EP0747140B1 - Verfahren und Vorrichtung zum Spülen und/oder Trocknen von gewaschenen Gegenständen - Google Patents
Verfahren und Vorrichtung zum Spülen und/oder Trocknen von gewaschenen Gegenständen Download PDFInfo
- Publication number
- EP0747140B1 EP0747140B1 EP96201507A EP96201507A EP0747140B1 EP 0747140 B1 EP0747140 B1 EP 0747140B1 EP 96201507 A EP96201507 A EP 96201507A EP 96201507 A EP96201507 A EP 96201507A EP 0747140 B1 EP0747140 B1 EP 0747140B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tank
- articles
- rinsing
- valve
- rinsing liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005406 washing Methods 0.000 title claims abstract description 12
- 238000001035 drying Methods 0.000 title abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 238000009835 boiling Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims description 16
- 239000012530 fluid Substances 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 239000000428 dust Substances 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008233 hard water Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
Definitions
- the present invention generally refers to the rinsing and drying of articles that have been subjected to a washing process.
- the vapor is admitted into a cleaning chamber when a previously introduced media, e.g. a washing liquid, has been already evacuated from the chamber.
- a previously introduced media e.g. a washing liquid
- the object of the present invention is to obtain quickly and reliably dried articles that have been submitted to washing and rinsing processes, having a surfaces stainless and devoid of stains.
- an apparatus comprises at least a rinsing tank 1 adapted to contain the articles to be subjected to the washing and/or rinsing and/or drying tratments, which is designed to withstand the stresses due to pressures both higher and lower than the atmospheric pressure as well as to resist to oxidative agents.
- the tank 1 can be hermetically closed by means of a cover 2 that is manually or automatically operated.
- the apparatus comprises two of such tanks so that in one of them a lot of articles can be rinsed while in the other another lot of articles is being dried.
- the heating source 30 of the vapor generator can be one of the conventional sources, such as an electric heater, a heat exchanger, a furnace burning a liquid, solid or gasous fuel, a heat pump, a sun-powered heater, a gas compressor, etc.
- the condenser 4 comprises a container housing a coil 21 and can be selectively communicated with the tank 1 through a valve 17.
- a pumping assembly 7 comprising a pump and two valves 13 and 14, is connected to the bottom of the tank 1 through a valve 12. This pumping assembly is used for pumping the rinsing liquid into the tank 1 and for its extraction. Valve 13 communicates the assembly with a reservoir of rinsing liquid 19.
- the apparatus is preferably equipped with a storage tank 8 communicating with the tank 1 through a valve 11 and a conduit length opening in the the upper portion of the tank sidewall, for the pollutant or otherwise harmful rinsing fluids.
- the apparatus of the invention further comprises auxiliary components such as a cooling device 5 and a pump-ejector assembly 6.
- the cooling device 5 is of conventional design and comprises a cylinder-piston assembly 27, a refrigerating coil 28 and a fan 29 and communicates through a valve 21 with the cooling and condensing device 4.
- the pump-ejector assembly 6 includes an ejector 23, a pump 24 and a (second) condenser 25.
- the ejector 23 communicates with the cooling and condensing device 4, whereas a valve 18 is interposed between the second condenser 25 and the cooling device 5.
- the pump-ejector assembly 6 is used, when required, for extracting from the tank 1 the condensed fluids and possible gases that are not condensable when the tank is under vacuum conditions.
- the assembly 6 is preferably provided for ensuring the expulsion of air that might have passed through the seals.
- the apparatus of the invention comprises additional automation devices such as valves, solenoid valves, automatic hydraulic cylinders, etc. All the valves and the devices of the apparatus are controlled and operated by a central control unit, preferably provided with a PLC or a programmed microprocessor.
- a central control unit preferably provided with a PLC or a programmed microprocessor.
- the apparatus of the invention When the apparatus of the invention is arranged in an automated washing plant, its working is properly coordinated with the working of the main plant.
- a plate 22 is provided within the tank 1A, this plate being cooled by a coil 26 at programmed times, thus acting as a condenser. Both the additional plate 22 and the main condenser 4 can be used for enhancing the drying stage.
- the cooling is preferably carried out within the tank 1 in order to strongly reduce the level of harmful vapors and to generate a gas trap for retaining the vapors within the tank during the loading and unloading of the articles.
- the operating cycle is started by introducing the articles into the empty tank 1 after removing or opening the cover 2.
- the articles can be positioned in the rinsing tank 1 either manually or automatically and the tank contains supporting means or devices (not shown) accomodating the shape and types of the articles to be rinsed.
- the cover 2 is tightly sealed and the tank is filled with a rinsing liquid from the pump assembly 7 and the valve 11 is opened so that the air is expelled from the tank 1 and forced into the air storage tank 8.
- the valve 11 is closed.
- the articles are subjected to a conventional rinsing cycle as desired or requested.
- the rinsing liquid is slowly drained from the tank through the pump assembly 7 and returned to the reservoir 19.
- the drainage is slowly accomplished in such a manner that the descending liquid surface "washes" the articles located in the tank 1.
- valve 15 is opened for admitting into the tank 1 a vapor under pressure from the generator 3, the vapor occupying the vacant space left by the rinsing liquid being drained.
- the temperature of the vapor from generator 3 is higher than that of the rinsing liquid, and preferably the vapor is similar to the rinsing liquid. In all cases the vapor is not of a type capable of reacting with the rinsing liquid or causing other negative phoenomena.
- This vapor flows through the portions of the articles emerging from the surface of the liquid being drained and transfers thermal energy to the articles. Since the emerging portions of the articles are initially at the same temperature of the rinsing liquid (i.e. colder than the incoming vapor), the vapor condensates over the emerging portions of the articles and the droplets run down the article surfaces with an additional rinsing or microwashing of said surfaces.
- This process takes place in a continuous manner on the surfaces that progressively emerge from the liquid.
- the incoming hot vapor raises the temperature of the article surfaces so that their temperature tends to equal that of the incoming vapor.
- valve 15 is then closed thus stopping the admission of the vapor, and by opening tha valve 17 the tank 1, now emptied of any liquid, is communicated with the cooling and condensing device (condenser) 4, schematically represented in Fig. 1 by a tank housing a coil 21 in which a refrigerator flows.
- the vapor from the tank 1 progressively expands in the condenser 4 and the condensated vapor is collected within the tank, thus creating a vacuum within the tank 1. Since the articles are at a suitable temperature and are covered by a liquid film, the vacuum causes the boiling of the liquid film.
- the thermal content of the articles can be enough to continue the boiling process until the complete vaporization of the liquid covering the articles, also thanks to the degree of the vacuum produced.
- the above sequence of operations is correspondently shortened. More particularly, the articles are arranged within the tank 1 and the cover 2 is airtigh closed. Then the tank 1 is communicated with the storage tank 8 by opening the valve 11 so that the air within the tank 1 can migrate into tank 8, and the valve 15 towards the vapor generator 3 is opened. Then the valve 11 in the conduit communicating the tank 1 with the tank 8 is closed, while maintaning open the valve 15 that allows the admission into the tank 1 of vapor that heats the articles.
- the whole liquid film covering the articles has been evaporated, that is if the thermal energy stored by the articles is large enough.
- the cycle is repeated.
- the invention accomplishes the following advantages over the prior art apparatuses and processes.
- the process is ecological in that the emission of pollutants into the environment is null or negligible, as a function of the type of fluid that is used.
- the apparatus works with any type of fluid or other substance that is evaporable at a pressure lower or higher than the atmospheric pressure.
- the process of the invention can replace the whole washing cycle, while maintaining unaltered the working principle.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Drying Of Solid Materials (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Detergent Compositions (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Cleaning In General (AREA)
- Manufacturing Of Printed Wiring (AREA)
Claims (11)
- Verfahren zum Spülen von Gegenständen mit den Schrittendadurch gekennzeichnet,a) Positionieren der zu behandelnden Gegenstände in einem Behälter (1) und hermetisches Verschliessen des Behälters (1),b) Füllen des Behälters (1) mit einer Spülflüssigkeit, während gleichzeitig in dem Behälter (1) vorhandene Luft verdrängt wird,c) langsames Abfliessenlassen der Spülflüssigkeit aus dem Behälter (1),d) Zugeben eines Stroms von heissem Dampf in den Behälter (1) mit einer Temperatur, die höher ist als die der Spülflüssigkeit in den Behälter (1),e) Aufrechterhalten des Stroms des heissen Dampfs nach dem vollständigen Abfliessenlassen der Spülflüssigkeit und bis die Gegenstände eine gegebene Menge thermischer Energie speichern,f) Anhalten des Stroms von heissem Dampf und Erzeugen eines Vakuums in dem Behälter (1), um ein Sieden des die Gegenstände bedeckenden Flüssigkeitsfilms herbeizuführen, bis sie vollständig trocken sind,g) Öffnen des Behälters (1) und Entfemen der gespülten und getrockneten Gegenstände,dass Schritt c) und d) gleichzeitig ausgeführt werden, so dass der Dampf über den Oberflächen der Gegenstände kondensiert, während sie fortschreitend aus der absinkenden Spülflüssigkeit auftauchen, wodurch ein zusätzliches Waschen durch das Abtropfen des die Gegenstände bedeckenden Flüssigkeitsfilms erreicht wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Vakuum durch Verbinden des Behälters (1) mit einer kühlenden und kondensierenden Vorrichtung (4) erzeugt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Vakuum durch Kühlen einer Oberfläche (22) erzeugt wird, die in dem Behälter (1A) angeordnet ist.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Gegenstände in dem Spülbehälter (1) am Anfang durch die Spülflüssigkeit gekühlt werden, so dass, wenn die Spülflüssigkeit langsam abfliessen gelassen wird, die auftauchenden Teile der Gegenstände als Kondensationskörper für den hereinkommenden heissen Dampf wirken und von einem Flüssigkeitsfilm bedeckt werden, der an den Gegenstandsoberflächen nach unten tropft, wodurch ein Mikrowaschen dieser Oberflächen erreicht wird.
- Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1dadurch gekennzeichnet, dass die Vorrichtung weiterhinmit wenigstens einem hermetisch mittels eines Deckels (2) verschliessbaren Spülbehälter (1) für die Aufnahme der Gegenstände,mit einem Dampferzeuger (3), der mit dem Behälter (1) über ein erstes Ventil (15) verbunden ist,mit einer Pumpanordnung (7), die mit dem Behälter (1) über ein zweites Ventil (12) zum Pumpen der Spülflüssigkeit in den Behälter (1) und zum Abziehen der Spülflüssigkeit aus ihm verbunden ist, undmit einer kühlenden und kondensierenden Vorrichtung (4) für den Dampf, die mit dem Behälter (1) über ein drittes Ventil (17) verbunden ist,eine zentrale Steuereinheit für die Steuerung und Ausführung der Zugabe von heissem Dampf in den Behälter (1) durch das erste Ventil (15) und gleichzeitig für die Freigabe des zweiten Ventils (12) zum Abfliessenlassen der Spülflüssigkeit aus dem Behälter (1) durch das zweite Ventil (12).
- Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Steuer- und Betriebseinrichtung einen PLC oder einen programmierten Mikroprozessor aufweist.
- Vorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass sie weiterhin einen mit dem Behälter (1) über ein viertes Ventil (11) in Verbindung stehenden Speicherbehälter (8) zum Speichern der aus dem Behälter (1) verdrängten Luft aufweist, wenn das Spülfluid verunreinigend oder schädlich ist.
- Vorrichtung nach Anspruch 5 bis 7, dadurch gekennzeichnet, dass sie weiterhin eine Kühlvorrichtung (5) mit einer Zylinder-Kolben-Anordnung (27), einer Kühlschlange (28) und einem Gebläse (29) aufweist und über ein fünftes Ventil (21) mit der kühlenden und kondensierenden Vorrichtung (4) in Verbindung steht.
- Vorrichtung nach den Ansprüchen 5 bis 8, dadurch gekennzeichnet, dass sie weiterhin eine Saugstrahlpumpenanordnung (6) zum Abziehen kondensierter Fluide und Gase aus dem Tank (1) aufweist, die nicht kondensiert sind, wenn sich der Behälter im Vakuumzustand befindet, wobei die Saugstrahlpumpanordnung (6) einen Strahlsauger (23), eine Pumpe (24) und einen zweiten Kondensator (25) aufweist, der Strahlsauger (23) mit der kühlenden und kondensierenden Vorrichtung (4) in Verbindung steht und ein sechstes Ventil (18) zwischen dem zweiten Kondensator (25) und der Kühlvorrichtung (5) angeordnet ist.
- Vorrichtung nach den Ansprüchen 5 bis 9, dadurch gekennzeichnet, dass in dem Behälter (1A) eine Platte (22) vorgesehen ist, die von einer Schlange (26) gekühlt werden kann.
- Vorrichtung nach den Ansprüchen 5 bis 10, dadurch gekennzeichnet, dass sie zwei Spülbehälter aufweist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT95PD000113A IT1281893B1 (it) | 1995-06-06 | 1995-06-06 | Procedimento per il risciacquo e/o l'asciugatura in ambiente pressurizzato di oggetti in precedenza lavati, ed impianto per |
| ITPD950113 | 1995-06-06 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0747140A2 EP0747140A2 (de) | 1996-12-11 |
| EP0747140A3 EP0747140A3 (de) | 1997-10-15 |
| EP0747140B1 true EP0747140B1 (de) | 2001-10-24 |
Family
ID=11391073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96201507A Expired - Lifetime EP0747140B1 (de) | 1995-06-06 | 1996-05-30 | Verfahren und Vorrichtung zum Spülen und/oder Trocknen von gewaschenen Gegenständen |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0747140B1 (de) |
| AT (1) | ATE207391T1 (de) |
| DE (1) | DE69616154T2 (de) |
| ES (1) | ES2166423T3 (de) |
| IT (1) | IT1281893B1 (de) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0221028A1 (de) * | 1985-10-24 | 1987-05-06 | ECOLSIR S.r.l. | Verfahren zur Entseuchung von Vorrichtungen oder anderen Stoffen, vergiftet durch PCB oder andere Gift- und Schadstoffe |
| EP0642845A1 (de) * | 1993-08-13 | 1995-03-15 | BRANSON ULTRASCHALL Niederlassung der EMERSON TECHNOLOGIES GmbH & CO. | Gerät zum Reinigen, Spülen und Trocknen von Werkstücken |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5180438A (en) * | 1989-10-11 | 1993-01-19 | Hockh Metall-Reinigungsanlagen Gmbh | Cleaning and drying system |
| JPH0757913B2 (ja) * | 1989-10-27 | 1995-06-21 | オリエンタルエンヂニアリング株式会社 | 脱脂洗浄方法および装置 |
| JP3393389B2 (ja) * | 1992-10-30 | 2003-04-07 | 株式会社日本ヘイズ | 真空脱脂洗浄方法と真空洗浄機 |
| US5454390A (en) * | 1994-05-16 | 1995-10-03 | International Business Machines Corporation | Vapor rinse-vapor dry process tool |
-
1995
- 1995-06-06 IT IT95PD000113A patent/IT1281893B1/it active IP Right Grant
-
1996
- 1996-05-30 EP EP96201507A patent/EP0747140B1/de not_active Expired - Lifetime
- 1996-05-30 ES ES96201507T patent/ES2166423T3/es not_active Expired - Lifetime
- 1996-05-30 DE DE69616154T patent/DE69616154T2/de not_active Expired - Lifetime
- 1996-05-30 AT AT96201507T patent/ATE207391T1/de active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0221028A1 (de) * | 1985-10-24 | 1987-05-06 | ECOLSIR S.r.l. | Verfahren zur Entseuchung von Vorrichtungen oder anderen Stoffen, vergiftet durch PCB oder andere Gift- und Schadstoffe |
| EP0642845A1 (de) * | 1993-08-13 | 1995-03-15 | BRANSON ULTRASCHALL Niederlassung der EMERSON TECHNOLOGIES GmbH & CO. | Gerät zum Reinigen, Spülen und Trocknen von Werkstücken |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69616154T2 (de) | 2002-07-04 |
| EP0747140A2 (de) | 1996-12-11 |
| DE69616154D1 (de) | 2001-11-29 |
| ITPD950113A0 (it) | 1995-06-06 |
| ITPD950113A1 (it) | 1996-12-06 |
| ES2166423T3 (es) | 2002-04-16 |
| ATE207391T1 (de) | 2001-11-15 |
| EP0747140A3 (de) | 1997-10-15 |
| IT1281893B1 (it) | 1998-03-03 |
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