Microwave cooking appliance and control method and storage medium thereof

Abstract

The present application discloses a microwave cooking appliance and a control method and storage medium thereof. The microwave cooking appliance includes a cavity, at least two radio frequency microwave sources and at least two space radiation units. The radio frequency microwave sources are connected to the corresponding space radiation units, and the microwaves emitted by the radio frequency microwave sources are fed into the cavity through the space radiation units. The control method includes receiving a start heating instruction, a first heating mode controls at least two radio frequency microwave sources to emit microwaves into the cavity to increase the temperature of the entire food; after the first heating mode is completed, a second heating mode controls at least two radio frequency microwave sources to emit microwaves into the cavity to heat the middle area of ​​the food in the cavity, and the first heating mode and the second heating mode include frequency and phase difference. The control method uses at least two radio frequency microwave sources to adjust the frequency and phase difference, and the frequency and phase difference determine the first heating mode and the second heating mode, and the food is heated successively through the first heating mode and the second heating mode to improve the uniform heating effect of the food.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a microwave cooking appliance and a control method and storage medium thereof. Background Art

[0002] Currently, microwave ovens can generate microwaves to heat food. However, microwave heating technology, based on its high efficiency, penetrating heating, and selective heating characteristics, can easily cause uneven heating during the heating of food, affecting the final cooking effect of the food.

[0003] In the related art, the current improvement methods for uneven heating are mainly based on structural optimization in microwave ovens, such as adding turntables and stirring blades, optimizing cavity structure design, etc. However, due to the limitation that the magnetron used in microwave ovens cannot adjust its output power, frequency, and phase, there is basically no corresponding application in the improvement of algorithm control in microwave ovens, and only simple power on-off control adjustment is available.

[0004] However, the improvement of microwave uniformity based on structural optimization is based on the selection of some specific menus at the beginning of the design to judge the optimization effect, and the final uniformity improvement is also for this part of the menu. When cooking food outside the range, it is difficult to guarantee the heating effect. In addition, during the design process, there are a lot of parameter scanning and experimental trial and error steps, which is time-consuming and labor-intensive in the development process.

[0005] The current power on-off control on microwave ovens mainly uses the power off time to ensure heat transfer inside the food so that the overheated points inside will not be too high under the action of continuous power. It has little effect on improving the actual uniformity of microwave heating. Summary of the invention

[0006] Embodiments of the present application provide a microwave cooking appliance, a control method thereof, and a storage medium.

[0007] The microwave cooking appliance of the embodiment of the present application comprises a cavity, at least two radio frequency microwave sources, and at least two spatial radiation units, each of the radio frequency microwave sources is connected to a corresponding one of the spatial radiation units, and the microwaves emitted by the radio frequency microwave sources are fed into the cavity through the spatial radiation units. The control method comprises: upon receiving a heating start instruction, controlling the at least two radio frequency microwave sources to emit microwaves into the cavity in a first heating mode to increase the temperature of the entire food in the cavity; after the first heating mode is completed, controlling the at least two radio frequency microwave sources to emit microwaves into the cavity in a second heating mode to heat the middle area of ​​the food in the cavity, wherein the first heating mode and the second heating mode comprise a combination of frequency and phase difference.

[0008] In some embodiments, the control method includes: after the second heating mode is completed, controlling the at least two RF microwave sources to emit microwaves into the cavity to heat the edge of the food in a third heating mode, wherein the third heating mode includes a combination of frequency and phase difference.

[0009] In some embodiments, the microwave cooking appliance includes multiple heating stages, each heating stage corresponds to a temperature range, each heating stage includes the first heating mode, the second heating mode and the third heating mode, and the control method includes: upon receiving the start heating instruction, determining the temperature range of the food; determining the first heating mode, the second heating mode and the third heating mode of the heating stage according to the temperature range of the food.

[0010] In certain embodiments, the control method includes: after the third heating mode is completed, determining whether a predetermined energy is fed into the cavity; when the predetermined energy is fed into the cavity, determining whether the temperature of the food reaches a preset temperature; when the temperature of the food reaches the preset temperature, controlling the at least two RF microwave sources to be turned off.

[0011] In certain embodiments, the control method includes: when predetermined energy is not fed into the cavity, controlling the at least two RF microwave sources to emit microwaves into the cavity in the first heating mode; and when the temperature of the food does not reach a preset temperature, determining the temperature range of the food.

[0012] The microwave cooking appliance of the embodiment of the present application includes a cavity, at least two radio frequency microwave sources, and at least two spatial radiation units, each of the radio frequency microwave sources is connected to a corresponding one of the spatial radiation units, and the microwaves emitted by the radio frequency microwave sources are fed into the cavity through the spatial radiation units; a controller, the controller is connected to the at least two radio frequency microwave sources, and the controller is used to: upon receiving a start heating instruction, control the at least two radio frequency microwave sources to emit microwaves into the cavity in a first heating mode to increase the temperature of the entire food in the cavity; after the first heating mode is completed, control the at least two radio frequency microwave sources to emit microwaves into the cavity in a second heating mode to heat the middle area of ​​the food in the cavity, wherein the first heating mode and the second heating mode include a combination of frequency and phase difference.

[0013] In some embodiments, the controller is used to: after the second heating mode is completed, control the at least two RF microwave sources to emit microwaves into the cavity to heat the edge of the food in a third heating mode, wherein the third heating mode includes a combination of frequency and phase difference.

[0014] In some embodiments, the microwave cooking appliance includes multiple heating stages, each heating stage corresponds to a temperature range, each heating stage includes the first heating mode, the second heating mode and the third heating mode, and the controller is used to: determine the temperature range of the food when receiving the start heating instruction; determine the first heating mode, the second heating mode and the third heating mode of the heating stage according to the temperature range of the food.

[0015] In certain embodiments, the controller is used to: determine whether a predetermined amount of energy is fed into the cavity after the third heating mode is completed; determine whether the temperature of the food reaches a preset temperature when the predetermined amount of energy is fed into the cavity; and control the at least two RF microwave sources to be turned off when the temperature of the food reaches the preset temperature.

[0016] In certain embodiments, the controller is used to: control the at least two RF microwave sources to emit microwaves into the cavity in the first heating mode when predetermined energy is not fed into the cavity; and determine the temperature range of the food when the temperature of the food does not reach a preset temperature.

[0017] A non-volatile computer-readable storage medium containing a computer program according to an embodiment of the present application implements the control method described in any of the above embodiments when the computer program is executed by one or more processors.

[0018] The microwave cooking appliance and its control method and storage medium in the embodiments of the present application utilize a radio frequency microwave source to emit microwaves to heat food. At least two radio frequency microwave sources can adjust the frequency and phase difference, so that a first heating mode and a second heating mode can be determined based on the frequency and phase difference, and food can be heated successively through the first heating mode and the second heating mode, which can improve the uniform heating effect of food.

[0019] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is a flow chart of a control method according to an embodiment of the present application;

[0022] Figure 2 is a schematic structural diagram of a microwave cooking appliance according to an embodiment of the present application;

[0023] Figure 3 is a schematic diagram of a module of a microwave cooking appliance according to an embodiment of the present application;

[0024] Figure 4 It is a flow chart of a control method according to an embodiment of the present application;

[0025] Figure 5 is a schematic diagram of a heating mode scenario in an embodiment of the present application;

[0026] Figures 6 to 8 It is a flow chart of the control method of the implementation mode of the present application. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described in detail below, and the embodiments of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0028] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the description of the implementation methods of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the implementation methods of the present application can be understood according to specific circumstances.

[0030] See also Figure 1 and Figure 2The control method of the microwave cooking appliance of the embodiment of the present application can be implemented by the microwave cooking appliance 100 of the embodiment of the present application. The microwave cooking appliance 100 includes a cavity 10, at least two radio frequency microwave sources 12, and at least two space radiation units 14. Each radio frequency microwave source 12 is connected to a corresponding space radiation unit 14. The microwaves emitted by the radio frequency microwave source 12 are fed into the cavity 10 through the space radiation unit 14. The control method includes:

[0031] 012: When receiving the instruction to start heating, controlling at least two RF microwave sources 12 to emit microwaves into the cavity 10 in a first heating mode to increase the temperature of the entire food in the cavity 10;

[0032] 014: After the first heating mode is completed, at least two RF microwave sources 12 are controlled to emit microwaves into the cavity 10 in a second heating mode to heat the middle area of ​​the food in the cavity 10, wherein the first heating mode and the second heating mode include a combination of frequency and phase difference.

[0033] The control method of the embodiment of the present application can be implemented by the microwave cooking appliance 100 of the embodiment of the present application. Figure 2 The microwave cooking appliance 100 further includes a controller 16, which is connected to at least two RF microwave sources 12. The controller 16 is used to control the at least two RF microwave sources 12 to emit microwaves into the cavity 10 in a first heating mode to increase the temperature of the entire food in the cavity 10 when receiving a heating start instruction; after the first heating mode is completed, the at least two RF microwave sources 12 are controlled to emit microwaves into the cavity 10 in a second heating mode to heat the middle area of ​​the food in the cavity 10, wherein the first heating mode and the second heating mode include a combination of frequency and phase difference.

[0034] The control method of the microwave cooking appliance 100 and the microwave cooking appliance 100 of the embodiment of the present application utilize a radio frequency microwave source 12 to emit microwaves to heat food. At least two radio frequency microwave sources 12 can adjust the frequency and phase difference, so that a first heating mode and a second heating mode can be determined based on the frequency and phase difference, and food can be heated successively through the first heating mode and the second heating mode, which can improve the uniform heating effect of food.

[0035] The microwave cooking appliance 100 may include a microwave oven, a microwave oven, a microwave rice cooker, and the like.

[0036] Specifically, please combine Figure 2 and Figure 3 The microwave cooking appliance 100 includes a cavity 10 and at least two radio frequency microwave sources 12. In a first heating mode, the radio frequency microwave source 12 can emit microwaves into the cavity 10 to increase the temperature of the entire food in the cavity 10. Figure 2In the embodiment, the microwave cooking appliance 100 includes two radio frequency microwave sources 12, which can generate microwave signals with specific power, frequency, and phase difference. The radio frequency microwave source 12 may include a semiconductor microwave source, which can generate microwave signals with stable power, frequency, and phase difference. Figure 2 In the embodiment, the microwave cooking appliance 100 further includes two space radiation units 14. The space radiation unit 14 may include a slot antenna. The slot antenna is an antenna formed by a slot on a conductor surface. A radio frequency electromagnetic field is excited on the slot and electromagnetic waves are radiated into space. The slot antenna has a series of outstanding advantages such as easy processing, economical cost, high radiation efficiency and stable performance. The space radiation unit 14 may also include a dipole antenna. The dipole antenna can be used to transmit and receive signals of a fixed frequency. The dipole antenna is composed of two conductors. The dipole antenna has the characteristics of simple use, easy implementation and good effect. Each radio frequency microwave source 12 is connected to a corresponding space radiation unit 14. The space radiation unit 14 can feed the microwaves generated by the radio frequency microwave source 12 into the cavity 10 to increase the temperature of the food in the cavity 10. Please refer to Figure 3 In some embodiments, the microwave cooking appliance 100 includes a microwave transmission system 13, which may be a waveguide, a coaxial cable, or other structure capable of transmitting microwaves. The microwave transmission system 13 may transmit the microwaves generated by the RF microwave source 12 to the space radiation unit 14, and the space radiation unit 14 may feed the microwaves transmitted by the microwave transmission system 13 into the cavity 10.

[0037] The microwave cooking appliance 100 of the embodiment of the present application takes two RF microwave sources 12 and two space radiation units 14 corresponding to the two RF microwave sources 12 as an example. In other embodiments, the number of RF microwave sources 12 can be 3, 4 or more than 4, and the number of space radiation units 14 can also correspond to 3, 4 or more than 4.

[0038] The control method of the microwave cooking appliance of the embodiment of the present application can be implemented by the microwave cooking appliance 100 of the embodiment of the present application, and the microwave cooking appliance 100 includes a first heating mode and a second heating mode, and the first heating mode and the second heating mode have different combinations of frequencies and phase differences. The first heating mode can be an even-mode heating mode, which can raise the temperature of the entire food to be heated; the second heating mode can be an odd-mode heating mode, which can focus on heating the central area of ​​the food.

[0039] In this way, the first heating mode and the second heating mode are determined based on the combination of frequency and phase difference, and the food is heated successively by the first heating mode and the second heating mode, which can improve the uniform heating effect of the food.

[0040] See also Figure 4 In some embodiments, the control method comprises:

[0041] 016: After the second heating mode is completed, at least two RF microwave sources 12 are controlled to emit microwaves into the cavity 10 in a third heating mode to heat the edge of the food, wherein the third heating mode includes a combination of frequency and phase difference.

[0042] The control method of the microwave cooking appliance 100 of the embodiment of the present application can be implemented by the microwave cooking appliance 100 of the embodiment of the present application. Specifically, the controller 16 is used to control at least two RF microwave sources 12 to emit microwaves into the cavity 10 in a third heating mode to heat the edge of the food after the second heating mode is completed.

[0043] See also Figure 5 , Figure 5 Specifically, the microwave cooking appliance 100 can use a third heating mode to heat the edge of the food after the first heating mode and the second heating mode are completed. The third heating mode can be an edge heating mode, which can be used to supplement the temperature.

[0044] Thus, after the second heating mode is completed, controlling at least two RF microwave sources 12 to emit microwaves into the cavity 10 to heat the edge of the food in the third heating mode can supplement the temperature of the edge of the food and improve the uniform heating effect of the food.

[0045] In one example, the microwave frequency range emitted by the radio frequency microwave source may be 2400MHz to 2500MHz, and the phase difference range may be 0 to 360°. The corresponding first heating mode, second heating mode and third heating mode are obtained by experiment and simulation in the range with a step of 10MHz and a phase difference of 10°. Specifically, in one embodiment, the frequency may be fixed first and the experiment may be conducted with a phase difference of 10°. For example, at a frequency of 2400MHz, the microwave phase difference of the two radio frequency microwave sources may be 0°, 10°, 20°, ..., 360° for experiment, and the first combination of multiple frequencies and phase differences is saved. Then, at a frequency of 2410MHz, the phase difference may be 0°, 10°, 20°, ..., 360° for experiment, and the second combination of multiple frequencies and phase differences is saved, and so on, until the experiment of 2400MHz to 2500MHz and 0 to 360° is completed.

[0046] In another embodiment, the phase difference may be fixed and the experiment may be performed with a frequency difference of 10 MHz. For example, at a phase difference of 0°, the frequencies are 2400 MHz, 2410 MHz, 2420 MHz, ..., 2500 MHz, and the first combination of multiple frequencies and phase differences is saved. Then, at a phase difference of 10°, the frequencies are 2400 MHz, 2410 MHz, 2420 MHz, ..., 2500 MHz, and the second combination of multiple frequencies and phase differences is saved, and so on, until the experiment of 2400 MHz to 2500 MHz and 0 to 360° is completed.

[0047] Among the obtained combinations, the combination for raising the temperature of the entire food is selected as the heating data of the first heating mode, the combination for heating the middle area of ​​the food is selected as the heating data of the second heating mode, and the combination for heating the edge of the food is selected as the heating data of the third heating mode, and stored in the microwave cooking appliance.

[0048] It should be pointed out that the above-mentioned specific step data, frequency and phase difference are for the convenience of explaining the implementation mode of the present application and should not be understood as limiting the present application.

[0049] See also Figure 6 In some embodiments, the microwave cooking appliance 100 includes a plurality of heating stages, each heating stage corresponds to a temperature range, each heating stage includes a first heating mode, a second heating mode and a third heating mode, and the control method includes:

[0050] 022: upon receiving a start heating instruction, determining a temperature range of the food;

[0051] 024: Determine the first heating mode, the second heating mode and the third heating mode in the heating stage according to the temperature range of the food.

[0052] The control method of the microwave cooking appliance 100 of the embodiment of the present application can be implemented by the microwave cooking appliance 100 of the embodiment of the present application. In some embodiments, the microwave cooking appliance 100 includes multiple heating stages, each heating stage corresponds to a temperature range, and each heating stage includes a first heating mode, a second heating mode, and a third heating mode. Specifically, the controller 16 is used to determine the temperature range of the food when receiving a start heating instruction; determine the first heating mode, the second heating mode, and the third heating mode of the heating stage according to the temperature range of the food.

[0053] Specifically, the microwave cooking appliance 100 determines the temperature range of the food when receiving the instruction to start heating. In one example, the temperature range of the food can be determined by touching the surface of the food with an optical fiber to detect the temperature of the food, or by inserting the optical fiber into the food to detect the temperature of the food, or by touching the surface of the food with an optical fiber to detect the temperature of the food and inserting the optical fiber into the food to detect the temperature of the food and then performing a weighted average, or by detecting the temperature of the food by infrared rays. The temperature range of the food can be determined based on the temperature of the food. The food can have multiple temperature ranges, and the division of multiple temperature ranges can obtain the number of specific temperature ranges and specific data of the temperature ranges by simulation or experiment.

[0054] In one example, a microwave cooking appliance 100 can be used to heat and defrost 500 g of beef cubes. The initial temperature of the 500 g beef cubes can be -18°C, and the defrosting of the 500 g beef cubes can be divided into three heating stages, namely, a first heating stage, a second heating stage, and a third heating stage. The three heating stages correspond to three temperature ranges, which can be -18°C to -7°C, -7°C to 5°C, and above 5°C. The temperature ranges can be calibrated by simulation or experiment. The three temperature points of -18°C, -7°C, and 5°C can be selected to obtain the combination of the frequency and phase difference of the first heating mode, the combination of the frequency and phase difference of the second heating mode, and the combination of the frequency and phase difference of the third heating mode corresponding to each temperature point through a pre-simulation or experiment. It is worth mentioning that in the first heating stage, the first-level power can be used to defrost the beef. The first-level power has the characteristics of high power and high energy output per unit time. It can quickly heat up the beef as a whole when it is at a low temperature to shorten the thawing time of the beef; in the second heating stage, the second-level power can be used to defrost the beef. The second-level power is less than the first-level power. The second-level power can be half or one-third of the first-level power. Because the temperature range corresponding to the second heating stage is -7℃~5℃, when the beef is in the temperature range of about 0℃, small power is required to gradually increase the temperature. Otherwise, excessive power and high temperature will cause the temperature of the beef to exceed the thawing range; in the third heating stage, the third-level power can be used to defrost the beef. The third-level power can be 1.2 times or 1.5 times of the second-level power. The power is increased in the third heating stage to shorten the thawing time of the beef.

[0055] It should be noted that the above examples and specific numerical values ​​are for the convenience of explaining the implementation of the present application and should not be construed as limiting the scope of protection of the present application.

[0056] See also Figure 7 In some embodiments, the control method comprises:

[0057] 032: After the third heating mode is completed, determining whether a predetermined energy is fed into the cavity 10;

[0058] 034: When a predetermined energy is fed into the cavity 10, determining whether the temperature of the food reaches a preset temperature;

[0059] 036: When the temperature of the food reaches a preset temperature, at least two RF microwave sources 12 are controlled to be turned off.

[0060] The control method of the microwave cooking appliance 100 of the embodiment of the present application can be implemented by the microwave cooking appliance 100 of the embodiment of the present application. The controller 16 is used to determine whether a predetermined energy is fed into the cavity 10 after the third heating mode is completed; when the predetermined energy is fed into the cavity 10, determine whether the temperature of the food reaches a preset temperature; when the temperature of the food reaches the preset temperature, control at least two RF microwave sources 12 to turn off.

[0061] Please refer again Figure 3 In some embodiments, the microwave cooking appliance 100 includes a detection device 15, which can be used to receive thermal signals and electrical signals in the cavity 10. The detection device 15 can use infrared temperature measurement technology to receive thermal signals in the cavity 10. The infrared temperature measurement technology can convert radiation energy into electrical signals, and judge whether the cavity 10 is fed with predetermined energy according to the size of the converted electrical signals. The detection device 15 can also be used to receive electrical signals in the cavity 10. The detection device 15 can be implemented by a space radiation unit 14. The space radiation unit 14 can receive information on microwave power and efficiency changes reflected from the cavity 10, and judge whether the cavity 10 is fed with predetermined energy according to the information on microwave power and efficiency changes reflected from the cavity 10. When the predetermined energy is fed into the cavity 10, it is judged whether the temperature of the food reaches the preset temperature. Optical fiber can be used to determine whether the temperature of the food has reached the preset temperature. Specifically, the optical fiber can be used to touch the surface of the food to detect the temperature of the food, and then determine whether the temperature of the food has reached the preset temperature; the optical fiber can also be inserted into the food to detect the temperature of the food, and then determine whether the temperature of the food has reached the preset temperature; the optical fiber can also be used to touch the surface of the food to detect the temperature of the food and the optical fiber can be inserted into the food to detect the temperature of the food and then perform weighted average to determine whether the temperature of the food has reached the preset temperature. It is worth mentioning that each heating stage will produce a certain temperature deviation, and a temperature difference range can be set. Within the temperature difference range, it can be considered that the temperature of the food has reached the preset temperature. In an example, the maximum temperature difference between the temperature of the food and the preset temperature after heating is completed can be within 8°C, that is, the temperature of the food after heating is completed is equal to or less than 8°C, then it can be determined that the temperature of the food has reached the preset temperature; the temperature of the food after heating is completed is greater than 8°C, then it can be determined that the temperature of the food has not reached the preset temperature. When the temperature of the food reaches the preset temperature, at least two RF microwave sources 12 are controlled to be turned off.

[0062] See also Figure 8 In some embodiments, the control method comprises:

[0063] 042: When the predetermined energy is not fed into the cavity 10, at least two radio frequency microwave sources 12 are controlled to emit microwaves into the cavity 10 in a first heating mode;

[0064] 044: Determine the temperature range of food when the temperature of the food does not reach the preset temperature.

[0065] The control method of the microwave cooking appliance 100 of the embodiment of the present application can be implemented by the microwave cooking appliance 100 of the embodiment of the present application. The controller 16 is used to control at least two radio frequency microwave sources 12 to emit microwaves into the cavity 10 in a first heating mode when the predetermined energy is not fed into the cavity 10; and to determine the temperature range of the food when the temperature of the food does not reach the preset temperature.

[0066] Specifically, when the predetermined energy is not fed into the cavity 10, it can be considered that the current heating stage has not been completed, therefore, at least two RF microwave sources 12 are controlled to emit microwaves into the cavity 10 in the first heating mode, and then the RF microwave sources are controlled to emit microwaves in the second heating mode and the third heating mode, so that the predetermined energy is fed into the cavity 10. When the temperature of the food does not reach the preset temperature, it can be considered that the food has not yet completed cooking in all heating stages, therefore, the temperature range of the food can be determined, and then the heating stage can be determined, and the first heating mode, the second heating mode and the third heating mode can be selected according to the heating stage to improve the uniform heating effect of the food.

[0067] The embodiments of the present application also provide a non-volatile computer-readable storage medium containing a computer program, which implements the steps of any of the above control methods when the computer program is executed by one or more processors.

[0068] For example, when the program is executed by a processor, the following steps of the control method are implemented:

[0069] 012: When receiving the instruction to start heating, controlling at least two RF microwave sources 12 to emit microwaves into the cavity 10 in a first heating mode to increase the temperature of the entire food in the cavity 10;

[0070] 014: After the first heating mode is completed, at least two RF microwave sources 12 are controlled to emit microwaves into the cavity 10 in a second heating mode to heat the middle area of ​​the food in the cavity 10, wherein the first heating mode and the second heating mode include a combination of frequency and phase difference.

[0071] The non-volatile computer-readable storage medium may be provided in the microwave cooking appliance or in a cloud server, and the microwave cooking appliance may communicate with the cloud server to obtain a corresponding program.

[0072] It is understood that a computer program includes computer program code. The computer program code may be in source code form, object code form, executable file or some intermediate form. Computer readable storage media may include: any entity or device capable of carrying computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), and software distribution medium.

[0073] The controller of a microwave cooking appliance is a single-chip microcomputer chip that integrates a processor, a memory, a communication module, etc. The processor may refer to the processor contained in the controller. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0075] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0076] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processing module, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0077] It should be understood that the various parts of the embodiments of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0078] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0079] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0080] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0081] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above implementation methods within the scope of the present application.

Claims

1. A control method for a microwave cooking appliance, It is characterized in that The microwave cooking appliance comprises: Cavity; at least two radio frequency microwave sources; at least two space radiation units, each of the radio frequency microwave sources is connected to a corresponding one of the space radiation units, and the microwaves emitted by the radio frequency microwave source are fed into the cavity through the space radiation unit; The control method comprises: When receiving a heating start instruction, controlling the at least two radio frequency microwave sources to emit microwaves into the cavity in a first heating mode to increase the temperature of the entire food in the cavity; After the first heating mode is completed, the at least two radio frequency microwave sources are controlled to emit microwaves into the cavity in a second heating mode to heat a middle area of ​​the food in the cavity. wherein the first heating mode and the second heating mode include a combination of frequency and phase difference; The first heating mode is an even-mode heating mode, and the second heating mode is an odd-mode heating mode. The first heating mode and the second heating mode have different combinations of frequencies and phase differences.

2. The control method of a microwave cooking appliance according to claim 1, It is characterized in that The control method comprises: After the second heating mode is completed, the at least two radio frequency microwave sources are controlled to emit microwaves into the cavity in a third heating mode to heat the edge of the food. Wherein, the third heating mode includes a combination of frequency and phase difference.

3. The control method of a microwave cooking appliance according to claim 2, It is characterized in that The microwave cooking appliance comprises a plurality of heating stages, each of the heating stages corresponds to a temperature range, each of the heating stages comprises the first heating mode, the second heating mode and the third heating mode, and the control method comprises: Upon receiving the instruction to start heating, determining the temperature range of the food; The first heating mode, the second heating mode and the third heating mode of the heating stage are determined according to the temperature range of the food.

4. The control method of a microwave cooking appliance according to claim 3, It is characterized in that The control method comprises: After the third heating mode is completed, determining whether a predetermined energy is fed into the cavity; When a predetermined amount of energy is fed into the cavity, determining whether the temperature of the food reaches a preset temperature; When the temperature of the food reaches a preset temperature, the at least two radio frequency microwave sources are controlled to be turned off.

5. The control method of a microwave cooking appliance according to claim 4, It is characterized in that The control method comprises: When predetermined energy is not fed into the cavity, controlling the at least two radio frequency microwave sources to emit microwaves into the cavity in the first heating mode; When the temperature of the food does not reach the preset temperature, the temperature range of the food is determined.

6. A microwave cooking appliance, It is characterized in that include: Cavity; at least two radio frequency microwave sources; at least two space radiation units, each of the radio frequency microwave sources is connected to a corresponding one of the space radiation units, and the microwaves emitted by the radio frequency microwave source are fed into the cavity through the space radiation unit; a controller connected to the at least two radio frequency microwave sources, The controller is used to: When receiving a heating start instruction, controlling the at least two radio frequency microwave sources to emit microwaves into the cavity in a first heating mode to increase the temperature of the entire food in the cavity; After the first heating mode is completed, the at least two radio frequency microwave sources are controlled to emit microwaves into the cavity in a second heating mode to heat a middle area of ​​the food in the cavity. wherein the first heating mode and the second heating mode include a combination of frequency and phase difference; The first heating mode is an even-mode heating mode, and the second heating mode is an odd-mode heating mode. The first heating mode and the second heating mode have different combinations of frequencies and phase differences.

7. The microwave cooking appliance according to claim 6, It is characterized in that The controller is used to: After the second heating mode is completed, the at least two radio frequency microwave sources are controlled to emit microwaves into the cavity in a third heating mode to heat the edge of the food. Wherein, the third heating mode includes a combination of frequency and phase difference.

8. The microwave cooking appliance according to claim 7, It is characterized in that The microwave cooking appliance comprises a plurality of heating stages, each of the heating stages corresponds to a temperature range, each of the heating stages comprises the first heating mode, the second heating mode and the third heating mode, The controller is used to: Upon receiving the instruction to start heating, determining the temperature range of the food; The first heating mode, the second heating mode and the third heating mode of the heating stage are determined according to the temperature range of the food.

9. The microwave cooking appliance according to claim 8, It is characterized in that The controller is used to: After the third heating mode is completed, determining whether a predetermined energy is fed into the cavity; When a predetermined amount of energy is fed into the cavity, determining whether the temperature of the food reaches a preset temperature; When the temperature of the food reaches a preset temperature, the at least two radio frequency microwave sources are controlled to be turned off.

10. The microwave cooking appliance according to claim 9, It is characterized in that The controller is used to: When predetermined energy is not fed into the cavity, controlling the at least two radio frequency microwave sources to emit microwaves into the cavity in the first heating mode; When the temperature of the food does not reach the preset temperature, the temperature range of the food is determined.

11. A non-volatile computer-readable storage medium containing a computer program, It is characterized in that When the computer program is executed by one or more processors, the control method according to any one of claims 1 to 5 is implemented.

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