Weak-current heating coiled material and preparation method thereof

Abstract

The invention is applicable to the technical field of building materials, and provides a weak-current heating coiled material and a preparation method thereof.The weak-current heating coiled material comprises a coiled material layer, a carbon paste heating layer, an electrifying layer and an insulating heat-insulating layer which are sequentially arranged from top to bottom; wherein the coiled material layer comprises a PET (Polyethylene Terephthalate) thin film, the surface of the PET thin film is coated with an epoxy resin coating, and the epoxy resin coating is coated with glass fabric. After the product is powered on, the heating function can be rapidly started, the heat energy conversion efficiency is high, efficient utilization of energy is achieved, the advantages of being environmentally friendly and running without noise are achieved, and safe and comfortable heating experience is provided for users.

Description

Technical Field

[0001] The present invention belongs to the technical field of building materials, and particularly relates to a weak-current heating coil and a preparation method thereof. Background Art

[0002] A weak-current heating coil is a special coil, usually used in occasions where heating or heat preservation is required. Especially in a weak-current system, the coil form endows it with certain flexibility, enabling it to adapt to the installation requirements of different shapes and sizes.

[0003] For the existing weak-current heating coils, due to structural limitations, they cannot quickly start the heating function, and the heat energy conversion efficiency is low, making it impossible to achieve efficient utilization of energy and affecting the user's heating experience. Therefore, in view of the above situation, there is an urgent need to develop a weak-current heating coil to overcome the deficiencies in current practical applications. Summary of the Invention

[0004] The purpose of the present invention is to provide a weak-current heating coil and a preparation method thereof, aiming to solve the problems mentioned in the above background art.

[0005] The present invention is realized as follows: A weak-current heating coil includes a coil layer, a carbon paste heating layer, a power-on layer, and an insulating and heat-insulating layer arranged in sequence from top to bottom; Among them, the coil layer includes a PET film, an epoxy resin coating is coated on the surface of the PET film, and a fiberglass cloth is covered on the epoxy resin coating.

[0006] In a further technical solution, two layers of epoxy resin coatings are coated on the surface of the PET film. First, the first layer of epoxy resin coating is coated and then cured, and then the second layer of epoxy resin coating is coated, and fixed together with the fiberglass cloth.

[0007] In a further technical solution, both curing processes are carried out in an oven at 120°C for 60 minutes.

[0008] In a further technical solution, the fiberglass cloth adopts an electronic-grade fiberglass cloth.

[0009] In a further technical solution, the carbon paste heating layer adopts a graphene conductive ink coating, and the coil layer coated with the graphene conductive ink coating is cured in an oven at 150°C for 60 minutes.

[0010] In a further technical solution, the power-on layer is made of copper foil or aluminum foil material, and a silver paste coating is coated on the copper foil or aluminum foil, and cured in an oven at 150°C for 50 minutes.

[0011] Further technical solution: the insulation and heat insulation layer is made of Oxford cloth; the surface of the energized layer is coated with an epoxy resin coating, and the Oxford cloth is attached to the epoxy resin coating on the surface of the energized layer and cured in an oven at 120 °C for 60 minutes.

[0012] Further technical solution: the thickness of the coil material is ≥ 1.3 mm, the width is 1.25 - 1.5 m, the length is ≥ 1 m, and it is powered by 36V.

[0013] Another object of the present invention is a preparation method of a weak-current heating coil material, comprising the following steps: Step 1: Uniformly coat a layer of epoxy resin on the surface of the PET film, and then send the film into an oven set at 120 °C for 60 minutes of primary curing treatment. Step 2: On the above-mentioned cured epoxy resin coating, uniformly coat another layer of epoxy resin and attach a fiberglass cloth; then, the entire combination enters the 120 °C oven again for 60 minutes of secondary curing. Step 3: Uniformly print a layer of graphene conductive ink on the surface of the cured fiberglass cloth; then, place the product in an oven at 150 °C for 60 minutes of curing treatment. Step 4: On the graphene conductive ink layer, lay a conductive copper foil and cover it with a silver paste coating; then, the entire structure is placed in an oven at 150 °C again for 50 minutes of curing treatment. Step 5: On the conductive copper foil and the silver paste coating, coat a layer of epoxy resin and attach an Oxford cloth; then, the entire structure is placed in an oven at 120 °C for 60 minutes of final curing; after curing is completed, perform quality inspection, and then perform winding treatment to obtain the weak-current heating coil material product.

[0014] A weak-current heating coil material and a preparation method provided by the present invention have the following beneficial effects: After the product is powered on, it can quickly start the heating function, has a high heat energy conversion efficiency, realizes the efficient utilization of energy, and also has the advantages of being green, environmentally friendly and operating without noise, providing users with a safe and comfortable heating experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a weak-current heating coil material and a preparation method provided by an embodiment of the present invention.

[0016] In the figure: 1 - coil material layer, 2 - carbon paste heating layer, 3 - energized layer, 4 - insulation and heat insulation layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0019] As Figure 1 shown, a weak-current heating coil provided by an embodiment of the present invention is composed of a multi-layer structure, including a coil layer 1, a carbon paste heating layer 2, a power-on layer 3, and an insulating and heat-insulating layer 4 arranged in sequence from top to bottom.

[0020] Among them, the coil layer 1 includes a PET film, an epoxy resin coating is coated on the surface of the PET film, and a fiberglass cloth is covered on the epoxy resin coating.

[0021] PET, the full name is polyethylene terephthalate, is a thermoplastic polyester material with excellent physical properties, chemical stability and electrical insulation, and at the same time has good transparency and processing performance.

[0022] The epoxy resin coating is a widely used protective and decorative material, mainly composed of epoxy resin and its curing agent, and forms a hard, wear-resistant and corrosion-resistant coating after being coated on the surface of the substrate and cured.

[0023] The fiberglass cloth, also known as fiberglass geotextile, is a geosynthetic material composed of composite materials such as glass fibers and short-staple needle-punched non-woven fabrics. It is widely used in many fields such as civil engineering, construction, transportation, petrochemical industry, and machinery.

[0024] As a preferred embodiment of the present invention, two layers of epoxy resin coatings are coated on the surface of the PET film, and after the first layer of epoxy resin coating is pre-coated and cured, the second layer of epoxy resin coating is then coated, and fixed together with the fiberglass cloth.

[0025] As a preferred embodiment of the present invention, both curing processes are carried out in an oven at 120 °C for 60 minutes.

[0026] As a preferred embodiment of the present invention, the fiberglass cloth uses an electronic-grade fiberglass cloth, which is a cloth product made of electronic-grade glass fiber yarns, and has significant advantages such as high modulus, high strength, insulation, heat resistance, and aging resistance. It is an important raw material for the manufacture of electronic components.

[0027] As a preferred embodiment of the present invention, the carbon paste heating layer 2 uses a graphene conductive ink coating, and the coil layer 1 coated with the graphene conductive ink coating is cured in an oven at 150 °C for 60 minutes.

[0028] The graphene conductive ink coating mainly uses an inorganic high-temperature binder as the film-forming substance, adds graphene as the conductive heating medium, and is supplemented with a small amount of auxiliary materials. It is prepared by dispersion and is suitable for various construction processes such as screen printing and spraying. It can be constructed on various substrates such as metals, glass, ceramics, and mica sheets. Through the high-temperature welding mechanism, conductive heating coatings, electromagnetic shielding coatings, conductive coatings, and heat-conducting coatings are made.

[0029] As a preferred embodiment of the present invention, the energized layer 3 is made of copper foil or aluminum foil material, and a silver paste coating is coated on the copper foil or aluminum foil, and is cured in an oven at 150 °C for 50 minutes.

[0030] As a preferred embodiment of the present invention, the insulating and heat-insulating layer 4 uses Oxford cloth; an epoxy resin coating is coated on the surface of the energized layer 3, and the Oxford cloth is attached to the epoxy resin coating on the surface of the energized layer 3 and cured in an oven at 120 °C for 60 minutes.

[0031] As a preferred embodiment of the present invention, the thickness of the coil is ≥1.3 mm, the width is 1.25 - 1.5 m, the length is ≥1 m, and it is powered by 36V.

[0032] As Figure 1 shown, an embodiment of the present invention also provides a preparation method for a low-voltage heating coil, including the following steps: Step 1: Uniformly coat a layer of epoxy resin on the surface of the PET film, and then send the film into an oven set at 120 °C for 60 minutes of primary curing treatment to ensure that the epoxy resin coating firmly adheres to the PET film and forms a stable base structure; Step 2: On the above-mentioned cured epoxy resin coating, uniformly coat another layer of epoxy resin and attach a fiberglass cloth to enhance the strength and toughness of the overall structure. Subsequently, the entire assembly enters the 120 °C oven again for 60 minutes of secondary curing to closely combine the fiberglass cloth with the epoxy resin coating and form a solid intermediate layer; Step 3: On the surface of the cured fiberglass cloth, uniformly print a layer of graphene conductive ink using precision printing technology to construct an efficient conductive network. Subsequently, the product is placed in an oven at 150 °C for 60 minutes of curing treatment to ensure that the graphene conductive ink layer is fully dried and forms good electrical conductivity; Step 4: On the graphene conductive ink layer, lay a conductive copper foil and cover a layer of silver paste coating to enhance the current transmission efficiency and stability. Then, the entire structure is placed in an oven at 150 °C again for 50 minutes of curing treatment to quickly stabilize the silver paste coating and promote its close combination with the copper foil and the lower layer; Step 5: Coat a layer of epoxy resin on the conductive copper foil and silver paste coating as a protective layer, which not only protects the internal conductive structure from the external environment but also improves the overall durability of the coil. Subsequently, bond the Oxford cloth as the outer protective material and place it in an oven at 120 °C for 60 minutes of final curing. After curing, conduct strict quality inspection. After confirmation, perform the winding process to finally obtain a weak-current heating coil product with excellent performance.

[0033] In the above embodiments of the present invention, a weak-current heating coil and a preparation method are provided. After the product is connected to a 36V safety voltage, it can quickly start the heating function in just 3 to 5 minutes, and the heat energy conversion efficiency is as high as 95%, realizing the efficient utilization of energy. For a typical room of 100 square meters with a floor height of about 3 meters, using the coil of the present invention for heating can create a warm and comfortable indoor environment in only about 2 hours.

[0034] More notably, the weak-current heating coil of the present invention not only has excellent performance but also has the advantages of being green, environmentally friendly, and operating without noise, providing users with a safe and comfortable heating experience. This characteristic makes it have broad application prospects in multiple fields, including but not limited to modern home decoration, energy-saving renovation of enterprise and institution office buildings, creation of comfortable environments in public spaces such as schools and nursing homes, precise temperature control requirements in hospitals and high-end laboratories, and strict temperature control standards in professional occasions such as purification and constant temperature workshops.

[0035] In addition, the control, model, and circuit connection of each component are not specifically limited and can be flexibly set in actual applications.

[0036] The circuits, electronic components, and modules involved are all prior arts and can be fully realized by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to software and methods.

[0037] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should be considered as the scope described in this specification.

[0038] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. A weak current heating coil, characterized in that: It comprises a coiled material layer (1), a carbon slurry heating layer (2), a power-carrying layer (3) and an insulating and heat-insulating layer (4) which are arranged in sequence from top to bottom; The coiled material layer (1) comprises a PET film, an epoxy resin coating is coated on the surface of the PET film, and a glass fiber cloth is covered on the epoxy resin coating.

2. The weak current heating coil according to claim 1, characterized in that: The surface of the PET film is coated with two layers of epoxy resin coating, and the first layer of epoxy resin coating is pre-coated and then cured, and then the second layer of epoxy resin coating is coated and fixed together with the glass fiber cloth.

3. The weak current heating coil according to claim 2, characterized in that: Both curing steps were performed in an oven at 120°C for 60 minutes.

4. The weak current heating coil according to claim 2 or 3, characterized in that: The glass fiber cloth is electronic grade glass fiber cloth.

5. The weak current heating coil according to claim 2 or 3, characterized in that: The carbon paste heating layer (2) uses a graphene conductive ink coating, and the coiled material layer (1) coated with the graphene conductive ink coating is cured in an oven at 150° C. for 60 minutes.

6. The weak current heating coil according to claim 5, characterized in that: The conductive layer (3) is made of copper foil or aluminum foil, and a silver paste coating is coated on the copper foil or aluminum foil, and is cured in an oven at 150° C. for 50 minutes.

7. The weak current heating coil according to claim 6, characterized in that: The insulating and heat-insulating layer (4) is made of Oxford cloth; The surface of the conductive layer (3) is coated with an epoxy resin coating, and the Oxford cloth is attached to the epoxy resin coating on the surface of the conductive layer (3) and cured in an oven at 120° C. for 60 minutes.

8. The weak current heating coil according to claim 1, characterized in that: The coil has a thickness of ≥1.3mm, a width of 1.25-1.5m, a length of ≥1m, and is powered by 36V.

9. A method for preparing a weak-current heating coil as claimed in claim 7, characterized in that: The following steps are involved: Step 1: evenly coat a layer of epoxy resin on the surface of the PET film, and then place the film into an oven set at 120° C. for a primary curing treatment for 60 minutes; Step 2: On the cured epoxy resin coating, a layer of epoxy resin is evenly coated again, and the glass fiber cloth is attached; then, the whole assembly is put into a 120°C oven again for 60 minutes of secondary curing; Step 3: Print a layer of graphene conductive ink evenly on the surface of the cured glass fiber cloth; then place the product in an oven at 150°C for 60 minutes of curing; Step 4: Lay conductive copper foil on the graphene conductive ink layer and cover it with a layer of silver paste coating; then, place the entire structure in an oven at 150°C again for 50 minutes of curing; Step 5: Apply a layer of epoxy resin on the conductive copper foil and the silver paste coating, and then attach the Oxford cloth; Afterwards, the entire structure was placed in an oven at 120°C for 60 minutes of final curing; After curing is completed, quality inspection is carried out, and then the coiling process is carried out to obtain the weak current heating coil product.

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