Paint gas supply system, installation for painting and method for operating a system for painting

Abstract

The invention relates to a paint gas supply system (101) comprising a distributor (102), wherein the distributor (102) includes a connector (103) and a plug unit (104), the connector (103) comprising a first neck (105), a second neck (106), and a third neck (107), and the plug unit (104) comprising a head (108) to which the plug unit (104) is connected to a free end (105a) of the first neck (105). The plug unit (104) and the connector (103) are connected such that an interior (109) of the connector (103) is closed and the interior (103) is sealed by the head (108) of the plug unit (104) in such a way that a pressurized gas (DG) at a pressure of up to 20 bar can flow through it. In this case, the plug unit (104) includes a heating probe (110) and the free end (106a) of the second neck (106) is designed as a hose connection (111).

Description

[0001] The invention relates to a painting air supply system, a painting system and a method for operating a painting system.

[0002] It is known from the prior art that even for painting processes, especially solvent-based painting processes and water-based paints, the results can be improved if moisture-enriched compressed air is used for the painting process. In particular, the use of moisture-enriched, especially saturated compressed air at a relative humidity of, for example, over 40%, can lead to significant improvements in the painting properties and the painting results.

[0003] A disadvantage of using conventional painting air supply systems is that liquid separators in the compressed air or compressed gas stream usually remove a significant portion of the liquid component of the compressed gas relevant to the painting process in order to prevent unwanted accumulation of liquid. The as yet unpublished German patent application 10 2018 129 038.1 has already proposed an improvement to known painting air supply systems to prevent such unwanted accumulation of liquid in the compressed gas stream. Further practical experience has shown that in certain cases, after periods of non-operation, increased condensate has formed, accumulating particularly near the spray gun. In such cases, the spray gun additionally releases the unwanted liquid when a painting process starts.This is referred to as spitting of the paint spray gun, which severely impairs the quality of the paint layer being produced.

[0004] In principle, the problems described also occur, albeit to a lesser but still relevant extent, when using compressed gases other than painting gases.

[0005] In this respect, the invention has the object of proposing a painting air supply system, a painting system and a method for operating a painting system, by means of which practical suitability with regard to an optimal painting result is further improved.

[0006] This object is achieved on the basis of the features of the preamble of claim 1 or 17 or 20 or 23 or 25 or 30 or 32 by the characterizing features of claim 1 or 17 or 20 or 23 or 25 or 30 or 32. Advantageous and expedient developments are specified in the respective subclaims.

[0007] The painting gas supply system according to the invention comprises a distributor, wherein the distributor comprises a connector and a plug unit, wherein the connecting piece comprises a first neck, a second neck and a third neck, wherein the plug unit comprises a head with which the plug unit is connected, in particular detachably, to a free end of the first neck, wherein the plug unit and the connecting piece are connected and in particular designed as a single piece in such a way that an interior of the connecting piece is closed and that the interior is sealed by the head of the plug unit in such a way that a compressed gas with a pressure of up to 20 bar can flow through it, wherein the plug unit comprises a heating probe and wherein the free end of the second neck is designed as a hose connection. Such a painting gas supply system can be easily integrated into a new system or retrofitted to an existing system, so that the heating probe can prevent the formation of condensation in front of a paint spray gun, since the heating probe can keep the ability of the compressed gas to absorb moisture constant or increase it.

[0008] It is also provided that the painting gas supply system comprises a first pressure hose, which is designed as a conductive pressure hose, in particular made of rubber, a backflow preventer built into the first pressure hose or connected to the first pressure hose, and a pressure switch, wherein the pressure switch detects a gas pressure present in the first pressure hose. By means of the pressure switch, the heating probe and any present ionization device can be switched off in the event of a falling pressure in order to prevent an explosion or fire. If the pressure falls below a limit value of 0.5 bar, for example, the painting gas supply system is also switched off. The backflow preventer prevents a potentially explosive gas from the ambient air from flowing into the first pressure hose, thus implementing explosion protection.This effectively prevents gas from the environment from flowing into the spray gun. In the event that the pressure switch switches off the heating probe, any ionization device present, and the spray gas supply system or a compressed air supply, the next step is to manually flush the spray gas supply system with compressed gas or an inert purge gas, such as N2. The supplied compressed gas or the supplied inert purge gas flows out via the spray gun or an outlet valve, the outlet valve being located near the end of the first pressure hose or near the spray gun. After flushing the spray gas supply system, a manual reset is performed by pressing a reset switch included in the spray gas supply system.

[0009] It is also intended that the painting gas supply system additionally includes a regulator for purge air. Using the purge air regulator, it is possible to automatically purge the painting gas supply system with compressed gas after a pressure drop. If a purge air regulator is installed, the purge is intended to run automatically. After the heating probe, any existing ionization device and the painting gas supply system or a supply of compressed air have been switched off, the regulator supplies compressed air again and controls that this air flows out via the paint spray gun or via an outlet valve. In this case, the purge air regulator can also control that the heating probe, any existing ionization device and the painting gas supply system or the supply of compressed gas are reactivated after purging. A reset is carried out accordingly by the purge air regulator.

[0010] Furthermore, it is provided that the heating probe, the ionization device (if present) and the painting gas supply system or the supply of compressed gas are reactivated by manual reset, e.g. by pressing a reset switch after rinsing.

[0011] Furthermore, it is provided that the painting gas supply system comprises a second pressure hose or a second pressure line, and that a free end of the third neck is designed as a connection to which a compressed gas source can be connected directly or via the second pressure hose or the second pressure line. This allows the distributor to be integrated into various system configurations.

[0012] It is also provided to design the heating probe as a flexible element, wherein the heating probe is designed in particular as an electrical heating probe, preferably as a heating cable, or wherein the heating probe is designed in particular as a liquid-heated heating probe, preferably as a heating hose, or wherein the heating probe is designed in particular as a gas-heated heating probe, preferably as a heating line. This makes it possible to insert the heating probe deep into the first pressure hose, which leads to the paint spray gun, so that the temperature in the first pressure hose can be regulated with equal effectiveness over any section of its length. Alternatively, it is also provided to guide the heating probe along a pressure hose into a space surrounded by a casing.Such heating probes can be operated using different energy sources, so that the distributor can be easily designed for the preferred energy source, so that locally available energy sources can be used without the need to convert the energy form.

[0013] The spray gas supply system also includes a manually operated push button for resetting the pressure switch or purge controller after an unacceptable pressure drop is detected. This prevents the spray gas supply system from automatically restarting.

[0014] It can also be provided that the painting gas supply system comprises at least one pressure switch, wherein the at least one pressure switch detects a gas pressure present in the first pressure hose. In particular, it is provided that the distributor comprises an extension connected to a free end of the third neck, and the pressure switch is mounted on the extension. If an extension is used, this allows the connector to be retrofitted with a pressure switch without the need to modify the connector.

[0015] The spray gas supply system can also be provided with a safety pressure relief valve, which creates a connection between the interior of the distributor and the surrounding area. This allows the spray gas supply system to easily incorporate an additional safety function into the system without requiring additional installation effort.

[0016] Furthermore, the heating probe is designed to extend at least half its length beyond a free end of the second neck when the plug unit is connected to the connector. This ensures that the heating probe can transfer its heat output to the compressed gas not only within the connector, but also outside the connector.

[0017] It can be provided that the connecting piece of the distributor is designed in different ways, wherein it can either be designed such that a longitudinal axis of the first neck and a longitudinal axis of the second neck form a common longitudinal axis and a longitudinal axis of the third neck is arranged so as to protrude, in particular at an angle, preferably at right angles to the common longitudinal axis of the first and second necks or can be designed such that a longitudinal axis of the first neck and a longitudinal axis of the third neck form a common longitudinal axis and a longitudinal axis of the second neck is arranged so as to protrude, in particular at an angle, preferably at right angles to the common longitudinal axis of the first and third necks or can be designed such that a longitudinal axis of the first neck, a longitudinal axis of the second neck and a longitudinal axis of the third neck are arranged in a Y-like manner to one another.The first design offers the advantage that the heating probe can be inserted straight through the connector. The second design offers the advantage that the plug unit and the second pressure hose enter the connector opposite each other. The third design offers the advantage that the connector is designed as a highly resilient component due to its shape.

[0018] The connector can also be designed as a T-piece, with one of the necks arranged with its longitudinal axis perpendicular to a common longitudinal axis of the other two necks. This makes the connector a component whose external shape already indicates its functional logic, thus facilitating fault analysis in the event of malfunctions.

[0019] Furthermore, it can also be provided that the heating probe is integrated into a wall of the connection piece and / or that the heating probe is integrated into a casing of the first pressure hose and in particular is integrated all the way around or surrounds a casing of the first pressure hose and in particular preferably runs spirally around the first pressure hose and forms a heating sleeve or in particular runs along a longitudinal extent of the first pressure hose, that it is also provided in particular that the heating probe comprises a heating line or a plurality of heating lines which run along a longitudinal axis of the first pressure hose and that the heating probe comprises in particular an individual heating probe or at least two individual heating probes which are arranged along the longitudinal axis, wherein it is provided in particular that the individual heating probe or individual heating probes is or are integrated into the casing.are, wherein it is also provided in particular that the first pressure hose is designed as a so-called multi-lumen hose or multi-chamber hose, which accommodates the compressed air lines and the heating probes or individual heating probes in a single hose or in several individual hoses. The first variant has the advantage that it is not necessary for the first pressure hose to be adapted to the heating probe, so that this variant is particularly suitable for retrofitting existing systems. The second variant has the advantage that the flow path of the first pressure hose is not restricted by the heating probe, so that the compressed gas can flow unhindered through the first pressure hose despite the heating probe. Furthermore, the second variant has the advantage that the heating probe also forms a type of insulation, so that a temperature drop is slowed down when the heating probe is switched off.The spiral-shaped heating probe largely prevents stiffening of the first pressure hose, thus maintaining its desired flexibility. A combination of the first and second variants creates a particularly long section of length over which the compressed gas is heated by the heating probe, allowing it to act particularly effectively on the compressed gas to prevent the formation of condensate.

[0020] It is also proposed to design the heating probe as an electric heater, with the electric heater being arranged in an interior space of the first pressure hose, and the first pressure hose being designed as a conductive pressure hose, in particular made of rubber, such that a pressurized enclosure according to ATEX is realized, corresponding to a protection level "p." This makes it possible to operate the painting gas supply system in a potentially explosive environment with simple measures.

[0021] Finally, the painting gas supply system can be designed either so that, if only the first pressure hose of the painting gas supply system is operated in a potentially explosive environment, the first pressure hose is designed to be ignition-protected by pressurized encapsulation and is made of a conductive material on the outside, or so that the entire painting gas supply system is operated in a potentially explosive environment, all components of the painting gas supply system are designed to be ignition-protected by pressurized encapsulation and / or pressure-resistant encapsulation, and the first pressure hose is made of a conductive material on the outside. This makes it possible to design a painting gas supply system with little effort in such a way that it meets the requirements for explosion protection and can therefore be operated in potentially explosive environments, either in whole or in part.

[0022] In the painting system according to the invention, which comprises a compressed gas source, which in particular provides moist air or ionized air, a painting gas supply system, a paint gun for spraying a paint and a drainage station, it is provided that a first pressure hose of the painting gas supply system can be connected during operation of the system either to the paint gun or to the drainage station or by means of a T-piece, in particular with the interposition of a further pressure hose to the paint gun and / or to the drainage station and / or that it can also be provided in particular,that, preferably when using moist air as the compressed gas, the first pressure hose is connected to a respiratory mask via the T-piece, in particular with the interposition of a breathing air treatment device, and / or that the first pressure hose is connected to one or more items of clothing that can be cooled by compressed air via the T-piece, with the interposition of a compressed air treatment device. This makes it possible to effectively drain the pressure hose in a simple manner when no painting work is being carried out. Furthermore, it is also possible, in particular, to provide breathing air to supply a respiratory mask via the pressure hose. It can be provided,that the breathing air is conditioned by humidifying the branched compressed air and / or that the breathing air is conditioned by dehumidifying the branched compressed air and / or that the breathing air is conditioned by heating the branched air and / or that the breathing air is conditioned by cooling the branched air. A breathing air supply is particularly advantageous when using moist compressed air, as breathing air treatment is required only to a limited extent. This also makes it possible, in particular, to use the branched compressed air to cool clothing. This reduces the amount of piping required to provide breathing air or cooling air for clothing.

[0023] Furthermore, it can also be provided that the painting gas supply system of the system is designed according to at least one of claims 1 to 13 and comprises the distributor and the first pressure hose. This results in the advantages cited in the respective claims in combination with the above-mentioned drainage function. This means that the formation of condensate can be particularly effectively prevented and that the energy consumption of the heating probe can also be reduced, since the condensate can be effectively drained via the drainage station when no painting work is being carried out and thus does not need to be maintained at a constant temperature or kept in a gaseous state by increasing the temperature.

[0024] It is also provided to supply compressed gas in the form of moist air with a relative humidity of over 40% via the first pressure hose, or compressed gas in the form of ionized air or in the form of N2 or compressed gas enriched with N2 via the first pressure hose, and in particular to provide that the system and in particular the painting gas supply system or in particular the distributor comprises a switching device which is selectively switched to an inflow of moist air or to an inflow of ionized compressed gas. This allows a wide variety of painting tasks to be carried out with optimal results. A manual change of the compressed gas can also be provided by connecting the painting gas supply system to a different compressed gas source.The ability to automatically switch between different painting processes, each requiring humid air, ionized air, another form of compressed air, or nitrogen, with minimal effort and time, makes it possible to quickly and easily switch between them. Furthermore, it allows you to select a desired compressed gas for blowing off components to be painted.

[0025] The system can also provide for the distributor either arranged between the compressed gas source and the first pressure hose and directly connected to the compressed gas source or that the distributor is arranged between a second pressure hose or pressure line coming from the compressed gas source and the first pressure hose, wherein it is particularly provided that the painting gas supply device comprises a switching valve which is connected to the distributor and to which at least two compressed gas sources are connected, which supply different Provide compressed gases.

[0026] This allows different types of systems to be upgraded with the painting gas supply system, as it can be flexibly connected to an existing compressed gas source via the second pressure hose or compressed gases can be mixed.

[0027] Finally, it can also be provided that the heating probe extends from the connecting piece over at least 50%, in particular 75%, and preferably at least 90% of the length of the first pressure hose. This allows the compressed gas flowing or located in the first pressure hose to be optimally maintained or heated at a constant temperature.

[0028] In the method according to the invention for operating a painting system, in which the system is designed in particular according to at least one of the preceding claims 13 to 17, it is provided that that before the start of a first painting process, the paint spray gun is coupled to the first, in particular drained, pressure hose, that the painting process is carried out, that after the end of the first painting process and at the start of a painting break, the paint spray gun is uncoupled from the first pressure hose and can be connected to the drainage station, that while the first pressure hose is connected to the drainage station, condensate forming in the first pressure hose can be drained from the first pressure hose via the drainage station, that after the end of the painting break and before the start of a second painting process, the first pressure hose is uncoupled from the drainage station and the paint spray gun is reconnected to the first pressure hose.

[0029] This process effectively and cost-effectively prevents the accumulation of condensate during periods of inactivity in the painting process. In particular, this process can also be applied to systems that are not equipped with a heating probe to prevent the formation of condensate. To apply the process to such systems, only the purchase of a drainage station is required. This process also allows for the proper application of paints used in the aerospace industry, which require compliance with a specific process window regarding humidity. With the process according to the invention, as an alternative to coupling to the drainage station, manual or automatic drainage can be carried out via the coupling and, in particular, via the spray gun.

[0030] As a supplement to the method for operating a painting system, it is also provided that, before the painting process is carried out, metal parts or plastic parts to be painted are statically discharged by blowing air supplied via the first pressure hose in preparation for the painting process. For this purpose, compressed air, warm compressed air, or ionized compressed air is supplied, and it is particularly provided that ionization is carried out by an ionization device that is connected to the first pressure hose via a distributor. This makes it possible to optimize the painting process with no or minimal plant engineering effort. It is also provided that the painting process is carried out using ionized compressed gas.

[0031] In the context of the invention, a compressed gas is understood in the broader sense to mean both compressed air and compressed gases of other types, in particular nitrogen or compressed gas mixtures, which can in particular also be provided with high moisture contents and are used in the painting process.

[0032] The term "type of protection" is a term used in explosion protection and refers to various design principles in this area. The basic idea behind each type of protection is to minimize the risk of the simultaneous presence of an explosive atmosphere and ignition sources.

[0033] The pressurized enclosure (Ex-p) type of protection allows the operation of non-explosion-proof devices in potentially explosive atmospheres. The underlying principle of the pressurized enclosure type of protection is to keep explosive gas mixtures away from the non-explosion-proof devices used. For the purposes of the invention, the "pressurized enclosure" type of protection – abbreviated to Ex-p – refers to ignition protection based on the operation of non-explosion-proof devices in a pressurized enclosure. In this case, the enclosure is protected from the penetration of potentially explosive atmospheres in the vicinity of the enclosure by a permanent overpressure within the enclosure. Purging the device before commissioning and / or after a malfunction removes any flammable gas / air mixture present inside the enclosure. This can be done manually or automatically.

[0034] For the purposes of the invention, the type of protection "flameproof enclosure" – abbreviated to Ex – refers to ignition protection based on the containment of a potentially occurring explosion within an enclosure. Accordingly, an enclosure is designed to be explosion-pressure-resistant and has flameproof gaps at all enclosure openings. Furthermore, it is ensured that the surface temperature of the enclosure remains below the ignition temperature of the surrounding explosive atmosphere, even in the event of an expected fault. The requirements for equipment that meets this type of protection are described in the EN 60079-1 standard.

[0035] For the purposes of the invention, a dissipative object is understood to be an object that has a higher electrical resistance than conductive objects, but does not become dangerously charged when in contact with ground and is not exposed to highly charge-generating processes. In particular, this can be a dissipative object with a maximum resistance of 1 MΩ.ATEX conformity in the sense of the invention means that the painting gas supply system with its distributor and its connected pressure hose leading to a paint spray gun, as well as its heating probe, its pressure switch and its backflow preventer connected to the pressure hose and its conductive pressure hose, as well as optionally also its regulator for purge air and / or manual purging, is designed in such a way that the ATEX Directive 94 / 9 / EC (Atex 95) or a comparable directive is fulfilled and / or that device protection by pressurised encapsulation according to at least one of the protection levels "pyb" and / or "pxb" and / or "pzc" is fulfilled.In the event of danger, which is detected by a drop in pressure in the first pressure hose, manual or automated purging of the painting gas supply system is possible after switching off the heating probe and any ionization device that may be present.

[0036] Further details of the invention are described in the drawings using schematically illustrated embodiments. Figures 1 and 2 show various embodiments of the invention described above. This shows:

[0037] Figure 1: a schematic view of a first embodiment of a painting gas supply system; Figure 2: a schematic view of a second embodiment of a painting gas supply system; Figure 3: a schematic view of a third embodiment of a painting gas supply system; Figure 4: a schematic side view of a first painting system; and Figure 5: a schematic side view of a second painting system.

[0038] In the Figure 1A first embodiment of a painting gas supply system 101 is shown in a schematic view. This comprises a distributor to which a first embodiment of a first pressure hose 151 is connected. The distributor 102 comprises a connector 103 and a plug unit 104. The connector 103 comprises a first neck 105, a second neck 106, and a third neck 107. The plug unit 104 comprises a head 108, with which the plug unit 104 is detachably connected to a free end 105a of the first neck 105.

[0039] The plug unit 104 and the connecting piece 103 are connected in such a way that an interior space 109 of the connecting piece 103 is closed, and the interior space 109 is sealed by the head 108 of the plug unit 104 in such a way that a compressed gas DG at a pressure of up to 20 bar can flow through it. The plug unit 104 comprises a heating probe 110. A free end 106a of the second neck 106 is designed as a hose connection 111, to which the first pressure hose 151 leading to a paint spray gun (not shown) is connected. According to one embodiment, the plug unit 104 and the connecting piece 103 are formed as a single piece, as a component made of one material.

[0040] A free end 107a of the third neck 107 is designed as a connector 112, to which a compressed gas source (not shown) is connected via a second pressure hose 161. Alternatively, the distributor 102 can also be connected directly to the compressed gas source. The heating probe 110 is designed as a flexible element that adapts to the path of the first pressure hose 151.

[0041] The heating probe 110 is designed as an electrical heating probe 113 in the form of a heating cable 114. A dotted line in the Figure 1a wall 171 is indicated which separates a potentially explosive environment room 172 located to the right of the wall 171 from a non-explosive environment 173 located to the left of the wall 171. The first pressure hose 151 and the heating probe 110 running therein are guided through the wall 171, so that the distributor 102 is arranged in the non-explosive environment 172 and can thus be designed in a technically simpler and therefore more cost-effective manner. In front of the above-mentioned, not shown, paint spray gun, a backflow prevention device 180 is arranged at an end 151b of the pressure hose 151 opposite the hose connection 111. This prevents, in particular, even when the first pressure hose 151 is depressurized or under low pressure, an undesired inflow of potentially explosive ambient air, e.g. via the paint spray gun.This backflow preventer 180 also prevents compressed gas DG from flowing back against a flow direction x. Furthermore, the first pressure hose 151 is designed to be conductive thanks to a rubber coating. Alternatively, the rubber hose can also be designed as a solid rubber hose. The distributor 101 also includes a regulator 181 for purge air.

[0042] The painting gas supply system 101 comprises an extension 115, which is connected to the free end 107a of the third neck 107 of the distributor 102 and, in the present embodiment, is formed by the second pressure hose 161. The painting gas supply system 101 further comprises a pressure switch 116, which is mounted on the extension 115. Alternatively, the pressure switch can also be mounted in other areas of the painting gas supply system. The pressure switch 116 detects a gas pressure present in the pressure hose 151 via an interior space 117 of the distributor 102. The aforementioned regulator 181 enables automatic purging with compressed gas DG, for example, when the pressure switch 116 detects a pressure of, for example, less than 0.5 bar and has caused the painting gas supply system 101 to be shut down.Alternatively, instead of the regulator 181 and the pressure switch 116, only one pressure switch may be present, in which case flushing is carried out manually.

[0043] The painting gas supply system 101 comprises a safety pressure relief valve 118, wherein the safety pressure relief valve 118 establishes a connection between the interior 117 of the distributor 102 and an environment U.

[0044] The painting gas supply system 101 also includes a pressure regulator 119, which is connected to the extension 115. Alternatively, it is also possible to connect the pressure regulator to the third neck.

[0045] The heating probe 110 extends, based on its entire length L110 in the installed state, with more than half its length HL110 beyond the free end 106a of the second neck 106 into the pressure hose 151.

[0046] The connecting piece 103 is designed such that a longitudinal axis LA105 of the first neck 105 and a longitudinal axis LA106 of the second neck 106 form a common longitudinal axis A156 and a longitudinal axis LA107 of the third neck 107 is arranged at right angles to the common longitudinal axis A156 of the first and second necks 105, 106.

[0047] Accordingly, the connecting piece 103 is designed as a T-piece, in which the third neck 107 is arranged with its longitudinal axis LA107 at right angles to the common longitudinal axis LA156 of the other two necks 105, 106.

[0048] In the Figure 2 A second embodiment of a painting gas supply system 201 is shown in a schematic view. Here, a distributor 202 is connected to a second embodiment of a first pressure hose 251. For this second embodiment, please refer to the description of the Figure 1 The corresponding Figure 1 The reference symbols given above are replaced by the reference symbols of the Figure 2 In contrast to the Figure 1 In the embodiment shown, a heating probe 210 is designed as a gas-heated heating probe 213 in the form of a heating cable 214 and is constructed in such a way that Directive 94 / 9 / EC (Atex 95) is met, thus allowing the distributor 202 to be installed in a potentially explosive atmosphere 272. Accordingly, a pressure switch 216 is also installed in such a way that Directive 94 / 9 / EC (Atex 95) is met.

[0049] According to one embodiment variant, it is provided that the plug unit 204 and the connecting piece 203 are formed as a single part, as a component made of one material.

[0050] A backflow preventer 280 is arranged in front of the above-mentioned, not-shown paint spray gun at an end 151b of the pressure hose 251 opposite the hose connection 211. This prevents the inflow of ambient air in a pressureless or low-pressure state. This backflow preventer 280 also prevents compressed gas DG from flowing back against a flow direction x. The distributor 201 also includes a regulator 281 for purge air. If the pressure is too low, the regulator 281 receives a signal from the pressure switch 216 and then ensures automatic purging by a purging device. This ensures ATEX compliance.

[0051] In the Figure 3A third embodiment of a painting gas supply system 301 is shown in a schematic view, wherein a distributor 302 is connected to a third embodiment of a first pressure hose 351. For this third embodiment, reference is made to the description of the Figure 1 The corresponding Figure 1 The reference symbols given above are replaced by the reference symbols of the Figure 3 In contrast to the Figure 1A heating probe 310 is designed as a liquid-heated heating probe 313 in the form of a heating hose 314. Furthermore, a longitudinal axis L305 of a first neck 305 and a longitudinal axis L307 of a third neck 307 form a common longitudinal axis LA357, and a longitudinal axis L306 of the second neck 306 is arranged at right angles to the common longitudinal axis LA357 of the first and third necks 305, 307. The aforementioned heating probe 310 is integrated into a casing M351 of the first pressure hose 351 and runs therein along its longitudinal extent. Alternatively, it is also provided that the heating probe runs spirally circumferentially in the direction of the longitudinal extent of the first pressure hose. In both embodiments, it can also be provided that the heating probe runs within the casing in an interior space of the first pressure hose.

[0052] According to one embodiment variant, it is provided that the plug unit 304 and the connecting piece 303 are formed in one piece, as a component made of one material.

[0053] A backflow preventer 380 is arranged in front of the above-mentioned, not-shown paint spray gun at an end 351b of the pressure hose 351 opposite the hose connection 311. This prevents ambient air from flowing in, e.g., via the paint spray gun, in a pressureless or low-pressure state. This backflow preventer 380 also prevents compressed gas DG from flowing back against a flow direction x. The distributor 301 also includes a regulator 381 for purge air. If the pressure is too low, the regulator 381 receives a signal from the pressure switch 316 and then ensures automatic purging by a purging device. This ensures ATEX compliance.

[0054] In the Figure 41 shows a schematic side view of a first painting system 1.1. The first system 1.1 comprises a compressed gas source 2 for compressed gas 3. The compressed gas 3 is moist compressed gas with a relative humidity of over 40%. The system 1.1 comprises a first painting gas supply system LZ1, which comprises a distributor 7 and a first pressure hose 4 and which can be designed in detail according to one of the previously described painting gas supply systems. The system 1.1 also comprises a paint spray gun 5 for spraying a paint and, as shown, can comprise a drainage station 6 for draining the pressure hose 4. During operation of the system 1.1, the pressure hose 4 is connected either to the paint spray gun 5 or to the drainage station 6.

[0055] If necessary, the pressure hose 4 can be manually drained by first blowing compressed air 3 through the paint gun 5 without supplying paint or varnish before starting a painting process. The paint gun 5 is aligned in such a way that the air is blown past a component (not shown) to be painted.

[0056] Optionally, the pressure hose 4 can also be connected to a breathing mask 23 via a T-piece. This can be done with the interposition of a breathing air treatment device 22.

[0057] The distributor 7 is arranged between the compressed gas source 2 and the pressure hose 4 and is thus directly connected to the pressure hose 4. Alternatively, the distributor 7 can be connected to the compressed gas source 2 either via a second pressure hose (not shown) or directly to the compressed gas source.

[0058] Furthermore, the distributor 7 comprises a connecting piece 8 and a heating probe 9, wherein the heating probe 9 extends from the connecting piece 8 over a length L4 of the first pressure hose 4.

[0059] The first pressure hose 4 is connected at a first end 4a to the compressed gas source 2 via the distributor 7, and at a second end 4b, optionally to the paint spray gun 5 or the drainage station 6. According to a variant not shown, the pressure hose can also be connected at its second end to the paint spray gun and the drainage station via a T-piece. For this purpose, the first pressure hose 4 comprises a hose coupling K4b at its second end 4b, and the paint spray gun 5 comprises a gun coupling K5 adapted to the hose coupling K4b, and the drainage station 6 comprises a coupling K6 adapted to the hose coupling K4b. The drainage station 6 has a so-called "bleeder function," by means of which a continuous gas flow and thus a continuous drainage of the first pressure hose 4 can be realized when the painting function is inactive.The heating probe 9 encircles the pressure hose 4 in a spiral-like manner and forms a hose heater. This heating probe 9 can also be used in accordance with the descriptions of the . Figures 1 to 3 as an internal heating probe 9 running in the pressure hose 4 or as a heating probe 9 embedded in a jacket of the pressure hose 4 not further indicated in the schematic representation. Heating can be effected electrically, with heating gas, or with hot water by means of the heating probe 9. The heating probe is ATEX compliant. For detailed designs of the distributor and its heating probe, please refer to the description of the Figures 1 to 3 The information in the Figure 4 The first system 1.1 shown can be combined with any painting gas supply system described in the description of the figures or resulting from the claims.

[0060] The first system 1.1 comprises a backflow preventer 20. This is arranged in an area of ​​the second end 4b of the first pressure hose 4. This backflow preventer 20 prevents compressed gas DG from flowing back into the pressure hose 4 against a flow direction x. The first system 1.1 further comprises a pressure switch 16, by means of which a pressure in an interior of the pressure hose 4 is monitored. Furthermore, the first painting air supply system LZ1 of the first system 1.1 can comprise a regulator 21 for purge air, wherein the regulator 21 receives a signal from the pressure switch 16 when the pressure is too low and then ensures automatic purging by a purging device. The components of the first system 1.1 are ATEX-compliant.

[0061] In the Figure 5a schematic side view of a second painting system 1.2 is shown. The second system 1.2 comprises a compressed gas source 2 for compressed gas 3. The compressed gas 3 is either ionized compressed gas, in particular ionized compressed air or ionized nitrogen or ionized compressed air enriched with nitrogen or ionized carbon dioxide or a non-ionized compressed gas. The second system 1.2 comprises a second painting gas supply system LZ2, which comprises a distributor 7 and a first pressure hose 4 and which can be designed in detail, at least in part, according to one of the previously described painting gas supply systems. Furthermore, the second system 1.2 comprises a paint spray gun 5 for spraying a paint. The pressure hose 4 is connected to the paint spray gun 5 during operation of the second system 1.2.Optionally, the pressure hose 4 can also be connected to a breathing mask 23 via a T-piece. This can be done by interposing a breathing air treatment device 22.

[0062] If necessary, the pressure hose 4 can be manually drained by first blowing compressed air 3 through the paint gun 5 without supplying paint or varnish before starting a painting process. The paint gun 5 is aligned in such a way that the air is blown past a component (not shown) to be painted.

[0063] The distributor 7 is arranged between the compressed gas source 2 and the pressure hose 4 and is thus directly connected to the pressure hose 4. Alternatively, the distributor 7 can be connected to the compressed gas source 2 either via a second pressure hose (not shown) or directly to the compressed gas source.

[0064] Furthermore, the distributor 7 comprises a connecting piece 8 and a heating probe 9, wherein the heating probe 9 extends from the connecting piece 8 over a length L4 of the first pressure hose 4.

[0065] The first pressure hose 4 is connected with a first end 4a via the distributor 7 to the compressed gas source 2 and with a second end 4b detachably connected to the paint gun 5. For this purpose, the first pressure hose 4 comprises a hose coupling K4b at its second end 4b, and for this purpose, the paint gun 5 comprises a gun coupling K5 adapted to the hose coupling K4b. The heating probe 9 is designed as an electrical heating probe and runs along the longitudinal axis in an interior 4i of the pressure hose 4. A jacket 4m, which forms the pressure hose 4, is made of a conductive material, in particular rubber. Thus, the second system 1.2 in a potentially explosive environment 72 has ATEX conformity. In particular, the system 1.2 has ATEX conformity according to pressurized enclosure, whereby in particular a protection level pxb or pyb or pzc is achieved. The distributor 7 can be designed, at least in part, according to the description of the Figures 1 to 3be executed.

[0066] The second system 1.2 comprises a backflow prevention device 20. This is arranged in a region of the second end 4b of the first pressure hose 4. This backflow prevention device 20 prevents gas from flowing into the pressure hose 4, particularly via the paint gun 5, against a flow direction x. Furthermore, the painting air supply system LZ2 of the second system 1.2 comprises a pressure switch 16, which monitors a pressure prevailing in the interior 4i of the pressure hose 4 and, if the pressure drops below, for example, 0.5 bar, causes both a shutdown of the heating probe 9 and a shutdown of an ionization device 50. The ionization device 50 is in the Figure 5only shown schematically and can alternatively be arranged before the pressure hose 4 as well as in the pressure hose 4, or after the pressure hose 4. Furthermore, the second system 1.2 comprises either a regulator 21 for purge air or a reset switch 51, so that after a shutdown caused by the pressure switch, the pressure hose 4 is either purged automatically and the second system 1.2 is automatically restarted, or purging is carried out manually and the second system 1.2 is then manually restarted via the reset switch 51. On the basis of the first system 1.1 described in Figure 4 or on the basis of the

[0067] Figure 5 The second system 1.2 described above provides a method for operating the first system 1.1 or the second system 1.2 for painting: that before the start of a first painting process, the paint spray gun 5 is coupled to the first pressure hose 4, that the painting process is carried out, that after the end of the first painting process and at the start of a painting break, the paint spray gun 5 is uncoupled from the first pressure hose 4 and can be connected to the drainage station 6, that while the first pressure hose 4 is connected to the drainage station 6, condensate forming in the first pressure hose 4 is drained from the first pressure hose 4 via the drainage station 6, that after the end of the painting break and before the start of a second painting process, the first pressure hose 4 is uncoupled from the drainage station 6 and the paint spray gun 5 is reconnected to the pressure hose 4.

[0068] In particular, it is also possible to combine the systems 1.1 and 1.2 described above as examples, as a single pressure hose. The compressed gas source can optionally provide at least one of the aforementioned and subsequent compressed gases.

[0069] For the design variants of the Figures 1 to 5 applies that humidified air or warm humidified air or air ionized with 1 to 30 kV or warm air ionized with 1 to 30 kV or nitrogen or nitrogen-enriched compressed air or warm nitrogen or nitrogen-enriched warm compressed air or compressed air or warm compressed air or another compressed gas such as carbon dioxide is supplied to the painting gas supply system 101 or 201 or 301 as compressed gas 3 or painting gas.

[0070] The compressed gas can be heated by activating the hose heater. A selection between compressed air, ionized compressed air, humidified compressed air, nitrogen or nitrogen-enriched compressed air can be made using a corresponding changeover valve. This means that the system can be operated with a wide variety of compressed gases DG. If compressed gas is selected as ionized compressed gas or as humidified air, metal parts or plastic parts that are blown with it can be statically discharged in preparation for the painting process. A selection between different compressed gases can be made using a changeover valve. If compressed gas is selected as ionized compressed gas or as humidified air and used as painting air, metal parts or plastic parts can be statically discharged during a painting process and / or become less statically charged than when air is used as the compressed gas.

[0071] In principle, all versions of the paint gas supply system are ATEX compliant, regardless of the above statements.

[0072] Alternatively or in addition to the above description, the present invention may also be characterized by the following numbered sentences, which describe further aspects and preferred embodiments of the invention and form a part of the description, but which are not claims. 1. Painting gas supply system (101; 201; 301; LZ1; LZ2) comprising a distributor (102; 202; 302; 7), wherein the distributor (102; 202; 302; 7) comprises a connecting piece (103; 203; 303) and a plug unit (104; 204; 304), wherein the connecting piece (103; 203; 303) comprises a first neck (105; 205; 305), a second neck (106; 206; 306) and a third neck (107; 207; 307), wherein the plug unit (104; 204; 304) comprises a head (108; 208; 308) with which the plug unit (104; 204; 304) is connected to a free end (105a; 205a; 305a) of the first neck (105; 205; 305), characterized in that the plug unit (104; 204; 304) and the connecting piece (103; 203; 303) are connected in such a way that an interior space (109; 209; 309) of the connecting piece (103; 203; 303) is closed in such a way and that the interior space (103; 203; 303) is sealed by the head (108; 208; 308) of the plug unit (104; 204; 304) in such a way,that a compressed gas (DG; 3) with a pressure of up to 20 bar can flow through it, that the plug unit (104; 204; 304) comprises a heating probe (110; 210; 310; 9), that the free end (106a; 206a; 306a) of the second neck (106; 206; 306) is designed as a hose connection (111; 211; 311). 2. Painting gas supply system according to sentence 1, characterized in that the painting gas supply system (101; 201; 301; LZ1; LZ2) comprises a first pressure hose (151; 251; 351; 4), which is designed as a conductive pressure hose and in particular as a rubber hose, wherein the painting gas supply system comprises a backflow prevention device (180; 280; 380; 20) installed in the first pressure hose (151; 251; 351; 4) or connected to the first pressure hose (151; 251; 351; 4) and / or wherein the painting gas supply system comprises a pressure switch (116; 216; 316; 16) and in particular a reset switch (51),wherein the pressure switch (116; 216; 316; 16) detects a gas pressure present in the first pressure hose (151; 251; 351; 4), and wherein the reset switch (51) is used to reset the pressure switch (16) after detecting an excessively low pressure. 3. The painting gas supply system according to sentence 2, characterized in that the painting gas supply system comprises a regulator (181; 281; 381; 21) for purge air. 4. Painting gas supply system according to sentence 1 or 2 or 3, characterized in that the painting gas supply system (101; 201; 301; LZ1; LZ2) comprises a second pressure hose (161; 261; 361) or a second pressure line and that a free end (107a; 207a; 307a) of the third neck (107; 207; 307) is designed as a connection (112; 212; 312),to which a compressed gas source (2) is connected directly or with the interposition of the second pressure hose (161; 261; 361) or the second pressure line. 5. Painting gas supply system according to sentence 1 or 2 or 3, or 4, characterized in that the heating probe (110; 210; 310; 9) is designed as a flexible element, wherein the heating probe (110; 9) is designed in particular as an electrical heating probe (113), preferably as a heating cable (114), or wherein the heating probe (210) is designed in particular as a heating probe (213) heated by a liquid, preferably as a heating hose (214), or wherein the heating probe (310) is designed in particular as a gas heating probe (313) heated by a gas, preferably as a heating line (314). 6. Painting gas supply system according to at least one of the preceding sentences, characterized in that the distributor (102; 202; 302; 7) comprises an extension (115; 215; 315),which is connected to a free end (107a; 207a; 307a) of the third neck (107; 207; 307), and the pressure switch (116; 216; 316) is mounted on the extension (115; 215; 315). 7. Painting gas supply system according to at least one of the preceding sentences, characterized in that the painting gas supply system (101; 201; 301; LZ1; LZ2) comprises a safety pressure relief valve (118; 218; 318), wherein a connection between the interior (117; 217; 317) of the distributor (102; 202; 302) and an environment (U) is established by the safety pressure relief valve (118; 218; 318). 8. Painting gas supply system according to at least one of the preceding sentences, characterized in thatthat the heating probe (110; 210; 310; 9) extends with at least half its length (HL110) beyond a free end (106a; 206a; 306a) of the second neck (106; 206; 306) when the plug unit (104; 204; 304) is connected to the connecting piece (103; 203; 303). 9. Painting gas supply system according to at least one of the preceding sentences, characterized in that the connecting piece (103; 203; 303) is designed such that either a longitudinal axis (LA105; LA205) of the first neck (105; 205) and a longitudinal axis (LA106; LA206) ​​of the second neck (106; 206) form a common longitudinal axis (LA156; LA256) and a longitudinal axis (LA107; LA207) of the third neck (107; 207) projects, in particular angled, preferably at right angles to the common longitudinal axis (LA156; LA256) of the first and second necks (105, 106; 205,206) is arranged or a longitudinal axis (LA305) of the first neck (305) and a longitudinal axis (LA307) of the third neck (307) form a common longitudinal axis (LA357) and a longitudinal axis (LA306) of the second neck (306) is arranged so as to protrude, in particular angled, preferably at right angles to the common longitudinal axis (LA357) of the first and third necks (305, 307) or a longitudinal axis of the first neck, a longitudinal axis of the second neck and a longitudinal axis of the third neck are arranged in a Y-like manner to one another. 10. Painting gas supply system according to at least one of the preceding sentences, characterized in that the connecting piece (103; 203; 303) is designed as a T-piece, in which one of the necks (107; 207; 306) with its longitudinal axis (LA107, LA207, LA306) is perpendicular to a common longitudinal axis (LA156, LA256, LA357) of the other two necks (105, 106; 205; 206; 305,307). 11. Painting gas supply system according to at least one of the preceding sentences, characterized in that the heating probe (110; 210; 310; 9) is integrated into a wall of the connecting piece (103; 203; 303) and / or that the heating probe (310; 9) is integrated into a casing (M351; 4m) of the first pressure hose (351; 4) and in particular is integrated circumferentially or surrounds a casing (M351) of the first pressure hose (4) and in particular preferably encircles the first pressure hose (4) in a spiral shape and forms a heating sleeve or in particular runs along a longitudinal extension of the first pressure hose, that it is also provided in particular that the heating probe comprises one or more heating lines that run along a longitudinal axis of the first pressure hose and that the heating probe comprises in particular an individual heating probe or at least two individual heating probes that are arranged along the longitudinal axis,wherein it is particularly provided that the individual heating probe(s) is / are integrated into the casing, wherein it is also particularly provided that the first pressure hose is designed as a so-called multi-lumen hose or multi-chamber hose, which accommodates the compressed air lines and the heating probe(s) or individual heating probe(s) in a single hose or in several individual hoses. 12. A painting gas supply system according to at least one of the preceding sentences, characterized in that the heating probe (9) is designed as an electric heater, wherein the electric heater is arranged in an interior space (4i) of the first pressure hose (4), and the first pressure hose (4) is designed as a conductive pressure hose, such that a pressurized enclosure according to ATEX corresponding to a protection level "p" is realized. 13. A painting gas supply system, particularly according to at least one of the preceding sentences, characterized inthat the first pressure hose (151; 251; 351; 4) comprises a heater, such that ATEX conformity according to pressurized encapsulation and in particular corresponding to a protection level "p" is realized. 14. A painting gas supply system, in particular according to at least one of the preceding sentences, characterized in that the first pressure hose (151; 251; 351; 4) comprises a heater and is designed as a conductive hose and / or a pressure switch (16; 116; 216; 316) that detects a pressure within the first pressure hose (151; 251; 351; 4) and / or a manual and / or automated purging device, such that ATEX conformity according to pressurized encapsulation and in particular corresponding to a protection level "p" is realized. 15. A painting gas supply system, in particular according to at least one of the preceding sentences, characterized inthat the first pressure hose (151; 251; 351; 4) comprises a heater and is designed as a conductive hose and / or a pressure switch (16; 116; 216; 316) which detects a pressure within the first pressure hose (151; 251; 351; 4) and / or a manual and / or automated purging device, such that ATEX conformity is realized in accordance with pressurized encapsulation and in particular in accordance with a protection level "p" and in particular in accordance with the ignition protection type pxb and / or pyb and / or pzc. 16. Painting gas supply system according to at least one of the preceding sentences, characterized in that - either, if only the first pressure hose (151) of the painting gas supply system (101) is operated in an explosive environment (172), the first pressure hose (151) is designed to be ignition-protected by pressurized encapsulation and is formed on the outside from a conductive material - or,the entire painting gas supply system (201) is operated in an explosive environment (272), all components of the painting gas supply system (101; 201; 301) are designed to be ignition-protected by pressurized encapsulation and / or pressure-resistant encapsulation, and the first pressure hose (251) is formed from a conductive material on the outside. 17. A system (1.1; 1.2) for painting, wherein the system (1.1; 1.2) comprises a compressed gas source (2) which provides moist compressed air as compressed gas (39), characterized in that this compressed gas source (2) provides moist compressed air with a relative humidity of at least 30% and preferably at least 40% and is used by means of a paint spray gun (5) for spraying a paint and / or is connected to a breathing mask (23) by means of at least one distributor piece, which is designed in particular as a T-piece. 18. Annex according to sentence 17, characterized in thatthat the system (1.1; 1.2) comprises a painting gas supply system (101; 201; 301; LZ1; LZ2), wherein the painting gas supply system (101; 201; 301; LZ1; LZ2) of the system (1.1; 1.2) is designed according to at least one of sentences 1 to 16 and comprises the distributor (7; 102; 202; 302) and the first pressure hose (4). 19. System according to sentence 17 or 18, characterized in that the system (1.1; 1.2) comprises a painting gas supply system (101; 201; 301; LZ1; LZ2), wherein the painting gas supply system (101; 201; 301; LZ1; LZ2) of the system (1.1; 1.2) comprises the first pressure hose (4; 151; 251; 351) and is connected by means of at least one branch to one or more items of clothing that can be cooled by compressed air. 20. System for painting, in particular according to at least one of sentences 17 to 19, wherein the system (2) comprises a compressed gas source (2) and a painting gas supply system (101; 201; 301; LZ1; LZ2), characterized in thatthat a first pressure hose (4; 151; 251; 351) of the painting gas supply system (101; 201; 301; LZ1; LZ2) has ATEX conformity and in particular has ATEX conformity through pressurized encapsulation. 21. System according to one of the preceding sentences 17 to 20, characterized in that the first pressure hose (4; 151; 251; 351) has ATEX conformity through pressurized encapsulation and in particular through compliance with the protection level pxb and / or pyb and / or pzc, and it is particularly provided that the system comprises a painting gas supply system (101; 201; 301; LZ1; LZ2) which is designed according to at least one of the sentences 1 to 16. 22. A painting system according to one of the preceding sentences 17 to 21, wherein the system (1.1; 1.2) comprises a compressed gas source (2) which provides ionized compressed gas as compressed gas (3), characterized in thatthat this compressed gas source (2) provides an ionized compressed gas in the form of ionized compressed air or ionized nitrogen or ionized nitrogen-enriched compressed air and is used by means of a paint gun (5) to spray a paint and / or is used by blowing off to statically discharge metal and / or plastic surfaces. 23. A painting system, in particular according to at least one of sentences 17 to 22, wherein the system (1.1; 1.2) comprises a compressed gas source (2) which provides ionized compressed gas as the compressed gas (3), characterized in that this ionized compressed gas is used by means of a paint gun (5) to spray a paint and / or is connected to a respiratory mask (23) by means of at least one distributor piece, which is designed in particular as a T-piece. 24. A system according to one of the preceding sentences 17 to 23, characterized in thatthat the system (1.1; 1.2) comprises a painting gas supply system (101; 201; 301; LZ1; LZ2), comprises the first pressure hose (4; 151; 251; 351) and is connected to a respiratory mask (23) by means of at least one distributor piece, which is designed in particular as a T-piece, and / or is connected to one or more items of clothing that can be cooled by means of compressed air by means of at least one branch, and in particular that a compressed air treatment device is located in front of the respiratory mask (23) or the at least one item of clothing and in particular thereby the compressed gas (3) is either cooled or heated and / or either humidified or dehumidified. 25. A painting installation, in particular according to at least one of clauses 17 to 24, wherein the installation (1) comprises a compressed gas source (2), a painting gas supply system (101; 201; 301; LZ1; LZ2), a painting gun (5) for spraying a paint and in particular a dewatering station (6),characterized in that a first pressure hose (4) of the painting gas supply system (101; 201; 301; LZ1; LZ2) is connected during operation of the system (1) either to the paint spray gun (5) or to the drainage station (6) or by means of a distributor piece, which is designed in particular as a T-piece, in particular with the interposition of a further pressure hose to the paint spray gun (5) and / or to the drainage station (6). It is also provided, in particular, that, preferably when using moist air as the compressed gas (3), the first pressure hose (4) is connected to a respiratory mask (23), in particular with the interposition of a breathing air treatment device (22), and / or that the first pressure hose (4) is connected to one or more items of clothing that can be cooled by compressed air, with the interposition of a cooling air supply device. 26. System according to sentence 25, characterized in thatthat the painting gas supply system (101; 201; 301; LZ1; LZ2) of the system (1) is designed according to at least one of sentences 1 to 13 and comprises the distributor (7; 102; 202; 302) and the first pressure hose (4). 27. System according to sentence 26, characterized in that compressed gas (DG, 3) in the form of moist air with a relative humidity of over 40% is supplied via the first pressure hose (4) or compressed gas (DG, 3) in the form of ionized air is supplied via the first pressure hose (4), and that it is particularly provided that the distributor (7) comprises a switching device which is switched to an inflow of moist air or to an inflow of ionized compressed gas. 28. System according to at least one of the preceding sentences 25 to 27, characterized inthat the distributor (7; 102; 202; 302) is either arranged between the compressed gas source (2) and the first pressure hose (4) and is connected directly to the compressed gas source (2) or that the distributor (102; 202; 302; 7) is arranged between a second pressure hose coming from the compressed gas source (2) and the first pressure hose (4) and that it is provided in particular that the painting gas supply device (101; 201; 301; LZ1; LZ2) comprises a changeover valve which is connected to the distributor (102; 202; 302; 7) and to which at least two compressed gas sources (2) are connected, which provide different compressed gases (DG; 3). 29. Installation according to at least one of the preceding sentences 25 to 28, characterized in that a heating probe (110; 210; 310; 9) extends from the connecting piece (103; 203; 303) over at least 50%,in particular 75% and preferably at least 90% of a length of the first pressure hose (151; 10). 30. Method for operating a painting system (1), wherein the system (1) is designed in particular according to at least one of the preceding sentences 17 to 29, characterized in that condensate forming in the first pressure hose (4) is discharged from the first pressure hose (4) before a painting process and / or after a painting process and / or during a painting break between two painting processes, by connecting the first pressure hose (4) to the drainage station (6) and / or by a manual and / or automated or programmed process by means of the compressed gas (3) discharging condensate forming from the first pressure hose (4) into the atmosphere. 31. Method according to sentence 30, characterized in thatthat an automated paint spray gun, such as a painting robot or a painting machine, discharges condensate forming in the first pressure hose (4) into the atmosphere before carrying out a painting process, and this takes place in particular next to an object to be painted and this can be done in particular via a program control. 32. A method for operating a painting system (1), in particular according to sentence 30 or 31, wherein the system (1) is designed in particular according to at least one of the preceding sentences 17 to 29, characterized in that before the start of a first painting process, the paint spray gun (5) is coupled to the first pressure hose (4), that the painting process is carried out, that after completion of the first painting process and at the start of a painting break, the paint spray gun (5) is uncoupled from the first pressure hose (4) and connected to the drainage station (6),that while the first pressure hose (4) is connected to the drainage station (6), condensate forming in the first pressure hose (4) is drained from the first pressure hose (4) via the drainage station (6), that after the end of the painting break and before the start of a second painting process, the first pressure hose (4) is uncoupled from the drainage station (6) and the paint gun (5) is reconnected to the first pressure hose (4). 33. Method according to sentence 32, characterized in that, before the painting process is carried out, metal parts or plastic parts to be painted are statically discharged by blowing air supplied via the first pressure hose (4) in preparation for the painting process, wherein, in particular, compressed air or warm compressed air or ionized compressed air or nitrogen or nitrogen-enriched compressed air is supplied for this purpose, wherein it is particularly provided thatthat ionization is carried out by an ionization device which is connected to the first pressure hose via a distributor. List of reference symbols:

[0073] 1.1, 1.2 First / second system 2 Compressed gas source 3 Compressed gas 4 First pressure hose 4a First end of 4 4b Second end of 4 4i Interior of 4 4m Jacket of 4 5 Spray gun 6 Drainage station 7 Distributor 8 Connector 9 Heating probe 16 Pressure switch 20 Backflow preventer 21 Regulator for purge air 22 Breathing air treatment device 23 Respirator mask 50 Ionization device 51 Reset switch 72 Potentially explosive atmosphere K4b Hose coupling K5 Gun coupling K6 Coupling LZ1, LZ2 First / second spray gas supply system 101Paint gas supply system 102Distributor 103Connector of 102 104Plug unit of 102 105First neck of 103 105aFree end of 105 106Second neck of 103 106aFree end of 106 107Third neck of 103 107aFree end of 107 108Head of 104 109Interior of 103 110Heating probe 111Hose connection 112Connection 113Electric heating probe 114Heating cable 115Extension 116Pressure switch 117Interior of 102 118Safety pressure relief valve 119Pressure regulator 151First pressure hose 151bEnd of 151 161Second pressure hose 171Wall 172Explosive atmosphere 173Non-explosive atmosphere 180Backflow preventer 181Regulator for purge air HL110Half length of 110 L110Length of 110 LA105Longitudinal axis of 105 LA106Longitudinal axis of 106 LA107Longitudinal axis of 107 LA156Common axis of 105 and 106 UEnvironment 201Paint gas supply system 202Distributor 203Connector of 202 204Plug unit of 202 205First neck of 203 205Free end of 205 206Second neck of 203 206Free endof 206 207 third neck of 203 207a free end of 207 208 head of 204 209 interior of 203 210 heating probe 211 hose connection 212 connection 213 gas heating probe 214 heating line 215 extension 216 pressure switch 217 interior of 202 218 safety pressure relief valve 219 pressure regulator 251 first pressure hose 251b end of 251 261 second pressure hose 272 potentially explosive atmosphere 280 backflow preventer 281 regulator for purge air LA205 longitudinal axis of 205 LA206 longitudinal axis of 206 LA207 longitudinal axis of 207 LA256 common axis of 205 and 206 301Paint gas supply system 302Distributor 303Connector of 302 304Plug unit of 302 305First neck of 303 305aFree end of 305 306Second neck of 303 306aFree end of 306 307Third neck of 303 307aFree end of 307 308Head of 304 309Interior of 303 310Heating probe 311Hose connection 312Connection 313Liquid-heated heating probe 314Heating hose 315Extension 316Pressure switch 317Interior of 302 318Safety pressure relief valve 319Pressure regulator351First pressure hose 351bEnd of 351 361Second pressure hose 380Backflow preventer 381Regulator for purge air LA357Common longitudinal axis L305Longitudinal axis L306Longitudinal axis L307Longitudinal axis M351Sheath of 351 xFlow direction

Claims

1. Painting gas supply system (101; 201; 301; LZ1; LZ2) comprising a distributor (102; 202; 302; 7), wherein the distributor (102; 202; 302; 7) comprises a connecting piece (103; 203; 303) and a plug unit (104; 204; 304), - wherein the connecting piece (103; 203; 303) comprises a first neck (105; 205; 305), a second neck (106; 206; 306) and a third neck (107; 207; 307), - wherein the plug unit (104; 204; 304) comprises a head (108; 208; 308) with which the plug unit (104; 204; 304) is connected to a free end (105a; 205a; 305a) of the first neck (105; 205; 305), characterized by - thatthe plug unit (104; 204; 304) and the connecting piece (103; 203; 303) are connected in such a way that an interior space (109; 209; 309) of the connecting piece (103; 203; 303) is closed in such a way and that the interior space (103; 203; 303) is sealed by the head (108; 208; 308) of the plug unit (104; 204; 304) in such a way that a compressed gas (DG; 3) with a pressure of up to 20 bar can flow through it, - that the plug unit (104; 204; 304) comprises a heating probe (110; 210; 310; 9), - that a free end (106a; 206a; 306a) of the second neck (106; 206; 306) is designed as a hose connection (111; 211; 311).

2. Painting gas supply system according to claim 1, characterized in thatthe painting gas supply system (101; 201; 301; LZ1; LZ2) - comprises a first pressure hose (151; 251; 351; 4), which is designed as a conductive pressure hose and in particular as a rubber hose, - wherein the painting gas supply system comprises a backflow prevention device (180; 280; 380; 20) installed in the first pressure hose (151; 251; 351; 4) or connected to the first pressure hose (151; 251; 351; 4) and / or - wherein the painting gas supply system comprises a pressure switch (116; 216; 316; 16) and in particular a reset switch (51), wherein the pressure switch (116; 216; 316; 16) has a pressure switch (116; 216; 316; 16) installed in the first pressure hose (151; 251; 351; 4) detects the gas pressure present, and wherein the pressure switch (16) can be reset by means of the reset switch (51) after detection of an excessively low pressure.

3. Painting gas supply system according to claim 1 or 2, characterized in thatthe painting gas supply system (101; 201; 301; LZ1; LZ2) comprises a second pressure hose (161; 261; 361) or a second pressure line and that a free end (107a; 207a; 307a) of the third neck (107; 207; 307) is designed as a connection (112; 212; 312) to which a compressed gas source (2) is connected directly or with the interposition of the second pressure hose (161; 261; 361) or the second pressure line.

4. Painting gas supply system according to claim 1, 2 or 3, characterized in thatthe heating probe (110; 210; 310; 9) is designed as a flexible element, - wherein the heating probe (110; 9) is designed in particular as an electrical heating probe (113), preferably as a heating cable (114), or - wherein the heating probe (210) is designed in particular as a heating probe (213) heated by a liquid, preferably as a heating hose (214), or - wherein the heating probe (310) is designed in particular as a gas heating probe (313) heated by a gas, preferably as a heating line (314).

5. Painting gas supply system according to at least one of the preceding claims, characterized in that the heating probe (110; 210; 310; 9) extends at least half its length (HL110) beyond the free end (106a; 206a; 306a) of the second neck (106; 206; 306) when the plug unit (104; 204; 304) is connected to the connecting piece (103; 203; 303).

6. Painting gas supply system according to at least one of the preceding claims, characterized in thatthe connecting piece (103; 203; 303) is designed such that - either a longitudinal axis (LA105; LA205) of the first neck (105; 205) and a longitudinal axis (LA106; LA206) ​​of the second neck (106; 206) form a common longitudinal axis (LA156; LA256) and a longitudinal axis (LA107; LA207) of the third neck (107; 207) is arranged projecting, in particular angled, preferably at right angles, to the common longitudinal axis (LA156; LA256) of the first and second necks (105, 106; 205, 206) - or a longitudinal axis (LA305) of the first neck (305) and a longitudinal axis (LA307) of the third neck (307) form a common longitudinal axis (LA357) and a longitudinal axis (LA306) of the second neck (306) is arranged projecting, in particular angled, preferably at right angles, to the common longitudinal axis (LA357) of the first and third necks (305, 307) - or a longitudinal axis of the first neck, a longitudinal axis of the second neck and a longitudinal axis of the third neck are arranged in a Y-like manner to one another.

7. Painting gas supply system according to at least one of the preceding claims, characterized by - that the heating probe (110; 210; 310; 9) is integrated into a wall of the connecting piece (103; 203; 303) and / or - that the heating probe (310; 9) is integrated into a casing (M351; 4m) of the first pressure hose (151; 251; 351; 4) and in particular is integrated circumferentially or surrounds a casing (M351) of the first pressure hose (151; 251; 351; 4) and in particular preferably circulates spirally around the first pressure hose (151; 251; 351; 4) and forms a heating sleeve or in particular runs along a longitudinal extension of the first pressure hose (151; 251; 351; 4), - thatit is also provided in particular that the heating probe comprises one heating line or several heating lines which run along a longitudinal axis of the first pressure hose (151; 251; 351; 4) and that the heating probe comprises in particular one individual heating probe or at least two individual heating probes which are arranged along the longitudinal axis, wherein it is particularly provided that the individual heating probe or individual heating probes is or are integrated into the jacket, wherein it is also provided in particular that the first pressure hose (151; 251; 351; 4) is designed as a so-called multi-lumen hose or multi-chamber hose which accommodates the compressed air lines and the heating probes or individual heating probes in one individual hose or in several individual hoses.

8. Painting gas supply system according to at least one of the preceding claims, characterized in thatthe first pressure hose (151; 251; 351; 4) comprises a heater and is designed as a conductive hose and / or a pressure switch (16; 116; 216; 316) which detects a pressure within the first pressure hose (151; 251; 351; 4) and / or a manual and / or automated purging device, such that ATEX conformity is realized in accordance with pressurized encapsulation and in particular in accordance with a protection level "p" and in particular in accordance with the ignition protection type pxb and / or pyb and / or pzc.

9. Painting gas supply system according to at least one of the preceding claims, characterized in that- either, if only the first pressure hose (151; 251; 351; 4) of the painting gas supply system (101) is operated in an explosive environment (172), the first pressure hose (151; 251; 351; 4) is designed to be ignition-protected by pressurized encapsulation and is formed on the outside from a conductive material - or, if the entire painting gas supply system (201) is operated in an explosive environment (272), all components of the painting gas supply system (101; 201; 301) are designed to be ignition-protected by pressurized encapsulation and / or pressure-resistant encapsulation and the first pressure hose (151; 251; 351; 4) is formed on the outside from a conductive material.

10. Plant (1.1; 1.2) for painting, whereby the plant (1.1; 1.2) comprises a compressed gas source (2) which provides (a) moist compressed air as compressed gas (3), wherein this compressed gas source (2) provides moist compressed air with a relative humidity of at least 30% and preferably at least 40% and is used by means of a paint spray gun (5) for spraying a paint and / or is connected to a breathing mask (23) by means of at least one distributor piece, which is in particular designed as a T-piece, and / or (b) provides ionized compressed gas, wherein this compressed gas source (2) provides an ionized compressed gas in the form of - ionized compressed air or - ionized nitrogen or - ionized nitrogen-enriched compressed air and is used by means of a paint spray gun (5) for spraying a paint and / or is used by blowing off to statically discharge metal and / or plastic surfaces, and / or (c) provides warm compressed air, wherein the system (1.1; 1.2) comprises a painting gas supply system (101; 201; 301; LZ1; LZ2), wherein the painting gas supply system (101; 201; 301; LZ1; LZ2) of the system (1.1; 1.2) is designed according to at least one of claims 1 to 9 and comprises the distributor (7; 102; 202; 302) and a first pressure hose (151; 251; 351; 4).

11. Plant according to claim 10, characterized in that the system (1.1; 1.2) is connected to a respiratory protection mask (23) by means of at least one distributor piece, which is designed in particular as a T-piece, and / or is connected to one or more items of clothing that can be cooled by means of compressed air by means of at least one branch, and in particular that a compressed air treatment device is located in front of the respiratory protection mask (23) or the at least one item of clothing and in particular thereby the compressed gas (3) is either cooled or heated and / or either humidified or dehumidified.

12. Painting plant according to at least one of claims 10 to 11, wherein the plant (1) comprises in particular a drainage station (6), characterized in thatthe first pressure hose (151; 251; 351; 4) of the painting gas supply system (101; 201; 301; LZ1; LZ2) is connected during operation of the system (1) optionally to the paint spray gun (5) or to the drainage station (6) or by means of a distributor piece, which is designed in particular as a T-piece, in particular with the interposition of a further pressure hose to the paint spray gun (5) and / or to the drainage station (6) and that it is also provided in particular that - preferably when using moist air as the compressed gas (3), the first pressure hose (151; 251; 351; 4) is connected to a breathing mask (23), in particular with the interposition of a breathing air treatment device (22) and / or - that the first pressure hose (151; 251; 351; 4) is connected with the interposition of a cooling air supply device to one or more by means of Compressed air cooled clothing is connected.

13. Plant according to at least one of the preceding claims 10 to 12, characterized in that the heating probe (110; 210; 310; 9) extends from the connecting piece (103; 203; 303) over at least 50%, in particular 75% and preferably at least 90%, of a length of the first pressure hose (151; 251; 351; 4).

14. Method for operating a painting plant (1), wherein the plant (1) is designed in particular according to at least one of the preceding claims 10 to 13, characterized in thatCondensation water forming in the first pressure hose (151; 251; 351; 4) is discharged from the first pressure hose (151; 251; 351; 4) before a painting process and / or after a painting process and / or during a painting break between two painting processes, characterized in that the first pressure hose (151; 251; 351; 4) is connected to a drainage station (6) and / or condensation water forming in the first pressure hose (151; 251; 351; 4) is discharged into the atmosphere by means of the compressed gas (3) through a manual and / or automated or programmed process, wherein preferably an automated paint spray gun such as a painting robot or an automatic paint sprayer discharges condensation water forming in the first pressure hose (4) into the atmosphere before carrying out a painting process, and this takes place in particular next to an object to be painted and this takes place in particular via a program control can.

15. Method for operating a painting plant (1) according to claim 14, characterized by - that before starting a first painting process, the paint gun (5) is coupled to the first pressure hose (151; 251; 351; 4), - that the painting process is carried out, - that after completion of the first painting process and at the start of a painting break, the paint gun (5) is uncoupled from the first pressure hose (151; 251; 351; 4) and connected to the drainage station (6), - that while the first pressure hose (151; 251; 351; 4) is connected to the drainage station (6), condensate forming in the first pressure hose (151; 251; 351; 4) is discharged from the first pressure hose (151; 251; 351; 4) via the drainage station (6), - thatafter the end of the painting break and before the start of a second painting process, the first pressure hose (151; 251; 351; 4) is uncoupled from the drainage station (6) and the paint spray gun (5) is recoupled to the first pressure hose (151; 251; 351; 4), wherein, preferably before the painting process is carried out, metal parts or plastic parts to be painted are statically discharged by blowing air supplied via the first pressure hose (4) in preparation for the painting process, wherein, for this purpose, compressed air or warm compressed air or ionized compressed air or nitrogen or nitrogen-enriched compressed air is supplied, wherein it is particularly provided that ionization is carried out by an ionization device which is connected to the first pressure hose via a distributor.

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