WO1981000448A1 - Procede d'alimentation en energie calorifique d'une chambre de sechage et chambre de sechage pour l'application de ce procede - Google Patents

Procede d'alimentation en energie calorifique d'une chambre de sechage et chambre de sechage pour l'application de ce procede Download PDF

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Publication number
WO1981000448A1
WO1981000448A1 PCT/SE1980/000198 SE8000198W WO8100448A1 WO 1981000448 A1 WO1981000448 A1 WO 1981000448A1 SE 8000198 W SE8000198 W SE 8000198W WO 8100448 A1 WO8100448 A1 WO 8100448A1
Authority
WO
WIPO (PCT)
Prior art keywords
drying
room
air
drying room
hot air
Prior art date
Application number
PCT/SE1980/000198
Other languages
English (en)
Inventor
A Karlsson
Original Assignee
A Karlsson
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by A Karlsson filed Critical A Karlsson
Publication of WO1981000448A1 publication Critical patent/WO1981000448A1/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
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/283—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems

Definitions

  • the present invention relates to drying rooms such as are used for drying different objects and especially to such rooms used for drying a coating of paint or lacquer on an object such as an automobile.
  • the room is provided with means for regulating the heating in the room and for regulatable ventilation thereof.
  • heating is customarily achieved by the use of electrical radiant heaters or by passing a hot air current through the roam, .
  • The, electrical heaters cause heating which is too intense in some cases and can result, inter alia, in blisters in the paint and other deterioration of the quality, while the method using the hot air current signifies the risk of dust and other solid particles swirling up and depositing themselves in the paint coating. In both cases, large amounts of energy are consumed to generate the necessary heat.
  • the object of the present invention is to provide a method of supplying heat to the drying room in question with the aid of simple and cheap apparatus making it possible to carry out heating of the air in the room and the object therein, so that heating takes place gently while at the same time the power requirement and energy consumption will be less than in drying rooms known up to now.
  • heating and drying takes place in two phases.
  • a substantially definite quantity of air is circulated in a closed and endless system of pipes ,which consist of heat-conductive material, such as relatively thin metal sheet.
  • the pipes are disposed along the walls in the room and possibly also in the ceiling thereof.
  • a preheater for the air e.g. one working with electrical heating elements, and a fan are coupled into the piping system.
  • the outsides of the air e.g. one working with electrical heating elements, and a fan are coupled into the piping system.
  • OMPI pipes are kept heated at a predetermined temperature thereb providing relatively uniformly distributed heating by conve tion and radiation in the drying room. Since the heating ai circulating in the piping is recirculated during the whole of this first drying phase, the power requirement and energ consumption will be considerably lower than what has so far been possible in drying rooms of the kind in question. Duri this phase, drying takes place relatively slowly- in a relatively low temperature in comparison to known methods. This is however an advantage, since a slower evaporation of the solvent from the paint or lacquer coating at the beginn of drying gives a better final result, inter alia with less risk of blister formation.
  • the second. drying phase is coupled in to provide the recommended dryin temperature for the paint or lacquer coating, this temperatu being usually considerably higher than the temperature pre ⁇ vailing during the first drying phase.
  • This second phase is equal to the first phase but with the addition that the heating air in the piping system is led off and blown out into the room at one or more places along the piping system
  • the piping system is provided with openabl valves and adjustable nozzles, so that the respective hot a current can be directed towards a desired area of the objec
  • the amount of hot ai led off is thus relatively small.
  • the air preheater works with electrical heating elements, the heater is heat-insulated on all sides apart from its upper side. By allowing the incoming fresh air to flow over the hot upper side of the heater, preheating of the fresh air is obtained which further improves the heating economy of the drying room.
  • the fan is usually driven by an electric motor which • is aircooled, and by leading this cooling air through the electric motor and•subsequently into the piping system at . the fan on its suction side, further preheated fresh air is supplied which improves heating economy.
  • Fig. 1 is a section along the line 1-1 in Fig. 2 and illustrates the drying room in accordance with the invention.
  • Fig. 2 is a section along the line 2-2 in Fig. 1
  • Fig. 3 is a side view of the air preheater and the fan seen according to the view 3-3 in Fig. 1.
  • the drying room has a floor 10, four walls 11,12,13,14 and a ceiling 15.
  • the wall 13 has a door 13a as indicated by chain-dotted lines.
  • a unit 16 Up against the ceiling there is a unit 16 with a fan known per se and a filter for blowing a current of fresh a through an inlet in the ceiling into the drying room and providing a downwardly directed air current to an outlet 16 at the floor of the room.
  • This air current is conventional coupled in during spraying paint or lacquer on the object which is placed on the floor or on some other substructure in the room.
  • a fan 17 outside the room which is driven by an electric motor 18 and blows air through a conventional . preheater 19 ' with, electrical heating elements.
  • the preheate is heat-insulated on all sides apart from its upper side 19 which will thus be hot during operation and give off heat t the space under a fresh air inlet in the form of * a hopper ⁇ like induction cowl 20 the lower edge of which is free fro the upper side of the preheater to obtain an induction gap
  • the cowl 20 is connected to the suction side of the fa 17 via an inlet pipe 22 containing a flap valve 23. nd a filter ' 24.
  • the fresh air supplied to the fan will thus be considerably preheated due to the flow over the heated uppe side of the preheater.
  • the pipe 22 is connected to a closed and endless syste 25 of pipes comprising relatively thin and heat-conductive sheet piping.
  • the fan 17 and air preheater 19. are a part of this closed piping syste so that when the flap valve 23 is closed, a predetermined quantity of air will be circulated round in the piping syst and be heated by the preheater to the desired temperature, which is regulated by a conventional thermostat controlling the preheater.
  • the piping system extends from the air preheater with an upper pipe part 26 into the drying room and along the walls 11,12 to a union box 27 and from this box with a lowe pipe part 28 back again along the walls 12,11,14 to a union box 29 and with an upper pipe part 30 from this box back ____ again along the wall 14 and out through the wall 14 at a place in the vicinity of the fan 17 for being connected to the suction side of the fan via a pipe part 31.
  • the pipe 22 is connected to this part 31 of the piping system, as is illustrated in Fig. 1.
  • the cooling air ducts in the electric motor 18 are connected to the suction side of the fan 17, resulting in that after the cooling air has been heated in the electric motor, this air will be sucked into the fan and supply a certain quantity of heat to the circulating heating air in the piping system.
  • the .fresh,air fan is switched o f in the unit 16. Since the drying room is now practically entirely closed off by the door 13a being closed, the air in the drying room and thereby the paint coating will be heated up "with the aid of the heated piping system which gives off heat via convec ⁇ tion and radiation. When painting cars, the temperature in the chamber will be in the order of magnitude of about 30 C. The paint coat will now be dried in this way in a first drying phase for driving off the greater part of the solvent in the paint. This drying takes place more slowly than it has done so far with electrical radiation heaters or hot air currents.
  • the second drying phase is coupled in to increase the dryi temperature to the recommended temperature for the paint o lacquer being used. This temperature is ' in the area of abo 60 C for certain automobile paints.
  • This second drying phase is carried out with the help of a plurality of openable valves with nozzles 32,33,34 distributed along the pipe sections in the piping system 25 as is illustrated in Figs. 1 and 2.
  • the piping system a comprises pipe sections in the ceiling of the drying room, these sections are also provided with valves and nozzles f blowing down hot air against the object in the drying room.
  • the schematically indicated nozzles 32,33,34 are suit- • ably adjustable for directing the hot air currents. They ar moreover suitably provided with telescopically extendable pipes, so that the nozzles can be placed at a desired distance from the surface of the object worked on.
  • the drying room in accordance with the invention can to advantage be incorporated in a production line, where the object passes into the room at one end and out of it at the other end, in which case the room can be divided into two zones, the first zone being adapted for carrying out the first drying phase, and the second zone adapted for carrying out the second drying phase.
  • the invention has been described above in connection with drying paints and lacquers, the principle being that drying is first carried out at a relatively low temperature in a relatively undisturbed atmosphere, thereafter increasing the temperature substantially by continuing drying with the aid of hot air currents.
  • this method can also be utilized within other areas, e.g. for curing plastics in the plastics industry.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Sustainable Development (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)
  • Coating Apparatus (AREA)

Abstract

Dans une chambre de sechage, specialement pour la peinture des automobiles, un systeme de conduite sans fin (25) est prevu au travers duquel circule une quantite d'air predeterminee et ce systeme est chauffe au moyen d'un prechauffeur (19). Les conduites chauffees degagent de la chaleur dans la chambre par convexion et radiation pour secher la peinture dans une premiere phase de sechage. Dans une seconde phase de sechage, l'air chaud s'echappe en plusieurs endroits le long du systeme de conduite pour augmenter la temperature de sechage et pour ventiler la chambre.
PCT/SE1980/000198 1979-08-09 1980-07-31 Procede d'alimentation en energie calorifique d'une chambre de sechage et chambre de sechage pour l'application de ce procede WO1981000448A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7906694 1979-08-09
SE7906694A SE417639B (sv) 1979-08-09 1979-08-09 Torkanleggning, serskilt for torkning av billacker eller herdning av plaster

Publications (1)

Publication Number Publication Date
WO1981000448A1 true WO1981000448A1 (fr) 1981-02-19

Family

ID=20338600

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1980/000198 WO1981000448A1 (fr) 1979-08-09 1980-07-31 Procede d'alimentation en energie calorifique d'une chambre de sechage et chambre de sechage pour l'application de ce procede

Country Status (3)

Country Link
EP (1) EP0033737A1 (fr)
SE (1) SE417639B (fr)
WO (1) WO1981000448A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0568179A1 (fr) * 1992-04-30 1993-11-03 Imperial Chemical Industries Plc Enceinte à vernir et procédé pour pousser l'évaporation du diluant d'un revêtement sur une surface de panneau
EP0706021A1 (fr) * 1994-10-08 1996-04-10 Dürr GmbH Séchoir pour une installation de peinture
EP0794012A1 (fr) * 1995-10-04 1997-09-10 Taikisha, Ltd. Etuve de sechage de peinture
EP0803296A1 (fr) * 1995-10-03 1997-10-29 Taikisha, Ltd. Etuve de sechage de peinture
NL1034696C2 (nl) * 2007-11-14 2009-05-15 Allco Equipment Bvba Oven voor het poedercoaten van producten.
CN103673543A (zh) * 2013-11-29 2014-03-26 大连华根机械有限公司 带调风阀式烘干箱
KR102098165B1 (ko) * 2019-12-31 2020-04-07 문장묵 절연저항 측정이 가능한 스테이터 자동 건조시스템
WO2023227162A1 (fr) * 2022-05-24 2023-11-30 Dürr Systems Ag Installation de traitement et procédé de traitement de pièces

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1595928A (en) * 1924-12-23 1926-08-10 Proctor & Schwartz Inc Drier
SE330673B (fr) * 1969-03-31 1970-11-23 Svenska Flaektfabriken Ab
US3673703A (en) * 1970-01-22 1972-07-04 Keller C Shrink-wrap film heating apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1595928A (en) * 1924-12-23 1926-08-10 Proctor & Schwartz Inc Drier
SE330673B (fr) * 1969-03-31 1970-11-23 Svenska Flaektfabriken Ab
US3673703A (en) * 1970-01-22 1972-07-04 Keller C Shrink-wrap film heating apparatus

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0568179A1 (fr) * 1992-04-30 1993-11-03 Imperial Chemical Industries Plc Enceinte à vernir et procédé pour pousser l'évaporation du diluant d'un revêtement sur une surface de panneau
EP0706021A1 (fr) * 1994-10-08 1996-04-10 Dürr GmbH Séchoir pour une installation de peinture
US5661912A (en) * 1994-10-08 1997-09-02 Durr Gmbh Drier for a painting plant
EP0803296A1 (fr) * 1995-10-03 1997-10-29 Taikisha, Ltd. Etuve de sechage de peinture
EP0803296A4 (fr) * 1995-10-03 1998-01-28 Taikisha Kk Etuve de sechage de peinture
US5868562A (en) * 1995-10-03 1999-02-09 Kaikisha Ltd. Paint drying furnace
EP0794012A1 (fr) * 1995-10-04 1997-09-10 Taikisha, Ltd. Etuve de sechage de peinture
EP0794012A4 (fr) * 1995-10-04 1999-02-03 Taikisha Kk Etuve de sechage de peinture
NL1034696C2 (nl) * 2007-11-14 2009-05-15 Allco Equipment Bvba Oven voor het poedercoaten van producten.
CN103673543A (zh) * 2013-11-29 2014-03-26 大连华根机械有限公司 带调风阀式烘干箱
KR102098165B1 (ko) * 2019-12-31 2020-04-07 문장묵 절연저항 측정이 가능한 스테이터 자동 건조시스템
WO2023227162A1 (fr) * 2022-05-24 2023-11-30 Dürr Systems Ag Installation de traitement et procédé de traitement de pièces

Also Published As

Publication number Publication date
SE7906694L (sv) 1981-02-10
SE417639B (sv) 1981-03-30
EP0033737A1 (fr) 1981-08-19

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