Cooking apparatus

Abstract

The utility model provides a kind of cooking equipment, it is related to domestic appliance technical field, the cooking equipment includes shell, the shell includes panel and bottom shell, the panel and the bottom shell are enclosed and form accommodating cavity;Coil disc, the coil disc is located in accommodating cavity, the coil disc is used to generate alternating magnetic field;Non-magnetic conductor piece, the non-magnetic conductor piece is located between the coil disc and the panel, the non-magnetic conductor piece can be supplied with the alternating magnetic field pass through, and the non-magnetic conductor piece is configured to heat in the alternating magnetic field;And first elastic member, the first elastic member is located in the accommodating cavity, and is connected with the coil disc, the first elastic member is used to exert elastic force to the coil disc, to make the non-magnetic conductor piece and the panel adhere to each other under the pressure of the coil disc.The cooking equipment provided by the utility model can be suitable for different material's pot, and the applicability is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to domestic appliance technical field especially relates to a cooking equipment. BACKGROUND

[0002] The electromagnetic oven is a common cooking equipment, has the advantages such as high heating efficiency, fast heating speed, electric heating use safety.

[0003] In prior art, the electromagnetic oven has panel and coil disc, and the coil disc can generate alternating magnetic field when electrified, when the iron cookware with magnetic conductivity is placed on the panel, the alternating magnetic field can cut the cookware, thereby alternating current (i.e. eddy current) is generated in the bottom of the cookware, so that the cookware self-heating to heat food.

[0004] However, the conventional electromagnetic oven can only heat the cookware of magnetic conductive material, and cannot heat the cookware of other materials, such as ceramic pot, sand pot, etc. SUMMARY

[0005] In view of the above problems, the utility model embodiment provides a cooking equipment, which can heat the cookware of magnetic conductive material and the cookware of non-magnetic conductive material, and has high applicability.

[0006] In order to achieve the above purpose, the utility model embodiment provides the following technical scheme:

[0007] The utility model embodiment provides a cooking equipment, which comprises:

[0008] The shell comprises a panel and a bottom shell, and the panel and the bottom shell enclose a receiving cavity;

[0009] The coil disc is located in the receiving cavity, and the coil disc is used for generating alternating magnetic field;

[0010] The non-magnetic conductive conductor is located between the coil disc and the panel, the non-magnetic conductive conductor can be passed through the alternating magnetic field, and the non-magnetic conductive conductor is configured to heat in the alternating magnetic field;

[0011] And the first elastic member is located in the receiving cavity and connected with the coil disc, and the first elastic member is used for applying elastic force to the coil disc, so that the non-magnetic conductive conductor is attached to the panel under the pressure of the coil disc.

[0012] Thus, the non-magnetic conductor piece has little influence on the conduction of the alternating magnetic field, and when the pot with magnetic property is used, the alternating magnetic field can pass through the non-magnetic conductor piece with little loss and directly act on the pot, so that the alternating current is generated on the pot, and the pot with magnetic property is heated. In addition, the non-magnetic conductor piece can generate heat in the alternating magnetic field, and the non-magnetic conductor piece can conduct heat to the outside, and since the non-magnetic conductor piece is attached to the panel, the non-magnetic conductor piece can conduct heat to the panel to heat the panel. Thus, when the pot with magnetic property and the pot without magnetic property are used, the panel can heat the pot, and the applicability of the cooking device is high.

[0013] In some embodiments, the coil disc comprises a coil support and a coil arranged on the coil support, the first end of the first elastic member is connected to the inner surface of the bottom shell, and the second end of the first elastic member is matched with the coil support to apply elastic force to the coil support, so that the non-magnetic conductor piece is attached to the panel under the pressure of the coil support. Thus, the non-magnetic conductor piece can be prevented from pressing against the coil, and the coil can be prevented from being heated by absorbing heat from the non-magnetic conductor piece, thereby prolonging the service life of the coil.

[0014] In some embodiments, a plurality of guide columns are arranged on the bottom shell at intervals, the extension directions of the plurality of guide columns are all towards the panel, and the first elastic member is correspondingly sleeved on each guide column, and the second end of the first elastic member is abutted on the side of the coil support facing the bottom shell. Thus, the first elastic member can be prevented from being deformed and deviated, so that the coil disc cannot be effectively pressed.

[0015] In some embodiments, a plurality of first guide holes are arranged on the coil support, the guide column and the first guide hole are slidably connected, and the second end of the first elastic member is abutted on the area of the coil support close to the first guide hole. Thus, the coil disc can be limited, and the coil disc can be prevented from being displaced relative to the first elastic member.

[0016] In some embodiments, the plurality of first guide holes are arranged at intervals along the circumference of the coil support. Thus, the coil disc can be uniformly stressed and stably supported in the shell.

[0017] In some embodiments, the coil support is provided with a wire groove and a pressing portion, the opening of the wire groove faces the panel and is used for accommodating the coil, the pressing portion is located at the end of the wire groove close to the panel, and the non-magnetic conductor piece is clamped between the pressing portion and the panel.

[0018] The pressing part extends along the circumference of the coil, so that the projection of the non-magnetic conductor on the panel at least partially overlaps with the projection of the coil on the panel. In this way, the alternating magnetic field can act on the non-magnetic conductor as much as possible, the magnetic field leakage is reduced, and the heating efficiency of the cooking device is improved.

[0019] In some embodiments, the pressing part is provided with a pressing wall surface and a limiting wall surface connected thereto, and the pressing wall surface and the limiting wall surface are arranged at an angle;

[0020] The non-magnetic conductor is clamped between the pressing wall surface and the panel, and the limiting wall surface extends towards one side of the panel and surrounds the outside of the circumference of the non-magnetic conductor;

[0021] The distance between the pressing wall surface and the bottom wall surface of the winding groove is greater than the thickness of the coil.

[0022] In this way, the gap between the non-magnetic conductor and the coil can cool the coil, avoiding excessive temperature of the coil.

[0023] In some embodiments, the pressing part is a plurality of pressing parts, and the plurality of pressing parts are arranged at intervals along the circumference of the coil. In this way, the non-magnetic conductor can be stably fixed between the panel and the coil disc.

[0024] In some embodiments, the cooking device further comprises a temperature measuring member and a second elastic member;

[0025] The coil support is provided with a second guide hole extending towards one side of the panel, the temperature measuring member extends into the second guide hole and is connected to the second guide hole in a slidable plug-in manner;

[0026] One end of the second elastic member is connected to the coil support, and the other end is connected to the temperature measuring member. The second elastic member is used to apply an elastic force to the temperature measuring member, so that the temperature measuring member abuts against the panel or the non-magnetic conductor. In this way, the temperature measuring member can effectively abut against the position of the panel or the non-magnetic conductor to be tested.

[0027] In some embodiments, the temperature measuring member is provided with a first limiting part protruding from the outer wall surface of the temperature measuring member, and the first limiting part and the panel are located at two ends of the second guide hole. In this way, the temperature measuring member can be prevented from being pulled out of the second guide hole under the action of the elastic force of the first elastic member.

[0028] In some embodiments, the first limiting part extends along the circumference of the temperature measuring member and covers part of the outer wall surface of the temperature measuring member;

[0029] The second guide hole has a first hole part and a second hole part in communication, the first hole part is used for plug-in cooperation with the temperature measuring piece;

[0030] The first limiting part is configured to rotate around the axis of the first hole part and be opposite to the second hole part, and can be detached from the second guide hole under the elastic force of the second elastic piece. In this way, the temperature measuring piece can be conveniently and quickly disassembled and assembled.

[0031] In some embodiments, the inner wall surface of the panel facing the coil disc is provided with a limiting groove, the non-magnetic conductor is located in the limiting groove, and the side wall surface of the limiting groove is configured to limit the non-magnetic conductor. In this way, the non-magnetic conductor can be limited to avoid displacement along the direction parallel to the panel.

[0032] In some embodiments, the thickness of the non-magnetic conductor satisfies the following relationship:

[0033]

[0034]

[0035] H, δ, ω, and σ are the thickness of the non-magnetic conductor (mm), the skin depth (mm), the angular frequency of the alternating magnetic field (rad / s), and the electrical conductivity of the non-magnetic conductor (S / m), respectively.

[0036] In this way, when the thickness H of the non-magnetic conductor satisfies certain conditions, the non-magnetic conductor can be heated by the partial alternating magnetic field, and the partial alternating magnetic field can pass through the non-magnetic conductor. When a pot with magnetic properties is used, the alternating magnetic field can pass through the non-magnetic conductor and directly act on the pot, generating an alternating current on the pot, which rapidly heats the pot. Since the non-magnetic conductor can be heated in the alternating magnetic field, the non-magnetic conductor can conduct heat to the outside, for example, the non-magnetic conductor can conduct heat to the pot to heat the pot. In this way, when a magnetic pot or a non-magnetic pot is used, the pot can be heated by the panel, and the applicability of the cooking device is higher.

[0037] In some embodiments, the material of the non-magnetic conductor is at least one of titanium, graphite, graphene, aluminum, and copper. The non-magnetic conductor has no or poor magnetic properties, the alternating magnetic field can pass through the non-magnetic conductor and directly act on the pot, and the non-magnetic conductor can have good electrical conductivity, which can generate more eddy current and heat in the alternating magnetic field.

[0038] ​​In some embodiments, the material of the non-magnetic conductor is graphite, and the thickness of the non-magnetic conductor is 0.5mm-20mm. In this way, the graphite can generate more induction heat and conduct more heat.

[0039] In some embodiments, the cooking device further comprises a heat insulation member, which is arranged on the coil disc and clamped between the non-magnetic conductor and the coil disc. In this way, the heat conduction of the non-magnetic conductor towards the side away from the panel can be reduced, so that more heat is conducted towards the panel side, and the heating efficiency of the panel is higher.

[0040] In some embodiments, the heat insulation member is provided with a receiving groove, and the non-magnetic conductor is arranged in the receiving groove. In this way, the heat conduction of the non-magnetic conductor towards the side away from the panel and towards the direction parallel to the panel can be reduced, so that more heat is conducted towards the panel side, and the heating efficiency of the panel is higher.

[0041] In some embodiments, the coil disc is provided with a magnetic member on the side away from the panel; the first end of the magnetic member is bent and extends towards the side of the panel, and surrounds the outside of the coil, and the gap between the first end of the magnetic member and the panel is less than or equal to the thickness of the non-magnetic conductor.

[0042] In this way, the alternating magnetic field can be more concentrated on the non-magnetic conductor, which helps the induction heat generated by each part of the non-magnetic conductor to be more uniform, and the alternating magnetic field can also be more concentrated on the pot.

[0043] In some embodiments, the coil is annular; the second end of the magnetic member is bent and extends towards the side of the panel, and the coil surrounds the outside of the second end of the magnetic member. In this way, the attenuation loss of the alternating magnetic field during conduction can be lower, so that the alternating magnetic field can act on the pot and the non-magnetic conductor with more energy, and the heating efficiency of the cooking device can be improved.

[0044] In some embodiments, the gap between the second end of the magnetic member and the panel is less than or equal to the thickness of the non-magnetic conductor. In this way, the alternating magnetic field can be more concentrated on the non-magnetic conductor, which helps the induction heat generated by each part of the non-magnetic conductor to be more uniform, and the alternating magnetic field can also be more concentrated on the pot.

[0045] In some embodiments, the cooking device further comprises a heat dissipation fan, and the bottom shell is provided with a wind guide protrusion, which is annular and protrudes towards the side of the coil, and the air inlet of the wind guide protrusion is opposite to the air outlet end of the heat dissipation fan.

[0046] The area of ​​the air outlet protrusion is smaller than the projected area of ​​the coil on the panel. This effectively cools the coil and prevents it from overheating.

[0047] In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions as described above, other technical problems that the cooking equipment provided by the embodiments of the present invention can solve, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 A schematic diagram of the structure of the cooking equipment provided in the embodiment of this utility model;

[0050] Figure 2 Another structural schematic diagram of the cooking device provided in this embodiment of the utility model;

[0051] Figure 3 This is a cross-sectional view of the cooking equipment provided in an embodiment of the present utility model;

[0052] Figure 4 Another cross-sectional view of the cooking device provided in this embodiment of the utility model;

[0053] Figure 5 This is an exploded structural diagram of the cooking equipment provided in an embodiment of the present utility model;

[0054] Figure 6 This is an exploded structural diagram of the coil in the cooking device provided in this embodiment of the utility model;

[0055] Figure 7 This is a schematic diagram of the structure of the coil support in the cooking device provided in the embodiment of the present utility model;

[0056] Figure 8 for Figure 7 A partial structural diagram of part A in the middle;

[0057] Figure 9 Another structural schematic diagram of the panel in the cooking device provided in this embodiment of the utility model;

[0058] Figure 10 A structure diagram of the air guide protrusion in the cooking equipment provided by the embodiment of the utility model;

[0059] Figure 11 Another structure diagram of the air guide protrusion in the cooking equipment provided by the embodiment of the utility model.

[0060] Reference signs:

[0061] 1-cooking equipment;

[0062] 10-housing; 11-panel; 111-limiting groove; 112-supporting part; 113-connecting part; 12-bottom shell; 121-guide column; 122-air guide protrusion;

[0063] 20-coil disc;

[0064] 21-coil support; 211-first guide hole; 212-winding groove; 213-pressing part; 2131-pressing wall surface; 2132-limiting wall surface; 214-second guide hole; 2141-first hole part; 2142-second hole part;

[0065] 22-coil;

[0066] 23-magnetic part; 231-body part; 232-first bending section; 233-second bending section;

[0067] 30-non-magnetic conductor part;

[0068] 40-first elastic part;

[0069] 50-temperature measuring part; 51-first limiting part; 52-second limiting part;

[0070] 60-second elastic part;

[0071] 70-heat insulation part; 71-receiving groove;

[0072] 80-radiation fan;

[0073] 90-circuit board. DETAILED DESCRIPTION

[0074] In order to make the above-mentioned purpose, characteristics and advantages of the embodiments of the utility model more apparent, clear and comprehensible, the technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the utility model.

[0075] The electromagnetic oven is a commonly used cooking equipment, which is different from the traditional open fire stove, and has the advantages of high heating efficiency, fast heating speed and safe electric heating.

[0076] In the related art, the electromagnetic oven is provided with a coil disc, and the coil disc can generate an alternating magnetic field after being powered. Then, according to the principle of electromagnetic induction, when a pot with magnetic permeability is placed on the electromagnetic oven, the alternating magnetic field can cut the pot, thereby generating an alternating current (i.e. eddy current) at the bottom of the pot, so that the pot self-heats to heat food.

[0077] That is, according to the working principle of the electromagnetic oven, the electromagnetic oven is usually only applicable to pots with magnetic permeability, such as iron pots or other alloy pots containing magnetic permeability components (iron, cobalt, nickel and their alloys), and is not applicable to ceramic pots, sand pots, glass pots, aluminum pots, copper pots and other pots without magnetic permeability or with poor magnetic permeability, that is, the electromagnetic oven cannot heat pots without magnetic permeability or with poor magnetic permeability, and has poor applicability.

[0078] Therefore, the embodiments of the present application provide a cooking equipment, which is provided with a coil disc and a non-magnetic conductor, and the coil disc can generate an alternating magnetic field after being powered. The non-magnetic conductor is a conductor without magnetic permeability or with poor magnetic permeability, specifically, a conductor without ferromagnetic elements (iron, cobalt, nickel), such as titanium, graphite, graphene, aluminum, copper, etc. Then, when the non-magnetic conductor is located in the alternating magnetic field, the alternating magnetic field can pass through the non-magnetic conductor with small loss, and when a pot with magnetic permeability is placed on the cooking equipment, the alternating magnetic field can directly act on the pot and generate an alternating current at the bottom of the pot, so that the pot heats up. At the same time, the non-magnetic conductor has electrical conductivity, and it can also generate heat in the alternating magnetic field. In this way, the non-magnetic conductor can conduct heat to the outside, and because the non-magnetic conductor is pressed on the panel by the coil disc and is attached to the panel, heat can be transferred between the non-magnetic conductor and the panel, and the heat of the non-magnetic conductor can be conducted to the panel and then to the pot, so that different types of pots can heat up. In this way, the cooking equipment can heat both magnetic pots and non-magnetic pots, and has high applicability.

[0079] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific examples.

[0080] Please refer to Figure 1 and Figure 2 The present embodiment provides a cooking device 1 which can heat a pot and in turn heat food. The cooking device 1 can be an induction cooker, an induction stove, an embedded induction stove, etc. The present embodiment does not limit the specific form of the cooking device 1, and the following will be described by taking the cooking device 1 as an induction cooker for convenience.

[0081] In some embodiments, the cooking device 1 comprises a housing 10, the housing 10 comprising a panel 11 and a bottom shell 12, the panel 11 being used to support a pot, and the panel 11 and the bottom shell 12 enclosing a receiving cavity.

[0082] In some embodiments, the panel 11 can be a microcrystalline panel, a black crystal panel, a tempered glass panel, etc. Alternatively, the panel 11 can also be a composite panel composed of multiple panels. For example, the panel 11 is a composite panel composed of a microcrystalline panel and a stainless steel panel. In some embodiments, the thickness of the panel 11 can be 3-6 mm, and the present embodiment does not limit the type and thickness of the panel 11.

[0083] In some embodiments, the panel 11 can be a planar panel, a panel 11 recessed towards the inner side of the receiving cavity, or a panel 11 of other shapes. The present embodiment does not limit the shape of the panel 11, and the following will be described by taking the panel 11 as a planar panel 11 for convenience.

[0084] In some embodiments, the cooking device 1 further comprises a control assembly (not shown) and a coil disc 20, both of which are located in the receiving cavity. The control assembly can comprise a circuit board 90, the circuit board 90 being electrically connected with the coil disc 20, and the coil disc 20 can generate an alternating magnetic field under the control of the circuit board 90.

[0085] Thus, please refer to Figure 5 When heating food with a pot having magnetic permeability, such as an iron pot, a stainless steel pot or other magnetic permeability pot, the pot can be placed on the panel 11. After the cooking device 1 is powered on, the circuit board 90 can control the coil disc 20 to generate an alternating magnetic field. The panel 11 has no or poor magnetic permeability and is relatively thin, and the panel 11 has little influence on the conduction of the alternating magnetic field. Thus, the alternating magnetic field can pass through the panel 11 with little attenuation loss and act on the pot, so that eddy current can be generated in the pot. Since the pot has resistance, according to Joule's law, the eddy current flowing in the pot will be converted into heat energy, i.e. the pot generates induction heat, so that the pot heats up. That is, the cooking device 1 can use a pot having magnetic permeability to heat food.

[0086] In some embodiments, please refer to Figure 2 , Figure 3 and Figure 4 The cooking device 1 also includes a non-magnetic conductor 30, which is located between the coil 20 and the panel 11, and allows an alternating magnetic field to pass through it.

[0087] Understandably, components that can be passed through by an alternating magnetic field refer to those that do not generate significant heat due to eddy current effects or hysteresis losses within the alternating magnetic field. Their permeability can approach the vacuum permeability μ0 = 4π × 10⁻⁶. -7 H / m. It is understood that for components with a permeability slightly greater than that of vacuum, the material can be, for example, ferritic stainless steel, nickel-copper alloy, etc. The permeability of such components can be in the range of 1.01μ0-5μ0. Since the attenuation loss caused by the alternating magnetic field passing through such material components is small, such components can also be considered to belong to the category of "subject to magnetic field passage" described in this embodiment.

[0088] In other words, the non-magnetic conductor 30 has no magnetic permeability or poor magnetic permeability, and its influence on the conduction of the alternating magnetic field is small. Thus, when using a cookware with magnetic permeability, the alternating magnetic field can pass through the non-magnetic conductor 30 and the panel 11 with minimal attenuation loss and act on the cookware.

[0089] In some embodiments, the non-magnetic conductor 30 also exhibits electrical conductivity. According to the skin effect, when the coil disk 20 generates an alternating magnetic field, and the non-magnetic conductor 30 is situated within this field, eddy currents can be induced within the non-magnetic conductor 30. These eddy currents are alternating currents and typically accumulate near the surface of the non-magnetic conductor 30 and flow there. Since the non-magnetic conductor 30 has resistance, according to Joule's law, the eddy currents flowing within it are converted into heat energy; that is, the non-magnetic conductor 30 can generate heat induced in the alternating magnetic field.

[0090] In other words, the non-magnetic conductor 30 can generate heat in an alternating magnetic field, so that the heat of the non-magnetic conductor 30 can be conducted to its surroundings, for example, some of the heat can be conducted in a direction parallel to the panel 11.

[0091] In some embodiments, the non-magnetic conductor 30 may be disposed on the side of the panel 11 away from the coil 20, that is, the non-magnetic conductor 30 may be disposed on the wall surface of the panel 11 that supports the pot.

[0092] In this way, when using a cookware to heat food, whether it is a magnetic cookware or a non-magnetic cookware, after the cookware is placed on the panel 11, the cookware is in direct contact with the non-magnetic conductor 30. The heat on the non-magnetic conductor 30 can be directly conducted to the cookware through heat conduction, causing the cookware to heat up. The heat conduction efficiency is high.

[0093] In some embodiments, to simplify the appearance of the cooking device 1, the non-magnetic conductor 30 may also be disposed inside the accommodating cavity. The cooking device 1 includes a first elastic member 40, which may be a spring, silicone, or other component with reciprocating extension and retraction capabilities. The first elastic member 40 is located inside the accommodating cavity and connected to the housing 10. The connection between the first elastic member 40 and the housing 10 may be by snap-fit, hook-fit, abutment, etc., which is not limited in this embodiment.

[0094] In some embodiments, the first elastic element 40 can be connected to the coil 20, that is, the coil 20 can be installed in the housing 10 through the first elastic element 40. The first elastic element 40 is used to apply elastic force to the coil 20 so that the non-magnetic conductor 30 is pressed against the panel 11 by the coil 20. In this way, the non-magnetic conductor 30 can be sandwiched between the panel 11 and the coil 20, and the elasticity of the first elastic element 40 is less affected by temperature, which can avoid the coil 20 from failing under pressure due to the high operating temperature of the cooking device 1, and the fixing stability of the non-magnetic conductor 30 is high.

[0095] In some embodiments, the non-magnetic conductor 30 can also be bonded to the panel 11 with thermally conductive adhesive (not shown). This avoids separation gaps between the non-magnetic conductor 30 and the panel 11, and the larger bonding area between the non-magnetic conductor 30 and the panel 11 is beneficial to improving heat conduction efficiency.

[0096] In some embodiments, since the non-magnetic conductor 30 is in contact with the panel 11, the non-magnetic conductor 30 can directly conduct heat to the panel 11. After the panel 11 absorbs heat, its temperature rises. When food is heated using a cookware, such as a magnetic cookware or a non-magnetic cookware, the cookware is placed on the panel 11, and the heat on the panel 11 is conducted to the cookware through thermal conduction and thermal radiation, causing the cookware to heat up.

[0097] In other words, the cooking device 1 provided in this embodiment can heat cookware with magnetic properties, including but not limited to iron pots, stainless steel pots, cast iron pots, or other magnetic cookware. It can also heat cookware without magnetic properties, including but not limited to casserole, ceramic pots, glass pots, aluminum pots, and copper pots. The cooking device 1 has a wide range of applications.

[0098] Furthermore, the cooking device 1 provided in this embodiment does not require the control component to detect and identify the type of cookware. As long as the cookware is placed on the panel 11, the cooking device 1 can heat the cookware after being powered on, which simplifies the control component and the structure of the cooking device 1.

[0099] In some embodiments, when using a magnetic cookware, the heat source on the cookware can be from various sources, including heat generated by the alternating magnetic field acting directly on the cookware, heat transferred to the cookware by the panel 11 or the non-magnetic conductor 30 through heat conduction and heat radiation, etc. Compared to heating the magnetic cookware with the coil 22 alone, the cooking device 1 provided in this embodiment can enable the magnetic cookware to obtain more heat and has higher heating efficiency.

[0100] In some embodiments, the coil disk 20 includes a coil support 21 and a coil 22 disposed on the coil support 21, i.e., the coil 22 is wound around the coil support 21, and the coil support 21 is connected to the bottom shell 12 via a first elastic member 40. The coil 22 can be electrically connected to the circuit board 90 of the control component and generate an alternating magnetic field under the control of the circuit board 90.

[0101] In some embodiments, the coil 22 can be made of multi-strand aluminum wire or multi-strand copper wire. The winding shape of the coil 22 can be spiral, elliptical, polygonal, etc. The coil 22 can be wound into a single layer structure in the same plane, or it can be wound into multiple layers along the thickness direction of the panel 11. The above is an example illustration of the structure of the coil 22, and this embodiment does not limit it.

[0102] In some embodiments, the turns of the coil 22 can be wound with the same preset spacing, or the spacing can be gradually varied from the inner to the outer coil. For example, the turns of the coil 22 can be wound with a larger spacing (e.g., 1mm-5mm), so that air can flow in the gaps between the turns of the coil, which helps the coil 22 dissipate heat and cool down.

[0103] In some embodiments, the first elastic member 40 has two opposite ends. The first end of the first elastic member 40 is connected to the inner surface of the bottom shell 12. The first elastic member 40 can be connected to the bottom shell 12 by means of snap-fit, hook-fit, etc. The second end of the first elastic member 40 cooperates with the coil support 21. That is, the first elastic member 40 is connected between the bottom shell 12 and the coil support 21. The first elastic member 40 applies an elastic force to the coil support 21. The direction of the elastic force is towards the panel 11. In this way, the coil support 21 can move towards the panel 11 under the action of the elastic force until the non-magnetic conductor 30 is pressed against the panel 11 by the coil support 21. That is, the non-magnetic conductor 30 is sandwiched between the coil support 21 and the panel 11.

[0104] This avoids direct contact between the non-magnetic conductor 30 and the coil 22, thus preventing the coil 22 from directly obtaining heat from the non-magnetic conductor 30 through heat transfer. This also allows the coil 22 to obtain less heat, preventing overheating and improving its service life.

[0105] In some embodiments, the bottom shell 12 is provided with a plurality of spaced guide posts 121, and the extension direction of the plurality of guide posts 121 is towards the panel 11. For example, when the panel 11 is a flat panel 11, the guide posts 121 can all extend in a direction perpendicular to the panel 11.

[0106] In some embodiments, each guide post 121 is fitted with a corresponding first elastic element 40. This can prevent the first elastic element 40 from tilting and limit the elastic force direction of the first elastic element 40 to the extension direction of the first guide post 121. This prevents the coil disk 20 from shifting due to the tilting of the first elastic element 40, thereby causing the non-magnetic conductor 30 to shift and improving the fixing stability of the non-magnetic conductor 30 and the coil disk 20.

[0107] In some embodiments, the second end of the first elastic member 40 abuts against the surface of the coil support 21 facing the bottom shell 12. For example, the first elastic member 40 abuts against the bottom wall surface of the coil support 21 facing the bottom shell 12. That is, the coil disk 20 and the first elastic member 40 are stacked in the thickness direction of the panel 11, and the second end of the first elastic member 40 supports the lower side of the coil disk 20. The structure of the coil support 21 is relatively simple and easy to assemble.

[0108] In some embodiments, the coil support 21 may be provided with a plurality of first guide holes 211, and the guide post 121 is slidably connected to the first guide holes 211. In this way, the first guide holes 211 and the guide post 121 can be used to limit the coil disc 20, preventing displacement of the coil disc 20 along the direction parallel to the panel 11 when it moves under the elastic force of the first elastic member 40, or even the coil support 21 from detaching from the first elastic member 40. Furthermore, during the assembly of the cooking device 1, the guide post 121 can also be used to position the coil disc 20, facilitating its installation within the housing 10, resulting in higher assembly efficiency.

[0109] In some embodiments, by providing a first guide hole 211 and engaging the guide post 121 with the first guide hole 211, the position where the coil support 21 and the first elastic member 40 abut against each other can be limited to the area circumferential to the first guide hole 211, that is, the second end of the first elastic member 40 abuts against the coil support 21 in the area close to the first guide hole 211. This prevents displacement between the coil support 21 and the first elastic member 40, resulting in high stability of the pressure between the coil disc 20 and the first elastic member 40.

[0110] In some embodiments, the multiple guide posts 121 can be spaced out at any position on the inner surface of the bottom shell 12. For example, the multiple guide posts 121 can be spaced out along any straight line direction, as long as they can guide and limit the coil disk 20. This embodiment does not limit the number and arrangement of the multiple guide posts 121.

[0111] In some embodiments, a plurality of first guide holes 211 may also be spaced apart circumferentially along the coil support 21. That is, the first guide holes 211 are located at the edge of the coil support 21 and are spaced apart along the edge direction of the coil support 21. On the one hand, this can make the coil support 21 more evenly stressed, avoiding tilting due to unbalanced stress on the coil support 21, which could cause some non-magnetic conductors 30 to separate from the panel 11. On the other hand, it can make the first guide holes 211 and the coil 22 staggered, for example, the projection of the first guide hole 211 on the panel 11 and the projection of the coil 22 on the panel 11 are spaced apart, so as to avoid interference between the guide post 121 and the coil 22.

[0112] In some embodiments, please refer to Figure 6 , Figure 7 and Figure 8 The coil support 21 is provided with a winding groove 212, the opening of which faces the panel 11 and is used to accommodate the coil 22. The shape of the winding groove 212 is adapted to the winding shape of the coil 22 so as to limit the coil 22.

[0113] In some embodiments, the depth of the winding groove 212 may be greater than or equal to the thickness of the coil 22, so that the coil 22 will not extend out of the outside of the winding groove 212 through the opening of the winding groove 212, thereby protecting the coil 22.

[0114] In some embodiments, a spacer protrusion may be provided in the winding groove 212. The spacer protrusion is provided between two adjacent turns of the coil 22. In this way, the wire can be limited to prevent the wire from shifting and causing the two adjacent turns of the wire to come into contact with each other. The spacer protrusion can also cool the wire, which helps to reduce the temperature of the coil 22 and prevent the coil 22 from overheating.

[0115] In some embodiments, the coil support 21 is provided with a pressing part 213, which is located at one end of the winding groove 212 near the panel 11. In this way, when the non-magnetic conductor 30 is sandwiched between the pressing part 213 and the panel 11, the non-magnetic conductor 30 can be located between the panel 11 and the coil 22, and the non-magnetic conductor 30 is located on the outside of the winding groove 212, which can prevent the non-magnetic conductor 30 from contacting the coil 22.

[0116] In some embodiments, the pressing portion 213 extends circumferentially along the coil 22 such that the projection of the non-magnetic conductor 30 on the panel 11 at least partially overlaps with the projection of the coil 22 on the panel 11.

[0117] In the part that does not correspond to the coil 22, for example, in the direction parallel to the panel 11, a part of the non-magnetic conductor 30 extends to the outside of the coil 22. This part of the non-magnetic conductor 30 will generate less induced heat or no induced heat because less magnetic field passes through it. This makes the induced heat generated by each part of the non-magnetic conductor 30 uneven, resulting in some heat loss.

[0118] In other words, by setting the pressing part 213 and sandwiching the non-magnetic conductor 30 between the pressing part 213 and the panel 11, the non-magnetic conductor 30 and the coil 22 can be arranged opposite each other. The projection of the non-magnetic conductor 30 on the panel 11 and the projection of the coil 22 on the panel 11 overlap at least partially. This allows the alternating magnetic field to act on the non-magnetic conductor 30 as much as possible, reducing magnetic field leakage. This helps to generate more induced heat on the non-magnetic conductor 30 and improves the heating efficiency of the cooking device 1.

[0119] The projection shape of the non-magnetic conductor 30 on the panel 11 can be circular, square, or other shapes. The size of the non-magnetic conductor 30 can be less than or equal to the size of the coil 22. This embodiment does not limit the shape, size, etc. of the non-magnetic conductor 30. For example, the projection shape and size of the non-magnetic conductor 30 on the panel 11 are the same as the projection shape and size of the coil 22 on the panel 11. This can avoid uneven induced heat on the non-magnetic conductor 30 and reduce heat loss.

[0120] In some embodiments, the pressing part 213 is provided with a pressing wall 2131 and a limiting wall 2132 connected to each other. The non-magnetic conductor 30 is sandwiched between the pressing wall 2131 and the panel 11. When the coil 20 presses the non-magnetic conductor 30 against the panel 11, the non-magnetic conductor 30 can press against the pressing wall 2131. The limiting wall 2132 is connected to the pressing wall 2131, and the pressing wall 2131 and the limiting wall 2132 are set at an angle, for example, the angle can be 50º-120º. The limiting wall 2132 surrounds the circumferential outer side of the non-magnetic conductor 30 and extends towards one side of the panel 11. In this way, the limiting wall 2132 can limit the non-magnetic conductor 30 to prevent the non-magnetic conductor 30 from shifting in a direction parallel to the panel 11.

[0121] Understandably, the thickness of the non-magnetic conductor 30 is greater than the extension dimension of the limiting wall 2132 along the thickness direction of the panel 11. In this way, when the non-magnetic conductor 30 presses against the pressing wall 2131, the panel 11 and the pressing part 213 are spaced apart to avoid collision and interference between the coil support 21 and the panel 11.

[0122] In some embodiments, the distance between the pressing wall surface 2131 and the bottom wall surface of the winding groove 212 is greater than the thickness of the coil 22. Thus, when the coil disc 20 presses the non-magnetic conductor 30 against the panel 11, the non-magnetic conductor 30 and the coil 22 are spaced apart, preventing them from contacting each other and causing the coil 22 to overheat. Furthermore, the spaced arrangement between the non-magnetic conductor 30 and the coil 22 allows for airflow between them, which helps cool the coil 22 and promotes heat dissipation.

[0123] In some embodiments, the distance between the pressing wall 2131 and the bottom wall of the winding groove 212 can be greater than the depth of the winding groove 212. Thus, when the non-magnetic conductor 30 presses against the pressing wall 2131, the gap between the non-magnetic conductor 30 and the coil 22 consists of two parts: one is the distance between the non-magnetic conductor 30 and the opening of the winding groove 212, and the other is the difference between the depth of the winding groove 212 and the thickness of the coil 22. In other words, a larger gap can exist between the non-magnetic conductor 30 and the coil 22, which helps the coil 22 dissipate heat and cool down.

[0124] In some embodiments, there are multiple pressing portions 213, which are spaced apart along the circumference of the coil 22. In this way, when the non-magnetic conductor 30 is sandwiched between the coil disk 20 and the panel 11, the multiple pressing portions 213 can simultaneously press against the non-magnetic conductor 30, resulting in higher stability of the non-magnetic conductor 30.

[0125] In some embodiments, the cooking device 1 further includes a temperature measuring element 50, which can be a thermocouple sensor, a platinum resistance sensor, or the like, and is applicable to a higher temperature range. The cooking device 1 also includes a second elastic element 60, which can be a spring, a silicone element, or other component with reciprocating extension and retraction capabilities.

[0126] In some embodiments, the coil bracket 21 is provided with a second guide hole 214, which extends toward the panel 11. The temperature measuring element 50 extends into the second guide hole 214 and is slidably connected to the second guide hole 214. In this way, the temperature measuring element 50 can be installed in the second guide hole 214 of the coil bracket 21.

[0127] In some embodiments, the second guide hole 214 can be located at any position on the coil support 21, as long as it does not interfere with the coil 22.

[0128] Considering that the temperature is usually higher at the position on the panel 11 corresponding to the middle of the coil 22, the second guide hole 214 can be set in the middle of the coil bracket 21. In this way, the temperature measuring element 50 is installed on the second guide hole 214, and the temperature measuring element 50 can be opposite to the area with higher temperature.

[0129] Furthermore, the second guide hole 214 can be used to connect with the temperature measuring element 50 to limit the temperature measuring element 50, preventing it from tilting or shifting, which could cause the temperature measuring element 50 to separate from the part to be tested or shift to other areas, thus improving the temperature measurement accuracy of the temperature measuring element 50.

[0130] In some embodiments, one end of the second elastic member 60 is connected to the coil support 21, for example, by means of adhesion, snap-fit, hook-fit, etc., and the other end of the second elastic member 60 is connected to the temperature measuring member 50, for example, by means of adhesion, snap-fit, hook-fit, etc. The second elastic member 60 is used to apply elastic force to the temperature measuring member 50 so that the temperature measuring member 50 abuts against the panel 11 or the non-magnetic conductor 30. The elastic force of the second elastic member 60 is directed towards the side of the panel 11. In this way, the temperature measuring member 50 can abut against the panel 11 or the non-magnetic conductor 30 through the elastic force of the second elastic member 60, so as to avoid the second elastic member 60 separating from the panel 11 or the non-magnetic conductor 30 to be tested, thus achieving high stability.

[0131] In some embodiments, when the temperature measuring element 50 abuts against the panel 11, the non-magnetic conductor 30 may be provided with a through hole for the temperature measuring element 50 to pass through.

[0132] In some embodiments, the temperature measuring element 50 is provided with a first limiting part 51, which protrudes from the outer wall surface of the temperature measuring element 50. The first limiting part 51 can be integrally formed with the temperature measuring element 50, or it can be fixed to the temperature measuring element 50 by means of bonding, snap-fitting, etc. For example, the first limiting part 51 can be a protrusion or screw fixed to the temperature measuring element 50.

[0133] In some embodiments, the first limiting part 51 and the panel 11 are located at opposite ends of the second guide hole 214. Taking the second guide hole 214 penetrating the coil support 21 as an example, the first limiting part 51 is located on the side of the coil support 21 facing away from the panel 11. In this way, by providing the first limiting part 51, for example during the assembly of the cooking device 1, the temperature measuring element 50 can be prevented from dislodging from the second guide hole 214 and separating from the coil support 21 under the elastic force of the second elastic element 60.

[0134] In some embodiments, to simplify the assembly of the cooking device 1, the two ends of the second elastic member 60 can also abut against the temperature measuring member 50 and the coil support 21, respectively. For example, the temperature measuring member 50 is further provided with a protruding second limiting portion 52, with the first limiting portion 51 and the second limiting portion 52 spaced apart, and the second elastic member 60 located between the first limiting portion 51 and the second limiting portion 52. Thus, when the temperature measuring member 50 is inserted into the second guide hole 214, the first limiting portion 51 can be located on the side of the coil support 21 facing away from the panel 11, and the second limiting portion 52 and the second elastic member 60 can be located on the side of the coil support 21 closer to the panel 11.

[0135] In some embodiments, the first limiting portion 51 extends circumferentially along the temperature measuring element 50 and covers a portion of the outer wall surface of the temperature measuring element 50. That is, along the circumferential direction of the temperature measuring element 50, the first limiting portion 51 does not completely cover the circumferential wall surface of the temperature measuring element 50, and a portion of the wall surface of the temperature measuring element 50 is still exposed. For example, there are two first limiting portions 51, which are spaced apart along the circumferential direction of the temperature measuring element 50.

[0136] In some embodiments, the second guide hole 214 has a first hole portion 2141 and a second hole portion 2142 that are connected. The first hole portion 2141 is used to insert and cooperate with the temperature measuring element 50, that is, the first hole portion 2141 is inserted and cooperates with the temperature measuring element 50 and limits the temperature measuring element 50. The shape and size of the second hole portion 2142 can be equivalent to the shape and size of the first limiting portion 51. In this way, after the first limiting portion 51 rotates about the axis of the first hole portion 2141 and is opposite to the second hole portion 2142, it can be disengaged through the second guide hole 214 under the elastic force of the second elastic member 60. That is to say, by providing the first limiting portion 51 and the second hole portion 2142, the temperature measuring element 50 can be detachably installed on the coil bracket 21, and the disassembly and assembly are relatively simple.

[0137] Taking the assembly of the temperature measuring element 50 onto the coil bracket 21 as an example, when the first limiting part 51 and the second hole part 2142 are offset from each other in the circumferential direction of the first hole part 2141, the first limiting part 51 of the temperature measuring element 50 can abut against the coil bracket 21 under the elastic force of the second elastic member 60, so as to prevent the temperature measuring element 50 from separating from the coil bracket 21.

[0138] Understandably, when the panel 11 is assembled, the panel 11 or the non-magnetic conductor 30 comes into contact with the temperature measuring element 50. Under the low pressure of the panel 11, the temperature measuring element 50 can resist the elastic force of the second elastic element 60 and move toward the side closer to the bottom shell 12. At this time, the first limiting part 51 and the coil support 21 can separate from each other.

[0139] In some embodiments, the circumferential extension dimension of the first hole 2141 may vary depending on the number of pressing parts 213 and their circumferential extension dimension. For example, when one pressing part 213 is provided, the circumferential extension angle of the pressing part 213 may be less than 180º to avoid the first hole 2141 failing to effectively limit the temperature measuring element 50. When there are multiple pressing parts 213 (e.g., more than three), the first hole 2141 can provide multi-point support and limitation for the temperature measuring element 50, and in this case, the circumferential extension angle of the pressing part 213 may be greater than 180º.

[0140] In some embodiments, the opening size of the second hole 2142 may be larger than the size of the first pressing part 213, as long as the first pressing part 213 can extend into the second hole 2142. This embodiment does not limit the shape and size of the second hole 2142.

[0141] In some embodiments, please refer to Figure 11 A limiting groove 111 is provided on the inner wall surface of the panel 11 facing the coil 20. The opening of the limiting groove 111 faces the coil 20, and the depth of the limiting groove 111 is less than the thickness of the panel 11. The non-magnetic conductor 30 is located in the limiting groove 111. In this way, when the cooking device 1 is transported or when the cooking device 1 is subjected to collision or impact, the side wall surface of the limiting groove 111 is configured to limit the non-magnetic conductor 30. That is, the non-magnetic conductor 30 can be prevented from shifting in a direction parallel to the panel 11 by the side wall surface of the limiting groove 111. The fixing stability of the non-magnetic conductor 30 is high.

[0142] In some embodiments, the non-magnetic conductor 30 may contact the side wall of the limiting groove 111, or the size of the limiting groove 111 may be larger than the size of the non-magnetic conductor 30 to facilitate installation. This embodiment does not impose any limitations.

[0143] In some embodiments, please refer to Figure 11The panel 11 can be a composite board. For example, the panel 11 includes a support portion 112 and a connecting portion 113. The support portion 112 can be a microcrystalline panel for supporting cookware, and the connecting portion 113 can be a tempered glass plate, stainless steel plate, etc. The connecting portion 113 is connected to the bottom shell 12. A through hole can be provided on the connecting portion 113. The support portion 112 is located on the side of the connecting portion 113 away from the coil 20 and covers the through hole to form a limiting groove 111.

[0144] The following examples illustrate the materials of the non-magnetic conductor 30, and do not constitute a limitation on the materials of the non-magnetic conductor 30, as long as they are conductive and not magnetic or have poor magnetic permeability.

[0145] In some embodiments, the non-magnetic conductor 30 can be made of metal, such as titanium (Ti), aluminum (Al), copper (Cu), silver (Ag), gold (Au), zinc (Zn), tin (Sn), copper-zinc alloy, copper-tin alloy, etc. In some embodiments, the non-magnetic conductor 30 can be made of polymer material, which can be a composite polymer material with added conductive filler. The conductive filler can be a carbon-based filler, such as graphite-filled polyethylene, carbon nanotube-reinforced epoxy resin, conductive carbon black-modified polyurethane, etc. The conductive filler can also be a metal oxide filler, such as indium tin oxide powder-filled silicone rubber, aluminum-doped zinc oxide particle-modified polypropylene.

[0146] In some embodiments, the material of the non-magnetic conductor 30 can be a semiconductor material, such as gallium arsenide (GaAs), silicon carbide (SiC), gallium nitride (GaN), or other compound semiconductors.

[0147] In some embodiments, the material of the non-magnetic conductor 30 may also be graphite, graphene, etc.

[0148] In some embodiments, the non-magnetic conductor 30 is a graphite element, which has good electrical conductivity and low magnetic permeability, and can generate heat in an alternating magnetic field and conduct heat to the panel 11.

[0149] In some embodiments, when the material of the non-magnetic conductor 30 is graphite, the graphite can undergo an anti-oxidation treatment. The anti-oxidation treatment method may include setting an anti-oxidation coating (e.g., silicon carbide coating, boron nitride coating) on ​​the graphite surface, impregnating the graphite (the impregnating agent may be phosphoric acid, boric acid, sodium silicate solution, or molten borax, phosphate), or forming an oxide film on the graphite surface by oxidation. This embodiment does not limit the anti-oxidation treatment method of graphite.

[0150] In some embodiments, the thickness of the non-magnetic conductor 30 satisfies the following relationship:

[0151] ,

[0152] ,

[0153] Where H is the thickness of the non-magnetic conductor (mm), δ is the skin depth (mm), ω is the angular frequency of the alternating magnetic field (rad / s), σ is the conductivity of the non-magnetic conductor (S / m), and μ is the permeability of the non-magnetic conductor (H / m).

[0154] The skin depth refers to the depth at which the current density drops to 1 / e (approximately 36.8%) of the surface area. It can be understood as the degree of concentration of eddy currents at the surface of the non-magnetic conductor 30. A smaller skin depth indicates that the eddy currents are more concentrated on the surface of the non-magnetic conductor 30. In other words, the eddy currents generated within the non-magnetic conductor 30 are mainly concentrated near its surface, and there is almost no current inside the non-magnetic conductor 30.

[0155] Therefore, when the thickness of the non-magnetic conductor 30 is too large, for example, much larger than its skin depth, the portion of the non-magnetic conductor 30 exceeding its skin depth generates fewer eddy currents and correspondingly less induced heat. Simultaneously, it absorbs the induced heat generated on the surface of the non-magnetic conductor 30, leading to heat loss. Furthermore, it increases the conduction path length of the alternating magnetic field, increasing the attenuation loss of the alternating magnetic field.

[0156] By limiting the thickness of the non-magnetic conductor 30 to less than 3 times the skin depth, the non-magnetic conductor 30 can be easily processed and shaped, and the heat loss of the non-magnetic conductor 30 and the attenuation loss of the alternating magnetic field can be reduced.

[0157] According to the above calculation formula, the skin depth of the non-magnetic conductor 30 is related to its permeability, conductivity and the frequency of the alternating magnetic field, and the higher the frequency of the alternating magnetic field, the smaller the skin depth of the non-magnetic conductor 30.

[0158] In some embodiments, taking graphite as an example, the material of the non-magnetic conductor 30 is approximately equal to the vacuum permeability μ = 4π × 10⁻⁶. -7 H / m ≈ 1.2566 × 10 -6 H / m, when its conductivity σ is 100000S / m, and it is set at a frequency of 25000Hz (corresponding to angular frequency) When the graphite is placed in an alternating magnetic field, substituting the above calculation formula, its skin depth δ is approximately 10.1 mm. Therefore, the thickness of the graphite can be set to less than 30 mm; for example, the thickness of the non-magnetic conductor 30 can be 0.5 mm to 20 mm. This avoids both insufficient induced heat generation due to excessively thin graphite, which would prevent effective heating of the cookware, and excessive heat loss due to excessively thick graphite.

[0159] In other words, by limiting the thickness of the non-magnetic conductor 30 to less than three times the skin depth, when the non-magnetic conductor 30 is located in an alternating magnetic field, a portion of the alternating magnetic field can pass through the non-magnetic conductor with minimal loss, thus acting on the magnetic cookware. A portion of the alternating magnetic field can induce heat in the non-magnetic conductor 30, and the heat generated by the non-magnetic conductor 30 can be conducted to one side of the cookware and heat it.

[0160] It should be noted that the numerical values ​​and ranges involved in the embodiments of this application are approximate values. Due to the influence of the manufacturing process, there may be a certain range of errors, which can be considered negligible by those skilled in the art.

[0161] In some embodiments, considering that the temperature of the non-magnetic conductor 30 is high when it is heated, for example, the temperature of the non-magnetic conductor 30 can reach 600°C-700°C, the cooking device 1 also includes a heat insulation component 70. The material of the heat insulation component 70 can be silicon dioxide, glass fiber, aerogel, etc., which has high thermal resistance and low thermal conductivity.

[0162] In some embodiments, the heat insulation member 70 is disposed on the coil disk 20 and sandwiched between the non-magnetic conductor member 30 and the coil disk 20.

[0163] In this way, in the thickness direction of panel 11, the non-magnetic conductor 30 and coil 22 can be physically isolated by the heat insulation component 70, avoiding direct heat conduction between the non-magnetic conductor 30 and coil 22, reducing the heat conducted between the non-magnetic conductor 30 and coil 22 by thermal radiation, and the heat transfer path between the non-magnetic conductor 30 and coil 22 through air needs to bypass the heat insulation component 70, which makes the heat transfer path longer.

[0164] In this way, even if the heat insulation component 70 can absorb some of the heat conducted by the non-magnetic conductor 30 and generate heat, the amount of heat directly obtained by the coil 22 from the heat insulation component 70 will be reduced. Furthermore, due to the longer path length for heat transfer between the non-magnetic conductor 30 and the coil 22 via the air, the amount of heat obtained by the coil 22 from the air will also be reduced. This prevents the coil 22 from overheating and generating high temperatures, improves the lifespan of the coil 22, and reduces heat loss from the non-magnetic conductor 30 towards the side away from the panel 11, allowing more heat to be conducted to the side of the panel 11.

[0165] In some embodiments, the heat insulation component 70 may be mounted on the coil support 21, for example by adhesive, snap-fit ​​or other means. This embodiment does not limit the mounting form of the heat insulation component 70.

[0166] In some embodiments, the heat insulation member 70 may be disposed on the pressing portion 213, and the limiting wall surface 2132 of the pressing portion 213 surrounds the outer circumferential direction of the heat insulation member 70 to prevent the heat insulation member 70 from shifting in a direction parallel to the panel 11. In this way, both the non-magnetic conductor 30 and the heat insulation member 70 can be clamped between the panel 11 and the coil support 21 by the elastic force of the first elastic member 40.

[0167] In some embodiments, by providing the heat insulation member 70, when the non-magnetic conductor 30 separates from the panel 11, for example, when the middle part of the non-magnetic conductor 30 deforms and separates from the panel 11, the non-magnetic conductor 30 needs to drive the heat insulation member 70 to deform simultaneously. In other words, the difficulty of separating the non-magnetic conductor 30 from the panel 11 increases, reducing the possibility of the non-magnetic conductor 30 separating from the panel 11, and the adhesion between the non-magnetic conductor 30 and the panel 11 is relatively high.

[0168] In some embodiments, when the panel 11 is provided with a limiting groove 111, the heat insulation member 70 can partially extend into the limiting groove 111 and simultaneously limit the non-magnetic conductor 30 and the heat insulation member 70 through the limiting groove 111.

[0169] In some embodiments, the heat insulation member 70 is provided with a receiving groove 71, the opening of the receiving groove 71 facing the panel 11, that is, the wall surface of the heat insulation member 70 facing the panel 11 is recessed towards the side away from the panel 11, and the non-magnetic conductor 30 is disposed in the receiving groove 71.

[0170] In some embodiments, the size of the receiving groove 71 may be larger than the size of the non-magnetic conductor 30 to facilitate the installation of the non-magnetic conductor 30 within the receiving groove 71. Alternatively, the size of the receiving groove 71 may be comparable to the size of the non-magnetic conductor 30, so that when the non-magnetic conductor 30 is installed within the receiving groove 71, the sidewall of the non-magnetic conductor 30 can contact the sidewall of the receiving groove 71 to provide a snap-fit ​​and limit the non-magnetic conductor 30, preventing the non-magnetic conductor 30 from shifting in a direction parallel to the panel 11.

[0171] In some embodiments, when the non-magnetic conductor 30 is attached to the panel 11, the heat insulation member 70 can also be attached to the panel 11. In this way, the panel 11 can cover the opening of the receiving groove 71, which can reduce heat loss from the non-magnetic conductor 30 through the air. It is understood that when the thickness of the non-magnetic conductor 30 is greater than the depth of the receiving groove 71, the heat insulation member 70 may not need to be in contact with the panel 11.

[0172] By placing the non-magnetic conductor 30 within the receiving groove 71, the stacking thickness of the non-magnetic conductor 30, the heat insulation member 70, and the coil 22 in the thickness direction of the panel 11 is reduced, which helps to reduce the size of the cooking device 1. Furthermore, since the sidewall of the receiving groove 71 surrounds the circumferentially outer side of the non-magnetic conductor 30, heat loss from the non-magnetic conductor 30 in the direction parallel to the panel 11 can also be reduced, and more heat can be conducted towards one side of the panel 11 through the guidance of the sidewall of the receiving groove 71.

[0173] In some embodiments, when the non-magnetic conductor 30 is disposed in the receiving groove 71 and both the non-magnetic conductor 30 and the heat insulation component 70 are in contact with the panel 11, the non-magnetic conductor 30 and the heat insulation component 70 can be pressed against the panel 11 by the pressing wall surface 2131 of the coil bracket 21. In this way, the assembly method of the non-magnetic conductor 30 and the heat insulation component 70 is relatively simple, and the fixing method of the non-magnetic conductor 30 and the heat insulation component 70 is not affected by the temperature inside the cooking device 1, and the reliability is high.

[0174] In some embodiments, when the heat insulation member 70 presses against the pressure wall surface 2131, a heat insulation gap may be present between the heat insulation member 70 and the coil 22. That is, the heat insulation member 70 and the coil 22 are spaced apart, and there is no direct physical contact between the heat insulation member 70 and the coil 22. In this way, on the one hand, direct heat conduction between the heat insulation member 70 and the coil 22 can be avoided, which would cause the temperature of the coil 22 to rise. On the other hand, the increased contact area between the heat insulation member 70 and the air, and between the coil 22 and the air, allows for airflow within the heat insulation gap to cool down the heat insulation member 70 and the coil 22, thus helping to reduce their temperatures.

[0175] Understandably, if the distance between the coil 22 and the non-magnetic conductor 30 is too small, the temperature of the coil 22 may be too high. If the distance between the coil 22 and the non-magnetic conductor 30 is too large, the strength of the alternating magnetic field at the location of the non-magnetic conductor 30 and the location of the cookware may be too low, resulting in smaller eddy currents generated on the non-magnetic conductor 30 and the cookware, and a decrease in the thermal efficiency of the cooking device 1.

[0176] Therefore, the distance between the coil 22 and the non-magnetic conductor 30 can be set within a suitable range, so that the cooking device 1 can have high heating efficiency without overheating the coil 22. For example, the distance between the coil 22 and the non-magnetic conductor 30 can be 2mm-25mm, wherein the thickness of the heat insulation member 70 can be 3mm-15mm, and the size of the heat insulation gap can be 0.5mm-5mm.

[0177] The above are examples illustrating the spacing between coil 22 and non-magnetic conductor 30, the thickness of heat insulation component 70, and the heat insulation gap. They do not constitute a limitation on the spacing between coil 22 and non-magnetic conductor 30, the thickness of heat insulation component 70, and the heat insulation gap.

[0178] In some embodiments, the coil disk 20 is provided with a magnetic element 23, such as a ferrite magnetic element, and is located on the side of the coil 22 away from the panel 11. That is, the panel 11 and the magnetic element 23 are located on opposite sides of the coil 22.

[0179] In some embodiments, an insulating structure (not shown) is provided between the magnetic element 23 and the coil 22, such as an insulating pad or an insulating coating on the surface of the magnetic element 23, to prevent electric sparks from occurring between the magnetic element 23 and the coil 22 and to prevent the coil 22 from being broken down. This embodiment does not limit the insulating structure between the magnetic element 23 and the coil 22.

[0180] Understandably, coil 22 can generate an alternating magnetic field along the thickness direction of panel 11 and diffuse it in the surrounding area. Magnetic component 23 is magnetically conductive, and a magnetic channel can be formed within magnetic component 23 to change the direction of the alternating magnetic field, guiding it to the position of panel 11. On the one hand, this helps the cookware to heat up more quickly, increasing the heating speed of the cookware; on the other hand, it can reduce magnetic leakage of the alternating magnetic field in other directions (the bottom of cooking device 1 and the circumferential sides of cooking device 1), protecting the safety of the user and control components.

[0181] Understandably, the shape of the magnetic element 23 varies depending on the shape of the coil 22. For example, the coil 22 may be a planar coil, a concave coil recessed towards the side away from the panel 11, etc. The magnetic element 23 may include multiple magnetic strips, with the multiple magnetic strips spaced apart circumferentially along the coil 22. The above are illustrative examples of the coil 22 and the magnetic element 23, and do not constitute a limitation on the coil 22 and the magnetic element 23.

[0182] In some embodiments, the first end of the magnetic element 23 is bent and extends toward one side of the panel 11 and surrounds the outer side of the coil 22 circumferentially.

[0183] In other words, the magnetic component 23 can have an approximately L-shaped multi-segment structure, including a body portion 231 and a first bent segment 232. The body portion 231 is located on the side of the coil 22 away from the panel 11, and the extension direction of the body portion 231 can be parallel to or at an angle to the panel 11. The first bent segment 232 is at an angle to the body portion 231 and extends toward the panel 11. For example, the extension direction of the first bent segment 232 is perpendicular to the panel 11, and the end of the first bent segment 232 away from the body portion 231 constitutes the first end of the magnetic component 23.

[0184] By setting the main body 231, the alternating magnetic field can be guided to conduct along the extension direction of the main body 231, thereby reducing magnetic leakage of the alternating magnetic field at the bottom of the cooking device 1.

[0185] By setting the first bending section 232, the alternating magnetic field can be guided to conduct in the direction toward or away from the panel 11 and concentrated on the cookware and non-magnetic conductor 30, reducing the magnetic leakage of the alternating magnetic field in the circumference of the cooking device 1, which helps the cookware and non-magnetic conductor 30 to be heated evenly.

[0186] In some embodiments, the gap between the first end of the magnetic element 23 and the panel 11 is less than or equal to the thickness of the non-magnetic conductor 30. For example, the first end of the magnetic element 23 may be attached to the panel 11.

[0187] In other words, in the direction parallel to the panel 11, the first bending segment 232 is located on the outer side of the heat insulation member 70 and the non-magnetic conductor 30 in the circumferential direction. The first bending segment 232 surrounds the outer side of the heat insulation member 70 and the non-magnetic conductor 30. In this way, the alternating magnetic field can be concentrated on the non-magnetic conductor 30, which helps to make the induced heat generated in each part of the non-magnetic conductor 30 more uniform, and also allows the alternating magnetic field to be concentrated on the cookware.

[0188] In some embodiments, the coil 22 is ring-shaped, that is, the middle part of the coil 22 is not wound, and the second end of the magnetic element 23 is bent and extended toward one side of the panel 11. The second end of the magnetic element 23 extends into the middle part of the coil 22 so that the coil 22 is wrapped around the outside of the second end of the magnetic element 23.

[0189] Thus, the magnetic component 23 has an approximately U-shaped multi-segment structure. The magnetic component 23 also includes a second bent segment 233. The first bent segment 232 and the second bent segment 233 are respectively connected to both ends of the main body 231. The second bent segment 233 is angled to the main body 231 and extends towards the panel 11. For example, the extension direction of the second bent segment 233 is perpendicular to the panel 11. The end of the second bent segment 233 away from the main body 231 constitutes the second end of the magnetic component 23. The coil 22 is located within the area enclosed by the main body 231, the first bent segment 232, and the second bent segment 233.

[0190] By setting the second bending section 233, the alternating magnetic field can be guided to conduct in the direction toward or away from the panel 11, and act more concentratedly on the cookware and non-magnetic conductor 30, reducing the magnetic leakage of the alternating magnetic field in the circumference of the cooking device 1, which helps the cookware and non-magnetic conductor 30 to be heated evenly.

[0191] In other words, by setting an approximately U-shaped magnetic component 23, a conduction path with low attenuation loss can be provided for the alternating magnetic field, so that the alternating magnetic field can act on the cookware and the non-magnetic conductor 30 with more energy, thereby improving the heating efficiency of the cooking device 1.

[0192] Regarding the structure of the magnetic element 23, the magnetic element 23 can be a sheet-like structure (not shown), and the magnetic element 23 is recessed on the side facing the panel 11 to form an annular groove for accommodating the coil 22. The magnetic element 23 can also be strip-shaped and spaced apart circumferentially along the coil 22 to reduce cost. Alternatively, when the magnetic element 23 is strip-shaped, each magnetic element 23 can be an approximately U-shaped magnetic strip. Alternatively, the approximately U-shaped magnetic element 23 can also be formed by splicing two approximately L-shaped magnetic strips together (e.g., Figure 2 (As shown).

[0193] The above are examples illustrating the shape and quantity of the magnetic component 23. This embodiment does not limit the shape and quantity of the magnetic component 23. For example, the magnetic component 23 can also be composed of a combination of approximately U-shaped magnetic strips and approximately L-shaped magnetic strips.

[0194] The extension positions of the first and second ends of the magnetic component 23 can be defined by the extension lengths of the first bent segment 232 and the second bent segment 233. The extension lengths of the first bent segment 232 and the second bent segment 233 can be the same. For example, when the first bent segment 232 is in contact with the panel 11, the second bent segment 233 can pass through the heat insulation component 70 and the non-magnetic conductor 30 in sequence and be in contact with the panel 11. The extension lengths of the first bent segment 232 and the second bent segment 233 can also be different. For example, the second bent segment 233 can extend through the middle of the coil 22 to the position of the heat insulation component 70, and the length of the first bent segment 232 can be greater than the length of the second bent segment 233.

[0195] In some embodiments, please refer to Figure 9 and Figure 10The cooking device 1 also includes a cooling fan 80, which is electrically connected to the control components. A guide protrusion 122 is provided on the bottom shell 12. The guide protrusion 122 is annular and protrudes towards the coil 22. The air inlet of the guide protrusion 122 is opposite to the air outlet of the cooling fan 80. When the cooling fan 80 starts, it drives airflow, allowing air to enter the area enclosed by the guide protrusion 122 along the air inlet. The air then turns at the wall of the guide protrusion 122 and flows towards the coil 20 through the air outlet. The area of ​​the air outlet of the guide protrusion 122 can be smaller than the projected area of ​​the coil 20 on the panel 11. In this way, a larger portion of the air can directly enter the interior of the coil 20, exchanging heat and cooling the coil 20, and is discharged through the heat insulation gap between the coil 22 and the heat insulation component 70. A smaller portion of the air can diffuse along the bottom wall of the coil 20, resulting in good heat dissipation.

[0196] Understandably, the bottom casing 12 is also equipped with an air duct corresponding to the control components, and the inlet of this air duct is opposite to the outlet of the cooling fan 80. In this way, when the cooling fan 80 starts, it drives the airflow, and the air can enter the air duct to cool the control components.

[0197] In some embodiments, the area of ​​the air outlet of the air guide protrusion 122 can be greater than half the projected area of ​​the coil 20 on the panel 11. For example, when both the air guide protrusion 122 and the coil 22 are circular, with a radius of r for the air guide protrusion 122 and a radius of R for the coil 22, the radius r of the air guide protrusion 122 can be between 0.5R and... The selection can be made within a certain range, but this embodiment does not impose any limitations.

[0198] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0199] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0200] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cooking device, characterized in that, include: A housing, the housing comprising a front panel and a bottom shell, the front panel and the bottom shell forming an accommodating cavity; A coil disk located within a accommodating cavity, the coil disk being used to generate an alternating magnetic field; A non-magnetic conductor is located between the coil disk and the panel, the non-magnetic conductor is allowed to pass through the alternating magnetic field, and the non-magnetic conductor is configured to generate heat in the alternating magnetic field; And a first elastic element, which is located in the accommodating cavity and connected to the coil disk. The first elastic element is used to apply elastic force to the coil disk so that the non-magnetic conductor is pressed against the panel by the coil disk.

2. The cooking apparatus according to claim 1, characterized in that, The coil disc includes a coil support and a coil disposed on the coil support. The first end of the first elastic member is connected to the inner surface of the bottom shell, and the second end of the first elastic member cooperates with the coil support to apply elastic force to the coil support so that the non-magnetic conductor is pressed against the panel by the coil support.

3. The cooking apparatus according to claim 2, characterized in that, The bottom shell is provided with a plurality of spaced guide posts, the extension direction of the plurality of guide posts is towards the panel, and each guide post is correspondingly fitted with the first elastic member, the second end of the first elastic member abutting against the side of the coil bracket facing the bottom shell.

4. The cooking apparatus according to claim 3, characterized in that, The coil support is provided with a plurality of first guide holes, and the guide post is slidably connected to the first guide hole. The second end of the first elastic member abuts against the coil support and is located in the area near the first guide hole.

5. The cooking apparatus according to claim 4, characterized in that, Multiple first guide holes are spaced apart circumferentially along the coil support.

6. The cooking apparatus according to any one of claims 2-5, characterized in that, The coil support is provided with a winding groove and a pressing part. The opening of the winding groove faces the panel and is used to accommodate the coil. The pressing part is located at one end of the winding groove near the panel. The non-magnetic conductor is sandwiched between the pressing part and the panel. The pressing portion extends circumferentially along the coil so that the projection of the non-magnetic conductor on the panel at least partially overlaps with the projection of the coil on the panel.

7. The cooking apparatus according to claim 6, characterized in that, The pressing part is provided with a pressing wall surface and a limiting wall surface connected to each other, and the pressing wall surface and the limiting wall surface are arranged at an angle; The non-magnetic conductor is sandwiched between the pressing wall and the panel, and the limiting wall surrounds the circumferential outside of the non-magnetic conductor and extends toward one side of the panel. The distance between the pressure wall and the bottom wall of the winding groove is greater than the thickness of the coil.

8. The cooking apparatus according to claim 6, characterized in that, The pressing part is a plurality of parts, and the plurality of pressing parts are arranged at intervals along the circumference of the coil.

9. The cooking apparatus according to any one of claims 2-5, characterized in that, The cooking equipment also includes a temperature measuring element and a second elastic element; The coil support is provided with a second guide hole, which extends toward the panel side. The temperature measuring element extends into the second guide hole and is slidably connected to the second guide hole. One end of the second elastic element is connected to the coil bracket, and the other end is connected to the temperature measuring element. The second elastic element is used to apply elastic force to the temperature measuring element so that the temperature measuring element abuts against the panel or the non-magnetic conductor.

10. The cooking apparatus according to claim 9, characterized in that, The temperature measuring element is provided with a first limiting part, which protrudes from the outer wall surface of the temperature measuring element. The first limiting part and the panel are respectively located at both ends of the second guide hole.

11. The cooking apparatus according to claim 10, characterized in that, The first limiting portion extends circumferentially along the temperature measuring element and covers part of the outer wall surface of the temperature measuring element; The second guide hole has a first hole portion and a second hole portion that are connected to each other, and the first hole portion is used for insertion and mating with the temperature measuring element; The first limiting part is configured to rotate around the axis of the first hole and be opposite to the second hole, and can be disengaged through the second guide hole under the elastic force of the second elastic member.

12. The cooking apparatus according to any one of claims 1-5, characterized in that, The panel has a limiting groove on the inner wall facing the coil disk. The non-magnetic conductor is located in the limiting groove, and the side wall of the limiting groove is configured to limit the non-magnetic conductor.

13. The cooking apparatus according to any one of claims 1-5, characterized in that, The thickness of the non-magnetic conductor satisfies the following relationship: ， ， Where H is the thickness of the non-magnetic conductor (mm), δ is the skin depth (mm), ω is the angular frequency of the alternating magnetic field (rad / s), σ is the conductivity of the non-magnetic conductor (S / m), and μ is the permeability of the non-magnetic conductor (H / m).

14. The cooking apparatus according to any one of claims 1-5, characterized in that, The material of the non-magnetic conductor is at least one of titanium, graphite, graphene, aluminum, and copper.

15. The cooking apparatus according to claim 14, characterized in that, The non-magnetic conductor is made of graphite and has a thickness of 0.5mm-20mm.

16. The cooking apparatus according to any one of claims 1-5, characterized in that, The cooking device also includes a heat insulation component, which is disposed on the coil and sandwiched between the non-magnetic conductor and the coil.

17. The cooking apparatus according to claim 16, characterized in that, The heat insulation component is provided with a receiving groove, and the non-magnetic conductor is disposed in the receiving groove.

18. The cooking apparatus according to any one of claims 2-5, characterized in that, The coil disk is provided with a magnetic element, which is located on the side of the coil away from the panel; The first end of the magnetic element is bent and extends toward one side of the panel and surrounds the outside of the coil, and the gap between the first end of the magnetic element and the panel is less than or equal to the thickness of the non-magnetic conductor.

19. The cooking apparatus according to claim 18, characterized in that, The coil is ring-shaped; The second end of the magnetic element is bent and extends toward one side of the panel, and the coil is wrapped around the outside of the second end of the magnetic element.

20. The cooking apparatus according to any one of claims 1-5, characterized in that, The cooking device also includes a cooling fan, and the bottom shell is provided with an air guide protrusion. The air guide protrusion is annular and protrudes towards the coil side. The air inlet of the air guide protrusion is opposite to the air outlet of the cooling fan. The area of ​​the air outlet of the air guide protrusion is smaller than the projected area of ​​the coil on the panel.

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