CN219395070U - Heating pipe and cooking utensil - Google Patents

Abstract

The application relates to the technical field of kitchen appliances and discloses a heating pipe and a cooking utensil. The heating pipe includes: the base pipe comprises a straight pipe and an arc pipe which are communicated; the graphene coating is arranged on the inner wall surface of the straight tube of the base tube, and infrared rays emitted by the graphene coating can be emitted out through the base tube; the conductive heating support is arranged on the arc-shaped tube and is connected with the graphene coating. The utility model discloses a base pipe that straight line pipe and arced tube combined together is adopted to this application, at straight line intraductal wall coating graphene coating, set up at arced tube intraductal wall electrically conductive support with graphene coating connects, makes the base pipe be heated evenly to realize that the heating pipe heats evenly, and simple structure, with low costs.

Description

Heating pipe and cooking utensil

Technical Field

The application relates to the technical field of kitchen appliances, in particular to a heating pipe and a cooking utensil.

Background

At present, most existing cooking appliances, such as ovens, adopt a heating pipe mode of bending metal to heat, the heating surface is extremely large and heated uniformly, but the heating mode has a slow heating speed, the starting-up time is about ten minutes, seven minutes are required for reaching 120 ℃ at maximum, and the food cooking time is long, so that the happiness is reduced.

The related art discloses a heating tube for an oven, including a straight quartz tube. The inner wall of the quartz tube is coated with a graphene coating.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

the graphene coating is adopted in the related art, so that the heating speed in the oven can be increased, the preheating time is shortened, but a linear quartz tube is adopted in the related art, and the heating is uneven.

It should be noted that the information disclosed in the foregoing background section is only for enhancing understanding of the background of the present application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides a heating pipe and a cooking appliance, which are used for solving the problem of uneven heating in the related art.

According to a first aspect of an embodiment of the present utility model, there is provided a heating tube including: the base pipe comprises a straight pipe and an arc pipe which are communicated; the graphene coating is arranged on the inner wall surface of the straight tube, and infrared rays emitted by the graphene coating can be emitted out through the base tube; the conductive heating support is arranged inside the arc-shaped tube and connected with the graphene coating.

Optionally, the conductive heating support is hollow, the outer wall of the conductive heating support is attached to the inner wall of the base pipe, and the end part of the conductive heating support is connected with the graphene coating.

Optionally, the tube wall of the conductive heating support is in a grid shape.

Optionally, a plurality of the straight tubes are arranged in parallel; and each two straight pipes are connected through the arc-shaped pipes to form a U-shaped pipe group, and the open ends of the adjacent straight pipes of the two adjacent U-shaped pipe groups are connected through the arc-shaped pipes to form the base pipe which is in a serpentine shape.

Optionally, the base pipe comprises one or more of a quartz pipe, a microcrystalline pipe, a mica pipe, a glass pipe and a ceramic pipe.

Optionally, the heating tube further comprises: the anode lead is connected with the graphene coating and extends out of one end of the base pipe; the negative electrode lead is connected with the graphene coating and extends out of the other end of the base pipe; the first clamping ring is arranged at one end of the base pipe, the outer wall of the first clamping ring is matched with the inner wall of one end of the base pipe, and the positive electrode lead wire is clamped between the outer wall of the first clamping ring and the inner wall of one end of the base pipe; the second clamping ring is arranged at the other end of the base pipe, the outer wall of the second clamping ring is matched with the inner wall of the base pipe at the other end of the base pipe, and the negative electrode lead wire is arranged between the outer wall of the second clamping ring and the inner wall of the base pipe at the other end of the base pipe.

Optionally, the first clamping ring and the second clamping ring are both insulating mica arc plates.

Optionally, the heating tube further comprises: the first insulation plug is used for plugging one end of the base pipe, and the positive electrode lead passes through the first insulation plug to the outside of the base pipe and is used for being connected with an external electrical element; and the second insulation plug is used for plugging the other end of the base pipe, and the negative electrode lead passes through the second insulation plug to the outside of the base pipe and is used for being connected with the external electrical element.

Optionally, the base pipe is filled with inert gas.

According to a second aspect of embodiments of the present utility model, there is provided a cooking appliance comprising a main body and a heating tube as in any of the above embodiments. Wherein the main body defines a cooking space; a heating tube as in any one of the above embodiments disposed within the cooking space.

The heating pipe and the cooking utensil provided by the embodiment of the disclosure can realize the following technical effects:

the base tube combining the straight tube and the arc tube is adopted, the graphene coating is coated on the inner wall of the straight tube, and the conductive support is arranged on the inner wall of the arc tube and connected with the graphene coating, so that the base tube is heated uniformly, the heating tube is heated uniformly, and the base tube is simple in structure and low in cost.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

FIG. 1 is a schematic view of a heating tube according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of the structure of FIG. 1 taken along the direction B-B;

FIG. 3 is a schematic cross-sectional view of the structure of FIG. 1 taken along the direction C-C;

FIG. 4 is an enlarged schematic view at A in FIG. 1;

FIG. 5 is a schematic cross-sectional view of a U-shaped tube set provided in an embodiment of the present disclosure;

fig. 6 is a schematic structural view of a cooking appliance according to an embodiment of the present disclosure.

Reference numerals:

1: heating pipes; 11: a base pipe; 111: a straight line pipe; 112: an arc tube; 12: a graphene coating; 13: a conductive heating bracket; 14: a U-shaped tube group; 15: a positive electrode lead; 16: a negative electrode lead; 17: a first clamping ring; 18: a second clamping ring; 19: a first insulating plug; 20: a second insulating plug;

2: a cooking appliance; 21: a grill; 22: a tray; 23: a main body; 24: cooking space.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.

In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

The term "plurality" means two or more, unless otherwise indicated.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

Referring to fig. 1-6, embodiments of the present disclosure provide a heating pipe 1 and a cooking appliance 2.

Optionally, as shown in fig. 1, the heating tube 1 includes a base tube 11, a graphene coating 12, and a conductive heat-generating support 13. Wherein the base pipe 11 comprises a straight pipe 111 and an arc pipe 112 which are communicated; a graphene coating layer 12 provided on an inner wall surface of the straight tube 111, wherein infrared rays emitted from the graphene coating layer 12 can be emitted through the base tube 11; the conductive heating support 13 is arranged inside the arc-shaped tube 112, and the conductive heating support 13 is connected with the graphene coating 12.

In the scheme, the heating pipe 1 adopts the base pipe 11 with the combination of the straight pipe 111 and the arc pipe 112, the graphene coating 12 is coated on the inner wall of the straight pipe 111, the graphene coating 12 has strong electric conduction and heat conduction properties, and graphene is coated on the inner surface of the base pipe 11, and the electric limit is switched on, so that rapid heating can be realized; the inner wall of the arc-shaped tube 112 is provided with the conductive heating support 13, the conductive heating support 13 is a plastic conductive metal piece, the conductive heating support 13 is supported from inside to outside in the base tube 11 and then clings to the inner wall of the base tube 11, two ends of the conductive heating support 13 are respectively connected with the graphene coating 12, and the graphene coating 12 heats and then is conducted through the conductive heating support 13, so that the base tube 11 is heated uniformly, and the heating tube 1 is heated uniformly.

Alternatively, the arc tube 112 in this embodiment may be a circular arc, or may be a curved tube with other shapes; the straight line tube 111 in this embodiment may be a non-straight line tube 111. For example, in this embodiment, the base pipe 11 may be formed by connecting a plurality of curved pipes, where the bending portions are all provided with conductive heating brackets 13, and the inner wall of the port is provided with a graphene coating 12.

Alternatively, the graphene may be uniformly coated on the inner wall of the straight tube 111 by a CVD growth method, an electrostatic spraying method or a pouring method.

Alternatively, as shown in fig. 1 and 5, the conductive heating support 13 is hollow, the outer wall of the conductive heating support 13 is attached to the inner wall of the base pipe 11, and the end of the conductive heating support 13 is connected with the graphene coating 12.

In the scheme, the conductive heating bracket 13 is arranged in a hollow tube shape, so that the weight of the conductive heating bracket 13 can be reduced, materials are saved, and the cost is reduced; meanwhile, the wall thickness of the conductive heating support 13 is reduced, so that the outer wall of the conductive heating support 13 can be better attached to the graphene coating 12, and the conductive heating support 13 can heat uniformly.

It can be understood that the conductive heating support 13 in this embodiment may be solid, where the outer wall of the solid conductive heating support 13 is closely attached to the inner wall of the base pipe 11, so as to ensure that two ends of the outer wall of the conductive heating support 13 are in contact with the graphene coating 12 at the port of the base pipe 11.

Alternatively, as shown in fig. 1 and 5, the tube wall of the conductive heat generating bracket 13 is in a grid shape.

In the scheme, the conductive heating support 13 is set to be in a grid shape, wherein the grid shape is quadrilateral, the grid-shaped conductive heating support 13 can move between a contracted state and an expanded state, the grid-shaped conductive heating support 13 stretches into the arc-shaped tube 112 in the contracted state and expands in the arc-shaped tube 112, so that the outer wall of the conductive heating support 13 is uniformly attached to the inner wall of the base tube 11, the conductive heating support 13 can uniformly transfer heat to the arc-shaped tube 112, the arc-shaped tube 112 can be uniformly heated, and the grid-shaped structure has high heat dissipation speed, so that the conductive heating support 13 can be better attached to the base tube 11; meanwhile, the grid-shaped conductive heating bracket 13 is lighter in weight, so that the load of the base pipe 11 is reduced; moreover, the grid-shaped conductive heating support 13 has good plasticity, is convenient to be sent to the arc-shaped pipe 112 of the base pipe 11 from one port of the base pipe 11, and avoids damaging the graphene coating 12 positioned on the inner wall of the straight pipe 111 in the process of pushing the conductive heating support 13 into the arc-shaped pipe 112.

It will be appreciated that the walls of the conductive heat-generating stent 13 may be other than mesh; for example, the conductive heat generating bracket 13 may be a spiral tube shape composed of heating wires.

Alternatively, as shown in fig. 1 and 5, a plurality of straight tubes 111 are arranged in parallel; wherein each two straight tube pipes 111 are connected by an arc-shaped pipe 112 to form a U-shaped tube group 14, and the open ends of the adjacent straight tube pipes 111 of the adjacent two U-shaped tube groups 14 are connected by an arc-shaped pipe 112 to form a base tube 11 exhibiting a serpentine shape.

In this solution, adjacent straight tubes 111 are connected through an arc tube 112 to form a U-shaped tube set 14, and adjacent U-shaped tube sets 14 are sequentially connected through the arc tube 112 to form a serpentine panel base tube 11 formed by combining a plurality of U-shaped tube sets 14. Wherein, the plurality of straight tubes 111 are arranged in parallel, and the base tube 11 formed by one straight tube 111 and one arc tube 112 can have a larger heating area than the base tube 11 formed by connecting adjacent straight tubes 111 through the arc tube 112; setting the base pipe 11 to be serpentine can make the heated area even, has the same distance between each adjacent straight pipe to guarantee to generate heat evenly.

Alternatively, the plurality of straight tubes 111 may be disposed in a non-parallel manner, for example, an angle is formed between adjacent straight tubes 111, and the angle is set to be an acute angle; wherein the included angle between each adjacent straight line tube 111 may be different.

Optionally, as shown in fig. 1, the base pipe 11 includes one or more of a quartz pipe, a microcrystalline pipe, a mica pipe, a glass pipe, and a ceramic pipe.

In the scheme, the base pipe 11 is made of one or more materials of a quartz tube, a microcrystalline tube, a mica tube, a glass tube and a ceramic tube, and the base pipe 11 made of the materials is infrared-transparent, insulating and high-temperature-resistant, can prevent electric leakage, and infrared rays can penetrate the base pipe 11 to dissipate heat; the high temperature resistant base pipe 11 can achieve higher temperature heating, increasing the heating temperature range.

In the scheme, the base pipe 11 is preferably made of a quartz tube, is processed by a precise compression molding process, has low cost and high softening temperature, and can bear heating at a higher temperature; the quartz tube has low thermal expansion coefficient and high mechanical strength, can ensure good contact between the graphene coating 12 positioned in the base tube 11 and the grid-shaped conductive heating support 13, and can not cause poor contact between the graphene coating 12 and the conductive heating support 13 due to heating expansion of the base tube 11 so as to ensure heating performance; and the quartz tube has good chemical stability, is not easy to damage due to corrosion so as to leak electricity, and has good safety.

Optionally, as shown in fig. 1 to 4, the heating tube 1 further includes a positive electrode lead 15, a negative electrode lead 16, a first clamping ring 17, and a second clamping ring 18. Wherein the anode lead 15 is connected with the graphene coating 12 and extends out from one end of the base pipe 11; a negative electrode lead 16 connected to the graphene coating layer 12 and extending from the other end of the base pipe 11; the first clamping ring 17 is arranged at one end of the base pipe 11, the outer wall of the first clamping ring 17 is matched with the inner wall of one end of the base pipe 11, and the positive electrode lead 15 is clamped between the outer wall of the first clamping ring 17 and the inner wall of one end of the base pipe 11; the second clamping ring 18 is arranged at the other end of the base pipe 11, the outer wall of the second clamping ring 18 is matched with the inner wall of the base pipe 11 at the other end, and the cathode lead 16 is clamped between the outer wall of the second clamping ring 18 and the inner wall of the base pipe 11 at the other end.

In the scheme, a positive electrode lead 15 is connected with a graphene coating 12 in a base pipe 11 and extends out from one end of the base pipe 11 and is used for being connected with an external power supply so as to electrify the graphene coating 12 with positive electrode electricity; the negative electrode lead 16 is connected with the graphene coating 12 in the base pipe 11 and extends out of the other end of the base pipe 11 to be connected with an external power supply, so that the negative electrode of the graphene coating 12 is electrified, the circuit integrity of the base pipe 11 is ensured, and heating is realized; the positive electrode lead 15 is in contact with the graphene coating 12 and is fixed through a first clamping ring 17, and the first clamping ring 17 is an elastic ring and has good rigidity; the outer wall of the first clamping ring 17 is tightly matched with the inner wall of the base pipe 11, and the positive electrode lead 15 is clamped between the first clamping ring 17 and the inner wall of the base pipe 11, so that the positive electrode lead 15 can be well contacted with the graphene coating 12; the negative electrode lead 16 contacts with the graphene coating 12, the second clamping ring 18 is fixed, the second clamping ring 18 has good rigidity, the second clamping ring 18 is tightly matched with the base pipe 11, the negative electrode lead 16 is clamped between the second clamping ring 18 and the inner wall of the base pipe 11, and the negative electrode lead 16 can be well contacted with the graphene coating 12, so that the base pipe 11 is ensured to have good circuit contact, and the heating pipe 1 can normally generate heat.

Alternatively, as shown in fig. 1 to 4, the first clamping ring 17 and the second clamping ring 18 are both insulating mica arc plates.

In this scheme, the first clamp ring 17 and the second clamp ring 18 are made of insulating mica arc plates, and the first clamp ring 17 and the second clamp ring 18 are both disposed at the end of the base pipe 11, so that the base pipe 11 exposed at the outer side can be both made of insulating members to prevent leakage.

Optionally, the first clamping ring 17 and the second clamping ring 18 may be insulating arc plates made of other materials, where the first clamping ring 17 and the second clamping ring 18 have elasticity, so as to ensure that the first clamping ring 17 can clamp and fix the positive electrode wire, and the second clamping ring 18 can fasten the negative electrode wire clamp.

Optionally, as shown in fig. 1 and 4, the heating tube 1 further includes: a first insulation plug 19 for plugging one end of the base pipe 11, and a positive electrode lead 15 passes through the first insulation plug 19 to the outside of the base pipe 11 for connection with an external electrical component; the second insulating plug 20 plugs the other end of the base pipe 11, and the negative electrode lead 16 passes through the second insulating plug 20 to the outside of the base pipe 11 for connection with external electrical components.

In the scheme, in order to further prevent electric leakage, a first insulation plug 19 is arranged at the positive electrode port of the heating pipe 1, one end of a positive electrode wire is sealed inside the base pipe 11 by the first insulation plug 19, meanwhile, the other end of the positive electrode wire passes through the first insulation plug 19 and extends out of the base pipe 11 to be connected with an external circuit, and an insulation sheath wraps the outer surface of the positive electrode wire exposed to the outer side to prevent electric leakage; the second insulation plug 20 is arranged at the negative electrode port of the heating pipe 1, one end of a negative electrode wire is sealed inside the base pipe 11 by the second insulation plug 20, meanwhile, the other end of the negative electrode wire penetrates through the second insulation plug 20 to extend out of the base pipe 11 to be connected with an external circuit, and an insulation sheath is wrapped on the outer surface of the positive electrode wire exposed to the outer side to avoid electric leakage. The first insulating plug 19 and the second insulating plug 20 each comprise a plugging portion and an end cover, the plugging portion is cylindrical, the plugging portion is plugged into the base pipe 11, and the outer wall of the plugging portion is tightly attached to the inner wall of the base pipe 11 so as to plug the base pipe 11; one end of the plugging part is connected with the end cover into a whole, and the connecting surface of the end cover and the plugging part is propped against one end of the base pipe 11.

Optionally, the first insulating plug 19 is made of plastic or other elastic material. Therefore, the base pipe 11 is sealed by the plug, and external liquid can be prevented from entering the base pipe 11 to corrode the inner parts of the base pipe 11.

Optionally, as shown in fig. 1, the base pipe 11 is filled with an inert gas.

In the scheme, two ends of the base pipe 11 are plugged by plugs, inert gas is filled in the base pipe 11, and corrosion of components in the base pipe 11 can be prevented to influence the heating performance of the heating pipe.

Alternatively, the inert gas may be argon, neon or helium.

Optionally, a vacuum may be applied to the interior of the base pipe 11 to prevent corrosion of the components within the base pipe 11.

Alternatively, as shown in fig. 1, 6, according to an embodiment of the second aspect of the present application, there is provided a cooking appliance 2 comprising a main body 23 and a heating tube 1 as in any of the above embodiments. Wherein the main body 23 defines a cooking space 24; the heating tube 1 according to any of the above embodiments is provided in a cooking space 24.

The cooking appliance 2 provided in the embodiment of the second aspect of the present application, because of including the heating tube 1 in any one of the above embodiments, has all the advantages of the heating tube 1 in any one of the above embodiments, and is not described herein again.

Optionally, the heating tube 1 is provided at the top wall of the cooking space 24.

Optionally, the installation process of the conductive heat generating bracket 13 includes the steps of:

s1: sleeving the conductive heating support 13 on a catheter to enable the grid-shaped conductive heating support 13 to be in a contracted shape, wherein the contact part of the catheter and the conductive heating support 13 is an elastic air bag;

s2: pushing the conductive heating bracket 13 to the arc-shaped pipe 112 by using a catheter;

s4: filling gas into the elastic air bag through the guide pipe to enable the elastic air bag to be inflated, so that the conductive heating bracket 13 is expanded to be closely attached to the inner wall of the base pipe 11;

s5: releasing the gas in the elastic air bag to enable the elastic air bag to contract;

s6: the catheter is withdrawn.

Optionally, the cooking appliance 2 further comprises a fixing bracket for fixing the heating tube 1 to an inner top wall of the cooking appliance 2.

Optionally, the mount includes a retaining ring and fins. Wherein, solid fixed ring and fin are as an organic whole, and the fin sets up in solid fixed ring both sides. The wall of the base pipe 11 is arranged in the fixing ring, the fins on two sides of the fixing ring are provided with mounting holes, the top wall of the cooking utensil 2 is provided with threaded holes, and the mounting holes of the fins correspond to the threaded holes and are fixed through bolts.

Optionally, the top wall of the interior of the cooking appliance 2 is provided with a fixing groove, and the heating tube 1 can be further embedded into the positioning groove to be fixed to the cooking appliance 2. Wherein, the opposite side of fixed recess is equipped with decurrent location arch, and the location is protruding inwards to slope, and in the fixed recess was pressed into to heating pipe 1 in, the protruding inner wall in location and the butt of heating pipe 1 to prevent heating pipe 1 to drop and break away from fixed recess.

Optionally, the end of the positioning protrusion is provided with an inwardly bent barb, and the top end of the barb is abutted with the heating pipe 1 so as to fix the position of the heating pipe 1.

Alternatively, as shown in fig. 6, the cooking appliance 2 may be an oven, in which a detachable tray 22 and a grill 21 are provided, wherein the tray 22 and the grill 21 may be placed at desired positions, for example, the tray 22 may be provided on the grill 21; or it may be desirable to place the grill 21 over the tray 22 so that heat passes through the grill 21 to heat the food product on the tray 22.

Optionally, as shown in fig. 6, a plurality of mounting positions of the tray 22 and the grill 21 are arranged in the cooking appliance 2, and the distance between the tray 22 or the grill 21 and the top heating pipe can be adjusted, so that different foods can be placed on the tray or the grill at different positions according to the required baking time and temperature of each food, and multiple foods can be simultaneously manufactured.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others.

Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed.

Furthermore, when used in this application, the terms "comprises," "comprising," and/or "includes," and variations thereof, mean that the stated features, integers, steps, operations, elements, and/or components are present, but that the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements.

In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.

The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A heating tube, comprising:

a base pipe (11) comprising a straight pipe (111) and an arc pipe (112) which are communicated;

a graphene coating layer (12) provided on the inner wall surface of the straight tube (111), wherein infrared rays emitted by the graphene coating layer (12) can be emitted through the base tube (11);

the conductive heating support (13) is arranged inside the arc-shaped tube (112), and the conductive heating support (13) is connected with the graphene coating (12).

2. A heating pipe as claimed in claim 1, characterized in that,

the conductive heating support (13) is hollow and tubular, the outer wall of the conductive heating support (13) is attached to the inner wall of the base pipe (11), and the end part of the conductive heating support (13) is connected with the graphene coating (12).

3. A heating pipe as claimed in claim 2, characterized in that,

the pipe wall of the conductive heating bracket (13) is in a grid shape.

4. A heating pipe as claimed in claim 1, characterized in that,

a plurality of the straight pipes (111) are arranged in parallel;

wherein every two straight line pipes (111) are connected through the arc-shaped pipes (112) to form a U-shaped pipe group (14), and the open ends of adjacent straight line pipes (111) of two adjacent U-shaped pipe groups (14) are connected through the arc-shaped pipes (112) to form the base pipe (11) which presents a snake shape.

5. A heating pipe as claimed in claim 1, characterized in that,

the base pipe (11) comprises one or more of a quartz pipe, a microcrystalline pipe, a mica pipe, a glass pipe and a ceramic pipe.

6. The heating tube of any one of claims 1 to 5, further comprising:

the anode lead (15) is connected with the graphene coating (12) and extends out of one end of the base pipe (11);

a negative electrode lead (16) connected with the graphene coating (12) and extending from the other end of the base pipe (11);

the first clamping ring (17) is arranged at one end of the base pipe (11), the outer wall of the first clamping ring (17) is matched with the inner wall of the base pipe (11), and the positive electrode lead (15) is clamped between the outer wall of the first clamping ring (17) and the inner wall of the base pipe (11);

the second clamping ring (18) is arranged at the other end of the base pipe (11), the outer wall of the second clamping ring (18) is matched with the inner wall of the base pipe (11), and the negative electrode lead (16) is clamped between the outer wall of the second clamping ring (18) and the inner wall of the base pipe (11).

7. A heating pipe as claimed in claim 6, characterized in that,

the first clamping ring (17) and the second clamping ring (18) are both insulating mica arc plates.

8. The heating tube of claim 6, further comprising:

a first insulation plug (19) for plugging one end of the base pipe (11), wherein the positive electrode lead (15) passes through the first insulation plug (19) to the outside of the base pipe (11) and is used for being connected with an external electrical element;

and the second insulation plug (20) is used for plugging the other end of the base pipe (11), and the negative electrode lead (16) passes through the second insulation plug (20) to the outside of the base pipe (11) and is used for being connected with an external electrical element.

9. A heating pipe as claimed in any one of claims 1 to 5, characterized in that,

the base pipe (11) is filled with inert gas.

10. A cooking appliance, comprising:

a main body (23) defining a cooking space (24);

the heating tube (1) according to any one of claims 1 to 9 being provided within the cooking space (24).