EP2604947A2 - Appareil manuel à air chaud équipé d'un dispositif de commande numérique avec élément de commande universel - Google Patents

Appareil manuel à air chaud équipé d'un dispositif de commande numérique avec élément de commande universel Download PDF

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Publication number
EP2604947A2
EP2604947A2 EP12401206.3A EP12401206A EP2604947A2 EP 2604947 A2 EP2604947 A2 EP 2604947A2 EP 12401206 A EP12401206 A EP 12401206A EP 2604947 A2 EP2604947 A2 EP 2604947A2
Authority
EP
European Patent Office
Prior art keywords
hot air
universal
air handler
control
handler according
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.)
Granted
Application number
EP12401206.3A
Other languages
German (de)
English (en)
Other versions
EP2604947B1 (fr
EP2604947A3 (fr
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
Original Assignee
Leister Technologies AG
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 Leister Technologies AG filed Critical Leister Technologies AG
Publication of EP2604947A2 publication Critical patent/EP2604947A2/fr
Publication of EP2604947A3 publication Critical patent/EP2604947A3/fr
Application granted granted Critical
Publication of EP2604947B1 publication Critical patent/EP2604947B1/fr
Active 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
    • F24H3/002—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 which forms a rod-shaped handle provided with air inlet openings, and with a projecting from the handle portion metallic air guide tube which defines an air duct 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 part, an electronic control for each one 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.
  • 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 discloses a handleable hot air generator for welding or molding of plastic articles, wherein serving as a handle tubular housing as Air duct is formed, which continues in a casing extending the metal tube.
  • 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.
  • 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 hand device for generating a hot air flow has an electronic control, which is designed as a microprocessor control, an operating device designed as a digital control device is as well as 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 on and / or switching off the device and 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 preferably 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 inadvertently.
  • 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.
  • further detection means for current and / or voltage which are optionally provided for the fan or the heating element, their proper functioning 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 in addition to the air quantity - and the temperature display symbols that are activated, for example in software locking the universal control element, defective heating element, overheating of the heating element, normal and / or undervoltage on 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 remote from the handle part 2 an air outlet opening 5, wherein 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 actuating possibilities of the universal operating element 10 '.
  • the universal operating element 10 ' is formed in the axial direction as a button, as the figures 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 operating element 10 ' is rotatable in both possible directions of rotation in the circumferential direction.
  • 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.
  • 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)
EP12401206.3A 2011-11-21 2012-10-17 Appareil manuel à air chaud équipé d'un dispositif de commande numérique avec élément de commande universel Active EP2604947B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202011052043U DE202011052043U1 (de) 2011-11-21 2011-11-21 Heißlufthandgerät mit einer digitalen Bedieneinrichtung mit Universal-Bedienelement

Publications (3)

Publication Number Publication Date
EP2604947A2 true EP2604947A2 (fr) 2013-06-19
EP2604947A3 EP2604947A3 (fr) 2015-06-24
EP2604947B1 EP2604947B1 (fr) 2017-03-01

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EP12401206.3A Active EP2604947B1 (fr) 2011-11-21 2012-10-17 Appareil manuel à air chaud équipé d'un dispositif de commande numérique avec élément de commande universel

Country Status (4)

Country Link
US (1) US8948577B2 (fr)
EP (1) EP2604947B1 (fr)
CN (1) CN103134191B (fr)
DE (1) DE202011052043U1 (fr)

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Also Published As

Publication number Publication date
EP2604947B1 (fr) 2017-03-01
EP2604947A3 (fr) 2015-06-24
US20130129328A1 (en) 2013-05-23
DE202011052043U1 (de) 2012-02-09
US8948577B2 (en) 2015-02-03
CN103134191B (zh) 2016-02-10
CN103134191A (zh) 2013-06-05

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