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EP1491071B1 - Dispositif de chauffage a element chauffant flexible - Google Patents

Dispositif de chauffage a element chauffant flexible Download PDF

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Publication number
EP1491071B1
EP1491071B1 EP03743805A EP03743805A EP1491071B1 EP 1491071 B1 EP1491071 B1 EP 1491071B1 EP 03743805 A EP03743805 A EP 03743805A EP 03743805 A EP03743805 A EP 03743805A EP 1491071 B1 EP1491071 B1 EP 1491071B1
Authority
EP
European Patent Office
Prior art keywords
heating
circuit
control member
connection
actuating
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.)
Expired - Lifetime
Application number
EP03743805A
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German (de)
English (en)
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EP1491071A1 (fr
Inventor
Ernst Merk
Ralf KÖHLER
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.)
Beurer GmbH and Co
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Beurer GmbH and Co
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Publication of EP1491071A1 publication Critical patent/EP1491071A1/fr
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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • H05B1/0272—For heating of fabrics
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0288—Applications for non specified applications
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
    • H05B3/342—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heaters used in textiles

Definitions

  • the invention relates to a heating device with one in a flexible Radiator integrated and connected via a connection cable to a supply voltage connectable electrical Walkerleiteranaku, one with this and others Elements including a control element for a heating current formed heating circuit and with one for varying the heating current and regulating the temperature the control element connected control circuit.
  • Such a heating device is given approximately in EP 0 562 850 A2, in particular, a circuit for protecting in the flexible radiator integrated electrical Schuleiteranaku before an excess temperature goes.
  • the drive circuit provided in this case also has a temperature control circuit on, with for maintaining a desired temperature a heating current via a control member in the form of a thyristor e.g. by means of Phase control is varied.
  • a control member in the form of a thyristor e.g. by means of Phase control is varied.
  • other embodiments of the Control member such as a mechanical, thermal or other electronic Switches are called.
  • a control with pulse packets is also conceivable.
  • the invention is based on the object, a heater of the aforementioned Kind of providing, in particular with regard to a safe Control and monitoring of the heating circuit offers advantages.
  • the safety circuit has a fault sensor device and in that in the heating circuit a controllable via the safety circuit additional Control member is arranged in series with the first control member, wherein the safety circuit also responds only to a fault of the drive circuit and the heating current interrupts by driving the additional control member.
  • the security circuit has a rating section that communicates with a drive part of the drive circuit or with the heating circuit for tapping at least one characteristic signal state or more characteristic Signal state changes is in electrical communication, and that the safety circuit is formed such that upon detection of the at least one characteristic signal state or the characteristic signal state changes the additional control element for interrupting the heating current drives.
  • the measures are furthermore advantageous, that the drive part is designed as a digital circuit part and the signal state or the signal state change at least one digital signal affect.
  • a secure detection is supported by the fact that the signal state or the Signal state change of two separate, in normal mode complementary or is tapped in the normal state of the same signals by means of the safety circuit.
  • a vorteihafter structure results from the fact that the at least one digital Signal on at least one output terminal of the digital circuit part is tapped.
  • a simple circuit construction is e.g. obtained by that between the Output terminal and the additional control element, a circuit part only is arranged with a capacitor and a resistor.
  • the safety circuit as evaluation part has a transistor stage, the input side with a base connection and with an emitter connection or collector connection for picking up the at least one signal state or the signal state changes connected to two separate terminals of the control part is and on the output side via the collector terminal or the emitter terminal with a control terminal of the additional control element for its activation in Connection stands.
  • the transistor can be a bipolar transistor or a Field effect transistor, in which case the base terminal, emitter terminal and subsequentlyoranschuss the gate terminal, drain or source connection correspond.
  • Another semiconductor circuit arrangement is conceivable, for example with CMOS logic or analog switches.
  • a further favorable for the function embodiment of the heater results in that the signal state or the signal state change in the Heating circuit or in one of the drive part leading to the first control member Control branch is tapped.
  • An advantageous structure consists in that the safety circuit as Assessment part has a transistor stage, the input side with its base terminal is connected to the heating circuit or the Anêtzweig and on the output side with its emitter connection or collector connection at the control connection the additional control member is connected.
  • the drive circuit further for tapping one of the Temperature of Walkerleiteranssen dependent electrical parameter over a Coupling branch is coupled to the heating circuit and a control circuit with a digitizer a digital circuit arrangement for driving the control member as a function of a deviation between an actual value and a nominal value and that the drive circuit is designed such that the drive of the control member for adjusting a set temperature of the radiator the basis of digital data formed in the digitizer stage.
  • the measured variable means a voltage divider formed in the heating circuit is tapped on the one hand with a temperature-dependent resistor forming Bankleiteran instructive action.
  • the anyway existing Schuleiteran accent is also used as a temperature sensor.
  • a favorable structure of the drive circuit, in particular of the control loop results in that the measured variable is fed via a feed branch to one of the digitizing stage upstream analog timer with a resistor / capacitor circuit fed to the digitizer stage for forming a digital Actual value has a timing element and the digital actual value of an actual time to for reaching a predetermined or predefinable charging voltage of the capacitor corresponds to the setpoint value specified in the digitizing stage as setpoint value or is predeterminable, and that for heating the control of the control member as a function of a deviation of the actual time value from the setpoint time value he follows.
  • connection points lie within a cord switch housing.
  • a heating device with a flexible radiator 1, e.g. in Form of an electric blanket, a heating pad or heat blanket, in which a Schuleiteran Aunt 1.1 integrated and a fuse F1 are housed, and with a force acting on a heating circuit 3 drive circuit 2, with a heating current iH flowing through the heating circuit 3 with the heating conductor arrangement 1.1 Adjustment of a desired temperature is variable.
  • a desired temperature is variable.
  • To the electromagnetic Field regulation can thereby heat conductors with one in one direction of the current arranged inner conductor and arranged in the opposite direction External conductor be connected, as is known.
  • the to a supply voltage UV for example, a mains voltage, another transformed voltage or DC voltage, connected and via Switch S1, S2 of this separable heating circuit 3 has following the Schuleiteran accent 1.1 and the fuse F1 two consecutive Control elements THY2 and THY1 in the form of thyristors or triacs or others Semiconductor switches or electronically actuated mechanical contacts as well a voltage divider resistor R21 connected to its from the control member THY1 remote terminal is connected to ground and with the Schuleiteran accent 1.1 forms a voltage divider.
  • the heating conductors Rhz1, Rhz2 of the heating conductor arrangement 1.1 are preferably melted by means of a melting at a suitable temperature Isolator insulated from each other and as an inner conductor and outer conductor of a heating cord interconnected, as known per se, which also compensates of the electromagnetic field is reached.
  • the heating conductor arrangement 1.1 is on e.g. two connection points A, B in the edge region of the flexible radiator 1 or on a short piece of cable with a plug / coupling unit in the heating circuit 3 releasably coupled or connected via this with fixed connection cables.
  • the fuse F1 can also outside the flexible radiator 1 in the Heating circuit 3, for example, be arranged the plug / coupling unit.
  • the Heating conductor Rhz1, Rhz2 have a temperature-dependent resistance, for example with a positive temperature coefficient (PTC effect) or negative Temperature coefficient (NTC effect), so that together with the voltage dividing resistor R21 voltage divider is temperature dependent.
  • PTC effect positive temperature coefficient
  • NTC effect negative Temperature coefficient
  • Several Heating circuits 3 may be provided in parallel or in series, wherein in the radiator 1 are arranged according to several heating cords.
  • the drive circuit 2 is connected via a coupling branch 5 for tapping by means of Voltage divider from the voltage divider resistor R21 and the Schuleiteranssen 1.1 formed partial voltage and a Anberichtg 9 to a Control input of the control member THY1 connected and has one via a Power supply 4 powered digital circuitry 2.1, for example as a microcomputer, microcontroller, special integrated circuit arrangement (ASIC), CMOS gates or the like is formed, and further in a charging branch 7 and setpoint branch 6 integrated timer from a resistor / capacitor circuit R7, C6 and a lying on the supply voltage UV another voltage divider 8 with fixed resistors R12, R15 and an adjustable Resistor P1, wherein in the positive potential terminal to the supply voltage UV another diode D2 is inserted in the forward direction.
  • the further diode D2 is arranged so that the entire drive circuit 2 is connected via this to the supply voltage UV.
  • the further voltage divider 8 is between the two fixed resistors R12, R15 for forming the set value branch 6 one with the adjustable resistor in the form of the potentiometer P1 adjustable partial voltage tapped accordingly a desired temperature of the radiator 1 is selectable.
  • the potentiometer P1 lies between the ground-side fixed resistor R15 and Mass Gnd.
  • the tapped at the other voltage divider 8 partial voltage is connected to the digital circuitry 2.1 to open and close to a connection switch connected controllable switch S3 to the Capacitor C6 applied.
  • the capacitor C6 is thus with its one port via the charging resistor R7 for charging to the positive pole of the supply voltage UV and with its other connection over the controllable Switch S3 and the fixed resistor R15 and the potentiometer P1 for forming the setpoint branch 6 connected to ground, wherein the setpoint branch 6 for Forming a setpoint temporarily by means of the controllable switch S3 accordingly a set in the digital circuitry 2.1 Anêtalgorithmus can be closed.
  • the connected to the charging resistor R7 Connection of the capacitor C6 is also for detecting a charging voltage with an input terminal of the digital circuit arrangement 2.1 for detecting the charging voltage and feeding connected to a digitizer stage 2.11 while the other terminal of the capacitor C6 preferably to a discharge port (Discharge) of the digital circuitry 2.1 is connected, to perform a controlled complete discharge of the capacitor C6. moreover is this other terminal of the capacitor C6 via the coupling branch 5 with a resistor R14 for picking up the divided voltage across the resistor R21 of the heating circuit 3, i.
  • the Anberichtg 9 includes a resistor R11 and R11 is connected to a control terminal Trig1 of the digital circuitry 2.1 connected to a temperature control of the radiator 1 in dependence to perform a setpoint / actual value comparison, using the digital circuit arrangement 2.1 appropriate control algorithms given or can be programmed.
  • the discharge connection Discharge can also be omitted.
  • partial stresses can generate over the resistors R7 and R12, also corresponding from the load circuit (heating) separate DC voltages are applied, so that the resistors R7 and R12 are saved.
  • different Setpoints are also specified in the digital circuit arrangement and via assigned connections are tapped, which contacted by means of switch suitable can be. This allows the resistors R12, R15, P1 and replace the switch S3. The specification of the setpoint then does not take place via the changed resistance P1, but by means of changeover. For example, for that a temperature-stabilized time clock or a reference time in the digital Circuit arrangement 2.1 are provided.
  • the digital circuit 2.1 is connected via a terminal Vcc the power supply 4 and by means of a ground terminal Gnd to ground potential placed.
  • a synchronization connection Sync further connections the digital circuit arrangement 2.1 with the power supply 4, wherein at the Sync terminal Sync a resistor R2 and to the display terminal Qty a display, for example in the form of a LED display LED and a Resistor assembly R3 are connected.
  • the power supply 4 in turn is on the one hand to ground and on the other hand via a resistor R1 and the another diode D2 at the supply voltage UV.
  • control member THY2 can thereby according to the control member THY1 as a thyristor or other electronic or electronically controllable switch may be formed or may be a form separate or an integrated part of the control member THY1.
  • the safety circuit 10 has a transistor stage with a PNP transistor T2 on, with its base via an RC element to a first safety connection Trig 2, with a base resistor R10 at the base and a second capacitor C5 is connected to the safety connection Trig 2, and that with his Emitter to one to the first complementary second security port Out the digital circuitry 2.1 is connected. With the collector is the Transistor T2 via a control resistor R13 to a control terminal of the additional Control member THY2 connected.
  • the function sequence for the temperature control will be described with reference to the in Fig. 1 shown heater and shown in Fig. 3 charging curves of the capacitor C6 explained in more detail, from which a reference value, the actual value at different Temperatures of Schuleiteranssen 1.1 and the setpoint derived become.
  • the reference value, the setpoint and the actual value are each made from Charging curves of the capacitor C6 determined on different circuits, which are controlled by means of the digital circuit arrangement 2.1, wherein the Charging times of the capacitor C6 to a certain charging voltage by means of a provided in the digital circuitry 2.1 digitizer 2.11 be determined.
  • digital circuitry 2.1 is a digital Timer provided with a fixed time clock and a counter.
  • the Mains voltage is, the capacitor C6 via the connections Actual / Ref and Discharge completely discharged.
  • the sync terminal Sync becomes a zero voltage crossing each positive half - wave detected and after the zero crossing starts the Charging of the capacitor C6 in response to the resistors R7, R14, R21 and the other diode D2 until a digital switching level at the reference input the digital circuit arrangement 2.1 is reached.
  • the charging time of Fig. 2 is e.g. 5.8 ms, which forms the reference value.
  • the controlled switch S3 is not activated, remains thus open, whereas the control element THY1 is actuated, i. the heating circuit 3 is closed is. Due to the flow of current through the formed by the heating conductors Heating resistors Rhz1 and Rhz2, the fuse F1, the diode D01, the control member THY1 and the voltage divider resistor R21 creates a temperature-proportional Voltage drop U21 at the voltage divider resistor R21. For example, the partial voltage in the form of the voltage drop U21 at 20 ° C heating conductor temperature approx. 1 V (peak of the positive sine half-wave) and at maximum temperature (80 ° C) approx. 0.7 V.
  • Partial voltage U21 Due to the parallel increase of the positive charging voltage to the charging resistor R7 and the raising by means of Partial voltage U21 shortens the charging process on the capacitor C6 to Reaching the switching level on a charging time or an actual time value of about 4.7 ms at 20 ° C. Changes due to the heating of the heating element assembly 1.1 to 70 ° C due to the PTC effect, the partial voltage U21 to about 0.75 V in the maximum of Sine half-wave, so the charging of the capacitor C6 takes about 5.0 ms.
  • Control member i. with the heating circuit 3 open and on, i. closed controllable switch S3, the charging voltage of the capacitor C6 at maximum Temperature setting (80 ° C) by potentiometer P1 by approx. 0.7V (Maximum of positive half-wave) raised. This corresponds to the partial voltage U21 at maximum temperature. This results in a capacitor C6 Charging time up to the switching level of 5.1 ms (set time value at 80 ° C).
  • the setpoint branch 6 results from the components further diode D2, resistor R7, Capacitor C6, controllable switch S3, resistor R15 and adjustable resistor P1 in conjunction with the resistor R12 of the further voltage divider 8, wherein the controllable switch S3 by means of the digital circuit arrangement 2.1 is controlled via the connection switch.
  • the reference value is first determined, After that, the setpoint and the actual value become the set time value and the actual time value certainly.
  • the setpoint and the actual value become the set time value and the actual time value certainly.
  • the control of the control member THY1 is interrupted and a Pause time of about 1 s inserted.
  • the reference, setpoint and Actual value determined within 3 mains half-waves.
  • the comparison of setpoint and actual value in the digital circuitry 2.1 be fed to other control algorithms to the Heating current iH in the heating circuit 3 via the control member THY1 as a function of a desired temporal temperature behavior and / or depending on the type of flexible radiator 1, for example, a blanket, a Heat pad or heat bed to perform.
  • a suitable control algorithm can be easily programmed, in particular, safety regulations are taken into account can.
  • One way of controlling temperature is to increase the setpoint and realize a guided setpoint reduction to a nominal value. conditioned by the thermal delay of the increase of the surface temperature of the radiator 1 on the Schuleitertemperatur due to poor heat conduction of Materials of the flexible heater 1 is e.g. desirable, the temperature rise to improve.
  • One solution to this is to set one after the Switching on the heater time-based increase of a setpoint temperature. To increase the surface temperature of an already preheated radiator to reach the setpoint for the control by an optimized Procedure specified. This can be done by determining the difference between Setpoint and actual value and a calculated temporary re-heating dependent thereon after reaching the setpoint temperature. Alternatively, a can calculated higher setpoint value for the control, e.g.
  • the setpoint / actual value difference When switching on, a large setpoint increase is defined. The Elevation is then e.g. as long as constant or changed, until the Actual value coincides with the excessive setpoint. Then one starts out the setpoint overshoot derived temperature gradation. In this way results the advantage that the surface temperature shows no break-in. Is on the other hand the setpoint / actual value difference at switch-on is the same as a current one Operation, so no setpoint increase and no guided setpoint reduction carried out at nominal value. Corresponding parameters for the assessment the setpoint / actual value difference can be in the digital circuit arrangement 2.1 are stored. Depending on the type of flexible radiator 1, e.g.
  • heating pads, Heat underblankets or thermal blankets can also be a different calculation method be provided for the setpoint increase. This can e.g. by evaluation of a stored software or by programmed digital inputs or by time-controlled connection or switching to one other setpoint level can be realized.
  • the measured reference value of the charging time be compared with the setpoint and / or the actual value and on the basis of the comparison result due to previously known or stored or entered Values indicate an error of the electronics, e.g. Short circuit in the control member THY1 or be detected in connection with the controllable switch S3.
  • the display can range from a simple light up be designed for a variable display, wherein the control means the digital circuitry 2.1 different, e.g. as a flashing warning display or may be acoustically formed.
  • the shutdown of the heater can by means of single or multiple timer take place, with switch-off fixed or separately switchable integrated can.
  • a temperature reduction by appropriate Programming the digital circuitry 2.1 be provided to Skin burns due to constantly high surface temperatures of the radiator to avoid.
  • a time-dependent Setpoint grading or even shutdown of the heater provided be.
  • the display device in this case for example as a display unit LED indicated, the different operating states of the heating devices, e.g. Setpoint reduction, timeout or the like.
  • a user to various Way, e.g. by means of color, numbers, symbols, texts or the like. Flashing operation, changing colors, flash display or similar can be provided be and also a sound, voice or vibration display can be realized.
  • a vibration alarm can be in the radiator or a cord switch, for example be provided until lowering the setpoint temperature, e.g. through recurring Operation a falling asleep of the user during critical phases avoid.
  • the safety circuit 10 shown in Fig. 1A detects the states at the safety terminals Trig 2 and Out, with the states adjacent to them digital signals are always complementary to each other and on a dynamic Control based.
  • the control signals are at the terminals Trig 1 and Out to logical zero and to the Trig 2 connection to logical One level.
  • the complementary and dynamic control of the outputs on the Out and Trig 2 outlets has the advantage that in case of failure of the digital circuitry 2.1, in particular in the form of a microcontroller in the static permanent reset state, in which all outputs are usually at one, or when a stop Program counter the heating current iH always interrupted, i.
  • the heating is switched off becomes.
  • the activation of the additional control element THY2 should only be maximum 250 ⁇ s after a zero crossing of the drive signal.
  • the heater shown in Figs. 1B and 2 operates except for the safety circuits 10 'and 10 ", respectively, according to the heater of Fig. 1A and in this respect is also structured accordingly.
  • the safety circuit 10 'of FIG. 1B is similar in construction to the one of FIG Safety circuit 10 acc. Fig. 1A, however, it is assumed that at the safety outlets Out and Trig 2 same signal states of the digital Signals are present, the control is also dynamic.
  • the Transistor T2 ' designed as bipolar NPN transistor T2', wherein the collector to the out port is connected while the emitter is connected via the control resistor R13 the control terminal of the additional control member THY2 is connected.
  • the Base of the transistor T2 ' is according to the embodiment of FIG. 1A via an RC element at the other safety connection Trig 2.
  • the safety circuit 10 ' accordinging to FIG. 1B carries a digital circuit arrangement 2.1 Invoice in which a reset state does not affect all logic elements extends. For example, this may be the case when the drive circuit 2 separate circuit parts for the control of the control member THY1 and the additional control member THY2 in the digital circuitry has.
  • the safety circuit has a Evaluation part with a transistor T1, for example in the form of a bipolar NPN transistor on.
  • the collector terminal is connected to a supply voltage Vcc, for example, from the supply voltage Vcc of the power supply 4 is tapped while the emitter terminal as in the embodiment According to Fig. 1B via a drive resistor R13 to the control terminal of in connected to the heating circuit 3 additional control member THY2 is connected.
  • the Base of the transistor T1 is connected via a charge branch 11 with charging resistors R5, R10 'and a diode D4 connected to the supply voltage UV of the heater, wherein between the charging resistors R5 and R10 'a connection point between the control member THY1 and the additional control member THY2 the heating circuit 3 is connected.
  • the diode D4 is located with its anode on the Charging resistor R10 'and with its cathode at a connection point of the base branch, where the base is connected via a base resistor R4 and Furthermore, a (negative) pole of another capacitor C1, the anode of a another diode D3 and connected to ground another resistor R3 connected are.
  • the (positive) terminal of the further capacitor C1 and the Cathodes of the other diode D3 are connected to the supply voltage Vcc.
  • the safety circuit 10 "of FIG. 2 is constructed as a kind of watchdog and is based on a dynamic control of the control element THY1, the actual Load switch for the heating circuit 3, in a certain duty cycle of e.g. 95% on and 5% off on a period of a few, e.g. between one and ten seconds.
  • the safety circuit 10 "with the in the Heating circuit 3 lying additional control element THY2 is located (usually) in A condition. If a continuous activation occurs in the temperature control circuit due to the error of the control member THY1, the safety circuit recognizes 10 "with its evaluation part this state and switches the additional control element THY2 off.
  • the safety circuit 10 "works as follows: Normally is the control element THY1 for the temperature control in the ON state.
  • the extra Control element THY2 is also in the on state, since the negative pole the further capacitor C1 to almost the supply voltage Vcc of the digital Circuit arrangement is 2.1 and the transistor T1 via the resistor R4 is driven and thus the drive current for the additional control element THY2 can flow.
  • the other diodes D3 and D4 block. During the one-time from e.g. 95% is now a transhipment of the other capacitor C1, i.
  • the transistor T1 is turned on and switches the additional control element THY2 on. Thereafter, the off-time of e.g. 5% of the control element THY1, and the Voltage at the negative pole of the further capacitor C1 is restored almost the supply voltage Vcc (5V) via the charging resistors R5, R10 ' and the other diode D4 charged. That means that the additional control member THY2 always stays on.
  • the further diode D3 prevents the Voltage at the negative pole of the further capacitor C1 becomes more positive than the positive pole.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Resistance Heating (AREA)
  • Control Of Temperature (AREA)

Claims (14)

  1. Dispositif de chauffage comprenant un ensemble (1.1) de conducteurs chauffants électriques, intégré dans un élément chauffant flexible (1) et pouvant être connecté à une tension d'alimentation (UV) par l'intermédiaire d'un câble de raccordement ; un circuit de chauffage (3) formé par ledit ensemble et par d'autres éléments, y compris un premier organe de commande (THY1) affecté à un courant de chauffage (iH) ; et un circuit d'activation (2) équipé d'un circuit de sûreté (10, 10') et raccordé au premier organe de commande (THY1), en vue de faire varier le courant de chauffage (iH) et de réguler la température,
    caractérisé par le fait que le circuit de sûreté (10, 10') présente un système détecteur d'erreurs ; et
    par le fait qu'un organe additionnel de commande (THY2), branché en série avec le premier organe de commande (THY1) et pouvant être activé par l'intermédiaire du circuit de sûreté (10, 10'), est disposé dans le circuit de chauffage (3), ledit circuit de sûreté (10, 10', 10") réagissant également ou uniquement à une erreur du circuit d'activation (2), et interrompant le courant de chauffage (iH) par activation de l'organe additionnel de commande (THY2).
  2. Dispositif de chauffage selon la revendication 1,
    caractérisé par le fait que le circuit de sûreté (10, 10', 10") comporte une partie d'évaluation qui est en liaison électrique avec une partie d'activation (2.1) du circuit d'activation (2) ou avec le circuit de chauffage (3), en vue de saisir au moins un état de signal caractéristique ou des variations d'états de signaux caractéristiques ; et
    par le fait que le circuit de sûreté (10, 10', 10") est réalisé de telle sorte qu'il active l'organe additionnel de commande (THY2), lors de la détection de l'état de signal caractéristique prévu au minimum, ou des variations d'états de signaux caractéristiques, en vue d'interrompre le courant de chauffage (iH).
  3. Dispositif de chauffage selon la revendication 2,
    caractérisé par le fait que la partie d'activation est réalisée sous la forme d'une partie de commutation numérique (2.1), et l'état de signal ou la variation d'état de signal concerne au moins un signal numérique.
  4. Dispositif de chauffage selon la revendication 2 ou 3,
    caractérisé par le fait que l'état de signal ou la variation d'état de signal de deux signaux distincts, complémentaires en service normal ou identiques à l'état normal, est saisi(e) au moyen du circuit de sûreté (10, 10').
  5. Dispositif de chauffage selon la revendication 3 ou 4,
    caractérisé par le fait que le signal numérique prévu au minimum est saisi sur au moins un raccord de sortie (Out, Trig 2) de la partie de commutation numérique (2.1).
  6. Dispositif de chauffage selon la revendication 5,
    caractérisé par le fait qu'une partie de commutation, comprenant un condensateur (C5) et une résistance (R10), est interposée entre le raccord de sortie (Trig 2) et l'organe additionnel de commande (THY2).
  7. Dispositif de chauffage selon l'une des revendications 2 à 5,
    caractérisé par le fait que le circuit de sûreté (10, 10') comporte, en tant que partie d'évaluation, un étage transistor qui est connecté côté entrée, par un raccord de base et par un raccord d'émetteur ou un raccord de collecteur, en vue de saisir l'état de signal prévu au minimum ou les variations d'état de signaux, à deux raccords distincts (Out, Trig 2) de la partie d'activation (2.1) ; et qui, côté sortie, est en liaison avec un raccord de commande de l'organe additionnel de commande (THY2) par l'intermédiaire du raccord de collecteur ou du raccord d'émetteur, en vue de l'activation dudit organe, ou présente un autre ensemble de commutation semi-conducteur.
  8. Dispositif de chauffage selon la revendication 2, 3 ou 4,
    caractérisé par le fait que l'état de signal, ou la variation d'état de signal, est saisi(e) dans le circuit de chauffage (3) ou dans une branche d'activation (9) s'étendant depuis la partie d'activation (2.1) jusqu'au premier organe de commande (THY1).
  9. Dispositif de chauffage selon la revendication 8,
    caractérisé par le fait que le circuit de sûreté (10") comporte, en tant que partie d'évaluation, un étage transistor qui est connecté côté entrée, par son raccord de base, au circuit de chauffage (3) ou à la branche d'activation (9) ; et est connecté côté sortie, par son raccord d'émetteur ou son raccord de collecteur, au raccord de commande de l'organe additionnel de commande (THY2).
  10. Dispositif de chauffage selon l'une des revendications précédentes,
    caractérisé par le fait que le circuit d'activation (2) est, par ailleurs, couplé au circuit de chauffage (3) par l'intermédiaire d'une branche de couplage (5), en vue de saisir une grandeur de mesure électrique dépendant de la température de l'ensemble (1.1) de conducteurs chauffants électriques, et présente un circuit de régulation muni d'un étage de numérisation (2.11) d'un ensemble de commutation numérique (2.1), en vue d'activer l'organe de commande (THY1) en fonction d'un écart entre une valeur réelle et une valeur de consigne ; et
    par le fait que le circuit d'activation (2) est réalisé de façon telle que l'activation de l'organe de commande (THY1), en vue de réguler une température réglée de l'élément chauffant (1), s'opère sur la base de données numériques formées dans l'étage de numérisation (2.11).
  11. Dispositif de chauffage selon la revendication 10,
    caractérisé par le fait que la grandeur de mesure est saisie au moyen d'un diviseur de tension qui est ménagé dans le circuit de chauffage (3) et est formé, d'une part, par l'ensemble (1.1) de conducteurs chauffants électriques matérialisant une résistance tributaire de la température et, d'autre part, par au moins un élément résistif (R21) ;
    par le fait que la grandeur de mesure est délivrée, par l'intermédiaire d'une branche de délivrance (5), à un organe temporisateur analogique branché en amont de l'étage de numérisation (2.11), avec un circuit résistance/condensateur (R7, C6) ;
    par le fait que l'étage de numérisation (2.11) présente un organe de chronométrage en vue de former une valeur réelle numérique, et ladite valeur réelle numérique correspond à une valeur temporelle réelle jusqu'à l'obtention d'une tension de charge du condensateur (C6), préétablie ou pouvant être préétablie ;
    par le fait qu'une valeur temporelle de consigne est ou peut être préétablie, dans l'étage de numérisation (2.11), en tant que valeur de consigne ; et
    par le fait que l'activation de l'organe de commande (THY1), en vue du chauffage, s'opère en fonction d'un écart entre la valeur temporelle réelle et la valeur temporelle de consigne.
  12. Dispositif de chauffage selon l'une des revendications précédentes,
    caractérisé par le fait qu'un fusible (F1) se trouve dans le circuit de chauffage (3), sur l'élément chauffant (1) ou à l'extérieur de celui-ci.
  13. Dispositif de chauffage selon l'une des revendications précédentes,
    caractérisé par le fait que l'ensemble (1.1) de conducteurs chauffants électriques présente uniquement deux extrémités de conducteurs chauffants qui sortent de l'élément chauffant (1) et sont reliées à des points de connexion (A, B) avec un conducteur de raccordement à deux brins, directement par l'intermédiaire d'une unité d'accouplement à fiche bipolaire, ou d'une connexion "hot lead".
  14. Dispositif de chauffage selon la revendication 13,
    caractérisé par le fait que les points de connexion (A, B) sont situés à l'intérieur d'un boítier de commutation intermédiaire par cordon.
EP03743805A 2002-03-14 2003-02-15 Dispositif de chauffage a element chauffant flexible Expired - Lifetime EP1491071B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10211114A DE10211114A1 (de) 2002-03-14 2002-03-14 Heizvorrichtung mit flexiblem Heizkörper
DE10211114 2002-03-14
PCT/EP2003/001533 WO2003077597A1 (fr) 2002-03-14 2003-02-15 Dispositif de chauffage a element chauffant flexible

Publications (2)

Publication Number Publication Date
EP1491071A1 EP1491071A1 (fr) 2004-12-29
EP1491071B1 true EP1491071B1 (fr) 2005-11-30

Family

ID=7714097

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03743805A Expired - Lifetime EP1491071B1 (fr) 2002-03-14 2003-02-15 Dispositif de chauffage a element chauffant flexible

Country Status (4)

Country Link
US (1) US20050109752A1 (fr)
EP (1) EP1491071B1 (fr)
DE (3) DE10211114A1 (fr)
WO (1) WO2003077597A1 (fr)

Cited By (2)

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DE102008006017A1 (de) 2008-01-25 2009-08-06 Beurer Gmbh Schmiegsames Wärmegerät
DE102009008530A1 (de) 2009-02-11 2010-10-07 Beurer Gmbh Heizgerät mit einem schmiegsamen elektrischen Wärmeteil

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GB0316506D0 (en) † 2003-07-15 2003-08-20 Thermocable Flexible Elements Heating blanket
WO2006076148A1 (fr) * 2004-12-30 2006-07-20 3M Innovative Properties Company Couverture de chauffage pour patient
US7469500B2 (en) * 2005-01-05 2008-12-30 Lovelace Reginald B Nematode extermination in place using heat blankets
DE102005042570A1 (de) 2005-09-08 2007-03-15 Beurer Gmbh & Co Schmiegsames Wärmegerät
US9089010B2 (en) * 2010-11-29 2015-07-21 Weiss Controls, Inc. Heater wire safety circuit
US9320084B2 (en) 2010-11-29 2016-04-19 Weiss Controls, Inc. Heater wire safety circuit
US9148911B2 (en) 2011-07-14 2015-09-29 Sunbeam Products, Inc. Safety circuit for heating device
ITMI20120621A1 (it) * 2012-04-17 2013-10-18 Tenacta Group Spa Dispositivo riscaldante con sistema di regolazione della temperatura migliorato
US9787083B2 (en) * 2012-12-06 2017-10-10 Twin-Star International, Inc. Overheat-resistant power cord and method
US9237604B2 (en) * 2014-01-06 2016-01-12 Long-Huang Chang Heating cable control system
DE102014103762B4 (de) * 2014-03-19 2017-10-19 Leifheit Ag Schlafphasenwecker

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Publication number Priority date Publication date Assignee Title
DE102008006017A1 (de) 2008-01-25 2009-08-06 Beurer Gmbh Schmiegsames Wärmegerät
DE102009008530A1 (de) 2009-02-11 2010-10-07 Beurer Gmbh Heizgerät mit einem schmiegsamen elektrischen Wärmeteil

Also Published As

Publication number Publication date
EP1491071A1 (fr) 2004-12-29
US20050109752A1 (en) 2005-05-26
WO2003077597A1 (fr) 2003-09-18
DE10211114A1 (de) 2003-10-02
DE50301808D1 (de) 2006-01-05
DE20303711U1 (de) 2003-06-12

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