CN212163743U - Annular multi-fin carbon heating device and electric appliance - Google Patents

Abstract

The utility model provides an annular many wings carbon heating device and electrical apparatus. The device comprises a tubular carbon heater, an annular fin radiator and an insulating heat conduction layer, wherein the annular fin radiator is sleeved on the outer wall of the tubular carbon heater, and the insulating heat conduction layer is positioned between the annular fin radiator and the tubular carbon heater; and a carbon layer containing graphene materials is arranged on the tubular carbon heater. Because the tubular carbon heater has a large heating area, the annular fin radiator has a large heat transfer area to fully transfer heat generated by the tubular carbon heater, so that the air outlet temperature of the heating device is stable and uniform, and the problem that the air outlet temperature is low when the air quantity is overlarge in the existing heating device adopting resistance wires to heat is solved; when the air quantity is too small, the air outlet temperature is too high.

Description

Annular multi-fin carbon heating device and electric appliance

Technical Field

The utility model belongs to the technical field of the electrothermal device technique and specifically relates to indicate many wings of annular carbon pyrogenic device and electrical apparatus.

Background

In the field of common electronic industry manufacturing, a hot air gun and a hot air table are common tools for welding and picking up elements. The existing hot air gun mainly utilizes hot air blown out from a gun core of a heating resistance wire to weld and pick up elements. The hot air gun is one of the most used tools in the maintenance of mobile phones and computer mainboards, but the process requirement for the use of the hot air gun is high. In different occasions, special requirements are required on the temperature, the air quantity and the like of the hot air gun, the cold joint of elements can be caused when the temperature is too low, and the worst elements and circuit boards can be caused when the temperature is too high. After the power is on, the temperature of the hot air gun rises linearly, and the element and the circuit board can be burned out without worry. In order to avoid burning out the components and the circuit board, the air quantity can be increased, but the components can be blown away or the positioning is inaccurate due to the excessive air quantity. The reason why the temperature rises linearly after the hot air gun is electrified is as follows: the heating resistance wire directly carries out heat convection with air. When the air quantity is too small, the heat of the heating resistance wire is difficult to be fully conducted; when the air quantity is too large, the heating resistance wire is excessively cooled, and the heating efficiency is low, so that the defects of unstable temperature exist in the prior hot air gun and hot air platform equipment in use.

The existing consumer electronics, hair dryer, is also composed of a set of heating wires and a high-speed and small fan. When the fan is powered on, the heating wire generates heat, and the air blown out by the fan passes through the heating wire at high temperature to form hot air. The defects of the hot air gun and the hot air platform are the same, and when the air quantity is overlarge, the air outlet temperature is low; when the air volume is too small, the air outlet temperature is too high, and further discomfort is caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the problem that the air outlet temperature is low when the air quantity is too large in the existing heating device adopting the resistance wire to generate heat is solved; when the air quantity is too small, the air outlet temperature is too high.

In order to solve the technical problem, the utility model discloses a technical scheme be:

an annular multi-fin carbon heating device comprises a tubular carbon heater, an annular fin radiator and an insulating heat conduction layer, wherein the annular fin radiator is sleeved on the outer wall of the tubular carbon heater, and the insulating heat conduction layer is positioned between the annular fin radiator and the tubular carbon heater; and a carbon layer containing graphene materials is arranged on the tubular carbon heater.

Furthermore, a supporting pipe is further arranged on the tubular carbon heater, and the carbon layer is uniformly attached to the side wall of the supporting pipe.

Further, a ceramic insulating layer is further arranged on the tubular carbon heater, the supporting tube is a stainless steel tube, and the ceramic insulating layer is located between the stainless steel tube and the carbon layer.

Further, still be provided with ceramic seal layer on the tubular carbon heater, the carbon-layer is located ceramic insulating layer with between the ceramic seal layer, and ceramic insulating layer's border with ceramic seal layer's border sealing connection.

Further, the ring fin radiator is composed of a round tube part and a convex part; the convex part is composed of at least two bulges, and the bulges are positioned on the outer wall of the round pipe part and are radially arranged; the round pipe part is coaxial with the tubular carbon heater. The bulge part is in a ring-shaped fin shape, namely a ring fin of the ring fin radiator.

Furthermore, the insulating heat conduction layer is formed by filling insulating heat conduction filling materials, and blocking portions used for blocking the filling materials from falling off are arranged on end faces of two ends of the insulating heat conduction layer.

Furthermore, the blocking part is composed of an annular insulating space ring and an annular gasket, and the annular gasket is sleeved on the outer wall of the annular insulating space ring; and the outer wall of the annular insulating space ring is also provided with an annular boss matched with the annular gasket.

Further, the carbon layer is made of graphene material mixed with auxiliary carbon material, and the auxiliary carbon material is formed by mixing carbon nanotube mixture material or carbon nanotube material, conductive carbon black mixture material or conductive carbon black material.

Further, the filling material is one or more of quartz sand, aluminum oxide and magnesium oxide; the ring fin radiator is made of aluminum material; the annular insulating space ring is made of ceramic or asbestos materials; the ceramic sealing layer and the ceramic insulating layer are both made of aluminum oxide nano ceramic materials.

An electric appliance comprises the annular multi-fin carbon heating device, wherein a fan is arranged beside the annular multi-fin carbon heating device, and the fan and the annular multi-fin carbon heating device are coaxial; the electric appliance comprises a hot air table, a hot air gun, an electric hair drier and a warmer.

The beneficial effects of the utility model reside in that: because the tubular carbon heater has a large heating area, the annular fin radiator has a large heat transfer area to fully transfer heat generated by the tubular carbon heater, so that the air outlet temperature of the heating device is stable and uniform, and the problem that the air outlet temperature is low when the air quantity is overlarge in the existing heating device adopting resistance wires to heat is solved; when the air quantity is too small, the air outlet temperature is too high.

Drawings

The following detailed description of the specific structure of the present invention with reference to the accompanying drawings

Fig. 1 is a schematic end view of an annular multi-fin carbon heating device according to the present invention;

fig. 2 is a schematic cross-sectional view of an axis of a ring-shaped multi-fin carbon heating device according to the present invention;

fig. 3 is a schematic cross-sectional layered structure diagram of a tubular carbon heater of an annular multi-fin carbon heating device according to the present invention;

fig. 4 is a schematic view of a sectional layered structure of the outer wall of the tubular carbon heater of the annular multi-fin carbon heating device of the present invention;

wherein, 1-tubular carbon heater, 11-carbon layer, 12-support tube, 13-ceramic insulating layer, 14-ceramic sealing layer; 2-ring fin radiator, 21-convex part, 22-round pipe part; 3-insulating heat conduction layer, 4-annular gasket, 5-annular insulating spacer ring and 51-annular boss.

Detailed Description

The utility model discloses the most crucial design lies in: the tubular carbon heater with a large heating area is adopted, heat is fully conducted through the annular fin radiator, a large heat transfer area is formed, and the purpose of stable and uniform air outlet temperature is further achieved.

In order to further explain the feasibility of the inventive concept, the detailed embodiments of the technical contents, the structural features, the objects and the effects according to the invention are described in detail with reference to the accompanying drawings.

Example 1

Referring to fig. 1 and 2, an annular multi-fin carbon heating device includes a tubular carbon heater 1, an annular fin radiator 2 and an insulating heat conduction layer 3, wherein the annular fin radiator 2 is sleeved on an outer wall of the tubular carbon heater 1, and the insulating heat conduction layer 3 is located between the annular fin radiator 2 and the tubular carbon heater 1; a carbon layer 11 containing a graphene material is arranged on the tubular carbon heater 1; the center of the tubular carbon heater 1 is a cylindrical cavity.

The electrothermal conduction mechanism of the thin film carbon layer 11 made of graphene material is: according to the percolation theory, the two-dimensional nano graphene sheet-like materials are linked to each other in the carbon layer 11 to form a conductive network through which electrons move inside the coating. When the distribution of the graphene sheet-like material in the thin-film carbon layer 11 reaches a critical value, called a percolation threshold, a conductive network starts to be formed and the conductivity of the thin-film carbon layer 11 starts to increase sharply.

The C atom in the graphene is sp²The hybrid orbit exists in the form of free electrons, and the electrons can move freely in the graphene plane, so that the theoretical conductivity of the hybrid orbit is very good. The two-dimensional nano films are mutually overlapped to form a macroscopic film carbon layer 11, Schottky barriers exist at contact positions, the tunneling effect of current carriers at the overlapping positions is weak, and contact resistance is generated as a result, which is the basis for taking graphene as an electrothermal material.

After voltage is connected to two ends of the film-shaped carbon layer 11, namely one end of the tubular carbon heater 1 is connected to the anode power line, and the other end is connected to the cathode power line, free electrons in the graphene move directionally under the action of an electric field. Free electrons collide with carbon atoms, C atoms in graphene generate phonons, ions and electrons in a resistor, generated carbon molecular groups rub and collide with each other (also called Brownian motion) to generate heat energy, the heat energy is uniformly radiated in a planar mode through far infrared rays with the wavelength controlled within 5-14 micrometers, and the total conversion rate of the electric heat energy reaches over 99%. Meanwhile, the film-like carbon layer 11 has stable heat generation performance due to superconductivity and excellent thermal conductivity of the graphene material.

Graphene heat transfer mainly depends on lattice vibration (namely phonons and photons), the essence of lattice vibration is thermal motion of microscopic particles (molecules, atoms and ions), and the energy of lattice vibration waves (lattice waves) is quantized and the motion change is in a transition mode according to the motion law of quantum mechanics. The lattice vibration wave can be divided into two types; the energy of the optical frequency lattice vibration wave is weak when the temperature is low, and the audio frequency lattice vibration wave is a main contributor of heat transfer; as the temperature increases, the energy of the lattice vibration wave of optical frequencies increases, and the contribution to heat transfer increases, with increasingly stronger thermal radiation being generated, which is the direct transfer of energy to particles in matter-converted to heat by dipole rotation and ionic conduction. Therefore, the thin-film carbon layer 11 made of graphene material has a planar heat generation characteristic.

Because the tubular carbon heater 1 has a large heating area, the annular fin radiator 2 has a large heat transfer area to fully transfer the heat generated by the tubular carbon heater 1, so that the air outlet temperature of the heating device is stable and uniform, and the problem that the air outlet temperature is low when the air quantity of the existing heating device adopting resistance wires to heat is too large is solved; when the air quantity is too small, the air outlet temperature is too high. The ring fin radiator 2 is made of a material with electric conductivity, and if the formed carbon layer 11 is directly contacted with the ring fin radiator 2, the heating performance of the carbon layer will be affected, so that an insulating heat-conducting layer with good insulating performance and good heat-conducting performance is arranged between the carbon layer 11 and the ring fin radiator 2.

Further, referring to fig. 3 and 4, a support tube 12 is further disposed on the tubular carbon heater 1, and the carbon layer 11 is uniformly attached to a side wall of the support tube 12. The support tube 12 serves to support and protect the film-like carbon layer 11.

Further, a ceramic insulating layer 13 is further arranged on the tubular carbon heater 1, the supporting tube 12 is a stainless steel tube, and the ceramic insulating layer 13 is located between the stainless steel tube and the carbon layer 11. Preferably, the stainless steel pipe is 2Cr13 stainless steel pipe with high thermal conductivity, oxidation resistance and good shock absorption. The 2Cr13 stainless steel pipe has better corrosion resistance in weak corrosive medium and has enough corrosion resistance to fresh water, seawater, steam and air. When the carbon layer is processed, the tubular carbon layer 11 formed by coating on the stainless steel pipe can generate heat by connecting the positive and negative electrodes of the power supply to the end faces of the two ends of the carbon layer respectively and electrifying the carbon layer. Since the stainless steel pipe itself is a good conductor and the formed carbon layer 11 directly attached to the stainless steel pipe affects the heat generation performance of the carbon layer 11, a ceramic insulating layer 13 having a good insulating performance is provided between the carbon layer 11 and the wall of the stainless steel pipe.

Further, a ceramic sealing layer 14 is further arranged on the tubular carbon heater 1, the carbon layer 11 is located between the ceramic insulating layer 13 and the ceramic sealing layer 14, and the edge of the ceramic insulating layer 13 is connected with the edge of the ceramic sealing layer 14 in a sealing manner. The ceramic sealing layer 14 and the ceramic insulating layer 13 seal the carbon layer 11, so that the carbon layer 11 is kept isolated from air, the carbon layer 11 is prevented from being oxidized, and the service life of the tubular carbon heater 1 is prolonged. Preferably, the ceramic sealing layer 14 is located between the carbon layer 11 and the insulating and heat conducting layer 3.

Further, the ring fin radiator 2 is constituted by round tube portions 22 and boss portions 21; the boss 21 is composed of at least two protrusions, and the protrusions are located on the outer wall of the round tube part 22 and are radially arranged, so that the heat dissipation area is increased; the round pipe portion 22 is coaxial with the tubular carbon heater 1, and transfers heat generated from the carbon layer 11 to the annular fin radiator 2 at the same speed and the same efficiency. The circular tube part 22 is a circular tube; the protruding portion 21 has a ring-fin shape, i.e., a ring fin of the ring fin heat sink 2. The outer diameter of the annular fin radiator 2 is circumferentially provided with a fin structure formed by protrusions, and the more the number of fins is, the larger the heat convection area is, namely, the larger the heat dissipation capacity is. The superior heat dissipation characteristic of the annular fin radiator 2 can efficiently lead out the heat generated by the tubular carbon heater 1, avoid the local overheating damage of the tubular carbon heater 1 caused by the heat storage effect, and simultaneously can also improve the electrothermal efficiency and achieve the purpose of energy conservation.

Furthermore, the insulating and heat conducting layer 3 is formed by filling insulating and heat conducting filling materials, and blocking portions for blocking the filling materials from falling off are arranged on end faces of two ends of the insulating and heat conducting layer. The blocking part is composed of an annular insulating space ring 5 and an annular gasket 4, and the annular gasket 4 is sleeved on the outer wall of the annular insulating space ring 5; the outer wall of the annular insulating space ring 5 is also provided with an annular boss 51 matched with the annular gasket 4, so that the positions of the annular insulating space ring 5 and the annular gasket 4 can be kept relatively consistent, a stable blocking part is formed, and the assembling, filling and molding are facilitated. The annular gasket 4 is made of a material with high rigidity, and combined with the annular insulating space ring 5 to prevent the filling material from falling off. The annular insulating spacer 5 further ensures that no electrical conduction occurs between the carbon layer 11 and the annular fin radiator 2. The ceramic sealing layer 14 is located between the insulating and heat conducting layer 3 and the carbon layer 11, and can also prevent the carbon layer 11 from being damaged due to the filler material rubbing the carbon layer 11.

Further, the carbon layer 11 is made of a graphene material mixed with an auxiliary carbon material formed by mixing a carbon nanotube mixture material or a carbon nanotube material, a conductive carbon black mixture material or a conductive carbon black material.

Further, the filling material is one or more of quartz sand, aluminum oxide and magnesium oxide; the ring fin radiator 2 is made of an aluminum material; the annular insulating space ring 5 is made of ceramic or asbestos material; the ceramic sealing layer 14 and the ceramic insulating layer 13 are both made of an aluminum oxide nano ceramic material.

The filling material should have good insulating property, electrical strength, thermal conductivity, high heat resistance, capability of withstanding sudden temperature changes, low hygroscopicity and high mechanical properties. In addition, the expansion coefficient of the filling material is similar to that of the tubular carbon heater 1, the filling material has chemical inertness to the material of the tubular carbon heater 1, and the material has wide sources and low price. Preferably, the filler material is magnesium oxide. Magnesium oxide has a thermal conductivity more than 2 times higher than that of aluminum oxide, and has high refractory and insulating properties. The magnesium oxide can be converted into crystal by burning at a high temperature of more than 1000 ℃. The magnesium oxide is odorless, tasteless and nontoxic, and has a density of 3.58g/cm 3. The high-purity magnesium oxide has excellent alkali resistance and electrical insulation at high temperature, the thermal expansion coefficient of the high-purity magnesium oxide is similar to that of the aluminum oxide nano ceramic material and the carbon layer, and the thermal conductivity of the high-purity magnesium oxide is high.

The annular fin radiator 2 is made of aluminum material, the density of the aluminum material is small, and the density is close to 2.7g/cm³The mechanical strength is high, the strength of the matrix can be further strengthened through certain cold processing, the thermal conductivity is good and is second to silver and copper.

The nano aluminum oxide ceramic has uniform stress distribution, high resistivity and good insulating property.

Example 2

An application of a ring-shaped multi-fin carbon heating device is applied to a hot air table, a hot air gun, an electric hair drier and a warmer; and a fan is arranged beside the annular multi-fin carbon heating device, and the fan is coaxial with the annular multi-fin carbon heating device.

When the annular multi-fin carbon heating device in embodiment 1 is applied to a hot air table and a hot air gun, because the heating area of the tubular carbon heater 1 is large, the annular fin radiator 2 has a very large heat transfer area to fully transfer heat generated by the tubular carbon heater 1, and the air outlet temperature of the hot air table and the hot air gun is stable and uniform by matching with a proper fan rotating speed, so that the following problems of the existing hot air table and the existing hot air gun which adopt resistance wires to generate heat are solved: when the air quantity is too large, the air outlet temperature is low, and the problems of component cold joint, component blow-off, inaccurate positioning and the like are easily caused; when the air quantity is too small, the air outlet temperature is too high, and the problem of burning out elements and circuit boards is easily caused. When being applied to hairdryer, room heater, adjustable to comfortable temperature and amount of wind promote the comfort that the user used.

To sum up, the utility model provides a pair of many wings of annular carbon send hot device and application thereof, during the application, because tubular carbon send the hot area big, annular wing radiator has the produced heat of very big heat transfer area with tubular carbon send the hot device and fully conduct, makes the air-out temperature of sending hot device stable, even, has overcome the following problem that current hot-blast platform, the hot-blast rifle that adopts the resistance wire to generate heat exist: when the air quantity is too large, the air outlet temperature is low, and the problems of component cold joint, component blow-off, inaccurate positioning and the like are easily caused; when the air quantity is too small, the air outlet temperature is too high, so that the problem of burning out elements and circuit boards is easily caused; the use comfort of the electric hair drier, the warmer and the like is improved.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the same principle as the present invention.

Claims (10)

1. The annular multi-fin carbon heating device is characterized by comprising a tubular carbon heater, an annular fin radiator and an insulating heat conduction layer, wherein the annular fin radiator is sleeved on the outer wall of the tubular carbon heater, and the insulating heat conduction layer is positioned between the annular fin radiator and the tubular carbon heater; and a carbon layer containing graphene materials is arranged on the tubular carbon heater.

2. The annular multi-fin carbon thermal device according to claim 1, wherein a support tube is further provided on the tubular carbon thermal device, and the carbon layer is uniformly attached to the side wall of the support tube.

3. The annular multi-fin carbon thermal device according to claim 2, wherein the tubular carbon thermal device is further provided with a ceramic insulating layer, the support tube is a stainless steel tube, and the ceramic insulating layer is located between the stainless steel tube and the carbon layer.

4. The ring-shaped multi-fin carbon thermal device according to claim 3, wherein a ceramic sealing layer is further disposed on the tubular carbon thermal device, the carbon layer is located between the ceramic insulating layer and the ceramic sealing layer, and the edge of the ceramic insulating layer is connected with the edge of the ceramic sealing layer in a sealing manner.

5. The annular multi-fin carbon thermal device according to claim 4, wherein the annular fin heat sink is constituted by a round tube portion and a convex portion; the convex part is composed of at least two bulges, and the bulges are positioned on the outer wall of the round pipe part and are radially arranged; the round pipe part is coaxial with the tubular carbon heater.

6. The annular multi-fin carbon thermal device according to claim 5, wherein the insulating and heat conducting layer is filled with an insulating and heat conducting filling material, and blocking portions for blocking the filling material from falling off are provided on both end faces of the insulating and heat conducting layer.

7. The annular multi-fin carbonaceous thermic device of claim 6, wherein said barrier is comprised of an annular insulating spacer and an annular gasket, said annular gasket being disposed about an outer wall of said annular insulating spacer; and the outer wall of the annular insulating space ring is also provided with an annular boss matched with the annular gasket.

8. The annular multi-fin carbon pyrogenic device according to claim 7, wherein said filler material is one or more of quartz sand, alumina, and magnesium oxide; the ring fin radiator is made of aluminum material; the annular insulating space ring is made of ceramic or asbestos materials; the ceramic sealing layer and the ceramic insulating layer are both made of aluminum oxide nano ceramic materials.

9. The annular multi-fin carbon thermic device of claim 1, wherein said carbon layer is formed from a graphene material mixed with an auxiliary carbon material formed from a carbon nanotube mixture material or a carbon nanotube material, a conductive carbon black mixture material or a conductive carbon black material mixed.

10. An electrical appliance comprising the annular multi-fin carbon thermal device of any one of claims 1 to 9, a fan disposed adjacent the annular multi-fin carbon thermal device, the fan being coaxial with the annular multi-fin carbon thermal device; the electric appliance comprises a hot air table, a hot air gun, an electric hair drier and a warmer.

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