Electric cooker based on ultrasonic-assisted heating and cooking method thereof

Abstract

The invention discloses an electric cooker based on ultrasonic-assisted heating and a cooking method thereof, and belongs to the field of kitchenware, the electric cooker comprises a cooker body and a bottom cover detachably and fixedly connected to the bottom surface of the cooker body, a closed cavity is formed between the cooker body and the bottom cover, and an ultrasonic vibrator and a heating coil are fixedly arranged in the closed cavity; a rigid heat insulation pad 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 electric cooker works, the ultrasonic vibrator can apply ultrasonic waves to the cooker body, food in the cooker body can be 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 the low temperature through ultrasonic heating, and the cooking effect is good. And the ultrasonic vibration has a sterilization effect, so that the food safety is favorably improved.

Description

Technical Field

[0001] The present invention relates to the field of kitchen utensils, and particularly to an electric rice cooker based on ultrasonic-assisted heating and its cooking method. Background Art

[0002] An electric rice cooker is a cooking utensil with a flat bottom and usually no edges or only low edges. Most of the existing electric rice cookers do not have a self-heating function, but there are also electric rice cookers with a self-heating function. Inside, there is an electrically heated coil installed. When in use, connecting the electric rice cooker to the power supply can make the heated coil inside heat up due to electrification, causing the pot body to be heated and warmed up, and then cooking the food inside the pot.

[0003] However, there are some drawbacks when using the existing electric rice cookers, including uneven heating, long cooking time, loss of nutrients, etc. Traditional electric rice cookers are prone to uneven heating during the cooking process, resulting in the outside of the food being burnt while the inside is not cooked. Traditional electric rice cookers often take a long time to cook the food to an ideal state, with low efficiency. And long-time high-temperature cooking will cause the loss of nutrients in the food.

[0004] Ultrasonic wave is a kind of sound wave with a frequency higher than the upper limit of human hearing (about 20 kHz). It can generate thermal effect, mechanical effect and cavitation effect when propagating in a medium. These effects make the ultrasonic heating technology widely used in industrial, medical, scientific research and other fields.

[0005] The 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 advantages of the ultrasonic heating technology are that it can achieve fast and uniform heating, while reducing the loss of nutrients in food. Traditional cooking methods, such as open-fire heating, induction cooker heating, etc., often have problems such as uneven heating, long cooking time, and easy burning of food. The ultrasonic heating technology can effectively solve these problems and improve cooking efficiency and food quality. Summary of the Invention

[0007] Aiming at the problems of uneven heating, long cooking time, and loss of nutrients in food of traditional electric rice cookers in the prior art, the purpose of the present invention is to provide an electric rice cooker based on ultrasonic-assisted heating and its cooking method to at least partially solve the above problems.

[0008] To achieve the above purpose, the technical solution of the present invention is as follows: In a first aspect, the present invention provides an electric rice cooker based on ultrasonic-assisted heating, comprising a pot body and a pot lid. The bottom surface of the pot body is detachably and fixedly connected with a bottom cover, and 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 pad is provided between the ultrasonic vibrator and the pot body, and a heat insulation sheath is further provided outside the ultrasonic vibrator. A power socket communicating with the closed cavity is further installed on the pot body, and both the ultrasonic vibrator and the heating coil are electrically connected to the power socket.

[0009] In some preferred embodiments, one end of the heat insulation sheath away from the pot body is of a closed structure, and the heat insulation sheath is detachably and fixedly connected with the pot body.

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

[0011] In some preferred embodiments, the heat insulation plug is fixed on the bottom cover, and when the bottom cover is connected with the pot body, the heat insulation plug closes the heat insulation sheath.

[0012] In some preferred embodiments, when there are two or more ultrasonic vibrators, each ultrasonic vibrator is provided with the rigid heat insulation pad or all the ultrasonic vibrators share the same rigid heat insulation pad, and each ultrasonic vibrator is provided with the heat insulation sheath or all the ultrasonic vibrators share the same heat insulation sheath.

[0013] In some preferred embodiments, a heat conduction 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 conduction plate, and an avoidance hole for arranging the ultrasonic vibrator is formed in the heat conduction plate.

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

[0015] In some preferred embodiments, it further includes a power interaction module, a processor, an ultrasonic generation module, a heating coil generation module, and a power module; the power interaction module, the processor, the ultrasonic generation module, the heating coil generation module, the power module, and the power socket 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 generation module and the heating coil generation module, the ultrasonic generation module and the heating coil generation module are respectively used to generate alternating current signals, the power module is used to amplify the alternating current signals and then deliver them to the power socket, and the power socket then delivers the amplified alternating current signals to the ultrasonic vibrator and the heating coil respectively.

[0016] In a second aspect, the present invention further provides a cooking method, and the method includes the following steps: In response to a cooking start signal, the power interaction module sends a cooking start instruction to the processor; The processor sends activation signals to the ultrasonic generation module and the heating coil generation module respectively; The ultrasonic generation module generates a first alternating current signal for driving the ultrasonic vibrator, and the heating coil generation 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 then 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 a cooking end signal, the power interaction module sends a cooking end instruction to the processor; The processor sends stop signals to the ultrasonic generation module and the heating coil generation module respectively, so that the ultrasonic generation module and the heating coil generation module stop working and end cooking.

[0017] By adopting the above technical solution, the beneficial effects of the present invention are as follows: Through the setting of the ultrasonic vibrator in the rice cooker of the present invention, when the ultrasonic vibrator is powered on and works, it will apply ultrasonic vibration to the pot body, enabling the food in the pot body to receive ultrasonic waves, which can achieve uniform heating of the food, avoiding the problem of uneven heating in traditional rice cookers. The high-frequency vibration of the ultrasonic waves accelerates the heat transfer, thereby shortening the cooking time and improving the cooking efficiency. Ultrasonic heating can quickly cook food at a relatively low temperature, helping to reduce the loss of food nutrients and maintain the original flavor of the food. The ultrasonic vibration has a certain bactericidal effect, which helps to improve food safety during the cooking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of a rice cooker based on ultrasonic-assisted heating according to the present invention.

[0019] Figure 2 This is a cross-sectional view of an electric rice cooker based on ultrasonic-assisted heating according to the present invention.

[0020] Figure 3 This is another cross-sectional view of an electric rice cooker based on ultrasonic-assisted heating according to the present invention.

[0021] Figure 4 This is a cross-sectional view of an electric rice cooker based on ultrasonic-assisted heating according to the present invention when provided with a heat conduction plate.

[0022] Figure 5 This is a schematic installation diagram of an ultrasonic oscillator in a closed cavity.

[0023] Figure 6 This is an electrical schematic diagram when an electric rice cooker based on ultrasonic-assisted heating according to the present invention is working.

[0024] Figure 7 This is a comparison chart of test results between an electric rice cooker based on ultrasonic-assisted heating according to the present invention and a conventional rice cooker.

[0025] Figure 8 This is an electrical block diagram when an electric rice cooker based on ultrasonic-assisted heating according to Embodiment 2 of the present invention is working.

[0026] Figure 9 This is a schematic structural diagram of an electric rice cooker based on ultrasonic-assisted heating according to Embodiment 2 of the present invention.

[0027] Figure 10 This is a method flow chart of Embodiment 3 of the present invention.

[0028] In the figure: 1 - pot body, 2 - pot lid, 3 - bottom cover, 4 - heating coil, 5 - ultrasonic oscillator, 6 - closed cavity, 7 - heat conduction plate, 8 - rigid heat insulation pad, 9 - heat insulation sheath, 10 - plug, 11 - power socket, 12 - ultrasonic generator, 13 - ultrasonic switch, 14 - heating switch, 15 - power interaction module, 16 - processor, 17 - ultrasonic generation module, 18 - heating coil generation module, 19 - power module, 20 - base. Detailed implementation manners

[0029] The following further describes the detailed implementation manners of the present invention with reference to the accompanying drawings. It should be noted here that the description of these implementation manners is for helping to understand the present invention, but does not constitute a limitation to the present invention. In addition, the technical features involved in the various implementation manners of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is the description of the structure of the present invention based on the drawings shown. It is only for the convenience of describing the present invention simply, 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. Therefore, it should not be construed as a limitation to the present invention.

[0031] For the "first" and "second" in this technical solution, they are only used to distinguish the names of the same or similar structures, or corresponding structures with similar functions, rather than arranging the importance of these structures, nor having an order, or comparing sizes, or other meanings.

[0032] 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two structures. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the general idea of the present invention and in connection with the specific circumstances of this solution.

[0033] Embodiment 1 An embodiment of the present invention provides an electric rice cooker based on ultrasonic-assisted heating, as Figure 1-5 shown, including a pot body 1, a pot lid 2, a bottom cover 3, a heating coil 4, and an ultrasonic vibrator 5.

[0034] The pot body 1 is made of stainless steel material, and of course, it can also be other heat-conducting materials. The top of the pot body 1 is open and is closed by the pot lid 2. A handle is also fixed on the outer wall of the top of the pot body 1. Usually, there are two handles and they are distributed at an interval of 180°. A peripheral edge is formed on the outer edge of the bottom surface of the pot body 1, so as to form a groove on the bottom surface of the pot body 1. The bottom cover 3 is detachably and fixedly connected to the notch of the groove, so as to form a closed cavity 6 between the pot body 1 and the bottom cover 3.

[0035] The bottom cover 3 is made of heat-insulating material, such as a ceramic plate, and is fixedly connected by screws; or the bottom cover 3 itself can be a stainless steel plate, but a heat-insulating layer made of heat-insulating material is laid on its inner side and / or outer side. With such a setting, the electric rice cooker will not burn the tabletop after heating.

[0036] The heating coil 4 and the ultrasonic oscillator 5 are both fixedly arranged in the closed cavity 6. The heating coil 4 has a spiral disc-like structure, which is concentrically arranged with the pot body 1 and is 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 through an arc-shaped clamp. Of course, a heat conducting disc 7 can also be fixedly arranged in the closed cavity 6. The heat conducting disc 7 is made of a heat conducting material, such as copper or stainless steel. The heat conducting disc 7 is fixed to the bottom surface of the pot body 1 by screws. An installation groove is provided on the side of the heat conducting disc 7 facing the bottom surface of the pot body 1, and the heating coil 4 is arranged in this installation groove. In this way, by setting the heat conducting disc 7, on the one hand, the heat conducting area with 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 disc 7 is usually in a ring shape to facilitate exposing the central part of the pot body 1. The central hole of the heat conducting disc 7 is used to leave a space for installing the ultrasonic oscillator 5.

[0037] The ultrasonic oscillator 5 is fixedly connected to the center of the bottom surface of the pot body 1. Of course, the ultrasonic oscillator 5 can also be fixedly arranged at other positions on the bottom surface of the pot body 1. Correspondingly, an avoidance hole for avoiding the ultrasonic oscillator 5 is provided on the heat conducting disc 7. A rigid heat insulation layer 8 is also provided between the ultrasonic oscillator 5 and the pot body 1. The rigid heat insulation layer 8 is made of a rigid heat insulation material, such as ceramics. The ultrasonic oscillator 5 is bonded to the rigid heat insulation layer 8, and the rigid heat insulation layer 8 is connected to the bottom surface of the pot body 1 by screws.

[0038] An insulation sheath 9 made of a heat insulation material is also provided outside the ultrasonic oscillator 5. One end of the insulation sheath 9 has a closed structure. The open end of the insulation sheath 9 is detachably connected (such as threaded connection) to the bottom surface of the pot body 1, or the insulation sheath 9 is threadedly connected to the rigid heat insulation layer 8 equipped with the ultrasonic oscillator 5, and the ultrasonic oscillator 5 is surrounded inside the insulation sheath 9. At this time, the ultrasonic oscillator 5 is in a state of being enclosed by the insulation sheath 9. Correspondingly, a wire passing hole is provided on the side wall of the insulation sheath 9.

[0039] Of course, both ends of the insulation sheath 9 can also be configured to be open, and the end of the insulation sheath 9 far 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 insulation sheath 9 can be closed by the bottom cover 2, so as to prevent the ultrasonic oscillator 5 from being affected by the heat emitted by the heating coil 4. In order to improve the closing effect of the bottom cover 2 on the insulation sheath 9, a plug 10 for closing the insulation sheath 9 can be provided on the inner surface of the bottom cover 2. The plug 10 is made of a heat insulation material, such as a flexible material like polyurethane foam. It 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 into the insulation sheath 9 to close the insulation sheath 9.

[0040] Generally, there are multiple ultrasonic oscillators 5, for example, four, which are circumferentially and uniformly arranged around the center of the pot body 1. Each ultrasonic oscillator 5 can be individually equipped with a rigid heat insulation layer 8, or the rigid heat insulation layer 8 can be only equipped with a larger size so that each ultrasonic oscillator 5 is installed on the rigid heat insulation layer 8. Similarly, each ultrasonic oscillator 5 can be individually equipped with a heat insulation sheath 9; or the heat insulation sheath 9 is only equipped with a larger size so that each ultrasonic oscillator 5 is located inside the heat insulation sheath 9 with a larger size.

[0041] The frying pan based on ultrasonic assisted heating in this embodiment further includes a power socket 11. An installation 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 installation hole communicates with the closed cavity 6, and the power socket 11 generally has a heat insulation shell, and both the ultrasonic oscillator 5 and the heating coil 4 are electrically connected to the power socket 11 through cables.

[0042] The frying pan based on ultrasonic assisted heating provided by the embodiment of the present invention is equipped with an ultrasonic generator 12. The ultrasonic generator 12 is used to convert the commercial power into an electrical signal capable of driving the ultrasonic oscillator 5 to work. The output end of the ultrasonic generator 12 is integrated on the plug used in conjunction with the power socket 11. A heating cable directly connected to the commercial power is also integrated on the plug. Thus, when the plug is connected to the power socket 11, both the heating coil 4 can be powered on to work and the ultrasonic oscillator 5 can be powered on to work. The ultrasonic generator 12 and the heating coil 4 are respectively configured with an ultrasonic switch 13 and a heating switch 14, as Figure 6 shown.

[0043] Thus, when the frying pan based on ultrasonic assisted heating provided by the embodiment of the present invention is in use, the ultrasonic oscillator 5 and the heating coil 4 are powered on to work simultaneously or separately according to needs. Among them, by operating the ultrasonic switch 13, the ultrasonic oscillator 5 can be controlled to be powered on to work, thereby applying ultrasonic vibration to the pot body 1, enabling the food in the pot body 1 to receive ultrasonic waves, realizing uniform heating of the food, avoiding the problem of uneven heating of traditional frying pans. The high-frequency vibration of the ultrasonic waves accelerates the heat transfer, thereby shortening the cooking time and improving the cooking efficiency. Ultrasonic heating can quickly cook food at a lower temperature, helping to reduce the loss of food nutrients and maintain the original flavor of the food. The ultrasonic vibration has a certain sterilization effect, helping to improve food safety during the cooking process. By operating the heating switch 14, the heating coil 4 can be controlled to be powered on to work. By operating the ultrasonic switch 13 and the heating switch 14 simultaneously, the ultrasonic oscillator 5 and the heating coil 4 can be used in cooperation, enabling the frying pan of the present invention to have the characteristics of traditional cooking and ultrasonic cooking, being applicable to various cooking methods such as frying and stir-frying, thus meeting different cooking needs; and it can also be popularized at a lower cost, is easy to popularize, and is convenient for cleaning and maintenance, being suitable for household use.

[0044] To test the effect of the rice cooker with ultrasonic-assisted heating (referred to as the ultrasonic rice cooker) provided by the embodiments of the present invention on the quality of the soup, we made soup with different raw materials (pig's trotters, pork ribs, old hen) according to traditional soup recipes, and compared with the traditional rice cooker to analyze the improvement of the nutritional value of the cooked food by the ultrasonic rice cooker, as reflected by the changes in the total protein, crude fat, total solids content and the relative molecular mass distribution of the protein.

[0045] Chop the raw meat into pieces about (3×3×3) cm, take 350 g of the meat pieces and put them into the pot with cold water. After boiling for 3 min, take them out. After discarding the boiling water in the pot, add 1400 mL of water again. After boiling again, add the processed raw materials, and at the same time add 35 g of other auxiliary materials into the water. After the water boils, turn to low heat and simmer. Take 10 mL of samples at 2 h and 4 h respectively for determination.

[0046] The determination methods for various physical and chemical indexes: for the determination of the total protein content, the Kjeldahl method is used; for the determination of the crude fat content, the Soxhlet extraction method is used; for the determination of the total solids content, the moisture determination method is used; for the relative molecular mass distribution range, high performance liquid chromatography is used for detection. The test results are as Figure 7 shown.

[0047] According to the test results, in the analysis of different types of soups, the ultrasonic rice cooker has significantly improved the mass concentration of total solids, crude fat and total protein compared with the traditional rice cooker. Specifically: through its unique physical action mechanism, the ultrasonic rice cooker effectively improves the dissolution and mass concentration of various nutritional components in the soup. This phenomenon may be related to the cavitation effect caused by ultrasonic waves, which can generate a local high-temperature and high-pressure environment in the liquid, thus accelerating the destruction of the internal structure of the food materials and the release of nutrients.

[0048] In addition, by setting the ultrasonic oscillator 5, it is also possible to use the high-frequency vibration of ultrasonic waves for cleaning when the pot body 1 is cleaned, thereby reducing the cleaning difficulty of hand washing or machine washing.

[0049] Embodiment 2 It further includes a power interaction module 15, a processor 16, an ultrasonic generation module 17, a heating coil generation module 18, a power module 19 and the frying pan with ultrasonic-assisted heating provided in Embodiment 1.

[0050] As Figure 8As shown, the output end of the power interaction module 15 is electrically connected to the input end of the processor 16. The output end of the processor 16 is electrically connected to the input ends of the ultrasonic generating module 17 and the heating coil generating module 18. The output ends of the ultrasonic generating module 17 and the heating coil generating module 18 are both electrically connected to the input end of the power module 19, and the output end of the power module 19 is electrically connected to the power socket 11 on the frying pan.

[0051] Among them, the power interaction module 15 is used to send an instruction to start cooking to the processor 16. After receiving the instruction to start cooking, the processor 16 sends an activation signal to the ultrasonic generating module 17 and the heating coil generating module 18. The ultrasonic generating module 17 and the heating coil generating module 18 are respectively used to generate predetermined alternating current signals, which are respectively called the first alternating current signal and the second alternating current signal. The power module 19 is used to amplify the above-mentioned alternating current signals, that is, to amplify the first alternating current signal and the second alternating current signal so that they can respectively drive the ultrasonic oscillator 5 and the heating coil 4. That is, the power module 19 has two sub-modules. One sub-module has its input end connected to the output end of the ultrasonic generating module 17 and its output end connected to the ultrasonic oscillator 5. The other sub-module has its input end connected to the output end of the heating coil generating module 18 and its output end connected to the heating coil 4.

[0052] In addition, the power interaction module 15 is also used to send an instruction to end cooking to the processor 16. After receiving the instruction to end cooking, the processor 16 sends a stop signal to the ultrasonic generating module 17 and the heating coil generating module 18. The ultrasonic generating module 17 and the heating coil generating module 18 stop working, and the cooking ends.

[0053] It is easy to understand that, as Figure 9 shown, it usually further includes a base 20. The base 20 is usually made of heat-insulating material. The above-mentioned power interaction module 15, processor 16, ultrasonic generating module 17, heating coil generating module 18 and power module 19 are all installed on the base 20, for example, installed in the cavity inside the base 20. The base 20 is specifically in a shell-like structure, and its bottom surface is detachably connected with a hatch cover. Usually, the top surface of the base 20 is also formed with a support surface for supporting the frying pan, so that the frying pan can be placed on the top surface of the base 20 for use. For example, the base 20 is integrally in a frustum shape or a square frustum shape, and the support surface at its top is in a horizontal plane shape, and there is a slightly raised retaining ring at the outer edge. And the above-mentioned ultrasonic switch 13 and heating switch 14 are installed on the base 20 for easy operation.

[0054] When the cooking system provided by the embodiment of the present invention is in use, first connect the power module 19 to the power socket 9 on the pot body 1. After the power interaction module 15 detects the power connection and receives the instruction to start cooking, it sends it to the processor 16. The processor 16 then sends activation signals to the ultrasonic generating module 17 and the heating coil generating module 18. The ultrasonic generating module 17 and the heating coil generating module 18 respectively generate a first alternating current signal and a second alternating current signal. The power module 19 amplifies the first alternating current signal and the second alternating current signal so that they can drive the ultrasonic oscillator 5 and the heating coil 4 respectively. The ultrasonic oscillator 5 emits ultrasonic waves to the pot body 1, and the heating coil 4 generates heat, thereby jointly heating the pot body 1 and starting cooking. When the power module 19 is disconnected from the power socket 9 on the frying pan, the power interaction module 15 sends an instruction to end cooking to the processor 16. Then the processor 16 sends stop signals to the ultrasonic generating module 17 and the heating coil generating module 18, and the ultrasonic generating module 17 and the heating coil generating module 18 stop working, and the cooking ends. Of course, during cooking, the processor 16 can also send activation signals to only one of the ultrasonic generating module 17 and the heating coil generating module 18, so as to enable only ultrasonic cooking or only traditional cooking.

[0055] Embodiment 3 The embodiment of the present invention provides a cooking method, which is implemented based on the rice cooker provided in Embodiment 2, as Figure 10 shown, the method includes 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 generator and the heating coil generating module respectively; The ultrasonic generator generates a first alternating current signal for driving the ultrasonic oscillator, 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 oscillator and the heating coil respectively, so that the ultrasonic oscillator 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 stop signals to the ultrasonic generator and the heating coil generating module respectively, so that the ultrasonic generator and the heating coil generating module stop working and the cooking ends.

[0056] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principles and spirits of the present invention, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present invention.

Claims

1. An electric rice cooker based on ultrasonic assisted heating, comprising a pot body and a pot cover, characterized in that: The bottom surface of the pot body is detachably and fixedly connected to a bottom cover, and 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 thermal insulation pad is provided between the ultrasonic vibrator and the pot body, and a thermal insulation sheath is also provided on the outer side of the ultrasonic vibrator; a power socket connected to the closed cavity is also installed on the pot body, and the ultrasonic vibrator and the heating coil are electrically connected to the power socket.

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

3. The electric rice cooker 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 electric rice cooker 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 electric rice cooker 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 electric rice cooker 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 electric rice cooker 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. The electric rice cooker according to claim 1, characterized in that: It also includes a power interaction module, a processor, an ultrasonic generating module, a heating coil generating module and a power module; the power interaction module, the processor, the ultrasonic generating module and the heating coil generating module, the power module and the power socket 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 alternating current signals, the power module is used to amplify the alternating current signals and transmit them to the power socket, and the power socket transmits the amplified alternating current signals to the ultrasonic vibrator and the heating coil, respectively.

9. A cooking method based on the electric rice cooker according to claim 8, 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.

Images