Heating device and cooking equipment with same

Abstract

The utility model discloses a heating device and cooking equipment with the heating device, and the heating device comprises a housing, one side of which is provided with a mounting port; the heat conduction piece is in a plate shape, the heat conduction piece is arranged on the shell and covers the installation opening to define an installation cavity, a radiation layer is arranged on the surface, at least deviating from the installation cavity, of the heat conduction piece, and the radiation layer is constructed to conduct heat in a heat radiation mode; the heating element is arranged in the mounting cavity; and the filling layer is heat-conducting insulating powder and is filled in the mounting cavity. According to the heating device provided by the utility model, the heat-conducting insulating powder is used for conducting heat, so that the contact area between the heating element and the heat-conducting structure (filling layer) is increased, and the heating efficiency of the heating device is improved.

Description

Technical Field

[0001] The utility model relates to the field of household appliances, in particular to a heating device and a cooking device having the same. Background Art

[0002] Currently, some cooking devices on the market may have heating functions such as microwave, grill and / or steam, etc., which can meet different heating needs of users.

[0003] In the related art, the heater used for the grilling function of some cooking equipment is constructed as a flat iron plate heater, which includes: a cover plate arranged toward the cooking cavity, a layer of mica sheet arranged on the side of the cover plate away from the cooking cavity, and an electric heating wire arranged on the side of the mica sheet away from the cover plate. The electric heating wire generates heat and transfers the heat to the cover plate through the mica sheet. The heat of the cover plate heats the food by radiation and convection. The heating temperature of the heater in this way is generally 300-400 degrees Celsius, and the heat transfer method is slow and inefficient. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a heating device that uses heat-conducting insulating powder for heat conduction, increases the contact area between the heating element and the heat-conducting structure (filling layer), and improves the heating efficiency of the heating device.

[0005] The utility model also provides a cooking device comprising the heating device.

[0006] According to an embodiment of the utility model, the heating device includes: an outer shell, a mounting opening is provided on one side of the outer shell; a heat-conducting member, the heat-conducting member is formed in a plate shape, the heat-conducting member is arranged on the outer shell to cover the mounting opening to define a mounting cavity, at least a surface of the heat-conducting member facing away from the mounting cavity is provided with a radiation layer, and the radiation layer is configured to conduct heat in the form of thermal radiation; a heating member, the heating member is arranged in the mounting cavity; and a filling layer, the filling layer is a heat-conducting insulating powder and is filled in the mounting cavity.

[0007] According to the heating device of the embodiment of the utility model, heat is conducted by using heat-conducting insulating powder, thereby increasing the contact area between the heating element and the heat-conducting structure (filling layer), improving the heat-conducting efficiency of the heat-conducting structure (filling layer), and thus improving the heating efficiency of the heating device; the heat of the heat-conducting element is also dissipated in the form of thermal radiation through the radiation layer to heat the food, thereby further improving the heating efficiency of the heating element.

[0008] In some embodiments, the radiation layer is formed as an oxide layer.

[0009] In some embodiments, the heat conducting member is formed of a stainless steel material, and the radiation layer includes a ferroferric oxide layer formed by oxidation on the surface of the heat conducting member.

[0010] In some embodiments, at least a portion of the housing is provided with an insulating layer.

[0011] In some embodiments, the thermal insulation layer is provided on a side of the heat-generating element facing away from the heat-conducting element.

[0012] In some embodiments, a fixing portion is provided in the housing, and the heating element is fixed to the fixing portion.

[0013] In some embodiments, the fixing portion is provided with a fixing hole, and the heating element is passed through and fixed in the fixing hole.

[0014] In some embodiments, the heating element is an electric heating wire, the heating element is provided with a plurality of bending portions, and the fixing portions are multiple and are arranged at intervals on the housing.

[0015] In some embodiments, the filling layer wraps the heat generating element.

[0016] In some embodiments, the filling layer is sintered to fixedly connect the thermal conductor and the housing.

[0017] The cooking device according to the embodiment of the utility model includes: an inner pot, which defines or participates in defining a cooking cavity; a heating device, which is the heating device described in the above technical solution, and the radiation layer is arranged toward the cooking cavity.

[0018] In some embodiments, the heat conductive member defines at least one surface of the cooking cavity.

[0019] In some embodiments, the heat conducting member is formed as a top wall of the cooking cavity.

[0020] In some embodiments, there are multiple heating devices distributed on different sides of the cooking cavity.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a schematic diagram of a heating device according to an embodiment of the utility model;

[0024] Figure 2 is an exploded view of a heating device according to an embodiment of the utility model;

[0025] Figure 3 yes Figure 2 A magnified view of part A;

[0026] Figure 4 Schematic diagram of a cooking device according to an embodiment of the present invention Figure 1 ;

[0027] Figure 5 Schematic diagram of a cooking device according to an embodiment of the present invention Figure 2 .

[0028] Figure numerals: 100, cooking equipment; 1, inner pot; 11, cooking cavity; 200, heating device; 2, outer shell; 21, installation cavity; 22, fixing part; 221, fixing hole; 23, through hole; 3, heat conducting part; 31, radiation layer; 4, heating part; 5, filling layer. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Reference below Figure 1-Figure 5 A heating device 200 according to an embodiment of the present invention is described.

[0033] Reference Figure 1 , Figure 2 and Figure 3 According to the heating device 200 of the embodiment of the utility model, it includes: a shell 2, a heat-conducting member 3 and a heating member 4. A mounting opening is provided on one side of the shell 2. The heat-conducting member 3 is formed as a plate-like structure, and the heat-conducting member 3 is arranged on the shell 2 to cover the mounting opening. A mounting cavity 21 is defined between the shell 2 and the heat-conducting member 3, and the heating member 4 is arranged in the mounting cavity 21.

[0034] The heating device 200 according to the embodiment of the utility model further includes a filling layer 5, which is a heat-conducting insulating powder and is filled in the installation cavity 21. The filling layer 5 is arranged in the installation cavity 21 to separate the heating element 4 from the heat-conducting element 3, avoid electrical connection between the heating element 4 and the heat-conducting element 3, and reduce the risk of short circuit of the heating device 200. And because the filling layer 5 is heat-conducting, the filling layer 5 is also a heat-conducting structure between the heating element 4 and the heat-conducting element 3. When the heating device 200 is working, the heating element 4 generates heat, and the filling layer 5 conducts the heat of the heating element 4 to the heat-conducting element 3, and then dissipates the heat through the heat-conducting element 3 to heat the food.

[0035] Because the filling layer 5 is constructed as a powder structure, the filling layer 5 can fill the installation cavity 21 more tightly, that is, the filling layer 5 at least wraps a portion of the heating element 4, increasing the contact area between the heating element 4 and the filling layer 5. For example, in some embodiments, the heating element 4 is in contact with the housing 2, and in this embodiment, the filling layer 5 wraps the portion of the heating element 4 other than the portion in contact with the housing 2. In other embodiments, the heating element 4 is spaced apart from the housing 2, and in this embodiment, the filling layer 5 completely wraps the heating element 4.

[0036] Compared with the technical solution in the related art that the flat iron plate heater only conducts heat through mica sheets, the utility model uses thermally conductive insulating powder to conduct heat, which increases the contact area between the heating element 4 and the filling layer 5, improves the thermal conductivity of the filling layer 5, and thus improves the heating efficiency of the heating device 200.

[0037] In the heating device 200 of the embodiment of the utility model, at least the surface of the heat-conducting member 3 facing away from the installation cavity 21 is provided with a radiation layer 31, and the radiation layer 31 is configured to conduct heat in the form of thermal radiation. When the heating device 200 is working, the heating element 4 generates heat, the filling layer 5 conducts the heat of the heating element 4 to the heat-conducting member 3, and then the radiation layer 31 dissipates the heat of the heat-conducting member 3 in the form of thermal radiation to heat the food, which effectively improves the heating efficiency of the heating device 200.

[0038] According to the heating device 200 of the embodiment of the utility model, heat is conducted by using heat-conducting insulating powder, thereby increasing the contact area between the heating element 4 and the filling layer 5, improving the thermal conductivity of the filling layer 5, and thus improving the heating efficiency of the heating device 200; the heat of the heat-conducting element 3 is also dissipated in the form of thermal radiation through the radiation layer 31 to heat the food, thereby further improving the heating efficiency of the heating element.

[0039] In some embodiments, the filling layer 5 is sintered to securely connect the heat conducting member 3 and the housing 2 .

[0040] Because the filling layer 5 is a powder structure, after the heating device 200 is heated as a whole at a high temperature, the filling layer 5 will be sintered due to the high temperature, and the sintered filling layer 5 will be bonded to the heat conductor 3 and the outer shell 2 respectively, thereby fixing the heat conductor 3 and the outer shell 2.

[0041] In the embodiment of the utility model, the connection between the heat conducting member 3 and the housing 2 can be achieved without using other connection structures, thereby reducing the cost of the heating device 200. Of course, in other embodiments, the heat conducting member 3 and the housing 2 can also be fixed by fasteners such as screws and bolts, or connected by means of snap connection, interference fit, etc., and the utility model is not limited to this.

[0042] In some embodiments, the filling layer 5 is magnesium oxide powder. In other embodiments, the filling layer 5 may also be aluminum oxide powder. Of course, the filling layer 5 may also be powder of other materials as long as it can conduct heat and insulate.

[0043] Reference Figure 1 , Figure 2 and Figure 3 In some embodiments, a portion of the heat conductor 3 is recessed in a direction away from the housing 2, so that the filling layer 5 can fill the recessed portion of the heat conductor 3, thereby increasing the contact area between the filling layer 5 and the heat conductor 3 and increasing the connection strength between the filling layer 5 and the heat conductor 3.

[0044] In some embodiments, the radiation layer 31 is formed as an oxide layer, that is, the radiation layer 31 is generated by oxidation of the surface of the heat conductor 3 rather than being connected to the heat conductor 3 by an adhesive, which effectively ensures the stability of the radiation layer 31 relative to the heat conductor 3.

[0045] Compared with the technical solution in which the radiation layer 31 is adhered to the heat conductor 3 by an adhesive, in the embodiment of the utility model, there is no need to worry about the problem of adhesive failure caused by high temperature, so that the temperature of the heating device 200 in the embodiment of the utility model can reach 600-1000 degrees Celsius, greatly improving the heating efficiency.

[0046] In some specific embodiments, the heat conducting member 3 is formed as an iron structure, and the radiation layer 31 includes a ferroferric oxide layer formed by oxidation on the surface of the heat conducting member 3 .

[0047] Because the ferroferric oxide layer has the characteristics of high temperature resistance and high infrared emissivity, the radiation layer 31 can dissipate more heat in the form of thermal radiation, further improving the heating efficiency.

[0048] The ferroferric oxide layer is a product of oxidation of the iron structure, and is easy to shape. The ferroferric oxide layer can be formed on the surface of the iron structure by simply subjecting the iron structure to boiler hydrogenation treatment. The radiation layer 31 in the embodiment of the utility model is easy to shape, which reduces the cost of the heating device 200.

[0049] In some specific embodiments, the heat conducting member 3 is made of stainless steel, which is corrosion-resistant and prolongs the service life of the heating device 200 .

[0050] In some embodiments, at least a portion of the housing 2 is provided with a heat-insulating layer to reduce the heat generated by the heating element 4 from being dissipated through the housing 2, thereby improving the utilization rate of thermal energy and reducing energy loss.

[0051] In some further embodiments, a heat-insulating layer is provided on the side of the heat-generating element 4 facing away from the heat-conducting element 3 .

[0052] Through the above technical solution, the heat generated by the heating element 4 can be reduced from being conducted toward the side away from the heat conducting element 3, thereby improving the utilization rate of thermal energy and reducing energy loss.

[0053] In some specific embodiments, the outer shell 2 is constructed as a piece of heat-insulating material.

[0054] Through the above technical solution, the entire shell 2 can be used for heat insulation, that is, the heat generated by the heating element 4 is mainly conducted toward the heat conducting element 3, further improving the utilization rate of thermal energy and reducing energy loss.

[0055] Reference Figure 1 , Figure 2 and Figure 3 In some embodiments, a fixing portion 22 is provided in the housing 2 , and the heating element 4 is fixed to the fixing portion 22 , thereby ensuring the stability of the heating element 4 .

[0056] Reference Figure 1 , Figure 2 and Figure 3 In some specific embodiments, the fixing portion 22 is provided with a fixing hole 221 , and the heating element 4 is passed through and fixed in the fixing hole 221 .

[0057] In the above technical solution, the structure of the fixing portion 22 is simple, which reduces the cost of the fixing portion 22. The heating element 4 can be fixed by passing through the fixing hole 221, which reduces the difficulty of installing the heating element 4 and improves the assembly efficiency of the heating device 200. Of course, in other embodiments, the fixing portion 22 can also be other structures such as a bracket and a buckle, as long as the heating element 4 can be fixed to the inner side of the housing 2, and the utility model is not limited to this.

[0058] Reference Figure 1 , Figure 2 and Figure 3 In some specific embodiments, the heating element 4 is an electric heating wire, which is provided with a plurality of bending portions, and a plurality of fixing portions 22 are provided at intervals on the housing 2. When the electric heating wire is fixed in the housing 2, the electric heating wire is first passed through the fixing holes 221 on the fixing portions 22, then bent once, and then passed through the fixing holes 221 on the fixing portions 22, and then bent once again, and the above operation is repeated to complete the arrangement of the electric heating wire.

[0059] Through the above technical solution, the arrangement and fixation of the electric heating wires can be achieved, avoiding the situation where the electric heating wires are disturbed when the thermally conductive insulating powder is filled in the installation cavity 21, thereby ensuring the uniformity of the arrangement of the electric heating wires.

[0060] Reference Figure 1 , Figure 2 and Figure 3 In some embodiments, multiple fixing portions 22 are arranged in a matrix shape so that the arrangement of the electric heating wires can be more uniform, so that the overall heating of the heat conductor 3 is more uniform, and thus the heating in the cooking cavity 11 of the cooking equipment is more uniform, thereby improving the heating effect of the heating device 200.

[0061] Reference Figure 1 , Figure 2 and Figure 3 In some embodiments, the housing 2 is further provided with a through hole 23 communicating with the mounting cavity 21, and at least a portion of the heating element 4 passes through the through hole 23 for connection with an external power source. It should be noted that the power source may be an external alternating current, or a battery provided in the cooking device 100, or other situations are also possible, as long as the heating element 4 can be provided with current.

[0062] In some specific embodiments, two through holes 23 are provided on one side of the shell 2 away from the heat conducting element 3, and the heating element 4 is constructed as an electric heating wire, and both ends of the electric heating wire extend to the outside of the shell 2 through the two through holes 23 for connecting to a power source.

[0063] The following is the attached Figure 1-5 A specific embodiment of the utility model is described.

[0064] According to the heating device 200 of the embodiment of the utility model, it includes: an outer shell 2, a heat conductive component 3, a heating component 4 and a filling layer 5. A mounting opening is provided on one side of the outer shell 2. The heat conductive component 3 is formed as a plate-like structure, and the heat conductive component 3 is arranged on the outer shell 2 to cover the mounting opening. An mounting cavity 21 is defined between the outer shell 2 and the heat conductive component 3, and the heating component 4 is arranged in the mounting cavity 21.

[0065] The filling layer 5 is a heat-conducting insulating powder and is filled in the mounting cavity 21. The filling layer 5 is disposed in the mounting cavity 21 to separate the heat-generating element 4 from the heat-conducting element 3. The filling layer 5 is magnesium oxide powder.

[0066] A portion of the heat conductor 3 is recessed in a direction away from the housing 2 , and a portion of the filling layer 5 is filled in the recessed portion of the heat conductor 3 .

[0067] At least the surface of the heat conducting element 3 facing away from the installation cavity 21 is provided with a radiation layer 31 , and the radiation layer 31 is configured to conduct heat in the form of thermal radiation.

[0068] The heat conducting member 3 is formed of a stainless steel material, and the radiation layer 31 includes a ferroferric oxide layer formed by oxidation on the surface of the heat conducting member 3 .

[0069] The outer shell 2 is constructed as a piece of heat-insulating material, and a plurality of fixing parts 22 are provided inside the outer shell 2. The plurality of fixing parts 22 are arranged in a matrix shape, and each fixing part 22 is provided with a fixing hole 221. The heating element 4 is an electric heating wire, and the electric heating wire is provided with a plurality of bending parts. The electric heating wire is sequentially passed through the fixing holes 221 of the plurality of fixing parts 22 to be installed inside the outer shell 2.

[0070] Two through holes 23 are provided on one side of the housing 2 away from the heat conducting element 3 . The heating element 4 is constructed as an electric heating wire, and both ends of the electric heating wire extend to the outside of the housing 2 through the two through holes 23 for connecting to a power source.

[0071] The filling layer 5 is sintered to fix the heat conducting member 3 and the housing 2 .

[0072] The assembly steps of the heating device 200 in the embodiment of the utility model are as follows: first, pass the electric heating wire through a row of fixing parts 22, then bend the electric heating wire, and then pass the electric heating wire through a row of fixing parts 22, repeat the above operation, so that the electric heating wire passes through all the fixing parts 22, and then pass the two ends of the electric heating wire through the two through holes 23 respectively to be located on the outside of the shell 2. After completing the installation of the electric heating wire, fill the installation cavity 21 with magnesium oxide powder, and compact the magnesium oxide powder to avoid gaps and pores in the filling layer 5, then cover the installation port of the shell 2 with the heat conductive part 3, and finally perform boiler hydrogenation treatment on the heating device 200 as a whole, so that the magnesium oxide powder in the installation cavity 21 is sintered at a high temperature of not less than 1070 degrees Celsius to fix the heat conductive part 3 to the shell 2, and the boiler hydrogenation treatment also causes the side of the heat conductive part 3 away from the shell 2 to be oxidized to form a layer of ferroferric oxide, thereby completing the assembly of the heating device 200.

[0073] When the heating device 200 in the embodiment of the utility model is working, the heating element 4 generates heat, the filling layer 5 conducts the heat of the heating element 4 to the heat-conducting element 3, and then the radiation layer 31 dissipates the heat of the heat-conducting element 3 in the form of thermal radiation to heat the food, thereby effectively improving the heating efficiency of the heating element.

[0074] Reference Figure 3 , Figure 4 and Figure 5 According to an embodiment of the utility model, the cooking device 100 includes: an inner pot 1 and a heating device 200, the inner pot 1 defines or participates in defining a cooking cavity 11, the heating device 200 is the heating device 200 in the above technical solution, and the radiation layer 31 is arranged toward the cooking cavity 11.

[0075] According to the cooking device 100 of the embodiment of the utility model, the heating device 200 uses heat-conducting insulating powder to conduct heat, which increases the contact area between the heating element 4 and the filling layer 5, improves the thermal conductivity efficiency of the filling layer 5, and improves the heating efficiency of the heating device 200; the heating device 200 also dissipates the heat of the heat-conducting element 3 in the form of thermal radiation through the radiation layer 31 to heat the food, further improving the heating efficiency of the heating element.

[0076] In some embodiments, the inner pot 1 defines a cooking cavity 11 , and the heating device 200 is disposed as a whole in the cooking cavity 11 . The heating device 200 can be disposed on the upper wall, bottom wall, left wall, right wall or rear wall of the cooking cavity 11 .

[0077] Reference Figure 3 , Figure 4 and Figure 5 In other embodiments, the heat conducting member 3 of the heating device 200 defines a surface of the cooking cavity 11, that is, the plate-shaped heat conducting member 3 cooperates with other structures (the inner pot 1 with one side open) to define the cooking cavity 11.

[0078] In this embodiment, the heat conductive member 3 is formed as the side wall of the cooking cavity 11, which reduces the material used for the inner pot 1 and reduces the cost of the cooking device 100. The outer shell 2, the heating element 4 and the filling layer 5 are all arranged on the outside of the cooking cavity 11, which is beneficial to increase the space of the cooking cavity 11, reduce the risk of damage to the heating device 200, and extend the service life of the heating device 200.

[0079] Reference Figure 3 , Figure 4 and Figure 5 In some specific embodiments, the heat conducting member 3 is formed as the top wall of the cooking cavity 11, so that the heat conducting member 3 evenly heats the entire cooking cavity 11, so that the food in the cooking space can be heated from above, thereby improving the grilling effect of the cooking device.

[0080] In some further embodiments, the cooking device further includes a shell, and the shell 2 of the heating device 200 is sandwiched between the shell and the heat-conducting member 3, which further increases the stability of the connection between the shell 2 and the heat-conducting member 3.

[0081] In some embodiments, there are multiple heating devices 200 , which are distributed on different sides of the cooking cavity 11 .

[0082] By heating the food from different directions through multiple heating devices 200, a more three-dimensional grilling effect can be achieved, thereby improving the grilling efficiency of the cooking device 100.

[0083] In some specific embodiments, two heating devices 200 are provided, and the two heating devices 200 are respectively arranged on the upper side and the lower side of the cooking cavity 11. When the cooking device 100 performs the grilling function, the two heating devices 200 work simultaneously to heat the food from the top and the bottom, respectively, thereby ensuring the grilling effect.

[0084] In other embodiments, the number of the heating devices 200 can be five, and the five heating devices 200 are respectively arranged at the upper side, the lower side, the left side, the right side and the rear side of the cooking space. In other embodiments, the number of the heating devices 200 can be three, four or other numbers, and the present invention is not limited to this.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0086] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A heating device, characterized in that: include: A housing, wherein a mounting opening is provided on one side of the housing; A heat conducting member, the heat conducting member is formed in a plate shape, the heat conducting member is arranged on the housing to cover the mounting opening to define a mounting cavity, at least a surface of the heat conducting member facing away from the mounting cavity is provided with a radiation layer, and the radiation layer is configured to conduct heat in the form of thermal radiation; A heating element, wherein the heating element is arranged in the installation cavity; A filling layer is a thermally conductive insulating powder and is filled in the installation cavity.

2. The heating device according to claim 1, characterized in that The radiation layer is formed as an oxide layer.

3. The heating device according to claim 2, characterized in that: The heat conducting member is formed of a stainless steel material, and the radiation layer comprises a ferroferric oxide layer formed by oxidation on the surface of the heat conducting member.

4. The heating device according to claim 1, characterized in that At least part of the shell is provided with a heat-insulating layer.

5. The heating device according to claim 4, characterized in that: The heat-insulating layer is provided on a side of the heat-generating element facing away from the heat-conducting element.

6. The heating device according to claim 1, characterized in that: A fixing portion is provided in the housing, and the heating element is fixed to the fixing portion.

7. The heating device according to claim 6, characterized in that The fixing portion is provided with a fixing hole, and the heating element is passed through and fixed in the fixing hole.

8. The heating device according to claim 7, characterized in that: The heating element is an electric heating wire, and the heating element is provided with a plurality of bending parts. The fixing parts are multiple and are arranged at intervals on the housing.

9. The heating device according to claim 1, characterized in that: The filling layer wraps the heat generating element.

10. The heating device according to any one of claims 1 to 9, characterized in that: The filling layer is sintered to fixedly connect the heat conducting member and the housing.

11. A cooking device, characterized in that: include: An inner pot, wherein the inner pot defines or participates in defining a cooking cavity; A heating device, wherein the heating device is the heating device according to any one of claims 1 to 10, and the radiation layer is arranged toward the cooking cavity.

12. The cooking device according to claim 11, characterized in that The heat conducting member defines at least one surface of the cooking cavity.

13. The cooking device according to claim 12, characterized in that The heat conducting member is formed as a top wall of the cooking cavity.

14. The cooking device according to claim 11, characterized in that The heating devices are multiple and distributed on different sides of the cooking cavity.

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