Heating structure used in electric heating floor panels

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 particularly to a heat generation structure used for an electric heating floor slab of a building.

Background Art

[0002] In Patent Document 1 and Patent Document 2, a heat generation structure of a typical electric heating floor slab is disclosed. As shown in the cross-sectional view of FIG. 1, such a heat generation structure 1 of an electric heating floor slab includes, in order from bottom to top, 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 heat generating 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 stacked and arranged. Each layer is adhered by an adhesive 6 and fixed by pressing. The electrode 4 is connected to an external power source, and when energized, the electric heating film 3 generates heat.

[0003] The arrangement order is usually to apply the adhesive 6 on the upper surface of the first base material layer 2 and the lower surface of the second base material layer 5, install the electrode 4 on the first surface of the electric heating film 3, adhere the first base material layer 2 to the second surface of the electric heating film 3 with the adhesive 6, and adhere the second base material layer 5 to the first surface of the electric heating film 3 and on the electrode 4 with the adhesive 6. Because the thermal expansion coefficient and cooling contraction coefficient of the heating film 3 and the electrode 4 are different, a slight gap is created between the heating film 3 and the electrode 4, resulting in insufficient close contact between the two. This makes it easy for a short circuit, similar to a poor contact in a circuit, to occur, and sparks may even be generated, 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 [Overview of the project] [Problems that the invention aims to solve]

[0005] The problem that this invention aims to solve is to provide a heating structure for electric heating floor boards that is less prone to poor contact between the heating film and the electrodes, and is therefore safer. [Means for solving the problem]

[0006] The heating structure used in the electric heating floor plate of the present invention includes a first base material layer, an electric heating film, electrodes, and a second base material layer, arranged in order from bottom to top. A first adhesive is applied to the upper surface of the first base material layer, a second adhesive is applied to the 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 is fixed by heat pressing, and the electrodes are connected to an external power supply. When power is applied, the heating film generates heat, and a plurality of holes are provided that penetrate the electrode and the heating film, and by the heat press, the second adhesive flows into the holes of the electrode and the first adhesive flows into the holes of the heating film, and the first adhesive and the second adhesive crosslink with each other and solidify within the holes of the electrode and the heating film, forming a joint, and the joint generates an adhesive force between the first substrate layer and the second substrate layer in a direction that penetrates the heating film and the electrode, causing the electrode and the heating film to come into close contact.

[0007] Alternatively, the heating structure may include a first base material layer, a heating film, electrodes, and a second base material layer, arranged in order from bottom to top, wherein a first adhesive is applied to the upper surface of the first base material layer, a second adhesive is applied to the lower surface of the second base material layer, the electrodes are placed at both ends of the first surface of the heating film, the first base material layer is bonded to the second surface of the heating film by the first adhesive, and the second base material layer is bonded to the first surface of the heating film and the electrodes by the second adhesive, and then bonded and fixed by heat pressing. In both cases, the electrode is connected to an external power source, and when power is applied, the heating film generates heat. Multiple holes are provided in the portion of the heating film corresponding to the electrode. The first adhesive flows into the holes of the heating film by the heat press and adheres to the local surface of the electrode corresponding to the hole. After the first adhesive solidifies, it forms a joint within the hole, and the joint generates an adhesive force between the first substrate layer and the electrode in a direction that penetrates the heating film, causing the electrode to come into close contact with the heating film.

[0008] Alternatively, the heating element includes a first base layer, a heating film, electrodes, and a second base layer, arranged in a stacked manner from bottom to top. The first adhesive is applied to the upper surface of the first base layer, the second adhesive is applied to the lower surface of the second base layer, the electrodes are placed on both ends of the first surface of the heating film, the first base layer is bonded to the second surface of the heating film by the first adhesive, and the second base layer is bonded to the first surface of the heating film and the electrodes by the second adhesive. The heating element is fixed by heat pressing, and the electrodes are connected to an external power source. When power is applied, the heating element generates heat. Multiple holes are provided in the heating element of the film, other than the electrodes, penetrating the first and second surfaces. The heat pressing causes the first and second adhesives to flow into the holes, form crosslinks, and solidify, forming a joint. This joint generates adhesive force between the first and second base layers in a direction penetrating the heating element. [Effects of the Invention]

[0009] According to the present invention, the adhesive generates an adhesive force in a direction that penetrates either the electrode or the heating film, or both. Since this adhesive force can resist external forces that would separate the heating film and the electrode, a tight contact between the heating film and the electrode can always be maintained. This reduces or avoids the occurrence of gaps between them, thereby reducing or avoiding short circuits caused by poor contact between them, and thus improving the safety of the heating structure in use. [Brief explanation of the drawing]

[0010] [Figure 1] This is a cross-sectional view of a conventional heating structure. [Figure 2] This is an exploded perspective view of the heating structure used in an electric heating floor plate, as shown in Example 1 of the present invention. [Figure 3] This is an exploded cross-sectional view of the main part of a heating structure used in an electric heating floor plate, showing Embodiment 1 of the present invention. [Figure 4] This is a cross-sectional view of the main part of a heating structure used in an electric heating floor plate, showing Embodiment 1 of the present invention. [Figure 5] This is a cross-sectional view of the main part of the heating structure used in the electric heating floor panel shown in Example 2 of the present invention. [Figure 6] This is a sectional view of the main part of the heating structure used in the electric heating floor panel shown in Example 2 of the present invention. [Figure 7] This is an exploded cross-sectional view of the main part of the heating structure used in the electric heating floor panel shown in Example 3 of the present invention. [Figure 8] This is a sectional view of the main part of the heating structure used in the electric heating floor panel shown in Example 3 of the present invention. [Figure 9] This is an exploded perspective view of the heating structure used in the electric heating floor panel shown in Example 4 of the present invention. [Figure 10] This is a sectional view of the main part of the heating structure used in the electric heating floor panel shown in Example 4 of the present invention.

Embodiments for Carrying Out the Invention

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

[0012] As shown in FIGS. 2 to 4, the heating structure 10 used in the electric heating floor panel of the present invention includes a first base material layer 11, an electric heating film 20, an electrode 30, and a second base material layer 12, which are stacked in order from bottom to top. Each layer is adhered by an adhesive and fixed by pressing. The electrode 30 is connected to an external power source, and when energized, the electric heating film 20 generates heat.

[0013] In the configuration, the first adhesive 41 is applied to the upper surface of the first base material layer 11, the second adhesive 42 is applied to the lower surface of the second base material layer 12, electrodes 30 are installed at both ends of the first surface 21 of the electrothermal film 20, the first base material layer 11 is adhered to the second surface 22 of the electrothermal film 20 with the first adhesive 41, and the second base material layer 12 is adhered to the first surface 21 of the electrothermal film 20 and on the electrodes 30 with the second adhesive 42. Furthermore, through pressing, adjacent layers and the film are adhered and fixed to each other.

[0014] As the materials of the first base material layer 11 and the second base material layer 12, polyethylene terephthalate (PET) is used, but it is not limited thereto.

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

[0016] The electrothermal film 20 includes, but is not limited to, a fiber cloth capable of conducting electricity and generating heat.

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

[0018] [Example 1] Example 1 is shown in FIGS. 2 to 4.

[0019] In Example 1, a plurality of holes 31 are provided in the electrodes 30. The holes 31 are circular or rectangular.

[0020] In the pressing and fixing process of the heat generating structure 10, the second adhesive 42 melts and flows into the holes 31 of the electrodes 30, and is adhesively bonded to the local surface of the electrothermal film 20 corresponding to the holes 31. The second adhesive 42 forms a joint portion 43 in the holes 31 after solidification. The joint 43 forms an adhesive relationship between the second base material layer 12, the heating film 20, and the inner wall of the hole 31. In other words, the joint 43 generates an adhesive force between the second base material layer 12 and the heating film 20 in a direction that penetrates the electrode 30. This adhesive force also forms a relative tensile force parallel to the axis of the hole 31 between the second base material layer 12 and the heating film 20, and this relative tensile force causes the heating film 20 to come into close contact with the lower surface of the electrode 30, and the second base material layer 12 to come into close contact with the upper surface of the electrode 30.

[0021] As explained in the background technology section, because the thermal expansion coefficient and cooling contraction coefficient of the heating film 20 and the electrode 30 are different, an external force exists that separates them, and a slight gap may form, which can cause problems similar to poor contact in a circuit. On the other hand, with the heating structure 10 used in the electric heating floor plate described above, the adhesive force can resist external forces that separate the electric heating film 20 and the electrode 30, maintaining close contact between the electric heating film 20 and the electrode 30 at all times, reducing or avoiding the occurrence of gaps between them, and thus reducing or avoiding short circuits due to poor contact between them, thereby improving the safety of use of the heating structure 10.

[0022] [Example 2] Example 2 is shown in Figures 5 and 6.

[0023] Multiple holes 23 are provided in the electrode 30 and the heating film 20, corresponding to each other. The holes 23 are circular or rectangular.

[0024] During the press-fixing process, the second adhesive 42 melts and flows into the holes 31 of the electrode 30. The first adhesive 41 also flows into the holes 23 of the heating film 20. The first adhesive 41 and the second adhesive 42 solidify by cross-linking with each other within the multiple pores 23 and 31, forming a joint 43. The joint 43 generates adhesive force between the first base layer 11 and the second base layer 12 in a direction that penetrates the heating film 20 and the electrode 30. This adhesive force creates relative pressure between the first base layer 11 and the second base layer 12 and the electrode 30 and the heating film 20, causing the electrode 30 and the heating film 20 to be in close contact. This resists external forces that would separate the heating film 20 and the electrode 30, reduces or avoids the occurrence of gaps between them, and reduces or avoids short circuits caused by poor contact between them, thereby improving the safety of use of the heating structure 10.

[0025] [Example 3] Figures 7 and 8 show Example 3.

[0026] The heating film 20 is provided with multiple holes 23 in the areas corresponding to the electrodes 30. The holes 23 are circular or rectangular.

[0027] During the press-fixing process, the heating structure 10 is bonded to the local surface of the electrode 30 corresponding to the hole 23 by the first adhesive 41, which melts and flows into the hole 23 of the electric heating film 20. The first adhesive 41 forms a joint 43 within the hole 23 after solidification. The joint 43 generates an adhesive force between the first base material layer 11 and the electrode 30 in a direction that penetrates the heating film 20. This adhesive force also forms a tensile force parallel to the axis of the hole 23 between the first base material layer 11 and the electrode 30, causing the electrode 30 to be in close contact with the heating film 20. This adhesive force can resist the aforementioned external forces that would separate the heating film 20 and the electrode 30, maintaining close contact between the heating film 20 and the electrode 30 at all times, reducing or avoiding the occurrence of gaps between them, and thus reducing or avoiding short circuits due to poor contact between them, thereby improving the safety of use of the heating structure 10.

[0028] [Example 4] Figures 9 and 10 show Example 4.

[0029] Multiple holes 24 are provided in the parts of the heating film 20 where the electrodes 30 are not installed (i.e., parts of the heating film 20 other than the electrodes 30), penetrating the first surface 21 and the second surface 22.

[0030] In the heat-press fixing process, the first adhesive 41 and the second adhesive 42 melt and flow into the hole 24, forming crosslinks and solidifying to form a joint 43.

[0031] The joint 43 generates adhesive force between the first base material layer 11 and the second base material layer 12 in a direction that penetrates the heating film 20.

[0032] The above describes the best embodiment of the present invention and does not limit the scope of the present invention; any changes or modifications that do not depart from the claims are included within the scope of the present invention. [Explanation of symbols]

[0033] 10 Heating 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 floor plate, wherein the heating structure includes a first base material layer, an electric heating film, electrodes, and a second base material layer, arranged in order from bottom to top, wherein a first adhesive is applied to the upper surface of the first base material layer, a second adhesive is applied to the 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 electrodes by the second adhesive, and is bonded and fixed by heat pressing, and the electrodes are connected to an external power source, and when power is applied, the electric heating film generates heat. Multiple holes are provided that penetrate the electrode and the heating film, A heating structure for use in an electric heating floor plate, characterized in that, by the heat press, the second adhesive flows into the holes of the electrode, the first adhesive flows into the holes of the electric heating film, the first adhesive and the second adhesive crosslink with each other and solidify within the holes of the electrode and the electric heating film, forming a joint, the joint generates an adhesive force between the first base layer and the second base layer in a direction penetrating the electric heating film and the electrode, and brings the electrode and the electric heating film into close contact.

2. A heating structure for use in an electric heating floor plate, wherein the heating structure includes a first base material layer, an electric heating film, electrodes, and a second base material layer, arranged in order from bottom to top, wherein a first adhesive is applied to the upper surface of the first base material layer, a second adhesive is applied to the 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 electrodes by the second adhesive, and is bonded and fixed by heat pressing, and the electrodes are connected to an external power source, and when power is applied, the electric heating film generates heat. Multiple holes are provided in the portion of the heating film corresponding to the electrode, A heating structure for use in an electric heating floor plate, characterized in that, by the heat press, the first adhesive flows into the holes of the electric heating film and adheres to the local surface of the electrode corresponding to the holes, after the first adhesive solidifies, a joint is formed in the holes, the joint generates an adhesive force between the first base material layer and the electrode in a direction that penetrates the electric heating film, and the electrode is brought into close contact with the electric heating film.

3. A heating structure for use in an electric heating floor plate, wherein the heating structure includes a first base material layer, an electric heating film, electrodes, and a second base material layer, arranged in order from bottom to top, wherein a first adhesive is applied to the upper surface of the first base material layer, a second adhesive is applied to the 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 electrodes by the second adhesive, and is bonded and fixed by heat pressing, and the electrodes are connected to an external power source, and when power is applied, the electric heating film generates heat. Multiple holes are provided in the portion of the heating film other than the electrodes, penetrating the first surface and the second surface. A heating structure for use in an electric heating floor panel, characterized in that the first adhesive and the second adhesive flow into the hole and solidify by the heat press, forming a joint, and the joint generates adhesive force between the first base layer and the second base layer in a direction that penetrates the electric heating film.

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