Electric oven

Abstract

The utility model belongs to the technical field of electric ovens, and particularly discloses an electric oven which is characterized in that mica sheets are good in high temperature resistance but have relative deviation in heat insulation performance, and heat insulation cotton is good in heat insulation performance but has relative deviation in high temperature resistance performance. The mica sheet is arranged on the upper surface of the base, the heat insulation cotton is laid on the lower surface of the mica sheet, the mica sheet and the heat insulation cotton are complementary, first-stage heat insulation is conducted through the mica sheet with good high-temperature resistance and heat insulation performance, second-stage heat insulation is conducted through the heat insulation cotton with good high-temperature resistance and heat insulation performance, and double heat insulation is achieved through the mica sheet and the heat insulation cotton. Therefore, heat radiated downwards is effectively reduced, too high temperature rise below the oven body is avoided, most heat is radiated upwards through the microcrystal glass plate, and the energy utilization rate of the electric oven is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of cooking equipment, in particular to an electric grill. Background Art

[0002] An electric grill mainly comprises a baking tray and a heating device. The heat generated by the working of the heating device is transferred to the baking tray to fry and roast the food in the baking tray. Most of the existing electric grills use an electric heating wire to generate heat by being electrified, but this heating method has defects such as slow heating, high cost, and uneven heating.

[0003] For this reason, the prior art has proposed a graphene electric grill, which includes a baking tray body with a graphene conductive heating coating coated on the surface of the baking tray body. It is found in actual application that there is a problem of excessive temperature rise below the baking tray body, and the heat insulation effect of the conventional heat insulation coating is not good, resulting in low energy utilization rate of the graphene electric grill.

[0004] Therefore, there is an urgent need for an electric grill to solve the above technical problems. Summary of the Utility Model

[0005] The technical problem solved by the utility model is to provide an electric grill, which can effectively solve the problem of excessive temperature rise below the baking tray body of the existing graphene electric grill and improve the energy utilization rate of the graphene electric grill.

[0006] The above technical problem is solved by the following technical solutions:

[0007] An electric grill includes a heating component, a mica sheet, and heat insulation cotton. The heating component includes a microcrystalline glass plate and a graphene heating film laid on the lower surface of the microcrystalline glass plate. The mica sheet is laid on the lower surface of the graphene heating film, and the heat insulation cotton is laid on the lower surface of the mica sheet.

[0008] The electric grill of the utility model has the following beneficial effects compared with the background art:

[0009] Since the mica sheet has good high-temperature resistance but relatively poor heat insulation performance, while the heat insulation cotton has good heat insulation performance but relatively poor high-temperature resistance, this electric grill lays a mica sheet on the lower surface of the graphene heating film and lays heat insulation cotton on the lower surface of the mica sheet, using the mica sheet and the heat insulation cotton for complementarity. First, the mica sheet with better high-temperature resistance than heat insulation performance is used for primary heat insulation, and then the heat insulation cotton with better heat insulation performance than high-temperature resistance is used for secondary heat insulation, realizing double heat insulation through the mica sheet and the heat insulation cotton, thereby effectively reducing the heat radiated downward, avoiding excessive temperature rise below the furnace body, and making most of the heat radiate upward through the microcrystalline glass plate, improving the energy utilization rate of the electric grill.

[0010] In one embodiment, the electric oven further includes a mounting plate. The mounting plate is provided with an oil guide groove that has an open top and is annular. The upper end located radially inside the oil guide groove is folded outward in the radial direction of the oil guide groove to form a support portion. The microcrystalline glass plate is fixed to the mounting plate. An installation cavity is formed by enclosing the radially inner side of the oil guide groove, and the heat insulation cotton is arranged in the installation cavity.

[0011] In one embodiment, the mounting plate is of an annular structure. The mounting plate includes an annular bottom wall, an inner ring wall and an outer ring wall that both extend in the vertical direction. The outer ring wall surrounds the outer side of the inner ring wall. The radially inner and outer edges of the bottom wall are respectively connected to the inner ring wall and the outer ring wall to enclose the oil guide groove, and the support portion protrudes from the inner ring wall.

[0012] In one embodiment, the electric oven further includes a furnace body. The mounting plate is installed on the furnace body, and the heat insulation cotton is supported on the top surface of the furnace body.

[0013] In one embodiment, two limiting brackets are oppositely arranged on the inner ring wall, and the heat insulation cotton is limited between the two limiting brackets.

[0014] In one embodiment, the two limiting brackets are arranged at intervals in the first horizontal direction. The limiting bracket includes two first limiting portions and a first connecting portion that extends in the second horizontal direction. The two first limiting portions respectively protrude from both ends of the first connecting portion; the first horizontal direction and the second horizontal direction are perpendicular;

[0015] The heat insulation cotton is clamped between the two first connecting portions in the first horizontal direction, and the heat insulation cotton is clamped between the two first limiting portions of any one of the limiting brackets in the second horizontal direction.

[0016] In one embodiment, at least two conductive films that are electrically connected to the lower surface of the graphene heating film and are arranged at intervals in the horizontal direction are provided. One end of the conductive film is welded with a wiring portion;

[0017] Each of the conductive films is connected to one of the wiring portions. At least one of the wiring portions is used to connect the positive electrode of an external power supply, and the other wiring portions are used to connect the negative electrode of the external power supply;

[0018] When there are at least three conductive films, among three adjacent conductive films, the graphene heating films on both sides of the conductive film located in the middle are connected in parallel.

[0019] In one embodiment, at least two of the wiring portions are arranged at the same end of the conductive film.

[0020] In one embodiment, an avoidance notch is provided on the mica sheet, and the wiring portion penetrates through the avoidance notch.

[0021] In one embodiment, the electric oven further includes a temperature detection unit. A first avoidance hole is provided on the mica sheet, and a second avoidance hole corresponding to the first avoidance hole is provided on the heat insulation cotton. The detection end of the temperature detection unit penetrates through the second avoidance hole and the first avoidance hole. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the electric oven provided by an embodiment of the present invention;

[0023] Figure 2 is a disassembled schematic diagram of the electric oven (the furnace body is not shown) provided by an embodiment of the present invention Figure 1 ;

[0024] Figure 3 is a schematic diagram of the heating component provided by an embodiment of the present invention;

[0025] Figure 4 is a disassembled schematic diagram of the electric oven (the furnace body is not shown) provided by an embodiment of the present invention Figure 2 ;

[0026] Figure 5 is Figure 4 a partial enlarged schematic diagram at A in

[0027] Figure 6 is a schematic structural diagram of the connection unit provided by an embodiment of the present invention;

[0028] Figure 7 is a disassembled schematic diagram of the electric oven (the heating component is not shown) provided by an embodiment of the present invention Figure 3 。

[0029] Label Description:

[0030] 1. Heating component; 11. Microcrystalline glass plate; 12. Graphene heating film; 2. Mica sheet; 21. Avoidance notch; 22. First avoidance hole; 3. Heat insulation cotton; 31. Second avoidance hole; 4. Conductive film; 5. Wiring portion; 6. Mounting plate; 61. Support portion; 62. Oil guide groove; 63. Outer ring wall; 64. Installation cavity; 65. Inner ring wall; 66. Bottom wall; 7. Sealing member; 8. Furnace body; 9. Limit bracket; 91. First connection portion; 92. First limit portion; 10. Connection unit; 101. Crimping portion; 102. Second connection portion; 103. Second limit portion; 20. Temperature detection unit. Detailed Embodiments

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0032] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 thus should not be construed as a limitation to the present application.

[0033] The terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "plurality" is two or more.

[0034] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0035] This embodiment provides an electric grill, which can reduce the heat radiated downward, thereby improving the energy utilization rate of the graphene electric grill.

[0036] As Figures 1 to 4 shown, the electric grill includes a heating component 1, a mica sheet 2, and a heat insulation cotton 3. The heating component 1 includes a microcrystalline glass plate 11 and a graphene heating film 12 laid on the lower surface of the microcrystalline glass plate 11. The mica sheet 2 is laid on the lower surface of the graphene heating film 12, and the heat insulation cotton 3 is laid on the lower surface of the mica sheet 2.

[0037] The electric oven further includes an oven body 8, and the heat insulation cotton 3 is arranged above the oven body 8. Since the mica sheet 2 has good high-temperature resistance but relatively poor heat insulation performance, while the heat insulation cotton 3 has good heat insulation performance but relatively poor high-temperature resistance, this electric oven lays the mica sheet 2 on the lower surface of the graphene heating film 12 and lays the heat insulation cotton 3 on the lower surface of the mica sheet 2, making use of the complementarity of the mica sheet 2 and the heat insulation cotton 3. First, the mica sheet 2 with better high-temperature resistance than heat insulation performance is used for primary heat insulation, and then the heat insulation cotton 3 with better heat insulation performance than high-temperature resistance is used for secondary heat insulation, realizing double heat insulation through the mica sheet 2 and the heat insulation cotton 3, thereby effectively reducing the heat radiated downward, avoiding excessive temperature rise below the oven body 8, and making most of the heat radiate upward through the microcrystalline glass plate 11, improving the energy utilization rate of the electric oven.

[0038] In some embodiments, as Figure 3 shown, at least two conductive films 4 electrically connected to the graphene heating film 12 are arranged on the lower surface of the graphene heating film 12, and a wiring part 5 is welded to one end of the conductive film 4, and the wiring part 5 is used for connecting an external power supply.

[0039] The external power supply powers the conductive film 4 through the wiring part 5, and the graphene heating film 12 electrically connected to the conductive film 4 generates heat and radiates upward through the microcrystalline glass plate 11 to heat the food in the upper cookware.

[0040] The wiring part 5 and the conductive film 4 are welded and fixed, such as by soldering, and the connection method is simple and fast; by adding the conductive film 4, the external power supply powers the graphene heating film 12 through the wiring part 5 and the conductive film 4, and no solder joints will be generated on the microcrystalline glass plate 11.

[0041] Exemplarily, there are two conductive films 4, and the two conductive films 4 are arranged at intervals in the horizontal direction. For example, the two conductive films 4 are arranged at the two end edges of the graphene heating film 12 along the length direction of the electric oven, or the two conductive films 4 are arranged at the two end edges of the graphene heating film 12 along the width direction of the electric oven.

[0042] It should be noted that the wiring part 5 can adopt a columnar structure, and can also adopt a block structure, etc. Exemplarily, the wiring part 5 is a columnar structure.

[0043] In other embodiments, more than two of the above-mentioned conductive films 4 may be provided. The multiple conductive films 4 are arranged at intervals in the horizontal direction. Each conductive film 4 is connected to a wiring portion 5. At least one wiring portion 5 is used to connect to the positive electrode of an external power supply, and the other wiring portions 5 are used to connect to the negative electrode of the external power supply. Among two adjacent conductive films 4, the graphene heating films 12 on both sides of the middle conductive film 4 are arranged in parallel. For example, when three conductive films 4 are provided, the middle conductive film 4 is used to connect to one of the positive and negative electrodes of the external power supply through the wiring portion 5, and the other two conductive films 4 are used to connect to the other of the positive and negative electrodes of the power supply through the wiring portion 5, so as to realize the parallel arrangement of the graphene heating films 12 on both sides of the middle conductive film 4, reduce the heat generation amount of the graphene heating films 12 on both sides of the middle conductive film 4, and at the same time ensure that the thermal power of the electric oven meets the usage requirements. At this time, the entire graphene heating film 12 may not need to be partitioned. For example, when four conductive films 4 are provided, in order to avoid wiring chaos, among any three adjacent conductive films 4, the graphene heating films 12 on both sides of the middle conductive film 4 are independently arranged, that is, the graphene heating film 12 is partitioned. The graphene heating films 12 in different regions do not contact each other.

[0044] In some embodiments, such as Figure 3 shown, at least two wiring portions 5 are provided at the same end of the conductive film 4. With this arrangement, it is convenient to electrically connect the positive and negative electrodes of the external power supply to the corresponding wiring portions 5 and avoid wiring chaos. Exemplarily, two conductive films 4 are provided. The two conductive films 4 are arranged at intervals in the first horizontal direction. The conductive film 4 is arranged in an L shape and includes a first conductive portion extending in the second horizontal direction and a second conductive portion connected to one end of the first conductive portion in the second horizontal direction. The two first conductive portions are distributed at the same end of the graphene heating film 12 in the second horizontal direction. The two second conductive portions are located between the two first conductive portions. The wiring portion 5 is connected to the end of the corresponding second conductive portion away from the first conductive portion to reduce the distance between the two wiring portions 5 in the first horizontal direction and facilitate the connection of the external power supply. Among them, the first horizontal direction and the second horizontal direction are perpendicular.

[0045] In some embodiments, the graphene heating film 12 is coated on the lower surface of the microcrystalline glass plate 11, and the conductive film 4 is coated on the lower surface of the graphene heating film 12.

[0046] In some embodiments, such as Figure 2 and Figure 4 、 Figure 5 shown, the electric oven further includes a mounting plate 6. The mounting plate 6 is provided with an oil guide groove 62 that is open at the top and annular. The upper end of the inner side in the radial direction of the oil guide groove 62 is folded outward in the radial direction of the oil guide groove 62 to form a support portion 61. The microcrystalline glass plate 11 is fixed to the mounting plate 6. An installation cavity 64 is formed by enclosing the inner side in the radial direction of the oil guide groove 62, and the heat insulation cotton 3 is arranged in the installation cavity 64.

[0047] The oil stains on the upper surface of the microcrystalline glass plate 11 fall from the circumferential edge of the upper surface of the microcrystalline glass plate 11 and fall into the oil guide groove 62, which can prevent the oil stains from falling into the radially inner side of the support portion 61 and contaminating the components on the radially inner side of the support portion 61. Moreover, by arranging the heat insulation cotton 3 in the installation cavity 64, the layout of each component of the entire electric oven is relatively reasonable, and the occupied space of the electric oven in the vertical direction can be reduced.

[0048] Specifically, the mounting plate 6 is of an annular structure. The mounting plate 6 includes an annular bottom wall 66, and an inner ring wall 65 and an outer ring wall 63 that both extend in the vertical direction. The outer ring wall 63 surrounds the outer side of the inner ring wall 65. The radially inner and outer edges of the bottom wall 66 are respectively connected to the inner ring wall 65 and the outer ring wall 63 to form the above-mentioned oil guide groove 62, and the support portion 61 protrudes from the inner ring wall 65. Exemplarily, the mounting plate 6 is a structural member formed by stamping and bending, with low cost and easy to form. During the stamping process of the mounting plate 6, the above-mentioned oil guide groove 62 is directly formed, and then bending is performed to form the above-mentioned support portion 61.

[0049] In some embodiments, such as Figure 2 and Figure 4 、 Figure 5 As shown, a seal 7 is provided between the microcrystalline glass plate 11 and the support portion 61. The seal 7 surrounds the outer sides of the graphene heating film 12, the mica sheet 2, and the heat insulation cotton 3. By providing the seal 7, it can effectively prevent the oil stains from splashing into the gap between the microcrystalline glass plate 11 and the support portion 61 when falling into the oil guide groove 62; moreover, by surrounding the seal 7 around the outer sides of the graphene heating film 12, the mica sheet 2, and the heat insulation cotton 3, it can prevent the graphene heating film 12, the mica sheet 2, and the heat insulation cotton 3 from being contaminated with oil stains, which is beneficial to maintaining the cleanliness of the graphene heating film 12, the mica sheet 2, and the heat insulation cotton 3.

[0050] Exemplarily, the seal 7 is of an annular structure. It should be noted that the microcrystalline glass plate 11 can be circular, square, rectangular, etc., which is specifically determined according to actual needs. Correspondingly, the above-mentioned sealing ring can be circular, square, rectangular, etc. Exemplarily, the microcrystalline glass plate 11 is rectangular, and correspondingly, the sealing ring is rectangular.

[0051] Specifically, an annular groove is formed on the inner circumferential surface of the seal 7, and the circumferential edge of the microcrystalline glass plate 11 is wrapped in the annular groove.

[0052] In some embodiments, such as Figure 1 and Figure 2As shown, the mounting plate 6 is mounted on the furnace body 8, and the heat insulation cotton 3 is supported on the top surface of the furnace body 8. Specifically, fasteners pass through the bottom wall 66 of the mounting plate 6 and are threadedly connected to the furnace body 8 to fix the mounting plate 6 to the furnace body 8, and the furnace body 8 is used to support the heat insulation cotton 3 to clamp the heat insulation cotton 3 between the top surface of the furnace body 8 and the mica sheet 2 in the vertical direction, so as to limit the heat insulation cotton 3 in the vertical direction. Specifically, the furnace body 8 includes a reflector, and the lower surface of the heat insulation cotton 3 contacts the upper surface of the reflector.

[0053] In some embodiments, as Figure 2 and Figure 4 shown, two limiting brackets 9 are fixed on the inner ring wall 65 and are arranged oppositely, and the heat insulation cotton 3 is limited between the two limiting brackets 9.

[0054] Specifically, the two limiting brackets 9 are arranged at intervals in the first horizontal direction. The limiting bracket 9 includes a first connecting portion 91 extending in the second horizontal direction, and two first limiting portions 92 protruding from the first connecting portion 91 and arranged at intervals in the second horizontal direction. The heat insulation cotton 3 is clamped between the two first connecting portions 91 in the first horizontal direction, and the heat insulation cotton 3 is clamped between the two first limiting portions 92 of any one limiting bracket 9 in the second horizontal direction.

[0055] The two first connecting portions 91 are used to limit the heat insulation cotton 3 in the first horizontal direction, and the two first limiting portions 92 of each limiting bracket 9 are used to limit the heat insulation cotton 3 in the second horizontal direction, so as to prevent the heat insulation cotton 3 from moving horizontally.

[0056] Among them, the first horizontal direction can be the length direction of the electric oven or the width direction of the electric oven, and will not be specifically limited here.

[0057] Exemplarily, the first connecting portion 91 and the first limiting portion 92 connected thereto are integrally formed, and the first connecting portion 91 is welded and fixed to the inner peripheral wall of the installation cavity 64, and the connection method is simple and convenient for disassembly and assembly.

[0058] Exemplarily, the limiting bracket 9 is connected to the furnace body 8 through fasteners. Specifically, the first connecting portion 91 is a thin-walled structure provided with a weight-reducing groove, and the first connecting portion 91 is a U-shaped structure with an open top. The installation through hole for passing the fastener is arranged at the bottom wall of the weight-reducing groove, which can not only meet the weight-reducing requirement to lighten the electric oven.

[0059] In some other embodiments, the limiting bracket 9 and the mounting plate 6 can also be set as an integrally formed structural member. Specifically, the installation cavity 64 is set as a stepped hole, and the aperture of the installation cavity 64 close to the furnace body 8 is larger than the aperture of the installation cavity 64 close to the microcrystalline glass plate 11, so that an annular installation portion is formed at one end of the mounting plate 6 close to the furnace body 8, and the installation portion is connected to the furnace body 8 through a plurality of fasteners arranged at intervals in the circumferential direction.

[0060] In some embodiments, the installation cavity 64 has two first limiting inner walls oppositely arranged along the first horizontal direction and two second limiting inner walls oppositely arranged along the second horizontal direction; the mica sheet 2 is clamped between the two first limiting inner walls along the first horizontal direction, and the mica sheet 2 is clamped between the two second limiting inner walls along the second horizontal direction; the mica sheet 2 is clamped between the heating component 1 and the heat insulation cotton 3 along the vertical direction. With such an arrangement, it is possible to limit the mica sheet 2 and the heat insulation cotton 3 by the inner wall of the installation cavity 64 along the first horizontal direction and the second horizontal direction, and to limit the mica sheet 2 by the heating component 1 and the heat insulation cotton 3 along the vertical direction.

[0061] In some embodiments, such as Figure 4 and Figure 6 shown, the electric oven further includes a connection unit 10, and the connection unit 10 includes a crimping portion 101 and a second connection portion 102. Among them, the crimping portion 101 is arranged at the circumferential edge of the microcrystalline glass plate 11 and crimps on the upper surface of the microcrystalline glass plate 11; the crimping portion 101 is connected to the mounting plate 6 through the second connection portion 102.

[0062] Specifically, there are four connection units 10, two of the connection units 10 are arranged at intervals along the first horizontal direction, and the other two connection units 10 are arranged at intervals along the second horizontal direction, and the first horizontal direction and the second horizontal direction are perpendicular.

[0063] Connect the second connection portion 102 to the mounting plate 6, so that the crimping portion 101 crimps on the circumferential edge of the upper surface of the microcrystalline glass plate 11, thereby clamping the microcrystalline glass plate 11 between the crimping portion 101 and the supporting portion 61, without opening holes on the upper surface of the microcrystalline glass plate 11.

[0064] Exemplarily, the crimping portion 101 is horizontally arranged, the second connection portion 102 is vertically arranged, the crimping portion 101 and the second connection portion 102 are connected to form an L-shaped plate, and each crimping portion 101 is connected to the outer ring wall 63 through at least two fasteners arranged at intervals.

[0065] In some other embodiments, the connection unit 10 can also be set as an annular sleeve, that is, multiple connection units 10 are set as a whole.

[0066] In some embodiments, such as Figure 4 and Figure 6As shown, the connecting unit 10 further includes a second limiting portion 103 protruding from the lower surface of the crimping portion 101, and the microcrystalline glass plate 11 is clamped between the second limiting portions 103 of two connecting units 10 distributed along the first horizontal direction; the microcrystalline glass plate 11 is clamped between the second limiting portions 103 of two connecting units 10 distributed along the second horizontal direction. With such a setting, the microcrystalline glass plate 11 is limited in the first horizontal direction and the second horizontal direction, preventing the microcrystalline glass plate 11 from moving in the horizontal direction.

[0067] Specifically, the crimping portion 101 is subjected to stamping and shearing to form an opening on the crimping portion 101, and a second limiting portion 103 that is bent downward is formed on one side of the opening, that is, the second limiting portion 103 and the crimping portion 101 are integrally formed. In other embodiments, the second limiting portion 103 can also be welded and fixed to the lower surface of the crimping portion 101.

[0068] In the embodiment of the present utility model, only the second connecting portion 102 needs to be connected to the mounting plate 6 through a fastener, and the limiting bracket 9 needs to be connected to the furnace body 8 through a fastener, so that the heating component 1, the mica sheet 2, and the heat insulation cotton 3 can be clamped between the crimping portion 101 and the top surface of the furnace body 8 in the vertical direction. The mica sheet 2 is limited in the first horizontal direction and the second horizontal direction by the inner wall of the installation cavity 64, and the heat insulation cotton 3 is limited in the first horizontal direction and the second horizontal direction by the limiting bracket 9. The limiting method is simple, the cost is low, and the disassembly and assembly are convenient and fast.

[0069] In some embodiments, as Figure 7 shown, the mica sheet 2 is provided with an avoidance notch 21, and the wiring portion 5 penetrates through the avoidance notch 21. Exemplarily, the avoidance notch 21 is provided on the outer peripheral wall of the mica sheet 2 and penetrates in the vertical direction. It should be noted that at least two wiring portions 5 can be passed through the same avoidance notch 21, or the number of avoidance notches 21 can be determined according to the number of wiring portions 5, and the number of wiring portions 5 is determined according to the number of conductive films 4.

[0070] In some embodiments, as Figure 7 shown, the electric oven further includes a temperature detection unit 20 installed on the furnace body 8. The mica sheet 2 is provided with a first avoidance hole 22, and the heat insulation cotton 3 is provided with a second avoidance hole 31 corresponding to the first avoidance hole 22. The detection end of the temperature detection unit 20 penetrates through the second avoidance hole 31 and the first avoidance hole 22.

[0071] In some embodiments, along the second horizontal direction, the first limiting portion 92 is closer to the central axis of the installation cavity 64 than the wiring portion 5. With such a setting, the heat insulation cotton 3 can be prevented from interfering with the arrangement of the wiring portion 5.

[0072] In the specific content of the above specific embodiments, each technical feature can be combined arbitrarily without contradiction. For the sake of concise description, not all possible combinations of the above technical features are described. However, as long as the combinations of these technical features do not exist in contradiction, they should all be considered as the scope recorded in this specification.

[0073] The specific content of the above specific embodiments only expresses several embodiments of the present utility model, and its description is relatively specific and detailed, but it should not be understood as a limitation to the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model should be subject to the appended claims.

Claims

1. An electric oven, characterized in that: The invention comprises a heating component (1), a mica sheet (2) and thermal insulation cotton (3), wherein the heating component (1) comprises a microcrystalline glass plate (11) and a graphene heating film (12) laid on the lower surface of the microcrystalline glass plate (11), the mica sheet (2) is laid on the lower surface of the graphene heating film (12), and the thermal insulation cotton (3) is laid on the lower surface of the mica sheet (2).

2. The electric oven according to claim 1, characterized in that: The electric oven also includes a mounting plate (6), wherein the mounting plate (6) is provided with an oil guide groove (62) which is open at the top and is in the shape of an annular ring, wherein the upper end located on the radial inner side of the oil guide groove (62) is folded toward the radial outer side of the oil guide groove (62) to form a support portion (61), wherein the microcrystalline glass plate (11) is fixed to the mounting plate (6), wherein the radial inner side of the oil guide groove (62) encloses a mounting cavity (64), and the heat insulating cotton (3) is arranged in the mounting cavity (64).

3. The electric oven according to claim 2, characterized in that: The mounting plate (6) is an annular structure, comprising an annular bottom wall (66), and an inner annular wall (65) and an outer annular wall (63) both extending in a vertical direction, the outer annular wall (63) being arranged outside the inner annular wall (65), the radial inner and outer edges of the bottom wall (66) being respectively connected to the inner annular wall (65) and the outer annular wall (63) to form the oil guide groove (62), and the support portion (61) being protruding from the inner annular wall (65).

4. The electric oven according to claim 3, characterized in that: The electric oven further comprises an oven body (8), the mounting plate (6) is mounted on the oven body (8), and the heat insulating cotton (3) is supported on the top surface of the oven body (8).

5. The electric oven according to claim 3, characterized in that: The inner ring wall (65) is provided with two position limiting brackets (9) arranged opposite to each other, and the heat insulating cotton (3) is limited between the two position limiting brackets (9).

6. The electric oven according to claim 5, characterized in that: The two limiting brackets (9) are arranged at intervals along the first horizontal direction, the limiting bracket (9) comprises two first limiting portions (92) and a first connecting portion (91) extending along the second horizontal direction, the two first limiting portions (92) are respectively protruded at two ends of the first connecting portion (91); the first horizontal direction is perpendicular to the second horizontal direction; The heat insulating cotton (3) is clamped between the two first connecting parts (91) along the first horizontal direction, and the heat insulating cotton (3) is clamped between the two first limiting parts (92) of any one of the limiting brackets (9) along the second horizontal direction.

7. The electric oven according to claim 1, characterized in that: The lower surface of the graphene heating film (12) is provided with at least two conductive films (4) electrically connected thereto and arranged at intervals in the horizontal direction, and one end of the conductive film (4) is welded with a wiring portion (5); Each of the conductive films (4) is connected to a connection portion (5), at least one of the connection portions (5) is used to connect to the positive electrode of the external power supply, and the other connection portions (5) are used to connect to the negative electrode of the external power supply; When at least three conductive films (4) are provided, the graphene heating films (12) located on both sides of the conductive film (4) in the middle of the three adjacent conductive films (4) are arranged in parallel.

8. The electric oven according to claim 7, characterized in that: At least two of the wiring portions (5) are arranged at the same end of the conductive film (4).

9. The electric oven according to claim 7, characterized in that: The mica sheet (2) is provided with an escape notch (21), and the wiring portion (5) is arranged to pass through the escape notch (21).

10. The electric oven according to claim 7, characterized in that: The electric oven further comprises a temperature detection unit (20); the mica sheet (2) is provided with a first avoidance hole (22); the heat insulating cotton (3) is provided with a second avoidance hole (31) arranged corresponding to the first avoidance hole (22); and a detection end of the temperature detection unit (20) is inserted through the second avoidance hole (31) and the first avoidance hole (22).

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