Double-group heating circuit heating sheet

Abstract

The utility model provides a heating sheet with double groups of heating circuits, which comprises a bottom film, the upper surface of the bottom film is provided with a front heating component, the lower surface of the bottom film is provided with a back heating component, and the bottom film is provided with circuits. The protection effect can be achieved through the first thermistor and the second thermistor, the first heating bodies and the second heating bodies are arranged in a staggered mode, the heat dissipation area can be increased, the third heating bodies are arranged in an S-shaped bent mode, the heat dissipation area can be further increased, and the heat dissipation efficiency is improved. On-off of the first heating body, the second heating body and the third heating body is respectively controlled through a circuit, front heating, back heating or double-face heating can be selectively controlled, more choices can be provided for users, electronic components can be individually added on the first heating body and the second heating body through arrangement of patch interfaces, and the heating effect is improved. And therefore, different use requirements of users are met.

Description

Technical Field

[0001] The utility model relates to a heating sheet, in particular to a heating sheet with double heating circuits, belonging to the technical field of heating sheets. Background Art

[0002] The heating sheet is a sheet-shaped electric heating element that generates heat. The heating sheet uses the good insulation performance and high temperature resistance of mica board (mica sheet). It uses mica board (sheet) as the skeleton and insulation layer, supplemented by galvanized sheet or stainless steel sheet as support and protection. It can be made into various sheet-shaped heating devices such as plate, sheet, cylinder, cone, tube, circle, etc.

[0003] The heating sheet uses the resistance characteristics of conductive materials. When current passes through, resistance is generated inside the material, which converts electrical energy into heat energy, increasing the surface temperature of the heating sheet. This is a physical phenomenon, that is, when current passes through a conductor, the collision and friction between electrons and ions inside the conductor causes electrical energy to be converted into heat energy. The heating sheet works based on this principle.

[0004] For example, a known Chinese public authorized patent (publication number: CN214627408U) discloses a heating sheet and a heating device, which provides a first gold finger on the heating sheet and quickly plugs the heating sheet into the main control board through the first gold finger. Compared with the traditional welding method, the heating sheet can be quickly assembled and the disassembly of the heating sheet is also convenient.

[0005] For another example, a known Chinese public authorized patent (publication number: CN214338156U) discloses an electrothermal film and an electrothermal device, which connects a thermistor to a heating circuit. When the ambient temperature is within a preset range, current flows through the thermistor normally, and the heating element generates heat under the drive of the circuit in the bottom film. As the temperature rises, the current of the circuit decreases, thereby reducing the heating power of the heating element, which can effectively prevent the temperature from rising too quickly.

[0006] Although the above patent realizes the rapid assembly and temperature control of the heating plate, it still has the following shortcomings:

[0007] The above patents are all single-sided heating sheets, which only dissipate heat on one side during operation and have a limited heat dissipation area. Therefore, their heat conduction efficiency and heating efficiency are low. In working conditions that require a larger heat dissipation area, they cannot meet the user's usage needs. For this reason, a double-group heating circuit heating sheet is proposed. Utility Model Content

[0008] In view of this, the utility model provides a double-group heating circuit heating sheet to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0009] The technical solution of the embodiment of the utility model is implemented as follows: a double-group heating circuit heating sheet includes a bottom film, a front heating component is installed on the upper surface of the bottom film, a back heating component is installed on the lower surface of the bottom film, and a circuit is arranged on the bottom film;

[0010] The front heating component includes a first heating element, a second heating element, a first welding pad, two first thermistors, a connecting seat, a second welding pad and a patch interface;

[0011] The first heating element and the second heating element are both fixedly connected to the upper surface of the base film, the first heating element and the second heating element are both connected to the circuit of the base film, the two first thermistors are both fixedly connected to the upper surface of the base film through the first welding pads, the patch interfaces are respectively arranged on the upper surfaces of the first heating element and the second heating element, and the two second welding pads are both fixedly connected to the upper surface of the connection seat;

[0012] The reverse heating component comprises two third welding plates and a third heating element;

[0013] The third heating element is fixedly connected to the lower surface of the base film through the two third welding pads, and the third heating element is connected to the circuit of the base film.

[0014] Further preferably, the connection seat is fixedly connected to the upper surface of the base film and connected to the circuit inside the base film.

[0015] Further preferably, the first thermistor is connected to the circuits of the first heating element, the second heating element and the base film.

[0016] Further preferably, the first heating element and the second heating element are arranged alternately.

[0017] Further preferably, the reverse heating component further comprises a mounting wire and two second thermistors;

[0018] The two second thermistors are fixedly connected to the lower surface of the base film through the mounting wires and are connected to the third heating element and the circuit inside the base film.

[0019] Further preferably, the base film is made of a flexible material, and the thickness of the base film is less than or equal to 1 mm.

[0020] Further preferably, the first heating element, the second heating element and the third heating element are all made of copper alloy material.

[0021] Further preferably, the first thermistor and the second thermistor are both located in the middle of the base film.

[0022] Since the embodiment of the utility model adopts the above technical scheme, it has the following advantages: when the first heating element, the second heating element and the third heating element of the utility model are working, the current passes through the first thermistor and the second thermistor respectively, and the first thermistor and the second thermistor can play a protective role. The first heating element and the second heating element are staggered to increase the heating area. The third heating element is arranged in an S-shaped bend to further increase the heating area. By controlling the on and off of the first heating element, the second heating element and the third heating element respectively, it is possible to choose to control the front heating, the back heating or the double-sided heating, thereby giving users more options. When heating on both sides, it has a higher heating efficiency. By setting a patch interface, electronic components can be added to the first heating element and the second heating element in a personalized manner, thereby meeting the different usage requirements of users.

[0023] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a structural diagram of the front heating component of the utility model;

[0026] Figure 2 This is a structural diagram of the reverse heating component of the utility model.

[0027] Figure numerals: 100, base film; 101, front heating component; 12, first heating element; 13, second heating element; 14, first welding pad; 15, first thermistor; 16, connecting seat; 17, second welding pad; 18, patch interface; 201, back heating component; 21, third welding pad; 22, mounting line; 24, second thermistor; 25, third heating element. DETAILED DESCRIPTION

[0028] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0029] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0030] like Figure 1-2 As shown, the embodiment of the utility model provides a double-group heating circuit heating sheet, including a base film 100, a front heating component 101 is installed on the upper surface of the base film 100, a back heating component 201 is installed on the lower surface of the base film 100, and a circuit is arranged on the base film 100;

[0031] The front heating component 101 includes a first heating element 12, a second heating element 13, a first welding pad 14, two first thermistors 15, a connecting seat 16, a second welding pad 17 and a patch interface 18;

[0032] The first heating element 12 and the second heating element 13 are both fixedly connected to the upper surface of the bottom film 100, and the first heating element 12 and the second heating element 13 are both connected to the circuit of the bottom film 100. The two first thermistors 15 are both fixedly connected to the upper surface of the bottom film 100 through the first welding pads 14. The patch interfaces 18 are respectively arranged on the upper surfaces of the first heating element 12 and the second heating element 13, and the two second welding pads 17 are both fixedly connected to the upper surface of the connection seat 16.

[0033] The reverse heating component 201 includes two third welding pads 21 and a third heating element 25;

[0034] The third heating element 25 is fixedly connected to the lower surface of the bottom film 100 through two third welding pads 21. The third heating element 25 is connected to the circuit of the bottom film 100. The third heating element 25 is bent in a continuous S shape.

[0035] By arranging heating elements on both sides of the heating sheet, the heating speed can be increased. Due to the higher heating speed, compared with the existing single-sided heating sheet, the heating time of this solution is shorter when heated to the same temperature.

[0036] The formula for the heating power of the heating sheet is as follows:

[0037]

[0038] Among them, R is the resistance of the heating element, U is the voltage across the heating element, and the current can be calculated according to Ohm's law

[0039] In one embodiment, the connection seat 16 is fixedly connected to the upper surface of the base film 100 and connected to the circuit inside the base film 100 . The front heating component 101 can be connected to an external power source through the connection seat 16 .

[0040] In one embodiment, the first thermistor 15 is connected to the circuits of the first heating element 12 , the second heating element 13 and the base film 100 , thereby forming a loop among the first thermistor 15 , the first heating element 12 , the second heating element 13 and the base film 100 .

[0041] In one embodiment, the first heating element 12 and the second heating element 13 are arranged in a staggered manner. The staggered arrangement can increase the heating area and thus improve the heating efficiency.

[0042] In one embodiment, the reverse heating component 201 further includes a mounting wire 22 and two second thermistors 24;

[0043] The two second thermistors 24 are fixedly connected to the lower surface of the bottom film 100 through the mounting wires 22 and connected to the third heating element 25 and the circuit inside the bottom film 100, thereby forming a loop between the second thermistors 24, the third heating element 25 and the bottom film 100;

[0044] The resistance values ​​of the first thermistor 15 and the second thermistor 24 are positively correlated with the temperature, that is, the higher the temperature, the greater the resistance values ​​of the first thermistor 15 and the second thermistor 24.

[0045] In one embodiment, the base film 100 is made of a flexible material, and the thickness of the base film 100 is less than or equal to 1 mm. By using a flexible material, the base film 100 can be made thinner and softer.

[0046] In one embodiment, the first heating element 12, the second heating element 13 and the third heating element 25 are all made of copper alloy material, and the first thermistor 15 and the second thermistor 24 are both located in the middle of the base film 100. The heating circuit can be protected by the first thermistor 15 and the second thermistor 24.

[0047] When the utility model is working: the front heating component 101 is connected to the circuit of the bottom film 100 through the second welding pad 17, and the back heating component 201 is connected to the circuit of the bottom film 100 through the third welding pad 21. The first heating element 12, the second heating element 13 and the third heating element 25 are working, and the current passes through the first thermistor 15 and the second thermistor 24 respectively. As the temperature rises, the current of the circuit decreases to avoid the temperature rising too fast, and then the first thermistor 15 and the second thermistor 24 play a protective role. Since the first heating element 12 and the second heating element 13 are staggered, the heating area can be increased. The third heating element 25 is arranged in an S-shaped bend, which can further increase the heating area. The first heating element 12, the second heating element 13 and the third heating element 25 are controlled by the circuit to be turned on and off respectively, and the front heating, the back heating or the double-sided heating can be selected to control, thereby giving users more selectivity. By setting the patch interface 18, electronic components can be added to the first heating element 12 and the second heating element 13 in a personalized manner, thereby meeting the different usage requirements of users.

[0048] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A double-group heating circuit heating sheet, comprising a bottom film (100), characterized in that: A front heating component (101) is installed on the upper surface of the base film (100), a rear heating component (201) is installed on the lower surface of the base film (100), and a circuit is arranged on the base film (100); The front heating component (101) comprises a first heating element (12), a second heating element (13), a first welding pad (14), two first thermistors (15), a connecting seat (16), a second welding pad (17) and a patch interface (18); The first heating element (12) and the second heating element (13) are both fixedly connected to the upper surface of the base film (100); the first heating element (12) and the second heating element (13) are both connected to the circuit of the base film (100); the two first thermistors (15) are both fixedly connected to the upper surface of the base film (100) via the first welding pads (14); the patch interfaces (18) are respectively arranged on the upper surfaces of the first heating element (12) and the second heating element (13); and the two second welding pads (17) are both fixedly connected to the upper surface of the connection seat (16); The reverse heating component (201) comprises two third welding plates (21) and a third heating element (25); The third heating element (25) is fixedly connected to the lower surface of the base film (100) via the two third welding pads (21), and the third heating element (25) is connected to the circuit of the base film (100).

2. The double-group heating circuit heating sheet according to claim 1, characterized in that: The connection seat (16) is fixedly connected to the upper surface of the base film (100) and is connected to the circuit inside the base film (100).

3. The double-group heating circuit heating sheet according to claim 2, characterized in that: The first thermistor (15) is connected to the circuits of the first heating element (12), the second heating element (13) and the base film (100).

4. The double-group heating circuit heating sheet according to claim 3 is characterized in that: The first heating element (12) and the second heating element (13) are arranged alternately.

5. The double-group heating circuit heating sheet according to claim 3, characterized in that: The reverse heating component (201) further comprises a mounting wire (22) and two second thermistors (24); The two second thermistors (24) are fixedly connected to the lower surface of the base film (100) through the mounting wires (22) and are connected to the third heating element (25) and the circuit inside the base film (100).

6. The double-group heating circuit heating sheet according to claim 5, characterized in that: The base film (100) is made of a flexible material, and the thickness of the base film (100) is less than or equal to 1 mm.

7. The double-group heating circuit heating sheet according to claim 4, characterized in that: The first heating element (12), the second heating element (13) and the third heating element (25) are all made of copper alloy material.

8. The double-group heating circuit heating sheet according to claim 6, characterized in that: The first thermistor (15) and the second thermistor (24) are both located in the middle of the base film (100).

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