Disk structure

Abstract

To prevent air exhausted from an exhaust port of one board from flowing into the other board, and improve cooling efficiency of the board.SOLUTION: An outdoor-mounted switchboard 1 consists of a PCS board 4 and a DC board 5 side by side. At the top of the enclosures 6, 7 of the boards 4, 5, eaves arranged at approximately the same height are formed. The enclosure 6 includes an air intake port (intake hole / opening), which is driven by a fan 1 and draws in air from below the eaves, and an exhaust port formed in a floor plate 3b. The enclosure 7 includes an exhaust port that exhausts above eaves 12a and an intake hole group 40 formed in the lower part of an opening / closing door 9.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a structure of a panel that houses various electrical devices such as a power conversion device, and particularly to a structure of an outdoor installation type panel provided with a roof.

Background Art

[0002] The panel of Patent Document 1 includes a pair of horizontally connected panels a and b. A transformer is housed in one panel a, and electrical devices including heat generating devices such as a switch, a relay, instruments, an operating member, and a power conversion device are housed in the other panel b.

[0003] A ventilation duct is provided at the upper part of the housing of panel a, and outside air is taken into the housing from the ventilation duct of panel a by driving an intake fan. On the other hand, an exhaust port covered with a duct is formed at the upper part of the housing of panel b.

[0004] A partition member that restricts the flow of outside air taken in from the ventilation duct of panel a is provided at the connection part between panels a and b. That is, the upper space between panels a and b is blocked by the partition member, and a communication part that opens the lower space and allows air to flow into the space between panels a and b is formed.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] According to the panel structure of Patent Document 1, the outside air taken into panel a from the ventilation duct flows into panel b from the communication part, cools the heat generating devices by natural air cooling due to the chimney effect, and is exhausted from the exhaust port. However, the cooled air exhausted from the exhaust port may be taken into the ventilation duct and flow into panels a and b. This may reduce the cooling efficiency inside the panel.

[0007] This invention was made to solve the problems of the conventional method, and aims to improve cooling efficiency by suppressing the flow of air exhausted from the exhaust port of one panel into the other panel. [Means for solving the problem]

[0008] (1) The present invention relates to a panel structure comprising a pair of enclosures for housing electrical equipment connected together, Each of the housings is provided with a canopy formed on the upper part, One of the housings has an air intake port that draws in air from below the eaves, An exhaust port formed at the bottom, Equipped with, The other housing has an exhaust port that exhausts air above the eaves, An air intake is formed at the bottom, It is characterized by having the following features.

[0009] (2) One aspect of the present invention is characterized in that the air intake is formed in the lower part of one of the eaves portions.

[0010] (3) Other aspects of the present invention are: On the other hand, the aforementioned canopy portion has an opening formed at its tip. A cover plate is positioned at a predetermined distance from the opening, The system comprises a mesh plate provided between the opening and the closing plate, The lower end of the aforementioned sealing plate is open, allowing air to be drawn into the interior.

[0011] (4) In yet another embodiment of the present invention, The other awning portion has an opening formed at its tip. A cover plate is positioned at a predetermined distance from the opening, The system comprises a mesh plate provided between the opening and the closing plate, The exhaust port is characterized in that it is provided between the upper end of the blocking plate and the upper end of the mesh plate.

[0012] (5) In still another aspect of the present invention, one of the said cabinets cools internal electrical equipment by forced air cooling from above to below by driving a fan provided at the bottom, and the other said cabinet is characterized by cooling internal electrical equipment by natural air cooling from below to above.

Advantages of the Invention

[0013] According to the present invention, the inflow of air exhausted from the exhaust port of one board into the other board is suppressed, and it becomes possible to improve the cooling efficiency.

Brief Description of the Drawings

[0014] [Figure 1] Front view of the switchboard according to the embodiment of the present invention. [Figure 2] (a) is a cross-sectional view taken along line A-A of FIG. 1, and (b) is a cross-sectional view taken along line B-B of (a). [Figure 3] Cross-sectional view taken along line C-C of FIG. 1. [Figure 4] (a) is a detailed view of part D-D of FIG. 2(a), and (b) is a detailed view of part E-E thereof. [Figure 5] (a) is a detailed view of part F-F of FIG. 3, and (b) is a detailed view of part G-G thereof.

Modes for Carrying Out the Invention

[0015] ​​​​​​​​​The enclosures 6 and 7 of each panel 3 and 4 are constructed using frames, with double-hinged doors 8a on the front and back of enclosure 6, and single-hinged doors 8b on the front and back of enclosure 7.

[0018] Furthermore, as shown in Figures 2 and 3, the enclosures 6 and 7 are covered inside the frame by a pair of left and right side plates 3a, 5a, roof sections 9, 10, and floor plates 3b, 5b (one of the side plates 5a is not shown), and have canopy sections 11a, 11b and 12a, 12b extending in the front-rear direction from the front and rear ends of the roof sections 9, 10.

[0019] In this structure, ventilation passages 20 and 21 are formed within the roof sections 9 and 10, and the eaves sections 11a and 11b and 12a and 12b are formed at the same height. Furthermore, eaves section 11a and 12a are arranged side by side, while eaves section 11b and 12b are arranged side by side.

[0020] ≪Cabinet 6≫ The enclosure 6 will be explained based on Figures 2 and 4. Electrical equipment that generates a relatively large amount of heat, such as reactors, power converters, and transformers, will be installed inside this enclosure 6.

[0021] As a cooling structure, as shown by arrows P1 to P6 in Figure 2, a forced air cooling system is employed, where the air is directed from the roof 9 towards the floor (towards the floorboard 3b) by the drive of a fan 18. Inside the enclosure 6, as shown in Figure 2(a), a wind tunnel 13 is provided that communicates with the ventilation passage 20 (see Figure 4) inside the roof 9.

[0022] (1) In the front space S1 of the wind tunnel section 13, equipment requiring dust protection, such as a power converter 15, is placed. A unit heatsink 16 of the power converter 15 is also installed inside the wind tunnel section 13. As shown by arrows P1 and P2, the unit heatsink 16 is cooled by the air flowing into the wind tunnel section 13 from the ventilation passage 20. This structure cools the power converter 15.

[0023] Furthermore, as shown in Figure 2(b), a pair of the aforementioned fans 18 are installed on the floor plate 3b of space S1. These fans 18 have intake holes (not shown) on their sides and, as shown by arrows P3 and P4 in Figures 2(a) and 2(b), they draw in air from inside the wind tunnel section 13 after the unit heat sink 16 has cooled and exhaust it from the exhaust port 19 on the floor plate 3b.

[0024] For equipment requiring greater dust protection, a sealed space may be provided via the heat exchanger 14, and the power converter 15 may be cooled by the air cooling of the heat exchanger 14.

[0025] (2) A transformer 17 is installed on the floor plate (bottom) 3b of the rear space S2, as shown in Figures 2(a) and 2(b). This transformer 17 is positioned between the fans 18 and is adjacent to the intake port of each fan 18.

[0026] Here, the upper part of the wind tunnel section 13 has a space (not shown) formed on the side of space S2. Therefore, the air that flows into the wind tunnel section 13 due to the driving of each fan 18 is branched in the direction of space S2, as shown by arrow P5.

[0027] The air branched here flows downward, as shown by arrow P6, to cool the transformer 17. Furthermore, because the transformer 17 is adjacent to the intake port, it is also cooled by the airflow indicated by arrow P3, which is drawn in from within the wind tunnel 13. In this respect, the transformer 17 has a double cooling structure, cooled by both upward airflow (arrow P6) and lateral airflow (arrow P3).

[0028] (3) The canopy sections 11a and 11b will be described based on Figure 4. Figure 4(a) shows the canopy section 11a extending forward from the roof section 9, and Figure 4(b) shows the canopy section 11b extending rearward from the roof section 9. Support frames 21c are fixed to the upper ends of the front and rear frames 21a and 21b of the housing 6 using connecting bolts 23 and nuts 24.

[0029] At this time, the lower plate 9b of the roof section 9 is fastened together with the support frame 21c, and the upper plate 9a is fixed to the upper end of the support frame 21c using connecting bolts 22. Ventilation holes 21d are formed in this support frame 21c. Here, the portions extending from the upper and lower plates 9a and 9b in the front-rear direction of the ventilation holes 21d are called canopy sections 11a and 11b.

[0030] The canopy section 11a comprises upper and lower plates 25a and 25b extending from the upper and lower plates 9a and 9b of the roof section 9, side plates 25c that close the sides of the upper and lower plates 25a and 25b, and a water droplet reflector 27 that prevents splashed rainwater from entering the interior. One end of the water droplet reflector 27 is fastened together with the lower plate 9b and the support frame 21c.

[0031] An opening C is formed at the front end (tip) of each of these plates 25a to 25c, while an air intake hole (air port) 26 is formed in the lower plate 25b. The opening C and the air intake hole 26 are covered with air filters 28 and 29 and are surrounded by mesh plates 30 and 31.

[0032] One end 30a of the mesh plate 30 is welded to a retaining plate 34 fixed to the upper plate 25a. On the other hand, one end 31b of the mesh plate 31 is welded to a retaining plate 32 fixed to the front frame 21a. The other ends 30b and 31b of both plates 30 and 31 are welded to a retaining plate 33, thereby connecting the two plates 30 and 31.

[0033] Furthermore, a cover plate 32 is positioned at a predetermined distance from the opening C, and a mesh plate 30 is positioned between the cover plate 32 and the opening C. The cover plate 32 is formed in an inverted L shape, with its upper end 32a welded to the upper inner surface of the side plate 25c, while its lower end 32b is left open to form the opening D.

[0034] Although the canopy section 11b is constructed in almost the same way as the canopy section 11a, the opening C, intake holes 26, mesh plates 30, 31, and closing plate 32 are omitted. In other words, the canopy section 11 is closed by the closing plate 50, and there are no intake holes 26 formed in the lower plate 25b, so it is not configured to take in outside air into the ventilation passage 20.

[0035] With this type of enclosure 6, when the fan 18 is driven, outside air flows into the eaves 11a from the opening C and the intake hole 26, as shown by arrows Q1 and Q2. That is, outside air is taken in from below the eaves 11a, flows into the ventilation passage 20 as shown by arrow Q3, flows into the wind tunnel 13, and after cooling the unit heat sink 16 and the transformer 17, is exhausted from the exhaust port 19.

[0036] Furthermore, by covering the opening C and the intake holes 26 with mesh plates 30 and 31, dust and other particles are removed from the incoming outside air, improving the dustproof performance inside the housing 6.

[0037] ≪Cabinet 7≫ The enclosure 7 will be described based on Figures 3 and 5. Inside this enclosure 7 are electrical devices that generate relatively little heat, such as control devices and circuit breakers / conductors for power distribution to other panels. Therefore, a natural air cooling system from the floor (floor plate 5b) to the eaves 12 is adopted as the cooling structure.

[0038] In other words, the chimney effect, which causes cold air to accumulate at the bottom and warm air to escape from the top, is utilized to provide ventilation from the bottom to the top of the housing 7. At this time, a group of intake vents (intake ports) 40 are formed at the bottom of the front and rear opening doors 8b, and the air taken into the housing 7 through the intake vents 40 is exhausted from the top of the eaves 12a after the electrical equipment housed inside has been cooled.

[0039] The canopy sections 12a and 12b will be explained based on Figures 5(a) and 5(b). These canopy sections 12a and 12b are constructed in a manner that is almost identical to that of canopy sections 11a and 11b, respectively.

[0040] Specifically, a support frame 21c is fixed to the upper end of the rear frame 21b using connecting bolts 23 and nuts 24. A ventilation hole 21d is formed in this support frame 21c, and an overhang portion 12a is positioned in front of the ventilation hole 21d.

[0041] The canopy section 12a comprises upper and lower plates 25a and 25b extending from the upper and lower plates 10a and 10b of the roof section 10, side plates 25c that close both sides of the upper and lower plates 25a and 25b, and a water droplet reflector 27 that prevents splashing rainwater from entering. Like the canopy section 11a, it is equipped with an opening C, an air intake hole 26, mesh plates 30 and 31, and a blocking plate 32.

[0042] However, the canopy portion 12a utilizes the space E between one end 32a of the sealing plate 32 and one end 30a of the mesh plate 30 as an exhaust port (hereinafter referred to as exhaust port E). Also, the canopy portion 12b, like the canopy portion 11b, omits the opening C, intake hole 26, mesh plates 30, 31, and sealing plate 32.

[0043] With this type of enclosure 7, the outside air drawn in through the intake vents 40 of the front and rear opening doors 8b, as shown by arrow P11 in Figure 3, flows into the ventilation passage 21 in the roof section 10 after the electrical equipment housed inside has cooled down, due to the aforementioned characteristics.

[0044] The air that flows in here flows toward the eaves 12a, as shown by arrow P13, because the eaves 12b is closed, and flows into the eaves 12a, as shown by arrow P14 in Figure 5.

[0045] Subsequently, the air that flows into the eaves 12a does not, due to the aforementioned characteristics, move towards the intake port 26, but flows along the upper plate 25a to the opening C, passes through the air filter 28 and mesh plate 30, and as shown by arrows P15 to P17, flows upward and is exhausted onto the roof 10 through the exhaust port E.

[0046] At this time, since panel 4 is drawing in air from below the eaves 11a, it does not draw in the air that has been exhausted from the eaves 12a of panel 5 onto the roof 10, thus preventing the exhausted air from panel 5 from flowing into panel 4.

[0047] In other words, although panels 4 and 5 have eaves 11a and 12a formed at the same height, the intake direction of eaves 11a and the exhaust direction of eaves 12a are different. As a result, the warm air exhausted from panel 5 is not drawn into panel 4, and in this respect, it is possible to improve the cooling efficiency inside panel 4.

[0048] It should be noted that the present invention is not limited to the embodiments described above, and can be modified and implemented within the scope of each claim. For example, the eaves portion 11a of the housing 6 does not necessarily need to have both the opening C and the intake holes 26, and may be provided with only one of them depending on the cooling efficiency of the electrical equipment housed inside. [Explanation of symbols]

[0049] 1…Outdoor-installed distribution board 4…PCS board 5…DC board 6,7…Cabinet 18...fan 19... Exhaust vent 26…Intake port 40…Intake vents C,D…Opening E...Space (exhaust vent) 25a…Upper and lower plates 25b…Side plate 30... Mesh plate 32... Blocking plate 32a...Top end 32b…lower end

Claims

1. A panel structure comprising a pair of enclosures for housing electrical equipment, Each of the housings is provided with a canopy section formed horizontally on its upper part, One of the housings has an air intake port that draws air into the housing from below the eaves, An exhaust port formed at the bottom, Equipped with, The other housing has an exhaust port that exhausts air above the eaves, An air intake is formed at the bottom, A panel structure characterized by having the following features.

2. The panel structure according to claim 1, characterized in that the canopy portion has the air intake port formed at its lower part.

3. On the other hand, the aforementioned canopy portion has an opening formed at its tip. A cover plate is positioned at a predetermined distance from the opening, The system comprises a mesh plate provided between the opening and the closing plate, The panel structure according to claim 1, characterized in that the lower end of the sealing plate is open and allows air to be drawn into the interior.

4. The other awning portion has an opening formed at its tip. A cover plate is positioned at a predetermined distance from the opening, The system comprises a mesh plate provided between the opening and the closing plate, The panel structure according to claim 1, characterized in that the exhaust port is provided between the upper end of the blocking plate and the upper end of the mesh plate.

5. On the other hand, the aforementioned enclosure cools the internal electrical equipment by forced air cooling from top to bottom, driven by a fan located at the bottom. The other enclosure is characterized in that the internal electrical equipment is cooled by natural air cooling from bottom to top, according to any one of claims 1 to 4.

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