EP2604947B1 - Hand-held hot air device with digital control device with universal control element - Google Patents

Hand-held hot air device with digital control device with universal control element Download PDF

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Publication number
EP2604947B1
EP2604947B1 EP12401206.3A EP12401206A EP2604947B1 EP 2604947 B1 EP2604947 B1 EP 2604947B1 EP 12401206 A EP12401206 A EP 12401206A EP 2604947 B1 EP2604947 B1 EP 2604947B1
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EP
European Patent Office
Prior art keywords
hot air
hand
control system
held hot
air device
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
EP12401206.3A
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German (de)
French (fr)
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EP2604947A2 (en
EP2604947A3 (en
Inventor
Stephan Eberli
Bruno Von Wyl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leister Technologies AG
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Leister Technologies AG
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Publication date
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Publication of EP2604947A2 publication Critical patent/EP2604947A2/en
Publication of EP2604947A3 publication Critical patent/EP2604947A3/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/002—Air heaters using electric energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/37—Control of heat-generating means in heaters of electric heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/395—Information to users, e.g. alarms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0423—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between hand-held air guns
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
    • F24H9/2071—Arrangement or mounting of control or safety devices for air heaters using electrical energy supply

Definitions

  • the invention relates to a hot air handler, preferably for local heating of plastic parts or tracks, with a plastic housing having a rod-shaped handle provided with air inlet openings, and with a protruding from the handle part metallic air guide tube which defines an air passage radially, wherein in the air duct electrical heating element and in the handle part, an electric motor with impeller are added, and wherein inside the handle an electronic control for each of the heating element and the electric motor upstream semiconductor power switch and the outside of the handle part, a display panel and an operating device are arranged, wherein the electronic Control as a microprocessor control, the display panel is designed as an electronic digital display and the control device as a digital control device.
  • a hot air device that can produce a continuous air flow with a temperature of at least 300 ° C.
  • Such hot air handlers are known in various embodiments. They are used for example for welding plastic parts or plastic sheets together.
  • WO 84/03552 A1 is a handleable hot air generator for welding or molding of plastic articles disclosed in which a tubular housing serving as a handle is designed as an air duct, which continues in a metal tube extending the housing.
  • the known device has an electrically driven fan for generating a cold air flow and a heating cartridge heated with electricity, which converts the cold air flow into a hot air stream.
  • This hot air handler has a simple electronic control with a thermocouple as a temperature sensor and an analog control, wherein the target temperature is adjustable by means of a calibrated potentiometer having an outwardly guided knob around which extends a printed scale.
  • a conventional on-off switch is provided in the device, which is located directly after the power supply cable.
  • a disadvantage is considered in the known from the prior art hot air handler that the target temperature of the air flow is only roughly adjustable and that the actual temperature of the air flow is not visible. Another disadvantage is that the controller only acts on the heating cartridge and that the fan and the heating cartridge can not be operated and adjusted independently of each other.
  • a hair dryer (hair dryer) with an angled pistol-shaped housing having an air guide tube and a handle orthogonal thereto.
  • an air outlet opening and at a pipe end proximal to the handle are provided on the front side air inlet openings on a handle end remote from the handle, wherein the air duct does not continue in the handle.
  • an electric heating element is arranged at the front, and an electric motor with an impeller is arranged upstream thereof.
  • the hairdryer has a microprocessor control to control, regulate and monitor the amount of air and air temperature, an LCD display to show the current air temperature and the current one Air quantity and a keypad as a digital control device for switching on or off the hair dryer and for setting parameters of the microprocessor control on.
  • the keypad includes a number of individually operable keys with which associated integral with the microprocessor control connected electrical buttons are switchable, the microprocessor control, the LCD display and the keypad are provided in the region of the handle.
  • the present invention seeks to propose an improved hot air handler, in which the power of the electric motor with impeller and the heating element independently of each other with high accuracy adjustable and adjustable, the target and the actual temperature of the air flow and the target Strength of the air flow to be output from the electronic control.
  • the hot air handheld device for generating a hot air flow has an electronic control, which is designed as a microprocessor control, an operating device which is designed as a digital control device and a display panel, which is formed by an electronic digital display.
  • the operating device has only a single universal operating element, which can be used both for switching the device on and off as well as for determining, ie for inputting, control data of the microprocessor control.
  • the universal operating element is movable in at least two directions relative to the handle part. It is axially displaceable and / or rotatable in the circumferential direction in a clockwise or counterclockwise direction.
  • the universal control allows in conjunction with the microprocessor control a digital setting of the speed of the electric motor with impeller, which is henceforth referred to as a fan, and the target temperature of the air flow generated by the fan and heated by the heating element.
  • the current or voltage setting for the heating element is made by the microprocessor of the microprocessor control in response to the deviation of the actual temperature of the target temperature of the hot air flow continuously or in predetermined short time intervals, the actual temperature via a temperature sensor is determined continuously.
  • the electronic display serves to display important, in particular variable process parameters of the microprocessor control. It can display both the setpoint and actual parameters digitally during operation or adjustment of the hot air handler.
  • the universal control element can also be used to query the current settings and any messages from the microprocessor controller. All provided settings and queries of the microprocessor control by means of the single universal control element by being displaced in the axial direction, that is one or more times pressed and / or rotated in a clockwise or counterclockwise direction. By pressing the universal control both the to be changed Parameter selected and their value changed as well as status values of the device queried or special functions of the device are activated.
  • the operating device when operating the universal control element, bridges electrical contacts which transmit digital signals to the microprocessor control.
  • the microprocessor controller selects and / or changes different setting parameters as a function of the operating time of the universal operating element.
  • the microprocessor control can select and / or change different setting parameters as a function of the operating frequency of the universal operating element.
  • the universal control element in the circumferential direction on two directions of rotation, d. H. it is rotatable in a clockwise and counterclockwise direction and selects depending on the direction of rotation of the universal control element different adjustment parameters and / or changes them.
  • the universal control element can have one or more contacting positions in both directions of rotation, wherein the signals forwarded to the microprocessor control for adjusting the operating parameters and / or operating states are dependent on the angle of rotation.
  • the universal control element is formed self-resetting at least in the axial direction.
  • the universal control can be self-resetting or not self-resetting. This depends on whether the universal control is designed in this direction as a bit generator or as a switch. In this way, all operating parameters or operating states of the hot air handler can be easily adjusted. Together with the visualization via the display Even complex settings, adjustment procedures can be clearly displayed and executed.
  • the universal control element can be pressed and / or rotated alone or simultaneously pressed and rotated or swiveled in a clockwise or counterclockwise direction.
  • a variety of mutually distinguishable command inputs can be generated for the microprocessor.
  • the various commands that result in different operations depend on how long the universal control is pressed (duration), how often the printing is done in a predetermined time window (frequency), in which direction the universal control with or without simultaneous pressing is turned (direction of rotation) and how far the universal control element is rotated with or without simultaneous pressing (rotation angle).
  • the microprocessor controller has a software locking function for the operator so that the microprocessor controller does not respond to inadvertent operation of the universal operator. This prevents, during use of the hot air handler according to the invention, the adjustment parameters for the amount of air and air temperature of the hot air stream and the operating conditions of the hot air handler are changed inadvertently in an undesired manner.
  • the universal control To release the software lock, the universal control must be pressed and / or rotated in a particular manner that provides a designated command code.
  • the microprocessor control allows not only a simple control and regulation of the operating state and the set process parameters of the hot air handler, but also a targeted monitoring of functional elements or device functions.
  • the microprocessor control can, for example, monitor the mains voltage applied to the heating element under load with detection means provided for determining the voltage and that of the proper functioning of the heating element and of the fan determine the dependent temperature of the air flow via provided temperature detection means. With such detection means, overheating of the heating element can be reliably detected. By means of further detection means for current and / or voltage optionally provided for the fan or the heating element, their proper function or their failure can be detected and signaled to the user via the electronic display panel.
  • the microprocessor control outputs the desired and actual values of process parameters, deviations of the process parameters from the setting values, messages about specific special operating states as well as warning and / or fault messages via the electronic display.
  • the display next to the air quantity and the temperature display symbols that are activated for example, in software locking of the universal control element, with defective heating element, overheating of the heating element, normal and / or undervoltage to the heating element and due maintenance by the microprocessor ,
  • the microprocessor controller has an energy saving function which can be activated in each case via the universal operating element.
  • Such processor-controlled functions are hitherto unknown from the prior art in hot air handlers. This particular operating condition is also shown in the display as soon as it is executed.
  • Hot air handlers are often used by the user for the same process. For this they are optimally set once and then only switched on and off by means of the universal control element of the operating device. When switching on, the last set process parameters are called again. Many end users sporadically use hot air guns for most of the work task and the hot air handler only for a short period of time to manually machine the machining locations unavailable by the hot air gun. Until a hot air device at power Operating temperature reaches several minutes. Therefore, such hot air handlers are often turned on at the beginning of work and remain in operation until the end of work. While the welding machine is working and / or the user is performing other activities, known hot air handlers consume large amounts of energy during the waiting time, which is undesirable.
  • the microprocessor control in conjunction with the semiconductor circuit breakers connected upstream of the heating element or blower, makes it possible to specifically change the amount of air delivered by the blower and / or the operating temperature of the heating element for generating the hot air flow. If the desired operating temperature is reached and then the air volume is reset, the process temperature is changed only slightly during the balancing process due to the heat capacity of the heating element. In this case, the energy consumption of the heating element can also be lowered because the heating element only has to heat the reduced amount of air.
  • the hot air hand-held device is no longer needed, overheating of the heating element can be avoided when decommissioning via the cooling function.
  • the cooling function is activated, the heating element is switched off microprocessor-controlled while the fan is still running and thus cooling.
  • the follow-up time of the blower can be predetermined, d. H. stored in the microprocessor or sensor-controlled.
  • the activated cooling function is signaled to the user via the electronic display. After expiry of the run-on time, the new hot air hand-held device automatically switches off automatically and also locks the entry of commands via the universal control element in software.
  • microprocessor controller can output setpoint and actual values of process parameters, special device functions, warning messages and / or fault messages and also maintenance instructions and visualize them via the display.
  • the microprocessor control on a start-up lock function which can be influenced via the universal control element.
  • the start-up lock function prevents an independent start-up of the hot air handler when applying operating voltage.
  • the semiconductor circuit breakers to control the performance of the fan and heating element, it is possible for the microprocessor of the hot air handler to turn it on and off.
  • the air flow is only generated and heated after the user has lifted the lock by a deliberate input to the universal control element. This is a safety advantage for preventing fires after power failures compared to devices that are designed with a main switch.
  • FIG. 1 shows the embodiment of the invention as an overview drawing, the FIG. 2 the back end of the in the FIG. 1 illustrated embodiment in an enlarged view.
  • the hot air handler 1 according to the invention has a rod-shaped handle part 2 with air inlet openings 3, which is designed as a plastic housing (2 ').
  • the air inlet openings 3 are arranged at the rear on the handle part 2.
  • From the handle part 2 enters the front of a metallic air duct 4 shows that at the end facing away from the handle part 2 an air outlet opening 5, extending from the air inlet openings 3 to the air outlet opening 5 in the interior of the housing (2 ') and the air duct 4 a extends in these figures not visible air duct.
  • the cylindrical handle part 2 has a likewise cylindrical front housing section 6, which is, however, substantially larger in diameter than the rear housing section 7 of the handle part 2.
  • an electric motor with impeller and in the air duct 4 to the fan then arranged an electric heating element, which are not visible in the drawing.
  • a likewise invisible microprocessor control is installed, each with a semiconductor power switch connected upstream of the heating element and the electric motor.
  • the microprocessor of the microprocessor control is electrically connected to an electronic digital display panel 9 in the form of a display 9 and with an operating device 10, which are arranged at the rear of the rear housing section 7 of the handle part 2 and visible from the outside.
  • the operating device 10 has a single universal operating element 10 ', which is designed as a substantially cylindrical control knob, and which protrudes from the handle part 2.
  • the universal operating element 10 ' is arranged on the rear end face 8 of the grip part 2, on which the power cable 11 also enters the rear housing section 7 of the grip part 2.
  • the display 9 is also on the rear housing portion 7 of the handle part 2 near the rear end side 8, However, arranged circumferentially, where the air inlet openings 3 of the air duct are positioned.
  • FIG. 2 shown as a detail enlargement universal control element 10 ', are supplied to the digital inputs to the microprocessor as commands, is axially displaceable for inputting control data and rotatable in the circumferential direction.
  • the operating device 10 bridges upon actuation of the universal control element 10 'electrical contacts that are connected to the microprocessor and transmits digital signals there.
  • FIGS. 3a-3c show the intended different operation possibilities of the universal control element 10 '.
  • the universal control element 10 ' is formed in the axial direction as a button, like the FIGS. 3a, 3b show symbolically.
  • the operating device 10 which can be actuated by means of the universal operating element 10 'emits different digital signals for setting the operating state or operating parameters of the hot air handler 1 as a function of the axial operating time. It also outputs other signals depending on the frequency of the axial actuation in a specific time window for setting the hot air handler 1.
  • the universal control element 10 in both possible directions of rotation in the circumferential direction rotatable. Also, depending on the direction of rotation or the angle of rotation, the universal control element outputs other different types of signals for setting other operating states or operating parameters of the hot air handler 1 to the microprocessor control. In addition, the combination of tactile and rotary movements again leads to a different command sequence.
  • the FIG. 4 shows the electronic digital display 9 of the hot air handler 1 in an enlarged view.
  • the display 9 has centrally a three-and-a-half digit 7-segment display 12 for the temperature input and display.
  • a 5-segment bar display 14 for setting or displaying the amount of air.
  • Above and to the left of the three-digit 7-segment temperature display 12 are connected to a number of function symbols 14 arranged, can be visualized via the warning messages, fault messages or certain special operating conditions of the hot air handler 1.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Air Conditioning Control Device (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Description

Die Erfindung betrifft ein Heißlufthandgerät, vorzugsweise zur lokalen Erhitzung von Kunststoffteilen oder -bahnen, mit einem Kunststoffgehäuse, das ein stabförmiges mit Lufteintrittsöffnungen versehenes Griffteil aufweist, und mit einem aus dem Griffteil hervortretenden metallischen Luftführungsrohr, das einen Luftkanal radial begrenzt, wobei in dem Luftführungsrohr ein elektrisches Heizelement und in dem Griffteil ein Elektromotor mit Gebläserad aufgenommen sind, und wobei innen in dem Griffteil eine elektronische Steuerung für jeweils einen dem Heizelement und dem Elektromotor vorgeschalteten Halbleiter-Leistungsschalter und außen an dem Griffteil ein Anzeigefeld sowie eine Bedieneinrichtung angeordnet sind, wobei die elektronische Steuerung als Mikroprozessor-Steuerung, das Anzeigefeld als elektronisches digitales Display und die Bedieneinrichtung als digitale Bedieneinrichtung ausgebildet ist. Dabei handelt es sich insbesondere um ein Heißluftgerät, das einen kontinuierlichen Luftstrom mit einer Temperatur von mindestens 300° C erzeugen kann.The invention relates to a hot air handler, preferably for local heating of plastic parts or tracks, with a plastic housing having a rod-shaped handle provided with air inlet openings, and with a protruding from the handle part metallic air guide tube which defines an air passage radially, wherein in the air duct electrical heating element and in the handle part, an electric motor with impeller are added, and wherein inside the handle an electronic control for each of the heating element and the electric motor upstream semiconductor power switch and the outside of the handle part, a display panel and an operating device are arranged, wherein the electronic Control as a microprocessor control, the display panel is designed as an electronic digital display and the control device as a digital control device. This is in particular a hot air device that can produce a continuous air flow with a temperature of at least 300 ° C.

Derartige Heißlufthandgeräte sind in vielfältigen Ausführungsformen bekannt. Sie werden beispielsweise zum Verschweißen von Kunststoffteilen oder Kunststoffbahnen miteinander verwendet. In der Druckschrift WO 84/03552 A1 ist ein handführbarer Heißlufterzeuger zum Schweißen oder Formen von Kunststoffartikeln offenbart, bei dem ein als Handgriff dienendes rohrartiges Gehäuse als Luftkanal ausgebildet ist, der sich in einem das Gehäuse verlängernden Metallrohr fortsetzt. Das bekannte Gerät weist ein elektrisch angetriebenes Gebläse zur Erzeugung eines Kaltluftstromes sowie eine mit Strom beheizte Heizpatrone auf, die den Kaltluftstrom in einen Heißluftstrom wandelt. Dieses Heißlufthandgerät weist eine einfache elektronische Steuerung mit einem Thermoelement als Temperatursensor sowie eine analoge Regelung auf, wobei die Solltemperatur mittels eines kalibrierten Potentiometers einstellbar ist, das einen nach außen geführten Drehknopf aufweist, um den herum sich eine aufgedruckte Skala erstreckt. Außerdem ist bei dem Gerät ein konventioneller Ein-Aus-Schalter vorgesehen, der direkt nach dem Netzzuführungskabel angeordnet ist.Such hot air handlers are known in various embodiments. They are used for example for welding plastic parts or plastic sheets together. In the publication WO 84/03552 A1 is a handleable hot air generator for welding or molding of plastic articles disclosed in which a tubular housing serving as a handle is designed as an air duct, which continues in a metal tube extending the housing. The known device has an electrically driven fan for generating a cold air flow and a heating cartridge heated with electricity, which converts the cold air flow into a hot air stream. This hot air handler has a simple electronic control with a thermocouple as a temperature sensor and an analog control, wherein the target temperature is adjustable by means of a calibrated potentiometer having an outwardly guided knob around which extends a printed scale. In addition, a conventional on-off switch is provided in the device, which is located directly after the power supply cable.

Als nachteilig wird bei dem aus dem Stand der Technik bekannten Heißlufthandgerät angesehen, dass die Solltemperatur des Luftstroms nur grob einstellbar ist und dass die Ist-Temperatur des Luftstroms nicht erkennbar ist. Ein weiterer Nachteil ist, dass die Steuerung nur auf die Heizpatrone einwirkt und dass das Gebläse und die Heizpatrone nicht unabhängig voneinander betrieben und eingestellt werden können.A disadvantage is considered in the known from the prior art hot air handler that the target temperature of the air flow is only roughly adjustable and that the actual temperature of the air flow is not visible. Another disadvantage is that the controller only acts on the heating cartridge and that the fan and the heating cartridge can not be operated and adjusted independently of each other.

Zum Stand der Technik wird weiterhin auf die Druckschrift ES 2 315 072 A1 verwiesen, Diese offenbart einen Haartrockner (Fön) mit einem abgewinkelten pistolenförmigen Gehäuse, das ein Luftführungsrohr und einen orthogonal dazu angeordneten Handgriff aufweist. An dem Luftführungsrohr sind an einem dem Handgriff fernen Rohrende eine Luftaustrittsöffnung und an einem dem Handgriff nahen Rohrende stirnseitig Lufteintrittsöffnungen vorgesehen, wobei sich der Luftkanal nicht in dem Handgriff fortsetzt. In dem Luftführungsrohr ist vorne ein elektrisches Heizelement und stromaufwärts davon ein Elektromotor mit Gebläserad angeordnet. Der Haartrockner weist eine Mikroprozessorsteuerung zum Steuern, Regeln und Überwachen der Luftmenge und der Lufttemperatur, eine LCD-Anzeige zum Anzeigen der aktuellen Lufttemperatur und der aktuellen Luftmenge sowie ein Tastenfeld als digitale Bedieneinrichtung zum Ein- oder Ausschalten des Haartrockners und zur Festlegung von Einstellparametern der Mikroprozessorsteuerung auf. Das Tastenfeld umfasst eine Anzahl von einzeln betätigbaren Tasten, mit denen zugeordnete integrierte mit der Mikroprozessorsteuerung verbundene elektrische Taster schaltbar sind, wobei die Mikroprozessorsteuerung, die LCD-Anzeige und das Tastenfeld im Bereich des Handgriffes vorgesehen sind.The prior art will continue to the document ES 2 315 072 A1 This discloses a hair dryer (hair dryer) with an angled pistol-shaped housing having an air guide tube and a handle orthogonal thereto. At the air duct tube, an air outlet opening and at a pipe end proximal to the handle are provided on the front side air inlet openings on a handle end remote from the handle, wherein the air duct does not continue in the handle. In the air guide tube, an electric heating element is arranged at the front, and an electric motor with an impeller is arranged upstream thereof. The hairdryer has a microprocessor control to control, regulate and monitor the amount of air and air temperature, an LCD display to show the current air temperature and the current one Air quantity and a keypad as a digital control device for switching on or off the hair dryer and for setting parameters of the microprocessor control on. The keypad includes a number of individually operable keys with which associated integral with the microprocessor control connected electrical buttons are switchable, the microprocessor control, the LCD display and the keypad are provided in the region of the handle.

Davon ausgehend liegt der Erfindung die Aufgabe zugrunde, ein verbessertes Heißlufthandgerät vorzuschlagen, bei dem die Leistung des Elektromotors mit Gebläserad und des Heizelementes unabhängig voneinander mit hoher Genauigkeit einstellbar und regelbar ist, wobei die Soll- und die Ist-Temperatur des Luftstromes sowie die Soll-Stärke des Luftstromes von der elektronischen Steuerung ausgegeben werden soll.On this basis, the present invention seeks to propose an improved hot air handler, in which the power of the electric motor with impeller and the heating element independently of each other with high accuracy adjustable and adjustable, the target and the actual temperature of the air flow and the target Strength of the air flow to be output from the electronic control.

Diese Aufgabe wird erfindungsgemäß durch ein Heißlufthandgerät mit den Merkmalen des unabhängigen Anspruchs 1 gelöst. Weitere vorteilhafte Ausgestaltungen sind den rückbezogenen Ansprüchen zu entnehmen.This object is achieved by a hot air handler with the features of independent claim 1. Further advantageous embodiments can be found in the dependent claims.

Das erfindungsgemäße Heißlufthandgerät zur Erzeugung eines Heißluftstromes weist eine elektronische Steuerung auf, die als Mikroprozessor-Steuerung ausgeführt ist, eine Bedieneinrichtung die als digitale Bedieneinrichtung konzipiert ist sowie ein Anzeigefeld, das von einem elektronischen digitalen Display gebildet ist. Erfindungsgemäß weist die Bedieneinrichtung nur ein einziges Universal-Bedienelement auf, das sowohl zum Ein- und Ausschalten des Gerätes als auch zur Festlegung, d. h. zur Eingabe von Steuerdaten der Mikroprozessor-Steuerung verwendbar ist. Das Universal-Bedienelement ist in mindestens zwei Richtungen gegenüber dem Griffteil bewegbar ist. Es ist axial verschiebbar und/oder in Umfangsrichtung im Uhrzeigersinn bzw. entgegen dem Uhrzeigersinn drehbar. Das Universal-Bedienelement ermöglicht in Verbindung mit der Mikroprozessor-Steuerung eine digitale Einstellung der Drehzahl des Elektromotors mit Gebläserad, der fortan als Gebläse bezeichnet wird, und der Soll-Temperatur des von dem Gebläse erzeugten und vom dem Heizelement aufgeheizten Luftstromes. Die Strom- bzw. Spannungseinstellung für das Heizelement wird von dem Mikroprozessor der Mikroprozessor-Steuerung in Abhängigkeit von der Abweichung der Ist-Temperatur von der Soll-Temperatur des Heißluftstromes kontinuierlich oder in vorgegebenen kurzen Zeitabständen neu vorgenommen, wobei die Ist-Temperatur über einen Temperatursensor fortlaufend ermittelt wird. Das elektronische Display dient zur Anzeige von wichtigen, insbesondere veränderbaren Prozess-Parametern der Mikroprozessor-Steuerung. Es kann sowohl die Soll- wie auch die Ist-Parameter während dem Betrieb bzw. der Einstellung des Heißlufthandgerätes digital anzeigen. Es weist beispielsweise eine dreieinhalbstellige 7-Segment-Anzeige für die Soll- oder Ist-Temperaturanzeige des Heißluftstromes, eine 5-Segment-Balken-Anzeige für die Einstellung bzw. Anzeige der Gebläsedrehzahl sowie eine Anzahl von Symbolen zur Funktionsanzeige auf. Über das Universal-Bedienelement können auch die aktuellen Einstellungen und etwaige Meldungen der Mikroprozessor-Steuerung abgefragt werden. Alle vorgesehenen Einstellungen und Abfragen der Mikroprozessor-Steuerung erfolgen mittels dem einzigen Universal-Bedienelement, indem es in axialer Richtung verschoben, d. h. ein oder mehrmals gedrückt und/oder im Uhrzeiger- bzw. Gegenuhrzeigersinn gedreht wird. Durch die Betätigung des Universal-Bedienelementes können sowohl die zu verändernden Parameter ausgewählt und in ihrem Wert verändert wie auch Statuswerte des Gerätes abgefragt bzw. Sonderfunktionen des Gerätes aktiviert werden.The hot air handheld device according to the invention for generating a hot air flow has an electronic control, which is designed as a microprocessor control, an operating device which is designed as a digital control device and a display panel, which is formed by an electronic digital display. According to the invention, the operating device has only a single universal operating element, which can be used both for switching the device on and off as well as for determining, ie for inputting, control data of the microprocessor control. The universal operating element is movable in at least two directions relative to the handle part. It is axially displaceable and / or rotatable in the circumferential direction in a clockwise or counterclockwise direction. The universal control allows in conjunction with the microprocessor control a digital setting of the speed of the electric motor with impeller, which is henceforth referred to as a fan, and the target temperature of the air flow generated by the fan and heated by the heating element. The current or voltage setting for the heating element is made by the microprocessor of the microprocessor control in response to the deviation of the actual temperature of the target temperature of the hot air flow continuously or in predetermined short time intervals, the actual temperature via a temperature sensor is determined continuously. The electronic display serves to display important, in particular variable process parameters of the microprocessor control. It can display both the setpoint and actual parameters digitally during operation or adjustment of the hot air handler. It has, for example, a three-and-a-half-digit 7-segment display for the set or actual temperature display of the hot air flow, a 5-segment bar display for setting or display of the fan speed and a number of symbols for the function display. The universal control element can also be used to query the current settings and any messages from the microprocessor controller. All provided settings and queries of the microprocessor control by means of the single universal control element by being displaced in the axial direction, that is one or more times pressed and / or rotated in a clockwise or counterclockwise direction. By pressing the universal control both the to be changed Parameter selected and their value changed as well as status values of the device queried or special functions of the device are activated.

Vorzugsweise überbrückt die Bedieneinrichtung beim betätigen des Universal-Bedienelements elektrische Kontakte, die digitale Signale zu der Mikroprozessor-Steuerung übertragen.Preferably, when operating the universal control element, the operating device bridges electrical contacts which transmit digital signals to the microprocessor control.

Bei einer bevorzugten Ausführungsform der Erfindung wählt die Mikroprozessor-Steuerung in Abhängigkeit von der Betätigungsdauer des Universal-Bedienelementes unterschiedliche Einstellparameter aus und/oder verändert diese. Alternativ oder zusätzlich kann die Mikroprozessor-Steuerung bei einer weiteren Ausführungsform des erfindungsgemäßen Heißlufthandgerätes unterschiedliche Einstellparameter in Abhängigkeit von der Betätigungshäufigkeit des Universal-Bedienelementes auswählen und/oder verändern.In a preferred embodiment of the invention, the microprocessor controller selects and / or changes different setting parameters as a function of the operating time of the universal operating element. Alternatively or additionally, in another embodiment of the hot air handheld device according to the invention, the microprocessor control can select and / or change different setting parameters as a function of the operating frequency of the universal operating element.

Vorzugsweise weist das Universal-Bedienelement in Umfangsrichtung zwei Drehrichtungen auf, d. h. es ist im Uhrzeigersinn und im Gegenuhrzeigersinn drehbar und wählt in Abhängigkeit von der Drehrichtung des Universal-Bedienelementes unterschiedliche Einstellparameter aus und/oder verändert diese. Dabei kann das Universal-Bedienelement in beiden Drehrichtungen ein oder mehrere Kontaktierstellungen aufweisen, wobei die an die Mikroprozessor-Steuerung weiter geleiteten Signale zur Einstellung der Betriebsparameter und/oder Betriebszustände vom Drehwinkel abhängig sind.Preferably, the universal control element in the circumferential direction on two directions of rotation, d. H. it is rotatable in a clockwise and counterclockwise direction and selects depending on the direction of rotation of the universal control element different adjustment parameters and / or changes them. In this case, the universal control element can have one or more contacting positions in both directions of rotation, wherein the signals forwarded to the microprocessor control for adjusting the operating parameters and / or operating states are dependent on the angle of rotation.

Für eine einfache Bedienung des erfindungsgemäßen Heißlufthandgerätes hat es sich als günstig erwiesen, wenn das Universal-Bedienelement zumindest in axialer Richtung selbstrückstellend ausgebildet ist. In Drehrichtung kann das Universal-Bedienelement selbstrückstellend oder nicht selbstrückstellend ausgebildet sein. Dies ist abhängig davon, ob das Universal-Bedienelement in dieser Richtung als Bit-Generator oder als Schalter konzipiert ist. Auf diese Weise können alle Betriebsparameter bzw. Betriebszustände des Heißlufthandgerätes einfach eingestellt werden. Zusammen mit der Visualisierung über das Display können selbst komplexe Einstellungs-, Anpassungs- Vorgänge verständlich dargestellt und ausgeführt werden.For a simple operation of the hot air hand-held device according to the invention, it has proven to be advantageous if the universal control element is formed self-resetting at least in the axial direction. In the direction of rotation, the universal control can be self-resetting or not self-resetting. This depends on whether the universal control is designed in this direction as a bit generator or as a switch. In this way, all operating parameters or operating states of the hot air handler can be easily adjusted. Together with the visualization via the display Even complex settings, adjustment procedures can be clearly displayed and executed.

Dabei kann das Universal-Bedienelement allein gedrückt und/oder gedreht werden oder gleichzeitig gedrückt und im Uhrzeigersinn oder entgegen dem Uhrzeigersinn gedreht bzw. geschwenkt werden. Durch die Kombination dieser beiden Bewegungsarten lässt sich eine Vielzahl von voneinander unterscheidbaren Befehlseingaben für den Mikroprozessor generieren. Die verschiedenen Befehle, die zu unterschiedlichen Vorgängen führen, sind abhängig davon, wie lange auf das Universal-Bedienelement gedrückt wird (Dauer), wie oft die Druckvorgänge in einem vorbestimmten Zeitfenster erfolgen (Häufigkeit), in welcher Richtung das Universal-Bedienelement mit oder ohne gleichzeitiges Drücken gedreht wird (Drehsinn) und wie weit das Universal-Bedienelement mit oder ohne gleichzeitige Drücken gedreht wird (Drehwinkel).In this case, the universal control element can be pressed and / or rotated alone or simultaneously pressed and rotated or swiveled in a clockwise or counterclockwise direction. By combining these two types of motion, a variety of mutually distinguishable command inputs can be generated for the microprocessor. The various commands that result in different operations depend on how long the universal control is pressed (duration), how often the printing is done in a predetermined time window (frequency), in which direction the universal control with or without simultaneous pressing is turned (direction of rotation) and how far the universal control element is rotated with or without simultaneous pressing (rotation angle).

In einer begünstigten Ausführungsform der Erfindung weist die Mikroprozessor-Steuerung eine Software-Verriegelungsfunktion für die Bedieneinrichtung auf, so dass die Mikroprozessor-Steuerung nicht auf eine versehentliche Betätigung des Universal-Bedienelements reagiert. Diese verhindert, dass während des Gebrauchs des erfindungsgemäßen Heißlufthandgerätes die Einstellparameter für die Luftmenge und Lufttemperatur des Heißluftstroms sowie die Betriebszustände des Heißlufthandgerätes in unerwünschter Weise versehentlich geändert werden. Zum Lösen der Softwareverriegelung muss das Universal-Bedienelement in einer bestimmten Weise, die einen vorgesehenen Befehlscode bewirkt, gedrückt und/oder gedreht werden.In a preferred embodiment of the invention, the microprocessor controller has a software locking function for the operator so that the microprocessor controller does not respond to inadvertent operation of the universal operator. This prevents, during use of the hot air handler according to the invention, the adjustment parameters for the amount of air and air temperature of the hot air stream and the operating conditions of the hot air handler are changed inadvertently in an undesired manner. To release the software lock, the universal control must be pressed and / or rotated in a particular manner that provides a designated command code.

Die Mikroprozessor-Steuerung ermöglicht nicht nur eine einfache Steuerung und Regelung des Betriebszustandes und der eingestellten Prozessparameter des Heißlufthandgerätes, sondern auch eine gezielte Überwachung von Funktionselementen bzw. von Gerätefunktionen. Die Mikroprozessor-Steuerung kann beispielsweise die an dem Heizelement unter Last anliegende Netzspannung mit zur Spannungsbestimmung vorgesehenen Detektionsmitteln überwachen und die von der ordnungsgemäßen Funktion des Heizelementes und des Gebläses abhängige Temperatur des Luftstroms über vorgesehene Temperaturdetektionsmittel bestimmen. Mit derartigen Detektionsmitteln kann auch eine Überhitzung des Heizelementes sicher erkannt werden. Über weitere für das Gebläse bzw. das Heizelement optional vorgesehene Detektionsmittel für Strom- und/oder Spannung kann deren ordnungsgemäße Funktion oder deren Ausfall erkannt und dem Benutzer über das elektronische Anzeigefeld signalisiert werden. Die Mikroprozessor-Steuerung gibt zur Information des Benutzers des Heißlufthandgerätes die Soll- und Ist-Werte von Prozessparametern, Abweichungen der Prozessparameter von den Einstellwerten, Meldungen zu bestimmten Sonderbetriebszuständen sowie Warn- und/oder Störmeldungen über das elektronische Display aus. Dazu weist das Display neben der Luftmengen- und der Temperaturanzeige Symbole auf, die beispielsweise bei SoftwareVerriegelung des Universal-Bedienelements, bei defektem Heizelement, bei Überhitzung des Heizelementes, bei normal- und/oder Unterspannung am Heizelement sowie bei fälligen Wartungsarbeiten von dem Mikroprozessor aktiviert werden.The microprocessor control allows not only a simple control and regulation of the operating state and the set process parameters of the hot air handler, but also a targeted monitoring of functional elements or device functions. The microprocessor control can, for example, monitor the mains voltage applied to the heating element under load with detection means provided for determining the voltage and that of the proper functioning of the heating element and of the fan determine the dependent temperature of the air flow via provided temperature detection means. With such detection means, overheating of the heating element can be reliably detected. By means of further detection means for current and / or voltage optionally provided for the fan or the heating element, their proper function or their failure can be detected and signaled to the user via the electronic display panel. For the information of the user of the hot air handheld device, the microprocessor control outputs the desired and actual values of process parameters, deviations of the process parameters from the setting values, messages about specific special operating states as well as warning and / or fault messages via the electronic display. For this purpose, the display next to the air quantity and the temperature display symbols that are activated, for example, in software locking of the universal control element, with defective heating element, overheating of the heating element, normal and / or undervoltage to the heating element and due maintenance by the microprocessor ,

Bei vorteilhaften Varianten des vorgeschlagenen Heißlufthandgerätes weist die Mikroprozessor-Steuerung eine Energiesparfunktion auf, die jeweils über das Universal-Bedienelement aktivierbar ist. Derartige prozessorgesteuerte Funktionen sind aus dem Stand der Technik bei Heißlufthandgeräten bisher nicht bekannt. Dieser besondere Betriebszustand wird ebenfalls im Display angezeigt, sobald er ausgeführt wird.In advantageous variants of the proposed hot air handler, the microprocessor controller has an energy saving function which can be activated in each case via the universal operating element. Such processor-controlled functions are hitherto unknown from the prior art in hot air handlers. This particular operating condition is also shown in the display as soon as it is executed.

Heißlufthandgeräte werden vom Anwender oft für denselben Prozess verwendet. Dazu werden sie einmalig optimal eingestellt und dann nur noch mit mittels des Universal-Bedienelementes der Bedieneinrichtung ein- und ausgeschaltet. Beim Einschalten werden dann die zuletzt eingestellten Prozessparameter wieder aufgerufen. Viele Endanwender verwenden Heißluftautomaten für den wesentlichen Teil der Arbeitsaufgabe und das Heißlufthandgerät nur für kurze Zeit sporadisch, um die von dem Heißluftautomaten nicht erreichbaren Bearbeitungsstellen manuell zu bearbeiten. Bis ein Heißluftgerät beim Einschalten die Betriebstemperatur erreicht, können mehrere Minuten verstreichen. Daher werden häufig solche Heißlufthandgeräte bei Arbeitsbeginn eingeschaltet und bleiben dauernd im Betrieb bis zum Arbeitsende. Während der Schweißautomat arbeitet und/oder der Anwender andere Tätigkeiten ausführt, verbrauchen bekannte Heißlufthandgeräte während der Wartezeit große Energiemengen, was unerwünscht ist. Die Mikroprozessor-Steuerung bietet in Verbindung mit den dem Heizelement bzw. dem Gebläse vorgeschalteten Halbleiter-Leistungsschaltern die Möglichkeit, die vom Gebläse geförderte Luftmenge und/oder die Betriebstemperatur des Heizelementes zur Erzeugung des Heißluftstromes gezielt zu verändern. Ist die gewünschte Betriebstemperatur erreicht und wird dann die Luftmenge neu eingestellt, wird die Prozesstemperatur aufgrund der Wärmekapazität des Heizelementes während dem Ausregeln nur wenig verändert. Dabei kann der Energieverbrauch des Heizelementes ebenfalls abgesenkt werden, da das Heizelement nur die reduzierte Luftmenge erwärmen muss.Hot air handlers are often used by the user for the same process. For this they are optimally set once and then only switched on and off by means of the universal control element of the operating device. When switching on, the last set process parameters are called again. Many end users sporadically use hot air guns for most of the work task and the hot air handler only for a short period of time to manually machine the machining locations unavailable by the hot air gun. Until a hot air device at power Operating temperature reaches several minutes. Therefore, such hot air handlers are often turned on at the beginning of work and remain in operation until the end of work. While the welding machine is working and / or the user is performing other activities, known hot air handlers consume large amounts of energy during the waiting time, which is undesirable. The microprocessor control, in conjunction with the semiconductor circuit breakers connected upstream of the heating element or blower, makes it possible to specifically change the amount of air delivered by the blower and / or the operating temperature of the heating element for generating the hot air flow. If the desired operating temperature is reached and then the air volume is reset, the process temperature is changed only slightly during the balancing process due to the heat capacity of the heating element. In this case, the energy consumption of the heating element can also be lowered because the heating element only has to heat the reduced amount of air.

Wird das Heißlufthandgerät nicht mehr benötigt, kann bei der Außerbetriebnahme über die Auskühlfunktion eine Überhitzung des Heizelementes vermieden werden. Bei aktivierter Auskühlfunktion wird das Heizelement Mikroprozessorgesteuert abgeschaltet, während das Gebläse noch nachläuft und so kühlt. Die Nachlaufzeit des Gebläses kann vorbestimmt, d. h. im Mikroprozessor gespeichert oder sensorgesteuert sein. Die aktivierte Auskühlfunktion wird dem Benutzer über das elektronische Display signalisiert. Nach dem Ablauf der Nachlaufzeit schaltet sich das neue Heißlufthandgerät automatisch selbstständig vollkommen ab und verriegelt zudem softwaremäßig die Eingabe von Befehlen über das Universal-Bedienelement.If the hot air hand-held device is no longer needed, overheating of the heating element can be avoided when decommissioning via the cooling function. When the cooling function is activated, the heating element is switched off microprocessor-controlled while the fan is still running and thus cooling. The follow-up time of the blower can be predetermined, d. H. stored in the microprocessor or sensor-controlled. The activated cooling function is signaled to the user via the electronic display. After expiry of the run-on time, the new hot air hand-held device automatically switches off automatically and also locks the entry of commands via the universal control element in software.

Außerdem kann die Mikroprozessor-Steuerung Soll- und Ist-Werte von Prozessparametern, besondere Gerätefunktionen, Warnmeldungen und/oder Störmeldungen und auch Wartungsanweisungen ausgeben und über das Display visualisieren.In addition, the microprocessor controller can output setpoint and actual values of process parameters, special device functions, warning messages and / or fault messages and also maintenance instructions and visualize them via the display.

In einer bevorzugten Ausführungsform der Erfindung weist die MikroprozessorSteuerung eine Anlaufsperrfunktion auf, die über das Universal-Bedienelement beeinflussbar ist. Die Anlaufsperrfunktion verhindert einen selbstständigen Anlauf des Heißlufthandgerätes beim Anlegen von Betriebsspannung. Durch die Verwendung der Halbleiter-Leistungsschalter für die Kontrolle der Leistung des Gebläses und des Heizelementes ist es dem Mikroprozessor des Heißlufthandgerätes möglich, diese definiert ein- und auch auszuschalten. Wenn das Gerät an die Betriebsspannung verbunden wird oder wenn die Betriebsspannung nach Netzausfall wieder zur Verfügung steht, wird der Luftstrom erst erzeugt und erhitzt, nachdem der Anwender durch eine bewusste Eingabe am Universal-Bedienelement die Sperre aufgehoben hat. Dies ist ein sicherheitstechnischer Vorteil zur Verhütung von Bränden nach Netzausfällen gegenüber Geräten, welche mit einem Hauptschalter ausgeführt sind.In a preferred embodiment of the invention, the microprocessor control on a start-up lock function, which can be influenced via the universal control element. The start-up lock function prevents an independent start-up of the hot air handler when applying operating voltage. By using the semiconductor circuit breakers to control the performance of the fan and heating element, it is possible for the microprocessor of the hot air handler to turn it on and off. When the device is connected to the operating voltage or when the operating voltage is available again after a power failure, the air flow is only generated and heated after the user has lifted the lock by a deliberate input to the universal control element. This is a safety advantage for preventing fires after power failures compared to devices that are designed with a main switch.

Nachfolgend wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Weitere Merkmale der Erfindung ergeben sich aus der folgenden Beschreibung des Ausführungsbeispiels zur Erfindung in Verbindung mit den Ansprüchen und der beigefügten Zeichnung. Die einzelnen Merkmale der Erfindung können für sich allein oder zu mehreren bei unterschiedlichen Ausführungsformen der Erfindung verwirklicht sein. Es zeigen:

Figur 1
ein erfindungsgemäßes Heißlufthandgerät in perspektivischer Darstellung mit Blickrichtung von hinten auf das Griffteil;
Figur 2
das Universal-Bedienelement aus Figur 2 als Ausschnittsvergrößerung;
Figur 3
die unterschiedlichen Betätigungsmöglichkeiten des UniversalBedienelements aus Figur 2 (Figur 3a bis 3c);und
Figur 4
das elektronische Display aus Figur 2 als Ausschnittsvergrößerung.
The invention will be explained in more detail with reference to an embodiment shown in the drawing. Further features of the invention will become apparent from the following description of the embodiment of the invention in conjunction with the claims and the accompanying drawings. The individual features of the invention may be implemented on their own or in several different embodiments of the invention. Show it:
FIG. 1
an inventive hot air handler in a perspective view with a view from the rear of the handle part;
FIG. 2
the universal control FIG. 2 as a detail enlargement;
FIG. 3
the different operating possibilities of the universal control element FIG. 2 ( FIGS. 3a to 3c );and
FIG. 4
the electronic display off FIG. 2 as a detail enlargement.

Die Figur 1 zeigt das Ausführungsbeispiel der Erfindung als Übersichtszeichnung, die Figur 2 das hintere Ende des in der Figur 1 dargestellten Ausführungsbeispiels in vergrößerter Darstellung. Das erfindungsgemäße Heißlufthandgerät 1 weist ein stabförmiges Griffteil 2 mit Lufteintrittsöffnungen 3 auf, das als Kunststoffgehäuse (2') ausgebildet ist. Die Lufteinrittsöffnungen 3 sind hinten an dem Griffteil 2 angeordnet. Aus dem Griffteil 2 tritt vorne ein metallisches Luftführungsrohr 4 hervor, das an dem dem Griffteil 2 abgewandten Ende eine Luftaustrittsöffnung 5 aufweist, wobei sich von den Lufteintrittsöffnungen 3 bis hin zu der Luftaustrittsöffnung 5 im inneren des Gehäuses (2') und des Luftführungsrohres 4 ein in diesen Figuren nicht sichtbarer Luftkanal erstreckt. Am Übergang zu dem Luftführungsrohr 4 weist das zylindrische Griffteil 2 einen ebenfalls zylindrischen vorderen Gehäuseabschnitt 6 auf, der im Durchmesser jedoch wesentlich größer ist als der hintere Gehäuseabschnitt 7 des Griffteils 2. In dem Griffteil 2 ist im Bereich des vorderen Gehäuseabschnittes 6 ein Elektromotor mit Gebläserad und in dem Luftführungsrohr 4 an das Gebläse anschließend ein elektrisches Heizelement angeordnet, die in der Zeichnung nicht sichtbar sind.The FIG. 1 shows the embodiment of the invention as an overview drawing, the FIG. 2 the back end of the in the FIG. 1 illustrated embodiment in an enlarged view. The hot air handler 1 according to the invention has a rod-shaped handle part 2 with air inlet openings 3, which is designed as a plastic housing (2 '). The air inlet openings 3 are arranged at the rear on the handle part 2. From the handle part 2 enters the front of a metallic air duct 4 shows that at the end facing away from the handle part 2 an air outlet opening 5, extending from the air inlet openings 3 to the air outlet opening 5 in the interior of the housing (2 ') and the air duct 4 a extends in these figures not visible air duct. At the transition to the air duct 4, the cylindrical handle part 2 has a likewise cylindrical front housing section 6, which is, however, substantially larger in diameter than the rear housing section 7 of the handle part 2. In the handle part 2 is in the region of the front housing section 6, an electric motor with impeller and in the air duct 4 to the fan then arranged an electric heating element, which are not visible in the drawing.

Außerdem ist zwischen dem Gebläse und der hinteren Stirnseite 8 des Griffteils 2 eine ebenfalls nicht sichtbare Mikroprozessor-Steuerung mit jeweils einem dem Heizelement und dem Elektromotor vorgeschalteten Halbleiter-Leistungsschalter eingebaut. Der Mikroprozessor der Mikroprozessor-Steuerung ist mit einem elektronischen digitalen Anzeigefeld 9 in Form eines Displays 9 und mit einer Bedieneinrichtung 10 elektrisch verbunden, die hinten am hinteren Gehäuseabschnitt 7 des Griffteils 2 angeordnet und von außen sichtbar bzw. bedienbar sind. Die Bedieneinrichtung 10 weist ein einziges Universal-Bedienelement 10' auf, das als ein im wesentlichen zylindrischer Bedienknopf ausgebildet ist, und das vom Griffteil 2 absteht. Das Universal-Bedienelement 10' ist an der hinteren Stirnseite 8 des Griffteils 2 angeordnet, an dem auch das Netzkabel 11 in den hinteren Gehäuseabschnitt 7 des Griffteils 2 eintritt. Das Display 9 ist ebenfalls an dem hinteren Gehäuseabschnitt 7 des Griffteils 2 nahe der hintern Stirnseite 8, jedoch umfangsseitig angeordnet, wo auch die Lufteintrittsöffnungen 3 des Luftkanals positioniert sind.In addition, between the blower and the rear end face 8 of the handle part 2, a likewise invisible microprocessor control is installed, each with a semiconductor power switch connected upstream of the heating element and the electric motor. The microprocessor of the microprocessor control is electrically connected to an electronic digital display panel 9 in the form of a display 9 and with an operating device 10, which are arranged at the rear of the rear housing section 7 of the handle part 2 and visible from the outside. The operating device 10 has a single universal operating element 10 ', which is designed as a substantially cylindrical control knob, and which protrudes from the handle part 2. The universal operating element 10 'is arranged on the rear end face 8 of the grip part 2, on which the power cable 11 also enters the rear housing section 7 of the grip part 2. The display 9 is also on the rear housing portion 7 of the handle part 2 near the rear end side 8, However, arranged circumferentially, where the air inlet openings 3 of the air duct are positioned.

Das in der Figur 2 als Ausschnittsvergrößerung dargestellte Universal-Bedienelement 10', mit dem digitale Eingaben dem Mikroprozessor als Befehle zugeführt werden, ist zur Eingabe von Steuerdaten axial verschiebbar und in Umfangsrichtung drehbar. Die Bedieneinrichtung 10 überbrückt bei Betätigung des Universal-Bedienelements 10' elektrische Kontakte, die mit dem Mikroprozessor verbunden sind und überträgt digitale Signale dorthin. Die Figuren 3a - 3c zeigen die vorgesehenen unterschiedlichen Betätigungsmöglichkeiten des Universal-Bedienelementes 10'. Das Universal-Bedienelement 10' ist in axialer Richtung als Taster ausgebildet, wie die Figuren 3a, 3b symbolisch zeigen. Die mittels des Universal-Bedienelements 10' betätigbare Bedieneinrichtung 10 gibt in Abhängigkeit von der axialen Betätigungsdauer unterschiedliche digitale Signale zur Einstellung des Betriebszustandes bzw. zu Betriebsparametern des Heißlufthandgerätes 1 ab. Sie gibt außerdem in Abhängigkeit von der Häufigkeit der axialen Betätigung in einem bestimmten Zeitfenster andere Signale zur Einstellung des Heißlufthandgerätes 1 ab. Wie die Figur 3c zeigt, ist das Universal-Bedienelement 10' in beide mögliche Drehrichtungen in Umfangsrichtung drehbar. Auch in Abhängigkeit von dem Drehsinn bzw. dem Drehwinkel gibt das Universal-Bedienelement weitere andersartige Signale zur Einstellung von anderen Betriebszuständen oder Betriebsparametern des Heißlufthandgerätes 1 an die Mikroprozessor-Steuerung ab. Darüber hinaus führt die Kombination von Tast- und Drehbewegungen nochmals zu einer anderen Befehlsfolge.That in the FIG. 2 shown as a detail enlargement universal control element 10 ', are supplied to the digital inputs to the microprocessor as commands, is axially displaceable for inputting control data and rotatable in the circumferential direction. The operating device 10 bridges upon actuation of the universal control element 10 'electrical contacts that are connected to the microprocessor and transmits digital signals there. The FIGS. 3a-3c show the intended different operation possibilities of the universal control element 10 '. The universal control element 10 'is formed in the axial direction as a button, like the FIGS. 3a, 3b show symbolically. The operating device 10 which can be actuated by means of the universal operating element 10 'emits different digital signals for setting the operating state or operating parameters of the hot air handler 1 as a function of the axial operating time. It also outputs other signals depending on the frequency of the axial actuation in a specific time window for setting the hot air handler 1. As the Figure 3c shows, the universal control element 10 'in both possible directions of rotation in the circumferential direction rotatable. Also, depending on the direction of rotation or the angle of rotation, the universal control element outputs other different types of signals for setting other operating states or operating parameters of the hot air handler 1 to the microprocessor control. In addition, the combination of tactile and rotary movements again leads to a different command sequence.

Die Figur 4 zeigt das elektronische digitale Display 9 des Heißlufthandgerätes 1 in vergrößerter Darstellung. Das Display 9 weist mittig eine dreieinhalbstellige 7-Segment-Anzeige 12 für die Temperatureingabe und -anzeige auf. Darunter angeordnet ist eine 5-segmentige Balken-Anzeige 14 zur Einstellung bzw. Anzeige der Luftmenge. Oberhalb und links der dreistelligen 7-Segment-Temperatur-Anzeige 12 sind an eine Anzahl von Funktionssymbolen 14 angeordnet, über die Warnmeldungen, Störmeldungen oder bestimmte Sonderbetriebszustände des Heißlufthandgerätes 1 visualisiert werden können. Für die Darstellung von Temperaturen in der Einheit °F müssen bei 700°C noch zusätzlich eine Tausenderstelle Angezeigt werden. Diese befindet sich zwischen den Dreiecksymbolen und der Zahl 6 in der Fig. 4. Da die 1000er Position nur zur Anzeige von 1 oder nichts verwendet wird, ist dies die halbe Stelle.The FIG. 4 shows the electronic digital display 9 of the hot air handler 1 in an enlarged view. The display 9 has centrally a three-and-a-half digit 7-segment display 12 for the temperature input and display. Arranged below is a 5-segment bar display 14 for setting or displaying the amount of air. Above and to the left of the three-digit 7-segment temperature display 12 are connected to a number of function symbols 14 arranged, can be visualized via the warning messages, fault messages or certain special operating conditions of the hot air handler 1. For the representation of temperatures in the unit ° F at 700 ° C additionally a thousands place must be indicated. This is located between the triangle symbols and the number 6 in the Fig. 4 , Since the 1000's position is only used to display 1 or nothing, this is halfway.

Claims (14)

  1. Hand-held hot air device (1), preferably for the local heating of thermoplastic materials, with a housing (2') that forms a wand-shaped handle part (2) with air inlet openings (3), and with an air guidance tube (4) that protrudes from the handle part (2) and radially delimits an air canal, with an electric heating element contained in the air guidance tube (4) and an electric motor with a fan wheel contained in the handle part (2), and with an electronic control system arranged inside the handle part (2) with one semiconductor power switch each arranged upstream of the heating element and the electric motor, and with a display screen (9) and an operating device (10) for the hand-held hot air device (1) arranged on the outside of the handle part (2), characterized in that the electronic control system is implemented as microprocessor control system and the display screen as an electronic digital display (9) and the operating device (10) as a digital operating device (10), with the digital operating device (10), characterized in that the digital operating device (10) comprises a single universal operating element (10') that is movable in at least two directions relative to the handle part (2) for the purpose of switching the hand-held hot air device (1) on and off and for determining control data of the microprocessor control system, and the universal operating element (10') can be shifted axially and/or rotated in the circumferential direction.
  2. Hand-held hot air device according to claim 1, characterized in that, when the universal operating element (10') is actuated, the actuation device (10) bridges electrical contacts that transfer digital signals to the microprocessor control system.
  3. Hand-held hot air device according to claim 1 or 2, characterized in that depending on the duration of the actuation of the universal operating element (10'), the microprocessor control system selects and/or changes different adjustment parameters.
  4. Hand-held hot air device according to any one of the preceding claims, characterized in that depending on the frequency of the actuation of the universal operating element (10'), the microprocessor control system selects and/or changes different adjustment parameters.
  5. Hand-held hot air device according to any one of the preceding claims, characterized in that the universal operating element (10') has two directions of rotation in the circumferential direction and, depending on the direction of rotation, selects and/or changes different adjustment parameters.
  6. Hand-held hot air device according to claim 5, characterized in that the universal operating element (10') has more than one contact position in both directions of rotation, with the signals for adjusting the operating conditions being dependent on the angle of rotation.
  7. Hand-held hot air device according to any one of the preceding claims, characterized in that the universal operating element (10') is implemented with an automatic return function.
  8. Hand-held hot air device according to any one of the preceding claims, characterized in that the microprocessor control system comprises a software locking function for the universal operating element (10').
  9. Hand-held hot air device according to any one of the preceding claims, characterized in that the microprocessor control system comprises means of detection for detecting the voltage.
  10. Hand-held hot air device according to any one of the preceding claims, characterized in that the microprocessor control system comprises means of detection for detecting the temperature.
  11. Hand-held hot air device according to any one of the preceding claims, characterized in that the microprocessor control system comprises an energy saving function that can be activated via the universal operating element (10').
  12. Hand-held hot air device according to any one of the preceding claims, characterized in that the microprocessor control system comprises a cool-down function that can be activated via the universal operating element (10').
  13. Hand-held hot air device according to any one of the preceding claims, characterized in that the microprocessor control system outputs target and actual values of process parameters, device functions, warning and/or failure messages, and displays them via the display (9).
  14. Hand-held hot air device according to any one of the preceding claims, characterized in that the microprocessor control system comprises a start-up locking function that can be influenced via the universal operating element (10').
EP12401206.3A 2011-11-21 2012-10-17 Hand-held hot air device with digital control device with universal control element Active EP2604947B1 (en)

Applications Claiming Priority (1)

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DE202011052043U DE202011052043U1 (en) 2011-11-21 2011-11-21 Hot air hand-held device with a digital operating device with universal operating element

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EP2604947A2 EP2604947A2 (en) 2013-06-19
EP2604947A3 EP2604947A3 (en) 2015-06-24
EP2604947B1 true EP2604947B1 (en) 2017-03-01

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EP (1) EP2604947B1 (en)
CN (1) CN103134191B (en)
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Publication number Publication date
EP2604947A2 (en) 2013-06-19
US20130129328A1 (en) 2013-05-23
US8948577B2 (en) 2015-02-03
CN103134191A (en) 2013-06-05
CN103134191B (en) 2016-02-10
DE202011052043U1 (en) 2012-02-09
EP2604947A3 (en) 2015-06-24

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