EP0934497B1 - Procede et dispositif pour secher des couches minces - Google Patents

Procede et dispositif pour secher des couches minces Download PDF

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Publication number
EP0934497B1
EP0934497B1 EP97945828A EP97945828A EP0934497B1 EP 0934497 B1 EP0934497 B1 EP 0934497B1 EP 97945828 A EP97945828 A EP 97945828A EP 97945828 A EP97945828 A EP 97945828A EP 0934497 B1 EP0934497 B1 EP 0934497B1
Authority
EP
European Patent Office
Prior art keywords
air
drying
housing
dry air
cooling
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
Application number
EP97945828A
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German (de)
English (en)
Other versions
EP0934497A1 (fr
Inventor
Dietmar Gath
Claus Hellmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hellmann-Hygrex Luft- und Klimatechnik GmbH
Original Assignee
Hellmann-Hygrex Luft- und Klimatechnik GmbH
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Application filed by Hellmann-Hygrex Luft- und Klimatechnik GmbH filed Critical Hellmann-Hygrex Luft- und Klimatechnik GmbH
Publication of EP0934497A1 publication Critical patent/EP0934497A1/fr
Application granted granted Critical
Publication of EP0934497B1 publication Critical patent/EP0934497B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08—Humidity
    • F26B21/086—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/12—Vehicle bodies, e.g. after being painted

Definitions

  • the invention relates to a method for drying thin layers based on water, solvent or alcohol, which were applied to objects by spraying, dipping or brushing, and an apparatus for carrying out the method.
  • the materials described are used for coating a wide variety of objects, for example for coating and painting auto parts, machine components, metal sheets and the like.
  • the coatings applied and then dried are applied and then dried.
  • Drying takes place according to the state of the art either by infrared radiation or by warm Air is passed over the coated objects, so that drying is done by heat convection. After this There are also combined methods in the prior art, wherein the coated objects simultaneously warm air and be exposed to additional infrared radiation.
  • the workpieces are heated to 60 ° C to 120 ° C, to the moisture contained in the thin layer evaporate. This causes considerable temperature loads on the components and partly thermal chemical Implementations on.
  • Another major disadvantage is skin formation over still damp base layers when painting over warm air and the heating of the workpieces to high temperatures.
  • the prior art also belongs a method and a device for fully automatic Drying cleaned items. According to this method works with drying air, which has a temperature range of 40 ° C to 80 ° C. As already stated several times, this high temperature range of considerable disadvantage.
  • the technical problem underlying the invention consists of a drying process as well as a device to carry out the procedure whereby the Drying time is significantly reduced, which is a significant there is less energy consumption, and that is also applicable to heat sensitive parts.
  • the dry air By using air to dry the has a relative humidity between 0% and 30%, preferably a relative humidity of approx. 10% (dry Air), and in that the dry air over and / or around the workpiece to be dried is taken, the dry air the moisture of the applied on the workpiece Thin film on. Because the workpiece is constantly dry air is supplied, is always approximate maintain equal vapor pressure difference, whereby the evaporation of moisture on the workpiece surface is accelerated. The moisture coming out in vapor form is immediately absorbed by the ambient air. According to the The inventive method is the temperature of the air by means of an additional cooling device with an in Circulating refrigerant and through a subsequent Warming at a low temperature level kept from 15 ° C to 60 ° C.
  • moisture air that is air with a relative humidity of more than 40%, in a dry air unit obtained by condensation.
  • the air is warmed up again Moisture absorption fed to the paint.
  • the dry air takes away the moisture of the thin layer on the workpieces.
  • the workpieces are themselves in one housing.
  • the housing can be used as a cabinet Recording of the workpieces can be formed, for example large workpieces, such as lower parts of buses or the like, to be ordered.
  • the Air is then heated again and the one to be dried Workpieces fed again.
  • the drying process according to the invention is a closed one System in which there is no exhaust air. This has the advantage that no odorants, no moisture and no heat is transported outside.
  • the heat generated when the air is dehumidified is used for reheating the air after dehumidifying used.
  • the housings intended for drying are the Adjusted conditions of the individual case.
  • Vehicle underbodies are dried by buses an appropriate dryer tunnel is required through which the entire underbody of a bus can be driven through can.
  • an appropriate dryer tunnel is required through which the entire underbody of a bus can be driven through can.
  • railway and car models can be provided a kind of drawer system in which each model is arranged individually. The dry air is here through the individual drawers of the Drawer system directed.
  • the inventive method has the advantage that much less time is required for drying is as with the methods belonging to the prior art.
  • the Drying process depending on the material and surface, between three and ten minutes.
  • the time spent can range from twelve to fifteen minutes increase. This is because the dry air is cracked and recesses can not penetrate so well, so that in These cracks and recesses are exposed to air that is filled with liquid is saturated, so that the drying process stagnates.
  • the time for air drying is at about three to four minutes.
  • the time for that Air drying depends on the type of coating liquid used.
  • Another advantage of the method according to the invention is that only 10% to 25% of the energy required for the stand the method belonging to the technology is required.
  • Fig. 1 The embodiment shown in Fig. 1 is for the invention is not claimed, but it is for the in Fig. 2 shown device relevant.
  • Fig. 1 shows a device (1) with a drainage device (2) for a water-based paint layer, through the humid air (3).
  • the humid air (3) is in the dewatering device (2) Condensation drains so that the air has a vapor partial pressure from 0 to 16 mbar.
  • the condensate (12) is collected in a basin (4).
  • the condensed Air (5) is passed through a heater (17) and by means of a fan (7) in the direction of arrow (A) in an area (8) of the device (1) directed.
  • the dry one Air sweeps through circulation over workpieces (9), which are coated and should be dried.
  • the dry air takes the moisture out of the paint on, so that the air in area (10) in turn a higher has relative humidity.
  • the air has a temperature of 15 ° C. in area (8) up to 60 ° C.
  • the workpieces (9) are painted over not with the dry air heated to 15 ° C to 60 ° C significantly heated because the evaporative cooling Surface of the workpieces (9) remains cold.
  • the device (1) forms a closed cycle for the circulating air.
  • the device (1) can also have an open circuit be driven.
  • the device (1) be designed as a continuous system with open passage openings for the parts to be dried.
  • the device (1) has a housing (11) in which the process of dehydrating the air, heating the dry Air, drying the workpieces and returning the moist air to the drainage device (2) in a closed Cycle is carried out.
  • the device works in the same way for the Drying of any kind of thin layers, be it on water, Alcohol or other solvent based, but also when using grease or glue and the like.
  • the drying device (1) in a preferred embodiment of the invention an additional Cooling device (13).
  • the additional cooling device (13) becomes a circulating refrigerant, with which the drainage device (2) operated is cooled. This is necessary to get a low one To maintain the temperature level of the drainage device (2).
  • the moist air (3) is in the drainage device (2) dewatered by condensation, so this will the refrigerant with which the drainage device (2) is operated, heated.
  • the warmed refrigerant arrives from the dewatering device (2) into a compressor (14).
  • the refrigerant is in the compressor (14) compresses, causing the refrigerant to heat up. This further heating is based essentially on the heat of compression.
  • the compressed comes out of the compressor (14) Refrigerant in the refrigerant condenser (6).
  • the heated refrigerant is in the refrigerant condenser (6) the dry air (5) to a predetermined temperature heated to this heated air then in area (8) to dry the workpieces (9).
  • the refrigerant is pre-cooled.
  • the pre-cooled refrigerant then passes into another refrigerant condenser (15).
  • the pre-cooled is in the refrigerant condenser (15)
  • Refrigerant with the help of circulating air, which by means of a Fan (16) from the vicinity of the drying device (1) is removed, cooled further.
  • the air circulation has essentially room temperature.
  • the refrigerant used in the refrigeration cycle is always cooled, such that a drainage of the circulating air in the drainage device (2) is optimally executable.
  • the housing (11) Drying device (1) As the temperature of the dry air (5), which leads to Drying of the workpieces (9) in the area (8) is used, is approximately 15 ° C to 60 ° C, the housing (11) Drying device (1) as a non-thermally insulated housing be trained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (12)

  1. Procédé de séchage de couches minces, qui sont déposées sur une pièce d'oeuvre, l'air doté d'une humidité située entre 0 et 10 grammes de charge de pression par mètre cube (air sec) étant dirigé sur ou autour de la pièce d'oeuvre à sécher (9), l'air pour le séchage présentant une température située entre 15°C et 60°C et la température de l'air étant maintenue à ce faible niveau par refroidissement, au moyen d'un dispositif de refroidissement supplémentaire (13) muni d'un caloporteur circulant dans le circuit, et par un réchauffement consécutif.
  2. Procédé selon la revendication 1, caractérisé en ce que les couches minces sont des couches de graisse, des couches de colle ou similaire, notamment des couches de couleur ou de laque ou similaire à base d'eau, d'alcool ou de solvants.
  3. Procédé selon la revendication 1, caractérisé en ce que l'humidité de l'air sec présente une pression partielle de vapeur allant de 0 à 16 mbars.
  4. Procédé selon la revendication 1, caractérisé en ce que l'air sec est produit par refroidissement et condensation de l'humidité.
  5. Procédé selon la revendication 1, caractérisé en ce que l'on utilise la chaleur émise éventuellement lors de la production de l'air sec par condensation pour réchauffer ultérieurement l'air sec refroidi de 15°C à 60°C.
  6. Procédé selon la revendication 1, caractérisé en ce que l'air circule dans un circuit fermé ou ouvert de telle manière que le refroidissement de l'air se produise dans un condenseur de refroidissement.
  7. Procédé selon la revendication 6, caractérisé en ce que la condensation des liquides évaporés des couches à sécher sur les tubes surrefroidis se produit entre 0°C et -20°C.
  8. Dispositif pour sécher des couches mines, qui sont déposées sur une pièce d'oeuvre, selon le procédé de la revendication 1, caractérisé en ce que,
    a) le dispositif (1) présente un dispositif de refroidissement (2) doté d'un caloporteur circulant dans le circuit pour condenser et un dispositif de chauffage (17) pour réchauffer l'air environnant,
    b) un logement (11) pour recevoir les pièces d'oeuvre à sécher (9) est prévu, le logement (11) étant conçu sous la forme d'un logement non isolé thermiquement, et
    c) au moins un ventilateur (7) est prévu dans le dispositif (1) pour la circulation de l'air.
  9. Dispositif selon la revendication 8, caractérisé en ce que le logement (11) est ouvert ou fermé.
  10. Dispositif selon la revendication 8, caractérisé en ce que le logement (11) présente la forme d'un tunnel.
  11. Dispositif selon la revendication 8, caractérisé en ce que le logement présente la forme d'un système à tiroirs.
  12. Dispositif selon la revendication 8, caractérisé en ce que le dispositif (1) présente la forme d'un dispositif contenant de l'air en circuit fermé.
EP97945828A 1996-10-28 1997-10-14 Procede et dispositif pour secher des couches minces Expired - Lifetime EP0934497B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19644717A DE19644717A1 (de) 1996-10-28 1996-10-28 Verfahren zum Trocknen von dünnen Schichten sowie Vorrichtung zur Durchführung des Verfahrens
DE19644717 1996-10-28
PCT/EP1997/005650 WO1998019124A1 (fr) 1996-10-28 1997-10-14 Procede et dispositif pour secher des couches minces

Publications (2)

Publication Number Publication Date
EP0934497A1 EP0934497A1 (fr) 1999-08-11
EP0934497B1 true EP0934497B1 (fr) 2002-08-07

Family

ID=7810187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97945828A Expired - Lifetime EP0934497B1 (fr) 1996-10-28 1997-10-14 Procede et dispositif pour secher des couches minces

Country Status (8)

Country Link
EP (1) EP0934497B1 (fr)
AT (1) ATE221981T1 (fr)
AU (1) AU5118998A (fr)
CA (1) CA2269982A1 (fr)
DE (3) DE19644717A1 (fr)
DK (1) DK0934497T3 (fr)
ES (1) ES2182123T3 (fr)
WO (1) WO1998019124A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19756194B4 (de) * 1997-12-17 2006-06-08 Keld Gabelgaard Lackverarbeitungsvorrichtung und -verfahren
DE10030383C1 (de) 2000-06-21 2001-10-04 Daimler Chrysler Ag Verfahren und Vorrichtung zum nicht-thermischen Trocknen von mit einem Wasserbasislack frisch lackierten Gegenständen, insbesondere Kraftfahrzeugkarosserien
DE10128794B4 (de) * 2001-06-15 2005-02-17 Rehau Ag + Co. Verfahren und Einrichtung zum Trocknen
US20100293807A1 (en) * 2007-10-29 2010-11-25 Transpharma Medical, Ltd. Vertical patch drying
WO2009073937A1 (fr) 2007-12-10 2009-06-18 Vilani Oliveira Junior Jose Unité de déshumidification ou de déshydratation utilisable en apiculture
DE102015224916A1 (de) * 2015-12-10 2017-06-14 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
CN106270380B (zh) * 2016-08-16 2018-04-20 东风汽车有限公司 一种泡沫塑料模型烘房
JP6428750B2 (ja) * 2016-11-30 2018-11-28 マツダ株式会社 塗装乾燥方法及びその装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2366363A1 (fr) * 1975-06-19 1978-04-28 Cominter Sa Procede de sechage des cuirs et peaux et installation permettant sa mise en oeuvre
US4365480A (en) * 1978-09-05 1982-12-28 United Air Specialists, Inc. Process gas treating apparatus
EP0044898A1 (fr) * 1980-07-30 1982-02-03 C.C.E. s.r.l. Commissionaria Costruzioni Elettroniche Procédé et dispositif pour le séchage rapide, en particulier de peaux
DE3229903A1 (de) * 1982-08-11 1984-02-16 Mohndruck Graphische Betriebe GmbH, 4830 Gütersloh Verfahren und vorrichtung zum aufbereiten eines zum trocknen von loesungsmittelhaltigen farben, lacken, klebern oder dergleichen auf papier oder vergleichbaren zelluloseprodukten verwendeten trocknungsmediums
DE3637737A1 (de) * 1986-11-05 1988-05-19 Waldner Gmbh & Co Hermann Trockner, insbesondere fuer die chemische industrie
DE3734994A1 (de) * 1987-07-31 1989-02-09 Guenther Zippel Maschf Verfahren und einrichtung zum vollautomatischen trocknen von gereinigten gegenstaenden
US5343632A (en) * 1992-04-10 1994-09-06 Advanced Dryer Systems, Inc. Closed-loop drying process and system
DE9401195U1 (de) * 1994-01-25 1994-03-31 Bartel, Walter, 78054 Villingen-Schwenningen Sieb-Trockenschrank
DE29504040U1 (de) * 1995-03-10 1996-04-04 Harter Oberflächen- und Umwelttechnik GmbH, 88161 Lindenberg Industrietrockner mit verbessertem Wirkungsgrad

Also Published As

Publication number Publication date
ATE221981T1 (de) 2002-08-15
WO1998019124A1 (fr) 1998-05-07
CA2269982A1 (fr) 1998-05-07
DE59707933D1 (de) 2002-09-12
EP0934497A1 (fr) 1999-08-11
DK0934497T3 (da) 2002-10-07
DE19781220C1 (de) 2000-04-13
AU5118998A (en) 1998-05-22
ES2182123T3 (es) 2003-03-01
DE19644717A1 (de) 1998-04-30

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