WO2002096158A1 - Corps chauffant par la surface a base de materiau conducteur - Google Patents

Corps chauffant par la surface a base de materiau conducteur Download PDF

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Publication number
WO2002096158A1
WO2002096158A1 PCT/KR2002/000775 KR0200775W WO02096158A1 WO 2002096158 A1 WO2002096158 A1 WO 2002096158A1 KR 0200775 W KR0200775 W KR 0200775W WO 02096158 A1 WO02096158 A1 WO 02096158A1
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WO
WIPO (PCT)
Prior art keywords
conductive material
conducting members
sub
conducting
main
Prior art date
Application number
PCT/KR2002/000775
Other languages
English (en)
Inventor
Seung-Jae Lee
Jae-Do Nam
Soo-Jeong Shu
Jun-Won Yoon
Original Assignee
Jdtec Co. Ltd.
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 Jdtec Co. Ltd. filed Critical Jdtec Co. Ltd.
Publication of WO2002096158A1 publication Critical patent/WO2002096158A1/fr

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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
    • H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
    • H05B3/845—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields specially adapted for reflecting surfaces, e.g. bathroom - or rearview mirrors
    • 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
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • 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
    • H05B2203/013—Heaters using resistive films or coatings
    • 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
    • H05B2203/017—Manufacturing methods or apparatus for heaters

Definitions

  • the present invention relates to a plane heater using a conductive material, and more particularly, to a plane heater using a conductive material comprising an electric heater which is thin and flat, main conducting members secured to the upper surface of the electric insulator, respectively connected to a pair of electrodes and subjected to a surface treatment including silver plating, aluminum plating or etching, a plurality of sub-conducting members diverged from the main conducting members in such a manner that a sub- conducting member diverged from one main conducting member is spaced apart from a sub-conducting member diverged from the other main conducting member by a predetermined gap, a conductive material applied to the upper surfaced of the electric insulator, the main conducting members and the sub- conducting members, and made of a material, such as PTCR, and an adhesive applied to the upper surface of the conductive material so as to be adhered to the rear surface of an object to be heated.
  • a conductive material comprising an electric heater which is thin and flat, main conducting members secured to the upper surface of the
  • a thermistor resistance of which drastically increases with temperature in a certain range of temperature
  • a PTC (Positive Temperature Coefficient) thermistor is used as an electric element or a heater for preventing overheat and over-current. It is mostly materialized of ceramics but recently polymer is used as a material thereof, thereby enabling its wider application.
  • a polymer PTC thermistor is characterized in that as ambient temperature rises or its temperature rises because of self-heating, its resistance gradually increases to a certain level and then sharply increases in a certain range of temperature .
  • the PTC thermister when a current less than a predetermined level is applied to the PTC thermister, it can function as a general fixed resistor since a Joule heat generated therefrom and a heat dissipated to the outside are balanced together.
  • overcurrent more than the predetermined level is applied from the outside to a circuit and flows through the PTC thermistor, however, the thermal equilibrium is broken. Due to self-heating of the PTC thermistor, temperature and resistance of the PTC thermistor simultaneously increase whereby over-current flowing in the circuit is cut off and the circuit and components can be protected from the over-current. Meanwhile, once the cause of over-current is eliminated, a low resistance is formed again and the circuit normally operates.
  • the PTC thermistor when used as a heater, it can let lots of currents flowing with a low resistance at a low temperature so that it can apply heat in a short period of time, whereas when temperature increases to a certain level, its resistance drastically increases in a predetermined temperature range so that it can balance a Joule heat supplie thereto and a heat dissipated to the outside in the predetermined range of temperature, resulting in achievement of a positive temperature state.
  • the PTC thermistor when used as a heater, there are many cases that it can be used in households or vehicles . Its drastic change in resistance with temperature rather makes over-current flowing at a low temperature, and may cause a problem of exceeding capacity.
  • the PTC heater used as a general heater showed that its resistance decreases about 30-50% at a temperature of -40°C or so when a reference resistance is defined at a normal temperature of 20°C, so as to prevent over-current from flowing, while its resistance increases 1000% at a temperature of about 60-70°C, so as to prevent temperature from increasing by a self-current .
  • the polymer PTC thermistor is of a disk- , rectangular plate-, ring-, rod-, or small chip-shape such that it can be widely applied to a temperature sensor, a circuit protection device, a color TV degaussing element, a PTC heater, a starting motor and so on.
  • the polymer PTC heater is a kind of film-type plane heater and generates heat due to a Joule heat emitted from a conductive material therein during conduction. It is widely applied to all articles in which a plane heater can be used, for example, a mirror heater of a vehicle, a hot wire in a heating sheet, a heater for a bathroom mirror, a strip type heater in various warmers, a hot wire in a mat, etc.
  • FIG. 1 is a plan view of a conventional plane heater using a conductive material
  • FIG. 2 is a cross-sectional view taken along the line A-A of FIG. 1.
  • the plane heater comprises : an electric insulator 3 which is thin and flat; main conducting members 1 and 1' secured to the upper surface of the electric insulator 3, connected to a pair of electrodes 6 and 6' and subjected to a surface treatment including silver plating, aluminum plating or etching; a plurality of sub- conducting members 2 and 2' diverged from the main cond ⁇ cting members 1 and 1' in such a manner that a sub-conducting member diverged from one main conducting member is spaced apart from a sub-conducting member diverged from the other main conducting member by a predetermined gap G; a conductive material 4 applied to the upper surface of the electric insulator 3, the main conducting members 1 and 1' and the sub- conducting members 2 and 2', and materialized of PTCR and so on; and an adhesive 5 applied to the upper surface of the conductive material 4 so as to be attached to the rear surface of an object to be heated.
  • the adhesive 5 is made of an insulating material
  • the main conducting members 1 and 1' connected to the pair of electrodes 6 and 6' are subjected to a surface treatment including silver plating, aluminum plating, or etching.
  • the main conducting members 1 and 1' are upwardly and downwardly connected to the central portion where the electrodes 6 and 6' are disposed, such that the main conducting members 1 and 1' are respectively distributed at the upper and lower portions along an edge portion of the plane heater.
  • the plurality of sub-conducting members 2 and 2' are diverged from the main conducting members 1 and 1' , which are distributed at the upper and lower peripheral portions of the electric insulator 3, in such a manner that a sub- conducting member is diverged from one main conducting member and extends toward the other main conducting member.
  • the respective sub-conducting members 2 and 2' are spaced apart from each other by a predetermined gap G.
  • the conductive material 4 using PTCR or polymer is uniformly disposed on the upper surface of the conducting members, whereby the conductive material 4 applied in the gaps between the sub-conducting members 2 and 2' acts as a resistor when the electrodes 6 and 6' apply electricity, so as to radiate heat .
  • the main conducting members 1 and 1' are connected to the central portion and extend to the upper and lower ends of the plane heater and then extend along the peripheral portions of the plane heater, thereby occupying a considerable area. Since the main conducting members 1 and 1' don't function as a resistor, disadvantageously, heating area is accordingly reduced and heating is unevenly distributed.
  • the main conducting members 1 and 1' require such a treatment as expensive silver plating, or aluminum or nickel plating, whereby as the area occupied by the main conducting members 1 and 1' is increased, manufacturing costs of the plane heater is also increased.
  • the sub- conducting members 2 and 2' are vertically connected in parallel, whereby the length thereof is smaller than the width of the electric insulator 3 and thus a relatively larger number of sub-conducting members 2 and 2' are distributed as a whole.
  • the number of the sub-conducting members 2 and 2' becomes larger, the possibility of causing an error in the gap G is increased and therefore heating is apt to be unevenly distributed.
  • a conductive paste is first applied, or a metallic material is first applied to or etched on the electric insulator 3 to form the conducting members 1, 2 and 2' and then the conductive material 4, i.e., PTCR is applied.
  • the conductive material 4 i.e., PTCR is applied.
  • the conductive material 4 i.e., PTCR is applied, the conductive material 4 as well as the conducting members 1, 2 and 2' should be uniformly applied to the electric insulator 3 to correspond to its relative position to the electric insulator 3. A great attention is required in the conventional manufacturing process and defective proportion is increased.
  • the adhesive 5 since the adhesive 5 contacts the conductive material, i.e., heating body, in case that high heat occurs in the conductive material 4, the adhesive 5 may cause a chemical change. In consequence, the expected lifespan of the adhesive 5 is decreased and an abnormal heating may be caused.
  • the conventional manufacturing process usually requires a total of 4 drying processes or more as follows. After the conducting members 1, 2 and 2' are applied to the electric insulator 3, a drying process is performed twice to achieve an appropriate resistance in the conducting members circuit. Next, after the conductive material 4, i.e., PTCR is applied to the conducting members 1, 2 and 2', a drying process is performed twice again. Because of the large number of drying processes, the manufacturing process takes a long time until products are completed and manufacturing costs are increased.
  • the conductive material i.e., PTCR is multi- applied.
  • the conductive material is applied to the conducting members 1, 2 and 2', if another conductive material needs to be applied, both the first and second conductive materials directly contact each other.
  • the present invention is directed to a plane heater using a conductive material that substantially obviates one or more problems due to limitations and disadvantages of the related art.
  • An object of the present invention is to provide a plane heater using a conductive material in which main conducting members requiring a surface treatment, such as silver plating, aluminum plating or etching, are arranged to extend from the edge portion toward the center or convergently arranged at the central portion and sub-conducting members diverged from the main conducting members are arranged in the form of a contour line extending from the center to the edge portion, thereby significantly improving heating efficiency and reducing manufacturing costs .
  • Another object of the present invention is to provide a plane heater using a conductive material in which the conductive material is first applied to a substrate which is an electric insulator and dried, and then conducting members are disposed on the dried conductive material, thereby simplifying manufacturing processes and decreasing defective proportion. Because the arrangement of the conducting members, the area occupied by the main conducting members which require the surface treatment is reduced, manufacturing costs are reduced, heating area is widen, and the unit length of the sub- conducting members which maintain a predetermined gap from each other is elongated and uniformly distributed. Also, the total number of circuits is reduced and thus there can be significantly reduced the possibility of causing an uneven heating distribution due to an error in gap between the main conducting members and the sub-conducting members.
  • a further object of the present invention is to provide a plane heater using a conductive material in which the conductive material, i.e., PTCR is first widely applied to an electric insulator and thereafter conducting members are formed on the conductive material such that there is no need to correspond a relative position of the conductive material applied each case, thereby considerably simplifying manufacturing processes .
  • the conductive material i.e., PTCR is first widely applied to an electric insulator and thereafter conducting members are formed on the conductive material such that there is no need to correspond a relative position of the conductive material applied each case, thereby considerably simplifying manufacturing processes .
  • a still further object of the present invention is to provide a plane heater using a conductive material in which an adhesive is not in contact with the conductive material which is a heating body but adjacent to the conductive material with conducting members formed therebetween, whereby the adhesive is prevented from being overheated when being used, and thus reduction in lifespan or overheat of the plane heater generated due to a chemical change of the adhesive can be prevented.
  • Yet another object of the present invention is to provide a plane heater using a conductive material in which even in case that the conductive material is formed in a double structure, first and second conductive materials are not in contact with each other but have conducting members therebetween, whereby when the second conductive material is subjected to a silk screen printing by using a squeezer on the first conductive material, the surface of the first conductive material is prevented from being damaged and therefore heating efficiency of the conductive materials becomes more uniform.
  • FIG. 1 is a plan view illustrating a conventional plane heater
  • FIG. 2 is a cross-sectional view taken along the line A-A of FIG. 1;
  • FIG. 3 is a perspective view illustrating a rear-view mirror to which the conventional plane heater of FIG. 2 is applied;
  • FIG. 4 is a cross-sectional view illustrating a plane heater according to one preferred embodiment of the present invention
  • FIG. 5 is a cross-sectional view illustrating a plan heater according to another preferred embodiment of the present invention
  • FIG. 6 is a plan view illustrating a first example of the plane heater to which the embodiments of the present invention are applied;
  • FIG. 7 is a plan view illustrating a second example of the plane heater to which the embodiments of the present invention are applied.
  • FIG. 8 is a plan view illustrating a third example of the plane heater to which the embodiments of the present invention are applied.
  • FIG. 9 is a plan view illustrating a fourth example of the plane heater to which the embodiments of the present invention are applied.
  • FIG. 4 is a cross-sectional view illustrating a plane heater according to one preferred embodiment of the present invention
  • FIG. 5 is a cross-sectional view illustrating a plan heater according to another preferred embodiment of the present invention.
  • the PTCR is arranged between the conducting members 1, 2 and 2' such that when the conducting members 1, 2 and 2' conduct electricity, the conductive material 4 generates heat
  • the plane heater is characterized in that the conductive material 4 is first applied to the upper surface of the electric insulator 3, a circuit of the conducting members 1, 2 and 2' is formed by applying a conductive paste or applying/etching a metallic material to/on the upper surface of the conductive material 4, and an adhesive 5 is applied to the upper surface of the conducting members 1, 2 and 2' which project from the electric insulator 3 so as not to directly contact the conductive material 4.
  • the conductive material 4 such as PTCR, etc.
  • the substrate which is the electric insulator 3 whereby the conductive material 4 can be applied over the entire area of the substrate without corresponding to its relative position to the electric insulator.
  • the conducting members 1, 2 and 2' are just simply applied to the conductive material 4 to correspond to their relative positions to the conductive material 4.
  • the adhesive 5 is applied after the conducting members 1, 2 and 2' are formed, it is spaced from the conductive material 4 as far apart as the height of the conducting members 1, 2 and 2'.
  • the adhesive 5 is made of such an insulating material as acrylic, and used to make the plane heater adhered to the rear surface of an object to be heated, such as a rear- view mirror.
  • the conductive material i.e., PTCR is first applied to the upper surface of the flat electric insulator 3 which is usually in a film form. If an equipment for uniform application or roller coating is used, a mass production can be easily achieved by virtue of automatic operation and thickness can be adjusted by a precision machinery. In consequence, if the plane heater is used as a heater, it can ensure various temperature characteristics and uniform temperature distribution.
  • the adhesive 5 is adhered to the conductive material 4 while having the conducting members 1, 2 and 2' therebetween, such that there can be reduced effect of the adhesive material on the PTCR heating body.
  • an abnormal phenomenon of the PTCR heating body due to the adhesive' s chemical change at a high temperature can be also reduced.
  • the manufacturing process comprises the steps of : dissolving the conductive material 4, such as PTCR, in a solvent, and widely applying the dissolved conductive material 4 to the upper surface of the electric insulator 3 by a silk screen printing method or a roller coating method; performing a first heat treatment to remove the solvent contained in the conductive material 4; forming the conducting members 1, 2 and 2' on the solvent-removed conductive material in accordance with reference points so as to be matched with the position of the conductive material 4 while forming a circuit by applying a conductive paste, or applying or etching a metallic material; and performing a second heat treatment to remove the solvent contained in the conducting members 1, 2
  • Conditions for the heat treatment to remove the conductive material 4 should be set according to characteristics of individual products. However, at large, when dried for about 1 to 3 minutes at a temperature of 90 ⁇ 120 (C, higher than the boiling point of an organic solvent used for dissolution of polyolefin, most solvents evaporate and the conductive material 4 is maintained in a film state of 7-15 microns.
  • the conducting members 1, 2 and 2' should be applied to the position to which the conductive material 4 is applied.
  • a solvent that doesn't dissolve a base resin of the PTCR is preferably adopted.
  • the present applicant used a polyolefin resin as a binder of the conductive material 4, i.e., PTCR, and used a polyester polymero chemical and other solvent as a binder of the conducting members 1, 2 and 2', so that when the conducting members 1, 2 and 2' are applied, the surface of the conductive material 4 can be protected from being damaged and maintained in the existing flat film form.
  • the solvent contained in the conducting members should be dried in a given period of time. In this case, it is essential that characteristics of the PTCR material are not affected by drying temperature or time.
  • the applicant of the present invention performed a drying process for 10-20 minutes or so at a temperature of 100-135 (C with a result of satisfying both the characteristics of the PTCR material and the resistance of the conducting members . In the result, the applicant could reduce the second drying process of the PTCR material .
  • conductive materials 4 and 4' can be formed in a double structure as shown in FIG. 5.
  • the conductive materials 4 and 4' are applied in such a manner that the PTCR material is dissolved in the solvent and applied by a silk screen or a roller type coating method. According to the present invention, however, the conductive material 4' isn't be directly applied to the upper surface of the conductive material 4, which is applied earlier than the conductive material 4', but applied with the conducting members 1, 2 and 2' formed between the conductive material 4 and 4' . Accordingly, even though such a tool as squeezer is used, the conductive material 4' can be applied without damaging the surface of the conductive material 4.
  • the conductive materials 4 and 4' can be applied more thicker and PTCR effect, namely resistance change with temperature rise, can be more increased. Accordingly, there can be achieved a faster heating function at a lower temperature and a more efficient control over temperature rise at a higher temperature .
  • the conducting members 1, 2 and 2' are first applied to the conductive material 4 which is first applied and then the conductive material 4' is applied to the conducting members 1, 2 and 2' . It should be noted that the surface of the conductive material 4 which is first applied should be protected from being damaged by the solvent contained in the conductive material 4' which is second applied.
  • the applicant applied the second conductive material 4' and thereafter putted the same into a drying furnace in about 10-20 seconds with a result of a uniform surface of the second conductive material 4' .
  • a user can apply the conductive material 4 to the upper surface of' the electric insulator 3 only if he or she widely applies the conductive material 4 without a specific reference. Only for the conducting members 1, 2 and 2 ' , he or she should apply them in accordance with their reference points. As a result, the edge portion of the plane heater can be cut whereby the process control can be accordingly facilitated and a PTCR applying jig can be simplified. Since the PTCR material can be applied without considering any reference point, a mass application can be carried out by employing a roller type printing method and a roller type coating method as well as a screen printing method using a squeezer.
  • the conductive material 4 i.e., PTCR is applied to the upper surface of the dried conducting members 1, 2 and 2' and the drying processes are carried out twice again, thereby requiring the drying processes four times or more.
  • the conducting members 1, 2 and 2' are applied and the first to second drying processes are performed at the same time, such that the second drying process of the conductive material 4 is not separately carried out .
  • the present invention is accordingly simpler in the manufacturing process than the conventional art .
  • FIG. 6 is a plan view illustrating a first example of the plane heater to which the embodiments of the present invention are applied
  • FIG. 7 is a plan view illustrating a second example of the plane heater to which the embodiments of the present invention are applied
  • FIG. 8 is a plan view illustrating a third example of the plane heater to which the embodiments of the present invention are applied
  • FIG. 9 is a plan view illustrating a fourth example of the plane heater to which the embodiments of the present invention are applied.
  • the improvement comprises: main conducting members 1 and 1' arranged to extend from an edge portion toward the electric insulator 3 , respectively connected to a pair of electrodes 6 and 6' and subjected to a surface treatment including silver plating, aluminum plating or etching, the plurality of sub- conducting members 2 - and 2' respectively diverged from the main conducting members 1 and 1' in such a manner that a sub- conducting member diverged from one main conducting member is spaced apart from a sub-conducting member diverged from the other conducting member by a predetermined gap G, the conductive material 4 applied to the upper surface of the electric insulator 3, the main conducting members 1 and 1' and the sub-conducting members 2 and 2', and made of a material, such as PTCR, and the adhesive 5 applied to the upper surface of the conductive material 4 so as to be adhered to the rear surface of an object to be heated, the improvement comprises: main conducting members 1 and 1' arranged to extend from an edge portion toward the electric insulator 3 , respectively connected to a pair of
  • the plurality of sub-conducting members 2 and 2' are alternately arranged from the central portion toward the edge portion, such that each sub-conducting member diverged from one main conducting member extends from the central portion toward the edge portion and returns to the central portion where the other main conducting member is located.
  • the sub-conducting members 2 and 2' are in the contour form.
  • the adhesive 5 is made of such an insulating material as acrylic.
  • the plane heater is applied to a rear-view mirror 10 as illustrated in FIG. 3, it is adhered to the rear surface of an inner side of the rear-view mirror 10 by means of the adhesive 5.
  • sub-conducting members 2 and 2' diverged from the main conducting members 1 and 1' are spaced apart from each other by a predetermined gap G, and alternately arranged to face each other.
  • the sub-conducting members 2 and 2' are spaced apart from each other by the predetermined gap G but the conductive material 4, e.g. PTCR, is coated between the sub-conducting members 2 and 2', whereby when the electrodes 6 and 6' conduct electricity, the conductive material 4 applied between the sub-conducting members 2 and 2' acts as a resistor, so as to generate heat.
  • the main conducting members 1 and 1' are all arranged to extend from the edge portion to the center or convergently arranged at the central portion, the length of the main conducting members 1 and 1' can be shorter than that of the related art and the area occupied by the main conducting members 1 and 1' can be reduced.
  • the heating area is relatively increased and the heating is uniformly distributed.
  • the main conducting members 1 and 1' require the expensive surface treatment including silver plating, aluminum plating or etching such that as the area occupied by the main conducting members 1 and 1' is reduced, the manufacturing costs of the plane heater are further reduced.
  • the sub- conducting members 2 and 2' are not in a linear form but put around the area ranging from the center to the edge portion and return to the center again, whereby the sub-conducting members 2 and 2' become much elongated in the unit length, as compared with the conventional art, and the number of the sub- conducting members 2 and 2' is accordingly reduced, thereby reducing the possibility of causing an error in the gap G and an uneven heating distribution.
  • the main conducting members 1 and 1' requiring the surface treatment including silver plating, aluminum plating or etching are arranged to extend from the edge portion toward the center or convergently arranged at the central portion, and the sub-conducting members 2 and 2' diverged from the main conducting members 1 and 1' are arranged in the contour form extending from the center to the edge portion, thereby significantly improving heating efficiency and reducing manufacturing costs, relative to the conventional art .
  • the conductive materials 4 and 4' are first applied to the substrate which is the electric insulator 3 and dried, and then the conducting members 1, 2 and 2' are arranged on the dried conductive materials 4 and 4', thereby simplifying the manufacturing process and decreasing defective proportion. That is to say, since the main conducting members 1 and 1' are arranged to extend from the edge portion toward the center or convergently arranged at the central portion so as for the sub-conducting members 2 and 2' to be arranged at the central portion in the contour form, the area occupied by the main conducting members 1 and 1' which require the surface treatment including plating, is reduced, and thus the manufacturing costs are reduced and the heating area is widened.
  • the sub-conducting members 2 and 2' which maintain the predetermined gap from each other is elongated, the sub-conducting members can be uniformly distributed and the number of the entire circuits is also reduced, thereby ' significantly decreasing the possibility of causing an uneven heating distribution due to the error in the gap between the main conducting members and the sub- conducting members.
  • the conductive material i.e., PTCR is first widely applied to the upper surface of the electric insulator 3 and then the conducting members 1, 2 and 2' are formed on the upper surface of the conductive material 4, whereby the relative position of the conductive material applied doesn't need to be corresponded, resulting in achievement of a simpler manufacturing process .
  • the adhesive 5 is not in a direct contact with the conductive material 4 which is a heating body but adjacent to the conductive material 4 by interposing the conducting members 1, 2 and 2' between the adhesive 5 and the conductive material 4, whereby the adhesive is prevented from being overheated when being used, thereby not shortening the lifespan of the plane heater and not causing overheat due to a chemical change of the adhesive.
  • the first and second conductive materials are not in a direct contact with each other but have the conducting members 1, 2 and 2' formed therebetween, whereby even when the second conductive material is subjected to a silk screen printing on the first conductive material by using a squeezer, the surface of the first conductive material is protected from being damaged, thereby making the heating efficiency of the conductive material uniform.

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  • Resistance Heating (AREA)
  • Surface Heating Bodies (AREA)

Abstract

La présente invention concerne un corps chauffant par la surface à base de matériau conducteur. Selon la présente invention, les pièces d'électrification principales (1, 1') nécessitant un traitement de surface, tel que plaquage à l'argent ou à l'aluminium ou décapage chimique, sont agencées en direction du centre en partant d'une paroi extérieure ou agencées en convergence sur une pièce centrale, et les pièces d'électrification secondaires très petites (2, 2') mises en divergence en partant des pièces communiquantes principales (1, 1') sont agencées en direction de la paroi extérieure en partant du centre en forme de contour, ce qui améliore considérablement le rendement thermique tout en réduisant les coûts de fabrication par comparaison à la technique conventionnelle. Le matériau conducteur (4) est revêtu et séché sur un substrat qui est un isolateur (3) et ensuite, les pièces d'électrification (1, 2, 2') sont disposées sur le matériau séché, ce qui simplifie le procédé de fabrication et minimise une proportion de défauts.
PCT/KR2002/000775 2001-05-22 2002-04-26 Corps chauffant par la surface a base de materiau conducteur WO2002096158A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2001/27981 2001-05-22
KR1020010027981A KR20020088908A (ko) 2001-05-22 2001-05-22 전도성 물질을 이용한 면상 발열체

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WO2002096158A1 true WO2002096158A1 (fr) 2002-11-28

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CN114013048A (zh) * 2022-01-10 2022-02-08 常州纳捷机电科技有限公司 一种双片料同时布丝方法

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KR100573025B1 (ko) * 2003-09-08 2006-04-24 비엠에스(주) Pcb 발열 회로
KR100678564B1 (ko) * 2004-07-27 2007-02-02 주식회사 제이디텍 면상 발열체
WO2009020804A1 (fr) * 2007-08-06 2009-02-12 Olzak James M Procédé de dépôt de matériau électriquement conducteur sur un substrat
KR101360786B1 (ko) * 2012-05-25 2014-02-12 한국생산기술연구원 발열 효율 및 발열 균일도가 우수한 투명 면상 발열체의 제조방법

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JPH04102599U (ja) * 1991-02-04 1992-09-03 東京コスモス電機株式会社 ミラー用面状発熱体
JPH0513156A (ja) * 1991-07-01 1993-01-22 Tokyo Cosmos Electric Co Ltd 面状発熱体
JPH0714668A (ja) * 1993-06-17 1995-01-17 Yasuzo Imoto 防曇鏡
JPH0864352A (ja) * 1994-08-24 1996-03-08 Tokyo Cosmos Electric Co Ltd ミラー用面状発熱体
JPH09134777A (ja) * 1994-12-07 1997-05-20 Tokyo Cosmos Electric Co Ltd ミラー用面状発熱体

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CN114013048A (zh) * 2022-01-10 2022-02-08 常州纳捷机电科技有限公司 一种双片料同时布丝方法
CN114013048B (zh) * 2022-01-10 2022-04-05 常州纳捷机电科技有限公司 一种双片料同时布丝方法

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