up and down, or can partition it left and right. An intake hole and an exhaust hole are provided on the first chamber side of the case so as to face each other. A fan is provided in the case so that air is introduced into the first room through the intake hole and air in the first room is exhausted from the exhaust hole. The fan may be provided, for example, in the first room or outside the case. A first cooling-requiring component is provided in the first room so as to be located in the flow of air from the intake hole to the exhaust hole in the first room. A first communication hole is formed on the intake hole side of the partition wall so as to communicate the first room and the second room. A second communication hole is formed on the exhaust hole side of the partition wall so as to communicate the first room and the second room. A second cooling component is arranged between the first and second communication holes in the second room. A guide plate is provided in the vicinity of the first communication hole in the second room so as to guide the air from the first room to the second communication hole side. The guide plate may have a flat plate shape or a curved shape.

According to this electric device, when the fan is operated, a part of the air from the intake hole passes through the first room and is exhausted from the exhaust hole, so that the first cooling of the first room is required. The parts are well cooled. The rest of the air from the intake holes enters the second chamber through the first communication hole, is guided by the guide plate, enters the first chamber through the second communication hole, and is exhausted from the exhaust hole. Therefore, the second cooling-requiring component of the second room is also cooled. In particular, since the first and second rooms are not communicated with each other by the gap, but the first and second rooms are communicated with each other by the second communication hole, the fan on the first room side alone is used for the second. Air is introduced to the room side through the first communication hole. Moreover, since the guide plate is provided in the vicinity of the first communication hole, the air guided by the guide plate and entering the second room flows satisfactorily toward the second communication hole side. , The second cooling-requiring component of the second room is also satisfactorily cooled.

The guide plate can be formed together with the first communication hole by cutting the partition plate toward the second room side. With this configuration, the first communication hole and the guide plate can be formed at the same time, so that the production thereof becomes easy.

Further, a plurality of the guide plate and the first communication hole may be provided. With this configuration, the amount of air required for cooling can be sent to the second room according to the volume of the second cooling-requiring component and the arrangement position in the second room.

Another guide plate may be provided in the vicinity of the second communication hole so as to guide the air in the second room toward the first communication hole. With this configuration, the air that has reached the vicinity of the second communication hole can be satisfactorily guided to the first room, and the second cooling-requiring component of the second room can be cooled more satisfactorily. ..

As described above, according to the present invention, it is possible to satisfactorily cool the parts requiring cooling in any of the rooms without providing the intake holes in the two rooms.

It is a longitudinal side view of the electric appliance of 1st Embodiment of this invention. It is a partially omitted perspective view of the electric appliance of FIG. It is a partially omitted perspective view of the electric appliance of the 2nd Embodiment of this invention. It is a partially omitted vertical sectional side view of the electric appliance of FIG.

The electric device according to the first embodiment of the present invention is, for example, a power supply device, specifically, a power supply device for electroplating or a power supply device for a welding machine, and has a case 2 as shown in FIG. ing. The case 2 has a substantially rectangular parallelepiped shape, and includes first and second walls, for example, a front wall 4 and a back wall 6, which are located so as to face each other at intervals. The front wall 4 and the back wall 6 are, for example, rectangular, with a rectangular upper wall 8 connecting the upper ends of the front wall 4 and the back wall 6, and a rectangular lower part between the lower ends of the front wall 4 and the back wall 6. The walls 10 are connected. A rectangular side wall 12 connects one side of the front wall 4 and the back wall 6, the upper end of the side wall 12 is connected to one side of the upper wall 8, and the lower end of the side wall 12 is one side of the lower wall 10. It is connected to. A rectangular side wall (not shown) connects the other side of the front wall 4 and the back wall 6, the upper end of the side wall is connected to the other side of the upper wall 8, and the lower end of the side wall is the lower wall 10. It is connected to the other side.

In this case 2, for example, a rectangular partition wall 14 is horizontally arranged, one end thereof is connected to the middle of the front wall 4, the other end is connected to the back wall 6 halfway, and one side of the partition wall 14 is connected. It is connected to the middle of the side wall 12, and the other side of the partition wall 14 is connected to the middle of the side wall (not shown). The partition wall 14 partitions the inside of the case 2 into first and second rooms, for example, a lower room 16 and an upper room 18.

The front wall 4 in the lower room 16 is provided with an intake hole 20 so as to communicate the lower room 16 with the outside of the case 2. Further, a plurality of, for example, two exhaust holes 22 are formed in the back wall 6 in the lower room 16, and the lower room 16 and the outside of the case 2 are communicated with each other. A fan 24 is attached to each of these exhaust holes 22 on the outer surface side of the back wall 6. Further, in the lower room 16, a first cooling-requiring component 26, for example, a transformer, a capacitor, a reactor, a semiconductor module attached to a heat sink, or the like is mounted. The air introduced from the intake hole 20 into the lower chamber 16 by operating the fan 24 passes between each of the first cooling-requiring parts 26, and passes through the exhaust hole 22 and the fan 24 to the outside of the case 2. Will be discarded. Each first cooling-requiring component 26 is cooled by this air flow.

A first communication hole, for example, an intake communication hole 28 is formed at a position close to the front wall 4 of the partition wall 14, and communicates the lower chamber 16 and the upper chamber 18. Similarly, a second communication hole, for example, an exhaust communication hole 30, is formed at a position close to the back wall 6 of the partition wall 14, and communicates the lower chamber 16 and the upper chamber 18. As shown in FIG. 2, the intake communication hole 28 is a rectangular opening, one of its two longitudinal edges is located parallel to the front wall 4 side, and its two short edges are the side wall 12 and FIG. They are located parallel to these in the vicinity of the side walls not shown.

An induction plate 32 is formed in the upper chamber 18 from the entire longitudinal edge on the front wall 4 side. In the induction plate 32, for example, when the partition wall 14 is made of metal, when the partition wall 14 is cut into a rectangular shape in order to form the intake communication hole 28 in the partition wall 14, the longitudinal edge on the front wall 4 side is not cut. In addition, it is a rectangular shape raised on the upper chamber 18 side, and has an acute angle with respect to the partition wall 14 so that the tip thereof faces the upper wall 8 side.

Although not shown, the exhaust communication hole 30 is also formed in a rectangular shape having the same size as the intake communication hole 28. As described above, the intake communication hole 28 and the exhaust communication hole 30 are both large. A second cooling-requiring component 34 is arranged in the upper chamber 18 between the intake communication hole 28 and the exhaust communication hole 30. As the second cooling-requiring component, it is desirable that the second cooling-requiring component generates less heat than the first cooling-requiring component. For example, a substrate on which a circuit having less heat generation of the power supply device is formed can be used. Although only one second cooling-requiring component 34 is shown in FIG. 1, a plurality of second cooling-requiring components 34 are arranged between the intake communication hole 28 and the exhaust communication hole 30. You can also do it.

By operating the fan 24, the first cooling-requiring component 26 is cooled as described above. At the same time, a part of the air introduced from the intake hole 20 into the lower chamber 16 is introduced into the upper chamber 18 through the intake communication hole 28, collides with the guide plate 32, and the direction thereof is the back wall 6 It is changed to the side, hits the second cooling component 34, cools it, faces the back wall 6 side, enters the lower room 16 through the exhaust communication hole 30, and enters the case through the exhaust hole 22 and the fan 24. It is exhausted to the outside of 2. The second cooling component 34 is also cooled by this air flow.

Since a large exhaust communication hole 30 is formed without using a gap, the vicinity of the exhaust communication hole 30 can be made negative pressure by the operation of the fan 24 without using a large fan. Air is attracted to the upper chamber 18 from the intake communication hole 28. Moreover, since the direction of the attracted air is changed to the back wall 22 side by the guide plate 32, it efficiently flows toward the exhaust communication hole 30 and cools the second cooling component 34 satisfactorily. Moreover, since the guide plate 32 can be formed almost at the same time when the intake communication hole 28 is formed, it is not necessary to separately form the guide plate, and the guide plate 32 is the longitudinal edge of the exhaust communication hole 28. There is no need to attach it to the device.

The electric appliances of the second embodiment are shown in FIGS. 3 and 4. The same reference numerals are given to the parts equivalent to the components of the electrical equipment of the first embodiment, and the description thereof will be omitted. In the electrical equipment of this embodiment, as shown in FIG. 3, a plurality of square-shaped intake communication holes 28a are formed parallel to the front wall 4 instead of one intake communication hole 28. A guide plate 32a is formed on the edge of each intake communication hole 28a on the front wall 4 side. When a plurality of a of the second cooling-requiring parts 34 smaller than the second cooling-requiring parts 34 of the first embodiment are arranged, each of the second cooling-requiring parts 34a is individually and satisfactorily cooled. In this case, it is desirable to provide a plurality of intake communication holes 28a and a plurality of guide plates 32a.

Further, in the electric device of the second embodiment, the guide plate 36 is also provided on the edge of the exhaust communication hole 30 on the back wall 6 side. The guide plate 36 is for guiding the air that has moved to the back wall 6 side satisfactorily from the exhaust communication hole 30 into the lower chamber 16, and the partition wall 14 so that the tip faces the upper wall 8 side. It is provided so as to form an acute angle with respect to. Similar to the guide plate 34 of the first embodiment, when the holes of the exhaust communication holes 30 are formed in the partition wall 14, they are formed almost at the same time. A plurality of the exhaust communication holes 30 and the guide plate 36 can be formed in the same manner as the intake communication holes 28a and the guide plate 32a.

In both of the above embodiments, the present invention has been implemented in a power supply device, but the present invention is not limited to this, and can be implemented in other electric devices. Although the case 2 uses a rectangular parallelepiped shape, the case 2 is not limited to this, and can be implemented for a polygonal columnar case or a columnar case. Further, in the above embodiment, the partition wall 14 is arranged horizontally to partition the inside of the case 2 vertically, but the partition wall 14 is arranged vertically in the center of the case 2 to partition the room into the left and right. You can also. In this case, the intake hole 28 and the exhaust hole 30 are provided on the upper wall 8 and the lower wall 10. The intake communication holes 28 and 28a and the exhaust communication holes 30 are rectangular or square, but are not limited to these, and for example, circular or elliptical ones can be used. Even in that case, the guide plate can be formed in a state where the guide plate is connected to a part of the edges of the circular or elliptical intake communication hole and the exhaust communication hole. Alternatively, a guide plate formed separately from the intake communication hole and the exhaust communication hole may be formed on the partition wall 14 in a state of being separated from the communication hole for exhaust. The guide plate is shown as a flat plate, but the guide plate is not limited to this, and for example, a bowl-shaped curved guide plate can be used. Although the fan 24 is provided outside the case 2, it can also be provided inside the case 2.

2 Case 14 Partition wall 16 Lower room (1st room)
18 Upper room (second room)
20 Intake hole 22 Exhaust hole 24 Fan 26 First cooling required part 28 Intake communication hole (first communication hole)
30 Exhaust communication hole (second communication hole)
32 Guide plate

Claims (4)

A case with a hollow inside and
A partition wall that divides the inside of the case into a first room and a second room,
Intake holes and exhaust holes provided facing the first room side in the case,
A fan provided in the case, which introduces air into the first room through the intake hole and exhausts air from the first room through the exhaust hole.
A first cooling component provided in the first room so as to be located in the flow of air from the intake hole to the exhaust hole in the first room.
A first communication hole formed so as to communicate the first room and the second room on the intake hole side of the partition wall.
A second communication hole formed so as to communicate the first room and the second room on the exhaust hole side of the partition wall.
A second cooling component placed between the first and second communication holes in the second room,
In the vicinity of the first communication hole in the second room, a guide plate provided so as to guide the air from the first room to the second communication hole side is provided.
Electrical equipment to have. In the electric device according to claim 1, the guide plate is an electric device formed together with the first communication hole by cutting the partition plate toward the second room side. In the electric device according to claim 1 or 2, the guide plate and the first communication hole are provided in a plurality of electric devices. In the electrical device according to any one of claims 1 to 3, another guide plate is provided in the vicinity of the second communication hole so as to guide the air in the second room toward the first communication hole. Electrical equipment.

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