EP2026910B1 - Painting system - Google Patents

Description

For high-quality results in spray painting spray booths of paint shops are usually air-conditioned. Air conditioning requires cooling to eliminate atmospheric moisture and then heating to operating temperature again. As a result of the large air flow rates that are necessary, this results in a significant energy consumption.

The object of the invention is to provide a paint shop for painting parts, whereby the energy consumption can be reduced.

From the GB 1 474 732 A a paint shop according to the preamble of claim 1 is known, which has an application area and two auxiliary areas with separate air supply. Supply air is drawn in from the environment, which is introduced into the application area via an air supply system, which may contain air conditioning, and into the two auxiliary areas with separate air ducts. The exhaust air from the spray booth releases its energy through a heat exchanger partially to the fresh air sucked in and is then released to the environment.

This system also requires considerable amounts of energy for the air conditioning of the supply air for the application area and the auxiliary areas.

From the FR 2 525 926 A1 Another painting plant is known in which the supply air is supplied via separate channels in the application area and in the auxiliary areas. As incoming air fresh air is used, which is supplied via a fan.

The exhaust air from the spray booth is partially recycled and partially supplied to the application area after passing through an air conditioning device.

Although here the exhaust air from the spray booth is partially used again, so that the energy consumption is slightly reduced, such a spray booth does not meet the requirements placed on high-quality spray paints, since the supply air supplied mainly consists of ambient air, which is supplied via a blower ,

Against this background, the object of the invention is to provide a paint shop for painting parts, whereby a high-quality paint can be guaranteed and at the same time the energy consumption compared to conventional paint shops can be reduced.

This object is achieved by a paint shop according to claim 1.

Since according to the invention only the application area of the spray booth, in which the actual spray painting takes place, is supplied with conditioned supply air, the remaining auxiliary areas of the spray booth, in which optionally additional units, such as painting robots, lifting devices and the like, are arranged, can be supplied with supply air, which not air conditioned. In this way, the volume of air to be conditioned is considerably reduced compared to the conventional full air conditioning in the prior art, which is associated with a corresponding energy saving.

In the context of this invention, "air conditioning" is understood to mean an air treatment which always comprises cooling and associated dehumidification. A simple "air conditioning" such as by heating or mixing with other air is not included.

Air conditioning is considered necessary to be able to actually achieve good painting results.

In accordance with a further embodiment of the invention, at least one guide element is provided between the application region and the at least one auxiliary region for optimizing the flow of air in the transition region between the application region and the auxiliary region.

In this way, turbulences, which are inevitably caused by different airtightness, moisture contents or temperatures of the adjoining merged air flows, can be reduced.

According to a further embodiment of the invention, exhaust air from the spray booth is at least partially performed in recirculation mode via at least one separator, and at least a portion of the circulating air of an exhaust air purification device, such as a thermal afterburning, preferably a regenerative afterburning, or solvent recovery fed.

In this way, the use of solvent-based lacquers facilitates concentration of the solvents to a range of up to about 10 g / m ³ (typically about 3 g / m ³ ) and suitable exhaust air purification by thermal afterburning.

According to a further embodiment of the invention, the second air intake at least partially sucks recycled air from the spray booth.

In this way, the advantages associated with concentration can be used for the application area.

In an alternative embodiment of the invention, the second air supply can also be supplied at least partially with ambient air or fresh air.

Also in this case, the energy saving achieved according to the invention is achieved.

According to a further embodiment of the invention, a partition with an application opening for spray application is provided between the application area and the auxiliary area.

This measure has the advantage that an operator for a manual spray painting can stand in the auxiliary area and can be supplied with separate supply air, which is preferably fresh air. Through the application opening, the spray application can be carried out in a suitable manner.

In this case, a pressure gradient preferably arises between the auxiliary region and the application region, so that an air flow results from the auxiliary region to the application region.

In this way, the operator standing in the auxiliary area is protected against increased pollutant concentration of the circulating air flow in the application area.

According to a further alternative of the invention, the spray booth has a separate, preferably movably arranged work cabin which is connected to the application area via an application opening.

This embodiment is particularly advantageous in the painting of large parts. The movement of the work cabin can e.g. in the vertical direction and / or in the horizontal direction or as a rotation.

The partition between the application area and the auxiliary area is designed to be movable in accordance with a further embodiment of the invention.

Also, the application opening can be changeable or movable.

In this way, there is a great deal of flexibility.

As already mentioned, the second air supply for the auxiliary area can be at least partially supplied with fresh air.

This is particularly advantageous when the auxiliary area is provided for access by a worker.

In an additional development of the invention, air filters with different qualities are provided for the air conditioning unit and for the air supply for the auxiliary area, preferably finer qualities for the air conditioning unit and coarser qualities for the second air supply for the auxiliary area.

For example, the qualities F5 and F9 could be used in the air-conditioning unit, while only F5 could be used for the auxiliary area.

In this way, the pressure loss caused by the filters in the auxiliary area is reduced, which leads to energy savings and saves filter costs.

According to a further embodiment of the invention, a monitoring device for monitoring the solvent concentration is provided.

In this way, it is possible to further reduce the amount of air for the exhaust air purification device to a level that is necessary to ensure compliance with a maximum solvent concentration.

According to a further embodiment of the invention, a control device for controlling the proportion of air, which is supplied to the exhaust air purification device, is provided.

The proportion of air which is fed to the exhaust air purification device is hereby preferably controlled as a function of the solvent concentration in the region of the second air supply.

In this way, the exhaust air supplied to the exhaust air purifier (e.g., regenerative afterburning) is reduced to the necessary level. In this way, there is a further energy and cost savings.

Furthermore, it is possible in this case to control the solvent concentration in the air supplied to the exhaust air purification device such that the solvent concentration is between 2 and 20 g / m ³ , preferably between 2 and 10 g / m ³ , particularly preferably between 2 and 5 g / m ³ is held.

In this way, a regenerative afterburning for exhaust air purification can be used, which is operated in the autothermal range, i. that only the solvents contained in the exhaust air are sufficient to maintain the combustion. This makes a particularly energy-saving process possible.

At a sufficiently high solvent concentration of, for example, 10 g / m ³ , instead of afterburning, the exhaust air can also be passed over a "cold trap" and the solvent fraction can be separated off by condensation.

This is particularly inexpensive and has the advantage that the condensate is reusable.

According to a further embodiment of the invention, the monitoring device is designed to measure the solvent concentration, and the control device has a valve which is controlled as a function of the solvent concentration. This may be, for example, a controllable flap or a controllable fan.

In this way, the control of the exhaust air purification device supplied exhaust air can be ensured in a simple and accurate manner.

According to an alternative embodiment of the invention, the monitoring device is designed for monitoring the amount of solvent introduced and the control device for controlling the portion of the circulating air, which is supplied to the exhaust air purification device, depending on the introduced amount of solvent.

For monitoring the amount of solvent, for example, the amount of liquid sprayed in the spray booths can be used.

In this way, can be dispensed with a solvent sensor, resulting in a particularly simple and inexpensive design.

According to a further embodiment of the invention, the spray booth is sealed off to the outside by doors or inlet and outlet locks.

By such a measure, the exhaust air amount can be further reduced. For long parts, double doors can be installed before and after the spray booth.

The double doors are preferably each coupled with a lock such that only one outer or one inner door can be opened.

According to a further embodiment of the invention, a spray booth according to the invention has a spray booth with a Applikatiönsbereich for painting parts, an air supply and an air extraction, with a conveyor for conveying parts through the spray booth, as well as an inlet lock and an outlet lock, the locks as with connected to the interior of the spray booth channels are formed, which run obliquely upward to the outside.

Such an embodiment of the invention also leads to energy savings when the spray booth is not equipped with separate air ducts for an application area and an auxiliary area.

In conventional flow spray booths, the conveyor usually runs horizontally. At the inlet end and at the outlet end, no special measures have been taken to achieve air separation between the conditioned cabin air and the non-conditioned outside air. This leads to significant energy losses at the inlet and outlet ends. There is also the risk of solvent losses and the risks of dirt contamination.

According to the invention, the amount of air entering this way is significantly reduced by the special design of the locks at the inlet and outlet ends, so that the total air turnover is reduced, which is associated with corresponding savings in energy and costs.

This exploits the fact that the conditioned air inside the spray booth is usually cooler and thus heavier than the ambient air. This significantly reduces the amount of air entering or leaving the locks.

It is also possible to arrange a plurality of spray booths in succession, which are coupled via a channel through which the conveyor extends. An inlet lock is then provided on the inlet side of the first spray booth and an outlet lock on the outlet side of the last spray booth.

According to a further embodiment of the invention, the locks are closed to the outside in each case by a lower edge, and wherein the lower edge are arranged at a level which is at least at the level of the conveyor on which the conveyor extends within the spray booth.

This results in a particularly effective reduction of the air exchange at the locks.

According to a further embodiment of the invention, air-conditioning devices or ventilation devices are provided with filters, which can be flowed through in the vertical direction.

This can be compared to the usual in the art filter installation in the horizontal direction save considerable costs, since the filters can be used from above, without special reinforcements as in horizontal filter installation are necessary.

It is understood that the features of the invention mentioned above and those yet to be explained below can be used not only in the particular combination indicated, but also in other combinations or in isolation, without departing from the scope of the invention.

Figur 1

eine erste Ausführung einer erfindungsgemäßen Lackieranlage in schematischer Darstellung;

Figur 2

eine Abwandlung der Lackieranlage gemäß Figur 1;

Figur 3

eine weitere Ausgestaltung einer erfindungsgemäßen Lackieranlage;

Figur 4

eine Aufsicht auf eine erfindungsgemäße Spritzkabine von oben in stark vereinfachter schematischer Darstellung;

Figur 5

eine weitere Ausführung einer erfindungsgemäßen Spritzkabine in quergeschnittener Darstellung;

Figur 6

eine weitere Abwandlung der Lackieranlage gemäß Figur 3;

Figur 7

eine weiter Abwandlung der Lackieranlage gemäß Figur 1;

Figur 8

einen Teilschnitt durch die Spritzkabine mit Durchlaufförderer gemäß Figur 1 im Bereich einer Einlaufschleuse;

Figur 9

eine weitere Ausführungsform einer Lackieranlage mit zwei hintereinander angeordneten Spritzkabinen, die mit eine Einlauf- und einer Auslaufschleuse versehen sind;

Figur 10

eine weitere Abwandlung einer erfindungsgemäßen Lackierkabine mit zwei Schleusen, die über Doppeltüren gesichert sind;

Figur 11

eine vereinfachte Darstellung eines Filters für eine Klimatisierungseinrichtung oder Lüftungseinrichtung gemäß Fig. 1, das als vertikal durchströmbares Flächenfilter ausgebildet ist und

Figur 12

eine vereinfachte Darstellung eines Filters für eine Klimatisierungseinrichtung oder Lüftungseinrichtung gemäß Fig. 1, das als vertikal durchströmbares Taschenfilter ausgebildet ist.

Further features and advantages of the invention will become apparent from the following description of preferred embodiments with reference to the drawings. Show it:

FIG. 1

a first embodiment of a paint shop according to the invention in a schematic representation;

FIG. 2

a modification of the painting according to FIG. 1 ;

FIG. 3

a further embodiment of a paint shop according to the invention;

FIG. 4

a top view of a spray booth according to the invention from above in a highly simplified schematic representation;

FIG. 5

a further embodiment of a spray booth according to the invention in a cross-sectional representation;

FIG. 6

a further modification of the paint shop according to FIG. 3 ;

FIG. 7

a further modification of the paint shop according to FIG. 1 ;

FIG. 8

a partial section through the spray booth with continuous conveyor according to FIG. 1 in the area of an inlet lock;

FIG. 9

a further embodiment of a paint shop with two successively arranged spray booths, which are provided with an inlet and an outlet lock;

FIG. 10

a further modification of a paint booth according to the invention with two locks, which are secured by double doors;

FIG. 11

a simplified representation of a filter for an air conditioning device or ventilation device according to Fig. 1 , which is designed as a vertically flow-through surface filter and

FIG. 12

a simplified representation of a filter for an air conditioning device or ventilation device according to Fig. 1 , which is designed as a vertically flow-through pocket filter.

A first embodiment of a paint shop according to the invention is in FIG. 1 total designated by the numeral 10.

The painting installation has a spray booth 12, which is divided into three areas, a centrally arranged application area 14, in which parts 30 are spray-painted and in two lateral auxiliary areas 16, 18, in which auxiliary equipment for painting, such as robots, hoists or the like, are provided.

The transition between the application area 14 and the auxiliary areas 16, 18 is exemplary FIG. 4 to see closer. Thus, there is a corridor 52 which extends longitudinally through the spray booth 12 and can be moved through the parts 30 along a path predetermined by a conveyor, as indicated by the arrow 54. Within the spray booth 12, two robots 60, 62 are arranged, of which one 60 in the auxiliary area 18 and a second 62 in the auxiliary area 16. In FIG. 4 are a first application surface 56 within the corridor 52, which is operated by the robot 62, and a second application surface 58, which is operated by the robot 62, shown in dashed lines. These application surfaces 56, 58 are located within an application area 14 and are supplied with conditioned air from above via a separate air supply 20, which is guided via an air-conditioning device 36 (cf. FIG. 1 ). The remaining auxiliary areas 16, 18, in which the robots 62, 64 and possibly other auxiliary units are accommodated, are supplied via a separate air supply 22 and 24 with separate supply air, which according to FIG. 1 is supplied via a recirculation device 38.

Due to this separate supply of the application area 14 and the auxiliary areas 16, 18 with supply air, the energy-intensive air conditioning in the application area 14 can be limited to the actual necessary air volume, while the remaining areas of the spray booth, which are designated as auxiliary areas 16, 18, with separate supply air be supplied, which is not air-conditioned or only partially air-conditioned. In FIG. 1 For this example, a recirculation device 38 is shown.

The recirculation device 38, via which the air supply 22, 24 of the auxiliary areas 16, 18 is supplied with supply air, generally has a fan, a filter and possibly an additional heater.

The separately supplied into the spray booth 12 at 20, 22 and 24 supply air exits from above into the interior of the spray booth 12, which takes place via blowing surfaces, which in FIG. 1 are indicated schematically with 25. As known in the art, these blowing surfaces can be configured for example as filter ceilings, but also as a grid, nozzles, perforated plates or the like. Here, suitable materials for a uniform air distribution are used.

Adjacent to the blowing surfaces 25 in the transition regions between the application area 14 and the auxiliary areas 16, 18 arranged guide surfaces 26, 28 which in FIG. 1 are shown as movable flaps. By means of a suitable adjustment of the guide surfaces 26, 28, turbulences that result as a result of the different air quality between the application region 14 and the auxiliary regions 16, 18 can be minimized. Preferably, the supply air supplied to the application area 14 and the auxiliary areas 16, 18 from the air conditioning unit or from the air conditioning unit is controlled in such a way that the same or similar air speeds result. In addition, the same possible temperatures and low air density differences are sought, so as to achieve the result as possible a rectified, laminar flow through the spray booth from top to bottom. In this way, high quality finishes can be achieved.

The exhaust air of the spray booth 12 is recycled and for this purpose via a scrubber 32 (eg venturi scrubber) and a post-scrubber 34 out. From the post-scrubber 34, the exhaust air passes to the air conditioning device 36, in which it is adjusted to the desired temperature and relative humidity. Another part of the exhaust air passes to the recirculation device 38, from which the air supply 22, 24 for the auxiliary areas 16, 18 is fed. A portion of the exhaust air is branched off after the recirculation device 38 and an exhaust air purification system 40, preferably supplied in the form of a thermal afterburning, to then be discharged as practically pollutant-free exhaust air to the environment.

The air conditioning device 36 used is basically known in the prior art. It usually has a pre-filter, a drain cooler, a heater and a blower. Further, suitable control is provided to adjust the air supplied to the spray booth to an appropriate temperature (e.g., 24 ° C) and a suitable relative humidity (e.g., 65%).

Instead of the aforementioned conventional Venturi deposition air conditioning, dry separation air conditioning may also be used.

One opposite to the embodiment according to FIG. 1 slightly modified version of a ( FIG. 2 shows a non-inventive embodiment) paint shop is in FIG. 2 represented and designated overall by the numeral 10a. In this figure, as well as in the following figures, corresponding reference numerals are used for corresponding parts.

The paint shop 10a has a spray booth 12a, which is opposite to the previously with reference to FIG. 1 spray booth explained 12 only differs in that the guide surfaces 26a, 28a between the application area 14 and auxiliary areas 16, 18 are rigid.

Further, the spray booth 12a is not operated with circulating air as in the aforementioned embodiment, but is supplied with ambient air via the air conditioner 36 and an air feeder 42, respectively.

A further modification of a paint shop according to the invention is in FIG. 3 represented and designated overall by the numeral 10b.

In this case, the spray booth 12b has an application area 14 and an auxiliary area 16, which are separated from one another by a partition wall 44, wherein an application opening 46 is formed in the partition wall 44. An operator 51 standing in the auxiliary area 16 can spray-paint parts 30, which are located in the application area 14, by means of a spray gun 49.

The air supply 24 for the application area 14 is in turn via an air conditioning device 36. In contrast, the air supply 20 is fed to the auxiliary area 16 with fresh air via a supply air 42. In this case, a pressure gradient between the auxiliary area 16 and the application area 14 is preferably set, so that the operator 51 is protected from pollutant-laden ambient air of the application area 14 by an air flow into the application area 14. Behind the air conditioning device 36, a thermal post-combustion 40 is preferably additionally connected to clean solvent-laden circulating air and then to be able to deliver to the environment. The supply air flow for the auxiliary area 16, which is supplied via the supply air 42, may be such that it corresponds to the exhaust air flow discharged via the thermal afterburning. For example, the thermal afterburning 40 may be designed for 5000 m ³ / h and the same amount supplied via the air supply device 42 in the auxiliary area 16. In the auxiliary region 16, a dry separation 48 may be provided below, which allows a discharge of the exhaust air via a blower 50 to the environment.

However, an exhaust air for the auxiliary area 16 can also be completely dispensed with, provided that the supplied supply air is conducted completely via the application opening 46 into the application area 14.

The auxiliary area 16 can also be designed as a ventilated hall in which the operator 51 stands and which is in communication with the application area 14 via the application opening 46.

In FIG. 5 is an easy compared to the design according to FIG. 4 modified embodiment of a spray booth shown and designated overall by 12c.

In this case, a robot 64 is shown in the auxiliary area 18 in order to use it to paint parts 30, which are conveyed through the application area 14 by means of a conveyor 68.

A modification of the previously based on FIG. 3 explained painting plant is in FIG. 6 represented and designated overall by the numeral 10d.

The only difference to the execution according to FIG. 3 is that the spray booth 12d includes a movable workbench 70 in which an auxiliary area 16 is provided for an operator. The movable work cabin 70 has the application opening 46 and is above it with the application area 14 in connection. The work cabin 70 has no own exhaust air. The work cabin 70 can be moved approximately in the vertical direction and / or in the horizontal direction, with the application opening 46 being coupled to the application area 14 via suitable closing devices and seals.

In FIG. 7 is another over the execution according to FIG. 1 modified version of a painting according to the invention shown and designated 10e in total.

The paint shop 10e has a spray booth 12 with an application area 14 and two auxiliary areas 16, 18 according to FIG FIG. 1 on. The application area is as in FIG. 1 supplied via an air supply 20 from an air conditioning device 36, while the auxiliary areas 16, 18 are supplied via a separate air supply 22, 24 from a recirculation device 38. Both the air conditioning device 36 and the recirculation device 38 are partially fed in the circuit of the exhaust air of the spray booth 12, which is cleaned via a washing device 32 and a post-washer 34. Unlike the version according to FIG. 1 the solvent concentration of the air supplied by the recirculation device 38 via the air supply 22, 24 into the auxiliary areas 16, 18 is monitored and the proportion of air diverted to the thermal afterburning 40 is controlled as a function of the solvent concentration via an automatically controllable valve 82. Otherwise the execution corresponds FIG. 1 ,

In FIG. 8 is the spray booth according to FIG. 1 shown enlarged in a partial longitudinal section in the region of the inlet side. In this case, the cutting line runs directly through the application area 14. The spray booth designed as a pass-through cabin has an inlet lock 92 and an outlet lock (not shown) of identical construction. The inlet lock 92 and the outlet lock are formed as channels, which open obliquely from above into the interior of the spray booth 12. A conveyor 90 runs parallel along the upper inner side of the inlet lock 92, ie obliquely from above into the spray booth 12. Within the spray booth 12, the conveyor 90 runs horizontally immediately below the blowing surfaces 25. At the outlet side of the conveyor 90 runs again parallel along the upper inside of the outlet lock slanted upward.

The lower edge 94 of the inlet lock 92 (and correspondingly also the outlet lock) is at the highest possible level, preferably at least at the level of the conveyor 90 within the spray booth 12.

Due to the high-level inlet and outlet locks, the cooler and consequently heavier air within the locks 92 or the spray booth 12 "remains" as a result of the air conditioning, so that an ingress of air from warmer air is significantly reduced from the outside. Thus, the air exchange at the openings of the sluices 92 is significantly reduced, whereby the required air flow rate is significantly reduced. Of course, this applies regardless of whether the spray booth 12 as described here has a separately supplied application area 14 and auxiliary areas 16, 18 or whether the spray booth 12 is conditioned altogether.

In FIG. 9 is a modification of the embodiment according to FIG. 8 shown. Here, two spray booths 12, 12e are arranged one behind the other and coupled together by a channel 97, through which a conveyor extends. At the inlet end of the first spray booth 12 is an inlet lock 92 according to FIG. 8 provided, while at the outlet end of the second spray booth 12 e an outlet lock 96 according to FIG. 8 is provided.

In FIG. 10 a spray booth 12f is shown communicating with a first lock 98 on a first side and a second lock 102 on the opposite side. At the spray booth 12f and at the lock 98 and 102 respectively doors 99, 100 and 103, 104 are provided, which are controlled so that only ever an outer door 100, 104 or an inner door 99, 103 can be opened. This minimizes the air exchange.

In FIG. 11 is a section of a surface filter for the air conditioning device 36 or the air circulation device 38 according to FIG. 1 shown in simplified form. It is a surface filter with a filter material 106, which also rests on a support surface 107 and can be flowed through in the vertical direction.

As a result of the vertical arrangement fewer reinforcing measures are required than in the usual horizontal arrangement in the prior art. Also paint residues can drain or drip better down.

FIG. 12 shows an embodiment of such a filter 105a in the form of a pocket filter or bag filter 106 which is held on a receptacle 107 and is also held in a receptacle 107.

Claims (24)

1. A painting installation comprising a spraying cabin (12; 12a; 12b; 12c; 12d) having an application region (14) for painting of parts (30), comprising at least one auxiliary region (16, 18) separated from the application region (14), comprising an air feed and an air suction, wherein for the application region (14) a first air feed (20) is provided being guided via an air conditioning device (36), and wherein for the auxiliary region (16, 18) a second air feed (22, 24) separated from the air conditioning device (36) is provided, characterized in that the outgoing air from the spraying cabin (12; 12a; 12b; 12c; 12d) is fed to a washer (32) which is followed by a rewasher (34) for recycling, the latter being at least partially connected with the air conditioning device (36), and in that the first air feed (20) for the application region (14) is only connected with the air conditioning device (36) for feeding air conditioned additional air, while the second air feed (22, 24) for the auxiliary region (16, 18) for feeding air not being air conditioned or partially air conditioned is connected with a device (38) not being fed from the air conditioning device (36).
2. The painting installation according to claim 1, characterized in that between the application region (14) and the at least one auxiliary region (16, 18) there is provided at least one guiding element (26, 28; 26a, 28a) for fluidically optimizing air flows in the transition region between the application region (14) and the auxiliary region (16, 18).
3. The painting installation according to claim 2, characterized in that the at least one guiding element (26, 28) is adjustable, preferably being configured as a movable flap.
4. The painting installation according to any of the preceding claims, characterized in that the outgoing air from the spraying cabin (12; 12b; 12c; 12d) is at least partially guided through a separating device (32, 34) within re-circulation operation, and wherein at least a part of the re-circulating air is fed to an outgoing air cleaning device (40), preferably being configured as a thermal burner, preferably as a regenerative after burner, or as a solvent recovering device.
5. The painting installation according to any of the preceding claims, characterized in that to the second air feed (22, 24) there is fed at least partially recycled air from the spraying cabin (12; 12a; 12b; 12c; 12d).
6. The painting installation according to any of the preceding claims, characterized in that to the second air feed (22, 24) there is fed at least partially surrounding air.
7. The painting installation according to any of the preceding claims, characterized in that between the application region (14) and the auxiliary region (16, 18) there is provided a dividing wall (44) comprising an application opening (46) for spraying application.
8. The painting installation according to any of claims 1 to 6, wherein the spraying cabin (12d) comprises a divided working cabin (70), preferably being arranged movably, that is connected with the application region (14) via an application opening (46).
9. The painting installation according to claim 7 or 8, characterized in that the dividing wall (44) is movable.
10. The painting installation according to claim 7, 8 or 9, characterized in that the application opening (46) is variable or movable.
11. The painting installation according to any of the preceding claims, characterized in that the second air feed (22, 24) for the auxiliary region (16, 18) is at least partially fed with fresh air.
12. The painting installation according to any of claims 7 to 11, characterized in that between the application region (14) and the auxiliary region (16, 18) a pressure difference exists, so that an air current from the auxiliary region (16, 18) to the application region (14) results.
13. The painting installation according to any of the preceding claims, characterized in that for the air conditioning device (36) and for the air feed for the auxiliary region (16, 18) different air filters having different qualities are used, preferably finer qualities for the air conditioning device (36) and coarser qualities for the second air feed (22, 24) for the auxiliary region.
14. The painting installation according to any of claims 4 to 13, comprising a monitoring device for monitoring the solvent agent concentration in the region of the second air feed (22, 24) for the auxiliary region.
15. The painting installation according to any of the preceding claims, comprising a control device for controlling the air proportion which is fed to the outgoing air cleaning device (40).
16. The painting installation according to claim 15, characterized in that the monitoring device is configured for measuring solvent agent concentration and in that the control device comprises a valve controlled depending on the solvent concentration.
17. The painting installation according to claim 15, characterized in that the monitoring device is configured for monitoring the amount of the solvent agent fed in and in that the control device is configured for controlling the proportion of re-circulating air which is fed to the outgoing air cleaning device (40), depending from the amount of the fed-in solvent agent.
18. The painting installation according to any of the preceding claims, characterized in that the spraying cabin (12) is separated from the outside by doors (99, 100, 103, 104) or by ingoing and outgoing locks (92, 96).
19. The painting installation according to claim 18, characterized in that the spraying cabin comprises a lock (98, 102) having double doors (99, 100, 103, 104) which are controlled so that always only one outer door (100, 104) or one inner door (99, 103) can be opened.
20. The painting installation according to any of the preceding claims, characterized in that a conveyor (90) for conveying parts (30) through the spraying cabin (12) is provided, in that an ingoing lock (92) and an outgoing lock are provided, and in that the locks (92) are configured as channels connected to the inner part of the spraying cabin (12) and extending slanted and upwardly to the outside.
21. The painting installation according to claim 20, characterized in that the locks (92) each are closed by a lower edge (94), and wherein the lower edges (94) are arranged at a level being at least at the level of the conveyor (90) at which the conveyor (90) extends within the spraying cabin (12).
22. The painting installation according to any of the preceding claims, characterized in that the air conditioning devices (36) or the air feeding devices (38) are equipped with filters (105, 105a) which can be passed through in vertical direction.
23. The painting installation according to any of claims 4 to 22, characterized in that the proportion of the air fed to the outgoing air cleaning device (40) is controlled so that the solvent agent concentration is in a range between 2 and 20 g/m³, preferably in a range between 2 and 10 g/m³, particularly preferred in a range between 2 and 5 g/m³.
24. The painting installation according to claim 23, characterized in that the outgoing air cleaning device (40) comprises a cold trap for condensing solvent agent.

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