EP2315493A1 - Heating device, in particular for a motor vehicle air conditioning device - Google Patents

Heating device, in particular for a motor vehicle air conditioning device Download PDF

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Publication number
EP2315493A1
EP2315493A1 EP09290807A EP09290807A EP2315493A1 EP 2315493 A1 EP2315493 A1 EP 2315493A1 EP 09290807 A EP09290807 A EP 09290807A EP 09290807 A EP09290807 A EP 09290807A EP 2315493 A1 EP2315493 A1 EP 2315493A1
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EP
European Patent Office
Prior art keywords
electrical resistance
current
delay circuit
heating device
electrical
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EP09290807A
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German (de)
French (fr)
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EP2315493B1 (en
Inventor
Thomas Blum
Michel Brun
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Mahle Behr France Rouffach SAS
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Behr France Rouffach SAS
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Application filed by Behr France Rouffach SAS filed Critical Behr France Rouffach SAS
Priority to EP09290807.8A priority Critical patent/EP2315493B1/en
Priority to CN2010105120622A priority patent/CN102118892A/en
Priority to US12/908,490 priority patent/US20110091190A1/en
Publication of EP2315493A1 publication Critical patent/EP2315493A1/en
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    • 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
    • H05B1/023—Industrial applications
    • H05B1/0236—Industrial applications for vehicles
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/02—Heaters using heating elements having a positive temperature coefficient

Definitions

  • the invention relates to a heating device, in particular for a motor vehicle air conditioning system according to the preamble of claim 1, and to a method for operating such a heating device according to the preamble of claim 12.
  • Automotive air conditioning systems are used for heating and cooling of air, which is supplied to a motor vehicle interior. To heat the air while electric. Heating devices or resistance heaters, especially in hybrid or electric vehicles used. Electric current is conducted through the electrical resistance heaters and, due to the electrical resistance of the electrical resistance heaters, they heat up, so that the air supplied to the motor vehicle interior can be heated by passing air past the electrical resistance heaters.
  • the electrical resistance heaters are energized with current in pulse width modulation (PWM).
  • PWM pulse width modulation
  • the electrical heating power of the electrical resistance heaters is controlled in such a way that the pulse width modulation is changed. That is, for an increase in the electric heating power, the turn-on time is lengthened and the turn-off time is shortened, and conversely, with a decrease in the electric heater power, the turn-on time is decreased and the turn-off time is increased.
  • the electric current for the resistance heaters comes from a vehicle electrical system as a power source of the motor vehicle.
  • the pulse width modulated current is delayed in time before being supplied to the individual electrical resistance heaters by means of a microcontroller.
  • the resistance heaters thus have switch-on times which are not simultaneous but are delayed in time and thus temporally successive.
  • the maximum current demand for the resistance heaters can be reduced because all the resistance heaters are not turned on or energized at the same time, i. H. the turn-on times of the electrical resistance heaters are not identical.
  • the microcontroller which generally has a processor and can thus execute a program or a software, is generally arranged in the motor vehicle air conditioning system, in particular in the area of the resistance heating devices.
  • microcontrollers are expensive to manufacture and therefore expensive and thus also prone to failure during operation.
  • the object of the present invention is to provide a heating device, in particular for motor vehicle air conditioners, and a method for operating such a heating device, in which a small maximum current peak demand occurs when and when electrical resistance heating devices are switched on or energized with a low technical outlay ,
  • the heater should be inexpensive to manufacture reliable in operation.
  • a heating device in particular for an air conditioner, comprising a housing, preferably a fan, preferably a refrigerant evaporator for cooling an air to be supplied to a vehicle interior, at least two electrical resistance heaters for heating the air to be supplied to the vehicle interior, wherein the at least two electrical resistance heaters a device for supplying at least one electrical resistance heater with a time delay with respect to another electrical resistance heater, wherein the device comprises at least one delay circuit, preferably two delay circuits, and / or the device of at least one delay circuit, preferably two Delay circuits, exists.
  • the at least one delay circuit is at least one, in particular exclusively, analog delay circuit and / or the at least one delay circuit has no processor and / or of the at least one delay circuit no program executable and / or the at least one delay circuit is an electrical and / or electronic circuit, in particular without processor.
  • the delay circuit is thus a very simple electrical and / or electronic circuit, which in particular has no processor.
  • the delay circuit can be made simple and inexpensive, so that the high cost of an expensive and expensive microcontroller can be saved.
  • the at least one delay circuit comprises at least one capacitor and / or at least one resistor. It is also possible if in addition an inductance is provided.
  • the at least one delay circuit comprises as electrical and / or electronic components exclusively at least one capacitor and / or at least one resistor. Due to the use of simple electronic components, such as a capacitor and a resistor, the delay circuit can be made simple and inexpensive.
  • the at least one electrical resistance heater is supplied by electric current in pulse width modulation.
  • the energizing of the at least two electrical resistance heating devices thus corresponds to the passage of current through the at least two electrical resistance heating devices during the switch-on of the pulse width modulated current.
  • At least one electrical resistance heater with a pulse-width-modulated current with respect to another electrical resistance heater can be supplied to the at least one delay circuit with a time delay.
  • the maximum current demand for the at least two electrical resistance heaters, in particular for all electrical resistance heaters, can thus be reduced at the beginning of the turn-on times.
  • the at least one electrical resistance heater is at least one PTC heater. It is particularly advantageous if the at least one resistance heater or a plurality of resistance heaters are combined to form a module and advantageously the electrical control unit can be connected or connected to this module. An electrical resistance heater is then, so to speak, a heating element of the module.
  • the at least two electrical resistance heating devices are electrically connected in parallel.
  • each of the electrical resistance heating devices connected in parallel is each connected to a parallel-current line and the parallel-current lines are connected to a central-current line.
  • a delay circuit is connected in series with the resistance heating devices connected in parallel in parallel-connected resistance heating devices.
  • At least two delay switching devices are connected in parallel and / or in series.
  • Method according to the invention for operating a heating device in particular for a motor vehicle air conditioning system, in particular comprising the steps of: passing electric current through at least two electrical resistance heating devices, preferably passing air through the heating device of the motor vehicle air conditioning system, generating heat energy by means of the at least two electrical resistance heating devices by applying the electrical energy is converted into heat energy, preferably transferring the thermal energy generated by the at least two electrical resistance heaters on the air to be heated, which is preferably passed through the motor vehicle air conditioning, so that the air heats, wherein when energizing the at least two electrical resistance heaters at least one electrical resistance heater delayed in time with respect to another electrical resistance heater Power is supplied to reduce the maximum current peak demand for the at least two electrical resistance heaters when energizing and / or switching on the at least two electrical resistance heaters, wherein the current is delayed analog and / or the current is delayed without a program or software is executed ,
  • the current in particular by means of at least one delay circuit, is delayed only analogously.
  • the current conducted by the at least two electrical resistance heating devices is pulse-width modulated and preferably the pulse width modulation is changed, in particular switching on and off times are changed in order to control and / or regulate the electrical power of the at least two electrical resistance heaters
  • the current is delayed by at least one delay circuit in each case for an electrical resistance heater.
  • the at least two electrical resistance heating devices are supplied with current in the high-voltage range, for example with a voltage of at least 60 V, 200 V or 300 V.
  • the motor vehicle air conditioning system expediently comprises at least one air guiding device, in particular an air flap, and / or at least one air duct and / or at least one heat exchanger through which the coolant of an internal combustion engine flows for heating the air to be supplied to the motor vehicle interior and / or a control unit.
  • cooling fins are arranged on the at least two electrical resistance heating devices in order to increase the surface for heating the air by means of the current conducted by the two electrical resistance heating devices.
  • PTC heaters Positive Temperature Coefficient
  • PTC heaters are conductive materials that have electrical resistance and are able to conduct electricity better at lower temperatures than at higher temperatures. Their electrical resistance thus increases with increasing temperature.
  • the PTC heater is generally made of ceramic, which is a PTC thermistor. This raises regardless of the boundary conditions - such. Applied voltage, nominal resistance, or air quantity at the PTC heater - a very uniform surface temperature at the PTC heater.
  • Fig. 1 is a switching arrangement with three formed as PTC heaters 2 concerned with heating the air guided by the automotive air conditioning system.
  • the PTC heaters 2 are connected in parallel and are powered by a power source 4, namely a vehicle electrical system 5 of the motor vehicle outside the motor vehicle air conditioning, with electric power.
  • the current source 4 provides current in pulse width modulation available.
  • the current in pulse width modulation is thereby passed from the power source 4 through central power lines 8 as power lines 6 to parallel flow lines 7.
  • the electric current in pulse width modulation is passed through the PTC heaters 2.
  • a delay circuit 3 is installed in each case.
  • the delay circuit 3 has no processor, i. H. Therefore, no program or software can be executed and is essentially equipped with simple electrical and / or electronic components, for example at least one capacitor and / or at least one resistor.
  • the delay circuit 3 is thus particularly simple and inexpensive to manufacture.
  • Fig. 3 is the temporal voltage curve of the guided by the three PTC heaters 2 current in pulse width modulation.
  • the time t is plotted on the abscissa, ie the horizontal axis.
  • the electric current is conducted in pulse modulation by the PTC heaters 2, that is, during a turn-on time T e current is passed through the PTC-Heinz wornen 2 and during a turn-off time T a no current is passed through the PTC heaters 2.
  • the Duration of the switch-on time T e and the switch-off time T a can be changed by the current source 4 and thereby the electrical heating power of the PTC heaters 2 is changed.
  • Fig. 2 the switching arrangement with the three PTC heaters 2 and the two delay circuits 3 is shown in a second embodiment.
  • the delay circuit 3 for the in Fig. 2 shown below PTC heater 2 not the central power line 8 is connected directly, but is connected to the parallel current line 7 between the delay circuit 3 and the central PTC heater 2.
  • the delay circuit 3 already receives delayed current, which has been delayed by the delay circuit 3 for the average PTC heater 2.
  • the delay times ⁇ t of the delay circuits 3 for the PTC center heater 2 and the lower PTC heater 2 are thus the same.

Abstract

The heaters i.e. positive temperature coefficient heaters (1, 2), have a device supplying electric current to one of the electric resistance heaters with a time delay relative to the other electric resistance heater, where the device comprises two delay circuits (3). One of the delay circuits comprises exclusively electric and/or electronic components such as capacitor and/or resistor. Each delay circuit is connected in series to a parallel connected in parallel to the electric resistance heaters. An independent claim is also included for a method for operating a heater.

Description

Die Erfindung betrifft eine Heizeinrichtung insbesondere für eine Kraftfahrzeugklimaanlage gemäß dem Oberbegriff des Anspruches 1 und ein Verfahren zum Betreiben einer solchen Heizeinrichtung gemäß dem Oberbegriff des Anspruches 12.The invention relates to a heating device, in particular for a motor vehicle air conditioning system according to the preamble of claim 1, and to a method for operating such a heating device according to the preamble of claim 12.

Kraftfahrzeugklimaanlagen werden zum Erwärmen und Kühlen von Luft eingesetzt, welche einem Kraftfahrzeuginnenraum zugeführt wird. Zum Erwärmen der Luft werden dabei elektrische. Heizeinrichtungen bzw. Widerstandsheizeinrichtungen, insbesondere bei Hybrid- oder Elektrofahrzeugen, eingesetzt. Durch die elektrischen Widerstandsheizeinrichtungen wird elektrischer Strom geleitet und aufgrund des elektrischen Widerstandes der elektrischen Widerstandsheizeinrichtungen erwärmen sich diese, so dass durch ein Vorbeileiten von Luft an den elektrischen Widerstandsheizeinrichtungen die dem Kraftfahrzeuginnenraum zugeführte Luft erwärmt werden kann.Automotive air conditioning systems are used for heating and cooling of air, which is supplied to a motor vehicle interior. To heat the air while electric. Heating devices or resistance heaters, especially in hybrid or electric vehicles used. Electric current is conducted through the electrical resistance heaters and, due to the electrical resistance of the electrical resistance heaters, they heat up, so that the air supplied to the motor vehicle interior can be heated by passing air past the electrical resistance heaters.

Zur Steuerung unterschiedlicher Heizleistungen der elektrischen Widerstandsheizeinrichtungen werden die elektrischen Widerstandsheizeinrichtungen mit Strom in Pulsweitenmodulation (PWM) bestromt. Bei einer Bestromung der elektrischen Widerstandsheizeinrichtungen mit pulsweitenmodulierten Strom wird die elektrische Heizleistung der elektrischen Widerstandsheizeinrichtungen dahingehend gesteuert, dass die Pulsweitenmodulation verändert wird. Dies bedeutet, für eine Erhöhung der elektrischen Heizleistung die Einschaltzeit verlängert und die Ausschaltzeit verkürzt wird und umgekehrt bei einer Verringerung der elektrischen Heizleistung, die Einschaltzeit verkleinert und die Ausschaltzeit vergrößert wird. Der elektrische Strom für die Widerstandsheizeinrichtungen stammt aus einem Bordnetz als Stromquelle des Kraftfahrzeuges. Um beim Einschalten bzw. Bestromen der Widerstandsheizeinrichtungen, d. h. zu Beginn der Einschaltzeit des pulsweiten modulierten Stromes, keinen sehr großen maximalen Stromspitzenbedarf für sämtliche Widerstandsheizeinrichtungen aufzuweisen, wird der pulsweitenmodulierte Strom vor der Zuführung zu den einzelnen elektrischen Widerstandsheizeinrichtungen mittels eines Mikrokontrollers zeitlich verzögert. Die Widerstandsheizeinrichtungen weisen damit Einschaltzeiten auf, die nicht gleichzeitig sind, sondern zeitlich verzögert und damit zeitlich aufeinanderfolgend sind. Dadurch kann der maximale Stromspitzenbedarf für die Widerstandsheizeinrichtungen verkleinert werden, weil sämtliche Widerstandsheizeinrichtungen nicht zum gleichen Zeitpunkt eingeschaltet oder bestromt werden, d. h. die Einschaltzeiten der elektrischen Widerstandsheizeinrichtungen nicht identisch sind.To control different heating powers of the electrical resistance heating devices, the electrical resistance heaters are energized with current in pulse width modulation (PWM). When current is applied to the electrical resistance heaters with pulse-width-modulated current, the electrical heating power of the electrical resistance heaters is controlled in such a way that the pulse width modulation is changed. That is, for an increase in the electric heating power, the turn-on time is lengthened and the turn-off time is shortened, and conversely, with a decrease in the electric heater power, the turn-on time is decreased and the turn-off time is increased. The electric current for the resistance heaters comes from a vehicle electrical system as a power source of the motor vehicle. When switching on or energizing the resistance heaters, d. H. at the beginning of the on-time of the pulse-width modulated current, to have no very large maximum current spike requirement for all resistance heaters, the pulse width modulated current is delayed in time before being supplied to the individual electrical resistance heaters by means of a microcontroller. The resistance heaters thus have switch-on times which are not simultaneous but are delayed in time and thus temporally successive. As a result, the maximum current demand for the resistance heaters can be reduced because all the resistance heaters are not turned on or energized at the same time, i. H. the turn-on times of the electrical resistance heaters are not identical.

Der Mikrokontroller, der im Allgemeinen einen Prozessor aufweist und somit ein Programm oder eine Software ausführen kann, ist dabei im Allgemeinen in der Kraftfahrzeugklimaanlage, insbesondere im Bereich der Widerstandsheizeinrichtungen, angeordnet. Derartige Mikrokontroller sind jedoch in der Herstellung aufwendig und damit teuer und damit außerdem im Betrieb störungsanfällig.The microcontroller, which generally has a processor and can thus execute a program or a software, is generally arranged in the motor vehicle air conditioning system, in particular in the area of the resistance heating devices. However, such microcontrollers are expensive to manufacture and therefore expensive and thus also prone to failure during operation.

Die Aufgabe der vorliegenden Erfindung besteht deshalb darin, eine Heizeinrichtung insbesondere für Kraftfahrzeugklimaanlagen und ein Verfahren zum Betreiben einer solchen Heizeinrichtung zur Verfügung zu stellen, bei der und bei dem beim Einschalten bzw. Bestromen von elektrischen Widerstandsheizeinrichtungen mit einem geringen technischen Aufwand ein kleiner maximaler Stromspitzenbedarf auftritt. Die Heizeinrichtung soll in der Herstellung preiswert sein zuverlässig im Betrieb arbeiten.Therefore, the object of the present invention is to provide a heating device, in particular for motor vehicle air conditioners, and a method for operating such a heating device, in which a small maximum current peak demand occurs when and when electrical resistance heating devices are switched on or energized with a low technical outlay , The heater should be inexpensive to manufacture reliable in operation.

Diese Aufgabe wird gelöst mit einer Heizeinrichtung, insbesondere für eine Klimaanlage, umfassend ein Gehäuse, vorzugsweise ein Gebläse, vorzugsweise einen Kältemittelverdampfer zum Kühlen einer einem Fahrzeuginnenraum zuzuführenden Luft, wenigstens zwei elektrische Widerstandsheizeinrichtungen zum Erwärmen der dem Fahrzeuginnenraum zuzuführenden Luft, wobei die wenigstens zwei elektrischen Widerstandsheizeinrichtungen mit elektrischen Strom versorgbar sind, eine Vorrichtung, um wenigstens eine elektrische Widerstandsheizeinrichtung mit einer zeitlichen Verzögerung bezüglich einer anderen elektrischen Widerstandsheizeinrichtung zu bestromen, wobei die Vorrichtung wenigstens eine Verzögerungsschaltung, vorzugsweise zwei Verzögerungsschaltungen, umfasst und/oder die Vorrichtung aus wenigstens einer Verzögerungsschaltung, vorzugsweise zwei Verzögerungsschaltungen, besteht.This object is achieved with a heating device, in particular for an air conditioner, comprising a housing, preferably a fan, preferably a refrigerant evaporator for cooling an air to be supplied to a vehicle interior, at least two electrical resistance heaters for heating the air to be supplied to the vehicle interior, wherein the at least two electrical resistance heaters a device for supplying at least one electrical resistance heater with a time delay with respect to another electrical resistance heater, wherein the device comprises at least one delay circuit, preferably two delay circuits, and / or the device of at least one delay circuit, preferably two Delay circuits, exists.

Insbesondere ist die wenigstens eine Verzögerungsschaltung wenigstens eine, insbesondere ausschließlich, analoge Verzögerungsschaltung und/oder die wenigstens eine Verzögerungsschaltung weist keinen Prozessor auf und/oder von der wenigstens einen Verzögerungsschaltung ist kein Programm ausführbar und/oder die wenigstens eine Verzögerungsschaltung ist eine elektrische und/oder elektronische Schaltung, insbesondere ohne Prozessor. In der wenigstens einen Verzögerungsschaltung sind somit keine digitalen Signale oder Informationen verarbeitbar. Die Verzögerungsschaltung ist somit eine sehr einfach aufgebaute elektrische und/oder elektronische Schaltung, die insbesondere über keinen Prozessor verfügt. Damit kann die Verzögerungsschaltung einfach und preiswert hergestellt werden, so dass die hohen Kosten für einen teueren und aufwendigen Mikrokontroller eingespart werden können.In particular, the at least one delay circuit is at least one, in particular exclusively, analog delay circuit and / or the at least one delay circuit has no processor and / or of the at least one delay circuit no program executable and / or the at least one delay circuit is an electrical and / or electronic circuit, in particular without processor. Thus, no digital signals or information can be processed in the at least one delay circuit. The delay circuit is thus a very simple electrical and / or electronic circuit, which in particular has no processor. Thus, the delay circuit can be made simple and inexpensive, so that the high cost of an expensive and expensive microcontroller can be saved.

In einer weiteren Ausgestaltung umfasst die wenigstens eine Verzögerungsschaltung wenigstens einen Kondensator und/oder wenigstens einen Widerstand. Auch ist es möglich, wenn zusätzlich eine Induktivität vorgesehen ist.In a further embodiment, the at least one delay circuit comprises at least one capacitor and / or at least one resistor. It is also possible if in addition an inductance is provided.

In einer ergänzenden Ausführungsform umfasst die wenigstens eine Verzögerungsschaltung als elektrische und/oder elektronische Bauteile ausschließlich wenigstens einen Kondensator und/oder wenigstens einen Widerstand. Aufgrund der Verwendung von einfachen elektronischen Bauteilen, beispielsweise einem Kondensator und einem Widerstand, kann die Verzögerungsschaltung einfach und preiswert hergestellt werden.In a supplementary embodiment, the at least one delay circuit comprises as electrical and / or electronic components exclusively at least one capacitor and / or at least one resistor. Due to the use of simple electronic components, such as a capacitor and a resistor, the delay circuit can be made simple and inexpensive.

Vorzugsweise ist die wenigstens eine elektrische Widerstandsheizeinrichtung von elektrischem Strom in Pulsweitenmodulation versorgbar. Das Bestromen der wenigstens zwei elektrischen Widerstandsheizeinrichtungen entspricht somit dem Durchleiten von Strom durch die wenigstens zwei elektrischen Widerstandsheizeinrichtungen während der Einschaltzeiten des pulsweitenmodulierten Stromes.Preferably, the at least one electrical resistance heater is supplied by electric current in pulse width modulation. The energizing of the at least two electrical resistance heating devices thus corresponds to the passage of current through the at least two electrical resistance heating devices during the switch-on of the pulse width modulated current.

In einer Variante ist mit der wenigstens eine Verzögerungsschaltung wenigstens eine elektrische Widerstandsheizeinrichtung mit pulsweitenmodulierten Strom bezüglich einer anderen elektrischen Widerstandsheizeinrichtung zeitlich verzögert versorgbar. Der maximale Stromspitzenbedarf für die wenigstens zwei elektrischen Widerstandsheizeinrichtungen, insbesondere für sämtliche elektrische Widerstandsheizeinrichtungen, kann damit zu Beginn der Einschaltzeiten verringert werden.In one variant, at least one electrical resistance heater with a pulse-width-modulated current with respect to another electrical resistance heater can be supplied to the at least one delay circuit with a time delay. The maximum current demand for the at least two electrical resistance heaters, in particular for all electrical resistance heaters, can thus be reduced at the beginning of the turn-on times.

Zweckmäßig ist die wenigstens eine elektrische Widerstandsheizeinrichtung wenigstens eine PTC-Heizeinrichtung. Dabei ist es besonders vorteilhaft, wenn die zumindest eine Widerstandsheizeinrichtung oder eine Mehrzahl von Widerstandsheizeinrichtungen zu einem Modul zusammengefasst sind und vorteilhaft die elektrische Steuereinheit mit diesem Modul verbindbar oder verbunden ist. Eine elektrische Widerstandsheizeinrichtung ist dann so zu sagen ein Heizstrang des Moduls.Suitably, the at least one electrical resistance heater is at least one PTC heater. It is particularly advantageous if the at least one resistance heater or a plurality of resistance heaters are combined to form a module and advantageously the electrical control unit can be connected or connected to this module. An electrical resistance heater is then, so to speak, a heating element of the module.

In einer weiteren Ausführungsform sind die wenigstens zwei elektrischen Widerstandsheizrichtungen elektrisch parallel geschaltet.In a further embodiment, the at least two electrical resistance heating devices are electrically connected in parallel.

In einer weiteren Ausführungsform sind jede der parallel geschalteten elektrischen Widerstandsheizeinrichtungen je an eine Parallelstromleitung angeschlossen und die Parallelstromleitungen sind an eine Zentralstromleitung angeschlossen.In a further embodiment, each of the electrical resistance heating devices connected in parallel is each connected to a parallel-current line and the parallel-current lines are connected to a central-current line.

In einer weiteren Ausgestaltung ist in parallel geschalteten Widerstandsheizeinrichtungen je eine Verzögerungsschaltung in Reihe zu den parallel geschalteten Widerstandsheizeinrichtungen geschaltet.In a further refinement, a delay circuit is connected in series with the resistance heating devices connected in parallel in parallel-connected resistance heating devices.

In einer ergänzenden Variante sind wenigstens zwei Verzögerungsschalteinrichtungen parallel und/oder in Reihe geschaltet.In a supplementary variant, at least two delay switching devices are connected in parallel and / or in series.

Erfindungsgemäßes Verfahren zum Betreiben einer Heizeinrichtung insbesondere für eine Kraftfahrzeugklimaanlage, insbesondere mit den Schritten: Leiten von elektrischen Strom durch wenigstens zwei elektrische Widerstandsheizeinrichtungen, vorzugsweise Leiten von Luft durch die Heizeinrichtung der Kraftfahrzeugklimaanlage, Erzeugen von Wärmeenergie mittels der wenigstens zwei elektrischen Widerstandsheizeinrichtungen, indem die elektrische Energie in Wärmeenergie umgewandelt wird, vorzugsweise Übertragen der von den wenigstens zwei elektrischen Widerstandsheizeinrichtungen erzeugte Wärmeenergie auf die zu erwärmende Luft, welche vorzugsweise durch die Kraftfahrzeugklimaanlage geleitet wird, so dass sich die Luft erwärmt, wobei beim Bestromen der wenigstens zwei elektrischen Widerstandsheizeinrichtungen wenigstens eine elektrische Widerstandsheizeinrichtung zeitlich verzögert bezüglich einer anderen elektrischen Widerstandsheizeinrichtung mit Strom versorgt wird, um beim Bestromen und/oder Einschalten der wenigstens zwei elektrischen Widerstandsheizeinrichtungen den maximalen Stromspitzenbedarf für die wenigstens zwei elektrischen Widerstandsheizeinrichtungen zu verkleinern, wobei der Strom analog verzögert wird und/oder der Strom verzögert wird ohne dass ein Programm oder eine Software ausgeführt wird.Method according to the invention for operating a heating device, in particular for a motor vehicle air conditioning system, in particular comprising the steps of: passing electric current through at least two electrical resistance heating devices, preferably passing air through the heating device of the motor vehicle air conditioning system, generating heat energy by means of the at least two electrical resistance heating devices by applying the electrical energy is converted into heat energy, preferably transferring the thermal energy generated by the at least two electrical resistance heaters on the air to be heated, which is preferably passed through the motor vehicle air conditioning, so that the air heats, wherein when energizing the at least two electrical resistance heaters at least one electrical resistance heater delayed in time with respect to another electrical resistance heater Power is supplied to reduce the maximum current peak demand for the at least two electrical resistance heaters when energizing and / or switching on the at least two electrical resistance heaters, wherein the current is delayed analog and / or the current is delayed without a program or software is executed ,

In einer weiteren Ausgestaltung wird der Strom, insbesondere mittels wenigstens einer Verzögerungsschaltung, ausschließlich analog verzögert.In a further refinement, the current, in particular by means of at least one delay circuit, is delayed only analogously.

Insbesondere ist der durch die wenigstens zwei elektrischen Widerstandsheizeinrichtungen geleitete Strom pulsweitenmoduliert und vorzugsweise wird die Pulsweitenmodulation verändert, insbesondere werden Ein- und Ausschaltzeiten verändert, um die elektrische Leistung der wenigstens zwei elektrischen Widerstandsheizeinrichtungen zu steuern und/oder zu regelnIn particular, the current conducted by the at least two electrical resistance heating devices is pulse-width modulated and preferably the pulse width modulation is changed, in particular switching on and off times are changed in order to control and / or regulate the electrical power of the at least two electrical resistance heaters

In einer weiteren Ausgestaltung wird der Strom von wenigstens einer Verzögerungsschaltung jeweils für eine elektrische Widerstandsheizeinrichtung verzögert.In a further embodiment, the current is delayed by at least one delay circuit in each case for an electrical resistance heater.

In einer weiteren Ausgestaltung sind die wenigstens zwei elektrischen Widerstandsheizeinrichtungen mit Strom im Hochvoltbereich, beispielsweise mit einer Spannung von wenigstens 60 V, 200 V oder 300 V, versorgt. Zweckmäßig umfasst die Kraftfährzeugklimaanlage wenigstens eine Luftleiteinrichtung, insbesondere eine Luftklappe, und/oder wenigstens einen Luftkanal und/oder wenigstens einen von Kühlmittel eines Verbrennungsmotors durchströmten Wärmeübertrager zum Erwärmen der dem Kraftfahrzeuginnenraum zuzuführenden Luft und/oder eine Steuerungseinheit.In a further embodiment, the at least two electrical resistance heating devices are supplied with current in the high-voltage range, for example with a voltage of at least 60 V, 200 V or 300 V. The motor vehicle air conditioning system expediently comprises at least one air guiding device, in particular an air flap, and / or at least one air duct and / or at least one heat exchanger through which the coolant of an internal combustion engine flows for heating the air to be supplied to the motor vehicle interior and / or a control unit.

In einer ergänzenden Variante sind an den wenigstens zwei elektrischen Widerstandsheizeinrichtungen Kühlrippen angeordnet, um die Oberfläche zum Erwärmen der Luft mittels des durch die zwei elektrischen Widerstandsheizeinrichtungen geleiteten Stromes zu erhöhen.In a supplementary variant, cooling fins are arranged on the at least two electrical resistance heating devices in order to increase the surface for heating the air by means of the current conducted by the two electrical resistance heating devices.

PTC-Heizeinrichtungen (PTC: Positive Temperature Coefficient) sind Strom leitende Materialien, die einen elektrischen Widerstand aufweisen und bei tieferen Temperaturen den Strom besser leiten können als bei höheren Temperaturen. Ihr elektrischer Widerstand vergrößert sich somit bei steigender Temperatur. Die PTC-Heizeinrichtung besteht im Allgemeinen aus Keramik, die ein Kaltleiter ist. Dadurch stellt sich unabhängig von den Randbedingungen - wie z. B. angelegte Spannung, Nominalwiderstand oder Luftmenge an der PTC-Heizeinrichtung - eine sehr gleichmäßige Oberflächentemperatur an der PTC-Heizeinrichtung ein.PTC heaters (PTC: Positive Temperature Coefficient) are conductive materials that have electrical resistance and are able to conduct electricity better at lower temperatures than at higher temperatures. Their electrical resistance thus increases with increasing temperature. The PTC heater is generally made of ceramic, which is a PTC thermistor. This raises regardless of the boundary conditions - such. Applied voltage, nominal resistance, or air quantity at the PTC heater - a very uniform surface temperature at the PTC heater.

Im Nachfolgenden wird ein Ausführungsbeispiel der Erfindung unter Bezugnahme auf die beigefügten Zeichnungen näher beschrieben. Es zeigt:

Fig. 1
eine Schaltanordnung mit drei Widerstandsheizeinrichtungen und zwei Verzögerungsschaltungen in einem ersten Ausführungsbeispiel,
Fig. 2
die Schaltanordnung mit drei Widerstandsheizeinrichtungen und zwei Verzögerungsschaltungen in einem zweiten Ausführungsbeispiel und
Fig. 3
den zeitlichen Spannungsverlauf eines pulsweitenmodulierten Stromes für die drei Widerstandsheizeinrichtungen.
In the following, an embodiment of the invention will be described in more detail with reference to the accompanying drawings. It shows:
Fig. 1
a switching arrangement with three resistance heaters and two delay circuits in a first embodiment,
Fig. 2
the switching arrangement with three Widerstandsheizeinrichtungen and two delay circuits in a second embodiment and
Fig. 3
the temporal voltage curve of a pulse width modulated current for the three Widerstandsheizeinrichtungen.

In Fig. 1 ist eine Schaltanordnung mit drei als PTC-Heizeinrichtungen 2 ausgebildeten Widerstandsheizrichtungen 1 dargestellt insbesondere für eine nicht dargestellte Kraftfahrzeugklimaanlage zum Erwärmen der durch die Kraftfahrzeugklimaanlage geleiteten Luft.In Fig. 1 is a switching arrangement with three formed as PTC heaters 2 Widerstandsheizrichtungen 1 shown in particular for an unillustrated motor vehicle air conditioning system for heating the air guided by the automotive air conditioning system.

Die PTC-Heizeinrichtungen 2 sind dabei parallel geschaltet und werden von einer Stromquelle 4, nämlich einem Bordnetz 5 des Kraftfahrzeuges außerhalb der Kraftfahrzeugklimaanlage, mit elektrischem Strom versorgt. Die Stromquelle 4 stellt dabei Strom in Pulsweitenmodulation zur Verfügung. Der Strom in Pulsweitenmodulation wird dabei von der Stromquelle 4 durch Zentralstromleitungen 8 als Stromleitungen 6 zu Parallelstromleitungen 7 geleitet. Mittels der Parallelstromleitungen 7 wird der elektrische Strom in Pulsweitenmodulation durch die PTC-Heizeinrichtungen 2 geleitet. In zwei der drei Parallelstromleitungen 7 ist jeweils eine Verzögerungsschaltung 3 eingebaut. Die Verzögerungsschaltung 3 weist keinen Prozessor auf, d. h. kann somit auch kein Programm oder eine Software ausführen und ist im Wesentlichen mit einfachen elektrischen und/oder elektronischen Bauteilen, beispielsweise wenigstens einem Kondensator und/oder wenigstens einem Widerstand, ausgestattet. Die Verzögerungsschaltung 3 ist damit in der Herstellung besonders einfach und preiswert.The PTC heaters 2 are connected in parallel and are powered by a power source 4, namely a vehicle electrical system 5 of the motor vehicle outside the motor vehicle air conditioning, with electric power. The current source 4 provides current in pulse width modulation available. The current in pulse width modulation is thereby passed from the power source 4 through central power lines 8 as power lines 6 to parallel flow lines 7. By means of the parallel current lines 7, the electric current in pulse width modulation is passed through the PTC heaters 2. In two of the three parallel current lines 7, a delay circuit 3 is installed in each case. The delay circuit 3 has no processor, i. H. Therefore, no program or software can be executed and is essentially equipped with simple electrical and / or electronic components, for example at least one capacitor and / or at least one resistor. The delay circuit 3 is thus particularly simple and inexpensive to manufacture.

In Fig. 3 ist der zeitliche Spannungsverlauf des durch die drei PTC-Heizeinrichtungen 2 geleiteten Stromes in Pulsweitenmodulation dargestellt. An der Abszisse, d. h. der horizontalen Achse, ist dabei die Zeit t aufgetragen. Der elektrische Strom wird in Pulsmodulation durch die PTC-Heizeinrichtungen 2 geleitet, d. h. während einer Einschaltzeit Te wird Strom durch die PTC-Heinzeinrichtungen 2 geleitet und während einer Ausschaltzeit Ta wird kein Strom durch die PTC-Heizeinrichtungen 2 geleitet. Die Dauer der Einschaltzeit Te und der Ausschaltzeit Ta kann dabei von der Stromquelle 4 verändert werden und dadurch die elektrische Heizleistung der PTC-Heizeinrichtungen 2 verändert wird. Je länger die Einschaltzeiten Ta sind und je kürzer die Ausschaltzeiten Ta sind, desto größer ist die von den PTC-Heizeinrichtungen 2 zur Verfügung gestellte elektrische Heizleistung und umgekehrt. Damit beim Bestromen bzw. Einschalten der PTC-Heizeinrichtungen 2, d. h. zu Beginn des Einschaltzeitpunktes Te, nicht bei sämtlichen PTC-Heizeinrichtungen 2 gleichzeitig der Beginn der Bestromung bzw. der Beginn der Einschaltzeiten Te auftritt, wird von den Verzögerungsschaltungen 3 der von der Stromquelle 4 zur Verfügung gestellte Strom in Pulsweitenmodulation zeitlich verzögert. In Fig. 3 ist in der untersten Kurve der zeitliche Spannungsverlauf des pulsweiten modulierten Stromes für die in Fig. 1 oben dargestellte PTC-Heizeinrichtung 2 abgebildet. Die in Fig. 3 dargestellte mittlere Kurve zeigt den zeitlichen Spannungsverlauf des pulsweiten modulierten Stromes für die in Fig. 1 mittlere PTC-Heizeinrichtung und die in Fig. 3 dargestellte oberste Kurve zeigt den zeitlichen Spannungsverlauf des pulsweiten modulierten Stromes der in Fig. 1 unten dargestellten PTC-Heizeinrichtungen 2. Der Beginn der Einschaltzeit Te wird dabei jeweils um eine Verzögerungszeit Δt verzögert. Die Verzögerungsschaltung 3, für die in Fig. 1 dargestellte mittlere PTC-Heizeinrichtung, verzögert somit den von der Stromquelle 4 zur Verfügung gestellten Strom um die Verzögerungszeit Δt und die in Fig. 1 für die unterste PTC-Heizeinrichtung 2 zuständige Verzögerungsschaltung 3, verzögert somit den Strom aus der Stromquelle 4 um zwei Verzögerungszeiten Δt. In den PTC-Heizeinrichtungen 2 und den Parallelstromleitungen 7 tritt damit ein Phasenversatz des pulsweitenmodulierten Stromes auf. Damit kann der maximale Stromspitzenbedarf für die drei PTC-Heizeinrichtungen 2 zu Beginn der Einschaltzeiten Te verringert werden.In Fig. 3 is the temporal voltage curve of the guided by the three PTC heaters 2 current in pulse width modulation. The time t is plotted on the abscissa, ie the horizontal axis. The electric current is conducted in pulse modulation by the PTC heaters 2, that is, during a turn-on time T e current is passed through the PTC-Heinzeinrichtungen 2 and during a turn-off time T a no current is passed through the PTC heaters 2. The Duration of the switch-on time T e and the switch-off time T a can be changed by the current source 4 and thereby the electrical heating power of the PTC heaters 2 is changed. The longer the turn-on times T a and the shorter the turn-off times T a , the greater the electric heating power provided by the PTC heaters 2 and vice versa. Thus, when energizing or switching on the PTC heaters 2, ie at the beginning of the switch-on time T e , not at all PTC heaters 2 at the same time the beginning of the energization or the beginning of the turn-on times T e occurs, is of the delay circuits 3 of the Current source 4 provided current in pulse width modulation delayed in time. In Fig. 3 is in the lowest curve the temporal voltage curve of the pulse width modulated current for the in Fig. 1 Pictured above PTC heater 2. In the Fig. 3 shown mean curve shows the temporal voltage curve of the pulse width modulated current for in Fig. 1 medium PTC heater and the in Fig. 3 The uppermost curve shows the temporal voltage curve of the pulse-width modulated current of Fig. 1 PTC heaters 2 shown below. The start of the switch-on time T e is delayed by a delay time Δt. The delay circuit 3, for in Fig. 1 shown average PTC heater, thus delays the current provided by the current source 4 by the delay time .DELTA.t and in Fig. 1 for the lowest PTC heater 2 competent delay circuit 3, thus delays the current from the current source 4 by two delay times .DELTA.t. In the PTC heaters 2 and the parallel current lines 7 thus occurs a phase offset of the pulse width modulated current. Thus, the maximum current demand for the three PTC heaters 2 can be reduced at the beginning of the turn-on times T e .

In Fig. 2 ist die Schaltanordnung mit den drei PTC-Heizeinrichtungen 2 und den zwei Verzögerungsschaltungen 3 in einem zweiten Ausführungsbeispiel dargestellt. Im Nachfolgenden werden im Wesentlichen nur die Unterschiede zu dem ersten Ausführungsbeispiel gemäß Fig. 1 beschrieben. Die Verzögerungsschaltung 3 für die in Fig. 2 unten dargestellte PTC-Heizeinrichtung 2, ist nicht unmittelbar die Zentralstromleitung 8 angeschlossen, sondern wird an die Parallelstromleitung 7 zwischen der Verzögerungsschaltung 3 und der mittleren PTC-Heizeinrichtung 2 angeschlossen. Damit erhält die Verzögerungsschaltung 3 bereits verzögerten Strom, der von der Verzögerungsschaltung 3 für die mittlere PTC-Heizeinrichtung 2 verzögert worden ist. Die Verzögerungszeiten Δt der Verzögerungsschaltungen 3 für die mittlere PTC-Heizeinrichtung 2 als auch für die untere PTC-Heizeinrichtung 2 sind somit gleich. Aufgrund der Versorgung der Verzögerungsschaltung 3 für die untere PTC-Heizeinrichtung 2 mit bereits verzögerten Strom aus der Verzögerungsschaltung 3 der mittleren PTC-Heizeinrichtung 2, tritt auch im zweiten Ausführungsbeispiel wieder der in Fig. 3 dargestellte zeitliche Spannungsverlauf des pulsweiten modulierten Stromes in den drei Widerstandsheizeinrichtungen 1 auf, obwohl beide Verzögerungsschaltungen 3 die gleichen Verzögerungszeiten Δt aufweisen.In Fig. 2 the switching arrangement with the three PTC heaters 2 and the two delay circuits 3 is shown in a second embodiment. In the following, essentially only the differences from the first embodiment will be according to FIG Fig. 1 described. The delay circuit 3 for the in Fig. 2 shown below PTC heater 2, not the central power line 8 is connected directly, but is connected to the parallel current line 7 between the delay circuit 3 and the central PTC heater 2. Thus, the delay circuit 3 already receives delayed current, which has been delayed by the delay circuit 3 for the average PTC heater 2. The delay times Δt of the delay circuits 3 for the PTC center heater 2 and the lower PTC heater 2 are thus the same. Due to the supply of the delay circuit 3 for the lower PTC heater 2 with already delayed current from the delay circuit 3 of the central PTC heater 2, occurs in the second embodiment again in Fig. 3 shown temporal voltage waveform of the pulse width modulated current in the three resistance heaters 1, although both delay circuits 3 have the same delay times .DELTA.t.

Insgesamt betrachtet sind mit der erfindungsgemäßen Kraftfahrzeugklimaanlage und dem erfindungsgemäßen Verfahren zum Betreiben einer Kraftfahrzeugklimaanlage wesentliche Vorteile verbunden. Anstelle der Verwendung eines aufwendigen und teuren Mikrokontrollers als Vorrichtung, um die elektrischen Widerstandsheizeinrichtungen 1 verzögert mit elektrischem Strom zu bestromen wie im Stand der Technik, wird eine einfache und preiswerte Verzögerungsschaltung 3 in analogem Aufbau verwendet, so dass dadurch erhebliche Herstellungskosten eingespart werden können.Overall, significant advantages are associated with the motor vehicle air conditioning system according to the invention and the method according to the invention for operating an automotive air conditioning system. Instead of using a complicated and expensive microcontroller as a device to energize the electric resistance heating devices 1 delayed with electric current as in the prior art, a simple and inexpensive delay circuit 3 is used in an analogous structure, thereby considerable cost savings can be saved.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Widerstandsheizeinrichtungresistance heater
22
PTC-HeizeinrichtungPTC heater
33
Verzögerungsschaltungdelay circuit
44
Stromquellepower source
55
Bordnetzboard network
66
Stromleitungpower line
77
ParallelstromleitungParallel power line
88th
ZentralstromleitungCentral Power Line
Te T e
Einschaltzeiton time
Ta T a
Ausschaltzeitoff time
Δt.delta.t
VerzögerungszeitDelay Time

Claims (15)

Heizeinrichtung umfassend - wenigstens zwei elektrische Widerstandsheizeinrichtungen (1) zum Erwärmen der dem Fahrzeuginnenraum zuzuführenden Luft, wobei die wenigstens zwei elektrischen Widerstandsheizeinrichtungen (1) mit elektrischen Strom versorgbar sind, - eine Vorrichtung (3), um wenigstens eine elektrische Widerstandsheizeinrichtung (1) mit einer zeitlichen Verzögerung bezüglich einer anderen elektrischen Widerstandsheizeinrichtung (1) zu bestromen, dadurch gekennzeichnet, dass
die Vorrichtung (3) aus wenigstens einer Verzögerungsschaltung (3), vorzugsweise zwei Verzögerungsschaltungen (3), besteht.Heating device comprising at least two electrical resistance heating devices (1) for heating the air to be supplied to the vehicle interior, wherein the at least two electrical resistance heating devices (1) can be supplied with electric current, a device (3) for energizing at least one electrical resistance heater (1) with a time delay with respect to another electrical resistance heater (1), characterized in that
the device (3) consists of at least one delay circuit (3), preferably two delay circuits (3). Heizeinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die wenigstens eine Verzögerungsschaltung (3) wenigstens eine, insbesondere ausschließlich, analoge Verzögerungsschaltung (3) ist und/oder die wenigstens eine Verzögerungsschaltung (3) keinen Prozessor aufweist und/oder von der wenigstens einen Verzögerungsschaltung (3) kein Programm ausführbar ist und/oder die wenigstens eine Verzögerungsschaltung (3) eine elektrische und/oder elektronische Schaltung, insbesondere ohne Prozessor, ist.Heating device according to claim 1, characterized in that the at least one delay circuit (3) is at least one, in particular exclusively, analog delay circuit (3) and / or the at least one delay circuit (3) has no processor and / or from the at least one delay circuit ( 3) no program can be executed and / or the at least one delay circuit (3) is an electrical and / or electronic circuit, in particular without a processor. Heizeinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die wenigstens einen Verzögerungsschaltung (3) wenigstens einen Kondensator und/oder wenigstens einen Widerstand umfasst.Heating device according to claim 1 or 2, characterized in that the at least one delay circuit (3) comprises at least one capacitor and / or at least one resistor. Heizeinrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die wenigstens eine Verzögerungsschaltung (3) als elektrische und/oder elektronische Bauteile ausschließlich wenigstens einen Kondensator und/oder wenigstens einen Widerstand umfasst.Heating device according to claim 3, characterized in that the at least one delay circuit (3) comprises as electrical and / or electronic components exclusively at least one capacitor and / or at least one resistor. Heizeinrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die wenigstens eine elektrische Widerstandsheizeinrichtung (1) von elektrischem Strom in Pulsweitenmodulation versorgbar ist.Heating device according to one or more of the preceding claims, characterized in that the at least one electrical resistance heater (1) can be supplied by electric current in pulse width modulation. Heizeinrichtung nach Anspruch 5, dadurch gekennzeichnet, dass mit der wenigstens einen Verzögerungsschaltung (3) wenigstens eine elektrische Widerstandsheizeinrichtung (1) zeitlich verzögert mit pulsweitenmoduliertem Strom versorgbar ist bezüglich einer anderen elektrischen Widerstandsheizeinrichtung (1).Heating device according to claim 5, characterized in that with the at least one delay circuit (3) at least one electrical resistance heater (1) is supplied delayed in time with pulse width modulated current with respect to another electrical resistance heater (1). Heizeinrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die wenigstens eine elektrische Widerstandsheizeinrichtung (1) wenigstens eine PTC-Heizeinrichtung (2) ist.Heating device according to one or more of the preceding claims, characterized in that the at least one electrical resistance heating device (1) is at least one PTC heating device (2). Heizeinrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die wenigstens zwei elektrischen Widerstandsheizrichtungen (1) elektrisch parallel geschaltet sind.Heating device according to one or more of the preceding claims, characterized in that the at least two electrical Widerstandsheizrichtungen (1) are electrically connected in parallel. Heizeinrichtung nach Anspruch 8, dadurch gekennzeichnet, dass jede der parallel geschalteten elektrischen Widerstandsheizeinrichtungen (1) je an eine Parallelstromleitung (7) angeschlossen sind und die Parallelstromleitungen (7) an eine Zentralstromleitung (8) angeschlossen sind.Heating device according to claim 8, characterized in that each of the electrical resistance heating devices (1) connected in parallel are each connected to a parallel current line (7) and the parallel current lines (7) are connected to a central current line (8). Heizeinrichtung nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass in parallel geschalteten Widerstandsheizeinrichtungen (1) je eine Verzögerungsschaltung (3) in Reihe zu den parallel geschalteten Widerstandsheizeinrichtungen (1) geschaltet ist.Heating device according to claim 8 or 9, characterized in that in parallel resistance heating devices (1) each have a delay circuit (3) in series with the parallel-connected resistance heating devices (1) is connected. Heizeinrichtung nach Anspruch 10, dadurch gekennzeichnet, dass wenigstens zwei Verzögerungsschalteinrichtungen (3) parallel und/oder in Reihe geschaltet sind.Heating device according to claim 10, characterized in that at least two delay switching devices (3) are connected in parallel and / or in series. Verfahren zum Betreiben einer Heizeinrichtung, insbesondere für eine Kraftfahrzeugklimaanlage gemäß einem oder mehrerer der Ansprüche 1 bis 11, mit den Schritten: - Leiten von elektrischen Strom durch wenigstens zwei elektrische Widerstandsheizeinrichtungen (1), - vorzugsweise Leiten von Luft durch die Heizeinrichtung, - Erzeugen von Wärmeenergie mittels der wenigstens zwei elektrischen Widerstandsheizeinrichtungen (1), indem die elektrische Energie in Wärmeenergie umgewandelt wird, - vorzugsweise Übertragen der von den wenigstens zwei elektrischen Widerstandsheizeinrichtungen (1) erzeugte Wärmeenergie auf die zu erwärmende Luft, so dass sich die Luft erwärmt, wobei - beim Bestromen der wenigstens zwei elektrischen Widerstandsheizeinrichtungen (1) wenigstens eine elektrische Widerstandsheizeinrichtung (1) zeitlich verzögert bezüglich einer anderen elektrischen Widerstandsheizeinrichtung (1) mit Strom versorgt wird, um beim Bestromen und/oder Einschalten der wenigstens zwei elektrischen Widerstandsheizeinrichtungen (1) den maximalen Stromspitzenbedarf für die wenigstens zwei elektrischen Widerstandsheizeinrichtungen (1) zu verkleinern, dadurch gekennzeichnet, dass der Strom analog verzögert wird und/oder der Strom verzögert wird ohne dass ein Programm oder eine Software ausgeführt wird.Method for operating a heating device, in particular for an automotive air conditioning system according to one or more of claims 1 to 11, comprising the steps: Passing electrical current through at least two electrical resistance heating devices (1), preferably passing air through the heater, Generating heat energy by means of the at least two electrical resistance heating devices (1) by converting the electrical energy into heat energy, - Preferably, the thermal energy generated by the at least two electrical resistance heating devices (1) on the air to be heated, so that the air heats, wherein - When energizing the at least two electrical resistance heaters (1) at least one electrical resistance heater (1) delayed in time with respect to another electric resistance heating device (1) is supplied with power in order to reduce the maximum current peak demand for the at least two electrical resistance heating devices (1) during energization and / or switching on of the at least two electrical resistance heating devices (1), characterized in that the current is delayed analogously and / or the current is delayed without a program or software is executed. Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass der Strom, insbesondere mittels wenigstens einer Verzögerungsschaltung (3), ausschließlich analog verzögert wird.A method according to claim 12, characterized in that the current, in particular by means of at least one delay circuit (3), is delayed only analog. Verfahren nach Anspruch 12 oder 13, dadurch gekennzeichnet, dass der durch die wenigstens zwei elektrischen Widerstandsheizeinrichtungen (1) geleitete Strom pulsweitenmoduliert ist und vorzugsweise die Pulsweitenmodulation verändert wird, insbesondere Ein- und Ausschaltzeiten verändert werden, um die elektrische Leistung der wenigstens zwei elektrischen Widerstandsheizeinrichtungen (1) zu steuern und/oder zu regeln.Method according to claim 12 or 13, characterized in that the current conducted by the at least two electrical resistance heating devices (1) is pulse width modulated and preferably the pulse width modulation is changed, in particular switching on and off times are changed in order to control the electric power of the at least two electrical resistance heaters ( 1) to control and / or to regulate. Verfahren nach einem oder mehreren der Ansprüche 12 bis 14, dadurch gekennzeichnet, dass der Strom von wenigstens einer Verzögerungsschaltung (3) jeweils für eine elektrische Widerstandsheizeinrichtung (1) verzögert wird.Method according to one or more of Claims 12 to 14, characterized in that the current of at least one delay circuit (3) is delayed in each case for an electrical resistance heater (1).
EP09290807.8A 2009-10-21 2009-10-21 Heating device, in particular for a motor vehicle air conditioning device Revoked EP2315493B1 (en)

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CN2010105120622A CN102118892A (en) 2009-10-21 2010-10-19 Heating device, in particular for a motor vehicle air conditioning device
US12/908,490 US20110091190A1 (en) 2009-10-21 2010-10-20 Heater particularly for a motor vehicle hvac system

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EP2315493B1 (en) 2009-10-21 2017-05-10 Mahle Behr France Rouffach S.A.S Heating device, in particular for a motor vehicle air conditioning device
DE102011057105A1 (en) * 2011-12-28 2013-07-04 Webasto Ag Electric heating device mounted in e.g. motor vehicle, has control unit that interrupts electric power supply to electric heating element during interruption period, when performing heating operation of electric heating element
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CN105828461B (en) * 2016-05-16 2022-04-26 苏州经贸职业技术学院 Shutdown delay cooling control circuit and cooling protection method for electric heating equipment
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US20110091190A1 (en) 2011-04-21
CN102118892A (en) 2011-07-06

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