CN111396973A - Graphite alkene electric heat is drawn - Google Patents
Graphite alkene electric heat is drawn Download PDFInfo
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- CN111396973A CN111396973A CN202010297175.9A CN202010297175A CN111396973A CN 111396973 A CN111396973 A CN 111396973A CN 202010297175 A CN202010297175 A CN 202010297175A CN 111396973 A CN111396973 A CN 111396973A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D13/00—Electric heating systems
- F24D13/02—Electric heating systems solely using resistance heating, e.g. underfloor heating
- F24D13/022—Electric heating systems solely using resistance heating, e.g. underfloor heating resistances incorporated in construction elements
- F24D13/024—Electric heating systems solely using resistance heating, e.g. underfloor heating resistances incorporated in construction elements in walls, floors, ceilings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C5/00—Processes for producing special ornamental bodies
- B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
- B44C5/0423—Ornamental plaques, e.g. decorative panels, decorative veneers containing fibreglass elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/06—Casings, cover lids or ornamental panels, for radiators
- F24D19/062—Heat reflecting or insulating shields
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1096—Arrangement or mounting of control or safety devices for electric heating systems
Abstract
The invention discloses a graphene electric heating picture which comprises an electric heating picture main body and a frame for fixing the electric heating picture main body, wherein the electric heating picture main body comprises a surface layer decorative picture, a heating body and a heat insulation layer which are sequentially arranged at intervals, and further comprises an infrared enhancement layer, an infrared absorption layer or an infrared reflection layer.
Description
Technical Field
The invention belongs to the field of manufacturing of electric heating products, relates to application of a novel graphene material in the field of electric heating pictures, and particularly relates to a structure and a method for manufacturing a far infrared electric heating picture with double functions of heating and far infrared health care by adopting the novel graphene material.
Background
In recent years, the electric heating technology and the market are rapidly developed, more and more electric heating equipment enters common families particularly under the support of national northern coal-to-electricity policy, the safe and efficient heating requirements of northern families in the heating season are met, and important products and technical support are provided for continuously improving the air quality of northern main cities.
Graphene is a new material of great strategy developed in recent years, has the remarkable advantages of good heat conductivity and good electrical conductivity, and is gradually applied to various electronic products. In the field of electric heating, the graphene also gradually exerts the material advantages thereof, and gradually replaces the traditional carbon crystal heating element in an electric heating element to form the unique technical advantages of the graphene material.
Among all electric heating products, an electric heating picture (heating picture) is a product with great market prospect, because the electric heating picture organically combines heating with home interior decoration, namely, compared with other heating products, the electric heating picture has unique advantages in functionality and aesthetic characteristics. In addition, the electric heating picture does not occupy indoor space, has good far infrared physical therapy characteristic, and is more and more accepted and popular by the market.
At present, graphene electric heating paintings have a ubiquitous problem in the application process, namely the normal thermal radiation efficiency of an electric heating painting decoration layer is not high, so that the body feeling temperature of a human body is obviously reduced after the human body is far away from the electric heating paintings (beyond 1 m), the heating effect of the electric heating paintings is greatly reduced, the experience of the electric heating paintings in heating application is poor, and the large-scale application of the electric heating paintings is limited. The low heat radiation efficiency of the electric heating drawing method has the following two reasons: firstly, because the safety problem is considered, the electric heating picture can not adopt a heating body with high power density, so that the power density of far infrared rays radiated from the picture surface is lower; secondly, in order to ensure the safety of the decorative layer (such as high temperature scald prevention, electric leakage prevention and the like), the electric heating picture on the market is structurally designed, natural isolation is realized between the decorative layer and the heating body through air (as shown in figure 1), and the electric heating picture has good surface insulation and surface overheating prevention performance, so that thermal resistance exists between the heating body and the picture, the energy of the heating body is absorbed by the decorative layer mainly in a thermal radiation mode, and the energy of the heating body cannot be transmitted to the electric heating picture decorative layer in time, so that the problems of temperature rise of the heating body, low far infrared radiation efficiency on the front surface of the decorative layer and.
Disclosure of Invention
The invention aims to provide a graphene electric heating picture and a preparation method thereof, aiming at the technical problems that the energy of a heating body of the existing electric heating picture cannot be transmitted to an electric heating picture decoration layer in time, and the far infrared radiation efficiency of the front surface of the decoration layer is low and the temperature rise speed is slow although the temperature of the heating body is raised.
In order to achieve the purpose of the invention, on one hand, the invention provides a graphene heating picture which comprises an electric heating picture main body and a frame for fixing the electric heating picture main body, wherein the electric heating picture main body comprises a surface layer decorative picture, a heating body and a heat insulation layer which are sequentially arranged at intervals, and the graphene heating picture also comprises an infrared enhancement layer arranged on the heating body and used for increasing the far infrared emission efficiency of the surface of the heating body, and the infrared enhancement layer faces the surface layer decorative picture.
Compared with a heating body surface packaging material, the infrared enhancement layer material is easier to convert energy into far infrared radiation and emit out the heating body, and has higher infrared conversion efficiency. Therefore, the infrared enhancement layer material is coated on the surface of the heating body, so that the far infrared emission efficiency of the heating body can be improved, and the overall far infrared conversion efficiency of the heating picture is improved.
Wherein, the surface decorative picture, the heating element and the heat-insulating layer are arranged at intervals from front to back in sequence.
The surface decorative painting selects high-temperature-resistant canvas or a PET (polyethylene terephthalate) base material, and decorative painting patterns are sprayed and painted on the surface of the base material through a UV (ultraviolet) spray painting machine.
In particular, the decorative painting also comprises a decorative protective layer which is arranged on the surface (namely the side facing the user) of the surface decorative painting and is used for protecting the patterns on the surface of the decorative painting and preventing the decorative painting base material and the patterns from being damaged in the using process.
In particular, the decorative and protective layer is a film made of a UV transparent protective material or a plastic film (e.g. PET film, etc.).
When the base material of the decorative painting is high-temperature resistant canvas, a UV transparent protective material can be selected; when the decorative painting base material is a PET film, the protective layer can be a UV transparent protective material or a plastic film.
The UV transparent protective layer is obtained by spraying UV transparent protective paint on the surface of the decorative picture by adopting a spraying method and then carrying out UV irradiation curing; the plastic protective film can be adhered and covered on the surface of the PET decorative picture substrate through the adhesive, so that the decorative patterns and the substrate are protected.
Wherein, the frame of the fixed electric heating picture main body selects a metal frame with a heat conduction function.
In particular, the frame is an aluminum frame or a copper frame, preferably an aluminum frame.
The heating body comprises two insulation plates which are tightly overlapped together and a graphene heating film arranged between the two insulation plates, and a wiring terminal is further arranged at the edge of one side of the graphene heating film and is used for being electrically connected with an external power supply. After the power is switched on, the graphene heating film generates heat and emits infrared rays and heat.
The wiring terminal is electrically connected with an external power supply through a lead. The terminal described in the present invention generally employs a brazed terminal as is known in the art.
Particularly, a temperature controller is further arranged on a lead wire of the wiring terminal, which is electrically connected with an external power supply, and is used for controlling the on-off of the graphene heating layer and the temperature of the graphene heating layer, so that the use safety of the electric heating picture is improved.
The graphene heating film layer in the middle and the insulating material plates positioned on two sides of the heating film layer are sealed through pressing to form the heating body. And the graphene heating body is provided with a wiring terminal for connecting the electric heating picture temperature controller and an external power supply. After the electric wire plug is connected with an external power supply, the graphene heating layer can be controlled to be electrified through the temperature controller, so that far infrared rays are radiated outwards on the surface of the picture through decoration, and meanwhile, the heating power (electric heating picture temperature) of the electric heating picture can be controlled according to requirements.
Particularly, the heating element is rectangular or square.
The graphene heating film layer is a strip-shaped or thin film with a through hole or a strip-shaped through hole in the middle. The graphene heating film is clamped between two layers of glass fiber plates or insulating plates and is fixed by the adhesive when the graphene heating film is superposed into the heating body.
Besides the above strip-shaped or strip-shaped thin film with a through hole or a strip-shaped through hole in the middle, the graphene heating film known in the art is suitable for the present invention.
In particular, the graphene exothermic film refers to a film containing a graphene material, and includes a film layer containing only a single graphene as an exothermic material, and also includes a mixed exothermic material containing a graphene material, that is, the exothermic material contains one or more of carbon nanotubes, graphene, carbon black, graphite powder, metal nanowires, and resin in addition to the graphene.
In particular, the insulating plate is made of a glass fiber plate, a mica plate, a tempered glass or a ceramic plate, preferably a glass fiber plate or a mica plate.
The graphene heating element is prepared by the following method:
A) forming a graphene-containing slurry layer on the surface of the insulating plate by coating or printing the graphene-containing slurry, and then baking to form a graphene film layer;
B) printing silver paste on the surface of the graphene film layer, overlapping the silver paste and the graphene dry film layer, and then baking to form a silver paste dry film to prepare a silver paste electrode-graphene heating layer-glass fiber board;
C) coating an adhesive on the surface of the second insulating plate, and performing press-fitting treatment on the second insulating plate and the silver paste electrode-graphene heating layer-glass fiber plate prepared in the step B), so that the graphene heating film layer is clamped between the two insulating plates, and meanwhile, corresponding via holes are reserved on the insulating plates corresponding to the positions of the silver paste electrodes and used for connecting the silver paste and leading out an external power line.
Wherein the thickness of the graphene film layer in the step A) is 10-200 μm (preferably 50 μm); the slurry containing the graphene is a slurry containing only a graphene material, or can be a mixed material containing the graphene, and the mixed material further contains one or more of carbon nanotubes, graphite alkyne, carbon black, graphite powder, metal nanowires and resin.
The graphene film can be a film layer made of only graphene materials, or a film layer made of a mixed material containing graphene, wherein the mixed material further contains one or more of carbon nanotubes, graphite alkyne, carbon black, graphite powder, metal nanowires and resin.
The graphene heating film used in the invention can be prepared by coating, screen printing and vapor deposition on the surface of a glass fiber board or an insulating board, and can also be prepared by adopting a graphene heating film disclosed in Chinese patent with the patent number Z L201820042371. X, namely the graphene heating film for the intelligent wearable graphene heating film for clothes, and the graphene heating film is arranged between two glass fiber boards or insulating boards and pressed to form the graphene heating body.
The graphene heating film comprises a base material film, a copper foil circuit board, a graphene film and a protective film which are sequentially overlapped together from bottom to top, and the electric connection points are positioned on two electrodes of the copper foil circuit board. The copper foil circuit board is formed by laminating an ultrathin copper foil on a substrate film and etching a circuit by using a film process, and the two ends of the copper foil circuit board are connected with wiring terminals and are connected with a power supply through a lead so as to work.
In particular, the thickness of the silver colloid dry film in the step B) is 20-30 μm (preferably 25 μm); before the pressing treatment is carried out in the step C), copper sheets with the thickness of 12-500 mu m are respectively placed on the surfaces of the silver pastes at the two through hole positions to serve as wiring terminals, the size of each copper sheet is 3-10mm larger than the diameter of each through hole, and the copper sheets are packaged between two insulating plates after the pressing treatment and used for connecting the silver pastes and leading out an external power line.
The insulating layer is made of a glass fiber-magnesium plate material.
Particularly, the spacing distance between the surface layer decorative picture and the heating body is 3-15mm, preferably 5 mm; the spacing distance between the heating body and the heat-insulating layer is 3-15mm, preferably 5 mm.
The infrared enhancement layer is made of one or more materials of graphite, micro-nano carbon materials, nano silicon powder, metal oxides, silicon oxide, silicon carbide, boron carbide, sodium silicate and aluminum silicate.
Particularly, the micro-nano carbon material is diamond, diamond-like carbon, graphene, graphite alkyne, carbon black or carbon nano tube; the metal oxide is ferric oxide, nickel oxide, chromium oxide, copper oxide, manganese oxide, cobalt oxide or aluminum oxide.
In particular, the infrared enhancement layer is made of silicon carbide, graphene, silicon oxide or graphite.
In particular, the infrared enhancing layer has a thickness of 0.1 to 1000. mu.m, preferably 10 to 300. mu.m, and more preferably 200. mu.m.
Wherein, the infrared enhancement layer is superposed on the surface of the heating element facing to the decorative picture. The infrared enhancement layer is laminated on the surface of the heating body facing one side of the glass fiber board or the insulating board layer of the decorative picture, so that the far infrared emission efficiency of the heating body is enhanced, and the far infrared conversion efficiency of the heating picture is improved.
In particular, the infrared enhancement layer is a thin film layer arranged on the surface of the heating element in one or more modes of printing, spraying, suspension coating, curtain coating, Chemical Vapor Deposition (CVD) method or PVD (evaporation and sputtering).
In particular, the infrared enhancement layer is prepared according to the following method:
a) mixing the infrared enhancement raw material with the adhesive, and uniformly dispersing to prepare enhancement layer slurry;
b) coating the reinforcing layer slurry on the surface of the graphene heating body by adopting a spraying, printing, spin coating, curtain coating or depositing method, then carrying out baking treatment, and curing to form the infrared reinforcing layer.
Wherein, the infrared enhancement raw material in the step a) is selected from one or more of graphite, micro-nano carbon material, nano silicon powder, metal oxide, silicon carbide, boron carbide, sodium silicate and aluminum silicate.
Particularly, the micro-nano carbon material is diamond, diamond-like carbon, graphene, graphite alkyne, carbon black or carbon nano tube; the metal oxide is ferric oxide, nickel oxide, chromium oxide, copper oxide, manganese oxide, cobalt oxide or aluminum oxide.
Particularly, the raw material of the infrared enhancement layer is one or more of silicon carbide, graphene, silicon oxide or graphite.
In particular, the infrared enhancing raw material is selected as a powder having a particle size of 0.1 to 3 μm, preferably 0.1 to 0.5. mu.m.
The adhesive is selected from water-based epoxy resin, water-based acrylic resin or water-based polyurethane, and is preferably water-based epoxy resin.
Particularly, the weight ratio of the infrared enhancement raw material to the adhesive is (10-30): (70-90), preferably 20: 80.
In particular, the viscosity of the reinforcement layer slurry is 1000-.
Particularly, the infrared enhancement raw materials comprise silicon oxide and graphite, and the weight ratio of the silicon oxide to the graphite is 1: 0.5-1.5, preferably 1: 1.
The invention provides a graphene electric heating picture, which comprises an electric heating picture main body and a frame for fixing the electric heating picture main body, wherein the electric heating picture main body comprises a surface layer decorative picture, a heating body and a heat insulation layer which are sequentially arranged at intervals, and the electric heating picture main body also comprises an infrared absorption layer which is arranged on the surface layer decorative picture and is used for absorbing far infrared rays emitted from the heating body and reducing the reflection of the far infrared rays, and the infrared absorption layer faces the heating body.
The infrared absorption layer material can effectively absorb the far infrared rays emitted from the heating body to the decorative picture direction, and reduce the infrared reflectivity. The original decorative picture surface material has infrared reflectivity, can weaken the transfer of energy from the heating element to the decorative picture, reduces the reflection of far infrared rays from the back of the decorative picture back to the heating element, and improves the transfer efficiency of energy from the heating element to the decorative layer.
The infrared absorption layer is made of one or more materials of indium tin oxide, tin antimony oxide, tungsten cesium oxide, tungsten tin oxide, zinc oxide, silicon oxide, aluminum oxide, calcium carbonate, titanium dioxide, wollastonite, silica gel powder, graphite, a micro-nano carbon material, nano silicon powder, melamine, polyphenylene sulfide, boric acid, resin, polyethylene wax, zinc stearate and white oil.
Particularly, the micro-nano carbon material is graphene, graphite alkyne, carbon black or a carbon nano tube; the resin is PP (polypropylene), PET, PC (polychloroprene), ABS (polyacrylonitrile-butadiene-styrene), PMMA (polymethyl methacrylate), PS (polystyrene) or PVC (polyvinyl chloride).
In particular, the infrared absorption layer is made of carbon nanotubes, graphene or zinc oxide material.
In particular, the infrared absorbing layer has a thickness of 0.1 to 1000. mu.m, preferably 50 to 200. mu.m, and more preferably 150. mu.m.
Wherein, the infrared absorption layer is superposed on the surface of the decorative picture facing to the heating element.
Particularly, the infrared absorption layer is a thin film layer arranged on the surface of the decorative picture in one or more modes of printing, spraying, suspension coating, curtain coating, Chemical Vapor Deposition (CVD) method or PVD (evaporation and sputtering).
The infrared absorption layer is prepared by the following method:
i) mixing an infrared absorption raw material with an adhesive, and uniformly dispersing to prepare absorption layer slurry;
and II) coating infrared absorption layer slurry on the back of the surface decorative picture by adopting a spraying, printing, spin coating, curtain coating or depositing method, then carrying out baking treatment, and curing to form the infrared absorption layer.
Wherein, in the step I), the infrared absorption raw material is selected from one or more of indium tin oxide, antimony tin oxide, cesium tungsten oxide, tungsten tin oxide, zinc oxide, silicon oxide, aluminum oxide, calcium carbonate, titanium dioxide, wollastonite, silica gel powder, graphite, a micro-nano carbon material, nano silicon powder, melamine, polyphenylene sulfide, boric acid, resin, polyethylene wax, zinc stearate and white oil.
Particularly, the micro-nano carbon material is graphene, graphite alkyne, carbon black or a carbon nano tube; the resin is PP (polypropylene), PET, PC (polychloroprene), ABS (polyacrylonitrile-butadiene-styrene), PMMA (polymethyl methacrylate), PS (polystyrene) or PVC (polyvinyl chloride).
In particular, the infrared absorption raw material is selected from carbon nano tubes, graphite or zinc oxide.
In particular, the infrared absorbing material is selected from carbon nanotube powder having a particle size of 0.005 to 3 μm, preferably a diameter of 0.005 to 0.05 μm, and a length of 5 to 20 μm; the particle size of the graphene powder is 0.5-3 μm, preferably 0.5-1 μm.
The adhesive is selected from water-based epoxy resin, water-based acrylic resin or water-based polyurethane, and is preferably water-based acrylic resin.
Particularly, the weight ratio of the infrared absorption raw material to the adhesive is (10-30): (70-90), preferably 15: 85.
In particular, the viscosity of the absorber layer slurry is 500-.
The invention further provides a graphene electric heating picture, which comprises an electric heating picture main body and a frame for fixing the electric heating picture main body, wherein the electric heating picture main body comprises a surface layer decorative picture, a heating body and a heat insulation layer which are sequentially arranged at intervals, and the graphene electric heating picture main body also comprises an infrared reflecting layer arranged on the heat insulation layer and used for reflecting far infrared rays emitted from the heating body to the heat insulation layer and reducing heat transfer from the heating body to the heat insulation layer, and the infrared reflecting layer faces towards the heating body.
The infrared reflection layer can reflect far infrared rays, generally comprises the smooth metal material in surface, and the far infrared rays present the mirror reflection on the surface, and the metal material surface is difficult to absorb the infrared ray to can block that the infrared ray is absorbed and transfer to the heat preservation, reduce the heat from the heat-generating body to the efficiency of heat preservation transfer, promote the directional energy transfer efficiency who decorates the drawing direction of heat-generating body.
Wherein, the infrared reflecting layer is a film layer made of one or more materials of aluminum, silver, copper, Polyethylene (PE), glass fiber and PET.
In particular, the thickness of the infrared reflecting layer is 0.1 to 1000. mu.m, preferably 10 to 200. mu.m, and more preferably 100. mu.m.
The infrared reflecting layer is superposed on the surface of the side, facing the heating body, of the heat insulating layer.
Particularly, the infrared reflecting layer is a thin film layer arranged on the surface of the heat preservation layer in one or more modes of printing, spraying, suspension coating, curtain coating, Chemical Vapor Deposition (CVD) method or PVD (evaporation and sputtering).
The invention further provides a graphene electric heating picture, which comprises an electric heating picture main body and a frame for fixing the electric heating picture main body, wherein the electric heating picture main body comprises a surface layer decorative picture, a heating body and a heat preservation layer which are sequentially arranged at intervals, and further comprises an infrared enhancement layer and an infrared absorption layer, wherein: the infrared enhancement layer is arranged on the heating body, faces the surface layer decorative picture and is used for increasing far infrared emission efficiency of the surface of the heating body; the infrared absorption layer is arranged on the surface layer decorative picture and faces the heating body and is used for absorbing far infrared rays emitted from the heating body and reducing reflection of the far infrared rays.
The invention provides a graphene electric heating picture on the other hand, which comprises an electric heating picture main body and a frame for fixing the electric heating picture main body, wherein the electric heating picture main body comprises a surface layer decorative picture, a heating body and a heat insulation layer which are sequentially arranged at intervals, and further comprises an infrared enhancement layer and an infrared reflection layer, wherein: the infrared enhancement layer is arranged on the heating body, faces the surface layer decorative picture and is used for increasing far infrared emission efficiency of the surface of the heating body; the infrared reflection layer is arranged on the heat preservation layer and faces the heating body, and is used for reflecting far infrared rays emitted from the heating body to the heat preservation layer and reducing heat transfer from the heating body to the heat preservation layer.
The invention further provides a graphene electric heating picture, which comprises an electric heating picture main body and a frame for fixing the electric heating picture main body, wherein the electric heating picture main body comprises a surface layer decorative picture, a heating body and a heat insulation layer which are sequentially arranged at intervals, and further comprises an infrared absorption layer and an infrared reflection layer, wherein: the infrared absorption layer is arranged on the surface decorative picture, faces the heating body, and is used for absorbing far infrared rays emitted from the heating body and reducing reflection of the far infrared rays; the infrared reflection layer is arranged on the heat preservation layer and faces the heating body, and is used for reflecting far infrared rays emitted from the heating body to the heat preservation layer and reducing heat transfer from the heating body to the heat preservation layer.
The invention also provides a graphene electric heating picture, which comprises an electric heating picture main body and a frame for fixing the electric heating picture main body, wherein the electric heating picture main body comprises a surface decorative picture, a heating body and a heat preservation layer which are sequentially arranged at intervals, and further comprises an infrared enhancement layer, an infrared absorption layer and an infrared reflection layer, wherein: the infrared enhancement layer is arranged on the heating body, faces the surface layer decorative picture and is used for increasing far infrared emission efficiency of the surface of the heating body; the infrared absorption layer is arranged on the surface decorative picture, faces the heating body, and is used for absorbing far infrared rays emitted from the heating body and reducing reflection of the far infrared rays; the infrared reflection layer is arranged on the heat preservation layer and faces the heating body, and is used for reflecting far infrared rays emitted from the heating body to the heat preservation layer and reducing heat transfer from the heating body to the heat preservation layer.
Compared with the prior art, the invention has the following advantages and benefits:
the invention aims to solve the problem of low normal electric-thermal radiation conversion efficiency of the existing graphene electric heating picture, adopts a method of respectively adding an infrared absorption layer and an infrared emission layer on an electric heating picture decoration layer and a heating body layer, and achieves the following effects:
the method for adding the far infrared absorption layer on the inner surface of the electric heating picture decoration layer and adding the infrared radiation enhancement layer on the side of the heating body pointing to the electric heating picture decoration layer improves the efficiency of transferring infrared radiation energy from the heating body to the electric heating picture decoration layer, thereby improving the far infrared radiation efficiency of the electric heating picture and improving the heating and far infrared physiotherapy effects of the heating picture.
According to the invention, the infrared absorption layer is added on the inner surface of the electric heating picture decoration layer, and the far infrared emission enhancement layer is arranged on the surface of the heating body layer, which is directed to the decoration layer, so that the energy transfer efficiency between the heating body and the decoration layer is increased, and the forward electric heating radiation efficiency of the electric heating picture is effectively improved. The forward electric-thermal radiation conversion efficiency of the electric heating picture is increased, the human body temperature feeling at a longer distance is improved, and the human body far infrared physiotherapy experience is improved; and because the forward electricity-heat radiation conversion efficiency of the electric heating picture is increased, the heating effect of the electric heating picture is improved, and the energy utilization efficiency is improved.
Drawings
Fig. 1 is a schematic cross-sectional view of a conventional graphene electrothermal picture;
FIG. 2 is a schematic cross-sectional structure view of a first embodiment of the graphene electrothermal picture according to the present invention;
FIG. 3 is a schematic cross-sectional structure view of a second embodiment of the graphene electrothermal picture according to the present invention;
FIG. 4 is a schematic cross-sectional structure view of a third embodiment of the graphene electrothermal picture according to the present invention;
FIG. 5 is a schematic cross-sectional structure view of a fourth embodiment of the graphene electrothermal picture according to the present invention;
FIG. 6 is a schematic cross-sectional structure view of a fifth embodiment of the graphene electrothermal picture according to the present invention;
fig. 7 is a schematic cross-sectional structure view of a sixth embodiment of the graphene electrothermal picture according to the present invention.
Description of the reference numerals
1. Electric heating decorative pictures (pattern layers); 2. a decorative painting protective layer; 3. a graphene heating body layer; 4. an infrared reflecting layer; 5. a heat-insulating layer; 6. fixing the frame; 7. an infrared absorbing layer; 8. an infrared enhancement layer.
Detailed Description
The invention will be further described with reference to specific embodiments, and the advantages and features of the invention will become apparent as the description proceeds. These examples are illustrative only and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.
As shown in fig. 2, the graphene electrothermal picture of the present invention includes an electrothermal picture main body and a frame 6 for fixing the electrothermal picture main body, wherein the electrothermal picture main body includes a surface decoration picture 1, a graphene heating element layer 3 and a heat insulation layer 5 which are sequentially arranged from outside to inside at intervals, the decoration picture, the heating element layer and the heat insulation layer are spaced at a certain distance, and the spacing distance between two adjacent layers is 3-15mm (preferably 5mm), wherein: the outer surface (i.e. the side facing the user of the electric heating picture) of the surface layer decorative picture is provided with a decorative picture protective layer 2, and the inner surface facing the heating body is provided with an infrared absorption layer 7; an infrared enhancement layer 8 is arranged on the surface of one side of the heating body layer facing the decorative picture; an infrared reflecting layer 4 is arranged on the surface of one side of the heat preservation layer facing the heating body.
In the description of the present invention, it should be noted that the terms "table", "inside", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and the like indicate the orientation or positional relationship shown when the user of the graphene electro-thermal drawing faces the electro-thermal drawing, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
The fixing frame 6 for fixing the electric heating picture main body is made of metal material aluminum with good heat conducting property, namely an aluminum frame, and other metal frames with good heat conducting property except the aluminum frame are suitable for the electric heating picture main body.
The surface decorative painting 1 is made of high-temperature resistant materials; such as landscape, character or landscape; but also a photograph or other decorative picture.
The decorative painting 1 is made of high-temperature-resistant canvas or PET (polyethylene terephthalate) base materials, and decorative painting patterns are sprayed and painted on the surface of the base materials through a UV (ultraviolet) spray painting machine. Surface finishes known in the art are suitable for use in the present invention.
The decorative painting protective layer 2 is a film or a plastic film made of a UV transparent protective material and arranged on the outer surface (namely, the side facing a user) of the decorative painting, covers the outer surface of the decorative painting, and is used for protecting the patterns on the surface of the decorative painting and preventing the decorative painting base material and the patterns from being damaged in the using process.
When the base material of the decorative painting is high-temperature resistant canvas, a UV transparent protective material can be selected; when the decorative painting base material is a PET film, the protective layer can be a UV transparent protective material or a plastic film. The UV transparent protective layer is obtained by spraying UV transparent protective paint on the surface of the decorative picture by adopting a spraying method and then carrying out UV irradiation curing; the plastic protective film can be adhered and covered on the surface of the PET decorative picture substrate through the adhesive, so that the decorative patterns and the substrate are protected.
The infrared absorption layer 7 is a thin layer with a thickness of 0.1-1000 μm (preferably 50-200 μm; more preferably 150 μm) coated on the back surface (i.e. the side away from the user and the inner surface) of the decorative picture by coating, printing, vapor deposition (chemical vapor deposition CVD, physical vapor deposition PVD, PVD may be vapor deposition or sputter coating), and is used for absorbing the far infrared rays emitted from the heating element, reducing the reflection of the far infrared rays from the back surface of the decorative picture back to the heating element, and improving the transfer efficiency of energy from the heating element to the decorative layer.
The infrared absorption layer is made of one or more materials of raw materials of indium tin oxide, tin antimony oxide, tungsten cesium oxide, tungsten tin oxide, zinc oxide, silicon oxide, aluminum oxide, calcium carbonate, titanium dioxide, wollastonite, silica gel powder, graphite, a micro-nano carbon material, nano silicon powder, melamine, polyphenylene sulfide, boric acid, resin, polyethylene wax, zinc stearate and white oil.
The micro-nano carbon material is graphene, graphite alkyne, carbon black or a carbon nano tube; the resin is PP (polypropylene), PET, PC (polychloroprene), ABS (polyacrylonitrile-butadiene-styrene), PMMA (polymethyl methacrylate), PS (polystyrene) or PVC (polyvinyl chloride).
The infrared absorbing layer in the present invention is preferably a thin layer made of carbon nanotube, graphene or zinc oxide material.
The graphene heating body layer 3 is an energy core source of the electric heating picture, and is used for generating heat and far infrared rays, and consists of two insulating plates (such as a glass fiber plate, a mica plate and the like) and a graphene heating film which are tightly overlapped together, the graphene heating film layer is clamped between the two insulating plates, a wiring terminal (not shown in the figure) which is used for being electrically connected with an external power supply is further arranged at the edge of the graphene heating film, the wiring terminal is electrically connected with the external power supply through a lead (not shown in the figure), and a temperature controller (not shown in the figure) is further arranged on the lead. The power on-off of the graphene heating layer and the temperature of the graphene heating layer are controlled through the temperature controller, the use safety of the electric heating picture is improved, and after the electric heating picture is powered on, the graphene heating film generates heat and emits infrared rays and heat.
The graphene heating element is prepared by the following method:
A) forming a graphene-containing slurry layer on the surface of the insulating plate by coating or printing the graphene-containing slurry, and then baking to form a graphene film layer;
B) printing silver paste on the surface of the graphene film layer, overlapping the silver paste and the graphene dry film layer, and then baking to form a silver paste dry film to prepare a silver paste electrode-graphene heating layer-glass fiber board;
C) coating an adhesive on the surface of a second glass fiber board or an insulation board, and performing press-fit treatment on the second glass fiber board or the insulation board and the silver paste electrode-graphene heating layer-glass fiber board prepared in the step B), meanwhile, reserving corresponding via holes on the glass fiber board or the insulation board corresponding to the positions of the silver paste electrodes, respectively placing a copper sheet with the thickness of 12-500 mu m on the surfaces of the silver pastes at the two via hole positions as a wiring terminal before press-fit, wherein the size of the copper sheet is 3-10mm larger than the diameter of the via hole, and the copper sheet is packaged between the two insulation boards after press-fit and used for connecting the silver paste and leading out an external power line.
The graphene film layer has a thickness of 50 μm (typically 10-200 μm); the slurry containing the graphene is a slurry containing only a graphene material, or can be a mixed material containing the graphene, and the mixed material further contains one or more of carbon nanotubes, graphite alkyne, carbon black, graphite powder, metal nanowires and resin.
The graphene film can be a film layer made of only graphene materials, or a film layer made of a mixed material containing graphene, wherein the mixed material further contains one or more of carbon nanotubes, graphite alkyne, carbon black, graphite powder, metal nanowires and resin.
The graphene heating film used in the invention can be prepared by coating, screen printing and vapor deposition on the surface of an insulating plate, and can also be prepared by adopting a graphene heating film disclosed in Chinese patent with the patent number Z L201820042371. X, namely the graphene heating film for the intelligent wearable garment, and the graphene heating film is arranged between two glass fiber plates or insulating plates and is pressed to form the graphene heating body.
The graphene heating film comprises a base material film, a copper foil circuit board, a graphene film and a protective film which are sequentially overlapped together from bottom to top, and the electric connection points are positioned on two electrodes of the copper foil circuit board. The copper foil circuit board is formed by laminating an ultrathin copper foil on a substrate film and etching a circuit by using a film process, and the two ends of the copper foil circuit board are connected with wiring terminals and are connected with a power supply through a lead so as to work.
The infrared reinforcing layer 8 is formed by coating, printing, or vapor deposition (chemical vapor deposition CVD or physical vapor deposition PVD) a thin layer having a thickness of 0.1 to 1000 μm (preferably 10 to 300 μm, and more preferably 200 μm) on the surface of the graphene heat-generating layer facing the surface decorative picture (i.e., on the surface of the glass fiber board or the insulating board facing the decorative picture). The infrared enhancement layer is made of one or more of graphite, micro-nano carbon materials, nano silicon powder, metal oxides, silicon oxide, silicon carbide, boron carbide, sodium silicate or aluminum silicate, and has the functions of increasing the far infrared emission efficiency of the surface of the heating body and improving the overall far infrared conversion efficiency of the heating picture.
The micro-nano carbon material is diamond, diamond-like carbon, graphene, graphite alkyne, carbon black or carbon nano tube; the metal oxide is ferric oxide, nickel oxide, chromium oxide, copper oxide, manganese oxide, cobalt oxide or aluminum oxide.
The infrared enhancement layer is made of silicon carbide, graphene, silicon oxide or graphite into a thin layer.
The heat-insulating layer 5 is a glass magnesium board layer and is made of glass magnesium board materials.
The infrared reflecting layer 4 is formed by covering a thin layer with the thickness of 0.1-1000 microns (preferably 100 microns) on the surface of the side, facing the graphene heating element, of the heat insulation layer in a coating, printing and vapor deposition (chemical vapor deposition (CVD) or Physical Vapor Deposition (PVD) mode, the infrared reflecting layer 4 is made of one or more materials of aluminum, silver, copper, Polyethylene (PE), glass fiber and polyethylene terephthalate (PET), and is used for reflecting far infrared rays emitted from the heating element to the heat insulation layer, weakening the efficiency of energy transfer from the heating element to the heat insulation layer and improving the energy transfer efficiency of the heating element in the direction of the decorative picture.
As shown in fig. 3, another embodiment structure of the graphene electrothermal picture of the present invention includes an electrothermal picture main body and a frame 6 for fixing the electrothermal picture main body, wherein the electrothermal picture main body includes a surface decoration picture 1, a graphene heating element layer 3, and an insulating layer 5, which are sequentially arranged from outside to inside at intervals, wherein the decoration picture, the heating element layer, and the insulating layer are spaced at a certain distance, and the spacing distance between two adjacent layers is 3-15mm (preferably 5mm), wherein: the outer surface (i.e. the side facing the user of the electric heating picture) of the surface layer decorative picture is provided with a decorative picture protective layer 2, and the inner surface facing the heating body is provided with an infrared absorption layer 7.
As shown in fig. 4, the third embodiment structure of the graphene electrothermal painting of the present invention includes an electrothermal painting main body and a frame 6 for fixing the electrothermal painting main body, wherein the electrothermal painting main body includes a surface decoration painting 1, a graphene heating body layer 3, and an insulating layer 5, which are sequentially arranged from outside to inside at intervals, wherein the decoration painting, the heating body layer, and the insulating layer are spaced at a certain distance, and the spacing distance between two adjacent layers is 3-15mm (preferably 5mm), wherein: the outer surface (i.e. the side facing the user of the electric heating picture) of the surface layer decorative picture is provided with a decorative picture protective layer 2; an infrared reinforcing layer 8 is provided on the surface of the heat-generating body layer on the side facing the decorative picture.
As shown in fig. 5, the fourth embodiment structure of the graphene electrothermal painting of the present invention includes an electrothermal painting main body and a frame 6 for fixing the electrothermal painting main body, wherein the electrothermal painting main body includes a surface decoration painting 1, a graphene heating element layer 3, and an insulating layer 5, which are sequentially arranged from outside to inside at intervals, wherein the decoration painting, the heating element layer, and the insulating layer are spaced at a certain distance, and the spacing distance between two adjacent layers is 3-15mm (preferably 5mm), wherein: the outer surface (i.e. the side facing the user of the electric heating picture) of the surface layer decorative picture is provided with a decorative picture protective layer 2, and the inner surface facing the heating body is provided with an infrared absorption layer 7; an infrared reflecting layer 4 is arranged on the surface of one side of the heat preservation layer facing the heating body.
As shown in fig. 6, the fifth implementation structure of the graphene electrothermal painting of the present invention includes an electrothermal painting main body and a frame 6 for fixing the electrothermal painting main body, wherein the electrothermal painting main body includes a surface decoration painting 1, a graphene heating layer 3, and an insulating layer 5, which are sequentially arranged from outside to inside at intervals, wherein the decoration painting, the heating layer, and the insulating layer are spaced at a certain distance, and the spacing distance between two adjacent layers is 3-15mm (preferably 5mm), wherein: the outer surface (i.e. the side facing the user of the electric heating picture) of the surface layer decorative picture is provided with a decorative picture protective layer 2, and the inner surface facing the heating body is provided with an infrared absorption layer 7; an infrared reinforcing layer 8 is provided on the surface of the heat-generating body layer on the side facing the decorative picture.
As shown in fig. 7, the sixth implementation structure of the graphene electrothermal painting of the present invention includes an electrothermal painting main body and a frame 6 for fixing the electrothermal painting main body, wherein the electrothermal painting main body includes a surface decoration painting 1, a graphene heating layer 3, and an insulating layer 5, which are sequentially arranged from outside to inside at intervals, wherein the decoration painting, the heating layer, and the insulating layer are spaced at a certain distance, and the spacing distance between two adjacent layers is 3-15mm (preferably 5mm), wherein: the outer surface (i.e. the side facing the user of the electric heating picture) of the surface layer decorative picture is provided with a decorative picture protective layer 2; an infrared enhancement layer 8 is arranged on the surface of one side of the heating body layer facing the decorative picture; an infrared reflecting layer 4 is arranged on the surface of one side of the heat preservation layer facing the heating body.
Example 1
1. Preparation of graphene heating element
1-1) printing graphene slurry on the surface of a glass fiber board with electrical insulation property by a screen printing method, printing a graphene layer on the surface of the glass fiber board, and baking the graphene layer at 150 ℃ for 60min to form a graphene dry film thin layer with the thickness of 50 micrometers (usually 10-200 micrometers);
in addition to screen printing, other materials such as coating are suitable for use in the present invention.
1-2) printing a silver paste electrode on a glass fiber plate, overlapping the silver paste electrode with a graphene dry film layer to form good electric connection, after silver paste printing, baking at 150 ℃ for 60min to form a dry film, wherein the thickness of the film is 25 micrometers (usually 20-30 micrometers), and preparing the silver paste electrode-graphene heating layer-glass fiber plate;
1-3) coating a layer of epoxy resin (adhesive) on the surface of a second glass fiber board, and laminating with the prepared silver paste electrode-graphene heating layer-glass fiber board prepared in the step 1-2), wherein the laminating temperature is 180 ℃ and 60min, meanwhile, corresponding via holes are reserved on the glass fiber board corresponding to the positions of the silver paste electrodes, before laminating, copper sheets with the thickness of 50 micrometers are respectively placed on the surfaces of the silver pastes at the two via hole positions to serve as wiring terminals, the peripheral size of each copper sheet is larger than the diameter of each via hole by 8mm, and the copper sheets are packaged between two insulating boards after laminating and used for connecting the silver pastes and leading out an external power line.
And 1-4) connecting an external power line (connecting a temperature controller and a socket) with a copper sheet wiring terminal in a welding mode through a via hole, and carrying out insulation treatment on the via hole through insulation mud or insulation glue. The heating body finally comprises two layers of glass fiber plates, a graphene heating layer, a silver paste electrode and a copper terminal electrode, and the total thickness is 3 mm.
The graphene heating element provided by the invention is a heating element containing a graphene material, and comprises a heating element only containing graphene as a heating film layer material, and also comprises a mixed heating element containing the graphene material, namely the heating element contains one or more of carbon nano tubes, graphite alkyne, carbon black, graphite powder, metal nano wires and resin besides the graphene material.
2. Preparation of an Infrared enhancement layer
2-1) preparing slurry for enhancing layer
Mixing infrared enhanced raw material silicon carbide powder and adhesive water-based epoxy resin, stirring and dispersing uniformly to prepare enhanced layer slurry with the viscosity of 2500cps (usually 1000-10000cps), wherein the weight part ratio of the silicon carbide to the adhesive is 20:80 (usually 10-30:70-90), and the particle size of the silicon carbide powder is 0.1-3 μm, preferably 0.1-0.5 μm.
Raw materials of the infrared enhancement layer slurry are other than silicon carbide, and one or more of graphite, micro-nano carbon material, nano silicon powder, metal oxide, silicon carbide, boron carbide, sodium silicate, aluminum silicate, diamond-like carbon, graphene, graphite alkyne, carbon black, carbon nanotube, iron oxide, nickel oxide, chromium oxide, copper oxide, manganese oxide, cobalt oxide or aluminum oxide are suitable for the invention.
In the embodiment of the present invention, silicon carbide is taken as an example, and other materials such as graphene, silicon oxide or graphite are all suitable for the present invention.
2-2) coating treatment
Spraying infrared enhancement layer slurry on the side of the graphene heating body layer facing the surface layer decorative picture, then baking for 30min (usually 20-40min) at the temperature of 150 ℃ (usually 120-180 ℃), and curing the slurry to form an infrared enhancement layer with the thickness of 200 μm (usually 0.1-1000 μm, preferably 10-300 μm).
In the embodiment of the present invention, the infrared enhancement layer is prepared by spraying, and besides the spraying, other methods in the art, such as printing, spin coating, curtain coating, deposition, etc., are all suitable for preparing the infrared enhancement layer.
3. Preparation of an Infrared absorbing layer
Preparing a carbon nano tube coating on the back surface of the base material of the manufactured decorative picture, namely the side facing the graphene heating body, in a coating mode; after curing, an infrared absorption layer is formed and attached to the back surface of the base material of the decorative picture, and the thickness of the infrared absorption layer is 100 μm (usually 0.1-1000 μm);
3-1) preparing slurry of an absorption layer
Mixing infrared absorption raw material carbon nanotube powder and adhesive water-based acrylic resin, stirring and dispersing uniformly to prepare reinforcing layer slurry with the viscosity of 1500cps (usually 500-5000cps), wherein the weight part ratio of the carbon nanotube to the adhesive is 15:85 (usually 10-30:70-90), the diameter of the carbon nanotube is 0.005-0.05 μm, and the length of the carbon nanotube is 5-20 μm.
3-2) coating treatment
Spraying infrared absorption layer slurry on the back surface (i.e. the side facing the graphene heating body layer) of the surface layer decorative picture, then baking for 40min (usually 20-40min) at 130 ℃ (usually 120-.
In the embodiment of the present invention, the infrared absorption layer is prepared by spraying, and besides the spraying, other methods in the art, such as printing, spin coating, curtain coating, deposition, etc., are all suitable for preparing the infrared absorption layer.
4. Preparing decorative picture protective layer
The surface of the surface decorative picture coated with the infrared absorption layer (i.e. the side facing the user) is covered with a PET film by an adhesive to form a decorative picture protective layer 2.
Besides adopting the adhesive to cover the PET film on the surface of the decorative picture, the invention can also directly spray the curing type UV gloss oil on the surface of the decorative picture, and form the protective layer of the decorative picture through UV light irradiation and curing.
5. Preparation of the reflective layer
And covering a pure aluminum foil film on the surface of the heat-preservation layer glass magnesium board through an adhesive to form an infrared reflecting layer 4, wherein the thickness of the aluminum foil is 100 mu m.
In the embodiments of the present invention, the aluminum film layer is taken as an example for illustration, and other film layers made of one or more materials such as silver, copper, Polyethylene (PE), glass fiber, and PET are suitable for use as the infrared reflecting layer of the present invention.
In addition, in the present embodiment, the reflective layer is prepared by directly bonding the aluminum thin film by using an adhesive, and the aluminum thin film layer (i.e. the infrared reflective layer 4) with a thickness of 100 μm (usually 0.1 to 1000 μm, preferably 10 to 200 μm) can also be prepared on the surface of the insulating layer glass magnesium plate by one or more of printing, spraying, suspension coating, curtain coating, Chemical Vapor Deposition (CVD) method or PVD (evaporation, sputtering).
6. Assembly
The decorative picture (comprising a protective layer and an infrared absorption layer), the heating body (comprising an infrared enhancement layer) and the heat preservation layer (comprising a reflection layer) of the electric heating picture are assembled in sequence by adopting an aluminum alloy frame to form a complete electric heating picture structure, the total thickness of the electric heating picture is about 1cm, wherein the decorative picture layer, the graphene heating body layer and the heat preservation layer are arranged at intervals, and the distance between every two adjacent layers is 5mm (usually 3-15 mm).
The binding post of the heat-generating body of electric heat picture passes through the wire and sets up external temperature controller, wire socket electricity on the wire and is connected, after the switch on, generates heat through temperature controller control heat-generating body, and graphite alkene heat-generating body launches far infrared to both sides, and reflection stratum and heat preservation ensure that the heat is mainly preserved in heat-generating body and decoration picture one side. And the silicon carbide infrared enhancement layer and the carbon nano tube infrared absorption layer can transfer energy from the heating body to the decoration layer more efficiently, and effectively improve the working efficiency (electricity-heat radiation conversion efficiency) of the electric heating picture.
Example 2
1. Preparation of graphene heating element
The same as example 1 was repeated, except that the graphene paste was coated on the mica substrate by coating to prepare a graphene heating element and form a heating element layer;
2. preparation of an Infrared enhancement layer
Same as in example 1.
3. Preparation of an Infrared absorbing layer
Same as in example 1.
4. Preparing decorative picture protective layer
Same as in example 1.
5. Preparation of the Infrared reflecting layer
The same procedure as in example 1 was repeated, except that a reflection film of a composite aluminum foil (a flexible aluminum foil, a heat-resistant PE adhesive, PET, and glass fiber) was used.
6. Assembly
Same as in example 1.
Example 3
1. Preparation of graphene heating element
Same as in example 1.
2. Preparation of an Infrared enhancement layer
2-1) preparing slurry for enhancing layer
Mixing infrared enhancement raw materials, namely silicon oxide powder, graphite powder and adhesive water-based epoxy resin, uniformly stirring and dispersing to prepare enhancement layer slurry with the viscosity of 2500cps (usually 1000-10000cps), wherein the weight ratio of the infrared enhancement raw materials to the adhesive is 20:80 (usually 10-30:70-90), the weight ratio of the silicon oxide to the graphite is 1:1 (usually 1 (0.5-1.5)), and the particle diameters of the silicon oxide powder and the graphite powder are 0.1-3 μm, preferably 0.1-0.5 μm.
2-2) coating treatment
The same procedure as in step 2-2) of example 1 was repeated, except that the infrared enhancing layer slurry was silicon oxide, graphite and an aqueous epoxy resin.
3. Preparation of an Infrared absorbing layer
Preparing a graphene coating on the back surface of the base material of the manufactured decorative picture, namely the side facing the graphene heating body, in a coating manner; after curing, an infrared absorption layer is formed and attached to the back surface of the base material of the decorative picture, and the thickness of the infrared absorption layer is 100 μm (usually 0.1-1000 μm);
3-1) preparing slurry of an absorption layer
The same as in example 1 was conducted except that the infrared absorbing raw material was graphene powder, wherein the particle size of the graphene powder was 0.5 to 3 μm, preferably 0.5 to 1 μm.
3-2) coating treatment
The procedure was carried out in the same manner as in step 3-2) of example 1 except that the spin coating was carried out.
4. Preparing decorative picture protective layer
Same as in example 1.
5. Preparation of the Infrared reflecting layer
Same as in example 1.
6. Assembly
Same as in example 1.
Example 4
1. Preparation of graphene heating element
The same procedure as in example 1 was repeated, except that a graphene paste was applied to a mica substrate to prepare a graphene heating element and form a heating element layer;
2. preparation of an Infrared enhancement layer
Coating a silicon oxide-graphite infrared enhancement layer on one side, facing the electric heating picture decoration layer, of the graphene heating body layer;
2-1) preparing slurry for enhancing layer
Mixing infrared enhancement raw materials, namely silicon oxide powder, graphite powder and adhesive water-based epoxy resin, uniformly stirring and dispersing to prepare enhancement layer slurry with the viscosity of 2500cps (usually 1000-10000cps), wherein the weight ratio of the infrared enhancement raw materials to the adhesive is 20:80 (usually 10-30:70-90), the weight ratio of the silicon oxide to the graphite is 1:1 (usually 1 (0.5-1.5)), and the particle diameters of the silicon oxide powder and the graphite powder are 0.1-3 μm, preferably 0.1-0.5 μm.
2-2) coating treatment
The same procedure as in step 2-2) of example 1 was repeated, except that the infrared reinforcing layer slurry was prepared by using silicon oxide, graphite and aqueous epoxy resin and by flow coating.
3. Preparation of an Infrared absorbing layer
Preparing a graphene coating on the back surface of the base material of the manufactured decorative picture, namely the side facing the graphene heating body, in a coating manner; after curing, an infrared absorption layer is formed and attached to the back surface of the base material of the decorative picture, and the thickness of the infrared absorption layer is 100 μm (usually 0.1-1000 μm);
3-1) preparing slurry of an absorption layer
Mixing infrared absorption raw material graphene powder and adhesive aqueous acrylic resin, stirring and uniformly dispersing to prepare reinforcing layer slurry with the viscosity of 1500cps (usually 500-5000cps), wherein the weight part ratio of the graphene to the adhesive is 20:80 (usually 10-30:70-90), and the particle size of the graphene powder is 0.5-3 μm, preferably 0.5-1 μm.
3-2) coating treatment
Same as in example 1.
4. Preparing decorative picture protective layer
And spraying curing type UV gloss oil on the surface of the decorative picture, and irradiating and curing by UV light to form a decorative picture protective layer.
5. Preparation of the Infrared reflecting layer
Same as in example 1.
6. Assembly
Same as in example 1.
Comparative example 1
The procedure of example 1 was repeated, except that the infrared absorbing layer and the infrared reinforcing layer were not prepared, that is, the electric heating paintings did not have the infrared absorbing layer and the infrared reinforcing layer.
Comparative example 2
The same as example 1 was repeated except that the infrared absorbing layer, the infrared enhancing layer and the infrared reflecting layer were not formed, that is, the electric heating paintings did not have the infrared absorbing layer, the infrared enhancing layer and the infrared reflecting layer.
Comparative example 3
The procedure of example 1 was repeated except that the infrared absorbing layer and the infrared reinforcing layer were not prepared, that is, the electric heating paintings did not have the infrared absorbing layer and the infrared reinforcing layer, and the infrared reflecting layer was a composite aluminum foil reflecting layer.
Test example 1
The electric-thermal radiation conversion efficiency test method in the national standard GB/T7287-.
Table 1 test results of electric-thermal radiation conversion efficiency of electric heating picture
| Electric-thermal radiation conversion efficiency | Electric-thermal radiation conversion efficiency | ||
| Example 1 | 80％ | Comparative example 1 | 65％ |
| Example 2 | 78％ | Comparative example 2 | 60％ |
| Example 3 | 75％ | Comparative example 3 | 63％ |
| Example 4 | 76％ | - | - |
The electric-thermal conversion efficiency of the electric heating picture is obviously higher than that of the comparative example, namely the electric heating picture has advantages in various performances such as energy conservation, heating effect, far infrared physiotherapy and the like.
The graphene electric heating picture has the key point that an efficient energy transfer path is obtained by respectively arranging an infrared enhancement layer and an infrared absorption layer on the surface of a heating body layer in the electric heating picture and the back of a decorative picture, so that the graphene electric heating picture has higher working efficiency and has more advantages in heating and far infrared health care.
The above-described embodiments of the present invention are merely exemplary and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a graphite alkene electric heat is drawn, includes the frame of electric heat drawing main part and fixed electric heat drawing main part, wherein the electric heat drawing main part is decorated drawing, heat-generating body and heat preservation including the top layer of interval arrangement in proper order, characterized by still including setting up infrared enhancement layer on the heat-generating body for increase heat-generating body surface far infrared emission efficiency, and infrared enhancement layer orientation the drawing is decorated on the top layer.
2. The utility model provides a graphite alkene electric heat is drawn, includes the frame that electric heat drawn the main part and fixed electric heat drawn the main part, wherein the electric heat is drawn the main part and is decorated drawing, heat-generating body and heat preservation including the top layer of interval arrangement in proper order, and characterized by still is in including setting up the infrared absorbed layer of drawing is decorated on the top layer for absorb the far infrared that launches from the heat-generating body, reduce far infrared's reflection, and infrared absorbed layer orientation the heat-generating body.
3. The utility model provides a graphite alkene electric heat is drawn, includes the frame that electric heat drawn the main part and fixed electric heat drawn the main part, wherein the electric heat drawn the main part and is decorated drawing, heat-generating body and heat preservation including the top layer of interval arrangement in proper order, characterized by still including setting up infrared reflection layer on the heat preservation for the far infrared of heat-generating body to the heat preservation transmission is followed in the reflection, reduces the heat and shifts to the heat preservation from the heat-generating body, and infrared reflection layer orientation the heat-generating body.
4. The utility model provides a graphite alkene electric heat is drawn, includes the frame that the electric heat was drawn main part and fixed electric heat and was drawn the main part, wherein the electric heat is drawn the main part and is decorated drawing, heat-generating body and heat preservation including the top layer of interval arrangement in proper order, and characterized by still includes infrared enhancement layer and infrared absorbing layer, wherein: the infrared enhancement layer is arranged on the heating body, faces the surface layer decorative picture and is used for increasing far infrared emission efficiency of the surface of the heating body; the infrared absorption layer is arranged on the surface layer decorative picture and faces the heating body and is used for absorbing far infrared rays emitted from the heating body and reducing reflection of the far infrared rays.
5. The utility model provides a graphite alkene electric heat is drawn, includes the frame that the electric heat was drawn the main part and was drawn the main part with fixed electric heat, wherein the electric heat is drawn the main part and is decorated drawing, heat-generating body and heat preservation including the top layer of interval arrangement in proper order, and characterized by still includes infrared enhancement layer and infrared reflection layer, wherein: the infrared enhancement layer is arranged on the heating body, faces the surface layer decorative picture and is used for increasing far infrared emission efficiency of the surface of the heating body; the infrared reflection layer is arranged on the heat preservation layer and faces the heating body, and is used for reflecting far infrared rays emitted from the heating body to the heat preservation layer and reducing heat transfer from the heating body to the heat preservation layer.
6. The utility model provides a graphite alkene electric heat is drawn, includes that the electric heat draws the frame of main part and fixed electric heat drawing main part, wherein the electric heat drawing main part is decorated drawing, heat-generating body and heat preservation including the top layer of interval arrangement in proper order, characterized by still includes infrared absorption layer and infrared reflection layer, wherein: the infrared absorption layer is arranged on the surface decorative picture, faces the heating body, and is used for absorbing far infrared rays emitted from the heating body and reducing reflection of the far infrared rays; the infrared reflection layer is arranged on the heat preservation layer and faces the heating body, and is used for reflecting far infrared rays emitted from the heating body to the heat preservation layer and reducing heat transfer from the heating body to the heat preservation layer.
7. The utility model provides a graphite alkene electric heat is drawn, includes that the electric heat draws the frame of main part and fixed electric heat drawing main part, wherein the electric heat drawing main part is including the top layer decoration picture of interval arrangement in proper order, heat-generating body and heat preservation, and characterized by still includes infrared enhancement layer, infrared absorbing layer and infrared reflection layer, wherein: the infrared enhancement layer is arranged on the heating body, faces the surface layer decorative picture and is used for increasing far infrared emission efficiency of the surface of the heating body; the infrared absorption layer is arranged on the surface decorative picture, faces the heating body, and is used for absorbing far infrared rays emitted from the heating body and reducing reflection of the far infrared rays; the infrared reflection layer is arranged on the heat preservation layer and faces the heating body, and is used for reflecting far infrared rays emitted from the heating body to the heat preservation layer and reducing heat transfer from the heating body to the heat preservation layer.
8. An electrothermal picture according to claim 1, 4, 5 or 7, wherein the infrared enhancement layer is made of one or more of graphite, micro-nano carbon material, nano silicon powder, metal oxide, silicon carbide, boron carbide, sodium silicate and aluminium silicate.
9. The electrothermal picture according to claim 2, 4, 6 or 7, wherein the infrared absorption layer is made of one or more materials selected from indium tin oxide, antimony tin oxide, cesium tungsten oxide, tungsten tin oxide, zinc oxide, silicon oxide, aluminum oxide, calcium carbonate, titanium dioxide, wollastonite, silica gel powder, graphite, micro-nano carbon material, nano silicon powder, melamine, polyphenylene sulfide, boric acid, resin, polyethylene wax, zinc stearate and white oil.
10. An electrothermal picture according to claim 3, 5, 6 or 7, wherein the infrared reflective layer is made of one or more of aluminium, silver, copper, PE, fibreglass, PET.
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| CN202010297175.9A CN111396973A (en) | 2020-04-15 | 2020-04-15 | Graphite alkene electric heat is drawn |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579118A (en) * | 2018-12-27 | 2019-04-05 | 中国科学院山西煤炭化学研究所 | Graphene intelligent warming mural painting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579118A (en) * | 2018-12-27 | 2019-04-05 | 中国科学院山西煤炭化学研究所 | Graphene intelligent warming mural painting |
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