Silica gel heating sheet

Abstract

The utility model provides a silica gel heating sheet, which comprises a first silica gel sheet, a second silica gel sheet, a heating wire, a first metal sheet and a second metal sheet, and is characterized in that the heating wire is arranged between the first silica gel sheet and the second silica gel sheet; the first metal sheet and the second metal sheet are arranged at the two ends of the heating wire respectively and located between the first silica gel sheet and the second silica gel sheet. The first metal sheet and the second metal sheet are respectively provided with a first through hole and a second through hole. According to the silica gel heating sheet, the first metal sheet and the second metal sheet are arranged at the two ends of the heating wire, the first metal sheet and the second metal sheet are located between the first silica gel sheet and the second silica gel sheet, the area of the metal sheets is large, the first metal sheet is provided with the first through hole, and the second metal sheet is provided with the second through hole. And after the first silica gel sheet and the second silica gel sheet are vulcanized, parts flow into the first through hole and the second through hole, so that the tensile strength is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heating sheets, in particular to a silica gel heating sheet. Background Art

[0002] The silica gel heating sheet, namely the silicone rubber heating sheet (heating plate), also known as the silicone rubber heating gasket / electric heating film / electric heating tape / electric heating sheet, oil barrel heater / heating tape / heating plate, etc., has various names. It is composed of two pieces of fiberglass cloth and double-piece pressed silica gel to form a silica gel fiberglass cloth. Since it is a thin sheet product, it has good flexibility, can be in complete close contact with the object to be heated, is flexible, easier to be close to the heating body, and the shape can be designed according to requirements for heating. In this way, heat can be transferred to any place required. Generally, the planar heating body mainly consists of carbon and has been widely used in fields such as the temperature rise of chemical equipment, pipeline anti-freezing, the heat preservation of backup batteries for outdoor equipment, and medical treatment. The existing silica gel heating sheet includes two groups of silica gel layers, two groups of fiberglass layers, and a power cord (or wire). The two groups of silica gel layers are sandwiched between the two groups of fiberglass layers, and a resistance wire (or heating wire) is arranged between the two groups of silica gel layers. Both ends of the resistance wire are provided with connection terminals, and the connection terminals are electrically connected to the wire. Therefore, the existing wire is directly connected to the heating wire through the connection terminals, and the contact area of the connection terminals is small. Therefore, with this connection method, there is a problem that the connection part between the connection terminal and the heating wire is easily broken, affecting the use of the silica gel heating sheet.

[0003] In view of this, the inventor specifically designed a silica gel heating sheet, and this case was thus generated. Content of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the utility model is to provide a silica gel heating sheet. By arranging a first metal sheet and a second metal sheet at both ends of the heating wire to replace the existing connection terminals, and the first metal sheet and the second metal sheet are located between the first silica gel sheet and the second silica gel sheet. Since the area of the metal sheet is large, and through holes are arranged on the metal sheet to further improve the tensile strength, and then the power cord (or wire) is welded to the first metal sheet and the second metal sheet, the disadvantages brought by the current use of connection terminals are overcome.

[0005] According to a silica gel heating sheet provided by the utility model, it includes:

[0006] A first silica gel sheet and a second silica gel sheet;

[0007] A heating wire, and the heating wire is arranged between the first silica gel sheet and the second silica gel sheet;

[0008] A first metal sheet and a second metal sheet, the first metal sheet and the second metal sheet are respectively arranged at both ends of the heating wire and are both located between the first silicone sheet and the second silicone sheet;

[0009] A first through hole and a second through hole are respectively arranged on the first metal sheet and the second metal sheet.

[0010] The silicone heating sheet of the present utility model is provided with a first metal sheet and a second metal sheet at both ends of the heating wire, and the first metal sheet and the second metal sheet are located between the first silicone sheet and the second silicone sheet. Since the area of the metal sheet is large, and at the same time, a first through hole is arranged on the first metal sheet, and a second through hole is arranged on the second metal sheet. After the first silicone sheet and the second silicone sheet are vulcanized, part of it flows into the first through hole and the second through hole, further improving the tensile strength.

[0011] In some embodiments of the present utility model, the first through hole is arranged at a position away from the center of the first metal sheet, and the second through hole is arranged at a position away from the center of the second metal sheet.

[0012] In some embodiments of the present utility model, the structures of the first metal sheet and the second metal sheet are the same, and both are made of copper parts, and the number of the first through hole and the second through hole is at least one.

[0013] In some embodiments of the present utility model, relief holes are arranged on the second silicone sheet corresponding to the first metal sheet and the second metal sheet.

[0014] In some embodiments of the present utility model, the area of the relief hole is smaller than the end face area of the first metal sheet or the second metal sheet, and the relief hole is arranged to avoid the first through hole and the second through hole.

[0015] In some embodiments of the present utility model, the heating wire includes at least one heating filament.

[0016] In some embodiments of the present utility model, the heating wire includes at least two heating filaments and glass fiber filaments, and the heating filaments and the glass fiber filaments are twisted together.

[0017] In some embodiments of the present utility model, it further includes two first wires, and one ends of the two first wires are respectively welded to the first metal sheet and the second metal sheet.

[0018] In some embodiments of the present utility model, it further includes a temperature measuring device, and the temperature measuring device is arranged on one side of the second silicone sheet and away from the first silicone sheet.

[0019] In some embodiments of the present utility model, the temperature measuring device includes a sensor and a second wire connected to the sensor.

[0020] In some embodiments of the present utility model, it further includes a third silicone sheet disposed on the second silicone sheet, and the third silicone sheet covers the inductor and part of the second wire.

[0021] In some embodiments of the present utility model, the first silicone sheet, the second silicone sheet, and the third silicone sheet are all made of semi-cured silicone sheets.

[0022] In some embodiments of the present utility model, a strengthening knot is provided on the second wire, and the strengthening knot is covered by the third silicone sheet. Description of the Drawings

[0023] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0024] Wherein:

[0025] Figure 1 is a schematic structural diagram of the silicone heating sheet of the present utility model;

[0026] Figure 2 is an exploded view of the silicone heating sheet of the present utility model;

[0027] Figure 3 is a partially enlarged view of the silicone heating sheet of the present utility model;

[0028] Figure 4 is a winding schematic diagram of the heating wire of the present utility model;

[0029] Figure 5 is the present utility model Figure 4 of the partially enlarged view;

[0030] Figure 6 is a partial schematic diagram of the multi-strand heating wire of the present utility model;

[0031] Figure 7 is a schematic structural diagram of the temperature measuring device of the present utility model;

[0032] Figure 8 is a schematic diagram of the strengthening knot of the second wire of the present utility model;

[0033] Figure 9 is a reference diagram of the temperature sensing point during the test of the present utility model.

[0034] Label Description:

[0035] 10. First silicone sheet; 20. Second silicone sheet; 21. Avoidance hole; 30. Heating wire; 40. First metal sheet; 41. First through hole; 50. Second metal sheet; 51. Second through hole; 60. First wire; 70. Temperature measuring device; 71. Inductor; 72. Second wire; 80. Third silicone sheet. Detailed implementation mode

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0037] Please refer to Figures 1 to 8 , which is a silicone heating sheet as the best embodiment of the present utility model, including a first silicone sheet 10, a second silicone sheet 20, a heating wire 30, a first metal sheet 40 and a second metal sheet 50. The heating wire 30 is arranged between the first silicone sheet 10 and the second silicone sheet 20; the first metal sheet 40 and the second metal sheet 50 are respectively arranged at both ends of the heating wire 30 and are both located between the first silicone sheet 10 and the second silicone sheet 20; a first through hole 41 and a second through hole 51 are respectively arranged on the first metal sheet 40 and the second metal sheet 50. The silicone heating sheet of the present utility model is provided with the first metal sheet 40 and the second metal sheet 50 at both ends of the heating wire 30, and the first metal sheet 40 and the second metal sheet 50 are located between the first silicone sheet 10 and the second silicone sheet 20. Since the area of the metal sheet is large, and at the same time, the first through hole 41 is arranged on the first metal sheet 40 and the second through hole 51 is arranged on the second metal sheet 50. After the first silicone sheet 10 and the second silicone sheet 20 are vulcanized, part of it flows into the first through hole 41 and the second through hole 51, further improving the tensile strength.

[0038] The first through hole 41 is arranged at a position far from the center of the first metal sheet 40, the second through hole 51 is arranged at a position far from the center of the second metal sheet 50. The structures of the first metal sheet 40 and the second metal sheet 50 are the same, and both are made of copper parts, and the number of the first through hole 41 and the second through hole 51 is at least one. The first silicone sheet 10 and the second silicone sheet 20 are hot-pressed and vulcanized so that part of the silicone flows into the first through hole 41 and the second through hole 51 to improve the tensile property.

[0039] The silicone heating sheet further includes two first wires 60 for electrifying, and one ends of the two first wires 60 are respectively welded to the first metal sheet 40 and the second metal sheet 50.

[0040] Specifically, please refer to Figures 3 to 5, avoidance holes 21 are provided on the second silicone sheet 20 corresponding to the first metal sheet 40 and the second metal sheet 50; the area of the avoidance holes 21 is smaller than the end face area of the first metal sheet 40 or the second metal sheet 50, and the avoidance holes 21 are arranged to avoid the first through hole 41 and the second through hole 51. Preferably, the avoidance holes 21 are located at the central positions of the first metal sheet 40 or the second metal sheet 50. Through the avoidance holes 21, the central positions of the first metal sheet 40 and the second metal sheet 50 will be exposed, facilitating the welding of the first wire 60. Specifically, after arranging the heating wire 30 on the first silicone sheet 10, the second silicone sheet 20 is covered. The avoidance holes 21 correspond to the central positions of the first metal sheet 40 and the second metal sheet 50, and then vulcanization is carried out. After vulcanization, the two first wires 60 pass through the avoidance holes 21 and are respectively welded to the first metal sheet 40 and the second metal sheet 50.

[0041] For details, please refer to Figure 4 、 6 , the heating wire 30 includes at least one heating filament, or a multi-strand heating wire 30 is used (specific reference Figure 6 ). Relatively preferably, a multi-strand heating wire 30 is used. Among them, the multi-strand heating wire 30 uses at least two or more heating filaments, and 2-4 filaments can be used. Preferably, four filaments are used, that is, the heating wire 30 includes at least two heating filaments and glass fiber filaments, and the heating filaments and the glass fiber filaments are twisted together.

[0042] For details, please refer to Figure 2 、 7 , the silicone heating sheet further includes a temperature measuring device 70 for detecting the temperature during the heating process. The temperature measuring device 70 is arranged on the second silicone sheet 20 on the side far from the first silicone sheet 10. The temperature measuring device 70 includes a sensor 71 and a second wire 72 connected to the sensor 71.

[0043] For details, please refer to Figure 1 、 2 , the silicone heating sheet further includes a third silicone sheet 80 arranged on the second silicone sheet 20. The third silicone sheet 80 covers the sensor 71 and part of the second wire 72. The shape of the third silicone sheet 80 is not limited to that shown in the figure, only for covering the sensor 71, etc. The third silicone sheet 80 also covers the exposed first metal sheet 40, the second metal sheet 50 and part of the first wire 60. Specifically, the third silicone sheet 80 is arranged at the corner position of the second silicone sheet 20. The uncovered parts of the two first wires 60 and the second wire 72 are sleeved with fiberglass sleeves. Specifically, the fiberglass sleeves are first sleeved on the outer sides of the first wire 60 and the second wire 72, and the extendable part can reach the second silicone sheet 20, and then part of the fiberglass sleeves are covered by the third silicone sheet 80, which can improve the tensile strength of the fiberglass sleeves. The temperature measuring device 70 uses a platinum thermal resistance (PT10 / PT100 / PT1000).

[0044] For details, please refer toFigure 8 To improve the tensile strength of the temperature measuring device 70, a reinforcing knot is provided on the second wire 72. The reinforcing knot is covered by the third silicone sheet 80. The first wire 60 that is not covered by the third silicone sheet 80 can be bound together with the second wire 72. By providing the reinforcing knot, the first metal sheet 40, and the second metal sheet 50, the tensile strength of the first wire 60 and the second wire 72 is greatly improved. The installation method of the temperature measuring device 70 with a reinforcing knot is as follows: Before installing the temperature measuring device, first make a reinforcing knot, then place the temperature measuring device 70 with the reinforcing knot on the second silicone sheet 20, place silicone raw material in the circle of the reinforcing knot to play a pre-fixing role. After putting on the fiberglass sleeve, then cover it with the third silicone sheet 80, and finally hot press and vulcanize to improve the tensile strength of the fiberglass sleeve. At the same time, combined with the reinforcing knot of the second wire 72 and the settings of the first metal sheet 40 and the second metal sheet 50, the overall tensile strength is greatly improved.

[0045] The first silicone sheet 10, the second silicone sheet 20, and the third silicone sheet 80 in the present utility model are all semi-cured silicone sheets; a back glue layer is further provided on one end surface of the first silicone sheet 10 away from the second silicone sheet 20 to facilitate directly pasting it at the required position.

[0046] Under the conditions of the same voltage and resistance value in the present utility model, the silicone heating sheets of multi-strand wires (taking four heating wires as an example of multi-strand heating wires) and single-strand wires (single heating wire) are respectively powered on for testing. The specific four temperature sensing points are referred to Figure 9 The experimental data after measurement are as shown in Table 1 below:

[0047]

[0048] It can be seen from Table 1 above that in the power-on test, under the conditions of the same voltage and resistance value, the heating temperature of the silicone heating sheet of multi-strand wires is higher than that of the silicone heating sheet of single-strand wires; specifically, when the heating wire is powered on, the temperature rises, the resistance becomes larger, and the power becomes smaller. The single-strand wire has only one resistance wire and needs to bear all the current. The multi-strand wires share the current to each resistance wire in a parallel form, reducing the load of the resistance wire and slowing down the power decline rate.

[0049] In summary, for the silicone heating sheet of the present utility model, the first metal sheet and the second metal sheet are provided at both ends of the heating wire, and the first metal sheet and the second metal sheet are located between the first silicone sheet and the second silicone sheet. Since the area of the metal sheet is large, at the same time, a first through hole is provided on the first metal sheet, and a second through hole is provided on the second metal sheet. After the first silicone sheet and the second silicone sheet are vulcanized, part of it flows into the first through hole and the second through hole, further improving the tensile strength.

[0050] The present utility model has been described exemplarily in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above-mentioned manner. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present utility model, or the concept and technical solution of the present utility model are directly applied to other occasions without improvement, they are all within the protection scope of the present utility model.

Claims

1. A silicone heating sheet, characterized in that, Comprising: A first silicone sheet and a second silicone sheet; A heating wire, which is disposed between the first silicone sheet and the second silicone sheet; A first metal sheet and a second metal sheet, the first metal sheet and the second metal sheet are respectively disposed at both ends of the heating wire and are both located between the first silicone sheet and the second silicone sheet; A first through hole and a second through hole are respectively provided on the first metal sheet and the second metal sheet.

2. The silicone heating sheet according to claim 1, characterized in that, The first through hole is provided at a central position away from the first metal sheet, and the second through hole is provided at a central position away from the second metal sheet.

3. The silicone heating sheet according to claim 1, wherein Avoidance holes are provided on the second silicone sheet corresponding to the first metal sheet and the second metal sheet.

4. The silicone heating sheet according to claim 1, wherein, The heating wire includes at least one heating filament.

5. The silicone heating sheet according to claim 1, wherein, The heating wire includes at least two heating filaments and glass fiber filaments, and the heating filaments and the glass fiber filaments are twisted together.

6. The silicone heating sheet according to claim 1, wherein It further includes two first wires, and one ends of the two first wires are respectively welded to the first metal sheet and the second metal sheet.

7. The silica gel heating sheet according to claim 1, wherein, It further includes a temperature measuring device, which is disposed on the second silicone sheet and on the side away from the first silicone sheet.

8. The silicone heating sheet according to claim 7, characterized in that, The temperature measuring device includes a sensor and a second wire connected to the sensor.

9. The silicone heating sheet according to claim 8, wherein It further includes a third silicone sheet disposed on the second silicone sheet, and the third silicone sheet covers the sensor and part of the second wire.

10. The silicone heating sheet according to claim 9, characterized in that, A strengthening knot is provided on the second wire, and the strengthening knot is covered by the third silicone sheet.

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