EP2040012B1 - Ventilateur d'air chaud ainsi que système doté d'un ventilateur d'air chaud et d'au moins une unité de codage - Google Patents

Ventilateur d'air chaud ainsi que système doté d'un ventilateur d'air chaud et d'au moins une unité de codage Download PDF

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Publication number
EP2040012B1
EP2040012B1 EP08016096.3A EP08016096A EP2040012B1 EP 2040012 B1 EP2040012 B1 EP 2040012B1 EP 08016096 A EP08016096 A EP 08016096A EP 2040012 B1 EP2040012 B1 EP 2040012B1
Authority
EP
European Patent Office
Prior art keywords
hot air
coding
air fan
coding unit
heating
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.)
Not-in-force
Application number
EP08016096.3A
Other languages
German (de)
English (en)
Other versions
EP2040012A2 (fr
EP2040012A3 (fr
Inventor
Ingo H. Steinel
Thomas Schreckenberger
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.)
Steinel GmbH and Co KG
Original Assignee
Steinel GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Steinel GmbH and Co KG filed Critical Steinel GmbH and Co KG
Publication of EP2040012A2 publication Critical patent/EP2040012A2/fr
Publication of EP2040012A3 publication Critical patent/EP2040012A3/fr
Application granted granted Critical
Publication of EP2040012B1 publication Critical patent/EP2040012B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24H3/02—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 invention relates to a trained as a hot air blower power tool according to the preamble of claim 1 with at least one fan and at least one electric heater. Furthermore, the invention relates to a system with this hot air blower and at least one coding unit.
  • a hot air blower also called hot gun or heat gun
  • hot gun is a power tool with which a work area (workpiece) can be heated in a targeted manner.
  • ambient air is sucked in with at least one fan wheel, heated by means of the heating device and then blown out through an outlet pipe onto the working area.
  • hot air blower the following common applications for hot air blower called: Removal of adhesive films, welding of plastics, molding of plastics, removal of paint or paint layers, especially on wood or metal, disinfecting laboratory equipment, drying of objects.
  • temperatures can usually be selected from a temperature range between about 50 ° C and about 650 ° C or above.
  • temperatures can usually be selected from a temperature range between about 50 ° C and about 650 ° C or above.
  • the user is unaware of the optimum working temperature ranges and tends to close the hot air blower at full heat output operate, which can lead to damage of the workpieces to be machined.
  • the US 6,647,203 D1 as well as the US 4,737,616 relate to non-specialist technologies of room ventilation and heating.
  • the documents do not relate to a power tool in the form of a hot air blower for heating a workpiece.
  • From the US 6,647,203 B1 It is known to adapt the device to different mains voltages in a simple manner.
  • the US 4,737,616 describes a modular system with a modular fixable in a housing heater.
  • the US 5,259,062 describes a fan device with different flow inserts.
  • the invention is therefore based on the object to provide an improved hot air blower (power tool), in which a simple way for the respective application an optimal heating power is adjustable, which is not arbitrarily variable by the user. Furthermore, the object is to propose a correspondingly improved system with such a hot air blower.
  • the invention is based on the idea to design the hot air blower such that the heating power of the electric heater and thus the temperature of the blown hot air can be predetermined by means of a coding unit in the hot air blower, wherein the coding unit is preferably detachably docked to the hot air blower.
  • the user does not have to make the setting of the optimum working temperature (hot air temperature) as in the prior art by means of a rotary control or by adjusting buttons, but in a trained according to the concept of the invention system with a hot air blower and several, in particular differently coded coding units by selecting a for Coding unit marked for the respective application and the connection of this coding unit with the hot air blower.
  • the hot air blower is off Safety reasons designed such that at least the electric heater is not operable without a docked to the hot air blower coding.
  • the risk of incorrect operation and thus the risk of damage to be heated workpieces is minimized.
  • such a trained hot air blower is easy and safe to use, without having to know the optimum for a particular application operating temperature.
  • the heating power / heating temperature predetermined by the coding unit can not be changed by the user on his own authority.
  • the coding unit consists essentially only of a conductor track arranged in a housing.
  • a conductor track is applied to a printed circuit board.
  • Such a coding unit designed in this case does without resistance elements, whereby a complex assembly of the coding unit with such electrical components and all associated process steps can be dispensed with.
  • a coding unit designed according to this specification preferably has at least two contact points spaced apart from one another, with which the coding unit with the hot-air blower can be electrically contacted at a special docking location.
  • the different coding of a plurality of different coding units is inventively realized in that at different coding units at least one contact point for contacting the hot air blower is arranged at a different position, ie the positions of at least one contact point in at least two different coding units not correspond.
  • Such differently coded coding contact the hot air blower, for example, designed as an evaluation or analog input of a control unit, electrical circuit or digital inputs of an electrical control unit or a microprocessor of the hot air blower at different locations and thus with appropriate design of the hot air blower, the particular maximum, Set heating power and thus the, in particular maximum, hot air temperature or limit.
  • different contact point combinations of the hot air blower or an electrical circuit of the hot air blower are selected with differently coded coding units, that is, different contact points are electrically conductively connected to one another. It is within the scope of the invention to provide a lighting means, for example an LED, for identifying the operating state on the coding unit, with such a lighting means being advantageously dispensed with.
  • One possibility for realizing two different heating powers with two differently coded coding units is that within the hot air blower at least one arranged in an electrical supply line of the heater electrical resistance is provided, which is bridged by a corresponding arrangement of the contact points, ie a corresponding coding of a first coding and by a corresponding coding, ie arrangement of contact points of the second coding unit is not bridged.
  • a corresponding arrangement of the contact points ie a corresponding coding of a first coding and by a corresponding coding, ie arrangement of contact points of the second coding unit is not bridged.
  • the at least one arranged in the hot air blower in the electrical supply line of the heater cooperating with the coding resistor to a PTC resistor to prevent an automatic heating power increase due to a decreasing resistance to device temperatures.
  • an (electronic) control unit is provided, by means of which the coding, i. in particular, the arrangement of the contact points of the coding unit can be determined, wherein the control unit is formed in accordance with the detected coding of the coding the hot air temperature and thus the heating power regulating.
  • the control unit is for detecting the coding of the coding unit electrically conductively connected to an evaluation circuit, wherein the evaluation circuit has at least one, preferably a plurality of resistors connected in series, wherein, for example, no resistor, one resistor or a plurality of resistors can be bridged, depending on the coding of the contacting with the evaluation circuit coding unit, the coding of Coding unit by means of the control unit, depending on the arrangement of the resistors can be determined by a current and / or voltage measurement.
  • the evaluation circuit forms an analog input of the control unit.
  • At least two of the series-connected resistors preferably all series-connected resistors are dimensioned differently. If, for example, three differently dimensioned resistors and four docking points are provided, there are eight different coding possibilities. With four resistors and five docking stations, sixteen different codings can be realized.
  • control unit in particular a microprocessor
  • the control unit in particular a microprocessor
  • the predetermined by the coding of the coding (binary) switching pattern specifies the adjusted heating capacity and / or heating temperature.
  • the hot air blower in which the different interconnection of digital Inputs of the control device takes place only with at least two contact points having electrical line of the coding unit. In this case, the coding is thus predetermined exclusively by the position of the contact points of the coding unit.
  • the heating device has a plurality of heating segments.
  • the heating segments are interconnected in different ways, or it is selected between single or multiple heating segments.
  • the coding of the coding units thus has an immediate effect on the selection of the heating segments used individually or in combination (preferably heating coil).
  • a plug-in opening for the coding unit is provided in a housing of the hot-air blower, into which the coding unit for releasably securing to the hot-air blower can be received at least in sections.
  • the invention also leads to a system with a previously described hot air blower and at least one releasably connectable to the hot air blower coding unit, which cooperates with the hot air blower due to their coding, in particular the maximum heating power and / or hot air temperature of the heating device in the hot air blower is predetermined.
  • the differently coded coding units are provided with a marking characterizing the intended use, such as, for example, a lettering, a symbol and / or a coloring. Additionally or alternatively, the heating power and / or heating temperature achievable with the coding unit can be indicated on the coding unit.
  • Fig. 1 a preferred embodiment of a trained as a handheld hot air blower 1 is shown.
  • the hot air blower has a housing 2 with an outlet pipe 3.
  • Within the housing 2 is a schematically indicated electric heater 4 and a schematically indicated fan 5 with an electric drive motor. 6
  • the electric drive motor 6 and the heating device 4 are supplied via a control unit 7, which is signal-conducting connected to a temperature sensor 8 with electrical energy, which is supplied to the hot air blower 1 via a connecting cable 9.
  • the control unit 7 is connected to an evaluation circuit 10, which cooperates with a coding unit 11, which is detachably receivable in an insertion opening 12 in the housing 2.
  • the coding unit 11 contacts the evaluation circuit 10 at two docking sites (electrical contacts).
  • the arrangement of the contact points of the coding unit 11 determines the coding and thus provides the heating power to be set by the control unit 7, in particular by regulating the hot air temperature.
  • Fig. 2 is a possible embodiment of a control unit 7 with an evaluation circuit 10 shown schematically.
  • a microprocessor 13 of the control unit 7 wherein the control unit 7 is connected via a connecting line 14 with a resistor 15 to a resistor series circuit of the evaluation circuit 10.
  • the Evaluation circuit 10 comprises a first, second and a third resistor 16, 17, 18, which are connected in series and are supplied with a supply voltage U b .
  • the evaluation circuit 10 has four docking points 19, 20, 21, 22 designed as printed circuit board direct connectors, with two docking points 19, 20, 21, 22 being connectable to the contact points 23, 24 (one docking location per contact point) of the coding unit 11 , Depending on the arrangement of the contact points 23, 24, one, two or three of the resistors 16, 17, 18 can be bridged, which in turn is detectable by the control unit 7, wherein the control unit in dependence of the arrangement of the contact points 23, 24, that is the coding the coding unit 11 adjusts the heating power, in particular by regulating the hot air temperature.
  • the coding unit 11 comprises as an electrical component only one arranged on a printed circuit board electrical line 25 which connects the contact points 23, 24, that is, the free ends of the electrical line 25 in an electrically conductive manner. Furthermore, the coding unit 11 advantageously includes no additional electrical components such as fixed resistors, etc.
  • Fig. 3 is a slightly modified combination between control unit 7 with evaluation circuit 10 and coding unit 11 shown. To avoid repetition is only to the differences from the embodiment according to Fig. 2 received. Concerning the similarities is on the previous figure description as well as on Fig. 2 directed.
  • the only difference from the embodiment according to Fig. 2 consists in that the coding unit 11 used is one of the coding unit 11 according to Fig. 2 has different coding. This is realized in that the two contact points 23, 24 of the coding unit 11, the one compared to Fig. 2 shorter electrical line 25 are connected to each other, are arranged at a smaller distance from each other. With the coding unit 11 according to Fig. 3 can be bridged only the first resistor 16 of the evaluation circuit by the contact points 23, 24 by detachably connecting the coding unit 11 with the hot air blower 1 with the docking points 20, 21 cooperate electrically conductive.
  • FIG. 4 an alternative embodiment is shown without electronic control unit. It can be seen that in a supply line 26 for supplying an electrical heating device 4 with electrical energy three series connected, designed as PTC resistors resistors 27, 28, 29 are arranged. A co-operating with the hot air blower 11, releasably fixable on this coding unit 11 has, as in the embodiments described above, only one electrical line 25 with two contact points not shown for clarity, with a different arrangement of the contact points 23, 24, a different number of resistors 27th , 28, 29 can be bridged, whereby the heating power is adjustable depending on the choice of a correspondingly coded coding unit 11.
  • Fig. 5 an alternative embodiment of a control unit 7 with microprocessor 13 is shown.
  • the control unit 7 or the microprocessor 13 has a plurality of digital inputs 30, 31, 32, 33 (docking points) for interacting with differently coded coding units 11.
  • the digital input 30 is supplied with a supply voltage.
  • the heating power and / or the heating temperature is predetermined, which is then controlled by the control unit, in particular by cooperation with a temperature sensor.
  • the Fig. 5 different coded coding units are shown schematically, wherein the coding by the provision of different numbers of contact points 23, 24, 33, 34 and / or the arrangement of the contact points 23, 24, 33, 34 is realized at different positions.
  • Fig. 6 an alternative embodiment of a very schematic hot air blower 1 is shown.
  • the heating device 4 comprises two heating segments (Heizwedel) 36, 37.
  • Heizwedel Heating segments
  • FIG. 6 shows that the heating device 4 comprises two heating segments (Heizwedel) 36, 37.
  • the heating elements 36, 37 can be connected in series.
  • the second coding unit only the upper heating element 36 in the drawing plane is activated.
  • the third Coding unit activates only the lower in the drawing plane heating element 37.
  • the heating elements 36, 37 are connected in parallel.

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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)
  • Electric Connection Of Electric Components To Printed Circuits (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)

Claims (14)

  1. Ventilateur d'air chaud, réalisé sous forme d'outil électrique, pour chauffer une pièce, comprenant au moins une roue de ventilateur et au moins un dispositif de chauffage électrique, caractérisé
    en ce que le ventilateur d'air chaud (1) est réalisé pour coopérer avec une unité de codage (11) pourvue d'un codage réalisé par le positionnement de points de contact pour la mise en contact électrique du ventilateur d'air chaud (1), pouvant être reliée de manière amovible au ventilateur d'air chaud (1) et pouvant être arrimée au ventilateur d'air chaud (1), laquelle unité de codage est réalisée dans le ventilateur d'air chaud (1) de manière à prédéfinir la puissance de chauffage et/ou la température d'air chaud du dispositif de chauffage (4) en fonction du codage, et en ce que différentes combinaisons de points de contact du ventilateur d'air chaud peuvent être mises en contact avec des unités de codage codées différemment.
  2. Ventilateur d'air chaud selon la revendication 1,
    caractérisé par
    la prévision d'une unité de codage (11) pourvue d'un codage, laquelle est reliée de manière amovible au ventilateur d'air chaud (1), et laquelle est réalisée dans le ventilateur d'air chaud (1) de manière à prédéfinir la puissance de chauffage et/ou la température d'air chaud du dispositif de chauffage (4) en fonction du codage.
  3. Ventilateur d'air chaud selon l'une quelconque des revendications 1 et 2,
    caractérisé
    en ce que l'unité de codage (11) comprend en tant que composant électrique exclusivement une, ou plusieurs, ligne(s) électrique(s) qui est/sont disposée (s) de préférence sur et/ou dans une carte de circuits imprimés.
  4. Ventilateur d'air chaud selon l'une quelconque des revendications précédentes,
    caractérisé
    en ce que le ventilateur d'air chaud (1) comprend au moins une résistance électrique (16, 17, 18, 27, 28, 29) pouvant être court-circuitée et/ou mise en circuit avec l'unité de codage (11).
  5. Ventilateur d'air chaud selon l'une quelconque des revendications précédentes,
    caractérisé
    en ce que plusieurs résistances électriques (16, 17, 18, 27, 28, 29) connectées en série sont prévues et, en fonction du codage de l'unité de codage (11), aucune résistance et/ou au moins une résistance (16, 17, 18, 27, 28, 29) et/ou plusieurs parmi les résistances (16, 17, 18, 27, 28, 29) (ne) peu(ven)t être court-circuitée (s) et/ou mise (s) en circuit.
  6. Ventilateur d'air chaud selon la revendication 5, caractérisé en ce qu'au moins deux des résistances (16, 17, 18, 27, 28, 29), de préférence toutes les résistances (16, 17, 18, 27, 28, 29) sont dimensionnées différemment.
  7. Ventilateur d'air chaud selon l'une quelconque des revendications 4 à 6,
    caractérisé
    en ce que l'au moins une résistance (16, 17, 18, 27, 28, 29) est ou comporte une résistance CTP.
  8. Ventilateur d'air chaud selon l'une quelconque des revendications précédentes,
    caractérisé
    en ce que le ventilateur d'air chaud (1) comprend une unité de commande (7) coopérant de préférence avec un capteur de température, laquelle est réalisée de manière à ajuster, en particulier de manière à réguler, la puissance de chauffage et/ou la température d'air chaud en fonction du codage de l'unité de codage (11).
  9. Ventilateur d'air chaud selon la revendication 8,
    caractérisé
    en ce qu'au moins une résistance (16, 17, 18, 27, 28, 29) pouvant être court-circuitée par l'unité de codage (11), de préférence plusieurs résistances (16, 17, 18, 27, 28, 29) connectées en série et pouvant être court-circuitées isolément ou par groupes par l'unité de codage (11), fait/font partie d'un circuit d'évaluation (10) relié à l'unité de commande (7) pour déterminer le codage de l'unité de codage (11).
  10. Ventilateur d'air chaud selon la revendication 8,
    caractérisé
    en ce que l'unité de commande comprend plusieurs entrées numériques pour coopérer avec l'unité de codage (11), l'unité de commande (7) étant de préférence réalisée pour identifier le codage de l'unité de codage (11) et par conséquent la puissance de chauffage et/ou la température d'air chaud souhaitée(s) en fonction du nombre de points de contact mis en contact par l'unité de codage (11).
  11. ventilateur d'air chaud selon l'une quelconque des revendications précédentes,
    caractérisé
    en ce que le dispositif de chauffage (4) comprend plusieurs segments de chauffage (36, 37), les segments de chauffage (36, 37) pouvant être connectés les uns aux autres de différentes manières en fonction et/ou au moyen du codage de l'unité de codage (11) et/ou au moins l'un des segments de chauffage (36, 37) pouvant être sélectionné en fonction et/ou au moyen du codage de l'unité de codage (11).
  12. Ventilateur d'air chaud selon l'une quelconque des revendications précédentes,
    caractérisé
    en ce que l'unité de codage (11) peut au moins partiellement être reçue, en particulier peut être fixée de manière amovible, dans une ouverture d'enfichage (12).
  13. Système comprenant un ventilateur d'air chaud selon l'une quelconque des revendications précédentes et comprenant au moins une unité de codage (11) pouvant être reliée de manière amovible au ventilateur d'air chaud (1), laquelle est réalisée dans le ventilateur d'air chaud (1) de manière à prédéfinir la puissance de chauffage et/ou la température d'air chaud du dispositif de chauffage (4) en fonction de son codage, différents moyens d'identification identifiant l'application envisagée respective étant prévus sur des unités de codage (11) présentant différentes codages, et les différents codages étant réalisés, de préférence exclusivement par des points de contact (23, 24) disposés en différentes positions pour la mise en contact électrique du ventilateur d'air chaud (1) en différentes positions.
  14. Système selon la revendication 13,
    caractérisé
    en ce qu'au moins deux unités de codage (11) avec un codage différent pour des applications envisagées différentes du ventilateur d'air chaud (1) sont prévues.
EP08016096.3A 2007-09-24 2008-09-12 Ventilateur d'air chaud ainsi que système doté d'un ventilateur d'air chaud et d'au moins une unité de codage Not-in-force EP2040012B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202007013430U DE202007013430U1 (de) 2007-09-24 2007-09-24 Heißluftgebläse sowie System mit einem Heißluftgebläse und mindestens einer Kodiereinheit

Publications (3)

Publication Number Publication Date
EP2040012A2 EP2040012A2 (fr) 2009-03-25
EP2040012A3 EP2040012A3 (fr) 2013-11-13
EP2040012B1 true EP2040012B1 (fr) 2014-12-17

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Country Link
US (1) US8103154B2 (fr)
EP (1) EP2040012B1 (fr)
DE (1) DE202007013430U1 (fr)

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DE202011052043U1 (de) * 2011-11-21 2012-02-09 Leister Technologies Ag Heißlufthandgerät mit einer digitalen Bedieneinrichtung mit Universal-Bedienelement
DE202012102212U1 (de) 2012-06-15 2013-09-18 Steinel Gmbh Heissluftgebläse
TWI704961B (zh) * 2017-01-06 2020-09-21 致伸科技股份有限公司 智能熱風槍
DE202017103466U1 (de) 2017-06-09 2017-07-26 Leister Technologies Ag Heißlufthandgerät mit berührungsloser Benutzerkommunikationsschnittstelle
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Also Published As

Publication number Publication date
EP2040012A2 (fr) 2009-03-25
US8103154B2 (en) 2012-01-24
US20090080872A1 (en) 2009-03-26
EP2040012A3 (fr) 2013-11-13
DE202007013430U1 (de) 2009-02-12

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