Production process for graphene heat source unit and packaging structure thereof
Patent Information
- Application Number
- PCT/CN2025/140981
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2025-02-21
- Filing Date
- 2025-12-09
- Publication Date
- 2026-08-27
Smart Images
Figure CN2025140981_27082026_PF_FP_ABST
Abstract
Description
A graphene heat source unit manufacturing process and its packaging structure Technical Field
[0001] This invention belongs to the field of kitchen heating appliances technology, and particularly relates to a graphene heat source unit manufacturing process and its packaging structure. Background Technology
[0002] Graphene is a two-dimensional carbon nanomaterial composed of carbon atoms arranged in a hexagonal honeycomb lattice with sp2 hybrid orbitals. It possesses excellent optical, electrical, and mechanical properties, and holds significant application potential in materials science, micro / nano fabrication, energy, biomedicine, and drug delivery. Kitchen heating appliances typically use electromagnetic heating or electric heating elements to bake food. Electromagnetic heating is energy-intensive, while electric heating elements, despite their use, still consume considerable energy. Furthermore, the limited contact area between the electric heating element and the heating plate can lead to uneven heat conduction, resulting in insufficient baking and reduced baking effectiveness. Current technologies utilize graphene coatings and its uniform heating properties to achieve rapid food heating. However, kitchen heating appliances produced using existing methods suffer from uneven heating and slow temperature response. Summary of the Invention
[0003] The purpose of this invention is to provide a graphene heat source unit manufacturing process and its packaging structure, aiming to solve the technical problems of uneven heating and insufficient temperature rise and fall response in existing kitchen heating appliances.
[0004] To achieve the above objectives, this invention provides a graphene heat source unit production process, comprising the following steps: S1: One end of a fiberglass fabric roll is unwound into the reaction chamber of a tube furnace. The gas supply device of the tube furnace outputs Ar, H2, and CH4 gases to the reaction chamber 3, where a chemical reaction occurs to generate graphene, which adheres to the surface of the fiberglass fabric to form a graphene film. Fiberglass fabric is continuously fed into the reaction chamber, ensuring that the entire roll of fiberglass fabric 1 is continuously coated with a graphene film, and then wound up to form a graphene heat source body roll; S2: The graphene heat source body roll is assembled onto an unwinding device and unwound into a dispensing device, which performs multi-point dispensing processing on the surface of the graphene heat source body; S3: After dispensing, the graphene heat source body continues to move into a copper strip attaching device, which attaches copper electrodes to the graphene heat source body; S4: The graphene heat source body continues to move into a scraping device, which applies adhesive to the surface of the graphene heat source body. S5: The graphene heat source body continues to move to the rotary oven for heating, and the heated graphene heat source body is rolled up; S6: The graphene heat source body is cut according to requirements to form independent units with different power, and the edges of the independent units are sealed with glue.
[0005] Preferably, in step S1, the tubular furnace and its reaction chamber are arranged in the manner of an outer tube and an inner tube, the fiberglass fabric is spirally wound on the outer wall of the inner tube, the gas outlet of the gas conveying device is located in the inner tube, a plurality of through holes are opened on the side wall of the inner tube, and the inner tube is sleeved in the outer tube.
[0006] Preferably, in step S1, the tubular furnace is divided into an annealing section and a growth section connected together. The annealing section is located on the feed side of the tubular furnace, and the growth section is located on the discharge side of the tubular furnace. The fiberglass fabric wound on the inner tube passes through the annealing section and the growth section in sequence.
[0007] Preferably, in step S2, the graphene heat source body is adjusted by a correction device to change its lateral position during movement before entering the dispensing device.
[0008] Preferably, in step S2, the dispensing device is a multi-point dispensing machine to complete the multi-point dispensing process on the surface of the graphene heat source body.
[0009] Preferably, in step S3, the copper strip multi-station processing end on the copper strip applicator simultaneously completes the application and cutting of copper strips at multiple corresponding glue points.
[0010] Preferably, in step S4, the upper and lower fabrics of the graphene heat source body are coated with adhesive.
[0011] Preferably, in step S5, the graphene heat source body output from the rotary oven is subjected to a correction process again before being wound up to ensure neat winding.
[0012] Preferably, in step S6, the processed graphene heat source body roll is separated and cut into multiple independent graphene heat source bodies, and then the edges are sealed with adhesive, so that they can be freely combined according to usage requirements.
[0013] The graphene heat source unit manufacturing process and its packaging structure provided in this invention have at least one of the following technical effects: This invention discloses a graphene heat source unit production process. The surface of the fiberglass fabric is pretreated to ensure it is clean and suitable for graphene growth. The fiberglass fabric roll is mounted onto an infeed roller, which is then driven to unwind the fabric into a tube furnace. Simultaneously, a mixed gas of Ar, H2, and CH4 is introduced into the furnace. The Ar, H2, and CH4 mixture reacts, decomposing CH4 at high temperature, allowing for direct CVD growth of graphene on the fiberglass fabric surface. The graphene-coated fiberglass fabric is then moved and wound onto an output roller. The wound graphene heat source unit roll is placed on an unwinding device, which outputs the roll into a dispensing device. This dispensing device has multiple dispensing stations, allowing dispensing at any position on the surface of the graphene heat source unit roll as needed. The resulting graphene... The graphene heat source body roll continues to be fed into the copper strip attaching device. The copper strip attaching device, corresponding to the dispensing station of the dispensing device, attaches the corresponding copper strips, then cuts them to complete the attachment. The graphene heat source body roll with the copper strips attached then enters the scraping device for scraping adhesive on both sides to improve the final heating efficiency, service life, and anti-oxidation and anti-corrosion properties of the graphene heat source body. After adhesive application, the graphene heat source body enters a reflow oven for drying, then is rewound, completing the processing operation. The processed graphene heat source body roll is then separated and cut according to requirements. The edges of each individual graphene heat source body are then sealed with adhesive to protect them and improve overall strength. The independent units of the graphene heat source body produced using this method can be freely combined and assembled according to user needs, effectively improving the processing efficiency of the heat source itself and reducing the overall thickness.
[0014] In another embodiment of the present invention, an encapsulation structure is provided, which is made of the above-mentioned independent units of the graphene heat source body, and further includes external terminals and a substrate protective layer. The external terminals are electrically connected to a plurality of independent units of the graphene heat source body. The external terminals are fixedly installed on the substrate protective layer and penetrate the substrate protective layer. The substrate protective layer is configured to enclose a plurality of independent units of the graphene heat source body.
[0015] The above-mentioned one or more technical solutions of the packaging structure provided in the embodiments of the present invention have at least one of the following technical effects: the packaging structure is made by combining one or more independent units of graphene heat source body produced by the above-mentioned graphene heat source unit production process and then electrically connecting them to external terminals. The external terminals penetrate the substrate protective layer and complete the connection with the external circuit through contact. While realizing the electrical connection between the graphene heat source body located inside the substrate protective layer and the external circuit, it ensures the absolute isolation between the graphene heat source body and the external environment, effectively improving the safety performance of the heating product using the packaging structure. Through the above structural settings, the heat source using the packaging structure of this application can ensure safety performance while also ensuring that the efficiency performance is far higher than that of products on the market. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 is a flowchart of a graphene heat source unit production process provided in an embodiment of the present invention.
[0018] Figure 2 is a cross-sectional view of the packaging structure (basic style) provided in an embodiment of the present invention.
[0019] Figure 3 is a schematic diagram of the process of attaching a graphene film to a roll of fiberglass fabric 1 provided in an embodiment of the present invention.
[0020] Figure 4 is a schematic diagram of the process of applying adhesive, attaching copper strips, and scraping adhesive to the roll of graphene heat source body 10 provided in an embodiment of the present invention.
[0021] In the figure, the following labels are used: 10—Graphene heat source body; 20—Substrate protective layer; 30—External terminal. Detailed Implementation Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in Figures 1 and 2, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.
[0022] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.
[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.
[0024] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.
[0025] In one embodiment of the present invention, as shown in FIG1, a graphene heat source unit production process is provided, comprising the following steps: S1: Referring to FIG3, one end of the fiberglass fabric 1 roll is unwound into the reaction chamber 3 of the tube furnace 2; the gas supply device of the tube furnace 2 inputs Ar, H2 and CH4 gases into the reaction chamber 3, and a chemical reaction occurs to generate graphene, which is then attached to the surface of the fiberglass fabric 1 to form a graphene film; the fiberglass fabric 1 is continuously fed into the reaction chamber 3 so that the entire roll of fiberglass fabric 1 is continuously attached with a graphene film. Wherein, Ar is an inert gas used to maintain the pressure and temperature stability of the reaction chamber; H2 is used to reduce and clean the surface of the metal substrate, promoting the growth of graphene; CH4 is a carbon source, which, after decomposition, provides the carbon atoms required for graphene growth, depositing on the surface of the fiberglass fabric to form a graphene film. After the entire roll of fiberglass fabric 1 is coated with a graphene film, it is wound up to form a roll of graphene heat source body 10. Rolls of different widths can be prepared according to requirements. S2: As shown in Figure 4, the roll of graphene heat source body 10 is assembled onto an unwinding device and then unwound into a dispensing device. The dispensing device performs multi-point dispensing processing on the surface of the graphene heat source body 10 to improve the heat conduction efficiency after copper strip assembly. The dispensing positions can be adjusted according to requirements. S3: After the dispensing processing is completed, the graphene heat source body 10 continues to move into a copper strip attaching device. The copper strip attaching device attaches copper electrodes to the graphene heat source body 10. The copper strip attaching device can attach copper strips of a preset length at each dispensing position. S4: The graphene heat source body 10 continues to move into a scraping device. The scraping device applies adhesive to the surface of the graphene heat source body 10 to enhance the thermal conductivity of the material and provide a protective barrier. S5: The graphene heat source body 10 continues to move to the rotary oven for heating and winding, completing the processing of the fiberglass fabric surface; S6: According to the processing condition of the roll surface and the requirements of the independent unit, the graphene heat source body 10 is cut and separated to obtain the graphene heat source body 10 independent unit, and the cut graphene heat source body unit is edge sealed.
[0026] This invention discloses a graphene heat source unit production process that pre-treats the surface of a fiberglass fabric to ensure its cleanliness and suitability for graphene growth. The fiberglass fabric roll is mounted onto an infeed roller, which is then driven to unwind the fabric into the reaction chamber of a tube furnace. Simultaneously, a mixed gas of Ar, H2, and CH4 is introduced into the reaction chamber. The Ar, H2, and CH4 mixture reacts, and CH4 decomposes at high temperature, directly promoting CVD growth of graphene on the surface of the fiberglass fabric. The graphene-coated fiberglass fabric is then moved and wound onto an output roller, and the wound graphene heat source body 10 roll is placed on an unwinding device. The unwinding device outputs the graphene heat source body 10 roll into a dispensing device. This dispensing device has multiple dispensing stations, allowing for dispensing at any position on the surface of the graphene heat source body 10 roll as needed. After the adhesive dispensing process, the graphene heat source body 10 roll is fed into the copper strip attaching device. The copper strip attaching device, corresponding to the dispensing station of the adhesive dispensing device, attaches the corresponding copper strips and then cuts them to complete the attachment. The graphene heat source body 10 roll with the attached copper strips then enters the adhesive scraping device for adhesive scraping on both sides, improving the final heating efficiency, service life, and anti-oxidation and anti-corrosion properties of the graphene heat source body 10. After adhesive application, the graphene heat source body 10 enters a reflow oven for drying and is then rewound, completing the processing. The processed graphene heat source body 10 is then separated and cut according to requirements. The edges of each individual graphene heat source body 10 are then sealed with adhesive to protect them and improve overall strength. The independent units of the graphene heat source body 10 produced using this method can be freely combined and assembled according to user needs, effectively improving the processing efficiency of the heat source itself and reducing the overall thickness.
[0027] In another embodiment of the present invention, as shown in FIG3, in step S1, the tubular furnace 2 and its reaction chamber 3 are arranged with an outer tube and an inner tube, and the fiberglass fabric is spirally wound on the outer wall of the inner tube. The gas outlet of the gas supply device is located in the inner tube, and several through holes are opened on the side wall of the inner tube. The inner tube is fitted into the outer tube, and during the movement of the fiberglass fabric spirally wound on the inner tube, the mixed gas of Ar, H2, and CH4 reacts on the surface of the fiberglass fabric to form a graphene layer. The spiral winding movement prolongs the residence time of the fiberglass fabric in the tubular furnace and improves the quality of the graphene layer.
[0028] In another embodiment of the present invention, as shown in Figure 3, in step S1, the tube furnace is divided into an interconnected annealing section and a growth section. The annealing section is located on the feed side of the tube furnace, and the growth section is located on the discharge side. Fiberglass fabric wound around the inner tube passes sequentially through the annealing section and the growth section, enabling precise control of the graphene growth process and improving the quality and performance of the graphene. Annealing improves the flatness of the growth substrate, eliminating problems such as step aggregation on the substrate surface and providing a more uniform and stable surface for graphene growth, thus facilitating the growth of high-quality graphene. Annealing optimizes the graphene growth conditions, adjusting the chemical state and surface energy of the growth substrate to better suit graphene growth. This helps control the growth rate, number of layers, and morphology of the graphene, achieving precise control of the graphene growth process. Annealing can also improve the performance of graphene, enhancing its conductivity, heat resistance, and corrosion resistance, enabling it to maintain stable performance even under harsh environments such as high temperature and high pressure.
[0029] In another embodiment of the present invention, as shown in FIG4, in step S2, before the graphene heat source body 10 roll enters the dispensing device, the roll is adjusted by the correction device to adjust the lateral position of the roll during the movement, so as to ensure the accuracy of the point and improve the uniformity of the point on the entire surface of the roll, and ensure the processing quality.
[0030] In another embodiment of the present invention, as shown in FIG4, in step S2, the dispensing device is a multi-point dispensing machine, which can perform multi-point dispensing processing on the surface of the roll of graphene heat source body 10, and adjust the dispensing station according to the requirements to meet the dispensing processing requirements of different specifications.
[0031] In another embodiment of the present invention, as shown in FIG4, in step S3, the copper strip multi-station processing end on the copper strip applicator simultaneously completes the application and cutting of copper strips at multiple corresponding glue points, and performs automated application and cutting of copper strips in conjunction with the glue dispensing process.
[0032] In another embodiment of the present invention, as shown in FIG. 4, in step S4, the top and bottom surfaces of the roll of graphene heat source body 10 are coated with adhesive. This coating process forms an adhesive layer on the surface of the graphene film. This adhesive layer can form good chemical bonds or physical adsorption with the graphene film and other materials, thereby improving their adhesion strength. This is crucial for ensuring the stability and reliability of the graphene heat source material during long-term use. The coating process also forms a protective film on the graphene surface, isolating or reducing the impact of adverse factors on the graphene, thus extending its service life.
[0033] In another embodiment of the present invention, as shown in FIG4, in step S5, the roll of graphene heat source body 10 output from the rotary oven is subjected to correction treatment again, and then rolled up to ensure neat rolling and maintain the flatness of both ends after rolling.
[0034] In another embodiment of the present invention, as shown in FIG4, in step S6, the processed graphene heat source body 10 roll is separated and cut to form multiple independent units of the graphene heat source body 10, and then the edges of the independent units are sealed with adhesive. The specific specifications of the cutting can be selected differently according to the requirements, resulting in independent units of fixed specifications that meet different needs. Then, the independent units are selected and combined according to the specific product requirements to meet the corresponding product requirements.
[0035] Another embodiment of the present invention provides a packaging structure, as shown in FIG4, which is fabricated using the independent units of the graphene heat source body 10 described above. This packaging structure further includes external terminals 30 and a substrate protective layer 20. The external terminals 30 are electrically connected to several independent units of the graphene heat source body 10, and are fixedly mounted on the substrate protective layer 20, penetrating the substrate protective layer 20. The substrate protective layer 20 encapsulates several independent units of the graphene heat source body 10, and a thermally conductive layer and a thermally insulating layer are disposed between the graphene heat source body 10 and the substrate protective layer 20. The graphene heat source body 10 is located between the thermally conductive layer and the thermally insulating layer. The thermally conductive layer improves the efficiency of heat transfer, enabling rapid transfer of heat from the graphene heat source body 10 to the upper substrate protective layer 20 area, ensuring rapid heat dispersion, preventing local overheating, reducing temperature fluctuations, and improving heating efficiency. The heat insulation layer effectively reduces heat loss due to downward transfer from the graphene heat source body 10, allowing heat to concentrate in the area between the graphene heat source body 10 and the upper substrate protective layer 20, thus improving overall energy efficiency. As needed, silicone layers can be placed between the graphene heat source body 10 and the heat insulation layer, and between the graphene heat source body 10 and the thermally conductive layer, to help distribute heat evenly and provide insulation, preventing excessive heat loss and concentrating heat in the heating area, thereby improving heating efficiency. The external terminal 30 is used to connect the graphene heat source body 10 to external wiring. The external terminal 30, together with the substrate protective layer 20 and the space within the substrate protective layer 20, is isolated from the outside.
[0036] The encapsulation structure is made by combining one or more independent units of graphene heat source body 10 produced by the above-mentioned graphene heat source unit production process, and then electrically connecting them to the external terminal 30. The external terminal 30 penetrates the substrate protective layer 20 and completes the connection with the external circuit through contact. This achieves the electrical connection between the graphene heat source body 10 located inside the substrate protective layer 20 and the external circuit, while ensuring the absolute isolation of the graphene heat source body 10 from the external environment. This effectively improves the safety performance of the heating product using the encapsulation structure. Through the above structural settings, the heat source using the encapsulation structure of this application can ensure safety performance while also ensuring that the efficiency performance is far superior to that of products on the market.
[0037] The rest of this embodiment is the same as that in Embodiment 1. Features not explained in this embodiment are explained using the methods in Embodiment 1, and will not be repeated here.
[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A process for producing a graphene heat source unit, characterized by, Includes the following steps: S1: One end of the fiberglass fabric roll is unwound into the reaction chamber of the tube furnace. The gas supply device of the tube furnace outputs Ar, H2 and CH4 gases to the reaction chamber 3, which undergo a chemical reaction to generate graphene, which is then attached to the surface of the fiberglass fabric to form a graphene film. The fiberglass fabric is continuously fed into the reaction chamber, so that the entire roll of fiberglass fabric is continuously attached with a graphene film, and then wound up to form the roll of the graphene heat source body. S2: The graphene heat source body roll is assembled onto the unwinding device, the graphene heat source body is unwound into the dispensing device, and the dispensing device performs multi-point dispensing processing on the surface of the graphene heat source body. S3: After the dispensing process is completed, the graphene heat source body continues to move into the copper strip attaching device, which attaches copper electrodes to the graphene heat source body. S4: The graphene heat source body continues to move into the adhesive scraping device, and the adhesive scraping device applies adhesive to the surface of the graphene heat source body. S5: The graphene heat source body continues to move to the rotary oven for heating, and the heated graphene heat source body is then rolled up. S6: Cut the graphene heat source body according to the requirements to form independent units with different power, and seal the edges of the cut independent units.
2. The graphene heat source unit production process according to claim 1, characterized in that: In step S1, the tubular furnace and the reaction chamber are arranged in the manner of an outer tube and an inner tube. The fiberglass fabric is spirally wound on the outer wall of the inner tube. The gas outlet of the gas conveying device is located in the inner tube. Several through holes are opened on the side wall of the inner tube. The inner tube is sleeved in the outer tube.
3. The graphene heat source unit production process according to claim 2, characterized in that: In step S1, the tubular furnace is divided into an annealing section and a growth section connected to each other. The annealing section is located on the feed side of the tubular furnace, and the growth section is located on the discharge side of the tubular furnace. The fiberglass fabric wound on the inner tube passes through the annealing section and the growth section in sequence.
4. The graphene heat source unit production process according to claim 3, characterized in that: In step S2, the graphene heat source body passes through a correction device to adjust its lateral position during movement before entering the dispensing device.
5. The graphene heat source unit production process according to claim 1, characterized in that: In step S2, the dispensing device is a multi-point dispensing machine, which completes the multi-point dispensing of adhesive on the surface of the graphene heat source body.
6. The graphene heat source unit production process according to claim 1, characterized in that: In step S3, the copper strip multi-station processing end on the copper strip applicator simultaneously completes the application and cutting of copper strips at multiple corresponding glue points.
7. The graphene heat source unit production process according to claim 1, characterized in that: In step S4, the upper and lower fabrics of the graphene heat source body are coated with adhesive.
8. The graphene heat source unit production process according to claim 1, characterized in that: In step S5, the graphene heat source body output from the rotary oven is subjected to another correction process before being wound up to ensure neat winding.
9. The graphene heat source unit production process according to claim 1, characterized in that: In step S6, the processed graphene heat source body roll is separated and cut into multiple independent graphene heat source bodies, and then the edges are sealed with adhesive.
10. A package structure, characterized by: The graphene heat source unit obtained by the graphene heat source unit production process according to any one of claims 1 to 9 is cut into independent units, characterized in that: it further includes external terminals and a substrate protective layer, the external terminals are electrically connected to a plurality of independent units of the graphene heat source body, the external terminals are fixedly installed on the substrate protective layer and penetrate the substrate protective layer, and the substrate protective layer is configured to enclose a plurality of independent units of the graphene heat source body.