A non-metallic material flat heating device

Abstract

The invention discloses a non-metallic material plane heating device, including a heating element assembly and an air duct structure assembly; the heating element assembly is fixed on the air duct structure assembly; the heating element assembly is composed of a non-metallic conductive heating material, a high temperature adhesive and a high temperature resistant insulating material mixed and prepared according to the resistance value; the non-metallic conductive heating material includes graphene and PI carbon fiber, and the heating temperature is greater than 200°C; the air duct structure assembly has two mutually insulated conductive silver electrodes; the heating element assembly is connected to the conductive silver electrode of the air duct structure assembly; the heating element assembly is sequentially provided with an insulating protective layer, a heating layer and an insulating fixing layer; the thickness of the heating layer is 0.001 to 1 mm; the heating temperature of the heating layer can be adjusted from room temperature to 600°C; the heating element assembly converts electrical energy into thermal energy. Moreover, the air can fully contact the heating surface of the non-metallic conductive heating material, the wind speed is faster, and the heat is increased more; the heat conversion efficiency is high, the heat loss is small, and energy is saved.

Description

Technical Field

[0001] The invention relates to a heating device, in particular to a non-metallic plane heating device. Background Art

[0002] In daily life, hair dryers, fans, electric heaters and other equipment cannot do without heating elements. The heating elements of the hair dryers commonly seen on the market are mainly made of iron-chromium wire or nickel-chromium wire. Such heating elements have low heating efficiency, are easily oxidized and deformed, and have a short lifespan. The maximum temperature resistance of iron-chromium wire or nickel-chromium wire can reach 1100℃, and it is easy to produce open flames when the safety protection fails, and the safety performance is low.

[0003] After searching, it is found that general surface heating materials and structures, such as patent number CN200520015978.1, straight cylindrical ring type, and straight cylindrical air outlet rib type, the air outlet blows parallel to the heating surface, and the heat generated by the heating surface cannot be effectively taken away, resulting in low air outlet temperature that cannot meet the hot air blowing requirements.

[0004] Therefore, it is necessary to design a new non-metallic material flat heating device. Different from the heating method of heating wire, it can utilize non-metallic conductive heating materials to generate heat, and directly convert electrical energy into thermal energy through conduction; the air and the heating surface of the non-metallic conductive heating material can be fully in contact, the wind speed is faster, and the heat is increased more; the heat conversion efficiency is high, the heat loss is small, and energy is saved. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a non-metallic material flat heating device, which can utilize non-metallic conductive heating materials to generate heat and directly convert electrical energy into thermal energy by means of conduction; the air and the heating surface of the non-metallic conductive heating material can be fully in contact, the wind speed is faster, and the heat is increased more; the heat conversion efficiency is high, the heat loss is small, and energy is saved.

[0006] In order to solve the above technical problems, the present invention provides a non-metallic material planar heating device, including a heating element assembly and an air duct structure assembly; the heating element assembly is fixed on the air duct structure assembly; the heating element assembly is composed of a non-metallic conductive heating material, a high-temperature adhesive and a high-temperature resistant insulating material mixed and prepared according to the resistance value; the non-metallic conductive heating material contains graphene and PI carbon fiber, and the heating temperature of the non-metallic conductive heating material is greater than 200°C; the air duct structure assembly has two mutually insulated conductive silver electrodes; the heating element assembly is connected to the conductive silver electrode of the air duct structure assembly; the heating element assembly is sequentially provided with an insulating protective layer, a heating layer and an insulating fixing layer; the thickness of the heating layer is set to 0.001~1mm; the heating temperature of the heating layer can be adjusted in the range of: room temperature~600°C; after the heating element assembly is powered on, the electrical energy is directly converted into thermal energy, and the conversion efficiency is greater than 60%.

[0007] Preferably, the heating element assembly can emit far infrared rays which are beneficial to the human body, and the wavelength of the far infrared rays is 4 to 15 um.

[0008] Preferably, the fixing methods of the heating element assembly and the air duct structure assembly include coating, spraying, printing and interlayer; at least one side of the heating element assembly is provided with a non-metallic conductive heating material coating; the difference between the wind resistance of the heating wire method and the wind resistance of the air duct structure assembly is at least 20%, and the air is in full contact with the air duct assembly and the heating element assembly.

[0009] Preferably, the air duct structure component is composed of metal or ceramic material; a compressed air duct structure is arranged in the air duct structure component, and the shapes of the compressed air duct structure include arc form, convex form, L form, S form, lotus funnel form, rotating sinusoidal wave form, diamond form, wedge form, V-shaped compression type, multi-layer type, multi-layer funnel type, multi-layer flower type, multi-layer staggered honeycomb type, multi-layer wave type, spiral blade type, and multi-layer bowl type.

[0010] Preferably, a protruding portion for guiding air and improving heating efficiency is provided on the outer wall of the compression air duct structure, and the protruding portion is composed of a plurality of protrusions arranged in a circular array along the outer wall of the compression air duct structure; the outer surface of each protrusion is coated with the non-metallic conductive heating coating.

[0011] Preferably, the protrusions include elongated protrusions, arc-shaped protrusions, S-shaped protrusions, L-shaped protrusions and straight-inserted inclined-surface protrusions; the protrusions cooperate with the air duct structural components to form an air guide duct.

[0012] Preferably, the non-metallic material planar heating device comprises a heating element fixing assembly, wherein the heating element fixing assembly is arranged between the heating element assembly and the air duct structure assembly; the heating element fixing assembly comprises a fixing part and a fixing bracket.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The heating element assembly in the present invention utilizes a non-metallic conductive heating coating to generate heat for cold air. The non-metallic conductive heating coating in the heating element assembly can be manufactured by spraying, printing, and coating, and can also be fixed by a sandwich method. The electrical energy is directly converted into thermal energy by conductive means, and the thermal conversion efficiency is significantly improved, and the manufacturing process can be simplified.

[0015] 2. The present invention uses air duct structural components to change the direction of air flow, ensure that the air flow is rotated and compressed in the air duct, and at the same time closely adheres to the surface of the non-metallic conductive heating material to form mixed heating, effectively taking away the heat generated by the non-metallic conductive heating material, significantly increasing the air outlet temperature, and achieving a rapid air drying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the technical description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the heating element assembly;

[0018] Figure 2~Figure 6 Schematic diagram of the structure of protrusions of different shapes;

[0019] Figure 7 to Figure 20 Schematic diagram of compressed air duct structures of different shapes;

[0020] Fig.21 It is a schematic diagram of the assembly of a flat heating device made of non-metallic materials;

[0021] Fig. 22 It is a schematic diagram of the structure of the heating element fixing assembly;

[0022] Fig.23 This is a schematic diagram of a flattened non-metallic conductive heating material with a diameter of 1 mm;

[0023] Fig.24 Schematic diagram of the air-inlet mixing heating process of a flat heating device for non-metallic materials.

[0024] Among them, 101-insulating protective layer, 102-heating layer, 103-insulating fixing layer, 104-air duct structure component fixing layer, 105-non-metallic conductive heating material;

[0025] 106-L-shaped protrusion, 107-S-shaped protrusion, 108-straight-inserted inclined protrusion, 109-fancy funnel shape, 110-rotating sinusoidal waveform, 111-diamond shape, 112-wedge shape, 113-V-shaped compression type, 114-multi-layer type, 115-multi-layer funnel type, 116-multi-layer fancy type, 117-multi-layer staggered honeycomb type, 118-multi-layer wave type, 119-spiral blade type, 120-multi-layer bowl type; 121-spiral blade solid type, 122-spiral surface petal type.

[0026] Heater fixing assembly, 2-heater group, 3-raised portion, 21-heater assembly, 23-air duct structure assembly 23, 30-second bending portion, 31-fixed bracket, 32-first bending portion, 33-temperature control switch, 34-fixing part, 35-fuse, 36-cavity, 37-second supporting plate, 38-first supporting plate. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0028] Reference Figure 1 to Figure 24 As shown, the present invention discloses a non-metallic material planar heating device, comprising:

[0029] The heating element assembly 21 and the air duct structure assembly 23. The heating element assembly 21 is fixed on the air duct structure assembly 23.

[0030] The heating element assembly is composed of a non-metallic conductive heating material, a high temperature adhesive and a high temperature resistant insulating material, which are mixed and formulated into a required resistance value.

[0031] The above-mentioned non-metallic conductive heating material includes carbon materials such as graphene and PI carbon fiber, and its heating temperature can exceed 200°C.

[0032] The air duct structure component has two mutually insulated conductive silver electrodes, and the heating element component is connected to the conductive silver electrodes of the air duct structure component.

[0033] The heating element assembly is provided with an insulating protective layer 101, a heating layer 102 and an insulating fixing layer 103 in sequence. The thickness of the heating layer 102 is set to 0.001~1mm, and the heating temperature of the heating layer 102 can be adjusted in the range of room temperature~600℃. The thickness of the heating layer is adjusted according to different heating resistance values. The heating layer 102 is made of a non-metallic conductive heating material, and the heating layer 102 is attached to the insulating fixing layer 103. After the heating element assembly is powered on, the non-metallic conductive heating material 105 can be used to directly convert electrical energy into thermal energy, and the conversion efficiency can reach more than 60%.

[0034] Preferably, the heating element assembly 21 simultaneously radiates 4 to 15 micron far infrared rays which are beneficial to the human body and have the effects of improving immune function, hair care, beauty, improving blood circulation and other health care and therapeutic effects.

[0035] Preferably, the above-mentioned non-metallic conductive heating material 105 has a higher heating efficiency than the traditional PTC heating wire and MCH ceramic heating body.

[0036] Assume that the heating wire has a diameter of 1 mm and a length of L. Only the surface is the effective heating surface, so the effective heating area is 3.14L.

[0037] If the non-metallic conductive heating material 105 with a diameter of 1 mm is flattened into several layers of heating layers 102 with a thickness of 10 um, and roughly calculated as 50 layers, the heating area = 3.14L + 3.14* (1-0.01) + 3.14* (1-0.02) + 3.14* (1-0.03) +......, as can be seen from the above estimation, the 1 mm non-metallic conductive heating material 105 heating layer 102 (and double-sided heating) has an effective heating area much larger than the 1 mm diameter heating wire, and its heating efficiency is higher.

[0038] At least one side of the heating element assembly 21 is provided with a non-metallic conductive heating material coating. The heating element assembly 21 and the air duct structure assembly 23 can be bonded and fixed by coating, spraying, printing and other processes, and can also be fixed by interlayer. The air duct structure assembly has a wind resistance of more than 20% less than the electric heating wire method, and the air and the air duct are in full contact, the temperature rise is fast, the heat loss is small, the heat conversion efficiency is high, and energy is saved. It can be used for hair dryers, electric heaters, dryers, air conditioners, heaters, water heaters and other products, and can also be used in other low-voltage heating occasions.

[0039] The air duct structure component is made of metal or ceramic material, and a compression air duct structure is arranged inside the air duct structure component.

[0040] The shapes of the above-mentioned compression air duct structure include but are not limited to arc form, convex form, L form, S form, lotus funnel form 109, rotating sinusoidal wave form 110, diamond form 111, wedge form 112, V-shaped compression form 113, multi-layer form 114, multi-layer funnel form 115, multi-layer fancy form 116, multi-layer staggered honeycomb form 117, multi-layer wave form 118, spiral blade form 119, multi-layer bowl form 120, spiral blade solid form 121, and spiral surface petal form 122.

[0041] Preferably, other similar shapes are also within the scope of protection of this patent.

[0042] The above-mentioned compressed air duct structure can change the direction of air outlet, causing the air to rotate and compress in the air duct, close to the non-metallic conductive heating material, forming mixed heating, effectively taking away the heat generated by the non-metallic conductive heating material, significantly increasing the air outlet temperature, achieving the effect of hot air drying hair, making the wind speed faster and the heating element more practical.

[0043] The multi-layer type 114 may have two or more layers.

[0044] A protrusion 3 for guiding air and improving heating efficiency is protruded from the outer wall of the compression air duct structure. The protrusion 3 is composed of a plurality of protrusions arranged in an array along the circumference of the outer wall of the compression air duct structure. The outer surface of each protrusion is coated with a non-metallic conductive heating coating.

[0045] The protrusions 3 include but are not limited to long strip protrusions, arc-shaped protrusions, S-shaped protrusions 107, L-shaped protrusions 106 and straight-inserted inclined-surface protrusions 108. The protrusions 3 cooperate with the air duct structural component 23 to form an air guide duct.

[0046] Preferably, the raised portion 3 can increase the contact area between the air outlet and the non-metallic conductive heating material 105, thereby improving the heating efficiency and reducing noise.

[0047] The heating element fixing component 1 is disposed between the heating element component 21 and the air duct structure component 23 , and can fix the heating element component 21 and the air duct structure component 23 .

[0048] The heating element fixing assembly 1 comprises a fixing member 34 and a fixing bracket 31. The fixing member 34 is sleeved on the air duct structure assembly 23, and a cavity 36 matching the air duct structure assembly 23 is provided on the fixing member 34. The first and second bending portions 32 and 30 are respectively provided at the head and tail ends of the fixing bracket 31, the first bending portion 32 is riveted on the fixing member 34, and the second bending portion 30 is clamped on the side wall end of the heating element assembly 21, so that the connection between the heating element fixing assembly 1 and the heating element group 2 is stable and highly reliable.

[0049] A first support plate 38 and a second support plate 37 are provided at the end of the fixing member 34 in the axial direction. A temperature control switch 33 for controlling the temperature of the heating element is riveted on the first support plate 38. A fuse 35 for protecting against excessive current is riveted on the second support plate 37. The heating element assembly 21 is provided with good safety protection, so that the temperature of the heating element assembly 21 is not too high, and the safety performance is high.

[0050] Reference Fig.24 , which is the incoming air mixing heating process of the flat heating device.

[0051] Preferably, when the positive and negative electrodes are energized, the non-metallic conductive heating material 105 can be energized to generate heat. When cold wind blows through the non-metallic conductive heating material 105, the cold wind can fully contact the heating surface and become hot wind to be blown out. The outer surface of the protrusion 3 is coated with a non-metallic conductive heating coating so that the coating area is increased, more heat is generated, and it can play a role in guiding the wind, making the wind speed faster. The fuse 35 protects against excessive current, and the temperature control switch 33 controls the heating element to provide better safety protection, so that the temperature of the non-metallic flat heating element should not be too high, and the safety performance is better.

[0052] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novelties disclosed herein.

Claims

1. A non-metallic flat heating device, characterized in that: include: A heating element assembly and an air duct structure assembly; the heating element assembly is fixed on the air duct structure assembly; the heating element assembly is composed of a non-metallic conductive heating material, a high-temperature adhesive and a high-temperature resistant insulating material mixed and prepared according to resistance values; the non-metallic conductive heating material comprises graphene and PI carbon fiber, and the heating temperature of the non-metallic conductive heating material is greater than 200°C; two mutually insulated conductive silver electrodes are arranged on the air duct structure assembly; the heating element assembly is connected to the conductive silver electrodes of the air duct structure assembly; the heating element assembly is sequentially provided with an insulating protective layer, a heating layer and an insulating fixing layer; the thickness of the heating layer is set to 0.001~1mm; the heating temperature of the heating layer can be adjusted in the range of: room temperature~600°C; after the heating element assembly is powered on, the electrical energy is directly converted into thermal energy, and the conversion efficiency is greater than 60%; The heating element assembly can emit far infrared rays that are beneficial to the human body, and the wavelength of the far infrared rays is 4 to 15 μm; at least one side of the heating element assembly is provided with a non-metallic conductive heating material coating; The air duct structure component is composed of metal or ceramic material; a compression air duct structure is arranged in the air duct structure component, and the shape of the compression air duct structure includes one of arc form, convex form, L form, S form, lotus funnel form, rotating sine wave form, diamond form, wedge form, V-shaped compression form, multi-layer funnel form, multi-layer flower form, multi-layer staggered honeycomb form, multi-layer wave form, rotary blade form, multi-layer bowl form, rotary blade solid form and rotary surface petal form; A protrusion is protruded on the outer wall of the compression air duct structure for guiding air and improving heating efficiency, and the protrusion is composed of a plurality of protrusions arranged along the circumference of the outer wall of the compression air duct structure; the outer surface of each protrusion is coated with the non-metallic conductive heating material coating; The protrusions include one of a long strip protrusion, an arc-shaped protrusion, an S-shaped protrusion, an L-shaped protrusion and a straight-inserted inclined-surface protrusion; the protrusions cooperate with the air duct structural component to form an air guide duct; The non-metallic material planar heating device also includes a heating element fixing component, which is arranged between the heating element fixing component and the air duct structure component. The heating element fixing component includes a fixing piece and a fixing bracket. The fixing piece is sleeved on the air duct structure component. The fixing piece is provided with a cavity that matches the air duct structure component. The first and second bending parts are respectively provided at the head and tail ends of the fixing bracket. The first bending part is riveted on the fixing piece, and the second bending part is clamped on the side wall end of the heating element component. The end of the fixing piece is extended along the axial direction to provide a first supporting plate and a second supporting plate. A temperature control switch for controlling the temperature of the heating element is riveted on the first supporting plate, and a fuse for protecting against excessive current is riveted on the second supporting plate.

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