Hair curling iron based on graphene heating

Abstract

The utility model discloses a curling iron based on graphene heating, which belongs to the technical field of curling iron and comprises an outer shell and a heating plate, the surface of the outer shell is cylindrical, the outer shell is hollow and forms a heating cavity, the heating plate is positioned in the heating cavity, and the surface of the heating plate is not in contact with the inner wall of the outer shell. Graphene heating layers are arranged on two surfaces of the heating plate; a connecting plug is arranged at one end of the heating plate; the two faces of the heating plate are each coated with an insulating coating, and the graphene heating layer is completely covered with the insulating coatings. A control resistor is arranged on the side, close to the connecting plug, of the graphene heating layer and embedded into the heating plate, and the two ends of the control resistor are electrically connected with the graphene heating layer and the connecting plug respectively. The curling iron has the advantages of light weight and energy conservation, can efficiently and uniformly curl hair, and is favorable for improving the hair curling effect.

Description

Technical Field

[0001] This utility model relates to the field of curling iron technology, specifically to a curling iron based on graphene heating. Background Technology

[0002] A curling iron is a handheld electronic device used to curl hair. It works by using electricity to generate heat in a heating element. This heat is conducted through the iron's casing to the hair curled around its surface. When the hair is heated, the hydrogen bonds within it develop a memory effect. When the hydrogen bond temperature reaches 120°C or higher, the hair sets, resulting in a physical curl on the curling iron's surface. Currently, curling irons use internal heating coils or PTC materials for heating. The heat is transferred to the casing through a metal heat-conducting plate that contacts the casing. The casing is typically made of insulating thermoplastic or heat-conducting plastic. Made of solid plastic, the curling iron heats the hair by transferring heat to the outer shell, which in turn heats the hair wrapped around it. However, due to structural factors, the metal heat-conducting plate and the outer shell cannot make complete and tight contact, which affects the heat transfer and causes uneven temperature distribution on the outer shell. This, in turn, affects the curling efficiency and makes the plastic shell of the curling iron age more easily. Furthermore, because the metal heat-conducting plate needs to be in close contact with the outer shell, the friction is relatively high when inserting the metal heat-conducting plate into the outer shell, making the curling iron difficult to assemble and affecting the production and assembly efficiency of the curling iron.

[0003] Based on the above, Chinese Patent No. CN211379973U discloses a curling iron using a graphene heating element, including a handle and a hollow curling body connected to the handle. The curling body has several heating supports installed inside, which are in contact with the inner wall of the curling body. The heating supports enclose an installation space, within which a graphene heating element is placed. Several first through holes communicating with the installation space are opened on the heating supports, and several second through holes opposite to the first through holes are opened on the curling body. A male connector is fixed to the curling body, and a female connector is fixed to the handle. Several conductive plugs are provided on the male connector, and the graphene heating element is electrically connected to the conductive plugs. Several conductive sockets for the conductive plugs to be inserted are provided on the female connector. A circuit board is provided inside the handle, and the circuit board is electrically connected to the conductive sockets. The male and female connectors are fixed by a locking assembly after mating.

[0004] When the aforementioned curling iron is powered on, it generates heat through a graphene heating element. The heat generated by the graphene heating element is transferred to the surface of the curling body through a heating bracket, thereby curling the hair wrapped around the surface of the curling body. However, the grooves on the surface of the heating bracket prevent it from making complete contact with the inner wall of the heating element, which can easily affect the efficiency of heat transfer. Furthermore, in order to make the surface of the heating bracket fit tightly against the inner wall of the heating element, the outer diameter of the heating bracket is usually matched with the inner diameter of the heating element. During the assembly of the curling iron, the friction is relatively large when the heating bracket is inserted into the heating element, which can easily affect the assembly efficiency of the curling iron. Therefore, there is still room for improvement in this curling iron. Utility Model Content

[0005] To address the technical deficiencies in the background technology, this utility model proposes a graphene-based heating curling iron, which solves the aforementioned technical problems and meets practical needs. The specific technical solution is as follows:

[0006] A graphene-based curling iron includes an outer shell and a heating plate. The outer shell has a cylindrical surface and a hollow interior forming a heating cavity. The heating plate is located inside the heating cavity and its surface does not contact the inner wall of the outer shell. Graphene heating layers are provided on both sides of the heating plate, and a connector is provided at one end of the heating plate.

[0007] As a further technical solution of this utility model, both sides of the heating plate are coated with an insulating coating, which completely covers the graphene heating layer.

[0008] As a further technical solution of this utility model, a control resistor is provided on the side of the graphene heating layer near the connector plug. The control resistor is embedded inside the heating plate, and the two ends of the control resistor are electrically connected to the graphene heating layer and the connector plug, respectively.

[0009] As a further technical solution of this utility model, a blank edge is provided between the edge of the graphene heating layer and the edge of the heating plate.

[0010] As a further technical solution of this utility model, the surface of the outer shell is provided with a plurality of striped grooves.

[0011] As a further technical solution of this utility model, the heating plate is provided with a connecting tube at one end near the connecting plug, the connecting plug is provided with a connecting pin matching the connecting tube on one side near the heating plate, and an external pin is provided on the other side.

[0012] As a further technical solution of this utility model, the connector is provided with a limiting protrusion on the side near the external pin.

[0013] As a further technical solution of this utility model, the edge of the connector plug is provided with a fixing buckle, and the inner wall of the outer shell is provided with a fixing groove that matches the fixing buckle.

[0014] The beneficial effects of this utility model are as follows:

[0015] This curling iron is powered by connecting to a power supply line via a connector plug. After being powered on, heat is released through the graphene heating layer on the surface of the heating plate. The heat is transferred to the outer shell through thermal convection and thermal radiation in the air inside the heating chamber, thereby curling the hair wrapped around the surface of the outer shell. The graphene heating layer can efficiently and evenly heat the outer shell, which can improve the curling effect. Furthermore, since the heating plate and the inside of the outer shell do not come into contact with each other, the curling iron is more efficient in the production and assembly process. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of a graphene-based curling iron.

[0017] Figure 2 This is a disassembly diagram of a graphene-based heating curling iron.

[0018] Figure 3 This is a cross-sectional view of a second embodiment of the heating plate of a graphene-based curling iron.

[0019] Figure 4 This is a schematic diagram of the structure of the outer shell of a graphene-based heating curling iron, representing a second embodiment.

[0020] Wherein: 1-outer shell, 11-heating cavity, 12-striped groove, 2-heating plate, 21-graphene heating layer, 22-insulating coating, 23-control resistor, 24-connecting tube, 3-connecting plug, 31-connecting pin, 32-external pin, 33-limiting protrusion, 34-fixing buckle. Detailed Implementation

[0021] The embodiments of this utility model will be described below with reference to the accompanying drawings and related examples. The embodiments of this utility model are not limited to the following examples, and this utility model relates to relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0022] like Figure 1 , 2As shown, a graphene-based curling iron includes an outer shell 1 and a heating plate 2. The outer shell 1 has a cylindrical surface and a hollow interior forming a heating cavity 11. The heating plate 2 is located inside the heating cavity 11 and its surface does not contact the inner wall of the outer shell 1. Both sides of the heating plate 2 are provided with graphene heating layers 21, and one end of the heating plate 2 is provided with a connecting plug 3.

[0023] The curling iron of this utility model mainly consists of an outer shell 1 and a heating plate 2. The outer shell 1 has a cylindrical surface shape, which facilitates the curling of hair and makes the curled hair wavy. The heating plate 2 is located in the heating cavity 11 inside the outer shell 1. The heating plate 2 is connected to a matching male or female connector through a connector plug 3, and then connected to a power supply line through the male or female connector to achieve power supply. The heating plate 2 has a control circuit and other structures inside. After the heating plate 2 is powered on, the current will flow through the graphene heating layer 21. The graphene heating layer 21 is preferably a graphene heating film. The graphene heating film has a working time of up to 10,000 hours and has high safety during operation. The graphene heating layer 21 is fixed to the surface of the heating plate 2 by adhesives and other materials. After the graphene heating layer 21 is powered on, it will release heat. The heat released by the graphene heating layer 21 will be transferred to the outer shell 1 through the heating cavity 11 by heat convection and heat radiation, thereby raising the surface temperature of the outer shell 1, and thus curling the hair wrapped on the surface of the outer shell 1.

[0024] It should be noted that during the curling process, the heat released by the graphene heating layer 21 is transferred to the outer shell 1 through the air in the heating chamber 11 via thermal convection and thermal radiation. This heat transfer method differs from the contact heat conduction in common curling irons. The air in the heating chamber 11 is isolated from the outside and heated to a relatively uniform temperature by the graphene heating layer 21. As a result, the inner wall of the outer shell 1 can absorb heat more evenly, making its surface temperature more uniform. This, in turn, evenly heats the hair wrapped around the surface of the outer shell 1, improving the curling effect. In addition, during the production and assembly process, since the heating plate 2 does not contact the inside of the outer shell 1, there is no friction between the surface of the heating plate 2 and the inner wall of the outer shell 1 when the heating plate 2 is inserted into the heating chamber 11. The heating plate 2 can be easily installed inside the outer shell 1, thereby improving the production and assembly efficiency of the curling iron by up to 3 times.

[0025] Furthermore, the outer shell 1 can be made of thermoplastic or thermosetting plastic with good heat resistance, reducing the manufacturing cost of the curling iron. Since the heating plate 2 and the interior of the outer shell 1 are not in contact, current is difficult to flow through the heating plate 2 to the outer shell 1. Therefore, the outer shell 1 can also be made of metal materials such as aluminum alloy, which can improve the efficiency of transferring heat from the heating chamber 11 to the surface of the outer shell 1, thereby improving the efficiency of curling hair. In addition, after the outer shell 1 is made of metal materials such as aluminum alloy, the end of the outer shell 1 needs to be equipped with a heat insulation pad made of plastic material. These heat insulation pads can make it easier for the operator to hold the curling iron during the hair curling process, and prevent the surface temperature of the outer shell 1 from being too high and causing burns.

[0026] In addition, conventional curling irons achieve heat conduction through the contact between the heating element and the outer shell. This method usually requires a heating element with a power greater than 30W, and the large number of metal heat-conducting plates inside the outer shell results in an excessive weight of the curling iron. In this invention, the heat released by the graphene heating layer 21 is transferred to the outer shell 1 through thermal convection and thermal radiation. The large number of metal heat-conducting plates inside the shell reduces the overall weight of the curling iron by about one-third. The power of the heating plate 2 during operation is about 10W or even lower, which can reduce energy consumption. Furthermore, the voltage and current are lower during operation, thereby improving the safety of the curling iron during the curling process.

[0027] like Figure 3 As shown, in the second preferred embodiment of the heating plate 2 of this utility model, both sides of the heating plate 2 are coated with an insulating coating 22. The insulating coating 22 completely covers the graphene heating layer 21. The insulating coating 22 can improve the safety of the curling iron. When the graphene heating layer 21 is working, it will generate current and heat. The insulating coating 22 can prevent short circuits between the graphene heating layer 21 and other components inside the curling iron due to contact. It can also avoid leakage caused by the metal outer shell 1 accidentally contacting the graphene heating layer 21, thus ensuring the safety of the curling iron. The insulating coating 22 can also serve as a protective structure on the surface of the graphene heating layer 21, preventing the graphene heating layer from being corroded by external impurities, thereby extending the service life of the graphene heating layer 21.

[0028] like Figure 3As shown, in a second preferred embodiment of the heating plate 2 of this utility model, a control resistor 23 is provided on the side of the graphene heating layer 21 near the connector 3. The control resistor 23 is embedded inside the heating plate 2, and its two ends are electrically connected to the graphene heating layer 21 and the connector 3, respectively. The control resistor 23 of this utility model is embedded inside the heating plate 2 through a buried resistor process. The control resistor 23 can adjust the current intensity flowing into the graphene heating layer 21, thereby adjusting the working power of the graphene heating layer 21. The working power of the graphene heating layer 21 determines the heating speed and the maximum heating temperature during the curling process of the curling iron. By adjusting the working power of the graphene heating layer 21 through the control resistor 23, the manufacturer can obtain a curling iron product with stable performance.

[0029] like Figure 1 , 2 As shown, in one of the preferred embodiments of this utility model, a blank edge is provided between the edge of the graphene heating layer 21 and the edge of the heating plate 2. The blank edge is the position on the surface of the heating plate 2 that is not covered by the graphene heating layer 21. The width of the blank edge is about 2mm. The blank edge is provided to allow the insulating coating 22 to better cover the graphene heating layer 21 completely. The width of the blank edge can also be used to adjust the distance between the edge of the graphene heating layer 21 and the inner wall of the outer shell 1, so as to avoid the distance between the edge of the graphene heating layer 21 and the inner wall of the outer shell 1 being too low and affecting the uniformity of heating.

[0030] like Figure 4 As shown, in the second preferred embodiment of the outer shell 1 of this utility model, a plurality of striped grooves 12 are provided around the surface of the outer shell 1. The plurality of striped grooves 12 on the surface of the outer shell 1 extend interlaced with each other. The striped grooves 12 can increase the surface area of ​​the outer shell 1, so that the surface of the outer shell 1 can come into contact with more hair, thereby improving the efficiency of the curling iron in curling the hair.

[0031] like Figure 1 , 2 As shown, in one of the preferred embodiments of this utility model, the heating plate 2 is provided with a connecting tube 24 near the connecting plug 3. The connecting plug 3 is provided with a connecting pin 31 that matches the connecting tube 24 on one side near the heating plate 2, and an external pin 32 on the other side. The connecting tube 24, the connecting pin 31, and the external pin 32 are all made of copper. The connecting plug 3 is electrically connected to the heating plate 2 by inserting the connecting pin 31 into the connecting tube 24. The curling iron is electrically connected to the power supply line through the external pin 32 and the external female connector, etc., so as to realize power supply. After being powered on, the curling iron can be used to curl the hair.

[0032] like Figure 1 , 2As shown, in one of the preferred embodiments of this utility model, the connector 3 is provided with a limiting protrusion 33 on the side near the external pin 32. The limiting protrusion 33 matches the external female connector. When the external pin 32 is inserted into the external female connector, the limiting protrusion 33 can prevent the external female connector from swinging relative to the external pin 32 under the action of external force, thereby preventing the external pin 32 from being broken under the action of external force.

[0033] like Figure 1 , 2 As shown, in one of the preferred embodiments of this utility model, the connecting plug 3 is provided with a fixing buckle 34 on its edge, and the inner wall of the outer shell 1 is provided with a fixing groove that matches the fixing buckle 34. During the production and assembly of the curling iron, the connecting plug 3 is fixed to the outer shell 1 by embedding the fixing buckle 34 into the fixing groove, so as to prevent the connecting plug 3 from falling out of the outer shell 1 and causing the heating plate 2 to be exposed.

[0034] In summary, the curling iron of this invention is powered by connecting the plug 3 to the power supply line. After being powered on, heat is released through the graphene heating layer 21 on the surface of the heating plate 2. The heat is transferred to the outer shell 1 through thermal convection and thermal radiation in the air in the heating cavity 11, thereby curling the hair wrapped around the surface of the outer shell 1. The graphene heating layer 21 can heat the outer shell 1 efficiently and evenly, which can improve the curling effect. Furthermore, since the heating plate 2 and the inside of the outer shell 1 do not contact each other, the curling iron is more efficient in the production and assembly process.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A graphene-based heating curling iron, comprising a shell (1) and a heating plate (2), characterized in that, The outer shell (1) has a cylindrical surface shape. The outer shell (1) is hollow inside and forms a heating cavity (11). The heating plate (2) is located inside the heating cavity (11). The surface of the heating plate (2) does not contact the inner wall of the outer shell (1). The heating plate (2) has a graphene heating layer (21) on both sides. The heating plate (2) has a connecting plug (3) at one end.

2. The graphene-based curling iron according to claim 1, characterized in that, The heating plate (2) is coated with an insulating coating (22) on both sides, and the insulating coating (22) completely covers the graphene heating layer (21).

3. The graphene-based curling iron according to claim 1, characterized in that, The graphene heating layer (21) has a control resistor (23) on the side near the connector (3). The control resistor (23) is embedded inside the heating plate (2). The two ends of the control resistor (23) are electrically connected to the graphene heating layer (21) and the connector (3), respectively.

4. The graphene-based curling iron according to claim 1, characterized in that, A blank edge is provided between the edge of the graphene heating layer (21) and the edge of the heating plate (2).

5. The graphene-based curling iron according to claim 1, characterized in that, The outer shell (1) has a plurality of striped grooves (12) around its surface.

6. The graphene-based curling iron according to claim 1, characterized in that, The heating plate (2) has a connecting tube (24) near the connecting plug (3) on one side, and a connecting pin (31) matching the connecting tube (24) is provided on the side of the connecting plug (3) near the heating plate (2), and an external pin (32) is provided on the other side.

7. The graphene-based curling iron according to claim 6, characterized in that, The connector (3) has a limiting protrusion (33) on the side near the external pin (32).

8. The graphene-based curling iron according to claim 1, characterized in that, The connector (3) has a fixing buckle (34) on its edge, and the inner wall of the outer shell (1) has a fixing groove that matches the fixing buckle (34).

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