EP1222968B9 - Ventilation system for a paint spray booth - Google Patents

Ventilation system for a paint spray booth Download PDF

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Publication number
EP1222968B9
EP1222968B9 EP01100802A EP01100802A EP1222968B9 EP 1222968 B9 EP1222968 B9 EP 1222968B9 EP 01100802 A EP01100802 A EP 01100802A EP 01100802 A EP01100802 A EP 01100802A EP 1222968 B9 EP1222968 B9 EP 1222968B9
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EP
European Patent Office
Prior art keywords
spray booth
accordance
paint spray
ventilation
control device
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
EP01100802A
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German (de)
French (fr)
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EP1222968A1 (en
EP1222968B1 (en
Inventor
Frank Murlat
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Bolin Heatex Technology GmbH
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Bolin Heatex Technology GmbH
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Publication date
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Priority to DE50114835T priority Critical patent/DE50114835D1/en
Priority to AT01100802T priority patent/ATE428508T1/en
Priority to EP01100802A priority patent/EP1222968B9/en
Publication of EP1222968A1 publication Critical patent/EP1222968A1/en
Application granted granted Critical
Publication of EP1222968B1 publication Critical patent/EP1222968B1/en
Publication of EP1222968B9 publication Critical patent/EP1222968B9/en
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    • 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
    • F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B16/00—Spray booths
    • B05B16/60—Ventilation arrangements specially adapted therefor
    • 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
    • F26B21/10—Temperature; Pressure

Definitions

  • the invention relates to a ventilation device for a spray booth a Lackier religions, with a Zubuchventilator for acting on the spray booth with supply air, an exhaust fan for extracting the exhaust air from the spray booth, filter means by which the ingress of contaminants in the spray booth and the escape of paint particles the spray booth can be prevented, drive means by means of which the supply air and the exhaust fan can be driven, a heater by means of which the temperature in the spray booth is changeable, and a control device by means of which the drive means of Zuluft- and the exhaust fan can be controlled.
  • a component to be painted is introduced into the spray booth. Subsequently, this component is provided with at least one basecoat film.
  • the basecoat film initially used must first be pre-dried or cured in an intermediate drying process. This pre-drying or pre-hardening takes place in known spray booths at about that temperature, in which also the injection process, which serves to carry out this pre-hardening or -drying Intermediate drying process is interrupted takes place.
  • EP-A-0 584 638 discloses such a ventilation device for a spray booth of a painting operation.
  • the preamble of claim 1 is derived from this document.
  • the revelation EP-A-0 584 638 does not disclose an intermediate drying curtain.
  • the invention has the object of developing the above-described ventilation device for a spray booth a Lackier plantes such that the time and energy consumption for the painting process of a component can be further reduced.
  • the heating of the spray booth by means of the control device is controllable and that the control device is designed so that by means of her for the heater of the spray booth, a temperature level can be predetermined, which is to intermediate drying of a basecoat layer to be painted in the spray booth Component is adapted, and that by means of a control device, the supply air and the exhaust fan during an intermediate drying operation are automatically operated at a low speed.
  • a temperature level can be predetermined, which is to intermediate drying of a basecoat layer to be painted in the spray booth Component is adapted, and that by means of a control device, the supply air and the exhaust fan during an intermediate drying operation are automatically operated at a low speed.
  • this embodiment according to the invention results in addition to a reduction in the time consumption for the intermediate drying and a total of the painting a considerable energy savings.
  • the reduction of the time consumption and, correspondingly, the resulting energy saving is all the greater, the greater the number of basecoat films with which the component to be painted must be provided. Particularly advantageous effects arise in Wasserbas
  • a further reduction of the energy expenditure can be achieved if the control device is designed so that by means of her the Zu Kunststoff- and the exhaust fan during an intermediate drying operation are automatically operated at a lower speed, so that a higher temperature level is possible even at a given burner power. Furthermore, it is possible, the cost of the temperature change for the purpose of initiating the intermediate drying operation in that the control device is designed so that the supply air and the exhaust fan are operated during recirculation operation in an intermediate drying operation. Once heated by means of the heater air is then reintroduced into the spray booth due to the recirculation mode, which only needs to be further heated according to the temperature difference to the predetermined temperature for the intermediate drying operation. The dissipated heat loss to the environment is considerably reduced in this approach.
  • control device is designed so that a speed change of both the Zu Kunststoff- and the exhaust fan is performed by means of a speed jump-free, continuous speed change phase.
  • control device has a switching element by means of which an adjustable desired value for the temperature level adapted to the intermediate drying can be predetermined on the control device.
  • This setpoint can be different depending on the requirement profile for the intermediate drying process or for the quality of the basecoat film.
  • the ventilation device has a temperature sensor which is arranged in the supply air duct of the spray booth and connected to the control device.
  • the temperature level in the supply air flow can be suitably used as a basic variable for controlling or regulating the temperature within the spray booth.
  • control device be designed so that by means of it for the heating of the spray booth, a second temperature level can be predetermined, which is adapted to a taking place in the spray booth injection process.
  • control device be designed so that by means of it for the heating of the spray booth, a third temperature level can be predetermined, which is adapted to a performed for an outer or clear coat layer burning process.
  • the temperature level provided for the intermediate drying process is usually between the temperature level adapted to the spraying process and the firing process.
  • the supply-side and the exhaust-side filter means are exchanged at regular intervals to ensure that tolerable operating conditions prevail within the spray booth, and that the environment of the spray booth is not inadmissible with paint particles or the like. is contaminated.
  • the course of the period of use increasingly occurs a burden of the two filter devices with impurities or paint particles and thus decreases the permeability of the mutual filter devices with increasing useful life.
  • the drive device of the exhaust fan adjustable according to the pollution of the exhaust air side filter device. This is given the possibility with little effort, the exhaust fan depending on the degree of contamination of the exhaust-side filter device set differently, so that without any flap adjustment or the like. an adaptation of the exhaust air side filter device by flowing air quantity is possible. It is thus avoided that the drive device of the exhaust fan operates virtually during the entire useful life of the replaceable exhaust-side filter device with that power output, which is actually only required in the event that the exhaust-side filter device at the end of their period of use more or less strongly with paint particles or the like , is acted upon, which affect the permeability of the exhaust air side filter device.
  • a further energy saving can be achieved if a drive device of the supply air fan is adjustable according to the contamination of the supply-side filter device. As a result, a corresponding energy saving in the operation of the drive device of the supply air fan is achieved analogously to the manner described above for the exhaust fan.
  • the ventilation device is in the control device as an input variable for polluting the exhaust-side filter device proportional parameters and possibly a for polluting the supply-side filter device proportional parameters entered.
  • the control device is the drive means of the discharge fan and possibly the supply air fan according to the pollution of the exhaust-side or supply-side filter device adjustable.
  • the ventilation device according to the invention can be realized with a comparatively small technical and design effort, if in the spray booth a pressure gauge is arranged, by means of pressure in the spray booth as to pollute the exhaust air side or supply-side filter device proportional parameters can be entered into the control device. According to the course of the pressure in the spray booth, the drive device of the exhaust fan or that of the supply air generator is then tracked in such a way that the amount of air flowing through the two filter devices is constant.
  • the two drive means are formed as usual as electric motors, their power output can be controlled in an appropriate manner by means of a respective arranged between the drive means and the control means frequency converter.
  • the frequency converter which act practically as an automatic transmission, the electric motors can be controlled exactly as needed according to the given by the degree of contamination of the filter devices power requirements. Furthermore, when using frequency converters for controlling the electric motors, the load peaks caused by the startup of such electric motors are avoided.
  • control device is associated with a tap changer, by means of which different power output ranges can be specified for each drive device, within which each drive device can be adjusted or regulated according to the contamination of the exhaust air and possibly supply air side filter device.
  • the tap changer can advantageously be configured as a three-stage switch, with its first stage corresponding to a standby mode, its second stage to a partial load stage and its third stage to a full load mode of the spray booth.
  • Standby mode can always be used when there are work interruptions.
  • the frequency converter is set to 40% of the maximum power of the supply air fan or extractor fan.
  • partial load operation which can occur with short paint finishes and with full paint jobs depending on the spray mist accumulation, it is possible to set the power of the supply air fan and exhaust fan to approx. 60% of the maximum power.
  • full-load operation the maximum power of the supply and extract air fans is then set on the three-step switch.
  • the supply air and the exhaust air flow can be reduced during the intermediate drying process.
  • the temperature of the supply air flow can be measured and advantageously used as a basis for regulating the temperature in the spray booth.
  • the exhaust air flow is kept constant or changed independently of the pollution exhaust air side filter means.
  • a spray booth not shown in the figure has on its supply air side a supply air fan 1, by means of the ambient air into the spray booth can be inserted.
  • the supply air fan 1 is assigned an inlet-side filter device 2, to which an exchangeable filter cover, mat or the like expediently. belongs.
  • a pressure gauge 3 which may be designed as a membrane pressure switch. By means of the pressure gauge 3, the pressure in the spray booth is measured.
  • the supply air fan 1 is driven by means of a first electric motor 4, which may be e.g. can act around a three-phase motor.
  • the power output of the first electric motor 4 and thus the speed and flow rate of the supply air fan 1 is controlled by a control device 5 and a frequency converter 6, wherein the control device 5 pre-processed by the pressure gauge 3 in it, the pressure curve in the spray booth corresponding pressure measurement signal and to the first Frequency converter 6 passes, so that the power output of the first frequency converter 6 associated first electric motor 4 is controlled according to the pressure profile in the spray booth and thus according to the degree of contamination of the supply-side filter device 2.
  • the exhaust fan 7 is associated with an exhaust-side filter device 8.
  • the exhaust-air-side filter device 8 also has filter covers, mats or the like to be exchanged in specific periodic periods.
  • the Druckmeßsignal entered by the pressure gauge 3 is preprocessed by the control device 5 and forwarded to a second frequency converter 9, which in turn controls a the exhaust fan 7 driving second electric motor 10.
  • the regulation of the second electric motor 10 also takes place as a function of the pressure variation in the spray booth and thus depending on the degree of contamination of the exhaust-air-side filter device 8.
  • the two electric motors 4, 10 are adapted in terms of their energy consumption to the degree of contamination of the two filter devices 2, 8, so that it is no longer - as in the prior art - required to operate each with the required at the highest degree of contamination of the filter devices energy.
  • the control device 5 is assigned a three-step switch 11, by means of which for each electric motor 4, 10 different power output ranges can be predetermined; Within these predetermined power output ranges, the two electric motors 4, 10 are regulated as a function of the degree of soiling of the supply-side and exhaust-air-side filter devices 8. In this case, it is possible for the predefinable power output ranges to overlap or overlap at their edges.
  • the predeterminable power output ranges may correspond, for example, to a standby, a part load and a full load operation of the spray booth.
  • a heating device 12 e.g. preferably in the form of a burner.
  • the temperature can be varied within the spray booth.
  • the heating device 12 is connected to the control device 5.
  • a temperature sensor 13 is arranged in the supply air duct of the spray booth, not shown in the single figure, by means of which the temperature of the inlet air entering the spray booth can be detected. This temperature serves as an output variable for the control of the heating device 12 in order to achieve the respectively required or desired temperature level within the spray booth as quickly as possible.
  • each basecoat film In the spray booth to be painted components are provided with at least one basecoat film, wherein after application of each basecoat film initially an intermediate drying process carried out in which no further paint is sprayed onto the component.
  • the temperature level within the spray booth can be set or increased at the beginning of such an intermediate drying process so that the optimal temperature for the intermediate drying process is created as quickly as possible.
  • each optimal temperature level is controlled within the spray booth, so that overall results in a shortening of the painting process with a concomitant reduced technical and economic effort.
  • control device 5 is designed so that both the supply air fan 1 and the exhaust fan 7 are automatically operated at the initiation of an intermediate drying operation at a lower speed. The energy required for the operation of the two fans 1, 7 is thereby significantly reduced.
  • control device 5 is designed so that by means of a speed change of the supply air fan 1 or the exhaust fan 7 is performed in a gradual transition, so that speed jumps are avoided in any case.
  • the control device 5 is associated with a switching element 15, by means of which on the control device 5 a variable according to the respective requirement profile variable setpoint is adjustable.
  • This setpoint corresponds to the adapted to the intermediate drying process temperature level, which is to be maintained within the injection chamber.

Abstract

The device has an input air fan for subjecting the spray cabin to input air, an output air fan for sucking the used air from the cabin, filters for preventing impurities from entering the cabin and paint particles from leaving the cabin, fan drives, a heater and a controller. The controller specifies a temperature level for the cabin adapted to intermediate drying of a base paint layer on the component in the cabin. Independent claims are also included for the following: a ventilation method for a spray cabin of a painting system.

Description

Die Erfindung bezieht sich auf eine Belüftungsvorrichtung für eine Spritzkabine eines Lackierbetriebs, mit einem Zuluftventilator zur Beaufschlagung der Spritzkabine mit Zuluft, einem Abluftventilator zur Absaugung der Abluft aus der Spritzkabine, Filtereinrichtungen, mittels denen das Eintreten von Verunreinigungen in die Spritzkabine und das Austreten von Lackpartikeln aus der Spritzkabine verhinderbar ist, Antriebseinrichtungen, mittels denen der Zuluft-und der Abluftventilator antreibbar sind, einer Heizeinrichtung, mittels der die Temperatur in der Spritzkabine veränderbar ist, und einer Steuervorrichtung, mittels der die Antriebseinrichtungen des Zuluft- und des Abluftventilators steuerbar sind.The invention relates to a ventilation device for a spray booth a Lackierbetriebs, with a Zuluftventilator for acting on the spray booth with supply air, an exhaust fan for extracting the exhaust air from the spray booth, filter means by which the ingress of contaminants in the spray booth and the escape of paint particles the spray booth can be prevented, drive means by means of which the supply air and the exhaust fan can be driven, a heater by means of which the temperature in the spray booth is changeable, and a control device by means of which the drive means of Zuluft- and the exhaust fan can be controlled.

Bei dem Betrieb der vorstehend erwähnten Spritzkabinen wird ein zu lackierendes Bauteil in die Spritzkabine eingebracht. Daraufhin wird dieses Bauteil mit zumindest einer Basislackschicht versehen. Vor der Beaufschlagung des Bauteils mit einer weiteren Basislackschicht bzw. mit einer Außen- bzw. Klarlackschicht muß zunächst in einem Zwischentrocknungsvorgang die zunächst aufgebrauchte Basislackschicht vorgetrocknet bzw. -gehärtet werden. Diese Vortrocknung bzw. Vorhärtung findet bei bekannten Spritzkabinen bei etwa derjenigen Temperatur statt, bei der auch der Spritzvorgang, welcher zur Durchführung dieses der Vorhärtung bzw. -trocknung dienenden Zwischentrocknungsvorgangs unterbrochen wird, stattfindet.In the operation of the spray booths mentioned above, a component to be painted is introduced into the spray booth. Subsequently, this component is provided with at least one basecoat film. Before applying the component with a further basecoat film or with an outer or clearcoat film, the basecoat film initially used must first be pre-dried or cured in an intermediate drying process. This pre-drying or pre-hardening takes place in known spray booths at about that temperature, in which also the injection process, which serves to carry out this pre-hardening or -drying Intermediate drying process is interrupted takes place.

EP-A-0 584 638 offenbart eine solche Belüftungseinrichtung für eine Spritzkabine eines Lackierbetriebs. Der Oberbegriff des Anspruchs 1 ist aus diesem Dokument abgeleitet. Die Offenbarung EP-A-0 584 638 offenbart keinen Zwischentrocknungsvorhang. EP-A-0 584 638 discloses such a ventilation device for a spray booth of a painting operation. The preamble of claim 1 is derived from this document. The revelation EP-A-0 584 638 does not disclose an intermediate drying curtain.

Der Erfindung liegt die Aufgabe zugrunde, die eingangs geschilderte Belüftungsvorrichtung für eine Spritzkabine eines Lackierbetriebs derart weiterzubilden, daß der Zeit- und der Energieaufwand für den Lackiervorgang eines Bauteils weiter reduziert werden kann.The invention has the object of developing the above-described ventilation device for a spray booth a Lackierbetriebs such that the time and energy consumption for the painting process of a component can be further reduced.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Heizeinrichtung der Spritzkabine mittels der Steuervorrichtung steuerbar ist und daß die Steuervorrichtung so ausgebildet ist, daß mittels ihr für die Heizeinrichtung der Spritzkabine ein Temperaturniveau vorgebbar ist, das an eine Zwischentrocknung einer Basislackschicht eines in der Spritzkabine zu lackierenden Bauteils angepaßt ist, und daß mittels einer Steuervorrichtung der Zuluft- und der Abluftventilator während eines Zwischentrocknungsvorgangs automatisch mit einer niedrigen Drehzahl betreibbar sind. Bei dieser erfindungsgemäßen Ausgestaltung ergibt sich neben einer Reduzierung des Zeitverbrauchs für die Zwischentrocknung auch insgesamt für den Lackiervorgang eine erhebliche Energieeinsparung. Die Reduktion des Zeitverbrauchs und entsprechend auch die sich ergebende Energieeinsparung ist umso größer, je größer die Anzahl der Basislackschichten ist, mit denen das zu lackierende Bauteil versehen werden muß. Besonders vorteilhafte Wirkungen ergeben sich bei Wasserbasislakken.This object is achieved in that the heating of the spray booth by means of the control device is controllable and that the control device is designed so that by means of her for the heater of the spray booth, a temperature level can be predetermined, which is to intermediate drying of a basecoat layer to be painted in the spray booth Component is adapted, and that by means of a control device, the supply air and the exhaust fan during an intermediate drying operation are automatically operated at a low speed. In this embodiment according to the invention results in addition to a reduction in the time consumption for the intermediate drying and a total of the painting a considerable energy savings. The reduction of the time consumption and, correspondingly, the resulting energy saving is all the greater, the greater the number of basecoat films with which the component to be painted must be provided. Particularly advantageous effects arise in Wasserbasislakken.

Eine weitere Reduktion des Energieaufwands läßt sich erreichen, wenn die Steuervorrichtung so ausgebildet ist, daß mittels ihr der Zuluft- und der Abluftventilator während eines Zwischentrocknungsvorgangs automatisch mit einer niedrigeren Drehzahl betrieben werden, so daß ein höheres Temperaturniveau auch bei gegebener Brennerleistung möglich ist. Des weiteren ist es möglich, den Aufwand für die Temperaturveränderung zwecks Einleitung des Zwischentrocknungsvorgangs dadurch zu reduzieren, daß die Steuervorrichtung so ausgebildet ist, daß der Zuluft- und der Abluftventilator während eines Zwischentrocknungsvorgangs im Umluftbetrieb betrieben werden. Einmal mittels der Heizeinrichtung aufgeheizte Luft wird dann aufgrund des Umluftbetriebs erneut in die Spritzkabine eingeführt, wobei diese nur noch entsprechend der Temperaturdifferenz zur für den Zwischentrocknungsvorgang vorgegebenen Solltemperatur weiter erhitzt werden muß. Die an die Umgebung abgegebene Verlustwärme wird bei dieser Vorgehensweise erheblich reduziert.A further reduction of the energy expenditure can be achieved if the control device is designed so that by means of her the Zuluft- and the exhaust fan during an intermediate drying operation are automatically operated at a lower speed, so that a higher temperature level is possible even at a given burner power. Furthermore, it is possible, the cost of the temperature change for the purpose of initiating the intermediate drying operation in that the control device is designed so that the supply air and the exhaust fan are operated during recirculation operation in an intermediate drying operation. Once heated by means of the heater air is then reintroduced into the spray booth due to the recirculation mode, which only needs to be further heated according to the temperature difference to the predetermined temperature for the intermediate drying operation. The dissipated heat loss to the environment is considerably reduced in this approach.

Um zu verhindern, daß Staubaufwirbelungen auftreten, ist es vorteilhaft, wenn die Steuervorrichtung so ausgebildet ist, daß eine Drehzahländerung sowohl des Zuluft- als auch des Abluftventilators mittels einer drehzahlsprungfreien, stetigen Drehzahländerungsphase durchgeführt wird.In order to prevent Staubaufwirbelungen occur, it is advantageous if the control device is designed so that a speed change of both the Zuluft- and the exhaust fan is performed by means of a speed jump-free, continuous speed change phase.

Vorteilhaft weist die Steuervorrichtung ein Schaltelement auf, mittels dem an der Steuervorrichtung ein einstellbarer Sollwert für das an die Zwischentrocknung angepaßte Temperaturniveau vorgebbar ist. Dieser Sollwert kann je nach Anforderungsprofil für den Zwischentrocknungsvorgang bzw. für die Qualität der Basislackschicht unterschiedlich sein.Advantageously, the control device has a switching element by means of which an adjustable desired value for the temperature level adapted to the intermediate drying can be predetermined on the control device. This setpoint can be different depending on the requirement profile for the intermediate drying process or for the quality of the basecoat film.

Zweckmäßigerweise weist die erfindungsgemäße Belüftungsvorrichtung einen Temperaturfühler auf, der im Zuluftkanal der Spritzkabine angeordnet und an die Steuervorrichtung angeschlossen ist. Hierdurch kann in geeigneter Weise das Temperaturniveau im Zuluftstrom als Basisgröße für die Steuerung bzw. Regelung der Temperatur innerhalb der Spritzkabine eingesetzt werden.Appropriately, the ventilation device according to the invention has a temperature sensor which is arranged in the supply air duct of the spray booth and connected to the control device. As a result, the temperature level in the supply air flow can be suitably used as a basic variable for controlling or regulating the temperature within the spray booth.

Selbstverständlich kann gemäß einer weiteren Ausführungsform der erfindungsgemäßen Belüftungsvorrichtung die Steuervorrichtung so ausgebildet sein, daß mittels ihr für die Heizeinrichtung der Spritzkabine ein zweites Temperaturniveau vorgebbar ist, das an einen in der Spritzkabine stattfindenden Spritzvorgang angepaßt ist.Of course, according to a further embodiment of the ventilation device according to the invention, the control device be designed so that by means of it for the heating of the spray booth, a second temperature level can be predetermined, which is adapted to a taking place in the spray booth injection process.

Darüber hinaus kann gemäß einer weiteren Ausführungsform der Erfindung die Steuervorrichtung so ausgebildet sein, daß mittels ihr für die Heizeinrichtung der Spritzkabine ein drittes Temperaturniveau vorgebbar ist, das an einen für eine Außen- bzw. Klarlackschicht durchgeführten Brennvorgang angepaßt ist.In addition, according to a further embodiment of the invention, the control device be designed so that by means of it for the heating of the spray booth, a third temperature level can be predetermined, which is adapted to a performed for an outer or clear coat layer burning process.

Das für den Zwischentrocknungsvorgang vorgesehene Temperaturniveau liegt üblicherweise zwischen dem an den Spritzvorgang und dem an den Brennvorgang angepaßten Temperaturniveau.The temperature level provided for the intermediate drying process is usually between the temperature level adapted to the spraying process and the firing process.

Bei derartigen Belüftungsvorrichtungen werden die zuluftseitige und die abluftseitige Filtereinrichtung in regelmäßigen Zeitabständen ausgetauscht, um sicherzustellen, daß innerhalb der Spritzkabine erträgliche Arbeitsbedingungen vorherrschen, und daß die Umgebung der Spritzkabine nicht in unzulässiger Weise mit Lackpartikeln od.dgl. verunreinigt wird. Im Zuge des Nutzungszeitraums tritt zunehmend eine Belastung der beiden Filtereinrichtungen mit Verunreinigungen bzw. Lackpartikeln auf und somit nimmt die Durchlässigkeit der beiderseitigen Filtereinrichtungen mit zunehmender Nutzungsdauer ab.In such ventilation devices, the supply-side and the exhaust-side filter means are exchanged at regular intervals to ensure that tolerable operating conditions prevail within the spray booth, and that the environment of the spray booth is not inadmissible with paint particles or the like. is contaminated. In the course of the period of use increasingly occurs a burden of the two filter devices with impurities or paint particles and thus decreases the permeability of the mutual filter devices with increasing useful life.

Um den Energieverbrauch der Belüftungsvorrichtung weiter zu verringern, ist die Antriebseinrichtung des Abluftventilators entsprechend der Verschmutzung der abluftseitigen Filtereinrichtung einstellbar. Hierbei ist mit einem geringen Aufwand die Möglichkeit gegeben, den Abluftventilator in Abhängigkeit vom Verschmutzungsgrad der abluftseitigen Filtereinrichtung unterschiedlich einzustellen, so daß ohne jedwede Klappenverstellung od.dgl. eine Anpassung der die abluftseitige Filtereinrichtung durchströmenden Luftmenge möglich ist. Es wird somit vermieden, daß die Antriebseinrichtung des Abluftventilators quasi während der gesamten Nutzungsdauer der austauschbaren abluftseitigen Filtereinrichtung mit derjenigen Leistungsabgabe arbeitet, die eigentlich nur für den Fall erforderlich ist, daß die abluftseitige Filtereinrichtung zu Ende ihres Nutzungszeitraums mehr oder weniger stark mit Lackpartikeln od.dgl. beaufschlagt ist, welche die Durchlässigkeit der abluftseitigen Filtereinrichtung beeinträchtigen.In order to further reduce the energy consumption of the ventilation device, the drive device of the exhaust fan adjustable according to the pollution of the exhaust air side filter device. This is given the possibility with little effort, the exhaust fan depending on the degree of contamination of the exhaust-side filter device set differently, so that without any flap adjustment or the like. an adaptation of the exhaust air side filter device by flowing air quantity is possible. It is thus avoided that the drive device of the exhaust fan operates virtually during the entire useful life of the replaceable exhaust-side filter device with that power output, which is actually only required in the event that the exhaust-side filter device at the end of their period of use more or less strongly with paint particles or the like , is acted upon, which affect the permeability of the exhaust air side filter device.

Eine weitere Energieeinsparung ist erreichbar, wenn eine Antriebseinrichtung des Zuluftventilators entsprechend der Verschmutzung der zuluftseitigen Filtereinrichtung einstellbar ist. Hierdurch wird analog zu der vorstehend für den Abluftventilator beschriebenen Art und Weise eine entsprechende Energieeinsparung bei dem Betrieb der Antriebseinrichtung des Zuluftventilators erreicht.A further energy saving can be achieved if a drive device of the supply air fan is adjustable according to the contamination of the supply-side filter device. As a result, a corresponding energy saving in the operation of the drive device of the supply air fan is achieved analogously to the manner described above for the exhaust fan.

Gemäß einer vorteilhaften Ausführungsform der erfindungsgemäßen Belüftungsvorrichtung ist in deren Steuervorrichtung als Eingangsgröße ein zur Verschmutzung der abluftseitigen Filtereinrichtung proportionaler Parameter und ggf. ein zur Verschmutzung der zuluftseitigen Filtereinrichtung proportionaler Parameter eingebbar. Mittels der Steuervorrichtung ist die Antriebseinrichtung des Ablauftventilators und ggf. die des Zuluftventilators entsprechend der Verschmutzung der abluftseitigen bzw. zuluftseitigen Filtereinrichtung regelbar. Hierdurch ist eine quasi kontinuierliche Nachstellung der beiden Antriebseinrichtungen für den Abluft- sowie den Zuluftventilator möglich, so daß jeweils seitens der beiden Antriebseinrichtungen die optimale Abgabeleistung zur Verfügung gestellt wird. Eine manuelle Einstellung der Antriebseinrichtungen und die damit einhergehenden Fehlerquellen werden hierdurch vollständig vermieden.According to an advantageous embodiment of the ventilation device according to the invention is in the control device as an input variable for polluting the exhaust-side filter device proportional parameters and possibly a for polluting the supply-side filter device proportional parameters entered. By means of the control device is the drive means of the discharge fan and possibly the supply air fan according to the pollution of the exhaust-side or supply-side filter device adjustable. As a result, a quasi-continuous adjustment of the two drive means for the exhaust and the supply air fan is possible, so that in each case the part of the two drive means, the optimal output power is provided. A manual adjustment of the drive means and the associated error sources are thereby completely avoided.

Die erfindungsgemäße Belüftungsvorrichtung kann mit einem vergleichsweise geringen technisch-konstruktiven Aufwand verwirklicht werden, wenn in der Spritzkabine ein Druckmesser angeordnet ist, mittels Druck in der Spritzkabine als zur Verschmutzung der abluftseitigen bzw. zuluftseitigen Filtereinrichtung proportionaler Parameter in die Steuereinrichtung eingebbar ist. Entsprechend dem Verlauf des Drucks in der Spritzkabine wird dann die Antriebseinrichtung des Abluftventilators bzw. die des Zuluftgenerators in einer Weise nachgeführt, daß die die beiden Filtereinrichtungen durchströmende Luftmenge konstant ist.The ventilation device according to the invention can be realized with a comparatively small technical and design effort, if in the spray booth a pressure gauge is arranged, by means of pressure in the spray booth as to pollute the exhaust air side or supply-side filter device proportional parameters can be entered into the control device. According to the course of the pressure in the spray booth, the drive device of the exhaust fan or that of the supply air generator is then tracked in such a way that the amount of air flowing through the two filter devices is constant.

Als Druckmesser haben sich Membran-Druckwächter als besonders vorteilhaft erwiesen.As a pressure gauge diaphragm pressure switch have proven to be particularly advantageous.

Wenn die beiden Antriebseinrichtungen wie üblich als Elektromotoren ausgebildet sind, kann deren Abgabeleistung in zweckmäßiger Weise mittels jeweils eines zwischen der Antriebseinrichtung und der Steuereinrichtung angeordneten Frequenzumformers geregelt werden. Mittels der Frequenzumformer, die praktisch als Automatikgetriebe fungieren, können die Elektromotoren exakt bedarfsgerecht entsprechend der durch den Verschmutzungsgrad der Filtereinrichtungen vorgegebenen Leistungsanforderungen geregelt werden. Darüber hinaus werden bei Einsatz von Frequenzumformern zur Regelung der Elektromotoren die durch den Anlauf derartiger Elektromotoren verursachten Lastspitzen vermieden.If the two drive means are formed as usual as electric motors, their power output can be controlled in an appropriate manner by means of a respective arranged between the drive means and the control means frequency converter. By means of the frequency converter, which act practically as an automatic transmission, the electric motors can be controlled exactly as needed according to the given by the degree of contamination of the filter devices power requirements. Furthermore When using frequency converters for controlling the electric motors, the load peaks caused by the startup of such electric motors are avoided.

Bei einer vorteilhaften Ausführungsform der erfindungsgemäßen Belüftungsvorrichtung ist der Steuereinrichtung ein Stufenschalter zugeordnet, mittels dem für jede Antriebseinrichtung unterschiedliche Leistungsabgabebereiche vorgebbar sind, innerhalb denen jede Antriebseinrichtung entsprechend der Verschmutzung der abluft- und ggf. zuluftseitigen Filtereinrichtung einstell- bzw. regelbar ist.In an advantageous embodiment of the ventilation device according to the invention, the control device is associated with a tap changer, by means of which different power output ranges can be specified for each drive device, within which each drive device can be adjusted or regulated according to the contamination of the exhaust air and possibly supply air side filter device.

Der Stufenschalter kann vorteilhaft als Dreistufenschalter ausgebildet sein, wobei seine erste Stufe einem Standby-, seine zweite Stufe einem Teillast- und seine dritte Stufe einem Vollastbetrieb der Spritzkabine entspricht. Auf den Standby-Betrieb kann immer dann übergegangen werden, wenn Arbeitsunterbrechungen vorliegen. Beispielsweise ist im Standby-Betrieb der Frequenzumformer auf 40 % der maximalen Leistung des Zuluft- bzw. des Abluftventilators eingestellt. Im Teillastbetrieb, der bei kurzen Lackierungen und bei Vollackierungen je nach Spritznebelanfall vorliegen kann, ist es möglich, die Leistung des Zuluft- und des Abluftventilators auf ca. 60 % der maximalen Leistung einzustellen. Im Vollastbetrieb wird am Dreistufenschalter dann die maximale Leistung des Zuluft- und des Abluftventilators eingestellt.The tap changer can advantageously be configured as a three-stage switch, with its first stage corresponding to a standby mode, its second stage to a partial load stage and its third stage to a full load mode of the spray booth. Standby mode can always be used when there are work interruptions. For example, in standby mode, the frequency converter is set to 40% of the maximum power of the supply air fan or extractor fan. In partial load operation, which can occur with short paint finishes and with full paint jobs depending on the spray mist accumulation, it is possible to set the power of the supply air fan and exhaust fan to approx. 60% of the maximum power. In full-load operation, the maximum power of the supply and extract air fans is then set on the three-step switch.

Die mit der eingangs geschilderten erfindungsgemäßen Belüftungsvorrichtung erreichbaren Vorteile ergeben sich auch bei einem Belüftungsverfahren für eine Spritzkabine eines Lakkierbetriebs, bei dem die Spritzkabine mit Zuluft beaufschlagt und Abluft aus der Spritzkabine abgesaugt wird, die in die Spritzkabine eintretende Zuluft und die aus der Spritzkabine abgesaugte Abluft gefiltert werden, die Zuluft-und die Abluftströmung separat gesteuert werden, und die Temperatur in der Spritzkabine variiert wird, wenn bei einer Zwischentrocknung einer Basislackschicht eines in der Spritzkabine zu lackierenden Bauteils ein an die Zwischentrocknung angepaßtes Temperaturniveau eingestellt wird.The achievable with the above-described ventilation device according to the invention advantages also result in a ventilation method for a spray booth Lakkierbetriebs in which the spray booth charged with supply air and exhaust air is sucked out of the spray booth, entering the spray booth incoming air and from the Spray booth exhausted exhaust air are filtered, the supply air and the exhaust air flow are controlled separately, and the temperature in the spray booth is varied when an intermediate drying of a base coat layer to be painted in the spray booth component is adjusted to the intermediate drying temperature level.

Hierbei können die Zuluft- und die Abluftströmung während des Zwischentrocknungsvorgangs reduziert werden.In this case, the supply air and the exhaust air flow can be reduced during the intermediate drying process.

Des weiteren ist es möglich, die Zuluft- und die Abluftströmung während des Zwischentrocknungsvorgangs zu einer Umluftströmung zusammenzuschalten.Furthermore, it is possible to interconnect the supply air and the exhaust air flow during the intermediate drying process to a circulating air flow.

Zur Vermeidung von Staubaufwirbelungen ist es zweckmäßig, Änderungen der Zu- und der Abluftströmung stetig und stoßfrei durchzuführen.To avoid Staubaufwirbelungen it is expedient to perform changes in the supply and exhaust air flow steadily and smoothly.

Die Temperatur der Zuluftströmung kann gemessen und vorteilhaft als Grundlage zur Regelung der Temperatur in der Spritzkabine eingesetzt werden.The temperature of the supply air flow can be measured and advantageously used as a basis for regulating the temperature in the spray booth.

Des weiteren ist es möglich, bei einem in der Spritzkabine stattfindenden Spritzvorgang ein an diesen Spritzvorgang angepaßtes Temperaturniveau einzustellen.Furthermore, it is possible to set a temperature level adapted to this injection process in the case of an injection process taking place in the spray booth.

Dasselbe gilt selbstverständlich auch für einen in der Spritzkabine stattfindenden Brennvorgang.The same naturally also applies to a firing process taking place in the spray booth.

Zweckmäßigerweise wird die Abluftströmung unabhängig von der Verschmutzung abluftseitiger Filtereinrichtungen konstant gehalten bzw. verändert.Advantageously, the exhaust air flow is kept constant or changed independently of the pollution exhaust air side filter means.

Dasselbe gilt selbstverständlich auch für die Zuluftströmung gemäß einer weiteren vorteilhaften Ausführungsform des erfindungsgemäßen Verfahrens.The same naturally also applies to the supply air flow according to a further advantageous embodiment of the method according to the invention.

Im folgenden wird die Erfindung an Hand einer Ausführungsform unter Bezugnahme auf die Zeichnung näher beschrieben, in der für die vorliegende Erfindung wesentliche Bestandteile der erfindungsgemäßen Belüftungsvorrichtung gezeigt sind.In the following the invention with reference to an embodiment will be described in more detail with reference to the drawing, in which essential components of the ventilation device according to the invention are shown for the present invention.

Eine in der Figur nicht dargestellte Spritzkabine hat auf ihrer Zuluftseite einen Zuluftventilator 1, mittels dem Umgebungsluft in die Spritzkabine einführbar ist. Um zu vermeiden, daß mit der Umgebungsluft Verunreinigungen in die Spritzkabine geraten, ist dem Zuluftventilator 1 eine zuluftseitige Filtereinrichtung 2 zugeordnet, zu der zweckmäßigerweise eine austauschbare Filterdecke, -matte od.dgl. gehört.A spray booth, not shown in the figure has on its supply air side a supply air fan 1, by means of the ambient air into the spray booth can be inserted. In order to avoid contaminants from getting into the spray booth with the ambient air, the supply air fan 1 is assigned an inlet-side filter device 2, to which an exchangeable filter cover, mat or the like expediently. belongs.

In der Spritzkabine sitzt ein Druckmesser 3, der als Membran-Druckwächter ausgebildet sein kann. Mittels des Druckmessers 3 wird der Druck in der Spritzkabine gemessen.In the spray booth sits a pressure gauge 3, which may be designed as a membrane pressure switch. By means of the pressure gauge 3, the pressure in the spray booth is measured.

Der Zuluftventilator 1 wird mittels eines ersten Elektromotors 4 angetrieben, bei dem es sich z.B. um einen Drehstrommotor handeln kann.The supply air fan 1 is driven by means of a first electric motor 4, which may be e.g. can act around a three-phase motor.

Die Leistungsabgabe des ersten Elektromotors 4 und damit die Drehzahl und Förderleistung des Zuluftventilators 1 wird mittels einer Steuervorrichtung 5 und eines Frequenzumformers 6 geregelt, wobei die Steuervorrichtung 5 ein vom Druckmesser 3 in sie eingegebenes, dem Druckverlauf in der Spritzkabine entsprechendes Druckmeßsignal vorverarbeitet und an den ersten Frequenzumformer 6 weiterleitet, so daß die Leistungsabgabe des dem ersten Frequenzumformer 6 zugeordneten ersten Elektromotors 4 entsprechend dem Druckverlauf in der Spritzkabine und damit entsprechend dem Verschmutzungsgrad der zuluftseitigen Filtereinrichtung 2 geregelt wird.The power output of the first electric motor 4 and thus the speed and flow rate of the supply air fan 1 is controlled by a control device 5 and a frequency converter 6, wherein the control device 5 pre-processed by the pressure gauge 3 in it, the pressure curve in the spray booth corresponding pressure measurement signal and to the first Frequency converter 6 passes, so that the power output of the first frequency converter 6 associated first electric motor 4 is controlled according to the pressure profile in the spray booth and thus according to the degree of contamination of the supply-side filter device 2.

Ein Abluftventilator 7, der auf der Abluftseite der in der Figur nicht dargestellten Spritzkabine angeordnet ist, dient dazu, Luft aus der Spritzkabine in die Umgebung auszuführen. Um zu vermeiden, daß Lackpartikel und ähnliche Verunreinigungen aus der Spritzkabine in deren Umgebung gelangen, ist dem Abluftventilator 7 eine abluftseitige Filtereinrichtung 8 zugeordnet. Wie die zuluftseitige Filtereinrichtung 2 hat auch die abluftseitige Filtereinrichtung 8 in bestimmten regelmäßigen Zeiträumen auszutauschende Filterdecken, -matten od.dgl.An exhaust fan 7, which is arranged on the exhaust side of the spray booth, not shown in the figure, serves to carry air from the spray booth into the environment. In order to avoid that paint particles and similar impurities from the spray booth reach their environment, the exhaust fan 7 is associated with an exhaust-side filter device 8. Like the supply-side filter device 2, the exhaust-air-side filter device 8 also has filter covers, mats or the like to be exchanged in specific periodic periods.

Das vom Druckmesser 3 in sie eingegebene Druckmeßsignal wird von der Steuereinrichtung 5 vorverarbeitet und an einen zweiten Frequenzumformer 9 weitergeleitet, der seinerseits einen den Abluftventilator 7 antreibenden zweiten Elektromotor 10 regelt. Die Regelung auch des zweiten Elektromotors 10 erfolgt in Abhängigkeit vom Druckverlauf in der Spritzkabine und damit in Abhängigkeit vom Verschmutzungsgrad der abluftseitigen Filtereinrichtung 8.The Druckmeßsignal entered by the pressure gauge 3 is preprocessed by the control device 5 and forwarded to a second frequency converter 9, which in turn controls a the exhaust fan 7 driving second electric motor 10. The regulation of the second electric motor 10 also takes place as a function of the pressure variation in the spray booth and thus depending on the degree of contamination of the exhaust-air-side filter device 8.

Die beiden Elektromotoren 4, 10 sind hinsichtlich ihres Energieverbrauchs an den Verschmutzungsgrad der beiden Filtereinrichtungen 2, 8 angepaßt, so daß es nicht mehr - wie beim Stand der Technik - erforderlich ist, sie jeweils mit der bei höchstem Verschmutzungsgrad der Filtereinrichtungen erforderlichen Energieaufwand zu betreiben.The two electric motors 4, 10 are adapted in terms of their energy consumption to the degree of contamination of the two filter devices 2, 8, so that it is no longer - as in the prior art - required to operate each with the required at the highest degree of contamination of the filter devices energy.

Bei dem dargestellten Ausführungsbeispiel ist der Steuereinrichtung 5 ein Dreistufenschalter 11 zugeordnet, mittels dem für jeden Elektromotor 4, 10 unterschiedliche Leistungsabgabebereiche vorgegebbar sind; innerhalb dieser vorgegebenen Leistungsabgabebereiche werden die beiden Elektromotoren 4, 10 in Abhängigkeit vom Verschmutzungsgrad der zuluftseitigen und der abluftseitigen Filtereinrichtungen 8 geregelt. Hierbei ist es möglich, daß sich die vorgebbaren Leistungsabgabebereiche an ihren Rändern überlappen bzw. überlagern. Die vorgebbaren Leistungsabgabebereiche können beispielsweise einem Standby-, einem Teillast- und einem Vollastbetrieb der Spritzkabine entsprechen.In the illustrated embodiment, the control device 5 is assigned a three-step switch 11, by means of which for each electric motor 4, 10 different power output ranges can be predetermined; Within these predetermined power output ranges, the two electric motors 4, 10 are regulated as a function of the degree of soiling of the supply-side and exhaust-air-side filter devices 8. In this case, it is possible for the predefinable power output ranges to overlap or overlap at their edges. The predeterminable power output ranges may correspond, for example, to a standby, a part load and a full load operation of the spray booth.

In der in der einzigen Figur nicht dargestellten Spritzkabine ist eine Heizeinrichtung 12, z.B. vorzugsweise in Form eines Brenners, vorgesehen. Mittels der Heizeinrichtung 12 kann die Temperatur innerhalb der Spritzkabine variiert werden. Hierzu ist die Heizeinrichtung 12 an die Steuervorrichtung 5 angeschlossen.In the spray booth, not shown in the single figure, a heating device 12, e.g. preferably in the form of a burner. By means of the heater 12, the temperature can be varied within the spray booth. For this purpose, the heating device 12 is connected to the control device 5.

Um eine Ausgangsgröße für die Steuerung bzw. Regelung der Heizeinrichtung 12 zu schaffen, ist im Zuluftkanal der in der einzigen Figur nicht dargestellten Spritzkabine ein Temperaturfühler 13 angeordnet, mittels dem die Temperatur des in die Spritzkabine eintretenden Zuluftstroms erfaßbar ist. Diese Temperatur dient als Ausgangsgröße für die Steuerung der Heizeinrichtung 12, um innerhalb der Spritzkabine das jeweils erforderliche bzw. gewünschte Temperaturniveau schnellstmöglich zu erreichen.In order to provide an output variable for the control or regulation of the heating device 12, a temperature sensor 13 is arranged in the supply air duct of the spray booth, not shown in the single figure, by means of which the temperature of the inlet air entering the spray booth can be detected. This temperature serves as an output variable for the control of the heating device 12 in order to achieve the respectively required or desired temperature level within the spray booth as quickly as possible.

In der Spritzkabine werden zu lackierende Bauteile mit zumindest einer Basislackschicht versehen, wobei nach Auftragen jeder Basislackschicht zunächst ein Zwischentrocknungsvorgang durchgeführt, bei dem kein weiterer Lack auf das Bauteil aufgespritzt wird.In the spray booth to be painted components are provided with at least one basecoat film, wherein after application of each basecoat film initially an intermediate drying process carried out in which no further paint is sprayed onto the component.

Mittels der Heizeinrichtung 12 und einer Reduzierung des Luftdurchsatzes kann zu Beginn eines derartigen Zwischentrocknungsvorgangs das Temperaturniveau innerhalb der Spritzkabine so eingestellt bzw. erhöht werden, daß die für den Zwischentrocknungsvorgang optimale Temperatur schnellstmöglich geschaffen wird.By means of the heating device 12 and a reduction in the air flow rate, the temperature level within the spray booth can be set or increased at the beginning of such an intermediate drying process so that the optimal temperature for the intermediate drying process is created as quickly as possible.

Selbstverständlich ist es auch möglich, sowohl für den Spritzvorgang als auch für den Brennvorgang, mit dem die Klar- oder Außenlackbeschichtung ausgehärtet wird, jeweils die optimale Temperatur kurzfristig innerhalb der Spritzkabine einzustellen.Of course it is also possible, both for the injection process as well as for the firing process, with which the clearcoat or exterior coating is cured, each set the optimum temperature within the spray booth for a short time.

Somit wird für jeden bei einer Lackierung eines Bauteils in der Spritzkabine anfallenden Verfahrensschritt das jeweils optimale Temperaturniveau innerhalb der Spritzkabine eingeregelt, so daß sich insgesamt eine Verkürzung des Lackiervorgangs mit einem damit einhergehenden reduzierten technisch-wirtschaftlichen Aufwand ergibt.Thus, for each occurring in a painting of a component in the spray booth process step each optimal temperature level is controlled within the spray booth, so that overall results in a shortening of the painting process with a concomitant reduced technical and economic effort.

Hierzu ist des weiteren die Steuervorrichtung 5 so ausgebildet, daß sowohl der Zuluftventilator 1 als auch der Abluftventilator 7 bei der Einleitung eines Zwischentrocknungsvorgangs automatisch mit einer niedrigeren Drehzahl betrieben werden. Der für den Betrieb der beiden Ventilatoren 1, 7 erforderliche Energieaufwand wird hierdurch erheblich reduziert.For this purpose, further, the control device 5 is designed so that both the supply air fan 1 and the exhaust fan 7 are automatically operated at the initiation of an intermediate drying operation at a lower speed. The energy required for the operation of the two fans 1, 7 is thereby significantly reduced.

Wie bei der prinzipiellen Darstellung in der einzigen Figur durch den Doppelpfeil 14 angedeutet, ist es möglich, durch eine in der einzigen Figur nicht dargestellte Leitungsanpasung bzw. -umschaltung den Zuluftventilator 1 und den Abluftventilator 7 während eines Zwischentrocknungsvorgangs im Umluftbetrieb zu fahren. Hierdurch kann die zur Durchführung des Zwischentrocknungsvorgangs nach einem Spritzvorgang erforderliche Temperaturerhöhung innerhalb der Spritzkabine in einem kürzeren Zeitraum herbeigeführt werden, wobei darüber hinaus der Energieaufwand zur Aufheizung der Luft in der Spritzkabine weiter reduziert werden kann.As indicated by the double arrow 14 in the basic figure in the single figure, it is possible by a line adaptation or switching not shown in the single figure to drive the supply air fan 1 and the exhaust fan 7 during an intermediate drying operation in the recirculation mode. As a result, the temperature increase within the spray booth required for carrying out the intermediate drying operation after an injection process can be brought about within a shorter period of time, wherein, moreover, the energy expenditure for heating the air in the spray booth can be further reduced.

Um in jedem Fall unerwünschte Staubaufwirbelungen u.dgl. zu vermeiden, ist die Steuervorrichtung 5 so ausgebildet, daß mittels ihr eine Drehzahländerung des Zuluftventilators 1 oder des Abluftventilators 7 in einem allmählichen Übergang durchgeführt wird, so daß Drehzahlsprünge in jedem Fall vermieden werden.To u.dgl in any case unwanted dust turbulence. to avoid, the control device 5 is designed so that by means of a speed change of the supply air fan 1 or the exhaust fan 7 is performed in a gradual transition, so that speed jumps are avoided in any case.

Der Steuervorrichtung 5 ist ein Schaltelement 15 zugeordnet, mittels dem an der Steuervorrichtung 5 ein entsprechend dem jeweiligen Anforderungsprofil variabler Sollwert einstellbar ist. Dieser Sollwert entspricht dem an den Zwischentrocknungsvorgang angepaßten Temperaturniveau, was innerhalb der Spritzkammer einzuhalten ist.The control device 5 is associated with a switching element 15, by means of which on the control device 5 a variable according to the respective requirement profile variable setpoint is adjustable. This setpoint corresponds to the adapted to the intermediate drying process temperature level, which is to be maintained within the injection chamber.

Claims (24)

  1. A ventilation device for a paint spray booth of a paint operation, including a supply air fan (1) for introducing supply air into the paint spray booth, an exhaust air fan (7) for evacuating the exhaust from the paint spray booth, filter devices (2, 8), via which contaminants can be prevented from getting into the paint spray booth and paint particles can be prevented from getting out of the spray booth, drive devices (4, 10), via which the supply air fan (1) and the exhaust air fan (7) are driveable, a heating device (12), via which the temperature in the paint spray booth can be changed, and a control device (5), via which the drive devices (4, 10) for the supply air fan (1) and the exhaust air fan (7) and the heating device (12) can be controlled, and via which a temperature level can be preset for the heating device (12) of the spray booth, which level is adapted to a spraying operation taking place inside the spray booth, characterised in that an additional temperature level can be preset via the control device (5) for the heating device (12) of the spray booth, and this temperature level is adapted to an intermediate drying stage of a base paint layer on a component to be painted in the spray booth, and that the supply air fan (1) and the exhaust air fan (7) can be operated at a lower speed automatically during an intermediate drying stage via the control device (5).
  2. The ventilation device in accordance with claim 1, wherein the control device (5) is designed such that the supply air fan (1) and the exhaust air fan (7) are operable in circulating mode during an intermediate drying operation.
  3. The ventilation device in accordance with either of claims 1 or 2, wherein the control device (5) is designed such that it is possible to change the speed of both the supply air fan (1) and the exhaust air fan (7) via a non-incremental, constant speed changing phase.
  4. The ventilation device in accordance with any of claims 1 to 3, wherein the control device (5) has a switching element (15), via which an adjustable setpoint value for the temperature level that is adapted to the intermediate drying operation can be preset at the control device (5).
  5. The ventilation device in accordance with any of claims 1 to 4, including a temperature sensor (13) that is disposed in the supply air duct to the paint spray booth and to which the control device (5) is connected.
  6. The ventilation device in accordance with any of claims 1 to 5, wherein the control device (5) is designed such that it can be used to preset a second temperature level for the heating device (12) of the paint spray booth, which temperature level is adapted to a spraying operation taking place in the paint spray booth.
  7. The ventilation device in accordance with any of claims 1 to 6, wherein the control device (5) is designed such that it can be used to preset a third temperature level for the heating device (12) of the paint spray booth, which temperature level is adapted to a curing operation for a top coat or clear varnish layer that is carried out in the paint spray booth.
  8. The ventilation device in accordance with claim 7, wherein the temperature level that is adapted to intermediate drying is between the temperature level that is adapted to the spraying operation and the temperature level that is adapted to the curing operation .
  9. The ventilation device in accordance with any of claims 1 to 8, wherein the drive device (10) of the exhaust air fan (7) is adjustable according to the contamination of the exhaust side of the filter device (8).
  10. The ventilation device in accordance with any of claims 1 to 9, wherein the drive device (4) of the supply air fan (1) is adjustable according to the contamination of the supply side of the filter device (2).
  11. The ventilation device in accordance with either of claims 9 or 10, wherein a parameter proportional to the contamination of the exhaust side filter device (8) and/or a parameter proportional to the contamination of the supply side filter device (2) can be entered at the control device (5) as input variables, and wherein the drive device (1) of the exhaust air fan (7) and/or the drive device (4) of the supply air fan (1) can be regulated via the control device (5) according to the contamination of the exhaust side and/or supply side filter device(s) (8, 2).
  12. The ventilation device in accordance with claim 11, wherein a pressure gauge (3) is situated inside the paint spray booth, via which the pressure in the paint spray booth can be entered in the control device (5) as a proportional parameter for the contamination of the exhaust side and/or the supply side filter device(s) (8, 2).
  13. The ventilation device in accordance with claim 12, wherein the pressure gauge (3) is constructed as a membrane pressure monitor.
  14. The ventilation device in accordance with any of claims 1 to 13, wherein each drive device (4, 10) has the form of an electric motor, the drive power of which can be regulated via a frequency converter (6, 9) disposed between the motor and the control device.
  15. The ventilation device in accordance with any of claims 11 to 14, wherein a step switch (11) is assigned to the control device (5), and via which different power output ranges can be preset for each drive device (4, 10), within which each drive device (4, 10) can be adjusted and regulated according to the contamination of the supply side and when necessary the exhaust side filter device(s) (2, 8).
  16. The ventilation device in accordance with claim 15, wherein the step switch (11) is configured as a three-stage switch, of which the first stage corresponds to a standby mode, the second stage corresponds to a partial load mode, and the third stage corresponds to a full load mode of the paint spray booth.
  17. A ventilation method for a paint spray booth of a paint operation, in which supply air is fed into the paint spray booth and exhaust air is evacuated from the paint spray booth, the flow of air is filtered as it enters the paint spray booth and as it is evacuated, the supply air and exhaust air flows are controlled separately, and the temperature in the paint spray booth is varied, characterised in that during an intermediate drying operation of a base paint layer on a component to be painted in the paint spray booth, a preset temperature level adapted to the intermediate drying is set, and that the supply air and exhaust air flows are reduced during the intermediate drying operation.
  18. The ventilation method in accordance with claim 17, wherein the supply air and exhaust air flows are merged in a circulating air flow during the intermediate drying operation.
  19. The ventilation method in accordance with either of claims 17 or 18, wherein changes to the supply and exhaust air flows are made constantly and smoothly.
  20. The ventilation method in accordance with any of claims 17 to 19, wherein the temperature of the supply air flow is measured and used as the basis for regulating the temperature in the paint spray booth.
  21. The ventilation method in accordance with any of claims 17 to 20, wherein a temperature level adapted to the spraying operation is set in the paint spray booth when a spraying operation is taking place inside the paint spray booth.
  22. The ventilation method in accordance with any of claims 17 to 21, wherein a temperature level adapted to the curing operation is set in the paint spray booth when a curing operation is taking place inside the paint spray booth.
  23. The ventilation method in accordance with any of claims 17 to 22, wherein the exhaust air flow is kept constant or changed regardless of the contamination of exhaust side filter devices (8).
  24. The ventilation method in accordance with any of claims 17 to 23, wherein the supply air flow is kept constant or changed regardless of the contamination of supply side filter devices (2).
EP01100802A 2001-01-15 2001-01-15 Ventilation system for a paint spray booth Expired - Lifetime EP1222968B9 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE50114835T DE50114835D1 (en) 2001-01-15 2001-01-15 Ventilation device for a spray booth of a paint shop
AT01100802T ATE428508T1 (en) 2001-01-15 2001-01-15 VENTILATION DEVICE FOR A SPRAY BOOTH OF A PAINTING PLANT
EP01100802A EP1222968B9 (en) 2001-01-15 2001-01-15 Ventilation system for a paint spray booth

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01100802A EP1222968B9 (en) 2001-01-15 2001-01-15 Ventilation system for a paint spray booth

Publications (3)

Publication Number Publication Date
EP1222968A1 EP1222968A1 (en) 2002-07-17
EP1222968B1 EP1222968B1 (en) 2009-04-15
EP1222968B9 true EP1222968B9 (en) 2009-09-23

Family

ID=8176207

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01100802A Expired - Lifetime EP1222968B9 (en) 2001-01-15 2001-01-15 Ventilation system for a paint spray booth

Country Status (3)

Country Link
EP (1) EP1222968B9 (en)
AT (1) ATE428508T1 (en)
DE (1) DE50114835D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2611980A1 (en) * 2005-06-15 2006-12-21 Noveo Technologies Inc. Variable exhaust control for spray booths
DE102009005079B4 (en) * 2009-01-16 2013-10-24 Daimler Ag Process for coating a component and coating device
DE102010021540A1 (en) * 2010-05-17 2011-11-17 Gerd Wurster Recirculated air spray booth

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3408087A1 (en) * 1984-03-05 1985-09-05 Viktor Durst Apparate und Behälter, 7129 Pfaffenhofen Spraying cabin for spraying and drying objects
DE4228660A1 (en) * 1992-08-28 1994-03-03 Alfred Feige Ventilation device for paint booths or the like
US5709038A (en) * 1993-09-24 1998-01-20 Optimum Air Corporation Automated air filtration and drying system for waterborne paint and industrial coatings
US5820456A (en) * 1996-10-24 1998-10-13 Sandy J. Pangle Paint spray booth
GB9702473D0 (en) * 1997-02-07 1997-03-26 Junair Spraybooths Ltd Spraybooth
DE29719614U1 (en) * 1997-11-05 1998-01-08 Bolin Heatex Technology Gmbh Ventilation device for a spray booth of a paint shop

Also Published As

Publication number Publication date
DE50114835D1 (en) 2009-05-28
EP1222968A1 (en) 2002-07-17
ATE428508T1 (en) 2009-05-15
EP1222968B1 (en) 2009-04-15

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