CN211531348U - Graphene heating film and graphene heating device - Google Patents

Abstract

The utility model provides a graphene heating film, comprising a carrier and a plurality of side-by-side graphene heating coatings coated on the carrier, the graphene heating coating is hot-pressed and covered with a polymer insulating film; The bottoms of the two ends of the graphene heating coating are provided with electrode strips, the electrode strips are electrically connected with the graphene heating coating, and graphene that blocks the contact between the electrode strips and the carrier is provided between the electrode strips and the carrier. The graphene heating film is also provided with at least a pair of electrode holes, and at least a pair of the electrode holes are respectively arranged at both ends of the graphene heating film and penetrate the graphene heating film. When the electrode holes are sleeved on the electrode rod , the electrode current-carrying strip is electrically connected with the electrode rod. The graphene heating film of the utility model can not only ensure that the graphene heating film is fixed in the graphene heating device, but also can ensure good electrical conductivity between the graphene heating film and the electrode rod, and the safe current carrying is more reliable. The utility model also provides a graphene heating device.

Description

A kind of graphene heating film and graphene heating device

technical field

The utility model relates to the technical field of nanomaterials, in particular to a graphene heating film, and the utility model also relates to a graphene heating device.

Background technique

Graphene is a two-dimensional nanomaterial with a hexagonal honeycomb lattice structure formed by carbon atoms through sp2 hybrid orbitals and only one layer of carbon atom thickness. The unique structure of graphene endows it with many excellent properties, such as high theoretical specific surface area ( ^2630m2 /g), ultra-high electron mobility (~ ^200000cm2 /vs), high thermal conductivity (5000W/mK), high Young's modulus (1.0TPa) and high transmittance (~97.7%), etc. With its structural and performance advantages, graphene has great application prospects in the fields of energy storage and conversion devices, nanoelectronic devices, multifunctional sensors, flexible wearable electronics, electromagnetic shielding, and anti-corrosion. In view of the flexibility and conductive properties of graphene, a conductive ink is prepared by adding graphene slurry into the ink, and then a graphene heating layer is prepared by ink spraying and drying, and a graphene heating element is made, which has the advantages of fast production process, It has the characteristics of material saving and low cost.

With people's yearning for a better and healthy life, it is imperative to improve the traditional heating system, find more economical and clean alternative energy sources, and develop a new type of green and low-carbon heating system. Electric heating technology based on graphene infrared emission properties, namely graphene-based infrared heating ink and its infrared heating element technology, provides an effective solution to the above problems. Compared with traditional heating methods such as coal burning, steam, hot air and resistance, graphene heating has the advantages of fast heating speed, high electricity-to-heat conversion rate, automatic temperature control, partition control, stable heating, no abnormal noise in the heating process, and operating costs. Low cost, relatively uniform heating, small footprint, low investment and production costs, long service life and high work efficiency, which are more conducive to popularization and application. Using it to replace traditional heating, its power saving effect is particularly significant, generally saving about 30%, and even up to 60% to 70% in individual occasions.

The core part of graphene infrared heating murals, wallpapers, floors and other devices is the graphene heating plate/functional layer. In the prior art, graphene is generally prepared into graphene slurry, ink or coating by printing, and then a graphene heating coating is prepared. However, the graphene heating films and heating devices prepared by these methods have functional layers with poor thickness controllability, large square resistance, and uneven heat generation, which are difficult to meet practical applications. short life, etc.

Utility model content

In view of this, the utility model provides a graphene heating film, in order to solve the problems in the prior art that the heating uniformity of the graphene heating film is difficult to guarantee, the high-voltage breakdown force is poor, the graphene heating film has a poor fixing effect and Defects such as poor conductivity.

In the first aspect, the utility model provides a graphene heating film, comprising a carrier and several graphene heating coatings that are arranged side by side and are coated on the carrier, and the graphene heating coating is hot-pressed and covered with a polymer. insulating film;

The bottoms of any of the two ends of the graphene heating coating are provided with electrode strips, the electrode strips are electrically connected with the graphene heating coating, and the electrode strips and the carrier are provided with graphite that blocks the contact between the electrode strips and the carrier. vinyl;

The two ends of the graphene heating coating are also provided with electrode current-carrying bars, and the electrode current-carrying bars are sandwiched between the graphene heating coating and the polymer insulating film, and several graphene heating coatings arranged side by side are all arranged. be electrically connected to the electrode current-carrying strip;

Both ends of any of the graphene heating coatings are also provided with electrode connecting sections, and the electrode connecting sections are sandwiched between the graphene heating coating and the electrode current-carrying bars, and the graphene heating coatings that are arranged side by side pass through. The electrode connecting section is electrically connected with the electrode current-carrying strip;

The graphene heating film is also provided with at least a pair of electrode holes, and at least a pair of the electrode holes are respectively arranged at both ends of the graphene heating film and penetrate the graphene heating film. The electrode current-carrying strip is electrically connected with the electrode rod.

Preferably, the electrode hole is further provided with an electrode buckle for buckling the electrode rod, and the electrode buckle is electrically connected to the electrode current-carrying strip.

Preferably, the electrode buckle is a metal buckle, and the outer edge of the metal buckle is electrically connected to the graphene heating film, and the inner edge of the metal buckle is used to sleeve the electrode rod.

Preferably, a first heat reflection layer is further provided between the carrier and the graphene heating coating, and the first heat reflection layer includes a first insulating layer, a metal foil layer and a second insulating layer;

The metal foil layer is arranged between the first insulating layer and the second insulating layer, the first insulating layer is arranged between the carrier and the metal foil layer for connecting the carrier and the metal foil layer, and the second insulating layer It is arranged between the metal foil layer and the graphene heating coating for connecting the metal foil layer and the graphene heating coating.

Preferably, a heat storage and slow release layer is further arranged between the graphene heating coating and the polymer insulating film.

Preferably, the carrier is a modified PET film, the polymer insulating film is a PET film, and the surface of the PET film is coated with fumed alumina.

Preferably, both ends of any of the graphene heating coatings are provided with a plurality of evenly distributed square holes.

The graphene heating film of the utility model comprises a carrier and a plurality of side-by-side graphene heating coatings coated on the carrier, and the graphene heating coating is hot-pressed and covered with a polymer insulating film. The graphene heating coatings arranged side by side are beneficial to the thickness uniformity of the graphene heating coating, and achieve a stable graphene heating resistance, thereby improving the far-infrared phase emissivity of graphene and the conversion efficiency of electrothermal radiation. There is a graphene strip between the electrode strip and the carrier to block the contact between the electrode strip and the carrier, which can effectively block the direct contact between the silver electrode strip and the carrier, prevent the vulcanization reaction between the two, and prolong the service life of the product. Several graphene heating coatings are connected in parallel with the help of electrode connecting sections and electrode current-carrying strips, thus forming a graphene heating film into an integral heating module. . The graphene heating film is also provided with at least a pair of electrode holes, and the electrode rods are sleeved through the electrode holes, which can not only ensure that the graphene heating film is fixed in the graphene heating device, but also ensure a good relationship between the graphene heating film and the electrode rod. The electrical conductivity is more reliable for safe current-carrying. The polymer insulating film is thermally coated on the electrode current-carrying strip and the upper surface of the graphene heating coating, so that the graphene heating coating has a strong anti-peeling force, and the graphene heating film is resistant to high voltage breakdown, and also prolongs the use of the product. life.

In the second aspect, the present invention provides a graphene heating device, comprising a groove base, an upper cover and the graphene heating film described in any one of the above, and the upper cover is covered with the groove base for forming an enclosure. an accommodating cavity, the graphene heating film is accommodated in the accommodating cavity;

Electrode rods corresponding to the electrode holes are arranged in the grooves of the groove base, and when the electrode holes are sleeved with the electrode rods, the electrode current-carrying bars are electrically connected to the electrode rods.

Preferably, four electrode rods are provided in the groove of the groove base, and four electrode holes are provided on the graphene heating film;

The graphene heating film is rectangular, and the four electrode holes are arranged at the four corners of the graphene heating film.

Preferably, a second heat reflection layer is provided on the inner wall of the groove of the groove base, the upper cover includes an insulating and heat-conducting layer and an anti-skid layer disposed on the insulating and heat-conducting layer, and the upper cover is covered with the recessed heat-conducting layer. When the groove base is used, the insulating and heat-conducting layer faces the groove base.

Preferably, a multi-layer graphene heating film is arranged in the groove of the groove base, the graphene heating coating of the multi-layer graphene heating film is directed towards the upper cover, and the multilayer graphene heating film is stacked in turn and is connected to the electrode. Rod socket.

The graphene heating device of the utility model comprises a groove base, an upper cover and a graphene heating film. The graphene heating film has considerable flexibility, toughness and hardness, and has the functions of bending resistance, wear resistance and proper stretching. The graphene heating device of the utility model also has the advantages of convenient assembly, stable structure, good electrical conductivity, etc., the heating device is well protected, has the characteristics of preventing electric leakage, low energy consumption, high temperature resistance, long service life, etc., and has strong practicability and outstanding economic value. .

The advantages of the present invention will be explained in part in the following description, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present invention.

Description of drawings

In order to illustrate the content of the present utility model more clearly, the following detailed description will be given in conjunction with the accompanying drawings and specific embodiments.

1 is an exploded view of an electric heating device according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of the internal structure of the groove base shown in Fig. 1 (the four walls of the groove base are hidden);

Fig. 3 is the structural schematic diagram of the upper cover shown in Fig. 1;

FIG. 4 is a schematic diagram of the arrangement structure between the heating plate and the upper cover shown in FIG. 1;

Fig. 5 is the exploded view of graphene heating film shown in Fig. 1;

FIG. 6 is a longitudinal cross-sectional view of the heat reflective layer shown in FIG. 5 .

Detailed ways

The following description is the preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made. These improvements and modifications It is also regarded as the protection scope of the present invention.

Example 1

As shown in FIG. 1, the utility model discloses a graphene heating device. The graphene heating device has a groove base 1 , an upper cover 2 and a graphene heating film 3 . The upper cover 2 is covered on the groove base 1 to form an accommodating cavity. When assembling the graphene heating device, the graphene heating film 3 is first accommodated in the groove of the groove base 1, and then the upper cover 2 is covered. Fitted on the groove base 1 to seal the groove, thereby assembling a graphene heating device. In this embodiment, as shown in FIG. 2 (the four walls of the groove base are omitted), four electrode rods 11 are also arranged in the groove of the groove base 1, for example, aluminum metal electrode rods, graphite rods The olefin heating film 3 is provided with electrode holes 31 corresponding to the electrode rods 11 . When assembling the graphene heating film 3, the four electrode rods 11 are aligned with the four electrode holes 31 and penetrated, so that the graphene heating film 3 is firmly fixed in the groove of the groove base 1, and at the same time, due to The electrode rod 11 is electrically connected to the graphene heating film 3 , so that the graphene heating film 3 can be powered and heat generated through the electrode rod 11 .

As a preferred implementation of this embodiment, a plug or socket may be provided on the outer wall of the groove base 1 , and the plug or socket is electrically connected to a pair of the four electrode rods 11 , thereby facilitating the passage of the outer wall of the groove base 1 . The plugs or sockets and the electrode rods 11 on the Graphene heating film 3 supply power and generate heat.

In this embodiment, six plugs or sockets are provided on the outer wall of the groove base 1, and the six plugs or sockets are respectively electrically connected to two of the four electrode rods 11, and any two of the four electrode rods 11 are arranged and combined There are six groups in total, corresponding to six plugs or sockets respectively, and each plug or socket is marked with a selected pair of electrode rods 11 . Therefore, when any electrode rod 11 or electrode hole 31 is faulty (poor contact), other electrode rods 11 or electrode holes 31 can be selected to achieve electrical conduction, avoiding replacement of graphene heating film 3 or groove base 1. cumbersome process.

In other preferred embodiments, the number of electrode rods 11 and electrode holes 31 can also be 3, 5, 6, 7, 8, etc., which can ensure that the graphene heating film 3 is firmly fixed on the concave groove of the groove base 1 . In the groove, at the same time, because the electrode rod 11 and the graphene heating film 3 have a variety of optional electrical connection methods, the graphene heating film is effectively prevented from short circuit or poor contact during use, and the service life of the graphene heating device is prolonged.

In other preferred embodiments, a power adjustment knob or a touch screen may also be provided on the outer wall of the groove base 1 to adjust the heat generation power of the graphene heating film 3 . In other preferred embodiments, a display screen may also be provided on the outer wall of the groove base 1 to display the temperature of the groove surface and the working power.

In this embodiment, the cross section of the groove of the groove base 1 is rectangular, and correspondingly, the graphene heating film 3 is also rectangular. In other embodiments, the cross section of the groove of the groove base 1 and the graphene The heating film 3 can also be polygonal, circular, oval or irregular.

In this embodiment, the electrode hole 31 is also provided with a metal ring 32, for example, a metal nickel ring. The outer edge of the metal ring 32 is electrically connected to the graphene heating coating, and the inner edge of the metal ring 32 is electrically connected. Used to sleeve the electrode rod 11. By providing the metal ring buckle 32, the graphene heating coating and the graphene heating film 3 can be protected, so as to ensure that the graphene heating coating and the graphene heating film 3 are well electrically connected to the electrode rod 11, and also ensure that the graphene heating coating and the graphene heating film 3 are well electrically connected The graphene heating film 3 is fixed, which can also prevent the graphene heating coating and the graphene heating film 3 from being damaged during the process of sleeved electrode rod 11 . In this embodiment, the outer edge of the metal ring buckle 32 is provided with a plurality of metal hook claws, and the ends of the metal hook claws firmly grasp the electrode current-carrying bar, which plays the role of fixing the metal ring buckle 32 and also ensures the metal ring The buckle 32 has a good electrical connection between the electrode current-carrying strip and the graphene heating coating, that is, a good electrical connection between the electrode rod 11 and the graphene heating film 3 .

As a preferred embodiment, a heat reflection layer 12 is further provided on the inner wall of the groove of the groove base 1 . Thus, by setting the heat reflection layer 12, the heat generated by the graphene heating film 3 can be prevented from diffusing out through the outer wall and the base of the groove base 1 to cause heat waste, and the heat reflection layer 12 provided ensures that the heat generated by the graphene heating film 3 is only The upper cover 2 is diffused to the outside to ensure the effective use of thermal energy. In this embodiment, the heat reflection layer 12 is a silver mirror layer. In this embodiment, the groove base 1 is made of heat-resistant and flame-retardant material, or the groove base 1 can be provided with two layers inside and outside and a middle vacuum insulation layer, which also has the function of ensuring the effective utilization of heat energy.

As a preferred embodiment, as shown in FIG. 3 , the upper cover 2 includes an insulating and heat-conducting layer 21 and an anti-skid layer 22 disposed on the insulating and heat-conducting layer 21 , wherein the insulating and heat-conducting layer 21 is preferably made of The heat generated by the olefin heating film 3 diffuses out and can also play a good supporting role. The anti-skid layer 22 is preferably a flexible heat-conducting resin. When the upper cover 2 is covered with the groove base 1, the insulating and heat-conducting layer 21 faces downward, and the anti-skid layer 22 faces upward. and buffer pressure.

As a preferred embodiment, as shown in FIG. 4 , a temperature sensor 211 is further provided on the insulating and heat-conducting layer 21 , and the temperature sensor 211 is used to detect the temperature of the insulating and heat-conducting layer 21 . A temperature display screen 221 may also be provided on the anti-skid layer 22 for displaying the temperature detected by the temperature sensor 211, so as to facilitate the user to know the heat production situation of the graphene heating device in real time.

As a preferred embodiment, the groove of the groove base 1 can also be provided with a multilayer graphene heating film 3, and the graphene heating coating of the multilayer graphene heating film 3 is directed toward the upper cover 2, and the multilayer graphene heating The membranes 3 are stacked and castrated on the electrode rods 11 in sequence. The graphene heating films 3 arranged in multiple layers form a composite graphene heating film, which has the effect of increasing the heat generating power. When a certain graphene heating film 3 fails, since the multilayer graphene heating films 3 are connected in parallel with each other, the It will not interfere and has a certain supplementary heat production effect.

Example 2

As shown in FIG. 1 and FIG. 5 , four electrode holes 31 are also provided on the graphene heating film 3, and the four electrode holes 31 are respectively arranged at the four corners of the rectangular graphene heating film 3 and penetrate the graphene heating film 3. When the hole 31 is sleeved with the electrode rod 11 , the electrode current-carrying strip is electrically connected with the electrode rod 11 . Thus, good electrical conduction between the graphene heating film 3 and the electrode rod 11 is achieved.

As shown in FIG. 5 , it is a graphene heating film 3 according to an embodiment of the present invention. The graphene heating film 3 includes a carrier 301 and several graphene heating coatings 302 arranged side by side and coated on the carrier 301 . Among them, the carrier 301 is a modified PET film, and the modified PET film is first subjected to corona treatment on both sides of the PET film, and then the surface is treated with a hard coating, and heat-setting and desulfurization treatment are carried out before production to ensure that it is in The dimensional stability is good at high temperature, the secondary transverse shrinkage rate is close to zero, and the longitudinal shrinkage rate is 2‰-3‰. The modified PET film has strong surface adhesion, which improves the stability and reliability of product quality.

The graphene heating coating 302 is made by printing with graphene-based conductive ink. The graphene heating coating 302 is coated on the carrier 301, and is in the shape of a plurality of rectangular surfaces, and the width of each graphene heating coating 302 is 100-180 mm. Compared with the conductive ink of the whole piece, the arrangement of multiple strips is beneficial to graphene. The thickness uniformity of the heating coating 302 achieves stable graphene heating resistance, thereby improving graphene far-infrared normal emissivity and electrothermal radiation conversion efficiency.

As a preferred embodiment, the graphene heat-generating coating 302 is covered with a polymer insulating film 303 by thermocompression. The outer surface of the polymer insulating film 303 is coated with a PET film of fumed aluminum oxide, and subjected to high-pressure surface treatment. The temperature is 140-150 ℃, and the high temperature lamination makes it have strong anti-peeling force, high pressure breakdown resistance, and also prolongs the service life of the product.

Both ends of each graphene heating coating 302 are provided with silver electrode strips 304, which can increase the electrode stability of each graphene heating coating 302, and facilitate monitoring of the impedance of a single graphene heating coating 302 in the subsequent production process. , to ensure the stability of the impedance.

A graphene strip 305 is arranged between the silver electrode strip 304 and the carrier 301. The graphene strip 305 can block the direct contact between the silver electrode strip 304 and the PET substrate of the carrier 301, which can prevent the vulcanization reaction between the two and provide guarantee for the quality of the product , while extending the service life of the product.

The graphene heating coating 302 is also provided with an electrode connecting section 306, the width of the electrode connecting section 306 is 3-30mm, and the electrode connecting section 306 connects the graphene heating coating 302 in parallel to achieve an integral product, and the back-end process can be based on Different product lengths can be arbitrarily cut to achieve a multi-purpose film.

The upper surface of the electrode connection section 306 is provided with an electrode current-carrying strip 307, and the polymer insulating film 303 is covered on the upper surface of the electrode current-carrying strip 307. The electrode current-carrying strip 307 is made of conductive copper foil with low resistance, and the graphene heating coating 302 is used. An electrode current-carrying bar 307 is provided at both ends, respectively: a left electrode current-carrying bar and a right-electrode current-carrying bar, and the left electrode current-carrying bar and the right electrode current-carrying bar are connected to the electrode hole 31 (specifically, the metal ring buckle 32 ) is electrically connected, thereby ensuring that each graphene heating coating 302 is electrically connected to the electrode rod 11. The left electrode current-carrying bar and the right electrode current-carrying bar are respectively electrically connected to the electrode connecting sections 306 at both ends of the graphene heating coating 302, so as to ensure that the graphene heating coating 302 is connected in parallel with each other, which can improve the load force at both ends of the graphene heating film. Within the standard power range, the safe current carrying capacity of the graphene heating membrane electrode end is increased to improve the safety of the product.

As a preferred embodiment, both ends of each graphene heating coating 302 are provided with a plurality of evenly distributed square holes 3021, so that the impedance of each graphene heating coating 302 can be within the standard range during the production process, At the same time, the contact surface between the graphene heating coating 302 and the electrode current-carrying bar 307 and the silver electrode 304 is increased, and the safe current-carrying is more reliable.

As a preferred embodiment, a heat reflection layer 308 is further provided between the carrier 301 and the graphene heating coating 302 , which is equivalent to that the graphene heating coating 302 is coated on the heat reflection layer 308 . As shown in FIG. 6 , the heat reflection layer 308 includes a first insulating layer 3081 , a metal foil layer 3082 and a second insulating layer 3083 . The metal foil layer 3082 is arranged between the first insulating layer 3081 and the second insulating layer 3083, the first insulating layer 3081 is arranged between the carrier 301 and the metal foil layer 3082 for connecting the carrier 301 and the metal foil layer 3082, and the second insulating layer 3081 is arranged between the carrier 301 and the metal foil layer 3082. The insulating layer 3083 is disposed between the metal foil layer 3082 and the graphene heat-generating coating 302 for connecting the metal foil layer 3082 and the graphene heat-generating coating 302 . By setting the metal foil layer 3082 to reflect heat and infrared rays, the heat is prevented from diffusing from below the graphene heating coating 302, and the heat generated by the graphene heating coating 302 is concentrated and diffused from above to the environment requiring heat, avoiding Causes a lot of waste of heat. In the embodiment of the present invention, the metal foil layer 3082 is preferably an aluminum foil layer or a silver foil layer, and the aluminum foil layer or the silver foil layer has good flexibility and ductility, which ensures that the graphene heating film has a certain flexibility and is convenient for winding. In the embodiment of the present invention, both the first insulating layer 3081 and the second insulating layer 3083 are preferably polyimide film layers, and the polyimide film layers have good insulating properties and flexibility, which can not only ensure that the graphene heating film has A certain flexibility is convenient for rolling and winding, and it can also assist the adhesion between the carrier 301 , the metal foil layer 3082 and the graphene heating coating 302 .

As a preferred embodiment, between the graphene heating coating 302 and the polymer insulating film 303, a heat storage slow-release layer 309 is further provided, and the heat storage slow-release layer 309 has the function of accumulating heat and slowly releasing it to maintain the graphene Efficacy of heat generating coating 302 for constant heat generation.

As a preferred embodiment, the carrier 301 is a modified PET film, and the polymer insulating film 303 is a PET film. The PET film can withstand higher temperature and wear resistance. At the same time, the PET film also has better flexibility and elasticity, which is convenient for rewind. In this embodiment, the surface of the polymer insulating film 303 is coated with fumed alumina. Coated with fumed alumina, the polymer insulating film 303 has strong anti-peeling force, withstands high voltage breakdown, and also prolongs the service life of the product.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as limiting the scope of the present invention. It should be pointed out that for those of ordinary skill in the art, some modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for this utility model shall be subject to the appended claims.

Claims (10)

1. The graphene heating film is characterized by comprising a carrier and a plurality of graphene heating coatings coated on the carrier in parallel, wherein a high-molecular insulating film is coated on the graphene heating coatings in a hot-pressing manner;

electrode strips are arranged at the bottoms of two ends of any graphene heating coating, the electrode strips are electrically connected with the graphene heating coating, and graphene strips for preventing the electrode strips from contacting with a carrier are arranged between the electrode strips and the carrier;

electrode current-carrying strips are further arranged at two ends of the graphene heating coating, the electrode current-carrying strips are sandwiched between the graphene heating coating and the polymer insulating film, and the plurality of graphene heating coatings arranged side by side are electrically connected with the electrode current-carrying strips;

electrode connecting sections are further arranged at two ends of any one of the graphene heating coatings, the electrode connecting sections are clamped between the graphene heating coatings and the electrode current carrying strips, and the graphene heating coatings arranged side by side are electrically connected with the electrode current carrying strips through the electrode connecting sections;

the graphene heating film is provided with at least one pair of electrode holes, the electrode holes are arranged at two ends of the graphene heating film respectively and penetrate through the graphene heating film, and when the electrode holes are sleeved with electrode rods, the electrode current-carrying strips are electrically connected with the electrode rods.

2. The graphene heating film according to claim 1, wherein an electrode buckle for buckling an electrode rod is further disposed at the electrode hole, and the electrode buckle is electrically connected to the electrode current carrier.

3. The graphene heating film according to claim 1, wherein a first heat reflective layer is further disposed between the carrier and the graphene heating coating, and the first heat reflective layer includes a first insulating layer, a metal foil layer, and a second insulating layer;

the metal foil layer is arranged between the first insulating layer and the second insulating layer, the first insulating layer is arranged between the carrier and the metal foil layer and used for connecting the carrier and the metal foil layer, and the second insulating layer is arranged between the metal foil layer and the graphene heating coating and used for connecting the metal foil layer and the graphene heating coating.

4. The graphene heating film according to claim 1, wherein a heat storage slow release layer is further disposed between the graphene heating coating layer and the polymer insulating film.

5. The graphene heating film according to claim 1, wherein the carrier is a modified PET film, the polymer insulating film is a PET film, and the surface of the PET film is coated with vapor phase aluminum oxide.

6. The graphene heating film according to claim 1, wherein a plurality of square holes are uniformly distributed at both ends of any one of the graphene heating coatings.

7. A graphene heating device is characterized by comprising a groove base, an upper cover and the graphene heating film of any one of claims 1 to 6, wherein the upper cover covers the groove base and is used for enclosing an accommodating cavity, and the graphene heating film is accommodated in the accommodating cavity;

the electrode carrier strip is characterized in that an electrode rod corresponding to the electrode hole is arranged in the groove of the groove base, and when the electrode hole is sleeved with the electrode rod, the electrode carrier strip is electrically connected with the electrode rod.

8. The graphene heating device according to claim 7, wherein four electrode rods are disposed in the groove of the groove base, and four electrode holes are disposed on the graphene heating film;

the graphene heating film is rectangular, and the four electrode holes are formed in four corners of the graphene heating film.

9. The graphene heating device according to claim 7, wherein a second heat reflecting layer is disposed on an inner wall of the groove base, the upper cover includes an insulating heat conducting layer and an anti-slip layer disposed on the insulating heat conducting layer, and when the upper cover is covered on the groove base, the insulating heat conducting layer faces the groove base.

10. The graphene heating device according to claim 7, wherein a plurality of graphene heating films are arranged in the groove of the groove base, the graphene heating coatings of the graphene heating films face the upper cover, and the graphene heating films are sequentially stacked and castellated and sleeved with the electrode rod.

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