EP2467210A2

EP2467210A2 - Exhaust device

Info

Publication number: EP2467210A2
Application number: EP10745573A
Authority: EP
Inventors: Heinrich Stumpf
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-08-19
Filing date: 2010-08-18
Publication date: 2012-06-27
Also published as: DE102009038069A1; WO2011020609A2; WO2011020609A3

Abstract

The invention relates to a method for extracting and cleaning contaminated air occurring during the application of paint. The method comprises generating an airflow toward a suction device, guiding at least part of the airflow from the environment of the surface of an object to be painted to the suction device, wherein the airflow is constricted toward the suction device. The method further comprises guiding at least part of the airflow past a surface of a filter of the suction device, by means of an air guide device, wherein said part of the airflow gradually enters the filter. The method can comprise the deposition of particles entrained by the contaminated air on the air guide device.

Description

suction

FIELD OF THE INVENTION The invention relates to a device for sucking off contaminated air arising during surface coating, in particular during painting, the impurities being caused, for example, by solvent vapors, aerosols or paint mist. Background of the invention

To repair damage in surface coatings, a new coating or optionally several coatings can be applied to a surface to be repaired. A coating can be produced by spraying on a coating substance. For spraying devices can be used, which operate with adjustable air pressure or - negative pressure. Optionally, after the spraying of the coating material further steps are necessary to allow a coating of the desired nature arise.

During spraying of the coating or during the following period, the air surrounding the surface to be repaired can become contaminated by gases, vapors or particles. These air pollutants can have negative effects. In particular, they can be harmful to health and / or worsen the coating result. In a special application of surface coating, small to medium damage to paintwork such as scratches in automobiles is repaired, also called spot repair. Using an aerosol can, such as a spray can, the paint and, if necessary, paint primer layers are sprayed onto the damaged surface of the automobile. In this spraying it comes to air pollution, namely on the one hand to a paint mist, also called Lackoverspray, which may contain particles and consists of the proportion of the paint that does not come to the surface to be painted or rebounds from it and remains in the ambient air. The paint mist can adversely affect the painting result by settling on the surface surrounding the surface to be painted and necessitating aftertreatment of this "fogged" surface, for example by polishing vaporizing the solvent will give rise to gases or vapors, especially solvent vapors, which may be harmful to health.

It is therefore an object of the invention to reduce the negative effects of the paint mist and to protect the painter and possibly the people in his vicinity from air pollution.

The object of the invention is achieved by a device according to claim 1. Further advantageous embodiments of the invention are defined in the dependent claims. Fig. Ia shows a plan view of a suction device according to a first

Embodiment of the invention;

Fig. 2a shows a plan view of a suction device according to a second

Embodiment of the invention;

Fig. 2b shows a plan view of the suction device according to the second

Embodiment of the invention; Fig. 2c shows a front and a view of the suction device according to the second embodiment of the invention;

Fig. 3a shows a plan view of a suction device according to a third

Embodiment of the invention;

3b shows a top view of a further embodiment of the suction device according to the third embodiment of the invention.

3 c shows a frontal view and a view of an inventive air supply device

FIG. 3d shows a side view and a view of the supply air device according to the invention

3e shows a sectional view along the line A-A in FIGS. 3b and 3c of the supply air device according to the invention

3f shows a plan view of a further embodiment of the suction device according to the third embodiment of the invention.

4 shows a perspective view of the suction device according to the invention according to the first, second and third embodiment of the invention

Detailed Description of the Preferred Embodiments

Figure 1 shows a plan view of a suction device according to a first embodiment of the invention. On an object 1 with a surface 2 to be coated, which may be approximately a part of the body of an automobile, the surface 2 to be coated is located between a point 2a and a point 2b. For coating, spraying means 3 are used, which may be a paint spray gun or a spray can. These means 3 produce a spray containing the necessary components for coating such as paints, particles, paint, binders, solvents, aerosols and / or the like. The spray jet is generated by means of an air overpressure in the spraying means 3. The components of the spray jet are largely transported by means of a spray air flow. When spreading in space becomes widen the spray. An advantageously large part of the spray jet will strike the surface 2 to be coated and contribute to the coating there. From the other part of the spray develops, which spreads in consideration of the Directionality of the spray and possibly in an attenuated spray air flow in space and possibly also settles on non-coated surfaces. At the same time, the newly applied coating can be used to escape gases which may form during the curing of the coating and vapors, in particular solvent vapors. In Fig. 1, numeral 4 designates the spray jet and air contaminants comprising spray, gases and vapors.

In order to avoid the negative effects of air pollutants, such as poorer paint results and health risks, the polluted air is extracted. For this purpose, a planar air guiding device 5 and a suction device 6 are provided according to the invention. The suction device 6 is adapted to generate an air flow directed towards the suction device 6. For this purpose, the suction device 6 may comprise a fan with a filter mounted in front for cleaning the contaminated air. From the suction device 6 but also a corresponding air flow via an exhaust air duct 14 as shown in Fig. 2b can be sucked directly. The spoiler 5 consists essentially of a sheet material, such as paper, foil or a mat. Preferably, the sheet material is flexible, so that it can be adapted to the contour of the object 1 and easily arranged in the vicinity of the surface 2. The spoiler 5 is spread between the object 1 and the aspirator 6 so as to help direct the air flow from the surface to the aspirator 6. The spreading can be done by clamping the spoiler 5. When spreading the spoiler 5 can be supported by rods in the guide. While a part of the air flow can occur directly in the suction device 6 during suction, another part is first led past the spread air guiding device 6. The generated by the Ansaugvomchrung 6 and by the Luftleit- Device 5 influenced air flow also detects the contaminated air, which is transported away. The negative effects of air pollution can be reduced or even avoided altogether. The suction device 6 can generate an air flow which is uniform in the horizontal extent of the inlet opening. The suction device 6 may have one or more flaps, in particular sheet metal flaps forming one or more funnels, or one or more separate funnels to influence the air flow. The suction device 6 should be sufficiently dimensioned in its horizontal extent and / or its suction power for the application and be suitable for generating a sufficient air flow. Spraying in a preferred direction can aid in the extraction of the contaminated air. The air guiding device 5 can make it possible to influence the speed and / or direction of the air flow and if necessary to focus it, so that the spray jet is influenced as little as possible by the air flow. This avoids that the coating result is significantly changed negatively, since any influence on the spray jet can worsen the coating result. The air guiding device 5 may have a height that extends over the entire vertical extent of the inlet opening of the suction device 6.

In a particularly advantageous embodiment, the Luftleitvonϊchtung 5 is suitable for separating air contaminants, in particular particles in the paint mist. For this purpose, the spoiler 5, for example, made of paper or a filter mat. The spoiler 5 is arranged so that when passing the spoiler 5 many components of the air contaminants, especially particles such as paint particles, meet the air deflector 5 and settle there. The air guiding device 5 can thus pre-deposit a large part of the particles of the paint mist on the air guiding device 5. In the Different color particles will be mainly the larger color particles. If the suction device comprises a filter which also filters out the particles of the paint mist, the air guiding device 5 reduces the amount of particles that hit the filter to a residual amount. The filter of the suction device therefore does not have to be so powerful, which in turn contributes to the fact that the suction device can be designed as a mobile device. Furthermore, the filter does not stick so fast and has longer maintenance time intervals. In a further advantageous embodiment, the air guiding device 5 is suitable for covering those parts of the object 1 which are not to be coated. For this purpose, the spoiler 5, for example, made of paper or foil. To cover parts of the object 1, for example an automobile, it can be releasably connected to the object 1, for which purpose adhesive strips can be used. The spoiler 5 may be adapted to be adapted to parts of the contour of the object 1 without great expenditure of time, for example by bending right and / or cropping.

Since the spoiler 5 is heavily soiled when used to separate paint particles or to cover the object 1, the air guiding device 5 should be properly disposed after applying one or more layers or before coating the surface of a next object and by a new air guiding device 5 can be replaced. The spoiler 5 may preferably be made of an inexpensive material, such as paper or foil, for such use. Furthermore, the air guiding device 5 can preferably be spread out from a reservoir 7. The reservoir may include material for multiple spreading of the spoiler 5, even if the deployed portion of the spoiler 5 is separated and / or disposed of after use. The reservoir 7 may be a roll, for example a paper roll. The reservoir 7 may be detachably mounted and / or displaced at various positions on the suction device 6, Thus, the suction device is easy to use on different sides (right and left) of the object 1. For example, the suction device 6 may have on two opposite sides (right and left) a vertically oriented rod on which a roll of Luftleitvorrichtungsmaterial can be inserted, for example, a paper roll. If the suction device is placed on one side of the object 1, it is generally better to place the roll on one side of the suction device 6. If the suction device is placed on the other side of the object 1, the roller can be plugged on the other side of the suction device 6.

The suction device 6 may comprise a filter. The filter can consist of activated carbon. The filter can comprise several layers. Each layer can be in direct contact with the next layer. A first layer may be a coarse filter which is suitable for filtering particles, in particular large particles such as color particles, from the air stream. The coarse filter can be arranged in front of an activated carbon filter for filtering out solvents. A coarse filter mat can be arranged between the coarse filter and the activated carbon filter. The filter, in particular the activated carbon filter, can be set up and optionally dimensioned so that it is flowed through sufficiently slowly, in particular in such a way that there is sufficient contact time with solvents and solvent vapors in order to ensure effective filtering, in particular adequate filtering of solvents. to ensure.

The suction device can also be designed and used for painting commercial vehicles, aircraft, military vehicles, etc. In particular, for these applications, the suction device can be adjustable in height. For this purpose, the suction device 6 and, if appropriate, the air guide device 5 can be mounted on a lift, or have a motor with which at least the height of the inlet opening of the air flow and, if appropriate, of the air guiding device can be changed. The suction device can be mobile. For example, it can be mounted on wheels. Fig. 2a shows a plan view of a suction device according to a second embodiment of the invention. This embodiment comprises a suction device 6 for sucking contaminated air, which arises during surface coating, in particular painting. The suction device 6 can be used independently of the first embodiment of the invention. However, it can also be used in the device according to FIG. 1, that is to say in combination with a planar air guiding device 5, as shown in FIGS. 2a and 2b. In fact, satisfactory cleaning of the contaminated air will often be achieved only when the coarse paint particles are pre-deposited on the spoiler 5 of the first embodiment, and the remaining contaminants are filtered out with the second embodiment described below. The suction device 6 is adapted to generate an air flow directed toward it. In the embodiment shown in Figure 2a, the filter 9 has a substantially cylindrical shape; However, the filter 9 can have any shape, in particular those with a rectangular, square or oval cross-section. The filter 9 may have open end faces. It may be constructed as described with reference to Figure 1, the different layers then forming concentric circles or ovals in the case of a round or oval cross-section filter. The filter 9 may be rotatably arranged. Turning the filter can reduce or avoid uneven use. The suction device 6 also comprises an air guiding device 8, which may be wholly or partly made of paper, for example. The suction device 6 may have an air guide 10, in particular in the interior of the filter, which is adapted to suck air from the suction device 6. The suction device 6 may also include a fan, which is arranged on an end face of the suction device 6, for example, the upper end side and sucks air from the air duct 10. An air guiding device 5 can be arranged on the suction device 6, as described in the example of FIG. If necessary, the air flow partly hits the filter directly. However, another, preferably essential part of the air flow is guided by means of an air guiding device 8 between the filter surface and the air guiding device 8. The air flow, sucked by a negative pressure on the other side of the filter, gradually enters the filter. The flow velocity of the air stream decreases with increasing passage along the filter. The air flow enters the filter as a whole at a lower speed than that which it has at the inlet of the air duct between the filter 9 and the air guiding device 8. By the air flow results in an advantageous manner that the flow through the filter 9 is slowed down. This makes the filter 9 more efficient because, for example, an activated carbon filter layer gets more time to filter out the air contaminants such as solvents and aerosols. The air duct has the further advantage that at least part of the intake air does not hit the front of the filter and the air flow thus contributes to the fact that the particles contained in the contaminated air do not bounce off the filter.

In a preferred embodiment, the direction of the air flowing through the air guide is also changed by means of the Luftführungsvorrich- device 8. Particularly preferably, the change in direction is carried out continuously, as in the case of the circular air duct in FIG. 2a. In this preferred embodiment, a third advantage of the air guide is that paint particles contained in the contaminated air can be deposited on the air guide device 8, similar to the air guide 5 in Figure 1. Here, the deposition by the change in direction of the flowing air, the particles due to its inertia drives to the edge and thus for deposition on the air guide device 8 supports. The effect is similar to that in a centrifuge. Thus, while in filter systems of the prior art, the wet paint particles of the paint coat heavily contaminate the filter and clog quickly, so that it must be replaced frequently, is in the filter system according to the present With the aid of centrifugal force, a large part of the wet and hence heavy color particles are deposited on the air-guiding device 8, so that the filters can be used much longer.

Since the air guiding device 8 is heavily contaminated in this case, it should be possible to replace it after one or more coating operations. For this purpose, it is advantageous if the air guiding device 8 consists of a low-cost material, for example paper or foil. The suction device 6 may comprise a reservoir 7 from which the air guiding device 8 is spread around the filter. The reservoir 7 may comprise material for multiple exchanges of the air guiding device 8. As in the first embodiment, the reservoir 7 may be a roll, in particular a paper roll. The suction device 6 may comprise a vertically oriented rod, on which the paper roll can be inserted, and which can be adjustably attached to different locations of the suction device 6. The air guiding device 8 can be mounted by unwinding a piece of paper from the roll of the reservoir 7 and laying it in an arc around the suction device 6. This arc describes in plan view approximately a semicircle. The so stretched air guide device 8 can be easily disposed of, in particular by tearing or cutting off the reservoir.

The air duct 8 from the duct 8 can be guided or supported by rods (not shown) and / or by guides 21, in particular guide plates, in particular if it is made of paper. For example, a guide plate, the suction device 6 at the upper and / or lower end side annular completely or partially surrounded, wherein the diameter of the guide plate is greater than the diameter of the filter. In a preferred embodiment, the Absaugvonϊchtung after the second ^'embodiment of a planar Luftl eitvorri rect 5 which, as in the may be configured with reference to the figure 1 described first embodiment of the invention, but not necessarily. With the air guiding device 5, at least one (preferably essential) part of the air flow is guided in a wedge shape to the inlet of the air duct between the filter 9 and the air guiding device 8 and focused there. In the case shown in FIG. 2a that the suction device 6 according to the second embodiment is used in the device according to FIG. 1, the air guiding device 8 and the air guiding device 5 can be formed from a coherent piece of material, in particular a coherent paper. In the case shown in FIG. 2a, the deposition is assisted by the extension of the path at which deposition is possible, ie first along the air guiding device and then along the air guiding device.

Fig. 2c shows a frontal view of an embodiment of the suction device according to the second embodiment of the invention. 2c, the extraction device comprises an intake device 6 with a reservoir 7 in the form of a paper roll, which is attached to a holding device, in particular a vertical rod 26, a cylindrical filter 9, which surrounds an air guide 10, a fan 13 at the upper end, an exhaust duct 14, a stand 15, or, if the rod 23 is to be detachably mounted on both sides of the suction device 6, two mounting devices 24 for the rod 23, a wider annular guide, in particular a guide plate 22 at the upper end face and a narrower annular guide, in particular a guide plate 25 at the lower end face. The stand 15 can be height-adjustable and have a pivot connection for pivoting the body of the suction direction. The stand 15 may be motorized for adjusting the height and / or for pivoting. Rollers may be mounted on the stand (not shown) so that the suction device can be easily pushed to its place of use, which contributes to its mobility. In Fig. 2c, the air guide device 8 is not yet attached. It can be set up by unwinding a piece of paper from the roll 7 formed as a roll and laying it around the suction device 6 in an arc guided by the upper guide plate 22 and the lower guide plate 25. The rod 23 carrying the paper roll is in Fig. 2 attached to the left side of the suction device 6. However, it can be removed from there and attached to the opposite side of the aspirator 6. This is particularly advantageous if the paper is also used as an air guiding device 5 as in the first embodiment. In this case, as described above, the air guiding device 5 may be selectively mounted on any of two opposite sides of the suction device, so that the suction device can be placed on each of two opposite sides of an object 1. Fig. 3a shows a top view of a suction device according to a third embodiment of the invention. This embodiment comprises a suction device 6 for sucking contaminated air, which arises during surface coating, in particular painting. The suction device 6 is placed in the vicinity of the object 1 so that it at least partially sucks the vapors produced during painting. The aspirator 6 may (but need not) be configured as described in the first embodiment with reference to FIG. 1 and / or as described in the second embodiment with reference to FIG. In particular, as shown in FIG. 3 a, a planar air guiding device 5 can be spread out between the suction device 6 and an object 1 to be painted. Furthermore, the suction device 6 can clean the sucked air through a filter 9 or the like. It may also have an air guiding device 8, as shown in Fig. 3a.

In addition to the suction device 6, the suction device according to the third embodiment comprises a supply air device 11. The supply device 11 is suitable for supplying an air flow directed away from the supply air direction 11 produce. It can be placed in the vicinity of the object 1 such that the air flow generated by it passes at least partially into the air flow of the suction device 6, wherein it can at least partially pass through a surface 2 of an object 1 to be painted. Thus, there is an air flow between the supply air device 11 and the intake device 6. The supply air device 11 compensates for the negative pressure which arises due to the intake of the intake device 6. The painter can be located with his body and in particular his head substantially outside the air flow. Only his arm with the spraying 3 dips into the air stream. Thus, the painter is protected from the inhalation of harmful vapors and aerosols, and from contamination of his body by the paint particles.

The supply air device 11 may comprise means for heating the generated air flow. The heated air stream can be used to dry the surface to be coated 2 and shorten the drying time, especially in water-based paints. The supply air device 11 may comprise a Luftleitvonϊchtung (not shown), which is adapted to advantageously direct the generated air flow to the surface 2. The air duct may comprise slats. In a particularly advantageous embodiment, the supply air device 11 is adapted to allow air to flow out, which contains less impurities than normal ambient air, in particular less dust particles. For this purpose, the supply air device 11 may comprise a filter, for example a filter having the paint filter quality F5. The suction device 6 permanently sucks in the ambient air and thus also generates an air flow which passes through the surface 2 to be painted. This has, if no supply air device 11 is used, the result that the dust particles contained in the normal ambient air on the moist and sticky surface 2 deposit. In contrast, by generating a very clean air flow between the supply air from the guide 11 and the suction device 6, around the surface to be painted 2 around, targeted and localized an open (not completely enclosed by side walls) but still be spanned almost dust-free space. Within this low-dust chamber even a separate hot air blower (not shown) can be operated and directed to the surface 2 for drying the wet paint layer, without the surface 2 would dust. The generation of the low-dust space thus has the advantage that the surface to be painted 2 less contaminated and the coating result is improved. The need for after-treatment, in particular polishing of the painted surface 2, is reduced or even eliminated altogether. Since polishing represents a large part of the work involved in painting, the painting can thus be done much faster and therefore more cost-effective.

In the embodiment of FIG. 3b, in the third embodiment of the invention, the suction device 6 is connected to the supply air device 11 by an air supply 12, which may be designed, for example, as a flexible hose. The air supply 12 is suitable for supplying the air flow drawn in by the intake device 6 entirely or partially to the supply air device 11. This makes it possible to operate the supply air device 11 without its own fan for generating the air flow. Also, in the case where the purity of the air reached in filtering by the suction device 6 is higher than the purity of the ambient air, this purity can be advantageously used for the supply air device 11 and relieve or even eliminate a filter in the supply air device. Conversely, in the case that the air emerging from the suction device 6 has a lower purity than the ambient air, can contribute (additional) filtering in the supply air device 11 to relieve the ambient air. Furthermore, the suction device with the air supply 12 is adapted to suck a portion of the air flow generated by the supply air device 11 with the suction device 6 and the supply air device 11 to supply again. At least the recirculated air feels like a closed circuit. This makes it possible, in particular in the event that the air discharged from the supply air device 11 heated as described above is to keep the air flow generated by the supply air device 11 with low heat output to temperature.

In a preferred embodiment, the supply air device 11 or the air supply 12 have means for reducing the generated air flow. The means may be adapted to reduce the air flow adapted to individual treatment steps during coating, in particular during spraying, drying and the like. The reduction can be electrically controlled and actuated, for example, by a footswitch or handswitch. The means may also be used with the spraying means 3, e.g. a paint spray gun are coupled so that the air flow is automatically reduced while the means for spraying 3 are operated. In fact, during the spraying process, the amount of air supplied into the area around the surface 2 increases in the short term because of the spray jet, possibly even greatly increased, and generates an overpressure. This can result in the paint mist and other paint vapors expanding out of the intake area of the intake device 6, and that the intake device 6 can no longer generally ensure that the paint vapors are sucked off. By reducing the air flow generated by the supply air device 11 in the short term, this negative sequence can be reduced or avoided altogether. However, reducing the air flow generated by the supply air device 11 should only last as long as it is being sprayed, so that after the end of the spraying process no negative pressure is created which would cause the low-dusty space described above to collapse.

In the case illustrated in FIG. 3 b, when the air supplied from the suction device 6 is supplied to the supply air device 11 via an air feed 12, the air flow generated by the supply air device 11 can be reduced by reducing the quantity of air flowing through the air supply 12 Air supply 12 recirculated air is reduced approximately by the opening of a valve. For this purpose, the supply air device 11 may comprise, for example, a T-air duct, into which the air Feeder 11 opens, as shown in Fig. 4. The T-air duct could also be integrated in the air supply 12. The T-air duct can be opened to drain incoming air. At the T-air guide, another filter may be arranged, which is adapted to filter the discharged air.

FIG. 3c shows a front and a view, FIG. 3d shows a side view and a view, and FIG. 3e shows a sectional view along the line AA in FIG. 3c and 3d of an embodiment of the supply air device according to the invention. The supply air device 11 comprises a housing 26, which may be made of aluminum, for example. The housing 26 has a volume that is large enough that a uniform pressure can develop therein so that the supply air device 11 can deliver a uniform air flow through its outlet surface. The housing 26 has an air supply port 16 on which the above-mentioned air supply 12 (not shown), possibly via a T-air guide (not shown) can be applied. The supply air device 11 further comprises a connection for hot air supply 17 for generating a heated air flow, a Zuluftfil- ter 18 which can be attached via a Rahmenhalterang 19 on the housing 26. The Zuluftfϊlter 18 covers the entire outlet surface of the supply air device 11 from. The housing is supported by a stand 20. The stand 20 is suitable for making the housing 26 of the supply air device 11 adjustable in height and pivotable. Furthermore, the stand 20 has rollers which allow the supply air device 11 to be easily pushed to its place of use and thus contribute to the mobility of the supply air device 11. Fig. 3f shows a plan view of an embodiment of the third embodiment of the invention with a second suction device 6 '. In addition, a second air guiding device 5 'and a second reservoir 7' are also included. Depending on an air supply 12, 12 'of each of the suction device 6, 6' to the supply air device 11. This arrangement can produce two air streams which are suitable, especially in a spraying without preferential direction to sufficiently suck the contaminated air. The suction device according to FIG. 3f may additionally comprise a horizontally arranged supply air device 11 with downwardly directed outlet. The supply air device 11 is suitable for being arranged horizontally between the two intake devices 6, 6 'and above the surface to be painted.

The outlet of the supply air device 11 may be divided in the longitudinal direction (not shown). A part may be so formed, in particular by partial covering, for example with a pinhole, that less air flows out of it than from the other part. The covered part can be arranged horizontally closer to the surface 2 to be painted. Thus, a first downwardly directed airflow farther away from the surface 2 is stronger than the second downwardly directed airflow closer to the surface 2. This has the effect of creating an air barrier in front of the surface 2, which helps to make the low-dust space around the surface 2 more stable with reduced air turbulence. The described split-outlet supply air device 11 can also be used in other embodiments of the third embodiment of the invention, for example as described in relation to FIG. 3a.

Fig. 4 shows a perspective view of the suction device according to the invention according to the first, second and third embodiment of the invention. In FIG. 4, the object 1 is a motor vehicle. The surface to be painted 2 is located between the bumper and the right fender. Around the surface 2 to be painted, the suction device 6 was set up on the left side, which is constructed essentially as described with reference to FIG. 2c. On the right side, the supply air device 11 has been set up, which is constructed essentially as described with reference to FIGS. 3c, 3d and 3e. The Zuluftvomchtung 11 comprises a dust filter (not shown), so that by the air flow from the supply air device 11 to the suction device 6 out of- but still low-dust space is spanned. Furthermore, the sucked by the Ansaugvoπchtchtung 6 air is returned via the air guide 12 in the form of a flexible hose to the supply air device 11. Between the hose 12 and the supply air device 11, a T-air guide is mounted, which can be opened to temporarily reduce the air flow recirculated to the supply air device 11 as described above with reference to FIG. Parts of the motor vehicle 1, on which the paint jet is not intended to hit, have been covered by means of the air guiding device 5 and fixed with adhesive strips (not shown). The spoiler 5 is made of paper, which is fed by the roller 7. This paper forms in its near-roll section around the filter an air guide 8 which operates as described above with reference to the second embodiment.

Claims

claims

A method of vacuuming and cleaning contaminated air resulting from painting comprising:

Generating an airflow toward an aspirator;

Directing at least a portion of the airflow from an environment of a surface to be painted of an object to the aspirator, thereby narrowing the airflow to the aspirator;

Passing at least a portion of the airflow past a surface of a filter of the aspirator by means of an air ducting device, the portion of the airflow gradually entering the filter.

2. The method of claim 2, further comprising:

Separating entrained by the contaminated air particles at the Luftführungsvorri ring.

3. A device for the suction and cleaning of contaminated air resulting from painting, comprising:

an aspirator adapted to generate an airflow directed to the intake manifold;

an air guiding device which can be arranged so as to extend from an object having a surface to be painted to the suction device, and at least a part of the air flow through the air guiding device to

Suction device is directed, wherein the air flow is narrowed to Ansaugvonϊchtung out;

a filter; and

an air guide convection disposed so that the portion of the airflow flowing into the inlet of the air guide is passed along a surface of the filter so that the air flow may gradually enter the filter.

4. The apparatus of claim 3, wherein the air guide device and the filter surface are configured so that the direction of the air flowing between them changed and thus a separation of entrained by the contaminated air particles is facilitated.

5. Apparatus for extracting contaminated air resulting from painting comprising:

an aspirator capable of generating an airflow directed toward the aspirator, and

a planar air guiding device, which is adapted to be spread between an object with a surface to be coated and the suction device so that it helps to direct the air flow from the surface to the suction device and thereby to separate paint particles from the contaminated air.

6. The device according to claim 5, wherein the spoiler is adapted to be adapted at least to a part of the shape of the object and / or to cover the object.

7. Device according to one of claims 5 or 6, wherein the suction device comprises a filter, in particular an activated carbon filter, which cleans the air flow of solvent vapors and aerosols.

8. Device according to one of claims 5 to 7, wherein the Ansaugvorrich- device comprises an air guide device which is adapted to guide at least a portion of the air flow along the filter.

9. Device according to one of claims 5 to 8, further comprising:

a second suction device adapted to generate a second airflow directed toward the second suction device, and a second air guiding device adapted to be deployed between the object and the second aspirator so as to assist in directing the second airflow from the object to the second aspirator.

10. Device according to one of claims 5 to 9, further comprising

a supply air device which is adapted to generate an air flow directed away from the supply air device and is suitable to be placed so that the air flow generated by it at least partially passes the surface to be painted and at least partially in an air flow of a Ansaugvorrich- device or at least partially merges into both air streams of both intake devices.

11. The apparatus of claim 10, wherein one or both of the suction devices are connected to the supply air device via an air supply.

12. The apparatus of claim 10 or 11, wherein the supply air device comprises a filter which cleans the air of the air stream generated before exiting the supply air device in particular of solid particles, such as dust particles.

13. The apparatus of claim 10 to 12, wherein the supply air device is adapted to be arranged horizontally between two suction devices and vertically over at least the surface to be painted.

14. Voπichtung according to claim 10 to 13, wherein the supply air means comprises means to reduce the generated air flow.

15. The apparatus of claim 10 to 14, wherein the outlet of the supply air device is divided in the longitudinal direction and a part is formed, in particular by partial covering as with a pinhole that out of him less air flows out than from the other part.

16. A method for aspirating during surface coating, especially during painting, resulting contaminated air, comprising:

Setting up a suction device in the vicinity of a surface of an object to be coated,

Spreading a planar air guiding device between the object and the suction device, so that an air flow can be conducted from the surface to the suction device,

Generating an air flow towards the aspirator, which is passed through the air guiding device,

Depositing paint particles from the contaminated air at the spoiler.

17. The method of claim 16, wherein

the air guiding device is at least partially adapted to the contour of the object in the vicinity of the surface to be coated, and / or

the air guiding device covers at least parts of the surface of the object which is not to be coated and protects against coating.

18. A device for suctioning and cleaning contaminated air resulting from painting, comprising:

a movable suction device adapted to generate an air flow directed towards the suction device and to be placed near an object to be painted so as to at least partially draw off the contaminated air resulting from painting;

a movable supply air device which is adapted to one of

Supply air device directed away air flow and to be placed in the vicinity of the object to be painted so that the air flow generated by it at least partially passes into the air flow of the aspirator,

an air supply which is suitable for supplying all or part of the air taken in by the intake device to the supply air device, wherein the air flowing out of the supply air contains less impurities, in particular dust particles, than normal ambient air.

19. The apparatus according to claim 18, wherein the suction device comprises a filter for cleaning the sucked air.

20. The apparatus of claim 18 or 19, wherein the supply air device has a filter for cleaning the air flowing out of it.

21. Device according to one of claims 18 to 20, wherein the device comprises means for temporarily reducing the air flow generated by the supply air device.

22. The apparatus according to claim 21, wherein the means for temporarily reducing the air flow generated by the supply air device can reduce the air flow by reducing the proportion of the intake air sucked by the intake device, which is supplied to the supply air device via the air supply.

23. A method of vacuuming and cleaning contaminated air resulting from painting comprising:

Placing a movable suction device capable of generating an air flow directed toward the suction device in the vicinity of an object to be painted;

Extracting the polluted air produced during painting at least partially;

Placing a movable Zuluftvomchtung, which is adapted to generate a directed away from the supply air device airflow, in the vicinity of the object to be painted;

Generating an air flow through the supply air device, so that the air flow at least partially merges into the air flow of the intake device; Feeding all or part of the intake air sucked by the intake air,

Cleaning the air discharged from the supply air device so that it contains less impurities, in particular dust particles, than normal ambient air.

24. The method of claim 23, further comprising:

Reducing the air flow generated by the supply air device during a spraying process as part of the painting.

25. The method of claim 24, wherein the air flow generated by the supply air device is reduced by the proportion of the sucked by the intake air, which is supplied to the supply air device, is reduced.