DE202009013054U1 - System for controlling the cabin interior temperature in a drying and / or painting booth - Google Patents

Abstract

Drying booth for refinishing vehicles and vehicle parts, in particular for drying in conjunction with water-based paint, with a closed cabin housing (1), a filter cover (21) through which air is distributed over the ceiling cross-section directed against the vehicle and sucked off the cabin floor, with a Blower and heating device (2) for blowing heated air into the cabin for heating and / or drying an object therein (3), wherein next to the filter cover (21) exhaust nozzles (22) are arranged by the heated supply air obliquely downwards and towards the object (3) is directed, characterized in that a non-contact temperature sensor (4) is provided in or on the drying and / or painting booth (1), the contactless temperature on the surface of the heated and / or to be dried object (3) senses, and that a control and regulating device is provided which detects the signals of the Temperature sensor evaluates and the blower and heater (2) depending on the sensed surface temperature of the object to be heated and / or dried ...

Description

The The invention relates to a system for controlling the cabin interior temperature in a drying and / or painting booth with a blower and heater warmed up for blowing Air in the cabin for heating and / or drying an object therein.

In the current painting and drying equipment is the cabin inlet temperature determined and regulated. The temperature sensor is located in the immediate vicinity Near the Filter cover or in the supply air duct for the warmed-up air itself. The desired object temperature The parts will be based on experience and time-consuming comparative measurements nearly specified as cabin inlet temperature. There are enormous deviations possible. In certain circumstances It may be due to local overheating too significant impairments the quality come to be dried parts. Furthermore, due to the hypothetical requirements unnecessary Energy wastes are not excluded.

In usual Combined cabins (combined painting and drying systems) will be the Dry process by switching the system to recirculation mode and simultaneously heating up initiated. In the cabin poses After a certain heat-up time, the circulating air temperature. After the object to be dried for a certain time in this operating state dried, the plant is either automatically or by Hand again in the painting condition, d. h., on the pure fresh and exhaust air mode switched. The operator receives neither one information about the object temperature of the workpiece still over the holding time (drying time at object temperature). Compliance The drying time at object temperature is just the criterion that the paint manufacturer for a complete Drying and curing prescribe the paint film.

task In accordance with the invention, an improved drying and / or painting booth is available pose, in which the warming and / or drying an object therein more efficiently he follows.

These Task is a system for controlling the cabin interior temperature solved according to the features of claim 1.

According to the invention is a Drying cabin for Refinishing of vehicles and vehicle parts, in particular for drying in conjunction with water-based paint, proposed with a closed cabin housing, a filter cover, through which air is distributed over the ceiling cross section directed against the vehicle and sucked off at the cabin floor, with a fan and heating device for blowing heated air into the cabin warming and / or drying of an object therein, in addition to the filter cover outlet nozzles are arranged in particular for generating turbulence in the air flow, through the heated ones Supply air at an angle directed downward and against the vehicle, which is characterized that one contactless working temperature sensor in or on the drying and / or Lackier-cabin is provided, which the contactless temperature on the surface to be heated and / or object to be dried, and that a tax and control device is provided, which signals the Temperature sensor evaluates and the blower and heater depending the sensed surface temperature to be heated and / or object to be dried to achieve a predetermined Surface temperature value controls the object, the air flow through the exhaust nozzles in dependence the sensed surface temperature is controlled by the control and regulating device.

From Advantage is in combination with the also called "Multi-Air Nozzle System" Exhaust nozzles through the high air turbulence at the same time the heat transfer of the to be dried Enormously favored components, so that after a short time an approximately same temperature profile adjusts to all components.

One Advantage of temperature control over the temperature measured directly on the object is that the actual Object temperature can be detected, displayed and regulated. This provides a higher one quality the paint drying. Furthermore, through the optimal adaptation of the Blowing temperature to the (desired by the paint manufacturer) Object temperature and their compensation allows energy savings.

Next which now made possible Process reliability through the automated control of the object temperature is through the combination with the exhaust nozzles, also multi-air system called, a significant time and energy savings of the drying process achieved, after reaching the object temperature, the heating power and the air power is reduced.

The System may continue to benefit with a timer and display be equipped to inform the operator about the essential parameters Object temperature, circulating air temperature, remaining drying time informed.

The individual phases of the drying process can additionally via a provided on the system Operating mode lamp signaled.

A advantageous development of the invention provides that the temperature sensor a small opening angle for the heat radiation to be received and corresponding to a small surface portion of the object to be dried can be aligned.

preferably, the temperature sensor is designed movably adjustable and as an alignment aid is a light or Laser beam emitting target device associated with the temperature sensor, the so coupled with the temperature sensor is that the light or Laser beam essentially in the middle of the small opening angle defined sensor measuring range radiates and thus to the center of the small surface portion aims.

From The advantage is the temperature sensor on a support arm inside the Cabin is articulated adjustable to the object.

For the temperature sensor and / or the alignment aid is provided according to a further embodiment, that a direction adjustment device is assigned to this, which in particular by means of a remote control motor adjustable is.

From Advantage is the temperature sensor by an infrared sensor or formed by a pyrometer.

To a further advantageous embodiment of the invention is provided that in or on the cabin several particular different sides to be heated and / or object to be dried associated with temperature sensors are provided.

Further advantageous embodiments will become apparent from the other dependent claims or their possible Subcombinations.

following the invention will be further explained with reference to the drawings. in the Individual shows the schematic representation in:

1 a schematic representation of a system according to the invention for controlling the cabin interior temperature,

2 a view of the cabin 1 .

3 a side view of a variant of the invention, in which the temperature sensor is associated with a target device and both are designed to pivot together, and

4 a schematic exemplary diagram of the temperature profile T over the time t of a drying ka bine with a system according to the invention for controlling the cabin interior temperature.

The in the figures, the same reference numerals designate the same or the same acting elements.

In 1 is a drying booth according to the invention 1 with control of cabin interior temperature with a blower and heater 2 for blowing heated air into the cabin for heating and / or drying an object therein 3 shown.

The air is passing through a heater 11 heated and by blower 10 through the supply air ducts over the filter cover 21 and the switchable exhaust nozzles 22 blown into the interior of the cabin.

In the cabin 1 is a non-contact temperature sensor, in the example formed by an infrared sensor, is provided, the contactless temperature at the surface of the object to be dried 3 , in the example in freshly painted car, senses.

By means of a control and regulating device, the signals of the temperature sensor 4 evaluates and to blowers 10 and a heater 11 controlled in response to the sensed surface temperature to achieve a predetermined surface temperature value of the object.

In the example shown, there is a holding arm for aligning the sensor with the object 8th inside the cabin 1 an adjustable to the object 3 hinged. This allows an optimum distance for the sensor to be set.

In 2 is a top view of the drying booth 1 out 1 shown with big goals 9 Is provided.

In 3 a variant of the system according to the invention is shown in which the temperature sensor 4 pivotable near the cabin ceiling is articulated and a small opening angle 41 for the heat radiation to be received from the object surface and corresponding to a small surface portion of the object to be dried 3 is alignable.

The temperature sensor 4 is movable for this purpose (see arrow 5 ) and designed as an alignment aid for the measuring range in the example, a laser beam emitting a target device 6 the temperature sensor 4 assigned. This is mechanically coupled to the temperature sensor, so that the laser beam substantially centrally in the defined by the small opening angle Sen sormessbereich 7 shine.

The adjustment takes place via a pivoting device 12 which is motorized adjustable by means of a remote control by the staff.

The sighting laser 6 is by opening the cabin door 9 (please refer 2 ), or when a button is pressed, and switches itself off when the gate closes or after a preselected time. The infrared sensor 4 constantly measures the actual object temperature of the part to be dried 3 and sends a corresponding signal to the controller of the fan 10 and the heater 11 the cabin continues. Based on the ratio to the desired and actual object temperature, the cabin inlet temperature is controlled. With increasing object temperature, for example, the cabin inlet temperature is reduced and adapted to the required object temperature.

The Setting the setpoints, for example via a Touch panel of the system. There is the possibility of drying programs for drying to call the paints. The drying process can be automatic with signaling of the end of the drying process. The limit the cabin inlet temperature (which by means of temperature sensor in Area of the ceiling filter is measured) can also over the Touch screen in a single or program configuration allows.

After this so far almost "im Flying blind " So it has been dried according to experience, can with the system of the invention the actual object temperature be determined continuously and so the heating program much more optimal be managed.

A schematic exemplary diagram of the temperature profile T over the time t of a drying booth with a system according to the invention for controlling the cabin interior temperature to clarify the achieved advantages is shown in FIG 4 shown. The temperature 14 the blown-in air will reach the desired object temperature 13 brought very close to this. This is reflected in the ever decreasing temperature differences 17 and 18 at the beginning A towards the end B of the stable drying process.

In comparison, the dashed line shows 15 the temperature profile of a conventional drying booth. By the now possible dynamic lowering of the Einblastemperatur no unnecessary energy is wasted. This is done by comparing the previous heating curve 15 with the reach now 14 clear. The system automatically adjusts itself briefly when a second object is brought into the cabin (see B and A 'in the diagram) and the same temperature profile 16 of the object adjusts quickly without readjustment.

The Drying program is running fully automatic. It just has to be the orientation of the temperature sensor on the drying surface and a selection, if that required, the desired Drying temperature can be adjusted. Everything else is automatic adjustable.

If an even more precise observation of the object temperature is necessary or if several values for different sides of an object are to be able to be detected in or at the booth 1 be provided a plurality of temperature sensors.

• – Laserstrahl und damit den durch den Sensor überwachten Bereich auf das zu trocknende Bauteil ausrichten
• – Trocknungsprogramm an der Steuerung auswählen (Objekttemperatur, Haltezeit, Luftmenge Düsensystem)
• – Trocknungsprogramm, beispielsweise durch eine Bildschirm-Eingabe starten
• – Die Anlage schaltet auf Umluftbetrieb um, ein Teil der Gesamtluft strömt jetzt aus den Düsen über der Beleuchtung, der Hauptanteil strömt über die Filterdecke. Durch die stärkere Umströmung (turbulente Luftführung) wird das Werkstück im Vergleich zur reinen Strömung über die Filterdecke wesentlich schneller (bis zu 50 Zeiteinsparung) auf Objekttemperatur gebracht.
• – Nach Erreichen der Objekttemperatur wird das Düsensystem abgeschaltet, die Temperatur wird auf ein Niveau nahe Objekttemperatur reduziert, die Ventilator-Umluftleistung wird ebenfalls reduziert. Alle wesentlichen Parameter wie verbleibende Haltezeit, Objekttemperatur werden am Display angezeigt.
• – Eine Betriebsartenleuchte (oder -lampe) signalisiert die Betriebszustände wie Aufheizen auf Objekttemperatur – Haltezeit läuft – Trocknungsprozess abgelaufen.

A procedure for operating the drying booth can proceed as follows:

• - Align laser beam and thus the area monitored by the sensor on the component to be dried
• - select the drying program on the control (object temperature, holding time, air quantity, nozzle system)
• - Start drying program, for example by entering a screen
• - The system switches over to recirculation mode, part of the total air now flows out of the nozzles above the lighting, the main part flows over the filter cover. Due to the stronger flow (turbulent air flow), the workpiece is brought to object temperature much faster (up to 50 time savings) than the pure flow through the filter cover.
• - After reaching the object temperature, the nozzle system is switched off, the temperature is reduced to a level close to the object temperature, the fan circulating air flow is also reduced. All essential parameters such as remaining holding time, object temperature are shown on the display.
• - A mode light (or lamp) signals the operating conditions such as heating to object temperature - holding time is running - drying process expired.

It is no longer as usual manual switching of the system to dry operation, and manual switch back the system on painting or the time-controlled automatic switching on painting after the drying time necessary.

1

drying and / or paint booth

2

Blower and heater

3

object

4

Temperature Sensor

41

opening angle

5

arrow

6

target device

7

Sensor measuring range

8th

holding arm

9

Kabinentor

10

fan

11

heater

12

Swiveling device

13

temperature Object one

14

temperature the injection air

15

conventional course

16

temperature Object two

21

filter ceiling

22

air nozzles

A

Beginning

B

The End

Claims (10)

Drying booth for refinishing vehicles and vehicle parts, in particular for drying in conjunction with water-based paint, with a closed cabin housing ( 1 ), a filter cover ( 21 ), through which air is distributed over the ceiling cross-section directed against the vehicle and sucked off at the cabin floor, with a blower and heating device ( 2 ) for blowing heated air into the cabin for heating and / or drying an object therein ( 3 ), whereby beside the filter cover ( 21 ) Exhaust nozzles ( 22 ) are arranged, by the heated supply air obliquely downwards and against the object ( 3 ), characterized in that a non-contact temperature sensor ( 4 ) in or on the drying and / or painting booth ( 1 ) is provided, which the temperature without contact on the surface of the object to be heated and / or to be dried ( 3 ) and that a control and regulating device is provided which evaluates the signals of the temperature sensor and the blower and heating device ( 2 ) depending on the sensed surface temperature of the object to be heated and / or dried ( 3 ) to achieve a predetermined surface temperature value of the object, the air flow through the purging nozzles being controlled by the control device in dependence on the sensed surface temperature. Drying booth according to claim 1, characterized that the exhaust nozzles are only connected until the preselected surface temperature is reached. Drying booth according to claim 1 or 2, characterized in that the temperature sensor ( 4 ) has a small opening angle for the heat radiation to be received and correspondingly to a small surface portion of the object to be dried ( 3 ) is alignable. Drying booth according to one of claims 1 to 3, characterized in that the temperature sensor ( 4 ) movable ( 5 ) is configured adjustable and as an alignment aid a light or laser beam emitting target device ( 6 ) the temperature sensor ( 4 ), which is so coupled to the temperature sensor, that the light or laser beam substantially centrally in the sensor measuring range defined by the small opening angle ( 7 ) shine. Drying booth according to one of claims 1 to 4, characterized in that the temperature sensor ( 4 ) on a holding arm ( 8th ) inside the cabin ( 1 ) adjustable on the object ( 3 ) is articulated. Drying booth according to one of claims 1 to 5, characterized in that a pivoting device ( 12 ) for the temperature sensor ( 4 ) and / or the alignment aid ( 6 ) is provided wel che in particular by means of a remote control is motor-adjustable. Drying booth according to one of claims 1 to 6, characterized in that the temperature sensor ( 4 ) is formed by an infrared sensor. Drying booth according to one of claims 1 to 7, characterized in that the temperature sensor ( 4 ) is formed by a pyrometer. Drying booth according to one of claims 1 to 8, characterized in that in or on the cabin ( 1 ) a plurality of, in particular, different sides of the temperature sensor to be heated and / or to be dried ( 4 ) are provided. Drying booth according to one of claims 1 to 9, characterized in that a plurality of outlet nozzles ( 13 ) immediately below and next to the filter cover ( 12 ) and are arranged and grouped linearly in opposite rows along the side walls on the ceiling.