JP3746932B2 - Electrolyzed water generator - Google Patents

Description

【００１３】
また、前記陰極側の電解室では、次式（５）の反応が起きる。
【００１４】
【化２】

【００１５】
この結果、前記陽極側の電解室では塩素（Ｃｌ₂)及び次亜塩素酸（ＨＣｌＯ）を含む酸性の電解水が生成し、陰極側の電解室ではアルカリ性の電解水が生成する。各電解室は前記イオン透過性の隔膜により分離形成されているため、前記両電解水は相互に混合されることが無く、前記酸性の電解水は前記酸性電解水取出し手段により効率よく取出される。
【００１６】
ところで、前記式（２）、（３）に示すように、前記陽極側の電解室で生成する塩素は、その一部は該電解室で生成する電解液に溶解するが、他の一部は前記電解液に溶解することなく気体状となる。前記気体状の塩素は、前記酸性の電解水が前記酸性電解水取出し手段により前記陽極の電解室外に取出されると、外気中に放出されるので、通常は残留塩素として作用しない。
【００１７】
そこで、本発明の電解水生成装置は、前記希釈水供給手段を前記陽極側の電解室内の前記酸性電解水取出し手段の近傍に備え、該電解室で生成した酸性の電解水に希釈水を供給することにより、次式（６）に示すように、該電解室内で前記気体状の塩素の溶解を促進する。
【００１８】
【化３】

【００１９】
この結果、前記公報記載の従来技術のように前記電解室外で前記電解水に希釈水を供給する場合に比較して、同率の希釈率であれば、より残留塩素濃度の高い電解水を得ることができる。従って、より大きな殺菌効果を有する電解水を得ることができる。
【００２０】
また、同率の残留塩素濃度を有する電解水を得ようとすれば、前記従来技術よりも希釈率を高くすることができ、前記酸性の電解水の収率を高めることができる。
【００２１】
更に、本発明の電解水生成装置によれば、前記のようにして前記電解室内で前記気体状の塩素を前記生成した電解水に溶解せしめることにより、該電解水が該電解室の外に取り出されたときの塩素ガスの量を低減することができる。
【００２２】
前記希釈水供給手段は、前記陽極側の電解室内の前記酸性電解水取出し手段の近傍に備えられていることが必要である。前記希釈水供給手段を前記酸性電解水取出し手段から離れた、例えば電解室中央位置に備えると、該希釈水供給手段により供給される希釈水により電解途中の前記塩化物水溶液を希釈して、電解効率を低くするので好ましくない。
【００２３】
また、本発明の電解水生成装置において、前記被電解水供給手段は前記各電解室の底部から原水を供給すると共に、前記酸性電解水取出し手段は前記陽極側の電解室の上部から前記酸性の電解水を取出すことを特徴とする。前記気体状の塩素及び酸素は、前記陽極側の電解室内で気泡を生成し、電極等に付着する。そこで、前記被電解水供給手段により前記各電解室の底部から前記塩化物水溶液を供給すると共に、前記酸性電解水取出し手段により前記陽極側の電解室の上部から前記酸性の電解水を取出すことにより、前記陽極側の電解室内に底部から上部に向かう水流が形成される。また、前記電極等に付着した気体状の塩素及び酸素は該水流により移動せしめられて前記酸性電解水取出し手段近傍に集められ、該酸性電解水取出し手段近傍程、電極に多数付着した状態となる。
【００２４】
本発明の電解水生成装置では、前述のように前記酸性電解水取出し手段近傍に前記希釈水供給手段を備えるものであるので、前記酸性電解水取出し手段近傍に集められた前記気体状の塩素を前記希釈水供給手段から供給される希釈水で攪拌しながら効率よく溶解せしめることができる。この結果、同率の希釈率であれば更に残留塩素濃度が高い電解水を得ることができる。
【００２５】
また、前記陽極側の電解室では、前記式（１）に示すように酸素が発生し、その一部は気体状となって、気泡が前記塩素と同様に該電解室内で前記電極などに付着する。前記電極に前記塩素、酸素等の気泡が付着して該電極の表面が該気泡により被覆されると、該電極と前記塩化物水溶液との接触が阻害され、電解効率が低下する。
【００２６】
しかし、本発明の電解水生成装置では、前述のように前記電極に付着した前記塩素、酸素等の気泡は前記水流により前記電極に沿って上部へ移動し、該電極の上部程、多数付着した状態となる。そこで、本発明の電解水生成装置では、前記電極が前記陽極側の電解室において前記希釈水供給手段に臨む位置に備えられていることにより、該電極の上部に付着した前記塩素、酸素等の気泡を該希釈水供給手段から供給される希釈水による水流で攪拌することによって電極表面から除去することができる。この結果、更に電解効率を向上させることができ、また電極への電荷の局部的な集中が緩和されるため、電極の劣化を抑制して長寿命化を図ることができる。
【００２７】
本発明の電解水生成装置では、前記希釈水はどのような水であってもよいが、前記各電解室に供給されるものと同一の原水を用いることにより、構成を簡素化してコストを低減することができる。前記原水は、前記各電解室に供給される原水と別に前記希釈水供給手段に供給されてもよく、前記塩化物添加手段の上流側で分岐させて、前記希釈水供給手段に供給するようにしてもよい。
【００２８】
【発明の実施の形態】
次に、添付の図面を参照しながら本発明の実施の形態についてさらに詳しく説明する。図１は本実施形態の電解水生成装置のシステム構成図であり、図２は図１示の電解槽の縦断面図、図３は図２のＩＩＩ−ＩＩＩ線断面図である。また、図４は電解水生成装置における電解電流と生成した電解水に含まれる残留塩素濃度との関係について本実施形態と従来例との比較を示すグラフであり、図５は電解水生成装置における被電解水の流量当たりの電荷量と、生成した電解水のｐＨとの関係について本実施形態と従来例との比較を示すグラフであり、図６は同一濃度の残留塩素を含む電解水を得るために電解水生成装置において消費される電力について本実施形態と従来例との比較を示すヒストグラムである。
【００２９】
図１に示すように、本実施形態の電解水生成装置１において、電解槽２は対向配置された電極３，４の間にイオン透過性の隔膜５を備え、隔膜５により２つの電解室６，７が分離形成された構成となっている。電極３，４は、メッシュ状のチタン電極に白金及びイリジウム酸化物を主とする電解触媒（日本カーリット社製）が担持されたもので、電源装置８に接続されて例えば電極３が陽極、電極４が陰極とされている。
【００３０】
各電解室６，７の底部には塩化ナトリウム水溶液供給導管９，１０が接続されている。塩化ナトリウム水溶液供給導管９，１０は原水導管１１、電磁弁１２、減圧弁１３を介して図示しない水道管等に接続され、濃塩化ナトリウム水溶液タンク１４からメータリングポンプ１５により供給される濃塩化ナトリウム水溶液が原水導管１１内で原水と混合されて調製される所定濃度の塩化ナトリウム水溶液が塩化ナトリウム水溶液供給導管９，１０から各電解室６，７に供給されるようになっている。尚、原水導管１１にはフローセンサ１１ａが備えられ、塩化ナトリウム水溶液供給導管９，１０にはそれぞれ流量調整弁９ａ、１０ａが備えられている。
【００３１】
また、各電解室６，７で前記塩化ナトリウム水溶液の電解により生成する酸性またはアルカリ性の電解水は、各電解室６，７の上部に接続された電解水取出導管１６，１７により取り出され、三方弁１８，１９により酸性の電解水は酸性電解水取出導管２０から、アルカリ性の電解水はアルカリ性電解水取出導管２１から取り出されるようになっている。
【００３２】
各電解室６，７の上部には、電解水取出導管１６，１７の近傍に希釈水導管２２，２３が接続されており、希釈水導管２２，２３はバイパス導管２４、電磁弁２５、減圧弁２６を介して、濃塩化ナトリウム水溶液タンク１４の上流側で原水導管１１に接続されている。尚、希釈水導管２２，２３にはそれぞれ流量調整弁２２ａ、２３ａ、フローセンサ２２ｂ、２３ｂが備えられている。
【００３３】
電解水生成装置１では、電極３，４の極性を前記のまま固定しておくと、陰極側の電極４に炭酸カルシウム、炭酸マグネシウム等の塩基性化合物の析出物からなるスケールが付着して次第に電解効率が低減する。そこで、電解水生成装置１では、これを防止するために、制御手段２７により電極３，４の極性を周期的に交互に切り換えるようになっている。また、電極３，４の極性を切替えると各電解室６，７で生成する電解水の液性も切替るので、制御手段２７は電極３，４の極性切り換えに対応して三方弁１８，１９の接続方向を切替る制御を行う。
【００３４】
例えば、制御手段２７により電極３を陽極、電極４を陰極として電解を行うときには、三方弁１８により電解水取出導管１６と酸性電解水取出導管２０とを接続するとともに、三方弁１９により電解水取出導管１７とアルカリ性電解水取出導管２１とを接続する。この場合には、電解室６が陽極側となるので電解室６で酸性の電解水が生成し、陰極側となる電解室７にはアルカリ性の電解水が生成する。そして、電解室６で生成した酸性の電解水は酸性電解水取出導管２０から、電解室７で生成したアルカリ性の電解水は同様にアルカリ性電解水取出導管２１から取り出される。
【００３５】
次に、図２及び図３を参照して電解槽２の構成について説明する。
【００３６】
電解槽２は、内部に電解室６，７を形成する空洞部３１，３２を備えるハウジング３３，３４が、空洞部３１，３２が間にイオン透過性の隔膜５を挟んで対向するように組み合わされた構成を備える。ハウジング３３，３４は、図３にハウジング３３を例として示すように略長方形状であり、底部に空洞部３１，３２に連通する塩化ナトリウム水溶液導入部３５，３６、上部に空洞部３１，３２に連通する電解水取出部３７，３８が設けられている。塩化ナトリウム水溶液導入部３５，３６には、その一方の端部に、図１示の塩化ナトリウム水溶液供給導管９，１０が接続される塩化ナトリウム水溶液供給導管接続部３９，４０が設けられている。また、電解水取出部３７，３８には、塩化ナトリウム水溶液供給導管接続部３９，４０に対してハウジング３３，３４の対角線上反対側の端部に、図１示の電解水取出導管１６，１７が接続される電解水取出導管接続部４１，４２が設けられ、電解水取出導管接続部４１，４２の反対側の端部には図１示の希釈水供給導管２２，２３が接続される希釈水供給導管接続部４３，４４が設けられている。尚、図２では、電解水取出導管接続部４１，４２は希釈水供給導管接続部４３，４４の陰に隠れている。
【００３７】
塩化ナトリウム水溶液導入部３５，３６と電解水取出部３７，３８とは、空洞部３１，３２の内面に垂直方向に沿って形成された複数の細い通液路４５，４６により連通されており、通液路４５，４６上にメッシュ状の電極３（図３に仮想線示する），４（図示せず）が設けられている。電極３，４はハウジング３３，３４を貫通して設けられた電極端子４７，４８に支持されており、電極３，４の上端は電解水取出部３７，３８内で希釈水供給導管接続部４３，４４に臨んで設けられている。電極端子４７，４８はハウジング３３，３４の外部で図１示の電源装置８に接続されている。
【００３８】
尚、ハウジング３３，３４は図３示の複数のねじ孔４９，５０に挿通されるボルト（図示せず）により相互に螺着して組み合わせられる。
【００３９】
次に、図１乃至図３に示す本実施形態の電解水生成装置１の作動について説明する。
【００４０】
本実施形態の電解水生成装置１では原水として通常の水道水を使用しており、まず、メータリングポンプ１５により濃塩化ナトリウム水溶液タンク１４から濃塩化ナトリウム水溶液を原水導管１１に供給し、例えば０．０２５〜０．０５モル／リットル（１．４６〜２．９３ｇ／リットル）の範囲の濃度の塩化ナトリウム水溶液を調製し、該塩化ナトリウム水溶液を塩化ナトリウム水溶液供給導管９，１０から各電解室６，７の塩化ナトリウム水溶液導入部３５，３６に供給する。塩化ナトリウム水溶液導入部３５，３６に導入された塩化ナトリウム水溶液は、通液路４５，４６により電解水取出部３７，３８に至り、電解水取出導管１６，１７から取出される。
【００４１】
次に、制御手段２７により、例えば、電極３を陽極、電極４を陰極として電解を行うと、陽極側の電解室６では前記式（１）〜（４）示の反応が起き、有効残留塩素を含む酸性の電解水が生成し、陰極側の電解室７では前記式（５）示の反応が起きてアルカリ性の電解水が生成する。このとき、電解水取出部３７，３８には、電解水取出導管接続部４１，４２が設けられている端部と反対側の端部に設けられている希釈水供給導管接続部４３，４４に接続されている希釈水供給導管２２，２３から、塩化ナトリウムを含まない原水が希釈水として供給される。前記希釈水は、例えば塩化ナトリウム水溶液供給導管９，１０から供給される塩化ナトリウム水溶液と略同等量（１：１）で供給され、この結果前記倍率で希釈された電解水が得られる。
【００４２】
前記電解時に、陽極側の電解室６では前記反応に伴って気体状の塩素及び酸素が生成し、該塩素及び酸素が気泡を形成して電極３に付着する。一方、塩化ナトリウム水溶液導入部３５に導入された塩化ナトリウム水溶液は、通液路４５に沿って電解水取出部３７に至るゆるやかな水流を形成するので、前記塩素及び酸素の気泡は該水流により電極３の表面に沿って移動し、電解水取出部３７内で希釈水供給導管接続部４３に臨んで設けられている電極３の上端に集められ、電極３の上端部程、多数付着した状態を形成する。そして、電極３の上端に集められた前記塩素及び酸素の気泡は、この部分に直接供給される前記希釈水による新たな水流によって攪拌され、溶解が促進される。
【００４３】
この結果、電極室６から取出される酸性の電解水に含まれる残留塩素濃度が高くなると共に、前記塩素及び酸素の気泡が電極３の表面から除去されることにより電解効率が向上する。
【００４４】
このとき、希釈水供給導管２２は、電解水取出部３７内で電解水取出導管接続部４１が設けられている端部と反対側の端部に設けられている希釈水供給導管接続部４３に接続されている。従って、希釈水供給導管２２から供給された希釈水が希釈水供給導管接続部４３側から電解水取出導管接続部４１方向に流れる間に、前記塩素及び酸素の気泡を攪拌しながら効率よく溶解を促進することができる。
【００４５】
また、希釈水供給導管接続部４３はオリフィスを備えていてもよい。前記希釈水は、前記オリフィスを介して電解水取出部３７内に供給される結果、流速が増大し、前記塩素及び酸素の気泡を巻き込んで流れるので、前記塩素及び酸素の気泡をさらに効率よい溶解を促進することができる。
【００４６】
また、前記電解時に、陰極側の電解室７では前記反応に伴って気体状の水素が生成し、該水素が気泡を形成して電極４に付着する。しかし、この水素の気泡は陽極側の電解室６の場合と同様に、塩化ナトリウム水溶液導入部３６に導入され通液路４６に沿って電解水取出部３８に至るゆるやかな塩化ナトリウム水溶液の水流により電極４の上端に集められ、電極４の上端部程、多数付着した状態を形成する。そして、希釈水供給導管２４からこの部分に供給される希釈水による新たな水流によって、電極４の表面から気泡を除去することができる。従って、陰極側の電解室７においても電解効率が向上する。
【００４７】
次に、電解室６で得られた酸性の電解水は、電解水取出導管接続部４１に接続されている電解水取出導管１６により電解室６から取出される。このとき、制御装置２７は、電極３を陽極、電極４を陰極とする設定に対応して、三方弁１８により電解水取出導管１６と酸性電解水取出導管２０とを接続するとともに、三方弁１９により電解水取出導管１７とアルカリ性電解水取出導管２１とを接続している。従って、前記酸性の電解水が酸性電解水取出導管２０から取出される。
【００４８】
次に、本実施形態の電解水生成装置１及び従来の電解水生成装置において、電極３，４に通じる電解電流を変えて、電解電流と、電解室６で得られた酸性の電解水に含まれる残留塩素濃度との関係を比較した。前記従来の電解水生成装置は、図１示の本実施形態の電解水生成装置１において、希釈水供給導管２２，２３をそれぞれ電解水取出導管１６，１７に接続し、電解槽２の外部で希釈水を供給するようにした以外は電解水生成装置１と全く同一の構成である。塩化ナトリウム水溶液の濃度、供給量及び希釈水の供給量は、本実施形態の電解水生成装置１、従来の電解水生成装置とも全く同一条件である。結果を図４に示す。
【００４９】
図４から、本実施形態の電解水生成装置１によれば、電解室６で得られた酸性の電解水に含まれる残留塩素濃度は、電解電流の大きさに関らず、従来の電解水生成装置よりも高くなることが明らかである。これは、本実施形態の電解水生成装置１は、希釈率が同一であれば、従来の電解水生成装置より高濃度の残留塩素を含む電解水を得ることができることを示している。
【００５０】
また、図４の結果は、本実施形態の電解水生成装置１によれば、同一濃度の残留塩素を含む電解水を得ようとすれば、従来の電解水生成装置よりも希釈率を高くして、前記酸性の電解水の収率を高めることができることを示している。
【００５１】
次に、本実施形態の電解水生成装置１及び従来の電解水生成装置において、電解室６，７に供給される塩化ナトリウム水溶液の流量に対し該塩化ナトリウム水溶液に付与される電荷量の比と、電解室６で生成した酸性の電解水のｐＨとの関係を比較した。結果を図５に示す。尚、図５では塩化ナトリウム水溶液の流量（Ｑ）に対する該塩化ナトリウム水溶液に付与される電荷量（Ｉ）の比をＩ／Ｑの対数で示している。
【００５２】
図５から、本実施形態の電解水生成装置１によれば、電解室６で得られた酸性の電解水のｐＨは、Ｉ／Ｑの値の大きさに関らず、従来の電解水生成装置よりも低くなることが明らかである。これは、本実施形態の電解水生成装置１では、前記式（１）、（４）で示される反応におけるプロトン（Ｈ⁺）の生成効率が、従来の電解水生成装置よりも高く、電解効率が向上されていることを示している。
【００５３】
次に、本実施形態の電解水生成装置１及び従来の電解水生成装置において、３０ｐｐｍの残留塩素を含む電解水を得るために電解水生成装置において消費される電力を比較した。結果を図６に示す。
【００５４】
図６から、本実施形態の電解水生成装置１によれば、従来の電解水生成装置に比較して消費電力が少なく、電解効率が向上されていることが明らかである。
【００５５】
前記実施形態では、制御装置２７により電極３を陽極、電極４を陰極に設定する場合を例として説明している。しかし、本実施形態の電解水生成装置１は、制御装置２７により電極３，４の極性が切替えられ、電極３が陰極、電極４が陽極となった場合についても、電極３，４の極性及び電解室６，７で生成する電解水の液性が逆転する以外は前記実施形態と全く同一に作動する。
【００５６】
尚、この場合、制御手段２７は電極３を陰極、電極４を陽極とする設定に対応して、三方弁１８により電解水取出導管１７と酸性電解水取出導管２０とを接続するとともに、三方弁１９により電解水取出導管１６とアルカリ性電解水取出導管２１とを接続する。従って、前記酸性の電解水が酸性電解水取出導管２０から取出されることに変わりはない。
【００５７】
また、前記実施形態では、原水に塩化ナトリウムを添加する場合を示しているが、塩化ナトリウムに替えて塩化カリウム等他の塩化物を用いるようにしてもよい。
【図面の簡単な説明】
【図１】本発明の電解水生成装置の一例を示すシステム構成図。
【図２】図１示の電解槽の縦断面図。
【図３】図２のＩＩＩ−ＩＩＩ線断面図。
【図４】電解水生成装置における電解電流と生成した電解水に含まれる残留塩素濃度との関係について図１示の実施形態と従来例との比較を示すグラフ。
【図５】電解水生成装置における被電解水の流量当たりの電荷量と、生成した電解水のｐＨとの関係について図１示の実施形態と従来例との比較を示すグラフ。
【図６】同一濃度の残留塩素を含む電解水を得るために電解水生成装置において消費される電力について図１示の実施形態と従来例との比較を示すヒストグラム。
【符号の説明】
１…電解水生成装置、 ２…電解槽、 ３，４…電極、 ５…イオン透過性の隔膜、 ６，７…電解室、 ９，１０…被電解水供給手段、 １４，１５…塩化物添加手段、 １６，１７，２０…酸性電解水取出し手段、 ２２，２３…希釈水供給手段。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrolyzed water generating device that generates electrolyzed water having a bactericidal effect.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an electrolyzed water generating apparatus is known that includes an ion-permeable diaphragm between a pair of electrodes arranged opposite to each other and an electrolytic cell that is separated and formed into two electrolysis chambers by the diaphragm. In the electrolyzed water generating device, an aqueous solution containing a chloride such as sodium chloride is supplied to each electrolytic chamber, and the aqueous chloride solution is electrolyzed through a predetermined current between both electrodes, so that chlorine from the electrolytic chamber on the anode side can be obtained. Acidic electrolyzed water containing effective residual chlorine such as hypochlorous acid is obtained. The acidic electrolyzed water is used for sterilization and disinfection of tableware, food, tap water, etc. due to the sterilization effect mainly composed of the residual chlorine. In addition, since the bactericidal effect mainly composed of residual chlorine is effective against phytopathogenic bacteria, the acidic electrolyzed water can also be used for sterilization and disinfection of plants, soil and the like.
[0003]
By the way, when the acidic electrolyzed water is sprayed on a field or the like to be used for sterilization or disinfection of the plant, soil or the like, a considerable amount is required. However, if a large amount of electrolyzed water is generated at once by the electrolyzed water generating device, there is a problem that the device must be enlarged. Further, it is conceivable that acidic electrolyzed water is generated little by little with a small device and the electrolyzed water is stored, but there is a problem that the sterilizing effect is reduced while the electrolyzed water is stored. .
[0004]
In order to solve the above problem, for example, Japanese Patent Publication No. 4-42077 discloses that a sodium chloride aqueous solution obtained by adding sodium chloride to raw water is electrolyzed in the electrolytic cell, and effective residual chlorine is discharged from the electrolytic chamber on the anode side. A technique has been proposed in which acidic electrolyzed water containing water is obtained and raw water is added to the electrolyzed water outside the electrolysis chamber for dilution. According to the technique described in the publication, the residual chlorine concentration or pH value can be arbitrarily adjusted by diluting the acidic electrolyzed water obtained from the electrolytic chamber on the anode side with the raw water, and the acidic It is said that the yield of electrolyzed water can be increased.
[0005]
However, since the technique described in the publication is to dilute the acidic electrolyzed water taken out from the electrolytic chamber on the anode side by adding the raw water outside the electrolyzed chamber, the electrolyzed water taken out from the electrolyzed chamber The residual chlorine concentration contained in can only be determined by a predetermined dilution factor. Further, in the technique described in the above publication, the yield of electrolyzed water cannot be increased beyond that determined by the dilution ratio when the residual chlorine concentration contained in the electrolyzed water taken out from the electrolysis chamber is diluted to a desired concentration. .
[0006]
[Problems to be solved by the invention]
In view of such circumstances, in the present invention, when diluting acidic electrolyzed water obtained from the electrolysis chamber on the anode side, the residual chlorine concentration contained in the electrolyzed water may be made higher than the concentration determined by a predetermined dilution factor. An object of the present invention is to provide an electrolyzed water generating device that can be used.
[0007]
In addition, the object of the present invention is to obtain electrolyzed water having a desired concentration even when the electrolyzed water taken out from the electrolyzed chamber is diluted to a desired concentration outside the electrolyzed chamber at a dilution ratio higher than that. Another object is to provide an electrolyzed water generating device capable of increasing the yield of the electrolyzed water.
[0008]
Furthermore, the objective of this invention is also providing the electrolyzed water generating apparatus which can improve electrolysis efficiency.
[0009]
[Means for Solving the Problems]
In order to achieve such an object, an electrolyzed water generating apparatus of the present invention comprises an electrolytic cell comprising an ion-permeable diaphragm between a pair of opposed electrodes, and separated into two electrolysis chambers by the diaphragm. A chloride addition means for preparing a chloride aqueous solution by adding chloride to the raw water supplied to each electrolysis chamber; an electrolyzed water supply means for supplying the chloride aqueous solution to each electrolysis chamber as electrolyzed water; In an electrolyzed water generating device comprising an acidic electrolyzed water extraction means for extracting acidic electrolyzed water containing chlorine from an electrolytic chamber on the anode side, an electrolysis generated at least in the vicinity of the acidic electrolyzed water extracting means in the electrolytic chamber on the anode side Dilution water supply means for supplying dilution water for diluting water is provided.
[0010]
In the electrolytic generation apparatus of the present invention, a chloride aqueous solution prepared by adding chloride such as sodium chloride to raw water by the chloride addition means is supplied to each electrolytic chamber of the electrolytic cell by the electrolyzed water supply means. Supplied. Next, in the electrolytic cell, the chloride aqueous solution supplied to each electrolytic chamber is electrolyzed by passing a predetermined current between the pair of electrodes.
[0011]
In the electrolysis, reactions of the following formulas (1) to (4) occur in the electrolytic chamber on the anode side.
[0012]
[Chemical 1]

[0013]
In the electrolysis chamber on the cathode side, the reaction of the following formula (5) occurs.
[0014]
[Chemical formula 2]

[0015]
As a result, acidic electrolytic water containing chlorine (Cl ₂ ) and hypochlorous acid (HClO) is generated in the electrolytic chamber on the anode side, and alkaline electrolytic water is generated in the electrolytic chamber on the cathode side. Since each electrolytic chamber is separated and formed by the ion-permeable diaphragm, the two electrolyzed waters are not mixed with each other, and the acidic electrolyzed water is efficiently taken out by the acidic electrolyzed water take-out means. .
[0016]
By the way, as shown in the above formulas (2) and (3), a part of the chlorine generated in the electrolytic chamber on the anode side is dissolved in the electrolytic solution generated in the electrolytic chamber, while the other part is It becomes gaseous without dissolving in the electrolyte. The gaseous chlorine does not normally act as residual chlorine because the acidic electrolyzed water is released into the outside air when the acidic electrolyzed water is taken out of the anode electrolysis chamber by the acidic electrolyzed water take-out means.
[0017]
Therefore, the electrolyzed water generating apparatus of the present invention is provided with the dilution water supply means in the vicinity of the acidic electrolyzed water take-out means in the electrolytic chamber on the anode side, and supplies dilution water to the acidic electrolyzed water generated in the electrolysis chamber. By doing so, as shown to following Formula (6), melt | dissolution of the said gaseous chlorine is accelerated | stimulated in this electrolytic chamber.
[0018]
[Chemical 3]

[0019]
As a result, compared to the case where dilution water is supplied to the electrolyzed water outside the electrolysis chamber as in the prior art described in the publication, it is possible to obtain electrolyzed water having a higher residual chlorine concentration if the dilution rate is the same. Can do. Therefore, electrolyzed water having a greater sterilizing effect can be obtained.
[0020]
Moreover, if it is going to obtain the electrolyzed water which has the residual chlorine density | concentration of the same rate, a dilution rate can be made higher than the said prior art and the yield of the said acidic electrolyzed water can be raised.
[0021]
Furthermore, according to the electrolyzed water generating apparatus of the present invention, the electrolyzed water is taken out of the electrolyzed chamber by dissolving the gaseous chlorine in the electrolyzed chamber as described above. The amount of chlorine gas can be reduced.
[0022]
The dilution water supply means needs to be provided in the vicinity of the acidic electrolyzed water extraction means in the electrolytic chamber on the anode side. When the diluting water supply means is provided away from the acidic electrolyzed water take-out means, for example, at the center of the electrolysis chamber, the chloride aqueous solution in the middle of electrolysis is diluted with diluting water supplied by the diluting water supply means. Since efficiency is lowered, it is not preferable.
[0023]
In the electrolyzed water generating apparatus of the present invention, the electrolyzed water supply means supplies raw water from the bottom of each electrolysis chamber, and the acidic electrolyzed water take-out means is from the top of the electrolysis chamber on the anode side. It is characterized by taking out electrolyzed water. The gaseous chlorine and oxygen generate bubbles in the electrolytic chamber on the anode side and adhere to electrodes and the like. Therefore, by supplying the aqueous chloride solution from the bottom of each electrolysis chamber by the electrolyzed water supply means, and by taking out the acidic electrolyzed water from the top of the electrolysis chamber on the anode side by the acidic electrolyzed water extraction means A water flow from the bottom to the top is formed in the electrolytic chamber on the anode side. Further, gaseous chlorine and oxygen adhering to the electrode or the like are moved by the water flow and collected in the vicinity of the acidic electrolyzed water extraction means, and a larger number of adhering to the electrode is in the vicinity of the acidic electrolyzed water extraction means. .
[0024]
In the electrolyzed water generating apparatus of the present invention, the diluting water supply means is provided in the vicinity of the acidic electrolyzed water extraction means as described above, and thus the gaseous chlorine collected in the vicinity of the acidic electrolyzed water extraction means is removed. It can be dissolved efficiently while stirring with dilution water supplied from the dilution water supply means. As a result, if the dilution rate is the same, electrolyzed water having a higher residual chlorine concentration can be obtained.
[0025]
Further, in the electrolytic chamber on the anode side, oxygen is generated as shown in the formula (1), part of which is gaseous, and bubbles are attached to the electrodes and the like in the electrolytic chamber in the same manner as the chlorine. To do. When bubbles such as chlorine and oxygen adhere to the electrode and the surface of the electrode is covered with the bubbles, the contact between the electrode and the aqueous chloride solution is hindered, and the electrolysis efficiency decreases.
[0026]
However, in the electrolyzed water generating apparatus of the present invention, as described above, the bubbles such as chlorine and oxygen adhering to the electrode move upward along the electrode due to the water flow, and a larger number of the air bubbles adhere to the upper part of the electrode. It becomes a state. Therefore, in the electrolyzed water generating apparatus of the present invention, the electrode is provided at a position facing the dilution water supply means in the electrolysis chamber on the anode side, so that the chlorine, oxygen, etc. attached to the upper part of the electrode The bubbles can be removed from the surface of the electrode by stirring with a flow of dilution water supplied from the dilution water supply means. As a result, the electrolysis efficiency can be further improved, and the local concentration of electric charges on the electrode is alleviated, so that the deterioration of the electrode can be suppressed and the life can be extended.
[0027]
In the electrolyzed water generating apparatus of the present invention, the dilution water may be any water, but by using the same raw water that is supplied to each electrolysis chamber, the configuration is simplified and the cost is reduced. can do. The raw water may be supplied to the dilution water supply means separately from the raw water supplied to each electrolysis chamber, and may be branched upstream of the chloride addition means and supplied to the dilution water supply means. May be.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is a system configuration diagram of the electrolyzed water generating apparatus of the present embodiment, FIG. 2 is a longitudinal sectional view of the electrolytic cell shown in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 4 is a graph showing a comparison between the present embodiment and the conventional example regarding the relationship between the electrolysis current in the electrolyzed water generating device and the residual chlorine concentration contained in the generated electrolyzed water, and FIG. FIG. 6 is a graph showing a comparison between this embodiment and a conventional example regarding the relationship between the amount of charge per flow rate of electrolyzed water and the pH of the generated electrolyzed water, and FIG. 6 provides electrolyzed water containing residual chlorine of the same concentration. It is a histogram which shows the comparison with this embodiment and a prior art example about the electric power consumed in an electrolyzed water generating apparatus.
[0029]
As shown in FIG. 1, in the electrolyzed water generating apparatus 1 of the present embodiment, the electrolytic cell 2 includes an ion permeable diaphragm 5 between the electrodes 3 and 4 arranged to face each other, and the two electrolytic chambers 6 are separated by the diaphragm 5. , 7 are formed separately. The electrodes 3 and 4 are made by carrying an electrocatalyst (manufactured by Nippon Carlit Co., Ltd.) mainly composed of platinum and iridium oxide on a mesh-like titanium electrode. 4 is a cathode.
[0030]
Sodium chloride aqueous solution supply conduits 9 and 10 are connected to the bottoms of the electrolysis chambers 6 and 7, respectively. The sodium chloride aqueous solution supply conduits 9 and 10 are connected to a water pipe (not shown) via the raw water conduit 11, the electromagnetic valve 12, and the pressure reducing valve 13, and are supplied from the concentrated sodium chloride aqueous solution tank 14 by the metering pump 15. A sodium chloride aqueous solution having a predetermined concentration prepared by mixing the aqueous solution with the raw water in the raw water conduit 11 is supplied to the electrolytic chambers 6 and 7 from the sodium chloride aqueous solution supply conduits 9 and 10. The raw water conduit 11 is provided with a flow sensor 11a, and the sodium chloride aqueous solution supply conduits 9 and 10 are provided with flow control valves 9a and 10a, respectively.
[0031]
In addition, the acidic or alkaline electrolyzed water generated by electrolysis of the sodium chloride aqueous solution in each electrolysis chamber 6, 7 is taken out by electrolyzed water extraction conduits 16, 17 connected to the top of each electrolysis chamber 6, 7, and The acidic electrolyzed water is taken out from the acidic electrolyzed water outlet conduit 20 and the alkaline electrolyzed water is taken out from the alkaline electrolyzed water outlet conduit 21 by the valves 18 and 19.
[0032]
Dilution water conduits 22 and 23 are connected to the upper portions of the electrolysis chambers 6 and 7 in the vicinity of the electrolysis water extraction conduits 16 and 17, respectively. The dilution water conduits 22 and 23 are a bypass conduit 24, an electromagnetic valve 25, and a pressure reducing valve. 26 is connected to the raw water conduit 11 upstream of the concentrated sodium chloride aqueous solution tank 14. The dilution water conduits 22 and 23 are provided with flow rate adjusting valves 22a and 23a and flow sensors 22b and 23b, respectively.
[0033]
In the electrolyzed water generating apparatus 1, when the polarities of the electrodes 3 and 4 are fixed as described above, a scale composed of precipitates of basic compounds such as calcium carbonate and magnesium carbonate is gradually attached to the electrode 4 on the cathode side. Electrolytic efficiency is reduced. Therefore, in the electrolyzed water generating apparatus 1, in order to prevent this, the polarity of the electrodes 3 and 4 is switched alternately and periodically by the control means 27. Further, when the polarity of the electrodes 3 and 4 is switched, the liquidity of the electrolyzed water generated in each of the electrolysis chambers 6 and 7 is also switched, so that the control means 27 corresponds to the polarity switching of the electrodes 3 and 4 and the three-way valves 18 and 19. Control is performed to switch the connection direction.
[0034]
For example, when the electrolysis is performed with the electrode 3 as the anode and the electrode 4 as the cathode by the control means 27, the electrolyzed water outlet conduit 16 and the acidic electrolyzed water outlet conduit 20 are connected by the three-way valve 18, and the electrolyzed water outlet is discharged by the three-way valve 19. The conduit 17 and the alkaline electrolyzed water extraction conduit 21 are connected. In this case, since the electrolysis chamber 6 is on the anode side, acidic electrolyzed water is generated in the electrolysis chamber 6, and alkaline electrolyzed water is generated in the electrolysis chamber 7 on the cathode side. And the acidic electrolyzed water produced | generated in the electrolysis chamber 6 is taken out from the acidic electrolyzed water extraction conduit | pipe 20, and the alkaline electrolyzed water produced | generated in the electrolysis chamber 7 is similarly taken out from the alkaline electrolyzed water extraction conduit | pipe 21. FIG.
[0035]
Next, the structure of the electrolytic cell 2 is demonstrated with reference to FIG.2 and FIG.3.
[0036]
The electrolytic cell 2 is a combination of housings 33 and 34 having cavities 31 and 32 that form electrolytic chambers 6 and 7 in the interior so that the cavities 31 and 32 face each other with an ion-permeable diaphragm 5 interposed therebetween. The structure is provided. The housings 33 and 34 have a substantially rectangular shape as shown in FIG. 3 as an example. The sodium chloride aqueous solution introduction portions 35 and 36 communicated with the hollow portions 31 and 32 at the bottom and the hollow portions 31 and 32 at the top. Electrolyzed water extraction portions 37 and 38 that communicate with each other are provided. The sodium chloride aqueous solution introduction portions 35 and 36 are provided with sodium chloride aqueous solution supply conduit connection portions 39 and 40 to which the sodium chloride aqueous solution supply conduits 9 and 10 shown in FIG. Further, the electrolyzed water outlets 37 and 38 are connected to the ends of the housings 33 and 34 on the diagonally opposite side with respect to the sodium chloride aqueous solution supply conduit connecting parts 39 and 40, respectively. 1 is provided, and the dilution water supply conduits 22 and 23 shown in FIG. 1 are connected to the opposite ends of the electrolytic water extraction conduit connections 41 and 42, respectively. Water supply conduit connections 43, 44 are provided. In FIG. 2, the electrolyzed water extraction conduit connection portions 41 and 42 are hidden behind the dilution water supply conduit connection portions 43 and 44.
[0037]
The sodium chloride aqueous solution introduction parts 35 and 36 and the electrolyzed water extraction parts 37 and 38 are communicated with each other by a plurality of thin liquid passages 45 and 46 formed along the vertical direction on the inner surfaces of the cavity parts 31 and 32. Mesh-like electrodes 3 (shown in phantom lines in FIG. 3) and 4 (not shown) are provided on the liquid passages 45 and 46. The electrodes 3, 4 are supported by electrode terminals 47, 48 provided through the housings 33, 34, and the upper ends of the electrodes 3, 4 are in the electrolytic water outlets 37, 38 and the dilution water supply conduit connection part 43. , 44 is provided. The electrode terminals 47 and 48 are connected to the power supply device 8 shown in FIG. 1 outside the housings 33 and 34.
[0038]
The housings 33 and 34 are assembled by being screwed together by bolts (not shown) inserted through the plurality of screw holes 49 and 50 shown in FIG.
[0039]
Next, the operation of the electrolyzed water generating apparatus 1 according to this embodiment shown in FIGS. 1 to 3 will be described.
[0040]
In the electrolyzed water generating apparatus 1 of the present embodiment, normal tap water is used as raw water. First, a concentrated sodium chloride aqueous solution 14 is supplied from a concentrated sodium chloride aqueous solution tank 14 to the raw water conduit 11 by a metering pump 15. A sodium chloride aqueous solution having a concentration ranging from 0.025 to 0.05 mol / liter (1.46 to 2.93 g / liter) is prepared, and the sodium chloride aqueous solution is supplied from the sodium chloride aqueous solution supply conduits 9 and 10 to each electrolytic chamber 6. , 7 to the sodium chloride aqueous solution introduction parts 35, 36. The sodium chloride aqueous solution introduced into the sodium chloride aqueous solution introducing portions 35 and 36 reaches the electrolytic water extraction portions 37 and 38 through the liquid passages 45 and 46 and is extracted from the electrolytic water extraction conduits 16 and 17.
[0041]
Next, when electrolysis is performed by the control means 27 using, for example, the electrode 3 as an anode and the electrode 4 as a cathode, the reactions represented by the above formulas (1) to (4) occur in the electrolytic chamber 6 on the anode side, and effective residual chlorine Acidic electrolyzed water containing water is generated, and in the electrolysis chamber 7 on the cathode side, the reaction represented by the above formula (5) occurs to generate alkaline electrolyzed water. At this time, the electrolyzed water outlets 37 and 38 are connected to the diluting water supply conduit connectors 43 and 44 provided at the end opposite to the end where the electrolyzed water outlet conduits 41 and 42 are provided. Raw water not containing sodium chloride is supplied as dilution water from the connected dilution water supply conduits 22 and 23. The dilution water is supplied in an amount (1: 1) substantially equal to the sodium chloride aqueous solution supplied from, for example, the sodium chloride aqueous solution supply conduits 9 and 10, and as a result, electrolyzed water diluted at the magnification is obtained.
[0042]
During the electrolysis, gaseous chlorine and oxygen are generated in the electrolytic chamber 6 on the anode side with the reaction, and the chlorine and oxygen form bubbles and adhere to the electrode 3. On the other hand, since the sodium chloride aqueous solution introduced into the sodium chloride aqueous solution introduction part 35 forms a gentle water flow that reaches the electrolyzed water extraction part 37 along the liquid passage 45, the bubbles of chlorine and oxygen are generated by the water flow. 3 is gathered at the upper end of the electrode 3 provided facing the dilution water supply conduit connection part 43 in the electrolyzed water extraction part 37, and the upper end part of the electrode 3 is attached in a large number. Form. Then, the chlorine and oxygen bubbles collected at the upper end of the electrode 3 are stirred by a new water flow using the dilution water directly supplied to this portion, and the dissolution is promoted.
[0043]
As a result, the residual chlorine concentration contained in the acidic electrolyzed water taken out from the electrode chamber 6 increases, and the chlorine and oxygen bubbles are removed from the surface of the electrode 3 to improve the electrolysis efficiency.
[0044]
At this time, the diluting water supply conduit 22 is connected to the diluting water supply conduit connecting portion 43 provided at the end of the electrolyzed water extracting portion 37 opposite to the end where the electrolyzed water extracting conduit connecting portion 41 is provided. It is connected. Therefore, while the dilution water supplied from the dilution water supply conduit 22 flows from the dilution water supply conduit connection portion 43 side toward the electrolyzed water extraction conduit connection portion 41, the chlorine and oxygen bubbles are efficiently dissolved while stirring. Can be promoted.
[0045]
Moreover, the dilution water supply conduit connection part 43 may include an orifice. As a result of the dilution water being supplied into the electrolyzed water extraction part 37 through the orifice, the flow rate is increased and the bubbles of chlorine and oxygen are entrained and flow, so that the bubbles of chlorine and oxygen are more efficiently dissolved. Can be promoted.
[0046]
Further, during the electrolysis, gaseous hydrogen is generated in the electrolysis chamber 7 on the cathode side with the reaction, and the hydrogen forms bubbles and adheres to the electrode 4. However, as in the case of the electrolytic chamber 6 on the anode side, the hydrogen bubbles are introduced into the sodium chloride aqueous solution introduction part 36 and are caused by a gentle water flow of the sodium chloride aqueous solution along the liquid passage 46 to the electrolytic water extraction part 38. Collected at the upper end of the electrode 4, the upper end portion of the electrode 4 forms a state in which many adhere to it. Then, bubbles can be removed from the surface of the electrode 4 by a new water flow using the dilution water supplied to this portion from the dilution water supply conduit 24. Accordingly, the electrolysis efficiency is improved also in the electrolysis chamber 7 on the cathode side.
[0047]
Next, the acidic electrolyzed water obtained in the electrolysis chamber 6 is extracted from the electrolysis chamber 6 by the electrolyzed water extraction conduit 16 connected to the electrolyzed water extraction conduit connection portion 41. At this time, the control device 27 connects the electrolyzed water outlet conduit 16 and the acidic electrolyzed water outlet conduit 20 by the three-way valve 18 corresponding to the setting in which the electrode 3 is the anode and the electrode 4 is the cathode, and the three-way valve 19. Thus, the electrolyzed water extraction conduit 17 and the alkaline electrolyzed water extraction conduit 21 are connected. Therefore, the acidic electrolyzed water is taken out from the acidic electrolyzed water outlet conduit 20.
[0048]
Next, in the electrolyzed water generating apparatus 1 of the present embodiment and the conventional electrolyzed water generating apparatus, the electrolysis current leading to the electrodes 3 and 4 is changed to be included in the electrolysis current and the acidic electrolyzed water obtained in the electrolysis chamber 6. The relationship with the residual chlorine concentration is compared. The conventional electrolyzed water generating apparatus is the same as the electrolyzed water generating apparatus 1 of the present embodiment shown in FIG. 1 except that the dilution water supply conduits 22 and 23 are connected to the electrolyzed water extraction conduits 16 and 17, respectively. Except for supplying dilution water, the configuration is exactly the same as the electrolyzed water generating apparatus 1. The concentration, supply amount, and dilution water supply amount of the sodium chloride aqueous solution are exactly the same as those of the electrolyzed water generating device 1 of the present embodiment and the conventional electrolyzed water generating device. The results are shown in FIG.
[0049]
From FIG. 4, according to the electrolyzed water generating apparatus 1 of the present embodiment, the residual chlorine concentration contained in the acidic electrolyzed water obtained in the electrolysis chamber 6 is the conventional electrolyzed water regardless of the magnitude of the electrolysis current. Obviously it will be higher than the generator. This has shown that the electrolyzed water generating apparatus 1 of this embodiment can obtain the electrolyzed water containing a residual chlorine of a high density | concentration than the conventional electrolyzed water generating apparatus, if the dilution rate is the same.
[0050]
In addition, according to the electrolyzed water generating apparatus 1 of the present embodiment, the result of FIG. 4 shows that when obtaining electrolyzed water containing residual chlorine having the same concentration, the dilution rate is made higher than that of the conventional electrolyzed water generating apparatus. This shows that the yield of the acidic electrolyzed water can be increased.
[0051]
Next, in the electrolyzed water generating device 1 of the present embodiment and the conventional electrolyzed water generating device, the ratio of the amount of charge applied to the sodium chloride aqueous solution to the flow rate of the sodium chloride aqueous solution supplied to the electrolysis chambers 6 and 7 is The relationship with the pH of the acidic electrolyzed water produced in the electrolysis chamber 6 was compared. The results are shown in FIG. In FIG. 5, the ratio of the amount of charge (I) applied to the sodium chloride aqueous solution to the flow rate (Q) of the sodium chloride aqueous solution is shown as a logarithm of I / Q.
[0052]
From FIG. 5, according to the electrolyzed water generating apparatus 1 of the present embodiment, the pH of the acidic electrolyzed water obtained in the electrolyzing chamber 6 is the conventional electrolyzed water generating regardless of the value of I / Q. Obviously it is lower than the device. This is because, in the electrolyzed water generating apparatus 1 of the present embodiment, the proton (H ⁺ ) generating efficiency in the reactions represented by the above formulas (1) and (4) is higher than that of the conventional electrolyzed water generating apparatus. Indicates that it has been improved.
[0053]
Next, in the electrolyzed water generating apparatus 1 of this embodiment and the conventional electrolyzed water generating apparatus, the electric power consumed in the electrolyzed water generating apparatus was compared to obtain electrolyzed water containing 30 ppm of residual chlorine. The results are shown in FIG.
[0054]
From FIG. 6, according to the electrolyzed water generating apparatus 1 of this embodiment, it is clear that compared with the conventional electrolyzed water generating apparatus, power consumption is small and the electrolysis efficiency is improved.
[0055]
In the embodiment, the case where the control device 27 sets the electrode 3 as an anode and the electrode 4 as a cathode has been described as an example. However, in the electrolyzed water generating device 1 of the present embodiment, the polarity of the electrodes 3 and 4 is changed even when the polarity of the electrodes 3 and 4 is switched by the control device 27 and the electrode 3 is a cathode and the electrode 4 is an anode. The operation is exactly the same as in the above embodiment except that the liquidity of the electrolyzed water generated in the electrolysis chambers 6 and 7 is reversed.
[0056]
In this case, the control means 27 connects the electrolyzed water outlet conduit 17 and the acidic electrolyzed water outlet conduit 20 by the three-way valve 18 corresponding to the setting in which the electrode 3 is a cathode and the electrode 4 is an anode. The electrolytic water outlet conduit 16 and the alkaline electrolytic water outlet conduit 21 are connected by 19. Therefore, the acidic electrolyzed water is still taken out from the acidic electrolyzed water outlet conduit 20.
[0057]
Moreover, although the case where sodium chloride is added to raw | natural water is shown in the said embodiment, it may replace with sodium chloride and may make it use other chlorides, such as potassium chloride.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram showing an example of an electrolyzed water generating apparatus of the present invention.
FIG. 2 is a longitudinal sectional view of the electrolytic cell shown in FIG.
3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is a graph showing a comparison between the embodiment shown in FIG. 1 and a conventional example regarding the relationship between the electrolysis current in the electrolyzed water generator and the residual chlorine concentration contained in the generated electrolyzed water.
FIG. 5 is a graph showing a comparison between the embodiment shown in FIG. 1 and the conventional example regarding the relationship between the amount of charge per flow rate of electrolyzed water in the electrolyzed water generating device and the pH of the generated electrolyzed water.
FIG. 6 is a histogram showing a comparison between the embodiment shown in FIG. 1 and the conventional example regarding the electric power consumed in the electrolyzed water generating device to obtain electrolyzed water containing residual chlorine having the same concentration.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Electrolyzed water production | generation apparatus, 2 ... Electrolysis tank, 3, 4 ... Electrode, 5 ... Ion-permeable diaphragm, 6, 7 ... Electrolytic chamber, 9, 10 ... Electrolyzed water supply means, 14, 15 ... Chloride addition Means 16, 17, 20 ... Acidic electrolyzed water extraction means 22, 23 ... Dilution water supply means.

Claims (4)

An ion-permeable diaphragm is provided between a pair of electrodes arranged opposite to each other, and an electrolytic cell separated into two electrolytic chambers by the diaphragm, and chloride is added to the raw water supplied to each electrolytic chamber. Chloride addition means for preparing an aqueous solution, electrolyzed water supply means for supplying the chloride aqueous solution as electrolyzed water to each electrolysis chamber, and acidic electrolysis for removing acidic electrolyzed water containing chlorine from the electrolysis chamber on the anode side In the electrolyzed water generating device comprising water extraction means,
An electrolyzed water generating apparatus comprising: a diluting water supplying means for supplying diluting water for diluting the generated electrolyzed water at least in the vicinity of the acidic electrolyzed water extracting means in the electrolytic chamber on the anode side. The electrolyzed water supply means supplies the aqueous chloride solution from the bottom of each electrolysis chamber, and the acidic electrolyzed water take-out means takes out the acidic electrolyzed water from the top of the electrolysis chamber on the anode side. The electrolyzed water generating apparatus according to claim 1. 3. The electrolyzed water generating device according to claim 1, wherein the electrode is provided at a position facing the dilution water supply means in the electrolysis chamber on the anode side. The electrolyzed water generating apparatus according to any one of claims 1 to 3, wherein the dilution water supply means supplies the raw water as the dilution water.

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