EP2772116A1 - Corps de refroidissement et de retenue pour éléments chauffants, appareil de chauffage et procédé de fabrication d'un corps de refroidissement et de retenue - Google Patents

Corps de refroidissement et de retenue pour éléments chauffants, appareil de chauffage et procédé de fabrication d'un corps de refroidissement et de retenue

Info

Publication number
EP2772116A1
EP2772116A1 EP12787386.7A EP12787386A EP2772116A1 EP 2772116 A1 EP2772116 A1 EP 2772116A1 EP 12787386 A EP12787386 A EP 12787386A EP 2772116 A1 EP2772116 A1 EP 2772116A1
Authority
EP
European Patent Office
Prior art keywords
shaft
cooling
flat housing
holding body
heating
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
EP12787386.7A
Other languages
German (de)
English (en)
Other versions
EP2772116B1 (fr
Inventor
Robert Dent
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
Priority to PL12787386T priority Critical patent/PL2772116T3/pl
Publication of EP2772116A1 publication Critical patent/EP2772116A1/fr
Application granted granted Critical
Publication of EP2772116B1 publication Critical patent/EP2772116B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/02—Heaters using heating elements having a positive temperature coefficient
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part

Definitions

  • the invention relates to a cooling and holding body for heating elements, in particular PTC heating elements or flat heaters, a heater with such a cooling and holding body and a method for producing such a cooling and holding body.
  • Such heaters are usually equipped with electrical heating elements.
  • the holder of these heating elements should on the one hand allow a good heat transfer and on the other hand a constant secure fixation.
  • the frequent and depending on the operating conditions temperature changes can lead to fatigue due to aging and thus to a reduction in the holding force with which the heating elements are fixed. As a result, the heat transfer is deteriorated. If the hold function is completely eliminated, it can even lead to a total failure of the device.
  • the heating element is arranged in the centrally arranged recess of a heat exchanger, wherein the contact inner surfaces of the recess lie flat against the heating element.
  • the holding force is achieved in that after installation of the heating element sidewalls of the heat exchanger are bent inwardly, whereby the distance between the contact surfaces of the recess is reduced.
  • the arranged between the contact surfaces heating element is thereby clamped flat.
  • This attachment is a stable holder that provides a constant high holding force and thus a constant good heat transfer from the heating element to the heat exchanger without readjustment.
  • the buckling of the side walls leads to a plastic deformation of the wall material, which is not optimal due to the frequent temperature changes for the holding conditions.
  • the invention is therefore based on the object to improve a cooling and holding body of the type mentioned in such a way that a secure mounting of the heating element or the heating elements in the cooling and holding body is achieved despite frequent temperature changes.
  • the invention is further based on the object to provide a heater with such a cooling and holding body and a method for producing such a cooling and holding body.
  • this object is achieved by the holding and cooling body according to claim 1, the heater according to claim 15 and the method according to claim 16.
  • the invention is based on the idea to provide a cooling and holding body for heating elements, in particular electrical heating elements, in particular PTC heating elements or flat heaters, which has a flat housing with at least one heating shaft in which at least one heating element is arranged.
  • the heating shaft has opposite shaft walls, between which the heating element is clamped.
  • the heating shaft has at least one side slot which separates the shaft walls such that the distance between the shaft walls for mounting the heating element is variable.
  • On the flat housing engages at least one over the flat housing to the outside projecting clamping section.
  • the clamping portion spans the side slot and is elastically deformed in the mounted state of the heating element for generating a force acting on the heating element pressing force of the shaft walls.
  • the at least one clamping portion is elastically deformed. This means that the deformation takes place in the area of the Hooke's straight line and is proportional to the stress that is generated in the tensioning section.
  • the deformation below the elastic limit optimizes the clamping force with which the heating elements are clamped in the heating shaft. Settlements resulting from material aging are avoided in contrast to plastic deformation.
  • the clamping force with which the heating elements are fixed remains constant or at least substantially constant despite the temperature changes. Due to the constant high clamping force a constant maximum heat transfer from the heating elements is achieved on the material of the holding and cooling body.
  • the elastic deformation causes the force with which the heating elements are pressed to act as a spring force according to the respective material constant. A readjustment of the pressure or clamping force is not required.
  • the heating shaft has at least one side slot which separates the shaft walls in such a way that the distance between the shaft walls for mounting the heating element can be changed. This will cause the distance between the shaft walls to be increased to introduce the heating element (s) into the heater shaft. In the assembled state of the heating elements or the distance between the shaft walls is reduced, so that these rest on the heating element for heat transfer and fix the heating element in the heating shaft.
  • the contact force is due to the outside generated on the flat housing projecting clamping portions or a single outwardly beyond the flat housing protruding clamping portion which engages the flat housing and spans the side slot.
  • the one or more clamping portions are elastically deformed and act as springs or similar to leaf springs, which produce in the region of the shaft walls acting on the heating elements contact forces. The contact forces act in opposite directions inwards.
  • the excess between the heating element and the heating shaft is set so that the clamping sections or the clamping section elastically deform due to the slightly spaced apart side slot or the slightly spaced apart side slots.
  • the heating elements are thus arranged between the shaft walls in the mounted state in a press fit.
  • the expert makes a setting of a suitable oversize as a function of the respective material properties of the flat housing in such a way that adjusts the elastic deformation of the clamping sections in the assembled state.
  • clamping sections can be used for easy installation of the heating elements. By acting on the clamping sections with a relative to the flat housing inwardly acting mounting force increase the clamping sections their radius and open the side slot, which thus acts as a mounting slot.
  • the housing parts connected to the clamping sections are deflected outwards. This results in a slight increase in the distance between the shaft walls, which is sufficient to bring or insert the heating element or elements with an insulating film in the heating shaft.
  • the mounting force is released and the clamping sections try to return to their stress-free state. Since the clamping sections are thereby blocked by the heating elements or the heating element, they produce at the shaft walls the desired holding or pressing force in an elastic range dependent on the respective material constant.
  • the deformation of the clamping sections for assembly takes place in the region of Ke'schen straights, ie below the elastic limit.
  • the mechanical expansion can be supplemented or replaced by a thermal expansion (shrinking).
  • the over the flat housing projecting outward clamping portion may be formed as a convexly curved clamping portion.
  • the convex curvature of the clamping section means that it bulges outwardly with respect to the outer walls of the flat housing or protrudes outward curved over the straight walls of the flat housing.
  • the over the flat housing projecting outward clamping portion straight legs, in particular two straight legs, which are interconnected at an angle.
  • the legs together with the outer wall of the flat housing form a triangular cross-sectional profile.
  • the distance between the apex of the curved clamping section or between the tip of the triangular clamping section, that is generally the maximum distance between clamping section and flat housing, is dimensioned so that a sufficient spring travel is available for the assembly.
  • At least one shaft wall and an outer wall of the flat housing extending parallel to the shaft wall are connected by at least one transverse web.
  • the transverse webs act as cooling ribs, which increase the heat transfer of the surface of the cooling and holding body.
  • the length of the clamping portion is increased transversely to the longitudinal extent of the side slit.
  • the angle between the clamping portion and flat housing in the region of the point of attack is an acute angle and adjusted so that a force acting perpendicular to the side slot mounting force or acting in the opposite direction pressing force can be generated.
  • the attack points can attack on the outer edges of the flat housing. This results in the maximum distance of the attack points from the side slot. It is also possible that the points of attack of the clamping section further inside, ie closer to the side slit, d .h. are arranged between the outer edge of the flat housing and the side slot.
  • This embodiment has the further advantage that a relatively large radius of the convexly curved clamping portion and thus a small distance of the clamping portion of the housing side can be adjusted.
  • the cooling and holding body can be made compact.
  • the widening of the heating shaft is generally determined by the radius of the tensioning section or the chord radius, the spacing of the chordal connections or the points of application, the material thickness, the material and also the shape of the tensioning section (for example triangular or curved).
  • the mechanical properties are determined by means of angle attack, fixed bearing and contact pressure.
  • the side slot and the points of attack of the clamping portion are each provided perpendicular to the heating shaft side walls of the flat housing, which are connected to the clamping portion at the points of attack.
  • the transition from the side walls to the clamping portion has on the inside in each case a rounding or a radius.
  • the notch effect and thus the plastic deformation is reduced or completely prevented by the rounding in the region of the transition from the side walls to the clamping section.
  • the cooling and holding body can be made particularly compact and simple, for example by pultrusion be made.
  • at least two parallel heating ducts can be provided, which are separated by a core arranged between the heating ducts.
  • Each heating shaft has at least one side slot.
  • This embodiment allows the stack-like arrangement of a plurality of heating elements in different planes, wherein the ease of installation and the constant contact pressure due to the elastic deformation of the clamping portions and the clamping portion are maintained.
  • a substantially square shape for mounting a fan with corresponding screw or clip fasteners is possible. Due to the length of the flat housing, the power output can be influenced.
  • the respective inner shaft walls may be formed by outer walls of the core, wherein the outer walls are in turn connected to each other by transverse webs.
  • the core thus forms a common boundary of the two Walkermchte by the outer walls of the core form the respective inner shaft walls.
  • the outer shaft walls of the two Walkermchte are formed by the flat housing and arranged in each case closer to the outer surface of the flat housing.
  • the connection of the outer walls of the core by transverse webs increases on the one hand the stability of the cooling and holding body, in particular of the core, and on the other hand, the area effective for the heat transfer surface.
  • the transverse webs thus act as cooling ribs.
  • each side slot is associated with a single clamping section.
  • a single clamping section may be associated with a plurality of side sections located on one and the same side of the flat housing. The assignment of a single clamping section to several side sections results in a simple construction of the cooling and holding body. If each side section is assigned a single clamping section, the installation of the heating elements in the individual heating ducts is simplified.
  • the thickness of the clamping sections or the chords between the points of attack, ie transversely to the longitudinal extension of the flat housing changes.
  • the clamping sections are thicker in the middle and become thinner towards the ends of the legs, ie towards the points of attack.
  • the core is fixedly connected to the flat housing, in particular fixedly connected by the clamping sections.
  • This embodiment is particularly suitable for the embodiment in which each side slot has its own clamping section.
  • the clamping sections have the dual function, on the one hand apply the contact pressure, on the other hand to fix the core in a certain position, in particular centrally in the cooling and holding body. Other arrangements of the core in the cooling and holding body are possible.
  • the core can be arranged freely in the flat housing. This means that the core is not directly, i. H. materially connected to the flat housing.
  • This embodiment is particularly suitable in combination with the single clamping portion associated with a plurality of side slots on one and the same side of the flat housing.
  • a first longitudinal edge of at least one shaft wall is connected to the flat housing.
  • a second longitudinal edge of the shaft wall is arranged opposite the first longitudinal edge, wherein the second longitudinal edge is freely movable such that the location of the shaft wall can be changed.
  • the shaft wall is coupled to the flat housing at a first longitudinal edge.
  • the second longitudinal edge which lies opposite the first longitudinal edge is free and can be moved relative to the flat housing in such a way that the spatial position of the shaft wall can be changed.
  • the movement of the shaft wall is initiated by a deformation of the flat housing over the first longitudinal edge.
  • a further increase in power can be achieved if, in the embodiment described above, the shaft wall is connected to a stiffening rib which acts on the shaft wall between the two longitudinal edges and is connected to the flat housing in the region of the first longitudinal edge. The movement is thereby not only in the area of the first longitudinal edge in the
  • a heater is disclosed with a cooling and holding body according to one of the aforementioned embodiments or with a cooling and holding body according to the invention, wherein at one axial end of the cooling and holding body, a fan is arranged such that the Cooling and holding body in the longitudinal direction with gas or air can flow and / or flow around.
  • a heater can be used for example for the air conditioning of a cabinet or for other applications.
  • the distance between the shaft walls for joining is increased, wherein the flat housing is heated and / or the distance between the shaft walls is increased by an assembly force extending transversely to the respective heating shaft on the clamping section or on the Clamping sections is applied, which causes the clamping sections and the clamping section is compressed.
  • the distance between the shaft walls is increased due to the side slot.
  • the heating elements or the heating element and the cooling and holding body can be joined by the heating element is pushed into the heating shaft.
  • the flat housing is cooled and / or relieved, so that the shaft walls are moved to their holding position and act on the heating elements or with a corresponding contact pressure.
  • FIG. 1 is a perspective view of a cooling and holding body according to an embodiment of the invention with a single central heating shaft;
  • FIG. 2 shows a perspective view of a cooling and holding body according to a further exemplary embodiment with two parallel heating shafts
  • FIG. 3 is a perspective view of another embodiment of a
  • FIG. 4 shows a plan view of a cooling and holding body according to another
  • FIG. 5 is a perspective view of another embodiment of a
  • FIG. 6 is a perspective view of another embodiment of a
  • FIG. 7 is a perspective view of another embodiment of a
  • Cooling and holding body in which the shaft walls are each provided with stiffening ribs.
  • a cooling and holding body for an electric heating element (not shown) according to an embodiment of the invention is shown in a perspective view, which can be installed in a heater, such as a heater.
  • the fan heater in turn can be used for example for the air conditioning of a control cabinet. Other applications of such a fan heater are conceivable.
  • both the cooling and holding body with the heating elements arranged therein, so as an independent assembly, as well as the entire heater with such a cooling and holding body is disclosed and claimed.
  • the cooling and holding body can be referred to as a heat sink or heat exchanger due to its function.
  • the heating elements are known per se PTC heating elements, ie PTC thermistors with a positive temperature coefficient.
  • the heating elements 10 have a flat cuboid shape. Other electrical heating elements are possible.
  • the cooling and holding body has a flat housing 11 with a single heating shaft 12 which is centrally, ie. is formed centrally in the flat housing.
  • the flat housing is elongated and has at least one, in particular at least two flat outer walls 16, which are flat, ie not curved, and parallel to each other.
  • the outer wall 16, in particular both outer walls 16 extend substantially over the entire width of the flat housing 11.
  • the two outer walls 16 and the heating shaft 12 are also parallel to each other. Perpendicular to the outer walls 16 straight side walls 19 are arranged.
  • the outer walls 16 and side walls 19 are perpendicular to each other.
  • the side walls 19 are associated with convexly curved clamping portions 15 which limit the outer contour of the flat housing, at least in the region of the sides.
  • the flat housing 11 has a substantially rectangular cross-section, wherein the sides of the flat housing are convexly outwardly projecting in particular outwardly curved.
  • the straight lines, perpendicular to the outer walls 16 arranged side walls 19 are located within the outwardly projecting sides.
  • clamping portions 15 The structure and function of the clamping portions 15 will be described in more detail elsewhere.
  • the arranged in the flat housing heater shaft 12 extends in the longitudinal direction of the flat housing 11 and has opposite parallel shaft walls 13a, 13b.
  • at least one heating element 10 in particular a plurality of heating elements arranged side by side in the transverse direction of the flat housing in the heating shaft 12, wherein the shaft walls 13a, 13b bear close to the or on the heating elements 10 for heat transfer.
  • the heating elements or the heating element 10 are fixed in the heating shaft 12 in the longitudinal and transverse directions of the flat housing 11.
  • the shaft walls 13 a, 13 b are each connected to the associated outer walls 16 by transverse webs 17.
  • the transverse webs 17 serve on the one hand for transmitting the contact pressure generated by the clamping portions 15 on the shaft walls 13a, 13b.
  • the transverse webs 17 act as cooling fins, in order to transfer the heat from the heating element to the shaft walls 13a, 13b Dissipate heat.
  • the transverse webs 17 extend parallel to the side walls 19 and extend in the longitudinal direction of the flat housing 11. In the example according to FIG. 1, two transverse webs 17 are provided per shaft wall 13a, 13b.
  • the transverse webs 17 subdivide the space between the respective shaft wall 13a, 13b and the associated outer wall into chambers, in the example according to FIG. 1 concretely into three chambers through which air or gas can flow in order to cool the heating element.
  • the chambers are open at both axial ends of the cooling and holding body.
  • Another number of transverse webs 17, for example a single transverse web 17 or more than two transverse webs 17 is possible.
  • the transverse webs 17 are arranged and constructed respectively on both sides of the heating shaft 12.
  • the holding shaft 12 has two side slots 14, which are provided in the transverse direction of the flat housing on both sides of the heating shaft 12.
  • the two lateral slots 14 separate the shaft walls 13a, 13b from one another such that the distance between the two shaft walls 13a, 13b can be changed at least during the assembly of the heating element 10.
  • the shaft walls 13a, 13b are mechanically decoupled. As a result, the shaft walls 13a, 13b can be moved away from one another, in particular by applying a suitable mounting force, in order to introduce the heating element 10 into the heating shaft 12. In the mounted state of the heating element 10, the two shaft walls 13a, 13b are moved toward the heating element such that they come into contact with the heating element 10 and apply this to improve the heat transfer and fixing with a contact force.
  • the previously mentioned clamping sections 15 are provided on both transverse sides of the flat housing 11.
  • the two Clamping portions 15 are associated with the side slits 14 and generate in the mounted state of the heating element oppositely directed contact forces acting on the shaft walls 13 a, 13 b and thus from both sides of the heating element 10.
  • the clamping portions 15 engage at two points on the flat housing 11 and span the side slot 14. It is understood that with only a single side slot 14 and only a single clamping portion 15 is required, which is assigned to this side portion.
  • the clamping portions 15 extend, as well as the respectively associated side slots 14 in the longitudinal direction of the flat housing.
  • the clamping portions 15 are curved transversely to the longitudinal extent.
  • the clamping portions 15 form in cross-section arcuate or circular segment-like, elongated components whose end points are connected to the flat housing 11 in the region of the engagement points 18.
  • In the region of the side slit 14 is the largest distance of the respective clamping portions 15 from the flat housing 11.
  • the resulting symmetrical configuration of the clamping portions 15 leads to a uniform force distribution.
  • An asymmetrical configuration of the clamping portions 15 is possible.
  • the convexly curved clamping sections 15 engage the outer edges of the flat housing and are therefore at a maximum distance from the respectively associated side slots 14.
  • clamping sections 15 can engage further on the flat housing, ie between the outer edges of the flat housing and the side slit 14 in the region of the side walls 19.
  • the arcuate shape of the clamping portions 15 can be made as a radius of variable thickness. This increases the stability and the risk of buckling is reduced.
  • This embodiment of the clamping portions 15 is disclosed as a design option in connection with all embodiments and is shown in Fig. 4.
  • the maximum thickness of the respective clamping section 15 is approximately equal to the side slit 14 and decreases on both sides towards the points of attack 18, where in each case the minimum thickness is present.
  • the arrangement of the two engagement points 18 each of a clamping element 15 on both sides of the side slit 14 means that the engagement points 18 are arranged above and below the side slit 14 and spaced from the side slit 14.
  • the side walls 19 of the flat housing 11 are, as stated, arranged vertically with respect to the heating shaft 12 and extend between the side slot 14 and the engagement points 18 and the end points of the respective clamping portion 15.
  • the side walls are 19th connected on its outer side with the end points of the clamping portions 15 in the region of the attack points 18.
  • the transition from the side walls 19 to the respective clamping portion 15 is formed with a rounding, in particular an ideal rounding, in order to keep the notch effect as minimal as possible.
  • the side walls 19 are extended beyond the inner surfaces of the shaft walls 13a, 13b and project beyond these or the inner edges 21 formed there, thereby forming guide lugs 20.
  • the guide lugs 20 bound the side slots 14.
  • the guide lugs 20 form lateral stops for the in the heating shaft 12 arranged heating element, whereby the assembly of the heating element facilitates and a mechanical barrier against lateral slippage is formed.
  • the cooling and holding body according to FIG. 1 has a single centrally arranged heating shaft 12.
  • the invention is not limited to such cooling and holding body, but also includes cooling and holding body with multiple heater wells, as exemplified by the embodiments of FIG. 2, 3 is shown.
  • FIG. 1 and FIG. 2 agree insofar as in both embodiments, a flat housing 11 is provided which has straight outer walls 16. Laterally, the flat housing 11 is bounded by side walls 19 which extend perpendicular to the outer walls 16. The side walls 19 are in the embodiment of FIG. 2 as well as in the embodiment of FIG. 1 disposed within the convexly curved clamping portions 15 which engage over the side walls 19 on the outside of the flat housing 11.
  • the flat housing according to FIG. 2 is constructed on the outside of the outer shaft walls 13a, ie in the space between the outer shaft walls 13a and the respectively associated outer wall 16 similar to the embodiment of FIG. 1 and has transverse webs 17 which connect the outer shaft walls 13a with the associated outer walls 16 ,
  • transverse webs 17 For the function and arrangement of the transverse webs 17 reference is made to the embodiments of FIG. 1.
  • the two outer walls 16 are each offset inwards.
  • the outer wall 16 forms a shoulder which runs parallel to the offset region of the respective outer wall 16 and forms the outer edge of the flat housing 11.
  • the shoulder goes over into the clamping sections 15.
  • a core 22 is provided, which is arranged between the two outer shaft walls 13a and the flat housing 11 divided into two parallel superimposed heating ducts 12.
  • the core 22 has a rectangular cross section whose width corresponds to the width of the outer shaft walls 13a. The perpendicular to the inner
  • Shaft walls 13b extending side walls 19a of the core 22 are aligned with the side walls 19, which are connected to the outer shaft walls 13a.
  • the sidewalls 19 connected to the outer shaft walls 13a and the side walls 19a of the core 22 form the (inner) straight sidewalls of the flat housing, which are bridged by the curved clamping sections 15.
  • the two heating ducts 12 are in principle constructed in the same way as the central heating duct 12 according to FIG. 1 and function accordingly.
  • the two heating Shaft 12 according to FIG. 2 each have two side slots 14 which decouple the core 22 and the inner shaft walls 13b from the outer shaft walls 13a. For a change in distance or broadening of the heating shaft is possible.
  • the side slits 14 reference is made to the statements for example in FIG. 1.
  • each heating shaft 12 is assigned clamping sections 15 on both sides. Overall, therefore, four clamping sections 15 are provided, two on each side of the flat housing 11. The function of the clamping sections corresponds to the function of the clamping sections of FIG. 1.
  • the engagement points 18 of the respective clamping sections 15 are located on the one hand in the region of the outer edge of the flat housing 11.
  • the clamping portions 15 are connected on the one hand to the outer edge of the flat housing or generally with the flat housing 11 and on the other hand to the core 22, in particular cohesively connected or formed in one piece.
  • the clamping portions 15 engage in the center of the core 22 on the side surfaces 19 a.
  • the transition between the side surface 19, 19 a of the flat housing 11 and the core 22 to the respective clamping portions 15 is carried out in each case with a rounding.
  • the Schujchte 12 each have guide lugs 20, which are formed as in the embodiment of FIG.
  • the number of Schuster according to FIG. 2 is to be understood as an example. It is also possible to provide more than two heating ducts with a corresponding number of cores and associated clamping sections, which are constructed on the same principle, as shown in Fig. 2. For a multiple stacking of heating elements in the height direction of the cooling and holding body and a corresponding increase in heating capacity is possible.
  • the core 22 has transverse webs 24 which connect the outer walls 23 and the two inner shaft walls 13b and extend in the longitudinal direction of the core.
  • the transverse webs 24 increase the strength of the core 22.
  • the transverse webs 24 serve as cooling ribs in order to separate the heating elements from the heating element inner duct walls 13b dissipate transferred heat through an enlarged surface.
  • two transverse webs 24 are provided, which run parallel to the side walls 19 a. Another number, for example, only a single crossbar or more than two transverse webs are possible.
  • the two heating elements 10 are shown in the mounted state, wherein these are arranged in a press fit in the heating shaft 12. Thereby, the above-described elastic deformation of the four or the plurality of clamping portions 15 is achieved and the associated contact pressure achieved.
  • the heating elements are PTC heating elements, of which the ceramic base 10a can be seen in FIG. 2 as well as the connecting wires 10b. Other electrical heating elements can be used.
  • the heating elements 10 are electrically insulated from the heating shaft 12 by suitable insulating materials. This applies to all embodiments of this application.
  • the difference between the embodiments according to FIG. 2, 3 consists in the arrangement of the core 22 and the formation of the clamping portions 15.
  • the core 22 according to FIG. 3 is a so-called flying or floating core, which is arranged freely in the flat housing 11 is.
  • the housing is multi-layered, concretely double-shelled and has at least one core 22 and an outer shell.
  • the core 22 is not direct, i. not materially connected to the flat housing 11.
  • the fixation of the core 22 in the flat housing 11 is effected by the force exerted by the clamping portions 15 contact forces, which compress the heating elements and the core 22 arranged therebetween.
  • the difference with respect to the clamping portions 15 is that the two Schwarzmour 12 on each side of the flat housing, a single clamping section 15 is associated.
  • the clamping portion 15 thus overlaps both side slots 14 and generally more, in particular all side slots 14 on the same side of the housing.
  • the common clamping section 15 is fastened to the two outer edges of the flat housing 11 and corresponds in this respect to the embodiment according to FIG. 1.
  • the embodiment according to FIG. 3 has the advantage that these equally simple, for example by extrusion can be produced.
  • the assembly forces for expansion of the flat housing 11 are applied in opposite directions at both clamping portions 15 such that the convexly curved clamping portions 15 are flattened, so that the outer shaft walls 13a are moved apart , The radius of the clamping portions 15 is increased.
  • For fixing is - after the core 22 is introduced with the two heating elements 10 in the flared flat housing 11 - repealed the assembly force. Due to the excess of the heating elements 10 in the height direction, the clamping portions 15 can not return to the starting position, but remain elastically deformed, whereby the required contact pressure is applied.
  • the core 22 and the outer shell or the flat housing 11 may be constructed of different combinations of materials with different or equal expansion coefficients in order to achieve a constant contact pressure.
  • Fig. 5, 6 show two embodiments in which the heating shaft 12, specifically the suspension of the shaft walls 13a, 13b is modified to increase the travel. This has the advantage that tolerances can be better compensated.
  • each shaft wall 13a, 13b is connected on one side to the flat housing 11.
  • first longitudinal edge 25a of a shaft wall 13a, 13b is connected to the flat housing 11.
  • second longitudinal edge 25b of the shaft wall 13a, 13b is free.
  • the second longitudinal edge 25b is not connected to the flat housing 11, but movable relative to the flat housing 11.
  • Both shaft walls 13a, 13b are fastened correspondingly to the flat housing 11, wherein the free longitudinal edges 25b of the shaft walls 13a, 13b are arranged on opposite sides.
  • the free longitudinal edge 25b of the one shaft wall 13a is arranged on the same side of the housing as the longitudinal edge 25a of the other shaft wall 13b connected to the flat housing 11.
  • the side slit 14 is covered on both sides in each case by a side wall 19 of the flat housing 11.
  • the free longitudinal edge 25b is spaced from the side wall 19, so that a movement of the free longitudinal edge 25b along the side wall 19 is unhindered possible.
  • the clamping portions 15 engage the foot of the respective side wall 19.
  • the foot opposite the end 26 of the respective side wall 19 is free.
  • the free ends 26 of the side walls 19 are arranged offset on opposite sides of the housing or diagonally.
  • the clamping portions 15 each engage over the side slot 14 and the free end 26 of the respective side wall 19 and are connected on the opposite side of the housing with the foot of the other side wall 19.
  • the clamping portions 15 go in the region of the free ends 26 of the side walls 19, without touching them, in the respective straight outer wall 16 of the flat housing over.
  • the distance between the free end 26 of the side wall 19 and the cross-part of the clamping portion 15 is dimensioned so that a sufficient spring travel is possible.
  • cooling fins 27 are provided on the outside of the shaft walls.
  • the side wall 19 projects beyond the associated shaft wall 13a, 13b and also forms a cooling rib 27.
  • Other forms of cooling fins are possible.
  • clamping sections 15 which is arrow-shaped according to FIG.
  • clamping portions 15 together with the respectively associated side wall 19 form an approximately triangular cross-sectional profile with a straight leg 28, wherein a tip of the triangular cross-sectional profile is opened.
  • the open tip corresponds to the free end 26 of the respective side wall 19.
  • the tensioning section according to FIG. 6 is disclosed as an alternative in connection with the other exemplary embodiments.
  • the cooling and holding body of FIG. 7 is similar in basic construction as the cooling and holding body shown in FIG. 5, 6 is formed.
  • the two shaft walls 13a, 13b are connected to the flat housing 11 in the region of the first longitudinal edge 25a, as in FIGS. 5, 6, such that the movement of the shaft walls 13a, 13b for mounting in the region of the first longitudinal edges 25a by the flat housing 11, in particular is introduced through the respective clamping portions 15 of the flat housing 11.
  • the first longitudinal edges 25a of the two shaft walls 13a, 13b are each connected to the flat housing 11 on opposite sides.
  • the first longitudinal edges 25a are located diagonally opposite. The same applies to the position of the second free longitudinal edges 25b.
  • the embodiments according to FIG. 5, 6, 7 correspond.
  • FIG. 7 reference is made to the statements relating to FIGS. 5, 6.
  • the difference between the embodiment of FIG. 7 and the examples of FIG. 5, 6 is that the two shaft walls 13 a, 13 b are each connected to a stiffening rib 29.
  • the stiffening rib 29 engages on the outside of the respective shaft wall 13a, 13b, ie on the side facing away from the heating shaft 12 side of the respective shaft wall 13a, 13b.
  • the point of application or the line of attack of the stiffening rib 29 is located in each case between the first and second longitudinal edges 25a, 25b of the respective shaft wall 13a, 13b.
  • the longitudinal rib 29 is connected to the flat housing 11 in the region of the first longitudinal edge 25a of the associated shaft wall 13a, 13b.
  • the longitudinal rib 29 forms an extension of the respective side wall 19 of the flat housing.
  • the side wall 19 is beveled above the first longitudinal edge 25a and forms a parallel to the outer wall 16 extending web 30a.
  • the free end 26 of the side wall 19 which is spaced from the outer wall 16 and the associated clamping portion 15.
  • the parallel web 30a thus extends between the outer wall 16 and the associated shaft wall 13a, 13b.
  • the parallel web 30a is bent and merges into a transverse web 30b, which is connected to the outside of the shaft wall 13a, 13b.
  • the stiffening rib 29 extends, as can be seen in FIG. 7, in the longitudinal direction of the flat housing 11 over the entire axial length of the flat housing 11.
  • each shaft wall 13a, 13b is thus connected at two points to the flat housing 11.
  • the contact pressure is also comparable.
  • the connection of a shaft wall 13a, 13b to the flat housing 11 takes place on one and the same side of the respective shaft wall 13a, 13b. This means that in the first shaft wall 13a, the first longitudinal edge 25a and the reinforcing rib 29 on the same side are connected to the flat housing 11, specifically to the side wall 19 of the flat housing 11. This ensures that the transmitted through the side wall 19 movement or contact force in one and the same
  • Shaft wall 13a, 13b is initiated.
  • the contact force acting in opposite directions is generally achieved by the nested arrangement of the clamping surfaces 15 and the shaft walls 13a, 13b.
  • the nested arrangement means that the attack sites, at where the clamping portions 15 are connected to the flat housing 11, are arranged at diagonal corners of the flat housing 11. Accordingly, the free ends 26 of the side walls 19 are arranged at diagonally opposite corners of the flat housing.
  • the diagonal arrangement of the points of attack of the clamping portions 15 and the free ends 26 is achieved that at an increase in the radius of the clamping portions 15, for example, by applying a mounting force, the attack points at which the clamping portions 15 are connected to the flat housing 11, pressed apart.
  • stiffening chambers 31 are provided in each case in the lower region of the side walls 19, which also improve the heat transfer through the enlarged surface.
  • the stiffening chambers 31 are respectively provided at the foot end of the side walls 19, d. H. in the area in which the clamping portions 19 are connected to the flat housing 11.
  • the transitions of the clamping sections 15 to the flat housing 11 or to the side walls 19 have curves in order to reduce the notch effect. This ensures that even in the area of the transitions the deformation is below the elastic limit, ie in the area of Hooke's straight line.

Landscapes

  • Air-Conditioning For Vehicles (AREA)
  • Resistance Heating (AREA)
  • Secondary Cells (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)

Abstract

L'invention concerne un corps de refroidissement et de retenue pour des éléments chauffants (10), en particulier des éléments chauffants CTP, comportant un boîtier plat (11) doté d'au moins un puits de chauffage (12) dans lequel est disposé au moins un élément chauffant (10). Le puits de chauffage (12) comporte des parois (13a, 13b) opposées, entre lesquelles l'élément chauffant (10) est serré, et au moins une fente latérale (14) séparant les parois (13a, 13b) du puits, de telle manière que l'écart entre les parois (13a, 13b) du puits peut être modifié pour le montage de l'élément chauffant (10). Au moins une partie de serrage (15) faisant saillie vers l'extérieur du boîtier plat vient en prise avec le boîtier plat (11), recouvre la fente latérale (14) et, dans l'état monté de l'élément chauffant (10), est déformé élastiquement pour produire une force de pression des parois (13a, 13b) du puits agissant sur l'élément chauffant (10).
EP12787386.7A 2011-10-24 2012-10-22 Corps de refroidissement et de retenue pour éléments chauffants, appareil de chauffage et procédé de fabrication d'un corps de refroidissement et de retenue Active EP2772116B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12787386T PL2772116T3 (pl) 2011-10-24 2012-10-22 Układ chłodzący i mocujący dla elementów grzewczych, urządzenie grzewcze i sposób wytwarzania układu chłodzącego i mocującego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011054752.5A DE102011054752B4 (de) 2011-10-24 2011-10-24 Kühl- und Haltekörper für Heizelemente, Heizgerät und Verfahren zur Herstellung eines Kühl- und Haltekörpers
PCT/EP2012/070871 WO2013060647A1 (fr) 2011-10-24 2012-10-22 Corps de refroidissement et de retenue pour éléments chauffants, appareil de chauffage et procédé de fabrication d'un corps de refroidissement et de retenue

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EP2772116A1 true EP2772116A1 (fr) 2014-09-03
EP2772116B1 EP2772116B1 (fr) 2018-01-17

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US (1) US9661689B2 (fr)
EP (1) EP2772116B1 (fr)
JP (1) JP6075801B2 (fr)
CN (1) CN103891399B (fr)
BR (1) BR112014009640A2 (fr)
DE (1) DE102011054752B4 (fr)
ES (1) ES2665304T3 (fr)
IN (1) IN2014CN02579A (fr)
PL (1) PL2772116T3 (fr)
RU (1) RU2599530C2 (fr)
TW (1) TWI606777B (fr)
WO (1) WO2013060647A1 (fr)

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Also Published As

Publication number Publication date
RU2014120902A (ru) 2015-12-10
JP2014534573A (ja) 2014-12-18
ES2665304T3 (es) 2018-04-25
CN103891399A (zh) 2014-06-25
CN103891399B (zh) 2016-01-20
JP6075801B2 (ja) 2017-02-08
TWI606777B (zh) 2017-11-21
BR112014009640A2 (pt) 2017-06-13
DE102011054752A1 (de) 2013-04-25
EP2772116B1 (fr) 2018-01-17
PL2772116T3 (pl) 2018-07-31
US20140299293A1 (en) 2014-10-09
IN2014CN02579A (fr) 2015-06-26
DE102011054752B4 (de) 2014-09-04
TW201325424A (zh) 2013-06-16
US9661689B2 (en) 2017-05-23
WO2013060647A1 (fr) 2013-05-02
RU2599530C2 (ru) 2016-10-10

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