An electromagnetic oven refrigeration system and an electromagnetic oven

Abstract

This application belongs to the technical field of household appliances, and discloses an induction cooker refrigeration system and an induction cooker, including a power supply circuit, a control unit, an electromagnetic refrigeration device, and a switch control circuit; the power supply circuit is used to supply power to the control unit, the electromagnetic refrigeration device, and the switch control circuit; the electromagnetic refrigeration device includes a magnetic material part, a heat dissipation device, and an electromagnetic module, the electromagnetic module is used to generate an alternating on-off magnetic field, so that the magnetic material part generates a magnetocaloric effect to alternately release and absorb heat, the heat dissipation device is used to dissipate heat from the magnetic material part when the magnetic material part releases heat, and the magnetic material part is used to absorb heat from the cooking utensils when absorbing heat; the control unit is electrically connected to the electromagnetic refrigeration device and controls the electromagnetic module to generate an alternating on-off magnetic field through the switch control circuit; thus, the cooking utensils can be effectively cooled.

Description

Technical Field

[0001] This application relates to the technical field of household appliances, and more particularly, to an induction cooker refrigeration system and an induction cooker. Background Art

[0002] An induction cooker, also known as an electromagnetic stove, has the characteristics of high efficiency, safety, and cleanliness, and is therefore widely used in modern kitchens.

[0003] However, the design of traditional induction cookers mainly focuses on the heating function, using the heat generated quickly after electromagnetic action for heat utilization. This single-function design may not meet the diverse needs of users in some cases. Especially in daily life, situations often occur where it is necessary to cool hot food.

[0004] For example, after cooking foods such as porridge, soup, or noodles, these foods are usually too hot to be eaten immediately. To avoid scalding the mouth, it is usually necessary to let the food stand for a period of time until it naturally cools to a suitable eating temperature. This cooling process often takes a relatively long time, which not only affects the dining efficiency but also may cause changes in the taste of the food.

[0005] In addition, in some cooking techniques, quickly cooling ingredients is also an important step. For example, when making certain desserts or salads, it may be necessary to quickly cool the cooked ingredients to maintain their taste and nutrition. Traditional induction cookers cannot meet this need for quick cooling, and users often need to rely on other cooling devices or methods, which increases the complexity and time cost of cooking.

[0006] Therefore, developing an induction cooker system that can cool cooking utensils has important practical significance. Such a system can not only shorten the cooling time of food, improve dining efficiency, but also provide users with more flexible temperature control options to meet different cooking needs. At the same time, it can also increase the functional diversity of induction cookers and enhance the market competitiveness of products.

[0007] In view of the above problems, the existing technology urgently needs to be improved. Summary of the Invention

[0008] The purpose of this application is to provide an induction cooker refrigeration system and an induction cooker that can effectively cool cooking utensils.

[0009] In a first aspect, this application provides an induction cooker refrigeration system for cooling cooking utensils, including a power supply circuit, a control unit, an electromagnetic refrigeration device, and a switch control circuit;

[0010] The power supply circuit is used to supply power to the control unit, the electromagnetic refrigeration device, and the switch control circuit;

[0011] The electromagnetic refrigeration device includes a magnetic material component, a heat dissipation device, and an electromagnetic module. The electromagnetic module is used to generate an alternating on-off magnetic field, so that the magnetic material component generates a magnetocaloric effect to alternately release and absorb heat. The heat dissipation device is used to dissipate heat from the magnetic material component when the magnetic material component releases heat, and the magnetic material component is used to absorb heat from the cooking utensil when it absorbs heat;

[0012] The control unit is electrically connected to the electromagnetic refrigeration device, and controls the electromagnetic module to generate an alternating on-off magnetic field through the switch control circuit.

[0013] This electromagnetic induction cooker refrigeration system uses an electromagnetic refrigeration device to cool the cooking utensil, thereby realizing the cooling of the food in the cooking utensil, solving the problem that traditional electromagnetic induction cookers cannot quickly cool food, and having the advantages of shortening the food cooling time, improving the dining efficiency, providing more flexible temperature control options, and meeting different cooking requirements.

[0014] Preferably, the electromagnetic module includes an S magnetic pole and an N magnetic pole oppositely arranged on both sides of the magnetic material component. When the electromagnetic module is powered on, a magnetic field passing through the magnetic material component is generated between the S magnetic pole and the N magnetic pole.

[0015] This structural design enables a magnetic field passing through the magnetic material component to be generated between the S magnetic pole and the N magnetic pole when the electromagnetic module is powered on. In this way, the magnetic field can be effectively applied to the magnetic material component, so that it generates a magnetocaloric effect.

[0016] Preferably, a first heat insulation net is arranged on the upper side of the magnetic material component, the heat dissipation device is arranged on a side of the magnetic material component other than the upper side, and a second heat insulation net is arranged between the heat dissipation device and the magnetic material component; both the first heat insulation net and the second heat insulation net have a plurality of mesh holes, and the mesh holes can be closed and opened; the first heat insulation net is used to contact the cooking utensil;

[0017] The mesh holes of the first heat insulation net are closed when the magnetic material component releases heat and opened when the magnetic material component absorbs heat; the mesh holes of the second heat insulation net are opened when the magnetic material component releases heat and closed when the magnetic material component absorbs heat.

[0018] This design not only improves the refrigeration efficiency but also avoids heat transfer at inappropriate times, thus solving the problem of heat exchange control between the magnetic material component and the cooking utensil and the heat dissipation device in the electromagnetic induction cooker refrigeration system.

[0019] Preferably, both the first heat insulation net and the second heat insulation net include a fixed net layer with a first mesh, a movable net layer with a second mesh, and a driving device; the fixed net layer and the movable net layer are stacked, and the movable net layer can move relative to the fixed net layer; the driving device is used to drive the movable net layer to reciprocate relative to the fixed net layer, so that the second mesh and the first mesh are aligned to open the mesh, or the second mesh and the first mesh are misaligned to close the mesh.

[0020] Preferably, the electromagnetic refrigeration device further includes a heat insulation shell layer, the magnetic material piece, the heat dissipation device, the electromagnetic module and the second heat insulation net are all arranged in the heat insulation shell layer, the heat insulation shell layer is provided with a heat absorption opening and a heat dissipation opening, the first heat insulation net is arranged at the heat absorption opening, and the heat dissipation device dissipates heat through the heat dissipation opening.

[0021] Preferably, the switch control circuit includes a switch tube and a switch tube driving circuit; the switch tube, the electromagnetic refrigeration device and the power supply circuit are connected to form a magnetic field control loop; the switch tube driving circuit is connected to the control unit, the power supply circuit and the gate of the switch tube, the control unit is used to send a switch control signal to the switch tube driving circuit, and the switch tube driving circuit is used to control the on-off of the switch tube according to the switch control signal.

[0022] Preferably, the power supply circuit includes an AC / DC module, a DC / DC module and a rectifier bridge; the switch tube, the electromagnetic refrigeration device and the rectifier bridge are connected to form the magnetic field control loop, and the rectifier bridge is used to convert the commercial power into direct current; the DC / DC module and the switch tube driving circuit are both electrically connected to the AC / DC module, and the DC / DC module is also electrically connected to the control unit; the AC / DC module is used to convert the commercial power into direct current and supply it to the DC / DC module and the switch tube driving circuit; the DC / DC module is used to regulate the voltage of the direct current provided by the AC / DC module and supply power to the control unit.

[0023] Preferably, the electromagnetic cooker refrigeration system further includes a temperature sensor group, the temperature sensor group is electrically connected to the control unit, and is used to detect the temperatures of the cooking utensils, the magnetic material piece and the heat dissipation opening, and the control unit is used to compare the temperatures of the cooking utensils, the magnetic material piece and the heat dissipation opening to control the on-off of the magnetic field and the opening and closing of the meshes of the first heat insulation net and the second heat insulation net.

[0024] In a second aspect, the present application provides an electromagnetic cooker, including the electromagnetic cooker refrigeration system described above.

[0025] Preferably, the induction cooker further includes a heating system for heating cooking utensils.

[0026] Advantageous effects: The induction cooker refrigeration system and the induction cooker provided by this application use an electromagnetic refrigeration device to cool cooking utensils, thereby realizing the cooling of the food in the cooking utensils, solving the problem that traditional induction cookers cannot quickly cool food, and having the advantages of shortening the food cooling time, improving the dining efficiency, providing more flexible temperature control options, and meeting different cooking needs. Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of the induction cooker refrigeration system provided by the embodiment of this application.

[0028] Figure 2 It is a schematic structural diagram of the electromagnetic refrigeration device.

[0029] Figure 3 It is a schematic structural diagram of the first heat insulation net and the second heat insulation net.

[0030] Label description: 1. Power supply circuit; 101. AC / DC module; 102. DC / DC module; 103. Rectifier bridge; 2. Control unit; 3. Electromagnetic refrigeration device; 301. Magnetic material part; 302. Heat dissipation device; 303. Electromagnetic module; 304. First heat insulation net; 305. Second heat insulation net; 306. Mesh hole; 307. Fixed net layer; 3071. First mesh hole; 308. Movable net layer; 3081. Second mesh hole; 309. Driving device; 310. Heat insulation shell layer; 311. Heat absorption opening; 312. Heat discharge opening; 4. Switch control circuit; 401. Switch tube; 402. Switch tube driving circuit; 5. Filter circuit; 6. Temperature sensor group; 7. Display panel; 8. Cooling fan; 9. Buzzer. Detailed Embodiments

[0031] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Usually, the components of the embodiments of this application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but only represents the selected embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of this application.

[0032] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0033] Traditional induction cookers only have a heating function and cannot meet the user's need to quickly cool hot food. In actual use, just-cooked foods such as porridge, soup, and noodles often need to be left to cool to a suitable temperature before consumption to avoid scalding the mouth. This process of leaving to cool usually takes a long time, affecting the user's dining experience and efficiency. Therefore, the present application aims to solve the technical problem of cooling kitchen utensils by an induction cooker to meet the user's need to quickly cool food.

[0034] If the technical problem of cooling kitchen utensils by an induction cooker cannot be effectively solved, a series of negative impacts will be brought. First, the user's dining experience will be significantly affected, which may lead to too long waiting time or scalding the mouth when eating. Second, the quality of the food may decline due to long-term cooling, such as nutrient loss and poor taste. In addition, the lack of the ability to precisely control the cooling process also limits the application of induction cookers in some special cooking techniques, such as temperature-sensitive molecular cuisine. Therefore, developing an induction cooker refrigeration system that can actively, quickly, and evenly cool kitchen utensils has important technical significance and practical application value.

[0035] For this purpose, please refer to Figures 1 - 3 , the present application provides an induction cooker refrigeration system for cooling kitchen utensils, including a power supply circuit 1, a control unit 2, an electromagnetic refrigeration device 3, and a switch control circuit 4;

[0036] The power supply circuit 1 is used to supply power to the control unit 2, the electromagnetic refrigeration device 3, and the switch control circuit 4;

[0037] The electromagnetic refrigeration device 3 includes a magnetic material member 301, a heat dissipation device 302, and an electromagnetic module 303. The electromagnetic module 303 is used to generate an alternating on-off magnetic field so that the magnetic material member 301 generates a magnetocaloric effect to alternately release and absorb heat. The heat dissipation device 302 is used to dissipate heat from the magnetic material member 301 when the magnetic material member 301 releases heat, and the magnetic material member 301 is used to absorb heat from the kitchen utensils when absorbing heat;

[0038] The control unit 2 is electrically connected to the electromagnetic refrigeration device 3 and controls the electromagnetic module 303 to generate an alternating on-off magnetic field through the switch control circuit 4.

[0039] This electromagnetic induction cooker refrigeration system uses an electromagnetic refrigeration device 3 to cool cooking utensils, thereby achieving the cooling of food in the cooking utensils, solving the problem that traditional electromagnetic induction cookers cannot quickly cool food, and having the advantages of shortening the food cooling time, improving the dining efficiency, providing more flexible temperature control options, and meeting different cooking needs.

[0040] Among them, the control unit 2 is the core component responsible for controlling the entire refrigeration process, and can specifically be implemented using a microcontroller or a digital signal processor. For example, a single-chip microcomputer or an MCU can be used, but it is not limited thereto.

[0041] This application realizes the active cooling function of the electromagnetic induction cooker for cooking utensils by designing an electromagnetic refrigeration device 3 including an electromagnetic module 303, a magnetic material part 301, and a heat dissipation device 302. This design not only expands the functions of the electromagnetic induction cooker, but also improves the convenience and safety of users when using the electromagnetic induction cooker.

[0042] The working process of this system is as follows: The control unit 2 first receives a refrigeration instruction, and then controls the electromagnetic module 303 to generate an alternately on-off magnetic field through the switch control circuit 4. When the electromagnetic module 303 is powered on, a magnetic field is generated. Under the action of this magnetic field, the degree of magnetic moment order of the magnetic material part 301 increases, so the temperature rises, and the heat is released to a place far from the cooking utensils through the heat dissipation device 302; when the electromagnetic module 303 is powered off, the magnetic field quickly disappears, and the degree of magnetic moment order of the magnetic material part 301 decreases, so the temperature drops, and it absorbs heat from the cooking utensils to achieve refrigeration; such a cycle realizes a continuous refrigeration effect.

[0043] Specifically, the electromagnetic module 303 includes an S magnetic pole and an N magnetic pole oppositely arranged on both sides of the magnetic material part 301. When the electromagnetic module 303 is powered on, a magnetic field passing through the magnetic material part 301 is generated between the S magnetic pole and the N magnetic pole.

[0044] This structural design enables a magnetic field passing through the magnetic material part 301 to be generated between the S magnetic pole and the N magnetic pole when the electromagnetic module 303 is powered on (for example Figure 2 in which, S represents the S magnetic pole, and N represents the N magnetic pole). In this way, a magnetic field can be effectively applied to the magnetic material part 301, so that it generates a magnetocaloric effect. By controlling the power on and off of the electromagnetic module 303, the on-off of the magnetic field can be realized alternately, so that the magnetic material part 301 alternately releases heat and absorbs heat. This design can not only effectively generate and control the magnetic field, but also ensure that the magnetic field can fully act on the magnetic material part 301, improving the refrigeration efficiency of the system.

[0045] Furthermore, the S and N poles of the electromagnetic module 303 can be implemented in various forms. For example, an electromagnet can be used. Another way is to use a permanent magnet and change the relative position of the poles through mechanical rotation. Each of these two methods has its own advantages. The control of the electromagnet is more flexible, while the permanent magnet has the characteristics of low energy consumption and high stability.

[0046] Preferably, the electromagnetic module 303 uses an electromagnet. Among them, the electromagnetic module 303 can be composed of two groups of electromagnets. Each group of electromagnets includes two electromagnets with opposite poles arranged on both sides of the magnetic material piece 301; the electromagnetic module 303 can also be composed of at least one electromagnet with a U-shaped iron core (as Figure 2 shown). The U-shaped iron core of this electromagnet semi-encloses to form a receiving cavity. The S and N poles of this electromagnet are respectively located on opposite sides of the receiving cavity, and the magnetic material piece 301 is arranged in the receiving cavity.

[0047] The material of the magnetic material piece 301 can be selected from materials with high magnetocaloric effect, such as alloys of rare earth elements such as gadolinium, lanthanum, and iron. These materials can produce significant temperature changes under the action of an alternating magnetic field, thereby improving the refrigeration efficiency of the system. Preferably, high-entropy alloy (High-entropy alloys, abbreviated as HEA) materials and neodymium iron boron magnetic materials can be selected. They can produce significant temperature changes under the action of an alternating magnetic field, thereby improving the refrigeration efficiency of the system and having a lower cost.

[0048] In some preferred embodiments, see Figure 2 and Figure 3 , a first heat insulation net 304 is arranged on the upper side of the magnetic material piece 301, and the heat dissipation device 302 is arranged on a side of the magnetic material piece 301 other than the upper side (for example, Figure 2 in, the heat dissipation device 302 is arranged on the lower side of the magnetic material piece 301, but not limited to this. For example, it can also be arranged on the front side, rear side, left side, right side or other directions), and a second heat insulation net 305 is arranged between the heat dissipation device 302 and the magnetic material piece 301; both the first heat insulation net 304 and the second heat insulation net 305 have a plurality of mesh holes 306, and the mesh holes 306 can be closed and opened; the first heat insulation net 304 is used to contact the kitchenware (for example, in actual use, the first heat insulation net 304 is horizontally arranged upwards, and the kitchenware is supported by the first heat insulation net 304; but not limited to this);

[0049] The mesh holes 306 of the first heat insulation net 304 are closed when the magnetic material piece 301 releases heat, and opened when the magnetic material piece 301 absorbs heat; the mesh holes 306 of the second heat insulation net 305 are opened when the magnetic material piece 301 releases heat, and closed when the magnetic material piece 301 absorbs heat.

[0050] It should be noted that the up and down directions here are based on Figure 2The description of the placement direction in [it] does not limit the orientation in actual applications.

[0051] By respectively arranging heat-insulating nets with controllable switches on both sides of the magnetic material part 301, precise control of heat transfer is achieved. When the magnetic material part 301 is in the heat absorption state, the first heat-insulating net 304 is opened to allow the heat in the cooking utensil to be absorbed; at the same time, the second heat-insulating net 305 is closed to prevent the heat at the heat dissipation device 302 from flowing back. When the magnetic material part 301 is in the heat release state, the first heat-insulating net 304 is closed to prevent the heat from being transmitted back to the cooking utensil; at the same time, the second heat-insulating net 305 is opened to allow the heat to be dissipated by the heat dissipation device 302. This design not only improves the refrigeration efficiency but also avoids heat transfer at inappropriate times, thus solving the problem of heat exchange control between the magnetic material part 301 and the cooking utensil and the heat dissipation device 302 in the induction cooker refrigeration system.

[0052] Among them, the first heat-insulating net 304 and the second heat-insulating net 305 can be made of thermosensitive materials to automatically open and close the mesh holes 306 at different temperatures, or a mechanical control method can be adopted, and the main body drives the opening and closing of the mesh holes 306.

[0053] For example, in some possible implementation manners, see Figure 3 , both the first heat-insulating net 304 and the second heat-insulating net 305 include a fixed net layer 307 having a first mesh hole 3071, a moving net layer 308 having a second mesh hole 3081, and a driving device 309; the fixed net layer 307 and the moving net layer 308 are stacked, and the moving net layer 308 can move relative to the fixed net layer 307; the driving device 309 is used to drive the moving net layer 308 to reciprocate relative to the fixed net layer 307 so that the second mesh hole 3081 and the first mesh hole 3071 are aligned to open the mesh hole 306, or the second mesh hole 3081 and the first mesh hole 3071 are misaligned to close the mesh hole 306.

[0054] When heat insulation is required, the second mesh hole 3081 is misaligned with the first mesh hole 3071 to form a closed state; when heat transfer is required, the second mesh hole 3081 is aligned with the first mesh hole 3071 to form an open state. This mechanism can effectively control the heat transfer between the magnetic material part 301 and the cooking utensil, as well as between the magnetic material part 301 and the heat dissipation device 302, so as to achieve precise cooling control of the cooking utensil.

[0055] This technical solution realizes the opening and closing control of the mesh holes of the heat-insulating net through a simple and ingenious mechanical structure, avoids a complex electronic control system, and improves the reliability and durability of the system. At the same time, this design also makes the control of heat transfer more precise and flexible, can be adjusted according to different cooling requirements, and improves the efficiency and practicability of the induction cooker refrigeration system.

[0056] Among them, at least one of the fixed network layer 307 and the mobile network layer 308 is made of heat-insulating materials (such as plastics, ceramic materials, etc.). For the first heat-insulating net 304, the net layer far from the magnetic material part 301 can be made of metal materials (in this case, the other net layer is made of heat-insulating materials). On the one hand, it can exchange heat with the kitchenware more effectively, and absorb heat from the kitchenware more efficiently when absorbing heat. On the other hand, it can provide stronger structural strength, so as to support the kitchenware more effectively. For the second heat-insulating net 305, the net layer close to the magnetic material part 301 can be made of metal materials (in this case, the other net layer is made of heat-insulating materials). On the one hand, it can exchange heat with the magnetic material part 301 more effectively, and absorb heat from the magnetic material part 301 more efficiently when releasing heat and dissipate heat through the heat dissipation device 302. On the other hand, it can provide stronger structural strength.

[0057] Among them, there are various implementation ways for the sliding connection structure between the mobile network layer 308 and the fixed network layer 307. For example Figure 3 In, sliding grooves are provided on the opposite two side edges of the fixed network layer 307, and the opposite two sides of the mobile network layer 308 respectively extend into the corresponding sliding grooves. Thus, the mobile network layer 308 can move along the extending direction of the sliding grooves; but it is not limited to this.

[0058] Among them, the driving device 309 can adopt various forms, such as a piezoelectric material driving device, a motor driving device, a hydraulic driving device or a pneumatic driving device, etc.

[0059] The design of the mesh holes 306 can also be optimized according to actual needs. For example, mesh holes 306 of different shapes such as circular, square or hexagonal can be adopted to meet different heat transfer requirements. The size and distribution density of the mesh holes 306 can also be adjusted according to specific application scenarios to achieve the best heat control effect.

[0060] Among them, the heat dissipation device 302 can adopt various forms, such as at least one of including heat sinks, heat pipes, fan radiators, etc. For example Figure 2 In, the heat dissipation device 302 includes a fan radiator.

[0061] In some preferred embodiments, see Figure 2 , the electromagnetic refrigeration device 3 further includes a heat-insulating shell layer 310. The magnetic material part 301, the heat dissipation device 302, the electromagnetic module 303 and the second heat-insulating net 305 are all arranged inside the heat-insulating shell layer 310. The heat-insulating shell layer 310 is provided with a heat absorption opening 311 and a heat discharge opening 312. The first heat-insulating net 304 is arranged at the heat absorption opening 311, and the heat dissipation device 302 discharges heat through the heat discharge opening 312.

[0062] The heat insulation shell layer 310 plays a role in overall encapsulation and heat insulation. The magnetic material component 301, the heat dissipation device 302, the electromagnetic module 303, and the second heat insulation net 305 are all arranged inside it, which helps to improve the refrigeration efficiency (when absorbing heat, more heat is absorbed from the heat absorption opening 311, so as to concentrate on absorbing heat from the cooking utensil, and when dissipating heat, heat is mainly dissipated from the heat exhaust opening 312, more effectively avoiding the heat flowing back to the cooking utensil) and the integrity of the system.

[0063] The settings of the heat absorption opening 311 and the heat exhaust opening 312 achieve the directional flow of heat. The first heat insulation net 304 is arranged at the heat absorption opening 311, which can control the heat exchange between the cooking utensil and the magnetic material component 301. The heat dissipation device 302 dissipates heat through the heat exhaust opening 312, ensuring that heat can be effectively discharged from the system.

[0064] Specifically, the heat insulation shell layer 310 can be made of a variety of materials. For example, polyurethane foam, fiberglass or other materials with good heat insulation performance can be used. The thickness of the heat insulation shell layer 310 can be adjusted according to actual needs. This design can effectively isolate the interference of external heat, thereby improving the energy efficiency of the entire system.

[0065] In some embodiments, see Figure 1 , the switch control circuit 4 includes a switching transistor 401 and a switching transistor drive circuit 402; the switching transistor 401, the electromagnetic refrigeration device 3, and the power supply circuit 1 are connected to form a magnetic field control loop; the switching transistor drive circuit 402 is connected to the control unit 2, the power supply circuit 1, and the gate of the switching transistor 401. The control unit 2 is used to send a switch control signal to the switching transistor drive circuit 402, and the switching transistor drive circuit 402 is used to control the on / off of the switching transistor 401 according to the switch control signal (thereby controlling the on / off of the current of the electromagnetic module 303 and realizing the on / off of the magnetic field).

[0066] The switching transistor 401 and the switching transistor drive circuit 402 in the switch control circuit 4 are key components for precisely controlling the electromagnetic module 303. The switching transistor 401 forms a magnetic field control loop with the electromagnetic refrigeration device 3 and the power supply circuit 1, and controls the working state of the electromagnetic module 303 by controlling the on / off of the switching transistor 401. The switching transistor drive circuit 402, as an interface between the control unit 2 and the switching transistor 401, receives the switch control signal sent by the control unit 2 and converts it into a signal suitable for controlling the gate of the switching transistor 401.

[0067] This design realizes the precise control of the electromagnetic module 303 through the coordinated operation of the control unit 2, the switch tube drive circuit 402, and the switch tube 401. The control unit 2 can generate switch control signals with different frequencies and duty cycles as needed. The switch tube drive circuit 402 converts these signals into signals that can drive the opening and closing of the gate of the switch tube 401, thereby controlling the on and off of the switch tube 401. In this way, the on and off frequency and duration of the magnetic field can be flexibly adjusted, and then the magnetothermal effect of the magnetic material part 301 can be precisely controlled to achieve effective cooling of the kitchenware.

[0068] The switch tube 401 can adopt various types of semiconductor switch devices, such as MOS tubes or IGBT tubes, etc. The switch tube drive circuit 402 can adopt an existing dedicated drive chip or a drive circuit composed of discrete components. For example, an optically isolated drive circuit can be used to improve the anti-interference ability of the system.

[0069] To ensure that the electromagnetic module 303 can generate a stable alternating magnetic field and reduce electromagnetic interference, a filter circuit 5 can be added to the magnetic field control loop, as Figure 1 shown. The filter circuit 5 can adopt existing technologies and will not be elaborated here.

[0070] Furthermore, as shown in Figure 1 , the power supply circuit 1 includes an AC / DC module 101, a DC / DC module 102, and a rectifier bridge 103; the switch tube 401, the electromagnetic refrigeration device 3, and the rectifier bridge 103 (which may also include the filter circuit 5) are connected to form a magnetic field control loop. The rectifier bridge 103 is used to convert the commercial power into direct current; both the DC / DC module 102 and the switch tube drive circuit 402 are electrically connected to the AC / DC module 101, and the DC / DC module 102 is also electrically connected to the control unit 2; the AC / DC module 101 is used to convert the commercial power into direct current and supply it to the DC / DC module 102 and the switch tube drive circuit 402; the DC / DC module 102 is used to regulate the voltage of the direct current provided by the AC / DC module 101 and then supply power to the control unit 2.

[0071] This power supply circuit design solves the different power requirements of different components in the induction cooker refrigeration system. The AC / DC module 101 and the rectifier bridge 103 respectively provide direct current for different components, while the DC / DC module 102 ensures that the control unit 2 obtains an appropriate voltage through voltage regulation. This design realizes the effective power supply for each component and ensures the normal operation of the induction cooker refrigeration system.

[0072] In some embodiments, the control unit 2 can control the on and off of the magnetic field through a switch control signal with a fixed duty cycle (such as a PWM signal) and correspondingly control the opening and closing of the mesh holes 306 of the first heat insulation net 304 and the second heat insulation net 305.

[0073] In some other embodiments, see Figure 1 , the induction cooker refrigeration system further includes a temperature sensor group 6. The temperature sensor group 6 is electrically connected to the control unit 2 and is used to detect the temperatures at the cookware, the magnetic material piece 301, and the heat exhaust opening 312 (thus, the temperature sensor group 6 includes at least one temperature sensor disposed at the first heat insulation net 304, at least one temperature sensor disposed at the magnetic material piece 301, and at least one temperature sensor disposed at the heat exhaust opening 312). The control unit 2 is used to compare the temperatures at the cookware, the magnetic material piece 301, and the heat exhaust opening 312 to control the on / off of the magnetic field and the opening / closing of the mesh holes 306 of the first heat insulation net 304 and the second heat insulation net 305.

[0074] Specifically, when the magnetic material piece 301 enters the heat release stage, the magnetic field is turned on, the mesh holes 306 of the first heat insulation net 304 are closed, and the mesh holes 306 of the second heat insulation net 305 are opened (the heat dissipation device 302 can operate continuously or be turned on at this time). The temperature T2 of the magnetic material piece 301 is compared with the temperature T3 at the heat exhaust opening 312. When T2 drops to T3 or is close to T3 (i.e., T2 drops to T3 + △T, where △T is a preset deviation threshold), it enters the heat absorption stage. Thus, the mesh holes 306 of the second heat insulation net 305 are closed, the mesh holes 306 of the first heat insulation net 304 are opened, the magnetic field is turned off, the temperature T1 of the cookware is compared with the temperature T2 of the magnetic material piece 301. When T2 rises to T1 or is close to T1 (i.e., T2 rises to T1 - △T), or when the duration of the current heat absorption stage reaches a preset time threshold (which can be set according to actual needs), it enters the heat release stage (repeating the operations of the above heat release stage); and so on in a cycle.

[0075] This technical solution solves the problem of accurately controlling the on / off of the magnetic field and the opening / closing of the mesh holes of the heat insulation net by introducing the temperature sensor group 6 and the temperature comparison function of the control unit 2. By detecting the temperatures at the cookware, the magnetic material piece 301, and the heat exhaust opening 312, the control unit 2 can timely grasp the working state of the refrigeration system and decide when to switch between heat absorption and heat release according to the temperature difference. This control method based on actual temperature data can manage the refrigeration process more precisely than the on / off control at fixed time intervals, improving the energy efficiency and refrigeration effect of the system.

[0076] Among them, the temperature sensor can adopt common temperature detection elements such as thermocouples, thermistors, or infrared temperature sensors.

[0077] In some embodiments, see Figure 1, the induction cooker cooling system further includes a display panel 7, which is electrically connected to the DC / DC module 102 and the control unit 2. The DC / DC module 102 is also used to supply power to the display panel 7, and the display panel 7 is used to set the target temperature (and can also be used to display the real-time temperature of the cooking utensils). Thus, during the actual working process, when it is detected that the temperature of the cooking utensils reaches the target temperature, the control unit 2 controls the electromagnetic refrigeration device 3 to stop refrigerating, realizing accurate control of the cooling temperature. The display panel 7 can adopt a touch screen display device or a combination of a display device and input keys.

[0078] In some embodiments, see Figure 1 , the induction cooker cooling system further includes a buzzer 9, which is electrically connected to the control unit 2. The control unit 2 can also be used to send out a sound prompt signal through the buzzer 9 when it is detected that the temperature of the cooking utensils reaches the target temperature; and can also send out a sound warning signal through the buzzer 9 when a system failure is detected.

[0079] In some embodiments, see Figure 1 , the induction cooker cooling system further includes a cooling fan 8, which is electrically connected to the DC / DC module 102 and the control unit 2. The DC / DC module 102 is also used to supply power to the cooling fan 8, and the control unit 2 is also used to control the operation of the cooling fan 8 to dissipate heat from the induction cooker cooling system, thereby preventing the induction cooker cooling system from being unable to work properly due to excessive temperature.

[0080] In a second aspect, the present application also provides an induction cooker, including the aforementioned induction cooker cooling system. Thus, the induction cooker has the function of cooling the cooking utensils.

[0081] In some embodiments, the induction cooker further includes a heating system, which is used to heat the cooking utensils. Thus, the induction cooker has dual functions of heating and cooling, which can meet the needs of users in different situations. It can be used for cooking food and can also quickly cool overheated food, improving the practicality and versatility of the induction cooker. This solution innovatively introduces a refrigeration function into the induction cooker, solving the limitation that traditional induction cookers can only heat but not cool, and providing a more convenient and diverse cooking experience for users.

[0082] Among them, the heating system can be implemented in various ways. For example, the heating system can adopt the traditional electromagnetic induction heating principle, including a heating coil and a high-frequency oscillation circuit. The heating coil generates an alternating magnetic field, and eddy currents are generated at the bottom of the cooking utensil through electromagnetic induction, thereby realizing the heating of the cooking utensil. Another possible implementation is to adopt infrared heating technology. The heating system can include an infrared heating element and a reflector. The infrared rays emitted by the infrared heating element are focused on the bottom of the cooking utensil by the reflector to directly heat the cooking utensil. In addition, the heating system can also adopt a resistance heating element. In this case, the heating system includes a resistance wire and a temperature controller, and heat is generated by controlling the current passing through the resistance wire to heat the cooking utensil.

[0083] Among them, the heating system can be independent of the induction cooker refrigeration system, or can share some components (such as one or more of the power supply circuit 1, the control unit 2, the display panel 7, the cooling fan 8, etc.) with the induction cooker refrigeration system, thereby reducing the structural complexity and cost of the induction cooker.

[0084] In summary, the induction cooker refrigeration system and the induction cooker of the present application use the electromagnetic refrigeration device 3 to cool the cooking utensil, thereby realizing the cooling of the food in the cooking utensil, solving the problem that the traditional induction cooker cannot quickly cool the food, and having the advantages of shortening the food cooling time, improving the dining efficiency, providing more flexible temperature control options, and meeting different cooking needs; and at least having the following advantages:

[0085] 1. It breaks the single application of the traditional induction cooker that only heats and does not cool, and broadens the application direction of the induction cooker;

[0086] 2. When using the electromagnetic refrigeration device 3 and using the fast on-off of the switching tube 401, the refrigeration time can be greatly shortened and the refrigeration efficiency can be improved;

[0087] 3. Electromagnetic refrigeration does not use any environmentally harmful chemical substances, such as freon, ammonia, and hydrocarbons, etc., so it is more environmentally friendly;

[0088] 4. The power consumption of electromagnetic refrigeration is lower, and it has higher energy utilization efficiency;

[0089] 5. Electromagnetic refrigeration does not require a gas compressor, has few moving parts, no vibration, zero noise, high reliability, long life, and is convenient for maintenance;

[0090] 6. Since the magnetic material part 301 is a solid, its entropy density is much greater than that of a gas, so it is easy to be miniaturized and the structural volume can be reduced.

[0091] In this document, relational terms such as first and second are used solely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0092] The above description is only for the embodiments of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An induction cooker refrigeration system, characterized in that: Used for cooling kitchenware, comprising a power supply circuit (1), a control unit (2), an electromagnetic refrigeration device (3) and a switch control circuit (4); The power supply circuit (1) is used to supply power to the control unit (2), the electromagnetic refrigeration device (3) and the switch control circuit (4); The electromagnetic refrigeration device (3) comprises a magnetic material piece (301), a heat dissipation device (302) and an electromagnetic module (303); the electromagnetic module (303) is used to generate an alternately switched on and off magnetic field so that the magnetic material piece (301) generates a magnetocaloric effect and thereby alternately releases and absorbs heat; the heat dissipation device (302) is used to dissipate heat from the magnetic material piece (301) when the magnetic material piece (301) releases heat; and the magnetic material piece (301) is used to absorb heat from kitchenware when absorbing heat; The control unit (2) is electrically connected to the electromagnetic refrigeration device (3), and controls the electromagnetic module (303) to generate an alternating on-off magnetic field through the switch control circuit (4); The electromagnetic module (303) comprises an S magnetic pole and an N magnetic pole which are arranged opposite to each other on two sides of the magnetic material piece (301); when the electromagnetic module (303) is powered on, a magnetic field passing through the magnetic material piece (301) is generated between the S magnetic pole and the N magnetic pole; A first heat-insulating net (304) is arranged on the upper side of the magnetic material piece (301); the first heat-insulating net (304) has a plurality of mesh holes (306), and the mesh holes (306) can be closed and opened; the first heat-insulating net (304) is used to contact kitchen utensils; the mesh holes (306) of the first heat-insulating net (304) are closed when the magnetic material piece (301) releases heat, and are opened when the magnetic material piece (301) absorbs heat; The electromagnetic refrigeration device (3) further comprises a heat-insulating shell (310); the magnetic material piece (301), the heat dissipation device (302) and the electromagnetic module (303) are all arranged in the heat-insulating shell (310); the heat-insulating shell (310) is provided with a heat-absorbing opening (311) and a heat-dissipating opening (312); the first heat-insulating net (304) is arranged at the heat-absorbing opening (311); and the heat dissipation device (302) discharges heat through the heat-dissipating opening (312).

2. The induction cooker refrigeration system according to claim 1, characterized in that: A second heat-insulating net (305) is provided between the heat dissipation device (302) and the magnetic material piece (301); the second heat-insulating net (305) has a plurality of mesh holes (306), and the mesh holes (306) can be closed and opened; The mesh holes (306) of the second heat-insulating net (305) are opened when the magnetic material piece (301) releases heat, and are closed when the magnetic material piece (301) absorbs heat.

3. The induction cooker refrigeration system according to claim 2, characterized in that: The first heat-insulating net (304) and the second heat-insulating net (305) both comprise a fixed net layer (307) having a first mesh hole (3071), a movable net layer (308) having a second mesh hole (3081), and a driving device (309); the fixed net layer (307) and the movable net layer (308) are stacked, and the movable net layer (308) is movable relative to the fixed net layer (307); the driving device (309) is used to drive the movable net layer (308) to move back and forth relative to the fixed net layer (307), so that the second mesh hole (3081) and the first mesh hole (3071) are aligned to achieve the opening of the mesh hole (306), or the second mesh hole (3081) and the first mesh hole (3071) are misaligned to achieve the closing of the mesh hole (306).

4. The induction cooker refrigeration system according to claim 1, characterized in that: The switch control circuit (4) comprises a switch tube (401) and a switch tube drive circuit (402); the switch tube (401), the electromagnetic refrigeration device (3) and the power supply circuit (1) are connected to form a magnetic field control loop; the switch tube drive circuit (402) is connected to the control unit (2), the power supply circuit (1) and the gate of the switch tube (401); the control unit (2) is used to send a switch control signal to the switch tube drive circuit (402); and the switch tube drive circuit (402) is used to control the switching of the switch tube (401) according to the switch control signal.

5. The induction cooker refrigeration system according to claim 4, characterized in that: The power supply circuit (1) comprises an AC / DC module (101), a DC / DC module (102) and a rectifier bridge (103); the switch tube (401), the electromagnetic refrigeration device (3) and the rectifier bridge (103) are connected to form the magnetic field control loop, and the rectifier bridge (103) is used to convert the mains power into direct current; the DC / DC module (102) and the switch tube drive circuit (402) are both electrically connected to the AC / DC module (101), and the DC / DC module (102) is also electrically connected to the control unit (2); the AC / DC module (101) is used to convert the mains power into direct current and supply it to the DC / DC module (102) and the switch tube drive circuit (402); and the DC / DC module (102) is used to regulate the voltage of the direct current provided by the AC / DC module (101) and then supply power to the control unit (2).

6. The induction cooker refrigeration system according to claim 2, characterized in that: The device further comprises a temperature sensor group (6), the temperature sensor group (6) being electrically connected to the control unit (2) and used for detecting the temperature of the kitchenware, the magnetic material piece (301) and the heat exhaust opening (312); the control unit (2) being used for comparing the temperature of the kitchenware, the magnetic material piece (301) and the heat exhaust opening (312) to control the on and off of the magnetic field and the opening and closing of the meshes (306) of the first heat insulation net (304) and the second heat insulation net (305).

7. An induction cooker, characterized in that: The induction cooker refrigeration system comprises the induction cooker refrigeration system according to any one of claims 1 to 6.

8. The induction cooker according to claim 7, characterized in that: Also included is a heating system, which is used to heat the kitchenware.

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