EP4337897A1 - Dispositif de chauffage et procédé de fabrication d'un dispositif de chauffage - Google Patents

Dispositif de chauffage et procédé de fabrication d'un dispositif de chauffage

Info

Publication number
EP4337897A1
EP4337897A1 EP22728876.8A EP22728876A EP4337897A1 EP 4337897 A1 EP4337897 A1 EP 4337897A1 EP 22728876 A EP22728876 A EP 22728876A EP 4337897 A1 EP4337897 A1 EP 4337897A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
exchanger body
heating element
power supply
heating device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP22728876.8A
Other languages
German (de)
English (en)
Other versions
EP4337897B1 (fr
Inventor
Susanne LUZ
Ulrich Lerche
Elmar Mangold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stego Holding GmbH
Original Assignee
Stego Holding GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stego Holding GmbH filed Critical Stego Holding GmbH
Publication of EP4337897A1 publication Critical patent/EP4337897A1/fr
Application granted granted Critical
Publication of EP4337897B1 publication Critical patent/EP4337897B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1863—Arrangement or mounting of electric heating means
    • F24H9/1872—PTC resistor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/002—Air heaters using electric energy supply
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/44—Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material
    • 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
    • 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
    • H05B2203/022—Heaters specially adapted for heating gaseous material
    • H05B2203/023—Heaters of the type used for electrically heating the air blown in a vehicle compartment by the vehicle heating system

Definitions

  • the invention relates to a heating device and a method for producing a heating device.
  • a heating device according to the preamble of patent claim 1 is known from DE 10 2006 018 150, for example.
  • control cabinets or in small housings including, for example, camera housings or the housings of valve devices
  • temperature changes cause condensation to form, which together with dust and aggressive gases can cause corrosion. This increases the risk of operational failures due to leakage currents or flashovers.
  • heaters or fan heaters in particular PTC semiconductor heaters, are used, and high demands are placed on their reliability and longevity.
  • Such heaters are usually switched equipped with electric heating elements.
  • the mounting of these heating elements should on the one hand enable good heat transfer and on the other hand a constant, secure fixation.
  • the frequent and, depending on the operating conditions, large temperature changes can lead to material fatigue due to aging and thus to a reduction in the holding force with which the heating elements are fixed. This worsens the heat transfer. If there is no hold function at all, the device may even fail completely.
  • heating elements are arranged in a heat exchanger body.
  • the heat exchanger body is plastically deformed in such a way that the heating elements are held therein.
  • the heat exchanger body encloses the receiving cavity for the heating elements. 2
  • the invention is based on the object of specifying a heating device in which an improved structural design increases heating capacity and operational reliability and simplifies production. Furthermore, the invention is based on the object of specifying a method for producing a heating device.
  • this object is achieved with regard to the heating device by the subject matter of claim 1.
  • the above-mentioned object is achieved by the subject matter of claim 12.
  • a heating device with at least one heating element, in particular at least one PTC element, at least two power supply devices and a heat exchanger body.
  • the heat exchanger body has an outer surface for dissipating heat to an environment and a receiving cavity for receiving the heating element.
  • the heating element is arranged in the accommodating cavity and is thermally conductively connected to the heat exchanger body.
  • at least one spring element is provided, which is supported on at least one support area of the heat exchanger body and applies a clamping force in the direction of the heating element in such a way that the heating element is pressed against the power supply devices and a base, in particular a cooling body, of the heat exchanger body.
  • the invention has various advantages.
  • the clamping force of the spring element reliably presses the heating element against the power supply lines and the base of the heat exchanger body, even in the event of material fatigue in the heat exchanger body, particularly in the area of the support area.
  • the spring element is supported on the support area. In other words, the spring element bears against the support area for support.
  • the spring element is therefore an element that is separate from the heat exchanger body. In other words, the spring element is structurally separate from the heat exchanger body.
  • the support area forms an abutment for the spring element in order to apply the clamping force to the heating element or the power supply devices. These are pressed against the base of the heat exchanger body by the tension of the spring element.
  • the clamping force of the spring element thus acts in the opposite direction to the support area of the heat exchanger body towards the heating element.
  • the heating element is against the by the spring element 3
  • Power supply devices and the base of the heat exchanger body elastically, in particular resiliently, pressed.
  • the operational safety of the heating device according to the invention is increased, since the spring element compensates for tolerances that occur, for example, due to material fatigue and thus prevents loosening of the contact between the heating element and the power supply devices even in the event of increased signs of fatigue. This significantly reduces the risk of the heating device failing.
  • material fatigue of the heat exchanger body can occur due to frequent and/or large temperature changes and thus lead to a reduction in the contact pressure with which the heating element is fixed. This is prevented in the case of the heating device according to the invention by the clamping force of the spring element.
  • the invention has the further advantage that the clamping force in the direction of the heating element and thus the contact pressure between the heating element and the power supply devices and the base of the heat exchanger body can be adjusted as required by appropriate design of the spring element.
  • the use of the spring element enables different configurations of the heating device.
  • the heating device is therefore versatile.
  • the heating element Due to the spring element, the heating element is in contact with the power supply devices with a constant contact pressure over the service life of the heating device, or the heating element is pressed with a constant contact force against the base of the heat exchanger body. As a result, the heating device has a constant heating output, as a result of which the temperature around the heating device can be controlled uniformly and in a controlled manner.
  • the heating element is preferably a PTC element.
  • PTC stands for "Positive Temperature Coefficient” and means that the heating element in this version has a positive temperature coefficient.
  • the PTC element can be described as a temperature-dependent resistance element.
  • the heating element is preferably indirect towards the base of the heat exchanger body through at least one of the power supply means 4 pressed.
  • at least one of the power supply devices is preferably arranged between the heating element and the base of the heat exchanger body. There is thus no direct contact between the heating element and the base of the heat exchanger body.
  • the base preferably forms a heat sink for temperature regulation of the heat exchanger body.
  • the spring element is preferably arranged in and/or on the heat exchanger body, in particular in the direction of the heating element, in a prestressed manner.
  • the spring element is preferably indirectly connected to the heating element, that is to say indirectly.
  • at least one of the power supply devices can be arranged at least partially between the spring element and the heating element.
  • the support area can have at least one contact surface for the spring element.
  • the support area is preferably a longitudinal leg of the heat exchanger body, which extends in the longitudinal direction of the heating device.
  • the support area can be designed as a lug.
  • the heating device thus has a longitudinal extension, the longitudinal direction of which runs parallel thereto.
  • the spring element preferably rests against the support area at least in sections.
  • the spring element can have a lateral, in particular elongate, contact section.
  • the spring element can be in line contact and/or point contact and/or surface contact with the support area for support.
  • the heating element is arranged between the two power supply devices to form a sandwich package.
  • the heating element and the power supply means are laminated to each other with the heating element interposed therebetween.
  • the heating element is preferably designed in the form of a plate.
  • the power supply devices preferably have at least one plate-shaped section that is in contact with the heating element.
  • the spring element rests on an inside of the support area facing the receiving cavity and braces the heating element and/or the power supply devices against the base, in particular the heat sink, of the heat exchanger body.
  • the heating element or the sandwich package is held securely in the receiving cavity of the heat exchanger body.
  • the spring element preferably braces the heating element and the power supply devices against the base of the heat exchanger body.
  • the spring element braces the sandwich package against the base of the heat exchanger body.
  • the clamping force of the spring element thus acts indirectly on the base of the heat exchanger body.
  • the inside of the support area faces the heating element, so that the spring element applies the clamping force in the direction of the heating element.
  • the inside of the support area also faces the base of the heat exchanger body.
  • the base of the heat exchanger body delimits the receiving cavity at the bottom. More preferably, the base has at least one mounting area for attaching the heating device to a counterpart, in particular an external holder device.
  • the heat exchanger body preferably has two side walls for laterally delimiting the receiving cavity and the base for delimiting the receiving cavity at the bottom.
  • the heat exchanger body is preferably designed to be open to the outside for receiving the spring element.
  • the support area is formed by a tab which extends from at least one side wall of the heat exchanger body towards the center of the heat exchanger body and runs along a longitudinal direction of the side wall.
  • the tab forms the abutment for the spring element.
  • the tabs form bilateral 6
  • the tabs are particularly preferably bending tabs.
  • the tabs are directed towards the center of the heat exchanger body during production by bending, in particular by means of "caulk technology".
  • the tab can extend in the longitudinal direction of the heating device at least in sections.
  • the tab can be designed to be continuous. Alternatively, the tab can be interrupted in sections be trained.
  • the heating element is in contact with the power supply devices through at least one contact surface.
  • the heating element and/or the power supply devices can each have at least one contact surface on which the heating element is in pressure contact with the power supply devices due to the tension force of the spring element.
  • the spring element preferably acts on the heating element and/or at least one of the power supply devices with the clamping force transversely to the contact surface. In other words, the line of action of the tensioning force runs normal to the at least one contact surface of the heating element and/or the power supply devices.
  • the spring element particularly preferably applies the clamping force to the heating element and both power supply devices transversely to the contact surface. In this case, the clamping force is introduced into the heating element or the power supply devices as efficiently as possible, so that an increased heating output results.
  • the heat exchanger body preferably has two side walls arranged opposite one another, on each of which the support area for the spring element is formed.
  • the heat exchanger body has two support areas arranged opposite one another, against which the spring element is supported.
  • the side walls delimit the receiving cavity laterally.
  • the spring element is in contact with two support areas of the heat exchanger body. This achieves a stable support contact between the spring element and the heat exchanger body and the support force of the spring element, which corresponds to the clamping force, is distributed over two support points. 7
  • At least one pressing part is arranged between the spring element and one of the power supply devices.
  • the pressing part preferably transmits the clamping force from the spring element to the heating element and/or to at least one of the power supply devices, in particular to the sandwich package.
  • the pressing part serves as a force transmission element in order to transmit the clamping force gently and evenly distributed, in particular over a large area, to the adjacent power supply device. This increases the service life of the heating device.
  • the pressing part is preferably designed in the form of a plate.
  • the pressing part preferably has a concave shape in a region facing the spring element, on which the spring element bears. As a result, the pressing part absorbs the spring force or the clamping force of the spring element in an improved manner.
  • the pressing part can be designed as a solid material. Alternatively, the pressing part can be designed as a structural part with spacers.
  • the pressing part is preferably made of aluminum.
  • the spring element is arcuate in cross section.
  • the spring element preferably has an apex area which faces the felt element for transmitting the tensioning force. Due to the arched shape of the spring element, the clamping force is transmitted in a particularly targeted manner via the apex area to the adjacent element, in particular the pressing part. Furthermore, this allows the spring element to be prestressed against the adjacent element in a simple manner, namely by bending the tabs inwards, i.e. towards the center, after the spring element has been inserted into the receiving cavity. As a result, the spring element is elastically deformed.
  • the spring element is preferably a leaf spring. Additionally or alternatively, the respective power supply device includes an electrode.
  • the electrode can be an aluminum electrode. Additionally or alternatively, the heat exchanger body can be made of aluminum. The advantage here is that the components are inexpensive to install and thus reduce the overall costs of the heating device.
  • the receiving cavity is closed at the end by at least one cover, in particular made of plastic.
  • the cover preferably engages at least in sections in an inner contour 8 of the heat exchanger body in a form-fitting manner. Both end faces of the receiving cavity are preferably closed by a cover in a form-fitting manner, in particular in a self-clamping manner.
  • the inner contour of the heat exchanger body can have a number of round recesses into which the cover engages.
  • the cover preferably has polygonal extensions which are in line or point contact with the respective recess. It is advantageous here that additional fastening means, such as screws, clamping devices, etc., can be omitted.
  • the polygonal extensions of the cover which are fitted into the round recesses, form a stable and solid one-off connection of the cover to the heat exchanger body. During the connection, the polygonal extensions of the cover are pressed into the round recesses, resulting in a press connection. There are increased coefficients of friction between the polygonal extensions and the round recesses. Furthermore, any existing tolerances are compensated for.
  • At least one insulating device is preferably arranged between the heat exchanger body and the sandwich package.
  • the sandwich package is preferably at least partially, in particular completely, encased with an insulating film.
  • the invention relates to a method for producing a heating device, in particular according to a heating device according to the invention, in which
  • At least one heating element, at least two power supply devices and a heat exchanger body are provided with a receiving cavity;
  • the heating element is arranged between the two power supply devices to form a sandwich package which is then covered with an insulating film;
  • the sandwich package is introduced into the receiving cavity in such a way that the heating element is thermally conductively connected to the heat exchanger body;
  • At least one spring element in particular a leaf spring, is inserted into the receiving cavity
  • At least one support area of the heat exchanger for prestressing the spring element is plastically deformed, in particular bent over, in such a way that the spring element applies a clamping force in the direction of the heating element and the heating element against the two power supply devices 9 and a base, in particular a heat sink, of the heat exchanger body.
  • the clamping force of the spring element can advantageously be adjusted.
  • the clamping force of the spring element depends on the degree of plastic deformation, in particular the bending angle of the support area after bending.
  • the plastic deformation has the advantage that tolerance compensation between the spring element and the heat exchanger body and a pressing part is made possible.
  • an assembly free of interfering edges and an increased curvature of the spring element are made possible, which results in improved tension of the spring element and thus increased heat output.
  • the method for producing a heating device can alternatively or additionally have individual features or a combination of several features mentioned above in relation to the heating device.
  • FIG. 1 shows a perspective view of a heating device according to a preferred embodiment of the invention
  • FIG. 2 shows a cross section through the heating device according to FIG. 1;
  • FIG. 3 shows a longitudinal section through the heating device according to FIG.
  • the heating device 10 has a heating element 11 , two power supply devices 12 and a heat exchanger body 13 . Furthermore, a spring element 16 is provided, which applies a clamping force in the direction of the heating element 11 and thus ensures a press contact between the heating element 11 and the two power supply devices 12 .
  • the spring element 16 will be discussed in more detail later.
  • the heat exchanger body 13 includes an outer surface 14 with longitudinal ribs and a receiving cavity 15.
  • the outer surface 14 serves to emit heat to the environment.
  • the heat exchanger body 13 is thermally conductively connected to the heating element 11 for heat transfer.
  • the accommodating cavity 15 accommodates the heating element 11 .
  • the power supply devices 12 are partially arranged in the receiving cavity 15 . This can be clearly seen in FIGS. 2 and 3. The power supply devices 12 will be discussed in more detail later.
  • the heat exchanger body 13 has a base 22 and two side walls 23 arranged opposite one another.
  • the side walls 23 protrude from the base 22 .
  • the side walls 23 delimit the receiving cavity 15 laterally and the base 22 delimits the receiving cavity 15 at the bottom. Together, the side walls 23 and the base 22 form a U-shaped profile.
  • the receiving cavity 15 is thus limited on three sides.
  • the receiving cavity 15 is open to the outside on a side 34 of the heat exchanger body 13 opposite the base 22 .
  • the side walls 23 each have a free end 35 .
  • the free ends 35 of the side walls 23 are on the opposite side 34.
  • the heat exchanger body 13 is an extruded profile.
  • the side walls 23 and the base 22 are integrally formed with each other.
  • the heat exchanger body 13 is elongate. In other words, the heat exchanger body 13 has a longitudinal extent.
  • the heat exchanger body 13 has a longitudinal axis L, which runs centrally between the two side walls 23 in the longitudinal direction of the heat exchanger body 13 . 11
  • the heating element 11 and the power supply devices 12 are arranged in the accommodating cavity 15.
  • the power supply devices 12 each have an electrode 27 .
  • the electrodes 27 comprise aluminum. Other electrode materials are possible.
  • the electrodes 27 are plate-shaped.
  • the power supply devices 12 each include an electrical line 32 which is connected to the associated electrode 27 .
  • the electrodes 27 each have a longitudinal side on which a U-shaped recess is formed.
  • the recess preferably serves to accommodate and connect terminals of the electrical lines 32.
  • the recesses of the two electrodes 27 are offset from one another transversely to the longitudinal direction of the electrodes 27.
  • the electrodes 27 are rotated relative to one another, i.e. folded over, in particular because of the routing of the lines 32 and any accumulations of material.
  • the electrodes 27 are contacted on the face side in order to realize the flatness of the electrodes 27, in particular plate-shaped electrodes 27.
  • the heat output is increased by the planar shape of the electrodes 27 .
  • the connection of the lines 32 to the electrodes 27 is not shown in FIGS.
  • the heating element 11 according to FIGS. 1 to 3 is a PTC element.
  • the heating element 11 has a positive temperature coefficient.
  • the heating element 11 is referred to as a PTC element 11 below.
  • the PTC element 11 is arranged between the two electrodes 27 .
  • the PTC element 11 is plate-shaped.
  • the outer dimensions of the PTC element 11 on the narrow sides are smaller than the electrodes 27 .
  • the PTC element 11 has an outer contour that is circumferentially offset from an outer contour of the electrodes 27 inwards, in particular towards its own center.
  • the electrodes 27 form a sandwich package 19 with the PTC element 11 arranged between them. This considerably simplifies the production and assembly of the heating device 10 .
  • the sandwich package 19 is arranged lying in the receiving cavity 15 .
  • the PTC element 11 and the electrodes 27 are each elongate.
  • the PTC element 11 and the electrodes 27 extend in the longitudinal direction of the heat exchanger body 13. 12
  • the heating device 10 includes the aforementioned spring element 16.
  • the spring element 16 is a leaf spring 26.
  • the leaf spring 26 is a separate spring element. In other words, the leaf spring 26 is structurally separate from the heat exchanger body 13 .
  • the leaf spring 26 is arcuate in cross section. In other words, the leaf spring 26 is shell-shaped. Concretely, the leaf spring 26 has a convex shape toward the heating element 11 .
  • the leaf spring 26 includes an apex area 33 which forms a clamping force transmission section in the direction of the heating element 11 .
  • the leaf spring 26 includes two lateral contact sections 36 with which the leaf spring 26 is supported against support areas 17 of the heat exchanger body 13 . The support areas 17 will be discussed in more detail later.
  • the side contact portions 36 are side ends of the leaf spring 26 opposed to each other.
  • the lateral contact sections 36 in particular the lateral ends, extend in the longitudinal direction of the heat exchanger body 13.
  • the leaf spring 26 is elongate.
  • the leaf spring 26 extends in the longitudinal direction of the heat exchanger body 13. In other words, the leaf spring 26 runs parallel to the side walls 23.
  • the leaf spring 26 is arranged in the receiving cavity 15. Specifically, the leaf spring 26 is arranged on the side 34 opposite the base 22 .
  • the leaf spring 26 spans the receiving cavity 15 in the longitudinal direction of the heat exchanger body 13.
  • the heat exchanger body 13 has the support areas 17 on the side walls 23 for the lateral contact sections 36 of the leaf spring 26 to rest against.
  • the support areas 17 are formed by lugs 24 which are bent inwards on the side walls 23 transversely to the longitudinal direction. In other words, the tabs 24 are folded over by bending.
  • the tabs 24 can also be referred to as flexible tabs.
  • the tabs 24 are part of the side walls 23.
  • the tabs 24 each have an inner side 21 which faces the base 22.
  • FIG. The leaf spring 26 rests on this inner side 21 with the lateral contact sections 36 for support.
  • the clamping force of the leaf spring 26 can be adjusted by bending the tabs 24 .
  • the clamping force of the leaf spring 26 is dependent on the bending angle of the tabs 24 at which the tabs 24 are bent inwards.
  • the tabs 24 have the advantage that a tolerance compensation between the leaf spring 26 and the 13
  • Heat exchanger body 13 and the pressing part 25 described later is made possible.
  • an assembly free of interfering edges and an increased curvature of the leaf spring 26 are made possible, resulting in an improved tension of the leaf spring 26 and thus an increased heat output.
  • a pressing part 25 is arranged between the leaf spring 26 and the sandwich package 19 .
  • the pressing part 25 absorbs the clamping force from the leaf spring 26 and transmits the clamping force that is absorbed to the adjacent electrode 27.
  • the pressing part 25 has a surface 37 which faces the spring element 16, in particular the leaf spring 26 and which is in contact with the apex region 33.
  • the surface 37 of the pressing part 25 has a partially curved shape for abutting the apex portion 33 of the leaf spring 26 .
  • the surface 37 of the pressing part 25 has a concave shape.
  • surface 37 is flat, that is, free of curvature.
  • the pressing part 25 has notches on the surface 37 .
  • the pressing part 25 is arranged in contact with an inner contour 31 of the heat exchanger body 13 or at a slight distance from it. In concrete terms, the pressing part 25 can bear against the opposite side walls 23 . This achieves a positionally accurate arrangement of the pressing part 25 in the receiving cavity 15 .
  • the pressing part 25 is movably arranged in the clamping force direction. Furthermore, the pressing part 25 has a bevel on the longitudinal edges.
  • the pressing part 25 is plate-shaped.
  • the pressing part 25 consists of a solid material. Specifically, the pressing part 25 is made of aluminum.
  • the sandwich package 19 is surrounded by an insulating device 28.
  • the insulating film is arranged between the base 22 and a first of the two electrodes 27 .
  • the first electrode 27 lies flat against the insulating film.
  • the PTC element 11 is arranged adjacent to the first electrode 27, a second of the two electrodes 27 in turn lying flatly adjacent thereto.
  • the pressing part 25 is then arranged, with the insulating film being located between the pressing part 25 and the second electrode 27 .
  • the pressing part 25 is on the opposite side 34 of the base 22 of the heat exchanger body 13 with the leaf spring 26, specifically with the apex area 33 of the leaf spring 26 in contact.
  • the leaf spring 26 and the pressing part 25 are in direct contact for power transmission.
  • the leaf spring 26 is supported with the lateral contact sections 36 against the two tabs 24 of the heat exchanger body 13 .
  • the leaf spring 26 rests against the inner sides 21 of the two tabs 24 in order to apply the clamping force in the opposite direction relative to the tabs 24 .
  • the tabs 24 partially protrude towards the center, in particular in the direction of the longitudinal axis L, beyond the lateral contact sections 36 of the leaf spring 26 .
  • the tabs 24 therefore each form an abutment for the lateral contact sections 36 of the leaf spring 26.
  • the leaf spring 26 is elastically deformed between the pressing part 25 and the tabs 24 for prestressing. Specifically, during the production of the heating device 10 , the leaf spring 26 is first pressed against the press-on part 25 and is thus pretensioned by the tabs 24 being folded over or bent over towards the leaf spring 26 .
  • the force flow of the clamping force takes place from the leaf spring 26 via the apex area 33 to the pressing part 25, from the pressing part 25 to the sandwich package 19 and then to the base 22 of the heat exchanger body 13.
  • the leaf spring 26 braces the sandwich package 19 via the pressing part 25 the base 22. This keeps the integrated components in the receiving cavity 15 stable and strong.
  • the insulating film is not mentioned here for the sake of simplicity.
  • the tension force of the leaf spring 26 presses the PTC element 11 and the electrodes 27 against one another.
  • the clamping force of the leaf spring 26 runs transversely to two contact surfaces 18 of the PTC element 11, via which the PTC element 11 with 15 adjacent contact surfaces 38 of the respective electrodes 27 is in press contact.
  • the electrodes 27 and the PTC element 11 are in direct contact.
  • the base 22 forms a heat sink. As shown in FIG. 1, the base 22 is formed in a plate shape. The base 22 protrudes outwards transversely to the longitudinal direction over one of the side walls 23 . This protruding part of the base 22 forms a mounting area 39 for fastening the heating device 10, for example to an external holding device.
  • the mounting area 39 has at least two through openings.
  • the heating device 10 has a total of two covers 29 which close the receiving cavity 15 at its end faces. On one of the covers 29, the electrical lines 32 of the power supply devices 12 are routed to the outside, in particular sealed.
  • the covers 29 serve to increase the suitability of the heating device 10 for different environmental conditions, for example damp and/or dusty environments.
  • the heating device 10 has increased IP protection as a result of the cover 29 mentioned.
  • the lids 29 each have extensions 41 that protrude from a transverse side of the lid 29 .
  • the extensions 41 each have a polygonal contour.
  • the extensions 41 form polygonal pins which engage in round recesses 42 in the inner contour 31 of the heat exchanger body 13 in order to fasten the cover 29 .
  • the edges of the extensions 41 are in linear contact with the surfaces of the recesses 42.
  • the covers 29 can be glued to the heat exchanger body 13 . It can also be seen in FIG. 3 that the sandwich package 19 is spaced apart from the two covers 29 in the longitudinal direction.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

L'invention concerne un dispositif de chauffage (10) comportant au moins un élément chauffant (11), en particulier au moins un élément à PTC, au moins deux dispositifs d'alimentation en courant (12) et un corps d'échangeur de chaleur (13), qui présente une surface extérieure (14) destinée à délivrer de la chaleur à un environnement et une cavité de réception (15) destinée à recevoir l'élément chauffant (11), l'élément chauffant (11) étant disposé dans la cavité de réception (15) et relié au corps d'échangeur de chaleur (13) de manière thermoconductrice, au moins un élément élastique (16) étant présent, qui s'appuie sur au moins une zone d'appui (17) du corps d'échangeur de chaleur (13) et exerce une force de serrage en direction de l'élément chauffant (11), de sorte que ledit élément chauffant (11) est comprimé contre les dispositifs d'alimentation en courant (12) et une base (22), en particulier un corps de refroidissement, du corps d'échangeur de chaleur.
EP22728876.8A 2021-05-14 2022-05-12 Dispositif de chauffage et procédé de fabrication d'un dispositif de chauffage Active EP4337897B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021112603.7A DE102021112603A1 (de) 2021-05-14 2021-05-14 Heizeinrichtung und Verfahren zur Herstellung einer Heizeinrichtung
PCT/EP2022/062946 WO2022238538A1 (fr) 2021-05-14 2022-05-12 Dispositif de chauffage et procédé de fabrication d'un dispositif de chauffage

Publications (2)

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EP4337897A1 true EP4337897A1 (fr) 2024-03-20
EP4337897B1 EP4337897B1 (fr) 2026-04-01

Family

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EP22728876.8A Active EP4337897B1 (fr) 2021-05-14 2022-05-12 Dispositif de chauffage et procédé de fabrication d'un dispositif de chauffage

Country Status (6)

Country Link
US (1) US20240255183A1 (fr)
EP (1) EP4337897B1 (fr)
CN (1) CN117545967A (fr)
AU (1) AU2022273993A1 (fr)
DE (1) DE102021112603A1 (fr)
WO (1) WO2022238538A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0333906A1 (fr) * 1988-03-25 1989-09-27 David & Baader DBK Spezialfabrik elektrischer Apparate und Heizwiderstände GmbH Résistance chauffante à coefficient de température positif
DE3942266C1 (de) * 1989-12-21 1991-03-07 Tuerk & Hillinger Gmbh PTC-Heizkoerper

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4698614A (en) 1986-04-04 1987-10-06 Emerson Electric Co. PTC thermal protector
DE3677603D1 (de) 1986-10-01 1991-03-28 David & Baader Dbk Spezfab Kaltleiter-ptc-heizkoerper.
JPH0734390B2 (ja) 1987-09-11 1995-04-12 株式会社村田製作所 正特性サーミスタ装置
DE502004005781D1 (de) * 2004-02-10 2008-02-07 Catem Gmbh & Co Kg Elektrische Heizvorrichtung für niedrige Bauhöhen
DE102006018150B4 (de) 2006-04-19 2008-01-24 Stego-Holding Gmbh Heizeinrichtung
ITRM20130440A1 (it) * 2013-07-26 2015-01-27 Bitron Spa Dispositivo di riscaldamento, in particolare per il riscaldamento dello abitacolo di una automobile, e metodo di montaggio di detto dispositivo.
DE102018206085B4 (de) * 2018-04-20 2021-09-23 Eberspächer Catem Gmbh & Co. Kg Elektrische Heizvorrichtung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0333906A1 (fr) * 1988-03-25 1989-09-27 David & Baader DBK Spezialfabrik elektrischer Apparate und Heizwiderstände GmbH Résistance chauffante à coefficient de température positif
DE3942266C1 (de) * 1989-12-21 1991-03-07 Tuerk & Hillinger Gmbh PTC-Heizkoerper

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2022238538A1 *

Also Published As

Publication number Publication date
CN117545967A (zh) 2024-02-09
DE102021112603A1 (de) 2022-11-17
EP4337897B1 (fr) 2026-04-01
WO2022238538A1 (fr) 2022-11-17
US20240255183A1 (en) 2024-08-01
AU2022273993A1 (en) 2023-11-23

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