Electromagnetic induction heating cooking equipment

Abstract

The utility model relates to the technical field of kitchen appliances, in particular to electromagnetic induction heating cooking equipment which comprises an upper shell and a lower shell, a pot assembly is arranged in the lower shell, and a first fan blade, an annular magnetic conduction assembly located on the periphery of the first fan blade and a driving motor driving the first fan blade to rotate are further arranged in the upper shell. The height ratio of the first fan blade to the annular magnetic conductive assembly is 1: 1-1: 1.5; an electromagnetic induction coil matched with the annular magnetic conductive assembly is arranged in the upper shell, and a high-temperature-resistant insulating cover shell is arranged between the electromagnetic induction coil and the annular magnetic conductive assembly. A traditional stainless steel heating pipe is replaced with the annular magnetic conduction assembly and the electromagnetic induction coil, hot start is fast, the average preheating time is greatly shortened, the heating area of the annular magnetic conduction assembly is greatly increased compared with that of the stainless steel heating pipe, the cooking time of food can be shortened, the cooking efficiency is improved, and therefore rapid heating of the food is achieved.

Description

Technical Field

[0001] This application relates to the technical field of kitchen appliances, and particularly to a cooking device with electromagnetic induction heating. Background Art

[0002] The heating system of existing air fryers generally includes a fan and a heating element. The heating element generates heat, and under the action of the fan, the heat it generates is blown into the pot body, thereby realizing hot air frying and roasting food.

[0003] The heating element is mainly a stainless steel heating tube. The stainless steel heating tube includes a stainless steel outer shell and high-temperature resistance wires evenly distributed in the stainless steel outer shell, and a medium with good thermal conductivity and insulation performance is densely filled in the gap part. When an electric current passes through the resistance wire in the inner core, heat is generated and conducted to the stainless steel outer shell through the medium, and then dissipated through the stainless steel outer shell to heat the air.

[0004] However, in the above stainless steel heating tube, the stainless steel outer shell is a passive heat absorber, and there is a primary electro-thermal conversion and multiple heat transfers inside before the heating tube radiates heat, resulting in a slow heating rate, low energy conversion rate of it, and wasting most of the electric energy; in addition, oil, sewage stains, etc. generated during the cooking process are easily adhered to the surface of the heating tube. However, the heating tube involves strong electrical connection during installation. To ensure the safety of users, it is generally fixed, resulting in increased cleaning difficulty for users, thereby causing corrosion of the heating tube and affecting the heating efficiency of the heating tube. Utility Model Content

[0005] In order to effectively solve the above problems, this application provides a cooking device with electromagnetic induction heating.

[0006] A cooking device with electromagnetic induction heating provided by this application adopts the following technical solutions:

[0007] A cooking device with electromagnetic induction heating includes an upper housing and a lower housing. A pot body assembly is arranged in the lower housing. A first fan blade, an annular magnetic conduction assembly located outside the first fan blade, and a driving motor for driving the first fan blade to rotate are further arranged in the upper housing. The height ratio of the first fan blade to the annular magnetic conduction assembly is 1:1 - 1:1.5; an electromagnetic induction coil matching the annular magnetic conduction assembly is arranged in the upper housing, and a high-temperature resistant insulating cover is arranged between the electromagnetic induction coil and the annular magnetic conduction assembly.

[0008] By adopting the above technical solution, when the electromagnetic induction coil is energized, an alternating magnetic field is generated. This alternating magnetic field penetrates the insulating housing and acts on the annular magnetic conduction component, enabling the annular magnetic conduction component to rapidly increase its temperature within a short period of time and heat over a large area. At the same time, under the rotation of the first wind blade, the heat generated by the annular magnetic conduction component is carried away, thereby causing the surrounding heated air to form a hot air flow, and using the hot air flow to heat and cook food. The annular magnetic conduction component and the electromagnetic induction coil are used to replace the traditional stainless steel heating tube. Using the principle of electromagnetic induction, the annular magnetic conduction component itself generates heat, effectively reducing the transfer loss of heat energy. At the same time, the hot start is faster, the average preheating time is greatly shortened, the heating rate is increased, and the heating area of the annular magnetic conduction component is greatly increased compared with the stainless steel heating tube, which can shorten the cooking time of food and improve the cooking efficiency, thus achieving the rapid heating of food;

[0009] Since the annular magnetic conduction component serves as the heat source, when oil, sewage stains, etc. generated during the cooking process adhere to the annular magnetic conduction component, it will not affect the heating efficiency and service life. At the same time, the installation and replacement of the annular magnetic conduction component are relatively simple;

[0010] The annular magnetic conduction component is located on the periphery of the first wind blade, so that the air flow formed by the first wind blade flows through the annular magnetic conduction component from the side and carries away the heat on the surface of the annular magnetic conduction component, which can quickly heat the air flow. The heated air flow can enter the pot body component under the guiding action of the annular magnetic conduction component, thereby improving the heating efficiency of the cooking device;

[0011] In addition, the height ratio of the first wind blade to the annular magnetic conduction component is 1:1 - 1:1.5, that is, the height of the annular magnetic conduction component is greater than or equal to the height of the first wind blade, which can ensure that the air flow generated by the first wind blade can flow through the annular magnetic conduction component for heating, thereby improving the heating efficiency inside the pot body component.

[0012] Optionally, the height of the annular magnetic conduction component is 15 mm - 50 mm.

[0013] By adopting the above technical solution, the height of the annular magnetic conduction component determines the total length of the electromagnetic induction coil. The greater the height of the annular magnetic conduction component, the greater the total length of the electromagnetic induction coil, and the higher its heating efficiency, which helps the annular magnetic conduction component to fully generate heat. In addition, the greater the height of the annular magnetic conduction component, the larger the area of the air flow generated by its first wind blade flowing through the annular magnetic conduction component, and the faster the temperature rise speed of the air flow, which can improve the overall heating efficiency.

[0014] Optionally, the distance between the outer side surface of the annular magnetic conduction component and the inner surface of the electromagnetic induction coil is 5 mm - 20 mm.

[0015] By adopting the above technical solution, while ensuring that the annular magnetic conduction component has good heat generation efficiency, the thermal influence of the annular magnetic conduction component on the electromagnetic induction coil can be reduced. If the distance between the outer side surface of the annular magnetic conduction component and the inner surface of the electromagnetic induction coil is less than 5 mm, the positions of the annular magnetic conduction component and the electromagnetic induction coil are too close, and the heat generated by the annular magnetic conduction component is easily conducted to the electromagnetic induction coil, resulting in overheating or burning of the electromagnetic induction coil and affecting the stability of the operation of the electromagnetic induction coil; if the distance between the outer side surface of the annular magnetic conduction component and the inner surface of the electromagnetic induction coil is greater than 20 mm, the positions of the annular magnetic conduction component and the electromagnetic induction coil are too far apart, such that the annular magnetic conduction component cannot well sense the alternating magnetic field generated by the electromagnetic induction coil, thereby affecting the heat generation efficiency of the annular magnetic conduction component.

[0016] Optionally, a coil bracket made of an insulating material is provided inside the upper housing, and the electromagnetic induction coil is installed outside the coil bracket, and the coil bracket and the inductor have the same shape.

[0017] Optionally, there is a gap between the annular magnetic conduction component and the insulating housing, forming a hot air duct communicating with the inside of the pot body assembly, and ventilation holes communicating with the hot air duct are provided on the annular magnetic conduction component.

[0018] Optionally, a flow guiding member is provided on the inner side wall of the annular magnetic conduction component, and an opening communicating with the ventilation hole is provided on the flow guiding member, and the orientation of the opening is the same as the rotation direction of the driving motor.

[0019] Optionally, a flanging extending outwards is provided on the periphery of the insulating housing, the flanging is connected to the upper housing, and the electromagnetic induction coil is provided close to the side wall of the insulating housing.

[0020] Optionally, a cold air cavity is formed between the top of the insulating housing and the upper housing, and the electromagnetic induction coil is located in the cold air cavity; a second wind blade connected to the driving motor is provided in the cold air cavity, and an air inlet communicating the cold air cavity with the outside air is provided on the upper housing or the lower housing.

[0021] Optionally, an exhaust passage communicating with the outside is provided on the insulating housing.

[0022] Optionally, a first air outlet is provided at the top of the insulating housing, a second air outlet is provided on the upper housing, the exhaust passage passes through the first air outlet and extends to the second air outlet; or, the exhaust passage passes through the first air outlet and extends to the outside from the second air outlet. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the cooking device shown in Embodiment 1 of the present application.

[0024] Figure 2It is a schematic structural diagram of the annular magnetic conduction component and the electromagnetic induction coil shown in Embodiment 1 of the present application.

[0025] Figure 3 It is a schematic structural diagram of the annular magnetic conduction component shown in Embodiment 1 of the present application.

[0026] Figure 4 It is another schematic structural diagram of the annular magnetic conduction component and the electromagnetic induction coil shown in Embodiment 1 of the present application.

[0027] Figure 5 is Figure 4 an enlarged view of part A in

[0028] Figure 6 It is a schematic structural diagram of the cooking device shown in Embodiment 2 of the present application.

[0029] Figure 7 It is a schematic structural diagram of the annular magnetic conduction component shown in Embodiment 2 of the present application.

[0030] Description of reference numerals: 1, upper housing; 2, lower housing; 21, inner container; 3, first fan blade; 4, annular magnetic conduction component; 41, positioning block; 42, ventilation hole; 43, flow guiding member; 44, air outlet; 5, driving motor; 6, electromagnetic induction coil; 7, pot body assembly; 71, pot body; 72, guard plate; 73, handle; 8, insulating cover; 81, flanging; 82, mounting flange; 9, coil bracket; 10, exhaust passage; 11, hot air duct; 12, motor bracket; 13, accommodation cavity; 14, cold air cavity; 15, second fan blade; 16, first air inlet; 17, sandwich space; 18, convex portion; 19, second air inlet. Detailed Description of the Invention

[0031] The present application will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments are only specific elaborations of the present application, and their purpose is to enable those skilled in the art to better understand the technical solutions of the present application, and should not be regarded as a limitation to the present application.

[0032] In the description of the present application, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. It 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 therefore should not be construed as a limitation to the present application.

[0033] Embodiment 1:

[0034] Embodiment 1 of the present application discloses an electromagnetic heating cooking device. Refer to Figures 1 - 3, including an upper housing 1 and a lower housing 2. A pot body assembly 7 is arranged inside the lower housing 2. A first wind blade 3, an annular magnetic conduction assembly 4 located outside the first wind blade 3, and a driving motor 5 for driving the first wind blade 3 to rotate are also arranged inside the upper housing 1. The height ratio of the first wind blade 3 to the annular magnetic conduction assembly 4 is 1:1 - 1:1.5. An electromagnetic induction coil 6 matching the annular magnetic conduction assembly 4 is arranged inside the upper housing 1, and a high-temperature resistant insulating cover 8 is arranged between the electromagnetic induction coil 6 and the annular magnetic conduction assembly 4.

[0035] Through the interaction between the annular magnetic conduction assembly 4 and the electromagnetic induction coil 6, the temperature of the annular magnetic conduction assembly 4 can rise rapidly within a short time and can generate heat over a large area. During the rotation of the first wind blade 3, the heat generated by the annular magnetic conduction assembly 4 can be formed into a hot air flow and blown into the pot body assembly 7 to heat the food. Using the annular magnetic conduction assembly 4 and the electromagnetic induction coil 6 to replace the traditional stainless steel heating tube, the hot start is faster, the average preheating time is greatly shortened, its heating area is greatly increased, the cooking time of the food can be shortened, the cooking efficiency can be improved, and thus the rapid heating of the food can be realized.

[0036] Since the annular magnetic conduction assembly 4 is located outside the first wind blade 3, the air flow formed by the first wind blade 3 flows through the annular magnetic conduction assembly 4 from the side and takes away the heat on the surface of the annular magnetic conduction assembly 4, which can quickly heat the air flow. The heated air flow can enter the pot body assembly 7 under the guiding action of the annular magnetic conduction assembly 4, thereby improving the heating efficiency of the cooking device. The height ratio of the first wind blade 3 to the annular magnetic conduction assembly 4 is 1:1 - 1:1.5, that is, the height of the annular magnetic conduction assembly 4 is greater than or equal to the height of the first wind blade 3, which can ensure that the air flow generated by the first wind blade 3 can flow through the annular magnetic conduction assembly 4 for heating, thereby improving the heating efficiency inside the pot body assembly 7.

[0037] In addition, a high-temperature resistant insulating cover 8 is arranged between the electromagnetic induction coil 6 and the annular magnetic conduction assembly 4. While not affecting the heat generation efficiency of the annular magnetic conduction assembly 4, it can effectively prevent the heat generated by the annular magnetic conduction assembly 4 from being transferred to the electromagnetic induction coil 6, avoid the electromagnetic induction coil 6 having too high a temperature rise, thus affecting the performance of the electromagnetic induction coil 6, extend the service life of the electromagnetic induction coil 6, reduce the probability of the electromagnetic induction coil 6 malfunctioning, and further reduce the maintenance cost of the cooking device.

[0038] It should be noted that the height of the annular magnetic conduction component 4 is 15 mm - 50 mm. Its height determines the total length of the electromagnetic induction coil 6. The greater the height of the annular magnetic conduction component 4, the greater the total length of the electromagnetic induction coil 6, and the higher its heating efficiency, which helps the annular magnetic conduction component 4 to generate heat sufficiently. In addition, the greater the height of the annular magnetic conduction component 4, the larger the area of the airflow generated by the first wind blade 3 flowing through the annular magnetic conduction component 4, and the faster the temperature rise speed of the airflow, which can improve the overall heating efficiency.

[0039] In addition, the distance between the outer side surface of the annular magnetic conduction component 4 and the inner surface of the electromagnetic induction coil 6 is 5 mm - 20 mm, which can ensure good heat generation efficiency of the annular magnetic conduction component 4 while reducing the thermal influence of the annular magnetic conduction component 4 on the electromagnetic induction coil 6. If the distance between the outer side surface of the annular magnetic conduction component 4 and the inner surface of the electromagnetic induction coil 6 is less than 5 mm, the positions of the annular magnetic conduction component 4 and the electromagnetic induction coil 6 are too close, and the heat generated by the annular magnetic conduction component 4 is easily conducted to the electromagnetic induction coil 6, resulting in overheating or burnout of the electromagnetic induction coil 6 and affecting the working stability of the electromagnetic induction coil 6; if the distance between the outer side surface of the annular magnetic conduction component 4 and the inner surface of the electromagnetic induction coil 6 is greater than 20 mm, the positions of the annular magnetic conduction component 4 and the electromagnetic induction coil 6 are too far apart, so that the annular magnetic conduction component 4 cannot well sense the alternating magnetic field generated by the electromagnetic induction coil 6, thus affecting the heat generation efficiency of the annular magnetic conduction component 4.

[0040] Among them, the thickness of the insulating housing 8 is 2 mm - 5 mm. The thickness of the insulating housing 8 is not too thin to increase the manufacturing difficulty of the insulating housing 8, thus helping to reduce the manufacturing cost of the insulating housing 8; the thickness of the insulating housing 8 is not too thick to cause too large a distance between the electromagnetic induction coil 6 and the annular magnetic conduction component 4, thus helping to ensure the heat generation efficiency of the annular magnetic conduction component 4. It should be noted that the insulating housing 8 can be made of a microcrystalline panel, which has higher strength, better insulation performance, stable dielectric constant and good thermal stability; it can also be made of a ceramic plate, which has the characteristics of high temperature resistance and impact resistance, and can ensure the structural stability and safety of the cooking equipment.

[0041] In this embodiment, the distance between the outer surface of the annular magnetic conduction component 4 and the inner surface of the insulating housing 8 is 3 mm - 15 mm, which helps to reduce the heat transfer of the annular magnetic conduction component 4 to the insulating housing 8.

[0042] In other embodiments, in combination with Figure 4 and Figure 5 , the distance between the outer surface of the insulating housing 8 and the inner surface of the electromagnetic induction coil 6 is 3 mm - 15 mm, and the outer surface of the annular magnetic conduction component 4 is in contact with the inner surface of the insulating housing 8, avoiding the heat generated by the annular magnetic conduction component 4 from being conducted to the electromagnetic induction coil 6, and at the same time making the heating of the annular magnetic conduction component 4 more uniform.

[0043] The annular magnetic conduction component 4 can be made of magnetic conduction material or a mixture of magnetic conduction material and non-magnetic conduction material. For example, the annular magnetic conduction component 4 can be formed by casting pig iron, or can be formed by ferroalloys such as steel and cast iron. The entire annular magnetic conduction component 4 can generate heat under the action of the alternating magnetic field of the electromagnetic induction coil 6, with good heating effect and relatively low manufacturing cost. In other embodiments, the annular magnetic conduction component 4 includes a bracket made of non-magnetic conduction component and a plurality of magnetic conduction sheets fixedly arranged on the bracket. The magnetic conduction sheets are made of magnetic conduction material or a mixture of magnetic conduction material and non-magnetic conduction material. The magnetic conduction sheets can enhance the electromagnetic induction heating effect of the bracket, and the number of magnetic conduction sheets can be increased or decreased according to needs.

[0044] Furthermore, a coil bracket 9 made of insulating material is also arranged inside the upper housing 1 and outside the insulating cover 8. The electromagnetic induction coil 6 is wound around the coil bracket 9 to ensure the stability and safety performance of the electromagnetic induction coil 6; and in cooperation with the insulating cover 8, sufficient insulation performance is provided to avoid short circuit caused by the contact between the electromagnetic induction coil 6 and external metal, and at the same time, it can isolate the current. The shapes of the coil bracket 9 and the annular magnetic conduction component 4 are the same, which is beneficial to improving the heating effect of the annular magnetic conduction component 4.

[0045] Specifically, the annular magnetic conduction component 4 can be in the shape of the cross-section of the cooking device. For example, when the cross-section of the cooking device is circular, the annular magnetic conduction component 4 can be set as a circular ring shape and can be adapted to the electromagnetic induction coil 6 that is generally circular ring-shaped, which further helps the annular magnetic conduction component 4 generate more heat. In other embodiments, when the cross-section of the cooking device is square, the annular magnetic conduction component 4 can be set as a square ring shape, and its electromagnetic induction coil 6 is in a square ring shape corresponding to the annular magnetic conduction component 4.

[0046] The top diameter of the annular magnetic conduction component 4 is smaller than the bottom diameter, that is, the annular magnetic conduction component 4 is arranged in a horn shape. It can guide the airflow generated by the first wind blade 3, which helps to introduce the hot airflow into the pot body assembly 7 and makes the hot airflow enter the periphery inside the pot body assembly 7. The hot airflow inside the pot body assembly 7 flows to the first wind blade 3 for circulation under the return air action of the first wind blade 3, thereby improving the uniformity of food heating inside the pot body assembly 7.

[0047] In this embodiment, a flanging 81 extending outward is arranged on the periphery of the insulating cover 8. The flanging 81 is connected to the upper housing 1, and the electromagnetic induction coil 6 is arranged close to the side wall of the insulating cover 8. The electromagnetic induction coil 6 is isolated from the inside of the pot body assembly 7 through the insulating cover 8 and the flanging 81. It can not only prevent the heat inside the pot body assembly 7 from being conducted to the electromagnetic induction coil 6, which is convenient for ensuring the stability of the operation of the electromagnetic induction coil 6, but also prevent the oil stains and dirt inside the pot body assembly 7 from adhering to the electromagnetic induction coil 6, which is beneficial to reducing the cleaning difficulty of the cooking device.

[0048] By replacing the traditional reflective disc with the insulating housing 8, it can not only effectively prevent the heat generated by the annular magnetic conductive component 4 from being transferred to the electromagnetic induction coil 6, avoid excessive temperature rise of the electromagnetic induction coil 6, but also play a role in guiding and reflecting the hot air flow, thereby saving production costs.

[0049] The annular magnetic conductive component 4 is installed on the insulating housing 8 and is detachably connected to the insulating housing 8. When the oil stains and dirt generated during food cooking adhere to the annular magnetic conductive component 4, the annular magnetic conductive component 4 can be disassembled for cleaning, further reducing the cleaning difficulty of the cooking device. Specifically, a positioning block 41 extending inward or outward is provided at the top of the annular magnetic conductive component 4, and an L-shaped mounting flange 82 is provided on the insulating housing 8. The positioning block 41 cooperates with the mounting flange 82 to fix the annular magnetic conductive component 4 and the insulating housing 8 together. When it is necessary to clean the annular magnetic conductive component 4, rotate the annular magnetic conductive component 4 to make the positioning block 41 disengage from the mounting flange 82, and the annular magnetic conductive component 4 can be disassembled from the insulating housing 8.

[0050] In addition, a cold air cavity 14 is formed between the insulating housing 8 and the top of the upper housing 1, and the electromagnetic induction coil 6 is located in the cold air cavity 14; a second air blade 15 connected to the drive motor 5 is provided in the cold air cavity 14, and a first air inlet 16 for communicating the cold air cavity 14 with the outside air is provided on the upper housing 1 or the lower housing 2, and a cold air outlet communicating with the cold air cavity 14 is provided on the upper housing 1. It should be noted that the cold air outlet can be provided separately or communicated with the hot air duct 11.

[0051] It can be understood that during the operation of the cooking device, the electromagnetic induction coil 6 will generate heat. If it is not dissipated in time, it is easy to cause the electromagnetic induction coil 6 to malfunction, reduce the service life of the electromagnetic induction coil 6, and increase the maintenance cost of the cooking device. By arranging the electromagnetic induction coil 6 in the cold air cavity 14, the outside cold air enters the cold air cavity 14 through the first air inlet 16 under the suction of the second air blade 15, which can dissipate the heat of the electromagnetic induction coil 6 and reduce the probability of the electromagnetic induction coil 6 malfunctioning. In addition, by arranging the second air blade 15, the air flow velocity in the cold air cavity 14 can be increased, the heat dissipation effect of the electromagnetic induction coil 6 in the cold air cavity 14 can be improved, the service life of the cooking device can be extended while ensuring the reliable operation of the cooking device, and the user experience can be improved.

[0052] Specifically, a motor frame 12 is arranged in the upper shell 1 and above the insulating cover 8, a cold air chamber 14 is formed by the insulating cover 8 and the motor frame 12, a receiving chamber 13 is formed between the motor frame 12 and the upper shell 1, the receiving chamber 13 is communicated with the cold air chamber 14, and the driving motor 5 is located in the receiving chamber 13. An inner pot 21 is arranged in the lower shell 2, and the front sides of the lower shell 2 and the inner pot 21 are both provided with openings. The pot body assembly 7 includes a pot body 71 and a guard plate 72 arranged on the front side of the pot body 71, a handle 73 is arranged on the guard plate 72, the pot body 71 is inserted into the inner pot 21 through the opening, and the guard plate 72 covers and seals the opening. The inner pot 21 is sealed with the flange 81 of the insulating cover 8, so that the first fan blade 3 forms a hot air flow with the heat generated by the annular magnetic conductive assembly 4 during the rotation process, and blows it into the pot body assembly 7 to heat the food. In other embodiments, the upper shell 1 is buckled onto the lower shell 2, one side of the upper shell 1 and the lower shell 2 are hinged, and the top or front side of the lower shell 2 and the inner pot 21 are provided with an opening for inserting the pot body assembly 7.

[0053] An interlayer space 17 connected to the cold air cavity 14 is provided between the inner liner 21 and the lower shell 2, and the first air inlet 16 is provided at the bottom of the lower shell 2 and is connected to the interlayer space 17. When the second fan blade 15 is in a rotating state, external cold air enters the interlayer space 17 through the first air inlet 16, and the cold air in the interlayer space 17 takes away the heat of the inner liner 21 and the lower shell 2 and then flows into the cold air cavity 14, cooling and dissipating the electromagnetic induction coil 6 in the cold air cavity 14, and at the same time, the cooling effect on the lower shell 2 can be improved.

[0054] In addition, during the operation of the cooking device, the heat generated by the electromagnetic induction coil 6 is higher than the heat generated by the drive motor 5. The drive motor 5 and the electromagnetic induction coil 6 are separated by the motor frame 12, so that the electromagnetic induction coil 6 can be effectively dissipated while reducing the heat transferred to the drive motor 5 by the electromagnetic induction coil 6, thereby reducing the problem of heat dissipation of the drive motor 5, thereby ensuring effective heat dissipation of the drive motor 5, and further reducing the probability of failure of the drive motor 5 and the electromagnetic induction coil 6, thereby reducing the maintenance cost of the cooking device.

[0055] Among them, the bottom of the lower shell 2 is provided with supporting feet, and the supporting feet are arranged at the four corners of the lower shell 2 to support the lower shell 2, and at the same time, there is a gap between the lower shell 2 and the desktop for placing the cooking device, so that the external cold air can enter the interlayer space 17 through the first air inlet 16. In other embodiments, the cooking device can also be placed on the desktop with supporting feet, so that there is a gap between the cooking device and the desktop for cold air to enter. In this embodiment, the bottom of the lower shell 2 protrudes upward to form a protrusion 18, and the first air inlet 16 is arranged on the protrusion 18, which, together with the supporting feet, can help the external cold air enter the interlayer space 17 through the first air inlet 16.

[0056] In this embodiment, a second air inlet 19 communicating with the accommodation cavity 13 is provided on the upper housing 1, so that external cold air can enter the accommodation cavity 13 through the second air inlet 19 to directly cool the drive motor 5.

[0057] In addition, an exhaust passage 10 communicating with the outside is provided on the insulating housing 8. A first air outlet is provided at the top of the insulating housing 8, and a second air outlet is provided on the upper housing 1. The exhaust passage 10 passes through the first air outlet and extends to the second air outlet; or, the exhaust passage 10 passes through the first air outlet and extends to the outside from the second air outlet. Since the electromagnetic induction coil 6 is located on the side of the insulating housing 8, the first air outlet is provided at the top of the insulating housing 8 so that the excess heat in the pot body assembly 7 can be discharged through the exhaust passage 10.

[0058] Embodiment 2:

[0059] The difference between this embodiment and Embodiment 1 lies in: combined with Figure 6 and Figure 7 , there is a gap between the outer surface of the annular magnetic conduction assembly 4 and the inner surface of the insulating housing 8, forming a hot air duct 11 communicating with the inside of the pot body assembly 7. A ventilation hole 42 communicating with the hot air duct 11 is provided on the annular magnetic conduction assembly 4, so that the air flow formed by the first air blade 3 can flow to the hot air duct 11 through the ventilation hole 42. Air flows through both the inner and outer surfaces of the annular magnetic conduction assembly 4, which can more evenly take away the heat on the surface of the annular magnetic conduction assembly 4, thereby improving the heating efficiency inside the pot body assembly 7; at the same time, the overall temperature of the annular magnetic conduction assembly 4 tends to be uniform, so that the temperature rise speed of the annular magnetic conduction assembly 4 can be increased.

[0060] It should be noted that the hot air duct 11 can be set to 5 mm - 15 mm. If the interval of the hot air duct 11 is too close, the air flow flowing to the hot air duct 11 is likely to collide with the inner surface of the insulating housing 8 and be reflected back, resulting in loss of air volume and affecting the heat circulation inside the pot body assembly 7; if the interval of the hot air duct 11 is too far, the distance between the annular magnetic conduction assembly 4 and the electromagnetic induction coil 6 is too far, affecting the heat generation efficiency of the annular magnetic conduction assembly 4.

[0061] The side wall of the insulating housing 8 is arranged in a horn shape and has the same shape as the annular magnetic conduction assembly 4, which can further take away the heat on the annular magnetic conduction assembly 4 and can guide the air flow of the hot air duct 11, helping to introduce the hot air flow into the inside of the pot body assembly 7 and making the hot air flow enter the periphery of the inside of the pot body assembly 7. The hot air flow inside the pot body assembly 7 flows to the first air blade 3 for circulation under the return air action of the first air blade 3, thereby improving the uniformity of food heating inside the pot body assembly 7.

[0062] In other embodiments, the diameter ratio of the first wind blade 3 to the annular magnetic conduction component 4 is 1:1.1 - 1:1.25, such that a part of the air flow formed by the first wind blade 3 flows through the inner surface of the annular magnetic conduction component 4 from the side, taking away the heat on the inner surface of the annular magnetic conduction component 4, and entering the interior of the pot body assembly 7 under the guiding action of the annular magnetic conduction component 4 itself; another part of the air flow flows to the hot air duct 11 through the ventilation holes 42, taking away the heat on the outer surface of the annular magnetic conduction component 4, and entering the interior of the pot body assembly 7 under the guiding action of the insulating cover 8; a circulating air flow is formed on both the inner and outer sides of the annular magnetic conduction component 4, thereby improving the heating efficiency inside the pot body assembly 7 and the uniformity of food heating. It should be noted that this diameter ratio is the ratio of the top diameter of the first wind blade 3 to the diameter of the annular magnetic conduction component 4 corresponding to the top position of the first wind blade 3.

[0063] Within this diameter ratio range, the smaller the diameter ratio of the first wind blade 3 to the annular magnetic conduction component 4, the smaller the distance between the first wind blade 3 and the annular magnetic conduction component 4, the smaller the air volume on the inner side of the annular magnetic conduction component 4, the larger the air volume on the outer side, but the greater the air volume loss on the inner side; the larger the diameter ratio of the first wind blade 3 to the annular magnetic conduction component 4, the larger the distance between the first wind blade 3 and the annular magnetic conduction component 4, the larger the air volume on the inner side of the annular magnetic conduction component 4, the smaller the air volume on the outer side, and the smaller the air volume loss on the inner side. By reasonably arranging the diameter ratio of the first wind blade 3 to the annular magnetic conduction component 4, it helps to ensure the air intake on both the inner and outer sides of the annular magnetic conduction component 4, while reducing the air volume loss on the inner side.

[0064] Among them, the opening area of the ventilation holes 42 is 30% - 70% of the single - side surface area of the annular magnetic conduction component 4, so as to reasonably arrange the air intake on both the inner and outer sides of the annular magnetic conduction component 4, thereby improving the circulation efficiency of the hot air flow inside the pot body assembly 7 and enhancing the overall heating effect.

[0065] A flow - guiding member 43 is provided on the inner side wall of the annular magnetic conduction component 4, and an air outlet 44 communicating with the ventilation holes 42 is provided on the flow - guiding member 43. The orientation of the air outlet 44 is the same as the rotation direction of the driving motor 5, which can play a role in guiding the air flow, helping the air flow generated by the first wind blade 3 to flow towards the outer side of the annular magnetic conduction component 4, so that air flows through both the inner and outer surfaces of the annular magnetic conduction component 4, and then the heat on the surface of the annular magnetic conduction component 4 can be taken away more evenly, thereby improving the overall heating efficiency.

[0066] The above are all preferred embodiments of this application. It does not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An electromagnetic induction heating cooking device, comprising an upper shell and a lower shell, wherein a pot assembly is arranged in the lower shell, characterized in that: The upper shell body is also provided with a first fan blade, an annular magnetic conductive component located at the periphery of the first fan blade, and a driving motor for driving the first fan blade to rotate, and the height ratio of the first fan blade and the annular magnetic conductive component is 1:1-1:1.5; the upper shell body is provided with an electromagnetic induction coil matching the annular magnetic conductive component, and a high-temperature resistant insulating cover is provided between the electromagnetic induction coil and the annular magnetic conductive component.

2. The electromagnetic induction heating cooking device according to claim 1, characterized in that: The height of the annular magnetic conductive component is 15mm-50mm.

3. The electromagnetic induction heating cooking device according to claim 1 or 2, characterized in that: The distance between the outer side surface of the annular magnetic conductive component and the inner surface of the electromagnetic induction coil is 5mm-20mm.

4. The electromagnetic induction heating cooking device according to claim 1 or 2, characterized in that: A coil support made of insulating material is arranged in the upper shell, and the electromagnetic induction coil is installed outside the coil support, and the coil support and the induction body have the same shape.

5. The electromagnetic induction heating cooking device according to claim 1, characterized in that: There is a gap between the annular magnetic conductive component and the insulating cover shell to form a hot air duct connected to the inside of the pot body component. The annular magnetic conductive component is provided with a ventilation hole connected to the hot air duct.

6. The electromagnetic induction heating cooking device according to claim 5, characterized in that: A flow guide is arranged on the inner side wall of the annular magnetic conductive component. The flow guide is provided with an opening connected with the ventilation hole. The direction of the opening is the same as the rotation direction of the driving motor.

7. The electromagnetic induction heating cooking device according to claim 1, characterized in that: The outer periphery of the insulating shell is provided with a flange extending outward, the flange is connected to the upper shell, and the electromagnetic induction coil is arranged close to the side wall of the insulating shell.

8. The electromagnetic induction heating cooking device according to claim 7, characterized in that: A cold air cavity is formed between the insulating cover and the top of the upper shell, and the electromagnetic induction coil is located in the cold air cavity; a second fan blade connected to the drive motor is arranged in the cold air cavity, and an air inlet connecting the cold air cavity with the outside air is provided on the upper shell or the lower shell.

9. The electromagnetic induction heating cooking device according to claim 1, characterized in that: The insulating cover is provided with an exhaust passage communicating with the outside.

10. The electromagnetic induction heating cooking device according to claim 9, characterized in that: A first air outlet is arranged on the top of the insulating shell, a second air outlet is arranged on the upper shell, the exhaust passage passes through the first air outlet and extends to the second air outlet; or, the exhaust passage passes through the first air outlet and extends to the outside from the second air outlet.

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