201210965 六、發明說明： n 明戶斤屬系恃々頁3 發明領域 本發明係有關於熔融玻璃之減壓脫泡裝置、熔融玻璃 之減壓脫泡方法、玻璃製品之製造裝置及玻璃製品之製造 方法。 L ^c* ~mT ΦΙϊχ Ίί 發明背景 迄今，為了經成形之玻璃製品之品質的提升，在以熔 融槽將玻璃原料熔化後，於將熔融玻璃以成形裝置成形之 前’以去除於熔融玻璃内所產生之氣泡為目的而使用減壓 脫泡裝置。 前述減壓脫泡裝置，係藉由使熔融玻璃通過一内部已 保持在預定之減壓度的減壓脫泡槽内，使熔融玻璃内所含 有之氣/包以比較短的時間成長’並利用已成長變大之氣泡的 浮力使氣泡浮上於熔融玻璃的表面，藉使氣泡破裂於熔融玻 璃的表面’效率良好地從融熔玻璃去除氣泡之一種裝置。 利用前述減壓脫泡裝置以提高從熔融玻璃去除氣泡之 減壓脫泡效果時，就理論上而言，愈提高熔融玻璃上方之 氣體環境的減壓度（將氣體環境之絶對壓力降得愈低)應愈 能提兩減®脫泡之效果，減少熔融玻璃流體内之氣泡。但 是，實際上，融熔玻璃上方之氣體環境之減壓度到逹某一 階段的活，氣泡之生成速度會超過氣泡破裂所行之氣泡消 滅速度，而由於氣泡層在熔融玻璃表面肥大化，導致減壓 201210965 脫泡能力降低。如前所述般之現象稱為因過度減壓所致之 氣泡層的肥大化。而其結果導致熔融玻璃流體内之氣泡反 而增加。因此，能將減壓脫泡效果充分發揮之氣體環境的 減壓度範圍是狹小的，且減壓脫泡之效果也會因大氣壓之 變動等外在的要因而受到影響成了問題。 本發明者等為解決前述問題，經檢討結果發現：於融 熔玻璃表面因氣泡破裂而產生之氣體成分，會滯留於融熔 玻璃上方而導致減壓脫泡之效果降低。於融熔玻璃上方源 自融熔玻璃之氣體成分滯留的話，因熔融玻璃上方之氣體 環境中，源自融熔玻璃之氣體成分的分壓會變高，使已浮 上於熔融玻璃表面之氣泡變得難破裂，而使減壓脫泡之效 果降低。於是，本發明者等於先前已提案有：透過進行氣 體供給予減壓脫泡槽内之熔融玻璃的上方空間使產生氣體 的流動（氣流），來消除源自熔融玻璃之氣體成分的滯留，抑 制因過度減壓所致之氣泡層的肥大化，以提升減壓脫泡之 效果的技術（參考專利文獻1)。 先行技術文獻 專利文獻 專利文獻1 :國際公開第2009 / 107801號手冊 t發明内容3 發明概要 發明所欲解決之課題 本發明者等於先前已提案之專利文獻1中，於熔融玻璃 流通之減壓脫泡槽上部，設有至少透過2條連接管來連接之 201210965 氣體環境控制部，利用透過前述ϋ接管使減壓脫泡槽内 之溶融玻璃的上方空間與氣體環境控制部產生循環之氣 流’使源自㈣玻璃之氣體成分的滯留消除。於、 中’利用以横穿-Ρ扣部之上部空間的方式供給氣體予氣 體環境控騎錢生前錢流，朗，形姐連接減壓 脫/包槽與氣齡境控制部之連接管及氣體環境控制部。藉 以滿足如前所述之關係來供、給氣料氣體環境控制部，會 因文氏管效應(VentuH effeet)而於氣體環境控制部與減壓 脫泡槽之間產生壓力S，而II此壓力差使氣體環境控制部 與減壓脫泡槽内之熔融玻璃的上方空間產生循環之氣流。 另外，於氣體環境控制部及減壓脫泡槽之熔融玻璃的 上部空間之源自融熔玻璃之氣體成分的流動，暫且不論其 流速之程度’利用減壓脫泡槽之減壓操作，不論前述供給 氣體之有無皆會產生。又，減壓脫泡槽及氣體環境控制部 之溫度梯度也成為貢獻氣流於源自融炼玻璃之氣體成分的 因素之一。 於專利文獻1之方法中’氣體供給及其氣體供給之位置 雖成為前提，但如前所述般不論氣體供給之有無，源自融 熔玻璃之氣體的氣流是存在著的。因此而期待有與專利文獻 1之揭示有所區別的方法，該方法係儘可能不受氣體供給及 其位置的制約，而使氣體環境控制部及減壓脫泡槽之溶融玻 璃的上部空間之源自融熔玻璃之氣體成分的流動不滯留者。 源自上述背景之本發明’係以提供對熔融玻璃之減壓 脫泡效果優越之減壓脫泡裝置為目的，較具體而言，係以 201210965 提供一種熔融玻璃之減壓脫泡裝置為目的，該熔融玻璃之 減壓脫泡裝置係因過度減壓所致之氣泡層的肥大化而使減 壓脫泡效果降低已受防止者。 本發明係以使用前述之減壓脫泡裝置的熔融玻璃之減 壓脫泡方法、玻璃製品之製造裝置及玻璃製品之製造方法 的提供為目的。 用以解決課題之手段 本發明者等致力進行檢討之結果，如以下所述，發明 出未必需要進行氣體供給，利用將從熔融玻璃產生之氣體 之氣流予以整流，而將氣體流動之停滯減少的方法。 即，本發明係提供一種熔融玻璃之減壓脫泡裝置，該 熔融玻璃之減壓脫泡裝置係具備有内部氣壓設定成小於大 氣壓，並使已供至之熔融玻璃中之氣泡浮起及破裂的減壓 脫泡槽者；該熔融玻璃之減壓脫泡裝置設有： 中空構造之氣體環境控制部，其透過至少2條連接通路 而與較前述減壓脫泡槽中較熔融玻璃收納部更上方的空間 連接；及 減壓用排氣口，其形成於前述氣體環境控制部中； 該熔融玻璃之減壓脫泡裝置係於流入側連接通路出口 側的開口部周圍設置整流構件而構成者，該流入側連接通 路係供已自熔融玻璃產生的氣體從前述減壓脫泡槽往前述 氣體環境控制部流動者，該整流構件則調整前述氣體之氣 流。 於本發明之減壓脫泡裝置中，前述流入側連接通路係 201210965 於較前述氣體環境控制部之外周部更内側處，將減壓脫泡 槽之熔融玻璃收納部的上部空間與前述氣體環境控制部之 間予以連接而構成者。 於本發明之減壓脫泡裝置中，前述整流構件係以設有 整流壁部而構成者為宜，該整流壁部包覆前述流入側連接 通路出口側之開口部的至少半周，並將該開口部與前述氣 體環境控制部之外周部之間予以區隔。 於本發明之減壓脫泡裝置中，以於前述整流構件之前 述整流壁部内表面形成有一導引面而構成者為宜，該導引 面係誘導從前述減壓脫泡槽經由前述流入側連接通路出口 側之開口部往前述氣體環境控制部流動之氣體的氣流，使 其從前述氣體環境控制部導通至減壓脫泡槽之流出側連接 通路側者。 於本發明之減壓脫泡裝置中，前述整流構件之前述整 流壁部係以包圍前述流入側連接通路出口側之開口部全周 的方式形成者為宜。 於本發明之減壓脫泡裝置中，前述整流構件以具備導 入部及導出部而構成者為宜；該導入部將源自前述流入側 連接通路出口側之開口部的氣體導入該整流構件内部；該 導出部則將已由該開口部導入該整流構件内部之氣體往前 述氣體環境控制部導出。 於本發明之減壓脫泡裝置中，前述整流構件之形狀係 以管狀為宜。 於本發明之減壓脫泡裝置中，於前述流入側連接通路 7 201210965 之出口側的形成有開口部之位置中，令前述氣體環境控制 部之室内高度為Η且前述整流構件高度之最大值為h時，以 滿足l/4$h/H$3/4之關係為宜。 於本發明之減壓脫泡裝置中，於減壓脫泡槽中較熔融 玻璃收納部更上方的空間内，在前述至少2條連接通路的内 部及前述氣體環境控制部之内部中的任一處設置氣體供給 機構而成者為宜。 於本發明之減壓脫泡裝置中，以具備下述機構而構成 者為宜： 減壓室，其包圍前述減壓脫泡槽與前述氣體環境控制 部，且經真空吸引而使内部受到減壓； 減壓脫泡槽，其設置於該減壓室内，用以進行熔融玻 璃之減壓脫泡； 供給機構，其用以將熔融玻璃供至該減壓脫泡槽；及 送出機構，其用以將脫泡後之熔融玻璃送至下個步驟。 又’本發明提供使用前述減壓脫泡裝置之熔融玻璃之 減壓脫泡方法。本發明之熔融玻璃之減壓脫泡方法，係使 用則述之減壓脫泡裝置，而透過已設在流入側連接通路出 口側之開口部周圍的前述整流構件來調整前述氣體之氣 流，並使熔融玻璃進行脫泡處理者為宜；且該流入側連接 通路係供已自熔融玻璃產生的氣體從前述減壓脫泡槽往前 述氣體環境控制部流動者。 進而s之，本發明提供一種玻璃製品之製造裝置，該 玻璃製品之製造裝置具有： 8 201210965 前述之減壓脫泡裴置； 熔融機構，其設置於較該減壓脫泡裝置上游側，並將 玻璃原料炼融而製造出熔融玻璃； 成形機構，其設置於較前述減壓脫泡裝置下游側，並 將炫融玻璃予以成形；及 、, 緩冷卻機構，其使成形後之玻璃進行緩冷卻。 進而又，本發明提供一種玻璃製品之製造方法，該製 造方法包含以下步驟： 脫泡處理步驟，其利用前述之減壓脫泡裝置， 玻璃進行脫泡處理； ° 熔融步驟，其係於較前述減壓脫泡裝置上游側，使玻 璃原料熔融而製造出熔融玻璃； 成形步驟，其係於較前述減壓脫泡裝置下游側，使熔 融玻璃成形；及 緩冷卻步驟’其係使成形後之玻璃進行緩冷卻。 本發明之玻璃製品之製造方法，宜包含以下步驟： 脫泡處理步驟，其利用前述之減壓脫泡裝置，而透過 已设在流入側連接通路出口側之開口部周圍的前述整流構 件來調整w述氣體之氣流，並使溶融玻璃進行脫泡處理， 且該流入側連接通路係供已自熔融玻璃產生的氣體從前述 減壓脫泡槽往前述氣體環境控制部流動者； 溶融步驟’其係於較前述減壓脫泡裝置上游側，使玻 璃原料炫融而製造㈣融玻璃； 成形步驟，其係於較前述減壓脫泡裝置下游側，使熔 9 201210965 融玻璃成形；及 緩冷卻步驟，其係使成形後之玻璃進行緩冷卻。 發明效果 若依據本發明之減壓脫泡裝置，因能不靠氣體供給機 構之有無，而透過將從減壓脫泡槽内之熔融玻璃的上部空 間往氣體環境控制部流入之自熔融玻璃產生之氣體的氣流 做整流，來消除源自熔融玻璃之氣體成分的滯留，故能抑 制減壓脫泡效果的降低。又，透過源自熔融玻璃之氣體成 分的滯留被消除，因過度減壓所致之氣泡層肥大會變得難 以發生，故能使減壓脫泡槽内之減壓度提得較高，而能使 減壓脫泡的效果提升。進而言之，本發明之減壓脫泡裝置， 因係令為將整流構件設置於氣體環境控制部之流入側連接 通路之開口部周圍的構造之故，而使流動於減壓脫泡槽内 之熔融玻璃上部空間與氣體環境控制部的氣流之流速安定 化，能將源自熔融玻璃之氣體成分的滯留安定並消除，而能 抑制減壓脫泡性能之參差，使減壓脫泡的效果提升。 本發明之減壓脫泡方法，藉由使用前述減壓脫泡裝 置，能實現優越的減壓脫泡效果。 又，若為使用前述之減壓脫泡裝置的玻璃製品之製造 裝置及製造方法的話，則能提供高品質之玻璃製品。 圖式簡單說明 第1圖為結構圖，顯示與本發明相關之減壓脫泡裝置之 一例的概略縱截面構造，與於該裝置連接有成形裝置之狀 態。 10 201210965 第2圖係顯示適用於第1圖所示之減壓脫泡裝置之整流 構件的各實施形態者； 第2(a)圖係顯示第1實施形態之部份截面透視圖； 第2(b)圖係顯示第2實施形態之部份截面透視圖； 第2(c)圖係顯示第3實施形態之部份截面透視圖； 第2(d)圖係顯示第4實施形態之部份截面透視圖。 第3圖係顯示適用於第1圖所示之減壓脫泡裝置之整流 構件的各實施形態者； 第3(a)圖係顯示第5實施形態之部份截面透視圖； 第3(b)圖係顯示第6實施形態之部份截面透視圖； 第3(c)圖係顯示第7實施形態之部份截面透視圖； 第3(d)圖係顯示第8實施形態之部份截面透視圖。 第4圖係顯示適用於第1圖所示之減壓脫泡裝置之整流 構件的各實施形態者； 第4(a)圖係顯示第9實施形態之部份截面透視圖； 第4(b)圖係顯示第10實施形態之部份截面透視圖； 第4(c)圖係顯示第11實施形態之部份截面透視圖。 第5圖為流程圖，顯示與本發明相關之關於玻璃製品之 製造方法的步驟之一例。 第6圖為縱截面圖，顯示經使用於實施例之模擬分析的 減壓脫泡裝置之模式構造。 第7(a)圖係顯示實施例之氣流解析結果之圖，第7(b)圖 則係顯示比較例之氣流解析結果之圖。 第8圖為圖表，係將實施例及比較例的減壓脫泡槽内之 201210965 炼融玻璃上部空間的壓力經圖示化者。 圖為圖表，顯示關於實施例及比較例，其等之從減 壓脫泡槽經由⑼鏡接通路往氣體環境㈣部排出的氣 體(上游排出氣體)之趋，與從自減壓脫泡触由流入側連接 通路往氣體環境控制部排出的氣體(下游排出氣體)之流量。 第ίο圖係於習知之減壓脫泡裝置中流入側連接通路 連接於氣體環境控制部，且於氣體環境控制部之外周部形 成有二間時將於該空間與流入側連接通路與開口部附近 之氣流舉動模式地顯示之圖。 【實施方式】 用以實施發明之形態 以下，就與本發明相關之熔融玻璃之減壓脫泡裝置的 實把形態予以說明’但本發明並非受限於將於以下說明 之實施形態者。 第1圖係將與本發明相關之熔融玻璃之減壓脫泡裝置 之一例構造模式地顯示的緃截面圖。示於第1圖之減壓脫泡 裝置100，係用於以下製程者：將從熔融槽1所供至之熔融 玻璃G予以減壓脫泡，並將之以連續地供給於後製步驟之成 形裝置200。 本實施形態之減壓脫泡裝置100,具有一使用時能使其 内部保持於減壓狀態之金屬製例如不鏽鋼製之減壓室2。於 減壓室2的内部，收納配置有一減壓脫泡槽3，該減壓脫泡 槽3係以其長軸朝水平方向的方式來收納配置。減壓脫泡槽 3其内部之氣壓係設定成小於大氣壓，並使已供至之熔融玻 12 201210965 璃G中之氣泡浮起及破裂。減壓脫泡槽3之一端側的下面透 過導入口 3a連接有垂直方向定位之上升管5,另一端側的下 面則透過導出口 3b連接有垂直方向定位之下降管6。上升管 5與下降管6係以透過形成於減壓室2的底部側之導入口 2a 或導出口 2b可個別與外部相通的方式配置。 本實施形態之減壓脫泡裝置100，具有一透過至少2條 連接管14A、15A與減壓脫泡槽3連接之氣體環境控制部 16。氣體環境控制部16其内部係中空之構造，且與減壓脫 泡槽3有相同程度的寬度，收納配置於減壓室2内之減壓脫 泡槽3的上方，於其中央部設有排氣口 π，該排氣口 17係用 以排出氣體環境控制部16内之氣體以減壓者。於連接管14A 之内部形成有連接通路14,而於連接管15A之内部則形成有 連接通路15。又，於減壓室2之内部側中之減壓脫泡槽3的 周圍、上升管5的周圍、下降管6的周圍、氣體環境控制部 16之底部16B周邊部與側壁部16D周邊部、連接管14A的周 圍 '及連接管15A的周圍各配設有隔熱材料7，且減壓脫泡 槽3與上升管5與下降管6與連接管14A、15A的外部側及氣 體環境控制部16之底部16B與側壁部16D的外部側係令為 已由隔熱材料7所包圍的構造。 於前述構造之減壓脫泡裝置1〇〇之中，減壓脫泡槽3、 上升管5及下降管6係令為由如電鑄耐火磚般之耐火碑製， 或是白金或白金合金製之中空管狀的形狀而構成的構造。 減廢脫泡槽3為耐火磚製之中空管時，減壓脫泡槽3係外形 為具有矩形戴面之耐火磚製之中空管，且其成為熔融玻璃 13 201210965 之流道的内部形狀以具有矩形截面為宜。減壓脫泡槽3為白 金製或白金合金製之中空管時，減壓脫泡槽3中之成為熔融 玻璃流道之内部戴面形狀則以具有圓形或橢圓形為宜。 上升官5及下降管6為耐火磚製之中空管時，上升管5及 下降管6係具有圓形戴面或包含矩形之多角形戴面之耐火 碑製之中空管’而成為溶融玻璃之流道的内部截面形狀以 具有圓形截面為宜。 上升管5及下降管6為白金製或白金合金製之中空管 時，上升管5及下降管6中之成為溶融玻璃之流道的内 面形狀以具有圓形或_形為宜。 另外，減壓脫泡裝置100為<達成2〇〇°頓/日以上的處理 月匕力或5GG»頓/日以上的處理能力般之大型裝置時， 之減壓脫泡槽3以由_耐火磚般之耐火碑所構成為宜、。 於上升管5的下端財延長#杆8，於下降管6的下端 則裝有延長用之外管9，外管8、9為白金或白金合金製。 另外，上升管5及下降管6為白金製或白金合金製之中 空管時，延長用之外管8、9不需另行設置，亦可為上升以 及下降管6以一體的方式延長至第記為外管8、9的部 份之構造。令為如前述之構造時’於下本巾請說明書中 之關於外管8、9之說明，以關於白金製或白金合金製之上 升管及下降管之記載來替代同樣玎適用。 上升管5係與減壓脫泡槽3之/側底部相通，將源自熔 融槽1之熔融玻璃G導入至減壓脫泡槽3。因此，安裝於上升 s 5之外f 8的下端（上游端)8a，係從藉由導管”與熔融槽1 14 201210965 連接之上游槽12的開口端嵌入，並浸潰於上游槽12内之熔 融玻璃G中。 又，下降管6係與減壓脫泡槽3之另一側底部相通，將 減壓脫泡後之熔融玻璃G導出至下個處理槽（圖示省略）。因 此，安裝於下降管6之外管9的下端（下游端）9a，係嵌入於下 游槽13的開口端，並浸潰於下游槽13内之溶融玻璃g中。 又，下游槽13之下游側連接有成型裝置2〇〇。於以上說明之 減壓脫泡裝置100中，上升管5係構成熔融玻璃之供給機 構，而下降管6則構成熔融玻璃之送出機構。 另外，於本說明書中，言及所謂「上游」及「下游」 時’係指流通於減壓脫泡裝置100中之熔融玻璃G之流動方 向中之上游及下游之意。 於本實施形態之減壓脫泡裝置100中之外管8、9為由白 金製或白金合金製之筒狀管所構成時，白金合金之具體例 可舉白金-金合金、白金-铑合金等為例。記載為白金或白 金合金時’亦可為使金屬氧化物分散於白金或白金合金而 成之強化白金。被分散之金屬氧化物可舉由八12〇3或心〇2或 Y2〇3所代表之長式周期表中之第3族 '第4族或者第13族之 金屬氧化物為例。 於本實施形態之減壓脫泡裝置100，於將減壓室2予以 減壓吸引之同時，並將氣體環境控制部16内及減壓脫泡槽3 内從排氣口 17進行排氣減壓，使減壓脫泡槽3内部之氣壓保 持在小於大氣壓之減壓狀態。於本實施形態之減壓脫泡裝 置100中，氣體環境控制部16，係成為氣流F的路徑，該氣 15 201210965 流F係流動於氣體環境控制部16之内部空間與減壓脫泡槽3 内之熔融玻璃G的上部空間（較熔融破璃收納部更上方之_ 間）與連接通路14、15者。另外，於第丨圖中，雖顯示著2 流F循環於熔融玻璃G之上部空間與氣體環境控制部丨6之内 部空間的情況，但氣流未必有循環之必要。舉例而a 广 流為由通過連接管14A而從排出口 17排出之氣流，與通過連 接管15而從排出口 17排出之氣流所構成亦可。氣流係有因 減壓脫泡槽之減壓操作而從排出口 17排出之氣流，| + | 決於前述之供給氣體之有無皆會產生。進而言之，於減壓 脫泡槽3及氣體環境控制部16之溫度梯度，也貢獻氣體流動 予源自溶融玻璃G之氣體成分。又’氣流f包含自熔融玻璃 G產生之氣體成分’且減壓脫泡裝置100設有後述之氣體供 給機構時，氣流F除了自熔融玻璃G產生之氣體成分，並包 含有經以氣體供給機構所供給之氣體成分。 在此，因氣體環境控制部16，係形成流動於減壓脫泡 槽3内之熔融玻璃G的上部空間與該氣體環境控制部16之内 部空間之氣流F的路徑’故連接通路14、15有與減壓脫、.包押 3於較減壓脫泡槽3内之熔融玻璃G的液面更上方相連接之 必要。因此，如第1圖所示，將氣體環境控制部16配置於減 壓脫泡槽3的上方係理想之形態。但是，只要連接通路14、 15與減壓脫泡槽3於較減壓脫泡槽3内之熔融玻璃G的液面 更上方相連接，則將氣體環境控制部16配置於減壓脫泡槽3 的側邊亦可。 又，為了形成不滯留地流動於減壓脫泡槽3内之熔融玻 201210965 璃⑽上部㈣與該氣體環境㈣部此 的路徑，4一至少需要2條。另外，二; 所示之減壓脫泡裝置刚，雖以2條連接管MA、15A與減壓 脫泡槽3及氣體環境控制部16連接著，但以3條以上之連接 管與減壓脫泡槽3及氣體環境控制部Μ連接亦可。 氣體環境控制部16、連接fl4A、⑽不是㈣破璃 G的導管’故其材質不受特別限舉例而言，可使用不錄 鋼白金白金合金等之金屬材料，陶究、氧化紹等之耐 火性·耐腐蝕性材料。 机入減壓脫泡槽3之氣流F的溫度低的話，因對減 壓脫泡槽3内之炫融玻璃〇有帶來不良影響的疑慮，故氣體 壞境控制部16及連接通路14、15宜具有加熱機構。但氣體 壞境控制部16及連接通路14、15未必全有設置加熱機構的 必要，至少，只要於氣流F流入減壓脫泡槽3側之連接管（第 1圖之情況為連接通路14之周圍）設置加熱機構的話，即可 解除溫度低之氣流F流入減壓脫泡槽3而對減壓脫泡槽3内 之熔融玻璃G帶來不良影響的疑慮。 本實施形態之減壓脫泡裝置1〇〇，為了形成氣流F，亦 可於減壓脫泡槽3内之熔融玻璃G的上部空間（較熔融玻璃 收納部上方的空間）内、連接通路14之内部、連接通路15之 内部、及氣體環境控制部16之内部中的至少任一處設置供 給氣體之氣體供給機構（圖示省略）。該氣體供給機構若能形 成流動於減壓脫泡槽3内之熔融玻璃G的上部空間與連接通 路14、15與氣體環境控制部16之氣流F的話，則其設置位置 17 201210965 或氣體供給方法不受特別限制。舉例而言，如從形成於減 壓脫泡槽3之上游側頂°卩之連接通路14的開口部，往減壓脫 泡槽3内之熔融玻璃G的上部空間般，藉由以使產生從上游 側往下游側流動之氣流Fd的方式來供給氣體，可形成如第1 圖所示之氣流F。又，藉由以使氣體環境控制部16之内部空 間中產生從下游側往上游側流動之氣流Fb的方式來供給氣 體，或是，藉由以使產生從氣體環境控制部16之内部空間 往連接通路14側流動之氣流Fc的方式來供給氣體，可形成 如第1圖所示之氣流F。又，如往減壓脫泡槽3内之熔融玻璃 G的上部空間般，藉由以使產生從上游側往下游側流動之氣 流Fe的方式來供給氣體’或是，藉由以使產生從減壓脫泡 槽3内之熔融玻璃G的上部空間往連接通路15側流動之氣流 Ff的方式來供給氣體，可形成如第1圖所示之氣流f。另外， 於本實施形態之減壓脫泡裝置100之中，只要能形成流動於 減壓脫泡槽3内之炫融玻璃G的上部空間與連接通路14、15 與氣體環境控制部16之氣流F，則氣體供給機構可只設一 個，亦可設有2個以上。201210965 VI. Description of the invention: n The invention relates to a vacuum degassing device for molten glass, a vacuum degassing method for molten glass, a manufacturing device for glass products, and a glass product. Production method. L ^c* ~mT ΦΙϊχ Ίί BACKGROUND OF THE INVENTION Heretofore, in order to improve the quality of a formed glass product, after melting the glass raw material in a molten bath, before the molten glass is formed into a forming device, it is removed in the molten glass. A vacuum degassing device is used for the purpose of generating bubbles. The vacuum degassing apparatus is configured to grow the gas/package contained in the molten glass in a relatively short period of time by passing the molten glass through a vacuum degassing tank which has been maintained at a predetermined degree of decompression inside. A device that floats the bubble on the surface of the molten glass by buoyancy of the bubble that has grown to a large extent, so that the bubble is broken on the surface of the molten glass, and the bubble is efficiently removed from the molten glass. When the vacuum degassing apparatus is used to increase the vacuum degassing effect of removing bubbles from the molten glass, theoretically, the pressure reduction of the gas environment above the molten glass is increased (the absolute pressure of the gas environment is reduced). Low) The effect of de-foaming can be reduced to reduce the bubbles in the molten glass fluid. However, in fact, the decompression degree of the gas environment above the molten glass reaches a certain stage of the activity, the bubble generation speed exceeds the bubble elimination speed of the bubble collapse, and the bubble layer is enlarged on the surface of the molten glass, Lead to decompression 201210965 defoaming ability reduced. The phenomenon as described above is referred to as hypertrophy of the bubble layer due to excessive decompression. As a result, the bubbles in the molten glass fluid increase. Therefore, the range of the degree of pressure reduction of the gas environment in which the vacuum degassing effect can be sufficiently exerted is narrow, and the effect of degassing under reduced pressure is also affected by external fluctuations such as fluctuations in atmospheric pressure. In order to solve the above problems, the inventors of the present invention have found that the gas component generated on the surface of the molten glass due to the collapse of the bubble is retained above the molten glass, and the effect of decompression under reduced pressure is lowered. When the gas component derived from the molten glass is retained above the molten glass, the partial pressure of the gas component derived from the molten glass becomes higher in the gas atmosphere above the molten glass, and the bubble which has floated on the surface of the molten glass becomes It is difficult to break, and the effect of defoaming under reduced pressure is reduced. Then, the inventors of the present invention have previously proposed that the gas is supplied to the space above the molten glass in the vacuum degassing tank to generate a gas flow (air flow), thereby eliminating the retention of the gas component derived from the molten glass and suppressing it. A technique for improving the effect of decompression under reduced pressure by the hypertrophy of the bubble layer due to excessive decompression (refer to Patent Document 1). CITATION LIST Patent Literature Patent Literature 1: International Publication No. 2009/107801, the contents of the present invention, the third aspect of the present invention, and the subject matter of the invention are the same as those of the patent document 1 which has been proposed in the prior art. The 201210965 gas environment control unit is connected to the upper portion of the bubble tank through at least two connecting pipes, and the gas flowing through the space above the molten glass in the vacuum degassing tank and the gas environment control unit through the splicing pipe is used to make a circulating air flow. It is derived from (4) the retention of gas components of glass. In the middle and the middle, the gas is supplied to the gas environment to control the money flow in the way of traversing the upper space of the shackle, and the connection between the pressure relief and the sump and the gas age control department is Gas Environment Control Department. By satisfying the relationship as described above, the gas supply and gas environment control unit generates a pressure S between the gas environment control unit and the vacuum degassing tank due to the Venturi effect (VentuHeffeet). The pressure difference causes the gas atmosphere control unit to generate a circulating air flow with the space above the molten glass in the vacuum degassing tank. In addition, the flow of the gas component derived from the molten glass in the upper space of the molten glass of the gas environment control unit and the vacuum degassing tank is temporarily reduced regardless of the flow rate. The presence or absence of the aforementioned supply gas will occur. Further, the temperature gradient of the vacuum degassing vessel and the gas environment control unit is also one of the factors contributing to the gas flow from the gas component derived from the molten glass. In the method of Patent Document 1, the position of the gas supply and the gas supply is premised, but the gas flow from the gas of the molten glass exists regardless of the presence or absence of the gas supply as described above. Therefore, it is expected that there is a method different from the disclosure of Patent Document 1, which is as far as possible free from the supply of gas and its position, and allows the gas environment control unit and the upper space of the molten glass of the vacuum degassing tank. The flow of the gas component derived from the molten glass is not retained. The present invention derived from the above background is intended to provide a vacuum degassing apparatus superior in depressurization effect on molten glass, and more specifically, to provide a vacuum degassing apparatus for molten glass in 201210965. The vacuum degassing apparatus for the molten glass is a method in which the pressure reduction defoaming effect is reduced due to the enlargement of the bubble layer due to excessive decompression. The present invention is directed to the provision of a reduced pressure defoaming method of molten glass using the above-described vacuum degassing apparatus, a manufacturing apparatus of a glass product, and a method of producing a glass product. Means for Solving the Problem As a result of the review by the inventors of the present invention, as described below, it is invented that the gas supply is not necessarily required, and the gas flow from the gas generated from the molten glass is rectified to reduce the stagnation of the gas flow. method. That is, the present invention provides a vacuum degassing apparatus for molten glass, the vacuum degassing apparatus of the molten glass is provided with an internal gas pressure set to be less than atmospheric pressure, and the bubbles in the molten glass supplied thereto are floated and broken. The vacuum degassing tank of the molten glass; the vacuum degassing apparatus of the molten glass is provided with: a gas environment control unit having a hollow structure, which passes through at least two connection passages and a relatively molten glass storage portion in the vacuum degassing tank Further, the space connection and the decompression exhaust port are formed in the gas environment control unit; and the decompression device for the molten glass is provided with a rectifying member around the opening of the inflow side connection passage outlet side. The inflow-side connecting passage allows the gas generated from the molten glass to flow from the decompression degassing tank to the gas environment control unit, and the rectifying member adjusts the gas flow of the gas. In the vacuum degassing apparatus of the present invention, the inflow side connecting passage system 201210965 is located further inside the outer peripheral portion of the gas environment control unit, and the upper space of the molten glass accommodating portion of the vacuum degassing tank and the gas environment are The control units are connected to each other. In the vacuum degassing apparatus of the present invention, it is preferable that the rectifying member is configured to include a rectifying wall portion that covers at least a half of an opening of the inflow-side connecting passage outlet side, and The opening portion is spaced apart from the outer peripheral portion of the gas environment control portion. In the vacuum degassing apparatus of the present invention, it is preferable that a guide surface is formed on an inner surface of the rectifying wall portion of the rectifying member, and the guiding surface is induced from the decompression defoaming tank via the inflow side. The gas flow of the gas flowing through the opening on the outlet side of the passage to the gas atmosphere control unit is conducted from the gas environment control unit to the side of the outlet side connecting passage of the vacuum degassing tank. In the vacuum degassing apparatus of the present invention, it is preferable that the rectifying wall portion of the flow regulating member is formed so as to surround the entire circumference of the opening portion on the outlet side of the inflow-side connecting passage. In the vacuum degassing apparatus of the present invention, it is preferable that the rectifying member is configured to include an introduction portion and a lead-out portion, and the introduction portion introduces a gas derived from an opening portion on the outlet side of the inflow-side connection passage into the rectifying member. The lead-out unit leads the gas that has been introduced into the rectifying member from the opening to the gas environment control unit. In the vacuum degassing apparatus of the present invention, the shape of the rectifying member is preferably tubular. In the vacuum degassing apparatus of the present invention, the indoor height of the gas environment control unit is Η and the height of the rectifying member is the maximum at the position where the opening is formed on the outlet side of the inflow-side connecting passage 7 201210965. When h is h, it is better to satisfy the relationship of l/4$h/H$3/4. In the vacuum degassing apparatus of the present invention, in the space above the molten glass storage portion in the vacuum degassing tank, any of the inside of the at least two connection passages and the inside of the gas environment control unit It is advisable to install a gas supply mechanism. In the vacuum degassing apparatus of the present invention, it is preferable to provide a pressure reducing chamber that surrounds the vacuum degassing tank and the gas environment control unit, and is internally sucked by vacuum suction. a vacuum degassing tank disposed in the decompression chamber for performing vacuum degassing of molten glass; a supply mechanism for supplying molten glass to the vacuum degassing tank; and a delivery mechanism Used to send the defoamed molten glass to the next step. Further, the present invention provides a vacuum degassing method using molten glass of the above-described vacuum degassing apparatus. In the vacuum degassing method of the molten glass of the present invention, the gas flow is adjusted by passing through the rectifying member provided around the opening of the inlet side of the inflow-side connecting passage by using the vacuum degassing apparatus described above, and It is preferable that the molten glass is subjected to a defoaming treatment; and the inflow-side connecting passage is configured to allow a gas generated from the molten glass to flow from the decompression degassing tank to the gas environment control unit. Further, the present invention provides a manufacturing apparatus for a glass product, the manufacturing apparatus of the glass product comprising: 8 201210965, the aforementioned vacuum degassing device; and a melting mechanism disposed on an upstream side of the vacuum degassing device, and The glass raw material is smelted to produce molten glass; the forming mechanism is disposed on the downstream side of the vacuum degassing device, and the glazing glass is formed; and the slow cooling mechanism is configured to slow the formed glass cool down. Furthermore, the present invention provides a method for producing a glass product, the method comprising the steps of: a defoaming treatment step of defoaming a glass by using the vacuum degassing apparatus described above; and a melting step, which is based on the foregoing On the upstream side of the vacuum degassing apparatus, the glass raw material is melted to produce molten glass; the forming step is performed on the downstream side of the vacuum degassing apparatus to form the molten glass; and the slow cooling step is performed after the forming The glass is gently cooled. The method for producing a glass product of the present invention preferably includes the following steps: a defoaming treatment step of adjusting the rectifying member provided around the opening portion on the outlet side of the inflow-side connecting passage by the above-described vacuum degassing device a gas flow of the gas, and the defoaming treatment is performed on the molten glass, and the inflow-side connecting passage is for the gas generated from the molten glass to flow from the decompression degassing tank to the gas environment control portion; the melting step Attached to the upstream side of the vacuum degassing apparatus to make the glass raw material smelt to produce (4) molten glass; the forming step is performed on the downstream side of the vacuum degassing apparatus, so that the melted glass is formed in 201210965; In the step, the formed glass is slowly cooled. According to the present invention, the vacuum degassing apparatus can be driven from the molten glass by flowing the upper space of the molten glass in the vacuum degassing tank to the gas environment control unit without depending on the presence or absence of the gas supply mechanism. The gas flow of the gas is rectified to eliminate the retention of the gas component derived from the molten glass, so that the reduction in the vacuum degassing effect can be suppressed. Further, the retention of the gas component derived from the molten glass is eliminated, and the bubble layer fertilizer assembly due to excessive decompression becomes difficult to occur, so that the degree of pressure reduction in the vacuum degassing tank can be increased. The effect of defoaming under reduced pressure is enhanced. Further, the vacuum degassing apparatus of the present invention is configured such that the rectifying member is disposed around the opening of the inflow-side connecting passage of the gas-environment control unit, and flows into the decompression degassing tank. The flow velocity of the gas flow in the upper space of the molten glass and the gas environment control unit is stabilized, and the retention of the gas component derived from the molten glass can be stabilized and eliminated, and the effect of decompression and defoaming can be suppressed. Upgrade. According to the vacuum degassing method of the present invention, a superior decompression defoaming effect can be achieved by using the above-described vacuum degassing apparatus. Further, in the case of a glass product manufacturing apparatus and a production method using the above-described vacuum degassing apparatus, it is possible to provide a high quality glass product. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a structural view showing a schematic longitudinal cross-sectional structure of an example of a vacuum degassing apparatus according to the present invention, and a state in which a forming apparatus is connected to the apparatus. 10 201210965 Fig. 2 is a view showing each embodiment of a flow regulating member applied to the vacuum degassing apparatus shown in Fig. 1; Fig. 2(a) is a partial cross-sectional perspective view showing the first embodiment; (b) shows a partial cross-sectional perspective view of the second embodiment; a second (c) view shows a partial cross-sectional perspective view of the third embodiment; and a second (d) shows a part of the fourth embodiment. Sectional perspective view. Fig. 3 is a view showing each embodiment of a flow regulating member applied to the vacuum degassing apparatus shown in Fig. 1; Fig. 3(a) is a partial sectional perspective view showing a fifth embodiment; The figure shows a partial cross-sectional perspective view of the sixth embodiment; the third (c) shows a partial cross-sectional perspective view of the seventh embodiment; and the third (d) shows a partial cross section of the eighth embodiment. perspective. Fig. 4 is a view showing each embodiment of a flow regulating member applied to the vacuum degassing apparatus shown in Fig. 1; Fig. 4(a) is a partial sectional perspective view showing the ninth embodiment; The drawings show a partial cross-sectional perspective view of the tenth embodiment; and Fig. 4(c) shows a partial cross-sectional perspective view of the eleventh embodiment. Fig. 5 is a flow chart showing an example of the steps of the method for producing a glass article relating to the present invention. Fig. 6 is a longitudinal sectional view showing the mode configuration of the vacuum degassing apparatus used for the simulation analysis of the examples. Fig. 7(a) is a view showing the results of airflow analysis of the examples, and Fig. 7(b) is a view showing the results of airflow analysis of the comparative examples. Fig. 8 is a graph showing the pressure in the upper space of the 201210965 smelting glass in the vacuum degassing tank of the examples and the comparative examples. The figure is a graph showing the tendency of the gas (upstream exhaust gas) discharged from the vacuum degassing tank to the gas environment (four) via the (9) mirror path to the decompression bubble from the self-decompression. The flow rate of the gas (downstream exhaust gas) discharged from the inflow-side connecting passage to the gas environment control unit. In the vacuum degassing apparatus of the prior art, the inflow side connecting passage is connected to the gas environment control unit, and when two chambers are formed outside the gas environment control unit, the passage and the opening portion are connected to the space and the inflow side. The nearby airflow mode displays the map. [Embodiment] The present invention will be described with respect to the embodiment of the vacuum degassing apparatus for molten glass according to the present invention. However, the present invention is not limited to the embodiment to be described below. Fig. 1 is a cross-sectional view showing a structural mode of an example of a vacuum degassing apparatus for molten glass according to the present invention. The vacuum degassing apparatus 100 shown in Fig. 1 is used for a process in which the molten glass G supplied from the melting tank 1 is degassed under reduced pressure and continuously supplied to the post-processing step. Forming device 200. The vacuum degassing apparatus 100 of the present embodiment has a decompression chamber 2 made of, for example, stainless steel, which can be kept in a reduced pressure state during use. Inside the decompression chamber 2, a vacuum degassing tank 3 is housed and disposed, and the decompression defoaming tank 3 is housed in such a manner that its long axis is oriented in the horizontal direction. The pressure inside the degassing vessel 3 is set to be less than atmospheric pressure, and the bubbles in the molten glass 12 are floated and broken. The lower surface of one end side of the vacuum degassing tank 3 is connected to the vertical direction of the riser pipe 5 through the introduction port 3a, and the lower end of the other end side is connected to the vertical direction down pipe 6 through the outlet port 3b. The riser pipe 5 and the down pipe 6 are disposed so as to be transparent to the outside through the introduction port 2a or the outlet port 2b formed on the bottom side of the decompression chamber 2. The vacuum degassing apparatus 100 of the present embodiment has a gas environment control unit 16 that is connected to the vacuum degassing tank 3 through at least two connecting pipes 14A and 15A. The gas environment control unit 16 has a hollow interior and has the same width as the vacuum degassing tank 3, and is housed above the decompression degassing tank 3 in the decompression chamber 2, and is provided at the center portion thereof. The exhaust port π is for exhausting the gas in the gas environment control unit 16 to decompress the gas. A connecting passage 14 is formed inside the connecting pipe 14A, and a connecting passage 15 is formed inside the connecting pipe 15A. Further, the periphery of the decompression degassing tank 3 in the inner side of the decompression chamber 2, the periphery of the riser 5, the periphery of the downcomer 6, the peripheral portion of the bottom portion 16B of the gas environment control portion 16, and the peripheral portion of the side wall portion 16D, A heat insulating material 7 is disposed around the circumference of the connecting pipe 14A and the connecting pipe 15A, and the vacuum degassing tank 3 and the riser 5 and the down pipe 6 and the outer sides of the connecting pipes 14A and 15A and the gas environment control unit are disposed. The bottom portion 16B of the 16 and the outer side of the side wall portion 16D are configured to be surrounded by the heat insulating material 7. In the vacuum degassing apparatus 1 of the above configuration, the vacuum degassing tank 3, the riser 5 and the downcomer 6 are made of a fireproof monument such as an electroformed refractory brick, or a platinum or platinum alloy. A structure formed by a hollow tubular shape. When the waste reduction defoaming tank 3 is a hollow tube made of refractory brick, the vacuum degassing tank 3 is a hollow tube made of refractory brick having a rectangular wearing surface, and it becomes the inside of the flow path of the molten glass 13 201210965. The shape is preferably a rectangular cross section. When the vacuum degassing tank 3 is a hollow tube made of platinum or a platinum alloy, the inner surface of the vacuum degassing tank 3 which has a molten glass flow path has a circular or elliptical shape. When the ascending official 5 and the descending pipe 6 are hollow pipes made of refractory bricks, the riser pipe 5 and the downcomer pipe 6 are melted or have a rounded surface or a hollow tube containing a rectangular polygonal surface. The inner cross-sectional shape of the glass flow path is preferably a circular cross section. When the riser 5 and the downcomer 6 are hollow tubes made of platinum or platinum alloy, the inner shape of the flow path of the riser 5 and the downcomer 6 to be the molten glass is preferably circular or y-shaped. In addition, the vacuum degassing apparatus 100 is a large-sized apparatus such as a processing apparatus that achieves a processing capacity of 2 〇〇 ton / day or more, or a processing capacity of 5 GG ton / day or more, and the vacuum degassing tank 3 is _ Refractory brick-like refractory monument is composed of suitable. At the lower end of the riser 5, the extension rod #8 is provided, and at the lower end of the downcomer 6, an outer tube 9 for extension is provided, and the outer tubes 8, 9 are made of platinum or platinum alloy. Further, when the riser 5 and the downcomer 6 are hollow tubes made of platinum or platinum alloy, the outer tubes 8 and 9 for extension need not be separately provided, and the ascending and descending tubes 6 may be extended to the first in an integrated manner. The structure of the portion of the outer tubes 8, 9 is referred to. The description of the outer tubes 8, 9 in the specification of the present invention is made in the same manner as in the case of the riser and the down tube made of platinum or platinum alloy. The riser 5 is connected to the bottom of the vacuum degassing tank 3, and the molten glass G from the melting tank 1 is introduced into the vacuum degassing tank 3. Therefore, the lower end (upstream end) 8a of f 8 installed outside the rising s 5 is embedded in the open end of the upstream groove 12 connected to the melting tank 1 14 201210965 by the conduit, and is immersed in the upstream tank 12 In the molten glass G, the downcomer 6 is connected to the bottom of the other side of the vacuum degassing tank 3, and the molten glass G which is defoamed under reduced pressure is led to the next processing tank (not shown). The lower end (downstream end) 9a of the tube 9 outside the downcomer 6 is embedded in the open end of the downstream tank 13 and is immersed in the molten glass g in the downstream tank 13. Further, the downstream side of the downstream tank 13 is connected In the vacuum degassing apparatus 100 described above, the riser 5 constitutes a supply mechanism of the molten glass, and the downcomer 6 constitutes a delivery mechanism of the molten glass. In addition, in the present specification, the so-called "Upstream" and "downstream" mean the upstream and downstream of the flow direction of the molten glass G flowing through the vacuum degassing apparatus 100. In the vacuum degassing apparatus 100 of the present embodiment, when the outer tubes 8 and 9 are formed of a cylindrical tube made of platinum or a platinum alloy, specific examples of the platinum alloy include platinum-gold alloy and platinum-iridium alloy. Wait for example. When it is described as platinum or a platinum alloy, it may be an enhanced platinum which is obtained by dispersing a metal oxide in platinum or a platinum alloy. The metal oxide to be dispersed may be exemplified by a metal oxide of Group 3 'Group 4 or Group 13 of the long-form periodic table represented by 八12〇3 or 〇2 or Y2〇3. In the vacuum degassing apparatus 100 of the present embodiment, the decompression chamber 2 is decompressed and sucked, and the inside of the gas atmosphere control unit 16 and the decompression degassing tank 3 are evacuated from the exhaust port 17. The pressure is maintained such that the pressure inside the degassing degassing tank 3 is maintained at a reduced pressure of less than atmospheric pressure. In the vacuum degassing apparatus 100 of the present embodiment, the gas environment control unit 16 is a path of the air flow F, and the gas 15 201210965 flows F to flow into the internal space of the gas environment control unit 16 and the decompression degassing tank 3 The upper space of the molten glass G (between the upper portion of the molten glass storage portion) and the connecting passages 14 and 15 are provided. Further, in the second drawing, the case where the two-flow F is circulated in the upper space of the molten glass G and the inner space of the gas-environment control unit 丨6 is shown, but the air flow does not necessarily have to be circulated. For example, a wide flow may be constituted by a flow of air discharged from the discharge port 17 through the connecting pipe 14A, and a flow of air discharged from the discharge port 17 through the connecting pipe 15. The air flow is a gas flow which is discharged from the discharge port 17 by the pressure reducing operation of the vacuum degassing tank, and | + | depending on the presence or absence of the aforementioned supply gas. Further, the temperature gradient of the degassing defoaming tank 3 and the gas environment control unit 16 also contributes to the gas flow to the gas component derived from the molten glass G. Further, when the gas flow f includes a gas component generated from the molten glass G and the vacuum degassing apparatus 100 is provided with a gas supply mechanism to be described later, the gas flow F includes a gas component generated from the molten glass G, and includes a gas supply mechanism. The gas component supplied. Here, since the gas environment control unit 16 forms a path of the airflow F flowing through the upper space of the molten glass G in the vacuum degassing tank 3 and the internal space of the gas environment control unit 16, the connection paths 14 and 15 are formed. It is necessary to be connected to the liquid surface of the molten glass G in the reduced pressure degassing tank 3, which is decompressed and decompressed. Therefore, as shown in Fig. 1, it is preferable that the gas environment control unit 16 is disposed above the decompression defoaming tank 3. However, if the connecting passages 14 and 15 and the vacuum degassing tank 3 are connected above the liquid surface of the molten glass G in the vacuum degassing tank 3, the gas environment control unit 16 is disposed in the vacuum degassing tank. The side of 3 can also be. Further, in order to form a path of the molten glass 201210965 glass (10) upper portion (4) and the gas environment (four) portion which does not flow in the decompression degassing tank 3, at least two are required. Further, in the vacuum degassing apparatus shown in the above, the two connecting pipes MA and 15A are connected to the vacuum degassing tank 3 and the gas environment control unit 16, but three or more connecting pipes and decompression are provided. The defoaming tank 3 and the gas environment control unit may be connected. The gas environment control unit 16 and the connection fl4A and (10) are not (four) the conduits for breaking the glass G. Therefore, the material thereof is not particularly limited. For example, a metal material such as a platinum-free platinum alloy may be used, and a fireproof such as ceramics or oxidized may be used. Sex and corrosion resistant materials. When the temperature of the gas stream F that has been introduced into the vacuum degassing tank 3 is low, the gas mist control unit 16 and the connection passage 14 are caused by the adverse effect on the glass frit in the vacuum degassing tank 3. 15 should have a heating mechanism. However, the gas environment control unit 16 and the connection passages 14 and 15 do not necessarily have to be provided with a heating mechanism. At least, the gas flow F flows into the connection pipe on the side of the pressure reduction degassing tank 3 (the case of the first embodiment is the connection passage 14). When the heating means is provided in the vicinity, the flow of the low-temperature airflow F into the vacuum degassing tank 3 is released, and the molten glass G in the vacuum degassing tank 3 is adversely affected. In the vacuum degassing apparatus 1 of the present embodiment, in order to form the gas flow F, the upper passage (the space above the molten glass storage portion) of the molten glass G in the vacuum degassing tank 3 may be connected to the passage 14 A gas supply mechanism (not shown) for supplying a gas is provided in at least one of the inside, the inside of the connection passage 15, and the inside of the gas environment control unit 16. When the gas supply means can form the upper space of the molten glass G flowing in the vacuum degassing tank 3 and the air flow F of the connection passages 14, 15 and the gas environment control portion 16, the installation position 17 201210965 or the gas supply method Not subject to special restrictions. For example, the opening portion of the connecting passage 14 formed on the upstream side of the vacuum degassing tank 3 is formed in the upper space of the molten glass G in the vacuum degassing tank 3 by The gas is supplied as a gas stream Fd flowing from the upstream side to the downstream side, and the gas flow F as shown in Fig. 1 can be formed. In addition, the gas is supplied so that the airflow Fb flowing from the downstream side to the upstream side is generated in the internal space of the gas environment control unit 16, or the internal space from the gas environment control unit 16 is generated. The gas is supplied so as to connect the gas stream Fc flowing on the side of the passage 14 to form the gas flow F as shown in Fig. 1 . Further, as in the upper space of the molten glass G in the vacuum degassing tank 3, the gas is supplied by the flow of Fe from the upstream side to the downstream side, or by The gas is supplied so that the upper space of the molten glass G in the vacuum degassing tank 3 flows toward the side of the connection passage 15 to form a gas flow f as shown in Fig. 1 . Further, in the vacuum degassing apparatus 100 of the present embodiment, it is possible to form the airflow of the upper space of the glazed glass G flowing in the vacuum degassing tank 3 and the air passages of the connection passages 14, 15 and the gas environment control unit 16. F, the gas supply mechanism may be provided only one or two or more.
於本實施形態之減壓脫泡裝置1〇〇之中，係透過將流動 於減壓脫泡槽3内之熔融玻璃G的上部空間（較熔融玻璃收 納部上方的空間）與連接通路14、15與氣體環境控制部16之 氣流F予以整流，來消除源自熔融玻璃G的氣體成分之滯 留。即，源自熔融玻璃G之氣體成分不滯留地藉由氣流F送 往氣體環境控制部16。而被送至氣體環境控制部16之源自 熔融玻璃G的氣體成分係從排氣口 17排放至外部。於氣流F 201210965 循環時，雖然已被送至氣體環境控制部16之内部空間的源 自炫融玻璃G之氣體成分的一部份，會透過氣流F而有被送 回到減壓脫泡槽3内之熔融玻璃G的上部空間中的情況’但 因循環於減壓脫泡槽3内之熔融玻璃G的氣體環境控制部16 與減壓脫泡槽3之氣流F存在的緣故，使源自熔融玻璃G之氣 體成分滯留的風險能被控制在最小限度。另外’於利用氣 體供給機構時，因源自熔融玻璃G之氣體成分會被由氣體供 給機構供給之氣體所稀釋，而使源自熔融玻璃G之氣體成分 在冷卻過程中附著於減壓脫泡裝置1〇〇内、或於由排氣口 17 排出後附著於系統内的情況受到防止。 源自熔融玻璃G之氣體成分滯留的話’因於熔融玻璃G 之上方的氣體環境(減壓脫泡槽3之上部空間）中’源自熔融 玻璃G之氣體成分的分壓會變高，故已浮於熔融玻璃G表面 上之氣泡會變得難以破裂而使減壓脫泡的效果降低。 本實施形態之減壓脫泡裝置100 ’因係藉由將流動於減 壓脫泡槽3内之炫融玻璃G的上部空間與氣體環境控制部16 之氣流F予以整流，使源自熔融玻璃G之氣體成分的滯留消 除’故減壓脫泡的效果優越。 又，源自炫融玻璃G之氣體成分滯留的話，會發生因過 度減壓所致之氣泡層的肥大化，而使減壓脫泡的效果大幅降 低，但於本實施形態之減壓脫泡裝置100，因源自熔融玻璃 G之氣體成分不滯留地藉由氣流1?輸送並從排氣口 17排出， 故即使將減壓脫泡槽3之減壓度調得比以往還高，亦變得較 能抑制因過度減壓所致之氣泡層肥大化。因此，能將減壓脫 19 201210965 泡槽3之減壓度調得比以往高（即，能將減壓脫泡槽3之絶對 壓調得比以往低），而使減壓脫泡的效果更加提高。 本發明中，於熔融玻璃G的上方形成氣流!^係為了消除 源自炫融玻璃G之氣體成分的滞留。因而，於利用氣體供給 機構時，其所供給之氣體係以不會對熔融玻璃或所製造之 玻璃製品及玻璃製造設備、特別是減壓脫泡裝置帶來不良 影響者為宜。因此，從氣體供給機構所供給之氣體的成分 中，以不含腐蚀性、爆炸性之氣體為宜。 滿足上述之氣體可舉大氣、乾燥空氣、叫或八1>般之惰 性氣體、C〇2等之低分子氣體為例。該等氣體係亦可單獨使 用，而使用2種以上的混合氣體亦可。 由氣體供給機構供給之氣體，使用了水蒸氣濃度 60mol。/。以下德分子氣料，因將源自炼融玻璃G之氣體 成分的滯留消除的效果，加上可期待有使減壓脫泡槽3内之 溶融玻璃G上方之氣體環境的水錢濃度減低的效果而理 想。 減壓脫泡槽3内之炫融玻璃G上方之氣體環境的水蒸氣 濃度係以減至60mol%以下為宜。透過令該氣體環境的水蒸 氣濃度為60mol%以下，可防止減壓脫泡槽3内之熔融玻璃 表面的氣泡層肥大化而產生爆沸’能使減壓脫泡的效果更 加提升。 減壓脫泡槽3為白金製或白金合金製時，作為由氣體供 給機構供給之氣體來使用的低分子氣體，係以其氧氣濃度 較空氣中之氧氣濃度低的氣體為宜。作為由氣體供給機構 20 201210965 供給之氣體來使用的低分子氣體’藉由使用氧氣濃度較空 氣中之氧氣濃度低的氣體，於減壓脫泡槽3之材質使用白金 及白金合金時，能抑制其白金的氧化，延長減壓脫泡槽3的 壽命’進而於«製品中，因轉制該白金所致之缺陷的 產生而佳。 氣流F之橫向平均流速，只要是能消除源自熔融玻璃〇 之氣體成分的滯留的話則不受特別限制，但以令其為 0.0005〜1.50m/s為宜’令其為0.0〇1〜〇2m/s較佳。藉由將 氣流F之流速設定為前述範圍，能消除源自熔融玻璃〇之氣 體成分的滯留防止氣泡層肥大化，並能使減壓脫泡的效果 提升。 於本實施形態之減壓脫泡裝置100之中，於氣體環境控 制部16内之連接通路15之出口側的開口部18周圍設有整流 構件20，該連接通路15係位於氣流F從減壓脫泡槽3往氣體 環境控制部16流入之側，而前述氣流f中包含業已自熔融玻 璃G產生之氣體成分。該整流構件2〇，於從減壓脫泡槽3經 由連接通路15往氣體環境控制部16流動之氣流F之中，又特 別係以為了調整從開口部18往氣體環境控制部16之内部側 流入之區域中的氣流Fa的流動所設置。 以下，將就整流構件20予以詳細說明。另外’於以下 之說明中，有將氣流F往氣體環境控制部16流入側的連接通 路b以「流入側連接通路15」稱之，將氣流F從氣體環境控 制部16流出之連接通路14以「流出側連接通路14」稱之。 又，有將形成流入側連接通路15之連接管15A以「流入側連 21 201210965In the vacuum degassing apparatus 1 of the present embodiment, the upper space (the space above the molten glass storage portion) and the connecting passage 14 that pass through the molten glass G flowing in the vacuum degassing tank 3 are transmitted. The airflow F of the gas environment control unit 16 is rectified to eliminate the retention of the gas component derived from the molten glass G. In other words, the gas component derived from the molten glass G is sent to the gas environment control unit 16 by the air flow F without being retained. The gas component derived from the molten glass G sent to the gas environment control unit 16 is discharged from the exhaust port 17 to the outside. During the circulation of the airflow F 201210965, a part of the gas component derived from the glazing glass G that has been sent to the internal space of the gas environment control unit 16 is sent back to the vacuum degassing tank through the air flow F. In the case of the upper space of the molten glass G in the third part, the source of the molten gas G in the decompression degassing tank 3 and the gas flow F of the decompression degassing tank 3 are caused by the flow. The risk of retention of gas components from the molten glass G can be minimized. In addition, when the gas supply mechanism is used, the gas component derived from the molten glass G is diluted by the gas supplied from the gas supply mechanism, and the gas component derived from the molten glass G is attached to the vacuum degassing during cooling. The inside of the device 1 or in the system after being discharged from the exhaust port 17 is prevented. When the gas component derived from the molten glass G is retained, the partial pressure of the gas component derived from the molten glass G in the gas atmosphere above the molten glass G (the upper space of the vacuum degassing vessel 3) becomes high. The bubbles that have floated on the surface of the molten glass G become difficult to be broken, and the effect of defoaming under reduced pressure is lowered. The vacuum degassing apparatus 100' of the present embodiment is rectified by the airflow F of the upper space of the glazing glass G flowing in the vacuum degassing tank 3 and the gas environment control unit 16, and is derived from the molten glass. The retention of the gas component of G is eliminated. Therefore, the effect of decompression under reduced pressure is excellent. Further, when the gas component derived from the glazing glass G is retained, the bubble layer due to excessive decompression is enlarged, and the effect of degassing under reduced pressure is greatly reduced. However, the decompression under reduced pressure in the present embodiment is obtained. In the apparatus 100, since the gas component derived from the molten glass G is transported by the airflow 1 and is discharged from the exhaust port 17, the decompression degree of the vacuum degassing tank 3 is adjusted higher than in the past. It becomes more resistant to the enlargement of the bubble layer due to excessive decompression. Therefore, the decompression degree of the 201210965 bubble tank 3 can be adjusted higher than the conventional one (that is, the absolute pressure of the vacuum degassing tank 3 can be adjusted lower than before), and the effect of decompression under reduced pressure can be achieved. More improved. In the present invention, an air flow is formed above the molten glass G in order to eliminate the retention of the gas component derived from the molten glass G. Therefore, when the gas supply mechanism is used, it is preferable that the gas system supplied does not adversely affect the molten glass, the manufactured glass product, and the glass manufacturing equipment, particularly the vacuum degassing apparatus. Therefore, it is preferable that the gas supplied from the gas supply means does not contain a corrosive or explosive gas. For example, the above-mentioned gas can be exemplified by a low molecular gas such as an atmosphere, a dry air, or an inert gas such as VIII and C 〇 2 . These gas systems may be used singly or in combination of two or more kinds. The gas supplied from the gas supply mechanism used a water vapor concentration of 60 mol. /. In the following German molecular materials, the effect of eliminating the retention of the gas component derived from the molten glass G is reduced, and the concentration of water in the gaseous environment above the molten glass G in the vacuum degassing tank 3 is expected to be reduced. The effect is ideal. The water vapor concentration in the gas atmosphere above the glazed glass G in the vacuum degassing tank 3 is preferably reduced to 60 mol% or less. When the water vapor concentration in the gas atmosphere is 60 mol% or less, it is possible to prevent the bubble layer on the surface of the molten glass in the vacuum degassing tank 3 from being enlarged and causing a bump. The effect of defoaming under reduced pressure is further enhanced. When the vacuum degassing tank 3 is made of platinum or platinum alloy, the low molecular gas used as the gas supplied from the gas supply means is preferably a gas having a lower oxygen concentration than oxygen in the air. The low molecular gas used as the gas supplied from the gas supply means 20 201210965 can be suppressed by using a gas having a lower oxygen concentration than the oxygen in the air, and when the material of the vacuum degassing tank 3 is made of platinum and platinum alloy. The oxidation of platinum promotes the life of the vacuum degassing tank 3, which is better in the production of defects caused by the conversion of the platinum. The lateral average flow velocity of the gas stream F is not particularly limited as long as it can eliminate the retention of the gas component derived from the molten glass crucible, but it is preferably made 0.0001 to 1.50 m/s, so that it is 0.0〇1 to 〇. 2 m / s is preferred. By setting the flow rate of the gas stream F to the above range, it is possible to eliminate the accumulation of gas components derived from the molten glass crucible and prevent the bubble layer from being enlarged, and the effect of degassing under reduced pressure can be enhanced. In the vacuum degassing apparatus 100 of the present embodiment, a rectifying member 20 is provided around the opening 18 on the outlet side of the connection passage 15 in the gas atmosphere control unit 16, and the connecting passage 15 is located in the airflow F from the decompression The defoaming tank 3 is directed to the side where the gas environment control unit 16 flows, and the gas stream f contains a gas component which has been generated from the molten glass G. The flow regulating member 2 is disposed in the airflow F flowing from the vacuum degassing tank 3 through the connecting passage 15 to the gas environment control unit 16, and in particular, for adjusting the inner side of the gas environment control unit 16 from the opening portion 18 The flow of the airflow Fa in the inflowing area is set. Hereinafter, the flow regulating member 20 will be described in detail. In the following description, the connection passage b that flows the airflow F to the inflow side of the gas environment control unit 16 is referred to as the "inflow side connection passage 15", and the connection passage 14 through which the airflow F flows out from the gas environment control portion 16 is The "outflow side connecting passage 14" is called. Further, there is a connecting pipe 15A that will form the inflow side connecting passage 15 to "inflow side connection 21 201210965
Μ ’將形成流出側連接通路l4 「流出側管14A」稱之。 SMAU 整流構件20係設置於開口部18的周圍，該開口部⑻系 連接管1SA連通於氣體環境控制部以的部份。在此，於本實 施形態之減壓脫泡裝置之中，如第lffi]所示，流入側連 接管1SA細使為較氣料肋㈣16之外周部側壁也更 内側的方式連接於氣體環境㈣部16。流人側連接管15八 雖亦可能設置於較靠近外周部側壁16a的位置，但使氣體環 境控制部16之外周部側壁⑹與流人側連接管i5A接近: 話，則因設置於流入側連接管丨5 A與氣體環境控制部i 6周圍 之隔熱材料7的熱膨脹率、與形成流人側連接们认之材料 的熱膨脹率、以及與形成氣體環境控制部16之材料的熱膨 脹率相異，故會有於減壓脫泡時的高溫中保持減壓脫泡裳 置100的構造變得困難的情形。因此，如第1圖所示，流入 側連接管15A設置於較氣體環境控制部16之外周部側壁 之更内側處，且宜形成有氣體環境控制部16之外周部的空 間（以外周部側壁l6a與外周部頂部16b與外周部底部l6c所 包圍的空間）19(以下，有時會將「外周部的空間19」略稱為 「空間19」）。又，源自熔融玻璃G之氣體成分成為凝集體 附著於氣體環境控制部16之外周部側壁〗6a，當其掉落時， 若流入侧連接管15A設置於較氣體環境控制部16之外周部 側壁16a更内側處的話，即形成有空間19的話，則凝集體會 掉落在外周部底部16c，從能防止往減壓脫泡槽3内掉落的 點來看亦佳。 22 201210965 依據同樣的理由’流出側連接管14A亦係以使於較相對 於氣體環境控制部16之外周部側壁16a為他側的外周部側 壁更内側的方式連接於氣體環境控制部16為宜。 如前所述般’流入側連接管15A連接於氣體環境控制部 16，且形成有氣體環境控制部16之外周部的空間（以外周部 側壁16a與外周部頂部16b與外周部底部16c所包圍的空 間）’雖因依據前述理由而佳，但如後述實施例所示般，本 發明者等於將空間19與流入側連接通路丨5與開口部18附近 之氣流的動態經進行模擬分析後已清楚明白，因形成有空 間19，使於開口部18上升的氣流F(上升氣流）會受到在空間 19產生的漩渦氣流所阻礙，使氣流F的流動變得不安定。如 前所述，氣流F之流動變得不安定的話，氣流F之控制會變 得困難，減壓脫泡槽3内之熔融玻璃G的上部空間中，會產 生源自熔融玻璃G的氣體成分滯留的地方、與滯留被消除的 地方，使減壓脫泡之效果出現不均，有所製造之玻璃的品 質產生不均之疑慮。Μ ' will be referred to as the outflow side connecting passage 14 "outflow side tube 14A". The SMAU rectifying member 20 is provided around the opening portion 18, and the opening portion (8) is a portion where the connecting pipe 1SA communicates with the gas environment control portion. Here, in the vacuum degassing apparatus of the present embodiment, as shown in the lffi], the inflow-side connecting pipe 1SA is connected to the gas atmosphere so that the outer peripheral side wall of the gas rib (four) 16 is further inside. Part 16. The flow side connecting pipe 15 may be disposed closer to the outer peripheral side wall 16a, but the outer peripheral side wall (6) of the gas environment control unit 16 is close to the flow side connecting pipe i5A: if it is disposed on the inflow side The coefficient of thermal expansion of the heat insulating material 7 around the connecting tube 5A and the gas environment control unit i6, the coefficient of thermal expansion of the material which is considered to be connected to the flow side, and the coefficient of thermal expansion of the material forming the gas environment control unit 16 When it is different, it is difficult to maintain the structure of the decompression and defoaming of 100 in the high temperature at the time of decompression and defoaming. Therefore, as shown in Fig. 1, the inflow-side connecting pipe 15A is provided at the inner side of the outer peripheral side wall of the gas-environment control unit 16, and the outer peripheral portion of the gas-environment control unit 16 is preferably formed (the outer peripheral side wall) The space surrounded by the outer peripheral portion top portion 16b and the outer peripheral portion bottom portion 16c) 19 (hereinafter, the "outer peripheral portion space 19" may be referred to as "space 19"). In addition, the gas component derived from the molten glass G adheres to the outer peripheral side wall 6a of the gas environment control unit 16, and when it falls, the inflow side connecting pipe 15A is provided in the outer periphery of the gas environment control unit 16. When the side wall 16a is further inside, that is, when the space 19 is formed, the aggregate falls to the outer peripheral portion bottom portion 16c, and it is also preferable from the point of preventing the falling into the decompression defoaming tank 3. 22 201210965 For the same reason, the outflow side connecting pipe 14A is preferably connected to the gas environment control unit 16 so as to be further inside than the outer peripheral side wall of the outer peripheral side wall 16a of the gas environment control unit 16 on the other side. . As described above, the inflow-side connecting pipe 15A is connected to the gas-environment control unit 16 and has a space in which the outer peripheral portion of the gas-environment control unit 16 is formed (the outer peripheral side wall 16a and the outer peripheral portion top 16b and the outer peripheral portion bottom portion 16c are surrounded by each other). Although it is preferable for the above reasons, the inventors of the present invention have performed the simulation analysis of the dynamics of the airflow in the vicinity of the space 19 and the inflow-side connecting passage 丨5 and the opening 18, as shown in the later-described embodiment. It is clear that the airflow F (upward airflow) that rises in the opening portion 18 is blocked by the vortex airflow generated in the space 19 due to the formation of the space 19, and the flow of the airflow F becomes unstable. As described above, when the flow of the airflow F becomes unstable, the control of the airflow F becomes difficult, and the gas component derived from the molten glass G is generated in the upper space of the molten glass G in the vacuum degassing tank 3. The place where it stays and the place where the retention is eliminated, the effect of defoaming under reduced pressure is uneven, and there is a concern that the quality of the manufactured glass is uneven.
第10圖係於習知之減壓脫泡裝置中，流入側連接管15A 連接於氣體環境控制部16，且形成有氣體環境控制部16之 外周部的空間（以外周部側壁16a與外周部頂部16b與外周 部底部16c所包圍的空間）19時，將空間19與流入側連接管 15 A與開口部18附近之氣流的動態模式地顯示的圖。於減壓 脫泡裝置中’氣體環境控制部16的溫度係較熔融玻璃G流通 之減壓脫泡槽3的溫度低，又’於氣體環境控制部16之頂部 16A，與氣體環境控制部丨6之底部16B，頂部16A較底部16B 23 201210965 之溫度低’其溫度差係例如loot左右。因此，於氣體環境 控制部16之外周部頂部16b與氣體環境控制部16之外周部 底部16c，該外周部頂部16b的溫度係比該外周部底部l6c的 溫度低。於如此溫度環境之氣體環境控制部16中，為從減 壓脫泡槽3於流入側連接通路15上升之氣流ρ的上升氣流 S1，經由開口部18流入氣體環境控制部16之後，其一部份 流往氣體環境控制部16之外周部的空間19，於氣體環境控 制部16内相對上溫度低的外周部頂部16b冷卻，而往外周部 底部16c下降。其結果，如第1〇圖所示之漩渦氣流S2便於氣 體環境控制部16之外周部的空間19中產生。 於氣體環境控制部16之外周部的空間19產生漩滿氣流 S2的話’則在形成於空間19内側之流入側連接通路15上升 之上升氣流S1，會於開口部18附近與漩渦氣流S2相遇，上 升氣流S1的流動會被漩渦氣流S2所阻礙。如此，因上升氣 流S1的流動會被漩渦氣流S2阻礙，使流動於減壓脫泡槽3 内之熔融玻璃G的上部空間與氣體環境控制部16之氣流f變 得不安定。 第7(b)圖係顯示於後述之實施例中，流入側連接通路15 連接於氣體環境控制部16，且形成有氣體環境控制部16之 外周部的空間19時，將空間19與流入側連接通路15與開口 部18附近之氣流的動態經模擬分析後之結果的圖。如第7(b) 圖所示，來自外周部之空間19的漩渦氣流S2,阻礙著從流 入側連接通路15經由開口部18往氣體環境控制部16流入之 氣流（上升氣流)S1的流動。因璇渦氣流S2之強度會因上升 24 201210965 氣流s 1的強度或周圍之溫度環境等而變化，如此般之狀況 下上升氣流S1的流動會變得不安定，而其成為原因使氣流F 也變得不安定。又，如所述般於開口部18附近往氣體環境控 制部16的流入被阻礙了的上升氣流S1的一部份，推測會往減 壓脫泡槽3内之熔融玻璃G的下游側之上部空間逆流。上升 氣流S1產生逆流的話，氣流ρ的循環狀態會變得不安定。 為了抑制因漩渦氣流S2對上升氣流si的阻礙，並使來 自開口部18之氣流Fa安定化，本實施形態之減壓脫泡裝置 100係令為於氣體環境控制部16内之流入側連接通路15出 口側的開口部18周圍設置整流構件20的構造，該流入側連 接通路15係位於氣流f從減壓脫泡槽3往氣體環境控制部16 流入之側’而前述氣流F中包含業已自熔融玻璃G產生之氣 體成分。 整流構件20，係為了抑制如第1〇圖所示之漩渦氣流S2 妨礙上升氣流S1的流動而設置者，且設有區隔開口部18與 氣體環境控制部16之外周部的空間19的整流壁部21。 第2(a)圖係於本實施形態之減壓脫泡裝置1〇〇中設有整 流構件之一實施形態，與將減壓脫泡裝置1〇〇之整流構件附 近部份加以擴大顯示之部份截面透視圖。示於第2(a)圖之整 流構件20 ’其區隔氣體環境控制部16之外周部的空間19與 開口部18的整流壁部21係以包覆開口部18全周而設置，且 其係呈管狀（即，筒狀）。於管狀之整流構件2〇的底部，形成 有導入部23，該導入部23係將源自流入側整流構件20之開 口部18的氣體導入該整流構件20内部者，於整流構件20的 25 201210965 上面，形成有導出部24，該導出部24係將已由開口部18導 入整流構件20内部之氣體往氣體環境控制部16導出者。 於示於第2(a)圖之整流構件20中，區隔氣體環境控制部 16的外周部之空間19與開口部18的整流壁部21係抑制產生 於空間19之漩渦氣流S2往開口部18流入。因此，可防止流 動於流入側連接通路15之上升氣流S1，於開口部18附近與 a亥奴渦氣流S2相遇，使上升氣流S 1的流動被阻礙的情況。 第7(a)圖係顯示於後述之實施例中，於流入側連接通路 15出口側的開口部18周圍設置第2(a)圖所示形狀之整流構 件20時，將氣體環境控制部16之外周部空間19與流入側連 接通路15與開口部18附近中之氣流的動態經模擬分析後之 結果的圖。如第7(a)圖所示，透過於流入側連接通路15出口 側的開口部18周圍設置整流構件2〇，從流入侧連接通路15經 由開口部18往氣體環境控制部16流入之氣流F(上升氣流 S1) ’可不被來自空間19的旋渦氣流S2所阻礙，而使氣流F的 流速安定化。 由此結果可清楚明白，本實施形態之減壓脫泡裝置丨〇〇 係透過令其為於氣體環境控制部16之流入側連接通路15出 口側的開口部18周圍設有整流構件20的構造，使流動於減 壓脫泡槽3内之熔融玻璃G之上部空間與氣體環境控制部16 的氣流F之流速安定化，而能消除源自熔融玻璃g之氣體成 分的滯留’抑制減壓脫泡性能的參差，使減壓脫泡的效果 提升。 整流構件20之導入部23的開口尺寸、導出部24的開口 26 201210965 尺寸及流構件20的内部空間（整流構件20的内徑）’因係要能 不妨礙氣流F的流動，而使氣流F的流動安定，故以設定為 較開口部18的尺寸大為宜。 整流構件20之整流壁部21的内面22，係以作為誘導氣 流F之氣流（即，為氣流F的流道）的導引面為機能。導引面 係亦可如第2 (a)圖所示之整流構件2 0，於開口部18之上方形 成有導出部24，將氣流F由開口部18誘導至鉛直方向上方般 來形成，亦可如後述第4(a)〜4(c)圖所示之實施形態，導出 部2 4以朝向氣體環境控制部16之流出側連接通路14側的方 式般形成，以氣流F於氣體環境控制部16内從流入側連接通 路15側往流出側連接通路14側流動的方式來誘導。為整流 構件20之整流壁部21的内面22之導引面，若設定成不將氣 流F往空間19側誘導的話，則將形成如第1圖所示之循環於 減壓脫泡槽3内之熔融玻璃G的上部空間與氣體環境控制部 16之氣流F。 整流構件20係以耐熱性優之材料所形成，例如可舉陶 瓷系之非金屬無機材料、緻密質耐火物等為例。緻密質耐 火物之具體例子，可舉氧化鋁系電鑄耐火物（alumina electrocast refractory)、氧化鍅系電鑄耐火物（zirc〇nia electrocast refractory)、氧化鋁-氧化鍅-氧化石夕系電鎮耐火 物（alumina-zirconia-silica electrocast refractory)等之電鎮而才 火物’以及緻密質氧化鋁系耐火物、緻密質氧化錯-氧化石夕 系耐火物及緻密質氧化銘-氧化錘·氧化矽系耐火物等之緻 密質燒成财火物為例。 27 201210965 整流構件2 0之高度的最大值h，於令流入側連接通路15 之形成有開口部18之位置中之氣體環境控制部16的室内高 度為Η時，設定成滿足l/4Sh/HS3/4之關係因可不阻礙上 升氣流的流動而佳，而設定成滿足l/3Sh/HS2/3之關係因 更不會阻礙上升氣流的流動之故更為理想。 整流構件2 0之尺寸係可按照使用的減壓脫泡裝置適當 地做選擇。本發明之減壓脫泡裝置之各構成要素的尺寸可 按照需要適當地選擇。以下將顯示各構成要素的尺寸的一 例。另外，以下所示之整流構件20之尺寸係亦能適用於後 述之第2〜第11實施形態的整流構件20B〜20L。 [減壓脫泡槽3] 本發明之減壓脫泡裝置之減壓脫泡槽的尺寸，係不依 減壓脫泡槽是白金製或白金合金製、或是否為緻密質耐火 物製來選擇，而可按照使用之減壓脫泡裝置或減壓脫泡槽 的形狀適當地做選擇。如第1圖所示之減壓脫泡槽3為圓筒 狀時，其尺寸之一例如下。 .水平方向之長度：1〜20m •内徑_· 0.2〜3m(截面圓形） 減壓脫泡槽3為白金製或白金合金製時，厚度以4mm以 下為宜，較佳係0.5〜1.2mm。 減壓脫泡槽3不限定要為截面圓形之圓筒狀者，其截面 形狀亦可為橢圓形或半圓形之約略圓形者，亦可為截面為 矩形之筒狀者。 [上升管5及下降管6] 28 201210965 上升管5及下降管6，係不依是白金製或白金合金製、 或是否為緻密質耐火性來選擇，而可按照使用之減壓脫泡 裝置適當地做選擇。例如，為第1圖所示之減壓脫泡裝置1〇〇 時，上升管5及下降管6之尺寸的一例如下。 •内徑：0.05〜0.8m，較佳係ο ι〜〇.6m .長度：0.2〜6m，較佳係0.4〜4m 上升管5及下降管6為白金製或白金合金製時，厚度以 0.4〜5mm為宜，較佳係0.8〜4mm。 [氣體環境控制部16] 氣體環境控制部16之尺寸，係可按照使用之減壓脫泡 裝置、特別是減壓脫泡槽3來適當地做選擇，其一例如下。 •内徑：0_1〜3m，較佳係〇.1〜2m •長度：0.8〜22m，較佳係1〜20m •開口部18形成位置之室内高度Η:0.1〜3m，較佳係〇1 〜2m 氣體％境控制部16之厚度，雖依據構成材料亦會有所 不同’但為不錄鋼製時，以0.5〜2mm為宜，較佳係〇.5〜 1.5mm。 [流出側連接管14A及流入側連接管15A] 流出側連接管14A、流入側連接管15A之尺寸係可按照 使用之減壓脫泡裝置、特別是減壓脫泡槽3來適當地做選 擇，其一例如下。 .内徑：0.05〜0.5m，較佳係0.05〜0.3m •長度.0.1〜lm，較佳係0.1〜〇.8m 29 201210965 流出側連接管14A及流入側連接管15A之厚度，雖依據 構成材料亦會有所不同，但為不鏽鋼製時，以〇 5〜2mm為 宜，較佳係0.5〜1.5mm。 開口部18(流入側連接管15A之内周面）與氣體環境控 制部16之外周部側壁16a内面之距離Dl，雖因流入側連接管 15A之厚度會有所不同’但以〇.〇5〜2m為宜，較佳係〇 〇5〜 lm 0 [整流構件20] 雖然整流構件2 0之尺寸係會因氣體環境控制部丨6之尺 寸、流入側連接管15A之内徑或設置位置（即，開口部18之 尺寸或形成位置）等而不同’但整流構件2〇之高度h如前述 般’與於氣體環境控制部16之開口部18之形成位置之室内 高度Η的關係以滿足l/4$h/H$3/4為佳，滿足 l/3Sh/H$2/3更佳。具體而言，例如’整流構件2〇之高度h 係以0.03〜2m為宜，較佳係0.05〜lm。 整流構件20之厚度’雖依據構成材料亦會有所不同， 但以1〜50mm為宜，較佳係2〜30mm。 雖然整流構件20之導入部23、導出部24及其内部空間 之尺寸係會依據流入側連接管15A及開口部18之尺寸等而 不同，但以使不妨礙來自開口部18之氣流f之流動的方式， 將整流構件20之導入部23、導出部24及其内部空間之尺寸 設定成較開口部18之尺寸大為宜。作為一例，可舉如為第 2(a)圖所示之筒狀（管狀）的整流構件20時，以將整流構件20 之内徑設定為較開口部18之尺寸大〇〜5〇%為宜，具體而 30 201210965 言，以將整流構件20之内徑設定為較開口部18之尺寸大〇〜 0_5m為宜’設定為大0〜〇·2ηι更佳。 設置於本發明之減壓脫泡裝置之整流構件，係不受前 述之第2(a)圖所示之圓筒狀之整流構件2〇所限定。以下，將 依據第2(a)圖〜第4(c)圖來說明本發明之減壓脫泡裝置中 之整流構件之其他形態。另外，於第2(a)圖〜第4(c)圖所示 之整流構件中，其材質或理想的形狀、設置位置等，係與 於第2(a)圖所示之整流構件2〇所述者相同。 從第2(b)〜2(d)圖係顯示適用於本發明之減壓脫泡裝 置之整流構件的其他實施形態者，第2(b)圖係顯示第2實施 形態之整流構件的部份截面透視圖，第2(c)圖係顯示第3實 施形態之整流構件的部份截面透視圖，第2(d)圖係顯示第4 實施形態之整流構件的部份截面透視圖。 示於第2(b)圖之整流構件2〇b，係横截面形狀為四角形 之管狀’且具有四角形之導入部23B與導出部24B者。如第 2(b)圖所示’藉由將前述構造之整流構件2〇B以包圍開口部 18的周圍來設置’而開口部18則藉整流壁部21B與空間19 作區隔’可抑制來自空間19之漩渦氣流阻礙從流入側連接 通路15經由開口部18流動之上升氣流。因此，與前述之已 设有整流構件20的情況相同，藉著將示於第2(b)圖之整流構 件20B適用於本發明之減壓脫泡裝置，能使氣流的流動安定 化’能安定並消除源自熔融玻璃G之氣體成分的滯留，且能 抑制減壓脫泡性能之參差，使減壓脫泡效果提升。 示於第2(c)圖之整流構件2〇c，係横截面形狀為三角形 31 201210965 之管狀’且具有三角形之導入部23C與導出部24C者。如第 2(c)圖所示’藉由將前述構造之整流構件2〇c以包圍開口部 18的周圍來設置，而開口部18則藉整流壁部21 c來與空間19 作區隔，可抑制來自空間19之漩渦氣流阻礙從流入側連接 通路15經由開口部18流動之上升氣流。 示於第2 (d)圖之整流構件2 〇 d ’係截面形狀為淚滴形之 管狀，且具有淚滴形之導入部23D與導出部24D者。如第2(d) 圖所示，藉由將前述構造之整流構件20D以包圍開口部18 的周圍來設置，而開口部18則藉彎曲形狀之整流壁部21D 來與空間19作區隔，可抑制來自空間19之漩渦氣流阻礙從 流入側連接通路15經由開口部18流動之上升氣流。 第3(a)〜3(d)圖係顯示適用於本發明之減壓脫泡裝置 之整流構件的其他實施形態者，第3(a)圖係顯示第5實施形 態之整流構件的部份截面透視圖，第3(b)圖係顯示第6實施 形態之整流構件的部份截面透視圖，第3(c)圖係顯示第7實 她形態之整流構件的部份截面透視圖，第3(d)圖係顯示第8 實她形態之整流構件的部份截面透視圖。 於本發明之減壓脫泡裝置中之整流構件，係將氣體環 i兄控制部16之外周部之空間19與開口部18予以區隔，只要 月t抑制來自該空間19之漩渦氣流往開口部18流入，則不需 包覆開口部18全周亦能達成本申請發明的效果。 舉例而言’如示於第3(a)圖之整流構件20E，亦可設有 壁部21E ’該整流壁部21E係以將開口部18當中位於與 空間19為相反側的位置的部份除外的方式來包覆開口部 32 201210965 18。示於第3(a)圖之整流構件2〇E，其橫截面形狀雖係c形， 但因該呈C形之整流壁部21E將空間19與開口部18予以區 隔，故能抑制來自空間19之旋渦氣流阻礙從流入側連接通 路15經由開口部18流動之上升氣流。因此，與前述已設置 整流構件20的情況相同，藉由將示於第3(a)圖之整流構件 20E適用於本發明之減壓脫泡裝置，能使氣流的流動安定 化’將源自熔融玻璃G之氣體成分的滞留安定並消除，且能 抑制減壓脫泡性能之參差，使減壓脫泡效果提升。 又，於本發明之減壓脫泡裝置中之整流構件，係如示 於第3(b)圖之整流構件20F，只要設有整流壁部21F，即能 抑制來自空間19之旋渴氣流往開口部18流入，而能達成本 申請發明之效果’該整流壁部21F，係以包覆開口部18當中 與空間19為相對側之至少半周的方式來區隔空間19與開口 部18。 示於第3(c)圖之整流構件20G，係具有導入部23G及導 出部24G且為管狀，其上面係由空間19側朝與空間19相反側 之方向下降而形成’導出部24G的開口係朝向氣體環境控制 部16内的流出側連接通路I4側。如第3(c)圖所示’藉由將前 述構造之整流構件20G以包圍開口部18的周圍來設置’而開 口部18則藉整流構件2 〇 G之整流壁部21G來與空間19作區 隔，可抑制源自空間19之漩渦氣流阻礙從流入側連接通路 15經由開口部18流動之上升氣流。另外，如第3(c)圖所示， 本發明之減壓脫泡裝置中之整流構件，該整流構件之導出 部係以設置成不朝向空間19側為宜。 33 201210965 示於第3(d)圖之整流構件20H，係具有導入部23H及導 出部24H且為管狀’其包圍開口部18周圍的壁部當中，位於 與空間19側相反側位置之壁面上部係呈一部份被切除之形 狀。於示於第3(d)圖之整流構件20H中，開口部18亦係以整 流構件20H之整流壁部21H來與空間19區隔，而能抑制來自 空間19之漩渦氣流阻礙從流入側連接通路15經由開口部18 流動之上升氣流。 第4(a)〜4(c)圖係顯示適用於本發明之減壓脫泡裝置 之整流構件的其他實施形態者，第4(a)圖係顯示第9實施形 態之整流構件的部份截面透視圖，第4(b)圖係顯示第10實施 形態之整流構件的部份截面透視圖，第4(c)圖係顯示第u 實施形態之整流構件的部份截面透視圖。 示於第4(a)圖之整流構件20J係呈管狀，該管狀係示於 第2(a)圖之整流構件2〇使其導出部以朝向與空間19相反方 向的方式經彎折之構造者。示於第4(a)圖之整流構件20J， 其區隔空間19與開口部18之整流壁部21J之内面22J，係以 作為導引面為其機能，該導引面係於整流構件20J内將已經 由開口部18與導入部23J流入之氣流往導出部24J誘導者。 示於第4(b)圖之整流構件20K亦與前述形態相同，能抑制來 自空間19之璇渦氣流阻礙從流入側連接通路15經由開〇部 18流動之上升氣流。 示於第4(b)圖之整流構件20K，其導引面呈以曲線般彎 曲而形成之構造，該導引面係形成於示於第4(a)圖之整流構 件20J中之整流壁部21J的内面22J。示於第4(b)圖之整流構 34 201210965 件20K，其整流壁部21K的内面22κ係以作為導引面為其機 能，該導引面係於整流構件20Κ内將已經由開口部18與導入 部23Κ流入之氣流往導出部24Κ誘導者。示於第4(b)圖之整 流構件20K亦與前述形態相同，能抑制來自空間19之旋渦氣 流阻礙從流入側連接通路i5經由開口部i 8流動之上升氣流。 又，於本發明之減壓脫泡裝置中，如示於第4(c)圖之整 流構件2GL ’其圓筒狀(管狀)之管軸方向係呈對垂直方向傾 斜之狀態’且其導出部2 4 L於與空間i 9相反方向處開口而構 成亦可。示於第4(c)圖之整流構件2〇L，其整流壁部21L的 内面22L係以作為導引面為其機能，該導引面係於整流構件 20L内將已經由開口部18與導入部现流入之氣流往導出部 24L誘導者。藉由將前述構造之整流構件2〇L如第4(c)圖所示 般設置於開口部18周g]，可抑制來自空間丨9之錢氣流阻礙 從流入側連接通路15經由開口部18流動之上升氣流。 於本發明之減壓脫泡裝置中，只要能消除源自溶融玻 璃之氣體成分的滞留，形成於舰玻璃G之上方的氣流流向 則不受特別限制。亦可與示於第丨圖之氣的流向為相反 方向，即’從減_泡槽3之下游側朝向上游側之氣流亦 可。此時，言史置於減壓脫泡槽3頂部之下游側的連接通路Μ 變為流出側連接通路’該流出側連接通_為從氣體環境 控制部16往減壓脫泡槽3流動之氣流的通路；而設置於減壓 脫泡槽3頂部之上游側的連接通路14變為流入側連接通 路’該流人側連接通路係為從減壓脫泡槽3往氣體環境控制 部16流動之氣流的通路。因❿，氣流之流通方向(循環方向) 35 201210965 為與示於第1圖之氣流F的流向呈相反方向時，只要令其為 於由連接通路14與氣體環境控制部16所形成的開口部周圍 設置前述之整流構件的構造即可。此種情況，因係將流入 側連接通路設置於較氣體環境控制部16之外周側壁部16D 更内側處，且因該流入側連接通路出口側的開口部周圍設 有整流構件，故能藉於氣體環境控制部16之外周側壁部16D 側的外周部所形成的空間側產生的漩渦氣流，來防止於流 入側連接通路上升之上升氣流受到阻礙。 又’於示於第1圖之減壓脫泡裝置100，其減壓脫泡槽3 之跨整個長度方向整體，雖形成有與熔融玻璃G之流向為同 一方向之氣流F，但只要能消除源自熔融玻璃G之氣體成分 的滯留，於熔融玻璃G之上部空間中亦可形成多數的氣流。 該多數的氣流係亦可與熔融玻璃G之流通方向相同，或為相 反方向亦可。 又’於經圖示之形態中，2條連接通路14、15之位置關 係雖為上游側及下游側，但連接通路之位置關係並不偈限 於此。舉例而言，亦可使2條連接通路之位置關係為圖式前 側及後側之關係。此種情況時’流動於減壓脫泡槽3與氣體 環境控制部16之氣流的方向’係成為與已圖示形態中之氣 流F的方向呈垂直相交的方向（氣體環境控制部16中之氣流 的方向係個別為，圖式前側及後側’或，圖式後側及前側）。 此種情況時，減壓脫泡槽3内之氣流F的方向，係變為與熔 融玻璃G之移動方向垂直相交的方向。如已圖示之形態，減 壓脫泡槽3於熔融玻璃G之移動方向上為長的形狀時，減壓 36 201210965 脫泡槽3内之熔融玻璃G上方之氣流F的方向，係與熔融玻璃 G之移動方向為同一方向或相反方向’而其就使源自熔融玻 璃G之氣體成分的滯留消除上而言是理想的，但減壓脫泡槽 為於縱横方向之長度上無有意義的差別之形狀(例如，減壓 脫泡槽之平面形狀為正方形、六角形、八角形等之形狀） 時’減壓脫泡槽3内之氣流F的方向，係與熔融玻璃〇之移動 方向呈垂直相交的方向，且能消除源自熔融玻璃G之氣體成 分的滯留。 另外，於本發明之減壓脫泡裝置100之中，利用以氣體 供給機構來供給氣體時’因只要能藉由流動於減壓脫泡槽3 内之熔融玻璃G的上部空間與氣體環境控制部丨6之氣流f， 來消除源自炫融玻璃G之氣體成分的滯留即可，故於減壓脫 泡實施中，未必有使氣流F於平時預先產生之必要。只要能 消除源自熔融玻璃G之氣體成分的滯留，亦可於減壓脫泡實 施中，定期地使氣流F產生’舉例而言，亦可於每1小時以1 〜30秒左右的比例來使氣流F產生。另外，為定期地使氣流 F產生，由氣體供給機構（圖示省略）定期地供給氣流ρ即可。 又，本發明之減壓脫泡裝置亦可具有前述以外之構 造。舉例而言’為了於炫融玻璃G的表面（液體表面）附近形 成氣流F ’亦可於減壓脫泡槽3之頂部的内側設置用以將氣 流F誘導至下方的檔板。 接下來，就示於第1圖之減壓脫泡裝置1〇〇之運作予以 說明。 於減壓脫泡裝置100，係將減壓脫泡槽3内部保持於小 37 201210965 於大氣壓之預定的減壓狀態，並將熔融玻璃G供至減壓脫泡 槽3。舉例而言，壓脫泡槽3其内部係被減壓至51〜 613hPa(38〜460mmHg)。減壓脫泡槽3之内部係以被減壓至 80 〜338hPa(60 〜253mmHg)更佳。 使用本實施形態之減壓脫泡裝置10 0來減壓脫泡的玻 璃G只要是以加熱炼融法所製造之玻璃，則其組成上不受限 制。因此，為由鈉約玻璃所代表之鈉詞矽系玻璃 (soda-lime-silica glass)或如鹼金族硼石夕玻璃 (alkali-borosilicate glass)之驗玻璃亦可。 若屬於使用於建築用或車輛用之平板玻璃的鈉鈣玻璃 時，其以氧化物為基準之質量％表示，以具有以下之組成 為宜：Si02 : 65 〜75%、Al2〇3 : 0〜3%、CaO : 5〜15%、 MgO : 0〜15%、Na20 : 10〜20%、K20 : 0〜3%、Li20 : 0 〜5%、Fe203 : 0〜3%、Ti02: 0〜5%、Ce02 : 0〜3%、BaO : 0〜5%、SrO : 0〜5%、B2〇3 : 0〜5%、ZnO : 0〜5%、Zr02 : 0〜5%、Sn02 : 0〜3%及S03 : 0〜0.3%。 若屬於使用於液晶顯示器用之基板的無鹼玻璃時，其 以氧化物為基準之質量％表示，以具有以下之組成為宜： Si02 : 39〜70%、Al2〇3 : 3〜25%、B2〇3 : 1 〜20%、MgO : 0〜10%、CaO : 0〜17%、SrO : 0〜20%及BaO : 0〜30%。 若屬於使用於電漿顯示器用之基板的混鹼系玻璃時， 其以氧化物為基準之質量％表示，以具有以下之組成為 宜：Si02 : 50〜75%、Al2〇3 : 0〜15%、MgO + Ca〇+SrO + BaO + ZnO : 6〜24%及Na20 + K20 : 6〜24%。 38 201210965 與本發明相關之玻璃製品之製造裝置係設有以下之裝 置者.前述減歷脫泡裝置1 〇〇，炼融機構(炼融裝置），甘設 置於較減壓脫泡裝置1〇〇上游側’並將玻璃原料熔融而製造 出融玻璃，成形機構(成形裝置)2〇〇 ’其設置於較減壓脫泡 裝置100下游側’並將熔融玻璃予以成形；及緩冷卻機構(緩 冷卻裝置）’其使成形後之玻璃進行緩冷卻。另外，關於溶 融機構、成形機構、緩冷卻機構係眾所周知技術之範圍。 舉例而言，於熔融機構中，將已調整成所欲之組成的玻璃 原料投入熔融槽’按照玻璃種類之預定溫度，如為建築用 或車輛用等之鈉鈣玻璃時，加熱至約1400〜1600t將玻璃 原料熔融而製得溶融玻璃。而例如成形機構，則可舉利用 浮製玻板法、溶融法（fusion process)或溢流向下抽出法 (down-load method)等之成形裝置為例。 前述製法之中又以使用用於浮製玻板法之浮式浴(float bath)的成形機構因能大量地製造從薄板狀玻璃至厚板狀玻 璃之厚度範圍廣的高品質玻璃板的緣故而佳。而例如緩冷 卻機構，一般係使用緩冷卻爐，該緩冷卻爐係設有將成形 後之玻璃溫度予以緩慢地降低的機構。將溫度予以緩慢地 降低的機構，係利用燃燒氣體或電熱器，將其輸出已受控 制之熱量供至爐内之必要位置以將成形後之玻璃進行緩冷 卻。藉此，能將成形後之玻璃内的殘留應力去除。 接著，將就本發明之玻璃製品之製造方法予以說明。 第5圖為流程圖，係本發明之玻璃製品之製造方法的一實施 形態。 39 201210965 本發明之玻璃製品之製造方法係以使用前述減壓脫泡 裝置100為特徵。本發明之玻璃製品之製造方法，其—例係 如下述步驟之玻璃製品之製造方法： 熔融步驟K1，其利用前述之減壓脫泡裝置100之前段的 熔融機構將熔融玻璃原料熔融而製造出熔融玻璃； 脫泡步驟K2,其利用前述之減壓脫泡裝置1〇〇以進行熔 融玻璃之減壓脫泡； 成形步驟K 3 ’其於較前述之減壓脫泡裝置i 〇 〇下游側將 熔融玻璃予以成形； 緩冷部步驟K4，其於之後步驟中使熔融玻璃進行緩冷 卻； 裁切步驟K5，其係將緩冷卻後之玻璃予以裁切而製得 玻璃製品K6。 本發明之玻璃製品之製造方法除了利用前述之減壓脫 泡裝置100之外，係眾所周知技術之範圍。又’關於在本發 明之玻璃製品之製造方法所利用之裝置係如前述。於第5圖 顯示著本發明玻璃製品之製造方法的構成要素，即熔融步 驟、及成形步驟以及緩冷卻步驟，更加上依需要使用之裁 切步驟，亦顯示有其他之後續步驟。 實施例 以下將根據實施例具體地說明本發明，但本發明並非 因此而受限定者。 於實施例’係使用熱流體分析軟體FLUENT(F luent公司） 來進行於減壓脫泡槽内之熔融玻璃G之上部空間中的氣流 40 2〇l2l〇965 分析，就利用流動於減壓脫泡槽内之熔融玻璃的上部空間 與氣體環境控制部之氣流（於本分析中係循環之氣流）來消 除;原、自炫融玻璃之氣體成分的滯留予以評價。另外，作為 減壓脫泡裝置者，如示於第6圖之減壓脫泡裝置〗oob，其係 從減壓脫泡槽3之上游側頂部之連接通路14之開口部的氣 體導入點A(距離熔融玻璃G表面的高度屯為38〇1〇1,減壓脫 泡槽3之上游側端部為0.1m)以從上游朝向下游45度的角 度，將106(TC之A氣體以體積流量251^/111111來供給者經予 以模式化者。另外，示於第6圖之減壓脫泡裝置B，係僅顯 示使用於模擬分析之計算模式的減壓脫泡槽與氣體環境控 制部附近之主要部份，對其與示於第丨圖之構成要素相同的 要素賦予了相同的符號。 經作為模式使用之減壓脫泡裝置100B之各部尺寸係如 以下所述。 ” •減壓脫泡槽3 :全長Ll = 10m、高度di==lm (截面半 圓形）、熔融破璃G之上部空間高度d3 = 〇.5m .軋體環境控制部16 :全長L2=llm、高度(圓 •連接管ΜΑ、MA :全長〇.8m、内徑〇.3m(圓筒狀） 連接管14A係令其位於距減壓脫泡槽3之上游側端部 Ο-lm，及自氣體環境控制部16之上游側端部為〇6爪之位 置。而連接管15A係令其位於距減壓脫泡槽下游側端邛 〇.lm之位置，開口部則係令其從氣體環境控制部16之下斿 側端部之内壁的距離〇1為〇 6rn。 41 201210965 •排氣口 17 :内徑0.05m。設置於氣體環境控制部16 之長度方向中央的頂部。 就下述情況予以進行分析：減壓脫泡槽3内之熔融玻璃 G之上部空間内的壓力及氣體環境控制部16内的壓力 350mmHg、減壓脫泡槽3的溫度1400°C、氣體環境控制部16 之頂部]6A的溫度100°C、氣體環境控制部16之底部16B的 溫度200°C。 氣流分析係採用了無反應化學物種之輸送模式、標準 k-ε模式、標準壁函數。而關於入口擴散、擴散能量及減 壓脫泡槽3内之熔融玻璃G的動態係不予考慮，其他之設定 參數使用了預設值。氣流分析之流體性質，係使用了 FLUENT資料庫内之由N2及揮發H20所構成之混合物的值 (下述）。 •黏度：1.72xl0_5[kg/m-s] •熱傳導率：〇.〇454[W/m.K] •質量擴散係數：2.88xl(T5[m2/S] •密度：=pMw/RT(非壓縮性理想氣體方程式） •比熱：cp= Σ iYjCp，i(依據化學物種之比熱的質量分 率平均式）[J/kg_K] 推測從減壓脫泡槽3内之熔融玻璃G會有S03、02、 b2o3、H20等多數的氣體揮發，但本分析權宜上假定僅H20 自溶融玻璃G的表面以體積流量14.55NL/min垂直向上地揮 發。 (實施例） 42 201210965 如第6圖及第2(a)圖所示，於連接通路（流入側連接通 路）15之開口部18的周圍，已根據自重設置一厚度為 1.0mm、内徑為〇_3m、高度(圓筒狀)之整流構件2〇。 (比較例） 除了不設置整流構件之外，與實施例以相同條件進行 了模擬分析。 於第7(a)、7(b)圖’顯示實施例及比較例之鄰近連接通 路15之氣體環境控制部16的氣流分析結果。第7(a)圖係顯示 實施例之氣流分析結果的圖，第7(b)圖係顯示比較例之氣流 分析結果的圖。如於第7(a)圖所示，於流入側連接通路15 出口側的開口部18的周圍已設有整流構件2〇之本發明相關 實施例中，從流入側連接通路15經由開口部18往氣體環境 控制部16流入之氣流S1，其不會受到漩渦氣流S2阻礙，形 成安定的氣流。相對於此，於示於第7(b)圖的比較例中，來 自外周部的空間之漩渦氣流S2，則阻礙著從流入側連接通 路15經由開口部18往氣體環境控制部16流入之氣流&的上 升。因璇滿氧流S2的強度係會依據上升氣流s 1的強度或周 圍的溫度環境等而變化之故，於如此狀況下上升氣流“的 流動會變得不安定，而其成為原因使氣流F也變得不安定。 依據此結果，設有整流構件20之本發明相關減壓脫泡裝 置’其因使循環於減壓脫泡槽内之熔融玻璃的上部空間與 氣體％境控制部之氣流的流速安定化，而能將源自熔融坡 璃之氣體成分的滯留予以安定並消除，並能抑制減壓脫泡 性能的參差’使減壓脫泡的效果提升。 43 201210965 第8圖’係關於實施例與比較例，將其等之減壓脫泡槽 3内之熔融玻璃G的上部空間的壓力，予以描出從上游側炱 下游側的位置點所製的圖。於第8圖中，横軸係相對於滅魘 脫泡槽3之全長，將從減壓脫泡槽之上游側端部（上游端）的 位置經予以規格化之座標（規格化座標），縱軸則係比較例中 之減壓脫泡槽3内之熔融玻璃G上部空間的上游端的壓力令 其為1經規格化之壓力（規格化壓力）。依據第8圖之結果，於 已設有整流構件20之本發明相關實施例，其減壓脫泡槽3内 之熔融玻璃G上部空間的上游端與下游端的壓力差比起比 較例變得較大，可知熔融玻璃G上部空間的氣流之流動（循 環）狀態良好。相對於此，於比較例則可知，因減壓脫泡槽 3内之熔融玻璃G上部空間的上游端與下游端的壓力差小’ 故熔融玻璃G上部空間的氣流之流動（循環)微弱。推測此係 因如第7(a)、7(b)圖所示，於無整流構件2〇之比較例，通過 流入側連接通路〗5之開口部18附近之氣流的上升氣流，被 來自外周部之空間的漩渦氣流所妨礙，而隨著開口部18附 近氣流的流速降低的同時，因被妨礙之氣流的一部份會往 減壓脫泡槽3之下游端側逆流之故，而使減壓脫泡槽3之下 游側之熔融玻璃G上部空間的壓力上升。 第9圖，係顯示關於實施例與比較例其等之從減壓脫泡 槽3經由連接通路14往氣體環境控制部16排出之氣體（上游 排出氣體）的流量，及，從減壓脫泡槽3經由流入側連接通 路15往氣體環境控制部丨6排出之氣體（下游排出氣體）的流 量的圖。於第9圖中，各氣體之排出流量係令實施例之下游 44 201210965 排出氣體的流量為1來規格化並予以顯示。依據第9圖之結 果，可知於已設有整流構件20之本發明相關實施例，其上 游排出氣體的流量為負’即，氣流從氣體環境控制部16經 由連接通路14往減壓脫泡槽3流動著，氣流的流動(循環)狀 態良好。相對於此，於比較例可知，上游排出氣體的流量 為正’即’氣流從減壓脫泡槽3經由連接通路14往氣體環境 控制部16流動著，於熔融玻璃G之上部空間中，從上游側往 下游側流動之氣體流量減少，氣流的流動(循環)微弱。 依據以上之結果，設有整流構件之本發明相關減壓脫 泡裝置，其流動於減壓脫泡槽内之熔融玻璃上部空間與氣 體¥丨兄控制部的氣流流速被安定化，能將源自炫融玻璃之 氣體成分的滯留予以安定並消除’並能抑制減壓脫泡性能 的參差，使減壓脫泡的效果提升。 產業上之可利用性 若利用本發明之減壓脫泡裝置’可使減壓脫泡的效果 提升，能生產性良好地製造高品質之玻璃製品。本發明之 減壓脫泡裝置、減壓脫泡方法、玻璃製品之製造裝置及玻 璃製品之製造方法’係能利用於建材用、車輛用、液晶顯 示裝置.電漿顯示裝置.有機電激發光顯示器裝置等之平板 顯示器用、光學用、醫療用、及其他範圍廣泛的玻璃製品 之製造。 另外，在此援引已於2010年7月30曰提出申請之日本專 利申請案2010-172230號之說明書、申請專利範圍、圖式以 及摘要之全部内容’將其納入用以作為本發明之揭示。 45 201210965 【圖式簡單說明3 第1圖為結構圖，顯示與本發明相關之減壓脫泡裝置之 一例的概略縱截面構造，與於該裝置連接有成形裝置之狀 態。 第2圖係顯示適用於第1圖所示之減壓脫泡裝置之整流 構件的各實施形態者； 第2(a)圖係顯示第1實施形態之部份截面透視圖； 第2(b)圖係顯示第2實施形態之部份截面透視圖； 第2(c)圖係顯示第3實施形態之部份截面透視圖； 第2(d)圖係顯示第4實施形態之部份截面透視圖。 第3圖係顯示適用於第1圖所示之減壓脫泡裝置之整流 構件的各實施形態者； 第3(a)圖係顯示第5實施形態之部份戴面透視圖； 第3(b)圖係顯示第6實施形態之部份截面透視圖； 第3(c)圖係顯示第7實施形態之部份截面透視圖； 第3(d)圖係顯示第8實施形態之部份截面透視圖。 第4圖係顯示適用於第1圖所示之減壓脫泡裝置之整流 構件的各實施形態者； 第4(a)圖係顯示第9實施形態之部份截面透視圖； 第4(b)圖係顯示第10實施形態之部份截面透視圖； 第4(c)圖係顯示第11實施形態之部份截面透視圖。 第5圖為流程圖，顯示與本發明相關之關於玻璃製品之 製造方法的步驟之一例。 第6圖為縱截面圖，顯示經使用於實施例之模擬分析的 46 201210965 減壓脫泡 第7(a)圖係顯示實施例之氣流解析結果之圖，第7(b)圖 則係顯不比較例之氣流解析結果之圖。 第8圖為圖表’係將實施例及比較例的減壓脫泡槽内之 ，熔融玻璃上部空間的壓力經圖示化者。 第9圖為圖表，顯示關於實施例及比較例，其等之從減 壓脫泡槽經由流丨側連接通路往氣體環境控制部排出的氣 體(上私排出氣體)之流量與從自減壓脫泡槽經由流入側連接 通路在赠環触卿排Λ的氣體(下簡it{氣體)之流量。 第1〇圖係於習知之減壓脫泡裝置中，流入側連接通路 連接於氣體環境控制部，且於氣Μ境控制部之外周部形 成有空間時，將於該空間與流人側連接通路與開口部附近 之氣流舉動模式地顯示之圖。 【主要元件符號說明】 1…炼融槽 2…減壓室 2a…減壓室之底部側之導入口 2b…減壓室之底部側之導出口 3…減壓脫泡槽 3a…導入α 3b…導出口 5…上升管 6…下降管 7···隔熱材料 8…外管 8a…外管8之下端 9…外管 9a…外管9之下端 11…導管 12…上游槽 13…下游槽 14···連接通路(流出側連接通路) 14Α·__連接管(流出側連接管） 15···連接通路(流入側連接通路) 47 201210965 15 A…連接管(流入側連接管） 16…氣體環境控制部 16 A…氣體環境控制部之頂部 16B···氣體環境控制部之底部 16D…氣體環境控制部之側壁部 16a…氣體環境控制部之外周 部側壁 16b…氣體環境控制部之外周 部頂部 16c···氣體環境控制部之外周 部底部 Π…排氣口 18…開口部 19…氣體環境控制部之外周部 的空間 20、20B、20C、20D、20E、20F、 20G、20H、20J、20K、20L... 整流構件 21 '21B'21C'21D'21E'21F ' 21G、21H、21J、21K、21L." 整流壁部 22、 22J、22K、22L…整流壁 部内側(導引面） 23、 23B、23C、23D、23G、 23H、23J、23K、23L.” 導入部 24、 24B、24C、24D、24H、 24J、24K、24L·.·導出部 100、100B…減壓脫泡裝置 200···成形裝置 F…氣流 G…炼融玻璃 S1…上升氣流 S2…旋调氣流 K1-K6…步驟 48In the vacuum degassing apparatus of the prior art, the inflow side connecting pipe 15A is connected to the gas environment control unit 16 and the space of the outer peripheral portion of the gas environment control unit 16 is formed (outer peripheral side wall 16a and outer peripheral part top) 16b and the space surrounded by the outer peripheral bottom portion 16c) 19, a view showing the dynamic mode of the airflow in the vicinity of the space 19 and the inflow side connecting pipe 15A and the opening 18. In the vacuum degassing apparatus, the temperature of the gas environment control unit 16 is lower than the temperature of the vacuum degassing tank 3 through which the molten glass G flows, and is also in the top portion 16A of the gas environment control unit 16 and the gas environment control unit. The bottom of 16 is 16B, the top 16A is lower than the bottom 16B 23 201210965, and the temperature difference is, for example, around. Therefore, in the outer peripheral portion 16b of the gas environment control portion 16 and the outer peripheral portion bottom portion 16c of the gas atmosphere control portion 16, the temperature of the outer peripheral portion top portion 16b is lower than the temperature of the outer peripheral portion bottom portion 16c. In the gas environment control unit 16 in such a temperature environment, the upward flow S1 of the airflow ρ rising from the pressure-reduction degassing tank 3 in the inflow-side connecting passage 15 flows into the gas environment control unit 16 through the opening 18, and then a part thereof The space 19 flowing to the outer peripheral portion of the gas environment control unit 16 is cooled in the gas environment control unit 16 with respect to the outer peripheral portion top portion 16b having a low upper temperature, and is lowered toward the outer peripheral portion bottom portion 16c. As a result, the swirling airflow S2 shown in Fig. 1 is generated in the space 19 in the outer peripheral portion of the gas environment control unit 16. When the space 19 in the outer peripheral portion of the gas environment control unit 16 generates the swirling airflow S2, the ascending airflow S1 that rises in the inflow-side connecting passage 15 formed inside the space 19 meets the swirling airflow S2 in the vicinity of the opening 18. The flow of the ascending airflow S1 is blocked by the vortex airflow S2. As a result, the flow of the ascending airflow S1 is blocked by the vortex flow S2, and the airflow f of the molten glass G flowing in the vacuum degassing tank 3 and the gas atmosphere control unit 16 becomes unstable. Fig. 7(b) shows a space 19 and an inflow side when the inflow-side connecting passage 15 is connected to the gas-environment control unit 16 and the space 19 of the outer peripheral portion of the gas-environment control unit 16 is formed in the embodiment to be described later. A graph showing the results of simulation analysis of the dynamics of the airflow in the vicinity of the opening 15 and the opening 18. As shown in Fig. 7(b), the swirling airflow S2 from the space 19 in the outer peripheral portion blocks the flow of the airflow (upward airflow) S1 flowing from the inflow-side connecting passage 15 through the opening 18 to the gas environment control unit 16. Since the intensity of the vortex flow S2 changes due to the strength of the airflow s 1 of 201210965 or the surrounding temperature environment, the flow of the updraft S1 becomes unstable in such a situation, and it becomes the cause of the airflow F. Become unstable. In addition, as described above, a part of the ascending airflow S1 in which the inflow of the gas atmosphere control unit 16 is blocked in the vicinity of the opening 18 is estimated to be in the lower portion of the downstream side of the molten glass G in the vacuum degassing tank 3. Space countercurrent. If the ascending airflow S1 produces a reverse flow, the circulation state of the airflow ρ may become unstable. In order to suppress the obstruction of the ascending airflow si by the swirling airflow S2 and to stabilize the airflow Fa from the opening 18, the vacuum degassing apparatus 100 of the present embodiment is an inflow side connecting passage in the gas environment control unit 16. A structure of the rectifying member 20 is provided around the opening portion 18 on the outlet side, and the inflow-side connecting passage 15 is located on the side where the airflow f flows from the decompression defoaming tank 3 to the gas environment control portion 16 and the airflow F contains The gas component produced by the molten glass G. The flow regulating member 20 is provided to prevent the swirling airflow S2 as shown in FIG. 1 from interfering with the flow of the ascending airflow S1, and is provided with a rectification of the space 19 of the outer peripheral portion of the partition opening 18 and the gas environment control unit 16. Wall portion 21. The second (a) diagram is an embodiment in which a rectifying member is provided in the vacuum degassing apparatus 1A of the present embodiment, and the vicinity of the rectifying member of the decompression defoaming device 1 is enlarged and displayed. Partial cross-sectional perspective. The rectifying member 20' shown in Fig. 2(a) is provided with a space 19 on the outer peripheral portion of the gas atmosphere control portion 16 and a rectifying wall portion 21 of the opening portion 18 so as to cover the entire circumference of the opening portion 18, and It is tubular (ie, cylindrical). At the bottom of the tubular flow regulating member 2A, an introduction portion 23 is formed, and the gas introduced from the opening portion 18 of the inflow-side rectifying member 20 is introduced into the rectifying member 20, 25 of the rectifying member 20 201210965 On the upper surface, a lead-out portion 24 that guides the gas that has been introduced into the flow regulating member 20 from the opening portion 18 to the gas environment control portion 16 is formed. In the flow regulating member 20 shown in Fig. 2(a), the space 19 of the outer peripheral portion of the gas-environment control unit 16 and the rectifying wall portion 21 of the opening 18 suppress the vortex flow S2 generated in the space 19 from opening to the opening. 18 inflows. Therefore, it is possible to prevent the upward flow of air S1 flowing through the inflow-side connecting passage 15 and to meet the a sinus vortex flow S2 in the vicinity of the opening 18, and to prevent the flow of the ascending airflow S1 from being hindered. The seventh embodiment (a) shows a gas environment control unit 16 when the rectifying member 20 having the shape shown in the second (a) is provided around the opening 18 on the outlet side of the inflow-side connecting passage 15 in the embodiment to be described later. A graph of the results of simulation analysis of the dynamics of the airflow in the outer peripheral space 19 and the inflow-side connecting passage 15 and the vicinity of the opening 18. As shown in Fig. 7(a), the flow regulating member 2 is provided around the opening 18 on the outlet side of the inflow-side connecting passage 15, and the airflow F flowing from the inflow-side connecting passage 15 through the opening 18 to the gas-environment control unit 16 (Upward flow S1) 'The flow velocity of the airflow F can be stabilized without being obstructed by the vortex flow S2 from the space 19. As a result, it is clear that the vacuum degassing apparatus of the present embodiment transmits the rectifying member 20 around the opening 18 on the outlet side of the inflow-side connecting passage 15 of the gas-environment control unit 16 . The flow velocity of the airflow F in the upper space of the molten glass G flowing in the vacuum degassing tank 3 and the gas environment control unit 16 is stabilized, and the retention of the gas component derived from the molten glass g can be eliminated. The unevenness of the foaming performance enhances the effect of degassing under reduced pressure. The opening size of the introduction portion 23 of the flow regulating member 20, the opening 26 of the outlet portion 24, the size of the 201210965, and the internal space of the flow member 20 (the inner diameter of the flow regulating member 20) are such that the flow F can be prevented without impeding the flow of the airflow F. The flow stability is set to be larger than the size of the opening portion 18. The inner surface 22 of the rectifying wall portion 21 of the flow regulating member 20 functions as a guide surface for inducing the air flow of the air flow F (i.e., the flow path of the air flow F). The guide surface may be formed by the rectifying member 20 shown in Fig. 2(a), and the outlet portion 24 is formed above the opening 18 to induce the airflow F from the opening portion 18 to the upper side in the vertical direction. In the embodiment shown in Figs. 4(a) to 4(c) to be described later, the lead-out unit 24 is formed so as to face the outflow-side connecting passage 14 side of the gas-environment control unit 16, and is controlled by the airflow F in the gas atmosphere. The inside of the portion 16 is induced to flow from the inflow-side connecting passage 15 side to the outflow-side connecting passage 14 side. When the guide surface of the inner surface 22 of the rectifying wall portion 21 of the flow regulating member 20 is set so as not to induce the air flow F toward the space 19, the circulation shown in Fig. 1 is formed in the vacuum degassing tank 3. The upper space of the molten glass G and the air flow F of the gas environment control unit 16. The flow regulating member 20 is formed of a material excellent in heat resistance, and examples thereof include a ceramic-based non-metallic inorganic material, a dense refractory, and the like. Specific examples of the dense refractory include alumina electrocast refractory, zirconia electrocast refractory, and alumina-yttria-oxidized oxide. Refractory (alumina-zirconia-silica electrocast refractory) and other electric towns and fires' and dense alumina refractories, dense oxidized erbium-oxidized oxide refractories and dense oxides - oxidized hammers For example, a compact fired material such as a bismuth refractory is used. 27 201210965 The maximum value h of the height of the flow regulating member 20 is set to satisfy l/4Sh/HS3 when the indoor height of the gas environment control unit 16 at the position where the opening 18 is formed in the inflow-side connecting passage 15 is Η. The relationship of /4 is preferable because it does not hinder the flow of the ascending air current, and it is more preferable to set it so as to satisfy the relationship of l/3Sh/HS2/3 because the flow of the ascending airflow is not hindered. The size of the rectifying member 20 can be appropriately selected in accordance with the vacuum degassing apparatus used. The size of each component of the vacuum degassing apparatus of the present invention can be appropriately selected as needed. An example of the size of each component will be shown below. Further, the size of the flow regulating member 20 shown below can be applied to the flow regulating members 20B to 20L of the second to eleventh embodiments to be described later. [Depressurization degassing tank 3] The size of the vacuum degassing tank of the vacuum degassing apparatus of the present invention is selected according to whether the vacuum degassing tank is made of platinum or platinum alloy or is made of dense refractory. Further, it can be appropriately selected in accordance with the shape of the vacuum degassing apparatus or the vacuum degassing tank to be used. When the vacuum degassing tank 3 shown in Fig. 1 has a cylindrical shape, one of the dimensions is as follows. . Length in the horizontal direction: 1~20m • Inner diameter _· 0. 2~3m (circular cross section) When the vacuum degassing tank 3 is made of platinum or platinum alloy, the thickness is preferably 4mm or less, preferably 0. 5~1. 2mm. The vacuum degassing tank 3 is not limited to a cylindrical shape having a circular cross section, and its cross-sectional shape may be an elliptical or semi-circular shape, or a rectangular cross section. [Rising pipe 5 and descending pipe 6] 28 201210965 The rising pipe 5 and the descending pipe 6 are selected depending on whether it is made of platinum or platinum alloy, or whether it is dense fire resistance, and can be appropriately used according to the vacuum degassing device used. Make choices. For example, in the case of the vacuum degassing apparatus 1 shown in Fig. 1, an example of the dimensions of the riser 5 and the downcomer 6 is as follows. • Inner diameter: 0. 05~0. 8m, preferably ο ι~〇. 6m . Length: 0. 2~6m, preferably 0. 4~4m When the riser 5 and the downcomer 6 are made of platinum or platinum alloy, the thickness is 0. 4~5mm is preferred, preferably 0. 8~4mm. [Gas Environment Control Unit 16] The size of the gas environment control unit 16 can be appropriately selected in accordance with the vacuum degassing apparatus to be used, in particular, the vacuum degassing tank 3. An example of this is as follows. • Inner diameter: 0_1~3m, better system. 1~2m • Length: 0. 8 to 22 m, preferably 1 to 20 m. • The height of the opening 18 is the indoor height of the position: 0. 1~3m, preferably 〇1 〜2m The thickness of the gas% control unit 16 may vary depending on the constituent materials, but when it is not recorded, it is 0. 5 ~ 2mm is appropriate, better system. 5~1 5mm. [Outflow-side connecting pipe 14A and inflow-side connecting pipe 15A] The size of the outflow-side connecting pipe 14A and the inflow-side connecting pipe 15A can be appropriately selected in accordance with the vacuum degassing apparatus used, in particular, the vacuum degassing tank 3 An example of this is as follows. . Inner diameter: 0. 05~0. 5m, preferably 0. 05~0. 3m • length. 0. 1~lm, preferably 0. 1 ~ 〇. 8m 29 201210965 The thickness of the outflow side connecting pipe 14A and the inflow side connecting pipe 15A may vary depending on the constituent materials, but when it is made of stainless steel, it is preferably 5 to 2 mm, preferably 0. 5~1. 5mm. The distance D1 between the opening 18 (the inner peripheral surface of the inflow-side connecting pipe 15A) and the inner surface of the outer peripheral side wall 16a of the gas-environment control portion 16 may vary depending on the thickness of the inflow-side connecting pipe 15A. Preferably, 〇5 to 2 m, preferably 〇〇5 to lm 0 [rectifying member 20] Although the size of the rectifying member 20 is due to the size of the gas environment control unit 、6, the inner diameter or setting of the inflow side connecting pipe 15A The position (that is, the size or formation position of the opening portion 18) is different, but the relationship between the height h of the rectifying member 2 and the indoor height Η of the position at which the opening portion 18 of the gas environment control portion 16 is formed is It is better to satisfy l/4$h/H$3/4, and it is better to satisfy l/3Sh/H$2/3. Specifically, for example, the height h of the rectifying member 2 is 0. 03~2m is preferred, preferably 0. 05~lm. The thickness ' of the flow regulating member 20' may vary depending on the constituent material, but is preferably 1 to 50 mm, more preferably 2 to 30 mm. The size of the introduction portion 23, the lead-out portion 24, and the internal space of the flow regulating member 20 differ depending on the size of the inflow-side connecting pipe 15A and the opening portion 18, etc., so that the flow of the airflow f from the opening portion 18 is not hindered. In the embodiment, the size of the introduction portion 23, the lead portion 24, and the internal space of the flow regulating member 20 is set to be larger than the size of the opening portion 18. As an example, when the tubular (tubular) rectifying member 20 shown in the second (a) is used, the inner diameter of the rectifying member 20 is set to be larger than the size of the opening 18 by 5% to 5%. Preferably, in particular, 30 201210965, it is preferable to set the inner diameter of the rectifying member 20 to be larger than the size of the opening portion 18 to 0_5 m, which is preferably set to be larger than 0 to 〇·2ηι. The rectifying member provided in the vacuum degassing apparatus of the present invention is not limited to the cylindrical rectifying member 2A shown in Fig. 2(a). Hereinafter, other aspects of the flow regulating member in the vacuum degassing apparatus of the present invention will be described based on Figs. 2(a) to 4(c). Further, in the flow regulating members shown in Figs. 2(a) to 4(c), the material, the desired shape, the installation position, and the like are the rectifying members 2 shown in Fig. 2(a). The same is true. In the second (b) to (d) diagrams, another embodiment of the flow regulating member applied to the vacuum degassing apparatus of the present invention is shown, and the second (b) diagram shows the portion of the flow regulating member according to the second embodiment. Fig. 2(c) is a partial cross-sectional perspective view showing the flow regulating member of the third embodiment, and Fig. 2(d) is a partial sectional perspective view showing the flow regulating member of the fourth embodiment. The rectifying member 2'b shown in Fig. 2(b) is a tubular portion having a quadrangular cross-sectional shape and having a quadrangular introduction portion 23B and a lead-out portion 24B. As shown in Fig. 2(b), 'the rectifying member 2B of the above-described structure is disposed to surround the periphery of the opening portion 18, and the opening portion 18 is separated from the space 19 by the rectifying wall portion 21B'. The vortex flow from the space 19 blocks the upward flow of air flowing from the inflow-side connecting passage 15 through the opening 18. Therefore, the flow of the airflow can be stabilized by applying the flow regulating member 20B shown in Fig. 2(b) to the vacuum degassing apparatus of the present invention, as in the case where the flow regulating member 20 is already provided. The stability of the gas component derived from the molten glass G is stabilized and eliminated, and the variation in the vacuum degassing performance can be suppressed, and the vacuum degassing effect can be improved. The flow regulating member 2〇c shown in Fig. 2(c) has a tubular shape in which the cross-sectional shape is a triangle 31 201210965 and has a triangular introduction portion 23C and a lead-out portion 24C. As shown in Fig. 2(c), the rectifying member 2〇c of the above-described configuration is provided to surround the periphery of the opening portion 18, and the opening portion 18 is partitioned from the space 19 by the rectifying wall portion 21c. It is possible to suppress the vortex flow from the space 19 from blocking the upward flow of air flowing from the inflow-side connecting passage 15 through the opening portion 18. The rectifying member 2 〇 d ' shown in Fig. 2(d) has a tubular shape in a teardrop shape and has a teardrop-shaped introduction portion 23D and a lead portion 24D. As shown in Fig. 2(d), the rectifying member 20D of the above-described configuration is provided to surround the periphery of the opening portion 18, and the opening portion 18 is partitioned from the space 19 by the curved rectifying wall portion 21D. It is possible to suppress the vortex flow from the space 19 from blocking the upward flow of air flowing from the inflow-side connecting passage 15 through the opening portion 18. 3(a) to 3(d) show other embodiments of the flow regulating member applied to the vacuum degassing apparatus of the present invention, and Fig. 3(a) shows a part of the flow regulating member of the fifth embodiment. a cross-sectional perspective view, a third (b) view showing a partial cross-sectional perspective view of the rectifying member of the sixth embodiment, and a third (c) view showing a partial cross-sectional perspective view of the rectifying member of the seventh real form, 3(d) shows a partial cross-sectional perspective view of the rectifying member of the eighth real form. The rectifying member in the vacuum degassing apparatus of the present invention separates the space 19 of the outer peripheral portion of the gas ring sibling control portion 16 from the opening portion 18, and suppresses the vortex flow from the space 19 to the opening as long as the month t When the portion 18 flows in, the effect of the present invention can be achieved without covering the entire circumference of the opening portion 18. For example, as shown in the rectifying member 20E shown in Fig. 3(a), a wall portion 21E may be provided. The rectifying wall portion 21E is a portion of the opening portion 18 located on the opposite side to the space 19. Except the way to cover the opening 32 201210965 18 . The rectifying member 2A shown in Fig. 3(a) has a c-shaped cross-sectional shape, but since the C-shaped rectifying wall portion 21E separates the space 19 from the opening portion 18, it can suppress the coming from The vortex flow of the space 19 blocks the upward flow of air flowing from the inflow-side connecting passage 15 through the opening 18. Therefore, as in the case where the rectifying member 20 is provided as described above, by applying the rectifying member 20E shown in Fig. 3(a) to the vacuum degassing apparatus of the present invention, the flow of the airflow can be stabilized. The retention of the gas component of the molten glass G is stabilized and eliminated, and the variation in the decompression and defoaming performance can be suppressed, and the decompression and defoaming effect can be improved. Further, the rectifying member in the vacuum degassing apparatus of the present invention is the rectifying member 20F shown in Fig. 3(b), and if the rectifying wall portion 21F is provided, the swirling air flow from the space 19 can be suppressed. The opening portion 18 flows in, and the effect of the present invention can be achieved. The rectifying wall portion 21F partitions the space 19 and the opening portion 18 so as to cover at least a half of the opening portion 18 opposite to the space 19 . The flow regulating member 20G shown in Fig. 3(c) has a tubular portion having a lead-in portion 23G and a lead-out portion 24G, and the upper surface thereof is lowered from the space 19 side toward the side opposite to the space 19 to form an opening of the 'derivation portion 24G. The flow is directed to the outflow side connection passage I4 side in the gas environment control unit 16. As shown in Fig. 3(c), 'the rectifying member 20G of the above-described configuration is provided to surround the periphery of the opening portion 18', and the opening portion 18 is made by the rectifying wall portion 21G of the rectifying member 2 〇G and the space 19 The partition suppresses the vortex flow from the space 19 from blocking the upward flow of air flowing from the inflow-side connecting passage 15 through the opening 18. Further, as shown in Fig. 3(c), in the rectifying member in the vacuum degassing apparatus of the present invention, the outlet portion of the rectifying member is preferably disposed not to face the space 19. 33 201210965 The rectifying member 20H shown in Fig. 3(d) has an introduction portion 23H and a lead-out portion 24H and is a tubular portion which surrounds the wall portion around the opening portion 18 and is located at the upper portion of the wall opposite to the space 19 side. The shape is partially cut off. In the rectifying member 20H shown in Fig. 3(d), the opening portion 18 is also partitioned from the space 19 by the rectifying wall portion 21H of the rectifying member 20H, and the vortex airflow from the space 19 can be suppressed from being blocked from the inflow side. The ascending airflow that the passage 15 flows through the opening portion 18. 4(a) to 4(c) show other embodiments of the rectifying member applied to the vacuum degassing apparatus of the present invention, and Fig. 4(a) shows a part of the rectifying member of the ninth embodiment. Fig. 4(b) is a partial cross-sectional perspective view showing the rectifying member of the tenth embodiment, and Fig. 4(c) is a partially sectional perspective view showing the rectifying member of the uth embodiment. The flow regulating member 20J shown in Fig. 4(a) has a tubular shape, and the tubular structure is shown in the rectifying member 2 of Fig. 2(a), and the lead-out portion is bent in such a manner as to face the opposite direction to the space 19. By. The rectifying member 20J shown in Fig. 4(a) has a partition space 19 and an inner surface 22J of the rectifying wall portion 21J of the opening portion 18 as a guide surface which is attached to the rectifying member 20J. The airflow that has flowed in from the opening portion 18 and the introduction portion 23J is introduced into the lead portion 24J. Similarly to the above-described embodiment, the flow regulating member 20K shown in Fig. 4(b) can suppress the turbulent airflow from the space 19 from blocking the upward flow of air flowing from the inflow-side connecting passage 15 through the opening portion 18. The rectifying member 20K shown in Fig. 4(b) has a guiding surface formed in a curved shape, and the guiding surface is formed in a rectifying wall shown in the rectifying member 20J of Fig. 4(a) The inner surface 22J of the portion 21J. The rectifying frame 34 201210965 20K shown in Fig. 4(b) has an inner surface 22κ of the rectifying wall portion 21K functioning as a guiding surface which is to be opened by the opening portion 18 in the rectifying member 20A. The airflow that has flowed into the introduction portion 23 is directed to the deriving portion 24 to induce the person. Similarly to the above-described embodiment, the rectifying member 20K shown in Fig. 4(b) can suppress the vortex flow from the space 19 from blocking the upward flow of air flowing from the inflow-side connecting passage i5 through the opening i8. Further, in the vacuum degassing apparatus of the present invention, the rectifying member 2GL' shown in Fig. 4(c) has a cylindrical (tubular) tube axis direction which is inclined in the vertical direction' and is derived The portion 2 4 L may be configured to open in a direction opposite to the space i 9 . The rectifying member 2A shown in Fig. 4(c) has an inner surface 22L of the rectifying wall portion 21L functioning as a guiding surface which is to be opened by the opening portion 18 in the rectifying member 20L. The airflow that has flowed in the introduction portion is induced to the lead portion 24L. By providing the flow regulating member 2A of the above-described structure in the opening portion 18 as shown in FIG. 4(c), it is possible to suppress the money flow from the space 阻碍9 from being blocked from the inflow-side connecting passage 15 through the opening portion 18. The updraft of the flow. In the vacuum degassing apparatus of the present invention, the flow of the gas formed above the ship glass G is not particularly limited as long as the retention of the gas component derived from the molten glass can be eliminated. The flow direction of the gas shown in the figure may be reversed, i.e., the gas flow from the downstream side of the subtraction bubble tank 3 toward the upstream side may be used. At this time, the connection passage Μ on the downstream side of the top of the vacuum degassing tank 3 is changed to the outflow side connection passage 'the outflow side connection passage _ is flowing from the gas environment control unit 16 to the vacuum degassing tank 3 The passage of the air flow; the connection passage 14 provided on the upstream side of the top of the decompression degassing tank 3 becomes the inflow side connection passage. The flow side connection passage flows from the vacuum degassing tank 3 to the gas environment control unit 16. The passage of the airflow. In the case where the flow direction of the air flow (circulation direction) 35 201210965 is opposite to the flow direction of the air flow F shown in Fig. 1, the opening is formed by the connection passage 14 and the gas environment control unit 16. The configuration of the aforementioned rectifying member may be provided around. In this case, the inflow-side connecting passage is provided on the inner side of the outer peripheral wall portion 16D of the gas-environment control unit 16, and the rectifying member is provided around the opening on the outlet side of the inflow-side connecting passage. The vortex airflow generated on the space side formed by the outer peripheral portion on the outer peripheral side wall portion 16D side of the gas environment control unit 16 prevents the upward flow of the inflow side connecting passage from being blocked. Further, in the vacuum degassing apparatus 100 shown in Fig. 1, the vacuum degassing tank 3 has a gas flow F in the same direction as the flow direction of the molten glass G as a whole in the entire longitudinal direction, but it can be eliminated. The gas component derived from the molten glass G can form a large amount of gas flow in the upper space of the molten glass G. The majority of the gas flow system may be the same as the flow direction of the molten glass G, or may be the opposite direction. Further, in the illustrated form, the positional relationship between the two connecting passages 14, 15 is the upstream side and the downstream side, but the positional relationship of the connecting passages is not limited thereto. For example, the positional relationship of the two connecting passages may be the relationship between the front side and the rear side of the drawing. In this case, the 'direction of the airflow flowing in the vacuum degassing tank 3 and the gas environment control unit 16' is perpendicular to the direction of the airflow F in the illustrated embodiment (in the gas environment control unit 16) The direction of the airflow is individually, the front and rear sides of the drawing 'or, the rear side and the front side of the drawing). In this case, the direction of the gas flow F in the vacuum degassing tank 3 is a direction perpendicular to the moving direction of the molten glass G. In the form shown in the figure, when the vacuum degassing tank 3 has a long shape in the moving direction of the molten glass G, the direction of the gas flow F above the molten glass G in the defoaming tank 3 in the decompression tank 3 201210965 is melted and melted. It is preferable that the moving direction of the glass G is the same direction or the opposite direction, and it is preferable to eliminate the retention of the gas component derived from the molten glass G, but the vacuum degassing tank has no significant length in the longitudinal and lateral directions. When the shape of the difference (for example, the shape of the vacuum degassing tank is square, hexagonal, octagonal, etc.), the direction of the gas flow F in the vacuum degassing tank 3 is in the direction of movement of the molten glass crucible. The direction perpendicular to the intersection and the retention of the gas component derived from the molten glass G can be eliminated. Further, in the vacuum degassing apparatus 100 of the present invention, when the gas is supplied by the gas supply means, the space can be controlled by the upper space of the molten glass G flowing in the degassing degassing tank 3 and the gas atmosphere. The airflow f of the portion 6 can eliminate the retention of the gas component derived from the glazed glass G. Therefore, in the vacuum degassing, the airflow F is not necessarily required to be generated in advance. As long as the retention of the gas component derived from the molten glass G can be eliminated, the gas flow F can be periodically generated during the vacuum degassing process. For example, the ratio of the gas flow F can be, for example, about 1 to 30 seconds per hour. The air flow F is generated. Further, in order to generate the airflow F periodically, the airflow ρ may be periodically supplied by the gas supply means (not shown). Further, the vacuum degassing apparatus of the present invention may have a configuration other than the above. For example, in order to form the air flow F ′ in the vicinity of the surface (liquid surface) of the glazing glass G, a baffle for inducing the air flow F to the lower side may be provided inside the top of the vacuum degassing tank 3. Next, the operation of the vacuum degassing apparatus 1 shown in Fig. 1 will be described. In the vacuum degassing apparatus 100, the inside of the vacuum degassing vessel 3 is maintained at a predetermined reduced pressure of atmospheric pressure at 37,2012, 965, and the molten glass G is supplied to the vacuum degassing tank 3. For example, the pressure degassing tank 3 is internally decompressed to 51 to 613 hPa (38 to 460 mmHg). The inside of the vacuum degassing tank 3 is preferably reduced to 80 to 338 hPa (60 to 253 mmHg). The glass G which is defoamed under reduced pressure by using the vacuum degassing apparatus 10 of the present embodiment is not limited as long as it is a glass produced by a heating and smelting method. Therefore, it is also a glass of soda-lime-silica glass represented by sodium about glass or an alkali glass of alkali-borosilicate glass. In the case of soda-lime glass used for flat glass for construction or vehicles, it is expressed by mass% based on oxide, and preferably has the following composition: Si02: 65 to 75%, Al2〇3: 0~ 3%, CaO: 5 to 15%, MgO: 0 to 15%, Na20: 10 to 20%, K20: 0 to 3%, Li20: 0 to 5%, Fe203: 0 to 3%, Ti02: 0 to 5 %, Ce02: 0 to 3%, BaO: 0 to 5%, SrO: 0 to 5%, B2〇3: 0 to 5%, ZnO: 0 to 5%, Zr02: 0 to 5%, Sn02: 0~ 3% and S03: 0~0. 3%. In the case of an alkali-free glass used for a substrate for a liquid crystal display, it is represented by mass% based on the oxide, and preferably has the following composition: Si02: 39 to 70%, Al2〇3: 3 to 25%, B2〇3 : 1 to 20%, MgO: 0 to 10%, CaO: 0 to 17%, SrO: 0 to 20%, and BaO: 0 to 30%. In the case of a mixed alkali glass used for a substrate for a plasma display, it is represented by mass% based on the oxide, and preferably has the following composition: SiO 2 : 50 to 75%, Al 2 〇 3 : 0 to 15 %, MgO + Ca〇 + SrO + BaO + ZnO : 6 to 24% and Na20 + K20 : 6 to 24%. 38 201210965 The manufacturing device for glass products related to the present invention is provided with the following devices. The calorimetric defoaming device 1 〇〇, the refining mechanism (smelting device), is disposed on the upstream side of the lower pressure degassing device 1 ' and melts the glass raw material to produce molten glass, and the forming mechanism (forming device) 2〇〇' is disposed on the downstream side of the vacuum degassing apparatus 100 and forms the molten glass; and the slow cooling mechanism (slow cooling device) 'slows the formed glass to be slowly cooled. Further, the melting mechanism, the forming mechanism, and the slow cooling mechanism are well known in the art. For example, in the melting mechanism, the glass raw material adjusted to the desired composition is put into the melting tank 'heated to about 1400~ according to a predetermined temperature of the glass type, such as soda lime glass for construction or vehicle use. The glass raw material was melted at 1600 tons to obtain a molten glass. For example, a molding apparatus such as a floating glass plate method, a fusion process, or a down-load method can be exemplified. In the above-mentioned manufacturing method, a high-quality glass plate having a wide thickness ranging from a thin plate glass to a thick plate glass can be produced in a large amount by a molding mechanism using a float bath for a floating glass plate method. And good. For example, in the slow cooling mechanism, a slow cooling furnace is generally used, and the slow cooling furnace is provided with a mechanism for slowly lowering the temperature of the formed glass. The mechanism for slowly lowering the temperature is to use a combustion gas or an electric heater to supply the controlled heat to the necessary position in the furnace to slowly cool the formed glass. Thereby, the residual stress in the formed glass can be removed. Next, a method of producing the glass article of the present invention will be described. Fig. 5 is a flow chart showing an embodiment of a method for producing a glass product of the present invention. 39 201210965 The method for producing a glass product of the present invention is characterized by using the above-described vacuum degassing apparatus 100. The method for producing a glass product of the present invention is, for example, a method for producing a glass product according to the following steps: a melting step K1, which is obtained by melting a molten glass raw material by a melting mechanism in a preceding stage of the vacuum degassing apparatus 100 described above. a molten glass; a defoaming step K2, which uses the above-mentioned vacuum degassing apparatus 1〇〇 to perform vacuum degassing of molten glass; and a forming step K 3 ' on the downstream side of the above-mentioned vacuum degassing apparatus i 〇〇 The molten glass is formed; the slow cooling step K4, which causes the molten glass to be slowly cooled in the subsequent step; and the cutting step K5, which cuts the slowly cooled glass to obtain a glass product K6. The method for producing a glass article of the present invention is in addition to the above-described vacuum degassing device 100, and is within the scope of the well-known techniques. Further, the apparatus used in the method for producing a glass product of the present invention is as described above. Fig. 5 shows the constituent elements of the method for producing a glass article of the present invention, i.e., the melting step, the forming step and the slow cooling step, and the cutting step which is used as needed, and other subsequent steps are also shown. EXAMPLES Hereinafter, the present invention will be specifically described based on examples, but the present invention is not limited thereto. In the embodiment, the thermal fluid analysis software FLUENT (Fluent) was used to carry out the analysis of the gas flow 40 in the upper space of the molten glass G in the vacuum degassing tank, and the flow was used in the pressure reduction. The upper space of the molten glass in the bubble tank and the gas flow in the gas environment control unit (the gas stream circulating in the present analysis) were eliminated; the retention of the gas components of the original and the self-glare glass was evaluated. Further, as a vacuum degassing apparatus, the vacuum degassing apparatus oob shown in Fig. 6 is a gas introduction point A from the opening of the connection passage 14 at the top of the upstream side of the vacuum degassing tank 3. (The height 屯 from the surface of the molten glass G is 38〇1〇1, and the upstream end of the vacuum degassing tank 3 is 0. 1m) 106 (TC A gas is supplied as a volume flow rate of 251^/111111 by an angle of 45 degrees from the upstream to the downstream. Further, the vacuum degassing apparatus B shown in Fig. 6 is Only the main parts in the vicinity of the vacuum degassing tank and the gas environment control unit used in the calculation mode of the simulation analysis are shown, and the same elements are assigned to the same elements as those shown in the second diagram. The dimensions of each part of the vacuum degassing apparatus 100B used are as follows. ” • Decompression degassing tank 3: Full length Ll = 10 m, height di == lm (cross section semicircular), upper space of molten glass G Height d3 = 〇. 5m . Rolling body environment control unit 16: full length L2 = llm, height (circle • connecting pipe ΜΑ, MA: full length 〇. 8m, inner diameter 〇. The 3 m (cylindrical) connecting pipe 14A is located at the upstream end portion Ο-lm from the decompression degassing tank 3, and at the upstream end portion of the gas environment control portion 16 at the position of the 〇6 claw. The connecting pipe 15A is located at the downstream end of the vacuum degassing tank. At the position of lm, the opening portion is such that the distance 〇1 from the inner wall of the side end portion of the gas environment control portion 16 is 〇 6 rn. 41 201210965 • Exhaust port 17 : Inner diameter 0. 05m. It is provided at the top of the center of the longitudinal direction of the gas environment control part 16. The pressure in the upper space of the molten glass G in the vacuum degassing tank 3 and the pressure in the gas environment control unit 16 of 350 mmHg, the temperature of the vacuum degassing tank 3 of 1400 ° C, and the gas atmosphere were analyzed. The temperature of the top portion 6A of the control unit 16 is 100 ° C, and the temperature of the bottom portion 16B of the gas environment control unit 16 is 200 ° C. The airflow analysis uses a transport mode of unreacted chemical species, a standard k-ε mode, and a standard wall function. The dynamics of the molten glass G in the inlet diffusion, the diffusion energy, and the degassing defoaming tank 3 are not considered, and other setting parameters use preset values. The fluid properties of the gas flow analysis were based on the values of the mixture of N2 and volatilized H20 in the FLUENT database (described below). • Viscosity: 1. 72xl0_5[kg/m-s] • Thermal conductivity: 〇. 〇454[W/m. K] • Mass diffusion coefficient: 2. 88xl (T5[m2/S] • Density: = pMw/RT (uncompressed ideal gas equation) • Specific heat: cp = Σ iYjCp, i (mass fractional average according to specific heat of chemical species) [J/kg_K] It is presumed that most of the gases such as S03, 02, b2o3, and H20 are volatilized from the molten glass G in the vacuum degassing tank 3, but it is assumed that only the surface of the H20 self-melting glass G is a volumetric flow rate of 14. 55NL/min is swung vertically upwards. (Embodiment) 42 201210965 As shown in Fig. 6 and Fig. 2(a), a thickness is set to be around the opening 18 of the connecting passage (inflow side connecting passage) 15 according to its own weight. A rectifying member 2〇 having a diameter of 0 mm and an inner diameter of 〇_3 m and a height (cylindrical shape). (Comparative Example) Simulation analysis was carried out under the same conditions as in the examples except that the flow regulating member was not provided. The airflow analysis results of the gas environment control unit 16 of the adjacent connection path 15 of the embodiment and the comparative example are shown in Figs. 7(a) and 7(b). Fig. 7(a) is a view showing the results of the analysis of the gas flow of the examples, and Fig. 7(b) is a view showing the results of the analysis of the gas flow of the comparative examples. As shown in Fig. 7(a), in the related embodiment of the present invention, the rectifying member 2 is provided around the opening 18 on the outlet side of the inflow-side connecting passage 15, and the inflow-side connecting passage 15 is opened from the inflow-side connecting passage 15 through the opening portion 18. The airflow S1 flowing into the gas environment control unit 16 is not blocked by the vortex airflow S2, and forms a stable airflow. On the other hand, in the comparative example shown in FIG. 7(b), the vortex flow S2 in the space from the outer peripheral portion blocks the flow of the inflow from the inflow-side connecting passage 15 through the opening 18 to the gas-environment control unit 16. & rise. Since the intensity of the full oxygen flow S2 varies depending on the intensity of the ascending air flow s 1 or the surrounding temperature environment, the flow of the ascending air flow in such a condition may become unstable, and it becomes a cause of the air flow F. According to the result, the vacuum degassing apparatus of the present invention provided with the rectifying member 20 is configured to circulate the airflow of the upper space of the molten glass and the gas control unit in the vacuum degassing tank. The flow rate is stabilized, and the retention of the gas component derived from the molten glass can be stabilized and eliminated, and the variation of the vacuum degassing performance can be suppressed, and the effect of degassing under reduced pressure is improved. 43 201210965 Fig. 8 In the examples and the comparative examples, the pressure in the upper space of the molten glass G in the vacuum degassing tank 3 is shown as a map from the position on the downstream side of the upstream side. In Fig. 8, The horizontal axis is a coordinate (normalized coordinate) from the position of the upstream end (upstream end) of the vacuum degassing tank to the entire length of the cockroach degassing tank 3, and the vertical axis is a comparative example. Melting in the decompression degassing tank 3 The pressure at the upstream end of the upper space of the molten glass G is such that it is a normalized pressure (normalized pressure). According to the result of Fig. 8, in the related embodiment of the present invention in which the rectifying member 20 is provided, the decompression decompression is performed. The pressure difference between the upstream end and the downstream end of the upper space of the molten glass G in the tank 3 is larger than that of the comparative example, and it is understood that the flow (circulation) state of the airflow in the upper space of the molten glass G is good. In contrast, in the comparative example, It is understood that the pressure difference between the upstream end and the downstream end of the upper space of the molten glass G in the vacuum degassing tank 3 is small, so that the flow (circulation) of the airflow in the upper space of the molten glass G is weak. It is presumed that this is due to the seventh (a). As shown in Fig. 7(b), in the comparative example of the non-rectifying member 2A, the upward flow of the airflow in the vicinity of the opening 18 of the inflow-side connecting passage 55 is hindered by the vortex flow from the space in the outer peripheral portion. On the other hand, as the flow velocity of the airflow near the opening portion 18 decreases, a part of the obstructed airflow flows back to the downstream end side of the vacuum degassing tank 3, and the downstream side of the vacuum degassing tank 3 is made. Molten glass G upper space The pressure rises. Fig. 9 shows the flow rate of the gas (upstream exhaust gas) discharged from the vacuum degassing tank 3 through the connection passage 14 to the gas environment control unit 16 in the examples and the comparative examples. The flow rate of the gas (downstream exhaust gas) discharged from the pressure degassing tank 3 to the gas atmosphere control unit 6 via the inflow side connection passage 15. In Fig. 9, the discharge flow rate of each gas is the downstream of the embodiment 44 201210965 The flow rate of the exhaust gas is normalized and displayed as 1. According to the results of Fig. 9, it is known that the flow of the upstream exhaust gas is negative in the related embodiment of the present invention in which the rectifying member 20 is provided, that is, the air flow is from the gaseous environment. The control unit 16 flows through the connection passage 14 to the decompression degassing tank 3, and the flow (circulation) state of the airflow is good. In contrast, in the comparative example, the flow rate of the upstream exhaust gas is positive, that is, the airflow is decompressed from the pressure. The bubble groove 3 flows through the connection passage 14 to the gas atmosphere control unit 16, and the flow rate of the gas flowing from the upstream side to the downstream side in the upper space of the molten glass G is reduced, and the flow of the gas flow (circulation) weak. According to the above results, the vacuum degassing apparatus of the present invention provided with the rectifying member is stabilized by the flow velocity of the upper portion of the molten glass flowing in the vacuum degassing tank and the gas control unit, and the source can be sourced. The retention of the gas component of the glazed glass is stabilized and eliminated, and the variation of the decompression and defoaming performance can be suppressed, and the effect of degassing under reduced pressure is enhanced. Industrial Applicability According to the vacuum degassing apparatus of the present invention, the effect of degassing under reduced pressure can be improved, and a high-quality glass product can be produced with good productivity. The vacuum degassing apparatus, the vacuum degassing method, the glass product manufacturing apparatus, and the glass product manufacturing method of the present invention can be used for building materials, vehicles, and liquid crystal display devices. Plasma display device. The manufacture of flat panel displays, optical, medical, and other wide range of glass products, such as organic electroluminescent display devices. In addition, the entire contents of the specification, the scope of the application, the drawings and the abstract of the Japanese Patent Application No. 2010-172230, filed on July 30, 2010, are hereby incorporated by reference. 45 201210965 [Brief Description of the Drawings] Fig. 1 is a structural view showing a schematic longitudinal cross-sectional structure of an example of a vacuum degassing apparatus according to the present invention, and a state in which a forming apparatus is connected to the apparatus. Fig. 2 is a view showing each embodiment of a flow regulating member applied to the vacuum degassing apparatus shown in Fig. 1; Fig. 2(a) is a partial cross-sectional perspective view showing the first embodiment; The figure shows a partial cross-sectional perspective view of the second embodiment; the second (c) shows a partial cross-sectional perspective view of the third embodiment; and the second (d) shows a partial cross section of the fourth embodiment. perspective. Fig. 3 is a view showing each embodiment of a flow regulating member applied to the vacuum degassing apparatus shown in Fig. 1; Fig. 3(a) is a partial perspective view showing a fifth embodiment; b) shows a partial cross-sectional perspective view of the sixth embodiment; FIG. 3(c) shows a partial cross-sectional perspective view of the seventh embodiment; and FIG. 3(d) shows a part of the eighth embodiment Sectional perspective. Fig. 4 is a view showing each embodiment of a flow regulating member applied to the vacuum degassing apparatus shown in Fig. 1; Fig. 4(a) is a partial sectional perspective view showing the ninth embodiment; The drawings show a partial cross-sectional perspective view of the tenth embodiment; and Fig. 4(c) shows a partial cross-sectional perspective view of the eleventh embodiment. Fig. 5 is a flow chart showing an example of the steps of the method for producing a glass article relating to the present invention. Figure 6 is a longitudinal cross-sectional view showing 46 of the simulated analysis used in the examples. 201210965 Vacuum degassing. Figure 7(a) shows the flow analysis results of the examples, and Figure 7(b) shows the results. A graph of the airflow analysis results of the non-comparative examples. Fig. 8 is a graph showing the pressure in the upper space of the molten glass in the vacuum degassing tanks of the examples and the comparative examples. Fig. 9 is a graph showing the flow rate and self-decompression of gas (upper private exhaust gas) discharged from the vacuum degassing tank to the gas environment control unit via the flow side connection passage, in the examples and comparative examples. The degassing tank is connected to the flow through the inflow side connecting passage in the gas of the ring (the lower gas). In the vacuum degassing apparatus of the prior art, the inflow side connecting passage is connected to the gas environment control unit, and when a space is formed in the outer periphery of the gas shutoff control unit, the space is connected to the flow side. The air flow pattern near the passage and the opening is displayed in a pattern. [Description of main component symbols] 1: refining tank 2... decompression chamber 2a... inlet port 2b on the bottom side of decompression chamber... outlet port 3 on the bottom side of decompression chamber... decompression degassing tank 3a...introduction α 3b ...lead outlet 5...riser tube 6...down tube 7···insulation material 8...outer tube 8a...outer tube 8 lower end 9...outer tube 9a...outer tube 9 lower end 11...conduit 12...upstream tank 13...downstream Slot 14···connection passage (outflow side connection passage) 14Α·__connection pipe (outflow side connection pipe) 15···connection passage (inflow side connection passage) 47 201210965 15 A...connection pipe (inflow side connection pipe) 16...gas environment control unit 16A...top portion 16B of the gas environment control unit·the bottom portion 16D of the gas environment control unit...the side wall portion 16a of the gas environment control unit...the gas environment control unit outer peripheral side wall 16b...the gas environment control unit Outer peripheral portion top portion 16c··Gas environment control unit outer peripheral portion bottom Π...exhaust port 18...opening portion 19...gas environment control unit outer peripheral space 20, 20B, 20C, 20D, 20E, 20F, 20G, 20H, 20J, 20K, 20L. . . Rectifying member 21 '21B'21C'21D'21E'21F ' 21G, 21H, 21J, 21K, 21L. " rectifying wall portion 22, 22J, 22K, 22L... rectifying wall inner side (guide surface) 23, 23B, 23C, 23D, 23G, 23H, 23J, 23K, 23L. ” Introduction Department 24, 24B, 24C, 24D, 24H, 24J, 24K, 24L·. - Derivation unit 100, 100B... Decompression defoaming device 200···Forming device F... Airflow G... Fused glass S1... Updraft S2... Rotating airflow K1-K6...Step 48