Microwave zoned heating method, controller and cooking apparatus

Abstract

Embodiments of the present application provide a microwave partition heating method, a controller and a cooking device. The method comprises: a controller of the cooking device periodically obtaining microwave absorption rates of different frequency values in a preset frequency range of each region in the cavity during a cooking process. The controller can combine the preset maximum heating power of the device and the microwave absorption rates to calculate the heating frequency and heating power of each region. Furthermore, based on the heating frequency and heating power, the controller controls the microwave heating antenna. The method is used to improve the heating flexibility in the cooking process.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of microwave heating, in particular to a microwave partition heating method, a controller and a cooking device. BACKGROUND

[0002] With the development of microwave heating technology, more and more cooking devices such as microwave steaming and baking all-in-one machines and microwave ovens can heat food through microwaves.

[0003] At present, the cooking device can heat food according to the heating time and heating power preset by the user after the food is placed in the cavity, thereby realizing the heating or cooking of the food.

[0004] However, this way cannot dynamically adjust the food, and there is a problem of poor cooking flexibility. SUMMARY

[0005] The microwave partition heating method, the controller and the cooking device provided by the embodiments of the present application can improve the cooking flexibility.

[0006] In a first aspect, the embodiments of the present application provide a microwave partition heating method applied to a cooking device, the cavity of the cooking device comprising a plurality of regions for placing food, each region corresponding to a microwave heating antenna, comprising:

[0007] During cooking, periodically acquire the microwave absorption rate corresponding to different frequency values in a preset frequency range for each region;

[0008] According to the maximum heating power preset by the cooking device and the microwave absorption rate in the current period, determine the heating frequency and heating power of each region in the current period;

[0009] Control the microwave heating antenna of each region to heat according to the heating frequency and the heating power in the current period.

[0010] In an example, acquiring the microwave absorption rate corresponding to different frequency values in a preset frequency range for each region comprises:

[0011] According to a preset frequency interval, generate a plurality of to-be-tested frequency values in the preset frequency range;

[0012] Acquire the microwave absorption rate of the microwave heating antenna of each region when heating using each to-be-tested frequency value in a low-power mode.

[0013] In an example, acquiring the microwave absorption rate of the microwave heating antenna of each region when heating using each to-be-tested frequency value in a low-power mode comprises:

[0014] According to the preset order of each region, sequentially control the microwave heating antenna of each region to heat using the to-be-tested frequency value, to obtain the microwave absorption rate corresponding to each to-be-tested frequency value of each region.

[0015] In an example, the microwave absorption rate of the microwave heating antenna of each region when heating using each to-be-tested frequency value in the low-power mode is obtained, including:

[0016] The emission energy and the reception energy of the microwave heating antenna when heating using each to-be-tested frequency value are obtained.

[0017] The energy difference between the emission energy and the reception energy is determined, and the microwave absorption rate is determined according to the ratio of the energy difference to the emission energy.

[0018] In an example, the heating frequency and the heating power of each region in the current period are determined according to the maximum heating power preset by the cooking device and the microwave absorption rate in the current period, including:

[0019] The maximum absorption rate and the minimum absorption rate corresponding to each region are determined according to the microwave absorption rate corresponding to each to-be-tested frequency value of each region in the current period.

[0020] The heating frequency of the region in the current period is determined according to the to-be-tested frequency value corresponding to the maximum absorption rate of the region.

[0021] The heating power of each region in the current period is determined according to the maximum heating power, the maximum absorption rate and the minimum absorption rate of the region in the current period.

[0022] In an example, the heating power of each region in the current period is determined according to the maximum heating power, the maximum absorption rate and the minimum absorption rate of the region in the current period, including:

[0023] The power weight is determined according to the maximum absorption rate of the region in the first period, and the maximum absorption rate and the minimum absorption rate of the region in the current period.

[0024] The heating power of the region in the current period is determined according to the maximum heating power and the power weight.

[0025] In an example, the power weight is determined according to the maximum absorption rate of the region in the first period, and the maximum absorption rate and the minimum absorption rate of the region in the current period, including:

[0026] A first parameter is determined according to the difference between the maximum absorption rate and the minimum absorption rate of the region in the current period.

[0027] determining a second parameter according to a difference between a maximum absorption rate of the region in a first cycle and the minimum absorption rate of the region in a current cycle;

[0028] determining the power weight according to a ratio of the first parameter and the second parameter.

[0029] In an example, the method comprises:

[0030] determining a cycle length according to a heating optimization degree selected by a user; the cycle length representing a length of time during which the cooking device determines the heating frequency and the heating power of each of the regions and uses the heating frequency and the heating power to heat.

[0031] In an example, before obtaining the microwave absorption rate corresponding to each of the different frequency values in the preset frequency range of each of the regions, the method further comprises:

[0032] determining whether the region is placed with food;

[0033] if the region is not placed with food, turning off the microwave heating antenna of the region.

[0034] In a second aspect, an embodiment of the present application provides a microwave partition heating device applied to a cooking device, the cooking device comprising a plurality of regions for placing food in a cavity of the cooking device, each of the regions being provided with a microwave heating antenna, and the microwave partition heating device comprising:

[0035] an obtaining module configured to periodically obtain a microwave absorption rate corresponding to each of different frequency values in a preset frequency range of each of the regions during a cooking process;

[0036] a processing module configured to determine a heating frequency and a heating power of each of the regions in a current cycle according to a maximum heating power preset by the cooking device and the microwave absorption rate in the current cycle, and control the microwave heating antenna of each of the regions to heat according to the heating frequency and the heating power in the current cycle.

[0037] In an example, the obtaining module is configured to:

[0038] generate a plurality of to-be-tested frequency values in the preset frequency range according to a preset frequency interval;

[0039] obtain a microwave absorption rate of the microwave heating antenna of each of the regions when heating using each of the to-be-tested frequency values in a low-power mode.

[0040] In an example, the obtaining module is configured to:

[0041] According to the preset order of each region, sequentially control the microwave heating antenna of each region to heat using the to-be-tested frequency value, to obtain the microwave absorption rate corresponding to each to-be-tested frequency value of each region.

[0042] In an example, the obtaining module is configured to:

[0043] obtain the transmitting energy and the receiving energy of the microwave heating antenna when heating using each to-be-tested frequency value;

[0044] determine an energy difference value of the transmitting energy and the receiving energy, and determine the microwave absorption rate according to a ratio of the energy difference value to the transmitting energy.

[0045] In an example, the processing module is configured to:

[0046] determine the maximum absorption rate and the minimum absorption rate of each region according to the microwave absorption rate corresponding to each to-be-tested frequency value of each region in a current period;

[0047] determine the heating frequency of each region in the current period according to the to-be-tested frequency value corresponding to the maximum absorption rate of each region;

[0048] determine the heating power of each region in the current period according to the maximum heating power, the maximum absorption rate and the minimum absorption rate of each region in the current period.

[0049] In an example, the processing module is configured to:

[0050] determine a power weight according to the maximum absorption rate of each region in a first period, and the maximum absorption rate and the minimum absorption rate of each region in a current period;

[0051] determine the heating power of each region in the current period according to the maximum heating power and the power weight.

[0052] In an example, the processing module is configured to:

[0053] determine a first parameter according to the difference between the maximum absorption rate and the minimum absorption rate of each region in the current period;

[0054] determine a second parameter according to the difference between the maximum absorption rate of each region in the first period and the minimum absorption rate of each region in the current period;

[0055] determine the power weight according to the ratio of the first parameter to the second parameter.

[0056] In an example, the obtaining module is configured to:

[0057] determine a cycle length according to the heating optimization degree selected by the user; the cycle length represents a length of time during which the cooking device determines the heating frequency and the heating power of each of the zones and uses the heating frequency and the heating power to heat.

[0058] In an example, the obtaining module is configured to:

[0059] determine whether the zone is placed with food;

[0060] if the zone is not placed with food, turn off the microwave heating antenna of the zone.

[0061] In a third aspect, the embodiments of the present application provide a controller, comprising: a memory, a processor;

[0062] the memory stores computer execution instructions;

[0063] the processor executes the computer execution instructions stored in the memory, so that the processor executes the first aspect and / or various possible implementation manners of the first aspect.

[0064] In a fourth aspect, the embodiments of the present application provide a cooking device, comprising: a microwave solid-state source, a plurality of coaxial cables, a plurality of microwave heating antennas, a cavity, and a controller as described in the third aspect and / or various possible implementation manners of the third aspect.

[0065] the microwave solid-state source is arranged on an outer top surface of the cavity; the microwave heating antennas are connected to the microwave solid-state source through the coaxial cables; and the microwave solid-state source is connected to the controller.

[0066] a plurality of through holes are arranged on the top surface of the cavity; and the microwave heating antennas are fixed to the top surface of the cavity through the through holes.

[0067] In a fifth aspect, the embodiments of the present application provide a computer readable storage medium, wherein the computer readable storage medium stores computer execution instructions, and the computer execution instructions are executed by a processor to implement the first aspect and / or various possible implementation manners of the first aspect.

[0068] In a sixth aspect, the embodiments of the present application provide a computer program product, comprising a computer program, and the computer program is executed by a processor to implement the first aspect and / or various possible implementation manners of the first aspect.

[0069] The microwave partition heating method, the controller and the cooking equipment provided by the embodiments of the present application periodically acquire the microwave absorption rate corresponding to different frequency values in a preset frequency range of each region in the cavity during the cooking process; the heating frequency and the heating power of each region are calculated by combining the preset maximum heating power of the equipment and the microwave absorption rate; the control of the microwave heating antenna is realized based on the heating frequency and the heating power, and the heating flexibility during the cooking process is improved. BRIEF DESCRIPTION OF DRAWINGS

[0070] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0071] Figure 1 A top view of the cooking equipment provided by the present application;

[0072] Figure 2 A schematic view of the internal structure of the cavity of the cooking equipment provided by the present application;

[0073] Figure 3 A schematic view of the region division of the cavity provided by the present application;

[0074] Figure 4 A flowchart of the microwave partition heating method provided by the present application Figure 1 ;

[0075] Figure 5a A schematic view of the microwave absorption rate provided by the present application;

[0076] Figure 5b A schematic view of the microwave absorption rate provided by the present application;

[0077] Figure 5c A schematic view of the microwave absorption rate provided by the present application;

[0078] Figure 5d A schematic view of the microwave absorption rate provided by the present application;

[0079] Figure 5e A schematic view of the microwave absorption rate provided by the present application;

[0080] Figure 5f A schematic view of the microwave absorption rate provided by the present application;

[0081] Figure 6 A flowchart of the microwave partition heating method provided by the present application Figure 2 ;

[0082] Figure 7 A schematic view of the structure of the microwave partition heating device provided by the present application;

[0083] Figure 8A structural schematic diagram of a controller provided in the present application.

[0084] Reference signs

[0085] 100 - cooking apparatus; 101 - microwave solid-state source; 102 - coaxial cable; 103 - microwave heating antenna; 104 - cavity. DETAILED DESCRIPTION

[0086] The exemplary embodiments will be described in detail herein with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail because they would obscure the application in unnecessary detail. The following exemplary embodiments are described with reference to the drawings, wherein like reference numerals represent like elements throughout the several figures.

[0087] In the field of cooking apparatuses, microwave heating is widely used as an efficient cooking method, especially in multifunctional apparatuses such as microwave-steam-bake all-in-one machines. Traditional cooking apparatuses, taking the microwave-steam-bake all-in-one machine as an example, usually generate microwave oscillation through a magnetron to achieve rapid heating. However, the energy output mode is relatively fixed, and lacks the ability to dynamically adjust according to the characteristics of the food materials.

[0088] Specifically, different food materials have significantly different requirements for heating methods: vegetable food materials need short-time high-temperature rapid heating to maintain a crisp and tender taste and nutritional ingredients, while meat food materials need to be heated gradually to ensure uniform internal doneness. However, the microwave heating component of traditional apparatuses can only output a single power or a preset program, and cannot automatically adjust the energy output according to the type, quantity, and real-time state (such as surface temperature and moisture content) of the food materials. This fixed mode of heating often leads to quality problems such as overcooked soft vegetables and charred meat, and has poor cooking flexibility, which seriously affects the cooking effect and user experience.

[0089] To this end, the microwave partition heating method provided in the present application utilizes the adjustable frequency and adjustable power characteristics of solid-state microwave sources to place food materials with different energy requirements in different zones and provide precise energy supply for heating different zone food materials, ensuring that different types of food materials are cooked at the same time.

[0090] The controller of the cooking apparatus in the present application first monitors the microwave absorption rate of food placed in different zones at different microwave frequencies by single-channel alternating frequency sweeping to determine the microwave frequency with the maximum absorption rate corresponding to different foods. Since the microwave frequency with the maximum absorption rate corresponding to different foods is different, the heating frequency of the microwave channel corresponding to different zones may be different. Subsequently, the controller can control each zone to heat at the determined microwave frequency and maximum heating power.

[0091] As the heating process increases, the relative content of the internal ingredients of the food changes. The controller dynamically adjusts the heating frequency and heating power by periodically monitoring the microwave absorption rate of the food at different microwave frequencies to achieve precise heating of different areas of the food. This dynamic frequency and power allocation method not only improves the heating efficiency, but also ensures the best cooking state of the simultaneous ripening of different foods, significantly improving the user experience.

[0092] In the above process, the controller can also divide the entire cooking process into multiple cycles as needed and adjust the heating power and heating frequency of each cycle. Among them, the first cycle can be heated at the maximum heating power.

[0093] And because the heating frequency of different areas is different in the above process, there is no phase difference and crosstalk problem, ensuring energy transmission in each area.

[0094] Figure 1 A top view of the cooking device provided in the present application is shown in Figure 2 A schematic view of the internal structure of the cavity of the cooking device is shown in Figure 3 A schematic view of the division of the areas inside the cavity is shown in Figures 1 to 3 Based on the embodiment shown, the cooking device 100 can include a microwave solid-state source 101, a coaxial cable 102, a microwave heating antenna 103, and a cavity 104.

[0095] The microwave solid-state source 101 is arranged on the outer top surface of the cavity 104. The microwave heating antenna 103 is connected to the microwave solid-state source 101 through the coaxial cable 102. The top surface of the cavity 104 is provided with a plurality of through holes, and the microwave heating antenna 103 is fixed to the top surface of the cavity 104 through the through holes.

[0096] The cavity 104 is provided with a baking rack inside, and the food placement area can be arranged on the baking rack. The baking rack can be provided with color, pattern, grid, and other partitioning indications. Food can be placed in the area. For example, as shown in Figure 3 When there are two areas, the positions of the two areas on the baking rack can be as shown by the black solid line frame. In addition, the food placed in the two areas can be as shown by the diagonal shading.

[0097] A microwave heating antenna 103 can be arranged directly above each area. For example, when there are two microwave heating antennas 103, the microwave radiation range of the two microwave heating antennas 103 for heating the food in the two areas can be as shown in Figure 3

[0098] ​The cooking device 100 can further comprise a controller. The controller can be connected with the microwave solid-state source 101, and used to control the microwave solid-state source 101 to control the microwave heating antenna 103 in each region to heat according to the heating frequency and heating power of each region.

[0099] In an example, the controller can comprise a data acquisition module, a data calculation module, a data storage module, and a result feedback module. The data acquisition module is used to acquire relevant data such as the reflected power value of the microwave solid-state source 101. The data calculation module is used to analyze the acquired data. For example, if the reflected power is large, the food absorbs less microwave, and vice versa. The data storage module is used to store the acquired data and the intermediate data of the calculation. The result feedback module is used to feed back the calculated result to the microwave solid-state source 101, so as to realize the control of the microwave solid-state source 101.

[0100] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific examples. The following specific examples can be combined with each other, and the same or similar concepts or processes can not be described again in some examples. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0101] Figure 4 Flowchart of the microwave partition heating method provided by the present application Figure 1 , applied to Figures 1 to 3 the cooking device as shown in Figure 4 , the method comprises:

[0102] S201, during the cooking process, periodically acquiring the microwave absorption rate corresponding to different frequency values in a preset frequency range of each region.

[0103] For example, during the operation of the cooking device, the controller can acquire the microwave absorption rate corresponding to different frequency values in a preset frequency range of the microwave heating antenna of each region by starting a single-channel low-power alternate frequency sweeping mode.

[0104] In an example, the cavity of the cooking device can comprise a plurality of regions. For example, the number of regions can be 2, 4, 6, 8, etc. The user can place food in one or more regions as needed. Each region can correspond to a microwave heating antenna.

[0105] In an example, the regions are arranged based on not wasting the internal space of the cavity. And when the regions are arranged, the shape of each region is kept in proportion to the shape of the microwave heating antenna as much as possible, so as to ensure the heating effect of the food in the region.

[0106] In one example, the controller can sequentially control the microwave heating antennas in each region to perform frequency sweeps according to a preset order. This sequential execution method can avoid frequency interference between microwave heating antennas in different regions, thus preventing inaccurate detection results.

[0107] In another example, the controller can preset different frequency values ​​within a frequency range to control the microwave heating antennas in each area to perform synchronous frequency sweeping. This synchronous execution method can effectively shorten the frequency sweeping time and minimize interference between different frequencies.

[0108] In one example, the preset frequency range can be determined based on the solid-state microwave source. Alternatively, the preset frequency range can be set based on the expected cooking requirements of the cooking device. Or, the preset frequency range can be determined based on the cooking program currently being executed by the cooking device.

[0109] For example, the preset frequency range can be 900-930MHz, 2400-2500MHz, 5725-5875MHz, etc.

[0110] In one example, the frequency values ​​within the preset frequency range can be multiple frequency values ​​within the preset frequency range obtained according to a preset frequency interval.

[0111] For example, the preset frequency interval can be 1MHz, 1.5MHz, 2MHz, etc.

[0112] For example, when the preset frequency range is 900-930MHz and the preset frequency interval is 1MHz, the controller can obtain 31 frequency values ​​of 900, 901, ..., 930 within the 900-930MHz range.

[0113] In one example, the acquisition period for the microwave absorption rate can be determined based on the heating optimization level selected by the user. As the heating process progresses, the relative content of the internal components of the food changes; therefore, the microwave absorption rate of the food varies at different times during the cooking process, and the required heating power also varies.

[0114] For example, such as Figures 5a to 5f As shown, when two microwave heating antennas are included, these two microwave heating antennas can be denoted as antenna A and antenna B, respectively. The microwave absorptivity curves obtained by sweeping within the preset frequency range for periods one, twelve, and forty are not the same.

[0115] Therefore, selecting this cycle allows the cooking program to optimize the heating effect according to user needs. Generally, more cycles result in better heating of the ingredients during the cooking process, leading to better cooking results and an improved user experience.

[0116] In each cycle, the controller can determine the heating frequency and the heating power of each region, and use the heating frequency and the heating power to heat.

[0117] In an example, the cooking apparatus can be provided with multiple heating optimization levels. The controller can determine the cycle length according to the user-selected level. Different levels can correspond to different cycle lengths. The cycle length corresponding to a high heating level is shorter than the cycle length corresponding to a low heating level.

[0118] For example, when there are two levels, high and low, the heating cycle corresponding to the high level can be 30 seconds, and the heating cycle corresponding to the low level can be 10 seconds.

[0119] In another example, the cooking apparatus can obtain the number of cycles set by the user. For example, when the user inputs a cycle number of 30 and the cooking duration of the current cooking program is 45 minutes, the duration of each cycle can be 1.5 minutes.

[0120] S202, according to the maximum heating power preset by the cooking apparatus and the microwave absorption rate in the current cycle, determine the heating frequency and the heating power of each region in the current cycle.

[0121] For example, the controller can obtain the maximum heating power preset by the cooking apparatus. The controller can be preconfigured with a mathematical model for calculating the heating frequency and the heating power. The controller can use the mathematical model to determine the heating frequency and the heating power of each region in the current cycle according to the microwave absorption rate corresponding to different frequency values within the preset frequency range in the current cycle and the maximum heating power.

[0122] In an example, the controller can determine the frequency value corresponding to the maximum microwave absorption rate in the current cycle as the heating frequency of each region in the current cycle according to the microwave absorption rate corresponding to different frequency values within the preset frequency range in the current cycle.

[0123] In an example, in the first cycle, the controller can use the maximum heating power to heat the food, so as to ensure that the food can be quickly cooked.

[0124] In an example, in other cycles, the controller can determine the power weight of the heating power using the relationship between the heating frequency and the heating frequency of the first cycle, and determine the heating power of the current cycle according to the power weight and the maximum heating power.

[0125] S203, control the microwave heating antenna of each region to heat according to the heating frequency and the heating power in the current cycle.

[0126] Exemplarily, the controller transmits the calculated heating frequency and heating power to the microwave solid-state source through a high-speed communication bus. The microwave solid-state source controls the microwave heating antennas of each region to heat in the period according to the heating frequency and heating power.

[0127] In this example, by periodically obtaining the microwave absorption rates of each region in the cavity at different frequency values in the preset frequency range during the cooking process, and combining the preset maximum heating power of the device to calculate the heating frequency and heating power of each region, the means for controlling the microwave heating antennas realizes the dynamic adjustment of the heating power and heating frequency of each region during the cooking process, ensures the partition heating of different regions of food materials, and the periodic optimization of different periods, improves the cooking effect, and makes different types of food materials reach the user's expectation at the same time.

[0128] In an example, the specific obtaining process of the microwave absorption rate in step S201 can include:

[0129] S2011, generate a plurality of to-be-measured frequency values in the preset frequency range according to the preset frequency interval.

[0130] Exemplarily, the frequency interval can be preset in the controller. The controller can generate a frequency value sequence in the frequency range according to the frequency interval. The frequency values in the frequency value sequence are the to-be-measured frequency values.

[0131] For example, when the preset frequency range is 900-930MHz and the preset frequency interval is 1MHz, the sequence of to-be-measured frequency values in the range of 900-930MHz obtained by the controller can be [900, 901, …, 930].

[0132] S2012, obtain the microwave absorption rate of each region of the microwave heating antenna when using each to-be-measured frequency value for heating in the low-power mode.

[0133] Exemplarily, the controller can control the microwave heating antenna to sweep frequency according to the sequence of to-be-measured frequency values.

[0134] In an example, the sweep frequency can be performed in the low-power mode to reduce energy consumption.

[0135] In an example, the controller can control the microwave heating antenna of each region to sweep frequency according to the to-be-measured frequency value to obtain the microwave absorption rate corresponding to each to-be-measured frequency value.

[0136] In this example, by generating a plurality of to-be-measured frequency values according to the preset frequency interval, and controlling the microwave heating antenna of each region to sweep frequency according to the to-be-measured frequency value to obtain the microwave absorption rate of each region based on each to-be-measured frequency value, the means for accurately obtaining the microwave absorption rate is realized, and the subsequent calculation accuracy is improved.

[0137] In an example, the specific calculation process of the microwave absorption rate in step S2012 can include:

[0138] S20122, obtaining the transmitting energy and the receiving energy of the microwave heating antenna when using each to-be-tested frequency value for heating.

[0139] In an example, the controller can obtain the transmitting energy and the receiving energy of the microwave heating antenna when the microwave heating antenna uses each to-be-tested frequency value for sweeping frequency.

[0140] In an example, the transmitting energy can be the microwave energy generated when the microwave heating antenna uses one to-be-tested frequency value for heating. The transmitting energy can be denoted as .

[0141] In an example, the receiving energy can be the microwave energy received for feedback when the microwave heating antenna uses one to-be-tested frequency value for heating. The receiving energy can be denoted as .

[0142] S20123, determining the energy difference between the transmitting energy and the receiving energy. And determining the microwave absorption rate according to the ratio of the energy difference to the transmitting energy.

[0143] In an example, the formula for the controller to calculate the microwave absorption rate of one to-be-tested frequency value of one region can be:

[0144]

[0145] wherein, is the microwave absorption rate of the jth to-be-tested frequency value of the ith region in the kth period. is the transmitting energy. is the receiving energy.

[0146] In the present example, by obtaining the transmitting energy and the receiving energy of the microwave energy of each to-be-tested frequency of each region in the current period, the accurate calculation of the microwave absorption rate of each to-be-tested frequency of each region in the current period is realized, and the accuracy of the calculation of the heating power and the heating frequency in the subsequent heating of the period is improved.

[0147] In an example, the specific process of determining the heating frequency and the heating power of each region in the current period in step S202 can include:

[0148] S2021, determining the maximum absorption rate and the minimum absorption rate corresponding to the region according to the microwave absorption rate corresponding to each to-be-tested frequency value of each region in the current period.

[0149] Exemplarily, the controller can select a maximum value as the maximum absorption rate and a minimum value as the minimum absorption rate from the microwave absorption rates of the region corresponding to the to-be-tested frequency values.

[0150] In an example, the maximum absorption rate and the minimum absorption rate can be determined by comparing the microwave absorption rates of the region in the current period.

[0151] S2022, determining the heating frequency of the region in the current period according to the to-be-tested frequency value corresponding to the maximum absorption rate of the region.

[0152] Exemplarily, the controller determines the to-be-tested frequency value corresponding to the maximum absorption rate of each region. The controller can determine the to-be-tested frequency value as the heating frequency of the region in the period.

[0153] In an example, the calculation formula of the heating frequency can be recorded as:

[0154]

[0155] wherein, is the to-be-tested frequency value corresponding to the maximum microwave absorption rate of the ith region in the kth period under the condition of 900-930 MHz. The preset frequency interval is 1 MHz. The to-be-tested frequency value can include 31 integer values from 900-930. Wherein, is the microwave absorption rate of the ith region in the kth period. The values of i and k are positive integers.

[0156] S2023, determining the heating power of each region in the current period according to the maximum heating power, the maximum absorption rate and the minimum absorption rate of the region in the current period.

[0157] Exemplarily, the controller can have a preset mathematical model for calculating the heating power. The controller can use the mathematical model to determine the heating frequency and the heating power of each region in the current period according to the maximum absorption rate and the minimum absorption rate of the region in the current period and the maximum heating power.

[0158] In an example, the mathematical model can be a preset mathematical formula.

[0159] In another example, the mathematical model can be a preset deep learning model, a neural network model, a big data model, etc. The controller can input the maximum heating power, the maximum absorption rate and the minimum absorption rate of the region into the mathematical model, and output the heating power of the region in the period.

[0160] In the example, the maximum absorption rate and the minimum absorption rate of the region in the period are obtained to determine the heating power and the heating frequency, thereby improving the accuracy of the determination of the heating power and the heating frequency, and improving the final cooking effect.

[0161] In an example, the specific calculation process of the heating power in the step S2023 can include:

[0162] S20231, determining a power weight according to the maximum absorption rate of the region in the first period and the maximum absorption rate and the minimum absorption rate of the region in the current period.

[0163] In an example, the controller can adjust the subsequent heating power based on the first period. Therefore, the controller can calculate the power weight based on the maximum absorption rate of the first period and the maximum absorption rate and the minimum absorption rate of the region in the current period.

[0164] In an example, in the calculation process of the power weight, the controller can first determine a first parameter according to the difference between the maximum absorption rate and the minimum absorption rate of the region in the current period. Second, the controller can determine a second parameter according to the difference between the maximum absorption rate of the region in the first period and the minimum absorption rate of the region in the current period. Third, the controller can determine the power weight according to the ratio of the first parameter and the second parameter.

[0165] In an example, the calculation formula of the power weight can be recorded as:

[0166]

[0167] wherein, is the maximum absorption rate of the i-th region in the k-th period. is the minimum absorption rate of the i-th region in the k-th period.

[0168] S20232, determining the heating power of the region in the current period according to the maximum heating power and the power weight.

[0169] In an example, the controller can calculate the product of the maximum heating power and the power weight to obtain the heating power of the region in the current period.

[0170] In the example, the power weight is calculated, and the heating power is calculated according to the power weight and the maximum heating power, thereby realizing the accurate calculation of the heating power, improving the calculation accuracy of the heating power, and improving the heating effect.

[0171] In an example, in order to make the food mature faster in the initial stage, the maximum output power can be used as the heating power for microwave heating in the first period or in the first preset number of periods.

[0172] In an example, before step S201, the controller can also determine which regions are placed with food, so that in the subsequent execution process, only the microwave heating antennas of the regions placed with food can be controlled, and the process includes:

[0173] S204, determining whether the region is placed with food.

[0174] In an example, the controller can first acquire detection information in the cavity through the sensor. Based on the detection information, the controller can determine whether each region is placed with food.

[0175] In an example, the controller can also determine whether the region is placed with food according to the microwave reflectivity when the microwave reflectivity is acquired for the first time. Since the microwave absorption rate of the food is different from the absorption rate of the equipment inside the cavity, the controller can determine whether the region is placed with food based on the microwave absorption rate.

[0176] In an example, the sensor can be a visual sensor.

[0177] For example, when the sensor is a monocular camera, the controller can determine whether each region in the cavity is placed with food through image detection. The controller can crop a region image of each region from the image according to the position of the visual sensor. The controller can determine whether the region image is placed with food through image recognition.

[0178] For another example, when the sensor is a binocular camera, the controller can determine whether the depth of each region in the cavity is consistent with that when the region is not placed with food through depth detection. If consistent, it can be determined that the region is not placed with food. If inconsistent, it can be determined that the region is placed with food.

[0179] In an example, the sensor can be a weight sensor. A weight sensor can be arranged below each region. The controller can determine whether the region is placed with food by acquiring the value detected by the weight sensor.

[0180] S205, if the region is not placed with food, the microwave heating antenna of the region is turned off.

[0181] In an example, when the controller determines that the region is placed with food, the controller can continue to execute the contents of steps S201-S203.

[0182] The controller can turn off the microwave heating antenna of the region when it is determined that no food is placed in the region. Thus, the microwave heating antenna is not used inefficiently during the heating process, which results in waste of resources.

[0183] In this example, the control of the cooking device is achieved by determining whether food is placed in each region and determining whether to turn off the microwave heating antenna according to the determination result, which improves the control accuracy and saves energy.

[0184] Figure 6 Flowchart of the microwave partition heating method provided in this application Figure 2 , the method comprises: Figure 4 On the basis of the embodiment shown in the figure, when the cooking device is a micro-steaming and baking all-in-one machine, a microwave solid-state source is arranged on the micro-steaming and baking all-in-one machine. The inside of the micro-steaming and baking all-in-one machine is provided with two regions. The microwave heating antennas of the two regions are arranged as antenna A and antenna B, respectively. As shown in the figure, the method comprises: Figure 6

[0185] S301, the user starts the partition heating function of the micro-steaming and baking all-in-one machine.

[0186] Exemplarily, when the user does not start the partition heating function, the micro-steaming and baking all-in-one machine does not adjust the heating power and the heating frequency of each partition according to the partition. All the microwave heating antennas in the micro-steaming and baking all-in-one machine perform the same control.

[0187] When the user starts the partition heating, the controller can determine the heating frequency and the heating power of the partition according to the microwave absorption rate of the food material in each region.

[0188] S302, place different kinds of food materials in different regions according to the recipe prompt, and turn on the microwave function.

[0189] S303, determine the microwave absorption rate corresponding to each frequency value in the current period by controlling the microwave solid-state source single-channel alternate sweep frequency.

[0190] S304, compare the microwave absorption rates corresponding to each frequency value to determine that the power value corresponding to the highest microwave absorption rate of the two regions in the period is the heating power.

[0191] S305, in the first period, the maximum heating power is taken as the heating power of the current period.

[0192] S306, in the second period, determine the microwave absorption rate under different frequency values by controlling the microwave solid-state source single-channel alternate sweep frequency.

[0193] S307, compare the microwave absorption rates of each frequency to determine that the power value corresponding to the highest microwave absorption rate of the two regions in the period is the heating power. ​

[0194] S308, determine the heating power of the two regions respectively according to the heating power of the two regions.

[0195] S309, heat the two regions according to the heating power and the heating frequency of each region.

[0196] S310, cycle the above steps S306 to S309.

[0197] S311, end of cooking.

[0198] Figure 7 The structure diagram of the microwave partition heating device provided in the present application is shown in the following figure: Figure 7 As shown in the figure, it is applied to a cooking device, and the cavity of the cooking device includes a plurality of regions for placing food, and each region is provided with a microwave heating antenna, and the microwave partition heating device 40 provided in the embodiment includes:

[0199] The acquisition module 401 is configured to periodically acquire the microwave absorption rate corresponding to different frequency values in a preset frequency range of each region during the cooking process.

[0200] The processing module 402 is configured to determine the heating frequency and the heating power of each region in the current period according to the maximum heating power preset by the cooking device and the microwave absorption rate in the current period, and control the microwave heating antenna of each region to heat according to the heating frequency and the heating power in the current period.

[0201] In an example, the acquisition module 401 is configured to:

[0202] Generate a plurality of to-be-tested frequency values in the preset frequency range according to a preset frequency interval.

[0203] Acquire the microwave absorption rate of each region when the microwave heating antenna of each region is heated using each to-be-tested frequency value in a low-power mode.

[0204] In an example, the acquisition module 401 is configured to:

[0205] According to the preset order of each region, sequentially control the microwave heating antenna of each region to heat using the to-be-tested frequency value, and obtain the microwave absorption rate corresponding to each to-be-tested frequency value of each region.

[0206] In an example, the acquisition module 401 is configured to:

[0207] Acquire the transmission energy and the reception energy of the microwave heating antenna when the microwave heating antenna is heated using each to-be-tested frequency value.

[0208] Determine the energy difference value of the transmission energy and the reception energy, and determine the microwave absorption rate according to the ratio of the energy difference value to the transmission energy.

[0209] In an example, the processing module 402 is configured to:

[0210] According to the microwave absorption rates corresponding to the to-be-tested frequency values of the regions in the current period, determine the maximum absorption rate and the minimum absorption rate corresponding to the regions.

[0211] According to the to-be-tested frequency value corresponding to the maximum absorption rate of the region, determine the heating frequency of the region in the current period.

[0212] According to the maximum heating power, the maximum absorption rate and the minimum absorption rate of the region in the current period, determine the heating power of each region in the current period.

[0213] In an example, the processing module 402 is configured to:

[0214] According to the maximum absorption rate of the region in the first period, and the maximum absorption rate and the minimum absorption rate of the region in the current period, determine the power weight.

[0215] According to the maximum heating power and the power weight, determine the heating power of the region in the current period.

[0216] In an example, the processing module 402 is configured to:

[0217] According to the difference between the maximum absorption rate and the minimum absorption rate of the region in the current period, determine the first parameter.

[0218] According to the difference between the maximum absorption rate of the region in the first period and the minimum absorption rate of the region in the current period, determine the second parameter.

[0219] According to the ratio of the first parameter and the second parameter, determine the power weight.

[0220] In an example, the obtaining module 401 is configured to:

[0221] According to the heating optimization degree selected by the user, determine the period length. The period length represents the length of time during which the cooking device determines the heating frequency and the heating power of each region, and uses the heating frequency and the heating power to heat.

[0222] In an example, the obtaining module 401 is configured to:

[0223] Determine whether the region is placed with food.

[0224] If the region is not placed with food, turn off the microwave heating antenna of the region.

[0225] The microwave partition heating device provided in the embodiment can execute the method provided in the method embodiment, and has similar implementation principles and technical effects. Therefore, the embodiment will not be described here.

[0226] Figure 7A structural schematic diagram of the controller provided in the present application is shown in FIG. 1. As shown in the figure, the controller 500 provided in the present embodiment includes at least one processor 501 and a memory 502. Optionally, the controller 500 further includes a communication component 503. The processor 501, the memory 502 and the communication component 503 are connected through a bus 504. Figure 7

[0227] In the implementation process, the at least one processor 501 executes the computer-executable instructions stored in the memory 502, so that the at least one processor 501 performs the above-mentioned method.

[0228] The specific implementation process of the processor 501 can refer to the method embodiments described above, which have similar implementation principles and technical effects, and thus will not be described here again in the present embodiment.

[0229] In the above-mentioned embodiments, it should be understood that the processor can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the present application can be directly embodied as execution completed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

[0230] The memory can include a random access memory (RAM), and can also include a non-volatile memory (NVM), for example, at least one disk memory.

[0231] The bus can be an industry standard architecture (ISA) bus, a peripheral component (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, the bus in the drawings of the present application does not mean only one bus or one type of bus.

[0232] The present application also provides a computer program product, including a computer program, which is executed by a processor to implement the above-mentioned method.

[0233] ​The application further provides a computer readable storage medium, wherein computer execution instructions are stored in the computer readable storage medium, and when a processor executes the computer execution instructions, the above method is realized.

[0234] The readable storage medium can be realized by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0235] An exemplary readable storage medium is coupled to the processor, so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be an integral part of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the readable storage medium can also exist as discrete components in the device.

[0236] The division of units is only a logical function division, and in actual implementation, there can be another division mode, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0237] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment.

[0238] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0239] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the part of the present application that essentially contributes to the prior art or the part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the embodiments of the method of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk, and various program code storage media.

[0240] Those skilled in the art can understand that all or part of the steps of the above-mentioned method embodiments can be completed by program instruction related hardware. The aforementioned program can be stored in a computer readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk, and various program code storage media.

[0241] Finally, it should be noted that: those skilled in the art will easily think of other embodiments of the present application after considering the specification and practicing the disclosed application. The present application is intended to cover any variations, uses or adaptations of the present application which follow the general principles of the present application and include known or customary technical means in the art which are not disclosed in the present application, and is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present application is only limited by the appended claims.

Claims

1. A method of microwave zone heating, characterized by, The application is applied to a cooking device, the cooking device comprises a plurality of areas for placing food in the cavity of the cooking device, each area is provided with a microwave heating antenna, comprising: During the cooking process, the microwave absorption rate corresponding to different frequency values in a preset frequency range of each area is periodically obtained; According to the maximum heating power preset by the cooking device and the microwave absorption rate in the current period, the heating frequency and heating power of each area in the current period are determined; In the current period, the microwave heating antenna of each area is controlled to heat according to the heating frequency and the heating power; According to the maximum heating power preset by the cooking device and the microwave absorption rate in the current period, the heating frequency and heating power of each area in the current period are determined, comprising: According to the microwave absorption rate corresponding to each to-be-measured frequency value of each area in the current period, the maximum absorption rate and the minimum absorption rate of the area are determined; According to the to-be-measured frequency value corresponding to the maximum absorption rate of the area, the heating frequency of the area in the current period is determined; According to the maximum heating power, the maximum absorption rate and the minimum absorption rate of the area in the current period, the heating power of each area in the current period is determined; Wherein, the to-be-measured frequency value is generated according to a preset frequency interval in the preset frequency range.

2. The method of claim 1, wherein, Obtaining the microwave absorption rate corresponding to different frequency values in a preset frequency range of each area, comprising: Obtaining the microwave absorption rate of the microwave heating antenna of each area in the low-power mode when heating with each to-be-measured frequency value.

3. The method of claim 2, wherein, Obtaining the microwave absorption rate of the microwave heating antenna of each area in the low-power mode when heating with each to-be-measured frequency value, comprising: According to the preset order of each area, the microwave heating antenna of each area is sequentially controlled to heat with the to-be-measured frequency value, so as to obtain the microwave absorption rate corresponding to each to-be-measured frequency value of each area.

4. The method of claim 2, wherein, Obtaining the microwave absorption rate of the microwave heating antenna of each area in the low-power mode when heating with each to-be-measured frequency value, comprising: Obtaining the emission energy and the receiving energy of the microwave heating antenna when heating with each to-be-measured frequency value; Determining the energy difference value of the emission energy and the receiving energy; and determining the microwave absorption rate according to the ratio of the energy difference value to the emission energy.

5. The method of claim 1, wherein, According to the maximum heating power, the maximum absorption rate and the minimum absorption rate of the area in the current period, the heating power of each area in the current period is determined, comprising: According to the maximum absorption rate of the area in the first period, and the maximum absorption rate and the minimum absorption rate of the area in the current period, a power weight is determined; According to the maximum heating power and the power weight, the heating power of the area in the current period is determined.

6. The method of claim 5, wherein, According to the maximum absorption rate of the area in the first period, and the maximum absorption rate and the minimum absorption rate of the area in the current period, a power weight is determined, comprising: determine a first parameter according to a difference between the maximum absorption rate and the minimum absorption rate of the region in the current cycle; determine a second parameter according to a difference between the maximum absorption rate of the region in the first cycle and the minimum absorption rate of the region in the current cycle; determine the power weight according to a ratio of the first parameter and the second parameter.

7. The method according to any one of claims 1 to 6, characterized in that, The method comprises: determine a cycle length according to a heating optimization degree selected by a user; the cycle length represents a length of time during which the cooking device determines the heating frequency and the heating power of each region and uses the heating frequency and the heating power to heat.

8. The method according to any one of claims 1-6, characterized in that, Before obtaining the microwave absorption rate corresponding to different frequency values in a preset frequency range of each region, the method further comprises: determine whether the region is placed with food; if the region is not placed with food, turn off the microwave heating antenna of the region.

9. A microwave partition heating device, characterized by, Applied to a cooking device, the cooking device comprises a plurality of regions for placing food in a cavity of the cooking device, each region is provided with a microwave heating antenna, and the cooking device comprises: an obtaining module, configured to periodically obtain the microwave absorption rate corresponding to different frequency values in a preset frequency range of each region during cooking; a processing module, configured to determine the heating frequency and the heating power of each region in a current cycle according to the maximum heating power preset by the cooking device and the microwave absorption rate in the current cycle, and control the microwave heating antenna of each region to heat according to the heating frequency and the heating power in the current cycle; wherein, the determination of the heating frequency and the heating power of each region in the current cycle according to the maximum heating power preset by the cooking device and the microwave absorption rate in the current cycle comprises: determining the maximum absorption rate and the minimum absorption rate of the region according to the microwave absorption rate corresponding to each to-be-measured frequency value of each region in the current cycle; determining the heating frequency of the region in the current cycle according to the to-be-measured frequency value corresponding to the maximum absorption rate of the region; and determining the heating power of each region in the current cycle according to the maximum heating power, the maximum absorption rate and the minimum absorption rate of the region in the current cycle; wherein, the to-be-measured frequency value is generated according to a preset frequency interval in the preset frequency range.

10. A controller characterized by comprising: comprise: a memory and a processor; the memory stores computer execution instructions; the processor executes the computer execution instructions stored in the memory, so that the processor executes the method of any one of claims 1-8.

11. A cooking apparatus, characterized by, comprise: a microwave solid-state source, a plurality of coaxial cables, a plurality of microwave heating antennas, a cavity and the controller of claim 10; the microwave solid-state source is arranged on the top surface of the cavity; the microwave heating antennas are connected with the microwave solid-state source through the coaxial cables; the microwave solid-state source is connected with the controller; the top surface of the cavity is provided with a plurality of through holes; the microwave heating antennas are fixed on the top surface of the cavity through the through holes.

12. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer-executable instructions which, when executed by the processor, implement the method of any one of claims 1-8.

13. A computer program product, characterised in that, A computer program which, when executed by the processor, implements the method of any one of claims 1-8.

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