JPS586336A - Enclosed switchboard - Google Patents

Abstract

PURPOSE:To improve the corrosion preventing property of the switchboard by a method wherein the air in a closed cabinet is forcibly led through a piping to the outside of the cabinet in order to be cooled and in addition sent back through a surge-tank in the cabinet at the enclosed switchboard, which requires forced cooling. CONSTITUTION:In the switchboard enclosed in the cabinet 1 in which an electrical apparatus 11 heated by an electric resistance generating heat by energizing and the like are required to be forcibly cooled down below the determined temperature and housed, a cooling fan 9 for forcibly moving the air with raised temperature in the closed cabinet 1 is provided. Cooling fins 23 are provided at the intermediate part of a cooling duct 22, which leads the air moved by said fan 9 to the outside of the cabinet 1, in order to cool said air firstly. The air firstly cooled at the cooling fins 23 is sufficiently cooled at a cooling tank 25, to which a cooler 28 is connected. After that, the sufficiently cooled air is led into the surge-tank 37 in order to be rendered uniform pressure and henceforth to send back into said cabinet 1.

Description

【発明の詳細な説明】 本発明は防食構造の閉鎖配電盤（１関する。[Detailed description of the invention] The present invention relates to a closed switchboard (1) with anti-corrosion structure.

閉鎖配電盤に収納される王沖１路の強電機器や母線・導
体は大電流を通電するためＴ１］、気抵抗による発熱か
を）るのでこれを却定の温度」１昇値以下とするためｆ
：け強制風冷式を採用して、積極的に外気を採り入れ、
発生した熱を奪いとり、排出する方法がとられていた。The high-power equipment, busbars, and conductors of Oki 1st Road, which are housed in a closed switchboard, carry large currents and generate heat due to air resistance. f
:Uses a forced air cooling system to actively draw in outside air.
A method was used to capture and exhaust the generated heat.

ところが、海に近い場合１：は海塩粒子や砂塵の侵入が
あり、Ｉ某地帯では腐食性ガスが壕だ地熱発電所では硫
化水素ガスがあるため、冷却用の外気採用Ｃ二より腐食
も促進される欠点かを）った。However, if you are close to the sea, sea salt particles and sand dust may enter, and in certain areas, corrosive gas may be present.In geothermal power plants, there is hydrogen sulfide gas, so using outside air for cooling is more likely to cause corrosion than in C2. (Which disadvantages are promoted?)

第１図は従来の閉鎖配’ｌｆ、盤の強制風冷式の一実施
例断面図である。FIG. 1 is a cross-sectional view of an embodiment of a conventional closed panel and forced air cooling type panel.

箱体１．ベース２．扉３．背面板４．防虫網５゜しやへ
い板６９通気［］７．フィルター８．冷却ファン９．風
尋用、電気機器１１．外気１２．冷却空気１３、上昇空
気１４　、排気１５よす構成される。Box body 1. Base 2. Door 3. Back plate 4. Insect screen 5° shield plate 69 ventilation []7. Filter 8. Cooling fan9. For air conditioning, electrical equipment 11. Outside air 12. It is composed of cooling air 13, rising air 14, and exhaust air 15.

本発明の目的Ｆｉ、瓶食糧食環境置されそれに耐える防
食性能のよい閉鎖配電盤の提供１−ある。The object of the present invention is to provide a closed switchboard with good anti-corrosion performance that can be placed in a bottled food environment and withstand the environment.

以１本発明を第２図に示す一実施例により、その構成を
説明する。The structure of the present invention will now be explained with reference to an embodiment shown in FIG.

箱体１．ベース２　＋　ｋｎ　３　＋背面板４．冷却フ
ァン９．電気機益１１．冷却空気１３．上昇空気１４．
移動空気１６．移動空気１７．冷却降下空気流１８．冷
却降下空気１９　、サージタンク空気２０　、サージタ
ンク流出空気２１．冷却用ダクト２２．冷却用フィン２
３　。Box body 1. Base 2 + kn 3 + back plate 4. Cooling fan9. Electrical benefits 11. Cooling air 13. Rising air14.
Moving air16. Moving air17. Cooling descending air flow18. Cooling descending air 19, surge tank air 20, surge tank outflow air 21. Cooling duct 22. Cooling fin 2
3.

冷却フィン２４．冷却タンク２５．冷却風２６　、吸気
２７゜クーラー２８．連結管２９　、連結管３０１ベー
ス３１　、冷却ダクト３２．ベース３３．冷却空気３４
．冷却空気流３５、連結ダクト３６．サージタンク３フ
、ベース３８゜連結ダクト３９．ガス吸着剤４０より構
成される。Cooling fins 24. Cooling tank 25. Cooling air 26, intake air 27° cooler 28. Connecting pipe 29 , connecting pipe 301 base 31 , cooling duct 32 . Base 33. cooling air 34
．． Cooling air flow 35, connecting duct 36. Surge tank 3F, base 38° connection duct 39. It is composed of a gas adsorbent 40.

本発明のように常時ｒｔｓ：食環境の雰囲気を呼吸しな
いように箱体を缶閉構造に構成した場合、電気機器等か
らの発熱を外部に放散しないと温度が上＃：１．　Ｌ、
値、）で使用できなくなってし斗う。電気機器の４４８
造により、局部的なＹ／ｉＡ度上昇が例えば１０５ｄり
であったとするとこ！！、を強制冷却でこの値以下に連
続的に抑制する必要がある。このだめの冷却の空気（−
と空気温ｔＷの低下イｔｔｉ保が必要となる。When the box body is configured to be closed so as not to breathe the atmosphere of the food environment as in the present invention, the temperature will rise unless the heat generated from electrical equipment is dissipated to the outside. #: 1. L,
value, ) is no longer available. 448 of electrical equipment
Suppose that due to the structure, the local Y/iA degree increase is, for example, 105d! ! , must be continuously suppressed below this value by forced cooling. The cooling air in this tank (-
Therefore, it is necessary to keep the air temperature tW from decreasing.

今電気室の空気流目１とが１５℃のとき、外気との入７
１替りがあり、′畠に１５℃１−保て１与るとしたとき
、この１５°Ｃに対して１０５　ｄｌ−１−１−昇する
電気品を冷却した場合に密閉され／仁閉幀配電盤内では
３０ｄ９程Ｉ及のｑ？気＆’、Ａ度の上昇がψ）るもの
としだとき、これを冷却ダクト１′：、よりこの空気を
外部へ導き、冷却フィンにより冷却１７たり、冷却タン
ク内に冷却ダクトを入ノ′１て、冷却すること（二より
十分な冷却をする。Now, when the temperature of the air flow number 1 in the electrical room is 15℃, the inflow of outside air 7
There is an alternative, if we assume that 15°C 1-1 is applied to the temperature, then when an electrical item that rises by 105 dl-1-1-1 is heated to 15°C, it will be sealed. In the switchboard, about 30d9 I and q? When the rise in air &', A degree ψ) begins, this air is guided to the outside through a cooling duct 1' and cooled by cooling fins, or a cooling duct is inserted into a cooling tank. 1. Cool down (2. Cool sufficiently.

このよう１−シたあと−リージタンクに入れ圧力を均宿
化り、／ζあとでＰ］Ｉｊｆ玲却用空冷却して閉鎖配電
盤内に仄し２てやること１１より、良好な空気で電気機
器晴・をノｊ１．定の温度上、ｊ、−＋値以下で使用す
ることができる、これ（二よる防食作用から防穫できる
。After doing this, the pressure is equalized by placing it in a leakage tank, and after that, the pressure is equalized, and after that, the air is cooled and placed in the closed switchboard. From 11. Equipment Haru・wo no j1. It can be used above a certain temperature and below the -+ value of j, and can be protected from the anticorrosion effect due to this.

また、閉鎖配電盤の〃ｎを開閉したことにより、外気を
閉鎖配′１（Ｌ盤内に採り入れることとなるので、この
空気に包含される腐食性ガスを除却するだめのガス吸光
剤を収納し、繰り返し循環するうちに浄化作用が行なわ
れることとなる。In addition, by opening and closing the closed switchboard 〃n, outside air is drawn into the closed switchboard 1 (L), so a gas light absorber is stored to remove the corrosive gas contained in this air. As the water is circulated repeatedly, the purifying action will take place.

第３図は空気流による放熱効果を説明するものである。FIG. 3 explains the heat dissipation effect due to air flow.

電線の許容電流は温度上昇との関係で求められ温度上昇
は空気の汗４速との関係で放熱量が示される、今風法を
放熱係数との関を示すと下式になる。The allowable current of an electric wire is determined in relation to the temperature rise, and the heat radiation amount is expressed in relation to the temperature rise in relation to the sweat rate of the air.The relationship between the modern method and the heat radiation coefficient is expressed by the following formula.

架空電線の許容電流１ 風速Ｖ（ｌ、／８）のときの対流による熱放散係数ら 一−−−−−−−■ Ｗ８−日射１ｍｔ　（Ｗ／Ｃ＋４　） ｄ−電線直イ羊（、ｍ） θ−温Ｊｔ土→＝１．（ｄる９） ｂ−電線の長さ（ｒＭ） η一完全黒体の輻射係数に対する索線材料のそれどの比 Ｒ−最Ｐ：温度における電線の交流実効抵抗（Ω／Ｔ、
ｃ＋＋＋） Ｔ−周囲温度（’Ｃ） ■＝風速（ｍ／５）Ｉ−電流（Ａ） ２ｎ１／８を１００チとしたときの風速の変化を放熱係
数の変化で求めたものである。Allowable current of overhead wire 1 Heat dissipation coefficient due to convection at wind speed V (l, /8) etc. W8 - Solar radiation 1 mt (W/C + 4) d - Wire straight line (, m ) θ−warm Jt soil→=1. (d9) b - Length of the wire (rM) η - Ratio of each cable material to the radiation coefficient of a perfect black body R - Maximum P: AC effective resistance of the wire at temperature (Ω/T,
c+++) T - Ambient temperature ('C) ■ = Wind speed (m/5) I - Current (A) The change in wind speed when 2n1/8 is set to 100 degrees is determined by the change in the heat radiation coefficient.

また第４図は冷却空気ｈ）を説明するものである発生熱
量なＫｃａｌ／Ｊで表わしたとき、冷却Ｃ１要する空気
量Ｑは１５°Ｃの４Ｆ気である場合下式となる。Further, FIG. 4 shows the amount of generated heat (Kcal/J) for explaining the cooling air h). When the amount of air Q required for cooling C1 is 4F air at 15° C., the following equation is obtained.

Ｈ／Ｋ　（ＫＣａ１／Ｌ　）　＝　ＱＸ　Ｏ，２９Ｘ　
△ｆ−−−−−−■Ｑ−理想冷却空気計（ｎ？／Ｌ＞ △ズー俤埠空気の温度差（ｄ４ｇ　） Ｈ−発生Ｍｙ　蛍（ＫｔａＪ−／Ｊ　）Ｋ−冷却用フィ
ン２３の構造や伝熱面積によって定丑る係数 上式をＩ　Ｋ　ａＪ／４当りで求めたものを線Ｂで示し
たものである。これｆ二より冷却ファンの風量が決定さ
れる。H/K (KCa1/L) = QX O, 29X
△f---■Q-Ideal cooling air meter (n?/L> △Difference in temperature of Zu-Toubu air (d4g) H-Generation My Firefly (KtaJ-/J) K-Cooling fin 23 The above equation with constant coefficients depending on the structure and heat transfer area is calculated per I KaJ/4 and is shown by line B. From this f2, the air volume of the cooling fan is determined.

また本発明では冷却フィンと、冷却ファンを閉鎖配電盤
上部の配管部に移しても、！、た２ケ所にて冷却しても
効果は同じである０ 以上のように本発明によれば電気室を環境改善しなくて
よく、経済的で防食のすぐれた閉鎖配電盤を得ることが
できる。In addition, with the present invention, even if the cooling fins and cooling fan are moved to the piping section above the closed switchboard! The effect is the same even if cooling is performed at two locations.As described above, according to the present invention, there is no need to improve the environment of the electrical room, and an economical closed switchboard with excellent corrosion protection can be obtained.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来の自然冷却形閉鎖配電盤の構成を示す説明
、第２図は本考案（二よる閉鎖配電盤の構成一実施例を
示す説明図、第３図は風速と冷却の放散係数を説明する
グラフ、第４図は発熱量と冷却風量を説明するグラフで
ある。 １・・・箱体　　　２・・・ベース　　３・・・扉４・
・・背面板　　５・・・防虫網　　６・・・しやへい板
７・・・通気口　　　８・・・フィルター　　９・・・
冷却ファン川・・風導　　　月・・・電気機器　１２・
・・外気１；３・・・冷却借気　１４・・・−１−昇空
気　１５・・・排気１６・・・移動空気　】７・・・移
動空気１８・・・冷却降］・空気流　１１）・・・冷却
降下空気２（］・・・ザサージンク空気　２１・・・サ
ージタンク流出空気２２・・・冷却用ダクト２３・・・
冷却用フィン２４・・・冷却フィン　　　２））・・・
Ｑ却タンク２６・・・冷却風　　ｚ７・吸気　　　２８
・・クーラー２１）・・・連結管　　：３（Ｊ・・・、
＋Ｉｉ結宕　　３１・・・ベース；３２・・・冷却ダク
ト３：３・・・ベース　　３・１・・・冷却壁気３５・
・・冷却空気流　　　：３（）・・・連結ダクト；３７
・・・サージタンク　　３８・・ベース３））・・連結
ダクト４（＋・・・ガス吸着創面１１すＡ・・・風速ど
熱故敗係数の変化線Ｂ　・・・発熱）ｓｌｔ一定・渦Ｊ
Ａ１−差による冷却風情の変化 （７３１７）　　代理人　弁理士　則　近　意　佑（ほ
か１名）第１図 第２図 第３図 風　速　（、′ｎ７′Ｓ）Figure 1 is an explanatory diagram showing the configuration of a conventional naturally cooled closed switchboard. Figure 2 is an explanatory diagram showing an example of the configuration of a closed switchboard according to the present invention. Figure 3 is an explanation of wind speed and cooling dissipation coefficient. Figure 4 is a graph explaining the amount of heat generated and the amount of cooling air. 1...Box 2...Base 3...Door 4.
・・Back plate 5・Insect screen 6・Shiyahei board 7・Vent hole 8・Filter 9・・
Cooling fan...Wind guide Moon...Electrical equipment 12.
...Outside air 1;3...Cooling borrowed air 14...-1-Rising air 15...Exhaust air 16...Moving air ]7...Moving air 18...Cooling down]・Air flow 11 )...Cooling descending air 2(]...The surge air 21...Surge tank outflow air 22...Cooling duct 23...
Cooling fin 24...Cooling fin 2))...
Q cooling tank 26...Cooling air z7/Intake 28
...Cooler 21)...Connecting pipe: 3 (J...,
+Ii Yugo 31...Base; 32...Cooling duct 3:3...Base 3.1...Cooling wall air 35.
...Cooling air flow: 3 ()...Connection duct; 37
...Surge tank 38...Base 3))...Connection duct 4 (+...Gas adsorption wound surface 11A...Wind speed and heat failure coefficient change line B...Heat generation) slt constant/vortex J
A1 - Change in cooling air quality due to difference (7317) Agent: Patent attorney Noriyuki Chika (and 1 other person) Figure 1 Figure 2 Figure 3 Wind speed (,'n7'S)

Claims (1)

【特許請求の範囲】[Claims] 密閉した箱体内の空気な送気ファンにより強制的に移動
させ、この空気を管路により外部へ導き冷却させ、さら
に管路な冷却室内を通過させたのちサージタンクを経て
箱体内に戻すことを特徴とする閉鎖配電盤。The air inside the sealed box is forcibly moved by a fan, the air is guided to the outside through a pipe to be cooled, and after passing through the cooling chamber, which is a pipe, it is returned to the box via a surge tank. Features a closed switchboard.