WO2012077254A1 - Steam cleaning device for article being cleaned - Google Patents

Steam cleaning device for article being cleaned Download PDF

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Publication number
WO2012077254A1
WO2012077254A1 PCT/JP2011/003732 JP2011003732W WO2012077254A1 WO 2012077254 A1 WO2012077254 A1 WO 2012077254A1 JP 2011003732 W JP2011003732 W JP 2011003732W WO 2012077254 A1 WO2012077254 A1 WO 2012077254A1
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Prior art keywords
liquid
solvent
cleaning
steam
hfe solvent
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PCT/JP2011/003732
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French (fr)
Japanese (ja)
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正英 内野
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ジャパン・フィールド株式会社
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Publication of WO2012077254A1 publication Critical patent/WO2012077254A1/en

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    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/50—Solvents
    • C11D7/5004—Organic solvents
    • C11D7/5018—Halogenated solvents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2230/00—Other cleaning aspects applicable to all B08B range
    • B08B2230/01—Cleaning with steam

Definitions

  • the present invention relates to a steam cleaning apparatus for an object to be cleaned.
  • the outflow of solvent gas to the outside is reduced, and safe steam cleaning with less influence on the environment is enabled.
  • it is intended to reduce the consumption of solvent and enable inexpensive steam cleaning.
  • Patent Document 1 when performing steam cleaning of an object to be cleaned, as shown in Patent Document 1, the object to be cleaned is inserted into a cleaning tank, and cleaning steam is introduced into the cleaning tank to perform steam cleaning.
  • chlorinated solvents such as trichlorethylene, methylene chloride, perchlorethylene, and fluorinated solvents such as HCFC-141b, HCFC-225, and HFC have been widely used.
  • many of these solvents are scheduled to be abolished as ozone-depleting substances, and many of them have a high global warming rate and are restricted in future use. There are also carcinogenic substances and highly toxic substances.
  • petroleum-based solvents, silicone-based solvents, terpene-based solvents, alcohol-based solvents, and the like have been used as alternative solvents that cover these drawbacks.
  • the above-mentioned alternative solvents have a low flash point, and there is a danger of ignition when used.
  • high boiling point materials are used, and in order to use them safely, they must be used under reduced pressure, making the equipment cost expensive and making it difficult to disseminate alternative solvents. .
  • the conventional steam cleaning method has not only the above-mentioned disadvantageous problems in the solvent used, but also a problem that the solvent consumption during standby without performing the cleaning operation is large.
  • hydrofluoroether is known as a solvent of the property different from the said fluorine-type solvent, chlorine-type solvent, and an alternative solvent.
  • This HFE solvent has an ozone depletion coefficient of 0, a low global warming coefficient compared to the above-mentioned fluorine-based solvents, chlorine-based solvents and alternative solvents, and is nonflammable, and is also excellent when used for steam cleaning. It has the characteristics.
  • this HFE solvent is expensive and is about 10 to 30 times more expensive than the above-mentioned fluorinated solvents, chlorinated solvents, and alternative solvents. It was not usable.
  • the present invention is intended to solve the above-described problems, and enables an inexpensive steam cleaning operation while performing steam cleaning using an expensive HFE solvent. That is, even if steam cleaning is performed using an expensive HFE solvent, if the consumption of the HFE solvent can be reduced, the HFE solvent can be used repeatedly. As a result, the HFE solvent is used. An inexpensive steam cleaning operation is possible.
  • the present invention enables inexpensive steam cleaning while using an expensive HFE solvent which is excellent in cleaning performance as well as environmental performance.
  • the present invention forms a steam cleaning tank in order to solve the above-mentioned problems.
  • the steam cleaning tank is filled with an HFE solvent liquid at the bottom, and the upper surface of the HFE solvent liquid is covered with a surface coating liquid formed of a liquid having a specific gravity lower than that of the HFE solvent liquid and a high boiling point.
  • a surface coating liquid formed of a liquid having a specific gravity lower than that of the HFE solvent liquid and a high boiling point.
  • the upper surface of the surface coating liquid is used as a vapor cleaning zone for the object to be cleaned, and the HFE solvent liquid that has condensed and liquefied by contact with the object to be cleaned in this vapor cleaning zone is dropped on the upper surface of the surface coating liquid. It moves from the surface coating liquid side to the HFE solvent liquid side due to the specific gravity difference and is coated with the surface coating liquid.
  • a steam generation tank is connected to the steam cleaning tank via an opening / closing valve, and the HFE solvent liquid filled in the steam generation tank is heated to generate cleaning steam, and the cleaning steam is supplied to the steam cleaning tank. Supply to the steam cleaning zone.
  • the surface coating liquid is a hydrocarbon solvent, terpene solvent, silicone solvent, hydrophilic solvent, water, animal fat or vegetable oil, and has a specific gravity smaller than that of the HFE solvent liquid and has a higher boiling point. Are selectively used in one kind or plural kinds.
  • the present invention is configured as described above, and the upper surface of the HFE solvent liquid is coated with a surface coating liquid formed of a liquid having a lower specific gravity and a higher boiling point than that of the HFE solvent liquid, thereby evaporating the surface coating liquid.
  • a surface coating liquid formed of a liquid having a lower specific gravity and a higher boiling point than that of the HFE solvent liquid, thereby evaporating the surface coating liquid.
  • the HFE solvent liquid condensed into the object to be cleaned by vapor cleaning falls from the object to be cleaned onto the upper surface of the surface coating liquid, but moves from the surface coating liquid side to the HFE solvent liquid side due to the difference in specific gravity with the surface coating liquid.
  • the condensed liquefied liquid is hardly evaporated.
  • the coating with the surface coating liquid can be reliably performed without being affected by manufacturing errors and distortion due to secular change as compared with the case of covering with a lid. Therefore, even if steam cleaning is performed using an expensive HFE solvent, the consumption of the HFE solvent can be made extremely small, so that the HFE solvent can be used repeatedly. As a result, the HFE solvent is used. This makes it possible to perform inexpensive steam cleaning work.
  • the present invention enables inexpensive steam cleaning while using an expensive HFE solvent which is excellent in cleaning performance as well as environmental performance.
  • (1) is a steam cleaning tank, and the bottom is filled with HFE solvent liquid (2).
  • This HFE solvent liquid (2) has an ozone depletion coefficient of 0, a global warming coefficient is lower than that of the above-mentioned fluorine-based solvent, chlorine-based solvent and alternative solvent, and is nonflammable. In some cases, it has excellent properties. Therefore, it is possible to perform a cleaning operation such as steam cleaning without using a pressure resistant tank for decompression.
  • this HFE solvent liquid (2) is expensive, and is about 10 to 30 times more expensive than the above-mentioned fluorine-based solvent, chlorine-based solvent, and alternative solvent. It could not be used easily from the surface.
  • the HFE solvent liquid (2) is cooled by a cooling coil (3) disposed at the bottom of the steam cleaning tank (1).
  • the surface of the HFE solvent liquid (2) is coated with a surface coating liquid (4) formed of a liquid having a specific gravity smaller than that of the HFE solvent liquid (2) and having a high boiling point. Since this coating is not a coating with a solid material such as a lid, but a coating with a liquid, there is no production error, no distortion due to aging, and the surface of the HFE solvent liquid (2). Can be reliably coated and the surface coating liquid (4) evaporates due to this coating, but the HFE solvent liquid (2) does not evaporate or becomes extremely small.
  • the surface coating liquid (4) is a hydrocarbon solvent, a terpene solvent, a silicone solvent, a hydrophilic solvent, water, animal oil, vegetable oil or the like, and is more than the HFE solvent liquid (2).
  • hydrocarbon solvent paraffin solvents, ester solvents, naphthene solvents, aromatic solvents and the like can be used.
  • limonene oil can be used as the terpene solvent
  • silicone oil can be used as the silicone solvent
  • glycol ether solvents, alcohol solvents, and the like can be used as the hydrophilic solvent.
  • the selection can be arbitrarily made according to the purpose of cleaning. For example, if water is selected as the surface coating solution (4), the risk of ignition can be prevented and the surface coating solution (4) can be inexpensive. Can be However, when it is not preferable that water vapor adheres to the surface of the article to be cleaned (5) due to evaporation of water, water and animal fats or vegetable fats and oils are used in combination as the surface coating liquid (4). By forming an oil and fat layer on the surface of water, evaporation of moisture can be prevented, and adhesion of moisture to the object to be cleaned (5) can be prevented.
  • an overflow pipe (6) is arranged on the surface of the surface coating liquid (4), connected to the overflow tank (7), and the oil component separated from the object to be cleaned (5) by steam cleaning of the object to be cleaned (5).
  • the liquid level rises due to, for example, the liquid level flows to the overflow tank (7) to keep the liquid level constant.
  • the upper surface of the surface coating liquid (4) of the steam cleaning tank (1) is used as a steam cleaning zone (8) for the object to be cleaned (5).
  • the supply of steam to the steam cleaning zone (8) is performed in the HFE solvent liquid (2) in the steam generation tank (10) separately formed as shown in FIGS. 1 and 2 adjacent to the steam cleaning tank (1).
  • the HFE solvent liquid (2) is heated to generate cleaning vapor, and this cleaning vapor is supplied through the on-off valve (11).
  • a heater (12) is arranged inside the HFE solvent liquid (2), and a steam retention part (13) is generated on the upper surface of the HFE solvent liquid (2).
  • a partition frame (14) is arranged on the upper surface of the steam cleaning tank (1) through an open / close valve (11) between the partition frame (14) and the HFE solvent liquid (2). 8) is connected.
  • a cooling pipe (15) is wound around the upper surface of the partition frame (14) of the steam generation tank (10) to form a steam condensation zone (16).
  • the HFE solvent liquid (2) in the steam cleaning tank (1) is supplied to the steam cleaning zone (8) through the soot control valve (17), the liquid feed pump (18), the filter (20), and the electromagnetic valve (21). ) Is connected to a shower nozzle (22) arranged on the upper side of the object (5) so that the object to be cleaned (5) can be shower-cleaned.
  • a cooling pipe (23) is wound around the upper part of the steam cleaning zone (8) to form a steam condensation zone (24).
  • the object to be cleaned (5) is moved to the steam cleaning zone (8) of the steam cleaning tank (1) by an appropriate vertical movement mechanism.
  • the liquid feed pump (18) is operated to spray the cooled HFE solvent liquid (2) from the shower nozzle (22) to perform the shower cleaning of the object to be cleaned (5).
  • the HFE solvent liquid (2) sprayed from the shower nozzle (22) by this shower cleaning and contacting the object to be cleaned (5) falls to the surface of the surface coating liquid (4), but the surface coating liquid (4) is HFE.
  • the surface coating liquid (4) passes through the surface coating liquid (4) due to the difference in specific gravity to the HFE solvent liquid (2) side at the bottom of the steam cleaning tank (1). Moving. Therefore, the HFE solvent liquid (2) sprayed from the shower nozzle (22) may come into contact with the outside air and evaporate only while it is located above the surface coating liquid (4). No evaporation occurs after passing through 4).
  • the object to be cleaned (5) that has completed shower cleaning and has been cooled is subjected to steam cleaning.
  • This steam cleaning is performed by introducing cleaning steam from the steam generation tank (10) into the steam cleaning zone (8) by opening the opening / closing valve (11).
  • the object to be cleaned (5) condenses the cleaning steam to perform steam cleaning, and drops the condensed liquefied liquid onto the surface of the surface coating liquid (4).
  • the condensate liquefied liquid of the HFE solvent vapor that has fallen passes through the surface coating liquid (4) due to the difference in specific gravity and passes through the HFE solvent liquid (2 ) Move to the side.
  • the condensed liquefied liquid may evaporate in contact with the outside air only while it is located above the surface coating liquid (4), but it will evaporate after passing through the surface coating liquid (4). It never happens.
  • the object to be cleaned (5) that has completed the steam cleaning is pulled up, dried in the steam condensation zone (24), and then transferred to the outside from the steam cleaning tank (1).
  • the liquid condensed in the vapor condensation zone (24) falls on the surface of the surface coating liquid (4) and passes through the surface coating liquid (4) due to the difference in specific gravity, so that the HFE in the lower bottom of the steam cleaning tank (1). Move to the solvent liquid (2) side.
  • the above shower cleaning is not an essential condition of the present invention, and is arbitrarily selected according to the purpose of cleaning the object to be cleaned (5), and is not necessary for the purpose of cleaning the object to be cleaned (5). May be one in which the object to be cleaned (5) is directly subjected to steam cleaning without performing shower cleaning.
  • the liquid feed pump (18), the filter (20), the shower nozzle (22), and the like are provided to perform the shower cleaning of the object to be cleaned (5).
  • the immersion cleaning tank (25) is formed without the liquid feed pump (18), the filter (20), the shower nozzle (22), etc., and the object to be cleaned is washed in this immersion cleaning tank (25). Steam cleaning is performed after the primary cleaning of the object (5).
  • the cleaning liquid (26) used in the immersion cleaning tank (25) any cleaning liquid according to the cleaning purpose such as a hydrocarbon solvent, a terpene solvent, a silicone solvent, a hydrophilic solvent or the like can be used. Other configurations are the same as those of the first embodiment.
  • HFE solvent liquid was stored in a container, and the evaporation amount of the HFE solvent liquid when the HFE solvent liquid was coated with the surface coating liquid and when the HFE solvent liquid was naturally evaporated without being coated with the surface coating liquid was compared.
  • HFE solvent liquid Novec HFE7200 manufactured by Sumitomo 3M Limited Molecular structure C 4 F 7 OC 2 H 5 Boiling point 76 ° C Density 1.430 g / cm 3
  • Measuring method Sample 1 100 ml of HFE7200 was stored in a 250 ml graduated cylinder and left in a room at room temperature (16 ° C.
  • HFE solvent liquid Novec HFE7200 manufactured by Sumitomo 3M Limited Molecular structure C 4 F 7 OC 2 H 5 Boiling point 76 ° C Density 1.430 g / cm 3
  • Surface coating liquid Hydrocarbon solvent Normal paraffin mainly composed of 11 carbon atoms Boiling point 207 °C Density 0.745g / cm 3
  • Measuring method Sample 3 81.18 g of HFE7200 was placed in a beaker and left in a room at room temperature (16 ° C. to 20 ° C.) without using a surface coating solution.
  • Sample 4 81.18 g of HFE7200 was placed in a beaker, and its surface was covered with a surface coating solution (hydrocarbon solvent 29.59 g) and left in a room at room temperature (16 ° C. to 20 ° C.).
  • the reduction rate of Sample 4 was determined by using the total amount of HFE7200 and the hydrocarbon solvent as the denominator.
  • the hydrocarbon solvent has a lower density than the HFE solvent liquid and reliably covers the surface of the HFE solvent liquid. In this way, when the HFE solvent liquid is sealed with the surface coating liquid (hydrocarbon solvent), the evaporation of the HFE solvent liquid is suppressed, and the evaporation amount becomes extremely small as compared with the case where the coating is not performed.
  • the present invention covers the upper surface of the HFE solvent liquid (2) with the surface coating liquid (4) formed of a liquid having a lower specific gravity and a higher boiling point than that of the HFE solvent liquid (2). Evaporation consumption of the solvent liquid (2) is not generated or can be significantly reduced. For this reason, the HFE solvent liquid (2) stored in the steam cleaning tank (1) does not evaporate or can be significantly reduced even during the steam cleaning operation. Further, it is possible to minimize the evaporation of the HFE solvent liquid (2) that is on standby without performing the steam cleaning operation. Therefore, even if steam cleaning is performed using an expensive HFE solvent liquid (2), the consumption of the HFE solvent liquid (2) can be made extremely small. Therefore, the HFE solvent liquid (2) is repeatedly used. As a result, an inexpensive steam cleaning operation using the HFE solvent (2) is possible. The present invention enables inexpensive steam cleaning while using an expensive HFE solvent which is excellent in cleaning performance as well as environmental performance.

Abstract

Inexpensive steam cleaning work is made possible while carrying out steam cleaning using an expensive liquid HFE solvent. In other words, the amount of liquid HFE solvent consumed while carrying out steam cleaning using an expensive liquid HFE solvent is reduced, and the liquid HFE solvent is used repeatedly. As a result, inexpensive steam cleaning work that uses a liquid HFE solvent is made possible. The present invention can make possible inexpensive steam cleaning while using an expensive liquid HFE solvent, which has superior environmental performance and cleaning performance. The upper surface of a liquid HFE solvent (2) is covered by a surface coating liquid (4) formed in a liquid having a specific gravity lower than and a boiling point higher than the liquid HFE solvent (2). Steam cleaning of an article being cleaned (5) is carried out by supplying cleaning steam generated by heating the liquid HFE solvent (2) at the upper surface of this surface coating liquid (4) and condensing and liquefying this cleaning steam on the article being cleaned (5).

Description

被洗浄物の蒸気洗浄装置Steam cleaning equipment for objects to be cleaned
　本発明は、被洗浄物の蒸気洗浄装置に係るもので、被洗浄物の蒸気洗浄に於いて、溶剤ガスの外部への流出を減少し環境に与える影響が少ない安全な蒸気洗浄を可能とするとともに溶剤の消費を減少し廉価な蒸気洗浄を可能にしようとするものである。 The present invention relates to a steam cleaning apparatus for an object to be cleaned. In the steam cleaning of an object to be cleaned, the outflow of solvent gas to the outside is reduced, and safe steam cleaning with less influence on the environment is enabled. At the same time, it is intended to reduce the consumption of solvent and enable inexpensive steam cleaning.
 
特開平６－７３５８０号公報JP-A-6-73580
　従来、被洗浄物の蒸気洗浄を行う場合は、特許文献１に示す如く、蒸気洗浄を行う被洗浄物を洗浄槽内に挿入し、この洗浄槽内に洗浄蒸気を導入して蒸気洗浄を行うものである。そして、上記の洗浄蒸気を発生させる溶剤としては、トリクロロエチレン、メチレンクロライド、パークロロエチレン等の塩素系溶剤、ＨＣＦＣ－１４１ｂ、ＨＣＦＣ－２２５、ＨＦＣ、等のフッ素系溶剤が広く用いられてきた。しかしながら、これらの溶剤はオゾン破壊物質として全廃予定であったり、温暖化率が高く今後の使用が制限されているものも多い。また、発癌性物質であったり毒性が強いものも存在する。そこで近年これらの欠点をカバーした代替溶剤として、石油系溶剤、シリコーン系溶剤、テルペン系溶剤、アルコール系溶剤等が用いられている。 Conventionally, when performing steam cleaning of an object to be cleaned, as shown in Patent Document 1, the object to be cleaned is inserted into a cleaning tank, and cleaning steam is introduced into the cleaning tank to perform steam cleaning. Is. As the solvent for generating the cleaning vapor, chlorinated solvents such as trichlorethylene, methylene chloride, perchlorethylene, and fluorinated solvents such as HCFC-141b, HCFC-225, and HFC have been widely used. However, many of these solvents are scheduled to be abolished as ozone-depleting substances, and many of them have a high global warming rate and are restricted in future use. There are also carcinogenic substances and highly toxic substances. In recent years, petroleum-based solvents, silicone-based solvents, terpene-based solvents, alcohol-based solvents, and the like have been used as alternative solvents that cover these drawbacks.
　そして、上記の代替溶剤は引火点が低いため使用に引火の危険がある。その引火の危険を避けるために高沸点のものを用いたり、安全に使用するためには減圧下で使用せざるを得ないものとなり、設備費が高価で代替溶剤の普及を困難なものとしている。そのため、一部では環境負荷の高い前述の塩素系溶剤、フッ素系溶剤が未だに使用されている事実がある。また、従来の蒸気洗浄方法では使用する溶剤に上述のごとき不都合な課題があるばかりでなく、洗浄作業を行わない待機中の溶剤の蒸発消耗が多いという課題を有している。 And the above-mentioned alternative solvents have a low flash point, and there is a danger of ignition when used. In order to avoid the risk of ignition, high boiling point materials are used, and in order to use them safely, they must be used under reduced pressure, making the equipment cost expensive and making it difficult to disseminate alternative solvents. . For this reason, some of the above-mentioned chlorinated solvents and fluorinated solvents, which have a high environmental load, are still used. In addition, the conventional steam cleaning method has not only the above-mentioned disadvantageous problems in the solvent used, but also a problem that the solvent consumption during standby without performing the cleaning operation is large.
　そして、フッ素系溶剤ではあるが、前記のフッ素系溶剤、塩素系溶剤、代替溶剤とは異なる性状の溶剤としてハイドロフルオロエーテル(以下ＨＦＥと言う)が知られている。このＨＦＥ溶剤は、オゾン破壊係数は０であり、地球温暖化係数も前記のフッ素系溶剤、塩素系溶剤、代替溶剤に比較し低いとともに不燃性であり、他にも蒸気洗浄に用いる場合に優れた性状を有している。しかしながら、このＨＦＥ溶剤は高価なものであって、前記のフッ素系溶剤、塩素系溶剤、代替溶剤に比較し、約１０～３０倍の高価格となっており、従来はコストの面から容易に使用できないものであった。 And although it is a fluorine-type solvent, hydrofluoroether (henceforth HFE) is known as a solvent of the property different from the said fluorine-type solvent, chlorine-type solvent, and an alternative solvent. This HFE solvent has an ozone depletion coefficient of 0, a low global warming coefficient compared to the above-mentioned fluorine-based solvents, chlorine-based solvents and alternative solvents, and is nonflammable, and is also excellent when used for steam cleaning. It has the characteristics. However, this HFE solvent is expensive and is about 10 to 30 times more expensive than the above-mentioned fluorinated solvents, chlorinated solvents, and alternative solvents. It was not usable.
　そこで、本願発明は上述の如き課題を解決しようとするものであって、高価なＨＦＥ溶剤を用いて蒸気洗浄を行いながら、廉価な蒸気洗浄作業を可能にするものである。即ち、高価なＨＦＥ溶剤を用いて蒸気洗浄を行っても、ＨＦＥ溶剤の消耗を小さなものとする事が出来れば、ＨＦＥ溶剤を繰り返し使用する事が可能となり、結果的にはＨＦＥ溶剤を用いた廉価な蒸気洗浄作業を可能とするものである。本発明は環境性能とともに洗浄性能に優れた高価なＨＦＥ溶剤を用いながら廉価な蒸気洗浄を可能にする事が出来るものである。 Therefore, the present invention is intended to solve the above-described problems, and enables an inexpensive steam cleaning operation while performing steam cleaning using an expensive HFE solvent. That is, even if steam cleaning is performed using an expensive HFE solvent, if the consumption of the HFE solvent can be reduced, the HFE solvent can be used repeatedly. As a result, the HFE solvent is used. An inexpensive steam cleaning operation is possible. The present invention enables inexpensive steam cleaning while using an expensive HFE solvent which is excellent in cleaning performance as well as environmental performance.
　本発明は上述の如き課題を解決するため、蒸気洗浄槽を形成する。この蒸気洗浄槽は、底部にＨＦＥ溶剤液を充填し、このＨＦＥ溶剤液の上面を、ＨＦＥ溶剤液よりも比重が小さいとともに沸点が高い液体にて形成した表面被覆液により被覆する。この表面被覆液による被覆によって、表面被覆液の蒸発消耗は発生するもののＨＦＥ溶剤液の蒸発消耗は発生する事がないか著しく減少させる事ができる。また、この表面被覆液による被覆は、蓋体で被覆する場合に比較して、製作誤差、経年変化による歪み変形等の影響を受ける事が全くなく確実に行う事が可能となる。この表面被覆液の上面を被洗浄物の蒸気洗浄ゾーンとし、この蒸気洗浄ゾーンで被洗浄物と接触し凝縮液化したＨＦＥ溶剤液を、表面被覆液の上面に落下させるが、表面被覆液との比重差により表面被覆液側からＨＦＥ溶剤液側に移動し表面被覆液により被覆されるものである。また、この蒸気洗浄槽に、開閉バルブを介して蒸気発生槽を接続し、この蒸気発生槽の内部に充填したＨＦＥ溶剤液を加熱して洗浄蒸気を発生し、この洗浄蒸気を蒸気洗浄槽の蒸気洗浄ゾーンに供給するものである。 The present invention forms a steam cleaning tank in order to solve the above-mentioned problems. The steam cleaning tank is filled with an HFE solvent liquid at the bottom, and the upper surface of the HFE solvent liquid is covered with a surface coating liquid formed of a liquid having a specific gravity lower than that of the HFE solvent liquid and a high boiling point. By the coating with the surface coating liquid, evaporation of the surface coating liquid occurs, but evaporation of the HFE solvent liquid does not occur or can be significantly reduced. Further, the coating with the surface coating liquid can be reliably performed without being affected by manufacturing errors, distortion deformation due to secular change, and the like as compared with the case of covering with a lid. The upper surface of the surface coating liquid is used as a vapor cleaning zone for the object to be cleaned, and the HFE solvent liquid that has condensed and liquefied by contact with the object to be cleaned in this vapor cleaning zone is dropped on the upper surface of the surface coating liquid. It moves from the surface coating liquid side to the HFE solvent liquid side due to the specific gravity difference and is coated with the surface coating liquid. In addition, a steam generation tank is connected to the steam cleaning tank via an opening / closing valve, and the HFE solvent liquid filled in the steam generation tank is heated to generate cleaning steam, and the cleaning steam is supplied to the steam cleaning tank. Supply to the steam cleaning zone.
　また、表面被覆液は、炭化水素系溶剤、テルペン系溶剤、シリコーン系溶剤、親水性溶剤、水、動物性油脂、植物性油脂であって、ＨＦＥ溶剤液よりも比重が小さく、沸点が高いものを、一種または複数種選択的に用いるものである。 The surface coating liquid is a hydrocarbon solvent, terpene solvent, silicone solvent, hydrophilic solvent, water, animal fat or vegetable oil, and has a specific gravity smaller than that of the HFE solvent liquid and has a higher boiling point. Are selectively used in one kind or plural kinds.
　本発明は上述の如く構成したものであり、ＨＦＥ溶剤液の上面を、ＨＦＥ溶剤液よりも比重が小さいとともに沸点が高い液体にて形成した表面被覆液により被覆することにより、表面被覆液の蒸発消耗は発生するもののＨＦＥ溶剤液の蒸発消耗は発生する事がないか著しく減少させる事ができる。そのため、蒸気洗浄作業中に於いても、蒸気化したＨＦＥ溶剤の蒸発は生じるものの、蒸気洗浄槽の下底に貯留しているＨＦＥ溶剤液の蒸発を発生する事がないか著しく減少させる事ができる。また、蒸気洗浄作業を行っていない待機中のＨＦＥ溶剤液の蒸発を著しく減少することが可能となる。また、蒸気洗浄で被洗浄物に凝縮液化したＨＦＥ溶剤液は、被洗浄物から表面被覆液の上面に落下するが、表面被覆液との比重差により表面被覆液側からＨＦＥ溶剤液側に移動し表面被覆液により被覆されるから、凝縮液化液の蒸発も生じる事が殆どない。 The present invention is configured as described above, and the upper surface of the HFE solvent liquid is coated with a surface coating liquid formed of a liquid having a lower specific gravity and a higher boiling point than that of the HFE solvent liquid, thereby evaporating the surface coating liquid. Although consumption occurs, evaporation consumption of the HFE solvent liquid does not occur or can be significantly reduced. Therefore, even during the vapor cleaning operation, the vaporized HFE solvent evaporates, but the evaporation of the HFE solvent liquid stored in the lower bottom of the vapor cleaning tank does not occur or can be significantly reduced. it can. In addition, it is possible to significantly reduce the evaporation of the HFE solvent liquid that is on standby when the steam cleaning operation is not performed. In addition, the HFE solvent liquid condensed into the object to be cleaned by vapor cleaning falls from the object to be cleaned onto the upper surface of the surface coating liquid, but moves from the surface coating liquid side to the HFE solvent liquid side due to the difference in specific gravity with the surface coating liquid. However, since it is covered with the surface coating liquid, the condensed liquefied liquid is hardly evaporated.
　また、表面被覆液による被覆は、蓋体で被覆する場合に比較して、製作誤差、経年変化による歪み変形等の影響を受ける事が全くなく確実に行う事が可能となる。そのため、高価なＨＦＥ溶剤を用いて蒸気洗浄を行っても、ＨＦＥ溶剤の消耗を極めて小さなものとする事ができるから、ＨＦＥ溶剤を繰り返し使用する事が可能となり、結果的にはＨＦＥ溶剤を用いた廉価な蒸気洗浄作業を可能とするものである。本発明は環境性能とともに洗浄性能に優れた高価なＨＦＥ溶剤を用いながら廉価な蒸気洗浄を可能にする事が出来るものである。 Also, the coating with the surface coating liquid can be reliably performed without being affected by manufacturing errors and distortion due to secular change as compared with the case of covering with a lid. Therefore, even if steam cleaning is performed using an expensive HFE solvent, the consumption of the HFE solvent can be made extremely small, so that the HFE solvent can be used repeatedly. As a result, the HFE solvent is used. This makes it possible to perform inexpensive steam cleaning work. The present invention enables inexpensive steam cleaning while using an expensive HFE solvent which is excellent in cleaning performance as well as environmental performance.
本発明の実施例１を示す断面図。Sectional drawing which shows Example 1 of this invention. 本発明の実施例２を示す断面図。Sectional drawing which shows Example 2 of this invention.
　本発明の実施例を図１に於いて説明すると、（１）は蒸気洗浄槽で、底部にＨＦＥ溶剤液(２)を充填している。このＨＦＥ溶剤液(２)はオゾン破壊係数は０であり、地球温暖化係数も前記のフッ素系溶剤、塩素系溶剤、代替溶剤に比較し低いとともに不燃性であり、他にも蒸気洗浄に用いる場合に優れた性状を有している。そのため、減圧のための耐圧槽を用いなくとも蒸気洗浄等の洗浄作業が可能となる。しかしながら、このＨＦＥ溶剤液(２)は高価なものであって、前記のフッ素系溶剤、塩素系溶剤、代替溶剤に比較し、約１０～３０倍の高価格と成っており、従来はコストの面から容易に使用できないものであった。また、このＨＦＥ溶剤液(２)は蒸気洗浄槽(１)の底部に配置した冷却コイル(３)により冷却されている。 Referring to FIG. 1, an embodiment of the present invention will be described. (1) is a steam cleaning tank, and the bottom is filled with HFE solvent liquid (2). This HFE solvent liquid (2) has an ozone depletion coefficient of 0, a global warming coefficient is lower than that of the above-mentioned fluorine-based solvent, chlorine-based solvent and alternative solvent, and is nonflammable. In some cases, it has excellent properties. Therefore, it is possible to perform a cleaning operation such as steam cleaning without using a pressure resistant tank for decompression. However, this HFE solvent liquid (2) is expensive, and is about 10 to 30 times more expensive than the above-mentioned fluorine-based solvent, chlorine-based solvent, and alternative solvent. It could not be used easily from the surface. The HFE solvent liquid (2) is cooled by a cooling coil (3) disposed at the bottom of the steam cleaning tank (1).
　また、ＨＦＥ溶剤液(２)の表面を、ＨＦＥ溶剤液(２)よりも比重が小さいとともに沸点が高い液体にて形成した表面被覆液(４)により被覆する。この被覆は蓋体等の固形物による被覆ではなく、液体による被覆であるため、蓋体による被覆の如く製作誤差、経年変化による歪み等は全く生じる事がなく、ＨＦＥ溶剤液(２)の表面を確実に被覆する事が可能になるとともにこの被覆によって表面被覆液(４)の蒸発は生じるものの、ＨＦＥ溶剤液(２)の蒸発は生じる事がないか極めて少量となる。また、この表面被覆液(４)は、炭化水素系溶剤、テルペン系溶剤、シリコーン系溶剤、親水性溶剤、水、動物性油脂、植物性油脂等であって、ＨＦＥ溶剤液(２)よりも比重が小さく、沸点が高いものを、一種または複数種選択的に用いるものである。そして、炭化水素系溶剤としては、パラフィン系溶剤、エステル系溶剤、ナフテン系溶剤、芳香族系溶剤等を用いる事ができる。また、テルペン系溶剤としてはリモネン油、シリコーン系溶剤としてはシリコーン油、親水性溶剤としては、グリコールエーテル系溶剤、アルコール系溶剤等を用いる事ができる。 Further, the surface of the HFE solvent liquid (2) is coated with a surface coating liquid (4) formed of a liquid having a specific gravity smaller than that of the HFE solvent liquid (2) and having a high boiling point. Since this coating is not a coating with a solid material such as a lid, but a coating with a liquid, there is no production error, no distortion due to aging, and the surface of the HFE solvent liquid (2). Can be reliably coated and the surface coating liquid (4) evaporates due to this coating, but the HFE solvent liquid (2) does not evaporate or becomes extremely small. The surface coating liquid (4) is a hydrocarbon solvent, a terpene solvent, a silicone solvent, a hydrophilic solvent, water, animal oil, vegetable oil or the like, and is more than the HFE solvent liquid (2). One having a low specific gravity and a high boiling point is selectively used. As the hydrocarbon solvent, paraffin solvents, ester solvents, naphthene solvents, aromatic solvents and the like can be used. Moreover, limonene oil can be used as the terpene solvent, silicone oil can be used as the silicone solvent, and glycol ether solvents, alcohol solvents, and the like can be used as the hydrophilic solvent.
　そして、その選択は洗浄目的に応じて任意に選択する事が出来るが、例えば表面被覆液(４)に水を選択すれば引火の危険を防止する事が出来るとともに表面被覆液(４)を廉価なものとすることが出来る。しかし、水の蒸発によって被洗浄物(５)の表面に水蒸気が付着するのが好ましくない場合は、表面被覆液(４)として水と動物性油脂または植物性油脂を併用する。水の表面に油脂層を形成する事により水分の蒸発を防止し、被洗浄物(５)への水分の付着を防止する事が出来る。また、表面被覆液(４)の液面にはオーバーフロー管(６)を配置しオーバーフロー槽(７)と接続し、被洗浄物(５)の蒸気洗浄によって被洗浄物(５)から分離した油分等によって液面が上昇した場合は、オーバーフロー槽(７)に流動させ液面を一定に保つものである。 The selection can be arbitrarily made according to the purpose of cleaning. For example, if water is selected as the surface coating solution (4), the risk of ignition can be prevented and the surface coating solution (4) can be inexpensive. Can be However, when it is not preferable that water vapor adheres to the surface of the article to be cleaned (5) due to evaporation of water, water and animal fats or vegetable fats and oils are used in combination as the surface coating liquid (4). By forming an oil and fat layer on the surface of water, evaporation of moisture can be prevented, and adhesion of moisture to the object to be cleaned (5) can be prevented. In addition, an overflow pipe (6) is arranged on the surface of the surface coating liquid (4), connected to the overflow tank (7), and the oil component separated from the object to be cleaned (5) by steam cleaning of the object to be cleaned (5). When the liquid level rises due to, for example, the liquid level flows to the overflow tank (7) to keep the liquid level constant.
　また、蒸気洗浄槽(１)の表面被覆液(４)の上面を被洗浄物(５)の蒸気洗浄ゾーン(８)としている。蒸気洗浄ゾーン(８)への蒸気の供給は、蒸気洗浄槽(１)に隣接して図１、図２に示す如く別個に形成した蒸気発生槽(１０)の内部にＨＦＥ溶剤液(２)を充填し、このＨＦＥ溶剤液(２)を加熱して洗浄蒸気を発生し、この洗浄蒸気を開閉バルブ(１１)を介して供給するものである。この蒸気発生槽(１０)はＨＦＥ溶剤液(２)の内部にヒータ(１２)を配置し、ＨＦＥ溶剤液(２)の上面を発生した蒸気の滞留部(１３)とし、この滞留部(１３)の上面に仕切枠(１４)を配置し、この仕切枠(１４)とＨＦＥ溶剤液(２)との間に、開閉バルブ(１１)を介して蒸気洗浄槽(１)の蒸気洗浄ゾーン(８)に接続している。また、蒸気発生槽(１０)の仕切枠(１４)の上面には冷却パイプ(１５)を巻き回して、蒸気の凝縮ゾーン(１６)としている。 Also, the upper surface of the surface coating liquid (4) of the steam cleaning tank (1) is used as a steam cleaning zone (8) for the object to be cleaned (5). The supply of steam to the steam cleaning zone (8) is performed in the HFE solvent liquid (2) in the steam generation tank (10) separately formed as shown in FIGS. 1 and 2 adjacent to the steam cleaning tank (1). The HFE solvent liquid (2) is heated to generate cleaning vapor, and this cleaning vapor is supplied through the on-off valve (11). In this steam generation tank (10), a heater (12) is arranged inside the HFE solvent liquid (2), and a steam retention part (13) is generated on the upper surface of the HFE solvent liquid (2). A partition frame (14) is arranged on the upper surface of the steam cleaning tank (1) through an open / close valve (11) between the partition frame (14) and the HFE solvent liquid (2). 8) is connected. A cooling pipe (15) is wound around the upper surface of the partition frame (14) of the steam generation tank (10) to form a steam condensation zone (16).
　また、蒸気洗浄槽(１)のＨＦＥ溶剤液(２)は、  制御バルブ(１７)、液送ポンプ(１８)、濾過器(２０)、電磁弁(２１)を介して、蒸気洗浄ゾーン(８)の上部に配置したシャワーノズル(２２)に接続し、被洗浄物(５)のシャワー洗浄を可能としている。また、蒸気洗浄ゾーン(８)の上部には冷却パイプ(２３)を巻き回して蒸気凝縮ゾーン(２４)としている。 Further, the HFE solvent liquid (2) in the steam cleaning tank (1) is supplied to the steam cleaning zone (8) through the soot control valve (17), the liquid feed pump (18), the filter (20), and the electromagnetic valve (21). ) Is connected to a shower nozzle (22) arranged on the upper side of the object (5) so that the object to be cleaned (5) can be shower-cleaned. A cooling pipe (23) is wound around the upper part of the steam cleaning zone (8) to form a steam condensation zone (24).
　上述の如く形成したものに於いて被洗浄物(５)の蒸気洗浄を行うには、適宜の上下動機構により被洗浄物(５)を蒸気洗浄槽(１)の蒸気洗浄ゾーン(８)に導入するとともに、液送ポンプ(１８)を作動してシャワーノズル(２２)から冷却したＨＦＥ溶剤液(２)を噴射し、被洗浄物(５)のシャワー洗浄を行う。このシャワー洗浄によってシャワーノズル(２２)から噴射され被洗浄物(５)と接触したＨＦＥ溶剤液(２)は、表面被覆液(４)の表面に落下するが、表面被覆液(４)はＨＦＥ溶剤液(２)よりも比重が小さく、沸点が高いものであるから、比重差により表面被覆液(４)を通過して蒸気洗浄槽(１)の下底のＨＦＥ溶剤液(２)側に移動する。従って、シャワーノズル(２２)から噴射されたＨＦＥ溶剤液(２)は、表面被覆液(４)よりも上方に位置する間だけ、外気と接触し蒸発する可能性があるが、表面被覆液(４)を通過した後は蒸発を生じる事がない。 In order to perform the steam cleaning of the object to be cleaned (5) formed as described above, the object to be cleaned (5) is moved to the steam cleaning zone (8) of the steam cleaning tank (1) by an appropriate vertical movement mechanism. In addition to the introduction, the liquid feed pump (18) is operated to spray the cooled HFE solvent liquid (2) from the shower nozzle (22) to perform the shower cleaning of the object to be cleaned (5). The HFE solvent liquid (2) sprayed from the shower nozzle (22) by this shower cleaning and contacting the object to be cleaned (5) falls to the surface of the surface coating liquid (4), but the surface coating liquid (4) is HFE. Since the specific gravity is smaller and the boiling point is higher than that of the solvent liquid (2), the surface coating liquid (4) passes through the surface coating liquid (4) due to the difference in specific gravity to the HFE solvent liquid (2) side at the bottom of the steam cleaning tank (1). Moving. Therefore, the HFE solvent liquid (2) sprayed from the shower nozzle (22) may come into contact with the outside air and evaporate only while it is located above the surface coating liquid (4). No evaporation occurs after passing through 4).
　また、シャワー洗浄を完了し冷却された被洗浄物(５)は蒸気洗浄を行う。この蒸気洗浄は、開閉バルブ(１１)を開放する事により蒸気発生槽(１０)から洗浄蒸気を蒸気洗浄ゾーン(８)に導入して行う。この洗浄蒸気の導入により、被洗浄物(５)は洗浄蒸気を凝縮液化して蒸気洗浄を行い、凝縮液化液を表面被覆液(４)の表面に落下させる。この落下したＨＦＥ溶剤蒸気の凝縮液化液は、前記のシャワー洗浄の場合と同様に、比重差によって表面被覆液(４)を通過して蒸気洗浄槽(１)の下底のＨＦＥ溶剤液(２)側に移動する。従って、凝縮液化した凝縮液化液は、表面被覆液(４)よりも上方に位置する間だけ、外気と接触し蒸発する可能性があるが、表面被覆液(４)を通過した後は蒸発を生じる事がない。また、蒸気洗浄を完了した被洗浄物(５)は引き上げられ、蒸気凝縮ゾーン(２４)で乾燥された後に蒸気洗浄槽(１)から外部に移送される。また、蒸気凝縮ゾーン(２４)で凝縮液化したものも、表面被覆液(４)の表面に落下し比重差により表面被覆液(４)を通過して蒸気洗浄槽(１)の下底のＨＦＥ溶剤液(２)側に移動する。尚、上記のシャワー洗浄は本発明の必須の条件ではなく、被洗浄物(５)の洗浄目的に応じて任意に選択されるものであり、被洗浄物(５)の洗浄目的から必要でない場合は、シャワー洗浄を行わず被洗浄物(５)の蒸気洗浄を直接行うものであっても良い。 Also, the object to be cleaned (5) that has completed shower cleaning and has been cooled is subjected to steam cleaning. This steam cleaning is performed by introducing cleaning steam from the steam generation tank (10) into the steam cleaning zone (8) by opening the opening / closing valve (11). By introducing the cleaning steam, the object to be cleaned (5) condenses the cleaning steam to perform steam cleaning, and drops the condensed liquefied liquid onto the surface of the surface coating liquid (4). The condensate liquefied liquid of the HFE solvent vapor that has fallen passes through the surface coating liquid (4) due to the difference in specific gravity and passes through the HFE solvent liquid (2 ) Move to the side. Therefore, the condensed liquefied liquid may evaporate in contact with the outside air only while it is located above the surface coating liquid (4), but it will evaporate after passing through the surface coating liquid (4). It never happens. Further, the object to be cleaned (5) that has completed the steam cleaning is pulled up, dried in the steam condensation zone (24), and then transferred to the outside from the steam cleaning tank (1). In addition, the liquid condensed in the vapor condensation zone (24) falls on the surface of the surface coating liquid (4) and passes through the surface coating liquid (4) due to the difference in specific gravity, so that the HFE in the lower bottom of the steam cleaning tank (1). Move to the solvent liquid (2) side. The above shower cleaning is not an essential condition of the present invention, and is arbitrarily selected according to the purpose of cleaning the object to be cleaned (5), and is not necessary for the purpose of cleaning the object to be cleaned (5). May be one in which the object to be cleaned (5) is directly subjected to steam cleaning without performing shower cleaning.
　上記実施例１では、被洗浄物(５)のシャワー洗浄を行うために液送ポンプ(１８)、濾過器(２０)、シャワーノズル(２２)等を備えるものとしたが、他の異なる実施例では図２に示す如く、液送ポンプ(１８)、濾過器(２０)、シャワーノズル(２２)等を備える事なく浸漬洗浄槽(２５)を形成し、この浸漬洗浄槽(２５)で被洗浄物(５)の一次洗浄を行った後に蒸気洗浄を行うものである。この浸漬洗浄槽(２５)で使用する洗浄液(２６)は、炭化水素系溶剤、テルペン系溶剤、シリコーン系溶剤、親水性溶剤等の洗浄目的に応じた任意の洗浄液を用いる事ができる。他の構成については実施例１と同一である。 In the first embodiment, the liquid feed pump (18), the filter (20), the shower nozzle (22), and the like are provided to perform the shower cleaning of the object to be cleaned (5). Then, as shown in FIG. 2, the immersion cleaning tank (25) is formed without the liquid feed pump (18), the filter (20), the shower nozzle (22), etc., and the object to be cleaned is washed in this immersion cleaning tank (25). Steam cleaning is performed after the primary cleaning of the object (5). As the cleaning liquid (26) used in the immersion cleaning tank (25), any cleaning liquid according to the cleaning purpose such as a hydrocarbon solvent, a terpene solvent, a silicone solvent, a hydrophilic solvent or the like can be used. Other configurations are the same as those of the first embodiment.
実験例１Experimental example 1
　ＨＦＥ溶剤液を容器に収納し、このＨＦＥ溶剤液を表面被覆液で被覆した場合と、表面被覆液での被覆を行わず自然蒸発させた場合の、ＨＦＥ溶剤液の蒸発量とを比較した。
　(１)  ＨＦＥ溶剤液
　　　株式会社住友スリーエム　製造の
　　ノベックＨＦＥ７２００
　　分子構造　Ｃ4Ｆ7ＯＣ2Ｈ5
　　沸点　　　７６℃
　　密度　　　１.４３０ｇ／ｃｍ3
　(２)  表面被覆液
　　水
　　分子構造　Ｈ2Ｏ
　　沸点　　　１００℃
　　密度　　　１.０ｇ／ｃｍ3
　(３)  測定方法
　　試料　１
　　２５０ｍｌのメスシリンダーにＨＦＥ７２００を１００ｍｌ収納し、表面被覆液を用いずに常温（１６℃～２０℃）の部屋に放置した。
　　試料　２
　　２５０ｍ１のメスシリンダーにＨＦＥ７２００を１００ｍｌ収納し、その表面を表面被覆液(水５０ｍｌ)で被覆し常温（１６℃～２０℃）の部屋に放置した。
　(４)  減少率
Figure JPOXMLDOC01-appb-T000001
ＨＦＥ溶剤液と表面被覆液(水)との相互溶解度は極めて低く、ほとんど溶け合わず、また水の方がＨＦＥ溶剤液よりも密度が小さく、ＨＦＥ溶剤液の表面を確実に被覆する。この様にＨＦＥ溶剤液を表面被覆液(水)でシールした場合、ＨＦＥ溶剤液の蒸発はおさえられ、被覆をしなかった場合と比較し蒸発量は極めて微少となる。 The HFE solvent liquid was stored in a container, and the evaporation amount of the HFE solvent liquid when the HFE solvent liquid was coated with the surface coating liquid and when the HFE solvent liquid was naturally evaporated without being coated with the surface coating liquid was compared.
(1) HFE solvent liquid Novec HFE7200 manufactured by Sumitomo 3M Limited
Molecular structure C 4 F 7 OC 2 H 5
Boiling point 76 ° C
Density 1.430 g / cm 3
(2) Surface coating solution Water Molecular structure H 2 O
Boiling point 100 ° C
Density 1.0g / cm 3
(3) Measuring method Sample 1
100 ml of HFE7200 was stored in a 250 ml graduated cylinder and left in a room at room temperature (16 ° C. to 20 ° C.) without using a surface coating solution.
Sample 2
100 ml of HFE7200 was placed in a 250 ml graduated cylinder, and the surface thereof was covered with a surface coating solution (50 ml of water) and left in a room at room temperature (16 ° C. to 20 ° C.).
(4) Reduction rate
Figure JPOXMLDOC01-appb-T000001
The mutual solubility between the HFE solvent liquid and the surface coating liquid (water) is extremely low and hardly dissolves, and the density of water is smaller than that of the HFE solvent liquid, so that the surface of the HFE solvent liquid is reliably coated. Thus, when the HFE solvent liquid is sealed with the surface coating liquid (water), the evaporation of the HFE solvent liquid is suppressed, and the evaporation amount is extremely small as compared with the case where the coating is not performed.
実験例２Experimental example 2
　(１)  ＨＦＥ溶剤液
　　　株式会社住友スリーエム　製造の
　　ノベックＨＦＥ７２００
　　分子構造　Ｃ4Ｆ7ＯＣ2Ｈ5
　　沸点　　　７６℃
　　密度　　　１.４３０ｇ／ｃｍ3
　(２)  表面被覆液
　　炭化水素系溶剤
　　炭素数１１を主成分とするノルマルパラフィン
　　沸点　　　２０７℃
　　密度　　　０．７４５ｇ／ｃｍ3
　(３)  測定方法
　　試料　３
　　ビーカーにＨＦＥ７２００を８１．１８ｇ収納し、表面被覆液を用いずに常温（１６℃～２０℃）の部屋に放置した。
　　試料　４
　　ビーカーにＨＦＥ７２００を８１．１８ｇ収納し、その表面を表面被覆液(炭化水素　系溶剤２９．５９ｇ)で被覆し常温（１６℃～２０℃）の部屋に放置した。
Figure JPOXMLDOC01-appb-T000002
試料４の減少率は、ＨＦＥ７２００と炭化水素系溶剤の合量を分母とした。

ＨＦＥ溶剤液と表面被覆液(炭化水素系溶剤)との相互溶解は多少生じるものの、炭化水素系溶剤の方がＨＦＥ溶剤液よりも密度が小さく、ＨＦＥ溶剤液の表面を確実に被覆する。この様にＨＦＥ溶剤液を表面被覆液(炭化水素系溶剤)でシールした場合、ＨＦＥ溶剤液の蒸発はおさえられ、被覆をしなかった場合と比較し蒸発量は極めて少量となる。 (1) HFE solvent liquid Novec HFE7200 manufactured by Sumitomo 3M Limited
Molecular structure C 4 F 7 OC 2 H 5
Boiling point 76 ° C
Density 1.430 g / cm 3
(2) Surface coating liquid Hydrocarbon solvent Normal paraffin mainly composed of 11 carbon atoms Boiling point 207 ℃
Density 0.745g / cm 3
(3) Measuring method Sample 3
81.18 g of HFE7200 was placed in a beaker and left in a room at room temperature (16 ° C. to 20 ° C.) without using a surface coating solution.
Sample 4
81.18 g of HFE7200 was placed in a beaker, and its surface was covered with a surface coating solution (hydrocarbon solvent 29.59 g) and left in a room at room temperature (16 ° C. to 20 ° C.).
Figure JPOXMLDOC01-appb-T000002
The reduction rate of Sample 4 was determined by using the total amount of HFE7200 and the hydrocarbon solvent as the denominator.

Although mutual dissolution of the HFE solvent liquid and the surface coating liquid (hydrocarbon solvent) occurs to some extent, the hydrocarbon solvent has a lower density than the HFE solvent liquid and reliably covers the surface of the HFE solvent liquid. In this way, when the HFE solvent liquid is sealed with the surface coating liquid (hydrocarbon solvent), the evaporation of the HFE solvent liquid is suppressed, and the evaporation amount becomes extremely small as compared with the case where the coating is not performed.
　以上の通り本発明は、ＨＦＥ溶剤液(２)の上面を、ＨＦＥ溶剤液(２)よりも比重が小さいとともに沸点が高い液体にて形成した表面被覆液(４)により被覆することにより、ＨＦＥ溶剤液(２)の蒸発消耗を発生させないか著しく減少させる事ができる。そのため、蒸気洗浄作業中でも蒸気洗浄槽(１)に貯留しているＨＦＥ溶剤液(２)の蒸発を発生する事がないか著しく減少させる事ができる。また、蒸気洗浄作業を行っていない待機中のＨＦＥ溶剤液(２)の蒸発を極めて微少とすることが可能となる。そのため、高価なＨＦＥ溶剤液(２)を用いて蒸気洗浄を行っても、ＨＦＥ溶剤液(２)の消耗を極めて小さなものとする事ができるから、ＨＦＥ溶剤液(２)を繰り返し使用する事が可能となり、結果的にはＨＦＥ溶剤(２)を用いた廉価な蒸気洗浄作業を可能とするものである。本発明は環境性能とともに洗浄性能に優れた高価なＨＦＥ溶剤を用いながら廉価な蒸気洗浄を可能にする事が出来るものである。 As described above, the present invention covers the upper surface of the HFE solvent liquid (2) with the surface coating liquid (4) formed of a liquid having a lower specific gravity and a higher boiling point than that of the HFE solvent liquid (2). Evaporation consumption of the solvent liquid (2) is not generated or can be significantly reduced. For this reason, the HFE solvent liquid (2) stored in the steam cleaning tank (1) does not evaporate or can be significantly reduced even during the steam cleaning operation. Further, it is possible to minimize the evaporation of the HFE solvent liquid (2) that is on standby without performing the steam cleaning operation. Therefore, even if steam cleaning is performed using an expensive HFE solvent liquid (2), the consumption of the HFE solvent liquid (2) can be made extremely small. Therefore, the HFE solvent liquid (2) is repeatedly used. As a result, an inexpensive steam cleaning operation using the HFE solvent (2) is possible. The present invention enables inexpensive steam cleaning while using an expensive HFE solvent which is excellent in cleaning performance as well as environmental performance.
１　蒸気洗浄槽
２　ＨＦＥ溶剤液
４　表面被覆液
５　被洗浄物
８　蒸気洗浄ゾーン
１０　蒸気発生槽
１１　開閉バルブ
  DESCRIPTION OF SYMBOLS 1 Steam cleaning tank 2 HFE solvent liquid 4 Surface coating liquid 5 Object to be cleaned 8 Steam cleaning zone 10 Steam generation tank 11 Opening and closing valve

Claims (1)

  1. 　底部に冷却したＨＦＥ溶剤液を充填し、この冷却したＨＦＥ溶剤液の表面を、ＨＦＥ溶剤液よりも比重が小さいとともに沸点が高い炭化水素系溶剤、テルペン系溶剤、シリコーン系溶剤、親水性溶剤、水、動物性油脂、植物性油脂の一種または複数種からなる液体にて形成した表面被覆液により被覆し、この表面被覆液の上面を被洗浄物の蒸気洗浄ゾーンとし、この蒸気洗浄ゾーンで被洗浄物と接触し凝縮液化したＨＦＥ溶剤液を、表面被覆液の上面に落下させる蒸気洗浄槽と、内部に充填したＨＦＥ溶剤液を加熱して洗浄蒸気を発生し、この洗浄蒸気を開閉バルブを介して蒸気洗浄槽の蒸気洗浄ゾーンに供給する蒸気洗浄槽と別個に形成した蒸気発生槽とから成ることを特徴とする被洗浄物の蒸気洗浄装置。 The bottom part is filled with a cooled HFE solvent liquid, and the surface of the cooled HFE solvent liquid is a hydrocarbon solvent having a specific gravity smaller than that of the HFE solvent liquid and having a high boiling point, a terpene solvent, a silicone solvent, a hydrophilic solvent, It is coated with a surface coating liquid formed from a liquid consisting of one or more of water, animal oils and vegetable oils, and the upper surface of the surface coating liquid is used as a vapor cleaning zone for the object to be cleaned. A steam cleaning tank that drops the HFE solvent liquid in contact with the cleaning material into a condensed liquid on the top surface of the surface coating liquid, and heats the HFE solvent liquid filled inside to generate cleaning steam. A steam cleaning apparatus for an object to be cleaned, comprising: a steam cleaning tank that is supplied to a steam cleaning zone of the steam cleaning tank through a steam generation tank formed separately.
PCT/JP2011/003732 2010-12-07 2011-06-29 Steam cleaning device for article being cleaned WO2012077254A1 (en)

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CN109454042A (en) * 2017-09-06 2019-03-12 株式会社富利美 Workpiece cleaning device and workpiece clean method
JP2020093211A (en) * 2018-12-12 2020-06-18 株式会社ワールド機工 Sealed-type washing device
JP6557796B1 (en) * 2019-02-13 2019-08-07 ジャパン・フィールド株式会社 Method of cleaning an object to be cleaned using a mixed cleaning solvent
JP2020138166A (en) * 2019-02-28 2020-09-03 セントラル硝子株式会社 Cleaning method using fluorine-containing organic solvent, preservation method of fluorine-containing organic solvent and recovery method

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