EP2244840B1 - Device and method for supplying air to an application zone of a paint booth - Google Patents

Description

The present invention relates to a device for supplying air to an application area of a paint shop, comprising a circulating air circuit and at least one conditioning unit, which conditions at least a part of the air guided in the circulating air circuit, wherein the device comprises at least one humidity conditioning unit.

Such devices for supplying air to an application area of a paint shop are known from the prior art.

The supply of air to an application area of a painting installation takes place in the known devices in that a total air flow to be conditioned passes through a plurality of successive conditioning units. For example, the total air flow is first moistened in a conditioning unit and then heated in a further conditioning unit.

The US 5,922,130 A , the FR 2 525 926 A and the WO 2008/107056 A disclose devices according to the preamble of claim 1.

The present invention has for its object to provide a device for supplying air to an application area of a paint shop of the type mentioned, which allows a particularly energy-efficient operation.

This object is achieved by a device according to claim 1.

The solution according to the invention has the advantage that the total air flow guided in the device does not have to flow through each conditioning unit one after the other. Rather, different flow paths are provided for at least two partial air streams, wherein the at least two partial air streams in the different flow paths can be differently conditioned.

The device is particularly energy efficient due to the reduced flow resistance, which results from the fact that not every conditioning unit is flowed through by the total air flow in succession.

Since the different conditioning units are only flowed through by a partial air flow of the total air flow, they can be made smaller, more space-efficient and more energy efficient due to the lower flow.

In addition, a particularly simple control or regulation of the device can result from the fact that a total air flow must not be conditioned by means of a large conditioning unit, for example, with respect to a small change in temperature, but that, for example, by means of a smaller conditioning only a part of the total air flow current heated or cooled correspondingly stronger and then the unheated or cooled partial air flow of the total air flow is supplied again.

In one embodiment of the invention, an air humidity conditioning unit designed as an air humidification unit can be provided.

Alternatively, however, it is also possible to provide an air humidity conditioning unit designed as an air dehumidification unit.

According to a development of the invention, the device comprises at least one air temperature conditioning unit for influencing the temperature of at least one partial air flow.

In one embodiment of the invention may be provided as a heating unit formed Lufttemperaturkonditioniereinheit.

Alternatively, however, may be provided as a cooling unit formed Lufttemperaturkonditioniereinheit.

It is advantageous if the temperature of the at least one partial air flow can be regulated or controlled by means of the at least one air temperature conditioning unit.

In one embodiment of the invention, it can be provided that the device comprises at least one fan for driving at least one partial air flow guided in the recirculating air circuit, the fan being arranged downstream of an air temperature conditioning unit designed as a cooling device. Since a fan always heats an airflow passing through it, placing the fan downstream of a cooling device has the advantage that the air flow can be dehumidified more. In an arrangement of the fan upstream of a cooling device, however, the air flow is first heated and thus obstructing dehumidification, since the heated air from the fan can absorb more moisture.

It is advantageous if the device comprises at least one bypass line, by means of which at least one partial air flow can be guided past at least one conditioning unit without being conditioned by the same. In this way, a partial air flow, which already within a predetermined tolerance range, for example, already corresponding to a specification Air temperature and / or humidity, are supplied directly to the application area of a paint shop, without being conditioned by the conditioning unit.

It is particularly advantageous if the device comprises a first conditioning unit, a second conditioning unit arranged downstream of the first conditioning unit and at least one flow path branch arranged between the two conditioning units.

In this case, it can be provided, for example, that the first conditioning unit is designed as an air temperature conditioning unit and the second conditioning unit is designed as an air humidity conditioning unit. By means of a flow path branch arranged between the two conditioning units, an air flow which flows through the air temperature conditioning unit can be divided so that only a partial air flow of the air flow flowing through the air temperature conditioning unit flows through the humidity control unit. This is particularly advantageous when a relatively large change in temperature is to be achieved by means of the air temperature conditioning unit, but only a relatively small change in humidity by means of the humidity control unit.

Alternatively, it may be provided that the first conditioning unit is designed as a humidity conditioning unit and the second conditioning unit is designed as an air temperature conditioning unit. In this way, an air flow flowing through the air humidity conditioning unit can be divided by means of the flow path branch so that only a partial air flow of the air flow flowing through the air humidity conditioning unit is conditioned by means of the air temperature conditioning unit. This is particularly advantageous if a relatively large change in humidity is to be achieved by means of the humidity control unit, but only a relatively small change in temperature by means of Lufttemperaturkonditioniereinheit.

In a development of the invention, it can be provided that the device comprises a first conditioning unit, a second conditioning unit arranged downstream of the first conditioning unit, and at least one flow path junction arranged between the two conditioning units.

It can be provided that the first conditioning unit is designed as Lufttemperaturkonditioniereinheit and the second conditioning unit as Luftfeuchtigkeitskonditioniereinheit. Thus, the first partial air flow flowing through the air temperature conditioning unit can be brought together by means of the flow path combination with a second partial air flow. The resulting combined air stream can then be conditioned by means of the air humidity conditioning unit.

However, it can also be provided that the first conditioning unit is designed as a humidity conditioning unit and the second conditioning unit is designed as an air temperature conditioning unit. In this way, the first partial air flow flowing through the air humidity conditioning unit can be combined with a second partial air flow by means of the flow path combination. The resulting combined air stream can then be conditioned by means of the air temperature conditioning unit.

It can be advantageous if the device comprises at least one flow path branch and at least one fan for driving at least one partial air flow guided in the circulating air circuit, the fan being arranged upstream of the flow path branching. As a result, all partial air flows of the air flow divided by the flow path branching can be driven particularly easily on the pressure side.

Alternatively or additionally, it can be provided that the device has at least one flow path combination and at least one fan for driving at least one guided in the recirculation circuit Partial air flow, wherein the fan is arranged downstream of the Strömungswegzusammenführung. In this way, by means of the blower, the air flow originating from the at least two flow paths and brought together by means of the flow path combination can be driven on the pressure side.

According to a development of the invention, it can be provided that the device comprises at least two air inlets for the air flowing through the application area, wherein at least a partial air flow of the air flowing into a first air inlet at least in terms of its temperature by means of a Lufttemperaturkonditioniereinheit and at least a partial air flow in a second air inlet flowing air is conditioned at least in terms of its humidity by means of a humidity conditioning unit. This is particularly advantageous when only slight changes in temperature and / or changes in humidity in the air flow to be supplied to the application area of the paint shop have to be achieved by means of the conditioning units.

It is advantageous if the device comprises a supply air system for supplying supply air to the recirculation circuit and an exhaust system for discharging exhaust air from the recirculation circuit. In particular, it can be provided that the recirculation circuit by means of the supply air supply air in the form of indoor air, outdoor air and / or fresh air can be fed to renew the guided in the recirculation air.

In a particularly preferred embodiment of the invention can be provided that regularly or continuously a portion of the guided in the recirculation air is removed as exhaust air and replaced by supply air. As a result, an increasing pollution of the air guided in the circulating air can be avoided.

Under indoor air is to be understood in this description, the ambient air surrounding the paint shop.

Under outdoor air in this description, a building envelope, in which the paint shop is arranged to understand ambient air.

Under fresh air is to be understood in this description air from a pollutant-contaminated environment.

The present invention further relates to a method for conditioning air to be supplied to a painting installation, wherein at least part of the air is guided in a circulating air circuit.

The present invention has for its object to provide such a method which allows in an energy-efficient manner to condition the air supplied to an application area of a paint shop.

This object is achieved by a method according to claim 7.

The method according to the invention offers the advantage that a total airflow to be supplied to the application area does not have to flow through each conditioning unit individually one after the other. The guided in the different flow paths partial air flows are rather different conditions, so that the conditioning units can be made smaller, space-saving and energy efficient due to the lower flow.

It is advantageous if at least a part of at least one partial air flow is conditioned by means of at least one air temperature conditioning unit.

According to one embodiment of the invention, it can be provided that supply air is supplied to the circulating air circuit by means of a supply air system.

It is advantageous if the ratio of circulating air volume flow to supply air volume flow, that is, the ratio of air taken from the application area of the paint shop to additionally supplied air, is greater than four. Preferably, the conditioning units of the device then already make it possible to maintain the temperature and / or air humidity of the total air flow to be supplied to the application area of the paint shop in accordance with a specification. A preconditioning of the supply air is then unnecessary.

It is particularly advantageous if the ratio of circulated air volume flow to fresh air volume flow rate is from approximately 15: 1 to approximately 25: 1, preferably approximately 20: 1. Then only small temperature differences and / or differences in humidity must be compensated by means of the conditioning units, so that a particularly energy-saving operation of the device is possible.

The device according to the invention for supplying air to an application area of a paint shop is particularly suitable for carrying out the method according to the invention.

In a particularly preferred embodiment of the invention, no separate supply system for fresh air is provided. As supply air is only outside air in the form of indoor air, which is heated by a fan. Alternatively or additionally, a small heating coil may be provided to pre-condition the outside air.

According to a development of the invention, partial flow conditioning takes place in such a way that, on the one hand, it is cooled and, on the other hand, moistened in parallel.

• Reduzierung des Druckverlustes, da nicht der Gesamtluftstrom jede Konditioniereinheit nacheinander durchströmen muss;
• Energieeinsparung aufgrund des geringen Druckverlustes, da die Gebläse weniger Arbeit zum Antreiben des Luftstroms verrichten müssen;
• besseres Regelverhalten durch Teilstromkonditionierung (da im Teilluftstrom größere Temperaturunterschiede (ΔT) und größere Feuchteunterschiede (ΔX) auftreten als im Gesamtluftstrom);
• kompakte Bauweise, da kleinere Konditioniereinheiten ausgewählt werden können;
• gute Modularisierung der Kabinenzonen; und
• Einsparung von Investitionskosten.

The invention offers the following advantages in particular:

• Reduction of the pressure loss, since not the total air flow must flow through each conditioning unit in succession;
• Energy saving due to low pressure loss as the blowers have less work to do to drive the airflow;
• better control behavior by partial flow conditioning (since in the partial air flow larger temperature differences (ΔT) and larger differences in humidity (ΔX) occur than in the total air flow);
• compact design, as smaller conditioning units can be selected;
• good modularization of the cabin zones; and
• Saving of investment costs.

Since with the use of powder coating in the paint shop, the powder absorbs part of the humidity, it can be provided that the air to be conditioned is preferably supplied to the amount of water that is absorbed by the powder.

The inventive device for supplying air to an application area of a paint shop is in principle suitable for any paint shop.

Further features and advantages of the invention are the subject of the following description and the drawings of exemplary embodiments.

Fig. 1

eine schematische perspektivische Darstellung einer Lackieranlage mit einer Vorrichtung zum Zuführen von Luft zu einem Applikationsbereich der Lackieranlage, mit Blickrichtung auf eine Werkstückeintrittsseite einer Lackierkabine der Lackieranlage;

Fig. 2

eine schematische perspektivische Darstellung der Lackieranlage mit der Vorrichtung zum Zuführen von Luft aus Fig. 1, mit Blickrichtung auf eine Werkstückaustrittsseite der Lackierkabine der Lackieranlage;

Fig. 3

eine schematische Seitenansicht auf eine in einer Förderrichtung linke Seite der Lackieranlage mit der Vorrichtung zum Zuführen von Luft aus Fig. 1, in teiltransparenter Darstellung;

Fig. 4

eine schematische Draufsicht von unten auf die Lackieranlage mit der Vorrichtung zum Zuführen von Luft aus Fig. 1 in teiltransparenter Darstellung, mit Blickrichtung in Richtung des Pfeiles 4 in Fig. 3;

Fig. 5

eine schematische Draufsicht auf die Werkstückaustrittsseite der Lackierkabine der Lackieranlage mit der Vorrichtung zum Zuführen von Luft aus Fig. 1, mit Blickrichtung in Richtung des Pfeiles 5 in Fig. 3;

Fig. 6

eine schematische Draufsicht von oben auf die Lackieranlage mit der Vorrichtung zum Zuführen von Luft aus Fig. 1 in teiltransparenter Darstellung, mit Blickrichtung in Richtung des Pfeiles 6 in Fig. 3;

Fig. 7

eine schematische Draufsicht auf die Werkstückeintrittsseite der Lackierkabine der Lackieranlage mit der Vorrichtung zum Zuführen von Luft aus Fig. 1, mit Blickrichtung in Richtung des Pfeiles 7 in Fig. 3;

Fig. 8

eine schematische Darstellung des Umluftkreislaufs der Vorrichtung zum Zuführen von Luft aus Fig. 1;

Fig. 9

eine schematische Darstellung des Umluftkreislaufs einer zweiten Ausführungsform einer Vorrichtung zum Zuführen von Luft;

Fig. 10

eine schematische Darstellung des Umluftkreislaufs einer dritten Ausführungsform einer Vorrichtung zum Zuführen von Luft;

Fig. 11

eine schematische Darstellung des Umluftkreislaufs einer vierten Ausführungsform einer Vorrichtung zum Zuführen von Luft; und

Fig. 12

eine schematische Darstellung des Umluftkreislaufs einer fünften Ausführungsform einer Vorrichtung zum Zuführen von Luft.

In the figures show:

Fig. 1

a schematic perspective view of a paint shop with a device for supplying air to an application area of the paint shop, looking towards a workpiece inlet side of a paint booth of the paint shop;

Fig. 2

a schematic perspective view of the paint shop with the device for supplying air Fig. 1 facing the workpiece exit side of the painting booth of the painting installation;

Fig. 3

a schematic side view of a left in a conveying direction of the painting with the device for supplying air Fig. 1 , in semi-transparent representation;

Fig. 4

a schematic plan view from below of the paint shop with the device for supplying air Fig. 1 in semi-transparent representation, looking in the direction of arrow 4 in Fig. 3 ;

Fig. 5

a schematic plan view of the workpiece exit side of the spray booth of the paint shop with the device for supplying air Fig. 1 , looking in the direction of the arrow 5 in Fig. 3 ;

Fig. 6

a schematic plan view from above of the paint shop with the device for supplying air Fig. 1 in semi-transparent representation, looking in the direction of arrow 6 in Fig. 3 ;

Fig. 7

a schematic plan view of the workpiece inlet side of the spray booth of the paint shop with the device for supplying air Fig. 1 , looking in the direction of the arrow 7 in Fig. 3 ;

Fig. 8

a schematic representation of the recirculation loop of the device for supplying air Fig. 1 ;

Fig. 9

a schematic representation of the recirculation loop of a second embodiment of a device for supplying air;

Fig. 10

a schematic representation of the recirculation loop of a third embodiment of a device for supplying air;

Fig. 11

a schematic representation of the recirculation loop of a fourth embodiment of an apparatus for supplying air; and

Fig. 12

a schematic representation of the recirculation loop of a fifth embodiment of a device for supplying air.

Equal or functionally equivalent elements are provided with the same reference numerals in all figures.

One in the Fig. 1 to 7 illustrated, as a whole with 100 designated paint shop for painting workpieces, in particular of vehicle bodies 102, comprises a purely schematically illustrated conveyor 104, by means of which the vehicle bodies 102, which above a in Fig. 5 shown upper side 105 of the conveying device 104 can be arranged along a conveying direction 106 by an application area 108 of a designated as a whole by 110 paint booth can be moved.

The conveyor 104 may be formed, for example, as an inverted circular conveyor or as an inverted monorail conveyor.

The application area 108 is the interior of the painting booth 110, which is bounded on both sides of the conveyor 104 by a respective outer wall of the painting booth 110 designed as a booth wall 114 in a direction perpendicular to the conveying direction 106, which corresponds to the longitudinal direction of the painting booth 110.

On both sides of the conveying device 104, painting devices 116 designed as painting robots are arranged in the painting booth 110 (see FIG Fig. 2 . 3 . 5 and 6 ).

Under the spray booth 110, a cleaning device designated as a whole 118 is arranged. The cleaning device 118 is used for separating wet paint overspray from an air stream, which is passed through the application area 108 of the paint booth 110 down into the cleaning device 118.

The cleaning device 118 comprises a substantially cuboid filter chamber 120, which is bounded in the transverse direction 112 of the paint booth 110 by vertical side walls 122, which are substantially aligned with the side cabin walls 114 of the paint booth 110, so that the filter chamber 120 substantially the same extent in one to the conveying direction 106 has vertical and horizontal direction as the paint booth 110th

The side walls 122 form the lateral outer walls of the filter chamber 120.

In the filter chamber 120 a plurality, for example eight, filter devices 124 are arranged, in which regenerable surface filters are provided. The eight filter devices 124 are arranged in this embodiment in two rows of four filter devices 124, wherein the two rows are each aligned parallel to the conveying direction 106 and horizontally and with respect to a vertically and in the conveying direction 106 extending longitudinal center plane 128 of the painting booth 110 are arranged mirror-symmetrically to each other.

In the filter chamber 120 above the filter devices 124, an air supply device 129 is provided on both sides in this embodiment.

By means of these air supply devices 129, for example, an air curtain can be produced above the filter devices 124, which prevents settling of wet paint overspray on the upper side of the filter devices 124.

Under each filter device 124, a funnel-shaped receptacle 130 for receiving wet paint overspray and filter aid material, which is cleaned by the regenerable surface filters, is arranged in each case.

The interior of each filter device 124 is bounded on its side facing away from the longitudinal center plane 128 of the paint booth 110 by a respective base body 134.

Since each filter device 124 is associated with such a main body 134, the paint shop 100 in this embodiment comprises eight main body 134.

Each main body 134 in this embodiment comprises a cleaning device, not shown in the drawings, for periodically cleaning wet-paint overspray particles and filter aid material (precoat material), which have been infiltrated on the surface filters of the filter devices 124.

Below each main body 134 two vertical connecting channels 138 are arranged, which open into collecting channels 140 and allow fluid communication between the main bodies 134 and the collecting channels 140.

In this embodiment, two collecting channels 140 are provided, which extend below the main body 134 and the connecting channels 138 and are aligned parallel to the conveying direction 106.

The collecting channels 140 are formed with respect to the longitudinal center plane 128 mirror-symmetrical to each other and arranged and spaced from each other. They each include one of the longitudinal center plane 128 of the painting booth 110 facing inside 142, which is further spaced from the longitudinal center plane 128 of the painting booth 110 as the outer walls 132 of the filter devices 124th

The collecting channels 140 extend in a direction parallel to the conveying direction 106 substantially over the entire length of the painting booth 110 and have a taken in a direction perpendicular to the conveying direction 106 rectangular cross-section.

At the workpiece inlet side 144 of the painting booth 110 facing ends 146 of the collecting channels 140 is on the inside 142 of the collecting channels 140, ie on the longitudinal center plane 128 side facing the collecting channels 140, a fan 148 arranged (see in particular Fig. 7 ).

Above each of the two fans 148, a return line 150 is arranged in each case.

Each of the return lines 150 includes an adapter element 152 and a rectilinear return section 154, wherein the rectilinear return section 154 of the return line 150 is in fluid communication with one of the fans 148 by way of the adapter element 152.

The rectilinear return sections 154 of the two return lines 150 are aligned vertically and with respect to the longitudinal center plane 128 of the painting booth 110 mirror-symmetrical to each other and arranged and arranged spaced from each other.

The rectilinear return sections 154 comprise mutually opposite inner sides 156 facing the longitudinal center plane 128 of the painting booth 110 and outer sides 158 facing away from the inner sides 156.

The rectilinear return sections 154 have a rectangular cross-section taken in the horizontal direction.

The rectilinear return sections 154 are arranged on the painting installation 100 such that the inner sides 156 of the rectilinear return sections 154 have a smaller distance from the longitudinal center plane 128 of the paint booth 110 than the cabin walls 114 of the paint booth 110 and the outer walls 132 of the filter devices 124.

The outer sides 158 of the rectilinear return sections 154 each have a distance D from the longitudinal center plane 128 of the painting booth 110, which is smaller than the sum of the distance d1 between a booth wall 114 of the painting booth 110 and the longitudinal center plane 128 of the painting booth 110 and the distance d2 between the inner side 156 and the outer side 158 of the rectilinear return section 154 of the return line 150 (see FIG Fig. 6 and 7 ).

In one embodiment, not shown in the drawings, it can be provided that the outer sides 158 of the rectilinear return sections 154 are aligned with the cabin walls 114 of the paint booth 110.

The rectilinear return sections 154 of the return line 150 extend in the illustrated embodiment of a lower end 164 which is located approximately at the level of an upper edge 166 of the receptacle 130, vertically up to an upper end 160 which adjacent to a the paint booth 110 provided plenum 168 is arranged.

The rectilinear return section 154 thus extends over a height h that is substantially greater than the distance H between a bottom 175 of a filter cover 174 and the top 105 of the conveyor 104 (see FIG Fig. 7 ).

In this embodiment, the rectilinear return sections 154 are in fluid communication with the air supply devices 129 to permit supply of circulating air from the rectilinear return sections 154 directly into the filter chamber 120. For controlling the circulating air flow supplied to the air supply devices 129 from the rectilinear return sections 154, valves designed as blocking flaps 210 are provided (see FIG Fig. 8 ).

Furthermore, the air supply devices 129 are on both sides of the filter chamber 120 with one (in the Fig. 1 to 7 not shown) supply air system 194 (see Fig. 8 ) in fluid communication. To control the air supply devices 129 supplied from the supply air systems 194 supply air flow formed as supply air valves 196 valves.

At the upper end 160 of each rectilinear return section 154, a curved return section 162 is provided which is in fluid communication with the rectilinear return section 154.

The plenum 168 includes a substantially cuboidal chamber 170 which extends in the conveying direction 106 over substantially the entire length of the painting booth 110 and is delimited in the transverse direction 112 of the painting booth 110 by vertical side walls 172 connected to the lateral cabin walls 114 of FIG Paint booth 110 are aligned so that the chamber 170 has substantially the same horizontal cross-sectional area as the paint booth 110.

The side walls 172 form the lateral outer walls of the plenum 168.

The chamber 170 of the plenum 168 is separated from the application area 108 of the paint booth 110 by means of the horizontally oriented filter cover 174, the horizontal underside 175 of the filter cover 174 facing the application area 108 of the paint booth 110.

Above the filter cover 174 and parallel to it, there is provided a false ceiling 176 in the plenum 168 which divides the chamber 170 of the plenum 168 into an upper area 178 and a lower area 180.

In the false ceiling 176 a plurality, for example twenty-eight, safety filters 182 are arranged, which are used to remove any remaining in the air flow impurities in order to avoid any supply of contamination to the application area 108 of the paint booth 110.

The curved return sections 162 are disposed in indentations 184 of the side walls 172 of the chamber 170 (see, in particular Fig. 1 ).

The indentations 184 are aligned vertically and, for example, arranged on the workpiece inlet sides 144 of the painting booth 110 facing the ends of the side walls 172 of the chamber 170.

In the indentations 184 through openings 186 are provided, at which the curved return sections 162 open into the upper region 178 of the chamber 170 of the plenum 168.

In this embodiment, the indentations 184 extend over the entire height of the plenum 168 and over the entire height of the paint booth 110.

The rectilinear return sections 154 of the return lines 150 run partially within the indentations 184 and thus, compared to an arrangement of the rectilinear return sections 154 outside the indentations 184, have a smaller distance from the longitudinal center plane 128 of the paint booth 110.

In particular, it follows that the rectilinear return sections 154 extend at least partially both within an outer contour 111 of the paint booth 110 and within an outer contour 169 of the plenum 168 ( Fig. 7 ).

The outer contour 111 of the spray booth 110 is the outer boundary of the space area which, when each cross section of the spray booth 110 taken perpendicular to the conveying direction 106 is moved along the conveying direction 106 to the ends of the spray booth 110, is swept by at least one of these cross sections.

The movement of a cross section along the conveying direction 106 for determining the outer contour 111 takes place in such a way that the moved cross section is always aligned perpendicular to the local conveying direction. In a non-constant conveying direction 106 (in the case of a curved conveying path), therefore, a cross-section is correspondingly rotated during the movement to the ends of the painting booth 110 in accordance with the course of the respective local conveying direction.

Consequently, the outer contour thus defined always encloses a spatial region which is at least as large as the spatial region surrounded by the outer walls of the painting booth 110, but may also contain spatial regions lying outside the outer walls.

An object can therefore be arranged outside the area of space surrounded by the outer walls and yet within the associated outer contour.

The outer contour 169 of the plenum 168 is the outer boundary of the space area which, when each cross section of the plenum 168 taken perpendicular to the conveying direction 106 is moved along the conveying direction 106 to the ends of the painting booth 110, is swept by at least one of these cross sections.

The rectilinear return sections 154 extend vertically downwardly into the region of the filter chamber 120 and therefore extend at least partially within an outer contour 121 of the filter chamber 120, in which embodiment the outer contour 121 of the filter chamber 120 is the outer boundary of the spatial region, if any taken perpendicular to the conveying direction 106 cross section of the filter chamber 120 along the conveying direction 106 is moved to the ends of the painting booth 110 is swept by at least one of these cross sections (see Fig. 6 and 7 ).

For conditioning the air to be supplied to the application area 108 of the paint booth 110, two conditioning units 188 are provided in this embodiment, namely an air humidity conditioning unit 190 which is arranged in the collection channel 140 on the left with respect to the conveying direction 106, and an air temperature conditioning unit 192 which is in the direction of conveyance 106 arranged right collecting duct 140 is arranged (see Fig. 4 ).

Both the air humidity conditioning unit 190 and the air temperature conditioning unit 192 are arranged relative to the conveying direction 106 between two adjacent connecting channels 138, which connect the base bodies 134 to the collecting channels 140.

The humidity regulating unit 190 is arranged relative to the conveying direction 106 between a second connecting channel 138 in the conveying direction 106 and a third connecting channel 138 of the eight in the conveying direction 106 in succession and with respect to the conveying direction 106 on the left arranged connecting channels 138.

The air temperature conditioning unit 192 and the humidity control unit 190 are arranged mirror-symmetrically with respect to the longitudinal center plane 128 of the paint booth 110.

The air temperature conditioning unit 192 is thus arranged relative to the conveying direction 106 between a second connecting channel 138 in the conveying direction 106 and a third connecting channel 138 of the eight in the conveying direction 106 in succession and with respect to the conveying direction 106 on the right arranged connecting channels 138.

• Ein im Applikationsbereich 108 der Lackierkabine 110 geführter Luftstrom wird aufgrund der Lackiertätigkeit der Lackiereinrichtungen 116 mit Nasslack-Overspray-Partikeln verunreinigt.

The paint shop 100 described above works as follows (see in particular Fig. 7 ):

• A guided in the application area 108 of the paint booth 110 air flow is contaminated due to the painting of the painting 116 with wet paint overspray particles.

The contaminated air flow is led out of the paint booth 110 into the filter chamber 120, the cleaning device 118.

In the filter chamber 120, the air flow designated as the total air flow AB is split into a first partial air flow A and into a second partial air flow B.

The first partial air flow A flows into the filter devices 124 arranged with respect to the conveying direction 106 to the left of the longitudinal center plane 128 of the painting booth 110.

The second partial air flow B flows into the filter devices 124 arranged with respect to the conveying direction 106 to the right of the longitudinal center plane 128 of the painting booth 110.

The filter devices 124 of the cleaning device 118 clean the air streams A and B from the wet paint overspray particles, with the cleaned air from the interior spaces 126 of the filter devices 124 entering the base bodies 134.

The wet paint overspray particles and precoat particles infiltrated on the surface filters of the filter devices 124 are periodically cleaned of the surface filters and taken up in the receptacles 130.

Through the connecting channels 138, the purified air passes into the collecting channels 140th

The cleaned air collected in the collecting ducts 140 is guided counter to the conveying direction 106 to the ends 146 of the collecting ducts 140 facing the workpiece inlet side 144 of the painting booth 110.

Due to the arrangement of the humidity control unit 190 relative to the conveying direction 106 between the second in the conveying direction 106 and In the conveying direction 106, the third connecting channel 138 of the eight with respect to the conveying direction 106 left connection channels 138 is a Unterteilluftstrom A2, which by a first in the conveying direction 106 and the second 106 in the conveying direction of the connecting channel 138 of the eight with respect to the conveying direction 106 left connection channels 138th flows, not conditioned.

Only one Unterteililluftstrom A1, which in the conveying direction 106 third, one in the conveying direction fourth, one in the fifth direction, one in the sixth conveying direction, one seventh in the conveying direction 106 and an eighth in the conveying direction connecting channel 138 of the eight connecting channels 138 arranged on the left with respect to the conveying direction 106 flows into the collecting channel 140, is guided by the air humidity conditioning unit 190 and conditioned thereby by the same.

Due to the arrangement of the Lufttemperaturkonditioniereinheit 192 relative to the conveying direction 106 between the second in the conveying direction 106 and third in the conveying direction 106 connecting channel 138 of the eight with respect to the conveying direction 106 right arranged connecting channels 138 is a Unterteililluftstrom B2, which by a first in the conveying direction 106 and in the conveying direction 106 second connecting channel 138 of the eight with respect to the conveying direction 106 right arranged connecting channels 138 flows, not conditioned.

Only one Unterteililluftstrom B1, which from the third in the conveying direction 106, one in the conveying direction fourth, one fifth in the conveying direction 106, one sixth in the conveying direction 106, one seventh in the conveying direction and a seventh in the conveying direction connecting channel 138 of the Eight connecting channels 138 arranged on the right in relation to the conveying direction 106 flow into the collecting channel 140 is guided through the air temperature conditioning unit 192 and conditioned by the same.

The arrangement of the conditioning units 188 in the collecting channels 140 causes the Unterteililluftströme A1 and A2 and the Unterteililluftströme B1 and B2 downstream of the respective conditioning unit 188, that is downstream of the humidity conditioning unit 190 and downstream of the Lufttemperaturkonditioniereinheit 192, merged again to the partial air streams A and B respectively become.

At the workpiece inlet side 144 of the painting booth 110 facing ends 146 of the collecting channels 140, the partial air streams A and B are passed through the blower 148 in the return lines 150 and guided within the rectilinear return sections 154 in the upper part of the paint shop 100.

By means of the curved return sections 162, the partial air streams A and B guided in the return lines 150 are deflected and fed to the upper area 178 of the chamber 170 of the plenum 168.

In this upper area 178, a mixing of the differently conditioned partial air flows A and B to the total air flow AB takes place.

Subsequently, the thus mixed air through the arranged in the false ceiling 176 safety filter 182 in the lower portion 180 of the chamber 170 of the plenum 168 and from there through the filter cover 174 in the application area 108 of the paint booth 110 passed.

By means of the safety filters 182, impurities still present in the air stream are removed in order to avoid any supply of contamination to the application area 108 of the paint booth 110.

Both the safety filter 182 and the filter cover 174 further serve to equalize the air flow through the application area 108 of the paint booth 110 and the reduction of turbulence.

In this embodiment, according to the in Fig. 8 illustrated process scheme that the guided through the application area 108 of the paint booth 110 total air flow AB is first divided into the filter chamber 120 in the partial air flows A and B.

In the filter chamber 120 of the paint shop 100, approximately 18,000 m ^{3 of} air per hour are sucked into the filter devices 124 on both sides.

On both sides of the filter chamber 120, a cross-flow Q of 900 m ³ / h with a temperature of 34 ° C and 42% humidity is added by the air supply devices 129 each.

This transverse air flow Q can be supplied as circulating air via the barrier flaps 210 from the rectilinear return sections 154 or as supply air via the inlet flaps 196 from the supply air systems 194. It can also be provided that the cross-flow of air Q is mixed at partially open barrier flaps 210 and supply flaps 196 from circulating air and supply air.

At flow path branches 198 (which are realized in the described embodiment through the inlet openings of the filter devices 124), the partial air flows A and B are split into differently conditionable lower partial air flows A1, A2, B1 and B2.

At a speed of about 8 m / s, the divider air flow A1 of the partial air flow A is supplied to the humidity control unit 190.

The sub-unit air flow A1 is humidified in this embodiment by the humidity control unit 190.

The base air flow A2 is conducted past the humidity control unit 190 by means of a bypass line 208 and thus not conditioned. In the flow path of the Unterteililluftstroms A2, that is, in the bypass line 208, a valve designed as a bypass valve 200 may be provided.

With the bypass flap 200 it is possible to regulate and / or control which portion of the partial air flow A is conditioned by means of the humidity control unit 190.

Downstream of the humidity control unit 190, a flow path merging 202 is provided (which is realized in the described embodiment by the junctions of the two connecting channels 138 adjacent to the blower 148 in the collecting duct 140 on the left with respect to the conveying direction 106).

By means of the Strömungswegzusammenführung 202, the Unterteililluftströme A1 and A2 are brought together again to the partial air flow A.

Downstream of the flow path merger 202, a blower 148 is arranged, which drives the partial air flow A.

The blower fan 148 has an output of approximately 18.5 kW.

Downstream of the blower 148, an exhaust system 204 is arranged, wherein an exhaust air flow can be regulated by means of a designed as exhaust valve 206 valve.

In this embodiment, the discharged by means of the exhaust system 204 from the partial air flow A exhaust air flow is 900 m ³ / h.

At a speed of about 8 m / s, the divisional airflow B1 of the partial airflow B is supplied to the air temperature conditioning unit 192.

The divider air flow B1 is cooled by the air temperature conditioning unit 192 in this embodiment.

The divider air stream B2 is conducted past the air temperature conditioning unit 192 by means of a bypass line 208 and thus not conditioned. In the flow path of the Unterteililluftstroms B2, that is, in the bypass line 208, a valve designed as a bypass valve 200 may be provided.

With the bypass flap 200 it is possible to regulate and / or control which portion of the partial air flow B is conditioned by means of the air temperature conditioning unit 192.

Downstream of the air temperature conditioning unit 192, a flow path merger 202 is provided (which in the embodiment described is realized by the junctions of the two connecting channels 138 adjacent to the blower 148 in the right-hand collecting duct 140 with respect to the conveying direction 106).

By means of the Strömungswegzusammenführung 202, the Unterteililluftströme B1 and B2 are brought together again to the partial air flow B.

Downstream of the flow path assembly 202, a blower 148 is arranged, which drives the partial air flow B.

The blower fan 148 has an output of approximately 18.5 kW.

Downstream of the blower 148, an exhaust system 204 is arranged, wherein an exhaust air flow can be regulated by means of a designed as exhaust valve 206 valve.

In this embodiment, the discharged by means of the exhaust system 204 from the partial air flow B exhaust air flow is 900 m ³ / h.

The partial air streams A and B are combined in the upper region 178 of the chamber 170 of the plenum 168 to the total air flow AB.

The total air flow AB is then guided through the safety filter 182 arranged in the false ceiling 176 into the lower region 180 of the chamber 170 of the plenum 168 and from there through the filter cover 174 into the application region 108 of the paint booth 110.

The air is thus at least partially guided in a circulating air circuit, that is to say that at least part of the air removed from the application area 108 of the paint booth 110 is returned to the application area 108 of the paint booth 110 after cleaning and conditioning.

In the application region 108 of the paint booth 110, the air reaches a sinking speed of approximately 0.3 m / s with a total air flow AB of a total of 36,000 m ³ / h.

An in Fig. 9 illustrated second embodiment of a device for supplying air to an application area of a paint shop differs from that in the Fig. 1 to 8 shown first embodiment in that an extraction of the total air flow AB in the filter chamber 120 of the paint system 100 is only one side.

Downstream of the filter devices 124 takes place at a flow path branching 198, a division of the total air flow ABC into three partial air streams A, B and C.

Only the partial air flow B is conditioned by means of a humidity conditioning unit 190.

The partial air flow A is guided past the air humidity conditioning unit 190 by a bypass line 208 and combined at a flow path junction 202 with the air conditioned by the humidity conditioning unit 190 of the partial air flow B to the partial air flow AB.

The combined partial air flow AB is conditioned by means of the air temperature conditioning unit 192.

Downstream of the air temperature conditioning unit 192, finally, a combination of the thus conditioned air of the partial air flow AB with the non-conditioned partial air flow C to the total air flow ABC takes place at a flow path merger 202.

The total air flow ABC is supplied by means of the blower 148 to the plenum 168.

An in Fig. 10 illustrated third embodiment of a device for supplying air to an application area of a paint shop differs from the in Fig. 9 illustrated second embodiment in that the humidity control unit 190 and the Lufttemperaturkonditioniereinheit 192 are arranged interchanged with each other.

Thus, first of all, the partial air flow B is conditioned by means of the air temperature conditioning unit 192. After a merger of the so - called conditioned partial air flow B with the unconditioned partial air flow A is carried out a conditioning of the partial air flow AB by means of the humidity control unit 190th

Incidentally, the in Fig. 10 illustrated third embodiment of the device for supplying air to an application area of a paint shop in terms of design and function with the in Fig. 9 illustrated second embodiment, to the above description in this respect reference is made.

An in Fig. 11 illustrated fourth embodiment of a device for supplying air to an application area of a paint shop differs from the in Fig. 10 illustrated third embodiment in that the blower 148 is disposed not downstream of the flow path assembly 202, but upstream of the flow path branch 198, wherein at the Strömungswegzwezweigung 198 three partial air streams A, B and C branch off. The partial air flow A is conditioned by the humidity control unit 190. The partial airflow B is conditioned by means of the air temperature conditioning unit 192. The partial air flow C is not conditioned.

At the flow path junction 202, in this embodiment, all three partial air streams A, B and C are combined again to the total air flow ABC.

Incidentally, the in Fig. 11 illustrated fourth embodiment of the device for supplying air to an application area of a paint shop in terms of design and function with the in Fig. 10 illustrated third embodiment, the above description of which reference is made.

An in Fig. 12 illustrated fifth embodiment of a device for supplying air to an application area of a paint shop differs from the in Fig. 11 4, in that the fan 148 is disposed not upstream of the flow path branch 198 but downstream of the flow path merger 202.

Since the blower 148 always heats an airflow passing through it, an arrangement of the blower 148 downstream of a cooling device offers the advantage that the air flow is dehumidified more. On the other hand, if the blower 148 is arranged upstream of a cooling device, the air flow is first heated and dehumidification is thus hindered, since the air heated by the blower 148 can absorb more moisture.

Incidentally, the in Fig. 12 illustrated fifth embodiment of the device for supplying air to an application area of a paint shop in terms of design and function with the in Fig. 11 4, the above description of which is incorporated herein by reference.

The division of a total air flow into partial air flows and the subsequent different conditioning of the partial air flows enable a particularly energy-efficient conditioning and supply of the air to be supplied to an application area of a paint shop.

Claims (11)

1. Device for supplying air to an application region (108) of a paint shop (100), comprising a recirculating air circuit and at least one conditioning unit (188) that conditions at least some of the air carried in the recirculating air circuit,
   wherein the device comprises at least one air-humidity conditioning unit (190),
   characterized in
   that the device comprises a plurality of different flow paths for at least two partial air streams (A, B), wherein the at least two partial air streams (A, B) can be conditioned differently in the different flow paths, can be brought together and mixed before entry into the application region (108) and can also be supplied subsequently to the application region (108) as a mixed total air stream (AB).
2. Device according to claim 1, characterized in that the device comprises at least one air-temperature conditioning unit (192) for influencing the temperature of at least one partial air stream (A, B).
3. Device according to claim 2, characterized in that at least two partial air streams (A, B) can be conditioned by means of at least one conditioning unit (188), wherein at least one of the air streams (A, B) can be humidified.
4. Device according to one of claims 1 to 3, characterized in that the device comprises at least one bypass line (208), by means of which at least one partial air stream (A, B) can be conveyed past at least one conditioning unit (188) without being conditioned thereby.
5. Device according to one of claims 1 to 4, characterized in that the device comprises at least one flow path branch (198) and at least one blower (148) for driving at least one partial air stream (A, B) carried in the recirculating air circuit, wherein the blower (148) is disposed upstream of the flow path branch (198).
6. Device according to one of claims 1 to 5, characterized in that the device comprises an air intake system (194), for supplying intake air to the recirculating air circuit, and an air discharge system (204) for removing discharge air from the recirculating air circuit.
7. Method of conditioning air to be supplied to an application region (108) of a paint shop (100), wherein at least some of the air is carried in a recirculating air circuit, wherein a total air stream (AB) to be supplied to the application region (108) is split for conditioning into at least two different partial air streams (A, B) that are conditioned differently, wherein at least some of at least one partial air stream (A, B) is conditioned by means of at least one air-humidity conditioning unit (190), characterized in that the at least two partial air streams (A, B) are brought together and mixed before entry into the application region (108) of the paint shop (100) and subsequently supplied to the application region (108) as a mixed total air stream (A, B).
8. Method according to claim 7, characterized in that at least some of at least one partial air stream (A, B) is conditioned by means of at least one air-temperature conditioning unit (192).
9. Method according to one of claims 7 or 8, characterized in that the ratio of air removed from the application region (108) of the paint shop (100) to additionally supplied air is at least 4:1.
10. Method according to one of claims 7 to 9 characterized in that by means of at least one bypass line (208), at least one partial air stream (A, B) is conveyed past at least one conditioning unit (188) without being conditioned thereby.
11. Use of a device according to one of claims 1 to 6 for implementing a method according to one of claims 7 to 10.

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