EP2844937B1 - Dispositif pourvu d'une chambre de traitement pour pièces d'oeuvre - Google Patents

Dispositif pourvu d'une chambre de traitement pour pièces d'oeuvre Download PDF

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Publication number
EP2844937B1
EP2844937B1 EP13720886.4A EP13720886A EP2844937B1 EP 2844937 B1 EP2844937 B1 EP 2844937B1 EP 13720886 A EP13720886 A EP 13720886A EP 2844937 B1 EP2844937 B1 EP 2844937B1
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EP
European Patent Office
Prior art keywords
receiving region
fluid
nozzle
air
gaseous fluid
Prior art date
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EP13720886.4A
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German (de)
English (en)
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EP2844937A1 (fr
EP2844937B2 (fr
Inventor
Dietmar Wieland
Oliver Iglauer
Christof KNÜSEL
Marius Winkler
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Duerr Systems AG
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Duerr Systems AG
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Application filed by Duerr Systems AG filed Critical Duerr Systems AG
Priority to PL18155194T priority Critical patent/PL3336467T3/pl
Priority to EP18155194.6A priority patent/EP3336467B1/fr
Publication of EP2844937A1 publication Critical patent/EP2844937A1/fr
Publication of EP2844937B1 publication Critical patent/EP2844937B1/fr
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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
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F26B15/14—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by trays or racks or receptacles, which may be connected to endless chains or belts
    • 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
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/008—Seals, locks, e.g. gas barriers or air curtains, for drying enclosures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/12—Vehicle bodies, e.g. after being painted
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/02—Heating arrangements using combustion heating
    • F26B23/022—Heating arrangements using combustion heating incinerating volatiles in the dryer exhaust gases, the produced hot gases being wholly, partly or not recycled into the drying enclosure

Definitions

  • the invention relates to a system with a process chamber having an interior space with a receiving area for workpieces and with an opening for the supply or removal of workpieces, with a device for blowing gaseous fluid into the interior, the at least one nozzle or orifice for generating a fluid flow curtain between the opening and the workpiece receiving area, and comprising means for circulating gaseous fluid in the receiving area through a recirculating air duct system communicating with the receiving area, comprising a flow channel leading into the receiving area and a receiving area connected to the receiving area Return channel has, in which the circulated gaseous fluid is passed through a means for tempering, in particular for the heating of gaseous fluid from the receiving area.
  • Such a plant is from the DE 24 54 091 A1 known.
  • This plant has a process chamber with an inlet opening and an outlet opening, in each of which there is a fluid flow curtain.
  • the fluid flow curtain here consists in part of fresh air, which can get into the interior of the process chamber.
  • WO 2010/122121 A1 is a plant for drying workpieces describe having a process chamber for the tempering of workpieces, which is closed at an inlet opening and at an outlet opening with a fluid flow curtain. The process chamber is also fed here with the fresh air from the fluid flow curtain.
  • the GB 2 123 936 A describes a plant for the drying of workpieces in a process chamber, which receives fresh air through a fluid flow curtain at the inlet opening and the outlet opening.
  • drying systems are used for the drying of freshly painted or coated with corrosion protection vehicle bodies. These systems have a process chamber designed as a dryer tunnel, into which hot air is blown. There is a drying zone in the dryer tunnel. The drying zone is a receiving area for workpieces in the form of vehicle bodies. To dry the vehicle bodies, they are moved on a conveyor through the dryer tunnel.
  • the lacquer layer or coating of the vehicle bodies to be dried can be adversely affected by impurities, in particular dust particles. Furthermore, gaseous fluid can escape through an opening for the feeding of workpieces and with this heat out of the interior.
  • the object of the invention is to provide a system with a process chamber having an interior with a receiving area for workpieces, which can be at least partially opened, in the simple means an efficient thermal separation of this interior space from the environment is possible and at the same time a sufficient supply of fresh air for the receiving area can be guaranteed.
  • fresh air is understood to mean, in particular, pre-compressed, heated and / or mechanically and / or mechanically cleaned and / or dried air with a filter whose state parameters are set as required.
  • Fresh air can z. B. also be processed exhaust air from a process chamber.
  • fresh air can also be the exhaust gas from a heat engine or internal combustion engine.
  • the invention is based on the idea that at least one airlock of a process chamber in a drying plant fulfills a double task: fresh air supplied in the airlocks, which generates a fresh air curtain, can on the one hand serve to separate the interior fluidically and / or thermally from the environment. On the other hand can be achieved with the fresh air of the fresh air curtain, that in drying processes in the process chamber released solvent is sufficiently diluted by this fresh air is eigespeist in the process chamber.
  • the inventors propose to separate this double task of the airlocks. It should be a guided in the process chamber volume flow be reduced or increased in fluid according to the utilization of the process chamber.
  • fresh air and / or recirculated exhaust air come into consideration as fluids. If a fresh air stream supplied to the process chamber of a drying plant is heated to a dryer temperature, adapting the fresh air volume flow to the utilization allows a temporary lowering of the fresh air volume flow below its maximum value and thus a lowering of the energy consumption.
  • the system has a device for circulating gaseous fluid in the receiving area through a circulating air line system communicating with the receiving area, which is guided out of the receiving area by a device for tempering, in particular for heating gaseous fluid.
  • the process chamber supplied fresh air can be z. B. before or behind a heat exchanger in the device for tempering in the recirculation system can be fed.
  • it is also possible to feed the fresh air in a line section of the circulating air duct system is guided by the circulating air from the process chamber to the means for tempering or can pass through the tempered in the means for tempering circulating air into the process chamber.
  • the system may also include means for supplying fresh air into the receiving area, which has at least one conduit with an opening for the intake of fresh air, which is connected to the circulating air duct system.
  • a circulating air blower can be used at low cost alternately or at the same time for the promotion of fresh air.
  • a flow control device is provided, wherein the flow control device is advantageously arranged in a flow channel or a return channel of the recirculation system.
  • the flow control device may, for. B. a throttle and / or a adjustable fan include.
  • a heat exchanger and / or a heater are further optionally provided, wherein the heat exchanger preferably transfers heat from an exhaust gas stream into a fresh air stream within the device for supplying fresh air into the receiving area and wherein a heating device preferably z. B. connected to a solar thermal system and / or with a gas burner.
  • the line with the opening for the intake of fresh air can in particular lead into a flow channel or return channel within the circulating air duct system.
  • the plant may also include means for supplying fresh air into the receiving area, which has at least one conduit with an opening for the intake of fresh air, which is connected directly to the process chamber.
  • the flow control device is preferably part of a (higher-level) control or regulating circuit, which supplies the receiving area with conditioned fluid, in particular with fresh air and possibly recirculated, treated exhaust air.
  • the flow control device can be directly or indirectly connected to a control or regulating circuit which contains a device for detecting a state parameter of the process chamber and controls or regulates the amount of introduced into the receiving area fresh air by means of the flow control device.
  • the process chamber in the plant can also be designed with a receiving area, which is subdivided into a first receiving area and a further receiving area, wherein the device for injecting gaseous fluid into the interior creates a fluid flow curtain between the first receiving area and the further receiving area.
  • the apparatus for injecting gaseous fluid into the interior of the process chamber includes at least one nozzle or at least one orifice for creating a fluid flow curtain between the opening and the workpiece receiving area.
  • the at least one nozzle or at least one aperture preferably serves as an outlet for air heated above ambient temperature and / or compressed over ambient pressure (or a correspondingly processed inert gas such as CO 2 or N 2 ).
  • the process chamber can, for. B. contain gaseous fluid whose temperature T is above 100 ° C and / or for which a temperature difference to the environment of the process chamber is more than 50 ° C.
  • fluid is flowed approximately vertically from top to bottom in the process chamber.
  • the fluid flowing in through the nozzle has a temperature which is higher or lower by more than 20 ° C. than the (approximately stationary) fluid contained in the process chamber.
  • the interior of the process chamber is preferably designed tunnel-shaped. He has a floor and a ceiling.
  • the at least one nozzle as a slot nozzle with a substantially rectangular outlet cross-section, the gaseous fluid can be supplied via the ceiling of the interior with a flow direction oblique with respect to the bottom, such that they point to the floor or entrance opening Side of the fluid flow curtain forms a flow roll of air, which is at least partially mixed with injected fluid.
  • the fluid flow curtain can be produced with a reduced expenditure of energy when the gaseous fluid injected into the interior via the at least one nozzle is guided on a guide contour which projects into the interior space. It is particularly advantageous if this guide contour can be pivoted. This makes it possible to adjust the fluid flow curtain with respect to the horizontal. Preferably, an angle between 80 ° and 50 ° between outflow and horizontal is set.
  • the fluid flow curtain When this angle is set between the outflow direction and the horizontal, the fluid flow curtain generates on its in the flow direction Seen bottom side, which faces to the bottom or to an opening, a flow roll.
  • the fluid flow of the fluid flow curtain pushes against the gaseous fluid that is in the region of the bottom of the process chamber.
  • the fluid flow of the fluid flow curtain overlaps and mixes with fluid exiting the process chamber in the region of the bottom. In particular, can be achieved by the pivoting of the lead contour that workpieces are not affected when entering the process chamber or at the exit.
  • a wall is arranged on the side facing the opening of the guide contour, which defines a diffuser with the guide contour, which contains a mixing chamber.
  • the diffuser is designed asymmetrically.
  • the mixing chamber in the diffuser is located on the upstream side of the fluid flow from the nozzle facing downwardly.
  • the mixing chamber is positioned in the diffuser such that fluid is mixed with air from the region of the opening on a side of the fluid flow curtain facing the opening (i.e., outwardly of the interior of the process chamber).
  • the air is sucked here by the flowing through the nozzle or the aperture, gaseous fluid into the roll.
  • the wall may have one or more openings for the passage of circulated air from the region of the opening.
  • an end wall is arranged on the side facing the input opening of the guide vane, which defines a retaining space with the guide contour, circulated air from the region of the inlet opening, which is directed in the region of the guide vane in an edge region of the interior, before escaping into the open be withheld.
  • the end wall conveniently has one or more openings for the passage of circulated air from the area of the inlet opening.
  • the at least one nozzle may include means for adjusting the flow rate of fluid passing through the nozzle.
  • the device for injecting gaseous fluid may include a heater for heating the gaseous fluid. This makes it possible to ensure that in the region of openings of the process chamber no condensate, z. B. condensation occurs.
  • the process chamber is suitable for use in a drying and / or curing plant. In particular, the process chamber can be integrated into a paint shop.
  • the fluid flow curtain is created with gaseous fluid which is pressurized and passed through a nozzle.
  • gaseous fluid which is pressurized and passed through a nozzle.
  • air from the region of an opening of the process chamber is admixed with the gaseous fluid flowing out of the nozzle.
  • the guided through the nozzle gaseous fluid is guided along a guide contour delimiting the mixing chamber.
  • This guide contour separates the mixing chamber from an auxiliary chamber, which acts as a dead space for gaseous fluid, arranged adjacently thereto.
  • the process chamber may be operated to throttle or interrupt a stream of gaseous fluid passing through a nozzle for creating a fluid flow curtain between the opening and the workpiece receiving area and / or changing the direction of the fluid flow curtain when a workpiece is moved through the opening. This ensures that the fluid flow curtain does not damage the surface of the coating of workpieces being moved in and out of the process chamber.
  • the plant 1 comprises a drying chamber 5 designed as a process chamber.
  • the dryer tunnel 5 is lined with sheet metal. It has an entrance lock 11 with an inlet opening 12 and an exit lock 13 with an outlet opening 14.
  • the dryer tunnel 5 comprises a drying zone 15 which lies between the entrance lock 11 and the exit lock 13.
  • the drying zone 15 is a receiving area for workpieces.
  • the drying zone 15 is preferably designed such that about fifteen vehicle bodies 3 freshly coated with a paint and / or a solvent can be dried more or less simultaneously.
  • a pitch of 5.2 m, thirty units per hour and 0.5 hr.
  • Dwell a tunnel length of 78 m (width b outside: 3 m to 4.6 m, height h outside: 2.8 m to 3.3 m).
  • the device 70 preferably contains a circulating air duct system 72 communicating with the drying zone 15.
  • the circulating air duct system 72 communicates with the receiving area 15 and has a feed channel 75 acting as a recirculating suckback channel and contains a return channel 77 which serves as a recirculation return channel for the recirculation of the circulating air.
  • the circulating air system 72 is guided by a heating device 63.
  • In the device 70 there is a fan 61, with which the air is blown to dry. With the device 70, the air in the drying zone 15 can be maintained in a circulating air operating state at a defined temperature.
  • the system 1 further preferably contains a device 74 and, alternatively or additionally, a device 74 'for the supply of fluid in the form of optionally also conditioned fresh air.
  • the device 74, 74 ' has a conduit 76, 76' with an opening 78, 78 'for the intake of fresh air.
  • a flow control device 80, 80' which is designed as a throttle valve.
  • the line 76, 76 ' is advantageously connected to the recirculation system 72.
  • a nozzle 17, 19 for generating a fluid flow curtain 21, 23.
  • the nozzles 17, 19 are acting via a fan acting as a compressor for fresh air 25, 27 through one above the ceiling 6 of the dryer tunnel 5 arranged chamber 29, 31 supplied with fresh air.
  • the nozzles 17, 19 preferably have a narrow slot-shaped opening 33, 35, which extends substantially across the width of the dryer tunnel 5 or over the width of the inlet and outlet openings 12, 14.
  • the slot-shaped opening 33, 35 of the nozzles 17, 19 opens into the interior 39 of the dryer tunnel 5.
  • the fluid flowing out of the nozzles 17, 19 is guided via a diffuser 16, 18 into the interior of the dryer tunnel 5.
  • the diffuser 16, 18 extends in front of the nozzles 17, 19 across the width of the inlet or outlet opening 12, 14.
  • the diffuser 16, 18 is designed asymmetrically with respect to the direction of the fluid flow curtain 21, 23 and is characterized by a baffle with a Leitkontur 211 and an end wall 215 limited.
  • the fluid flowing out of the nozzles 17, 19 is guided at the guide contour 211 of the guide plate into the interior of the dryer tunnel.
  • a temperature sensor 69, 71 is located on the guide contour 211.
  • the fluid flow curtain 21, 23 preferably extends in each case at an angle of 50 ° ⁇ ⁇ ⁇ 80 ° relative to the horizontal 37. It is directed into the interior 39 of the dryer tunnel 5.
  • the fluid flow flowing out of the nozzles 17, 19 widens up to the bottom 41 of the dryer tunnel 5.
  • the fluid flow curtain 21, 23 separates the gas atmosphere in the interior 39 of the dryer tunnel 5 from the ambient air 42.
  • a control device 45, 47 the fluid flow emerging from the nozzles 17, 19 is set to a predetermined shape.
  • a solvent sensor 73 is arranged in the drying zone 15.
  • a solvent sensor may be arranged in the exhaust air duct 65.
  • the nozzles 17, 19 supplied gaseous Fluid in the form of air is preheated in a heating device 43, 44 to a desired process temperature T soll , which is preferably in a temperature range 160 ° C ⁇ T soll ⁇ 250 ° C.
  • T soll a desired process temperature
  • the fluid flow curtain 21, 23 consists of fresh air, it can be ensured that a lower explosion limit for organic solvents in the drying zone 15 of the dryer tunnel 5 is not exceeded.
  • the preheating of the supplied fluid causes no condensation to form in the inlet lock 11 and the outlet lock 13 of the dryer tunnel 5.
  • fresh air can be introduced via the device 74 or 74 'into the drying section 15 if necessary.
  • the control device 45 For adjusting the amount of fresh air supplied via the device 74 or 74 'into the dryer tunnel 5, the control device 45 is connected to the flow control device 80. With the control device 45 via the line 76 and 76 'supplied fresh air is set to a predetermined value.
  • the adjustment of the fresh air supply takes place as a function of the detected by means of a sensor 49, 51 as a process chamber operating state parameter number per unit time by the drying zone 15 of the dryer tunnel 5 moving vehicle bodies and / or due to the signals of the temperature sensors 69, 71 and / or the solvent sensor 73rd and / or one or more other process chamber operating state parameters that allow statements about the composition of the gas atmosphere in the dryer tunnel 5 and thus the determination of the fresh air requirement when operating the dryer tunnel 5.
  • the fresh air supply is adjusted so that when operating the system 1, the so-called lower explosion limit of the composition of the gas atmosphere in the dryer tunnel 5 is not exceeded.
  • the plant 1 can be used as an alternative to the sensor 49 also a light barrier for determining the number of per unit time by the dryer tunnel 5 moving vehicle bodies are provided.
  • a measuring device with which the weight of the vehicle body 3 fed to the dryer tunnel 5 can be determined and / or provide a device with the size of the provided with a surface coating Surface of the vehicle bodies 3 can be detected.
  • the system 1 can also be equipped with a device for detecting a workpieces, z. B. the vehicle bodies 3 or even on a Skid 7 attached digital codes, eg. B. a bar code, the digital information about the size and nature of a workpiece, z. B. on a vehicle body 3 applied surface coating or on a particular type of workpiece contains.
  • the mass of a workpiece determined with the mass detection device is then applied to a specific workpiece, ie. H. closed a certain workpiece type.
  • a specific workpiece ie. H. closed a certain workpiece type.
  • this paint or coating amount is then applied to this paint or coating amount, and then assumed from this assumed paint or coating amount to a in the applied to the workpiece paint or the coating disposed thereon solvent amount.
  • a total amount of solvent can then be determined, which is introduced into the process chamber during the drying of workpieces. From this, the fresh air requirement for the process chamber can then be determined in order to operate it below the explosion limit.
  • a device for detecting the mass and quantity of workpieces according to the invention z. B. may be formed as a weighing device with which the number of weighing operations is detected.
  • a device for detecting a workpiece parameter in front of the process chamber In the remaining time to the entrance of a workpiece in the process chamber can then z. B. on the amount of introduced into the process chamber fresh air in the process chamber, a desired process temperature and / or a desired composition of the gas atmosphere can be adjusted.
  • thermal inertia of a plant described above is essentially due to the heat capacity of the process chamber and the size of the supplied and discharged from these amounts of air is determined.
  • control means 45 By connecting the aforementioned means to the control means 45, it is possible to control the composition of the gas atmosphere by adjusting the supply of fresh air according to the requirements of the vehicle bodies 3 arranged in the dryer tunnel 5, particularly considering the solvent content in the surface coating of the vehicle bodies 3 regulate.
  • the system 1 can thus z. B. operated in the following operating conditions:
  • the Fig. 2 is a sectional view of the entrance lock 11 of the drying plant 1 from Fig. 1 ,
  • the nozzle 17 in the entrance lock 11 is a slot nozzle.
  • the nozzle 17, the heated fresh air in the heater 44 via a pipe 201 is supplied.
  • the pipeline 201 opens into a chamber 203.
  • the fresh air is passed via air filter 205 and an obliquely arranged housing plate 206 to the nozzle 17.
  • the baffle 207 is fixedly connected to the housing plate 206.
  • the guide plate 207 and the housing plate 206 can be pivoted in the lock 11 about a rotation axis 208 in the direction of the arrow 214.
  • the pivoting of the baffle 207 with the housing plate 206 opens access to the filter 205 so that maintenance work can be performed there.
  • the nozzle 17 has a slot-shaped opening 209.
  • the slot-shaped opening 209 of the nozzle 17 is set back relative to the cover 6 of the dryer tunnel 5. This makes it possible to avoid impairments and damage of a not yet dried coating of vehicle bodies, which are moved through the entrance lock 11 into the dryer tunnel 5, even at high flow velocities of a fluid flow emerging from the nozzle 17.
  • Important for the avoidance of such damage is a comparatively large distance of the opening 209 of the nozzle 17 from the bottom 41 of the dryer tunnel 5. This can be achieved by a recessed arrangement of the nozzle 17 in the drying tunnel 5. This ensures that the momentum of the gaseous fluid flowing out of the nozzle 17 is already so much attenuated in the center of the dryer tunnel that corresponding coatings of vehicle bodies 3 through the fluid flow curtain 21 can not be damaged.
  • the fluid flow 210 emerging from the opening 209 of the nozzle 17 is guided into the interior of the dryer tunnel 5 along the contour 211 of a guide plate 207 acting as a guide wing.
  • the length L of the contour 211 of the baffle 207 preferably corresponds to 20 to 40 times the slot width B of the nozzle opening 209.
  • the end wall 215 is on the side of the contour 211 facing the inlet opening 213 of the dryer tunnel 5.
  • the end wall 215 extends over the width of the lock 11.
  • the end wall 215 delimits the contour 211, a ridge element 212 and the contour 211 of the guide plate 207, the diffuser 16.
  • the diffuser 16 is asymmetrical with respect to the main flow plane 202 of the fluid flowing out of the nozzle 17.
  • the main flow plane 202 and the contour of the baffle 211 are at an angle ⁇ to each other.
  • the mixing chamber 217 is set back relative to the cover 6 of the dryer tunnel 5.
  • the diffuser 16 with the mixing chamber 217 is located in the lock 11 above the inlet opening 213.
  • the mixing chamber 217 is adjacent to the inlet opening 213.
  • the baffle with the contour 211 separates the mixing chamber 217 from a secondary chamber 216.
  • the secondary chamber 216 opens into the interior 39 of the dryer tunnel 5.
  • the secondary chamber 216 forms a dead space for air from the dryer tunnel 5.
  • the on the back of the baffle with the Leitkontur 211 formed secondary chamber causes the fluid flow 210 is guided on the Leitkontur 211 due to the Coanda effect without stall.
  • the Fig. 3 is a three-dimensional view of the entrance lock 11 from Fig. 2 ,
  • the slot-shaped opening 209 of the nozzle 17 extends over the entire width of the inlet opening 213 of the dryer tunnel 5.
  • the slot-shaped Opening 209 of nozzle 17 is so narrow that the fluid flow exiting from nozzle 17 forms a fluid flow curtain over a wide flow range with different outlet speeds. This fluid flow prevents in particular an entry of dirt particles 301 from the environment in the Fig. 1 shown drying plant 1 in the interior of the dryer tunnel. 5
  • the Fig. 4 shows with arrows the flow conditions for air in the entrance lock 11 in the plane of a longitudinal section of the dryer tunnel 5 from Fig. 1 ,
  • the fresh air supplied to the dryer tunnel 5 via the slit-shaped nozzle 17 causes a fluid flow curtain 401 on the exit side of the nozzle 17.
  • the fluid flow curtain 401 extends from fresh air flowing in the direction of the arrows 402 in the form of a curved lobe 403 to the bottom 41 of the entrance lock 11.
  • the lobe 403 has the height H of the center of the entrance lock 11 has a thickness D, which is determined by the width B of the opening 209 of the nozzle 17.
  • the fresh air flowing out of the nozzle 17 generates a flow roller 407 of air.
  • the air flows around a center 409 in a flow direction indicated by the arrows 406.
  • the air in the region of the center 409 is substantially stationary.
  • the air circulated in the flow roll 407 is at least partially mixed with the fresh air blown through the nozzle 17.
  • the flow roll 407 extends from the bottom 41 to the ceiling 6 of the entrance lock 11th
  • a diffuser 16 is formed from the baffle 211 on the one hand and the front plate 215, which is arranged on the facing to the inlet opening 213 side of the baffle 211.
  • the diffuser 16 preferably absorbs part of the air circulated in the flow roller 407 within its mixing chamber 217. In the mixing chamber 217, this air becomes part of that flowing from the opening 209 of the nozzle 17 entrained and added gaseous fluid in the manner of a Venturi effect.
  • This increases the volume flow of the fluid flow curtain 401 in the area of the arrows 402.
  • the volume flow of the fluid flow curtain 401 can thus consist of 30% or more of gaseous fluid which is supplied to the fluid flow flowing out of the nozzle 17 via the mixing chamber 217. As a result, even with a comparatively small amount of injected fresh air, a fluid flow curtain 401 extending to the bottom 41 of the dryer tunnel 5 can be produced.
  • the air from the mixing chamber 217 is returned to the flow roll 407 in this way.
  • only a small portion of the gaseous fluid supplied via the nozzle 17 into the interior 39 of the dryer tunnel 5 leaves through the opening 213 of the lock 11 of the dryer tunnel 5.
  • the gaseous fluid flowing out of the nozzle 17 thus passes for the most part in the direction of the arrows 408 into the interior of the dryer tunnel 5.
  • a barrier is formed in the flow roller in the region of the opening 213 of the lock 11 407 circulated air generated. This barrier causes a thermal separation of the interior 39 of the dryer tunnel 5 from the outside area. In addition, this barrier also prevents the entry of dust and dirt particles into the interior 39 of the dryer tunnel 5.
  • the Fig. 5 shows a modified embodiment of a lock 501 for a drying plant.
  • the lock 501 has a nozzle 503 for supplying fresh air with a compared to the lock 11 from Fig. 1 modified nozzle geometry.
  • the nozzle 503 is a dual-chamber nozzle.
  • the nozzle 503 has a slot-shaped nozzle opening 505 and a slot-shaped nozzle opening 507, which extends in each case over the entire width of the ceiling 509 of the entrance lock 501.
  • the nozzle 503 comprises a pivotable control flap 511.
  • the control flap 511 is movable by means of a spindle drive not shown. Suitable for moving the control flap but also an adjustment mechanism with shaft or a cable.
  • the fresh air supplied to the nozzle 503 through the chamber 513 can be selectively directed either through the nozzle opening 507, the nozzle opening 509, or through the nozzle openings 507, 509.
  • the control flap 511 it is possible to vary the air flow from the nozzle 503 according to the position of vehicle bodies in the region of the entrance opening of a dryer tunnel. With this measure it can be achieved that a paint layer applied to a vehicle body is not impaired by the fluid flow formed by the fresh air from the nozzle 503.
  • the thickness D of the fluid flow curtain and thus the amount and / or the speed of the supplied fresh air into the interior of the dryer tunnel can be adjusted.
  • a nozzle with a plurality of nozzle openings and with a plurality of control valves can be provided to set a fresh air flow for a dryer tunnel.
  • the Fig. 6 shows a portion of an alternative embodiment for a lock 601 with a nozzle 603 to form an air curtain in the entrance or exit area of a drying plant.
  • the nozzle 603 in the lock 601 is associated with a guide plate 605 which acts as a guide wing and which is preferably pivotably arranged.
  • the baffle optionally has an at least partially curved outer contour. In particular, it extends over the entire width of the nozzle 603.
  • the pivotable baffle 605 at the opening 607 of the nozzle 603 is pivotally mounted on the ceiling 608 of the lock 601 at a pivot 615.
  • the pivotable baffle 605 protrudes into the interior 611 of the lock 601.
  • the length L of the contour of the baffle 605 corresponds approximately to 20- to 40-fold the slot width B of the nozzle opening.
  • the swiveling baffle 605 opposite, in turn, an end wall 609 is disposed in the lock 601.
  • the guide plate 605 is associated with a not shown actuator.
  • By pivoting the baffle 605 according to the double arrow 617 it is possible to set an angle of attack ⁇ with respect to the horizontal 616 and thus the direction of a fluid flow curtain generated in the sluice 601 with gaseous fluid from the nozzle 603.
  • By pivoting the guide plate 605 is displaced, on which the gaseous fluid flowing from the nozzle 607 is guided.
  • it is possible to change the shape of the flow roll which is formed on the side of the guide plate 605 facing the opening 619 of the lock 601 due to the fluid flowing out of the nozzle 603.
  • the baffle 605 By the baffle 605 is pivoted to the ceiling 608 of the lock 601, a comparatively shallow flow of gaseous fluid into the lock can be effected.
  • the guide plate 605 up and down By moving the guide plate 605 up and down, the flow direction of the fluid flowing out of the nozzle can be adapted to the position and geometry of vehicle bodies, which are moved through the lock 601 into the interior of the dryer tunnel.
  • the fluid flowing out of the nozzle is not deflected from the vehicle bodies to the opening 619 and a paint layer applied to vehicle bodies which is to be dried in the drying tunnel will not be fumed and will not be damaged in the dryer tunnel.
  • the Fig. 7 shows a portion of another alternative embodiment for a lock 701 with a nozzle 703 to form an air curtain in the entrance or exit area of a drying plant.
  • the Nozzle 703 opens into a diffuser section, which adjoins the narrowed cross section of the nozzle and thus widens the flow cross section for the fluid.
  • the nozzle 703 with adjoining diffuser section thus has a flow channel 704, whose cross-section extends toward the interior 711 of the lock 701 into a volume acting as a diffuser, in which a mixing chamber 713 is located.
  • the structure of the lock 701 otherwise corresponds to that of the lock 601 Fig. 6 , Corresponding assemblies of the lock 601 and 701 are therefore in Fig. 7 with compared to Fig. 6 indicated by the number 100 increased reference numerals.
  • the lock 701 has an end wall 709 with one or more inlet openings for ambient air.
  • the end wall 709 openings in the form of a sieve-like perforation. This measure also makes it possible to draw in air from an upper region 721 in the vicinity of the lock 701.
  • the air sucked into the lock 701 in this way is preferably mixed with air from a flow roll which forms at the opening of the lock. Subsequently, the sucked air and a part of the air from the flow roll are mixed in the exiting from the diffuser fluid flow.
  • the Fig. 8 shows a portion of another alternative embodiment for a lock 801 with an aperture 803 having an opening 804 for forming an air curtain in the entrance or exit area of a drying plant.
  • the construction of the lock 801 corresponds to that of the lock 701 Fig. 7 , Corresponding modules of the lock 701 and 801 are therefore in Fig. 8 with compared to Fig. 7 indicated by the number 100 increased reference numerals.
  • the end wall 809, the ridge member 812 and the baffle 805 also define a diffuser that includes a mixing chamber.
  • the end wall 809 of the lock 801 is designed with a recess 816. This measure also allows the intake of air from an upper region 821 of the vicinity of the lock 801 into the flow roll generated by the orifice 803 at the opening of the lock.
  • the Fig. 9 shows a cross section of an entrance or exit lock 901 of a dryer tunnel 900 in a drying plant with a vehicle body 912.
  • the lock 901 has slot-shaped nozzles 903, 905, 907, which are located on the ceiling 910 of the lock 901.
  • the nozzles 903, 905, 907 can be acted upon by a device for supplying fresh air, not shown, with a fresh air stream 909.
  • the lock 901 there are control valves, by means of which the fresh air stream 909 can be divided into different channels 911, 913 and 915 for the separate pressurization of the nozzles 903, 905 and 907 with fresh air.
  • This measure allows the setting of a fluid flow curtain 917 at the openings of a dryer tunnel, which corresponds to the passage of workpieces, for. B. vehicle bodies over the width B of the opening can be set differently.
  • the Fig. 10 shows a longitudinal section of another lock 1011 for a dryer tunnel in a plant for drying metallic workpieces. According to the Fig. 4 are here also the flow conditions for air in the lock 1011 indicated by arrows.
  • the fresh air supplied to the dryer tunnel via the slot-shaped nozzle 1017 causes a fluid flow curtain 1401 on the exit side of the nozzle 1017.
  • the fluid flow curtain 1401 extends (preferably from fresh air flowing in the direction of the arrows 1402) in the form of a more or less curved lobe 1403 in the direction of a bottom 1041 of the lock 1011.
  • the fresh air flowing from the nozzle 1017 generates a flow roll 1407 from air.
  • the air flows around a center 1409 in a flow direction indicated by the arrows 1406.
  • the air in the region of the center 1409 is substantially stationary.
  • the air circulated in the flow roll 1407 is at least partially mixed with the fresh air blown through the nozzle 1017.
  • the flow roll 1407 extends from the floor 1041 to the ceiling 1006 of the entrance lock 1011.
  • the lock 1011 has an arcuate ridge wall 1215 on the side of a guide rail 1211 which faces the input opening 1213.
  • the guide plate 1211 and the ridge wall 1215 delimit and partially surround a diffuser 1210 with a downwardly open mixing chamber 1217.
  • a flow guiding element 1218 is positioned in the form of a "flow wing", which, like the opening 1009 of the nozzle 1017, preferably extends over the entire width of the lock 1011.
  • the baffle 1211 separates the diffuser 1210 from a secondary chamber 1216.
  • the secondary chamber 1216 acts as dead space for air having lower flow velocities than the rest of the lock (except for the actual negligible center of rotation 1409 of the flow roll).
  • a silhouette wall 1220 is arranged in the region of the opening 1213.
  • Silhouettenwandung 1220 serves in particular as a flow barrier or as a bottom-side flow guide.
  • the silhouette wall 1220 is preferably made of spring steel or other temperature and / or corrosion resistant steels.
  • the silhouette wall 1220 can be pivoted about a (horizontal) axis 1222 according to the arrow 1224.
  • the mixing chamber 1217 absorbs a small part of the air circulated in the flow roll 1407.
  • this air is directed with the flow vane 1218 due to a venturi effect to the gaseous fluid flowing out of the opening 1209 of the nozzle 17. It is entrained by the gaseous fluid.
  • This increases the volume flow of the fluid flow curtain 1401 in the area of the arrows 1402.
  • the volume flow of the fluid flow curtain 1401 can thus consist to a large extent of gaseous fluid which is supplied to the fluid flow from the nozzle 1017 via the mixing chamber 1217. As a result, even with a comparatively small amount of injected fresh air, a fluid flow curtain 1401 extending to the bottom 1041 of the dryer tunnel can be produced.
  • the air from the mixing chamber 1217 is returned to the flow roll 1407 in this way.
  • the gaseous fluid flowing out of the nozzle 1017 thus passes for the most part in the direction of the arrows 1408 into the interior of the dryer tunnel.
  • a barrier with air circulated in the flow roller 1407 is generated in the region of the opening 1213 of the lock 1011, which thermally separates the interior 1039 of the dryer tunnel from the outside area and, moreover, also an entry of dust and dirt particles into the drying tunnel.
  • the silhouette wall 1220 at the bottom 1041 of the lock 1011 causes the flow roll 1407 to be comparatively narrow. Only when a workpiece is moved into the dryer tunnel, the silhouette wall according to the arrow 1220 is briefly folded in the direction of the bottom 1041. It should be noted that alternatively or additionally, a foldable silhouette wall corresponding to the silhouette wall 1220 can also be arranged in the upper region of the entry opening.
  • the in the Fig. 11 Plant for the drying of vehicle bodies 2003 shown has a process chamber in the form of a dryer tunnel 2005.
  • the dryer tunnel 2005 is formed with an inlet lock 2011, an intermediate lock 2012 and an outlet lock 2013.
  • the intermediate lock 2012 separates a first drying section 2015a from a further drying section 2015b as receiving areas for the motor vehicle bodies, which is adjoined as a further receiving area for motor vehicle bodies by a holding zone 2016, which is arranged in front of the outlet lock 2013.
  • the structure of the locks 2011 and 2013 corresponds to the structure of the entrance or exit lock 11, 13 in the in the Fig. 1 shown Appendix 1 for drying.
  • a nozzle 2014 for generating a fluid flow curtain 2021 of fresh air, which is directed obliquely into the interior of the dryer tunnel 2005.
  • One or more nozzles 2014 are combined with a diffuser 2018, in particular the diffuser is located adjacent to the nozzle outlet and is formed asymmetrically to a main flow plane through the associated nozzle.
  • the intermediate lock 2012 has a nozzle 2009, which generates a fluid flow curtain 2020.
  • a modified embodiment of the plant 2001 can also be carried out without asymmetric diffusers in the nozzles, such as when the tightness of the locks reduced demands are made. For example, a mechanical closing of the corresponding locks can be provided.
  • the plant 2001 contains a heating device 2023 designed as a device for the thermal exhaust air cleaning with a line 2025 for supplying hot clean gas from the dryer tunnel 2005 and a heat exchanger 2027, which is used for heating exhaust air from the dryer tunnel 2005.
  • the exhaust air heated out of the dryer tunnel 2005 in the heat exchanger 2027 can be combusted in a combustion chamber 2029 of the heater 2023 with or without the addition of additional fuel.
  • the heater 2023 supplies heat to a plurality of heat transfer devices 2031, 2033, 2035, 2037 through a hot gas line 2036 acting as a clean gas line.
  • the heat transfer devices 2031, 2033 and 2035 are coupled in a row one behind the other to the hot gas line 2036.
  • the heat transfer devices 2031, 2033, 2035 are preferably carried out largely similar.
  • the device 2037 includes an air / air heat exchanger and is coupled as the last of the heat transfer devices to the hot gas line 2036.
  • the device 2037 is used for the temperature control of the fresh air, which is guided to the nozzles 2014 for generating the fluid flow curtain 2021 from fresh air.
  • the devices 2031, 2033 and 2035 each contain a heat exchanger 2039 connected to the hot gas line 2036 with a hot gas line 2038 and are designed for circulating circulating air in the drying sections 2015a, 2015b and in the holding zone 2016.
  • the circulating air is tempered, which is guided through a recirculating air duct system 2041 communicating with the receiving areas 2015a, 2015b and 2016 with a recirculating return suction duct 2041a for extracting recirculated air from the drying tunnel 2005 and a circulating air supply duct 2041b for introducing recirculated air into the drying tunnel 2005 is.
  • the facilities 2043 for supplying additional fresh air into the receiving areas of the dryer tunnel 2005.
  • the facilities 2043 have conduits 2045 provided with a receiving area in communicating with the dryer tunnel 2005 and containing a throttle control flow controller 2047.
  • the flow control device 2047 may alternatively or additionally also be equipped with a blower. Fresh air is supplied to the devices 2031, 2033, 2035 via the lines 2045 when the fresh air supplied through the nozzles 2014 to the dryer tunnel 2005 is insufficient to cover the fresh air requirement within the dryer tunnel.
  • the plant 2001 contains a control device 2046.
  • the control device 2046 is connected to a first device 2051 for detecting a state parameter of the drying chamber 2005 acting as a process chamber in the plant 2001.
  • a state parameter of the drying chamber 2005 acting as a process chamber in the plant 2001.
  • adjustment of the butterfly valves 2052, 2055 in the lines 2038 for passing hot gas through the heat exchangers 2039 and adjustment of the butterfly valves 2047 in the lines 2045 for supplying fresh air by means of potentiometers or limit switches are detected. From this, it is possible to determine a quantity of fluid supplied to the drying tunnel 2005 per unit of time using the devices 2031, 2033, 2035 and 2037. In this way, optionally, a quantity of heat supplied with the fluid can again be ascertained if the fluid temperatures are measured via temperature sensors assigned via the lines of a circulating-air line system 2041 and a line 2045.
  • control device 2046 is connected to a second device 2053 for detecting a state parameter of the drying chamber 2005 acting as a process chamber in the installation 2001.
  • the device 2053 is designed as a body counting device with which the number of motor vehicle bodies 2003 moved per time unit into the drying tunnel 2005 and thus the quantity of the motor vehicle bodies 2003 arranged in the drying tunnel 2005 can be determined.
  • the controller 2046 is also connected to a temperature sensor 2007 for detecting the hot gas temperature T A in the hot gas line 2036.
  • the temperature sensor 2007 is used for measuring the temperature of the flowing through the hot gas line 2036 hot gas outlet side of the heat transfer device 2037, with the hot gas from the plant 2001 is released as pure gas to the environment (clean gas above-roof temperature).
  • the control circuit 2046 is connected to a control module 2056 for adjusting the rotational speed of a fan 2057 disposed in the conduit 2025 and another control module 2059 for adjusting the rotational speed of a fan 2061 which is for drawing fresh air into the conduit 2019 to the one fluid flow curtain 2021 producing nozzles 2009 in the dryer tunnel 2005.
  • the flow control devices 2047 in the means 2043 for supplying fresh air and the speed of the fan 2057 are then determined by means of the control circuit 2046 as a function of the value determined by means 2051 for the amount of heat supplied to the dryer tunnel 2005 per unit time and the number determined by means 2053 set in 2003 arranged in the interior of the dryer tunnel 2005 bodies.
  • a plurality of measured variables are combined in the control device 2046 as a state parameter (process chamber operating state parameter).
  • state parameter process chamber operating state parameter
  • So z. B. also detected by means of the temperature sensor 2007 clean gas above-roof temperature as a primary measure and an adjustment of the throttle 2052, 2055 for adjusting the hot gas flow in the hot gas lines 2036, 2038 (clean gas flap position) are detected as a secondary measure
  • the primary measured variable serves to determine a fresh air - exhaust air volume flow and the secondary measured variable of the review, confirmation and / or, if necessary, correction of this fresh air-exhaust air volume flow.
  • variable fresh air flow rate is kept constant or increased until the positions of all clean gas flap positions are again below a predetermined value, when the position of the clean gas flap positions exceeds said set value, which depends on the overall system and between 50 % and 100% opening degree can be. In particular, it can be ensured with such a combination of several measured variables that a sufficient amount of heat is contained in the dryer tunnel 2005 of the plant 2001.
  • a constant fresh air volume flow through the locks 2011, 2012 and / or 2013 supplied.
  • additional fresh air is introduced into the process chamber by opening flow control devices 2047 configured as throttle valves in the lines 2045 via the heat exchanger devices 2031, 2033, 2035 and / or 2037.
  • a third operating mode the state of utilization of the plant 2001 of, for example, 91% ⁇ A ⁇ 100% in relation to the maximum possible capacity on workpieces in the process chamber designed as a dryer tunnel, a constant fresh air volume flow is supplied via the locks 2011, 2012 and / or 2013, and the flow of the additional fresh air supplied in the heat transfer devices 2013, 2033, 2035 and / or 2037 with respect to the second mode of operation, additional opening of the flow control devices 2047 is further increased.
  • system 2001 can also be operated in other operating modes in which the flow control devices 2047 in the lines 2045 have a different opening position with respect to the aforementioned operating modes.
  • a stepless change in the operating mode of the plant 2001 is basically possible.
  • a fan can also be arranged in the line 2045 for fresh air.
  • the fresh air on the side facing the interior of the dryer tunnel 2005 side of a fluid flow curtain 2021 in a lock 2011, 2013, 2015 of the Appendix 2001 is supplied.
  • fresh air can also be conveyed through the line branch 2045b in the heat transfer device 2037 into the line 2019 by means of the fan 2061 into the line 2045.
  • the fresh air conveyed by means of the fan 2061 is then not or only partially guided through the heat exchanger 2039 in the heat transfer device 2037.
  • the fresh air guided in the line 2019 is introduced into the plant 2001 'in the heat transfer devices 2031, 2033 and 2035 such that it passes into the dryer tunnel 2005 via the heat exchangers arranged in the heat transfer devices 2031, 2033 and 2035.
  • the introduced into the heat transfer devices 2031, 2033 and 2035 fresh air from the line 2045 can thus be heated with heat from the guided in the hot gas line 2036 clean gas.
  • a flow measuring device 2062 is arranged in the line section 2019 a of the plant 2001 '.
  • the flow measuring device 2062 controls an actuator in a flow control device 2048.
  • a flow control device 2048 controls an actuator in a flow control device 2048.
  • the flow measuring devices 2062, 2063 determine the amount of fresh air fed into the line 2019, 2045 by means of the fan 2061 by detecting the pressure drop at a diaphragm arranged in the line section with the flow meter 2062, 2063. It should be noted that the flow meter 2062, 2063 for detecting the flow of fresh air may alternatively include a magnetic inductive sensor, an ultrasonic measuring unit or an impeller.
  • the Fig. 13 shows a further plant 2001 "for drying, the structure of which is substantially identical to the structure of the plant 2001 described above"
  • Fig. 12 and the Fig. 13 The systems shown are functionally identical, they have in Fig. 12 and Fig. 13 the same numbers as reference numerals.
  • the fresh air is fed to the outlet side of the heat exchanger 2039 in the circulating air duct system 2041 through the fresh air supply line 2045, 2033 and 2035.
  • a heat exchanger 2039 of a heat transfer device 2031, 2033, 2035 Then only the supplied through a supply channel 2041 a circulating air is heated from the dryer tunnel 2005.
  • Fig. 14 and Fig. 15 show further plants in 2001 '"and 2001""for drying, the structure of which is based on the Fig. 12 and Fig. 13 corresponds described plant. Functionally identical modules in these systems again have the same reference numerals as the corresponding modules of the systems Fig. 12 and Fig. 13 , In the plant 2001 '''fresh air is introduced via the line 2045 outside the heat transfer devices 2031, 2033 and 2035 in the return air return passage 2041b of the line system.
  • the line 2045 for supplying fresh air into the dryer tunnel 2005 is connected to a recirculation return suction channel 2041a of the piping system 2041, through which the recirculated air from the drying tunnel 2005 is fed into a heat transfer device 2031, 2033 and 2035.
  • the in the Fig. 16 System 3001 for drying vehicle bodies 3003 has a plurality of temperature sensors 3070, 3072, 3074 and 3076 as a device for detecting a state parameter of a dryer tunnel 3005 acting as a process chamber.
  • the modules in the system 3001 are concerned with the modules in the system 2001 Fig. 11 functionally equivalent, these are in the Fig. 12 with respect to the Fig. 11 indicated by the number 1000 increased numbers as reference numerals.
  • the temperature sensors 3070, 3072, 3074 and 3076 are connected to the controller 3046.
  • the temperature sensor 3070 is disposed in the hot gas passage 3026 between the heater 3023 and the heat transfer device 3031.
  • the temperature sensor 3072 is located in an end portion of the hot gas duct 3026 from which the clean gas flowing through the hot gas duct 3026 enters the environmental atmosphere.
  • the control device 3046 controls the speed of the fan 3057 in the line 3025 and the setting of the flow control devices 3047 for adjusting the amount of fresh air fed into the line system 3041 as a function of the temperature sensors 3070, 3072, 3074 and 3076 detected temperature difference .DELTA.T H , .DELTA.T U.
  • the controller 3046 may also be implemented as a closed loop that controls the speed of the fan 3057 in the conduit 3025 and the adjustment of the flow controller 3047 based on the signal from the temperature sensors 3070, 3072, 3074, and 3076.
  • Plant 4001 for drying vehicle bodies 4003 has a scale 4078 for determining the mass of vehicle bodies 4003 supplied to dryer tunnel 4005 as a device for detecting a condition parameter of a dryer tunnel 4005 acting as a process chamber.
  • a scale 4078 for determining the mass of vehicle bodies 4003 supplied to dryer tunnel 4005 as a device for detecting a condition parameter of a dryer tunnel 4005 acting as a process chamber.
  • the controller 4046 controls the rotational speed of the fan 4057 in the conduit 4025 and the adjustment of the flow control devices 4047 for adjusting the amount of fresh air fed into the piping 4041 depending on the mass of the vehicle bodies 4003 supplied to the dryer tunnel 4005 by the balance 4078.
  • a process chamber 5, 2005 has an interior 39 with a receiving area 15, 2015a, 2015b, 2016 for workpieces 3, 2003.
  • the process chamber 5, 2005 has an opening 12, 14, 2015 , 2017 for the feeding or removal of workpieces 3, 2003.
  • the process chamber 5, 2005 is equipped with a device 17, 19, 25, 29, 33, 37, 35, 2014 for the injection of gaseous Fluid formed in the interior 39, the at least one nozzle 17, 19, 2014 or aperture 803 for generating a fluid flow curtain 21, 23, 2021 between the opening 12, 14, 2015, 2017 and the receiving area 15, 2015a, 2015b for workpieces 3rd , 2003.
  • the process chamber 5, 2005 has a device 74, 2043 for supplying fresh air, with the on a side facing away from the opening 12, 14, 2015, 2017 side of the fluid flow curtain 21, 23, 2021 introduced into the receiving area 15, 2015a, 2015b fresh air can be.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Furnace Details (AREA)
  • Ventilation (AREA)

Claims (14)

  1. Installation (1, 2001) pourvue d'une chambre de traitement (5, 2005), qui comprend un espace intérieur (39) avec une zone de réception (15, 2015a, 2015b, 2016) pour des pièces d'oeuvre (3, 2003) et qui comporte une ouverture (12, 14, 2015, 2017) pour l'admission et l'évacuation de pièces d'oeuvre (3, 2003); et
    un dispositif (17, 19, 25, 29, 33, 37, 35, 2014) pour l'insufflation de fluide gazeux dans l'espace intérieur (39), qui présente au moins une buse (17, 19, 2014) ou un obturateur (803) pour la production d'un rideau de courant de fluide (21, 23, 2021) entre l'ouverture (12, 14, 2015, 2017) et la zone de réception (15, 2015a, 2015b) pour des pièces d'oeuvre (3, 2003),
    avec un dispositif (70, 2031, 2033, 2035) pour faire circuler du fluide gazeux dans la zone de réception (15, 2015a, 2015b) au moyen d'un système de conduites de circulation d'air (72, 2041) communicant avec la zone de réception (15, 2015a, 2015b), qui comporte un canal d'arrivée (75) débouchant dans la zone de réception (15) et un canal de retour (77) raccordé à la zone de réception, dans lequel le fluide gazeux en circulation est guidé hors de la zone de réception (15, 2015a, 2015b) par un dispositif (2031, 2033) pour le réglage de la température, en particulier pour le chauffage de fluide gazeux,
    caractérisée en ce que
    le dispositif (70, 2031, 2033, 2035) pour faire circuler du fluide gazeux dans la zone de réception (15, 2015a, 2015b) est relié à un dispositif (74, 2043) pour la fourniture d'air frais,
    avec lequel de l'air frais peut être introduit dans la zone de réception (15, 2015a, 2015b) sur un côté du rideau de courant de fluide (21, 23, 2021) situé à l'opposé de l'ouverture (12, 14, 2015, 2017) et qui comprend pour la fourniture d'air frais au moins une conduite (78, 2045) communicant avec la zone de réception (15, 2015a, 2015b), qui présente une ouverture pour l'aspiration d'air frais et qui comporte un dispositif de commande de débit (80, 2047).
  2. Installation selon la revendication 1, caractérisée en ce que la conduite (76) débouche avec l'ouverture (78) pour l'aspiration d'air frais dans un canal de retour d'air de circulation (77) dans le système de conduites de circulation d'air (72).
  3. Installation selon la revendication 1 ou 2, caractérisée en ce que le dispositif de commande de débit (80, 2047) est relié à un circuit de commande ou de régulation (45, 2049), qui reçoit le signal d'un dispositif (49, 69, 73, 2051) pour la détection d'un paramètre d'état de la chambre de traitement (5, 2005) et qui commande ou régule la quantité d'air frais introduite dans la zone de réception (15) par le dispositif pour la fourniture d'air frais au moyen du dispositif de commande de débit (80, 2047) en fonction d'au moins un paramètre d'état détecté.
  4. Installation selon la revendication 3, caractérisée en ce que le dispositif (2051) est conçu pour la détection d'un paramètre d'état de la chambre de traitement (5, 2005) choisi dans le groupe indiqué ci-dessous:
    i. teneur en carbone et/ou teneur en solvant de l'atmosphère dans la zone de réception (2015a, 2015b, 2016);
    ii. nombre et/ou poids et/ou type et/ou grandeur de la surface de pièces d'oeuvre (2003) disposées dans la zone de réception;
    iii. nombre et/ou poids et/ou type et/ou grandeur de la surface de pièces d'oeuvre (2003) fournies à la zone de réception par unité de temps;
    iv. température de l'air d'échappement de la chambre de combustion (2029) d'un brûleur dans un dispositif pour régler la température de l'air de circulation;
    v. différence de température de fluide gazeux, qui est prélevé dans la zone de réception (2015a) et qui est de nouveau fourni à la zone de réception (2015a);
    vi. différence de température de fluide gazeux provenant de la zone de réception (2015a), qui est fourni à une chambre de combustion (2029) d'un brûleur dans un dispositif pour régler la température de l'air de circulation, et de l'air d'échappement de la chambre de combustion (2029) du brûleur;
    vii. quantité de chaleur par unité de temps, qui est fournie à la chambre de traitement (2005).
  5. Installation selon l'une quelconque des revendications 1 à 4, caractérisée en ce que l'espace intérieur (39) est configuré en forme de tunnel et présente un fond (41) et un plafond (6), dans laquelle ladite au moins une buse (17, 19) ou ledit au moins un obturateur (803) a la forme d'une fente, qui fournit le fluide gazeux dans l'espace intérieur (39) via le plafond (6) avec une direction d'écoulement (402) oblique par rapport au fond (41), et le fluide gazeux fourni dans l'espace intérieur (39) produit sur le côté du rideau de courant de fluide (21, 23) tourné vers l'ouverture (12, 14) un rouleau d'écoulement (407) d'air, qui est au moins en partie mélangé à du fluide insufflé.
  6. Installation selon la revendication 5, caractérisée en ce que le fluide gazeux fourni dans l'espace intérieur (39) est de l'air frais et/ou en ce que le fluide gazeux insufflé dans l'espace intérieur (39) par ladite au moins une buse (17, 19) ou par ledit au moins un obturateur (803) est guidé dans l'espace intérieur (39) par un diffuseur (16, 2018), dans laquelle le fluide gazeux insufflé dans l'espace intérieur (39) par le diffuseur (16, 2018) est guidé sur un contour de guidage (606) dans l'espace intérieur (39).
  7. Installation selon la revendication 6, caractérisée en ce que le contour de guidage (606) est formé sur une aube directrice pivotante (605).
  8. Installation selon la revendication 6 ou 7, caractérisée en ce qu'une paroi (215, 1215) est disposée sur le côté du contour de guidage (211, 1211) tournée vers l'ouverture (213, 1213), qui définit avec le contour de guidage (211, 1211) un diffuseur (16, 18) avec une chambre de mélange (217, 1217), dans laquelle du fluide provenant du rouleau d'écoulement (407, 1407) est mélangé à de l'air provenant de la région de l'ouverture (213, 1213).
  9. Installation selon la revendication 8, caractérisée en ce qu'une chambre secondaire (216) faisant office d'espace mort pour du fluide gazeux est formée sur un côté du contour de guidage (211) situé à l'opposé de la chambre de mélange (217), et/ou en ce qu'une aube directrice (1218) est disposée dans la chambre de mélange (1217), et est abordée par du fluide gazeux provenant du rouleau d'écoulement (1407) et renvoie le fluide du rouleau d'écoulement (1407) dans le rideau de courant de fluide (1401).
  10. Installation selon l'une quelconque des revendications 1 à 9, caractérisée en ce que le dispositif de commande de débit comprend un clapet d'étranglement (80, 2047) et/ou une soufflante réglable, et/ou
    en ce que la zone de réception est divisée en une première zone de réception (2015a) et une autre zone de réception (2015b) et le dispositif (2014) pour l'insufflation de fluide gazeux dans l'espace intérieur produit le rideau de courant de fluide (2021) entre la première zone de réception (2015a) et l'autre zone de réception (2015b), et/ou
    en ce que ladite au moins une buse (503) présente un dispositif (511) pour le réglage de la quantité d'écoulement de fluide traversant la buse (503) et/ou en ce qu'il est prévu plusieurs buses (903, 905, 907) avec un dispositif pour le réglage de la quantité d'écoulement de fluide traversant la buse, afin de régler différemment le rideau de courant de fluide entre l'ouverture d'entrée et la zone de réception pour des pièces d'oeuvre (912) dans différentes parties, et/ou
    en ce qu'il est prévu pour la commande d'un écoulement de fluide formé dans l'espace intérieur (1039) une barrière d'écoulement pivotante (1220), et/ou
    en ce que le dispositif pour l'insufflation de fluide gazeux présente un dispositif de chauffage (43, 44) pour le chauffage du fluide gazeux, et/ou
    en ce que l'installation est constituée par une installation de séchage et/ou de durcissement et/ou de laquage.
  11. Procédé pour faire fonctionner une installation selon l'une quelconque des revendications 1 à 10, dans lequel on guide un fluide gazeux mis sous pression à travers la buse (17, 19) ou l'obturateur (803) pour produire le rideau de courant de fluide (21, 23, 2021) et dans lequel on mélange dans une chambre de mélange (217) disposée à proximité de la buse (17, 19) de l'air provenant de la région d'une ouverture (213) ou de l'espace intérieur (39) de la chambre de traitement (5) avec le fluide gazeux sortant de la buse (17, 19).
  12. Procédé selon la revendication 11, caractérisé en ce que l'on guide le fluide gazeux guidé à travers la buse (17, 19) le long d'un contour de guidage (211) limitant la chambre de mélange (217), qui sépare en particulier la chambre de mélange (217) d'une chambre secondaire (216) disposée à proximité de celle-ci et faisant office d'espace mort pour du fluide gazeux.
  13. Procédé pour faire fonctionner une installation selon la revendication 11 ou 12, dans lequel on étrangle ou on interrompt un courant de fluide gazeux guidé à travers la buse (17, 19) ou l'obturateur (803) pour la production d'un rideau de courant de fluide (21, 23) entre l'ouverture (12, 14) et la zone de réception (15) pour des pièces d'oeuvre (3) et/ou dans lequel on change la direction du rideau de courant de fluide (21, 23) lorsqu'une pièce d'oeuvre (3) est déplacée à travers l'ouverture (12, 14).
  14. Procédé selon l'une quelconque des revendications 11 à 13, dans lequel on produit le rideau de courant de fluide (21, 23, 2021) avec une quantité d'air frais restant constante en moyenne temporelle sur une période de temps, que l'on guide à travers la buse (17, 19) ou l'obturateur (803), et dans lequel on ajoute avec le dispositif (74, 2043) pour l'introduction d'air frais dans l'espace intérieur (39) pendant la période de temps une quantité variable d'air frais, que l'on commande ou que l'on régule en fonction d'un paramètre d'état de la chambre de traitement choisi dans le groupe indiqué ci-dessous:
    i. teneur en carbone et/ou teneur en solvant de l'atmosphère dans la zone de réception (2015a, 2015b, 2016);
    ii. nombre et/ou poids de pièces d'oeuvre (2003) disposées dans la zone de réception;
    iii. nombre et/ou poids de pièces d'oeuvre (2003) fournies à la zone de réception par unité de temps;
    iv. température de l'air d'échappement de la chambre de combustion (2029) d'un brûleur dans un dispositif pour régler la température de l'air de circulation;
    v. différence de température de fluide gazeux, qui est prélevé dans la zone de réception (2015a) et qui est de nouveau fourni à la zone de réception (2015a);
    vi. différence de température de fluide gazeux provenant de la zone de réception (2015a), qui est fourni à une chambre de combustion (2029) d'un brûleur dans un dispositif pour régler la température de l'air de circulation, et de l'air d'échappement de la chambre de combustion (2029) du brûleur;
    vii. quantité de chaleur par unité de temps, qui est fournie à la chambre de traitement (2005).
EP13720886.4A 2012-05-02 2013-04-26 Dispositif pourvu d'une chambre de traitement pour pièces d'oeuvre Active EP2844937B2 (fr)

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PL18155194T PL3336467T3 (pl) 2012-05-02 2013-04-26 Instalacja z komorą procesową dla przedmiotów obrabianych
EP18155194.6A EP3336467B1 (fr) 2012-05-02 2013-04-26 Dispositif pourvu d'une chambre de traitement pour pièces d'oeuvre

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DE201210207312 DE102012207312A1 (de) 2012-05-02 2012-05-02 Prozesskammer mit Vorrichtung zum Einblasen von gasförmigem Fluid
PCT/EP2013/058817 WO2013164285A1 (fr) 2012-05-02 2013-04-26 Dispositif pourvu d'une chambre de traitement pour pièces à usiner

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EP18155194.6A Division-Into EP3336467B1 (fr) 2012-05-02 2013-04-26 Dispositif pourvu d'une chambre de traitement pour pièces d'oeuvre

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US (1) US9423179B2 (fr)
EP (2) EP2844937B2 (fr)
CN (1) CN104583699B (fr)
BR (1) BR112014024884B1 (fr)
DE (1) DE102012207312A1 (fr)
ES (1) ES2705601T3 (fr)
IN (1) IN2014DN07532A (fr)
PL (1) PL3336467T3 (fr)
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EP3336467B1 (fr) 2018-10-24
DE102012207312A1 (de) 2013-11-07
WO2013164285A1 (fr) 2013-11-07
IN2014DN07532A (fr) 2015-04-24
US9423179B2 (en) 2016-08-23
PL3336467T3 (pl) 2019-04-30
EP3336467A1 (fr) 2018-06-20
CN104583699A (zh) 2015-04-29
EP2844937A1 (fr) 2015-03-11
ES2705601T3 (es) 2019-03-26
BR112014024884B1 (pt) 2021-04-06
EP2844937B2 (fr) 2023-05-03
PT3336467T (pt) 2019-01-28
US20150121720A1 (en) 2015-05-07
TR201820376T4 (tr) 2019-02-21
CN104583699B (zh) 2017-03-15

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