EP0849001A1 - Spray booth and air circulation system for a workspace - Google Patents

Abstract

In vehicle spraying booths (1), air is supplied to and discharged from the inner chamber (1a) by an air feeding device. The air supplied is conditioned so that its temperature lies in a desired temperature range and air pollution limit values can be ensured for a person working in the inner chamber (1). A displacement device (10) with a vehicle receiving region that can be moved in at least one direction of displacement in the spraying booth (1) is arranged in the spraying booth (1). This reduces the required booth width to the sum of the width required for working and the width of the vehicle being sprayed, and the required booth length to the length of the vehicle being treated. In order to direct air between the air feeding device (20) and desired areas of the chamber, at least two air supply regions (21b, 23b; 21b', 23b') in communication with ducts (21-23) of the air feeding device (20) and provided with closable openings (18) into the inner chamber (1a) are located in at least one horizontal chamber delimiting region. The openings (18) open into uniformly distributed areas of the chamber. Openings (18) of each air supply zone (21b, 23b; 21b', 23b') are located in each area of the chamber, and thus each area of the chamber can communicate with each air supply zone (21b, 23b; 21b', 23b'). The smaller size of the booth and the directed air currents make it possible to reduce fresh air throughput and the energy required to heat the fresh air.

Description

The invention relates to a spray booth after Preamble of claim 1 and a circulation system according to the preamble of claim 7.

For applying paints and varnishes to large objects, In particular cars are mostly sprayed, which are carried out in spray booths. Around Overspray and in particular released solvents To discharge the interior of the spray booth becomes a circulation flow the air stimulated by the cabin. Thereby can cause high concentrations of pollutants in the interior be prevented. Even if those working in the cabin It is mandatory for people to wear protective masks to always supply the interior or work space with fresh air. Before the fresh or outside air flows in, it is brought to a desired temperature. In the winter, or at low outside temperatures, the fresh air in addition, for example, from an outside temperature of 0 ° C be warmed up to approx. 20 ° C to room temperature. In summer or at high outside temperatures, the fresh air would have to the desired room temperature can be cooled.

The size of the spray booths is so close to the medium size of the objects to be processed, that around the in central area of the interior placed objects a work area remains free, which it allows the workforce allows the object to be sprayed from all sides. Spray booths for passenger cars have a base with a length of essentially at least 7m and one Width of at least 4m. One to edit Vehicle is moving in the direction of the cabin's longitudinal axis through a short side wall designed as an entrance gate placed in the center of the interior. The car is there held on a grate under which an exhaust air filter is. An exhaust air duct is formed under the exhaust air filter, through which the exhaust air flowing through the filter layer an air drive device can flow. To under the Cabin floor space for the exhaust air filter and the exhaust air duct To be able to provide the known spray booths a 60cm deep foundation.

The cabin ceiling includes a grate, one on top of it lying supply air or fresh air filter and one above Air duct, the air from the air drive device to Top of the fresh air filter leads. The entry of air through the fresh air filter and the outflow of air through the exhaust air filter must be selected so that the Air in the interior sinks as turbulently as possible. Turbulence, or deviations from a laminar lowering of the air, lead to increased dwell times of partial air quantities, which also contains paint particles and solvents can enrich.

In the case of essentially evenly sinking air, lowering speeds of 0.25 m / s are provided. For cabins with a cross section of 28m ² (7m x 4m), the air flow rate is 7m ³ / s or 25,000m ³ / h. In order to be able to heat these large air throughput quantities sufficiently, a heating device with a large heating capacity, in particular in the region of 300 kW, must be installed. In order to reduce the amount of heat required, systems were built in which the fresh air is mixed with up to 50% exhaust air and then the mixed air is introduced into the cabin. The exhaust air is already at the desired temperature and therefore does not need to be heated. The use of mixed air increases the proportion of solvent in the work area.

Another known measure to reduce the required Amount of heat is that part of the heat energy the exhaust air in a heat exchanger to the inflowing Fresh air is transmitted. But it turns out that the required heat output even with the known solutions Heat exchangers are still so high that they are with one Burner must be generated. The use of burners leads to a high approval and investment effort because a fuel supply, a safe combustion chamber and flue gas discharge or a chimney is necessary. An electric one Heater would have an electrical connection with large wire cross sections. The installing such a connection is associated with high costs and it is also questionable whether such a high electrical Power for heating purposes would be approved at all. In addition the expected electricity costs lead to very high operating costs.

The object of the invention is now a cheap Find spray booth with low energy consumption enough good for a person working in the cabin, or tolerated, creates air conditions.

The task is solved by realizing the Features of claim 1 and claim 7.

When solving the task, it was recognized that the big one Heat energy consumption significantly through the horizontal Cross-section, or the base of the spray booth interior given is. The air flow through the interior is the product of the horizontal cross-sectional area with the desired lowering speed. The lowering speed should be above 0.15m / s, preferably at substantially 0.20m / s so that the overspray and solvent vapors be executed quickly enough from the interior. Around the air throughput and thus the one to be heated if necessary The horizontal should now reduce fresh air content Cross-sectional area of the interior can be reduced. So that the cross-sectional reduction work around does not obstruct the object to be sprayed or the vehicle, the spray booth according to the invention comprises a Moving device that the object or the vehicle in the spray booth.

The displacement device comprises at least one receiving area, on which the object or the vehicle, in particular with the wheels. The recording area is movable in the spray booth at least in one direction, the mobility, if necessary, in particular by rolling Swivel castors, but preferably by a first guide device is guaranteed. The first guide device preferably comprises at least two, in particular, transverse to the longitudinal axis of the cabin, Rails on the cabin floor or with their ends are attached to the cabin walls. Is on the rails a trolley with rollers running on the rails or Movable wheels arranged. The recording area is, if applicable firmly connected to the trolley, preferably but is between the trolley and the receiving area formed a second guide device which Makes the recording area movable on the trolley.

In the case of a trolley guided on rails, there can be between the rails are arranged a floor surface that only must have a low load capacity, and in particular one Isolation function can have, so that the conduction Heat flow through the floor becomes minimal.

The direction of displacement of the second guide device is preferably orthogonal to the direction of displacement the first guide device so that the object or the passenger car with the receiving area essentially can be moved anywhere within the cabin. For work on the left or right side of the vehicle Vehicle moved so that its right or left side is arranged close to a cabin wall. With a shifting device with two guide devices can be used accordingly the front or rear of the vehicle into one Cabin wall to be moved. Through the sliding device it is thus guaranteed that to process each Part of the vehicle a sufficiently large work area is available.

The required cabin width thus essentially results from the sum of a working width required for working and the width of the objects or vehicles to be processed. A cabin width of essentially 3 m and a cabin length of essentially 6 m are therefore sufficient for the common passenger cars. By providing a sliding device, the cabin cross-section can be reduced to 18m ² - two thirds of the common cross-section. Accordingly, the air throughput is reduced by a third to 4.5m ³ / s or 16,000m ³ / h compared to the known cabins at the same lowering speed (0.25m / s). This means that in all known circulation processes, that is to say both with complete fresh air supply and also with mixed air supply, the possibility of reducing the cross-section reduces the heating energy or heating output by a third.

The recording area includes for recording vehicles preferably two elongated sections or planks that are spaced apart from one another transversely to the longitudinal axis of the cabin, that the vehicle with the wheels of the right or left, Page on the first, or second, section can be. Since the two sections are slightly above the cabin floor ramps must be provided, through which the vehicle can be moved to the subareas is. It goes without saying that the displacement device can also include a lifting device so that the vehicle to facilitate work in the lower Vehicle area can be raised.

The displacement device offers another advantage that Possibility of the exhaust air filter and the exhaust air duct above the To attach the cabin floor to the sliding device. For this purpose, an exhaust air box with at least one intake opening with the exhaust air filter and the exhaust air duct so on the Moving device attached that the exhaust air box at least in one direction, in particular across the longitudinal direction of the cabin is displaceable with the receiving area. In a cabin for vehicles, the exhaust box is preferred a bit narrower than the smallest expected Free space formed between the wheels and arranged so that the vehicle is on planks on both sides of the exhaust air box can be pushed. The vehicle is on or with the Planks in the longitudinal direction of the cabin relative to the exhaust air box slidable. If necessary, the exhaust air box but also in the direction of the second guide device slidable with the receiving area or the vehicle.

The suction opening can be designed and arranged as desired be. However, it preferably extends essentially over the entire underside of the exhaust air box. Possibly but there are several at the box boundary, in particular suction openings provided with a closure element educated. This makes it possible to prefer the exhaust air aspirate from a certain area of the room. To get one in Exhaust box displaceable in one direction or its exhaust duct with the fixed air drive device connect, if necessary is a flexible hose connection, but preferably a sealed sliding connection intended. For example, the sliding connection provides that a connection opening of the exhaust air box along a slot-shaped connection opening of the air drive device is displaceable, with about a slide device ensures that the two adjoining Openings only open in their overlap area are.

By placing the exhaust air box directly under the vehicle , it can be guaranteed that the overspray and the Solvents directly in the area in which they are released are suctioned off. Another advantage of this arrangement is that when building the spray booth on a special foundation with one trained in it Free space for the exhaust air duct can be dispensed with. The Spray booth is built directly on a flat floor area.

To with a small fresh air throughput and thus small Heat energy consumption an optimal air quality for one To ensure a person working in the cabin is a targeted entry of fresh air provided. To do this at least two above the supply air or fresh air filter preferably four, possibly also six sub-areas each connected to a fresh air and a recirculation air supply, the inlet openings of the feeds being operable with Closure elements are provided. These are in the Operation switched so that each area with only one Air type is fed. Preferably one half the areas with fresh air and the other half with Recirculated air fed, the fresh air areas chosen so that they are each above the current work area lie. The person working in the work area is located thus in a fresh air area.

The closure elements could possibly be actuated be carried out manually by the working person. Preferably however, a controller is provided that starts out from the position of the recording area or the vehicle or based on the location of the working person, or from the sprayer, the current work area detected and the closure elements actuated accordingly. After switching the locking elements, it takes a period of essentially 15s until the new one A fresh air column from the ceiling to the floor has built up. Therefore, the controller should control the work area only change when the captured work area unchanged for at least a comparable time remains.

The targeted introduction of fresh air can also a small amount of fresh air, namely 50% and possibly even less of the total air introduced, one good air quality can be achieved in the work area. Because only the fresh air needs to be heated, reduced the amount of heat required depends on the proportion of Fresh air volume of the total volume. The air quality is with separate introduction of fresh and recirculated air into the work area much better than when introducing Mixed air.

If, after reducing the cabin cross-section to 2/3 of the usual area, the air throughput is reduced to 2/3 and the fresh air portion can now be reduced to 50% through the targeted fresh air supply, the total fresh air throughput is reduced to 1/3 that of the conventional one Throughput required. This means that instead of a fresh air throughput of 24'000m ³ / h already a fresh air throughput of 8'000m ³ / h ensured in the work area the same air quality. In addition, it has been shown that suctioning under the vehicle ensures a more targeted outflow of the overspray and the released solvents and can also be used with a lower lowering speed, for example at least 0.15m / s. By reducing the lowering speed to 0.19m / s, the fresh air throughput can be reduced to 6'000m ³ / h to a quarter of the throughput of conventional cabins.

The heat output required to warm up the fresh air is possibly both by reducing the throughput as well as reduced by the use of a heat exchanger. A preferred heat exchanger comprises two plate modules, which from the exhaust air horizontally and from the Fresh air is flowed through vertically. Thereby 77% of the heat required by the fresh air from the exhaust air to the Fresh air is given off so that the heater only about 1/4 of the heat required without a heat exchanger must provide. By reducing the fresh air flow to 1/3 or 1/4 and using the heat exchanger it becomes possible to determine the thermal output to be installed to 1/12 or 1/16 of the heat output of known cabins restrict. The effect of one commonly used with burners provided heating power of 300kW can already can be achieved with a heating power of 25kW or 18kW. Because the usual heating power of 300kW for standard cabins is a little oversized, it is in an optimized Cab already possible with a heating power of 10kW - 20kW, a desired one even with cold outside or fresh air To ensure room temperature in the cabin interior.

After the spraying process, drying or Burn-in process, for which the cabin is at temperatures is heated from 60 - 80 ° C. The heating takes place essentially by heating circulating air. The proportion of fresh air is reduced to essentially 10% or less. In order to be able to heat the circulating air and in particular around reducing the fresh air percentage is, if necessary operable channel adjustment flap arranged so that a Part of the exhaust air duct together with part of the fresh air duct forms a further air duct in which the Heater and the fresh air fan arranged are. This also turns the heater into heating the cabin can be used for the burn-in process. The needed Heating output therefore also depends on the desired time, within which the drying or stoving temperature should be achieved. It is expedient to have a heating output of a maximum of 50 kW, in particular a maximum of 30 kW, if appropriate but to install from 10 - 20kW.

This small heat output can be done with an electric heater be provided without special connection cable cross-sections are needed. The well-known Cabins have to power the electric drives Fans, for lighting and electrical Parts of the burner already connecting cables for 40 - 60A what also for feeding the optimally dimensioned electrical Heater is sufficient. Because the total air flow is smaller in a cabin with a smaller cross section the drive motors of the fans are smaller will. So if three instead of three 4kW engines 1.5kW motors are used, they already need them Motors 7.5kW less electrical power, which is scarce Electric heater supply is sufficient.

The measures to reduce fresh air flow and the required heat output enable the operation of a Spray booth without a burner. The fall accordingly Burners eliminate the need for complex structural measures. A Embodiment of the spray booth with one above the booth floor arranged exhaust air box and an electrical Heater can be used as an investment element essentially without construction measures can be built on any flat floor.

In the case of large spray booths, which are used, for example, for spraying trucks or railroad cars, the fresh air throughput can be reduced to an area simply by introducing fresh air in a small part of the entire ceiling without reducing the horizontal booth cross-section and thus without providing a displacement device from only 6,000 to 8,000m ³ / h. The partial area or working area which can be ventilated with this throughput is 9 m ² and, as stated above, corresponds to half the base area of a cabin for passenger cars with a floor area of 18 m ² .

When ventilating or venting large cabins or rooms with machining areas whose extents only a, especially small, share of the total area make it, it is in addition to the preferred, targeted Introducing fresh and circulating air also expediently targeted heavily polluted exhaust air from less polluted room or Extract air separately. That means, analogous to the targeted Fresh air is brought into the current work area and from circulating air to the rest of the area Extracted air in separate channels as exhaust air and Circulated air can be discharged. The exhaust air in the area in which the pollutants are released, and the Extracted air in the remaining area.

The invention thus describes in the most general sense Circulation system for work rooms with minimal fresh air flow, that in at least one horizontal area boundary - in the floor and / or ceiling area - with at least two separate channel or line areas closable connecting openings to the interior. The connection openings preferably open into evenly distributed, possibly in the area of the connection openings separated from each other by separating elements, Spaces and are particularly by filters from Interior separated. In addition, each room area is at least a connection opening assigned to each channel area or can at least be assigned to it. At using the duct areas as supply air ducts, it will possible, the desired supply air, such as Fresh air or recirculated air, or more or less polluted Indoor air. When using the channel areas as exhaust air ducts, the discharged from every room area Air as exhaust air and recirculated air, possibly also as Recirculating air with different levels of pollution, discharged separately will. The circulation in the room can vary Blanket against the floor or vice versa.

In the case of circulation systems that are both spatially separate Allow two types of air to be entered and discharged, it is preferably provided that a work area Fresh air supplied and from this through the work process polluted air is discharged as exhaust air. The remaining space, or the area of the room that is currently not recirculated air can be used as a work area, that as recirculated air from this remaining area was held. With one in this functional Kind of symmetrical supply and exhaust air system can with small Sink or climb speeds in the interior are essentially one laminar flow field can be achieved without unpleasant strong currents with optimal air conditions lowest possible energy expenditure guaranteed. If the duct system constructed essentially the same in the ceiling area is like that in the floor area, so can the control the connection openings, or opening and closing the same, essentially the same.

Even if only in the ceiling or only in the floor area Channel or line areas are formed, it can be advantageous be if this is not for feeding separate Types of air, but used for the separate discharge of air will. When the heavily polluted exhaust air is the largest The proportion of pollutants discharged can be the remaining discharged Indoor air together with fresh air as mixed air extremely small concentrations of pollutants in the whole Space must be entered. The better all pollutants in the area their release separately from that not polluted Indoor air can be captured, the smaller the required Proportion of fresh air.

It is also possible instead of two separate fixed ones Channel and line areas with closable Connection openings, only one as fixed Channel area, but the other as a channel one that can be moved essentially over the entire area Form suction or outlet opening. The means in a spray booth described above with a suction opening arranged in the sliding exhaust air box, could be a permanently installed one in addition to the exhaust air box Suction arrangement can be provided. For example could a flat suction according to the prior art or a linear suction, in particular at least in an edge area between a side wall and the floor. The permanently installed Suction arrangement to extract the little polluted room air and the sliding suction opening in the current one Work area arranged around the heavily loaded area To suck out air. It goes without saying that analog also a sliding opening as a feed opening for Fresh air and permanently installed openings as supply openings can be used for circulating air.

The sliding suction or outlet openings are preferably moved manually to the respective work area. If you with the object to be processed or a Recording area connected to it, they do not have to be separate be moved. However, an actuating device is also possible together with a controller to provide the ensures that the current work area, such as already described, detectable and the opening to this is movable.

A circulation system according to the invention is optimal the most varied of space and working conditions adaptable. It has to be decided whether the targeted Supply of fresh air, the targeted suction of heavily polluted indoor air or both is in the foreground.

According to this decision, for the supply air or for fresh and recirculated air, for extraction or exhaust air and the circulating air, or both for the supply air as well suction each separate channel systems.

Fig. 1:

eine perspektivische Ansicht einer Spritzkabine mit Rollwagen, Abluftkasten und verschliessbaren Lufteintrittsöffnungen;

Fig. 2:

eine schematische Darstellung eines vertikalen Schnittes durch eine Spritzkabine und ihre Luftantriebs-Vorrichtung;

Fig. 3:

ein horizontaler Schnitt durch getrennte Kanäle im Deckenbereich;

Fig. 4:

ein verfahrbares Haltesystem mit Beleuchtungskörpern in einer Ansicht von unten; und

Fig. 5:

eine schematische Darstellung eines vertikalen Schnittes durch eine Spritzkabine mit je zwei getrennten Kanalsystemen im Decken- und im Bodenbereich.

The drawings explain the invention with the aid of schematically illustrated examples. It shows

Fig. 1:

a perspective view of a spray booth with trolleys, exhaust air box and closable air inlet openings;

Fig. 2:

is a schematic representation of a vertical section through a spray booth and its air drive device;

Fig. 3:

a horizontal section through separate channels in the ceiling area;

Fig. 4:

a movable holding system with lighting fixtures in a view from below; and

Fig. 5:

is a schematic representation of a vertical section through a spray booth, each with two separate channel systems in the ceiling and in the floor area.

Fig. 1 shows a spray booth 1, the interior of 1a of a floor 2, a ceiling 3, two long side walls 4, a short side wall or a rear wall 5 and one closable gate opening 6 is surrounded. The gate opening 6 can be closed by gate elements 7 guided in gate guides 8. When the gate elements 7 in the open state the long side walls 4 adjoin, the space requirement is Spray booth around the swivel range of the common door leaves reduced. On the floor 2 are transverse to the longitudinal axis of the cabin extending rails 9 arranged parallel to each other. At least a part of the rails 9 preferably extends from one long side wall 4 to the other. On the rails 9 a trolley 10 is arranged, the Rails 9 assigned, or running parallel to them, first profiles 11 with the first rotatably attached thereto Includes roles. Are transverse to the first profiles 11 second, with the first firmly connected, profiles 12 arranged. At both lateral end areas of the first profiles 11 two parallel profiles 12 are provided in each case and so provided with rotatable second rollers 13, that a plank 14 on each of the second rollers 13 slidable in the cabin longitudinal direction on the trolley 10 can be arranged.

A vehicle to be sprayed is now preferably with the wheels Ramps assigned above the planks, onto which Planks 14 put. The vehicle is in this position with the trolley 10 between the longitudinal axis of the cabin between the two long side walls 4 slidably. By the Moving the planks 14 on the trolley 10 in the The vehicle can move with its Front or its rear to the rear wall 5 or to the gate opening 6 be moved. These possibilities of movement ensure that the width or Length only the sum of an average vehicle width or length and a required working width, the vehicle can be processed all around. Each time the area of the vehicle not to be machined to one Cabin wall or corner slid to adjacent to the to provide the necessary work area.

To overspray and released solvents directly at the Vacuum the vehicle or its area of origin can, is preferably an exhaust box on the trolley 10 15 arranged between the planks 14. The suction opening the exhaust box 15 is preferably something on it formed from the bottom 2 spaced underside. In the exhaust air box 15 the extracted air reaches a connection opening, which slidably to a connection opening 16 connects an air drive device. To the sliding To form the connection essentially tight, sealing elements are arranged around at least one of the openings. To make a connection over the desired displacement length to ensure the connection opening 16 in the direction of displacement on both sides with slide elements 17 provided that the connection opening with the moving away Reduce the connection opening.

The air drive device is behind the rear wall 5, or arranged behind a maintenance door 5a and makes Fresh air and recirculated air separated to lockable connection openings 18 feasible in the ceiling area. Between Connection openings 18 and the cabin interior 1a is a Supply air filter 19 arranged.

Fig. 2 shows schematically that for air circulation important parts of the spray booth 1 and its air drive device 20. The exhaust air box 15 includes an exhaust grate 15a an exhaust air filter 15b and above an exhaust air area 15c, which is connected via the connection opening 15d to the Connection opening 16 of the air drive device 20 connected is. Connects in the air drive device the connection opening 16 a recirculation duct 21 and an exhaust air duct 22 on. There is a circulating air fan in the circulating air duct 21a arranged, the extracted room air as recirculated air through the recirculating air duct 21, an adjoining recirculating air supply duct 21b and connection openings 18 in, distribution spaces preferably separated by partition elements 24 25 moved over the supply air filter 19. The supply air filter 19 preferably rests on a supply air grate 19a.

The exhaust air duct 22 leads twice horizontally through one two-part heat exchanger 26 and the exhaust air is from one Exhaust fan 22a arranged in the exhaust air duct 22 for Exit opening 22c promoted. The fresh air arrives through a suction opening 23c into a fresh air duct 23, through the heat exchanger 26 and through a heating area with a heater 27 to a fresh air supply duct 23b leads. From the fresh air supply duct 23b reaches that driven by the fresh air fan 23a Fresh air through connection openings 18 into distribution spaces 25 and through the supply air filter 19 into the cabin interior 1a.

A cooling device for cooling the fresh air preferably comprises at least one water supply and at least a nozzle device 26a for generating a water mist. The water mist is preferably carried out with the exhaust air through the Heat exchanger 26 out and removes the fresh air by evaporating heat. The fans 21a, 22a, 23a are driven by motors 21a ', 22a', 23a '. To prevent, that solvent vapors from sparks of electrical Engines can be ignited, the engines are all in the Fresh air duct 23 arranged.

To target the fresh air and the recirculated air in the desired To be able to enter areas of the interior 1a connecting openings 18 from each feed channel 21b, 23b in at least two, preferably four, optionally also six or eight ceiling sections, each of essentially the same size. In addition, the connection openings are each with an actuatable closure element 18a. Possibly enables manual actuation Switching from fresh air to recirculated air supply and vice versa in each section of the ceiling. Preferably but a controller for controlling actuators 18b provided for the closure elements 18a. The Control is preferably with a detection device connected to capture the current work area, wherein the detection device, if necessary, the location of the Planks, but preferably the position of a worker Makes person or their injection mold detectable.

To be able to dry a sprayed vehicle is preferred an actuatable flap 28 in the air drive device provided to provide another Recirculation duct part of the exhaust duct 22 with a Part of the fresh air duct 23, in which the heater 27 is arranged, makes connectable. Depends on the Location of the flap 28 can be ensured that with the Exhaust air also contains a small proportion of fresh air Heater 27 enters the interior and accordingly some exhaust air is discharged.

To control the motors 21a ', 22a', 23a ', the flap 28 and the actuator 18b is a control device 29 provided.

Fig. 3 shows a labyrinthine design of the two separate Feed channels 21b and 23b that are in a horizontal Cavity through the arrangement of a labyrinth partition 30 allows the separate channels 21b, 23b with to train next to each other with little effort.

4 shows a holding system 31, which is in rails 33 movable carriage part 32 and one to a vertical in rotation axis arranged essentially centrally on the slide part 34, rotatable rotating part 35 comprises. On the rotating part 35 are lighting fixtures 36 and a fastening area 37 are arranged. The fastening area 37 is used for fastening, for example an infrared heater or possibly a suction or air intake element. The rails 33 lead near the ceiling along the long side walls 4, so that the lighting fixtures 36 arranged on the rotating part 35 and heating or air routing elements for the possible work areas are movable.

Fig. 5 shows a spray booth 1, in the interior 1a an air flow from the floor against the ceiling is stimulated becomes. To both the ceiling area from the interior 1a emerging air spatially separated as exhaust air and as To be able to extract air as well as the air to be introduced spatially separated in the floor area as fresh air and recirculated air are to be introduced, two each in the floor and pool area separate channel areas 21b, 23b and 21b ', 23b' with closable Connection openings 18 to the interior 1a formed. The connection openings 18 open into substantially evenly distributed areas, with each one Space area each connecting openings 18 of each channel area 21b, 23b and 21b ', 23b' are arranged and thus every room area with each channel area 21b, 23b or 21b ', 23b' can be connected.

The air drive device 20 essentially corresponds of the device 20 shown in FIG. 2, whereby now are swapped above and below to reverse the interior 1a To achieve air flow. The channel areas 21b ', 23b 'in the ceiling area are on the suction side with the exhaust air or the air duct 22 and 21 connected and the duct areas 21b, 23b in the bottom area are connected on the pressure side to the fresh air or recirculated air duct 23 or 21. The schematic Illustration shows a left and a right Room area. The closure elements 18a are in the left Positioned so that fresh air enters and the extracted air is discharged as exhaust air. In the right area the closure elements 18a are positioned such that Recirculated air enters and the extracted air as recirculated air is fed.

It goes without saying that the elements described Embodiments also in other combinations can be used.

Claims (9)

Spray booth for all-round processing of objects, in particular vehicles, with an interior (1a) surrounded by side walls (4, 5), at least one closable gate opening (6), a ceiling (3) and a floor surface (2) and with an air drive device ( 20), the air can be introduced into the interior (1a) and the air can be discharged from the interior (1a), the air introduced being able to be conditioned in such a way that its temperature is in a desired temperature range and the pollution tolerance values for the air in the interior (1a) working person can be guaranteed, characterized in that a displacement device (10) is provided with a movable receiving area for receiving an object, in particular a vehicle, the receiving area being movable in the spray booth (1) at least in one direction of displacement, and the required cabin width or length in the direction of displacement essentially the sum of ei ner required working width and the width or length that corresponds to the objects or vehicles to be processed. Spray booth according to claim 1, characterized in that the displacement device (10) comprises a first and a second guide device (9, 11; 12-14), the displacement directions of which are essentially orthogonal to one another, so that the receiving area is essentially arbitrary within the booth ( 1) is displaceable, the receiving area for receiving vehicles preferably comprising two planks (14) which are spaced laterally from one another in accordance with the possible track widths and preferably the first guide device (9, 11) has at least two parallel, in particular transverse to the longitudinal axis of the cabin, Rails (9) and a trolley (10) movable on the rails and in particular the second guide device (12-14) comprises at least one, but preferably two, pairs of rails (12) attached to the trolley (10) and the planks (12) assigned to each of the rails (12) 14), whereby to enable the displacement movement between hen the pairs of rails (12) and the planks (14) rollers (13) are provided which are rotatably mounted on the pairs of rails (12) or on the planks (14). Spray booth according to claim 1 or 2, characterized in that an exhaust system, preferably an exhaust air box (15) with at least one intake opening (15a), in particular an exhaust air filter (15b) and an exhaust air area (above the cabin floor (2) on the displacement device (10). 15c) which is displaceable at least in one direction, preferably transversely to the longitudinal direction of the cabin with the receiving area, and optionally one of the following features is provided a) the exhaust air box (15) is arranged between two planks (14) which serve as a receiving area, the planks (14) preferably being movable relative to the exhaust air box (15), but possibly also connected thereto; b) the suction opening (15a) extends essentially over the entire underside of the exhaust air box (15), but optionally several suction openings are provided on the box edge, in particular provided with a closure element; and c) the exhaust air box (15), or its exhaust air area (15c), which can be displaced in at least one direction, is connected to the stationary air drive device (20), if necessary via a flexible hose connection, but preferably via a sealed sliding connection, in particular a connection opening (15d) of the exhaust air area (15c) can be moved along a slot-shaped connecting opening (16) of the air drive device (20) and a slide device (17) ensures that the two adjoining openings (15d, 16) are only open in their overlap area. Spray booth according to one of claims 1 to 3, characterized in that at least one fresh air and at least one recirculation air supply duct (23b, 21b) is formed above the cabin ceiling (3) or above a supply air filter (19), and in at least two, preferably four, possibly also six or eight, each of the substantially equal-sized ceiling partial areas of each feed channel (23b, 21b) comprises at least one connection opening (18) to the cabin interior (1a), the connection openings (18) being provided with an actuatable closure element (18a) and optionally one of the following features is provided a) a manual actuating device allows switching from fresh air to recirculated air supply and vice versa in each part of the ceiling; and b) a controller (29) for controlling an actuating device (18b) for the closure elements (18a) is connected to a detection device for detecting the current working area, the detection device possibly the position of the receiving area, but preferably the position of a working person or their injection mold makes it detectable. Spray booth according to one of claims 1 to 4, characterized in that the air drive device (20) comprises a duct system (21, 22, 23) and at least three of motors (21a ', 22a', 23a, preferably arranged in fresh air duct areas) ') comprises drivable fans (21a, 22a, 23a), wherein a) the exhaust air fan (22a) makes an exhaust air portion of at least one suction opening (15a, 18) leading into the interior (1a) movable through an exhaust air duct (22) to an outlet opening (22c); b) the fresh air fan (23a) makes fresh air movable through a fresh air duct (23) to at least one fresh air supply duct (23b); and c) the recirculating air fan (21a) makes a room air component movable from at least one suction opening (15a, 18) leading into the interior (1a) through a recirculating air duct (21) to at least one recirculating air supply duct (21b). Spray booth according to claim 5, characterized in that at least one of the following features is provided, a) in the air drive device (20), a heat exchanger (26), in particular a plate heat exchanger, is arranged in the exhaust air and in the fresh air duct (22, 23) such that the fresh air is preheated by the exhaust air; b) in the air drive device (20) there is a cooling device for cooling the fresh air, which preferably comprises at least one water supply and at least one nozzle device (26a) for generating a water mist, the water mist preferably with the exhaust air through the heat exchanger (26) is feasible and thereby removes heat by evaporating the fresh air; and c) in the fresh air duct (23) of the air drive device (20) there is an electrical heating device (27), preferably with an electrical output of less than 50 kW, in particular less than 30 kW, optionally of 10-20 kW, and optionally an actuatable one Duct adjustment flap (28) arranged in such a way that part of the exhaust air duct (22) together with part of the fresh air duct (23) forms a further recirculating air duct in which the heating device (27) and the fresh air fan (23a) are arranged that the heating device (27) can also be used to heat the cabin for the baking process. Circulation system for a work area, in particular for a spray booth (1), with an air drive device (20), the conditioned fresh air can be introduced into the interior (1a) via a fresh air duct (23) and air from the interior (1a) via an exhaust air duct ( 22) as exhaust air and via an air duct (21) as air that can be re-entered into the interior (1a), characterized in that in at least one horizontal space delimitation area, at least two are connected to ducts (21-23) of the air drive device (20) separate channel areas (21b, 23b; 21b ', 23b') are formed with closable connection openings (18) to the interior (1a), which open into essentially uniformly distributed room areas, with connection openings (18) of each channel area (21b, 23b; 21b ', 23b') are arranged and thus each room area can be connected to each channel area (21b, 23b; 21b ', 23b') in order to achieve targeted air movement To allow between the air drive device (20) and desired areas. Circulation system according to claim 7, characterized in that at least one of the following features is provided, a) between the connection openings (18) and the interior (1a) filters (19) are arranged; b) the connecting openings (18) of different spatial areas are separated from one another by partitions (24); c) two separate duct areas are formed in the ceiling area and connected on the pressure side to the fresh air duct or the recirculated air duct; d) two separate duct regions are formed in the base region and are connected on the suction side to the exhaust air duct and the recirculating air duct; e) two separate duct regions (23b ', 21b') are formed in the ceiling region and are connected on the suction side to the exhaust air duct and the recirculating air duct (22, 21); and f) two separate duct regions (23b, 21b) are formed in the base region and are connected on the pressure side to the fresh air duct or the recirculated air duct (23, 21). Circulation system according to claim 7 or 8, characterized in that in the area of a horizontal space boundary surface at least one first connection channel (15c) connected to a channel of the air drive device (20) is formed with at least one connection opening (15a) to the interior (1a), which Opening is slidable along the space delimitation surface and preferably in the area of the same space delimitation surface a second connection channel is provided, which is connected to a channel of the air drive device (20) and is separated from the first connection channel (15c) and which is connected via at least one fixed areal or possibly along one Line extending opening is connected to the interior (1a).

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