EP3401019B1 - Dispositif d'humidification d'air comprimé - Google Patents

Dispositif d'humidification d'air comprimé Download PDF

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Publication number
EP3401019B1
EP3401019B1 EP18155834.7A EP18155834A EP3401019B1 EP 3401019 B1 EP3401019 B1 EP 3401019B1 EP 18155834 A EP18155834 A EP 18155834A EP 3401019 B1 EP3401019 B1 EP 3401019B1
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EP
European Patent Office
Prior art keywords
water
compressed air
air
based paint
container
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18155834.7A
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German (de)
English (en)
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EP3401019A1 (fr
Inventor
Herbert Hauptkorn
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Individual
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Individual
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Publication of EP3401019A1 publication Critical patent/EP3401019A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2405—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle
    • B05B7/2416—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle characterised by the means for producing or supplying the atomising fluid, e.g. air hoses, air pumps, gas containers, compressors, fans, ventilators, their drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2489—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device
    • B05B7/2491—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device characterised by the means for producing or supplying the atomising fluid, e.g. air hoses, air pumps, gas containers, compressors, fans, ventilators, their drives

Definitions

  • the invention relates to a device for humidifying compressed air, in particular for an application device for water-based paint.
  • Devices for air treatment in particular from the field of painting systems for water-based paints, are known from the prior art, which are designed to create suitable atmospheric ambient conditions for the painting process. For this purpose, it is known, for example, to set a predetermined relative air humidity in a room or a cabin in which the painting system is located.
  • the water-based paint is typically applied by means of an application device.
  • application devices can be designed, for example, as rotary atomizers or spray guns.
  • a device for humidifying compressed air in particular for a compressed air-assisted application device for water-based lacquer, comprises a pressure-tight container which is partially filled with water and has an air inlet and an air outlet for compressed air.
  • the air inlet is arranged below the water level of the water bath contained in the pressure-resistant container and the air outlet above the water level of the water bath contained in the pressure-resistant container.
  • the invention is based on the observation that when water-based paint is atomized under high pressure, a great deal of moisture is released into the ambient air and thus overspray is produced. This loss of moisture leads on the one hand to the fact that the crosslinking and film sealing of the water-based paint on the component to be painted is no longer satisfactory, and on the other hand increased material consumption is caused, which in particular requires frequent cleaning of the filter systems filtering the ambient air in the painting area and thus increased production costs .
  • the compressed air supplied to the compressed air-assisted application device for atomizing the water-based paint is usually very dry, since the moisture originally contained in the air is removed by compression and refrigeration technology. It has been shown that this dry compressed air continues to draw water from the water-based paint. In the context of the invention it is therefore proposed to operate the application device with humidified compressed air.
  • Air-assisted application devices for water-based paint are, in particular, those devices which are suitable for atomizing the water-based paint under the influence of compressed air.
  • Application devices supported by compressed air can be operated in particular by compressed air and include, for example, rotary atomizers, disk atomizers, bell atomizers and / or one or more atomizer nozzles.
  • the humidification of the compressed air intended for atomizing the water-based paint is carried out by introducing the dry compressed air, which is provided, for example, in a manner known per se by a compressor, via the air inlet below the water level into the container, which is partly filled with water. Since the air outlet is above the water level, the compressed air flow must flow through the water bath and absorb moisture. This at least counteracts the drying out of water-based paint components that come into direct or indirect contact with the compressed air flow during the painting process.
  • the water bath contained in the pressure-resistant container can preferably be heated by means of a heating device.
  • the temperature of the compressed air supplied can thus be adjusted and in particular increased as it flows through the water bath. Air with an elevated temperature usually shows. A. a larger capacity to absorb water vapor or moisture.
  • it is advantageous to humidify the compressed air flow as this can reduce the proportion of overspray that escapes into the environment.
  • the water-based paint cools down when atomizing due to the adiabatic evaporative cooling, so that the surface of the painted component has a significantly lower temperature than the ambient air.
  • the temperature and humidity of the ambient air in painting systems is typically specified by supply air systems.
  • the temperature of the water bath contained in the pressure-resistant container can preferably be measured by means of a temperature sensor.
  • the temperature sensor and the heating device are operatively connected to a control device such that the temperature of the water bath can be controlled.
  • the temperature of the water bath can in particular be controlled in such a way that it always remains within a predeterminable tolerance range.
  • the moisture content and / or the temperature of the compressed air are controlled in that a control unit adjusts a throttle regulator arranged at the air inlet and / or the heating device accordingly in accordance with an actual setpoint adjustment.
  • a droplet separation unit is preferably connected downstream of the air outlet. This ensures that condensing water can be separated from the compressed air stream leaving the pressure-resistant container.
  • An air heating unit is connected downstream of the air outlet.
  • the air heating unit is preferably designed to match the droplet separation unit and, on the one hand, serves to supply the application device with a compressed air stream which has a predeterminable temperature.
  • the subsequently heated compressed air stream can absorb a larger amount of moisture, so that the application device is provided with a compressed air stream largely free of condensation.
  • the dry compressed air that can be supplied via a connection can preferably be provided to an application device via a connecting piece, bypassing the water bath contained in the container. It is thereby achieved that the lines which carry compressed air humidified during the painting process, in particular compressed air saturated with moisture, can subsequently be flushed with dry compressed air. No condensate or only negligible condensate will then accumulate in the lines, which could have a negative effect if the painting process is restarted.
  • the invention further relates to a painting device for water-based paint, which comprises the device described above and the compressed air-assisted application device for water-based paint.
  • the application device is connected to the device for compressed air-assisted atomization of the water-based paint.
  • Figure 1 shows a device 1 for humidifying compressed air with a pressure-resistant container 2, which contains a water bath.
  • the fill level can be detected by means of water level sensors 3, 4.
  • the temperature of the water bath can be measured by means of a temperature sensor 5.
  • Water can be introduced into the container 2 via a water inlet 6. Inside the container 2 there is an internal pressure which is higher than normal conditions and which is, for example, a few bar.
  • the water supply is non-return secured via a valve 7, which is designed in particular as a solenoid valve.
  • a heating device 8 which is designed to heat the water bath inside the container 2 to a predeterminable temperature.
  • An air inlet 9 for compressed air is arranged on the bottom of the pressure-resistant container 2, so that compressed air blown in rises through the water bath and thereby absorbs moisture.
  • An air outlet 10, via which the humidified compressed air leaves the container 2, is arranged on the ceiling of the container 2.
  • a droplet separating unit 11 is connected downstream of the air outlet 10 in terms of flow technology, which is used in particular to separate condensed or condensing water components from the compressed air stream leaving the air outlet 10.
  • the droplet separating unit 11 is further followed by a distributor 12 which is connected to a further distributor 15 via a connector 13.
  • the further distributor piece 15 has a connection 16 for supplying dry compressed air.
  • the flow cross section of the connecting piece 13 can be changed via a fitting 14.
  • the valve 14 is designed as a shut-off valve or as a ball valve, so that a flow through the connector 13 can be completely interrupted.
  • a compressor for supplying dry compressed air can be connected to the connection 16.
  • the pipe connection between the further distributor piece 15 and the air inlet 9 can be shut off via a further fitting 17, in particular designed as a shut-off valve.
  • the size of the compressed air flow supplied to the air inlet 9 can also be changed via a throttle controller 18.
  • the distributor piece 14 is also fluidly connected to a further connection 19 for a compressed air-assisted application device 100.
  • An air heating unit 20 is arranged between the distributor piece 12 and the further connection 19 for the application device 100 and is designed to heat the compressed air stream flowing through to a predetermined temperature.
  • the application device 100 When operating the application device 100, it is supplied with humidified compressed air. Dry compressed air is fed into the device 1 via the connection 16. For this purpose, the valve 14 in the connector 13 is to be closed and the other valve 15 to be opened.
  • the dry compressed air supplied via the connection 16 flows through the water bath contained in the pressure-resistant container 2 before it is delivered to the application device 100.
  • the compressed air absorbs moisture as it flows through the water bath.
  • the water bath is optionally heated by means of the heating device 8, so that the compressed air is also heated as it flows through the water bath.
  • the throughput in the container 2 or the volume flow is preferably less than 1 m 3 per second.
  • constant ambient conditions are created by means of a supply air system, which favor the painting process.
  • the painting process takes place in one possible embodiment at about 22 ° C and a relative humidity of about 80%.
  • the compressed air for the application device 100 provided for applying the water-based paint is preferably processed in accordance with the ambient conditions and therefore also has a temperature of approximately 22 ° C. and a relative air humidity of approximately 80% in the case mentioned by way of example.
  • the temperature of the compressed air supplied is specified via the temperature of the water bath and via the air heating unit 20.
  • the air heating unit 20 is in particular intended to counteract the condensation of water drops which can occur when the compressed air stream saturated with moisture cools down.
  • the fitting 14 in the connecting piece 13 is opened and the further fitting 15 is closed.
  • the fluid connection to the application device 100 in particular a hose arranged between the connection 19 and the application device 100, is flushed with dry compressed air, which is supplied via the connection 16, so that no moist air remains in this area. This ensures in particular that no condensation forms in this area, which could negatively influence the painting result when carrying out a further painting process.

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  • Nozzles (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)

Claims (6)

  1. Dispositif (1), conçu pour humidifier de l'air comprimé pour un dispositif d'application air-assisté (100) pour laques à l'eau, caractérisé par un récipient (2) résistant à la pression, partiellement rempli d'eau, avec une entrée d'air (9) et une sortie d'air (10) pour l'air comprimé, dans lequel l'entrée d'air (9) est disposée au-dessous d'une surface de l'eau d'un bain-marie contenu dans le récipient (2) et la sortie d'air (10) est disposée au-dessus de la surface de l"eau du bain-marie contenu dans le récipient, une unité de chauffage à air (20) étant placée en aval de la sortie d'air (10).
  2. Dispositif (1) selon la revendication 1, caractérisé en ce que le bain-marie contenu dans le récipient (2) résistant à la pression peut être chauffé au moyen d'un dispositif de chauffage (8).
  3. Dispositif (1) selon la revendication 1 ou 2, caractérisé en ce que la température du bain-marie contenu dans le récipient (2) résistant à la pression peut être mesurée au moyen d'une sonde de température (5).
  4. Dispositif (1) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une unité de séparation de gouttes (11) est placée en aval de la sortie d'air (10).
  5. Dispositif (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que de l'air comprimé qui peut être alimenté par l'intermédiaire d'un raccord (16) peut être fourni à un dispositif d'application (100) à travers une pièce de jonction (13) en contournant le bain-marie contenu dans le récipient (2).
  6. Installation de peinture pour laques à l'eau, caractérisée par un dispositif (1) selon l'une quelconque des revendications précédentes et un dispositif d'application air-assisté (100) pour laques à l'eau, raccordé au dispositif (1) pour une atomisation air-assistée de la laque à l'eau.
EP18155834.7A 2017-05-09 2018-02-08 Dispositif d'humidification d'air comprimé Active EP3401019B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017109932.8A DE102017109932A1 (de) 2017-05-09 2017-05-09 Vorrichtung zur Befeuchtung von Druckluft

Publications (2)

Publication Number Publication Date
EP3401019A1 EP3401019A1 (fr) 2018-11-14
EP3401019B1 true EP3401019B1 (fr) 2020-03-25

Family

ID=61188713

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EP18155834.7A Active EP3401019B1 (fr) 2017-05-09 2018-02-08 Dispositif d'humidification d'air comprimé

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EP (1) EP3401019B1 (fr)
DE (1) DE102017109932A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202020005425U1 (de) * 2019-11-21 2021-03-03 Thomas Mayer Lackiergas-Zuleitungssystem

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3321191A (en) * 1966-02-11 1967-05-23 Herand K Najarian Gas and liquid contact apparatus
DE8434355U1 (de) * 1984-11-23 1985-02-21 Sata-Farbspritztechnik GmbH, 7140 Ludwigsburg Vorrichtung zum reinigen von druckluft
DE3518041A1 (de) * 1985-05-20 1986-11-20 Helmut 7022 Leinfelden-Echterdingen Jüngling Regelbarer luftbefeuchter fuer saug oder druckluftbetrieb
EP0305748A3 (fr) * 1987-09-04 1990-05-02 Ransburg-Gema AG Installation de préparation de poudre de revêtement
ITTO20010278A1 (it) * 2001-03-23 2002-09-23 Anest Iwata Europ Srl Pistola automatica a spruzzo.
FR2835438B1 (fr) * 2002-02-07 2004-04-23 Cogema Procede et installation de production d'air respirable
AT504677B1 (de) * 2007-01-03 2010-05-15 Hauptkorn Herbert Verfahren zum lackieren einer oberfläche mit einem wasserlack
DE202007012990U1 (de) * 2007-09-17 2009-02-12 Carcoustics Techconsult Gmbh Luftreinigungsvorrichtung für Fahrzeuge
AT13361U1 (de) * 2012-03-12 2013-11-15 Hauptkorn Herbert Vorrichtung zur Luftaufbereitung für einen Raum mit einer Lackieranlage für Wasserlacke

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
DE102017109932A1 (de) 2018-11-15
EP3401019A1 (fr) 2018-11-14

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