Pan based on ultrasonic-assisted heating, cooking system and method

Abstract

The invention discloses a pan based on ultrasonic-assisted heating, a cooking system and a cooking method.The pan comprises a pan body and a bottom cover detachably and fixedly connected to the bottom face of the pan body, a closed cavity is formed between the pan body and the bottom cover, and an ultrasonic vibrator and a heating coil are fixedly arranged in the closed cavity; a rigid heat insulation layer is arranged between the ultrasonic vibrator and the pot body, and a heat insulation sheath is further arranged on the outer side of the ultrasonic vibrator; the device further comprises a power socket, and the ultrasonic vibrators and the heating coil are electrically connected with the power socket. When the pan works, the ultrasonic vibrator can apply ultrasonic waves to the pan body, so that food in the pan body is evenly heated, the problem of uneven heating is avoided, high-frequency vibration of the ultrasonic waves accelerates heat transfer, cooking time is shortened, cooking efficiency is improved, the food can be rapidly cooked at a low temperature through ultrasonic heating, and the cooking efficiency is improved. And the ultrasonic vibration has a sterilization effect, so that the food safety is favorably improved.

Description

Technical Field

[0001] The invention relates to the field of kitchenware, and in particular to a frying pan, a cooking system and a cooking method based on ultrasonic assisted heating. Background Art

[0002] A frying pan is a cooking utensil with a flat bottom and usually no edges or only low edges. Most existing frying pans do not have a self-heating function, but there are also electric frying pans with a self-heating function, which have an electric heating coil installed inside. When the electric frying pan is used, the heating coil inside the frying pan is heated by the power supply, so that the pan body is heated up and the food in the pan is cooked.

[0003] However, existing electric pans have some disadvantages when used, including uneven heating, long cooking time, and loss of nutrients. Traditional electric pans are prone to uneven heating during cooking, causing the food to be burnt on the outside and undercooked on the inside. Traditional electric pans often take a long time to cook food to the ideal state, which is inefficient. And long-term high-temperature cooking will cause the loss of nutrients in the food.

[0004] Ultrasonic waves are a type of sound wave with a frequency higher than the upper limit of human hearing (about 20 kHz). When propagating in a medium, they can produce thermal, mechanical and cavitation effects. These effects make ultrasonic heating technology widely used in industry, medicine, scientific research and other fields.

[0005] Ultrasonic heating technology is a technology that uses the mechanical vibration generated when ultrasonic waves propagate in a medium to transfer energy.

[0006] In the field of cooking, the main advantage of ultrasonic heating technology is that it can achieve fast and uniform heating while reducing the loss of food nutrients. Traditional cooking methods, such as open flame heating and induction cooker heating, often have problems such as uneven heating, long cooking time, and easy burning of food. Ultrasonic heating technology can effectively solve these problems and improve cooking efficiency and food quality. Summary of the invention

[0007] In view of the problems of uneven heating, long cooking time, loss of food nutrients, etc. in the prior art of traditional frying pans, the purpose of the present invention is to provide a frying pan, a cooking system and a cooking method based on ultrasonic assisted heating, so as to at least partially solve the above problems.

[0008] To achieve the above object, the technical solution of the present invention is: In a first aspect, the present invention provides a frying pan based on ultrasonic assisted heating, comprising a pan body and a bottom cover detachably and fixedly connected to the bottom surface of the pan body, a closed cavity is formed between the pan body and the bottom cover, an ultrasonic vibrator and a heating coil are fixedly arranged in the closed cavity, a rigid insulation layer is provided between the ultrasonic vibrator and the pan body, and an insulation jacket is also provided on the outer side of the ultrasonic vibrator; and also comprises a power socket fixed on the pan body and connected to the closed cavity, and the ultrasonic vibrator and the heating coil are both electrically connected to the power socket.

[0009] In some preferred embodiments, the end of the heat-insulating jacket away from the pot body is configured as a closed structure, and the heat-insulating jacket is detachably fixedly connected to the pot body.

[0010] In some preferred embodiments, one end of the thermal insulation jacket away from the pot body is closed by a detachable thermal insulation plug.

[0011] In some preferred embodiments, the thermal insulation plug is fixed on the bottom cover, and when the bottom cover is connected to the pot body, the thermal insulation plug closes the thermal insulation jacket.

[0012] In some preferred embodiments, when there are more than two ultrasonic vibrators, each ultrasonic vibrator is configured with the rigid thermal insulation pad or each ultrasonic vibrator shares the same rigid thermal insulation pad, and each ultrasonic vibrator is configured with the thermal insulation cover or each ultrasonic vibrator shares the same thermal insulation cover.

[0013] In some preferred embodiments, a heat-conducting plate fixedly connected to the bottom surface of the pot body is further provided in the closed cavity, the heating coil is fixedly connected to the heat-conducting plate, and the heat-conducting plate is provided with an avoidance hole for arranging the ultrasonic vibrator.

[0014] In some preferred embodiments, the bottom cover is made of a heat-insulating material, or a heat-insulating layer made of a heat-insulating material is provided on the inner side and / or the outer side of the bottom cover.

[0015] In a second aspect, the present invention also provides a cooking system, comprising a power interaction module, a processor, an ultrasonic generating module, a heating coil generating module, a power module and the frying pan based on ultrasonic assisted heating as described above, wherein the power interaction module, the processor, the ultrasonic generating module and the heating coil generating module, the power module and the frying pan are electrically connected in sequence; the power interaction module is used to send instructions for starting and ending cooking to the processor, the processor is used to send activation signals and stop signals to the ultrasonic generating module and the heating coil generating module, the ultrasonic generating module and the heating coil generating module are respectively used to generate predetermined alternating current signals, and the power module is used to amplify the alternating current signal and transmit it to the power socket in the frying pan based on ultrasonic assisted heating.

[0016] In some preferred embodiments, the cooking system also includes a base, and the power interaction module, the processor, the ultrasonic generating module, the heating coil generating module and the power module are all installed on the base, and the base is also formed with a supporting surface for supporting the frying pan.

[0017] In a third aspect, the present invention further provides a cooking method based on the cooking system, the method comprising the following steps: In response to the cooking start signal, the power interaction module sends a cooking start instruction to the processor; The processor sends activation signals to the ultrasonic generating module and the heating coil generating module respectively; The ultrasonic wave generating module generates a first alternating current signal for driving the ultrasonic vibrator, and the heating coil generating module generates a second alternating current signal for driving the heating coil; The power module amplifies the first alternating current signal and the second alternating current signal and sends them to the ultrasonic vibrator and the heating coil respectively, so that the ultrasonic vibrator and the heating coil work, thereby heating the pot body and starting cooking; In response to the cooking end signal, the power interaction module sends a cooking end instruction to the processor; The processor sends a stop signal to the ultrasonic wave generating module and the heating coil generating module respectively, so that the ultrasonic wave generating module and the heating coil generating module stop working and the cooking ends.

[0018] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: the frying pan of the present invention is provided with an ultrasonic vibrator, so that when the ultrasonic vibrator is powered on, it will apply ultrasonic vibration to the pan body, so that the food in the pan body is exposed to the ultrasonic wave, and the food can be evenly heated, thus avoiding the problem of uneven heating of traditional frying pans. The high-frequency vibration of the ultrasonic wave accelerates the transfer of heat, thereby shortening the cooking time and improving the cooking efficiency. Ultrasonic heating can cook food quickly at a lower temperature, which helps to reduce the loss of nutrients in food and keep the original flavor of food. Ultrasonic vibration has a certain bactericidal effect, which helps to improve food safety during the cooking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of a frying pan based on ultrasonic assisted heating according to the present invention.

[0020] Figure 2 This is a rear view of a frying pan based on ultrasonic assisted heating according to the present invention with the bottom cover removed.

[0021] Figure 3 For along Figure 1 Section view along line AA.

[0022] Figure 4 For along Figure 2 Sectional view along line BB.

[0023] Figure 5 It is a cross-sectional view with a heat conducting plate.

[0024] Figure 6 for Figure 4 A partial enlarged view of point C in the middle.

[0025] Figure 7 The electrical schematic diagram of a frying pan based on ultrasonic assisted heating according to the present invention.

[0026] Figure 8 The electrical block diagram of a cooking system of the present invention.

[0027] Fig. 9 The figure is a schematic diagram of the structure of a cooking system of the present invention.

[0028] Fig.10 This is a flow chart of the method of embodiment 3 of the present invention.

[0029] In the figure: 1-pot body, 2-bottom cover, 3-handle, 4-heating coil, 5-ultrasonic vibrator, 6-enclosed cavity, 7-heat conducting plate, 8-rigid insulation layer, 9-insulating jacket, 10-plug, 11-power socket, 12-power interaction module, 13-processor, 14-ultrasonic generating module, 15-heating coil generating module, 16-power module, 17-base. DETAILED DESCRIPTION

[0030] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] It should be noted that, in the description of the present invention, the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are descriptions of the structure of the present invention based on the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0032] The "first" and "second" in this technical solution are only used to distinguish the names of the same or similar structures, or corresponding structures with similar functions, and are not an arrangement of the importance of these structures, nor do they have a ranking, comparison of size, or other meanings.

[0033] In addition, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the two structures. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood based on the overall idea of ​​the present invention and the specific context of the present solution.

[0034] Example 1 The embodiment of the present invention provides a pan based on ultrasonic assisted heating, such as Figure 1-4 As shown, it includes a pot body 1, a bottom cover 2, a handle 3, a heating coil 4 and an ultrasonic vibrator 5.

[0035] The pot body 1 is made of stainless steel, but may also be made of other heat-conducting materials, and a surrounding edge is formed on the outer edge of the bottom surface of the pot body 1, thereby forming a groove on the bottom surface of the pot body 1, and the bottom cover 2 is detachably fixedly connected to the notch of the groove, for example, by screws, thereby forming a closed cavity 6 between the pot body 1 and the bottom cover 2.

[0036] The bottom cover 2 is usually made of a heat-insulating material, such as a ceramic plate, which is fixed by screws; or the bottom cover 2 itself can be a stainless steel plate, but a heat-insulating layer made of a heat-insulating material is applied on the inner side and / or the outer side thereof. In this way, the tabletop will not be burned when the frying pan is heated.

[0037] The heating coil 4 and the ultrasonic vibrator 5 are both fixedly arranged in the closed cavity 6. The heating coil 4 is in a spiral disc structure, which is arranged concentrically with the pot body 1 and fixed at a position close to the bottom surface of the pot body 1. For example, the heating coil 4 can be fixed to the bottom surface of the pot body 1 by an arc clamp. Of course, the heat conducting plate 7 can also be fixedly arranged in the closed cavity 6, such as Figure 5 As shown, the heat conducting plate 7 is made of heat conducting material, such as copper or stainless steel, and is fixed to the bottom surface of the pot body 1 by screws. The heat conducting plate 7 is provided with a mounting groove on one side of the bottom surface of the pot body 1, and the heating coil 4 is arranged in the mounting groove. By providing the heat conducting plate 7, on the one hand, the heat conducting area between the pot body 1 can be increased, and on the other hand, the heating coil 4 can be prevented from directly contacting other components. The heat conducting plate 7 is usually annular so as to expose the central part of the pot body 1, and the central hole of the heat conducting plate 7 is used to leave space for installing the ultrasonic vibrator 5.

[0038] The ultrasonic vibrator 5 is fixedly connected to the center of the bottom surface of the pot body 1. Of course, the ultrasonic vibrator 5 can also be fixedly arranged at other positions on the bottom surface of the pot body 1. Correspondingly, a hole for avoiding the ultrasonic vibrator 5 is opened on the heat conducting plate 7. A rigid heat insulation layer 8 is also provided between the ultrasonic vibrator 5 and the pot body 1. Figure 6 As shown, the rigid heat-insulating layer 8 is made of a rigid heat-insulating material, such as ceramics, the ultrasonic vibrator 5 is bonded to the rigid heat-insulating layer 8, and the rigid heat-insulating layer 8 is connected to the bottom surface of the pot body 1 by screws.

[0039] The outer side of the ultrasonic vibrator 5 is also provided with an insulating jacket 9 made of insulating material, one end of the insulating jacket 9 is in a closed structure, and the open end of the insulating jacket 9 can be detachably connected (for example, threadedly connected) to the bottom surface of the pot body 1, or the insulating jacket 9 is threadedly connected to the rigid insulating layer 8 equipped with the ultrasonic vibrator 5, and the ultrasonic vibrator 5 is surrounded by the inside of the insulating jacket 9. At this time, the ultrasonic vibrator 5 is in a state of being enclosed by the insulating jacket 9, and the side wall of the insulating jacket 9 is provided with a threading hole.

[0040] Of course, both ends of the heat insulating jacket 9 can be configured to be open, and the end of the heat insulating jacket 9 away from the pot body 1 can be closed by the bottom cover 2, that is, when the bottom cover 2 is fixed to the bottom surface of the pot body 1, the open end of the heat insulating jacket 9 can be closed by the bottom cover 2, thereby preventing the ultrasonic vibrator 5 from being affected by the heat emitted by the heating coil 4. In order to improve the sealing effect of the bottom cover 2 on the heat insulating jacket 9, a plug 10 for sealing the heat insulating jacket 9 can be provided on the inner surface of the bottom cover 2, such as Figure 6 As shown, the plug 10 is made of insulating material, such as flexible material such as polyurethane foam, which is bonded to the bottom cover 2, and when the bottom cover 2 is connected to the pot body 1, the plug 10 is tightly plugged in the insulating sheath 9, thereby sealing the insulating sheath 9.

[0041] Usually, there are multiple ultrasonic vibrators 5, for example, four, and they are evenly arranged around the center of the pot body 1. Each ultrasonic vibrator 5 can be equipped with a rigid heat insulation layer 8 alone, or the rigid heat insulation layer 8 can be equipped with only a larger size, so that each ultrasonic vibrator 5 is installed on the rigid heat insulation layer 8. Similarly, each ultrasonic vibrator 5 can be equipped with a heat insulation jacket 9 alone; or the heat insulation jacket 9 can be equipped with only a larger size, so that each ultrasonic vibrator 5 is located inside the heat insulation jacket 9 with the larger size.

[0042] The frying pan based on ultrasonic assisted heating in this embodiment also includes a power socket 11. A mounting hole for installing the power socket 11 is opened on the side of the lower part of the pot body 1 facing the user. The mounting hole is connected to the closed cavity 6, and the power socket 11 usually has an insulating shell, and the ultrasonic vibrator 5 and the heating coil 4 are electrically connected to the power socket 11 through cables.

[0043] The frying pan based on ultrasonic assisted heating provided in the embodiment of the present invention is equipped with an ultrasonic generator, which is used to convert the mains electricity into an electrical signal that can drive the ultrasonic vibrator 5 to work. The output end of the ultrasonic generator is integrated in a plug used in conjunction with the power socket 11. At the same time, the plug is also integrated with a cable directly connected to the mains electricity. In this way, when the plug is connected to the power socket 11, the heating coil 4 can be powered by the mains electricity and the ultrasonic vibrator 5 can be powered on. The ultrasonic generator and the heating coil 4 are respectively configured with an ultrasonic switch and a heating switch, such as Figure 7 shown.

[0044] Thus, when the pan based on ultrasonic assisted heating provided by the embodiment of the present invention is used, the ultrasonic vibrator 5 and the heating coil 4 are powered on and work at the same time or separately as needed. Among them, the ultrasonic vibrator 5 can be controlled to be powered on and work by operating the ultrasonic switch, so as to apply ultrasonic vibration to the pot body 1, so that the food in the pot body 1 receives ultrasonic waves, and the food can be evenly heated, avoiding the problem of uneven heating of traditional pans. The high-frequency vibration of ultrasonic waves accelerates the transfer of heat, thereby shortening the cooking time and improving the cooking efficiency. Ultrasonic heating can quickly cook food at a lower temperature, which helps to reduce the loss of food nutrients and keep the original flavor of food. Ultrasonic vibration has a certain bactericidal effect, which helps to improve the food safety during the cooking process. The heating coil 4 can be controlled to be powered on and work by operating the heating switch, and the ultrasonic vibrator 5 can be used in conjunction with the heating coil 4 by operating the ultrasonic switch and the heating switch at the same time, so that the pan of the present invention has the characteristics of traditional cooking and ultrasonic cooking, and can be applied to a variety of cooking methods, such as frying, stir-frying, etc., so as to meet different cooking needs; and it can also be promoted at a lower cost, easy to popularize, and convenient to clean and maintain, suitable for home use.

[0045] The embodiment of the present invention also compares the cooking effects of traditional grilled steak on an iron plate and grilled steak in a pan based on ultrasonic assisted heating, as follows: (1) Conditions for grilling steak on an iron plate: Beef selection: Choose steaks of the same breed and same part, such as sirloin.

[0046] Thickness of steak: about 2.5 cm (1 inch).

[0047] Preheat the iron plate: Preheat the iron plate to 250°C (482°F).

[0048] Cooking time: Cook for about 4-5 minutes per side for medium.

[0049] Oil temperature: Use vegetable oil, and cook until the oil is hot but not smoking.

[0050] Resting Time: After searing, let steak rest at room temperature for 5 minutes to allow the juices to redistribute.

[0051] (2) Based on the above conditions for pan-frying steak: Beef selection: Same varieties and cuts as for the sizzling steak.

[0052] Steak thickness: also 2.5 cm (1 in).

[0053] Preheat the pan: Preheat the pan to 200°C (392°F) as ultrasonic assistance may speed up the cooking process.

[0054] Ultrasonic settings: Set the ultrasonic frequency and power according to the equipment manufacturer's recommendations, such as 40kHz frequency and 200W power.

[0055] Cooking time: Cook for about 3-4 minutes per side for medium.

[0056] Oil Temperature: Use the same vegetable oil and oil temperature.

[0057] Resting time: Also let the steak rest at room temperature for 5 minutes.

[0058] Based on the above cooking conditions, the following is a comparison of the test data of steaks obtained by the two cooking methods: Cooking parameters Grilled steak Pan-frying steak based on ultrasonic assisted heating Shear force (kg / cm) 4.5 3.2 Texture - Hardness 7 out of 10 5 out of 10 Texture - Elasticity 4 out of 10 5 out of 10 doneness Medium Medium Cooking time (min) 4 3 Surface temperature (°C) 200 180 Internal temperature (°C) 55 55 It can be seen that the pan-fried steak based on ultrasonic assisted heating in the embodiment of the present invention not only improves tenderness, but also shows advantages in cooking efficiency and texture improvement. The shortened cooking time and lower surface temperature may help reduce the risk of overcooking and maintain the juiciness and taste of the steak.

[0059] Example 2 An embodiment of the present invention provides a cooking system, including a power interaction module 12, a processor 13, an ultrasonic generating module 14, a heating coil generating module 15, a power module 16, and a frying pan based on ultrasonic assisted heating provided in Example 1.

[0060] like Figure 8 As shown, the output end of the power interaction module 12 is electrically connected to the input end of the processor 13, the output end of the processor 13 is electrically connected to the input end of the ultrasonic generating module 14 and the input end of the heating coil generating module 15, the output end of the ultrasonic generating module 14 and the output end of the heating coil generating module 15 are both electrically connected to the input end of the power module 16, and the output end of the power module 16 is electrically connected to the power socket 11 on the frying pan.

[0061] Among them, the power interaction module 12 is used to send a cooking start instruction to the processor 13. After receiving the cooking start instruction, the processor 13 sends an activation signal to the ultrasonic generator module 14 and the heating coil generator module 15. The ultrasonic generator module 14 and the heating coil generator module 15 are respectively used to generate predetermined AC signals, which are respectively called the first AC signal and the second AC signal. The power module 16 is used to amplify the above AC signals, that is, to amplify the first AC signal and the second AC signal so that they can drive the ultrasonic vibrator 5 and the heating coil 4 respectively. That is, the power module 16 has two submodules, one of which has an input end connected to the output end of the ultrasonic generator module 14 and an output end connected to the ultrasonic vibrator 5, and the other submodule has an input end connected to the output end of the heating coil generator module 15 and an output end connected to the heating coil 4.

[0062] In addition, the power interaction module 12 is also used to send an instruction to the processor 13 to end cooking. After receiving the instruction to end cooking, the processor 13 sends a stop signal to the ultrasonic generating module 14 and the heating coil generating module 15. The ultrasonic generating module 14 and the heating coil generating module 15 stop working, and cooking is ended.

[0063] It is easy to understand that Fig. 9As shown, the cooking system generally further includes a base 17, which is generally made of heat-insulating material. The above-mentioned power interaction module 12, processor 13, ultrasonic generating module 14, heating coil generating module 15 and power module 16 are all installed on the base 17, for example, in the cavity inside the base 17. The base 17 is specifically in a shell-like structure, and a hatch is detachably connected to its bottom surface. Generally, the top surface of the base 17 is also formed with a support surface for supporting a frying pan, so that the frying pan can be placed on the top surface of the base 17 for use. For example, the base 17 is in the shape of a truncated cone or a square cone as a whole, and the support surface at the top is in the shape of a horizontal plane, with a circle of slightly raised retaining rings at the outer edge.

[0064] When the cooking system provided by the embodiment of the present invention is used, the power module 16 is first connected to the power socket 9 on the pot body 1. After the power interaction module 12 detects the power connection and receives the instruction to start cooking, it sends it to the processor 13. The processor 13 sends an activation signal to the ultrasonic generator module 14 and the heating coil generator module 15. The ultrasonic generator module 14 and the heating coil generator module 15 generate a first alternating current signal and a second alternating current signal respectively. The power module 16 amplifies the first alternating current signal and the second alternating current signal so that they can drive the ultrasonic vibrator 5 and the heating coil 4 respectively. The ultrasonic vibrator 5 emits ultrasonic waves to the pot body 1, and the heating coil 4 emits heat, thereby heating the pot body 1 together and starting cooking. When the power module 16 is disconnected from the power socket 9 on the pan, the power interaction module 12 sends an instruction to end cooking to the processor 13, and then the processor 13 sends a stop signal to the ultrasonic generator module 14 and the heating coil generator module 15. The ultrasonic generator module 14 and the heating coil generator module 15 stop working, and cooking ends. Of course, during cooking, the processor 13 may also send an activation signal to only one of the ultrasonic generating module 14 and the heating coil generating module 15, so as to enable only ultrasonic cooking or only conventional cooking.

[0065] Example 3 The embodiment of the present invention provides a cooking method, which is implemented based on the cooking system provided in embodiment 2. Fig.10 As shown, the method comprises the following steps: In response to the cooking start signal, the power interaction module sends a cooking start instruction to the processor; The processor sends activation signals to the ultrasonic generating module and the heating coil generating module respectively; The ultrasonic wave generating module generates a first alternating current signal for driving the ultrasonic vibrator, and the heating coil generating module generates a second alternating current signal for driving the heating coil; The power module amplifies the first alternating current signal and the second alternating current signal and sends them to the ultrasonic vibrator and the heating coil respectively, so that the ultrasonic vibrator and the heating coil work, thereby heating the pot body and starting cooking; In response to the cooking end signal, the power interaction module sends a cooking end instruction to the processor; The processor sends a stop signal to the ultrasonic wave generating module and the heating coil generating module respectively, so that the ultrasonic wave generating module and the heating coil generating module stop working and the cooking ends.

[0066] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A pan based on ultrasonic assisted heating, characterized in that: The invention comprises a pot body and a bottom cover which is detachably fixedly connected to the bottom surface of the pot body, a closed cavity is formed between the pot body and the bottom cover, an ultrasonic vibrator and a heating coil are fixedly arranged in the closed cavity, a rigid heat insulation layer is provided between the ultrasonic vibrator and the pot body, and a heat insulation sheath is also provided on the outer side of the ultrasonic vibrator; and a power socket which is fixed on the pot body and communicated with the closed cavity, and the ultrasonic vibrator and the heating coil are both electrically connected to the power socket.

2. The frying pan according to claim 1, characterized in that: One end of the heat-insulating jacket away from the pot body is configured as a closed structure, and the heat-insulating jacket is detachably fixedly connected to the pot body.

3. The frying pan according to claim 1, characterized in that: One end of the heat-insulating jacket away from the pot body is closed by a detachable heat-insulating plug.

4. The frying pan according to claim 3, characterized in that: The heat-insulating plug is fixed on the bottom cover, and when the bottom cover is connected to the pot body, the heat-insulating plug seals the heat-insulating sheath.

5. The frying pan according to claim 1, characterized in that: When there are more than two ultrasonic vibrators, each ultrasonic vibrator is configured with the rigid thermal insulation pad or each ultrasonic vibrator shares the same rigid thermal insulation pad, and each ultrasonic vibrator is configured with the thermal insulation jacket or each ultrasonic vibrator shares the same thermal insulation jacket.

6. The frying pan according to claim 1, characterized in that: A heat-conducting plate fixedly connected to the bottom surface of the pot body is also provided in the closed cavity, the heating coil is fixedly connected to the heat-conducting plate, and a avoidance hole for arranging the ultrasonic vibrator is opened on the heat-conducting plate.

7. The frying pan according to claim 1, characterized in that: The bottom cover is made of a heat-insulating material, or a heat-insulating layer made of a heat-insulating material is provided on the inner side and / or the outer side of the bottom cover.

8. A cooking system, characterized in that: It comprises a power interaction module, a processor, an ultrasonic generating module, a heating coil generating module, a power module and a frying pan based on ultrasonic assisted heating as described in any one of claims 1 to 7, wherein the power interaction module, the processor, the ultrasonic generating module and the heating coil generating module, the power module and the frying pan are electrically connected in sequence; the power interaction module is used to send cooking start and cooking end instructions to the processor, the processor is used to send activation signals and stop signals to the ultrasonic generating module and the heating coil generating module, the ultrasonic generating module and the heating coil generating module are respectively used to generate predetermined alternating current signals, and the power module is used to amplify the alternating current signals and transmit them to the power socket in the frying pan based on ultrasonic assisted heating.

9. The cooking system according to claim 8, characterized in that: It also includes a base, on which the power interaction module, the processor, the ultrasonic generating module, the heating coil generating module and the power module are all installed. The base is also formed with a supporting surface for supporting the frying pan.

10. A cooking method based on the cooking system according to claim 8 or 9, characterized in that: The method comprises the following steps: In response to the cooking start signal, the power interaction module sends a cooking start instruction to the processor; The processor sends activation signals to the ultrasonic generating module and the heating coil generating module respectively; The ultrasonic wave generating module generates a first alternating current signal for driving the ultrasonic vibrator, and the heating coil generating module generates a second alternating current signal for driving the heating coil; The power module amplifies the first alternating current signal and the second alternating current signal and sends them to the ultrasonic vibrator and the heating coil respectively, so that the ultrasonic vibrator and the heating coil work, thereby heating the pot body and starting cooking; In response to the cooking end signal, the power interaction module sends a cooking end instruction to the processor; The processor sends a stop signal to the ultrasonic wave generating module and the heating coil generating module respectively, so that the ultrasonic wave generating module and the heating coil generating module stop working and the cooking ends.

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