Disk structure

Abstract

To provide a board structure that preferentially supplies cooling air to a high heat generating electric device and uses the cooling air to cool a heat-resistive electric device.SOLUTION: An outdoor installation type board comprises: upper air intakes C, D of a housing 2; an air duct part 12 which partitions the inside of the housing 2 into spaces F, B; a high heat generating electric device unit 20 in the space F; a high heat-resistant electric unit 40 in the space B; a fan 30 installed at a floor part 6 in the space B; and an air outlet 6a of the floor part 6 which is formed below the fan 30. A heat sink 21 of the high heat generating electric device unit 20 is installed in the air duct part 12. The air duct part 12 comprises an air outlet I on the loser side of the heat sink 21. A cover 30b of the fan 30 has an air outlet group formed in each of a front plate on the side of the air duct part, a side plate on the side of the high heat-resistant electric unit 40, and a back plate on the side of the air duct part.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to the structure of a board that cools electrical equipment arranged inside a housing by blowing air.

Background Art

[0002] The board of Patent Document 1 includes a plurality of electrical equipment units housed inside a housing and a blower that forcibly discharges air inside the housing, and a ventilation hole for taking in cooling air by driving the blower is formed in the door of the housing.

[0003] A duct for introducing the cooling air taken in from the ventilation hole is attached to the unit. Further, by installing a partition plate between the door and the duct, the inside of the housing is partitioned into a door side and a duct side.

[0004] Ventilation holes communicating with each of the ducts are formed in the partition plate. Here, the cooling air taken in from the ventilation hole is supplied to each of the units at a uniform air volume by passing through the ventilation holes.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The board structure of Patent Document 1 cools each of the units uniformly by the same configuration via ventilation holes and ducts as described above. Certainly, if there is no significant difference in the heat generation amount of each of the units, the board structure of Patent Document 1 is effective.

[0007] However, in order to cool each of the aforementioned units uniformly, if some of the aforementioned units use electrical equipment that generates a lot of heat, it may not be possible to cool that electrical equipment preferentially, which could lead to a decrease in cooling efficiency.

[0008] This invention was made to solve the problems of the conventional approach, and aims to improve cooling efficiency by preferentially supplying cooling air to high-heat electrical equipment and using that cooling air to cool heat-resistant electrical equipment. [Means for solving the problem]

[0009] (1) The present invention relates to a panel structure comprising a housing for electrical equipment, An air intake port is provided at the top of the housing to draw cooling air into the housing, The enclosure is partitioned to form a wind tunnel section into which the cooling air taken in at the intake port is introduced, A relatively high-heat generating electrical device is placed in one of the spaces partitioned within the aforementioned wind tunnel section, A heat sink for dissipating heat from the aforementioned electrical equipment, A relatively high-heat-resistant electrical device is placed in the other space partitioned off from the aforementioned wind tunnel section, A fan installed in the lower part of the other space, An intake vent formed at least on the side of the fan cover facing the high-heat-resistant electrical equipment, An exhaust port formed on the lower side of the fan, Equipped with, The heat sink is placed inside the wind tunnel section. The aforementioned wind tunnel section has an exhaust port formed below the heat sink. When the fan is driven, the cooling air drawn in from the intake port is taken into the air tunnel to cool the heatsink. The system is characterized by cooling the high-heat-resistant electrical equipment with the cooling air exhausted from the exhaust port.

[0010] (2) One embodiment of the wind tunnel section is: The other space is provided with a branching hole for branching the cooling air, It is characterized in that the high heat-resistant electrical equipment can be cooled by the cooling air branched from the branch holes.

[0011] (3) One aspect of the cover is a first intake hole formed on the side of the high heat-resistant electrical equipment, and a second intake hole formed at a location different from the first intake hole, and is provided with by increasing or decreasing the opening area of the second intake hole, the intake air volume of the first intake hole is adjusted, and it is characterized in that the air volume to the high heat-resistant electrical equipment can be adjusted.

Advantages of the Invention

[0012] According to the present invention, by preferentially supplying cooling air to the high heat-generating electrical equipment and using the cooling air to cool the heat-resistant electrical equipment, the cooling efficiency can be improved.

Brief Description of the Drawings

[0013] [Figure 1] Perspective view showing the housing of the switchboard according to the embodiment of the present invention. [Figure 2] Same internal view. [Figure 3] Same longitudinal sectional view. [Figure 4] Same cross-sectional view. [Figure 5] Rear perspective view of the same space B. [Figure 6] Front perspective view of the same space B.

Modes for Carrying Out the Invention

[0014] Hereinafter, the board structure according to the embodiment of the present invention will be described. This board structure is a suitable structure for an outdoor installation type board provided with a roof, and can be applied to, for example, a switchboard, a distribution board, a control board in which electrical equipment such as a power conversion device unit is housed, or a unmanned relay device, a cubicle device, etc.

[0015] ≪Configuration Example≫ In Figures 1 and 2, 1 shows an outdoor-installed panel to which the panel structure described above is applied. The enclosure 2 of this panel 1 is constructed using a frame, and has opening and closing doors 3 at the front and rear. The inside of the frame is covered by a pair of left and right side plates 4, an upper roof section 5, and a lower floor section 6. Each roof section 5 has canopies 7 and 8 extending from its front and rear ends, and the interior is partitioned by a wind tunnel section 12 (see Figure 3).

[0016] Here, a ventilation passage 10 (see Figure 3) is formed within the roof section 5. The wind tunnel section 12 is connected to this ventilation passage 10, while the front eaves section 7 has air intakes C and D that are connected to the ventilation passage 10.

[0017] (1) As shown in Figure 1, the canopy section 7 is constructed by attaching an L-shaped windbreak plate 7b to a grid-like frame 7a arranged between frames 5a and 5c. At this time, the lower surface of the frame 7a is not closed by the windbreak plate 7b, so an open air intake C is formed there to take in cooling air. Dust prevention measures are taken by attaching an air filter 15 and a mesh plate 16 to this air intake C.

[0018] Furthermore, a predetermined gap K (see Figure 3) is provided between the front surface of the frame 7a and the windbreak plate 7b. Since the lower end 7c of the windbreak plate 7b is open, an air intake D is formed on the front surface of the frame 7a to take in cooling air through the gap K. An air filter 15 and a mesh plate 16 are also attached to this air intake D to provide dust protection.

[0019] (2) As shown in Figure 3, the inside of the enclosure 2 is divided into a sealed space F at the front and a space B at the rear by the air tunnel section 12. Relatively high-heat generating electrical equipment units are placed in this space F. Here, as an example, a power conversion device (inverter device) unit 20 is placed inside. However, the heat sink 21 of the unit 20 is installed inside the air tunnel section 12.

[0020] On the other hand, relatively high-heat-resistant electrical equipment units (such as reactors and transformers) are located in space B. Here, as an example, a group of transformer units 40 are installed on the floor 6. As shown in Figure 4, this group of units 40 is arranged between a pair of fans 30. The floor 6 has exhaust holes 6a (see Figure 1) formed directly below each fan 30.

[0021] Each fan 30 comprises a fan body 30a and a fan cover 30b, the fan cover 30b being box-shaped. As shown in Figures 4 and 5, and as shown in Figures 5 and 6, intake holes 51 to 53 are formed on the front plate 30c on the wind tunnel section 12 side, the side plate 30d on the unit 40 side, and the back plate 30e on the opposite side of the wind tunnel section 12, with an intake hole group 52 facing the unit 40 side.

[0022] (3) As shown in Figure 3, the upper end opening G inside the wind tunnel section 12 is in communication with the air passage 10, allowing cooling air from the air passage 10 to be introduced. Hereinafter, the upper end opening G will be referred to as the air vent G.

[0023] The wind tunnel section 12 has a front plate 12a on the side of space F, a rear plate 12b on the side of space B, and side plates 12c (see Figure 5) that connect both sides of plates 12a and 12b. The upper ends of each of these plates 12a to 12c are welded to the top surface of the housing 2, and the lower ends of the front plate 12a and each side plate 12c are welded to the floor 6 of the housing 2. In other words, both plates 12a and 12c are installed vertically within the housing 2, dividing it into spaces F and B.

[0024] On the other hand, since the rear plate 12b is cut out near the unit 40 group, an exhaust port I is formed below the heat sink 21 in the air tunnel section 12, allowing the cooling air after the heat sink 21 has cooled to flow into space B. In addition, a branching hole H is formed near the upper end of the rear plate 12b to branch the cooling air in the air tunnel section 12 into space B.

[0025] ≪Airflow≫ The airflow inside the enclosure 2 will be explained based on Figures 3 to 6. When each fan 30 is powered on and driven, cooling air is drawn into the ventilation passage 10 from the front intake ports C and D, as shown by arrows E1 and E2 in Figure 3. At this time, since air filters 15 and mesh plates 16 are installed at intake ports C and D, dust and insects are prevented from entering the ventilation passage 10.

[0026] Subsequently, the cooling air taken into the ventilation passage 10 is drawn into the wind tunnel section 12 through the vent G, as shown by arrow E3. Here, the cooling air that flows into the wind tunnel section 12 is divided into the cooling air indicated by arrow E4 (main cooling air) that flows directly into the wind tunnel section 12, and the cooling air indicated by arrow E5 (sub-cooling air) that flows into space B through the branching port H.

[0027] First, regarding the cooling air indicated by arrow E4, it flows downwards within the wind tunnel section 12 and is supplied to the heat sink 21. In other words, the cooling air in the wind tunnel section 12 is preferentially used to cool the heat sink 21, and after the heat sink 21 has cooled, it is exhausted from the exhaust port I and flows into space B (see arrow E6).

[0028] Next, regarding the cooling air indicated by arrow E5, after branching off from the branching port H, it flows downward through space B and merges with the cooling air exhausted from exhaust port I near unit 40. The merging cooling air is then drawn in through the intake port groups 51-53 of each fan 30, as shown by arrows E7-E9 in Figures 4-6, and exhausted backward through exhaust port 6a, as shown by arrow E10 in Figure 3.

[0029] At this time, the intake vents 52 of each fan 30 are formed on the side plate 30d on the unit 40 side, and are therefore positioned opposite the unit 40. Consequently, the cooling air drawn into the intake vents 52 is supplied to the unit 40 and then flows around to be drawn in. As a result, the unit 40 is cooled using the cooling air indicated by arrow E4, which is preferentially supplied to the heat sink 21, and in this respect, the cooling efficiency is improved.

[0030] Furthermore, by increasing or decreasing the opening area of ​​the intake port groups 51 and 53, the amount of air intake from intake port group 52 can be adjusted. This allows the amount of air supplied to the unit 40 to be adjusted, enabling cooling according to the heat resistance of the unit 40. In addition, since the exhaust air is exhausted to the rear from the exhaust port 6a, it becomes less likely for the exhausted warm air to be drawn in from the intake ports C and D, which also improves the cooling efficiency.

[0031] It should be noted that the present invention is not limited to the above embodiments and can be implemented with modifications within the scope described in each claim. For example, depending on the heat resistance of the unit 40 and the airflow of the cooling air indicated by arrow E4, the cooling air after exhaust from the exhaust port I (arrow E6) may be sufficient, in which case it is not necessary to provide the branch holes H of the wind tunnel section 12. [Explanation of symbols]

[0032] 1...Outdoor installation type panel 2…Cabinet 6a... Exhaust port 12...Wind tunnel section 20,40…Electrical Equipment Unit 21… Heatsink 30...fan 30b...cover 51-53... Intake vent group C, D... Air intake ports F,B…Space H... Branch hole I... Exhaust port

Claims

1. A panel structure comprising an enclosure for housing electrical equipment, An air intake port is provided at the top of the housing to draw cooling air into the housing, The enclosure is partitioned to form a wind tunnel section into which the cooling air taken in at the intake port is introduced, One electrical device is placed in one of the spaces partitioned within the wind tunnel section, A heat sink for dissipating heat from one of the aforementioned electrical devices, The other electrical equipment is located in the other space partitioned off in the wind tunnel section, A fan installed in the lower part of the other space, An intake vent formed at least on the other electrical equipment side of the fan cover, An exhaust port formed on the lower side of the fan, Equipped with, The heat sink is placed inside the wind tunnel section. The aforementioned wind tunnel section has an exhaust port formed below the heat sink. When the fan is driven, the cooling air drawn in from the intake port is taken into the air tunnel to cool the heatsink. A control panel structure characterized by cooling the other electrical equipment with the cooling air exhausted from the exhaust port.

2. The aforementioned wind tunnel section is The other space is provided with a branching hole for branching the cooling air, The panel structure according to claim 1, characterized in that the other electrical equipment can be cooled by the cooling air branched from the branch hole.

3. The aforementioned cover is The first intake port formed on the other electrical equipment side, A second intake port is formed in a location separate from the first intake port, Equipped with, The amount of air intake from the first intake port is adjusted by increasing or decreasing the opening area of ​​the second intake port. The control panel structure according to claim 1 or 2, characterized in that the amount of airflow to the other electrical equipment can be adjusted.

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