EP2368642A1 - Dispositif d'aération pour installations de laquage par pulvérisation - Google Patents

Dispositif d'aération pour installations de laquage par pulvérisation Download PDF

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Publication number
EP2368642A1
EP2368642A1 EP10005634A EP10005634A EP2368642A1 EP 2368642 A1 EP2368642 A1 EP 2368642A1 EP 10005634 A EP10005634 A EP 10005634A EP 10005634 A EP10005634 A EP 10005634A EP 2368642 A1 EP2368642 A1 EP 2368642A1
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EP
European Patent Office
Prior art keywords
coating material
control
exhaust air
ventilation device
spray booth
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.)
Granted
Application number
EP10005634A
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German (de)
English (en)
Other versions
EP2368642B1 (fr
Inventor
Thomas Dipl.-Ing. Pilz
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Individual
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Individual
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Publication date
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Publication of EP2368642A1 publication Critical patent/EP2368642A1/fr
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Publication of EP2368642B1 publication Critical patent/EP2368642B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm
    • B05B12/006—Pressure or flow rate sensors

Definitions

  • the present invention relates to a ventilation device for spray painting systems according to the preamble of claim 1 and spray painting systems according to the preamble of claim 8.
  • a coating material by spraying namely, for example, with primers, basecoat films, paint layers, outer paint layers, clearcoat films, sealing layers and the like.
  • the spraying of the coating material is usually done manually by means of spray guns, which are usually acted upon with compressed air and coating material, in which case the coating material is entrained in the compressed air jet until it impinges on the surface to be coated.
  • control device specifically controls the performance of the supply air and exhaust air devices depending on whether a spray coating is ever made or not. For this purpose, it is checked by means of a compressed air-controlled switch, whether necessary for the injection process compressed air is removed. When a flow of air is detected, a certain fan power is set and, in the absence of compressed air flow, fan power is reduced to a reduced level.
  • the reduced fan power is set only after a certain time to safely remove any existing overspray from the spray booth.
  • Object of the present invention is therefore to provide a ventilation device for spray painting, with which the energy consumption can be further reduced.
  • an even more accurate demand-driven fan performance is to be ensured.
  • a Spritzlackierstrom should be provided.
  • the inventor has found, surprisingly, that the hitherto conventional control of the fan power via the compressed air flow can not be correlated precisely enough with the forming overspray. This may be due to the fact that the amount of overspray does not correlate with the amount of compressed air used. This means that with the same overspray different amounts of compressed air can be present, so that the measurement of the amount of compressed air can not be used to exact statements about the overspray conditions in the spray booth. Such a case is e.g. when using the airless spray method, where little or no compressed air is used for the paint spraying.
  • the inventor has solved the hitherto conventional compressed air quantity measurement and proposes according to the invention the measurement of the coating material flow for controlling the fan power.
  • the ventilation device for spray painting systems with at least one spray booth, in the coating material is sprayed onto objects to be coated, thus has at least one air supply device for acting on the spray booth with supply air, at least one exhaust device for removing exhaust air from the spray booth, drive means for driving the Zu Kunststoff- and the exhaust air devices and a control device for controlling the supply air and exhaust air devices, and is characterized in that the control device is adapted to use the coating material flow as a control variable for controlling the supply air and / or exhaust air devices.
  • independent protection is claimed for the ventilation method for spray painting systems with at least one spray booth in which coating material is sprayed onto articles to be coated, in which the spray booth is supplied with supply air and exhaust air is discharged from the spray booth, wherein the supply air and the exhaust air flows by means of a control device be controlled, which is characterized in that the control device uses the coating material flow as a control variable for controlling the supply air and / or exhaust air.
  • the operation of the one or more spray guns serves as an input to the controller, for example, to control discrete fan power, such as full load, partial load, standby and off.
  • the supply air and exhaust air devices on motor-driven fans and / or pumps, so that the admission of supply air and the discharge of the Exhaust air is done with these motor-driven fans.
  • the control device is adapted for the separate control of the supply air and exhaust air devices, so that the supply air and exhaust air flows can be controlled separately by means of the control device.
  • At least one frequency converter with different discrete frequencies is provided, the output frequency of which can be controlled discretely for stepwise regulation of the motor power of the motor-driven fans and / or pumps as a function of the control variable.
  • different power levels such as full load, partial load, standby and off can be defined, these levels can now be controlled more precisely.
  • the motors used in the supply air and / or exhaust air devices are multi-layered, in particular two-stage, with regard to their performance.
  • the motor power of the motor-driven fans and / or pumps is controlled stepwise discretely, whereby of course one or more frequency converters can be used, but also any other suitable control.
  • At least one frequency converter is provided, the output frequency of which is continuously controllable in dependence on the control variable for continuously controlling the motor power of the motor-driven fans and / or pumps. Then the fan or pump power can be controlled very precisely, namely analogously to the overspray volume, so that the overspraysink speed is ensured with always minimal fan power.
  • this infinitely variable frequency converter can advantageously also have discretely adjustable frequencies.
  • the engine power of the motor-driven fans and / or pumps is driven continuously, of course, one or more frequency can be used, but also any other suitable control.
  • a flow quantity detector for example based on ultrasound or the Coriolis force, is used to determine the flow of coating material, since this determination then takes place very precisely.
  • the spray booth has at least two sections which can be ventilated separately from one another and the control device is adapted to separately control the supply air and exhaust air devices assigned to each section as a function of the flow of coating material in the individual sections. Then, on the one hand, in different sections due to the shaping of the object to be coated differently occurring overspray can be reacted. On the other hand, for smaller objects, the entire spray booth does not always have to be operated so that the fan performance can be specifically adapted to the size of the object.
  • a ventilation process for spray painting with at least one spray booth in the coating material is sprayed onto objects to be coated, in which the spray booth supplied with supply air and exhaust air is discharged from the spray booth, the Zu Kunststoff- and the exhaust air flows by means of a Control device preferably be controlled separately, wherein the admission of supply air and the discharge of the exhaust air takes place in particular with motor-driven fans, wherein the control device uses the coating material flow as a control variable for controlling the supply air and exhaust air devices.
  • the motor power of the motor-driven fans and / or pumps is controlled in stages in a discrete manner as a function of setpoint values of the control variable.
  • the flow of coating material is determined by ultrasound measurement or by measuring the Coriolis force and thus the control variable is generated.
  • the spray booth has at least two sections which can be ventilated separately from one another and in each section the associated supply air and exhaust air are separately controlled in dependence on the flow of coating material in the individual sections.
  • control device is adapted to use the viscosity of the coating material as a control variable for controlling the supply air and / or exhaust air devices. Then it is ensured that the performance is particularly reliable adapted to the actual resulting overspray. It is advantageous if at least one viscosity detector is provided to determine the viscosity.
  • Fig. 1 is purely schematic of the spray booth 1 used in the invention shown in a plan view.
  • the spray booth 1 which is provided for the painting of rail vehicles, has two sections 2, 3, which are arranged horizontally separated within the spray booth 1 and, for example, by a roller door 4 or the like. From each other are spatially separable.
  • Within the spray booth 1 on opposite walls two over almost the entire length and the height of the spray booth 1 movable stages 5, 6 are provided, on which workers by means of spray guns not shown objects (not shown), which are located inside the spray booth 1 with Coating coating material can.
  • filter devices for the removal of overspray occurring during the spraying process, in the ceiling of the spray booth 1 filter devices (not shown) are provided with filters and in the bottom with filters, e.g. Staubabscheidevorraumen, provided exhaust air devices (not shown), which are each designed as a motor-driven fans.
  • the fan power is adapted, for example, in the first section 2 of the spray booth 110,000 m3 / h air exchange and in the second section 3 55,000 m3 / h.
  • a uniform Zu poverty is used with a two-stage engine power of 40 kW and 115 kW and for the exhaust device in the first section 2 is an engine power of 75 kW and for the exhaust device in the second section, a motor power of 37 kW.
  • the uniform Zu Kunststofftechnik is preferably provided that this is closed with blinds or the like. Connections with two sections 2, 3 separately to supply each section defined supply air.
  • Fig. 2 is now shown purely schematically the control 10 of the spray booth 1 in a first preferred embodiment.
  • coating material from a container 12 can be fed to a first spray gun 11 assigned in the first section 2.
  • a second spray gun 13 assigned to the second section 3 can be supplied with coating material from a second container 14.
  • Both spray guns are without (eg airless method) or with compressed air (not shown) acted upon to deliver coating material, as indicated by the arrows.
  • ultrasound coating material flow detectors 15, 16 are for example provided, which supply their measured variables to a control device 17 as control variables.
  • the signals received via the control device 17 drive four frequency converters 18, 19, 20, 21, wherein the first frequency converter 18 controls the engine of the feeder, the second frequency converter 19 controls the engine of the exhaust air device for the first section 2, the third frequency converter 20 the motor the exhaust device for the second section 3 and the fourth frequency converter 21 controls the motor of the pump for the wet dedusting device, ie the filter device of the exhaust device.
  • the control 10 is now operated as follows. If only one of the two detectors 15, 16 detects a flow of coating material, then the first frequency converter 18 is controlled so that the engine of the air supply device is moved to partial load. At the same time, depending on which detector 15, 16 detects the flow, the motor of the exhaust air device associated with the respective section is switched on via the respective frequency converter 19, 20. In order to take into account a possible movement of the platforms 5, 6 into the respective other section, it may advantageously be provided that when the platform 5, 6 is moved into the respective other section 2, 3, for example by means of overflow detectors, the respective other exhaust device is actuated.
  • both detectors 15, 16 detect a coating material flow, then the engine of the air supply device in the full load stage at full power and via the second and third frequency converter 19, 20 both motors of the exhaust air devices are switched on the first frequency.
  • both detectors 15, 16 do not detect any flow of coating material, then all the motors are switched off via the first, second and third frequency converters 18, 19, 20.
  • the respective controlled frequency converter 18, 19, 20 are operated with a short acceleration, when the signal switches to detection of coating material flow, and operated with long delay, when the signal switched to detection of no coating material flow.
  • overspray overhangs are considered at the end of the injection process.
  • the supply air can be supplied via a suitable e.g. modulating heating source (not shown) are heated, in which case temperatures of about 20 ° C to 24 ° C are common, but of course other temperatures can be used, depending on the coating material.
  • a suitable e.g. modulating heating source (not shown) are heated, in which case temperatures of about 20 ° C to 24 ° C are common, but of course other temperatures can be used, depending on the coating material.
  • the heat source via the control device 17 is driven. Namely, that it is turned on when responding at least one of the detectors 15, 16 but otherwise is turned off.
  • a step of tempering the applied coating or the tempering of the spray booth 1 by means of the heated supply air can be provided for the operation and / or tempering of the spray booth 1.
  • the first frequency converter 18 is operated in standby mode, the heating source and the respective exhaust air motors are turned on, but the pump for the wet dedusting device is turned off.
  • the first frequency converter 18 has discrete control frequencies of e.g. 40 Hz, 30 Hz, 20 Hz or 0 Hz.
  • a second embodiment of the actuator 30 is shown purely schematically, wherein the same and similar elements as shown in the first embodiment according to Fig. 2 are provided with the same or similar reference numerals.
  • the exact structure and the functional description is essentially based on the representations Fig. 1 referred to below and only the differences.
  • a unitary detector 15 detects a flow of coating material which is stored in, for example, a central container 12'.
  • the modulating heat source 31, which can heat the supply air, and the temperature detector 32, which determines the temperature of the supply air, are also shown here.
  • the corresponding second or third frequency converter 19, 20 are driven to operate the corresponding motors and the first frequency converter 18 switches the engine of the air supply device to partial load.
  • the heating source 31 is operated in dependence on the temperature value determined via the temperature detector 32 so that the temperature of the supply air is maintained at a desired value.
  • the pump of the wet dedusting device is turned on via the fourth frequency converter 21.
  • the operation of the spray booth 1 has been described with fixed, ie discrete, performances for the motors via the first, second and third frequency converters 18, 19, 20 through the detection of a flow of coating material, in principle determining only the fact whether there is a flow of coating material or Not. This is much more precise than the determination of a Durklufthnes, since even with existing compressed air flow not necessarily a coating must be connected to an overspray.
  • the exact flow of coating material is utilized as a control variable in order to set the engine power of all fan motors specifically to predetermined values, that is, to control discrete power levels.
  • an exact analog i. continuous control of the respective engine performance via the determination of the exact coating material flows done by continuously, depending on the respective coating material flow of the first, second and third frequency converter 18, 19, 20 are controlled.
  • the engine of the wet dedusting device can also be steplessly controlled.
  • frequency converters (18, 19, 20, 21) have been described in the context of controlling the motor power of the motorized fans and / or pumps in dependence on the control variable, such frequency converters (18, 19, 20, 21) can of course also be used for controlling the power of any other drive device of the supply air and / or exhaust air devices are used.
  • the fan power is specially adapted to the viscosity of the coating material.
  • the mixture of colorant and solvent is considered as the coating material.
  • special viscosity meters (not shown) in the supply lines between the coating material container 12, 12 ', 14 and spray guns 11, 13 are provided which make a fine control of the fan line. This means that the preset load levels are separately regulated in their services via the viscosity detection.
  • fan performance may increase higher-viscosity coating material compared to those with lower viscosity can be reduced.
  • This type of air flow control and regulation ensures that paint mist and solvents are sorted and discharged there only with the required effort where they arise during painting.
  • the energy consumption of the system is considerably reduced.
  • the exact air flow rates are set during commissioning and fine-tuning, for example according to the specification 0.3 m / s sink rate for the overspray.
  • typically about 60% of the electrical energy and about 50% of the heat energy can be saved.
  • spray painting can be operated energetically much more optimized, so that the overall coating can be done more cost-effective. While the foregoing has always referred to spray painting equipment, it will be understood that ventilation apparatus and methods are also contemplated for spray coating equipment operating with spray guns 11, 13, and the like, which are not coated with paints, but with other coating materials such as paints. Powder coatings work. Even if the presented spray booth 1 has two sections 2, 3, the spray booth according to the invention can also have only one or numerous sections. The ventilation device according to the invention can always be used advantageously.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
EP10005634A 2010-01-19 2010-05-31 Dispositif d'aération pour installations de laquage par pulvérisation Not-in-force EP2368642B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202010001169U DE202010001169U1 (de) 2010-01-19 2010-01-19 Belüftungsvorrichtung für Spritzlackieranlagen

Publications (2)

Publication Number Publication Date
EP2368642A1 true EP2368642A1 (fr) 2011-09-28
EP2368642B1 EP2368642B1 (fr) 2013-03-20

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EP10005634A Not-in-force EP2368642B1 (fr) 2010-01-19 2010-05-31 Dispositif d'aération pour installations de laquage par pulvérisation

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EP (1) EP2368642B1 (fr)
DE (1) DE202010001169U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2762239A1 (fr) * 2013-01-30 2014-08-06 Cefla Deutschland GmbH Dispositif d'application de peinture

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0480664A2 (fr) * 1990-10-09 1992-04-15 Nordson Corporation Perfectionnements aux cabines de poudrage à ventilation modulée pour le revêtement des véhicules automobiles
EP0899018A1 (fr) * 1997-09-01 1999-03-03 Wagner International Ag Réseau de contrÔle d'une installation de revêtement
EP0899022A1 (fr) * 1997-09-01 1999-03-03 Wagner International Ag Méthode de commande d'un système d'évacuation d'une installation de poudrage électrostatique et installation de poudrage électrostatique
GB2341444A (en) * 1998-09-08 2000-03-15 Ford Global Tech Inc Paint booth airflow control system
WO2006133551A1 (fr) 2005-06-15 2006-12-21 Noveo Technologies Inc. Commande d’evacuation variable pour des cabines de peinture

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0480664A2 (fr) * 1990-10-09 1992-04-15 Nordson Corporation Perfectionnements aux cabines de poudrage à ventilation modulée pour le revêtement des véhicules automobiles
EP0899018A1 (fr) * 1997-09-01 1999-03-03 Wagner International Ag Réseau de contrÔle d'une installation de revêtement
EP0899022A1 (fr) * 1997-09-01 1999-03-03 Wagner International Ag Méthode de commande d'un système d'évacuation d'une installation de poudrage électrostatique et installation de poudrage électrostatique
GB2341444A (en) * 1998-09-08 2000-03-15 Ford Global Tech Inc Paint booth airflow control system
WO2006133551A1 (fr) 2005-06-15 2006-12-21 Noveo Technologies Inc. Commande d’evacuation variable pour des cabines de peinture

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2762239A1 (fr) * 2013-01-30 2014-08-06 Cefla Deutschland GmbH Dispositif d'application de peinture
EP2762239B1 (fr) 2013-01-30 2017-01-04 Cefla Deutschland GmbH Dispositif d'application de peinture
US10150129B2 (en) 2013-01-30 2018-12-11 Cefla Deutschland Gmbh Paint application device

Also Published As

Publication number Publication date
DE202010001169U1 (de) 2010-04-08
EP2368642B1 (fr) 2013-03-20

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