Heating structure for electrically heated floor panel

Abstract

To provide a safer heating structure for an electrically heated floor panel in which poor contact between an electric heating film and an electrode is unlikely to occur.SOLUTION: Adhesives 41, 42 are applied to a first substrate layer 11 and a second substrate layer 12, electrodes 30 are installed at both ends of the first surface 21 of an electric heating film 20, the first substrate layer 11 is adhered to the second surface 22 of the electric heating film 20, and the second substrate layer 12 is adhered to the first surface 21 of the electric heating film 20 and onto the electrode 30. The layers are adhesively fixed by pressing, and the electrode 30 is connected to an external power source. When electricity is applied, the electric heating film 20 generates heat, and the adhesives 41, 42 generate an adhesive force in the direction penetrating the electrode 30 and / or the electric heating film 20, bringing the electric heating film 20 and the electrode 30 into close contact.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a floor heating system, and more particularly to a heat generating structure for use in an electrically heated floor panel of a building. [Background technology]

[0002] Patent Documents 1 and 2 disclose a typical heating structure for an electrically heated floor panel. As shown in the cross-sectional view of Figure 1, the heating structure 1 of such an electric heating floor plate is composed of a first base material layer 2 [which can be selected from polyethylene terephthalate (PET) film, polycarbonate (PC) film, polypropylene (PP) film, etc.], an electric heating film 3 [which can be selected from heating materials such as Positive Temperature Coefficient (PTC), carbon fiber cloth, silver paste electric heating film, indium tin oxide electric heating film, etc.], an electrode 4 (copper foil can be selected), and a second base material layer 5 [which can be selected from polyethylene terephthalate (PET) film, polycarbonate (PC) film, polypropylene (PP) film, etc.] which are layered from bottom to top. The layers are bonded together with an adhesive 6 and fixed in place by pressing. The electrodes 4 are connected to an external power source, and when electricity is applied, the electric heating film 3 generates heat.

[0003] The arrangement sequence is usually as follows: adhesive 6 is applied to the upper surface of the first substrate layer 2 and the lower surface of the second substrate layer 5, an electrode 4 is placed on the first surface of the electric heating film 3, the first substrate layer 2 is bonded to the second surface of the electric heating film 3 with adhesive 6, and the second substrate layer 5 is bonded to the first surface of the electric heating film 3 and onto the electrode 4 with adhesive 6. Because the thermal expansion coefficient and cooling contraction coefficient of the electric heating film 3 and the electrode 4 are different, a small gap is formed between the electric heating film 3 and the electrode 4, and the close contact between the two is insufficient, which can easily cause a short circuit similar to a poor contact in a circuit or even the generation of sparks, raising safety concerns. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] People's Republic of China Patent No. 101896013A Specification [Patent Document 2] People's Republic of China Patent No. 104411027A Summary of the Invention [Problem to be solved by the invention]

[0005] The problem to be solved by the present invention is to provide a heating structure for use in an electric heating floor plate which is safer and less susceptible to poor contact between the electric heating film and the electrodes. [Means for solving the problem]

[0006] The heating structure used in the electric heating floorboard of the present invention includes a first base material layer, an electric heating film, an electrode, and a second base material layer, which are arranged in stacked order from bottom to top, a first adhesive is applied to an upper surface of the first base material layer, a second adhesive is applied to a lower surface of the second base material layer, the electrodes are installed at both ends of the first surface of the electric heating film, the first base material layer is bonded to the second surface of the electric heating film by the first adhesive, the second base material layer is bonded to the first surface of the electric heating film and onto the electrode by the second adhesive, and are bonded and fixed by heat pressing, and the electrode is connected to an external power source, When electricity is applied, the electric heating film generates heat, and a plurality of holes are formed that penetrate the film corresponding to the electrodes and the electric heating film. The heat press causes the second adhesive to flow into the holes of the electrodes and the first adhesive to flow into the holes of the electric heating film, and the first adhesive and the second adhesive bridge each other within the holes of the electrodes and the holes of the electric heating film and solidify to form a joint, and the joint generates an adhesive force between the first base material layer and the second base material layer in a direction penetrating the electric heating film and the electrodes, bringing the electrodes and the electric heating film into close contact.

[0007] Alternatively, the heat generating structure includes a first base material layer, an electric heating film, an electrode, and a second base material layer, which are stacked in order from bottom to top, a first adhesive is applied to an upper surface of the first base material layer, a second adhesive is applied to a lower surface of the second base material layer, the electrodes are installed at both ends of the first surface of the electric heating film, the first base material layer is bonded to the second surface of the electric heating film by the first adhesive, and the second base material layer is bonded to the first surface of the electric heating film and onto the electrodes by the second adhesive, and the layers are bonded and fixed by heat pressing. In both cases, the electrodes are connected to an external power source, and when electricity is applied, the electric heating film generates heat. A plurality of holes are provided in the electric heating film at locations corresponding to the electrodes. The heat press causes the first adhesive to flow into the holes in the electric heating film and adhere to the local surface of the electrodes corresponding to the holes. After the first adhesive solidifies, it forms a joint within the hole, and the joint generates an adhesive force between the first base layer and the electrodes in a direction penetrating the electric heating film, bringing the electrodes into close contact with the electric heating film.

[0008] Alternatively, the electric heating film may include a first base material layer, an electric heating film, an electrode, and a second base material layer, which are arranged in order from bottom to top, a first adhesive is applied to an upper surface of the first base material layer, a second adhesive is applied to a lower surface of the second base material layer, the electrodes are provided at both ends of the first surface of the electric heating film, the first base material layer is adhered to the second surface of the electric heating film by the first adhesive, and the second base material layer is adhered to the first surface of the electric heating film and the electrode by the second adhesive, and are bonded and fixed by heat pressing, and the electrode is connected to an external power source. When electricity is applied, the electric heating film generates heat, and a plurality of holes are provided in the electric heating film other than the electrodes, penetrating the first surface and the second surface, and the first adhesive and the second adhesive flow into the holes and form bridges and are solidified by the heat pressing, forming joints, and the joints generate adhesive force between the first base material layer and the second base material layer in a direction penetrating the electric heating film. Effect of the Invention

[0009] According to the present invention, the adhesive generates an adhesive force in a direction penetrating either or both of the electrode and the electric heating film, and this adhesive force can resist an external force that would separate the electric heating film and the electrode, so that the electric heating film and the electrode can always be maintained in close contact, reducing or avoiding the occurrence of gaps between the two, and reducing or avoiding short circuits due to poor contact between the two, thereby improving the safety of the use of the heating structure. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a cross-sectional view of a conventional heat generating structure. [Diagram 2] FIG. 1 is an exploded perspective view of a heat generating structure used in an electrically heated floor plate according to a first embodiment of the present invention. [Diagram 3] FIG. 1 is an exploded cross-sectional view of a main part of a heat generating structure used in an electrically heated floor plate according to a first embodiment of the present invention. [Figure 4] FIG. 1 is a cross-sectional view of a main part of a heat generating structure used in an electrically heated floor plate according to a first embodiment of the present invention. [Diagram 5] FIG. 6 is an exploded cross-sectional view of a main part of a heat generating structure used in an electrically heated floor plate, showing a second embodiment of the present invention. [Figure 6] FIG. 6 is a cross-sectional view of a main part of a heat generating structure used in an electrically heated floor plate, showing a second embodiment of the present invention. [Figure 7] FIG. 11 is an exploded cross-sectional view of a main part of a heat generating structure used in an electrically heated floor plate, showing a third embodiment of the present invention. [Figure 8] FIG. 11 is a cross-sectional view of a main part of a heat generating structure used in an electrically heated floor plate, showing a third embodiment of the present invention. [Figure 9] FIG. 11 is an exploded perspective view of a heat generating structure used in an electrically heated floor plate according to a fourth embodiment of the present invention. [Figure 10] FIG. 11 is a cross-sectional view of a main part of a heat generating structure used in an electrically heated floor plate according to a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. It should be noted in advance that each component shown in the figures is drawn based on the ratio, dimensions, deformation amount, and deviation amount suitable for explanation, and is not drawn based on the actual ratio of the components. In addition, terms indicating directions such as up and down used in the following description are expressed according to the directions shown in the drawings.

[0012] As shown in Figures 2 to 4, the heating structure 10 used in the electric heating floor plate of the present invention includes a first base layer 11, an electric heating film 20, an electrode 30, and a second base layer 12 arranged in stacked order from bottom to top. The layers are bonded together with an adhesive and fixed in place by pressing. The electrodes 30 are connected to an external power source, and when electricity is applied, the electric heating film 20 generates heat.

[0013] In the arrangement, a first adhesive 41 is applied to the upper surface of the first substrate layer 11, a second adhesive 42 is applied to the lower surface of the second substrate layer 12, electrodes 30 are placed at both ends of the first surface 21 of the electric heating film 20, the first substrate layer 11 is adhered to the second surface 22 of the electric heating film 20 with the first adhesive 41, and the second substrate layer 12 is adhered to the first surface 21 of the electric heating film 20 and onto the electrodes 30 with the second adhesive 42. Further, the adjacent layers and the film are bonded and fixed to each other through pressing.

[0014] The material of the first base layer 11 and the second base layer 12 is polyethylene terephthalate (PET), but is not limited to this.

[0015] The electrode 30 is made of, but is not limited to, copper foil, aluminum foil, silver foil, or carbon conductive thin film. The width W of the electrode 30 is greater than 5 mm.

[0016] The electric heating film 20 includes, but is not limited to, a fiber cloth that is electrically conductive and capable of generating heat.

[0017] The first adhesive 41 and the second adhesive 42 use a thermoplastic resin, but are not limited to this.

[0018] [Example 1] Example 1 is shown in FIG. 2 to FIG.

[0019] In the first embodiment, the electrode 30 is provided with a plurality of holes 31. The holes 31 are circular or rectangular.

[0020] In the process of pressing and fixing the heat generating structure 10, the second adhesive 42 melts and flows into the hole 31 of the electrode 30, and is bonded to the local surface of the electric heating film 20 corresponding to the hole 31. After the second adhesive 42 solidifies, it forms a joint 43 in the hole 31. The joint 43 forms an adhesive relationship between the second substrate layer 12, the electric heating film 20, and the inner wall of the hole 31. That is, the joint 43 generates an adhesive force between the second substrate layer 12 and the electric heating film 20 in a direction penetrating the electrode 30. This adhesive force also forms a relative traction force between the second substrate layer 12 and the electric heating film 20 parallel to the axis of the hole 31, and this relative traction force brings the electric heating film 20 into close contact with the lower surface of the electrode 30, and brings the second substrate layer 12 into close contact with the upper surface of the electrode 30.

[0021] As explained in the Background section, because the thermal expansion coefficients and cooling contraction coefficients of the electrothermal film 20 and the electrode 30 are different, an external force will exist that separates them, creating a small gap that can cause problems similar to poor contact in a circuit. On the other hand, in the case of the heating structure 10 used in the above-mentioned electric heating floorboard, the adhesive force can resist external forces that separate the electric heating film 20 and the electrode 30, and constantly maintain close contact between the electric heating film 20 and the electrode 30, reducing or avoiding the occurrence of gaps between the two, and reducing or avoiding short circuits due to poor contact between the two, thereby improving the safety of the use of the heating structure 10.

[0022] [Example 2] 5 and 6 show a second embodiment.

[0023] The electrode 30 and the electrothermal film 20 are provided with a plurality of corresponding through-holes 23. The holes 23 are circular or rectangular.

[0024] In the process of pressing and fixing the heat generating structure 10, the second adhesive 42 melts and flows into the holes 31 of the electrodes 30. Also, the first adhesive 41 flows into the holes 23 of the electric heating film 20. The first adhesive 41 and the second adhesive 42 form bridges with each other in the plurality of holes 23 and 31 and are solidified to form a joint 43 . The joint 43 generates an adhesive force in the first base layer 11 and the second base layer 12 in a direction penetrating the electric heating film 20 and the electrode 30. This adhesive force causes the first base layer 11 and the second base layer 12 to form a relative pressure on the electrode 30 and the electric heating film 20, and brings the electrode 30 and the electric heating film 20 into close contact with each other, thereby resisting an external force that would separate the electric heating film 20 and the electrode 30, reducing or avoiding the occurrence of a gap between them, and reducing or avoiding a short circuit caused by poor contact between them, thereby improving the safety of the heat generating structure 10 in use.

[0025] [Example 3] 7 and 8 show a third embodiment.

[0026] The electric heating film 20 has a plurality of holes 23 formed in the areas corresponding to the electrodes 30. The holes 23 are circular or rectangular.

[0027] In the process of pressing and fixing the heat generating structure 10 , the first adhesive 41 melts and flows into the holes 23 of the electric heating film 20 , and is adhesively bonded to the local surfaces of the electrodes 30 corresponding to the holes 23 . After solidification, the first adhesive 41 forms a joint 43 in the hole 23. The joint 43 generates an adhesive force between the first base layer 11 and the electrode 30 in a direction penetrating the electric heating film 20. The adhesive force also generates a traction force parallel to the axis of the hole 23 between the first base layer 11 and the electrode 30, so that the electrode 30 is in close contact with the electric heating film 20. The adhesive force can resist the above-mentioned external force that separates the electric heating film 20 and the electrode 30, and normally maintains the close contact between the electric heating film 20 and the electrode 30, reducing or avoiding the occurrence of a gap between them, and reducing or avoiding a short circuit caused by poor contact between them, thereby improving the safety of the use of the heating structure 10.

[0028] [Example 4] 9 and 10 show a fourth embodiment.

[0029] A plurality of holes 24 are provided penetrating the first surface 21 and the second surface 22 in a portion of the electric heating film 20 where the electrodes 30 are not provided (ie, a portion of the electric heating film 20 other than the electrodes 30).

[0030] In the process of heat generating structure 10 being fixed by heat press, first adhesive 41 and second adhesive 42 melt and flow into hole 24, form bridges, and solidify to form joints 43.

[0031] The bonding portion 43 generates an adhesive force between the first base material layer 11 and the second base material layer 12 in a direction penetrating the electric heating film 20 .

[0032] The above describes the best mode for carrying out the present invention, and the scope of the present invention is not limited thereto. All changes and modifications that do not depart from the scope of the claims are included within the scope of the present invention. [Explanation of symbols]

[0033] 10 Heat generating structure 11 First base layer 12 Second base layer 20 Electric heating film 21 1st surface 22 Second surface 23 Hole 24 Hole 30 electrodes 31 Hole 41 First Adhesive 42 Second Adhesive 43 Joint

Claims

1. A heating structure for use in an electric heating floorboard, the heating structure including a first base material layer, an electric heating film, an electrode, and a second base material layer, which are stacked in order from bottom to top, a first adhesive is applied to an upper surface of the first base material layer, a second adhesive is applied to a lower surface of the second base material layer, the electrodes are installed at both ends of a first surface of the electric heating film, the first base material layer is bonded to the second surface of the electric heating film by the first adhesive, the second base material layer is bonded to the first surface of the electric heating film and onto the electrode by the second adhesive, and are bonded and fixed by a heat press, and the electrode is connected to an external power source, and when electricity is applied, the electric heating film generates heat, A plurality of through holes are provided corresponding to the electrodes and the electric heating film, A heating structure for an electric heating floor plate, characterized in that the heat press causes the second adhesive to flow into the hole of the electrode and the first adhesive to flow into the hole of the electric heating film, the first adhesive and the second adhesive to form bridges with each other within the hole of the electrode and the hole of the electric heating film and solidify to form a joint, and the joint generates an adhesive force between the first base material layer and the second base material layer in a direction penetrating the electric heating film and the electrode, bringing the electrode and the electric heating film into close contact.

2. A heating structure for use in an electric heating floorboard, the heating structure including a first base material layer, an electric heating film, an electrode, and a second base material layer, which are stacked in order from bottom to top, a first adhesive is applied to an upper surface of the first base material layer, a second adhesive is applied to a lower surface of the second base material layer, the electrodes are installed at both ends of a first surface of the electric heating film, the first base material layer is bonded to the second surface of the electric heating film by the first adhesive, the second base material layer is bonded to the first surface of the electric heating film and onto the electrode by the second adhesive, and are bonded and fixed by a heat press, and the electrode is connected to an external power source, and when electricity is applied, the electric heating film generates heat, A plurality of holes are provided in the electric heating film at locations corresponding to the electrodes, A heating structure for an electric heating floorboard, characterized in that, by the heat pressing, the first adhesive flows into the hole of the electric heating film and is adhered to the local surface of the electrode corresponding to the hole, and after the first adhesive solidifies, it forms a joint within the hole, and the joint generates an adhesive force between the first base layer and the electrode in a direction penetrating the electric heating film, bringing the electrode into close contact with the electric heating film.

3. A heating structure for use in an electric heating floorboard, the heating structure including a first base material layer, an electric heating film, an electrode, and a second base material layer, which are stacked in order from bottom to top, a first adhesive is applied to an upper surface of the first base material layer, a second adhesive is applied to a lower surface of the second base material layer, the electrodes are installed at both ends of a first surface of the electric heating film, the first base material layer is bonded to the second surface of the electric heating film by the first adhesive, the second base material layer is bonded to the first surface of the electric heating film and onto the electrode by the second adhesive, and are bonded and fixed by a heat press, and the electrode is connected to an external power source, and when electricity is applied, the electric heating film generates heat, A plurality of holes are provided in the electric heating film at a portion other than the electrodes, penetrating the first surface and the second surface; A heating structure for use in an electric heating floorboard, characterized in that the heat press causes the first adhesive and the second adhesive to flow into the holes, form cross-links and solidify to form a joint, and the joint generates an adhesive force between the first base material layer and the second base material layer in a direction penetrating the electric heating film.

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