EP3154311B1 - Substrat de dissipation de chaleur et dispositif de chauffage à thermistance à coefficient de température positif du type à joint d'étanchéité - Google Patents

Substrat de dissipation de chaleur et dispositif de chauffage à thermistance à coefficient de température positif du type à joint d'étanchéité Download PDF

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Publication number
EP3154311B1
EP3154311B1 EP16732215.5A EP16732215A EP3154311B1 EP 3154311 B1 EP3154311 B1 EP 3154311B1 EP 16732215 A EP16732215 A EP 16732215A EP 3154311 B1 EP3154311 B1 EP 3154311B1
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Prior art keywords
cavity body
radiating
ptc heating
positioning
heating component
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EP16732215.5A
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German (de)
English (en)
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EP3154311A1 (fr
EP3154311A4 (fr
Inventor
Xiang Zhang
Guangquan Zhang
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Shenzhen Shanyuan Electronic Corp
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Shenzhen Shanyuan Electronic Corp
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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
    • 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
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • H05B3/50—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins
    • 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
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • F24H3/0435—Structures comprising heat spreading elements in the form of fins
    • 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
    • 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
    • F24H2250/04—Positive or negative temperature coefficients, e.g. PTC, NTC
    • 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 present application relates to a thermistor heater, in particular to a radiating matrix with a sealed PTC (Positive Temperature Coefficient) thermistor heater.
  • a radiating matrix as described in the preamble portion of patent claim 1 has been known from DE 10 2011 077 922 A1 .
  • a PTC thermistor heater has unique characteristics of automatic constant temperature, no open flame, long service life, small influence from power voltage fluctuation, high electrothermal conversion rate and the like, and has been widely applied to electric appliance industries of air heater, clothes dryer, water heater, air conditioner, etc.
  • the PTC heating element easily approaches to two side walls of the aluminum tube and is subjected to rigid press when press is applied to two sides of the aluminum tube to cause the aluminum tube to be deformed, the PTC heating element is easy to crush, quality hidden danger is caused and a user may worry about the quality.
  • CN 2917152Y discloses a radiating matrix containing a PTC heating component, comprising a cavity body, wherein the cavity body is provided with: a receiving portion extending along a length direction of the cavity body, a plurality of radiating fins are fixed in the middle of the external surface of the top and the external surface of the bottom of the cavity body, and the length of each radiating fin along a width direction of the cavity body is smaller than the width of the cavity body; wherein the outer wall of the left side and the outer wall of the right side of the cavity body are of a slot-shaped structure extending along the length direction of the cavity body.
  • the present application provides a radiating matrix and a sealed PTC thermistor heater, which can work for a long term without electrical safety hidden danger.
  • a radiating matrix containing a PTC heating component comprises a cavity body, wherein the cavity body is provided with a receiving portion extending along a length direction of the cavity body, a plurality of radiating fins are fixed in the middle of the external surface of the top and the external surface of the bottom of the cavity body, and the length of each radiating fin along a width direction of the cavity body is smaller than the width of the cavity body; a first positioning rib extending along a length direction of the cavity body is arranged at the upper part and the lower part of the inner wall of the left side of the cavity body in the receiving portion respectively, correspondingly, a second positioning rib extending along a length direction of the cavity body is arranged at the upper part and the lower part of the inner wall of the right side of the cavity body in the receiving portion respectively, the internal surface of the left side of the receiving portion between the two first positioning ribs is an outwards convex arc surface, the internal surface of the right side of the receiving portion between the two second positioning ribs is also an outwards
  • the first positioning ribs and the second positioning ribs cause the PTC heating component to be positioned in the middle of the receiving portion together, and since the internal surface of the left side of the receiving portion between the two first positioning ribs is an outwards convex arc surface and the internal surface of the right side of the receiving portion between the two second positioning ribs is also an outwards convex arc surface, when the cavity body is molded, the left side and the right side of the cavity body are stressed and outwards deformed, the slot-shaped structures provide a deforming space, the lateral sides of the PTC heating component cannot be subjected to lateral press, so that the PTC heating component is difficult to crush and working is safer.
  • the plurality of radiating fins are parallel and are equidistantly arrayed.
  • each radiating fin is of a convex concave corrugated structure.
  • the existing radiating fins are machined in to a slab curve surface, such fins have bad strength and rigidity and are easy to fall off, the fins are easily attached together, cause impeded ventilating and generate certain wind resistance, and dust is easily accumulated on the fins, while in above technical solution, the radiating fins are designed into the convex concave corrugated structure, that is, the surfaces of the radiating fins are in convex and concave alternative arrangement, for example, the radiating fins can be a wavy curve surface, a zigzag curve surface and a trapezoid curve surface.
  • the convex concave corrugated structure increases a radiating area and improves radiating efficiency; a reinforcing rib action can also be achieved for the radiating fins, thereby enhancing the rigidity and strength of the radiating fins; in a working process, the radiating fins are hard to fall off, thereby solving a series of problems caused by falling; and the strength and rigidity are good, the fins can be made thinner under the condition of the same radiating area, therefore material production cost can be greatly reduced and material can be saved.
  • the radiating matrix is of an integrally molded structure.
  • the radiating matrix is made of an aluminum profile.
  • the cavity body is a rectangle body and the first positioning ribs and the second positioning ribs are symmetrically arranged.
  • the internal surface of the top of the cavity body corresponding to the top surface of the PTC heating component has a low middle part and two high ends
  • the internal surface of the bottom of the cavity body corresponding to the bottom surface of the PTC heating component has a high middle part and two low ends.
  • the rigid press to the PTC heating component from an aluminum tube can be reduced, thereby reducing damage to the PTC heating component.
  • a sealed PTC thermistor heater comprises the radiating matrix, a PTC heating component and waterproof sealing parts, wherein the PTC heating component is positioned between the first positioning ribs and the second positioning ribs and is pressed in the middle of the receiving portion, and one waterproof sealing part is arranged at two ends of the receiving portion of the radiating matrix respectively.
  • the PTC heating component comprises a PTC thermistor, two electrode terminals connected with an external power source to be electrified to cause the PTC thermistor to heat, metal electrode plates and insulation layers, wherein one metal electrode plate is attached to the upper surface and lower surface of the PTC thermistor respectively, the two electrode terminals are positioned on the same side of the PTC thermistor and connected with the metal electrode plates respectively, and the insulation layers wrap the peripheries of the metal electrode plates, and the two electrode terminals extend from the waterproof sealing parts.
  • the waterproof sealing parts are waterproof insulating sealant capable of effectively blocking water.
  • the present application provides a radiating matrix, wherein the radiating matrix contains a PTC heating component and the present application is described in detail by following preferable embodiments.
  • the radiating matrix 1 comprises a cavity body 11, wherein the cavity body 11 is a rectangle body and has a receiving portion 12 extending along a length direction of the cavity body, a plurality of radiating fins 13 are fixed in the middle of the external surface of the top and the external surface of the bottom of the cavity body 11, the length of the radiating fin 13 at the external surface of the top of cavity body along a width direction of the cavity body 11 is smaller than the width of the top of the cavity body 11 and the length of the radiating fin 13 at the external surface of the bottom of cavity body along a width direction of the cavity body 11 is smaller than the width of the bottom of the cavity body 11.
  • a first positioning rib 14 extending along a length direction of the cavity body is arranged at the upper part and the lower part of the inner wall of the left side of the cavity body in the receiving portion 12 respectively, symmetrically, a second positioning rib 15 extending along a length direction of the cavity body is arranged at the upper part and the lower part of the inner wall of the right side of the cavity body in the receiving portion respectively, the internal surface 16 of the left side of the receiving portion between the two first positioning ribs 14 is an outwards convex arc surface (that is, an opening of the arc surface is toward the receiving portion), the internal surface 17 of the right side of the receiving portion between the two second positioning ribs 15 is also an outwards convex arc surface, and the outer wall of the left side and the outer wall of the right side of the cavity body are of a slot-shaped structure 18 extending along the length direction of the cavity body.
  • An interval between the two first positioning ribs 14 and an interval between the two second positioning ribs 15 are both smaller than the thickness of the PTC heating component, an interval between the first positioning rib 14 and the second positioning rib 15 at the upper part and an interval between the first positioning rib 14 and the second positioning rib 15 at the lower part are both smaller than the width of the radiating ribs 13, hence, when the radiating matrix is molded, the influence on the PTC heating component can be reduced as much as possible.
  • the radiating fins 13 at the top and bottom of the cavity body are parallel and equidistantly arrayed, the shape of each radiating fin 13 is of a convex concave corrugated structure, and in the present embodiment, the surface of the radiating fins are wavy curve surfaces.
  • the radiating matrix is of an integrally molded structure and made of an aluminum profile, and specifically, the cavity body, the radiating fins, the first positioning ribs and the second positioning ribs are integrally made of the aluminum profile, and the radiating fins are made from backing-off cutting machining by a machine tool at the top and bottom of the radiating matrix.
  • the internal surface of the top of the cavity body 11 corresponding to the top surface of the PTC heating component has a low middle part 111 and two high ends 112, and the internal surface of the bottom of the cavity body corresponding to the bottom surface of the PTC heating component has a high middle part 113 and two low ends 114.
  • the present application further provides a sealed PTC thermistor heater, comprising the radiating matrix 1 disclosed above and illustrated on FIG. 1 , the PTC heating component 2 and waterproof sealing parts 3, wherein the PTC heating component 2 is positioned between the first positioning ribs 14 and the second positioning ribs 15 and is pressed in the middle of the receiving portion, and one waterproof sealing part 3 is arranged at two ends of the receiving portion of the radiating matrix 1 respectively;
  • the PTC heating component 2 comprises a PTC thermistor 21, two electrode terminals 22 connected with an external power source to be electrified to cause the PTC thermistor to heat, metal electrode plates 23 and insulation layers 24, wherein one metal electrode plate 23 is attached to the upper surface and lower surface of the PTC thermistor 21 respectively, the metal electrode plates 23 provide a working voltage for the PTC thermistor 21, the two electrode terminals 22 are positioned on the same side of the PTC thermistor, one end of the electrode terminals 22 is connected with a power source by a lead
  • An other example of the radiating matrix differs from the radiating matrix disclosed above in that the shape of the radiating fins on the radiating matrix is a zigzag curve surface.

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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)

Claims (10)

  1. Une matrice rayonnante (1), servant à contenir un composant chauffant CTP (2), comprenant un corps creux (11), ledit corps creux (11) étant doté d'une cavité contenante (12) s'étirant dans le sens de la longueur dudit corps creux (11), la surface externe de la partie supérieure et la surface externe de la partie inférieure dudit corps creux (11) étant dotées respectivement d'une pluralité d'ailettes rayonnantes (13) fixées en leurs milieux, chacune desdites ailettes rayonnantes (13) étant de longueur inférieure à la largeur dudit corps creux (11) dans le sens de la largeur dudit corps creux (11) ;
    des premières côtes de positionnement (14) sont agencées dans le sens de la longueur dudit corps creux respectivement à la partie supérieure et la partie inférieure de la paroi interne gauche dudit corps creux (11) de ladite cavité contenante (12), de façon correspondante, des deuxièmes côtes de positionnement (15) sont agencées dans le sens de la largeur dudit corps creux (11) respectivement à la partie supérieure et la partie inférieure de la paroi interne droite dudit corps creux (11) de ladite cavité contenante (12), la surface interne (16) du côté gauche de ladite cavité contenante (12) entre deux desdites premières côtes de positionnement (12) est une surface en arc convexe orienté vers l'extérieur, la surface interne (17) du côté droit de ladite cavité contenante (12) entre deux desdites deuxièmes côtes de positionnement (12) est également une surface en arc convexe orienté vers l'extérieur, et
    le composant chauffant CTP est agencé dans ladite matrice rayonnante, l'intervalle entre deux dites premières côtes de positionnement (14) et l'intervalle entre deux dites deuxièmes côtes de positionnement (15) étant tous inférieurs à l'épaisseur dudit composant chauffant CTP, l'intervalle entre ladite première côte de positionnement (14) et ladite deuxième côte de positionnement (15) agencées à la partie supérieure et l'intervalle entre ladite première côte de positionnement (14) et ladite deuxième côte de positionnement (15) agencées à la partie inférieure étant inférieurs à la longueur desdites ailettes rayonnantes (13) dans le sens de la largeur dudit corps creux (11) ;
    caractérisé en ce que, lesdites premières côtes et lesdites deuxièmes côtes agencées à la partie supérieure sont simultanément également agencées à la surface interne de la partie supérieure dudit corps creux, lesdites premières côtes et lesdites deuxièmes côtes agencées à la partie inférieure sont simultanément également agencées à la surface interne de la partie supérieure dudit corps creux ;
    la paroi externe du côté gauche et la paroi externe du côté droit dudit corps creux constituent une structure en forme de fente s'étendant dans le sens de la longueur dudit corps creux, après agencement du composant chauffant CTP dans ladite matrice rayonnante, lesdites premières côtes de positionnement et lesdites deuxièmes côtes de positionnement permettent conjointement au composant chauffant CTP d'être fixé de façon centrale dans ledit corps creux, lors du moulage dudit corps creux, le côté gauche et le côté droit dudit corps creux sont déformés vers l'extérieur après avoir subi une pression, ladite structure en forme de fente fournit un espace de déformation.
  2. Matrice rayonnante (1) selon la revendication 1, caractérisée en ce que : la pluralité desdites ailettes rayonnantes (13) sont parallèles et agencées de façon équidistante.
  3. Matrice rayonnante (1) selon la revendication 1, caractérisée en ce que : la forme de chacune desdites ailettes rayonnantes (13) est une structure ondulée convexe et concave.
  4. Matrice rayonnante (1) selon la revendication 1, caractérisée en ce que : ladite matrice rayonnante (1) est une structure monobloc.
  5. Matrice rayonnante (1) selon la revendication 1, caractérisée en ce que : ladite matrice rayonnante (1) est un profil d'aluminium.
  6. Matrice rayonnante (1) selon la revendication 1, caractérisée en ce que : ledit corps creux (11) est un corps rectangulaire, lesdites premières côtes de positionnement (14) et lesdites deuxièmes côtes de positionnement (15) étant agencées symétriquement.
  7. Matrice rayonnante (1) selon la revendication 1, caractérisée en ce que : la surface interne de la partie supérieure dudit corps creux (11) correspondant à la surface supérieure dudit composant chauffant CTP est dotée d'un milieu (111) bas et de deux extrémités (112) élevées, la surface interne de la partie inférieure dudit corps creux (11) correspondant à la surface inférieure dudit composant chauffant CTP est dotée d'un milieu (113) élevé et de deux extrémités (114) basses.
  8. Dispositif chauffant à thermistance CTP hermétique, caractérisé en ce que : il comprend la matrice rayonnante (1) de l'une quelconque des revendications 1-7, un composant chauffant CTP (2) et une partie hermétique étanche à l'eau (3), ledit composant chauffant CTP (2) est agencé entre lesdites premières côtes de positionnement (14) et lesdites deuxièmes côtes de positionnement (15) et est comprimée à la partie moyenne de ladite cavité contenante (12), les deux extrémités de ladite cavité contenante (12) de ladite matrice rayonnante (1) sont respectivement dotées desdites parties hermétiques étanches (3).
  9. Dispositif chauffant à thermistance CTP hermétique selon la revendication 8, caractérisé en ce que : ledit composant chauffant CTP (2) comprend une thermistance CTP (21), deux bornes d'électrodes (22) connectées à une alimentation externe afin d'être électrifiées et de chauffer la thermistance CTP (21), des plaques d'électrodes (23) et des couches isolantes (24), la surface supérieure et la surface inférieure de ladite thermistance CTP (21) sont respectivement accolées à une plaque d'électrodes (23), deux desdites bornes d'électrodes (22) sont agencées sur un même côté de ladite thermistance CTP (21) et respectivement connectées à ladite plaque d'électrodes (23), lesdites couches isolantes (24) enveloppent la périphérie de ladite plaque d'électrodes (23), deux desdites bornes d'électrodes (22) s'étirent depuis ladite partie hermétique étanche (3).
  10. Dispositif chauffant à thermistance CTP hermétique selon la revendication 8 ou la revendication 9, caractérisé en ce que : ladite partie hermétique étanche (3) est un enduit isolant étanche à l'eau capable de bloquer l'eau efficacement.
EP16732215.5A 2015-08-03 2016-05-13 Substrat de dissipation de chaleur et dispositif de chauffage à thermistance à coefficient de température positif du type à joint d'étanchéité Active EP3154311B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510482014.6A CN105025596B (zh) 2015-08-03 2015-08-03 一种散热基体及密封型ptc热敏电阻加热器
PCT/CN2016/081996 WO2017020622A1 (fr) 2015-08-03 2016-05-13 Substrat de dissipation de chaleur et dispositif de chauffage à thermistance à coefficient de température positif du type à joint d'étanchéité

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Publication Number Publication Date
EP3154311A1 EP3154311A1 (fr) 2017-04-12
EP3154311A4 EP3154311A4 (fr) 2017-11-29
EP3154311B1 true EP3154311B1 (fr) 2019-12-11

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EP (1) EP3154311B1 (fr)
CN (2) CN110730519A (fr)
WO (1) WO2017020622A1 (fr)

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CN105025596B (zh) 2022-05-24
WO2017020622A1 (fr) 2017-02-09
CN105025596A (zh) 2015-11-04
CN110730519A (zh) 2020-01-24
EP3154311A1 (fr) 2017-04-12
EP3154311A4 (fr) 2017-11-29

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