EP2677247B1 - Handheld hot air device - Google Patents
Handheld hot air device Download PDFInfo
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- EP2677247B1 EP2677247B1 EP13164685.3A EP13164685A EP2677247B1 EP 2677247 B1 EP2677247 B1 EP 2677247B1 EP 13164685 A EP13164685 A EP 13164685A EP 2677247 B1 EP2677247 B1 EP 2677247B1
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- Prior art keywords
- energy storage
- signaling
- hot air
- storage means
- electrical
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- 230000011664 signaling Effects 0.000 claims description 54
- 238000004146 energy storage Methods 0.000 claims description 45
- 238000010438 heat treatment Methods 0.000 claims description 40
- 239000003990 capacitor Substances 0.000 claims description 19
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims description 2
- 230000009849 deactivation Effects 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 238000001816 cooling Methods 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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Classifications
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- 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
Definitions
- the present invention relates to a hot air handler according to the preamble of claim 1.
- Such hot air devices are used to heat a workpiece in whole or in sections specifically to temperatures of, for example, up to 650 ° C.
- a hot air gun which, in order to allow a more accurate temperature setting, with an electrical temperature sensor and a temperature sensor associated electronic circuitry comprising a measuring amplifier and a light emitting diode band having a temperature indicator is equipped.
- control the actual air temperature is controlled to a manually set target temperature, via the temperature display device, the actual air temperature is displayed.
- the DE 20 2009 000 373 U1 a hot air gun, in which a temperature indication mechanism is provided, the operator is the presence of a critical Beerauslass Wegstemperatur even then reliably indicates when the hot air gun is off and / or disconnected from the mains, deliberately dispensing with the need for an electrical power supply.
- the temperature indication mechanism operates purely mechanically and preferably comprises a bimetallic adjusting means, which mechanically deforms depending on the temperature and thus indirectly indicates a measured temperature of the air outlet piece.
- a disadvantage of this embodiment is that a residual heat is not necessarily indicated by non-optimal mechanical contact between the bimetal and the Heilauslass choir or mechanical interference, such as jamming. Also, precise adjusting means made of a bimetal in production and manufacture are difficult to manufacture and expensive, with unavoidable scattering effects in series production.
- Object of the present invention is to propose a hot air handler, in which the signaling of a risk of burn is less prone to error, can be produced inexpensively and mass production and in which the signaling reliably and effectively counteracts the risk of burns.
- a hot air device namely an electric hot air handler, in particular hot air gun, H strictly compassionfön or hot air bar, with an end, preferably metallic, Heilauslass choir, energized, on and off heating means and, preferably optical , Signaling means for signaling a risk of burn, the signaling means are designed so that they are signaling after switching off the heating means for a predetermined by Thompsonsgabesch, independent of the actual temperature of the Heilauslass choir signaling time and thereby signal a danger of burns.
- Another advantage is that a sufficiently long time for all possible dangerous situations can be specified and it is simultaneously adaptable to, in particular legal and / or company-owned, safety regulations.
- Such a hot air device thus makes it possible to avoid a possible source of error in the signaling of a risk of combustion, namely the measurement of the temperature of the air outlet and / or the heat dissipation of heat from the air outlet, by selecting the predetermined signaling time by suitable design of the timing means, that it is at least as long as the cooling time of the Heilauslass matters, which is to be understood as cooling time, in particular the time required for the Heilauslass schizophrenia after a continuous operation of at least 45 minutes of the heater and / or of the construction-related device-specific by the heating maximum achievable Temperature of the Heilauslass drasticallys to a temperature at which a injury-free contact of the Heilauslass occidentals is possible and no risk of burns, in particular of below 50 ° C, preferably below 40 °, more preferably below 36 °, to cool (preferably in a wind-free room temperature of 35 ° C at a rel.
- the signaling time is preferably at least 2 to 5 minutes, preferably at least 5 to 15 minutes, more preferably at least 10 to 30 minutes, particularly preferably at least 30 to 60 minutes. It is possible to deliberately put up with the fact that the danger of burns may be too long here, as this does not result in any significant disadvantage, but guarantees the safety of the operator.
- a previously described hot air device can be designed such that the timing means comprise electrical energy storage means which are designed and arranged such that they charge up to a maximum energy storage capacity when the heating means are switched on.
- the energy storage means are in this case associated with the signaling means so that the energy storage means discharged in the off state of the heating means at the signaling means by the signaling means use the energy of the energy storage means to signal a risk of burn, so that they cause a signaling time by operating the signal means ,
- the energy storage means of the timing means in the off state of the heating means the only energy source for the signaling means and preferably supply the energy storage means exclusively the signaling means with energy and in particular do not provide the heating means with energy.
- the energy storage means are charged during the heating operation of the Schu Kunststoffdorfs and serve in non-heating operation (ie, the cooling phase of the air outlet) as an energy source to signal a risk of burns.
- the time for which a danger of burns is signaled depends in particular on the maximum energy storage capacity of the energy storage means, the charging and discharging rate of the energy storage means, the preceding charging or heating operation time and the energy consumption of the signaling means.
- the signaling time can be adjusted to be at least as long as the cooling time of the air outlet.
- a cooling time can be determined, in particular as a time that the shipsauslass choir needed to cool to a temperature of below 50 ° C, preferably below 36 °, (preferably at a wind free room temperature of 35 ° C at a relative humidity of 10 %).
- a signaling time can be determined for each charging time of the energy storage device, for which the signaling means signal a risk of burns.
- the energy consumption of the signaling means may also be a function of the stored energy on the energy storage means
- the relevant variables for the signaling time energy storage capacity (ie about the amount of charge and / or the stored electrical energy ) of the energy storage means and the charging and discharging rate of the energy storage means (which are usually directly dependent on the energy storage capacity in practice).
- the energy storage means comprise a capacitor or are formed as a capacitor.
- Capacitors can be charged quickly, so energy needed to signal a burn hazard is stored quickly, increasing safety.
- capacitors are commercially available as components in various embodiments and thus easily adaptable in their parameters to the other conditions (in particular to the signaling means and the supply voltage) and also inexpensive.
- Particularly advantageous is the use of a capacitor, in particular in comparison to rechargeable batteries and / or rechargeable batteries, since no costly charging electronics is required for a capacitor and also the wear, especially with regard to a degradation of the maximum energy storage amount, is lower.
- the energy storage means may comprise an accumulator and / or a battery, thereby also making it possible to use signaling means with increased energy consumption, the operation of which is solely with a condenser would be difficult, since capacitors with a correspondingly high capacity bring a lot of space, which would oppose a compact design, and appropriately designed capacitors are sometimes relatively expensive.
- the signaling means include lighting means for optical signaling of a risk of burns, thereby ensuring that, inter alia, in a dark environment reliable warning of a risk of burns.
- the lighting means comprise at least one light-emitting diode.
- Light-emitting diodes are characterized (in particular with a correspondingly adapted current-limiting series resistor) by their low energy consumption, so that the maximum energy storage capacity of the energy storage medium can be made correspondingly small, which leads, for example, when using a capacitor to a lower required capacity and thus a smaller size.
- the signaling means may for example also comprise acoustic signaling means.
- the signaling means may also comprise an LCD display, which is designed a residual heat, possibly with several residual heat levels indicating.
- the signaling means preferably signal a risk of burn even in heating mode, in which case the energy required for the signaling can come from the energy storage means, but does not necessarily have to come.
- the supply voltage is applied directly to the signaling means in the heating mode, which is also applied to the energy storage means.
- the supply voltage of the heating means is advantageously applied to the energy storage means. This can be achieved in a particularly simple manner that the energy storage means are charged when the heating means to heat. Furthermore, the creation of different voltage levels on the heating means (such as a tap changer, which determines the degree of heating) in this case automatically means that the energy storage means are loaded differently depending on the voltage level and thus the signaling time is adjusted accordingly.
- the heating means are preferably operated with DC voltage. If they are operated with alternating voltage, a rectifier or the like can be used in a known manner.
- the supply voltage can be tapped here, for example, on a heating element or even on a fan associated therewith, which is to be regarded as part of the heating means.
- a relay in the circuit of the heating means can be used, that closes a circuit via the capacitor, and / or suitably designed voltage transformers are used.
- the hot air device is designed so that the air leaving the shipsauslass choir by operating the heating means can reach a temperature of at least 300 ° C, preferably between 300 ° C and 800 ° C.
- FIG. 1 schematically heater shown in the electrical structure, here for example a hot air gun, has heating means 10 which heat up when energized.
- a switch 12 is provided which can open and close a circuit via the heating means 10 and thereby the energization of the heating means 10 by applying a supply voltage U 0 can influence specifically. If the switch 12 is closed, the supply voltage U 0 is applied, a corresponding heating current flows and the heating means 12 are in the switched-on state; If the switch 12 is opened, the supply voltage U 0 is not present and the heating means 12 are in the switched-off state.
- the heater comprises by a capacitor 15 formed energy storage means 14 and signaling means 16 which have a light emitting diode 17 and a pre-resistor 18 associated therewith.
- the energy storage means 14 and the signaling means 16 is associated with a reflux barrier diode 20, which prevents a discharge of the energy storage means 14 to the heating means 10.
- the capacitor 15 maintains the previously applied voltage and thereby releases energy to the signaling means 16 by discharging charge carriers, thereby gradually discharging (and thereby also gradually decreasing the voltage across the capacitor) and causing the LED 17 lights up.
- the signaling time can be determined uniquely by the capacitance of the capacitor, the supply voltage U 0 , the series resistor 18 and by the diode characteristics of the reverse-flow blocking diode 20 and the light-emitting diode 17.
- the voltage applied to the capacitor by a (not shown) corresponding series resistor adjust accordingly.
Description
Die vorliegende Erfindung betrifft ein Heißlufthandgerät nach dem Oberbegriff des Anspruchs 1.The present invention relates to a hot air handler according to the preamble of claim 1.
Solche Heißluftgeräte kommen zum Einsatz, um ein Werkstück ganz oder abschnittsweise gezielt auf Temperaturen von beispielsweise bis zu 650° C zu erhitzen.Such hot air devices are used to heat a workpiece in whole or in sections specifically to temperatures of, for example, up to 650 ° C.
Aus der
Bei bekannten Heißluftpistolen kommt es immer wieder vor, dass sich Bedienpersonen durch eine unsachgemäße Handhabung Verbrennungen zuführen. Dies ist häufig darauf zurückzuführen, dass das metallische, aus einem Kunststoffgehäuse herausragende, rohrförmige Luftauslassstück auch nach erfolgter Abschaltung der Heißluftpistole längere Zeit sehr hohe Temperaturen aufweist. Wird während der Abkühlphase die Heißluftpistole von der Bedienperson anstatt am Griff unsachgemäß am Luftauslassstück gegriffen, kann diese sich erhebliche Verletzungen zuziehen.In known hot air guns, it happens again and again that operators perform burns due to improper handling. This is often due to the fact that the metallic, protruding from a plastic housing, tubular Luftauslass piece even after the shutdown of the hot air gun for a long time has very high temperatures. If, during the cooling phase, the operator grips the air outlet piece inappropriately instead of the handle during the cooling phase, this can cause serious injury.
Um derartige Unfälle zu vermeiden - insbesondere im Hinblick auf die in einigen Staaten streng gehandhabte Produkthaftung - schlägt die
Nachteilig bei dieser Ausführungsform ist, dass durch nicht optimalen mechanischem Kontakt zwischen dem Bimetall und dem Luftauslassstück oder durch mechanischen Störungen, wie einem Verklemmen, eine Restwärme nicht zwangsläufig angezeigt wird. Auch sind präzise Stellmittel aus einem Bimetall in der Produktion und Fertigung schwer herzustellen und teuer, mit nicht vermeidbaren Streuungseffekten in der Serienproduktion.A disadvantage of this embodiment is that a residual heat is not necessarily indicated by non-optimal mechanical contact between the bimetal and the Luftauslassstück or mechanical interference, such as jamming. Also, precise adjusting means made of a bimetal in production and manufacture are difficult to manufacture and expensive, with unavoidable scattering effects in series production.
Aufgabe der vorliegenden Erfindung ist es, ein Heißlufthandgerät vorzuschlagen, bei dem die Signalisierung einer Verbrennungsgefahr weniger fehleranfällig ist, kostengünstig und großserientauglich hergestellt werden kann und bei welchem die Signalisierung zuverlässig und wirksam der Verbrennungsgefahr entgegenwirkt.Object of the present invention is to propose a hot air handler, in which the signaling of a risk of burn is less prone to error, can be produced inexpensively and mass production and in which the signaling reliably and effectively counteracts the risk of burns.
Die Aufgabe wird dadurch gelöst, dass bei einem Heißluftgerät nach dem Oberbegriff des Anspruchs 1, nämlich einem Elektro-Heißlufthandgerät, insbesondere Heißluftpistole, Heißluftfön oder Heißluftstab, mit einem endseitigen, vorzugsweise metallischen, Luftauslassstück, bestrombaren, ein- und ausschaltbaren Heizmitteln sowie, bevorzugt optische, Signalisierungsmitteln zur Signalisierung einer Verbrennungsgefahr, die Signalisierungsmittel so ausgebildet sind, dass sie nach Ausschalten der Heizmittel für eine durch Zeitvorgabemittel vorbestimmte, von der tatsächlichen Temperatur des Luftauslassstücks unabhängige, Signalisierungszeit signalgebend sind und hierdurch eine Verbrennungsgefahr signalisieren.The object is achieved in that in a hot air device according to the preamble of claim 1, namely an electric hot air handler, in particular hot air gun, Heißluftfön or hot air bar, with an end, preferably metallic, Luftauslassstück, energized, on and off heating means and, preferably optical , Signaling means for signaling a risk of burn, the signaling means are designed so that they are signaling after switching off the heating means for a predetermined by Zeitungsgabemittel, independent of the actual temperature of the Luftauslassstück signaling time and thereby signal a danger of burns.
Unter einer vorbestimmten, von der tatsächlichen Temperatur des Luftauslassstücks unabhängige Signalisierungszeit ist hier insbesondere zu verstehen, dass die Temperatur des weder mittelbar noch unmittelbar einen Einfluss auf die Zeitvorgabemittel und/oder die Signalisierungszeit hat, insbesondere dass die Signalisierungsmittel effektiv eine Verbrennungsgefahr unabhängig von einer gemessenen, sonstwie ermittelten oder wirkverbunden übertragenen Temperatur des Luftauslassstücks signalisieren.Under a predetermined, independent of the actual temperature of the Luftauslassstücks signaling time is here in particular too understand that the temperature of neither indirectly nor directly has an influence on the timing means and / or the signaling time, in particular that the signaling means effectively signal a risk of burns regardless of a measured, otherwise determined or operatively transmitted temperature of the air outlet.
Weiterer Vorteil ist, dass eine ausreichend lange Zeit für alle möglichen Gefahrensituationen vorgebbar ist und sie gleichzeitig an, insbesondere gesetzliche und/oder betriebseigene, Sicherheitsvorschriften anpassbar ist.Another advantage is that a sufficiently long time for all possible dangerous situations can be specified and it is simultaneously adaptable to, in particular legal and / or company-owned, safety regulations.
Ein solches Heißluftgerät ermöglicht es damit, eine mögliche Fehlerquelle bei der Signalisierung einer Verbrennungsgefahr, nämlich die Messung der Temperatur des Luftauslassstücks und/oder die Wärmeableitung von Wärme von dem Luftauslassstück, zu vermeiden, indem die vorbestimmte Signalisierungszeit durch geeignete Auslegung der Zeitvorgabemittel so gewählt wird, dass sie mindestens so lange ist wie die Abkühlzeit des Luftauslassstücks, wobei als Abkühlzeit, insbesondere die Zeit zu verstehen ist, die das Luftauslassstück benötigt, um nach einem Dauerbetrieb von mindestens 45 Minuten des Heizgeräts und/oder von der baubedingten gerätespezifischen durch den Heizbetrieb maximal erreichbaren Temperatur des Luftauslassstücks auf eine Temperatur, bei der eine verletzungsfreie Berührung des Luftauslassstücks möglich ist und keine Verbrennungsgefahr besteht, insbesondere von unter 50 ° C, bevorzugt unter 40°, weiter bevorzugt unter 36°, abzukühlen (bevorzugt bei einer windfreien Raumtemperatur von 35° C bei einer rel. Luftfeuchte von 10%). Bevorzugt beträgt die Signalisierungszeit mindestens 2 bis 5 Minuten, bevorzugt mindestens 5 bis 15 Minuten, weiter bevorzugt mindestens 10 bis 30 Minuten, besonders bevorzugt mindestens 30 bis 60 Minuten. Dass hier möglicherweise zu lange vor einer Verbrennungsgefahr gewarnt wird, kann bewusst in Kauf genommen werden, da hierdurch kein maßgeblicher Nachteil entsteht, die Sicherheit der Bedienperson jedoch gewährleistet ist.Such a hot air device thus makes it possible to avoid a possible source of error in the signaling of a risk of combustion, namely the measurement of the temperature of the air outlet and / or the heat dissipation of heat from the air outlet, by selecting the predetermined signaling time by suitable design of the timing means, that it is at least as long as the cooling time of the Luftauslassstücks, which is to be understood as cooling time, in particular the time required for the Luftauslassstück after a continuous operation of at least 45 minutes of the heater and / or of the construction-related device-specific by the heating maximum achievable Temperature of the Luftauslassstücks to a temperature at which a injury-free contact of the Luftauslassstücks is possible and no risk of burns, in particular of below 50 ° C, preferably below 40 °, more preferably below 36 °, to cool (preferably in a wind-free room temperature of 35 ° C at a rel. Humidity of 10%). The signaling time is preferably at least 2 to 5 minutes, preferably at least 5 to 15 minutes, more preferably at least 10 to 30 minutes, particularly preferably at least 30 to 60 minutes. It is possible to deliberately put up with the fact that the danger of burns may be too long here, as this does not result in any significant disadvantage, but guarantees the safety of the operator.
Weitere vorteilhafte Ausgestaltungsformen der Erfindung sind in den Unteransprüchen angegeben. In den Rahmen der Erfindung fallen sämtliche Kombinationen aus zumindest zwei von in der Beschreibung, den Ansprüchen und/oder den Figuren offenbarten Merkmalen.Further advantageous embodiments of the invention are specified in the subclaims. All combinations of at least two features disclosed in the description, the claims and / or the figures fall within the scope of the invention.
Auf besonders vorteilhafte Weise lässt sich ein vorbeschriebenes Heißluftgerät derart ausbilden, dass die Zeitvorgabemittel elektrische Energiespeichermittel umfassen, die so ausgebildet und angeordnet sind, dass sie sich bei eingeschalteten Heizmitteln bis zu einem maximalen Energiespeichervermögen aufladen. Die Energiespeichermittel sind den Signalisierungsmitteln hierbei so zugeordnet, dass sich die Energiespeichermittel im ausgeschalteten Zustand der Heizmittel an den Signalisierungsmitteln entladen, indem die Signalisierungsmitteln die Energie der Energiespeichermittel nutzen, um eine Verbrennungsgefahr zu signalisieren, also dass sie durch ein Betreiben der Signalmittel eine Signalgabezeit zu bewirken. Bevorzugt sind die Energiespeichermittel der Zeitvorgabemittel im ausgeschalteten Zustand der Heizmittel die einzige Energiequelle für die Signalisierungsmittel und bevorzugt versorgen die Energiespeichermittel ausschließlich die Signalisierungsmittel mit Energie und versorgen insbesondere nicht die Heizmittel mit Energie.In a particularly advantageous manner, a previously described hot air device can be designed such that the timing means comprise electrical energy storage means which are designed and arranged such that they charge up to a maximum energy storage capacity when the heating means are switched on. The energy storage means are in this case associated with the signaling means so that the energy storage means discharged in the off state of the heating means at the signaling means by the signaling means use the energy of the energy storage means to signal a risk of burn, so that they cause a signaling time by operating the signal means , Preferably, the energy storage means of the timing means in the off state of the heating means, the only energy source for the signaling means and preferably supply the energy storage means exclusively the signaling means with energy and in particular do not provide the heating means with energy.
Anders ausgedrückt werden die Energiespeichermittel während des Heizbetriebs des Heizluftgeräts aufgeladen und dienen im nicht-heizenden Betrieb (also der Abkühlphase des Luftauslassstücks) als Energiequelle, um eine Verbrennungsgefahr zu signalisieren. Die Zeit, für die eine Verbrennungsgefahr signalisiert wird, hängt hierbei insbesondere von dem maximalen Energiespeichervermögen der Energiespeichermittel, der Auflade- und Entladerate der Energiespeichermittel, der vorausgehenden Auflade- bzw. Heizbetriebszeit und dem Energieverbrauch der Signalisierungsmittel ab.In other words, the energy storage means are charged during the heating operation of the Heizluftgeräts and serve in non-heating operation (ie, the cooling phase of the air outlet) as an energy source to signal a risk of burns. The time for which a danger of burns is signaled depends in particular on the maximum energy storage capacity of the energy storage means, the charging and discharging rate of the energy storage means, the preceding charging or heating operation time and the energy consumption of the signaling means.
Durch geeignete Abstimmung dieser Parameter, kann die Signalisierungszeit so angepasst werden, dass sie mindestens so groß ist wie die Abkühlzeit des Luftauslassstücks.By appropriately tuning these parameters, the signaling time can be adjusted to be at least as long as the cooling time of the air outlet.
Für jede Heizbetriebszeit lässt sich eine Abkühlzeit ermitteln, insbesondere als Zeit, die das Luftauslassstück benötigt um auf eine Temperatur von unter 50° C, bevorzugt unter 36°, abzukühlen (bevorzugt bei einer windfreien Raumtemperatur von 35° C bei einer rel. Luftfeuchte von 10%). Ebenso lässt sich für jede Aufladezeit der Energiespeichermittel eine Signalisierungszeit ermitteln, für die die Signalisierungsmittel eine Verbrennungsgefahr signalisieren. Setzt man den Energieverbrauch der Signalisierungsmittel als fest an (wobei der Energieverbrauch der Signalisierungsmittel auch eine Funktion der gespeicherten Energie auf den Energiespeichermitteln sein kann), so sind die maßgebliche Variablen für die Signalisierungszeit das Energiespeichervermögen (also etwa die Ladungsmenge und/oder die gespeicherte elektrische Energieladung) der Energiespeichermittel und die Auflade- und Entladerate der Energiespeichermittel (welche in der Praxis meist direkt von dem Energiespeichervermögen abhängig sind).For each Heizbetriebszeit a cooling time can be determined, in particular as a time that the Luftauslassstück needed to cool to a temperature of below 50 ° C, preferably below 36 °, (preferably at a wind free room temperature of 35 ° C at a relative humidity of 10 %). Likewise, a signaling time can be determined for each charging time of the energy storage device, for which the signaling means signal a risk of burns. If one sets the energy consumption of the signaling means as fixed (the energy consumption of the signaling means may also be a function of the stored energy on the energy storage means), then the relevant variables for the signaling time energy storage capacity (ie about the amount of charge and / or the stored electrical energy ) of the energy storage means and the charging and discharging rate of the energy storage means (which are usually directly dependent on the energy storage capacity in practice).
Als besonders bevorzugt hat es sich herausgestellt, dass die Energiespeichermittel einen Kondensator umfassen oder als Kondensator ausgebildet sind. Kondensatoren lassen sich schnell beladen, sodass die für die Signalisierung einer Verbrennungsgefahr notwendige Energie schnell gespeichert ist, was die Sicherheit erhöht. Außerdem sind Kondensatoren als Bauteile in verschiedensten Ausführungsformen handelsüblich erhältlich und somit in ihren Parametern leicht an die weiteren Beschaffenheiten (insbesondere an die Signalisierungsmittel und die Versorgungsspannung) anpassbar und auch preisgünstig. Besonders vorteilhaft ist die Verwendung eines Kondensators insbesondere im Vergleich zu Akkumulatoren und/oder wiederbeladbaren Batterien, da für einen Kondensator keine aufwendige Ladeelektronik benötigt wird und auch der Verschleiß, insbesondere im Hinblick auf eine Degradation der maximalen Energiespeichermenge, geringer ist.As a particularly preferred it has been found that the energy storage means comprise a capacitor or are formed as a capacitor. Capacitors can be charged quickly, so energy needed to signal a burn hazard is stored quickly, increasing safety. In addition, capacitors are commercially available as components in various embodiments and thus easily adaptable in their parameters to the other conditions (in particular to the signaling means and the supply voltage) and also inexpensive. Particularly advantageous is the use of a capacitor, in particular in comparison to rechargeable batteries and / or rechargeable batteries, since no costly charging electronics is required for a capacitor and also the wear, especially with regard to a degradation of the maximum energy storage amount, is lower.
Gleichwohl können die Energiespeichermittel, möglicherweise zusätzlich zu einem Kondensator, einen Akkumulator und/oder eine Batterie umfassen, wodurch es auch ermöglicht wird Signalisierungsmittel mit einem erhöhten Energieverbrauch einzusetzen, deren Betrieb alleine mit einem Kondensator schwer möglich wäre, da Kondensatoren mit einer entsprechend hohen Kapazität einen hohen Platzbedarf mit sich bringen, der einer kompakten Bauform entgegenstehen würde, und entsprechend ausgelegte Kondensatoren mitunter vergleichsweise teuer sind.However, the energy storage means, possibly in addition to a capacitor, may comprise an accumulator and / or a battery, thereby also making it possible to use signaling means with increased energy consumption, the operation of which is solely with a condenser would be difficult, since capacitors with a correspondingly high capacity bring a lot of space, which would oppose a compact design, and appropriately designed capacitors are sometimes relatively expensive.
Besonders vorteilhaft umfassen die Signalisierungsmittel Leuchtmittel zur optischen Signalisierung einer Verbrennungsgefahr, hierdurch kann sichergestellt werden, dass unter anderem auch in einer dunklen Umgebung zuverlässig vor eine Verbrennungsgefahr gewarnt wird. Bevorzugt umfassen die Leuchtmittel mindestens eine Leuchtdiode. Leuchtdioden zeichnen sich (insbesondere mit einem entsprechend angepasstem strombegrenzenden Vorwiderstand) durch ihren geringen Energieverbrauch aus, sodass das maximale Energiespeichervermögen der Energiespeichermittel entsprechend klein ausgebildet sein kann, was beispielsweise beim Einsatz eines Kondensators zu einer niedrigeren benötigten Kapazität und somit einer kleineren Baugröße führt. Zusätzlich oder alternativ können die Signalisierungsmittel beispielsweise auch akustische Signalmittel umfassen.Particularly advantageously, the signaling means include lighting means for optical signaling of a risk of burns, thereby ensuring that, inter alia, in a dark environment reliable warning of a risk of burns. Preferably, the lighting means comprise at least one light-emitting diode. Light-emitting diodes are characterized (in particular with a correspondingly adapted current-limiting series resistor) by their low energy consumption, so that the maximum energy storage capacity of the energy storage medium can be made correspondingly small, which leads, for example, when using a capacitor to a lower required capacity and thus a smaller size. Additionally or alternatively, the signaling means may for example also comprise acoustic signaling means.
Ergänzend oder alternativ können die Signalisierungsmittel auch ein LCD-Display umfassen, welches eine Restwärme, möglicherweise mit mehreren Restwärmestufen, anzeigend ausgebildet ist.Additionally or alternatively, the signaling means may also comprise an LCD display, which is designed a residual heat, possibly with several residual heat levels indicating.
Bevorzugt signalisieren die Signalisierungsmittel bereits im Heizbetrieb eine Verbrennungsgefahr, wobei hier die für die Signalisierung notwendige Energie von den Energiespeichermitteln kommen kann, aber nicht zwangsläufig kommen muss. So ist beispielsweise denkbar, dass an den Signalisierungsmittel im Heizbetrieb direkt die Versorgungsspannung anliegt, die auch an den Energiespeichermitteln anliegt.The signaling means preferably signal a risk of burn even in heating mode, in which case the energy required for the signaling can come from the energy storage means, but does not necessarily have to come. Thus, for example, it is conceivable that the supply voltage is applied directly to the signaling means in the heating mode, which is also applied to the energy storage means.
Vorteilhaft liegt an den Energiespeichermitteln die Versorgungsspannung der Heizmittel, oder eine zu dieser proportionaler Spannung, an. Hierdurch kann auf besonders einfache Weise erreicht werden, dass die Energiespeichermittel geladen werden, wenn die Heizmittel heizen. Weiterhin führt das Anlegen von verschiedenen Spannungsstufen an den Heizmitteln (etwa durch einen Stufenschalter, der den Heizgrad vorgibt) in diesem Fall automatisch dazu, dass die Energiespeichermittel je nach Spannungsstufe unterschiedlich beladen werden und somit auch die Signalisierungszeit entsprechend angepasst ist. Hierfür sind die Heizmittel bevorzugt mit Gleichspannung betrieben. Werden sie mit Wechselspannung betrieben, kann auf bekannte Art ein Gleichrichter oder dergleichen zum Einsatz kommen. Die Versorgungsspannung kann hier beispielsweise an einem Heizelement oder aber auch an einem diesem zugeordneten Lüfter, welcher als Teil der Heizmittel anzusehen ist, elektrisch abgegriffen werden.The supply voltage of the heating means, or a voltage proportional thereto, is advantageously applied to the energy storage means. This can be achieved in a particularly simple manner that the energy storage means are charged when the heating means to heat. Furthermore, the creation of different voltage levels on the heating means (such as a tap changer, which determines the degree of heating) in this case automatically means that the energy storage means are loaded differently depending on the voltage level and thus the signaling time is adjusted accordingly. For this purpose, the heating means are preferably operated with DC voltage. If they are operated with alternating voltage, a rectifier or the like can be used in a known manner. The supply voltage can be tapped here, for example, on a heating element or even on a fan associated therewith, which is to be regarded as part of the heating means.
Alternativ oder ergänzend können, insbesondere wenn eine hohe Spannung an den Heizmitteln anliegt, ein Relais im Stromkreis der Heizmittel zum Einsatz kommen, dass einen Stromkreis über den Kondensator schließt, und/oder geeignet ausgebildete Spannungswandler zum Einsatz kommen.Alternatively or additionally, in particular when a high voltage is applied to the heating means, a relay in the circuit of the heating means can be used, that closes a circuit via the capacitor, and / or suitably designed voltage transformers are used.
Bevorzugt ist das Heißluftgerät so ausgebildet, dass die aus dem Luftauslassstück austretende Luft durch Betreiben der Heizmittel eine Temperatur von mindestens 300° C, bevorzugt zwischen 300° C und 800° C, erreichen kann.Preferably, the hot air device is designed so that the air leaving the Luftauslassstück by operating the heating means can reach a temperature of at least 300 ° C, preferably between 300 ° C and 800 ° C.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnungen. Diese zeigen in:
- Fig. 1
- ein Schaltbild für ein Ausführungsbeispiel eines erfindungsgemäßen Elektro-Heißluftgeräts.
- Fig. 1
- a circuit diagram for an embodiment of an electric hot air device according to the invention.
Das in
Weiterhin umfasst das Heizgerät durch einen Kondensator 15 ausgebildete Energiespeichermittel 14 sowie Signalisierungsmittel 16, die eine Leuchtdiode 17 und einen dieser zugeordneten Vorwiderstand 18 aufweisen. Den Energiespeichermitteln 14 und den Signalisierungsmitteln 16 ist eine Rückflusssperrdiode 20 zugeordnet, die eine Entladung der Energiespeichermittel 14 an den Heizmitteln 10 unterbindet.Furthermore, the heater comprises by a capacitor 15 formed energy storage means 14 and signaling means 16 which have a
Bei Betätigung des Schalters 12 (also im eingeschalteten Zustand der Heizmittel 10) liegt eine Spannung, die nur unwesentlich von der Versorgungsspannung U0 abweicht, an dem Kondensator 15 an, welcher sich entsprechend auflädt, wobei seine Kapazität und die anliegende Spannung das maximale Energiespeichervermögen bestimmt.Upon actuation of the switch 12 (ie in the on state of the heating means 10) is a voltage which deviates only slightly from the supply voltage U 0 , to the capacitor 15, which charges itself accordingly, with its capacity and the applied voltage determines the maximum energy storage capacity ,
Wird der Schalter 12 geöffnet, hält der Kondensator 15 die vorher anliegende Spannung aufrecht und gibt hierbei durch Abgabe von Ladungsträgern Energie an die Signalisierungsmittel 16 ab, wodurch er sich allmählich entlädt (und wodurch auch die Spannung am Kondensator nach und nach abnimmt) und wodurch die Leuchtdiode 17 leuchtet. Die Signalisierungszeit lässt sich hierbei durch die Kapazität des Kondensators, die Versorgungsspannung U0, den Vorwiderstand 18 und durch die Diodenkennlinien der Rückflusssperrdiode 20 sowie der Leuchtdiode 17 eindeutig bestimmten.When the
Je nach Anwendungsfall kann die am Kondensator anliegende Spannung durch einen (nicht dargestellten) entsprechenden Vorwiderstand (insbesondere vor der Rückflusssperrdiode 20) entsprechend anpassen.Depending on the application, the voltage applied to the capacitor by a (not shown) corresponding series resistor (in particular before the Rückflusssperrdiode 20) adjust accordingly.
Claims (10)
- An electrical handheld hot air device, in particular a heat gun or heating rod, comprising a, preferably metallic, air outlet piece at its end, activatable and deactivatable heating means (10), which can be supplied with electricity, as well as, preferably optical, signaling means (16) for signaling a heating state of the air outlet piece,
characterized in that
the signaling means (16) are realized for emitting signals for a signaling period predetermined by timing means after deactivation of the heating means (10), said signaling period being unrelated to the actual temperature of the air outlet piece. - The electrical handheld hot air device according to claim 1,
characterized in that
the timing means comprise electrical energy storage means (14), which are realized and disposed in such a manner that when the heating means (10) are activated, said electrical energy storage means (14) are charged up to a maximum energy storage capacity, said energy storage means (14) being assigned to the signaling means (16) in such a manner that when the heating means (10) are deactivated, the energy storage means (14) are discharged by operating the signaling means (16) in such a manner that the signaling means (16) use the energy of the energy storage means (14) to signal a signal-emitting state, in particular to signal a risk of burns. - The electrical handheld hot air device according to claim 2,
characterized in that
the energy storage means (14), the signaling means (16) and
the air outlet piece are configured and set up such that the maximum energy storage capacity, in particular as a capacity, of the energy storage means (14) is dimensioned so as to be able to store sufficient amounts of electrical energy in order to keep the signaling means (16) activated at least during a cooling-off period after switching the heating means (10) from an operation mode to a deactivated state, said cooling-off period being the time required for the air outlet piece to cool down from an operational temperature to a predetermined rest temperature. - The electrical handheld hot air device according to claims 2 to 3,
characterized in that
the energy storage means (14) comprise an electrical capacitor or are realized as a capacitor. - The electrical handheld hot air device according to claims 2 to 4,
characterized in that
the energy storage means (14) comprise an accumulator and/or a battery. - The electrical handheld hot air device according to one of the previous claims,
characterized in that
the signaling means (16) comprise illuminants, in particular having an LED and/or an LCD display. - The electrical handheld hot air device according to claims 2 to 6,
characterized in that
the signaling means (16), the air outlet piece and the energy storage means (14) are realized such that the signaling period is at least 2 minutes, preferably at least 5 minutes, more preferably at least 15 minutes, even more preferably at least 30 minutes. - The electrical handheld hot air device according to one of the claims 3 to 7,
characterized in that
the rest temperature is predetermined as a temperature below 50 °C, preferably below 40 °C, in particular preferably below 40 °C. - The electrical handheld hot air device according to one of the claims 2 to 8,
characterized in that
a supply voltage or a voltage dependent thereon and/or proportional thereto is applied to the energy storage means (14) for the operation of the heating means (10) when the heating means (10) are activated. - The electrical handheld hot air device according to claims 2 to 9,
characterized in that
the energy storage means (14) do not provide energy to the heating means (10).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202012102224 | 2012-06-18 | ||
| DE202012102736U DE202012102736U1 (en) | 2012-06-18 | 2012-07-20 | Hot-air hand-held device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP2677247A2 EP2677247A2 (en) | 2013-12-25 |
| EP2677247A3 EP2677247A3 (en) | 2018-03-21 |
| EP2677247B1 true EP2677247B1 (en) | 2019-02-20 |
Family
ID=49384759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13164685.3A Active EP2677247B1 (en) | 2012-06-18 | 2013-04-22 | Handheld hot air device |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2677247B1 (en) |
| DE (1) | DE202012102736U1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727982B (en) * | 2013-12-30 | 2016-04-13 | 广州广电计量检测股份有限公司 | Heat gun calibration steps |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8904733U1 (en) | 1989-04-14 | 1989-07-13 | Steinel Gmbh & Co Kg, 4836 Herzebrock, De | |
| CN200952821Y (en) * | 2006-08-18 | 2007-09-26 | 东莞市天工塑胶五金制品有限公司 | Hot air gun |
| DE202009000373U1 (en) | 2009-01-09 | 2009-03-26 | Steinel Gmbh | Heat gun |
| CN201569148U (en) * | 2009-09-23 | 2010-09-01 | 慈溪市宏冠电动工具有限公司 | Digital display thermoregulation hot air gun |
-
2012
- 2012-07-20 DE DE202012102736U patent/DE202012102736U1/en not_active Expired - Lifetime
-
2013
- 2013-04-22 EP EP13164685.3A patent/EP2677247B1/en active Active
Non-Patent Citations (1)
| Title |
|---|
| None * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2677247A3 (en) | 2018-03-21 |
| EP2677247A2 (en) | 2013-12-25 |
| DE202012102736U1 (en) | 2013-09-19 |
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