JP4565867B2 - Ultrasonic cleaning equipment using electrolytic alkaline water - Google Patents

Ultrasonic cleaning equipment using electrolytic alkaline water Download PDF

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JP4565867B2
JP4565867B2 JP2004081852A JP2004081852A JP4565867B2 JP 4565867 B2 JP4565867 B2 JP 4565867B2 JP 2004081852 A JP2004081852 A JP 2004081852A JP 2004081852 A JP2004081852 A JP 2004081852A JP 4565867 B2 JP4565867 B2 JP 4565867B2
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alkaline water
electrolytic alkaline
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turbidimeter
oil
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JP2005262155A (en
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あや子 森下
孝司 銀山
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Amano Corp
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Description

本発明は、機械・金属・エレクトロニクスを始めとする技術分野全般における各種の金属部品類、光学レンズ類、又樹脂部品類といった被洗浄物を、電解アルカリ性水を用いて超音波洗浄する超音波洗浄装置に関し、特に脱脂を主目的とする洗浄における洗浄水の油分濃度管理を好適に行うことのできる電解アルカリ性水を用いた超音波洗浄装置に関するものである。   The present invention is an ultrasonic cleaning method for ultrasonically cleaning an object to be cleaned such as various metal parts, optical lenses, and resin parts in technical fields including machinery, metals, and electronics using electrolytic alkaline water. More particularly, the present invention relates to an ultrasonic cleaning apparatus using electrolytic alkaline water that can suitably perform oil concentration control of cleaning water in cleaning mainly for degreasing.

特許文献１に記載されている「アルミニウム製部品等の脱脂洗浄方法」には、アルミニウム製部品の洗浄に関し、脱脂を主目的とした洗浄方法に関する記載がされている。この文献の中で、ワークに付着した汚れ、つまり、油脂や切削屑は、洗浄槽内で超音波振動や水中ジェットの働きによって剥離除去されて洗浄される。そして除去された油分は、洗浄槽の水面部に分離して浮上、オーバーフローされると共に、槽外に排出される。また、ワークの洗浄が完了して槽から引き上げる際には、純水をシャワー状にしてかけ、洗浄槽の水面部に分離されて浮上する油が再びワークに付着しないように構成されている。しかし、分離された浮上油をワークに再付着しないようにするには、多くのリンス水を必要とすると共に、シャワー洗浄設備等の設備上の負担が多くなる問題がある。   The “degreasing and cleaning method for aluminum parts and the like” described in Patent Document 1 describes a cleaning method mainly for degreasing regarding cleaning of aluminum parts. In this document, dirt adhering to a work, that is, oil and fat and cutting debris, is peeled and removed by ultrasonic vibration and the action of an underwater jet in a cleaning tank. The removed oil is separated to the water surface of the washing tank, floats and overflows, and is discharged outside the tank. In addition, when the workpiece is completely cleaned, when the workpiece is pulled up from the tank, pure water is poured in a shower form so that the oil that is separated and floats on the water surface portion of the cleaning tank does not adhere to the workpiece again. However, in order to prevent the separated floating oil from reattaching to the workpiece, there is a problem that a large amount of rinse water is required and the burden on facilities such as shower cleaning equipment increases.

更に、脱脂を主目的とした洗浄において、油は水に溶けにくい性質上、洗浄によってワークから除かれた油は、槽の中に均一に分散されずに、水と分離して浮上する。つまり、分離された油は、浮上した油層と、油層より下の洗浄水層（一部の油は溶け込む）との２層に分離する。しかし、それぞれの層中の油分濃度は異なるため、単一の濁度計（特許文献２に記載された濁度計）や油分濃度計を使用しても、浮上した油分も含めた槽全体の油汚れを正確に検知することができない問題もある。   Further, in the cleaning mainly for degreasing, the oil is difficult to dissolve in water, so that the oil removed from the workpiece by the cleaning floats separately from the water without being uniformly dispersed in the tank. That is, the separated oil is separated into two layers, a floating oil layer and a washing water layer below the oil layer (part of the oil dissolves). However, since the oil concentration in each layer is different, even if a single turbidimeter (turbidimeter described in Patent Document 2) or an oil concentration meter is used, There is also a problem that oil stains cannot be detected accurately.

また、洗浄水中の油分を正確に計測する為には、洗浄液の油分を溶媒に抽出し、それを重量法又は赤外分光法で測定する方法がとられている。（市販されている油分濃度計には、例えば、堀場製作所、ＯＣＭＡ−３００等がある。）   Further, in order to accurately measure the oil content in the washing water, a method is adopted in which the oil content of the washing liquid is extracted into a solvent and measured by gravimetric method or infrared spectroscopy. (Examples of commercially available oil concentration meters include Horiba, OCMA-300, etc.)

しかしながら、上記の油分濃度計を用いて油分の計測を行うのには、時間がかかり、また、リアルタイムによる汚れの監視を行うことが難しいこともあって、通常は余り好まれず、目視、又は経験的管理が行われていた。また、洗浄水の汚れに対しては、上記特許文献１に記載されている如く、新しい洗浄水を連続的に、又は間欠的に洗浄槽に導入し、分離浮上した油分を槽からオーバーフローさせ、液の汚れを所定のレベルに維持していることが多く、ワーク引き上げ時には、浮上した油がワークに再付着しないように、ワークに純水を掛けて洗い流す方法がとられている。しかし、この方法は多くのリンス水を必要とし、また、設備上の負担が多くなることは、前述した通りである。   However, it takes time to measure the oil content using the above oil concentration meter, and it is difficult to monitor dirt in real time. Empirical management was performed. In addition, as described in Patent Document 1, for cleaning water stains, new cleaning water is continuously or intermittently introduced into the cleaning tank, and the oil component separated and floated is overflowed from the tank. In many cases, the contamination of the liquid is maintained at a predetermined level, and when the workpiece is pulled up, the workpiece is washed with pure water so that the floating oil does not reattach to the workpiece. However, as described above, this method requires a lot of rinse water and increases the burden on the facility.

更に本出願人は、特許文献３に記載の「電解アルカリ性水を用いた超音波洗浄方法とその装置」において、電解アルカリ性水の洗浄効果と、超音波による洗浄効果を利用した洗浄方法、並びにその装置に関する提案を行っている。しかしながら、これら電解アルカリ性水を用いた洗浄においても上記と同様に油分の取り扱いに関する問題が存在する。
特開平８−２６９７５５号公報 特開平７−２０９１８４号公報 特開２０００−３２０９３４号公報 Further, the applicant of the present application described in Patent Document 3 “Ultrasonic cleaning method and apparatus using electrolytic alkaline water”, cleaning method using electrolytic alkaline water cleaning effect, ultrasonic cleaning effect, and its Proposals related to equipment. However, even in the washing using these electrolytic alkaline waters, there is a problem regarding the handling of oil as in the above.
JP-A-8-269755 JP-A-7-209184 JP 2000-320934 A

そこで本発明の技術的課題は、脱脂を主目的とする洗浄において、フロンやエタンの如き法規制により使用が禁止或いは制限されたものを使用するものでなく、環境に安全であること、また、界面活性剤等を含む洗剤であって界面活性剤をリンスする為に大量のリンス水を必要とする洗浄でないことである。   Therefore, the technical problem of the present invention is not to use the one whose use is prohibited or restricted by legal regulations such as Freon and ethane in cleaning mainly for degreasing, and is safe for the environment. It is a detergent that contains a surfactant and the like, and is not a cleaning that requires a large amount of rinse water to rinse the surfactant.

また本発明の他の技術的課題は、脱脂を主目的とする洗浄において、槽内の洗浄水内に持ち込まれた油分を分離浮上させずに、洗浄水中に均一に分散させ、洗浄水に持ち込まれた油分を、必要に応じてリアルタイムに、洗浄水中に設けられた検知器によって検知可能とすること。つまり、洗浄水内の油分濃度をオンラインで検知し、洗浄水中の油分濃度が上昇して分離浮上する状態に成る前に、洗浄水の交換や、新液の追加と云った必要な処置を行うことができるよう、洗浄液中の油分濃度管理を可能にすることである。   Another technical problem of the present invention is that, in cleaning mainly for degreasing, the oil contained in the cleaning water in the tank is uniformly dispersed in the cleaning water without being separated and floated, and is brought into the cleaning water. The detected oil can be detected in real time as needed by a detector installed in the wash water. In other words, the oil concentration in the wash water is detected online, and before the oil concentration in the wash water increases and separates and floats, necessary measures such as replacement of the wash water and addition of new liquid are performed. This makes it possible to control the oil concentration in the cleaning liquid.

（１） 上記の技術的課題を解決するために、本発明の請求項１に係る電解アルカリ性水を用いた超音波洗浄装置は、電気分解によって生成された電解アルカリ性水を洗浄水として超音波洗浄槽に導入することにより、脱脂洗浄を主目的とする被洗浄物を、上記超音波洗浄槽の内部で超音波洗浄するように構成した電解アルカリ性水を用いた超音波洗浄装置であって、上記超音波洗浄槽には、電解アルカリ性水を排水する循環用排出口と、この排出されて来る電解アルカリ性水を再び超音波洗浄槽に導入するための循環用導入口と、油分を含んだ使用済み電解アルカリ性水を排水する洗浄水交換用の電磁バルブと、オーバーフロー用のバルブとを設け、上記循環用導入口と循環用排出口の間を、上記超音波洗浄槽内の電解アルカリ性水を循環させる循環パイプで接続し、この循環パイプの経路中には、電解アルカリ性水の油分濃度の濁度値を検出する濁度計を設けて、この濁度計と上記循環用排出口との間の循環パイプの経路中には、その一番目の口を上記循環用排出口側に接続し、二番目の口を上記濁度計側に接続し、三番目の口を電解アルカリ性水の新液が入っている新液タンク側に接続して成る電磁式切換弁を取付けると共に、上記電解アルカリ性水における油分濃度管理用の濁度値の上限値を設定入力するための入力部と、この設定された上限値を記憶する記憶部と、洗浄運転時に上記の濁度計が上記設定入力された油分濃度管理用の濁度値の上限値を検知した場合に、上記電磁式切換弁を切換制御して、上記三番目の口から二番目の口及び濁度計を経由して上記循環用導入口より超音波洗浄槽へ上記新液タンクからの新しい電解アルカリ性水を追加導入するか、又は、前記洗浄水交換用の電磁バルブを開いて超音波洗浄槽の使用済み電解アルカリ性水の排水、及び、上記電磁式切換弁の切換制御による上記三番目の口から二番目の口及び濁度計を経由する上記新液タンクからの上記新しい電解アルカリ性水の給水とから成る電解アルカリ性水の入れ替えを行うための制御部を設けたことを特徴としている。 (1) In order to solve the above technical problem, an ultrasonic cleaning apparatus using electrolytic alkaline water according to claim 1 of the present invention is ultrasonic cleaning using electrolytic alkaline water generated by electrolysis as cleaning water. An ultrasonic cleaning apparatus using electrolytic alkaline water configured to ultrasonically clean an object to be cleaned mainly for degreasing and cleaning inside the ultrasonic cleaning tank by introducing into the tank, the ultrasonic cleaning tank, a circulation outlet for draining electrolytic alkaline water and circulation inlet port for introducing the electrolytic alkaline water coming is the discharge ultrasonic cleaning tank again, it spent containing oil circulating an electromagnetic valve for wash water exchange to discharge water electrolysis alkaline water, it provided a valve for overflow between the circulation inlet and circulation outlet, the electrolytic alkaline water of the ultrasonic cleaning bath The A turbidity meter that detects the turbidity value of the oil concentration of electrolytic alkaline water is provided in the path of the circulation pipe, and the turbidimeter is connected between the turbidimeter and the circulation outlet. In the circulation pipe path, the first port is connected to the circulation outlet, the second port is connected to the turbidimeter, and the third port is filled with fresh electrolytic alkaline water. An electromagnetic switching valve connected to the new liquid tank inside is installed, and an input unit for setting and inputting an upper limit value of the turbidity value for oil concentration control in the electrolytic alkaline water , and this set a storage unit for storing an upper limit value, if the above turbidimeter during cleaning operation detects the upper limit value of the turbidity values for oil content management is the set input, and switching control of the solenoid selector valve , introducing the circulating via the second mouth and turbidimeter from the third mouth More Ultrasonic into cleaning bath additionally injecting new electrolytic alkaline water from the new chemical tanks or drainage by opening the electromagnetic valve for the washing water exchange of a used electrolytic alkaline water ultrasonic cleaning tank, and, In order to replace the electrolytic alkaline water consisting of the third through second ports by the switching control of the electromagnetic switching valve and the new electrolytic alkaline water supply from the new liquid tank via the turbidimeter. It is characterized in that a control unit.

（２） また、本発明の請求項２に係る電解アルカリ性水を用いた超音波洗浄装置は、濁度計が、透過光測定方式濁度計、又は、散乱光測定方式濁度計であることを特徴としている。 ( 2 ) Moreover, as for the ultrasonic cleaning apparatus using the electrolytic alkaline water which concerns on Claim 2 of this invention, a turbidimeter is a transmitted light measuring system turbidimeter or a scattered light measuring system turbidimeter. It is characterized by.

上記（１）で述べた手段によれば、電解アルカリ性水に、脱脂を主目的とする被洗浄物が投入され、超音波洗浄を行うと、被洗浄物に付着した油脂等の油分は超音波の作用で剥離して分離されて洗浄され、また、上記の洗浄により、ワークから分離された油分は超音波の作用で微細化される。 According to the means described in (1) above, when an object to be cleaned that is primarily intended for degreasing is put into electrolytic alkaline water and subjected to ultrasonic cleaning, oil such as oil and fat adhering to the object to be cleaned becomes ultrasonic. The oil component separated from the workpiece and cleaned by the above-described cleaning is refined by the action of ultrasonic waves.

電解アルカリ性水中には、溶存水素と微細気泡水素が存在しており、超音波による物理力を高めている関係上、洗浄効果を高めると共に、汚れである油分を分散させやすい性質を有する。更に、電解アルカリ性水中では、非水溶性の金属加工油に添加剤として含まれる油脂が、鹸化されて界面活性効果を持つ物質に変わることもあって、油分散の安定化に奇与する。   In the electrolytic alkaline water, dissolved hydrogen and fine bubble hydrogen exist, and since the physical force by the ultrasonic wave is enhanced, the cleaning effect is enhanced and the oil component which is dirt is easily dispersed. Furthermore, in electrolytic alkaline water, the fats and oils contained as additives in the water-insoluble metalworking oil may be saponified and changed to substances having a surface-active effect, which will contribute to stabilization of oil dispersion.

尚、油脂を含まない加工油（切削油・ＧＣ−３２・新日本石油製）であったとしても、図７（Ａ）に示すように同傾向が示される。しかしながら、安定に存在できる時間は、油脂が含まれている油と比較すると短い傾向があった。（図７（Ｂ）参照）   Even if the processing oil does not contain oil (cutting oil, GC-32, manufactured by Nippon Oil Corporation), the same tendency is shown as shown in FIG. However, the time that can exist stably tended to be short as compared with oils containing fats and oils. (See Fig. 7 (B))

このようにしてワークから分離された油分は、上記超音波の作用と電解アルカリ性水中に含まれた溶存水素や微細気泡水素の働きにより洗浄液に均一に分散されることになる。均一に乳化分散された油分は、濁度が大きくなり、濁度計により検出されて検知出力を出力する。検知出力は、一定の油分濃度内においては投入した油分に対して比例的に推移し、一定の限界値を過ぎると洗浄水と分離し、浮上する結果になる。   The oil component separated from the workpiece in this way is uniformly dispersed in the cleaning liquid by the action of the ultrasonic waves and the action of dissolved hydrogen and fine bubble hydrogen contained in the electrolytic alkaline water. The oil that has been uniformly emulsified and dispersed has a high turbidity, and is detected by a turbidimeter and outputs a detection output. The detection output changes in proportion to the amount of oil supplied within a certain oil concentration, and when it exceeds a certain limit value, it separates from the wash water and rises.

従って、濁度計の示す値を管理することで、油分濃度を所定の値以内に管理することができる。また、油分濃度が洗浄品質に影響することも判明しており（図６参照）、必要な管理限界値を設定し、品質管理を行うことが可能になる。 Therefore, the oil concentration can be managed within a predetermined value by managing the value indicated by the turbidimeter. It has also been found that the oil concentration affects the cleaning quality (see FIG. 6), and it becomes possible to set the necessary control limit values and perform quality control.

尚、工業用水や河川水中などの油分濃度の測定に濁度計が用いられる例があるが、水中に安定的に分散できる油濃度は、超音波振動を用いても極めて低い。つまり、水と油の２層に分離してしまう。そこで電解アルカリ性水以外の水について、確認の実験を行ったが、前述したように、油分と水が分離してしまい、油分が洗浄液に均一に分散することが無かった。また、水溶性の洗剤を入れた洗浄液では、油分洗浄後の経過の中で濁度計の示す値が変化し、正しい油分濃度を検知できなかった。よって、電解アルカリ性水を使用して油分を超音波洗浄するケースにおいてのみ、洗浄液に油分が均一に分散させることができ、濁度計を使用した油分濃度検知が可能であり、尚かつ、時間経過における濁度計における計測値の変化が生じることがなく、安定的に油分濃度を計測することができるものと言える。   Although there is an example in which a turbidimeter is used for measuring the oil concentration in industrial water or river water, the oil concentration that can be stably dispersed in water is extremely low even when ultrasonic vibration is used. That is, it will separate into two layers of water and oil. Therefore, a confirmation experiment was conducted on water other than electrolytic alkaline water. As described above, the oil and water were separated, and the oil was not uniformly dispersed in the cleaning liquid. Moreover, in the cleaning liquid containing a water-soluble detergent, the value indicated by the turbidimeter changed during the course of oil cleaning, and the correct oil concentration could not be detected. Therefore, only in the case of ultrasonically cleaning the oil using electrolytic alkaline water, the oil can be uniformly dispersed in the cleaning liquid, and the oil concentration can be detected using a turbidimeter, and the time has elapsed. It can be said that the oil concentration can be stably measured without any change in the measured value in the turbidimeter.

図２は、電解アルカリ性水に油分を投入し、超音波をかけた場合における油分濃度と濁度計の示すグラフ（溶媒抽出による油分濃度分析値と濁度計値の関係を示す）であり、油分濃度に対する濁度計の示す値は比例的な関係であるのに対して、図４の水道水に油を混入した場合に示す油分濃度に対する濁度計の示す値は比例的な関係を示さない。つまり油分を同じ量加えた場合、電解アルカリ性水は濃度を正しく検知できるが、水道水では油が浮上してしまい、濁度計により正しく検出できない。尚、図２又は図４における油分濃度値は、予め油分濃度計（例えば、堀場製作所 ＯＣＭＡ−３００）を用いて測定した洗浄水である。   FIG. 2 is a graph showing an oil concentration and a turbidimeter when oil is added to electrolytic alkaline water and ultrasonic waves are applied (showing a relationship between an oil concentration analysis value by solvent extraction and a turbidimeter value), The value indicated by the turbidimeter with respect to the oil concentration is proportional, whereas the value indicated by the turbidimeter with respect to the oil concentration when oil is mixed in the tap water in FIG. 4 shows a proportional relationship. Absent. In other words, when the same amount of oil is added, the electrolytic alkaline water can correctly detect the concentration, but tap water causes the oil to float and cannot be detected correctly by the turbidimeter. In addition, the oil concentration value in FIG. 2 or FIG. 4 is the wash water measured beforehand using the oil concentration meter (for example, Horiba OCMA-300).

上述した油分濃度の管理値を油分の浮上限界値とすれば、最悪の状態でも浮上した油が再付着することを防止できる。また、管理値を検知したら、新しい電解アルカリ性水を導入し、古い洗浄水を廃棄するように各制御手段が動作することで、自動化運転することができる。   If the management value of the oil concentration described above is used as the oil floating limit value, it is possible to prevent the floating oil from reattaching even in the worst state. In addition, when the control value is detected, automatic operation can be performed by operating each control unit so as to introduce new electrolytic alkaline water and discard the old washing water.

更に上記（１）で述べた請求項１に係る手段によれば、記憶部に管理目標とする油分濃度に対応した濁度計の値を記憶させておき、濁度計が記憶された値を検知すると、その検知信号を発信し、新液交換、新液追加の為の洗浄水導入、並びに洗浄水排出のための制御を行う。   Further, according to the means according to claim 1 described in the above (1), the turbidimeter value corresponding to the oil concentration as the management target is stored in the storage unit, and the value stored in the turbidimeter is stored. When detected, the detection signal is transmitted, and control is performed for replacement of new liquid, introduction of cleaning water for adding new liquid, and discharging of cleaning water.

更に加えて、上記（１）で述べた請求項１に係る手段によれば、洗浄水としての電解アルカリ性水が循環する箇所に濁度計を設けたから、洗浄槽の洗浄水濃度を平均的に検知できると共に、新液タンクに収容された新しい電解アルカリ性水（新液）が濁度計のところを経由しながら給水されて、濁度計を洗浄するから、濁度計の汚れによる誤検知を防止することができる。 In addition, according to the means according to claim 1 described in the above (1), since the turbidity meter is provided at the location where the electrolytic alkaline water as the cleaning water circulates, the cleaning water concentration in the cleaning tank is averaged. In addition to being able to detect , new electrolytic alkaline water (new solution) contained in the new solution tank is fed through the turbidimeter and the turbidimeter is washed, so false detection due to contamination of the turbidimeter Can be prevented.

また、上記（１）で述べた請求項１に係る手段によれば、電解アルカリ性水の濁度管理値や、その上限値を入力することで、品質上必要な油分濃度を設定できると共に、油分が分離浮上する値を設定することで、浮上油のワークへの再付着を防止でき、また、濁度計が、乳化した油分を検知して濁度として捉えることができる。 Further, according to the means according to claim 1 described in the above (1), and turbidity control value of the electrolytic alkaline water, can the upper limit value by inputting, setting the required oil content quality Rutotomoni, By setting the value at which the oil component separates and floats, reattachment of the floating oil to the workpiece can be prevented, and the turbidimeter can detect the emulsified oil component and capture it as turbidity.

以上述べた次第で、本発明に係る電解アルカリ性水を用いた超音波洗浄装置によれば、脱脂を目的とする洗浄において、濁度計の汚れによる誤検知を防止して、洗浄液中の油分濃度を目標値以下に抑えて洗浄品質の向上を図ると共に、無駄な洗浄水の使用を減らし、設備費を最少に抑える経済性を備え、且つ、環境にも悪影響をもたらすことのない安全な洗浄装置を提供することができる。 As described above, according to the ultrasonic cleaning apparatus using the electrolytic alkaline water according to the present invention, in the cleaning intended for degreasing, the false concentration due to contamination of the turbidimeter is prevented, and the oil concentration in the cleaning liquid is reduced. Is a safe cleaning device that improves the cleaning quality by reducing the amount to less than the target value, reduces the use of wasted cleaning water, minimizes equipment costs, and does not adversely affect the environment. Can be provided.

以下に、上述した本発明に係る電解アルカリ性水を用いた超音波洗浄装置の実施の形態を、図１に示した構成図に基づいて説明すると、図中１は底部に超音波発振機２を設けた超音波洗浄槽、ＡＷはこの洗浄槽１内に収容された電解アルカリ性水（洗浄水）で、被洗浄物はこの電解アルカリ性水ＡＷの中で超音波洗浄される。３Ａと３Ｂは超音波洗浄槽１の上側部と下側部に設けたオーバーフロー用バルブと液交換用（排水用）の電磁バルブであって、これ等上下のバルブ３Ａ，３Ｂによって洗浄水排出部３が構成される。   Hereinafter, an embodiment of an ultrasonic cleaning apparatus using electrolytic alkaline water according to the present invention will be described with reference to the configuration diagram shown in FIG. 1. In FIG. 1, reference numeral 1 denotes an ultrasonic oscillator 2 at the bottom. The ultrasonic cleaning tank AW provided is electrolytic alkaline water (cleaning water) accommodated in the cleaning tank 1, and the object to be cleaned is ultrasonically cleaned in the electrolytic alkaline water AW. Reference numerals 3A and 3B denote an overflow valve and a liquid exchange (drainage) electromagnetic valve provided on the upper and lower parts of the ultrasonic cleaning tank 1, respectively, and a washing water discharge section is provided by these upper and lower valves 3A and 3B. 3 is configured.

１０と１２は上記超音波洗浄槽１の上側部と下側部に設けた洗浄水の循環用排水口と導入口であって、１３はこれ等上下の排水口１０と導入口１２の間を結ぶ洗浄水循環パイプ（循環経路）を示し、この循環パイプ１３の上下に連設した排水パイプ１３Ａと導入パイプ１３Ｂが、それぞれ上記排水口１０と導入口１２に連通接続されている。 Reference numerals 10 and 12 denote a cleaning water circulation drain port and an inlet port provided on the upper side and the lower side of the ultrasonic cleaning tank 1, respectively, and reference numeral 13 denotes a space between the upper and lower drain ports 10 and the inlet port 12. A wash water circulation pipe (circulation path) to be connected is shown, and a drain pipe 13A and an introduction pipe 13B connected to the upper and lower sides of the circulation pipe 13 are connected to the drain port 10 and the introduction port 12, respectively.

１５はソレノイド１５Ｍを備えた三つの切換口を有する電磁式切換弁（三方切換弁）で、その一番目の口は上記排水パイプ１３Ａに接続され、二番目の口は上記循環パイプ１３の本管側（導入パイプ１３Ｂ方向）に接続され、三番目の口は電解アルカリ性水の新液が入っている新液タンク１６の供給パイプ１６Ａに接続されている。   15 is an electromagnetic switching valve (three-way switching valve) having three switching ports provided with a solenoid 15M. The first port is connected to the drain pipe 13A, and the second port is the main pipe of the circulation pipe 13. The third port is connected to a supply pipe 16A of a new liquid tank 16 containing a new liquid of electrolytic alkaline water.

１４は上記洗浄水循環パイプ１３の経路中であって、且つ、上記切換弁１５よりも下流位置に設けた透過光測定方式又は散乱光測定方式の濁度計で、この濁度計１４は洗浄水循環パイプ１３内を流れる上記電解アルカリ性水ＡＷ（洗浄水）の濁度値を検出して、その検出値を制御部２０に送る機能を備えている。   14 is a turbidimeter of the transmitted light measurement system or the scattered light measurement system provided in the path of the washing water circulation pipe 13 and downstream of the switching valve 15, and the turbidimeter 14 circulates in the washing water circulation. It has a function of detecting the turbidity value of the electrolytic alkaline water AW (washing water) flowing in the pipe 13 and sending the detected value to the control unit 20.

１７は上記洗浄水循環パイプ１３の経路中に設けたポンプであって、このポンプ１７は上記超音波洗浄槽１内の電解アルカリ性水ＡＷを、洗浄水循環パイプ１３を通して循環する一方、上記切換弁１５の切換に従って、新液タンク１６内の新しい電解アルカリ性水ＡＷを上記超音波洗浄槽１内に供給する機能を備えている。   17 is a pump provided in the path of the washing water circulation pipe 13, and this pump 17 circulates the electrolytic alkaline water AW in the ultrasonic washing tank 1 through the washing water circulation pipe 13, while the switching valve 15 A function of supplying new electrolytic alkaline water AW in the new liquid tank 16 into the ultrasonic cleaning tank 1 according to the switching is provided.

上記の制御部２０には、上記電解アルカリ性水ＡＷの油分濃度管理用の濁度値を設定記憶する記憶部２１と、この濁度値を設定入力するための入力部２２が設けられている。上記の油分濃度管理用の濁度値は、電解アルカリ性水における油分濃度上限値であって、上記濁度計１４が検知した電解アルカリ性水ＡＷの濁度値が、洗浄の時間経過に従ってこの油分濃度管理用の濁度値に達すると、制御部２０が上述した液交換用電磁バルブ３Ｂや、電磁切換弁１５、或いは、ポンプ１７の作動を制御して、超音波洗浄槽１内の電解アルカリ性水ＡＷを、新液タンク１６に入っている新液と入れ替えたり、該超音波洗浄槽１内の電解アルカリ性水ＡＷに新液を補充（注入）して、濁度値を油分濃度管理用の値以下に調整することができる。   The control unit 20 is provided with a storage unit 21 for setting and storing a turbidity value for oil concentration management of the electrolytic alkaline water AW and an input unit 22 for setting and inputting the turbidity value. The turbidity value for oil concentration management is the upper limit value of oil concentration in electrolytic alkaline water, and the turbidity value of electrolytic alkaline water AW detected by the turbidimeter 14 is the oil concentration as the cleaning time elapses. When the turbidity value for management is reached, the control unit 20 controls the operation of the above-described liquid exchange electromagnetic valve 3B, the electromagnetic switching valve 15 or the pump 17, and the electrolytic alkaline water in the ultrasonic cleaning tank 1 is controlled. Replacing the AW with a new solution contained in the new solution tank 16 or replenishing (injecting) the new solution to the electrolytic alkaline water AW in the ultrasonic cleaning tank 1, and the turbidity value is a value for oil concentration control. The following can be adjusted.

濁度管理値は、洗浄対象とされるものの洗浄品質により様々であるので、その必要な値を入力記憶させることが可能であるように構成されている。洗浄槽１に油が浮上しないようにするには、電解アルカリ性水に分散できる油分濃度上限値をその濁度管理値とすれば良い。   The turbidity management value varies depending on the cleaning quality of what is to be cleaned, so that the necessary value can be input and stored. In order to prevent the oil from floating in the cleaning tank 1, the upper limit value of the oil concentration that can be dispersed in the electrolytic alkaline water may be set as the turbidity control value.

上記図示した実施例では、濁度計１４を超音波洗浄槽１に設けた洗浄水循環パイプ１３の途中に設け、且つ、電解アルカリ性水ＡＷをポンプ１７によって強制的に循環させる構成を採用しているため、上記洗浄槽１内における電解アルカリ性水ＡＷの濁度状態を平均的に検知することができる。また、濁度計１４の上流に新液取り入れ用の切換弁１５を設けた関係で、新液供給時に濁度計１４を洗って、濁度計１４の汚れによる感度低下を防止することができる。   In the illustrated embodiment, a configuration in which the turbidimeter 14 is provided in the middle of the cleaning water circulation pipe 13 provided in the ultrasonic cleaning tank 1 and the electrolytic alkaline water AW is forcibly circulated by the pump 17 is adopted. Therefore, the turbidity state of the electrolytic alkaline water AW in the cleaning tank 1 can be detected on average. Further, because the switching valve 15 for introducing a new liquid is provided upstream of the turbidimeter 14, the turbidimeter 14 can be washed when the new liquid is supplied to prevent a decrease in sensitivity due to contamination of the turbidimeter 14. .

以上の如き構成の超音波洗浄装置を用いた実験研究を行った結果、以下の結果を得ることができた。   As a result of conducting an experimental study using the ultrasonic cleaning apparatus having the above configuration, the following results were obtained.

油分が付着したワークに関し、電解アルカリ性水を使用して超音波洗浄すると、電解アルカリ性水の効用と超音波の作用とにより、油分をよく洗い落すことができる。分離除去された油分は、電解アルカリ性水の微細水素泡の効用と超音波の作用とにより、洗浄液中に均一に分散する。   When the workpiece to which the oil component is attached is ultrasonically cleaned using electrolytic alkaline water, the oil component can be well washed away by the effect of the electrolytic alkaline water and the action of ultrasonic waves. The separated and removed oil is uniformly dispersed in the cleaning liquid by the effect of fine hydrogen bubbles of electrolytic alkaline water and the action of ultrasonic waves.

洗浄液中に分散された油分（乳化状態）は、濁度計１４によって検出可能となり、濁度計の示す値から油分濃度を求めることができる。つまり、濁度計１４の示す値は濁度であるが、洗浄水中の油の濃度と、その濃度を示す洗浄水を濁度計１４で計測した際に示す値とを、予め実験値を基に対応させておくことで、濁度計１４の値から油分濃度を計測することができる。（図２参照）   The oil component (emulsified state) dispersed in the cleaning liquid can be detected by the turbidimeter 14, and the oil concentration can be determined from the value indicated by the turbidimeter. That is, the value indicated by the turbidimeter 14 is turbidity, but the concentration of oil in the wash water and the value obtained when the wash water indicating the concentration is measured by the turbidimeter 14 are previously determined based on experimental values. The oil concentration can be measured from the value of the turbidimeter 14 by making it correspond to. (See Figure 2)

また、洗浄槽１内に持ち込まれた油分量は、所定の油分濃度範囲を越えると分離して浮上するが、分離浮上する濃度に至る迄は、濁度計１４の示す値は油分濃度に比例した濁度値を示すことも判明した。このことから、投入された油分は、所定の油分濃度まではその投入量に応じて比例的に洗浄水中に分散して混入されることが判った。（図３参照）   Further, the amount of oil brought into the washing tank 1 separates and floats when it exceeds a predetermined oil concentration range, but the value indicated by the turbidimeter 14 is proportional to the oil concentration until the separated and floated concentration is reached. It was also found to show a high turbidity value. From this, it was found that the input oil was mixed and mixed in the wash water in proportion to the input amount up to a predetermined oil concentration. (See Figure 3)

一方、油分の分散に関し、通常の水道水においては如何なる様相を呈するかを、電解アルカリ性水で行った場合と同様な条件で試みたところ、電解アルカリ性水の場合とは異なり、濁度計１４による検知値は、投入した油分に対応して比例的な値を示すことがなく、一定の濁度値以上の値を示さなかった（洗浄水中に於ける油分濃度が所定濃度以上に上昇しなかった）。つまり、通常の水道水においては、電解アルカリ性水と異なり、超音波をかけても油は水に分散することが難しく、水と油の２層に分離し、洗浄水中に於ける油分濃度は所定の値以上は上昇することが無かった。よって、通常の水道水に混入した油分は、濁度計１４を用いて計測することは不能であるとの結論に至った。   On the other hand, regarding the dispersion of the oil, an attempt was made under the same conditions as in the case of electrolytic alkaline water to determine what aspect in normal tap water. The detected value did not show a proportional value corresponding to the oil content, and did not show a value above a certain turbidity value (the oil concentration in the wash water did not rise above the specified concentration). ). In other words, in ordinary tap water, unlike electrolytic alkaline water, oil is difficult to disperse in water even when subjected to ultrasonic waves, and it is separated into two layers of water and oil, and the oil concentration in the wash water is predetermined. There was no rise above the value of. Therefore, it came to the conclusion that the oil mixed in normal tap water cannot be measured using the turbidimeter 14.

更に、洗浄後の洗浄水を暫く放置し、時間経過に伴う濁度計１４の示す値の変化の様子を調べると、電解アルカリ性水においては、時間経過における濁度計１４の示す変化が生じないのに対して、水溶性の洗剤を使用した洗浄水では、時間の経過に従って、濁度計１４の示す値に変化が生じ、時間の経過と共にその値が低下する結果を示した。従って、洗剤を用いた洗浄水においては、その油分濃度計測を濁度計１４を用いて行うことは適当でないとの結論に達した。（図５参照） Further, when the washing water after washing is left for a while and the state of change of the value indicated by the turbidimeter 14 with the passage of time is examined, in the electrolytic alkaline water, the change indicated by the turbidimeter 14 over time does not occur. On the other hand, in the washing water using a water-soluble detergent, the value indicated by the turbidimeter 14 changed with the passage of time, and the value decreased with the passage of time. Accordingly, it was concluded that it is not appropriate to measure the oil concentration using the turbidimeter 14 in the washing water using the detergent. (See Figure 5)

また、電解アルカリ性水中の油分濃度により、洗浄品質が左右されることが確認された。このことは、濁度計１４を用いて電解アルカリ性水の油分濃度管理を行うことの必要性をより確信するものであり、よりきめ細かな洗浄品質を達成できることを意味するものである。（図６参照）   In addition, it was confirmed that the cleaning quality depends on the oil concentration in the electrolytic alkaline water. This is more convinced of the necessity of managing the oil concentration of electrolytic alkaline water using the turbidimeter 14 and means that finer cleaning quality can be achieved. (See Figure 6)

以上のことから、脱脂を目的とする洗浄において、電解アルカリ性水を用いて超音波洗浄を行い、汚染された洗浄水に含まれる油分濃度を濁度計１４を用いて計測する。この主たる構成から、以下の結果を得ることができた。   From the above, in cleaning intended for degreasing, ultrasonic cleaning is performed using electrolytic alkaline water, and the concentration of oil contained in the contaminated cleaning water is measured using the turbidimeter 14. From this main configuration, the following results could be obtained.

油分の洗浄を効果的に行えること（超音波と電解アルカリ性水の相乗効果）、油分を洗浄水中に均一に分散できること（超音波と電解アルカリ性水中の気体との相乗効果）、洗浄水中の油分濃度を濁度計の値として捉えることを可能にすること（超音波と電解アルカリ性水の作用により油分を、鹸化／乳化して分散する効果）、持ち込まれた油分の量に比例した油分濃度として正確に捉えること（液中に鹸化／乳化作用で分散した油分を濁度計により検知可能に構成したことの効果）、ワークの洗浄時において、洗浄水中の油汚れをリアルタイムで油分濃度として正しく検知できること（洗浄槽内に直接設置し、検知出力手段を設けたこと）、必要とされる脱脂洗浄品質を定め維持する油分濃度管理を可能にすること。   Effective cleaning of oil (synergistic effect of ultrasonic and electrolytic alkaline water), uniform dispersion of oil in cleaning water (synergistic effect of ultrasonic and gas in electrolytic alkaline water), concentration of oil in cleaning water Can be regarded as a turbidimeter value (effect of dispersing and saponifying and emulsifying oil by the action of ultrasonic waves and electrolytic alkaline water), and accurately as an oil concentration proportional to the amount of oil introduced (Effect of making it possible to detect oil content dispersed by saponification / emulsification in the liquid using a turbidimeter) (Installed directly in the washing tank and provided with detection output means), enabling the oil concentration management to determine and maintain the required degreasing quality.

本発明に係る電解アルカリ性水を用いた超音波洗浄装置の全体を説明した構成図。The block diagram explaining the whole ultrasonic cleaning apparatus using the electrolytic alkaline water which concerns on this invention. 電解アルカリ性水（洗浄液）の油分濃度（分析値）と濁度計値との関係を示したグラフ。The graph which showed the relationship between the oil content concentration (analysis value) of electrolysis alkaline water (cleaning liquid), and a turbidimeter value. 持ち込み油分濃度と濁度計値との関係を示したグラフ。A graph showing the relationship between the oil concentration brought in and the turbidimeter value. 水道水中に油を分散させたときの濁度計値を示したグラフ。The graph which showed the turbidimeter value when oil was disperse | distributed in tap water. 洗剤と電解アルカリ性水中の濁度値の比較（経時変化）を示したグラフ。The graph which showed the comparison (aging change) of the turbidity value in detergent and electrolytic alkaline water. 洗浄液油分濃度とワーク残油量の関係を示したグラフ。The graph which showed the relation between cleaning fluid oil concentration and the amount of residual oil. （Ａ）は油脂添加無し加工油の濁度計値を示したグラフ、（Ｂ）は油脂添加無し加工油の濁度計値（経時変化）を示したグラフ。(A) is the graph which showed the turbidimeter value of the processing oil without fat addition, (B) is the graph which showed the turbidity meter value (time-dependent change) of the processing oil without fat addition.

１ 超音波洗浄槽
２ 超音波発振機
３ 洗浄水排出部
３Ａ オーバーフロー用のバルブ
３Ｂ 液交換用の電磁バルブ
１０ 洗浄水の循環用排出口
１２ 洗浄水の循環用導入口
１３ 循環パイプ（循環経路）
１４ 濁度計
１５ 電磁式切換弁
１６ 新液タンク
１７ ポンプ
２０ 制御部
２１ 記憶部
２２ 入力部
ＡＷ 電解アルカリ性水（洗浄水） DESCRIPTION OF SYMBOLS 1 Ultrasonic cleaning tank 2 Ultrasonic oscillator 3 Washing water discharge part 3A Overflow valve 3B Electromagnetic valve for liquid replacement 10 Washing water circulation outlet 12 Washing water circulation inlet 13 Circulation pipe (circulation path)
14 Turbidimeter 15 Electromagnetic switching valve 16 New liquid tank 17 Pump 20 Control unit 21 Storage unit 22 Input unit AW Electrolytic alkaline water (washing water)

Claims (2)

電気分解によって生成された電解アルカリ性水を洗浄水として超音波洗浄槽に導入することにより、脱脂洗浄を主目的とする被洗浄物を、上記超音波洗浄槽の内部で超音波洗浄するように構成した電解アルカリ性水を用いた超音波洗浄装置であって、
上記超音波洗浄槽には、電解アルカリ性水を排水する循環用排出口と、この排出されて来る電解アルカリ性水を再び超音波洗浄槽に導入するための循環用導入口と、油分を含んだ使用済み電解アルカリ性水を排水する洗浄水交換用の電磁バルブと、オーバーフロー用のバルブとを設け、
上記循環用導入口と循環用排出口の間を、上記超音波洗浄槽内の電解アルカリ性水を循環させる循環パイプで接続し、この循環パイプの経路中には、電解アルカリ性水の油分濃度の濁度値を検出する濁度計を設けて、この濁度計と上記循環用排出口との間の循環パイプの経路中には、その一番目の口を上記循環用排出口側に接続し、二番目の口を上記濁度計側に接続し、三番目の口を電解アルカリ性水の新液が入っている新液タンク側に接続して成る電磁式切換弁を取付けると共に、
上記電解アルカリ性水における油分濃度管理用の濁度値の上限値を設定入力するための入力部と、この設定された上限値を記憶する記憶部と、洗浄運転時に上記の濁度計が上記設定入力された油分濃度管理用の濁度値の上限値を検知した場合に、上記電磁式切換弁を切換制御して、上記三番目の口から二番目の口及び濁度計を経由して上記循環用導入口より超音波洗浄槽へ上記新液タンクからの新しい電解アルカリ性水を追加導入するか、又は、前記洗浄水交換用の電磁バルブを開いて超音波洗浄槽の使用済み電解アルカリ性水の排水、及び、上記電磁式切換弁の切換制御による上記三番目の口から二番目の口及び濁度計を経由する上記新液タンクからの上記新しい電解アルカリ性水の給水とから成る電解アルカリ性水の入れ替えを行うための制御部を設けたことを特徴とする電解アルカリ性水を用いた超音波洗浄装置。 By introducing electrolytic alkaline water generated by electrolysis into the ultrasonic cleaning tank as cleaning water, the object to be cleaned mainly for degreasing cleaning is ultrasonically cleaned inside the ultrasonic cleaning tank. An ultrasonic cleaning device using electrolytic alkaline water,
The ultrasonic cleaning tank contained a circulation outlet for draining electrolytic alkaline water and circulation inlet port for introducing the electrolytic alkaline water coming is the discharge ultrasonic cleaning tank again, the oil used requires the electrolytic alkaline water solenoid valve for wash water exchange to discharge water, and a valve for overflow provided,
A circulation pipe that circulates the electrolytic alkaline water in the ultrasonic cleaning tank is connected between the circulation inlet and the circulation outlet, and the oil concentration of electrolytic alkaline water is turbid in the path of the circulation pipe. Provide a turbidimeter to detect the degree value, in the circulation pipe path between this turbidimeter and the circulation outlet, the first mouth is connected to the circulation outlet side, Attach an electromagnetic switching valve with the second port connected to the turbidimeter side and the third port connected to the new solution tank side containing the new solution of electrolytic alkaline water.
It said input section for setting and inputting the upper limit value of the turbidity values for oil content management in electrolytic alkaline water, a storage unit for storing the set upper limit value, said turbidity meter above set during cleaning operation When the upper limit value of the input turbidity value for oil concentration management is detected, the electromagnetic switching valve is controlled to switch from the third port to the second port and the turbidimeter. from circulation inlet to the ultrasonic cleaning tank additionally injecting new electrolytic alkaline water from the new chemical tanks or by opening a solenoid valve for the washing water exchange of a used electrolytic alkaline water ultrasonic cleaning tank drainage, and, of the new electrolytic alkaline water comprising a water electrolytic alkaline water from the new chemical tank via the second mouth and turbidimeter from the third mouth by switching control of the solenoid selector valve order to carry out the replacement Ultrasonic cleaning device using the electrolytic alkaline water, characterized in that a control unit. 濁度計が、透過光測定方式濁度計、又は、散乱光測定方式濁度計であることを特徴とする請求項１に記載の電解アルカリ性水を用いた超音波洗浄装置。   2. The ultrasonic cleaning apparatus using electrolytic alkaline water according to claim 1, wherein the turbidimeter is a transmitted light measuring turbidimeter or a scattered light measuring turbidimeter.
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