Control method, microwave cooking appliance and storage medium

Abstract

The present application discloses a control method, a microwave cooking appliance, and a storage medium. The control method is used for a microwave cooking appliance, which includes a cavity, a microwave generating device, and at least two spatial radiation units. The microwave generating device includes at least two radio frequency microwave sources, the spatial radiation units connecting the radio frequency microwave sources and the cavity, and the radio frequency microwave sources emitting microwave radiation into the cavity. The control method includes inputting instructions to select food information and heating effects; obtaining a heating scheme for each stage of the food based on the food information and heating effects, wherein the heating scheme is the microwave energy allocated to each heating stage under a combination of frequency and phase difference in each heating stage; and controlling the operation of the radio frequency microwave source based on the heating scheme for the heating stage. The present application uses a radio frequency microwave source to obtain a food heating scheme based on food information and heating effects, wherein the heating scheme includes microwave energy under a combination of frequency and phase difference, thereby controlling the operation of the radio frequency microwave source and improving the heating uniformity of the food.

Description

Technical Field

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

[0002] Currently, in the microwave oven field, due to the magnetron's inability to control power, frequency, and phase, methods to improve uneven heating in microwave ovens are primarily based on structural optimization, such as adding a turntable and stirring blades, and optimizing the cavity structure design. Microwave control can only be simply adjusted by turning the power on and off.

[0003] However, structural optimization can only target the uniformity of the corresponding recipe considered during design, has a limited scope of application, and the verification process is relatively cumbersome. Simple power on-off control has little effect on improving the actual uniformity of microwave heating. Summary of the Invention

[0004] Embodiments of the present application provide a control method, a microwave cooking appliance, and a storage medium.

[0005] The control method of an embodiment of the present application is applied to a microwave cooking appliance, which includes a cavity, a microwave generating device, and at least two spatial radiation units. The microwave generating device includes at least two radio-frequency microwave sources, and each of the spatial radiation units is connected to a corresponding radio-frequency microwave source and the cavity. Microwaves emitted by the radio-frequency microwave sources are radiated into the cavity via the spatial radiation units.

[0006] The control method includes: selecting food information and a heating effect according to an input instruction; obtaining a heating scheme corresponding to heating the food in each heating stage according to the selected food information and the heating effect, wherein the heating scheme is microwave energy allocated to a combination of a frequency and a phase difference corresponding to each heating stage in each heating stage; and controlling the operation of the radio frequency microwave source according to the heating scheme corresponding to each heating stage.

[0007] In some embodiments, the food information includes food type, shape, and weight.

[0008] In certain embodiments, each heating stage corresponds to a temperature range, and within the same temperature range, the dielectric property fluctuation of the food is within a preset range.

[0009] In some embodiments, the microwave cooking appliance pre-stores a preset heating scheme, as well as a correspondence between the preset heating scheme, preset food information, and preset heating effects. Based on the selected food information and the heating effect, the heating scheme corresponding to heating the food in each heating stage is obtained, including: determining the heating scheme based on the correspondence, the selected food information, and the heating effect.

[0010] In certain embodiments, the control method includes: dividing the food cooking process into multiple heating stages based on the preset food information; heating the food using a combination of set frequencies and phase differences based on the temperature rise requirements and required energy of each heating stage to obtain a preset temperature rise matrix; obtaining the preset heating effect and the corresponding relationship based on the preset heating effect and the preset temperature rise matrix.

[0011] In some embodiments, obtaining the preset heating effect and the corresponding relationship based on the preset heating effect and the preset temperature rise matrix includes: obtaining an effect matrix based on the preset heating effect and the unit matrix; obtaining the preset heating scheme and the corresponding relationship based on the effect matrix and the preset temperature rise matrix.

[0012] In some embodiments, obtaining the preset heating scheme and the corresponding relationship based on the effect matrix and the preset temperature rise matrix includes: obtaining the difference between the preset temperature rise matrix and the effect matrix; solving the minimum value of the difference to obtain the preset heating scheme and the corresponding relationship.

[0013] The microwave cooking appliance according to the embodiments of the present application includes a cavity, a microwave generator, at least two spatial radiation units, and a controller. The microwave generator includes at least two radio frequency microwave sources, each of which is connected to a corresponding radio frequency microwave source and the cavity. The microwaves emitted by the radio frequency microwave sources are radiated into the cavity via the spatial radiation units. The controller is configured to: select food information and a heating effect based on input instructions; obtain a heating scheme corresponding to each heating stage of the food based on the selected food information and heating effect, wherein the heating scheme is the microwave energy allocated to each heating stage at a combination of a frequency and a phase difference corresponding to the heating stage; and control the operation of the radio frequency microwave source according to the heating scheme corresponding to each heating stage.

[0014] In certain embodiments, each heating stage corresponds to a temperature range, and within the same temperature range, the dielectric property fluctuation of the food is within a preset range.

[0015] In some embodiments, the microwave cooking appliance pre-stores a preset heating scheme, as well as a correspondence between the preset heating scheme, preset food information, and preset heating effect. The controller is used to determine the heating scheme based on the correspondence, the selected food information, and the heating effect.

[0016] In certain embodiments, the controller is used to: divide the food cooking process into multiple heating stages based on the preset food information; heat the food using a combination of set frequencies and phase differences based on the temperature rise requirements and required energy of each heating stage to obtain a preset temperature rise matrix; obtain the preset heating effect and the corresponding relationship based on the preset heating effect and the preset temperature rise matrix.

[0017] In certain embodiments, the controller is configured to: obtain an effect matrix based on the preset heating effect and a unit matrix; and obtain the preset heating scheme and the corresponding relationship based on the effect matrix and the preset temperature rise matrix.

[0018] In certain embodiments, the controller is configured to: obtain a difference between the preset temperature rise matrix and the effect matrix; and solve a minimum value of the difference to obtain the preset heating scheme and the corresponding relationship.

[0019] A computer-readable storage medium according to an embodiment of the present application stores a computer program, wherein when the computer program is executed by a processor, the processor executes the control method described in any one of the above embodiments.

[0020] The control method, microwave cooking appliance and storage medium of the embodiments of the present application use a radio frequency microwave source, which can obtain a heating plan for each heating stage of the food based on food information and heating effect. The heating plan may include microwave energy allocated to a combination of frequency and phase difference, thereby controlling the operation of the radio frequency microwave source, thereby improving the heating uniformity of the food.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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:

[0023] Figure 1 It is a flow chart of the control method of the embodiment of the present application;

[0024] Figure 2 is a schematic structural diagram of a microwave cooking appliance according to an embodiment of the present application;

[0025] Figure 3 is a schematic diagram of a module of a microwave cooking appliance according to an embodiment of the present application;

[0026] Figures 4 to 7 It is a flow chart of the control method of the embodiment of the present application. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described in detail below. Implementations of the embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having 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 are not to be construed as limiting the present application.

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

[0029] In the description of the embodiments of the present application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrally connected; they can be mechanically connected, electrically connected, or capable of mutual communication; they can be directly connected, or indirectly connected through an intermediate medium, and they can be internal communication between two elements or an interactive relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0030] See also Figure 1 and Figure 2 Embodiments of the present application provide a control method and a microwave cooking appliance 100. The microwave cooking appliance 100 includes a cavity 10, a microwave generating device 20, and at least two spatial radiation units 30. The microwave generating device 20 includes at least two radio frequency microwave sources 22. Each spatial radiation unit 30 is connected to a corresponding radio frequency microwave source 22 and the cavity 10. The microwaves emitted by the radio frequency microwave source 22 are radiated into the cavity 10 via the spatial radiation units 30.

[0031] Control methods include:

[0032] Step 01: Select food information and heating effect according to the input instructions;

[0033] Step 02: Obtaining a heating plan corresponding to each heating stage of the food based on the selected food information and heating effect, wherein the heating plan includes, in each heating stage, microwave energy allocated to a combination of frequency and phase difference corresponding to the heating stage;

[0034] Step 03: Control the operation of the radio frequency microwave source 22 according to the heating scheme corresponding to each heating stage.

[0035] Specifically, 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, see Figure 3 The microwave cooking appliance 100 includes a controller 40 connected to the microwave generating device 20, the RF microwave source 22, and the spatial radiation unit 30. Steps 01, 02, and 03 can be implemented by the controller 40. Specifically, the controller 40 is configured to: select food information and a heating effect based on input instructions; obtain a heating scheme corresponding to each heating stage of the heated food based on the selected food information and heating effect, wherein the heating scheme includes microwave energy allocated to each heating stage at a combination of a frequency and a phase difference corresponding to the heating stage; and control the operation of the RF microwave source 22 based on the heating scheme corresponding to each heating stage.

[0036] The control method and microwave cooking appliance 100 of the embodiment of the present application use a radio frequency microwave source 22, which can obtain a heating plan for each heating stage of the food based on food information and heating effect. The heating plan may include microwave energy allocated to a combination of frequency and phase difference, thereby controlling the operation of the radio frequency microwave source, thereby improving the heating uniformity of the food.

[0037] Specifically, the microwave cooking appliance 100 may include but is not limited to microwave ovens, microwave ovens, microwave rice cookers and other microwave cooking appliances. Figure 2 and Figure 3The microwave cooking appliance 100 includes two spatial radiation units 30. The microwave generating device 20 includes two RF microwave sources 22. Each spatial radiation unit 30 is connected to a corresponding RF microwave source 22 and the cavity 10. Microwaves emitted by the RF microwave source 22 are radiated into the cavity 10 via the spatial radiation units 30. The RF microwave source 22 can generate microwave signals with specific power, frequency, and phase. When the two microwave signals are simultaneously fed into the cavity, microwave signals with a certain phase difference are formed within the cavity, thereby establishing a corresponding cooking mode. The RF microwave source 22 may include a semiconductor microwave source. The spatial radiation unit 30 may include a slot antenna. A slot antenna is an antenna formed by slots in a conductive surface. A radio frequency electromagnetic field is excited in the slots, and electromagnetic waves are radiated into space. Slot antennas have a number of outstanding advantages, including ease of fabrication, cost-effectiveness, high radiation efficiency, and stable performance. The spatial radiation unit 30 may also include a dipole antenna, which can be used to transmit and receive signals at a fixed frequency. Dipole antennas consist of two conductors and are characterized by simplicity of use, ease of implementation, and excellent performance. In other embodiments, the number of the RF microwave sources 22 may be 3, 4, or more than 4, and the number of the spatial radiation units 30 may also be 3, 4, or more than 4 accordingly.

[0038] In some embodiments, the microwave cooking appliance 100 further includes a microwave transmission system 50, which can be a waveguide, a coaxial cable, or other structure capable of transmitting microwaves. The microwave transmission system 50 can transmit the microwaves generated by the RF microwave source 22 to the spatial radiation unit 30, and the spatial radiation unit 30 can radiate the microwaves transmitted by the microwave transmission system 50 into the cavity 10.

[0039] In certain embodiments, the microwave generator 20 includes a control device 60 connected to the two RF microwave sources 22. The control device 60 can control the RF microwave sources 22 to generate microwave signals with specific power, frequency, and phase according to control instructions. The control device 60 is connected to the controller 40, and the control instructions can be set by the controller based on a program or user input. The control device 60 can change its operating state based on the control instructions, thereby changing the power, frequency, and phase of the microwave signals generated by the RF microwave sources 22. This allows the microwave cooking appliance 100 to vary the microwave energy in real time during the heating process, thereby improving the uniformity of food heating.

[0040] The controller 40 can select food information and a heating effect based on input instructions. In some embodiments, the heating effect can be a user-set temperature. For example, a user can set a temperature of -18°C to thaw a 400g block of beef to -3°C, where -3°C is the heating effect. Based on the selected food information and heating effect, a heating scheme corresponding to each heating stage of the food is obtained. The heating scheme includes allocating microwave energy at a frequency and phase difference combination corresponding to each heating stage in each heating stage. Typically, the microwave cooking appliance 100 can include multiple heating stages during the food heating process. For example, when thawing a 400g block of pork, the thawing process can be divided into three heating stages: -18°C to -5°C, -5°C to 0°C, and 0°C to 10°C. The heating scheme includes allocating microwave energy at a frequency and phase difference combination corresponding to each heating stage in each heating stage. The controller 40 controls the operation of the RF microwave source 22 according to the heating scheme corresponding to each heating stage.

[0041] In another example, heating beef from -18°C for frozen storage to around -3°C for easy handling can be divided into three heating stages: -18°C to -12°C, -12°C to -5°C, and -5°C to -3°C, requiring a total energy of 84kJ. The microwave energies required for the three heating stages are 18kJ, 30kJ, and 36kJ, respectively. The microwave frequency range emitted by the RF microwave source can be 2400MHz to 2500MHz, and the phase difference range can be 0 to 360°. The heating scheme is obtained by experiments and simulations within the above range with steps of 10MHz and 10° phase difference. Specifically, in one embodiment, the frequency can be fixed and experiments can be conducted with a phase difference of 10°. For example, at a frequency of 2400MHz, the microwave phase difference of the two RF microwave sources is 0°, 10°, 20°, ..., 360° for experiments, and a first set of multiple frequency and phase difference combinations is saved. Then, at a frequency of 2410 MHz, experiments were conducted with phase differences of 0°, 10°, 20°, ..., 360°, and a second set of combinations of multiple frequencies and phase differences was saved. This process was repeated until experiments with 2400 MHz to 2500 MHz and 0 to 360° were completed to obtain multiple sets of frequency and phase difference combinations.

[0042] In another embodiment, the phase difference can be fixed and experiments can be conducted with a frequency difference of 10 MHz. For example, with a phase difference of 0°, experiments can be conducted at frequencies of 2400 MHz, 2410 MHz, 2420 MHz, ..., 2500 MHz, saving a first set of multiple frequency and phase difference combinations. Then, with a phase difference of 10°, experiments can be conducted at frequencies of 2400 MHz, 2410 MHz, 2420 MHz, ..., 2500 MHz, saving a second set of multiple frequency and phase difference combinations. This process can be repeated until experiments with frequencies from 2400 MHz to 2500 MHz and from 0° to 360° are completed.

[0043] Among these obtained combinations, the frequency and phase difference combinations for each food heating stage are saved as heating plans for that heating stage. Each heating plan can be stored in the microwave cooking appliance 100. During the heating process, the corresponding heating plan pre-stored in the microwave cooking appliance 100 can be invoked, and the RF microwave source 22 can be controlled according to the heating plan corresponding to each heating stage. It should be noted that the specific step data, frequency, and phase difference described above are provided for the convenience of illustrating the embodiments of this application and should not be construed as limiting this application.

[0044] In some embodiments, the food information includes type, shape, and weight, so that a better heating effect can be provided for the food more accurately.

[0045] Specifically, food types can include cereals and tubers, vegetables and fruits, and animal meat, etc. The food weight can be a weight in grams, such as 50 grams, 100 grams, 200 grams, 300 grams, or 400 grams. The food shape can be divided into shapes such as elongated strips, blocks (such as oblate cylinders), or rectangular parallelepipeds, or other specific shapes, such as beef, pork, or meat paste that can be elongated strips or cylindrical shapes. Specific shapes include chicken wings, chicken legs, whole chickens, whole fish, etc. It should be noted that the examples and specific numerical values ​​given above 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. In addition, in other embodiments, the food information may also include other information.

[0046] Different food information and heating plans can be pre-calibrated and stored. These can be determined by selecting a cooking menu. For example, before cooking, you can choose to defrost 400g of pork or beef. After confirming your selection, select the heating effect to determine the corresponding heating plan.

[0047] In certain embodiments, each heating stage corresponds to a temperature range. Within this temperature range, the dielectric properties of the food fluctuate within a predetermined range. Thus, a heating plan for each heating stage of the food can be derived based on the food information and the heating effect. The heating plan can include allocating microwave energy to a combination of frequency and phase difference, thereby controlling the operation of the RF microwave source and improving the uniformity of food heating.

[0048] Specifically, dielectric properties may refer to the response characteristics of bound charges (charges that can only move within the linear range of the molecule) in the molecules of a substance to an external electric field. In one embodiment, the dielectric properties can be characterized by a dielectric constant, which is a complex number and includes a real part and an imaginary part. The preset range can be that the real part of the dielectric constant varies between plus or minus 5, and the imaginary part of the dielectric constant is between plus or minus 0.1. In this way, within the same temperature range, the dielectric properties of the food will not fluctuate significantly, so that heating for this temperature range can be more targeted. Targeted heating schemes can be adopted for different temperature ranges, and the uniform heating effect of the food is better.

[0049] See also Figure 4 In some embodiments, the microwave cooking appliance 100 pre-stores a preset heating scheme, as well as a correspondence between the preset heating scheme, preset food information, and preset heating effect. Step 02 includes:

[0050] Step 021: Determine a heating plan based on the corresponding relationship, the selected food information and the heating effect.

[0051] The control method of the microwave cooking appliance according to the embodiment of the present application can be implemented by the microwave cooking appliance 100 according to the embodiment of the present application. Specifically, the microwave cooking appliance 100 includes a controller 40, and step 021 can be implemented by the controller 40. In other words, the controller 40 is configured to determine a heating scheme based on the corresponding relationship, the selected food information, and the heating effect.

[0052] Specifically, the microwave cooking appliance 100 has pre-stored preset heating schemes. These schemes may be determined through experiments or simulations and stored in the microwave cooking appliance 100. The microwave cooking appliance 100 also stores a correspondence between the pre-stored heating schemes, preset food information, and preset heating effects. A pre-stored heating scheme may include information about the microwave energy allocated to the food during a specific heating phase, using a frequency and phase difference combination corresponding to that heating phase. In one example, the pre-stored heating scheme 1 in the microwave cooking appliance 100 may include information about the microwave energy required to heat a 400g piece of pork from -12°C to -5°C, using a frequency and phase difference combination. Here, -5°C represents the heating effect, and 400g of pork represents the pre-stored food information. Pre-stored heating scheme 1 corresponds to -5°C and 400g of pork. Based on this correspondence, the user-selected food information, and the heating effect, a heating scheme is determined to ensure that the microwave cooking appliance 100 heats the food quickly and evenly.

[0053] See also Figure 5 In some embodiments, the control method further comprises:

[0054] Step 022: Divide the food cooking process into multiple heating stages according to the preset food information;

[0055] Step 023: Based on the temperature rise requirements and required energy of each heating stage, the food is heated using a combination of set frequencies and phase differences to obtain a preset temperature rise matrix;

[0056] Step 024: Obtain the preset heating effect and the corresponding relationship according to the preset heating effect and the preset temperature rise matrix.

[0057] The control method for a microwave cooking appliance according to an embodiment of the present application can be implemented by the microwave cooking appliance 100 according to an embodiment of the present application. Specifically, the microwave cooking appliance 100 includes a controller 40, and steps 022, 023, and 024 can all be implemented by the controller 40. That is, the controller 40 is configured to: divide the food cooking process into multiple heating stages based on preset food information; heat the food using a combination of a set frequency and phase difference based on the temperature rise requirement and energy required for each heating stage to obtain a preset temperature rise matrix; and obtain a preset heating effect and a corresponding relationship based on the preset heating effect and the preset temperature rise matrix.

[0058] Specifically, based on preset food information, the food cooking process is divided into multiple heating stages, each corresponding to a temperature range. Based on the temperature rise requirements and energy required for each heating stage, the food is heated using a combination of set frequencies and phase differences to obtain a preset temperature rise matrix. The preset temperature rise matrix can be pre-calibrated and stored.

[0059] In some embodiments, the food surface can be divided into m×n regions for representation, and the preset temperature rise matrix is ​​in the form of an m×n matrix. It is understood that the greater the number of regions divided into, the more accurate the calculation results and the more uniform the heating effect, but the computational effort will be relatively large. The specific values ​​of m and n can be determined by actual cooking and are not specifically limited here. In one example, the surface of a 10cm×20cm piece of beef can be divided into 50×100 regions. The preset temperature rise matrix for this piece of beef is a 50×100 matrix, which improves the heating uniformity of the beef while remaining within an acceptable computational effort.

[0060] In an example, assuming that in the i-th heating stage (or within the i-th temperature range), the total energy required for the food to complete the corresponding temperature rise is P, then use the energy P to heat the food one by one according to the existing frequency and phase difference combinations, and record the overall temperature rise matrix T of the corresponding heated food f,φ Data acquisition can be carried out through experiments or simulations or a combination of the two. In the i-th heating stage, it can be considered that the preset temperature rise matrix of the food under the combined action of all frequencies and phase differences is: ΔT i =∑x j ·T f,φ , where f represents frequency, φ represents phase difference, j corresponds to the number of combinations of all frequencies and phase differences, and x j It is the proportion of the energy actually allocated to each frequency and phase difference combination in the total energy P.

[0061] Therefore, in the i-th heating stage, the preset temperature rise matrix can be expressed as ΔT=x1·ΔT1+...+x n ΔT n , x1+...+x n =1, n represents the number of combinations of frequency and phase difference, and the preset heating effect and the corresponding relationship are obtained according to the preset heating effect and the preset temperature rise matrix.

[0062] In one embodiment, the heating effect may represent the temperature reached by the food after heating is completed. The heating effect may also be divided into multiple sub-heating effects according to multiple heating stages, each sub-heating effect being the temperature reached by the food after the heating stage is completed.

[0063] In one example, heating beef from frozen storage at -18°C to a convenient temperature of around -3°C can be divided into three heating stages: -18°C to -12°C, -12°C to -5°C, and -5°C to -3°C. Taking the second heating stage (-12°C to -5°C) as an example, the total energy required to heat the beef from -12°C to -5°C is 30 kJ. The microwave frequency emitted by the RF microwave source 22 can range from 2400 MHz to 2500 MHz, and the phase difference can range from 0 to 360°. Experiments and simulations were conducted within this range using 10 MHz and 10° phase difference steps. The number of frequencies and phase differences in the second heating stage is 11, and the number of phase differences is 37. The total number of possible frequency and phase difference combinations is 11 × 37 = 407.

[0064] In another example, heating beef from frozen storage at -18°C to a convenient temperature of around -3°C can be divided into three heating stages: -18°C to -12°C, -12°C to -5°C, and -5°C to -3°C. Taking the second heating stage, -12°C to -5°C, as an example, the total energy required to heat the beef from -12°C to -5°C is 30 kJ. The microwave frequency emitted by the RF microwave source 22 can range from 2400 MHz to 2500 MHz, and the phase difference can range from 0 to 350°. Experiments and simulations were conducted within this range using 5 MHz and 10° phase difference increments. The number of frequencies and phase differences in the second heating stage is 21, and the number of phase differences is 36. The total number of possible frequency and phase difference combinations is 21 × 36 = 756.

[0065] See also Figure 6 In some embodiments, step 024 includes:

[0066] Step 025: Obtain an effect matrix according to the preset heating effect and the unit matrix;

[0067] Step 026: Obtain the preset heating scheme and corresponding relationship based on the effect matrix and the preset temperature rise matrix.

[0068] The control method of the microwave cooking appliance according to the embodiment of the present application can be implemented by the microwave cooking appliance 100 according to the embodiment of the present application. Specifically, the microwave cooking appliance 100 includes a controller 40, and both steps 025 and 026 can be implemented by the controller 40. In other words, the controller 40 is configured to: calculate an effect matrix using a preset heating effect and a unit matrix; and obtain a preset heating scheme and its corresponding relationship based on the effect matrix and the preset temperature rise matrix.

[0069] Specifically, taking -18℃~-5℃ as an example, the target temperature in this heating stage is -5℃, the initial temperature is -18℃, and the temperature rise is 13℃. That is, the heating effect is that the final temperature of the food can reach -5℃ after the heating stage is completed. The identity matrix is ​​an m×n matrix with all elements being 1. The effect matrix can be obtained by calculating the heating effect and the identity matrix. The effect matrix can be expressed as ΔT p In the above example, the heating effect is that the food reaches -5℃, so the effect matrix ΔT p = Temperature rise value × unit matrix = 13 × unit matrix. The heating scheme and corresponding relationship can be further preset based on the preset temperature rise matrix and effect matrix. It is worth mentioning that the number of unit matrices is the same as the number of preset temperature rise matrices. For example, if the preset temperature rise matrix is ​​a 50×100 matrix, the unit matrix is ​​also a 50×100 matrix.

[0070] After obtaining the preset heating plan, the food information, heating effect and preset heating plan can be associated to form a corresponding relationship and stored.

[0071] See also Figure 7 In some embodiments, step 026 includes:

[0072] Step 027: Obtain the difference between the preset temperature rise matrix and the effect matrix;

[0073] Step 028: Solve for the minimum value of the difference to obtain the preset heating scheme and corresponding relationship.

[0074] The control method of the microwave cooking appliance according to the embodiment of the present application can be implemented by the microwave cooking appliance 100 according to the embodiment of the present application. Specifically, the microwave cooking appliance 100 includes a controller 40, and both steps 027 and 028 can be implemented by the controller 40. In other words, the controller 40 is configured to: obtain the difference between the preset temperature rise matrix and the effect matrix; and solve the minimum value of the difference to obtain the preset heating scheme and the corresponding relationship.

[0075] Specifically, the difference between the preset temperature rise matrix and the effect matrix can be obtained using the formula ΔT-ΔT p Indicates, where ΔT represents the preset temperature rise matrix, ΔT p Represents the effect matrix. The difference can be understood as the difference between the actual temperature rise and the target temperature rise under the current frequency and phase difference combination. If the preset temperature rise matrix is ​​to be as close to the effect matrix as possible, the difference should be as close to 0 as possible. Therefore, the preset heating solution can be obtained by solving the minimum value of the difference. The minimum value of the difference can be solved by the formula f(x1,x2,...,x n )=x1·ΔT1+...+x n ΔT n -ΔT p, x1+...+x n =1. Wherein, ΔT1 represents the preset temperature rise matrix corresponding to the total energy P fed in at the combination of frequency f1 and phase difference φ1, x1 corresponds to a coefficient <1, and so on. In some embodiments, x1, x2, ..., x can be solved by mathematical calculation, software programming open source code, etc. n The corresponding value. When solving x1,x2,...,x n After obtaining the corresponding value, you can set the energy allocated to each frequency and phase difference in this heating stage according to this value.

[0076] In one example, the energy allocation can be achieved by heating time. For example, if x1 corresponds to a frequency f1 and phase difference φ1 combination with a value of 0.3, and x2 corresponds to a frequency f2 and phase difference φ2 combination with a value of 0.2, then during a heating period of time T, the heating time allocated to the frequency f1 and phase difference φ1 combination is 0.3 × T, the heating time allocated to the frequency f2 and phase difference φ2 combination is 0.2 × T, and so on.

[0077] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the processor executes the steps of the control method of any of the above embodiments.

[0078] For example, when the program is executed by a processor, the following steps of the control method are implemented:

[0079] 01: Select food information and heating effect according to input instructions;

[0080] 02: Obtain the heating scheme corresponding to each heating stage of the food based on the selected food information and heating effect. The heating scheme is the microwave energy allocated to the combination of frequency and phase difference corresponding to the heating stage in each heating stage.

[0081] 03: Control the operation of the radio frequency microwave source 22 according to the heating scheme corresponding to each heating stage.

[0082] The non-volatile computer-readable storage medium may be provided in the microwave cooking appliance 100 or in a cloud server. The microwave cooking appliance 100 may communicate with the cloud server to obtain the corresponding program.

[0083] 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 media, USB flash drives, removable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), and software distribution media.

[0084] The controller of a microwave cooking appliance is a single-chip microcomputer that integrates a processor, memory, and communication modules. The processor can refer to the processor contained in the controller. The processor can be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), off-the-shelf programmable gate arrays (FPGAs), other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0085] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0086] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising 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 be performed out of 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 those skilled in the art to which the embodiments of the present application belong.

[0087] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processing module, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, 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 it in another suitable manner if necessary, and then storing it in a computer memory.

[0088] It should be understood that various parts of the embodiments of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0089] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can 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.

[0090] In addition, the functional units in the various embodiments 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 a 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.

[0091] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0092] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are illustrative 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, characterized in that: The microwave cooking appliance comprises: cavity; a microwave generating device, said microwave generating device comprising at least two radio frequency microwave sources; and at least two spatial radiation units, each of which is connected to a corresponding radio frequency microwave source and the cavity, and microwaves emitted by the radio frequency microwave source are radiated into the cavity via the spatial radiation unit; The control method includes: Select food information and heating effect according to input instructions; Obtaining, based on the selected food information and the heating effect, a heating scheme corresponding to each heating stage of the food, wherein the heating scheme includes, in each heating stage, microwave energy allocated to a combination of a frequency and a phase difference corresponding to the heating stage; Controlling the operation of the radio frequency microwave source according to the heating scheme corresponding to each heating stage; The microwave cooking appliance pre-stores a preset heating scheme, as well as a correspondence between the preset heating scheme, preset food information, and preset heating effect. The control method includes: Dividing the food cooking process into multiple heating stages according to the preset food information; According to the temperature rise requirements and required energy of each heating stage, the food is heated using a combination of set frequencies and phase differences to obtain a preset temperature rise matrix; Obtaining the preset heating effect and the corresponding relationship according to the preset heating effect and the preset temperature rise matrix; Obtaining the preset heating effect and the corresponding relationship according to the preset heating effect and the preset temperature rise matrix includes: Obtaining an effect matrix according to the preset heating effect and the unit matrix; Obtaining the preset heating scheme and the corresponding relationship according to the effect matrix and the preset temperature rise matrix; Obtaining the preset heating scheme and the corresponding relationship according to the effect matrix and the preset temperature rise matrix includes: Obtaining a difference between the preset temperature rise matrix and the effect matrix; A minimum value of the difference is solved to obtain the preset heating scheme and the corresponding relationship.

2. The control method according to claim 1, characterized in that: The food information includes food type, shape and weight.

3. The control method according to claim 1, wherein: Each heating stage corresponds to a temperature range, and within the same temperature range, the dielectric property fluctuation of the food is within a preset range.

4. The control method according to claim 1, wherein: Obtaining a heating plan corresponding to each heating stage of the food according to the selected food information and the heating effect, including: The heating scheme is determined according to the corresponding relationship, the selected food information and the heating effect.

5. A microwave cooking appliance, characterized in that: include: cavity; A microwave generating device, wherein the microwave generating device comprises at least two radio frequency microwave sources; at least two spatial radiation units, each of which is connected to a corresponding radio frequency microwave source and the cavity, and microwaves emitted by the radio frequency microwave source are radiated into the cavity via the spatial radiation unit; and a controller, the controller being connected to the radio frequency microwave source and the spatial radiation unit, The controller is used to: Select food information and heating effect according to input instructions; Obtaining, based on the selected food information and the heating effect, a heating scheme corresponding to each heating stage of the food, wherein the heating scheme includes, in each heating stage, microwave energy allocated to a combination of a frequency and a phase difference corresponding to the heating stage; Controlling the operation of the radio frequency microwave source according to the heating scheme corresponding to each heating stage; The microwave cooking appliance pre-stores a preset heating scheme, as well as a correspondence between the preset heating scheme, preset food information, and preset heating effects. The controller is further configured to: Dividing the food cooking process into multiple heating stages according to the preset food information; According to the temperature rise requirements and required energy of each heating stage, the food is heated using a combination of set frequencies and phase differences to obtain a preset temperature rise matrix; Obtaining the preset heating effect and the corresponding relationship according to the preset heating effect and the preset temperature rise matrix; The controller is used to: Obtaining an effect matrix according to the preset heating effect and the unit matrix; Obtaining the preset heating scheme and the corresponding relationship according to the effect matrix and the preset temperature rise matrix; The controller is used to: Obtaining a difference between the preset temperature rise matrix and the effect matrix; A minimum value of the difference is solved to obtain the preset heating scheme and the corresponding relationship.

6. The microwave cooking appliance according to claim 5, characterized in that: Each heating stage corresponds to a temperature range, and within the same temperature range, the dielectric property fluctuation of the food is within a preset range.

7. The microwave cooking appliance according to claim 5, characterized in that: The controller is used to: The heating scheme is determined according to the corresponding relationship, the selected food information and the heating effect.

8. A computer-readable storage medium storing a computer program, wherein: When the computer program is executed by a processor, the processor is enabled to execute the control method according to any one of claims 1 to 4.

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