EP3011802B1 - Heating device - Google Patents

Heating device Download PDF

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Publication number
EP3011802B1
EP3011802B1 EP14730934.8A EP14730934A EP3011802B1 EP 3011802 B1 EP3011802 B1 EP 3011802B1 EP 14730934 A EP14730934 A EP 14730934A EP 3011802 B1 EP3011802 B1 EP 3011802B1
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EP
European Patent Office
Prior art keywords
fluid
housing
magnetic field
surface heating
heating element
Prior art date
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EP14730934.8A
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German (de)
French (fr)
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EP3011802A1 (en
Inventor
Lars Heeper
Karsten Marquas
Dirk Nagel
Matthias Stallein
Michael Steinkamp
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Behr Hella Thermocontrol GmbH
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Behr Hella Thermocontrol GmbH
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Publication of EP3011802A1 publication Critical patent/EP3011802A1/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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • H05B6/108—Induction heating apparatus, other than furnaces, for specific applications using a susceptor for heating a fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/101—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply
    • F24H1/106—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply with electrodes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H2250/00—Electrical heat generating means
    • F24H2250/08—Induction

Definitions

  • the invention relates to a heating device with a housing having a fluid channel disposed therein with a fluid inlet and a fluid outlet, wherein in the housing an alternating magnetic field generating element is provided, which is separated by at least one wall sealed from the fluid channel, wherein further at least one metallic Surface heating element is provided, which can be heated by the magnetic alternating field, wherein the at least one surface heating element is arranged in the fluid channel.
  • Heating devices are known in the art. Thus, there are air-side heating devices that have so-called PTC heating elements, which are electrically energized and thereby heat. Via air-side fins, which are in contact with the PTC elements, the heat is transferred to the air flowing through.
  • PTC heating elements which are electrically energized and thereby heat.
  • Via air-side fins which are in contact with the PTC elements, the heat is transferred to the air flowing through.
  • these heaters have a fundamentally different structure than necessary for liquid media.
  • Heating devices for liquid media are provided with a closed housing, which are formed with a fluid channel, with a fluid inlet and a Fluid outlet, wherein in the housing a heating element protrudes, which is heated with a PTC element.
  • This heating device for liquid media has the disadvantage that the heat is generated in a different area than in the fluid channel through which the liquid medium to be heated flows. As a result, a delayed heating is achieved due to the existing contact resistances, which is to be considered disadvantageous.
  • the documents GB 787 125 A and WO 2009/050631 A1 disclose heaters of the prior art.
  • the object of the present invention to provide a heating device which is suitable for inductively heating a fluid, wherein the heating device is characterized in particular by a cost-effective and less complex design.
  • the object of the present invention is achieved by a heating device with the features of claim 1.
  • An embodiment of the invention relates to a heating device having a housing with a fluid channel disposed therein with a fluid inlet and a fluid outlet, wherein in the housing an alternating magnetic field generating element is provided, which is separated by at least one wall sealed from the fluid channel, wherein further at least a metallic surface heating element is provided, which is heatable by the alternating magnetic field, wherein the at least one surface heating element is arranged in the fluid channel, wherein at least one of the surface heating elements is formed from a magnetic material.
  • the element generating the alternating magnetic field is arranged outside the fluid channel and the fluid flow through the fluid channel, wherein the surface heating element is arranged in the fluid channel and thus in the fluid flow.
  • separation of the electrical system namely between the element generating the alternating magnetic field outside the fluid channel and the heating surface heating element in the fluid channel, is preferably achieved.
  • a shielding of the alternating magnetic field can be achieved. This is advantageous in order to avoid an unwanted influence on adjacent electrical or electronic devices. Due to the magnetic surface heating element, the propagation of the alternating magnetic field can be attenuated or completely prevented.
  • the element generating the alternating magnetic field is surrounded by the housing substantially of a first element formed of a magnetic material.
  • An element formed of a magnetic material may be used to reduce or completely suppress the propagation of the alternating magnetic field. This is particularly advantageous since the limitation of the propagation can prevent an unwanted negative influence on adjacent electrical and / or electronic systems. In addition, by limiting the propagation unwanted heating of adjacent arranged metallic structures can be avoided.
  • the magnetic alternating field generating element is surrounded in particular in the propagation direction of the alternating magnetic field with an element formed from a magnetic material that the propagation of the alternating magnetic field is reduced or completely prevented.
  • the magnetic material forms a shield for the alternating magnetic field.
  • the Coil according to the invention for example, be surrounded by a hollow cylindrical element by the coil is inserted into this hollow cylindrical element.
  • the element generating the alternating magnetic field be in physical contact with the element formed of a magnetic material or that it be completely covered, similar to a coating.
  • the element formed from a magnetic material is formed substantially following the shape of the element which generates the alternating magnetic field, following.
  • the housing is formed of a non-electrically conductive material.
  • a non-electrically conductive material such as a plastic is particularly advantageous because the total weight of the heater can be reduced thereby.
  • the shape and manufacture of the housing is thereby simpler and less expensive.
  • the alternating magnetic field generating element is surrounded towards the center of the housing substantially by a second element formed of a magnetic material.
  • the propagation of the alternating magnetic field inwardly towards the center of the housing can also be limited by an element formed from a magnetic material. It can be advantageously created in the interior of the housing, a region which is free of influences of the alternating magnetic field.
  • the surface heating elements can be heated in this way by the magnetic alternating field, while the alternating magnetic field is limited to the outside and the center of the housing in its spread.
  • the first element formed of a magnetic material and / or the second element formed of a magnetic material in each case forms a surface heating element.
  • the elements formed from a magnetic material may also constitute surface heating elements, whereby a total of a more compact construction of the heating device can be achieved.
  • At least one of the surface heating elements has a singular or a plurality of openings through which a fluid can flow.
  • an optimized fluid flow can be achieved overall.
  • the mixing of the fluid can be improved, which contributes to a higher temperature homogeneity. This improves the overall efficiency of the heater.
  • a maximum amount of material from 0% to 50%, preferably from 10% to 40%, preferably from 20% to 30% compared to the amount of material of the starting material of respective surface heating element is removed.
  • the surface heating element By providing a remaining minimum amount of material for the surface heating element can be ensured that the shielding effect sufficient remains strong enough to limit the alternating magnetic field sufficiently.
  • the magnetic alternating field generating element is formed by a coil which is connectable to an AC power source.
  • the amount of heat generated in the element generating the alternating magnetic field and / or the amount of heat generated in a control unit which controls and / or regulates the element generating the alternating magnetic field can be used to heat the fluid.
  • thermal bridges which produce a thermally conductive connection between the heat-generating regions and the fluid.
  • the surface heating element can be flowed on one side or on both sides by a fluid.
  • the surface heating element is preferably in direct contact with the fluid flowing through the fluid channel. As a result, a rapid heating of the fluid is achieved.
  • the surface heating element is wetted by a fluid on both sides, wherein the flow direction of the fluid on one side of the surface heating element is equal to or opposite to the flow direction on the other side of the surface heating element.
  • the fluid is passed serially first on one side and then on the other side of the surface heating element. This increases the effectiveness of warming.
  • a preferred embodiment is characterized in that the magnetic alternating field generating element is a substantially hollow cylindrical element.
  • the surface heating element is a substantially hollow cylindrical element.
  • the magnetic alternating field generating element is a hollow cylindrical element, wherein at least one surface heating element is arranged radially inside and / or outside of the hollow cylindrical magnetic field generating element. As a result, a space-saving heating device can be generated.
  • one or more hollow cylindrical surface heating elements are arranged radially inside and outside of the hollow cylindrical element generating an alternating magnetic field. Also, the heat output can be increased.
  • the magnetic alternating field generating element is a substantially hollow cylindrical coil.
  • control unit is connected to the housing or integrated in this.
  • the housing consists of a magnetic field-absorbing or intransparent for magnetic alternating fields material.
  • the wall consists of a magnetic field transparent material.
  • the FIG. 1 shows a view of a heater 1.
  • the heater 1 is formed by a housing 2, which is closed at the top by a cover 6 and down through a lid 7.
  • the housing 2 has a hollow cylindrical shape.
  • a surface heating element 3 is arranged, which is also formed as a hollow cylindrical body. The surface heating element 3 is inserted into the hollow cylinder formed by the housing 2.
  • the surface heating element 3 has, radially running around, a plurality of slots which subdivide the outer surface of the surface heating element 3 into a plurality of sections.
  • the individual sections formed by the slots are deflected in different directions from the base of the surface heating element 3. In some cases, the sections are deflected radially into the center of the surface heating element 3 and partially radially outward toward the housing 2.
  • a further surface heating element 22 is arranged within the surface heating element 3.
  • This surface heating element 22 is likewise designed as a hollow cylindrical body.
  • the surface heating element 22 is not profiled and has a smooth cylindrical outer surface.
  • the surface heating element 3 can abut with its individual deflected portions both on an inner wall of the housing 2 and on an outwardly directed surface of the surface heating element 22.
  • a coil housing 4 is arranged, which is also formed as a hollow cylinder.
  • the outer diameter of the surface heating element 22 is less than the inner diameter of the surface heating element 3 and the outer diameter of the surface heating element 3 is less than the inner diameter of the housing second
  • the sections deflected out of the base surface of the surface heating element 3 can, on the one hand, rest on the inner surface of the housing 2 and, on the other hand, rest on the outer surface of the surface heating element 22.
  • a recess 5 is provided inside the coil housing 4, which in FIG. 1 is shown in a sectional view, which is configured radially encircling.
  • a bobbin can be used inside the coil housing 4, which in FIG. 1 is shown in a sectional view.
  • the bobbin is in the FIG. 1 not shown.
  • a tube 8 is arranged in the center of the bobbin case 4.
  • This tube 8 is also formed as a hollow cylinder.
  • the outer diameter of the tube 8 is smaller than the inner diameter of the hollow cylindrical coil housing 4.
  • the tube 8 is supported at its lower end portion on the lower lid 7. At the upper end portion of the tube 8 there is an air gap between the upper lid 6 and the tube 8. Between the coil housing 4 and the lower lid 7, an air gap 9 is provided.
  • the upper end portion of the bobbin case 4 is in contrast flat against the upper lid 6.
  • the tube 8 is, if it is inductively heated, also a surface heating element.
  • a channel 11 is formed, in which the surface heating element 3 is inserted.
  • a channel 10 is formed between the coil housing 4 and the tube 8.
  • These channels 10, 11, 14 can be flowed through by a fluid. The exact flow order is shown in the following figures.
  • the upper cover 6 is designed such that it closes the housing 2 in a fluid-tight manner at the top.
  • the cover 6 protrudes into the interior of the housing 2 with a cylindrical section which has a radially circumferential groove.
  • the coil housing 4 bears against a surface of the cover 6 in the interior of the housing 2, so that no fluid flow can flow between the coil housing 4 and the cover 6.
  • an air gap 15 is provided between the surface heating element 22 and the cover 6, so that a fluid flow between the channel 10 and the channel 11 may arise over the surface heating element 22 away.
  • the lower lid 7 closes the housing 2 downwards in a fluid-tight manner.
  • the lid 7 has a cylindrical portion, softer on its radial edge surface has a radially circumferential groove, wherein the lid 7 with this cylindrical Section is inserted into the housing 2.
  • the cylindrical shape of the lid 7 and the cover 6 corresponds to the inner contour of the housing 2, so that a fit between the seat cover 6, 7 and the housing 2 can be generated.
  • the lower lid 7 has, subsequent to the first cylindrical portion, a second cylindrical portion which has a smaller outer diameter than the lower first cylindrical portion. On this upper cylindrical portion of smaller diameter, the tube 8 sits on.
  • the air gap 9 is provided between the coil housing 4 and the lid 7, the air gap 9 is provided. Through this air gap 9, a fluid flow between the coil housing 4 and the cover 7 can flow.
  • the surface heating element 22 is pushed over the upper cylindrical portion of the lower lid 7 and seated on the lower cylindrical portion. Between the upper cylindrical portion and theinstitunheizelement 22 fasteners such as fittings, gluing or riveting may be provided. In this way, the surface heating element 22 can be connected to the lower lid 7. Likewise, the tube 8 can be connected via similar fasteners on the lower cover 7.
  • the lower lid 7 has a first fluid port 12 which is disposed on a radial surface of the upper cylindrical portion of the lid 7. Furthermore, the lid 7 has a second fluid connection 13, which is arranged on the lower surface of the lid 7. Depending on the flow direction of the heating device 1, the fluid connection 12 or the fluid connection 13 can serve both as a fluid inlet and as a fluid outlet. Inside the cover 7, a deflection is provided, which deflects the radially extending fluid port 12 in an axial direction.
  • FIG. 2 shows a similar view of the heater 1, as already in FIG. 1 was shown.
  • the tube 8 is shown cut inside the heater 1 along the central axis of the tube 8. It can be seen a mandrel 20 which extends inside the tube 8. Between the mandrel 20, which is formed substantially rod-shaped with a tapered downwardly directed end, and the inner wall of the tube 8, a further channel 21 is formed. Through this channel 21 can also flow a fluid.
  • a fluid could flow into the channel 21 in the interior of the tube 8 via the fluid connection 13.
  • the mandrel 20 flows around.
  • the fluid flows upwardly through the channel 21 towards the lid 6.
  • an air gap whereby the fluid can escape from the tube 8 and into the channel 14 which is between the tube 8 and the coil housing 4 is formed, can flow.
  • the fluid can flow down and finally through the air gap 9, which is formed between the coil housing 4 and the lid 7, to flow into the channel 10, which is formed between the surface heating element 22 and the coil housing 4.
  • an air gap 15 is provided, through which the fluid can flow into the channel 11, which is formed between the surface heating element 22 and the housing inner wall.
  • the fluid can flow downwards and finally flow out of the heating device 1 via the fluid connection 12 in the cover 7.
  • the surface heating element 3 divides the channel 11 into further sub-channels, which can also be flowed through by the fluid.
  • FIG. 3 shows a further schematic view of the heater 1.
  • a bobbin 30 is shown within the bobbin case 4.
  • the bobbin 30 is formed by a hollow cylindrical single-wound coil. Alternatively, a multiple, in particular a double-wound, coil can be provided.
  • Both the tube 8 and the surface heating elements 3 and 22 are formed from a metallic material.
  • the tube 8 and the surface heating elements 3 and 22 can be heated. Both the surface heating elements 3 and 22 and the tube 8 can flow past a fluid which receives the heat from the surface heating elements 3 and 22 or the tube 8 as it flows past.
  • the surface heating element 3 and the tube 8 are advantageously formed of a magnetic material.
  • the magnetic alternating field which is generated by the bobbin 30, curb in its spatial extent. This is particularly advantageous in order to minimize the effects of the alternating magnetic field outside the housing 2 as much as possible.
  • an alternating field-free inner region of the heating device 1 can be realized via a tube 8 made of a magnetic material.
  • the damming of the alternating magnetic field is particularly advantageous to avoid unwanted interactions with adjacent electrical or electronic systems as possible. In addition, it is advantageous to exclude unwanted heating of other metallic materials. Furthermore, a higher efficiency of the heater 1 can be achieved in total by limiting the magnetic alternating field to a concentrated predetermined space, since the losses due to scattering of the alternating magnetic field, are lower.
  • the housing 2 can be formed from a non-metallic or nonelectrically conductive or non-magnetic material such as, for example, a plastic.
  • FIGS. 1 to 3 The execution of the heater 1, as in the FIGS. 1 to 3 is shown, is merely exemplary. From the representation of FIGS. 1 to 3 and the associated description is not restrictive. In the FIGS. 1 to 3 In particular, an embodiment is shown, which forms channels to each other through an arrangement of a plurality of hollow cylindrical bodies, which can be flowed through by a fluid. The inventive principle of the heating device 1 can also be transferred to differently shaped elements of a heating device.
  • FIGS. 1 to 3 merely an exemplary embodiment and have no limiting character.
  • the individual features of the embodiments can be combined with each other.

Description

Technisches GebietTechnical area

Die Erfindung betrifft eine Heizvorrichtung mit einem Gehäuse mit einem darin angeordneten Fluidkanal mit einem Fluideinlass und einem Fluidauslass, wobei in dem Gehäuse ein ein magnetisches Wechselfeld erzeugendes Element vorgesehen ist, welches durch zumindest eine Wandung von dem Fluidkanal abgedichtet abgeteilt ist, wobei weiterhin zumindest ein metallisches Flächenheizelement vorgesehen ist, welches durch das magnetische Wechselfeld aufheizbar ist, wobei das zumindest eine Flächenheizelement im Fluidkanal angeordnet ist.The invention relates to a heating device with a housing having a fluid channel disposed therein with a fluid inlet and a fluid outlet, wherein in the housing an alternating magnetic field generating element is provided, which is separated by at least one wall sealed from the fluid channel, wherein further at least one metallic Surface heating element is provided, which can be heated by the magnetic alternating field, wherein the at least one surface heating element is arranged in the fluid channel.

Stand der TechnikState of the art

Heizvorrichtungen sind im Stand der Technik bekannt. So gibt es luftseitige Heizvorrichtungen, die sogenannte PTC-Heizelemente aufweisen, die elektrisch bestromt werden und sich dadurch erwärmen. Über luftseitige Lamellen, die mit den PTC-Elementen in Kontakt sind, wird die Wärme auf die durchströmende Luft übertragen. Diese Heizvorrichtungen weisen jedoch einen grundsätzlich anderen Aufbau auf, als für flüssige Medien notwendig.Heating devices are known in the art. Thus, there are air-side heating devices that have so-called PTC heating elements, which are electrically energized and thereby heat. Via air-side fins, which are in contact with the PTC elements, the heat is transferred to the air flowing through. However, these heaters have a fundamentally different structure than necessary for liquid media.

Heizvorrichtungen für flüssige Medien sind mit einem geschlossenen Gehäuse versehen, die mit einem Fluidkanal ausgebildet sind, mit einem Fluideinlass und einem Fluidauslass, wobei in das Gehäuse ein Heizelement ragt, das mit einem PTC-Element beheizt wird.Heating devices for liquid media are provided with a closed housing, which are formed with a fluid channel, with a fluid inlet and a Fluid outlet, wherein in the housing a heating element protrudes, which is heated with a PTC element.

Diese Heizvorrichtung für flüssige Medien weisen den Nachteil auf, dass die Wärme in einem anderen Bereich erzeugt wird, als in dem Fluidkanal, durch welchen das flüssige Medium strömt, das erwärmt werden soll. Dadurch wird aufgrund der vorhandenen Übergangswiderstände eine verzögerte Erwärmung erreicht, die als nachteilig zu erachten ist. Die Dokumenten GB 787 125 A und WO 2009/050631 A1 offenbaren Heizvorrichtungen nach dem Stand der Technik.This heating device for liquid media has the disadvantage that the heat is generated in a different area than in the fluid channel through which the liquid medium to be heated flows. As a result, a delayed heating is achieved due to the existing contact resistances, which is to be considered disadvantageous. The documents GB 787 125 A and WO 2009/050631 A1 disclose heaters of the prior art.

Darstellung der Erfindung, Aufgabe, Lösung, VorteilePresentation of the invention, object, solution, advantages

Daher ist es die Aufgabe der vorliegenden Erfindung eine Heizvorrichtung bereitzustellen, die geeignet ist ein Fluid induktiv zu erwärmen, wobei sich die Heizvorrichtung insbesondere durch eine kostengünstige und wenig komplexe Gestaltung auszeichnet.Therefore, it is the object of the present invention to provide a heating device which is suitable for inductively heating a fluid, wherein the heating device is characterized in particular by a cost-effective and less complex design.

Die Aufgabe der vorliegenden Erfindung wird durch eine Heizvorrichtung mit den Merkmalen des Anspruchs 1 gelöst.The object of the present invention is achieved by a heating device with the features of claim 1.

Ein Ausführungsbeispiel der Erfindung betrifft eine Heizvorrichtung mit einem Gehäuse mit einem darin angeordneten Fluidkanal mit einem Fluideinlass und einem Fluidauslass, wobei in dem Gehäuse ein ein magnetisches Wechselfeld erzeugendes Element vorgesehen ist, welches durch zumindest eine Wandung von dem Fluidkanal abgedichtet abgeteilt ist, wobei weiterhin zumindest ein metallisches Flächenheizelement vorgesehen ist, welches durch das magnetische Wechselfeld aufheizbar ist, wobei das zumindest eine Flächenheizelement im Fluidkanal angeordnet ist, wobei zumindest eines der Flächenheizelemente aus einem magnetischen Material gebildet ist.An embodiment of the invention relates to a heating device having a housing with a fluid channel disposed therein with a fluid inlet and a fluid outlet, wherein in the housing an alternating magnetic field generating element is provided, which is separated by at least one wall sealed from the fluid channel, wherein further at least a metallic surface heating element is provided, which is heatable by the alternating magnetic field, wherein the at least one surface heating element is arranged in the fluid channel, wherein at least one of the surface heating elements is formed from a magnetic material.

Dadurch ist das das magnetische Wechselfeld erzeugende Element außerhalb des Fluidkanals und der Fluidströmung durch den Fluidkanal angeordnet, wobei das Flächenheizelement im Fluidkanal und somit in der Fluidströmung angeordnet ist. Dadurch wird bevorzugt eine Trennung des elektrischen Systems, nämlich zwischen dem das magnetische Wechselfeld erzeugenden Element außerhalb des Fluidkanals und dem sich erwärmenden Flächenheizelement in dem Fluidkanal erreicht.As a result, the element generating the alternating magnetic field is arranged outside the fluid channel and the fluid flow through the fluid channel, wherein the surface heating element is arranged in the fluid channel and thus in the fluid flow. As a result, separation of the electrical system, namely between the element generating the alternating magnetic field outside the fluid channel and the heating surface heating element in the fluid channel, is preferably achieved.

Durch das Vorsehen zumindest eines magnetischen Flächenheizelementes kann eine Abschirmung des magnetischen Wechselfeldes erreicht werden. Dies ist vorteilhaft, um eine ungewollte Beeinflussung von benachbarten elektrischen oder elektronischen Einrichtungen zu vermeiden. Durch das magnetische Flächenheizelement, kann die Ausbreitung des magnetischen Wechselfeldes abgeschwächt oder vollständig unterbunden werden.By providing at least one magnetic surface heating element, a shielding of the alternating magnetic field can be achieved. This is advantageous in order to avoid an unwanted influence on adjacent electrical or electronic devices. Due to the magnetic surface heating element, the propagation of the alternating magnetic field can be attenuated or completely prevented.

Es wird ebenfalls beansprucht, dass das das magnetische Wechselfeld erzeugende Element hin zum Gehäuse im Wesentlichen von einem ersten aus einem magnetischen Material gebildeten Element umgeben ist.It is also claimed that the element generating the alternating magnetic field is surrounded by the housing substantially of a first element formed of a magnetic material.

Ein aus einem magnetischen Material gebildetes Element kann verwendet werden, um die Ausbreitung des magnetischen Wechselfeldes zu reduzieren oder gänzlich zu unterdrücken. Dies ist besonders vorteilhaft, da durch die Begrenzung der Ausbreitung eine ungewollte negative Beeinflussung von benachbarten elektrischen und/oder elektronischen Systemen vermieden werden kann. Außerdem kann durch die Begrenzung der Ausbreitung eine ungewollte Erwärmung von benachbart angeordneten metallischen Strukturen vermieden werden.An element formed of a magnetic material may be used to reduce or completely suppress the propagation of the alternating magnetic field. This is particularly advantageous since the limitation of the propagation can prevent an unwanted negative influence on adjacent electrical and / or electronic systems. In addition, by limiting the propagation unwanted heating of adjacent arranged metallic structures can be avoided.

Mit umgeben ist vorteilhafterweise gemeint, dass das das magnetische Wechselfeld erzeugende Element insbesondere in der Ausbreitungsrichtung des magnetischen Wechselfeldes derart mit einem aus einem magnetischen Material gebildeten Element umgeben ist, dass die Ausbreitung des magnetischen Wechselfeldes reduziert oder gänzlich verhindert wird. Das magnetische Material bildet dabei eine Abschirmung für das magnetische Wechselfeld. Im Falle einer im Wesentlichen hohlzylindrischen Spule als das das magnetische Wechselfeld erzeugende Element, könnte die Spule erfindungsgemäß beispielsweise mit einem hohlzylindrischen Element umgeben sein, indem die Spule in dieses hohlzylindrische Element eingesteckt ist.With surrounded is advantageously meant that the magnetic alternating field generating element is surrounded in particular in the propagation direction of the alternating magnetic field with an element formed from a magnetic material that the propagation of the alternating magnetic field is reduced or completely prevented. The magnetic material forms a shield for the alternating magnetic field. In the case of a substantially hollow cylindrical coil as the alternating magnetic field generating element, the Coil according to the invention, for example, be surrounded by a hollow cylindrical element by the coil is inserted into this hollow cylindrical element.

Dabei ist es nicht notwendig, dass das das magnetische Wechselfeld erzeugende Element in physischem Kontakt mit dem aus einem magnetischen Material gebildeten Element steht oder dieses, ähnlich einer Beschichtung, vollständig umfasst wird. Vorteilhafterweise ist das aus einem magnetischen Material gebildete Element dabei im Wesentlichen der Form des Elementes, welches das magnetische Wechselfeld erzeugt, folgend ausgebildet.In this case, it is not necessary that the element generating the alternating magnetic field be in physical contact with the element formed of a magnetic material or that it be completely covered, similar to a coating. Advantageously, the element formed from a magnetic material is formed substantially following the shape of the element which generates the alternating magnetic field, following.

Weiterhin ist es zu bevorzugen, wenn das Gehäuse aus einem nicht elektrisch leitfähigen Material gebildet ist.Furthermore, it is preferable if the housing is formed of a non-electrically conductive material.

Ein nicht elektrisch leitfähiges Material wie beispielsweise ein Kunststoff ist besonders vorteilhaft, da das Gesamtgewicht der Heizvorrichtung dadurch reduziert werden kann. Außerdem ist die Formgebung und Herstellung des Gehäuses dadurch einfacher und kostengünstiger.A non-electrically conductive material such as a plastic is particularly advantageous because the total weight of the heater can be reduced thereby. In addition, the shape and manufacture of the housing is thereby simpler and less expensive.

Es wird ebenfalls beansprucht, dass das das magnetische Wechselfeld erzeugende Element hin zur Mitte des Gehäuses im Wesentlichen von einem zweiten aus einem magnetischen Material gebildeten Element umgeben ist.It is also claimed that the alternating magnetic field generating element is surrounded towards the center of the housing substantially by a second element formed of a magnetic material.

Analog zu der Begrenzung der Ausbreitung des magnetischen Wechselfeldes nach außen zum Gehäuse hin, kann auch die Ausbreitung des magnetischen Wechselfeldes nach innen hin zur Mitte des Gehäuses durch ein aus einem magnetischen Material gebildeten Element begrenzt werden. Dabei kann vorteilhafterweise im Inneren des Gehäuses ein Bereich geschaffen werden, welcher frei von Einflüssen des magnetischen Wechselfeldes ist.Analogous to the limitation of the propagation of the alternating magnetic field outwards towards the housing, the propagation of the alternating magnetic field inwardly towards the center of the housing can also be limited by an element formed from a magnetic material. It can be advantageously created in the interior of the housing, a region which is free of influences of the alternating magnetic field.

Es wird ebenfalls beansprucht, dass zwischen dem ersten aus einem magnetischen Material gebildeten Element und dem zweiten aus einem magnetischen Material gebildeten Element eine Einzahl oder Mehrzahl von Flächenheizelementen angeordnet ist, welche durch das magnetische Wechselfeld aufheizbar sind.It is also claimed that between the first element formed of a magnetic material and the second of a magnetic material formed element a number or plurality of surface heating elements is arranged, which are heatable by the alternating magnetic field.

Die Flächenheizelemente können auf diese Weise durch das magnetische Wechselfeld aufgeheizt werden, während das magnetische Wechselfeld nach außen hin und zur Mitte des Gehäuses in seiner Ausbreitung begrenzt wird.The surface heating elements can be heated in this way by the magnetic alternating field, while the alternating magnetic field is limited to the outside and the center of the housing in its spread.

Weiterhin ist es zu bevorzugen, wenn das erste aus einem magnetischen Material gebildete Element und/oder das zweite aus einem magnetischen Material gebildete Element jeweils ein Flächenheizelement bildet.Furthermore, it is preferable if the first element formed of a magnetic material and / or the second element formed of a magnetic material in each case forms a surface heating element.

Die aus einem magnetischen Material gebildeten Elemente können ebenfalls Flächenheizelemente darstellen, wodurch insgesamt ein kompakterer Aufbau der Heizvorrichtung erreicht werden kann.The elements formed from a magnetic material may also constitute surface heating elements, whereby a total of a more compact construction of the heating device can be achieved.

Auch ist es vorteilhaft, wenn zumindest eines der Flächenheizelemente eine Einzahl oder Mehrzahl von Öffnungen aufweist, welche von einem Fluid durchströmbar sind.It is also advantageous if at least one of the surface heating elements has a singular or a plurality of openings through which a fluid can flow.

Durch Öffnungen, welche von einem Fluid umströmt oder durchströmt werden können, kann insgesamt eine optimierte Fluidströmung erreicht werden. Außerdem kann die Durchmischung des Fluids verbessert werden, was zu einer höheren Temperaturhomogenität beiträgt. Dies verbessert insgesamt den Wirkungsgrad der Heizvorrichtung.Through openings which can be flowed around or flowed through by a fluid, an optimized fluid flow can be achieved overall. In addition, the mixing of the fluid can be improved, which contributes to a higher temperature homogeneity. This improves the overall efficiency of the heater.

Außerdem ist es zweckmäßig, wenn durch die Einzahl oder Mehrzahl der Öffnungen in dem jeweiligen Flächenheizelement maximal eine Materialmenge von 0% bis 50%, vorzugsweise von 10% bis 40%, dabei vorzugsweise von 20% bis 30% im Vergleich zur Materialmenge des Ausgangsmaterials des jeweiligen Flächenheizelementes entfernt wird.In addition, it is expedient if by the number or plurality of openings in the respective surface heating element a maximum amount of material from 0% to 50%, preferably from 10% to 40%, preferably from 20% to 30% compared to the amount of material of the starting material of respective surface heating element is removed.

Durch das Vorsehen einer verbleibenden Mindestmaterialmenge für das Flächenheizelement kann sichergestellt werden, dass die abschirmende Wirkung ausreichend stark bleibt, um das magnetische Wechselfeld ausreichend zu begrenzen. Dies gilt insbesondere für Flächenheizelemente, die aus einem magnetischen Material gefertigt sind und im Bereich der Mitte des Gehäuses oder an einer der Innenflächen des Gehäuses angeordnet sind und unter anderem den Zweck erfüllen die Ausbreitung des magnetischen Wechselfeldes zu begrenzen.By providing a remaining minimum amount of material for the surface heating element can be ensured that the shielding effect sufficient remains strong enough to limit the alternating magnetic field sufficiently. This applies in particular to surface heating elements, which are made of a magnetic material and are arranged in the region of the center of the housing or on one of the inner surfaces of the housing and, inter alia, fulfill the purpose of limiting the propagation of the alternating magnetic field.

Gemäß einer besonders günstigen Weiterbildung der Erfindung, kann es vorgesehen sein, dass das das magnetische Wechselfeld erzeugende Element durch eine Spule gebildet ist, welche mit einer Wechselstromquelle verbindbar ist.According to a particularly advantageous embodiment of the invention, it may be provided that the magnetic alternating field generating element is formed by a coil which is connectable to an AC power source.

Weiterhin ist es zu bevorzugen, wenn die in dem das magnetische Wechselfeld erzeugende Element entstehende Wärmemenge und/oder die Wärmemenge, welche in einer Steuereinheit entsteht, welche das das magnetische Wechselfeld erzeugende Element steuert und/oder regelt, zur Aufheizung des Fluids verwendbar ist.Furthermore, it is preferable if the amount of heat generated in the element generating the alternating magnetic field and / or the amount of heat generated in a control unit which controls and / or regulates the element generating the alternating magnetic field can be used to heat the fluid.

Dies kann beispielsweise über thermische Brücken erreicht werden, welche eine thermisch leitende Verbindung zwischen den wärmeerzeugenden Bereichen und dem Fluid erzeugen.This can be achieved, for example, via thermal bridges, which produce a thermally conductive connection between the heat-generating regions and the fluid.

Auch ist es vorteilhaft, wenn das Flächenheizelement einseitig oder beidseitig von einem Fluid beströmbar ist.It is also advantageous if the surface heating element can be flowed on one side or on both sides by a fluid.

Das Flächenheizelement steht bevorzugt in direktem Kontakt mit dem durch den Fluidkanal durchströmenden Fluid. Dadurch wird eine schnelle Erwärmung des Fluids erreicht.The surface heating element is preferably in direct contact with the fluid flowing through the fluid channel. As a result, a rapid heating of the fluid is achieved.

Weiterhin kann es besonders vorteilhaft sein, wenn das Flächenheizelement beidseitig von einem Fluid beströmbar ist, wobei die Strömungsrichtung des Fluids auf der einen Seite des Flächenheizelementes gleich oder entgegengesetzt der Strömungsrichtung auf der anderen Seite des Flächenheizelementes ist. Dadurch wird das Fluid seriell erst an der einen Seite und danach an der anderen Seite des Flächenheizelementes vorbei geführt. Dies steigert die Effektivität der Erwärmung.Furthermore, it may be particularly advantageous if the surface heating element is wetted by a fluid on both sides, wherein the flow direction of the fluid on one side of the surface heating element is equal to or opposite to the flow direction on the other side of the surface heating element. As a result, the fluid is passed serially first on one side and then on the other side of the surface heating element. This increases the effectiveness of warming.

Ein bevorzugtes Ausführungsbeispiel ist dadurch gekennzeichnet, dass das ein magnetisches Wechselfeld erzeugende Element ein im Wesentlichen hohlzylindrisches Element ist.A preferred embodiment is characterized in that the magnetic alternating field generating element is a substantially hollow cylindrical element.

Auch ist es zu bevorzugen, wenn das Flächenheizelement ein im Wesentlichen hohlzylindrisches Element ist.It is also preferable if the surface heating element is a substantially hollow cylindrical element.

Weiterhin ist es zu bevorzugen, wenn das ein magnetisches Wechselfeld erzeugende Element ein hohlzylindrisches Element ist, wobei zumindest ein Flächenheizelement radial innerhalb und/oder außerhalb des hohlzylindrischen das magnetische Wechselfeld erzeugenden Elementes angeordnet ist. Dadurch kann eine bauraumgünstige Heizvorrichtung erzeugt werden.Furthermore, it is preferable if the magnetic alternating field generating element is a hollow cylindrical element, wherein at least one surface heating element is arranged radially inside and / or outside of the hollow cylindrical magnetic field generating element. As a result, a space-saving heating device can be generated.

Auch ist es zu bevorzugen, wenn radial innerhalb und außerhalb des hohlzylindrischen das ein magnetisches Wechselfeld erzeugenden Elements ein oder mehrere hohlzylindrische Flächenheizelemente angeordnet sind. Auch dadurch kann die Wärmeleistung erhöht werden.It is also preferable if one or more hollow cylindrical surface heating elements are arranged radially inside and outside of the hollow cylindrical element generating an alternating magnetic field. Also, the heat output can be increased.

Darüber hinaus kann es vorgesehen sein, dass das ein magnetisches Wechselfeld erzeugendes Element eine im Wesentlichen hohlzylindrische Spule ist.Moreover, it can be provided that the magnetic alternating field generating element is a substantially hollow cylindrical coil.

Auch ist es vorteilhaft, wenn die Steuereinheit mit dem Gehäuse verbunden oder in dieses integriert ist.It is also advantageous if the control unit is connected to the housing or integrated in this.

Darüber hinaus kann es vorteilhaft sein, wenn das Gehäuse aus einem magnetfeldabsorbierenden oder für magnetische Wechselfelder intransparenten Material besteht.In addition, it may be advantageous if the housing consists of a magnetic field-absorbing or intransparent for magnetic alternating fields material.

Weiterhin ist es zweckmäßig, wenn die Wandung aus einem magnetfeldtransparenten Material besteht.Furthermore, it is expedient if the wall consists of a magnetic field transparent material.

Vorteilhafte Weiterbildungen der vorliegenden Erfindung sind in den Unteransprüchen und in der nachfolgenden Figurenbeschreibung beschrieben.Advantageous developments of the present invention are described in the subclaims and in the following description of the figures.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Im Folgenden wird die Erfindung anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnungen detailliert erläutert. In den Zeichnungen zeigen:

Fig.1
eine Ansicht einer erfindungsgemäßen Heizvorrichtung, wobei das äußere Gehäuse nur teilweise bzw. transparent dargestellt ist,
Fig. 2
eine weitere Ansicht der Heizvorrichtung gemäß Fig. 1, wobei das zentrale Rohr in der Heizvorrichtung in einem Teilschnitt darge-stellt ist, wodurch der Strömungskanal und der Dorn im Inneren des Rohrs zu erkennen sind, und
Fig. 3
eine weitere Ansicht der Heizvorrichtung gemäß der Fig. 1 und 2, wobei eine Spule dargestellt ist, welche ein magnetisches Wechselfeld erzeugt, wodurch Heizelemente im Inneren der Heizvorrichtung aufgeheizt werden können.
In the following the invention will be explained in detail by means of embodiments with reference to the drawings. In the drawings show:
Fig.1
a view of a heating device according to the invention, wherein the outer housing is shown only partially or transparent,
Fig. 2
another view of the heater according to Fig. 1 wherein the central tube in the heater is shown in a partial section, whereby the flow channel and the mandrel can be seen inside the tube, and
Fig. 3
another view of the heater according to the Fig. 1 and 2 wherein a coil is shown which generates an alternating magnetic field, whereby heating elements can be heated in the interior of the heating device.

Bevorzugte Ausführung der ErfindungPreferred embodiment of the invention

Die Figur 1 zeigt eine Ansicht einer Heizvorrichtung 1. Die Heizvorrichtung 1 ist durch ein Gehäuse 2 gebildet, welches nach oben hin durch einen Deckel 6 und nach unten hin durch einen Deckel 7 abgeschlossen ist. Das Gehäuse 2 weist dabei eine hohlzylindrische Form auf. Innerhalb des Gehäuses 2 ist ein Flächenheizelement 3 angeordnet, welches ebenfalls als hohlzylindrischer Körper ausgebildet ist. Das Flächenheizelement 3 ist in den durch das Gehäuse 2 gebildeten Hohlzylinder eingesetzt.The FIG. 1 shows a view of a heater 1. The heater 1 is formed by a housing 2, which is closed at the top by a cover 6 and down through a lid 7. The housing 2 has a hollow cylindrical shape. Within the housing 2, a surface heating element 3 is arranged, which is also formed as a hollow cylindrical body. The surface heating element 3 is inserted into the hollow cylinder formed by the housing 2.

Das Flächenheizelement 3 weist radial umlaufend eine Mehrzahl von Schlitzen auf, welche die Außenfläche des Flächenheizelementes 3 in eine Mehrzahl von Abschnitten unterteilt. Die einzelnen durch die Schlitze gebildeten Abschnitte sind in unterschiedliche Richtungen aus der Grundfläche des Flächenheizelementes 3 ausgelenkt. Teilweise sind die Abschnitte radial ins Zentrum des Flächenheizelementes 3 ausgelenkt und teilweise radial nach außen hin zum Gehäuse 2.The surface heating element 3 has, radially running around, a plurality of slots which subdivide the outer surface of the surface heating element 3 into a plurality of sections. The individual sections formed by the slots are deflected in different directions from the base of the surface heating element 3. In some cases, the sections are deflected radially into the center of the surface heating element 3 and partially radially outward toward the housing 2.

Innerhalb des Flächenheizelementes 3 ist ein weiteres Flächenheizelement 22 angeordnet. Dieses Flächenheizelement 22 ist ebenfalls als hohlzylindrischer Körper ausgebildet. Im Gegensatz zum äußeren Flächenheizelement 3 ist das Flächenheizelement 22 nicht profiliert und weist eine glatte zylindrische Mantelfläche auf.Within the surface heating element 3, a further surface heating element 22 is arranged. This surface heating element 22 is likewise designed as a hollow cylindrical body. In contrast to the outer surface heating element 3, the surface heating element 22 is not profiled and has a smooth cylindrical outer surface.

Das Flächenheizelement 3 kann mit einzelnen seiner ausgelenkten Abschnitte sowohl an einer Innenwandung des Gehäuses 2 als auch an einer nach außen gerichteten Fläche des Flächenheizelementes 22 anliegen.The surface heating element 3 can abut with its individual deflected portions both on an inner wall of the housing 2 and on an outwardly directed surface of the surface heating element 22.

Innerhalb des Flächenheizelementes 2 ist ein Spulengehäuse 4 angeordnet, welches ebenfalls hohlzylindrisch ausgebildet ist. Der Außendurchmesser des Spulengehäuses 4 ist geringer als der Innendurchmesser des Flächenheizelementes 22. Der Außendurchmesser des Flächenheizelementes 22 ist geringer als der Innendurchmesser des Flächenheizelementes 3 und der Außendurchmesser des Flächenheizelementes 3 ist geringer als der Innendurchmesser des Gehäuses 2.Within the surface heating element 2, a coil housing 4 is arranged, which is also formed as a hollow cylinder. The outer diameter of the surface heating element 22 is less than the inner diameter of the surface heating element 3 and the outer diameter of the surface heating element 3 is less than the inner diameter of the housing second

Je nach Ausgestaltung können die aus der Grundfläche des Flächenheizelementes 3 ausgelenkten Abschnitte einerseits an der Innenfläche des Gehäuses 2 anliegen und andererseits an der Außenfläche des Flächenheizelementes 22 anliegen.Depending on the configuration, the sections deflected out of the base surface of the surface heating element 3 can, on the one hand, rest on the inner surface of the housing 2 and, on the other hand, rest on the outer surface of the surface heating element 22.

Im Inneren des Spulengehäuses 4, welches in Figur 1 in einer Schnittdarstellung gezeigt ist, ist eine Aussparung 5 vorgesehen, welche radial umlaufend ausgestaltet ist. In dieser Aussparung 5 kann ein Spulenkörper eingesetzt werden. Der Spulenkörper ist in der Figur 1 nicht dargestellt.Inside the coil housing 4, which in FIG. 1 is shown in a sectional view, a recess 5 is provided, which is configured radially encircling. In this recess 5, a bobbin can be used. The bobbin is in the FIG. 1 not shown.

Im Zentrum des Spulengehäuses 4 ist ein Rohr 8 angeordnet. Dieses Rohr 8 ist ebenfalls hohlzylindrisch ausgebildet. Der Außendurchmesser des Rohres 8 ist geringer als der Innendurchmesser des hohlzylindrisch ausgestalteten Spulengehäuses 4. Das Rohr 8 ist an seinem unteren Endbereich an dem unteren Deckel 7 abgestützt. Am oberen Endbereich des Rohres 8 besteht ein Luftspalt zwischen dem oberen Deckel 6 und dem Rohr 8. Zwischen dem Spulengehäuse 4 und dem unteren Deckel 7 ist ein Luftspalt 9 vorgesehen. Der obere Endbereich des Spulengehäuses 4 liegt im Gegensatz dazu flächig an dem oberen Deckel 6 an. Das Rohr 8 stellt, sofern es induktiv erwärmbar ist, ebenfalls ein Flächenheizelement dar.In the center of the bobbin case 4, a tube 8 is arranged. This tube 8 is also formed as a hollow cylinder. The outer diameter of the tube 8 is smaller than the inner diameter of the hollow cylindrical coil housing 4. The tube 8 is supported at its lower end portion on the lower lid 7. At the upper end portion of the tube 8 there is an air gap between the upper lid 6 and the tube 8. Between the coil housing 4 and the lower lid 7, an air gap 9 is provided. The upper end portion of the bobbin case 4 is in contrast flat against the upper lid 6. The tube 8 is, if it is inductively heated, also a surface heating element.

Zwischen dem Gehäuse 2 und dem Flächenheizelement 22 bildet sich ein Kanal 11 aus, in welchen das Flächenheizelement 3 eingesetzt ist. Zwischen dem Flächenheizelement 22 und dem Spulengehäuse 4 bildet sich ein Kanal 10 aus. Schließlich bildet sich zwischen dem Spulengehäuse 4 und dem Rohr 8 ein Kanal 14 aus. Diese Kanäle 10, 11, 14 können von einem Fluid durchströmt werden. Die genaue Durchströmungsreihenfolge wird in den nachfolgenden Figuren dargestellt.Between the housing 2 and the surface heating element 22, a channel 11 is formed, in which the surface heating element 3 is inserted. Between the surface heating element 22 and the coil housing 4, a channel 10 is formed. Finally, a channel 14 is formed between the coil housing 4 and the tube 8. These channels 10, 11, 14 can be flowed through by a fluid. The exact flow order is shown in the following figures.

Der obere Deckel 6 ist derart ausgestaltet, dass er das Gehäuse 2 nach oben hin fluiddicht abschließt. Dazu ragt der Deckel 6 mit einem zylindrischen Abschnitt, welcher eine radial umlaufende Nut aufweist, in das Innere des Gehäuses 2 hinein. Wie bereits beschrieben, liegt das Spulengehäuse 4 an einer Fläche des Deckels 6 im Inneren des Gehäuses 2 an, so dass kein Fluidstrom zwischen dem Spulengehäuse 4 und dem Deckel 6 strömen kann.The upper cover 6 is designed such that it closes the housing 2 in a fluid-tight manner at the top. For this purpose, the cover 6 protrudes into the interior of the housing 2 with a cylindrical section which has a radially circumferential groove. As already described, the coil housing 4 bears against a surface of the cover 6 in the interior of the housing 2, so that no fluid flow can flow between the coil housing 4 and the cover 6.

Zwischen dem Flächenheizelement 22 und dem Deckel 6 ist ein Luftspalt 15 vorgesehen, so dass eine Fluidströmung zwischen dem Kanal 10 und dem Kanal 11 über das Flächenheizelement 22 hinweg entstehen kann.Between the surface heating element 22 and the cover 6, an air gap 15 is provided, so that a fluid flow between the channel 10 and the channel 11 may arise over the surface heating element 22 away.

Der untere Deckel 7 schließt das Gehäuse 2 nach unten hin fluiddicht ab. Hierzu weist der Deckel 7 einen zylindrischen Abschnitt auf, weicher an seiner radialen Randfläche eine radial umlaufende Nut aufweist, wobei der Deckel 7 mit diesem zylindrischen Abschnitt in das Gehäuse 2 eingesetzt ist. Die zylindrische Form des Deckels 7 bzw. des Deckels 6 korrespondiert dabei mit der Innenkontur des Gehäuses 2, so dass ein passgenauer Sitz zwischen dem Deckel 6, 7 und dem Gehäuse 2 erzeugbar ist.The lower lid 7 closes the housing 2 downwards in a fluid-tight manner. For this purpose, the lid 7 has a cylindrical portion, softer on its radial edge surface has a radially circumferential groove, wherein the lid 7 with this cylindrical Section is inserted into the housing 2. The cylindrical shape of the lid 7 and the cover 6 corresponds to the inner contour of the housing 2, so that a fit between the seat cover 6, 7 and the housing 2 can be generated.

Der untere Deckel 7 weist nachfolgend auf den ersten zylindrischen Bereich einen zweiten zylindrischen Bereich auf, welcher einen geringeren Außendurchmesser als der untere erste zylindrische Bereich aufweist. Auf diesem oberen zylindrischen Bereich geringeren Durchmessers sitzt das Rohr 8 auf.The lower lid 7 has, subsequent to the first cylindrical portion, a second cylindrical portion which has a smaller outer diameter than the lower first cylindrical portion. On this upper cylindrical portion of smaller diameter, the tube 8 sits on.

Zwischen dem Spulengehäuse 4 und dem Deckel 7 ist der Luftspalt 9 vorgesehen. Durch diesen Luftspalt 9 kann ein Fluidstrom zwischen dem Spulengehäuse 4 und dem Deckel 7 strömen. Das Flächenheizelement 22 ist über den oberen zylindrischen Bereich des unteren Deckels 7 geschoben und sitzt auf dem unteren zylindrischen Bereich auf. Zwischen dem oberen zylindrischen Bereich und dem Flächenheizelement 22 können Befestigungselemente wie etwa Verschraubungen, Verklebungen oder Vernietungen vorgesehen sein. Auf diese Weise kann das Flächenheizelement 22 am unteren Deckel 7 angebunden werden. Ebenso kann das Rohr 8 über ähnliche Befestigungen am unteren Deckel 7 angebunden werden.Between the coil housing 4 and the lid 7, the air gap 9 is provided. Through this air gap 9, a fluid flow between the coil housing 4 and the cover 7 can flow. The surface heating element 22 is pushed over the upper cylindrical portion of the lower lid 7 and seated on the lower cylindrical portion. Between the upper cylindrical portion and the Flächenheizelement 22 fasteners such as fittings, gluing or riveting may be provided. In this way, the surface heating element 22 can be connected to the lower lid 7. Likewise, the tube 8 can be connected via similar fasteners on the lower cover 7.

Der untere Deckel 7 weist einen ersten Fluidanschluss 12 auf, welcher an einer radialen Fläche des oberen zylindrischen Abschnitts des Deckels 7 angeordnet ist. Weiterhin weist der Deckel 7 einen zweiten Fluidanschluss 13 auf, welcher an der unteren Fläche des Deckels 7 angeordnet ist. Der Fluidanschluss 12 bzw. der Fluidanschluss 13 können jeweils je nach Strömungsrichtung der Heizvorrichtung 1 sowohl als Fluideinlass als auch als Fluidauslass dienen. Im Inneren des Deckels 7 ist eine Umlenkung vorgesehen, welche den radial verlaufenden Fluidanschluss 12 in eine axiale Richtung umlenkt.The lower lid 7 has a first fluid port 12 which is disposed on a radial surface of the upper cylindrical portion of the lid 7. Furthermore, the lid 7 has a second fluid connection 13, which is arranged on the lower surface of the lid 7. Depending on the flow direction of the heating device 1, the fluid connection 12 or the fluid connection 13 can serve both as a fluid inlet and as a fluid outlet. Inside the cover 7, a deflection is provided, which deflects the radially extending fluid port 12 in an axial direction.

Die Figur 2 zeigt eine ähnliche Darstellung der Heizvorrichtung 1, wie sie bereits in Figur 1 gezeigt wurde. Abweichend zu der Darstellung der Figur 1 ist das Rohr 8 im Inneren der Heizvorrichtung 1 entlang der Mittelachse des Rohres 8 geschnitten dargestellt. Es ist ein Dorn 20 zu erkennen, welcher im Inneren des Rohres 8 verläuft. Zwischen dem Dorn 20, der im Wesentlichen stabförmig mit einem spitz zulaufenden nach unten gerichteten Ende ausgebildet ist, und der Innenwandung des Rohres 8 bildet sich ein weiterer Kanal 21 aus. Durch diesen Kanal 21 kann ebenfalls ein Fluid strömen.The FIG. 2 shows a similar view of the heater 1, as already in FIG. 1 was shown. Deviating from the illustration of FIG. 1 the tube 8 is shown cut inside the heater 1 along the central axis of the tube 8. It can be seen a mandrel 20 which extends inside the tube 8. Between the mandrel 20, which is formed substantially rod-shaped with a tapered downwardly directed end, and the inner wall of the tube 8, a further channel 21 is formed. Through this channel 21 can also flow a fluid.

In einer möglichen Durchströmungsreihenfolge könnte über den Fluidanschluss 13 ein Fluid in den Kanal 21 im Inneren des Rohres 8 einströmen. Dort wird der Dorn 20 umströmt. Das Fluid strömt nach oben durch den Kanal 21 hin zum Deckel 6. Zwischen dem Rohr 8 und dem Deckel 6 ist ein Luftspalt vorgesehen, wodurch das Fluid aus dem Rohr 8 austreten kann und in den Kanal 14, welcher zwischen dem Rohr 8 und dem Spulengehäuse 4 ausgebildet ist, einströmen kann. Dort kann das Fluid nach unten strömen und durch den Luftspalt 9, welcher zwischen dem Spulengehäuse 4 und dem Deckel 7 ausgebildet ist, schließlich in den Kanal 10 strömen, welcher zwischen dem Flächenheizelement 22 und dem Spulengehäuse 4 ausgebildet ist. Im oberen Bereich ist zwischen dem Flächenheizelement 22 und dem Deckel 6 ein Luftspalt 15 vorgesehen, durch welchen das Fluid in den Kanal 11 strömen kann, welcher zwischen dem Flächenheizelement 22 und der Gehäuseinnenwand ausgebildet ist. Entlang des Kanals 11 kann das Fluid nach unten strömen und schließlich über den Fluidanschluss 12 im Deckel 7 aus der Heizvorrichtung 1 ausströmen. Das Flächenheizelement 3 unterteilt dabei den Kanal 11 in weitere Teilkanäle, die ebenfalls vom Fluid durchströmt werden können.In a possible flow-through sequence, a fluid could flow into the channel 21 in the interior of the tube 8 via the fluid connection 13. There, the mandrel 20 flows around. The fluid flows upwardly through the channel 21 towards the lid 6. Between the tube 8 and the lid 6 there is provided an air gap whereby the fluid can escape from the tube 8 and into the channel 14 which is between the tube 8 and the coil housing 4 is formed, can flow. There, the fluid can flow down and finally through the air gap 9, which is formed between the coil housing 4 and the lid 7, to flow into the channel 10, which is formed between the surface heating element 22 and the coil housing 4. In the upper area between the surface heating element 22 and the cover 6, an air gap 15 is provided, through which the fluid can flow into the channel 11, which is formed between the surface heating element 22 and the housing inner wall. Along the channel 11, the fluid can flow downwards and finally flow out of the heating device 1 via the fluid connection 12 in the cover 7. The surface heating element 3 divides the channel 11 into further sub-channels, which can also be flowed through by the fluid.

Die Figur 3 zeigt eine weitere schematische Ansicht der Heizvorrichtung 1. Im Unterschied zu den Figuren 1 und 2 ist in Figur 3 ein Spulenkörper 30 innerhalb des Spulengehäuses 4 dargestellt. Der Spulenkörper 30 ist durch eine hohlzylindrische einfach gewickelte Spule gebildet. Alternativ kann auch eine mehrfach, insbesondere eine zweifach gewickelte, Spule vorgesehen werden.The FIG. 3 shows a further schematic view of the heater 1. In contrast to the Figures 1 and 2 is in FIG. 3 a bobbin 30 is shown within the bobbin case 4. The bobbin 30 is formed by a hollow cylindrical single-wound coil. Alternatively, a multiple, in particular a double-wound, coil can be provided.

Durch eine Bestromung des Spulenkörpers 30, beispielsweise mit einer Wechselspannung, kann ein magnetisches Feld innerhalb der Heizvorrichtung 1 erzeugt werden. Sowohl das Rohr 8 als auch die Flächenheizelemente 3 und 22 sind dabei aus einem metallischen Material gebildet.By energizing the bobbin 30, for example with an AC voltage, a magnetic field within the heater 1 can be generated. Both the tube 8 and the surface heating elements 3 and 22 are formed from a metallic material.

Aufgrund des magnetischen Wechselfeldes, das durch den Spulenkörper 30 erzeugt wird, können das Rohr 8 sowie die Flächenheizelemente 3 und 22 erwärmt werden. Sowohl an den Flächenheizelementen 3 und 22 als auch am Rohr 8 kann ein Fluid vorbeiströmen, welches im Vorbeiströmen die Wärme von den Flächenheizelementen 3 und 22 bzw. dem Rohr 8 aufnimmt.Due to the alternating magnetic field generated by the bobbin 30, the tube 8 and the surface heating elements 3 and 22 can be heated. Both the surface heating elements 3 and 22 and the tube 8 can flow past a fluid which receives the heat from the surface heating elements 3 and 22 or the tube 8 as it flows past.

Das Flächenheizelement 3 bzw. das Rohr 8 sind vorteilhafterweise aus einem magnetischen Material gebildet. Auf diese Weise ist es möglich das magnetische Wechselfeld, welches durch den Spulenkörper 30 erzeugt wird, in seiner räumlichen Ausdehnung einzudämmen. Dies ist insbesondere vorteilhaft, um die Auswirkungen des magnetischen Wechselfeldes außerhalb des Gehäuses 2 möglichst zu minimieren. Außerdem kann über ein Rohr 8 aus einem magnetischen Material ein wechselfeldfreier Innenbereich der Heizvorrichtung 1 realisiert werden.The surface heating element 3 and the tube 8 are advantageously formed of a magnetic material. In this way it is possible the magnetic alternating field, which is generated by the bobbin 30, curb in its spatial extent. This is particularly advantageous in order to minimize the effects of the alternating magnetic field outside the housing 2 as much as possible. In addition, an alternating field-free inner region of the heating device 1 can be realized via a tube 8 made of a magnetic material.

Das Eindämmen des magnetischen Wechselfeldes ist insbesondere vorteilhaft, um ungewünschte Wechselwirkungen mit benachbarten elektrischen oder elektronischen Systemen möglichst zu vermeiden. Außerdem ist es vorteilhaft, um ungewollte Erwärmungen anderer metallischer Materialien auszuschließen. Weiterhin kann durch eine Begrenzung des magnetischen Wechselfeldes auf einen konzentrierten vorbestimmten Raum eine höhere Effizienz der Heizvorrichtung 1 insgesamt erreicht werden, da die Verluste, aufgrund von Streuung des magnetischen Wechselfeldes, geringer sind.The damming of the alternating magnetic field is particularly advantageous to avoid unwanted interactions with adjacent electrical or electronic systems as possible. In addition, it is advantageous to exclude unwanted heating of other metallic materials. Furthermore, a higher efficiency of the heater 1 can be achieved in total by limiting the magnetic alternating field to a concentrated predetermined space, since the losses due to scattering of the alternating magnetic field, are lower.

Das Gehäuse 2 kann in einer vorteilhaften Ausgestaltung, insbesondere dann, wenn das Flächenheizelement 3 aus einem magnetischen Material gebildet ist, aus einem nichtmetallischen oder nichtelektrisch leitenden bzw. nicht magnetischen Material wie beispielsweise einem Kunststoff gebildet sein.In an advantageous embodiment, in particular when the surface heating element 3 is formed from a magnetic material, the housing 2 can be formed from a non-metallic or nonelectrically conductive or non-magnetic material such as, for example, a plastic.

Die Ausführung der Heizvorrichtung 1, wie sie in den Figuren 1 bis 3 dargestellt ist, ist lediglich beispielhaft. Von der Darstellung der Figuren 1 bis 3 und der zugehörigen Beschreibung geht keine beschränkende Wirkung aus. In den Figuren 1 bis 3 ist insbesondere eine Ausführung dargestellt, welche durch eine Anordnung von mehreren hohlzylindrischen Körpern zueinander Kanäle ausbildet, welche von einem Fluid durchströmt werden können. Das erfindungsgemäße Prinzip der Heizvorrichtung 1 kann ebenso auf anders ausgeformte Elemente einer Heizvorrichtung übertragen werden.The execution of the heater 1, as in the FIGS. 1 to 3 is shown, is merely exemplary. From the representation of FIGS. 1 to 3 and the associated description is not restrictive. In the FIGS. 1 to 3 In particular, an embodiment is shown, which forms channels to each other through an arrangement of a plurality of hollow cylindrical bodies, which can be flowed through by a fluid. The inventive principle of the heating device 1 can also be transferred to differently shaped elements of a heating device.

Insbesondere hinsichtlich der Materialwahl, der Abmessung und der Orientierung der einzelnen Elemente zueinander stellen die Figuren 1 bis 3 lediglich eine beispielhafte Ausführung dar und haben keinen beschränkenden Charakter. Die einzelnen Merkmale der Ausführungsbeispiele können untereinander kombiniert werden.In particular with regard to the choice of material, the dimension and the orientation of the individual elements to each other provide the FIGS. 1 to 3 merely an exemplary embodiment and have no limiting character. The individual features of the embodiments can be combined with each other.

Claims (7)

  1. A heating device (1) having a housing (2) with, arranged therein, a fluid passage having a fluid inlet (12, 13) and a fluid outlet (12, 13), wherein an element (30) generating an alternating magnetic field is provided in the housing (2), which element is separated in a sealed manner from the fluid passage by at least one wall, wherein furthermore there is provided at least one metallic areal heating element (3, 8, 22) which can be heated by means of the alternating magnetic field, wherein the at least one areal heating element (3, 8, 22) is arranged in the fluid passage, characterised in that at least one of the areal heating elements (3, 8) is made of a magnetic material, wherein the element (30) generating the alternating magnetic field is enclosed, toward the housing (2), essentially by a first element (3) made of a magnetic material and the element (30) generating the alternating magnetic field is enclosed, toward the centre of the housing (2), essentially by a second element (8) made of a magnetic material, wherein one or more areal heating elements (22), which can be heated up by means of the alternating magnetic field, are arranged between the first element (3) made of a magnetic material and the second element (8) made of a magnetic material.
  2. The heating device (1) as claimed in claim 1, characterised in that the housing (2) is made of an electrically nonconductive material.
  3. The heating device (1) as claimed in claim 1 or 2, characterised in that the first element (3) made of a magnetic material and/or the second element (8) made of a magnetic material each form an areal heating element (3, 8, 22).
  4. The heating device (1) as claimed in one of the preceding claims, characterised in that at least one of the areal heating elements (3, 8, 22) has one or more openings through which a fluid can be made to flow.
  5. The heating device (1) as claimed in claim 4, characterised in that, through the one or more openings in the respective areal heating element (3, 8, 22), a maximum material quantity of 0% to 50%, preferably of 10% to 40%, in this case preferably of 20% to 30% of the material quantity of starting material of the respective areal heating element (3, 8, 22) is removed.
  6. The heating device (1) as claimed in one of the preceding claims, characterised in that the element generating the alternating magnetic field is formed by a coil (30) which can be connected to an alternating current source.
  7. The heating device (1) as claimed in one of the preceding claims, characterised in that the quantity of heat which results in the element (30) generating the alternating magnetic field, and/or the quantity of heat which results in a control unit controlling and/or adjusting the element (30) generating the alternating magnetic field, can be used to heat the fluid.
EP14730934.8A 2013-06-19 2014-06-18 Heating device Active EP3011802B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013211563.6A DE102013211563A1 (en) 2013-06-19 2013-06-19 heater
PCT/EP2014/062854 WO2014202683A1 (en) 2013-06-19 2014-06-18 Heating device

Publications (2)

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EP3011802A1 EP3011802A1 (en) 2016-04-27
EP3011802B1 true EP3011802B1 (en) 2017-12-20

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US (1) US20160150598A1 (en)
EP (1) EP3011802B1 (en)
JP (1) JP6388930B2 (en)
KR (1) KR102135080B1 (en)
CN (1) CN105284185B (en)
DE (1) DE102013211563A1 (en)
ES (1) ES2662043T3 (en)
WO (1) WO2014202683A1 (en)

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KR20190054343A (en) * 2017-11-13 2019-05-22 한온시스템 주식회사 Induction Heater for a Motor Vehicle

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Publication number Publication date
JP6388930B2 (en) 2018-09-12
DE102013211563A1 (en) 2014-12-24
EP3011802A1 (en) 2016-04-27
WO2014202683A1 (en) 2014-12-24
KR20160021810A (en) 2016-02-26
CN105284185B (en) 2017-10-31
KR102135080B1 (en) 2020-07-20
CN105284185A (en) 2016-01-27
ES2662043T3 (en) 2018-04-05
US20160150598A1 (en) 2016-05-26
JP2016525261A (en) 2016-08-22

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