An integral graphene heating plate embedded with a temperature sensor and its processing technology

Abstract

The present application discloses an integral graphene heating plate with an embedded temperature sensor and its processing technology, belonging to the technical field of graphene heating equipment. An integral graphene heating plate with an embedded temperature sensor and its processing technology include a plate body, a control base, a preparation base and a temperature sensing element. It can realize the design of the temperature sensing element inside the plate body, accurately measure the specific temperature after the plate body is heated up, not affected by external factors such as air, and the graphene heating layer is controlled by a controller to stop heating, so that the temperature of the plate body is fixed at the set upper temperature limit, effectively ensuring the accuracy of the set temperature. At the same time, the temperature sensing element is designed inside the plate body, effectively avoiding the damage of the temperature sensing element caused by external impact, thereby preventing the temperature of the plate body from rising without limit, and finally causing problems such as fire or damage to human skin.

Description

Technical Field

[0001] The present invention belongs to the technical field of graphene heating equipment, and more specifically, relates to a whole-plate graphene heating plate with a built-in temperature sensor and a processing technology thereof. Background Art

[0002] The household heating panels currently on the market generally use electric heating or water heating. During the heating process, they will produce fan noise, light radiation, wastewater pollution and other negative metabolites that are not conducive to human furniture life.

[0003] Graphene is a new material with carbon atoms connected by sp² hybridization tightly stacked into a single-layer two-dimensional honeycomb lattice structure. Graphene has excellent optical, electrical and mechanical properties, and has important application prospects in materials science, micro-nano processing, energy, biomedicine and drug delivery, and is considered to be a revolutionary material in the future.

[0004] The existing new technology has used graphene as a heating element in household heating equipment, which has a series of advantages such as high heating power, fast heating speed, and heating without noise. However, it uses a method of slotting the aluminum plate and embedding the graphene in the aluminum plate slot to ensure heating. This results in different distances between the end faces of the aluminum plate and the graphene, and the heat transferred by the graphene after being powered on is also different, which ultimately causes the problem that after the objects on both sides are heated at the same time, the objects on both sides cannot be dried at the same time. At the same time, the aluminum plate and the outer covering plate are detachably connected with screws, which is extremely unsightly in appearance, affecting the user's mood and the aesthetics of the furniture environment.

[0005] In order to have the temperature control function, the existing graphene heating plate is equipped with a temperature sensor at the outer end of the plate body. When the temperature of the plate body reaches the upper limit, the temperature sensor will feedback to the controller, and the controller will control the circuit to cut off the power and stop heating. Such a temperature sensor setting may cause the temperature sensor to be damaged by external force, resulting in continuous heating of the plate body and even the possibility of fire. In addition, the temperature sensor set at the outer end is disturbed by the flow of external air and cannot measure the actual temperature of the plate body, and cannot achieve the ideal temperature control effect. Summary of the invention

[0006] 1. Technical issues to be solved

[0007] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide an integral graphene heating plate with an embedded temperature sensor and its processing technology, which can design the temperature sensing element inside the plate body, accurately measure the specific temperature after the plate body is heated, and is not affected by external factors such as air. The controller controls the graphene heating layer to stop heating, fixes the temperature of the plate body at the set upper temperature limit, effectively ensures the accuracy of the set temperature. At the same time, the temperature sensing element is designed inside the plate body, effectively avoiding the damage of the temperature sensing element caused by external impact, thereby preventing the temperature of the plate body from rising without limit, and finally causing problems such as fire or damage to human skin.

[0008] 2. Technical solution

[0009] To solve the above problems, the present invention adopts the following technical solutions.

[0010] An integral graphene heating plate with an embedded temperature sensor and its processing technology, including a plate body 1, a control base 2, a preparatory base 3 and a temperature sensing element 5.

[0011] The plate body 1 includes a decorative layer 101, a heat conduction layer 102, an insulating layer 103, a graphene heating layer 104 and a protective layer 105 stacked in sequence.

[0012] The decorative layer 101, the heat conduction layer 102, the insulating layer 103, the graphene heating layer 104 and the protective layer 105 have the same area and shape.

[0013] The control base 2 and the preparatory base 3 are components with the same external volume and shape. The control base 2 and the preparatory base 3 are respectively detachably connected to both sides of the lower end inside the plate body 1.

[0014] The control base 2 is provided with a controller. The controller is electrically connected to an external power supply and the graphene heating layer 104. The controller can control the on-off state of the electrical circuit between the external power supply and the graphene heating layer 104.

[0015] The preparatory base 3 has the same appearance as the control base 2, ensuring symmetry and aesthetics. When the heating plate is placed against the wall, the overall stability is improved. The preparatory base 3 has a space for placing the controller. Users can determine the location of the controller according to the different positions of the external power supply, effectively improving the ability to adapt to different environments.

[0016] The temperature sensing element 5 is located inside the plate body 1. The temperature sensing element 5 includes a cable 501 and a temperature sensing probe 502.

[0017] The temperature sensing probe 502 is electrically connected to the controller through the cable 501. The temperature sensing probe 502 is used to sense the temperature of the plate body 1.

[0018] The cable 501 is a flexible part, which can effectively ensure that the temperature sensing probe 502 enters the plate body 1.

[0019] Furthermore, the heat-conducting layer 102 is a solid conductor with a thermal conductivity of 150 - 400, such as an aluminum plate. Aluminum materials are easy to process, have low costs, and are easily obtainable.

[0020] Furthermore, a through storage groove 107 is formed at the outer end of the plate body 1. The storage groove 107 is used for placing items to be heated. The storage groove 107 can be used to spread wet towels and other items to be dried.

[0021] Furthermore, a through groove 106 is formed in the inner side wall of the heat-conducting layer 102. The through groove 106 is arranged at an angle of 45° with the bottom end of the heat-conducting layer 102, and the temperature sensing element 5 is embedded in the through groove 106. The temperature sensing element 5 can sense the temperature inside the plate body 1, effectively improving the accuracy of the measured temperature.

[0022] Furthermore, a hollow tube 4 is embedded in the through groove 106. The thickness of the hollow tube 4 is the same as the depth of the through groove 106. The hollow tube 4 is embedded in the through groove 106, and the temperature sensing element 5 is embedded in the hollow tube 4. When the insulating layer and the graphene heating layer are attached to the surface of the heat-conducting layer, it can effectively ensure that no depression occurs, keeping the end face of the plate body flat and beautiful.

[0023] Furthermore, the insulating layer 103 and the graphene heating layer 104 are fixedly connected by a pressing method, the insulating layer 103 and the heat-conducting layer 102 are fixedly connected by a coupling agent, the decorative layer 101 and the heat-conducting layer 102 are fixedly connected by a pressing method, and the protective layer 105 and the graphene heating layer 104 are fixedly connected by a pressing method. It can effectively improve the connection strength between the layers, while reducing the thickness of the overall plate body 1, reducing the occupied indoor space volume, and ensuring the aesthetics.

[0024] Furthermore, the protective layer 105 includes multiple insulating sheets, and the multiple insulating sheets are sequentially stacked and fixedly connected. It can effectively improve the insulation strength of the graphene heating layer 104, effectively avoiding problems such as electric shock injuring the human body or electric leakage burning the material of the plate body 1.

[0025] Furthermore, the graphene heating layer 104 includes two conductive sheets 108 and multiple graphene sheets 109. The multiple graphene sheets 109 are arranged in a horizontal and vertical cross-shaped "well" pattern, effectively ensuring that the heating efficiency is the same everywhere on the plate body 1. The two conductive sheets 108 are respectively fixedly connected to different graphene sheets 109, and both of the two conductive sheets 108 are electrically connected to the control base 2. The conductive sheets 108 serve as the power-on medium, enabling the graphene sheets 109 to generate heat after being powered on.

[0026] Furthermore, the materials of the decorative layer 101, the insulating layer 103, and the protective layer 105 all have a flame retardant rating of UL94-V0. It can effectively ensure that the plate body 1 will not be ignited by external high temperatures or its own high temperatures, causing fires or human injuries.

[0027] Another object of the present invention is to provide a processing technology for an integral graphene heating plate with a temperature sensor embedded therein, comprising the following steps:

[0028] A. Print graphene powder in the form of graphene sheets 109 distributed in a "well" shape on the insulating layer 103, and the graphene sheets 109 in the "well" shape cover the outer end face of the insulating layer 103 completely.

[0029] B. Fix and connect two conductive sheets 108 to different graphene sheets 109 respectively by hot pressing.

[0030] C. Open a through groove 106 on the inner side wall of the heat conduction layer 102. The through groove 106 is arranged at an angle of 45° with the bottom end of the heat conduction layer 102, and the end of the through groove 106 far from the edge of the heat conduction layer 102 is at the center point of the heat conduction layer 102. The setting mode of the through groove 106 will not leave the position of a certain horizontal or vertical graphene sheet 109 empty, effectively ensuring the uniform heating effect of each part of the plate body 1.

[0031] D. Insert the hollow tube 4 into the through groove 106.

[0032] E. Press the decorative layer 101 on the outer end of the heat conduction layer 102, press the insulating layer 103 printed with the graphene heating layer 104 on the inner end of the heat conduction layer 102. The insulating layer 103 is located between the graphene heating layer 104 and the heat conduction layer 102, and press the protective layer 105 on the inner end of the graphene heating layer 104. The pressing conditions are all compound connection at a temperature of 200°C and a pressure of 60 kg / cm².

[0033] F. Insert the temperature sensing element 5 into the hollow tube 4.

[0034] G. Electrically connect the temperature sensing element 5 with the control seat 2.

[0035] H. Removably connect the control seat 2 and the preparation seat 3 to both sides of the lower end part inside the plate body 1 respectively.

[0036] 3. Beneficial effects

[0037] Compared with the prior art, the advantages of the present invention are as follows:

[0038] (1) In this solution, the temperature sensing element is designed inside the plate body. When measuring the temperature of the plate body, it is not affected by factors such as external air flow, effectively ensuring the accuracy of the measured temperature. When the temperature measured by the temperature sensing element reaches the set temperature of the controller, the controller controls the graphene heating layer to stop heating, and the temperature of the plate body no longer rises, effectively ensuring that the maximum temperature of the plate body is the set temperature.

[0039] (2) In this solution, the temperature-sensing element is designed inside the board body, effectively avoiding damage to the temperature-sensing element caused by external impact, thereby preventing the temperature of the board body from rising without limit, and ultimately avoiding problems such as fire or damage to human skin.

[0040] (3) In this solution, a hollow tube is provided in the inlet groove, and the temperature-sensing element is located inside the hollow tube. The end face of the hollow tube is flush with the end face of the heat-conducting layer, effectively ensuring that when the insulating layer and the graphene heating layer are attached to the surface of the heat-conducting layer, no depression occurs, and the end face of the board body remains flat and beautiful.

[0041] (4) The protective layer of this solution includes multiple insulating sheets, which are sequentially stacked and fixedly connected, effectively improving the insulation effect and effectively avoiding problems such as electric shock injury to the human body or leakage current burning the board body material.

[0042] (5) In this solution, the inlet groove is arranged at an angle of 45° with the bottom end of the heat-conducting layer, and the graphene sheets are arranged in a horizontal and vertical cross pattern in a "well" shape. The arrangement of the inlet groove does not leave a gap in the position of a certain horizontal or vertical graphene sheet, effectively ensuring that the heating effect of each part of the graphene heating layer is balanced.

[0043] (6) The fire resistance ratings of the materials of the decorative layer, insulating layer, and protective layer in this solution are all UL94-V0, effectively ensuring that the board body will not be ignited by external high temperature or its own high temperature, causing fire or human injury.

[0044] (7) The decorative layer, heat-conducting layer, graphene heating layer, insulating layer, and protective layer are compounded and connected at a temperature of 200°C and a pressure of 60 kg / cm², effectively ensuring the connection tightness of each layer, improving the connection strength, and at the same time making the overall thickness of the board body thinner, not occupying indoor space and improving the aesthetics. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a three-dimensional structural schematic diagram of the first specific embodiment of the present invention;

[0046] Figure 2 It is a three-dimensional layered structural schematic diagram of the board body of the first specific embodiment of the present invention;

[0047] Figure 3 It is a planar structural schematic diagram after the heat-conducting layer, insulating layer, and graphene heating layer of the first specific embodiment of the present invention are attached;

[0048] Figure 4 It is an exploded schematic diagram of the assembly of the temperature-sensing element, hollow tube, and heat-conducting plate of the first specific embodiment of the present invention;

[0049] Figure 5 It is a planar cross-sectional structural schematic diagram of the idle tube of the first specific embodiment of the present invention;

[0050] Figure 6Schematic three-dimensional structure diagram of the temperature-sensitive element in the first specific embodiment of the present invention;

[0051] Figure 7 Schematic process flow diagram of the processing in the first specific embodiment of the present invention.

[0052] Explanation of the reference numerals in the figure:

[0053] Plate body 1, decorative layer 101, heat-conducting layer 102, insulating layer 103, graphene heating layer 104, protective layer 105, inlet groove 106, storage groove 107, conductive sheet 108, graphene sheet 109, control seat 2, preparatory seat 3, hollow tube 4, temperature-sensitive element 5, cable 501, temperature-sensitive probe 502. Specific implementation mode

[0054] First specific embodiment: Please refer to Figures 1-7 An integral plate-type graphene heating plate with an embedded temperature sensor and its processing technology, including a plate body 1, a control seat 2, a preparatory seat 3 and a temperature-sensitive element 5.

[0055] The plate body 1 includes a decorative layer 101, a heat-conducting layer 102, an insulating layer 103, a graphene heating layer 104 and a protective layer 105 stacked in sequence.

[0056] The decorative layer 101, the heat-conducting layer 102, the insulating layer 103, the graphene heating layer 104 and the protective layer 105 have the same area and shape.

[0057] The control seat 2 and the preparatory seat 3 are components with the same external volume and shape. The control seat 2 and the preparatory seat 3 are respectively detachably connected to both sides of the lower end inside the plate body 1.

[0058] A controller is provided inside the control seat 2. The controller is electrically connected to an external power supply, and the controller is electrically connected to the graphene heating layer 104. The controller can control the on-off state of the electrical circuit between the external power supply and the graphene heating layer 104.

[0059] The preparatory seat 3 has the same appearance as the control seat 2, ensuring symmetry and aesthetics. When the heating plate is placed against the wall, the overall stability is improved. A space for placing the controller is left inside the preparatory seat 3. Users can determine the location of the controller according to the different positions of the external power supply, effectively improving the ability to adapt to different environments.

[0060] The temperature-sensitive element 5 is located inside the plate body 1. The temperature-sensitive element 5 includes a cable 501 and a temperature-sensitive probe 502.

[0061] The temperature-sensitive probe 502 is electrically connected to the controller through the cable 501. The temperature-sensitive probe 502 is used to sense the temperature of the plate body 1.

[0062] The cable 501 is a flexible part, which can effectively ensure that the temperature-sensitive probe 502 enters the plate body 1.

[0063] The heat-conducting layer 102 is an aluminum plate. Aluminum materials are easy to process, have low costs, and are easily obtainable.

[0064] A through storage groove 107 is formed at the outer end of the plate body 1. The storage groove 107 is used for placing items to be heated. Wet towels and other items to be dried can be spread out in the storage groove 107.

[0065] An access groove 106 is formed in the inner side wall of the heat-conducting layer 102. The access groove 106 is arranged at an angle of 45° with the bottom end of the heat-conducting layer 102. The temperature-sensing element 5 is embedded in the access groove 106. The temperature-sensing element 5 can sense the temperature inside the plate body 1, effectively improving the accuracy of the measured temperature.

[0066] A hollow tube 4 is embedded in the access groove 106. The thickness of the hollow tube 4 is the same as the depth of the access groove 106. The hollow tube 4 is embedded in the access groove 106, and the temperature-sensing element 5 is embedded in the hollow tube 4. When the insulating layer and the graphene heating layer are attached to the surface of the heat-conducting layer, it can effectively ensure that no depression occurs, keeping the end face of the plate body flat and beautiful.

[0067] The insulating layer 103 and the graphene heating layer 104 are fixedly connected by a pressing method. The insulating layer 103 and the heat-conducting layer 102 are fixedly connected by a coupling agent. The decorative layer 101 and the heat-conducting layer 102 are fixedly connected by a pressing method. The protective layer 105 and the graphene heating layer 104 are fixedly connected by a pressing method. It can effectively improve the connection strength between the layers, and at the same time reduce the thickness of the overall plate body 1, reduce the occupied indoor space volume, and ensure the aesthetics.

[0068] The protective layer 105 includes five insulating sheets, and the five insulating sheets are sequentially stacked and fixedly connected. It can effectively improve the insulation strength of the graphene heating layer 104, effectively avoiding problems such as electric shock injuring the human body or electric leakage burning the material of the plate body 1.

[0069] The graphene heating layer 104 includes two conductive sheets 108 and multiple graphene sheets 109. The multiple graphene sheets 109 are arranged in a horizontal and vertical cross-shaped "well" pattern, effectively ensuring that the heating efficiency is the same everywhere in the graphene heating layer 104. The two conductive sheets 108 are respectively fixedly connected to different graphene sheets 109, and both of the two conductive sheets 108 are electrically connected to the control base 2. The material of the conductive sheet 108 is copper or copper alloy. The conductive sheet 108 serves as an energizing medium, enabling the graphene sheets 109 to generate heat after being energized.

[0070] The materials of the decorative layer 101, the insulating layer 103, and the protective layer 105 all have a flame retardant rating of UL94-V0. It can effectively ensure that the plate body 1 will not be ignited by external high temperatures or its own high temperatures, causing fires or human injuries.

[0071] Specific Embodiment 2: Different from Specific Embodiment 1, the graphene heating layer 104 includes two conductive sheets 108 and a graphene sheet 109. The graphene sheet 109 is planar and covers the upper end surface of the protective layer 105. Both of the two conductive sheets 108 are fixedly connected to the graphene sheet 109, and both of the two conductive sheets 108 are electrically connected to the control base 2. The material of the conductive sheet 108 is copper or copper alloy. The conductive sheet 108 serves as an energization medium, enabling the graphene sheet 109 to generate heat after being energized. The heat generation points of the plate body 1 are effectively expanded.

Claims

1. An integrated graphene heating plate embedded with a temperature sensor, characterized in that: It includes a plate body (1), a control seat (2), a preparation seat (3) and a temperature sensing element (5); The plate body (1) includes a decorative layer (101), a heat conducting layer (102), an insulating layer (103), a graphene heating layer (104) and a protective layer (105) which are superposed in sequence; The decorative layer (101), the heat conducting layer (102), the insulating layer (103), the graphene heating layer (104) and the protective layer (105) have the same area and shape; The control seat (2) and the preparation seat (3) are components with the same external volume and shape. The control seat (2) and the preparation seat (3) are respectively detachably connected to both sides of the lower end part inside the plate body (1); The control seat (2) is electrically connected to an external power supply; The control seat (2) is electrically connected to the graphene heating layer (104); The temperature sensing element (5) is located inside the plate body (1); The temperature sensing element (5) is electrically connected to the control seat (2); The temperature sensing element (5) is used to sense the temperature of the plate body (1); A through groove (106) is formed in the inner side wall of the heat conducting layer (102). The through groove (106) is arranged at an angle of 45° with the bottom end of the heat conducting layer (102). The temperature sensing element (5) is embedded in the through groove (106); A hollow tube (4) is embedded in the through groove (106). The thickness of the hollow tube (4) is the same as the depth of the through groove (106). The hollow tube (4) is embedded in the through groove (106), and the temperature sensing element (5) is embedded in the hollow tube (4); A controller is arranged in the control seat (2). The controller is electrically connected to an external power supply; the controller is electrically connected to the graphene heating layer (104), and the controller can control the on-off state of the electrical circuit between the external power supply and the graphene heating layer (104).

2. The integral graphene heating plate embedded in the temperature sensor according to claim 1, wherein: The heat conducting layer (102) is a solid conductor with a thermal conductivity of 150 - 400 W / (m·K).

3. The integral graphene heating plate embedded in the temperature sensor according to claim 2, characterized in that: A through storage groove (107) is formed at the outer end of the plate body (1). The storage groove (107) is used to place items to be heated.

4. The integrated graphene heating plate embedded in a temperature sensor according to claim 1, characterized in that: The insulating layer (103) and the graphene heating layer (104) are fixedly connected by a pressing method. The insulating layer (103) and the heat conducting layer (102) are fixedly connected by a coupling agent. The decorative layer (101) and the heat conducting layer (102) are fixedly connected by a pressing method. The protective layer (105) and the graphene heating layer (104) are fixedly connected by a pressing method.

5. The integrated graphene heating plate embedded in the temperature sensor according to claim 4, characterized in that: The protective layer (105) includes multiple insulating sheets which are superposed and fixedly connected in sequence.

6. The integral graphene heating plate embedded in a temperature sensor according to claim 5, characterized in that: The graphene heating layer (104) includes two conductive sheets (108) and multiple graphene sheets (109). The multiple graphene sheets (109) are arranged in a horizontal and vertical cross "well” shape. The two conductive sheets (108) are respectively fixedly connected to different graphene sheets (109), and both of the two conductive sheets (108) are electrically connected to the control seat (2).

7. The integral graphene heating plate embedded in a temperature sensor according to claim 6, characterized in that: The flame retardant grades of the materials of the decorative layer (101), the insulating layer (103) and the protective layer (105) are all UL94-V0.

8. A processing technology for an integral graphene heating plate embedded in a temperature sensor according to any one of claims 1-7, characterized in that: The steps are as follows: A. Print graphene powder in the form of graphene sheets (109) distributed in a "well” shape on the insulating layer (103). The graphene sheets (109) in the "well” shape cover the outer end face of the insulating layer (103); B. Fix and connect two conductive sheets (108) to different graphene sheets (109) respectively by hot pressing. C. Open a through groove (106) on the inner side wall of the heat conduction layer (102). The through groove (106) is arranged at an angle of 45° with the bottom end of the heat conduction layer (102). The end of the through groove (106) far from the edge of the heat conduction layer (102) is at the center point of the heat conduction layer (102). D. Insert the hollow tube (4) into the through groove (106). E. Press and bond the decorative layer (101) on the outer end of the heat conduction layer (102), press and bond the insulating layer (103) printed with the graphene heating layer (104) on the inner end of the heat conduction layer (102). The insulating layer (103) is located between the graphene heating layer (104) and the heat conduction layer (102). Press and bond the protective layer (105) on the inner end of the graphene heating layer (104). The pressing conditions are all composite connection at a temperature of 200 °C and a pressure of 60 kg / cm². F. Insert the temperature sensing element (5) into the hollow tube (4). G. Electrically connect the temperature sensing element (5) to the control base (2). H. Removably connect the control base (2) and the preparation base (3) to both sides of the lower inner part of the plate body (1) respectively.

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